CN101571264A - LED backlight module - Google Patents
LED backlight module Download PDFInfo
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- CN101571264A CN101571264A CNA2008100368535A CN200810036853A CN101571264A CN 101571264 A CN101571264 A CN 101571264A CN A2008100368535 A CNA2008100368535 A CN A2008100368535A CN 200810036853 A CN200810036853 A CN 200810036853A CN 101571264 A CN101571264 A CN 101571264A
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Abstract
The invention discloses an LED backlight module which comprises a light guide plate and at least one LED luminous source, wherein the light guide plate is at least provided with a light incidence surface; the LED luminous source is arranged opposite to the light incidence surface of the light guide plate; the LED luminous source is provided with a light emission surface facing to the light incidence surface of the light guide plate and at least arranged at one side of the light guide plate; the light emission surface of the LED luminous source forms an inclination angle of larger than 0 DEG and less than 90 DEG relatively to the light incidence surface of the light guide plate. The LED backlight module can reduce a mixed light distance between adjacent LEDs in the prior LED backlight source art, reduce and even eliminate a dark area, save the cost and reduce the heat emission of the module.
Description
Technical field
The present invention relates to a kind of LED-backlit module, the LED-backlit module that particularly a kind of liquid crystal indicator is used.
Background technology
Liquid crystal indicator has light weight, thin thickness, end power consumption and the little characteristics of radiation, has been widely used in fields such as information technology, multimedia technology, and becomes the main flow of various display unit gradually.Because liquid crystal panel itself is not luminous, need module backlight to provide light source for it.Because LED (light emitting diode) has pollution-free, long-life, vibration resistance, shock resistance and free of contamination characteristics, therefore, LED generally has been used for the module backlight of mobile phone, mobile phone, PDA, display screen.Because development of technology, make the brightness of LED that bigger lifting arranged in recent years, the alternative of large scale liquid crystal backlight sources of display device in having become, LED as the demand of liquid crystal indicator back light in continuous increase.
LED is as liquid crystal indicator source backlight, and in middle large scale, arrangement is the LED that arranges some in the one or both sides of Liquid Crystal Module back light unit, perhaps is arranged to straight-down negative in the large scale.
Fig. 1 is a kind of liquid crystal display structure schematic diagram of prior art side light type LED back light module.This device comprises LED light emitting source 10, a LGP 30, framework 40, a reflection unit 50, a liquid crystal display 100 and one group of blooming piece (not marking).Framework 40 is accommodated LGP 30, LED light emitting source 10, reflection unit 50, liquid crystal display 100 and blooming piece.LGP 30 has incidence surface, and the incidence surface of the reflecting surface of reflection unit 50 and LGP 30 is oppositely arranged, and LED light emitting source 10 is arranged between LGP 30 and the reflection unit 50.
Because of LED light emitting source 10 is spot lights, and the LED exiting surface has certain beam angle a, 10 of adjacent two LED light emitting sources are provided with a determining deviation, just mix with the light that adjacent LED light emitting source 10 sends after light that LED light emitting source 10 sends leaves LED light emitting source 10 exiting surface certain distances, light mixing distance is relevant with the spacing of 10 settings of adjacent LED light emitting source.Before adjacent two LED light emitting sources, 10 mixed lights, there is a dark space 20 in two 10 of LED light emitting sources.Therefore when satisfying the gray scale specification requirement, bigger as the spacing that is provided with between LED, then the light mixing distance between adjacent LED just increases, and the dark space also increases.In order to solve the dark space problem that exists before the big and mixed light of light mixing distance, a kind of method is increase LED light emitting source 10 quantity, reduces LED light emitting source 10 spacings.So not only increased cost, caused that module power consumption backlight increases, LED light emitting source 10 is many more simultaneously, and module caloric value backlight is big more, and module backlight is heavy more.Other method is exactly by increasing light mixing distance, make the dark space be distributed in LGP 30 with exterior domain, this will increase the size of module backlight, cause the increase of weight and cost, and but the excursion of light mixing distance is subjected to restrictions such as integrally-built maximum form factors, and is also very limited by increasing this method of light mixing distance.
Summary of the invention
The technical problem to be solved in the present invention is big and have the defective of dark space in order to overcome light mixing distance between adjacent two LED of prior art, provides a kind of and can effectively reduce light mixing distance, eliminates the LED-backlit module of the dark space that exists between two light emitting sources.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of LED-backlit module, it comprises a LGP and at least one LED light emitting source, this LGP has an incidence surface at least, this LED light emitting source has an exiting surface towards this LGP incidence surface, this LED light emitting source is arranged in this LGP one side at least, it is characterized in that the exiting surface of this LED light emitting source relatively incidence surface of this LGP becomes greater than 0 ° and is provided with less than 90 ° angle of inclination.
Wherein, this LED light emitting source also has an inclined-plane adjacent with this exiting surface, and this inclined-plane is provided with reflection diaphragm or the coating that light is had reflex.
Wherein, have some grooves that hold the LED light emitting source wholly or in part on this LGP incidence surface.
Wherein, this groove is shaped as L type or V-type.
Wherein, this LGP has a reflecting surface that links to each other with this incidence surface, and this reflecting surface is provided with reflection diaphragm or the coating to light tool reflex.
Wherein, the external form of this LED light emitting source has the exiting surface of inclination towards the incidence surface of this LGP, and the cross section of this LED light emitting source external form is trapezoidal or triangle.
Wherein, this LED light emitting source has a reflecting surface that links to each other with the exiting surface of this LED light emitting source, and this reflecting surface is provided with reflection diaphragm or the coating that light is had reflex.
Wherein, this LED light emitting source is arranged on the relative both sides or the adjacent both sides of this LGP, or is arranged on four sides of this LGP.
Wherein, this LED light emitting source is any or the two or more at least combination in white light LEDs, green light LED, red-light LED and the blue-ray LED.
Positive progressive effect of the present invention is:
1, effectively reduces in the existing LED-backlit source technology light mixing distance between adjacent LED;
2, eliminate the dark space that exists between the two adjacent LED light emitting sources;
3, adopt the present invention can reduce the usage quantity of LED light emitting source, thereby save cost, reduce the device heating.
Description of drawings
Fig. 1 is the liquid crystal indicator structure vertical view of LED-backlit module in the prior art.
Fig. 2 is a first embodiment of the invention liquid crystal indicator structure vertical view.
Fig. 3 is that led light source is arranged the improvement structural representation among Fig. 2.
Fig. 4 is that the LGP of LED-backlit module among Fig. 2 improves structural representation.
Fig. 5 is an A portion structure enlarged drawing among Fig. 4.
Fig. 6 is another improvement structural representation of LGP of LED-backlit module among Fig. 4.
Fig. 7 is a B portion structure enlarged drawing among Fig. 6.
Fig. 8 is the structure vertical view of second embodiment of the invention.
Fig. 9 is the improved structural representation of LED-backlit module among Fig. 8.
Figure 10 is the structural representation when the LED-backlit module is arranged in the LGP both sides among Fig. 2.
Figure 11 is the another kind of structural representation that the LED-backlit module is arranged in the LGP both sides among Fig. 2.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
Embodiment one
Fig. 2 is a first embodiment of the present invention structure vertical view, and as shown in Figure 2, this module 200 backlight comprises at least one LED light emitting source 201, a reflection unit 205, a rectangular light guide plate 202, a framework 203 and one group of blooming piece (not marking).LGP 202 has an incidence surface 204, and the incidence surface 204 of the reflecting surface of reflection unit 205 and LGP 202 is oppositely arranged.LED light emitting source 201 is arranged between reflection unit 205 and LGP 202 incidence surfaces 204, and the exiting surface of LED light emitting source 201 tilts and is provided with towards the incidence surface 204 of LGP 202 and the b that forms an angle, and angle b is greater than 0 ° and less than 90 °.
Fig. 3 is that LED light emitting source 201 is arranged improved structural representation among Fig. 2, as shown in Figure 3, with inclined-plane 220 that the exiting surface of LED light emitting source 201 links to each other on (just relative inclined-plane 220) with the exiting surface of adjacent LED light emitting source 201, be provided with the reflection diaphragm that has the high reflex of light, this reflection diaphragm can be bonded at and also can be bonded on the inclined-plane 220 of LED light emitting source 201 on the LGP 202 corresponding with LED light emitting source 201.Can also smear one deck has high reflex to light coating on the inclined-plane 220 or on the LGP 202 corresponding with this inclined-plane 220.Like this, the light that sends of adjacent LED light emitting source 201 just enters LGP 202 after through inclined-plane 220 reflections.Use this structure, can reduce, the light loss the when light that LED light emitting source 201 sends fails all to incide the incidence surface 204 of LGP 202 because of angle b when big.
As Fig. 4 to shown in Figure 5, with the incidence surface 226 of this LGP 222 of LED light emitting source 201 opposite positions on, have the V-type groove that holds LED light emitting source 201 wholly or in part, LED light emitting source 201 places in this groove wholly or in part.The shape of this groove also can be other L type or other geometry that can hold LED light emitting source 201 wholly or in part.
Extremely shown in Figure 7 as Fig. 6, in order to save cost, reduce the light loss of adjacent LED light emitting source 201, behind fluting on the incidence surface 226 of LGP 222, form Fig. 6 as sticking the reflection diaphragm of the high reflex of light tool on the reflecting surface 227 that shows with incidence surface 225 links to each other or coating coating, make 227 pairs of high reflexs of light tool of reflecting surface the high reflex of light tool.Like this, the reflection of the reflecting surface 227 by posting reflection diaphragm or reflectance coating, just can reduce the light loss of adjacent LED light emitting source 201, just can save reflection unit 205 among Fig. 4, form the module backlight that does not contain reflection unit 205 as shown in Figure 6 to save cost.
Embodiment two
As shown in Figure 8, module backlight of the present invention comprises: at least one LED light emitting source 310, the external form of this LED light emitting source 310 have the exiting surface of an inclination towards the incidence surface 204 of LGP 202; One reflection unit 205, a LGP 202, a framework 203 and one group of blooming piece (not marking).LED light emitting source 310 is arranged between the incidence surface 204 of reflection unit 205 and LGP 202, and the exiting surface of LED light emitting source 310 tilts towards the incidence surface 204 of LGP 202.In the present embodiment, the external form cross section of LED light emitting source 310 is trapezoidal.
Fig. 9 is another improvement structural representation of LED light emitting source 310 among Fig. 8, as shown in Figure 9, LED light emitting source 320 external forms of this structure have the exiting surface and a reflecting surface that links to each other with exiting surface 230 of an oblique side, by on this reflecting surface 230, adhering to the reflection diaphragm that light is had high reflex, or on this reflecting surface 230, smear the coating of the high reflex of a pair of smooth tool, and make 230 pairs of light of this reflecting surface have high reflex.Like this, when the light that sends when adjacent LED light emitting source 320 incided reflecting surface 230,230 reflections just entered LGP 202 through reflecting surface, have reduced the light loss of adjacent LED light emitting source 320.In the present embodiment, the external form cross section of this LED light emitting source 320 is triangular in shape, and the external form cross section of this LED light emitting source 310 can also be that other contains inclination polyhedron-shaped towards the exiting surface of the incidence surface 204 of LGP 202.
Figure 10～Figure 11 is two kinds of different inclination mode schematic diagrames that LED light emitting source 201 are arranged in LGP 202 relative both sides, and the arrangement of this kind LED light emitting source 201 all can adopt in first embodiment or second embodiment.
In the present embodiment, the LED light emitting source can be any or the two or more at least combination in white light LEDs, green light LED, red-light LED, the blue-ray LED.
In the present embodiment, the external form of LED light emitting source is not limited to pattern shown in this figure and position.The LED light emitting source can also be arranged in relative both sides or the adjacent both sides or four sides of LGP.
Above-mentioned LED-backlit module can also be as other application of light source except being used for liquid crystal indicator, such as: directly as illumination light source.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these embodiments.Therefore, protection scope of the present invention is limited by appended claims.
Claims (9)
1, a kind of LED-backlit module, it comprises a LGP and at least one LED light emitting source, this LGP has an incidence surface at least, this LED light emitting source has an exiting surface towards this LGP incidence surface, this LED light emitting source is arranged in this LGP one side at least, it is characterized in that the exiting surface of this LED light emitting source relatively incidence surface of this LGP becomes greater than 0 ° and is provided with less than 90 ° angle of inclination.
2, LED-backlit module as claimed in claim 1 is characterized in that, this LED light emitting source also has an inclined-plane adjacent with this exiting surface, and this inclined-plane is provided with reflection diaphragm or the coating that light is had reflex.
3, LED-backlit module as claimed in claim 1 is characterized in that, has some grooves that hold the LED light emitting source wholly or in part on this incidence surface.
4, LED-backlit module as claimed in claim 3 is characterized in that, this groove be shaped as L type or V-type.
5, LED-backlit module as claimed in claim 4 is characterized in that, this LGP has a reflecting surface that links to each other with this incidence surface, and this reflecting surface is provided with reflection diaphragm or the coating to light tool reflex.
6, LED-backlit module as claimed in claim 1 is characterized in that, the external form of this LED light emitting source has the exiting surface of inclination towards the incidence surface of this LGP, and the cross section of this LED light emitting source external form is trapezoidal or triangle.
7, LED-backlit module as claimed in claim 6 is characterized in that, this LED light emitting source has a reflecting surface that links to each other with the exiting surface of this LED light emitting source, and this reflecting surface is provided with reflection diaphragm or the coating that light is had reflex.
8, as any described LED-backlit module in the claim 1 to 7, it is characterized in that this LED light emitting source is arranged on the relative both sides or the adjacent both sides of this LGP, or be arranged on four sides of this LGP.
9, LED-backlit module as claimed in claim 8 is characterized in that, this LED light emitting source is any or the two or more at least combination in white light LEDs, green light LED, red-light LED and the blue-ray LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810036853.5A CN101571264B (en) | 2008-04-30 | 2008-04-30 | LED backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810036853.5A CN101571264B (en) | 2008-04-30 | 2008-04-30 | LED backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571264A true CN101571264A (en) | 2009-11-04 |
| CN101571264B CN101571264B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810036853.5A Active CN101571264B (en) | 2008-04-30 | 2008-04-30 | LED backlight module |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221164A (en) * | 2011-05-17 | 2011-10-19 | 广州创维平面显示科技有限公司 | Backlight module and liquid crystal display device |
| CN102278675A (en) * | 2011-08-26 | 2011-12-14 | 广东长虹电子有限公司 | Backlight module and light guide plate thereof |
| CN102506361A (en) * | 2011-11-22 | 2012-06-20 | 南京中电熊猫液晶显示科技有限公司 | LED backlight module |
| CN102620194A (en) * | 2012-03-12 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| WO2013120268A1 (en) * | 2012-02-15 | 2013-08-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| TWI421445B (en) * | 2011-08-10 | 2014-01-01 | Radiant Opto Electronics Corp | Light source module |
| CN103632615A (en) * | 2012-08-23 | 2014-03-12 | 群康科技(深圳)有限公司 | Displayer |
| CN104613389A (en) * | 2015-03-02 | 2015-05-13 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device with backlight module |
| CN106249344A (en) * | 2016-10-20 | 2016-12-21 | 武汉华星光电技术有限公司 | Display device, backlight module and light guide plate thereof |
| CN106773310A (en) * | 2017-01-03 | 2017-05-31 | 京东方科技集团股份有限公司 | A kind of lamp bar, backlight module and display device |
| CN106896584A (en) * | 2017-05-05 | 2017-06-27 | 武汉华星光电技术有限公司 | LED light bar and backlight assembly |
| CN109212659A (en) * | 2018-09-05 | 2019-01-15 | 杭州游闻网络科技有限公司 | A kind of edge-type light guide plate and backlight module |
| CN114967230A (en) * | 2022-05-06 | 2022-08-30 | 惠科股份有限公司 | Backlight module and display device |
-
2008
- 2008-04-30 CN CN200810036853.5A patent/CN101571264B/en active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221164A (en) * | 2011-05-17 | 2011-10-19 | 广州创维平面显示科技有限公司 | Backlight module and liquid crystal display device |
| TWI421445B (en) * | 2011-08-10 | 2014-01-01 | Radiant Opto Electronics Corp | Light source module |
| CN102278675A (en) * | 2011-08-26 | 2011-12-14 | 广东长虹电子有限公司 | Backlight module and light guide plate thereof |
| CN102506361A (en) * | 2011-11-22 | 2012-06-20 | 南京中电熊猫液晶显示科技有限公司 | LED backlight module |
| WO2013120268A1 (en) * | 2012-02-15 | 2013-08-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102620194A (en) * | 2012-03-12 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN103632615A (en) * | 2012-08-23 | 2014-03-12 | 群康科技(深圳)有限公司 | Displayer |
| CN104613389A (en) * | 2015-03-02 | 2015-05-13 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device with backlight module |
| CN106249344A (en) * | 2016-10-20 | 2016-12-21 | 武汉华星光电技术有限公司 | Display device, backlight module and light guide plate thereof |
| CN106773310A (en) * | 2017-01-03 | 2017-05-31 | 京东方科技集团股份有限公司 | A kind of lamp bar, backlight module and display device |
| CN106896584A (en) * | 2017-05-05 | 2017-06-27 | 武汉华星光电技术有限公司 | LED light bar and backlight assembly |
| CN109212659A (en) * | 2018-09-05 | 2019-01-15 | 杭州游闻网络科技有限公司 | A kind of edge-type light guide plate and backlight module |
| CN109212659B (en) * | 2018-09-05 | 2020-10-20 | 伟志光电（深圳）有限公司 | Side income formula light guide plate and backlight unit |
| CN114967230A (en) * | 2022-05-06 | 2022-08-30 | 惠科股份有限公司 | Backlight module and display device |
| US11754880B1 (en) | 2022-05-06 | 2023-09-12 | HKC Corporation Limited | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101571264B (en) | 2014-04-16 |
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Owner name: SHANGHAI ZHONGHANG OPTOELECTRONICS CO., LTD. Free format text: FORMER OWNER: SHANGHAI SVA NEC LIQUID CRYSTAL DISPLAY CO., LTD. Effective date: 20100325 |
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Free format text: CORRECT: ADDRESS; FROM: 201108 NO.3388, HUANING ROAD, MINHANG DISTRICT, SHANGHAI CITY TO: 201108 NO.3388, HUANING ROAD, SHANGHAI CITY |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20100325 Address after: 201108 Shanghai City Huaning Road No. 3388 Applicant after: Shanghai AVIC Optoelectronics Co., Ltd. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3388 Applicant before: Shanghai SVA-NEC Liquid Crystal Display Co. Ltd. |
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