CN104252842A - LED (Light Emitting Diode) display screen module with separated lamp boards and driving boards - Google Patents
LED (Light Emitting Diode) display screen module with separated lamp boards and driving boards Download PDFInfo
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- CN104252842A CN104252842A CN201410476995.9A CN201410476995A CN104252842A CN 104252842 A CN104252842 A CN 104252842A CN 201410476995 A CN201410476995 A CN 201410476995A CN 104252842 A CN104252842 A CN 104252842A
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Abstract
The invention discloses an LED (Light Emitting Diode) display screen module with separated lamp boards and driving boards. The LED display screen module comprises a circuit board, wherein the circuit board comprises a plurality of groups of LED lamp boards and a plurality of groups of driving boards, which are matched and connected mutually; each module comprises the plurality of groups of LED lamp boards and the plurality of driving boards, which are matched and connected mutually, and the large module is divided into a plurality of independent display units, so that signal interfaces and power supply interfaces can be more accurately butted; a PIN needle is not easy to bend and break and the connectedness of signals is enhanced; the frame loss rate of signal transmission is reduced and the time consumed in a module mounting process is reduced; meanwhile, the heat dissipation effect is further enhanced.
Description
Technical field
The invention belongs to electronics applications field, be specifically related to the LED display module that a kind of lamp drives separation.
Background technology
LED full-color display screen board design aspect is generally lamp plate and drive plate composition.Have two kinds of design proposals on the market at present, one is that lamp plate and drive plate are separated into two circuit boards, and one is that lamp plate and drive plate are combined in one piece of circuit board top.
LED display lamp is distinguished from being exactly that LED and driving chip be not on same pcb board.Actual conditions are, the pcb board of welding LED is connected by row array with the pcb board of welding driving chip.Consider the factor such as dot spacing, size, heating, the module of below P12 all adopts lamp to drive the method for separation substantially.From the angle of maintenance, the module ratio that lamp drives separation is easier to maintenance.
LED is driven unification and LED and driving chip and is welded on same pcb board.Thus one of its advantage can greatly reduce the use of pcb board exactly.Also clearly, lamp drives the heat problem that unification produces and not yet can solve so far its shortcoming, and maintenance is also inconvenient.Usually can adopt in such a way at the module of more than P16, but application is not at present very desirable.So lamp drives the concept what advanced person unification is not at present.
The utility model patent of Shenzhen Zhouming Technology Co., Ltd., the LED that lamp drives separation shows module, application number: 201020561487.8, the applying date: on October 14th, 2010, this utility model discloses the LED display module that a kind of lamp drives separation, comprise LED lamp panel, be fixed on multiple LED in described LED lamp panel and a driving PCB plate spaced with described LED lamp panel, between described LED lamp panel and described driving PCB plate, realize electrical connection by conduction element.This utility model is by being separated setting by driving PCB plate with LED lamp panel, the area of dissipation between LED lamp panel and driving PCB plate can be increased, thus can not only heat dispersion be improved, effectively can also improve the serviceable life of LED, simultaneously relative to the existing wiring density by the circuit board of driving PCB plate and LED lamp panel integrated setting, the wiring density of the utility model circuit board also reduces greatly, therefore also reduces the design cost of wiring density.
Although this utility model efficiently solves heat dissipation problem; but module area is too large; lamp plate and drive plate are linked together by many group row pins; these row's pins are connected in the process of installation the problem that often there will be contraposition skew; the row's of causing pin bending, is not easy to install, simultaneously; many groups row array connects, and easily produces the phenomenon of loose contact.
The bright sub-display screen module of LED electrical be separated with driving with a kind of light source of the utility model patent of optoelectronic device company limited in Hunan, application number: 201320597562.X, the applying date: on 09 27th, 2013, this utility model discloses a kind of light source and drives the sub-display screen module of LED electrical be separated, comprise module group unit shell, pcb board, LED luminescence chip, PIN needle, drive plate and drive motor, described module group unit case surface aligned transfer has light hole, described pcb board front aligned transfer LED luminescence chip, dorsal edge assigns PIN needle, pcb board is connected with drive plate by PIN needle, drive plate is connected with drive motor.By adopting lamp to drive separate design scheme, reducing module group unit working temperature, having delayed LED light and declined, improve the antidetonation of LED display module, dustproof and waterproof ability, being adapted to the sub-display screen of LED electrical of family, inside and outside all size.
The technical scheme employing of this utility model arranges PIN needle at pcb board edge and is connected with drive plate, and can produce loose contact equally, PIN needle contraposition easily produces deviation, PIN needle is fractureed, like this, enhance the installation difficulty of module, be also not easy to keep in repair display screen.
Summary of the invention
Technical matters to be solved by this invention is: provide the LED display module that a kind of lamp drives separation, solves existing lamp and drives separation module unit volume greatly, and application row pin many easily rows of causing pin is bending to fracture, the phenomenon of loose contact.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of lamp drives the LED display module of separation, comprise circuit board, described circuit board comprises the LED lamp panel cooperatively interacting and connect, drive plate, described LED lamp panel, drive plate is many groups, wherein every evenly distributed some LED in front of LED lamp panel in group, the back side of LED lamp panel arranges the first signaling interface, first power interface, often in group, the front of drive plate arranges secondary signal interface, second source interface, the back side of drive plate arranges LED drive IC, signal input port, signal output port, power input port, described first signaling interface is connected with secondary signal Interference fit, described first power interface is connected with second source Interference fit, described signal input port respectively with the signal input pin of LED drive IC, signal output port connects, the signal output pin of LED drive IC is connected with secondary signal interface, first signaling interface is connected with the control pin of LED, power input port respectively with second source interface, the supply pin of LED drive IC connects, first power interface is connected with the supply pin of LED, the control signal of external control system transfers to secondary signal interface and signal output port by signal input port, then transfer to through the first signaling interface the work that LED lamp panel controls LED, next stage LED display module is transferred to through signal output port, external power source transfers to second source interface by power input port, then, transferring to LED lamp panel through the first power interface is that LED is powered, simultaneously for LED drive IC is powered.
Also comprise line scanning control IC, row cutting IC, phase inverter, signal power amplification IC, described line scanning control IC controls LED and lights successively line by line, a line LED is only had to be in illuminating state in the same time, described row cutting IC provides electric current for the LED that often row is lighted, described phase inverter is for signals reverse for line scanning control IC provides low level or high level, and signal power is amplified IC and is used for the power amplification of LED control signal, shaping.
Described line scanning control IC is 74HC138, and described row cutting IC is APM4953, and described phase inverter is 74HC04, and it is 74HC245 that described signal power amplifies IC.
Described LED drive IC is the one in MBI5024, MBI5042, MBI6024.
Described signal input port, signal output port all adopt the double cattle horn socket of 2*10P.
The principle of this invention is as follows:
By the display unit being divided into several little original module, each unit comprises a signaling interface and a power interface, when installing only need the signaling interface between LED lamp panel with drive plate and power interface to dock, the seamless link of LED lamp panel and drive plate can be completed, signal is by the input of total input port, then be divided into multiple signals and input to each LED drive board, then control the work of LED.
Compared with prior art, the present invention has following beneficial effect:
1, every block module comprises many groups of the cooperatively interact LED lamp panel, the drive plates that connect, large module is divided into independently multiple display unit, can be more accurate time signaling interface, power interface are docked, PIN needle is not easy bending fractureing, enhance the connectedness of signal, the frame loss rate of Signal transmissions reduces, and decreases the time consumed in module installation process, further enhances radiating effect simultaneously.
2, line scanning control IC, row cutting IC, phase inverter, signal power amplify IC, when making this module gated sweep display screen, signal transfer rate is high, the phenomenon reducing the sudden strain of a muscle screen because signal transmission effect difference causes or spend screen, enhance reliability, improve the serviceable life of display screen.
3, according to the chip portfolio that the collocation of different demands is optimum, make the performance of display screen reach best, while effectively completing display demand, reduce the cost of whole display screen.
4, select different LED drive IC according to different demands, effectively consider the combination of performance and cost, the cost performance of maximized raising display screen, realizes the doulbe-sides' victory of producer and user.
Accompanying drawing explanation
Fig. 1 is the Facad structure block diagram of LED lamp panel of the present invention.
Fig. 2 is the structure block diagram of LED lamp panel of the present invention.
Fig. 3 is the Facad structure block diagram of drive plate of the present invention.
Fig. 4 is the structure block diagram of drive plate of the present invention.
Wherein, being designated in figure: the front of 1-LED lamp plate; The back side of 2-LED lamp plate; 3-LED lamp; 4-first signaling interface; 5-first power interface; The front of 6-drive plate; The back side of 7-drive plate; 8-secondary signal interface; 9-second source interface; 10-LED lamp drive IC; 11-signal input port; 12-power input port; 13-signal output port.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention and the course of work are described further.
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, a kind of lamp drives the LED display module of separation, comprise circuit board, described circuit board comprises the LED lamp panel cooperatively interacting and connect, drive plate, described LED lamp panel, drive plate is many groups, wherein every evenly distributed some LED 3 in front 1 of LED lamp panel in group, the back side 2 of LED lamp panel arranges the first signaling interface 4, first power interface 5, often in group, the front 6 of drive plate arranges secondary signal interface 8, second source interface 9, the back side 7 of drive plate arranges LED drive IC 10, signal input port 11, signal output port 13, power input port 12, described first signaling interface 4 is connected with secondary signal interface 8, described first power interface 5 is connected with second source interface 9, described signal input port 11 respectively with the signal input pin of LED drive IC 10, signal output port 13 connects, the signal output pin of LED drive IC 10 is connected with secondary signal interface 8, first signaling interface 4 is connected with the control pin of LED 3, power input port 12 respectively with second source interface 9, the supply pin of LED drive IC 10 connects, first power interface 5 is connected with the supply pin of LED, the control signal of external control system transfers to secondary signal interface 8 and signal output port 13 by signal input port 11, then transfer to through the first signaling interface 4 work that LED lamp panel controls LED, next stage LED display module is transferred to through signal output port 13, external power source transfers to second source interface 9 by power input port 12, then, transferring to LED lamp panel through the first power interface 5 is that LED 3 is powered, power for LED drive IC 10 simultaneously.
Every block module comprises many groups of the cooperatively interact LED lamp panel, the drive plates that connect, large module is divided into independently multiple display unit, can be more accurate time signaling interface, power interface are docked, PIN needle is not easy bending fractureing, enhance the connectedness of signal, the frame loss rate of Signal transmissions reduces, and decreases the time consumed in module installation process, further enhances radiating effect simultaneously.
Also comprise line scanning control IC, row cutting IC, phase inverter, signal power amplification IC, described line scanning control IC controls LED and lights successively line by line, a line LED is only had to be in illuminating state in the same time, described row cutting IC provides electric current for the LED that often row is lighted, described phase inverter is for signals reverse for line scanning control IC provides low level or high level, and signal power is amplified IC and is used for the power amplification of LED control signal, shaping.
Line scanning control IC, row cutting IC, phase inverter, signal power amplify IC, when making this module gated sweep display screen, signal transfer rate is high, the phenomenon reducing the sudden strain of a muscle screen because signal transmission effect difference causes or spend screen, enhance reliability, improve the serviceable life of display screen.
Described line scanning control IC is 74HC138, and described row cutting IC is APM4953, and described phase inverter is 74HC04, and it is 74HC245 that described signal power amplifies IC.
74HC138 plays the effect that row is selected to control in LED display module, and 74HC138 is a high-speed cmos device, 74HC138 pin compatibility low-power consumption Schottky TTL(LSTTL) series.
74HC138 code translator can accept 3 binary weighting addresses input (A0, A1 and A2), and when enabled, provides low effective output (Y0 to Y7) of 8 mutual exclusions.Peculiar 3 the enable input ends of 74HC138: two low effectively (E1 and E2) and one high effective (E3).Unless E1 and E2 sets low and E3 sets high, otherwise all for maintenance output is high by 74HC138.Utilize the enable characteristic of this compound, only need 4 74HC138 chips and 1 phase inverter, easily can realize parallel-expansion, be combined into a 1-32(5 line to 32 lines) code translator.An optional low effective enable input end inputs as data, and using remaining enable input end as gating end, then 74HC138 also can serve as 8 output multi-channel dividers, and untapped enable input end must keep being bundled in the effective or low effective status of height suitable separately.
74HC04 is 6 bit Inverting devices, and so-called anti-phase constrained input is in other words just contrary level, if it is exactly low level that input high level exports, A is input end, and O is output terminal.1,2 pin are one group, and 3,4 pin are one group, and 5,6 pin are one group, and 8,9 pin are one group, and 10,11 pin are one group, and 12,13 pin are one group, separate between each group.Only carry out anti-phase to OE signal in LED display module.7th pin GND, power supply ground.14th pin VCC, positive source.
74HC245 is 8 bidirectional shift registers, and the effect in LED display module has been that signal power is amplified, shaping is used.
74HC245 is a high-speed cmos device, 74HC245 pin compatibility low-power consumption Schottky TTL(LSTTL) series.74HC245 eight road transceiver all has positive tristate bus line compatibility and exports in transmission and reception both direction.The output enable end (OE) of 74HC245 for realizing light cascade, and sending/receiving end (DIR) for controlling party to.OE controls to export, and bus is effectively isolated.74HC245 and 74HC640 logic function is similar, but 74HC245 has true form (positive) output.
APM4953 is row cutting pipe, power tube, its inside is two separate CMOS tube, and 1,3 pin meet VCC, 2,4 pin control pins, the output of 2 foot control system 7,8 pin, the output of 4 foot control system 5,6 pin, only has when 2 pin are for " 0 ", 7,8 just can export, when 4 pin are " 0 ", 5,6 just can export, otherwise export as high-impedance state.
Described LED drive IC is the one in MBI5024, MBI5042, MBI6024.MBI5024 utilizes up-to-date PrecisionDrive technology, and aim at the drive IC of LED display panel design, the CMOS bit shift register that it is built-in and bolt-lock function, can convert the input data of serial to parallel output data layout.The input voltage range value of MBI5024 is 3.3 volts to 5 volts, provides 16 current sources, 1 ~ 45mA can be provided to determine the magnitude of current with driving LED in each output stage; And the current difference of output channel is less than ± 2%IOUT=25mA in single IC, ± 2.5%IOUT=1mA; Output current difference between many IC is less than ± and 3%; Electric current, along with output terminal withstand voltage (VDS) change, is controlled in every volt 0.1%; And electric current is subject to service voltage (VDD), the change of environment temperature is also controlled in 1%.
User can via selecting the RSET of different resistance to adjust the size of current of each output stage of MBI5024, by this mechanism, and user can the luminosity of accurately control LED.
Described signal input port, signal output port all adopt the double cattle horn socket of 2*10P.
Claims (5)
1. a lamp drives the LED display module of separation, comprise circuit board, described circuit board comprises the LED lamp panel cooperatively interacting and connect, drive plate, it is characterized in that: described LED lamp panel, drive plate is many groups, wherein every evenly distributed some LED in front of LED lamp panel in group, the back side of LED lamp panel arranges the first signaling interface, first power interface, often in group, the front of drive plate arranges secondary signal interface, second source interface, the back side of drive plate arranges LED drive IC, signal input port, signal output port, power input port, described first signaling interface is connected with secondary signal Interference fit, described first power interface is connected with second source Interference fit, described signal input port respectively with the signal input pin of LED drive IC, signal output port connects, the signal output pin of LED drive IC is connected with secondary signal interface, first signaling interface is connected with the control pin of LED, power input port respectively with second source interface, the supply pin of LED drive IC connects, first power interface is connected with the supply pin of LED, the control signal of external control system transfers to secondary signal interface and signal output port by signal input port, then transfer to through the first signaling interface the work that LED lamp panel controls LED, next stage LED display module is transferred to through signal output port, external power source transfers to second source interface by power input port, then, transferring to LED lamp panel through the first power interface is that LED is powered, simultaneously for LED drive IC is powered.
2. lamp according to claim 1 drives the LED display module of separation, it is characterized in that: also comprise line scanning control IC, row cutting IC, phase inverter, signal power amplification IC, described line scanning control IC controls LED and lights successively line by line, a line LED is only had to be in illuminating state in the same time, described row cutting IC provides electric current for the LED that often row is lighted, described phase inverter is for signals reverse for line scanning control IC provides low level or high level, and signal power is amplified IC and is used for the power amplification of LED control signal, shaping.
3. lamp according to claim 2 drives the LED display module of separation, it is characterized in that: described line scanning control IC is 74HC138, and described row cutting IC is APM4953, and described phase inverter is 74HC04, and it is 74HC245 that described signal power amplifies IC.
4. lamp according to claim 1 drives the LED display module of separation, it is characterized in that: described LED drive IC is the one in MBI5024, MBI5042, MBI6024.
5. lamp according to claim 1 drives the LED display module of separation, it is characterized in that: described signal input port, signal output port all adopt the double cattle horn socket of 2*10P.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410476995.9A CN104252842A (en) | 2014-09-18 | 2014-09-18 | LED (Light Emitting Diode) display screen module with separated lamp boards and driving boards |
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| CN201410476995.9A CN104252842A (en) | 2014-09-18 | 2014-09-18 | LED (Light Emitting Diode) display screen module with separated lamp boards and driving boards |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105139788A (en) * | 2015-07-31 | 2015-12-09 | 苏州宏展信息科技有限公司 | Bar LED display screen data transmission method |
| CN105845045A (en) * | 2016-05-30 | 2016-08-10 | 无锡昊瑜节能环保设备有限公司 | High-density LED (Light Emitting Diode) panel |
| CN105869535A (en) * | 2016-05-30 | 2016-08-17 | 无锡昊瑜节能环保设备有限公司 | High-density LED display screen heat dissipating system |
| CN105976752A (en) * | 2016-04-27 | 2016-09-28 | 江苏利鼎微系统有限公司 | Scanning method of high refresh rate 1/64 scanning P4 full color LED display module group |
| CN107633779A (en) * | 2017-11-24 | 2018-01-26 | 山西高科华烨电子集团有限公司 | LED display based on COB technologies |
| CN110164321A (en) * | 2019-05-17 | 2019-08-23 | 深德彩智能科技(东莞)有限公司 | A kind of LED display module and LED display |
| CN110648599A (en) * | 2018-06-26 | 2020-01-03 | 杭州海康威视数字技术股份有限公司 | LED box body lamp panel interface device and LED box body with same |
| CN113129842A (en) * | 2019-12-31 | 2021-07-16 | Tcl集团股份有限公司 | Drive board, backlight drive circuit and backlight system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105139788A (en) * | 2015-07-31 | 2015-12-09 | 苏州宏展信息科技有限公司 | Bar LED display screen data transmission method |
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| CN105845045A (en) * | 2016-05-30 | 2016-08-10 | 无锡昊瑜节能环保设备有限公司 | High-density LED (Light Emitting Diode) panel |
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| CN107633779A (en) * | 2017-11-24 | 2018-01-26 | 山西高科华烨电子集团有限公司 | LED display based on COB technologies |
| CN110648599A (en) * | 2018-06-26 | 2020-01-03 | 杭州海康威视数字技术股份有限公司 | LED box body lamp panel interface device and LED box body with same |
| CN110164321A (en) * | 2019-05-17 | 2019-08-23 | 深德彩智能科技(东莞)有限公司 | A kind of LED display module and LED display |
| CN113129842A (en) * | 2019-12-31 | 2021-07-16 | Tcl集团股份有限公司 | Drive board, backlight drive circuit and backlight system |
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Application publication date: 20141231 |