CN103162184A - Light-emitting diode (LED) backlight module and electronic equipment - Google Patents
Light-emitting diode (LED) backlight module and electronic equipment Download PDFInfo
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- CN103162184A CN103162184A CN201310057147XA CN201310057147A CN103162184A CN 103162184 A CN103162184 A CN 103162184A CN 201310057147X A CN201310057147X A CN 201310057147XA CN 201310057147 A CN201310057147 A CN 201310057147A CN 103162184 A CN103162184 A CN 103162184A
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Abstract
The invention discloses a light-emitting diode (LED) backlight module and a television. The LED backlight module comprises a main reflecting piece, a first LED light source and a diffusion plate. A reflecting thin membrane is arranged on a first surface of the main reflecting piece. The main reflecting piece comprises an edge area and a central area. The edge area is an area where the distance between the edge area and the edges of the main reflecting piece is less than or equal to a first preset distance. The first LED light source is arranged in the edge area. The first LED light source is an LED light source with first power. A light emitting surface of the first LED light source is perpendicular to the main reflecting piece. Light rays emitted by the light emitting surface light on the central area of the main reflecting piece. The diffusion plate is arranged above the first LED light source, and is parallel to the main reflecting piece. The light rays emitted through the light emitting surface of the first LED light source form scattered light after being reflected by the main reflecting piece and being reflected and refracted by the diffusion plate and light out of the diffusion plate.
Description
Technical field
The present invention relates to the back lighting technical field, particularly a kind of LED-backlit module and electronic equipment.
Background technology
Development along with electronic technology, produced increasing electronic equipment, wherein, a lot of electronic equipments all have LCDs, and generally, LCDs comprises liquid crystal panel and backlight module, described liquid crystal panel is comprised of layer glass substrate therebetween one liquid crystal layer, wherein, because liquid crystal panel itself is not luminous, so need to provide uniform light-source system for it by backlight module.
In the prior art, generally, the LED-backlit module comprises: direct-light type LED backlight module and side entering-type LED backlight module, wherein, as shown in Fig. 1 a and Fig. 1 b, the direct-light type LED backlight module comprises following structure (wherein, Fig. 1 a is the cross-sectional view of down straight aphototropism mode set, and Fig. 1 b is the distribution map of LED light source on reflector):
Light is propagated cavity 104, and the space between described reflector plate 101 and described diffuser plate 103 is described light and propagates cavity 104;
Wherein, by the incident light that described LED light source 102 produces, propagate the interior Multi reflection of cavity 104 and refraction via described reflector plate 101 and described diffuser plate 103 at described light, finally form uniform scattered light.
generally, the thickness of direct-light type LED backlight module depends on the size of light mixing distance and diffuser plate, and light mixing distance depends on the quantity of LED light source 102 and the after-treatment of LED light source 102, that is to say when the quantity of LED light source 102 is more, light in the LED-backlit module is stronger, just can reduce light mixing distance this moment, if during the negligible amounts of LED light source 102, need accordingly to increase light mixing distance, when but LED light source 102 is less, this LED-backlit module can not reach fine effect backlight, so also can make the thickness of LED-backlit module increase, when if the optical processing device in the LED-backlit module is more certainly, also can reduce light mixing distance, then can be so that light be even by the processing of optics.
The present application people finds to exist in prior art following technical problem at least in the process that realizes the embodiment of the present application technical scheme:
Due to light mixing distance H(LED lamp light output surface to vertical range between diffuser plate) will cause the direct-light type LED backlight module to have the lamp shadow problem with the ratio of LED lamp spacing P during less than a fixed value, therefore, for avoiding lamp shadow to need H/P ratio is kept on a fixed value.Development along with LED, its power is more and more higher, under equal brightness requires, the LED density of arranging diminishes, thereby causes the spacing P between the LED lamp increasing, when making H/P ratio keep on an above-mentioned fixed value, must strengthen light mixing distance H value, like this, large if light mixing distance H value becomes, will cause direct-light type LED backlight module thickness larger.
Because LED exiting surface in direct-light type LED backlight module of the prior art is parallel with described principal reflection sheet, namely the light of this LED light source emission will shine directly on diffuser plate, because LED light source has certain lighting angle, its irradiation area can only be the reason of a FX, thereby can cause zone that LED light source can not shine can form the technical problem of lamp shadow.
Summary of the invention
The embodiment of the present invention provides a kind of LED-backlit module and electronic equipment, be used for to solve prior art direct-light type LED backlight module with light mixing distance arrange higher, to cause the larger technical problem of thickness of direct-light type LED backlight module, its concrete technical scheme is as follows:
On the one hand, the application provides following technical scheme by an embodiment:
A kind of direct-light type LED backlight module comprises:
The principal reflection sheet is provided with light reflecting membrane on the first surface of described principal reflection sheet, and described principal reflection sheet comprises fringe region and central area, and described fringe region is that distance with the edge of the described principal reflection sheet of distance is less than or equal to the zone of the first predeterminable range;
The first LED light source, be arranged in described fringe region, described the first LED light source is the LED light source with first power, and the exiting surface of described the first LED light source is vertical with described principal reflection sheet, and the described central area of the described principal reflection sheet of light directive of described exiting surface emission;
Diffuser plate is arranged at the top of described the first LED light source, and parallel with described principal reflection sheet;
Wherein, the light that sends by described the first LED light source exiting surface is via the reflection of described main reflecting piece, and after the reflection of described diffuser plate and refraction, forms scattered light and penetrate described diffuser plate.
Optionally, described LED-backlit module also comprises:
Photic zone, be arranged at upper surface or the lower surface of described diffuser plate, be provided with a plurality of transmission regions on described photic zone, each transmission region in described a plurality of transmission region is provided with a light transmittance, so that the light that described the first LED light source exiting surface sends after process emission and refraction between described principal reflection sheet and described diffuser plate, forms uniform scattered light and penetrates described diffuser plate.
Optionally, described LED-backlit module also comprises:
The second LED light source is arranged in described fringe region, and described the second LED light source and described the first LED light source are about described principal reflection sheet Central Symmetry, and the exiting surface of described the second LED light source is vertical with described principal reflection sheet;
Wherein, the opposite direction of described the first LED light source exiting surface emission of light and described the second LED light source exiting surface emission of light.
Optionally, described LED-backlit module also comprises:
The 3rd LED light source, be arranged in the described fringe region of described principal reflection sheet, between described the first LED light source and described the second LED light source, the exiting surface of described the 3rd LED light source is vertical with described principal reflection sheet, the described central area of the described principal reflection sheet of light directive of described the 3rd LED light source exiting surface emission;
The 4th LED light source is arranged in the described fringe region of described principal reflection sheet, and the exiting surface of described the 4th LED light source is vertical with described principal reflection sheet, and described the 4th LED and described the 3rd LED light source are about described principal reflection sheet Central Symmetry;
Wherein, the radiation direction of described the 3rd LED light source exiting surface emission is opposite with the radiation direction of described the 4th LED light source exiting surface emission.
Optionally, described LED-backlit module also comprises:
Optical diaphragm group is arranged at described diffuser plate exiting surface, and wherein, described optical diaphragm group can be to the effect of described scattered light uniform light and enhancing optical gain.
Optionally, described LED-backlit module also comprises:
Side reflector is arranged at described principal reflection sheet both sides, and the maximum height of described side reflector is less than the distance between described principal reflection sheet and described diffuser plate.
Optionally, the angle between described side reflecting piece and described main reflecting piece is less than or equal to 90 degree.
A kind of display device comprises:
Housing;
Liquid crystal panel;
Described direct-light type LED backlight module described above is arranged at bottom described liquid crystal panel, uniform light is provided can for described liquid crystal panel by described LED-backlit module.
A kind of electronic equipment comprises:
Casing;
Processor is arranged in described casing;
Display unit is arranged on described casing, is connected with described processor, and wherein, described display unit comprises:
Liquid crystal panel;
Direct-light type LED backlight module described above is arranged at bottom described liquid crystal panel, uniform light is provided can for described liquid crystal panel by described LED-backlit module.
The one or more technical schemes that provide in the embodiment of the present application have following technique effect or advantage at least:
due in the embodiment of the present application, in the direct-light type LED backlight module, the principal reflection sheet comprises fringe region and central area, this fringe region is and the distance at the edge of the distance principal reflection sheet zone less than or equal to the first predeterminable range, first LED light source that then will have the first power is arranged at the fringe region of principal reflection sheet, and the exiting surface that this first LED light source sends is vertical with the principal reflection sheet, thereby can so that the light of the first LED light source emission can be in the direct-light type LED backlight module irradiation area larger, so just can be in the zone that reduces to have avoided the first LED light source not shine on the basis of light mixing distance, therefore can effectively prevent the lamp shadow problem, and then farthest reduced direct-light type LED backlight module light mixing distance, so reached the technique effect that reduces direct-light type LED backlight module thickness.
Description of drawings
Fig. 1 a-Fig. 1 b is the structure chart of direct-light type LED backlight module of the prior art;
Fig. 2 a-Fig. 2 c is the structure chart of direct-light type LED backlight module in the embodiment of the present invention;
Fig. 3 is a kind of photic zone schematic diagram in the embodiment of the present invention;
Fig. 4 is that in the embodiment of the present invention, the photic zone light transmittance is divided schematic diagram;
Fig. 5 a-Fig. 5 b is the structural representation that in the embodiment of the present invention, the direct-light type LED backlight module comprises two LED light sources;
Fig. 6 a-Fig. 6 b is the structural representation that in the embodiment of the present invention, the direct-light type LED backlight module comprises four LED light sources;
Fig. 7 is the structure chart that comprises the direct-light type LED backlight module of framework in the embodiment of the present invention one;
Fig. 8 is the structure chart that has comprised the direct-light type LED backlight module of side reflecting piece in the embodiment of the present invention one;
Fig. 9 is the structure chart that has comprised the direct-light type LED backlight module of optical diaphragm group in the embodiment of the present invention one;
Figure 10 is the structure chart of a kind of display device in the embodiment of the present invention two.
The specific embodiment
The embodiment of the present invention provides a kind of LED-backlit module and electronic equipment, be used for to solve prior art direct-light type LED backlight module with light mixing distance arrange higher, will cause the larger technical problem of thickness of direct-light type LED backlight module.
For above-mentioned technical problem of the prior art, the invention provides following technical scheme:
the invention provides a kind of direct-light type LED backlight module, this direct-light type LED backlight module comprises the principal reflection sheet, the first LED light source, diffuser plate, be provided with light reflecting membrane on the first surface of this principal reflection sheet, and include edge and central area on the principal reflection sheet, described fringe region is that distance with the edge of the described principal reflection sheet of distance is less than or equal to the zone of the first predeterminable range, then one the first LED light source with first power is set in the fringe region of described principal reflection sheet, the exiting surface of this first LED light source is vertical with described principal reflection sheet, and the described central area of the described principal reflection sheet of light directive of described the first LED light source exiting surface emission, then described diffuser plate is arranged at the top of the first LED light source, and parallel with described principal reflection sheet, the light that last the first LED light source sends is by the principal reflection sheet, diffuser plate emission and refraction, form scattered light and penetrate described diffuser plate.
In above-mentioned direct-light type LED backlight module, the first LED light source is arranged in the fringe region of main reflecting piece, and the exiting surface of the first LED light source is vertical with described principal reflection sheet, so just can effectively prevent the lamp shadow problem, and farthest reduce the light mixing distance in the direct-light type LED backlight module, so reached the technique effect that reduces direct-light type LED backlight module thickness.
In order better to understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
Embodiment one
The embodiment of the present application one provides a kind of direct-light type LED backlight module, and this direct-light type LED backlight module comprises:
please refer to Fig. 2 a and Fig. 2 b, wherein, Fig. 2 a is the top view of described direct-light type LED backlight module, this direct-light type LED backlight module has comprised principal reflection sheet 201 in Fig. 2 a, this principal reflection sheet is divided into fringe region 202 and central area 204, the first LED light source 203, this first LED light source 203 is placed in the fringe region 202 of principal reflection sheet 201, wherein the fringe region 202 of this principal reflection sheet 201 is apart from the distance at the principal reflection sheet 201 edges zone less than or equal to the first predeterminable range L, shadow region in Fig. 2 a is fringe region 202, the size of this fringe region 202 depends on the size of the first predeterminable range L.
In addition, process the position that the first LED light source 203 is placed can be beyond position in Fig. 2 a, can also be arranged on position as shown in Fig. 2 b at this first LED light source 203 in the invention process, the first LED light source 203 is arranged at the corner areas of described main sheet emitting 201 in Fig. 2 b.And the exiting surface of the first LED light source 203 is vertical with main sheet emitting 201, and the light that this first LED light source 203 sends shines to the central area of main sheet emitting 201.
need to prove that the first predeterminable range needs only the width greater than the first LED light source 203, such as the size of this first LED light source 203 and 3.2*1.5*1.6mm, at this moment, in order to guarantee that this first LED light source 203 can be placed in fringe region 202 completely, therefore, this first predeterminable range L just can be set to less than or equal to the 3.2mm that 3.2mm(should locate be one in embodiments of the present invention one for example, a specific zone just will be described herein, must be made into below 3.2mm and do not limit, can be in a zone with respect to the first LED light source 203 sizes in embodiments of the present invention, such as can be arbitrary value between 1mm ~ 4mm), specifically, in Fig. 2 a, determining of this fringe region 202 is exactly to determine an annular region in the marginal portion of rectangle on the basis of determining the first predeterminable range L, the width of this annular region is in pre-set interval scope corresponding to the width of the first LED light source.
after determining fringe region 202 by above-mentioned method, just the first LED light source 203 can be placed on the arbitrary position in fringe region 202, after the location positioning with the first LED light source 203, when placing the first LED light source 203, the exiting surface of this first LED light source 203 need to be vertical with principal reflection sheet 201, that is to say that light that this first LED light source 203 sends is irradiations (as shown in Fig. 2 c) on horizontal direction with respect to principal reflection sheet 201, rather than with respect to principal reflection sheet 201 vertical irradiations, and the light that the exiting surface of this first LED light source 203 sends is the described principal reflection sheet of directive 201 central areas 204.
Fig. 2 b is the side view of direct-light type LED backlight module, in Fig. 2 b, this direct-light type LED backlight module has comprised principal reflection sheet 201, the first LED light source 203 and diffuser plate 204, be provided with light reflecting membrane on the first surface of described principal reflection sheet 201, this first surface can be that the one side that principal reflection sheet 201 is placed the first LED light source 203 can also be the back side of placing the first LED light source 203, certainly, if light reflecting membrane is when the back side of principal reflection sheet 201, this principal reflection sheet 201 is made for the material of transparent material, this light reflecting membrane can be launched the light that shines on principal reflection sheet 201, therefore, can the light that the first LED light source 203 irradiates be reflected and reflect by principal reflection sheet 201 and diffuser plate 204, penetrate described diffuser plate from making the first LED light source 203 irradiations light out form scattered light.
in embodiments of the present invention in order to make the light that is penetrated by diffuser plate more even, therefore, upper surface or lower surface at described diffuser plate 204 is provided with a photic zone 301(as shown in Figure 3 in embodiments of the present invention), this photic zone 301 has default light transmittance, be provided with a plurality of transmission regions on this photic zone 301, each transmission region in described a plurality of transmission region is provided with a light transmittance, so that the light that described the first LED light source 203 exiting surfaces send is after process emission and refraction between described principal reflection sheet and described diffuser plate, form uniform scattered light and penetrate described diffuser plate in embodiments of the present invention due to the position of the first LED light source 203 fringe region at principal reflection sheet 201, therefore, this euphotic each regional corresponding light transmittance is not identical in embodiments of the present invention, specifically, light transmittance near the first LED light source 203 is lower, then the light transmittance near the central area is higher gradually, such as in Fig. 4, the light transmittance of this photic zone 301 can be divided into 10 zones, the light transmittance of first area is 20%, the light transmittance of second area is 40%, the light transmittance in the 3rd zone is 60%, the four-range light transmittance is 80%, the 5th zone 100%, the light transmittance in the 6th zone is 100%, the light transmittance in SECTOR-SEVEN territory is 80%, the light transmittance in Section Eight territory is 60%, the light transmittance in the 9th zone is 40%, the light transmittance 20% in the tenth zone.
Certainly, light transmittance on this photic zone 203 can also be the light transmittance that is set to linear change in embodiments of the present invention, specifically, the regional light transmittance nearer apart from the light transmittance of the first LED light source 203 is less, then along with distance increase gradually also linear increase of light transmittance, reach at last the maximum transmission rate.
The light transmittance of this photic zone 301 can cause the process that the central area forms gradual change from fringe region in the above-described embodiment, and namely euphotic light transmittance can be caused the central area and be increased gradually by fringe region.
owing to needing larger light transmittance in the central area, the 5th zone and the 6th zone are the central area of corresponding principal reflection sheet 201 in Fig. 4, therefore, the light transmittance in the 5th zone and the 6th zone is all 100% in embodiments of the present invention, such light transmittance setting can be so that less near the light transmittance of the first LED light source 203, and it is larger away from the light transmittance of the first LED light source 203, therefore, just can so that the light that the first LED light source 203 sends between principal reflection sheet 201 and diffuser plate 204 through repeatedly the refraction, can form uniform scattered light after reflection penetrates from described diffuser plate 204.
LED light source can shine all zones in down straight aphototropism mode set in order to make, therefore in embodiments of the present invention, this direct-light type LED backlight module can also wrap the second LED light source (as shown in Fig. 5 a), this second LED light source 501 arranges in fringe region 202 with this principal reflection sheet 201 too, and described the second LED light source 501 is centrosymmetric about principal reflection sheet 201 with described the first LED light source 203, and the exiting surface of this second LED light source 501 is vertical with principal reflection sheet 201, the opposite direction that the direction that described the first LED light source 203 emits beam and the second LED light source 501 emit beam, can find out from Fig. 5 a, the light that the light that the first LED light source 203 sends and the second LED light source send is centrosymmetric about principal reflection sheet 201.
need to prove, in the present invention the putting position of putting position in Fig. 5 a of the first LED light source 203 and the second LED light source 501, it can also be the putting position as shown in figure Fig. 5 b, this first LED light source 203 and the second LED light source 501 are placed on the place, right angle of this principal reflection sheet 201 in Fig. 5 b, and the light of the first LED light source 203 and the second LED light source is the described central area 204 of directive all, certainly the placement location in Fig. 5 a and Fig. 5 b, the first LED light source and the second LED light source can also be placed on other positions in fringe region 202.
further, in order to make the light in the direct-light type LED backlight module more even, and the reason that can more effectively avoid LED light source light irradiation in prior art causes the problem of lamp shadow, therefore, place the first LED light source 203 and the second LED light source 501 in edge region 202 in embodiments of the present invention, can also be that increase the 3rd LED light source 601 and the 4th LED light source 601(are as shown in Fig. 6 a), the 3rd LED light source 601 is arranged in the fringe region 202 of principal reflection sheet 201, and between the first LED light source 203 and the second LED light source 501, and the exiting surface of the 3rd LED light source 601 is vertical with principal reflection sheet 201, the central area 204 of the light directive principal reflection sheet 201 of described the 3rd LED light source 601 emissions.
Certainly, the first LED light source 203, the second LED light source 501, the 3rd LED light source 601 and the 4th LED light source 602 are except the modes of emplacement as shown in Fig. 6 b, it can also be modes of emplacement as shown in Figure 7, these four LED light sources are placed on respectively four edges of principal reflection sheet 201, the exiting surface of each LED light source is vertical with main sheet emitting 201, and the light of each LED light source emission is the central area 204 of directive master sheet emitting 201.
Then the 4th LED light source 602 also arrange with fringe region 202 in, and be with respect to principal reflection sheet 201 setting that is centrosymmetric with the 3rd LED light source 601, specifically as shown in Fig. 6 a, the 3rd LED light source 601 and the 4th LED light source 602 are identical with the first LED light source 203 and the setting means of the second LED light source 501 on principal reflection sheet 201 at principal reflection sheet 201, therefore repeat no more.
certainly, direct-light type LED backlight module in embodiments of the present invention is except above-mentioned element, in specific implementation process, as shown in Figure 7, described LED-backlit module also comprises framework 701, wherein, described principal reflection sheet 201 is arranged at described framework 701 surfaces, framework 701 comprises again base of frame and frame side wall, described principal reflection sheet 201 is arranged at described framework 701 lower surface, described principal reflection sheet 201 is mainly used in and will is arranged on the light reflection that on fringe region 202, LED light source produces or scatters to described diffuser plate 204, in specific implementation process, in order to strengthen the reflecting effect of principal reflection sheet 201, can adopt the higher reflecting material of reflectivity as far as possible.
In order to strengthen reflection of light and scattering, in specific implementation process, as shown in Figure 8, described LED-backlit module also comprises in addition:
Can be independent reflector at the sheet of principal reflection described in specific implementation process 201 and described side reflector 801, be arranged at respectively bottom and the both sides of described framework 701, reflector that also can be as a whole, mode by bending is arranged at different zones, can reach better reflection and dispersion effect by described principal reflection sheet 201 and described side reflector 801.
Wherein, please continue with reference to figure 8, as a preferred embodiment, angle K between described principal reflection sheet 201 and described side reflector 801 is less than 90 degree, be for example: which kind of angle 70 degree, 60 degree, 50 degree etc. are for described angle, and the embodiment of the present application is not restricted.
As seen from the above description, due in the embodiment of the present application, except principal reflection sheet 201 is set, also be provided with side reflector 1 at principal reflection sheet 201 sidewalls in the direct-light type LED backlight module, so the more uniform technique effect of the light that provides has been provided.
In specific implementation process, in order to obtain better light effects, described LED light source adopts the stronger LED light source of power usually, and as a preferred embodiment, 4 LED light sources are set on principal reflection sheet 201, namely on four angular vertex positions of described principal reflection sheet 201, LED light source is set all, and then increases brightness.
In specific implementation process, in described LED light source, every group of LED light source comprises: at least one sends out LED light source monochromatic.Wherein, described monochromatic light can be random color monochromatic light, such as: which kind of color white light, ruddiness, blue light, green glow etc. are for described monochromatic light, and the embodiment of the present application is not restricted.
In specific implementation process, please refer to Fig. 9, described direct-light type LED backlight module also comprises:
In specific implementation process, described optical diaphragm group 901 specifically comprises:
Diffusion sheet is arranged at described diffuser plate surperficial;
Light-collecting piece is arranged at described diffusion sheet surperficial;
Polaroid is arranged at described light-collecting piece surperficial.
In specific implementation process, on described optical diaphragm group 901 surfaces, will be provided with for the liquid crystal panel that shows image, wherein, the incident light that produces by LED light source finally is used for providing uniform light to described liquid crystal panel.
Embodiment two
Based on same inventive concept, the embodiment of the present application two provides a kind of display device, please refer to Figure 10, and described television set specifically comprises following structure:
The direct-light type LED backlight module that the embodiment of the present application one is introduced is arranged at described liquid crystal panel 114 bottoms, uniform light is provided can for described liquid crystal panel 114 by described direct-light type LED backlight module.
Embodiment three
Based on same inventive concept, the embodiment of the present application also provides a kind of electronic equipment, and described electronic equipment specifically comprises following structure:
Casing;
Processor is arranged in described casing;
Display unit is arranged on described casing, is connected with described processor, and wherein, described display unit comprises:
Liquid crystal panel;
Above-mentioned direct-light type LED backlight module is arranged at bottom described liquid crystal panel, uniform light is provided can for described liquid crystal panel by described LED-backlit module.
The television set of introducing due to the present embodiment two, for being provided with the television set of the LED-backlit module that the embodiment of the present application one introduces, so based on institute's LED-backlit module in the embodiment of the present application one, the concrete structure that those skilled in the art can understand television set in the embodiment of the present application two with and various version, so introduce no longer in detail for this television set at this.As long as those skilled in the art adopt the television set of the LED-backlit module manufacturing in the embodiment of the present application one, all belong to the scope of the application institute wish protection.
One or more technical schemes that the application provides have following technique effect or advantage at least:
(1) due in the embodiment of the present application, in the direct-light type LED backlight module, principal reflection sheet Bao Ke fringe region and central area, this fringe region is and the distance at the edge of the distance principal reflection sheet zone less than or equal to the first predeterminable range, first LED light source that then will have the first power is arranged at the fringe region of principal reflection sheet, and the exiting surface that this first LED light source sends is vertical with the principal reflection sheet, thereby can so that the light of the first LED light source emission can be in the direct-light type LED backlight module irradiation area larger, so just can be in the zone that reduces to have avoided the first LED light source not shine on the basis of light mixing distance, therefore can effectively prevent the lamp shadow problem, and then farthest reduced direct-light type LED backlight module light mixing distance, so reached the technique effect that reduces direct-light type LED backlight module thickness.
(2) in embodiments of the present invention, also comprised the photic zone that is provided with default light transmittance in this direct-light type LED backlight module, this photic zone can make the light of the first LED light source emission to transmit the direct-light type LED backlight module according to the different light transmittances on photic zone, thereby the light that just can make the direct-light type LED backlight module penetrate can be more even.
(3) due in the embodiment of the present application, except the principal reflection sheet is set, also be provided with side reflector at principal reflection sheet sidewall in the direct-light type LED backlight module, so the more uniform technique effect of the light that provides has been provided.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. a direct-light type LED backlight module, is characterized in that, comprising:
The principal reflection sheet is provided with light reflecting membrane on the first surface of described principal reflection sheet, and described principal reflection sheet comprises fringe region and central area, and described fringe region is that distance with the edge of the described principal reflection sheet of distance is less than or equal to the zone of the first predeterminable range;
The first LED light source, be arranged in described fringe region, described the first LED light source is the LED light source with first power, and the exiting surface of described the first LED light source is vertical with described principal reflection sheet, and the described central area of the described principal reflection sheet of light directive of described exiting surface emission;
Diffuser plate is arranged at the top of described the first LED light source, and parallel with described principal reflection sheet;
Wherein, the light that sends by described the first LED light source exiting surface is via the reflection of described principal reflection sheet, and after the reflection of described diffuser plate and refraction, forms scattered light and penetrate described diffuser plate.
2. LED-backlit module claimed in claim 1, is characterized in that, described LED-backlit module also comprises:
Photic zone is arranged at upper surface or the lower surface of described diffuser plate.
3. LED-backlit module as claimed in claim 1, is characterized in that, described LED-backlit module also comprises:
The second LED light source is arranged in described fringe region, and described the second LED light source and described the first LED light source are about described principal reflection sheet Central Symmetry, and the exiting surface of described the second LED light source is vertical with described principal reflection sheet;
Wherein, the opposite direction of described the first LED light source exiting surface emission of light and described the second LED light source exiting surface emission of light.
4. LED-backlit module as claimed in claim 3, is characterized in that, described LED-backlit module also comprises:
The 3rd LED light source, be arranged in the described fringe region of described principal reflection sheet, between described the first LED light source and described the second LED light source, the exiting surface of described the 3rd LED light source is vertical with described principal reflection sheet, the described central area of the described principal reflection sheet of light directive of described the 3rd LED light source exiting surface emission;
The 4th LED light source is arranged in the described fringe region of described principal reflection sheet, and the exiting surface of described the 4th LED light source is vertical with described principal reflection sheet, and described the 4th LED and described the 3rd LED light source are about described principal reflection sheet Central Symmetry;
Wherein, the radiation direction of described the 3rd LED light source exiting surface emission is opposite with the radiation direction of described the 4th LED light source exiting surface emission.
5. LED-backlit module as described in arbitrary claim in claim 1 ~ 4, is characterized in that, described LED-backlit module also comprises:
Optical diaphragm group is arranged at described diffuser plate exiting surface.
6. LED-backlit module as claimed in claim 1, is characterized in that, described LED-backlit module also comprises:
Side reflector is arranged at described principal reflection sheet both sides, and the maximum height of described side reflector is less than the distance between described principal reflection sheet and described diffuser plate.
7. LED-backlit module as claimed in claim 6, is characterized in that, the angle between described side reflecting piece and described main reflecting piece is less than or equal to 90 degree.
8. a display device, is characterized in that, comprising:
Housing;
Liquid crystal panel;
The described LED-backlit module of claim as arbitrary in claim 1-7 is arranged at bottom described liquid crystal panel, uniform light is provided can for described liquid crystal panel by described LED-backlit module.
9. an electronic equipment, is characterized in that, comprising:
Casing;
Processor is arranged in described casing;
Display unit is arranged on described casing, is connected with described processor, and wherein, described display unit comprises:
Liquid crystal panel;
The described LED-backlit module of claim as arbitrary in claim 1-7 is arranged at bottom described liquid crystal panel, uniform light is provided can for described liquid crystal panel by described LED-backlit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310057147XA CN103162184A (en) | 2013-02-22 | 2013-02-22 | Light-emitting diode (LED) backlight module and electronic equipment |
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| CN201310057147XA CN103162184A (en) | 2013-02-22 | 2013-02-22 | Light-emitting diode (LED) backlight module and electronic equipment |
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| CN103162184A true CN103162184A (en) | 2013-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015972A (en) * | 2016-07-19 | 2016-10-12 | 上海顿格电子贸易有限公司 | Downward panel lamp |
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| CN101017280A (en) * | 2006-02-10 | 2007-08-15 | 鸿富锦精密工业（深圳）有限公司 | Box-type light source mold train and back light system |
| CN101858566A (en) * | 2010-04-21 | 2010-10-13 | 刘姝 | Light source reflector used in backlight component and backlight component thereof |
| CN101939675A (en) * | 2008-02-07 | 2011-01-05 | 3M创新有限公司 | Hollow backlight with structured film |
| CN102221118A (en) * | 2010-04-15 | 2011-10-19 | 通用汽车环球科技运作有限责任公司 | Band clamp having radial alignment feature |
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| US5381309A (en) * | 1993-09-30 | 1995-01-10 | Honeywell Inc. | Backlit display with enhanced viewing properties |
| JPH11218754A (en) * | 1998-01-29 | 1999-08-10 | Yazaki Corp | Back light device |
| CN101017280A (en) * | 2006-02-10 | 2007-08-15 | 鸿富锦精密工业（深圳）有限公司 | Box-type light source mold train and back light system |
| CN101939675A (en) * | 2008-02-07 | 2011-01-05 | 3M创新有限公司 | Hollow backlight with structured film |
| CN102221118A (en) * | 2010-04-15 | 2011-10-19 | 通用汽车环球科技运作有限责任公司 | Band clamp having radial alignment feature |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106015972A (en) * | 2016-07-19 | 2016-10-12 | 上海顿格电子贸易有限公司 | Downward panel lamp |
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Application publication date: 20130619 |