CN2752810Y - Reflector structure of straight-down back light module for raising reflective uniform brightness - Google Patents
Reflector structure of straight-down back light module for raising reflective uniform brightness Download PDFInfo
- Publication number
- CN2752810Y CN2752810Y CN 200420118188 CN200420118188U CN2752810Y CN 2752810 Y CN2752810 Y CN 2752810Y CN 200420118188 CN200420118188 CN 200420118188 CN 200420118188 U CN200420118188 U CN 200420118188U CN 2752810 Y CN2752810 Y CN 2752810Y
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- China
- Prior art keywords
- reflector plate
- light source
- backlight module
- reflection
- light
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Abstract
The utility model discloses a reflector structure of a straight-down back light module for raising reflective uniform brightness, which is positioned below a plurality of light sources. The reflector is provided with a saw-tooth surface, and the saw-tooth angle of the saw-tooth surface becomes small from big according to the size of the distance of the light sources and the saw-tooth surface. Thus, the light uniformity of reflection rays is raised and the light sources and both sides of the reflector plate are provided with connecting pieces. When connected with the reflector, the connecting pieces have an angle; by a slope design, the utility model characteristic of the light sources is provided.
Description
Technical field
The utility model refers in particular to a kind of uniformity coefficient of its reflection of light that increases to improve the reflector plate structure of the direct type backlight module that reflects uniform luminance relevant for a kind of structure of reflector plate.
Background technology
General back light is a light source required when being used to provide the liquid crystal display displays image, different along with LCD size and structure, the backlight module of the different kenels of just need arranging in pairs or groups, as more small-sized LCD as long as illuminate with pointolite, the display of the mobile phone in the communication product is to throw with this type of pointolite, and it is to the quality and the light source uniformity requirement and little of video picture.And in the middle escope of general large-size such as the LCD of mobile computer and individual desktop PC etc., typically using line source satisfies required brightness, and the LCD of large-size must be used the line source of a greater number.
Because the increasing of display sizes just more highlights even brightness importance, and derives the design problem of backlight module.Along with light source is arranged on the difference of the position in the backlight module, backlight module is common design kenels such as side-light type, straight-down negative.
Consult Fig. 1, usually the design packet of side light type back light module 1 ' contains a from top to bottom folded in regular turn lamina rara externa 10 ', a prismatic lens 11 ', a diffuser plate 12 ', a light guide plate 13 ' and a reflecting plate 15 ' of establishing, and be provided with a linear light source 14 ' in this light guide plate 13 ' side end, this light guide plate 13 ' of mat makes the light of light source 14 ' penetrate towards the one side diffusion of this diffuser plate 12 ' through predetermined communication process, and then, provide the required light of display that is arranged at backlight module 1 ' top by this by aforementioned prismatic lens 11 '.This prismatic lens 11 ' can be monolithic, biplate with the needs of design, also can not use, and its surface is preset with most parallel chases, the arrangement of chase can be directly to or laterally.This lamina rara externa 10 ' can be diffuser plate, fender, blast plate.
The light source 14 ' of this type of side light type back light module 1 ' is to be positioned at light guide plate 13 ' edge, via light guide plate 13 ' conducting light, and be equipped with in the reflection version 15 ' of light guide plate 13 ' bottom light is up reflected, the advantage of this kind side light type back light module 1 ' is the position that is difficult for obviously recognizing light source 14 ', but its luminance range.
Consult Fig. 2, the design of general direct type backlight module, it is the light guide plate of having omitted side light type back light module, complicated and expensive optical sheet such as prismatic lens, its light source 14 ' is arranged between reflecting plate 15 ' and diffuser plate 12 ', the reflex of utilizing reflecting plate 15 ' to provide, make light transfer to the LCD that is arranged on backlight module 1 ' top via diffuser plate 12 ', the light that light source 14 ' sent that utilizes reflecting plate 15 ' directly will be positioned at its top up reflects, can make display obtain preferable brightness by this, but cause more easily telling the light source position, just the brightness of light source 14 ' position is obviously brighter than other place.Therefore how making the light source homogenising of direct type backlight module by the optical design of reflecting plate 15 ', promptly is a great problem.
Consult Fig. 3, it is tabular and to have a plurality of light sources 14 be example to be level with the reflecting plate 15 ' of direct type backlight module, diffuser plate 12 ' position corresponding to light source 14 square places can be the brightest, and can be the darkest near the middle place 16 ' of two adjacent light sources 14 ', its reason be two adjacent light sources 14 ' in the middle of the place 16 ' farthest apart from light source 14 ', can receive light source 14 ' light intensity just can be a little less than, and the only simple cremasteric reflex function of flat reflecting plate 15 ', therefore light source 14 ' sends the down light of projection, do not locate near effect concentrated 16 ' in the middle of not possessing past adjacent light source 14 ', locate near the brightness 16 in the middle of nature can't be strengthened.
Shown in Figure 4, with the reflecting plate 15 ' of direct type backlight module be tortuous tabular be example, reflecting plate 15 ' has a plurality of reflector elements 151 ' that correspond respectively to these line source 14 ' belows, each reflector element 151 ' has the swash plate portion 152 ' that two front and back are extended and are connected, this swash plate portion 152 ' is by forming outward and toward the extension that tilts respectively under the light source 14 ', the design of this kind reflecting plate 15 ', can directly light source 14 ' be sent down light toward reflecting near light source 14 ' position, therefore can increase brightness, but and be helpless to the homogeneity of brightness, that is to say can't strengthen equally adjacent light source 14 ' in the middle of near the place 16 ' brightness.
About the various different designs of above-mentioned direct type backlight module, be found in many patent cases, as United States Patent (USP) case 5,567,042,5,479,328,5,134,553,20020057405,20020039292,4,425,604,6,407,781,5,253,151,6,09 5,656 etc., various designs have configuration of its different structure and effect demand, otherness to some extent on the degree of difficulty of making.
Therefore, how a kind of novel reflector plate structure that improves the direct type backlight module of reflection uniform luminance is proposed at the problems referred to above, improve tradition and can't strengthen the middle shortcoming of locating near brightness of adjacent light source, be not to use for a long time the person eagerly to look forward to always, and the design people is based on the research of engaging in Related product for many years, practical experience such as exploitation, be to think and improved idea, poor its people's professional knowledge, through research and design in many ways, special topic is inquired into, finally work out a kind of reflector plate structure that improves the direct type backlight module of reflection uniform luminance, can solve the above problems.
The utility model content
The technical problems to be solved in the utility model is: a kind of reflector plate structure that improves the direct type backlight module of reflection uniform luminance is provided, and it uses a reflector plate to make bottom-lighting type back light module improve a catoptrical uniform luminance.
Another technical matters to be solved in the utility model is: a kind of reflector plate structure that improves the direct type backlight module of reflection uniform luminance is provided, it uses a connecting piece, when being connected this reflector plate with this reflector plate owing to this brace, a plurality of light sources have a slope to connect, to increase catoptrical uniform luminance.
Technical solution of the present utility model is: a kind of reflector plate structure that improves the direct type backlight module of reflection uniform luminance, it comprises: a reflector plate, this reflector plate is positioned at the below of a plurality of light sources, this reflector plate has hackly surface, and the sawtooth angle of this hackly surface is from large to small according to the distance apart from this light source.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein be positioned at this light source under reflector plate hackly surface can make an emergent light come from the time through this hackly surface, a reflection source can be avoided this light source ground and be provided with.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein this be positioned at this light source under hackly surface can be a circular surface.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein this be positioned at this light source under hackly surface can be an oblong surface.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein this be positioned at this light source under hackly surface can be a non-spherical surface.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein this be positioned at this light source under hackly surface can be a triangular surface.
The reflector plate structure of the direct type backlight module of aforesaid raising reflection uniform luminance, wherein the dual-side of this reflector plate and this light source comprises a connecting piece, and this brace and this reflector plate have a reflection angle and change an edge reflection of light angle to utilize slope.
By said structure, the reflector plate structure of the direct type backlight module of raising reflection uniform luminance of the present utility model, the slope that its this reflector plate has according to the distance of distance light source is by big and little, to improve the light uniformity coefficient of reflection ray, moreover, cording has brace in the both sides of light source and this reflector plate, and this brace has an angle when connecting this reflector plate, and the design that sees through this slope is to provide the usability of light source.
Description of drawings
Fig. 1 is the structural representation of the backlight module of known technology;
Fig. 2 is the structural representation of the direct type backlight module of known technology;
Fig. 3 is flat structural representation for the reflecting plate of the direct type backlight module of known technology;
Fig. 4 is jagged structural representation for the reflecting plate of the direct type backlight module of known technology;
Fig. 5 is the structural representation of the reflector plate of a specific embodiment of the present utility model;
Fig. 6 is the structural representation of the reflector plate of another specific embodiment of the present utility model;
Fig. 7 is the opticpath synoptic diagram of the reflector plate of a specific embodiment of the present utility model;
Fig. 8 is the opticpath synoptic diagram of the reflector plate of another specific embodiment of the present utility model; And
Fig. 9 is the reflector plate of a specific embodiment of the present utility model and the structural representation of brace.
The drawing reference numeral explanation:
1 ' backlight module, 10 ' lamina rara externa, 11 ' prismatic lens, 12 ' diffuser plate
Place in the middle of 13 ' light guide plate, 14 ' light source, the 15 ' reflected ray 16 '
151 ' reflector element, 152 ' swash plate portion
1 backlight module, 10 reflecting plates, 12 hackly surfaces, 13 emergent raies
Place's 30 diffuser plates in the middle of 14 reflection rays, 20 light sources 22
40 brace θ, 1 slope θ, 2 slope θ, 3 slopes
Embodiment
Now further understand and understanding for architectural feature of the present utility model and the effect reached are had, sincerely help with specific embodiment and the detailed explanation of conjunction with figs., illustrate as after:
The utility model improves the shortcoming of known reflector plate, the reflector plate of the direct type backlight module of known technology can't be strengthened near the brightness in middle place of adjacent light source, be that jagged reflector plate and parabolical reflector plate all can't increase the brightness of locating in the middle of it, because direct type backlight module has a plurality of light sources, place in the middle of two light sources necessarily have one, the brightness at this place, centre is necessarily minimum, the reflector plate that is positioned at the below this moment is necessarily the most weak in the reflection ray at this place, centre, so its reflection ray can't be reached homogenising, so the utility model provides the structure of a reflector plate, to increase the intensity and the uniformity coefficient of the reflection ray of locating in the middle of it.
See also Fig. 5, it is the structural representation of the reflector plate of a specific embodiment of the present utility model; As shown in the figure, a kind of reflector plate structure that improves the direct type backlight module of reflection uniform luminance of the present utility model, the primary structure of its direct type backlight module 1 comprises a reflecting plate 10, a plurality of light source 20 and a diffuser plate 30; Wherein these a plurality of light sources 20 are positioned at the top of this reflecting plate 10, this diffuser plate 30 is positioned at the top of these a plurality of light sources 20, and this reflector plate 10 has hackly surface 12, each sawtooth of this hackly surface 12 has different slopes with respect to the distance apart from this light source, when this reflecting plate 10 is just healed big apart from the slope of these light source 20 these hackly surfaces 12 far away, heal when near apart from this light source when this reflecting plate 10, the slope of this hackly surface 12 is just little, so θ 1＞θ 2; Moreover, when this reflecting plate 10 is positioned at the below of this light source 20, this reflecting plate 10 directly reflects reflection ray, but the conduct direction of this reflection ray will be avoided this light source, so the shape that this reflecting plate is positioned under this light source at this moment can be circular surface or oblong surface or a non-spherical surface or a triangular surface, please consult Fig. 6, Fig. 7 and Fig. 8 simultaneously, it is the opticpath synoptic diagram of the reflector plate of a specific embodiment of the present utility model; As shown in the figure, this reflector plate 10 has hackly surface 12 and slope is all different, when this reflecting plate 10 be during away from this light source this light source in the middle of place 22, this moment, the light intensity of this light source 20 was the most weak, because the hackly surface 12 of reflector plate 10 of the present utility model is maximum in this its angle of design of 22 o'clock in place, centre, a reflection ray 14 that sees through these reflector plate 10 reflections in order to the outgoing light source 13 with this light source 20 makes its reflection upwards, and when being positioned at the below of this light source 20, being designed to of this reflecting plate 10 makes this reflection ray 14 be avoided this light source 20.
Moreover, seeing also Fig. 9, it is the reflector plate of a specific embodiment of the present utility model and the structural representation of brace; As shown in the figure, it is to see through a plate 40 with being connected of this diffuser plate 30 that the utility model further discloses this reflecting plate 10, because for increasing its reflection ray that makes progress 14, to increase its brightness, so the utility model is to have a slope when more disclosing this this reflector plate 10 of brace 40 connections with this diffuser plate 30, this slope θ 3 is an obtuse angle at this moment, to increase reflection ray 14 upwards.
Though the utility model discloses with specific embodiment; but it is not in order to limit the utility model; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present utility model and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that the utility model scope of patent protection is done.
Claims (7)
1. a reflector plate structure that improves the direct type backlight module of reflection uniform luminance is characterized in that, comprising:
One reflector plate, this reflector plate is positioned at the below of a plurality of light sources, and this reflector plate has hackly surface, and the sawtooth angle of this hackly surface is from large to small according to the distance apart from this light source.
2. the reflector plate structure of the direct type backlight module of raising reflection uniform luminance as claimed in claim 1, it is characterized in that, be positioned at this light source under reflector plate hackly surface can make an emergent light come from the time through this hackly surface, a reflection source can be avoided this light source ground and be provided with.
3. the reflector plate structure of the direct type backlight module of raising as claimed in claim 2 reflection uniform luminance is characterized in that, this be positioned at this light source under hackly surface can be a circular surface.
4. the reflector plate structure of the direct type backlight module of the described raising of claim 2 reflection uniform luminance is characterized in that, this be positioned at this light source under hackly surface can be an oblong surface.
5. the reflector plate structure of the direct type backlight module of raising as claimed in claim 2 reflection uniform luminance is characterized in that, this be positioned at this light source under hackly surface can be a non-spherical surface.
6. the reflector plate structure of the direct type backlight module of raising as claimed in claim 2 reflection uniform luminance is characterized in that, this be positioned at this light source under hackly surface can be a triangular surface.
7. the reflector plate structure of the direct type backlight module of raising reflection uniform luminance as claimed in claim 1, it is characterized in that, the dual-side of this reflector plate and this light source comprises a connecting piece, and this brace and this reflector plate have and utilize slope to change the reflection angle at reflection of light angle, an edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118188 CN2752810Y (en) | 2004-11-30 | 2004-11-30 | Reflector structure of straight-down back light module for raising reflective uniform brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118188 CN2752810Y (en) | 2004-11-30 | 2004-11-30 | Reflector structure of straight-down back light module for raising reflective uniform brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2752810Y true CN2752810Y (en) | 2006-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420118188 Expired - Lifetime CN2752810Y (en) | 2004-11-30 | 2004-11-30 | Reflector structure of straight-down back light module for raising reflective uniform brightness |
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| Country | Link |
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| CN (1) | CN2752810Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100560A1 (en) * | 2008-01-31 | 2009-08-20 | Dingguo Pan | A disc-shaped light reflecting plate with variable section unequilateral right triangles prisms and a lamp made therefrom |
| CN103770723A (en) * | 2012-10-19 | 2014-05-07 | 现代摩比斯株式会社 | Decoration device for car |
| CN104006327A (en) * | 2013-02-27 | 2014-08-27 | 纬创资通股份有限公司 | Light-emitting diode backlight module |
| CN104515043A (en) * | 2014-12-31 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN112130376A (en) * | 2020-09-24 | 2020-12-25 | 安徽晟华光学科技有限公司 | Reflection film for improving backlight brightness uniformity of display device |
-
2004
- 2004-11-30 CN CN 200420118188 patent/CN2752810Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100560A1 (en) * | 2008-01-31 | 2009-08-20 | Dingguo Pan | A disc-shaped light reflecting plate with variable section unequilateral right triangles prisms and a lamp made therefrom |
| CN103770723A (en) * | 2012-10-19 | 2014-05-07 | 现代摩比斯株式会社 | Decoration device for car |
| CN103770723B (en) * | 2012-10-19 | 2016-11-16 | 现代摩比斯株式会社 | Decoration device for vehicle |
| CN104006327A (en) * | 2013-02-27 | 2014-08-27 | 纬创资通股份有限公司 | Light-emitting diode backlight module |
| CN104515043A (en) * | 2014-12-31 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| US9983435B2 (en) | 2014-12-31 | 2018-05-29 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN112130376A (en) * | 2020-09-24 | 2020-12-25 | 安徽晟华光学科技有限公司 | Reflection film for improving backlight brightness uniformity of display device |
| CN112130376B (en) * | 2020-09-24 | 2022-07-01 | 安徽晟华光学科技有限公司 | Reflection film for improving backlight brightness uniformity of display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141130 Granted publication date: 20060118 |