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Publication numberCN100489641 C
Publication typeGrant
Application numberCN 00101650
Publication date20 May 2009
Filing date25 Jan 2000
Priority date25 Jan 1999
Also published asCN1262457A, US6345155
Publication number00101650.4, CN 00101650, CN 100489641 C, CN 100489641C, CN-C-100489641, CN00101650, CN00101650.4, CN100489641 C, CN100489641C
Inventors东條贵浩, 塩野彻
Applicant索尼公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Light emission controlling equipment, camera equipment and light emission controlling method
CN 100489641 C
Abstract  translated from Chinese
一种光发射控制设备,包含光接收单元2、A/D转换部分6、积分部分7、比较部分8和控制部分9。 A light emission control device, comprising a light receiving unit 2, A / D conversion section 6, the integral portion 7, 8 and the comparing section 9 control section. 光接收单元2输出相应于其所接收的光量的一光接收信号。 The light receiving unit 2 outputs corresponding to the amount of light it receives a light reception signal. A/D转换部分6将该光接收信号转换为数字数据。 A / D conversion section 6 converts the light reception signal into digital data. 积分部分7对该数字数据积分,产生一积分值。 7 integral part of the digital data integration, produce an integration value. 比较部分8将该积分值与一预定阈值比较。 The comparing section 8 integral value is compared with a predetermined threshold value. 当积分值到达预定阈值时,控制装置向光发射控制装置11输出一光发射停止请求,从而使光发射控制装置11停止发射光。 When the integrated value reaches a predetermined threshold value, the control means controlling the light emitting means 11 outputs a light emission stop request, so that the light emission control means 11 stops emitting light.
Claims(19)  translated from Chinese
1. 一种光发射控制设备,包含:光接收装置,用于输出相应于所接收的光量的光接收信号;控制装置,用于根据所述接收的光量控制光接收装置的输出增益;模拟/数字转换装置,用于将所述光接收信号转换为数字数据;和其中,所述控制装置进行控制,向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光,其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 A light emission control device, comprising: light receiving means, for outputting corresponding to the amount of light received by the light-receiving signal; and a control means for receiving the amount of light in accordance with said control output gain of the light receiving means; Analog / digital conversion means for converting said light-receiving signals into digital data; and wherein the control means controls the light emitting means to output a light emission stop request, whereby, when the digital data by integrating When the integration value obtained reaches a predetermined threshold value, so that the light emitting means stops emitting light, wherein at least said predetermined threshold value is determined based on an output of the gain of said light receiving means.
2. 如权利要求l所述的光发射控制设备,其中所述控制装置包含: 一积分部分,用于对所述数字数据积分,由此产生所述积分值; 一比较部分,用于将所述积分值与所述预定阈值相比较;和一控制部分,用于向所述光发射装置输出所述光发射停止请求,以使当所述积分值达到所述预定阈值时,所述光发射装置停止发射光。 2. The light emission control apparatus according to claim l, wherein said control means comprises: an integrating portion for integrating the digital data, thereby generating said integration value; a comparing portion for the said integral value and the predetermined threshold value; and a control section for emitting means to the light output of the light emission stop request, so that when the integration value reaches the predetermined threshold value, the light emission means stops emitting light.
3. 如权利要求l所述的光发射控制设备,其中所述控制装置在经过规定时间后输出所述光发射停止请求。 L light according to claim emission control device, wherein said control means after a predetermined time after the light emission stop output request.
4. 如权利要求l所述的光发射控制设备,其中所述输出增益按照一摄像机设备的摄像数据为所述光接收装置选择。 The light emission control apparatus according to claim l, wherein said imaging data output gain of a camera apparatus according to the selection of the light receiving means.
5. 如权利要求4所述的光发射控制设备,其中所述摄像数据表示包括到摄像目标的距离、光圏开口、曝光灵敏度和所述光发射装置的闪光指数中至少之一的摄像条件。 The optical transmitter of claim 4, wherein the control device, wherein the image data comprises a representation of the imaging target distance, rings of light openings, light exposure sensitivity and the imaging conditions guide number of at least one device emitting.
6. 如权利要求l所述的光发射控制设备,其中所述模拟/数字转换装置将所述数字数据提供给一外部设备。 6. The light emission control apparatus according to claim l, wherein said analog / digital conversion means converts the digital data to an external device.
7. —种摄像机设备,包含: 一图像检测部分,用于捕获一目标图像;光发射装置,设计成响应于一光发射停止请求而停止发射光; 光接收装置,用于输出相应于所接收的光量的一光接收信号; 控制装置,用于根据所述接收的光量控制光接收装置的输出增益; 模拟/数字转换装置,用于将所述光接收信号转换为数字数据;和其中,所述控制装置进行控制,向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光,其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 7. - Species camera apparatus, comprising: an image detection portion, for capturing an object image; a light emitting device designed to emit light in response to a stop request to stop emitting light; a light receiving means for receiving an output corresponding to the a light receiving signal of the light amount; control means, according to the amount of light received by the light receiving means controlling the output gain; analog / digital conversion means for converting the light-receiving signals into digital data; and wherein the said control means controls the output of a light-emitting light-emitting device stop request, thus, when it reaches a predetermined threshold value by integrating the digital data obtained by integrating that said light emitting means to stop emitting light, wherein , the predetermined threshold value is determined at least based on an output of the gain of said light receiving means.
8. 如权利要求7所述的摄像机设备,其中所述控制装置包含: 一积分部分,用于对所述数字数据积分,由此产生所述积分值; 一比较部分,用于将所述积分值与所述预定阈值相比较;和一控制部分,用于向所述光发射装置输出所述光发射停止请求,以使当所述积分值达到所述预定阈值时,所述光发射装置停止发射光。 8. The camera apparatus according to claim 7, wherein said control means comprises: an integrating portion for integrating the digital data, thereby generating said integration value; a comparing portion for integrating the value and the predetermined threshold value; and when a control section for the output of the light-emitting device having the light emission stop request, so that when the integration value reaches the predetermined threshold value, the light emitting apparatus is stopped light is emitted.
9. 如权利要求7所述的摄像机设备,其中所述控制装置在经过规定时间后输出所述光发射停止请求。 9. The camera apparatus according to claim 7, wherein said control means after a predetermined time after the light emission stop output request.
10. 如权利要求7所述的摄像机设备,其中按照表示所述积分值是否已到达所述预定阈值的数据和/或表示所述光发射停止请求是否已在经过规定时间后被输出的数据来校正摄像数据。 10. The camera apparatus according to claim 7, wherein according to represents the integration value reaches the predetermined data whether the threshold value and / or whether the data representing the light emission stop request has been output after the lapse of a predetermined time to camera calibration data.
11. 如权利要求7所述的摄像机设备,其中按照表示所述积分值是否已到达所述预定阈值的数据和/或表示所述光发射停止请求是否已在经过规定时间后被输出的数据,产生一警报,以指示所述积分值已到达所述预定阈值和/或所述光发射停止请求已被输出。 11. The camera apparatus according to claim 7, wherein according to represents the integration value reaches the predetermined data whether the threshold value and / or the light emission stop request indicates whether the data in the predetermined time has elapsed after the output, generating an alarm indicating the integration value has reached the predetermined threshold value and / or the light emission stop request has been output.
12. 如权利要求7所述的摄像机设备,其中将表示所述积分值已到达所述预定阈值的数据和/或表示所述光发射停止请求已在经过规定时间后被输出的数据,附加到摄像数据。 12. The camera apparatus according to claim 7, wherein said indicating the integration value has reached the predetermined threshold data and / or data representing the light emission stop request has been output after the lapse of a predetermined time, attached to the imaging data.
13. 如权利要求7所述的摄像机设备,其中所述输出增益按照摄像数据为所述光接收装置选择。 13. The camera apparatus according to claim 7, wherein the output gain according to the imaging data selected as the light receiving means.
14. 如权利要求13所述的摄像机设备,其中所述摄像数据表示包括到摄像目标的距离、光圈开口、曝光灵敏度和所述光发射装置的闪光指数中至少之一的摄像条件。 14. The camera apparatus according to claim 13, wherein the image data comprises a representation of the imaging target distance, aperture opening, the sensitivity and the exposure conditions for flash index optical imaging apparatus in which at least one of the transmission.
15. 如权利要求7所述的摄像机设备,其中所述模拟/数字转换装置将所述数字数据提供给一外部设备。 15. The camera apparatus according to claim 7, wherein said analog / digital conversion means converts the digital data to an external device.
16. —种光发射控制方法,包含步骤:输出相应于由光接收装置接收的光量的一光接收信号; 根据所述接收的光量控制光接收装置的输出增益; 由模拟/数字转换装置将所述光接收信号转换为数字数据;和由控制装置向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光,其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 16. - seed light emission control method, comprising the steps of: receiving an optical output signal corresponding to the amount of light received by the light receiving means; a control output gain of the light receiving device according to the amount of light received; an analog / digital conversion means the the light receiving signals into digital data; and by the control device of a light emission stop request to the output light emitting device, whereby, when the integration value by integrating the digital data obtained reaches a predetermined threshold value, so that the light emitting means stops emitting light, wherein at least said predetermined threshold value is determined based on an output gain of the light receiving means.
17. 如权利要求16所述的光发射控制方法,其中所述控制装置在经过规定时间后输出所述光发射停止请求。 17. The light emission control method according to claim 16, wherein said control means after a predetermined time after the light-emitting output stop request.
18. 如权利要求16所述的光发射控制方法,还包括按照一摄像机设备的摄像数据为所述光接收装置选择一输出增益的步骤。 18. The light emission control method according to claim 16, further comprising a camera apparatus according to imaging data receiving step of selecting an output gain of said optical means.
19. 如权利要求18所述的光发射控制方法,其中所述摄像数据表示包括到摄像目标的距离、光圈开口、曝光灵敏度和所述光发射装置的闪光指数中至少之一的摄像条件。 19. The light emission control method according to claim 18, wherein the image data comprises a representation of the imaging target distance, aperture opening, the sensitivity and the exposure conditions for flash index optical imaging apparatus in which at least one of the transmission.
Description  translated from Chinese

光发射控制设备、摄像机设备和光发射控制方法 Light emission control equipment, camera equipment and the light emission control methods

技术领域 Technical Field

本发明涉及一种光发射控制设备和一种摄像(照相)机设备,每种设备都具有用于发射光的一光发射装置,按照从摄像目标所反射的光来控制该光发射装置。 The present invention relates to a light-emitting device and a light emission control image pickup device (camera) machine equipment, each device having a light emitting means for emitting light, according to the light reflected from the imaging target is controlled. 本发明还涉及一种应用于摄像目标的控制光发射的方法。 The present invention also relates to a method applied to the imaging of light emission control targets.

背景技术 Background

闪光灯摄像是在某些情况下为了取得轮廓清楚的相片而进行的。 Flash imaging is in some cases in order to obtain a clear outline photo carried out. 闪光灯摄像是采用如闪光灯等光发射控制装置而实现的。 Flash camera is using as flash and other light emission control device achieved. 从光发射控制装置发射的光被控制,以完成最佳闪光灯摄像。 The light emitted from the light emission control means is controlled, in order to complete the best flash video.

图l描述了设计用在闪光灯摄像中的一种传统的光发射控制系统。 Figure l describes a conventional optical emission control system designed for use in the flash of the camera. 图1 所示的系统是以下列方式操作的,以实施闪光灯摄像。 The system shown in Figure 1 is operated in the following manner, in order to implement a flash camera.

光发射装置102响应于由包含在摄像机设备中的微处理器单元(MPU)发出的光发射请求而启动光发射。 Light emitting device 102 in response to a request to transmit light emitted by the camera device comprising a microprocessor unit (MPU) and start the light emission. 光接收单元103接收从摄像的目标200反射的光。 Light-receiving unit 103 receives light from the imaging target 200 reflective. 光接收单元103的输出提供给电容器104和105并以电荷形式存储在其中。 The output of the light receiving unit 103 is supplied to capacitors 104 and 105 and the charge stored therein. 相应于存储在电容器104和105中的电荷的电压V,与一参考电压Vs进行比较。 Corresponding to the charge stored in the capacitor 104 and the voltage 105 V, with a reference voltage Vs is compared. 当电压V,到达参考值Vs时,比较部分106输出一光发射停止请求。 When the voltage V, reached the reference value Vs, comparing section 106 outputs a light emission stop request. 一旦接收到该光发射停止请求,则光发射装置102停止发射光,从而控制光的发射。 Upon receiving the request to stop the light emission, the light emission 102 stops emitting light, thereby controlling the light emitting means. 电阻器107决定由电容器104和105累积的电流。 Resistor 107 is determined by the capacitor 104 and 105 cumulative current. 应注意,电容器105通过开关108接地。 It should be noted, the capacitor 105 via the switch 108 to ground. 开关108在微处理器101的控制下进行切换。 Switch 108 under control of the microprocessor 101 to switch. 当开关108如此切换时,改变电荷累积部分的电容量,从而改变电压过渡到参考值Vs的特性。 When the switch 108 is switched so changing the capacitance of the charge accumulation portion, thereby changing the voltage value Vs to the reference transition characteristics.

图2示出电压V,如何随着时间改变。 Figure 2 shows the voltage V, how to change over time. 图3示出当光发射装置102停止发射光时电压V,如何改变。 Figure 3 shows a light-emitting device 102 stops emitting light when a voltage V, how to change when. 当电压Vi到达参考值Vs时,比较部分106产生一光发射停止请求。 When the voltage Vi reaches the reference value Vs, comparing section 106 generates a light emission stop request. 如从图3所看到的,电压V,停止改变,此时光发射装置102响应于所述光发射停止请求而停止发射光。 As seen from FIG. 3, the voltage V, stops changing, this time transmitting means 102 in response to the stop request to stop emitting light emits light.

在传统的光发射控制系统中,电容器104和105及比较部分106构成检测光接收单元103所接收的光量的部分。 In the conventional light emission control systems, capacitors 104 and 105 and comparison section 106 constituting the light receiving portion detects the amount of light received by the unit 103. 电容器104和105及比较部分106处理模拟数据。 Capacitors 104 and 105 and comparison section 106 processes analog data. 不可避免的是,光发射控制的精确性在很大程度上依赖于电容器104和105的特性、这些电容器的放电特性以及比较部分l 06的性能。 Inevitably, the light emission control accuracy is largely dependent on the characteristics of the capacitor 104 and 105, these capacitors discharge characteristics and performance of the comparing section l 06.

由于电容器104和105及比较部分106为光发射控制系统的主要部件,该系统的操作特性必须在制作该系统的过程中采用比如可变电阻器或电位器等附加电路部件来调节。 Since the capacitor 104 and the comparator 105 and the light emitting portion 106 as the main components of the control system, the operating characteristics of the system must be used such as a variable resistor or potentiometer and other additional circuit components in the production process of the system is adjusted. 这种操作特性的调节很麻烦并且增加了光发射控制系统的成本。 Adjust the operating characteristics of this very troublesome and increases the cost of the optical emission control system.

此外,想要提高控制光发射装置102的自由度,以增加光发射控制的精确度。 Further, the light emitting device 102 wants to improve the control of the degree of freedom, in order to increase the accuracy of the light emission control.

发明内容 DISCLOSURE

本发明是鉴于上面的描述而做出的。 The present invention is made in view of the above description of. 本发明的目的是提供一种光发射控制设备、 一种摄像(照相)机设备和一种光发射控制方法,它们能以高精度和低成本控制光的发射并能增加控制所用的光发射装置的自由度。 The purpose of the present invention is to provide a light emission control equipment, a camera (camera) machine control device and a light emitting device used for a light-emission control methods that can be controlled with high accuracy and low cost light emission and increase freedom.

为达到上述目的,本发明提供一种光发射控制设备,包含:光接收装置,用于输出相应于所接收的光量的光接收信号;控制装置,用于根据所述接收的光量控制光接收装置的输出增益;模拟/数字转换装置,用于将所述光接收信号转换为数字数据;其中所述控制装置进行控制,.向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光,其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 To achieve the above object, the present invention provides a light emission control device, comprising: light receiving means, for outputting corresponding to the amount of light received by the light receiving signals; control according to the amount of light of the light receiving means for receiving control means for the output gain; analog / digital conversion means for converting the light receiving signals into digital data;. wherein said control means controls the light emitting means to output a light emission stop request, whereby, when the by When the integrated value obtained by integrating said digital data reaches a predetermined threshold value, so that the light emitting means to stop emitting light, wherein at least said predetermined threshold value is determined based on an output gain of the light receiving means.

本发明还提供一种摄像机设备,包含: 一图像检测部分,用于捕获一目标图像;光发射装置,设计成响应于一光发射停止请求而停止发射光; 光接收装置,用于输出相应于所接收的光量的一光接收信号;控制装置, 用于根据所述接收的光量控制光接收装置的输出增益;模拟/数字转换装置,用于将所述光接收信号转换为数字数据;其中所述控制装置进行控制,向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光, 其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 The present invention also provides a camera apparatus, comprising: an image detection portion, for capturing an object image; a light emitting device, designed to stop emitting light in response to a request to stop emitting light; a light receiving means, for outputting the corresponding a light amount of the light receiving signal received; control means, according to the amount of light received by the light receiving means controlling the output gain; analog / digital conversion means for converting the light-receiving signals into digital data; wherein said control means controls the output of a light-emitting light-emitting device stop request, thus, when it reaches a predetermined threshold value by integrating the digital data obtained by integrating that said light emitting means to stop emitting light, wherein , the predetermined threshold value is determined at least based on an output of the gain of said light receiving means.

本发明还提供一种光发射控制方法,包含步骤:输出相应于由光接收装置接收的光量的一光接收信号;根据所述接收的光量控制光接收装置的输出增益;由模拟/数字转换装置将所述光接收信号转换为数字数据;和由控制装置向光发射装置输出一光发射停止请求,由此,当通过对所述数字数据积分而得到的积分值达到一预定阈值时,使所述光发射装置停止发射光,其中,所述预定阈值是至少根据所述光接收装置的输出增益确定的。 The present invention also provides a light emission control method comprising the steps of: receiving an output signal corresponding to a light amount of light received by the light receiving means; a control output gain of the light receiving device according to the amount of light received; an analog / digital conversion means the light-receiving signals into digital data; and by the control device to the output of a light-emitting light-emitting device to stop the request, thus, when the integration value by integrating the digital data obtained reaches a predetermined threshold value, so that the said light emitting means stops emitting light, wherein at least said predetermined threshold value is determined based on an output gain of the light receiving means.

附图说明 Brief Description

图l是一种传统的控制光发射装置的光发射控制系统的方框图; Figure l is a block diagram of a conventional light emitting device controlling the light emission control systems;

图2是说明在所述传统的光发射控制系统中,所述光接收单元的输出如何随时间变化的曲线图; FIG 2 is a diagram illustrating a conventional light emission in the control system, the output of the light receiving unit how the graph showing the change with time;

图3是说明在所述传统的光发射控制系统中,当所述光发射装置停止发射光时,所述光接收单元的输出如何随时间变化的曲线图; Figure 3 illustrates the conventional optical emission control system, when the light emitting means to stop emitting light, the output of the light-receiving unit how the graph showing the change over time;

图4是一种按照本发明的包括光发射控制设备的光发射控制系统的方框 Figure 4 is a block in accordance with the present invention comprises a light emission control device light emission control systems

图; Figure;

图5是描述由图4所示的光发射控制系统控制的光发射装置的图; FIG. 5 is a diagram of light emitted by the light emitting device control system shown in FIG. 4 Control;

图6是说明当用在图4的系统中的光接收单元接收到从一摄像目标反射的光时,该光接收单元的输出如何随时间变化的曲线图; Figure 6 is a light receiving when used in the system of Figure 4 in an imaging unit receives light reflected from the target, the output of the light receiving unit how the graph showing the change over time;

图7是说明所述光接收单元的输出如何随时间变化,直到所述光发射装置响应于一光发射停止请求而停止发射光的曲线图; Figure 7 illustrates how the output of said light receiving means varies with time, until the light-emitting device in response to a graph showing a light emission stop request to stop emitting light;

图8是说明当饱和时所述光接收单元的输出如何随时间变化的曲线图; Figure 8 illustrates how the output when the saturation of the light-receiving unit graph showing the change with time;

图9是用于解释当所述光接收单元的输出电平变小时,经过规定时间之后,要求停止光发射的情况的曲线图; Figure 9 is used to explain when the output level of the light-receiving unit becomes small, after a predetermined time, to stop the graph of light emission situation;

图10是解释在图4的系统中执行的操作顺序的流程图,用于在一输出增益被选择之后,当在积分值到达一参考值或规定时间过去时产生一光发射停止请求时,使所述光发射装置停止发射光;和 FIG. 10 is a flowchart explaining the sequence of operations performed in the system of FIG. 4, for an output gain is selected, when the integration value reaches a predetermined reference value or time in the past when a light emission stop request generates, said light emitting means to stop emitting light; and

图1 l是解释为从提供于图4的系统中的A/D (模拟/数字)转换部分连续获得数字数据而执行的操作顺序的流程图。 Figure 1 l is a flow chart explaining conversion portion provided continuous access to digital data in the system of Figure 4 A / D (analog / digital) and perform a sequence of operations.

具体实施方式 DETAILED DESCRIPTION

下面将参照附图描述本发明的一个实施例。 Referring to the drawings describing one embodiment of the present invention. 本实施例是包含按照本发明的光发射控制设备的光发射控制系统,其被设计成控制比如闪光灯这样的光发射装置。 This embodiment is included in accordance with the light emission control device light emission control system of the present invention, which is designed to control such a light-emitting device such as a flash. 如图4所示,光发射控制系统包含一光接收单元2(或光接收装置)、一A/D转换部分6、 一积分部分7、 一比较部分8、 一控制部分9和一光发射装置11。 4, the light emission control system comprises a light-receiving unit 2 (or light receiving means), an A / D conversion section 6, an integrating section 7, a comparison section 8, a control section 9 and a light emitting means 11. 光接收单元2产生与其所接收的光量相应的一光接收信号。 The light receiving unit 2 and the amount of light it receives to generate a corresponding one of the light receiving signal. A/D转换部分6将光接收单元2的输出转换为数字数据。 A / D conversion section 6 converts the output of the light receiving unit 2 into digital data. 积分部分7对光接收单元2的输出进行积分,获得一积分值。 Integrating section 7 outputs the light receiving unit 2 is integrated to obtain an integrated value. 比较部分8将该积分值与一规定参考值比较。 The integrated value comparing section 8 compared with a predetermined reference value. 当比较部分8检测出所述积分值大于所述参考值即规定阈值时,控制部分9 产生一光发射停止请求。 When the comparing section 8 detects the integral value that is greater than the predetermined threshold reference value, the control section 9 generates a light emission stop request. 该光发射停止请求提供给光发射装置ll。 The light emission stop request to the light-emitting device ll. 一旦接收到该光发射停止请求,则光发射装置ll停止发射光。 Upon receiving the request to stop the light emission, the light emitting means to stop emitting light ll.

在上述光发射控制系统中,A/D转换部分6将光接收单元2的输出转换为数字值,并且该数字值积分为一积分值。 In the above-described light emission control systems, A / D conversion section 6 converts the output of the light receiving unit 2 into digital values, and the digital integrated value is a value of the integral. 当该积分值到达所述参考值时, 比较部分产生一光发射停止请求。 When the integration value reaches the reference value, comparing section generates a light emission stop request. 该光发射停止请求提供给光发射装置11。 The light emission stop request to the light emitting device 11. 一旦接收到该光发射停止请求,则装置ll停止发射光。 Upon receiving the request to stop the light emission, the light emitting means is stopped ll.

光接收单元2接收从摄像的目标200反射的光。 The light receiving unit 2 receives the reflected light from the camera 200 goals. 单元2产生相应于其所接收的光量的一光接收信号。 Generating unit 2 corresponding to the amount of light it receives a light receiving signal. 光接收单元2的输出输入到A/D转换部分6。 Input and output of the light receiving unit 2 to A / D conversion section 6.

光接收单元2的输出值由电阻器3和4来确定。 The output value of the light receiving unit 2 by the resistors 3 and 4 is determined. 换言之,电阻器3和4确定光接收单元2的输出增益。 In other words, the resistor 3 and 4 determines the output gain of the light receiving unit 2. 电阻器4通过开关5接地,由微处理器单元(MPU)10接通或断开开关5。 Resistor 4 via the switch 5 is grounded by a microprocessor unit (MPU) 10 is turned on or off the switch 5. 由于电阻器4可接通或断开,因而能控制光接收单元2的输出增益。 Since the resistor 4 can be turned on or off, which can control the output gain of the light receiving unit 2. 当增益下降时,可防止光接收单元2的输出值饱和。 When the gain drops to prevent the output value of the light receiving unit 2 saturation.

电阻器3和4都可以是可由微处理器单元(MPU)控制的可变电阻器,以侵_ 控制光接收单元2的输出增益。 Resistors 3 and 4 can be by a microprocessor unit (MPU) controlled variable resistor to control the invasion _ light reception output gain unit 2.

A/D转换部分6接收由光接收单元2产生的光接收信号,该光接收光接收单元2的增益已被电阻器3和4以上述方式控制(或调节)。 A / D conversion section 6 receives the light reception signal generated by the light receiving unit 2, and the light-receiving gain of the light receiving unit 2 is the resistor 3 and 4 in the manner described above to control (or adjust). 部分6将光接收单元2的输出电压V2转换为数字数据。 The light receiving portion 6 output voltage V2 conversion unit 2 into digital data. 例如,仅通过对A/D转换部分6选择适当的采样频率和量化分辨率,该数字数据即可满足系统所需的精度要求。 For example, just by the A / D conversion section 6 selects an appropriate sampling frequency and quantization resolution, the digital data is needed to meet the accuracy requirements of the system. 由A/D转换部分6产生的处于数字数据形式的电压值输入到积分部分7。 By the A / D conversion section 6 generates a voltage value in the form of digital data is input to the integral part 7.

积分部分7对A/D转换部分6的输出值进行积分,得到一积分电压值。 Integrating section 7 pairs of A / D conversion of the output value integrating section 6, to obtain a voltage integral value. 也就是说,部分7产生表示光接收单元2已接收的光的总量的数字数据。 That is, section 7 generates a digital representation of the total amount of data of the light receiving unit 2 has received light. 积分部分7设计成当检测到从控制部分9输出到光发射装置11的光发射启动信号时开始对由A/D转换部分6输出的电压值的积分。 Integral part 7 is designed such that when the detected output from the control section 9 to begin by the A / D conversion section 6 of the integral value of the output voltage when the start signal light-emitting light-emitting device 11. 积分部分7还设计成,恰好在其开始对由A/D转换部分6输出的电压值的积分之前,清除其所保持的积分值。 Integral part 7 is also designed to, just at its beginning before 6 integral part of the output voltage value from the A / D converter, clear the integral value of its holding. 例如,当部分7接收到光发射启动信号时,清除保持在部分7中的积分值。 For example, when the light-emitting section 7 receives the start signal, clear to keep in section 7 of the integral value.

由积分部分7计算的积分值输入到比较部分8和微处理器单元10。 Integral value calculated by the integrating section 7 is input to the comparison section 8 and a microprocessor unit 10. 比较部分8将由积分部分7得到的积分值与控制部分9已输出的数字数据的参考值相比较。 Comparing the integral value of the integrating section 7 section 8 obtained compared with the control section 9 outputs the digital data reference value. 表示该比较结果的数据提供给控制部分9。 The comparison result indicates that the data supplied to the control section 9. 所述参考值是由与当前进行的摄像相关的各种数据项确定的。 Said reference value is carried out by the current associated with the imaging of various data items determined. 所述数据项为:到目标的距离、光圈开口、曝光灵敏度、光发射装置ll的闪光指数、光接收单元2的输出增益等。 The items are: the distance to the target, aperture opening, exposure sensitivity, light emitting device ll flash index, the light receiving output of the gain unit 2 and so on. 例如,可以增加光接收单元2的输出增益,从而将单元2的输出改变成对采样最好的电平。 For example, increasing the output gain of the light receiving unit 2, so that the output unit 2 to change the level of the best pairs of samples. 如果象这样改变了光接收单元2的输出增益, 则即使相应于单元2已接收的光量的值不同,输入到A/D转换部分6的值也可变得几乎相同。 If such a change as the output gain of the light receiving unit 2, even if the corresponding value of the amount of light received is different from the unit 2, the input to the A / D conversion value portion 6 may also become almost the same. 所述参考值是由在这种情况下选择的增益确定的。 The reference value is selected in this case to determine the gain. 这就使得可以根据光接收单元2实际接收的光量来控制光发射装置11 。 This makes it possible in accordance with the amount of light actually received the light receiving unit 2 to control the light emitting device 11.

当比较部分8检测出积分值到达参考值时,判断为光发射装置11已以所需方式发射光。 When comparing section 8 detects the integral value reaches the reference value, it is determined that the light-emitting device 11 is to emit light in a desired manner.

按照由比较部分8所得出的比较结果,控制部分9产生一光发射停止请求,以使光发射装置ll停止发射光。 In accordance with the comparison result obtained by the comparison section 8, the control section 9 generates a light emission stop request, so that the light-emitting device ll stop emitting light. 更精确地讲,当比较部分8判断出积分值已达到参考值时,控制部分9输出光发射停止请求。 More precisely, when the comparison section 28 judges that the integral value has reached the reference value, the control section 9 of the output light emission stop request.

控制部分9输出一光发射启动请求,以使光发射装置ll开始发射光。 The control section 9 outputs a light emission start request, so that the light-emitting device ll begin to emit light. 更具体地讲,当控制部分9从微处理器单元1Q接收到一光发射请求时,控制部分9将光发射启动请求输出到光发射装置11 。 More specifically, when the control section 9 1Q microprocessor unit receives an optical transmission request, the control section 9 from the light emitting start request output to the light emitting device 11.

到光发射装置11的各种请求是在一脉冲信号的前沿和后沿进行的。 Various requests to the light emitting device 11 is at the leading edge and a trailing edge of the pulse signal carried. 例如,控制部分9在脉冲信号的前沿产生光发射启动请求,而在脉冲信号的后沿产生光发射停止请求。 For example, the control section 9 generates a light emission start pulse signal at the leading edge of the request, and after the pulse signal generating light emission along the stop request.

微处理器单元10控制图4所示的光发射控制系统的各部分。 Each portion of the light emission control system shown in FIG. 10 controls microprocessor unit. 此外,单元10还控制所述系统的未在图4中示出的其它一些部分。 In addition, the system control unit 10 also is not illustrated in FIG. 4 the other portions.

光发射装置ll响应于光发射启动请求而开始发射光,而响应于光发射停止请求而停止发射光。 Light emitting means in response to the light-emitting ll start request starts to emit light, and the light emission is stopped in response to the request to stop emitting light. 图5示出光发射装置11的结构。 Figure 5 shows the structure of the light emitting device 11. 如图5所示,装置11包含一光发射部分21、开关22和23、电容器24和电源25。 5, the apparatus 11 comprises a light emitting section 21, switches 22 and 23, capacitor 24 and power supply 25. 例如,光发射部分21为氙(Xe)灯并且在被提供了驱动电流时发射光。 For example, the light emitting portion 21 as xenon (Xe) lamp and emits light when drive current is supplied. 开关22将电容器24 连接到光发射部分21、而开关23将电源25连接到电容器24。 Switch 22 the capacitor 24 is connected to the light emitting portion 21, the power supply 25 and the switch 23 is connected to a capacitor 24. 所提供的电容器24用来驱动光发射部分21。 A capacitor 24 provided for driving the light emitting portion 21. 所提供的电源25用来给电容器24提供电源。 Provided by the power supply 25 to provide power to the capacitor 24. 光发射装置ll还包含用于提供控制信号的一控制部分(未示出),该控制部分控制开关22和23。 Ll light emitting device further comprises a control section for providing a control signal (not shown), the control section controls the switches 22 and 23.

下面将解释如此构成的光发射装置ll如何操作。 Light-emitting device will be explained how to operate ll thus constituted. 首先,所述控制部分 First, the control section

(未示出)响应于一光发射启动请求而产生的控制信号提供给开关22,于是 (Not shown) in response to a control signal light emission start request is supplied to the switch 22, so

开关22将电容器24连接到光发射部分21。 Switch 22 the capacitor 24 is connected to the light emitting portion 21. 于是, 一电压从电容24施加到光 Thus, a voltage is applied to the light from the capacitor 24

发射部分21。 Emitting portion 21. 为使光发射部分21停止发射光,所述控制部分(未示出)响应 In order to stop the light emitting portion 21 emits light, the control section (not shown) in response to

于一光发射停止请求而产生的控制信号提供给开关22,于是开关22将电容 Control signal to a light emission stop request is supplied to the switch 22, then switch 22 capacitor

器24与光发射部分21断开。 24 and the light emitting portion 21 is disconnected. 结果,电压不再加到光发射部分21。 As a result, the voltage is no longer applied to the light-emitting portion 21.

当电容器24随着光发射部分21发射光而放电,或者当光发射装置ll通电时,电容器24必须被充电。 When the capacitor 24 as the light emitting portion 21 emits light discharge, or when the light-emitting device ll energized, capacitor 24 to be charged. 为对电容器24充电,控制信号从所述控制部分(未示出)提供给开关23,切换开关23,以将电源25连接到电容器24。 24 for the capacitor charging control signal from the control section (not shown) to the switch 23, the switch 23 to the power supply 25 is connected to the capacitor 24. 所述控制部分(未示出)监视电容器24如何被充'电。 The control section (not shown) to monitor how the capacitor 24 to be charged 'electricity. 当电容器24完全充电时, 开关23进行切换,将电源25与电容器24断开。 When the capacitor 24 is fully charged, the switch 23 is switched to disconnect the power supply 25 and the capacitor 24.

在具有上述具体结构的光发射控制系统中,微处理器单元10从光接收单元2输出的积分值中产生一光发射停止请求。 In the light emission control system having the above specific structure, the microprocessor unit 10 generates a light emission stop request from the light receiving unit integrated value output. 如此产生的光发射停止请求提供给光发射装置ll,使装置ll停止发射光。 Light emission stop request thus generated is supplied to the light emitting device ll, ll stop of the device emitting light.

下面将详细描述如何按照光接收单元2的输出控制光发射装置11以及光接收单元2的输出增益如何被控制。 The following will describe in detail how the control according to the output of the light receiving unit 2 light emitting device 11 and a light receiving unit 2 how the output of the gain is controlled.

如下面所述的,按照光接收单元2的输出控制光发射装置11 。 As described below, in accordance with the output of the light receiving unit 2 controls a light-emitting device 11.

图6示出当光接收单元2在光发射装置11开始发射光后接收来自光发射装置ll的光时,直到光发射装置ll停止发射光,光接收单元2的输出电压V2 如何随时间变化。 Figure 6 shows the light receiving unit 2 when the light emitting device 11 starts receiving the light from the light emitting device emits light after ll, ll stop until the light emitting means to emit light, the light receiving unit 2 how the output voltage V2 changes over time.

如从图6所看到的,当光发射装置ll开始发射光时,输出电压V2突然升高。 As seen from Fig. 6, when the light-emitting device ll begin to emit light, a sudden increase in the output voltage V2. 随着时间的推移,从摄像目标反射的光下降,并且输出电压V2下降。 Over time, the light reflected from the imaging target decreases, and the output voltage V2 drops.

当以这种方式变化的输出电压V2的积分值到达参考值时,控制部分9在光发射脉沖的后沿输出一光发射停止请求,如图7B所示。 When the integrated value of the change in this way the output voltage V2 reaches the reference value, the control portion 9 after the light emission pulse emitted along an optical output stop request, shown in Figure 7B. 一旦接收到该光发射停止请求,则光发射装置ll停止发射光。 Upon receiving the request to stop the light emission, the light emitting means to stop emitting light ll. 控制部分9以下列方式产生光发射停止请求。 The control section 9 in the following manner to generate light emission stop request. 首先,A/D转换部分6将光接收单元2的输出电压V2转换为数字数据。 First, A / D conversion section to the light receiving element 6 outputs a voltage V2 2 are converted into digital data. 然后,积分部分7对该表示输出电压V2的数字数据进行积分,从而产生一积分值。 Then, the integrating section 7 represents the digital data by integrating the output voltage V2, thereby producing an integrated value. 比较部分8将该积分值与参考值进行比较。 The integrated value comparing section 8 is compared with the reference value. 控制部分9根据由比较部分8执行的比较结果产生一光发射停止信号。 The control section 9 based on the comparison performed by the comparison section 8 produces a light emission stop signal. 在光接收单元2响应于光发射停止请求而停止发射光之后,光接收单元2的输出电压V2改变,如图7A所示。 In the light receiving unit 2 in response to the request to stop the light emission stop emitting light after the light reception output voltage V2 change unit 2, shown in Figure 7A.

如上所述,比较部分8将积分值与参考值进行比较,并且光发射装置ll 根据比较的结果停止发射光。 As described above, the integrated value comparing section 8 is compared with a reference value, and the light emitting means ll stop emitting light based on the result of the comparison. 由于利用了光接收单元2接收的光的总量的数字数据,能够以高精度控制光发射装置ll。 Since the use of the total amount of digital data received by the light receiving unit 2 of the light, it can be controlled with high precision light emitting device ll.

以下列方式控制光接收单元2的增益。 In the following manner to control the gain of the light receiving unit 2.

根据光接收单元2接收的光强度,光接收单元2的输出电压V2可能会饱和。 The light intensity received by the light receiving unit 2, the light reception output voltage V2 unit 2 may be saturated. 例如,输出电压V2不会升高到某一电平之上,如图8所示。 For example, the output voltage V2 does not rise above a certain level, as shown in FIG. 当从目标反射的光非常强时(比如在宏摄像的情况下)就会发生这种情况。 When the light reflected from the target is very strong when (as in the case of macro imaging) will happen. 当光接收单元2的输出饱和时,不能升高到特定电平之上,于是积分部分7不可能获得正确的积分值,即单元2接收的光的总量。 When the output of the light receiving unit 2 is saturated and can not be raised to a specific level above the integrating section 7 can not be obtained so the correct integral value, i.e., the total amount of unit 2 receives the light. 因此,光发射装置ll不能被控制停止发射光。 Thus, the light emitting device can not be controlled ll stop emitting light.

因此,光接收单元2的输出需要被防止饱和。 Thus, the output of the light receiving unit 2 needs to be prevented saturation. 为达到此目的,开关5闭合,将电阻器4接地。 For this purpose, the switch 5 is closed, the resistor 4 to ground. 于是,光接收单元2的输出增益降低。 Thus, the light receiving output of the gain unit 2 is reduced. 这就防止了光接收单元2的输出电压的饱和。 This prevents the output voltage of the light-receiving unit 2 saturation.

当微处理器单元10控制开关5时,可控制单元2的输出增益。 When the microprocessor unit 10 controls the switch 5, the control unit can output gain 2.

例如,按照可估计到的从目标反射的光强度的各种数据项,电阻器4连接到地和与地断开,从而控制单元2的输出增益,以防止单元2的输出的饱和。 For example, according to various data items can be estimated from the reflection of the target light intensity, the resistor 4 is connected to and disconnected from the ground to the ground, so that the control unit 2 outputs the gain to prevent saturation of the output unit 2. 在这些数据项中,有:到目标的距离、光圈开口、曝光灵敏度、光发射装置ll的闪光指数,等。 Among these items, there are: the distance to the target, aperture opening, exposure sensitivity, light emitting device ll flash index, and so on.

由于光接收单元2的输出增益可被选择,因而光接收单元2的输出不会饱和。 Since the output of the light receiving unit 2 of the gain may be selected, so that the output of the light receiving unit 2 is not saturated. 因此,积分部分7总能获得积分值。 Therefore, the integral part 7 always get the integral value.

如上所述,实际上,即使光接收单元2的输出饱和,也能控制从装置ll 发射光。 As described above, in fact, even if the output of the light receiving unit 2 is saturated, but also the light emitted from the device can be controlled ll. 然而,如在本发明中那样,通过降低单元2的输出增益以防止单元2的输出饱和,能够以高精度控制光的发射。 However, as in the present invention that, by reducing the output of the gain unit 2 in order to prevent saturation of the output unit 2, can be controlled with high precision light emission.

光接收单元2的输出增益不需要总在事先被选择,以防止单元2的输出饱和。 Light reception output gain unit 2 does not need to always be selected in advance, in order to prevent saturation of the output unit 2. 可替代的是,也可根据单元2的输出电压选择适当增益。 Alternative is, and can be appropriately selected based on cell output voltage gain of 2. 例如,如果积分部分7输出的积分值趋向于增加得太快,并因此可预测出单元2的输出将饱和,则可控制开关5以选择适当增益。 For example, if the integral part of the integral value 7 output tends to increase too quickly, and thus can predict the output unit 2 will be saturated, it can control the switch 5 to select the appropriate gain.

用于选择光接收单元2的输出增益的电阻器3和4可由可变电阻器来替代。 For selecting the output of the gain of the light receiving unit 2 and the resistor 3 4 replaced by a variable resistor. 如果是这种情况,则可将输出增益连续改变到任何想要的值。 If this is the case, you can continuously change the output gain to any desired value.

此外,控制部分9可在光发射装置11开始发射光之后经过规定时间时产生光发射停止请求,从而使光发射装置ll停止发射光。 In addition, the control section 9 generates light emission stop request after a predetermined time after the apparatus 11 starts emitting light can emit light, so that the light-emitting device ll stop emitting light. 如果是这种情况, 即使光接收单元2接收的光的总量没有达到预定值,也就是说,即使积分值没有达到参考值,光发射装置11可响应于当规定时间过去时产生的光发射 If this is the case, even if the total amount of light received by the light receiving unit 2 does not reach a predetermined value, that is, even if the integration value does not reach the reference value, the light emitting device 11 may be responsive to the light generated when a predetermined time elapses emission

停止请求而被强迫停止发射光,如图9所示。 Stop request is forced to stop emitting light, as shown in Figure 9.

在光接收单元2的输出电平太低而不能实现适当控制光的发射的情况下,例如,如果单元2的输出电平由于从目标反射的光很弱(由于离目标的距离很长)而很低,同时单元2的输出增益保持很小时,终止从装置ll发射光的方法是很有用且很有效的。 The case where the output of the light receiving unit 2 in the level is too low to achieve adequate control of the light emitted, for example, if the output level of cell 2 due to the light reflected from the target is weak (due to long distance from the target) and is low, while the output unit 2 gain remains very small, termination method ll light emitted from the device is useful and very effective.

根据光发射装置ll的操作特性等确定所述规定时间,在该规定时间过去后控制部分9产生一光发射停止请求。 According to determine the operating characteristics of the light-emitting device, etc. ll of the predetermined time, the predetermined time has elapsed after the control section 9 generates a light emission stop request. 例如,根据上面已经提到的到目标的距离、光圈开口、曝光灵敏度、光发射装置ll的闪光指数等确定所述规定时间。 For example, already mentioned above, the distance to the target, aperture opening, exposure sensitivity, the light-emitting device ll flash index determining the predetermined time.

除非积分值达到参考值,否则在规定时间过去时光发射装置11会停止发射光。 Unless the integral value reaches the reference value, or at a predetermined time has elapsed time transmitting device 11 stops emitting light. 因此,如上所述,即使为光接收单元2选择的输出增益不足并且单元2的输出电平不可避免地变得太低,装置ll也会停止发射光。 Thus, as described above, even if the light receiving unit 2 to select the output of the gain unit and the output level of less than 2 inevitably becomes too low, ll means stops emitting light.

如上面所描述的,光接收单元2的输出控制从光发射装置11发射光。 As described above, the light receiving unit 2 controls the output from the light emitting device 11 to emit light. 此外,可以为单元2选择适当的输出增益,以使单元2可产生所需电平的输出。 In addition, you can select the appropriate output gain 2 as a unit, so that the unit 2 can produce a desired level of output. 下面将参照图10的流程图详细解释这些操作过程。 These procedures will now be explained in detail with reference to a flowchart of operation 10 of FIG.

首先,在步骤S1,为光接收单元2选择输出增益。 First, at step S1, the light receiving unit 2 to select the output gain. 更具体地讲,开关5 将电阻器4连接到地,或者将其从地断开,从而改变光接收单元2的输出电平到最好的可能的值。 More specifically, the switch 5 to the resistor 4 is connected to ground, or disconnect it from the ground, thereby changing the light-receiving unit 2 output level to the best possible value.

继续选择所述输出增益,直到在步骤S 2判断出一光发射请求已产生。 Continue to select the output gain until judged in step S 2 has generated a light emission request. 因此,根据刚好在产生光发射请求之前要求的数据,例如到目标的距离等,来确定光接收单元2的输出增益。 Thus, according to the light emission produced just before requesting the required data, such as distance to the target, to determine the gain of the output of the light receiving unit 2.

在已检测到所述光发射请求并且单元2已得到所选的输出增益之后,在步骤S3清除积分部分7中的积分值。 After having detected the light emission request and Unit 2 has been selected output gain, in step S3 to clear integral value of the integrating portion 7. 在步骤S4,光发射装置ll发射光。 In step S4, the light emitting device emits light ll.

也就是说,光发射装置ll响应于光发射启动请求而开始发射光。 That is, the light-emitting device in response to the light-emitting ll start request starts emitting light. 在步骤S5,光接收单元2的输出电压转换为数字值。 In step S5, the light receiving unit 2 converts the output voltage to a digital value. 在步骤S6,积分部分7开始对输出电压进4亍积分。 In step S6, the integral part of the output voltage of 7 starts right foot into 4 points.

在下一步骤,即步骤S7,判断积分部分7计算的积分值是否已到达参考值。 In the next step, i.e. step S7, it is determined whether the calculated integrated value integrating section 7 has reached the reference value. 如果积分值已到达参考值,则操作流程进到步骤S9。 If the integration value has reached the reference value, the operational flow proceeds to step S9. 如果积分值尚未到达参考值,则操作流程进到步骤S8。 If the integrated value of the reference value has not been reached, the operational flow proceeds to step S8.

在步骤S8,判断从光发射装置开始发射光起是否已过去规定时间。 In step S8, to judge from the light-emitting device starts emitting light from whether a predetermined time has elapsed. 如果已过去了规定时间,则操作流程进到步骤S9。 If the predetermined time has elapsed, the operational flow proceeds to step S9. 如果规定时间尚未过去, 则操作返回步骤S5,并且重复步骤S5到S7,从而处理数字数据。 If the predetermined time has not elapsed, the operation returns to step S5, and repeats steps S5 to S7, thereby processing the digital data.

在步骤S9,控制部分9向光发射装置11发出一光发射停止请求。 At step S9, the control section 9 to the light emitting device 11 emit a light emission stop request.

如果在步骤S7判断出积分部分7计算的积分值已到达参考值,或者,如果在步骤S8判断出尽管积分值尚未到达参考值但已过去了规定时间,则对光发射装置ll发出一光发射停止请求。 If it is determined in step S7 integral integral value calculation section 7 has reached the reference value, or, if it is judged in spite of the integration value has not yet reached the reference value but a predetermined time has elapsed in step S8, the light emitting device emit a light emitting ll stop request. 另一方面,如果积分值尚未到达参考值并且规定时间尚未过去,则积分部分7将继续对光接收单元2的输出值积分,即对A/D转换部分6输出的数字数据积分。 On the other hand, if the integrated value of the reference value has not been reached and a predetermined time has not elapsed, then the light will continue to be the integral part 7 receives the output value of the integral unit 2, i.e., the A / D conversion section 6 outputs digital data points.

在步骤S9发出光发射停止请求之后,在步骤S10保持由积分部分7计算的积分值。 After issuing a request to stop the light emission in the step S9, in step S10 the integral value holding portion 7 integral calculation. 在步骤Sll,光发射装置ll响应于所述光发射停止请求而停止发射光。 In step Sll, the light-emitting device in response to the light-emitting ll stop request to stop emitting light.

然后,在步骤S12,比较部分8将所述积分值与参考值进行比较,从而求出这些值之间的差值。 Then, at step S12, the comparing section 8 the integrated value is compared with a reference value, thereby obtaining a difference between these values. 该差值是基于光接收单元2已接收的光量的数据。 The difference is based on the amount of light of the light receiving unit 2 has received data.

如上所述,为光接收单元2选择一输出增益,并且按照表示从光接收单元2输出的电压的积分值的数字数据来控制光发射装置11 。 As described above, the light receiving unit 2 to select an output gain, and in accordance with digital data representing an integrated value of the voltage output from the light receiving unit 2 to control the light emitting device 11.

如上所述,在步骤S12获得的数据是基于单元2已接收的光量的数据。 As described above, the data obtained in step S12 is the amount of light received data unit 2 based. 该数据(称为光数据)可被用于执行下面将描述的处理。 The data (referred to as light data) may be used to perform the processing described below.

包含光发射装置11的摄像机设备的用户可在镜头盖被盖上的情况下按压快门按钮,使装置ll发射光以进行闪光灯摄像。 The user includes the camera device light-emitting device 11 may be pressing the shutter button with the lens cover is covered, so that means ll emit light for flash camera. 假如镜头盖也盖住光接收单元2,则可检测到这种错误。 If the lens cover also cover the light-receiving unit 2, such an error can be detected. 可以通过读取光接收单元2的输出来检测这种错误。 Can output light receiving unit 2 detects such an error by reading. 然而,仅仅从光接收单元2的输出还不能检测到所述错误。 However, only the output of the light receiving unit 2 can not be detected from the error. 单元2的输出不能用来确定是镜头盖被盖上还是摄像机设备用在黑暗的地方以及存在反射很小的目标。 Output unit 2 can not be used to determine the lens cap or camera equipment was covered in a dark place and the presence of small reflective target. 鉴于此,在本发明中将积分值与参考值进行比较, 找出单元2已接收的光量。 In view of this, in the present invention will be integrated value is compared with a reference value, to identify the amount of light received unit 2. 从上述的比较中,可以可靠地判断镜头盖是否被盖上。 From the above comparison, it can reliably determine the lens cover is covered.

利用本发明,还能够利用光数据来修改图像。 With the present invention, it is also possible to modify the image data using light. 更具体地讲,如果积分值尚未达到参考值,则判断光发射装置ll已发光但光量不足。 More specifically, if the integrated value has not reached the reference value, it is determined that the light-emitting device has a light emitting ll but insufficient light. 在这种情况下,可以推断从目标反射的光不是足够强,并且采取措施来修改图像。 In this case, the target can be inferred from the reflected light is not strong enough, and take steps to modify the image. 而且,当光量不足时,还可从光数据产生一警报。 Moreover, when there is insufficient light quantity, but also generate an alarm from optical data. 因此,摄像机设备的用户可知道光发射装置ll没有将足够量的光加到目标。 Thus, the user can know that the camera device light emitting device ll not be a sufficient amount of light applied to the target. 此外,还能够按照积分值比参考值小多少来修改图像和产生警报。 In addition, it can be used to modify the image and generates an alarm in accordance with the integral value much smaller than the reference value.

此外,可将光数据附加到表示摄像目标的图像数据。 In addition, optical data can be appended to the image data representing an imaging target. 然后,所附加的数据不仅能用来修改图像,还能用来完成其它处理。 Then, the additional data can not only be used to modify an image, it can also be used to complete the other treatments.

光数据不仅仅是可以在向光发射装置ll发出光发射停止请求时被获取。 Optical data can be acquired not only when making a request to stop the light-emitting light-emitting device ll. 积分值数据可在没有做出光发射停止请求时的任何时间从积分部分7读 The integral value of data can be made at any time, no light emission stop the read request from the integral part 7

取。 Take. 此外,如图ll所示,A/D转换部分6可在任何时间将光接收单元2的输出转换为数字数据(步骤S21),然后,可在任何时间从A/D转换部分6读出数字数据(步骤S22)。 In addition, as shown in FIG. Ll, A / D conversion section 6 receives the output light can be converted into digital data unit 2 (step S21) at any time, then, can be converted section 6 reads the numbers from the A / D at any time data (step S22).

A/D转换部分6从光接收单元2的输出中产生的数字数据可以总是提供给微处理器单元IO。 A / D conversion section 6 generates the digital data output from the light receiving unit 2 can be always supplied to the microprocessor unit IO. 因此,单元10可将入射到单元2的光的强度作为一个数据项。 Thus, unit 10 may be incident to the intensity of the light unit 2 as a data item.

在可用的各种摄像机设备中,有的是具有液晶显示器并且能够在该液晶显示器上记录图像和再现图像的视频摄像机。 In various cameras available devices, some having a liquid crystal display and capable of recording and reproducing an image on a video camera image of the liquid crystal display. 视频摄像机可包括本发明的光发射控制设备。 Video cameras may include a light emission control device of the present invention. 如果是这样,例如,可在播放记录图像的过程中按照表示视频摄像机接收的光量的数据来调节液晶显示器的背光。 If so, for example, during playback of recorded images in accordance with the data indicates the amount of light received by the video camera to adjust the backlit LCD display.

此外,根据所述光数据,可判断包括光接收单元2的光发射控制设备的各部件是否在正常操作。 Further, according to the optical data, can determine various light emitting member of the light receiving unit 2 of the control apparatus includes whether the normal operation.

如上面所指出的,万一光接收单元2的输出增益为低,由此会在规定时间过去时输出一光发射停止请求,因为积分值尚未到达参考值。 As noted above, the light receiving output in case of a low gain unit 2, thereby outputting a light emission will stop request at a predetermined time past, because the integral value has not reached the reference value. 如果在规定时间过去时停止光的发射,则这种事件可用作光数据。 If the stop light is emitted in a specified time in the past, then this event can be used as optical data.

由上可知,可以说本发明有下列几方面的优点。 From the foregoing, it can be said of the present invention has the following several advantages.

由于处理的数据是由A/D转换部分6产生的数字数据,则控制光发射的精度可大大高于传统的光发射控制系统。 Because the data is processed by the A / D conversion section 6 generates the digital data, the accuracy of the control of light emission can be much higher than conventional light emission control systems.

用于所接收光量的参考值、当规定时间过去时产生光发射停止请求的该规定时间等,可通过软件方式而容易地改变。 Reference value for the amount of light received, the light emission time predetermined stop request is generated when a predetermined time has elapsed, etc., can be easily changed by software. 因此,可根据摄像机设备使用的状态来设置控制值。 Therefore, the control value can be set according to the state camera device. 换言之,提高了控制光发射装置ll的自由度。 In other words, to improve the control of the light emitting device ll freedom.

由于几乎所有的处理部分都处理数字数据,这些部分可包含在单一的处理单元LSI(大规模集成电路)中,因而可以低成本提供。 Since almost all of the digital data processing section are processed, these parts may be contained in a single processing unit LSI (Large Scale Integrated Circuit), which can be provided at low cost. 因此,能够比在传统的光发射控制系统中使用更少的模拟处理部件(例如,用于将电容器的输出值与参考值比较的比较器)。 Therefore, it is possible to use fewer than in the conventional light emission control system analog processing section (e.g., the output value of the capacitor for comparison with the reference value in the comparator). 因此,能够以低成本制造本发明的系统。 Thus, at low cost manufacturing system of the present invention. 当光接收单元2接收很强的光时,其输出可能会饱和。 When the light-receiving unit 2 receives strong light, the output may be saturated. 在本发明的系统中,如果单元2接收强光,则切换单元2的输出增益,从而防止单元2的输出饱和。 In the system of the present invention, if the unit 2 receives strong light output gain switching unit 2, thereby preventing the output unit 2 saturation. 此外,可按照如此切换的输出增益来控制光的发射。 In addition, in accordance with such a switchable output gain control of the emitted light.

装置ll是否发射光。 Ll means whether light is emitted. 因此,能够判断单元2正从外部接收的光强度。 Accordingly, the light intensity can be determined unit being received from an external 2. 如此确定的表示光强度的数据可用来作为控制摄像机设备的一个数据项。 So determined is the light intensity data can be used to control the camera device as a data item.

可以提供以与摄像机设备分离的设备形式存在的光发射控制系统。 It may be provided in the form of separate facilities and the presence of the camera device light emission control systems. 然后,可将光发射控制系统与使用照相胶片的静止照相机结合使用。 Then, the light can be used in combination with the use of emission control systems photographic film still camera.

这里所描述的本发明的实施例是光发射控制系统。 Embodiments of the invention described herein is a light emission control systems. 毋需多言,本发明可应用于包含这种光发射控制系统的摄像机设备。 No need to say, the present invention can be applied to such a light emitting device includes the camera control system. 本发明的摄像机设备可包含光接收单元2、电阻器3和4、 A/D转换部分6、积分部分7、比较部分8、 控制部分9和MPU 10。 Camera apparatus of the present invention may comprise the light receiving unit 2, resistor 3 and 4, A / D conversion section 6, the integral portion 7, comparing section 8, the control section 9 and the MPU 10.

光接收单元2产生相应于其所接收的光量的电流。 The light receiving unit 2 generates light corresponding to the amount of current it receives. A/D转换部分6将该电流转换为数字数据。 A / D conversion section 6 converts the current into digital data. 积分部分7对该数字数据积分,从而产生与单元2已接收的光量相当的积分值。 7 integral part of the digital data points, resulting in the cell corresponding to the light amount integrated value 2 has been received.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US486010828 Dec 198722 Aug 1989Minolta Camera Kabushiki KaishaImage sensing device for an electronic still camera
US58390052 Jun 199717 Nov 1998Canon Kabushiki KaishaFlash photographing system
Classifications
International ClassificationG03B7/16, H05B41/32, G03B7/091, G05D25/02, G03B15/05
Cooperative ClassificationH05B41/325, G03B15/05, G03B2215/05
European ClassificationH05B41/32B, G03B15/05
Legal Events
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9 Aug 2000C06Publication
30 May 2001C10Request of examination as to substance
20 May 2009C14Granted
27 Mar 2013C17Cessation of patent right