CN101571264B - LED backlight module - Google Patents
LED backlight module Download PDFInfo
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- CN101571264B CN101571264B CN200810036853.5A CN200810036853A CN101571264B CN 101571264 B CN101571264 B CN 101571264B CN 200810036853 A CN200810036853 A CN 200810036853A CN 101571264 B CN101571264 B CN 101571264B
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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 that quality is light, thin thickness, end power consumption and the little feature of radiation, has been widely used in the fields such as infotech, multimedia technology, and has become gradually the main flow of various display device.Because liquid crystal panel itself is not luminous, need backlight module to provide light source for it.Because LED (light emitting diode) has pollution-free, long-life, vibration resistance, shock resistance and free of contamination feature, therefore, LED has been widely used in the backlight module of mobile phone, mobile phone, PDA, display screen.Due to the progress of technology, make the brightness of LED have larger lifting in recent years, become the alternative of middle large scale liquid crystal backlight sources of display device, LED as the demand of LCD device backlight light source in continuous increase.
LED originates as LCD device backlight, and in middle large scale, arrangement is in the one or both sides of Liquid Crystal Module back light unit, to arrange the LED of some, or in large scale, is arranged to straight-down negative.
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 light guide plate 30, framework 40, a reflection unit 50, a liquid crystal display 100 and one group of blooming piece (not marking).Framework 40 is accommodated light guide plate 30, LED light emitting source 10, reflection unit 50, liquid crystal display 100 and blooming piece.Light guide plate 30 has incidence surface, and the incidence surface of the reflecting surface of reflection unit 50 and light guide plate 30 is oppositely arranged, and LED light emitting source 10 is arranged between light guide plate 30 and reflection unit 50.
Because LED light emitting source 10 is pointolites, and LED exiting surface has certain beam angle a, 10 of adjacent two LED light emitting sources arrange a determining deviation, the light just sending with adjacent LED light emitting source 10 after light that LED light emitting source 10 sends leaves LED light emitting source 10 exiting surface certain distances mixes, and light mixing distance is relevant to the spacing of 10 settings of adjacent LED light emitting source.Before adjacent two LED light emitting source 10 mixed lights, there is a dark space 20 in two 10 of LED light emitting sources.Therefore when meeting gray scale specification requirement, as larger in the spacing arranging between LED, the light mixing distance between adjacent LED just increases, and dark space also increases.In order to solve light mixing distance greatly and the dark space problem existing before mixed light, a kind of method is to increase LED light emitting source 10 quantity, reduces LED light emitting source 10 spacing.So not only increased cost, caused that backlight module power consumption increases, while LED light emitting source more than 10, backlight module thermal value is larger, and backlight module is heavier.Other method is exactly by increasing light mixing distance, make dark space be distributed in light guide plate 30 with exterior domain, this will increase the size of backlight module, cause the increase of weight and cost, and light mixing distance can variation range be subject to the restrictions such as integrally-built maximum form factors, 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 in order to overcome the large defect with there is dark space of light mixing distance between adjacent two LED of prior art, to provide a kind of and can effectively reduce light mixing distance, eliminate the LED-backlit module of the dark space existing between two light emitting sources.
The present invention solves above-mentioned technical matters by following technical proposals: a kind of LED-backlit module, it comprises a light guide plate and at least one LED light emitting source, this light guide plate has an incidence surface at least, this LED light emitting source has an exiting surface towards this light guide plate incidence surface, this LED light emitting source is at least arranged in this light guide plate one side, it is characterized in that, the exiting surface of this LED light emitting source becomes to be greater than 0 ° and be less than the angle of inclination of 90 ° and arrange with respect to the incidence surface of this light guide plate.
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 to reflex.
Wherein, on this light guide plate incidence surface, have some grooves that hold wholly or in part LED light emitting source.
Wherein, this groove is shaped as L-type or V-type.
Wherein, this light guide plate has a reflecting surface being connected 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 towards the incidence surface of this light guide plate, and the xsect of this LED light emitting source external form is trapezoidal or triangle.
Wherein, this LED light emitting source has a reflecting surface being connected 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 to reflex.
Wherein, this LED light emitting source is arranged on relative both sides or the adjacent both sides of this light guide plate, or is arranged on four sides of this light guide plate.
Wherein, this LED light emitting source is any or at least two or more combination in white light LEDs, green light LED, red-light LED and blue-ray LED.
Positive progressive effect of the present invention is:
1, effectively reduce in existing LED-backlit source technology light mixing distance between adjacent LED;
2, eliminate the dark space existing between 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 device heating.
Accompanying drawing explanation
Fig. 1 is the LCD device structure vertical view of LED-backlit module in prior art.
Fig. 2 is first embodiment of the invention LCD device structure vertical view.
Fig. 3 is that in Fig. 2, LED light source is arranged improvement structural representation.
Fig. 4 is that the light guide plate of LED-backlit module in Fig. 2 is improved structural representation.
Fig. 5 is A portion structure enlarged drawing in Fig. 4.
Fig. 6 is another improvement structural representation of light guide plate of LED-backlit module in Fig. 4.
Fig. 7 is B portion structure enlarged drawing in 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 in Fig. 8.
Figure 10 is structural representation when LED-backlit module is arranged in light guide plate both sides in Fig. 2.
Figure 11 is the another kind of structural representation that in Fig. 2, LED-backlit module is arranged in light guide plate both sides.
Embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present invention, to describe technical scheme of the present invention in detail.
Embodiment mono-
Fig. 2 is first embodiment of the present invention structure vertical view, and as shown in Figure 2, this backlight module 200 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).Light guide plate 202 has an incidence surface 204, and the incidence surface 204 of the reflecting surface of reflection unit 205 and light guide plate 202 is oppositely arranged.LED light emitting source 201 is arranged between reflection unit 205 and light guide plate 202 incidence surfaces 204, and the exiting surface of LED light emitting source 201 tilts and to arrange towards the incidence surface 204 of light guide plate 202 and the b that forms an angle, and angle b is greater than 0 ° and be less than 90 °.
Fig. 3 is that in Fig. 2, LED light emitting source 201 is arranged improved structural representation, as shown in Figure 3, on the connected inclined-plane 220 of the exiting surface with LED light emitting source 201 (the namely inclined-plane 220 relative with the exiting surface of adjacent LED light emitting source 201), be provided with the reflection diaphragm having the high reflex of light, this reflection diaphragm can be bonded on the inclined-plane 220 of LED light emitting source 201 and also can be bonded in the light guide plate corresponding with LED light emitting source 201 202.Can also or smear one deck in the light guide plate 202 corresponding with this inclined-plane 220 on inclined-plane 220 and light be had to the coating of high reflex.Like this, the light that adjacent LED light emitting source 201 sends just enters light guide plate 202 after inclined-plane 220 reflections.Use this structure, can reduce because angle b is when larger, the light loss when light that LED light emitting source 201 sends fails all to incide the incidence surface 204 of light guide plate 202.
As shown in Fig. 4 to Fig. 5, on the incidence surface 226 of this light guide plate 222 with LED light emitting source 201 opposite positions, have the V-type groove that holds wholly or in part LED light emitting source 201, LED light emitting source 201 is placed in this groove wholly or in part.The shape of this groove can be also other L-type or other geometric configuration that can hold wholly or in part LED light emitting source 201.
As shown in Figure 6 to 7, in order to save cost, reduce the light loss of adjacent LED light emitting source 201, after slotting on the incidence surface 226 of light guide plate 222, form Fig. 6 as sticked the reflection diaphragm of the high reflex of light tool on the reflecting surface 227 being connected with incidence surface 225 showing or coating the coating to the high reflex of light tool, make 227 pairs of high reflexs of light tool of reflecting surface.Like this, by posting the reflection of the reflecting surface 227 of reflection diaphragm or reflectance coating, just can reduce the light loss of adjacent LED light emitting source 201, just can save reflection unit 205 in Fig. 4 with cost-saving, form as shown in Figure 6 not containing the backlight module of reflection unit 205.
Embodiment bis-
As shown in Figure 8, backlight module of the present invention comprises: at least one LED light emitting source 310, and the external form of this LED light emitting source 310 has an inclination towards the exiting surface of the incidence surface 204 of light guide plate 202; One reflection unit 205, a light guide plate 202, a framework 203 and one group of blooming piece (not marking).LED light emitting source 310 is arranged between reflection unit 205 and the incidence surface 204 of light guide plate 202, and the exiting surface of LED light emitting source 310 tilts towards the incidence surface 204 of light guide plate 202.In the present embodiment, the external form xsect of LED light emitting source 310 is trapezoidal.
Fig. 9 is another improvement structural representation of LED light emitting source 310 in 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 being connected with exiting surface 230 of an oblique side, by adhere to the reflection diaphragm that light is had to high reflex on this reflecting surface 230, or smear the coating of the high reflex of a pair of smooth tool on this reflecting surface 230, and make 230 pairs of light of this reflecting surface there is high reflex.Like this, when the light sending when adjacent LED light emitting source 320 incides reflecting surface 230, through reflecting surface, 230 reflections just enter light guide plate 202, have reduced the light loss of adjacent LED light emitting source 320.In the present embodiment, the external form xsect of this LED light emitting source 320 is triangular in shape, and the external form xsect of this LED light emitting source 310 can also be that other contains polyhedron-shaped towards the exiting surface of the incidence surface 204 of light guide plate 202 of tilting.
Figure 10～Figure 11 is arranged in LED light emitting source 201 two kinds of different inclination mode schematic diagram on light guide plate 202 relative both sides, and the arrangement of this kind of LED light emitting source 201 all can adopt in the first embodiment or the second embodiment.
In the present embodiment, LED light emitting source can be any or at least two or more combination in white light LEDs, green light LED, red-light LED, 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.LED light emitting source can also be arranged in relative both sides or adjacent both sides or four sides of light guide plate.
Above-mentioned LED-backlit module is except for liquid crystal indicator, can also be as other application of light source, such as: directly as illumination light source.
Although 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, do not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments.Therefore, protection scope of the present invention is limited by appended claims.
Claims (9)
1. a LED-backlit module, it comprises a light guide plate and at least one LED light emitting source, this light guide plate has an incidence surface at least, this LED light emitting source has an exiting surface towards this light guide plate incidence surface, this LED light emitting source is at least arranged in this light guide plate one side, the exiting surface of this LED light emitting source becomes to be greater than 0 ° and be less than the angle of inclination of 90 ° and arrange with respect to the incidence surface of this light guide plate, this LED light emitting source is at least two, this LED light emitting source also has an inclined-plane adjacent with this exiting surface, it is characterized in that, the exiting surface of adjacent two described LED light emitting sources tilts in the same way, the inclined-plane connected with the exiting surface of last LED light emitting source is relative with the exiting surface of a rear LED light emitting source, a part of light that a described rear LED light emitting source is sent is irradiated to on connected and relative with the exiting surface of the described rear LED light emitting source inclined-plane of the exiting surface of described last LED light emitting source, this inclined-plane is provided with reflection diaphragm or the coating that light is had to reflex, by being provided with the inclined-plane of reflection diaphragm or reflectance coating, reduced the light loss of adjacent LED light emitting source.
2. LED-backlit module as claimed in claim 1, is characterized in that, this LED light emitting source is arranged on relative both sides or the adjacent both sides of this light guide plate, or is arranged on four sides of this light guide plate.
3. LED-backlit module as claimed in claim 2, is characterized in that, this LED light emitting source is any or at least two or more combination in white light LEDs, green light LED, red-light LED and blue-ray LED.
4. a LED-backlit module, it comprises a light guide plate and at least one LED light emitting source, this light guide plate has an incidence surface at least, this LED light emitting source has an exiting surface towards this light guide plate incidence surface, this LED light emitting source is at least arranged in this light guide plate one side, the exiting surface of this LED light emitting source becomes to be greater than 0 ° and be less than the angle of inclination of 90 ° and arrange with respect to the incidence surface of this light guide plate, this LED light emitting source is at least two, it is characterized in that, the exiting surface of adjacent two described LED light emitting sources tilts in the same way, on this incidence surface, have some grooves that hold wholly or in part LED light emitting source, this groove be shaped as L-type or V-type, formation is positioned at incidence surface relative with the exiting surface of this LED light emitting source on groove, and be positioned at this reflecting surface that incidence surface relative with the exiting surface of this LED light emitting source on groove is connected, the reflecting surface that the incidence surface relative with the exiting surface of last LED light emitting source is connected is relative with the exiting surface of a rear LED light emitting source, a part of light that a described rear LED light emitting source is sent is irradiated to this and is positioned on connected and relative with the exiting surface of the described rear LED light emitting source reflecting surface of incidence surface relative with the exiting surface of described last LED light emitting source on groove, this reflecting surface is provided with reflection diaphragm or the coating to light tool reflex, by posting the reflecting surface of reflection diaphragm or reflectance coating, reduced the light loss of adjacent LED light emitting source.
5. LED-backlit module as claimed in claim 4, is characterized in that, this LED light emitting source is arranged on relative both sides or the adjacent both sides of this light guide plate, or is arranged on four sides of this light guide plate.
6. LED-backlit module as claimed in claim 5, is characterized in that, this LED light emitting source is any or at least two or more combination in white light LEDs, green light LED, red-light LED and blue-ray LED.
7. a LED-backlit module, it comprises a light guide plate and at least one LED light emitting source, this light guide plate has an incidence surface at least, this LED light emitting source has an exiting surface towards this light guide plate incidence surface, this LED light emitting source is at least arranged in this light guide plate one side, the exiting surface of this LED light emitting source becomes to be greater than 0 ° and be less than the angle of inclination of 90 ° and arrange with respect to the incidence surface of this light guide plate, this LED light emitting source is at least two, the external form of this LED light emitting source has the exiting surface towards the incidence surface of this light guide plate, it is characterized in that, the exiting surface of adjacent two described LED light emitting sources tilts in the same way, the xsect of this LED light emitting source external form is trapezoidal or triangle, this LED light emitting source has a reflecting surface being connected with the exiting surface of this LED light emitting source, the reflecting surface of last LED light emitting source is relative with the exiting surface of a rear LED light emitting source, a part of light that a described rear LED light emitting source is sent is irradiated to on connected and relative with the exiting surface of the described rear LED light emitting source reflecting surface of the exiting surface of described last LED light emitting source, this reflecting surface is provided with reflection diaphragm or the coating that light is had to reflex, by posting the reflecting surface of reflection diaphragm or reflectance coating, reduced the light loss of adjacent LED light emitting source.
8. LED-backlit module as claimed in claim 7, is characterized in that, this LED light emitting source is arranged on relative both sides or the adjacent both sides of this light guide plate, or is arranged on four sides of this light guide plate.
9. LED-backlit module as claimed in claim 8, is characterized in that, this LED light emitting source is any or at least two or more combination in white light LEDs, green light LED, red-light LED and 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 CN101571264A (en) | 2009-11-04 |
| CN101571264B true CN101571264B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810036853.5A Active CN101571264B (en) | 2008-04-30 | 2008-04-30 | LED backlight module |
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Families Citing this family (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 |
| 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 |
| CN102588838A (en) * | 2012-02-15 | 2012-07-18 | 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 |
| 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 |
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2008
- 2008-04-30 CN CN200810036853.5A patent/CN101571264B/en active Active
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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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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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