CN202835058U - Straight-down type backlight source and liquid crystal display device - Google Patents
Straight-down type backlight source and liquid crystal display device Download PDFInfo
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- CN202835058U CN202835058U CN2012205274305U CN201220527430U CN202835058U CN 202835058 U CN202835058 U CN 202835058U CN 2012205274305 U CN2012205274305 U CN 2012205274305U CN 201220527430 U CN201220527430 U CN 201220527430U CN 202835058 U CN202835058 U CN 202835058U
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Abstract
The utility model relates to liquid crystal display technology, and discloses a straight-down type backlight source and a liquid crystal display device. The straight-down type backlight source is characterized by comprising a back plate, grooves are arranged on the bottom face of the back plate, a light-emitting diode (LED) light strip is arranged in each groove, a bottom reflection piece is arranged on the back plate, notches are arranged on the bottom reflection piece, and the notches correspond to the positions of LED lights on the LED light strips. A plurality of grooves are evenly distributed on the bottom face of the back plate. Each LED light strip is arranged in each groove. The depth of each groove is equal to or smaller than the thickness of each LED light strip. According to the straight-down type backlight source, the LED light strips are placed in the grooves, not only is intensity of the back plate improved, but also the light mixing distance of the backlight source is increased, and accordingly the number of the LED lights in the backlight source is reduced, and the purpose of cost lowering is achieved. The liquid crystal display device with the straight-down type backlight source can reduce the thickness of a liquid crystal module, and the cost of the liquid crystal display device is lowered.
Description
Technical field
The utility model relates to lcd technology, particularly relates to a kind of direct-light-type backlight and liquid crystal indicator.
Background technology
Backlight is the important component part of liquid crystal display device, and its power consumption, thickness, cost occupy very large ratio in whole liquid crystal module.
With in the liquid crystal module, the power consumption of backlight accounts for more than 90% of whole module power consumption at TV, reduces the power consumption of backlight, can effectively realize the reduction of liquid crystal display module power consumption.In the limited situation of the luminous flux of led light source, by backlight is realized real-time control, can reduce greatly the power consumption of liquid crystal module.In direct-light-type backlight, use the dynamic backlight control technology, can at utmost reduce the power consumption of backlight.
The thickness of backlight is far longer than the thickness of liquid crystal panel, so the thickness of backlight has determined the thickness of whole liquid crystal module.Reduce the thickness of backlight, can obviously reduce the thickness of liquid crystal module.
Backlight occupies very large ratio in liquid crystal display mode forms this, and in whole backlight, occupies very high proportion as the LED of light source in whole backlight cost.Reducing the quantity of LED, is the effective way that reduces the backlight cost.
The present invention is directed to direct LED backlight, on the basis that does not increase backlight thickness, increase light mixing distance, reduce the quantity of LED, realize the cost of liquid crystal module.
The utility model content
The technical problem that (one) will solve
The technical problems to be solved in the utility model is the light mixing distance that how to increase backlight, to reduce LED quantity, reduces the cost of Backlight source and liquid crystal display device.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of direct-light-type backlight, comprise backboard, the bottom surface of described backboard is provided with groove, be provided with the LED lamp bar in the described groove, described backboard is provided with end reflector plate, and reflector plate of the described end is provided with breach, and described breach is corresponding with the LED lamp position on the described LED lamp bar.
Further, described groove is made as a plurality of, is respectively equipped with a LED lamp bar in each groove.
Further, a plurality of described grooves are evenly distributed on the bottom surface of described backboard.
Further, the degree of depth of described groove is equal to or less than the thickness of described LED lamp bar.
Further, the breach on the reflector plate of the described end is a plurality of, and a plurality of described breach are array distribution.
Further, described LED lamp bar includes a plurality of LED lamps.
Further, the side of described backboard is bending upwards, and the height of backboard bending forms the light mixing distance of backlight.
Further, the ratio of the level interval of described light mixing distance and adjacent two LED lamp bars is: 1:1 or 1:1.2.
Further, reflector plate is made as white the described end.
The utility model also provides a kind of liquid crystal indicator, comprises above each described direct-light-type backlight.
(3) beneficial effect
A kind of direct-light-type backlight that technique scheme provides, the LED lamp bar is placed among the groove, both improved backboard intensity, again on the basis that does not increase backlight thickness, increased the light mixing distance of backlight, thereby the quantity of LED lamp in the minimizing backlight reaches the purpose of Cost reduction; A kind of liquid crystal indicator with this direct-light-type backlight because the thickness of backlight has determined the thickness of whole liquid crystal module, therefore reduces the thickness of backlight, can obviously reduce the thickness of liquid crystal module, and can reduce the cost of liquid crystal indicator.
Description of drawings
Fig. 1 is the structural representation of the utility model direct-light-type backlight;
Fig. 2 is the partial schematic diagram of the utility model direct-light-type backlight;
Fig. 3 is the structural representation of the utility model dorsulum;
Fig. 4 is the cross sectional representation of the utility model dorsulum;
Fig. 5 is the structural representation of LED lamp bar in the utility model;
Fig. 6 is the structural representation of end reflector plate in the utility model.
Wherein, 1, backboard; 11, backboard bending; 2, groove; 3, LED lamp bar; 31, pcb board; 32, connector; 33, LED lamp; 4, end reflector plate; 41, breach.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for explanation the utility model, but are not used for limiting scope of the present utility model.
As depicted in figs. 1 and 2, a kind of direct-light-type backlight of the present utility model, comprise backboard 1, the bottom surface of this backboard 1 is provided with groove 2, be provided with LED lamp bar 3 in the groove 2, backboard 1 is provided with end reflector plate 4, and this end reflector plate 4 is provided with breach 41, and breach 41 is corresponding with the LED lamp position on the LED lamp bar 3.
The direct-light-type backlight that the utility model embodiment provides, by at backboard 1 groove 2 being set, the LED lamp bar is placed in one, both improved backboard intensity, again on the basis that does not increase backlight thickness, increase the light mixing distance of backlight, thereby reduced the quantity of LED lamp bar in the backlight, reached the purpose of Cost reduction.
Further, as shown in Figure 3 and Figure 4, groove 2 on the bottom surface of backboard 1 is made as a plurality of, these a plurality of grooves 2 are arranged on the bottom surface of backboard 1 equably, be respectively equipped with a LED lamp bar 3 in each groove 2, so that light source is evenly distributed on the backboard 1, can improve the effect of light source.
Further, as shown in Figure 5, LED lamp bar 3 generally comprises pcb board 31, connector 32 and LED lamp 33.Pcb board 31 is carriers of LED lamp 33, and LED33 is arranged on the pcb board 31 according to a determining deviation, and connector 32 is positioned at an end of pcb board 31, and LED33 is connected with connector by the connection of the wire on the pcb board 31, forms certain LED topological structure.
Further, as shown in Figure 6, end reflector plate 4 can be made as white, can strengthen light source effect, reduces light loss.End reflector plate 4 is provided with a plurality of breach 41, and these a plurality of breach 41 are array distribution.LED lamp 33 on the LED lamp bar 3 is corresponding with breach 41 positions on the end reflector plate 4, so that the light-emitting area of LED lamp 33 comes out by this breach.
Particularly, can use one on the whole backlight at the bottom of reflector plate, also can be spliced into one by reflector plate of a plurality of ends 4.
Particularly, as shown in Figure 4, backboard 1 can be for having certain thickness metal material, and its thickness is different and difference to some extent is generally 1 ~ 2mm according to the backboard size.The side of backboard 1 is bending upwards, and the upper end of this backboard bending 11 is used for support of optical film material.Height with the thickness of LED lamp bar 3 and groove 2 is all example mutually, and the height of backboard bending 11 is the light mixing distance h of backlight, mainly is after making spot light that a plurality of LED send through one section space length, to be mixed into uniform area source.Need to prove, the thickness of LED lamp bar 3 also can be a bit larger tham the height of groove 2, be the light-emitting area of LED lamp bar 3 a little more than the bottom surface of backboard 1, at this moment, the light mixing distance of backlight is the distance of bending 11 upper ends to the light-emitting area of LED lamp bar 3.
Particularly, groove 2 mainly is the intensity of strengthening back panel of backlight 1, with control backlight distortion within the specific limits.Backlight dorsulum of the prior art has in its edge groove is set, but only as the effect that increases backboard intensity, the quantity of the groove 2 in the present embodiment equates with the quantity of LED lamp bar 3, and groove 2 just in time is placed in one LED lamp bar 3, as shown in Figure 2, so just can on the basis that does not increase backlight thickness, increase light mixing distance, and then can reduce the quantity of LED lamp, realize reducing the purpose of cost.
Particularly, the width of groove 2 is slightly larger than the width of LED lamp bar 3, so that LED lamp bar 3 just in time places in the groove 2, the degree of depth of groove is determined according to the thickness of pcb board 31 and the height of LED lamp 33.Preferably, the degree of depth of groove 2 equals the thickness of LED lamp bar 3, the thickness of LED lamp bar 3 is the height that the thickness of pcb board 31 adds LED lamp 33, so that the degree of depth of groove 2 just in time is placed in one LED lamp bar 3, only LED lamp 33 light-emitting areas are exposed, at this moment, the light mixing distance h in the backlight is maximum, approaches the height of the bending 11 that equals backboard; The degree of depth of groove 2 can also be less than the thickness of LED lamp bar 3, and this moment is larger than the direct light mixing distance that LED lamp bar 3 is located on the backboard plane in existing, but less than the height of above-mentioned bending 11; The degree of depth of groove 2 should greater than the thickness of LED lamp bar 3, because have in this case light loss partly in groove, and can't not realize the effect of even light mixing.
Particularly, as shown in Figure 4, the centre distance of adjacent two grooves 2 is the level interval of adjacent two LED lamp bars, is made as x, and the proportionate relationship of the light mixing distance h of backlight and adjacent two LED lamp bar level interval x is 1:1.2 ~ 1:1.As increase light mixing distance h, and then the level interval x of adjacent two LED lamp bars also can increase, and then for the same backlight with same light source effect, present embodiment can effectively reduce the quantity of LED lamp bar.Supposing has 20 LED lamp bars in certain direct-light-type backlight, light mixing distance is 20mm, then the spacing x of adjacent LED lamp bar also is 20mm, if light mixing distance h increases 2mm, then the spacing x of adjacent LED lamp bar also can increase 2mm, and then whole backlight needs 18 LED lamp bars to get final product.On a LED lamp bar, 20 LED lamp 33 are arranged as example, then can reduce by 40 LED lamp 33, realize reducing the purpose of cost.
A kind of liquid crystal indicator of the present utility model comprises the direct-light-type backlight that technique scheme provides.
A kind of direct-light-type backlight provided by the utility model, the LED lamp bar is placed among the groove of backboard, both improved backboard intensity, again on the basis that does not increase backlight thickness, increased the light mixing distance of backlight, thereby the quantity of LED lamp in the minimizing backlight reaches the purpose of Cost reduction.Liquid crystal indicator with this direct-light-type backlight, the thickness of backlight has determined the thickness of whole liquid crystal module, therefore reduces the thickness of backlight, can obviously reduce the thickness of liquid crystal module, and reduce the cost of liquid crystal indicator.
The above only is preferred embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (10)
1. direct-light-type backlight, it is characterized in that, comprise backboard, the bottom surface of described backboard is provided with groove, be provided with the LED lamp bar in the described groove, described backboard is provided with end reflector plate, and reflector plate of the described end is provided with breach, and described breach is corresponding with the LED lamp position on the described LED lamp bar.
2. direct-light-type backlight as claimed in claim 1 is characterized in that, described groove is made as a plurality of, is respectively equipped with a LED lamp bar in each groove.
3. direct-light-type backlight as claimed in claim 2 is characterized in that, a plurality of described grooves are evenly distributed on the bottom surface of described backboard.
4. direct-light-type backlight as claimed in claim 1 is characterized in that, the degree of depth of described groove is equal to or less than the thickness of described LED lamp bar.
5. direct-light-type backlight as claimed in claim 1 is characterized in that, the breach on the reflector plate of the described end is a plurality of, and a plurality of described breach are array distribution.
6. direct-light-type backlight as claimed in claim 1 is characterized in that, described LED lamp bar includes a plurality of LED lamps.
7. direct-light-type backlight as claimed in claim 1 is characterized in that, the side of described backboard is bending upwards, and the height of backboard bending forms the light mixing distance of backlight.
8. direct-light-type backlight as claimed in claim 7 is characterized in that, the ratio of the level interval of described light mixing distance and adjacent two LED lamp bars is: 1:1 or 1:1.2.
9. direct-light-type backlight as claimed in claim 1 is characterized in that, reflector plate of the described end is made as white.
10. a liquid crystal indicator is characterized in that, comprises each described direct-light-type backlight of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205274305U CN202835058U (en) | 2012-10-15 | 2012-10-15 | Straight-down type backlight source and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205274305U CN202835058U (en) | 2012-10-15 | 2012-10-15 | Straight-down type backlight source and liquid crystal display device |
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| CN202835058U true CN202835058U (en) | 2013-03-27 |
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| CN2012205274305U Expired - Lifetime CN202835058U (en) | 2012-10-15 | 2012-10-15 | Straight-down type backlight source and liquid crystal display device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014201720A1 (en) * | 2013-06-21 | 2014-12-24 | 深圳市华星光电技术有限公司 | Direct-lit backlight module light strip assembly structure, assembly method, and liquid crystal display |
| CN105242453A (en) * | 2015-10-15 | 2016-01-13 | 广州创维平面显示科技有限公司 | Direct illumination-type backlight module and liquid crystal display device |
| CN106842709A (en) * | 2016-12-08 | 2017-06-13 | 环球智达科技（北京）有限公司 | A kind of assembly type backing structure |
| CN107577075A (en) * | 2016-07-04 | 2018-01-12 | Lg 电子株式会社 | Display device |
| CN109164631A (en) * | 2017-11-27 | 2019-01-08 | 苏州乐轩科技有限公司 | Direct type backlight module, display device and assembling method thereof |
| CN109859620A (en) * | 2019-03-11 | 2019-06-07 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN110632790A (en) * | 2019-08-26 | 2019-12-31 | 武汉华星光电技术有限公司 | Backlight module, preparation method thereof and display device thereof |
| WO2020098380A1 (en) * | 2018-11-16 | 2020-05-22 | 京东方科技集团股份有限公司 | Backplane, backlight module, and display device |
| CN111385505A (en) * | 2020-04-07 | 2020-07-07 | 海信视像科技股份有限公司 | Television set |
-
2012
- 2012-10-15 CN CN2012205274305U patent/CN202835058U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014201720A1 (en) * | 2013-06-21 | 2014-12-24 | 深圳市华星光电技术有限公司 | Direct-lit backlight module light strip assembly structure, assembly method, and liquid crystal display |
| CN105242453A (en) * | 2015-10-15 | 2016-01-13 | 广州创维平面显示科技有限公司 | Direct illumination-type backlight module and liquid crystal display device |
| CN107577075A (en) * | 2016-07-04 | 2018-01-12 | Lg 电子株式会社 | Display device |
| CN107577075B (en) * | 2016-07-04 | 2020-10-30 | Lg 电子株式会社 | Display device |
| CN106842709A (en) * | 2016-12-08 | 2017-06-13 | 环球智达科技（北京）有限公司 | A kind of assembly type backing structure |
| CN109164631A (en) * | 2017-11-27 | 2019-01-08 | 苏州乐轩科技有限公司 | Direct type backlight module, display device and assembling method thereof |
| WO2020098380A1 (en) * | 2018-11-16 | 2020-05-22 | 京东方科技集团股份有限公司 | Backplane, backlight module, and display device |
| US11243581B2 (en) | 2018-11-16 | 2022-02-08 | Beijing Boe Technology Development Co., Ltd. | Backplate, backlight module and display device |
| CN109859620A (en) * | 2019-03-11 | 2019-06-07 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN110632790A (en) * | 2019-08-26 | 2019-12-31 | 武汉华星光电技术有限公司 | Backlight module, preparation method thereof and display device thereof |
| CN111385505A (en) * | 2020-04-07 | 2020-07-07 | 海信视像科技股份有限公司 | Television set |
| CN111385505B (en) * | 2020-04-07 | 2023-05-05 | 海信视像科技股份有限公司 | Television set |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130327 |