CN102287689B - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
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- CN102287689B CN102287689B CN2011102045361A CN201110204536A CN102287689B CN 102287689 B CN102287689 B CN 102287689B CN 2011102045361 A CN2011102045361 A CN 2011102045361A CN 201110204536 A CN201110204536 A CN 201110204536A CN 102287689 B CN102287689 B CN 102287689B
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- light
- backlight module
- light trough
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- line source
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- 239000000463 material Substances 0.000 claims description 18
- 238000001579 optical reflectometry Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
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- 238000013461 design Methods 0.000 abstract description 9
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- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
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- 230000008901 benefit Effects 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 238000004020 luminiscence type Methods 0.000 description 3
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Abstract
The invention discloses a backlight module, which comprises a plurality of linear light sources, at least two lamp slots, a lower reflecting plate, an upper reflecting plate and a module framework. The lamp slots are arc-shaped, the linear light sources are respectively arranged in the lamp slots, adjacent lamp slots are arranged back to back, the openings of the lamp slots on the edges are arranged inwards, and a light transmission plate has certain light transmittance and light reflectance; the lower reflecting plate is arranged under the lamp slots and is used for selectively reflecting light; the upper reflecting plate is arranged above the lamp slots and is used for selectively transmitting light; and the module framework is used for accommodating the linear light sources, the lamp slots, the lower reflecting plate and the upper reflecting plate. The light and thin novel framework type backlight module design is adopted in the backlight module, and the backlight module can be applied in large-sized flat panel displays.
Description
Technical field
The present invention relates to the liquid crystal display of a kind of backlight module and this backlight module of employing.
Background technology
Existing flat-panel screens adopts the TFT-LCD display technique more, and TFT-LCD is the inactive mode luminescence display, must provide uniform system brightness to arrange in pairs or groups with it by stable backlight source module (Backlight Module), could obtain outstanding display effect.Backlight source module by luminescence component arrange, the collocation of optics section material and internal mechanism design, the uniform planar light source of output intensity.Mainly be divided into two kinds of direct-light-type backlight module and side backlight modules according to the arrangement mode of luminescence component, schematic diagram is as follows: Fig. 1 is side backlight source module framework; Fig. 2 is direct-light-type backlight module framework.
Tradition side backlight module need to carry out leaded light and mixed light by light guide plate opposite side light source, and there is following problem in the light guide plate application: 1. the light guide plate application cost is in a high position; 2. in the large scale flat panel display, the light guide plate quality is large, does not meet light-weighted designer trends; 3. large-size light-conducting plate current collector internal environmental factor impact, there will be the problems such as yellow or distortion.
The tradition down straight aphototropism mode set needs certain mixed light space to make the bottom light source mixed light, and therefore, down straight aphototropism mode set has difficulties in the slimming design.In addition, if adopt the light source of LED as down straight aphototropism mode set, need a greater number in, low-power LED, this does not meet efficient, energy-conservation display application trend.
Summary of the invention
, for overcoming the low problem of prior art backlight module utilization factor, the invention provides the high backlight module of a kind of light utilization efficiency.Technical scheme is: a kind of backlight module, it is characterized in that, and comprising:
A plurality of line sources,
At least two light troughs, this light trough are an arcuation, and described line source is located at respectively the light trough inboard, and adjacent light trough arranges dorsad, and the light trough opening at edge arranges inwardly, and this light-passing board has certain transmittance and light reflectivity;
Reflector plate once, be located at the below of light trough, in order to light is carried out selective reflecting;
Transmission sheet on one, be located at the top of light trough, in order to light is carried out selective transmission;
One module framework, in order to hold above-mentioned line source, light trough, lower reflector plate and upper transmission sheet.
Better, described light trough is made by plastic material, this light trough opening angle capable of regulating.
Better, described light trough material comprises PMMA, PC, PS, PET or other macromolecular material.
Better, described line source comprises fluorescent tube or LED lamp bar or LED Lightbar.
Better, the scope of described light trough transmittance is 5 ~ 95%, the scope of light reflectivity is 5 ~ 95%.
Better, described light trough opening angle is capable of regulating in 0-180 ° of scope.
Better, adjacent light trough is one-body molded by extruding or Shooting Technique.
Better, the optical reflectivity of described lower reflector plate〉80%.
Better, the optical transmittance of upper transmission sheet is 15 ~ 95%, optical reflectivity is 15 ~ 95%.
For overcoming the low problem of prior art liquid crystal display light utilization efficiency, the present invention also provides a kind of light utilization efficiency high liquid crystal display.Concrete scheme is: a kind of liquid crystal display, and it comprises the backlight module of a display panels and a setting stacked with it, this backlight module adopts above-mentioned backlight module.
The advantage of the comprehensive side type of the present invention and down straight aphototropism mode set, innovation proposes the concept of frame-type backlight module, light mixing effect is better than existing two kinds of modular structures, realization has the Novel frame-type backlight source module design of lightweight and slimming concurrently, and this backlight module can be applicable to can improve light utilization efficiency on the large scale flat-panel screens.
Description of drawings
Figure 1A is the side backlight source module Organization Chart of prior art;
Figure 1B is the direct-light-type backlight module Organization Chart of prior art;
Fig. 2 is line source structural drawing of the present invention;
Fig. 3 A is light trough structural drawing of the present invention;
Fig. 3 B is that the adjacent light trough of the present invention is in conjunction with schematic diagram;
Fig. 4 is light trough of the present invention and line source unitized construction schematic diagram;
Fig. 5 is backlight module mixed light of the present invention chamber schematic diagram;
Fig. 6 is back light module unit structure exploded view of the present invention;
Fig. 7 is backlight module constitutional diagram of the present invention.
Embodiment
, for making purpose of the present invention, technical scheme and advantage clearer, below will by specific embodiment and relevant drawings, the present invention be described in further detail.
The invention provides a kind of backlight module, comprising: a plurality of line sources, at least two light troughs, this light trough is an arcuation, and described line source is located at respectively the light trough inboard, and adjacent light trough arranges dorsad, the light trough opening at edge arranges inwardly, and this light-passing board has certain transmittance and light reflectivity; Reflector plate once, be located at the below of light trough, in order to light is carried out selective reflecting; Transmission sheet on one, be located at the top of light trough, in order to light is carried out selective transmission; One module framework, in order to hold above-mentioned line source, light trough, lower reflector plate and upper transmission sheet.Described light trough is made by plastic material, this light trough opening angle capable of regulating.Wherein, described light trough material comprises PMMA, PC, PS, PET or other macromolecular material; Described line source comprises fluorescent tube or LED lamp bar; The scope of described light trough transmittance is 5 ~ 95%, and the scope of light reflectivity is 5 ~ 95%; Described light trough opening angle is capable of regulating in 0-180 ° of scope; Adjacent light trough is one-body molded by extruding or Shooting Technique; The optical reflectivity of described lower reflector plate〉80%; The optical transmittance of upper transmission sheet is 15 ~ 95%, and optical reflectivity is 15 ~ 95%.
Please refer to Fig. 2.Figure 2 shows that the line source structural drawing.Line source can be the fluorescent tube form, as CCFL cold-cathode lamp etc.; Line source can also be the LED lamp strips of LED and light-strip combination, comprises single LED lamp bar and two LED lamp bar; Line source can also be LED Lightbar form or based on other form of LED Lightbar form, as LED Lightbar fluorescent tube (LED Lightbar is placed in fluorescent tube) etc., line source can also be other light source with the linear forms bright dipping, is not limited to this.
Please refer to Fig. 3 A and Fig. 3 B, light trough must have certain transmittance, and the scope of transmittance is 5 ~ 95%; Light trough also has certain light reflectivity, and the scope of light reflectivity is 5 ~ 95%.The material of light trough can be PMMA, PC, PS, PET or other macromolecular material, adjusts transmittance and the reflecting rate of light trough by formula Design; The manufacture of light trough can be extrusion moulding, injection mo(u)lding or other polymer shaping mode, the opening angle of light trough is 0 ~ 180 °, A/F is the light trough distance between edge up and down greater than 0mm(light trough A/F, its scope depends on the area in mixed light district, mixed light district area is larger in theory, and the A/F of required light trough is larger; The application requirements of display device, little of mobile phone, arrive greatly outdoor advertisement screen, related mixed light district area is different, therefore, the A/F scope of light trough is〉0mm).
In the present embodiment, its exterior bottom is plane, be beneficial between light trough or light trough and other assembly between bonding combination.Based on this light trough structure, light trough array configuration as shown in Figure 3 B can be arranged, the combination dorsad of two light troughs, this unitized construction can by extrude or Shooting Technique one-body molded, or connecting combination by bonding or other fixed form between light trough, light trough and light trough combination all have the mechanism supports function.The above light trough structure example that only presents a demonstration, all designs of light trough based on above function are all protected.
Please refer to Fig. 4, for line source is placed along light trough is inboard.
Please refer to Fig. 5, be backlight module mixed light of the present invention chamber schematic diagram.With the special light trough of line source mechanism collocation, form the mixed light chamber with upper and lower two special optical diaphragms, realize that line source is converted into area source, and light trough that can be special design is divided into a plurality of mixed light cavity region with the large scale backlight module, realizes the design of Novel frame-type backlight module.
Please refer to Fig. 6, be back light module unit structure exploded view of the present invention.This backlight module is combined by line source, light trough, lower reflector plate, upper transmittance plate and module housing.Wherein, lower reflector plate can be that silver-colored reflector plate, white reflection sheet or other have film, sheet material or the sheet material of high optical reflectivity; The optical reflectivity of lower reflector plate〉80%, the function of lower reflector plate is to form the mixed light chamber with line source, light trough and upper transmittance plate, light is reflected the auxiliary function that realizes mixed light and leaded light; Upper transmission sheet is light to be had the polarisation selectivity penetrate and the film that reflects, sheet material or sheet material, the optical transmittance of upper transmission sheet is 15 ~ 95%, optical reflectivity is 15 ~ 95%, the function of upper transmission sheet is to form the mixed light chamber with line source, light trough and lower reflector plate, light is carried out selectivity penetrate and reflect, the auxiliary function that realizes mixed light and leaded light.Combination step is: (1) first is combined into line source mechanism with line source and light trough; (2) reflector plate under the placement of module framework bottom, this time reflector plate can be the optics section material of silver-colored reflector plate, white reflection sheet or other high optical reflectivity; (3) by bonding or other fixed form, line source mechanism is arranged and is positioned on lower reflector plate, as frame supported mechanism, backlight module is divided into the mixed light zone that area equates or do not wait; (4) upper transmittance plate is placed in line source mechanism top, forms frame-type backlight module basic structure; (5), by configure the optics section materials such as diffusion sheet, increment sheet above frame-type backlight module basic structure, form complete Novel frame-type backlight module.
Wherein, the optical principle in mixed light district: the output light angle of regulating line source by the light trough opening angle, make light source after being input to the mixed light chamber, carry out reflection repeatedly and penetrate between lower reflector plate and upper transmittance plate, thereby make line source can complete the long-range conduction of light in specific range, form uniform planar light source.The support concept of line source mechanism: with the module housing, by bonding or other physical method, light trough and light trough combination are fixed on lower reflector plate, the framework that forms thus can play to the placement of upper transmittance plate and other optics section material the effect of physical support, by it in large size back light module application, the physical deformation that can avoid the large scale blooming piece to produce due to gravity factor, the optical stability of lifting backlight module.
The mixed light principle of line source mechanism: line source mechanism is in the intersection in mixed light district, mixed light between the mixed light district is played the effect of harmony, therefore light trough must have certain reflectivity and transmittance, and requires reflectivity values relatively high, and transmittance numerical value is relatively low.Higher reflectivity can make most line source light along the bright dipping of light trough opening direction and inject in the mixed light chamber, improves the light source utilization factor.Light trough and light source distance are nearest, the light intensity that is subject to is maximum, therefore only the mean flow rate that need guarantee the light intensity that sees through from the light trough top and mixed light district planar light source quite or approach, can reach harmony mixed light district mixed light, promotes the purpose of backlight module planar light source integral body light mixing effect.The adjusting of simulating by experiment and fill a prescription, can obtain the rational reflectivity of light trough and transmittance parameter.
The present invention also provides a kind of liquid crystal display, and it comprises the backlight module of a display panels and a setting stacked with it, and this backlight module adopts top described back light module unit structure, can improve light utilization efficiency.
The advantage of the comprehensive side type of the present invention and down straight aphototropism mode set, innovation proposes the concept of frame-type backlight module, light mixing effect is better than existing two kinds of modular structures, realization has the Novel frame-type backlight source module design of lightweight and slimming concurrently, and this backlight module can be applicable to can improve light utilization efficiency on the large scale flat-panel screens.
Above-listed preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a backlight module, is characterized in that, comprising:
A plurality of line sources,
At least two light troughs, this light trough is an arcuation, described line source is located at respectively the light trough inboard, wherein two light troughs are in the module framework edge and opening arranges inwardly, all the other light troughs are in module framework and adjacent light trough arranges dorsad, and this light trough has certain transmittance and light reflectivity, and light trough opening angle capable of regulating in 0-180 ° of scope;
Reflector plate once, be located at the below of light trough, in order to light is carried out selective reflecting;
Transmission sheet on one, be located at the top of light trough, in order to light is carried out selective transmission;
One module framework, in order to hold above-mentioned line source, light trough, lower reflector plate and upper transmission sheet.
2. backlight module according to claim 1, is characterized in that, described light trough is made by plastic material, this light trough opening angle capable of regulating.
3. backlight module according to claim 1, is characterized in that, described light trough material comprises PMMA, PC, PS, PET.
4. backlight module according to claim 1, is characterized in that, described line source comprises fluorescent tube or LED lamp bar or LED lamp string.
5. backlight module according to claim 1, is characterized in that, the scope of described light trough transmittance is 5 ~ 95%, and the scope of light reflectivity is 5 ~ 95%.
6. backlight module according to claim 1, is characterized in that, adjacent light trough is one-body molded by extruding or Shooting Technique.
7. backlight module according to claim 1, is characterized in that, the optical reflectivity of described lower reflector plate is greater than 80%.
8. liquid crystal display, it comprises the backlight module of a display panels and a setting stacked with it, this backlight module is as the described backlight module of claim 1-7 any one.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102045361A CN102287689B (en) | 2011-07-21 | 2011-07-21 | Backlight module and liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102045361A CN102287689B (en) | 2011-07-21 | 2011-07-21 | Backlight module and liquid crystal display |
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| CN102287689A CN102287689A (en) | 2011-12-21 |
| CN102287689B true CN102287689B (en) | 2013-11-20 |
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| CN2011102045361A Expired - Fee Related CN102287689B (en) | 2011-07-21 | 2011-07-21 | Backlight module and liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103047583A (en) * | 2012-12-07 | 2013-04-17 | 康佳集团股份有限公司 | Side light direct type backlight module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159601A (en) * | 1994-12-16 | 1997-09-17 | 佳能株式会社 | Illumination device LCD equipment containing same |
| CN1696791A (en) * | 2005-06-22 | 2005-11-16 | 友达光电股份有限公司 | Straight light type structure of backlight unit |
| CN2837892Y (en) * | 2005-12-12 | 2006-11-15 | 陕西科技大学 | Easy-to-replace LCD backlight source structure |
| TWM343817U (en) * | 2008-02-15 | 2008-11-01 | Kismart Corp | Diffusion plate and light guide plate structure using laser engraving |
| CN201191339Y (en) * | 2008-04-17 | 2009-02-04 | 广东雪莱特光电科技股份有限公司 | Planar backlight source module |
| CN202188393U (en) * | 2011-07-21 | 2012-04-11 | 冠捷显示科技（厦门）有限公司 | Backlight module |
-
2011
- 2011-07-21 CN CN2011102045361A patent/CN102287689B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159601A (en) * | 1994-12-16 | 1997-09-17 | 佳能株式会社 | Illumination device LCD equipment containing same |
| CN1696791A (en) * | 2005-06-22 | 2005-11-16 | 友达光电股份有限公司 | Straight light type structure of backlight unit |
| CN2837892Y (en) * | 2005-12-12 | 2006-11-15 | 陕西科技大学 | Easy-to-replace LCD backlight source structure |
| TWM343817U (en) * | 2008-02-15 | 2008-11-01 | Kismart Corp | Diffusion plate and light guide plate structure using laser engraving |
| CN201191339Y (en) * | 2008-04-17 | 2009-02-04 | 广东雪莱特光电科技股份有限公司 | Planar backlight source module |
| CN202188393U (en) * | 2011-07-21 | 2012-04-11 | 冠捷显示科技（厦门）有限公司 | Backlight module |
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| CN102287689A (en) | 2011-12-21 |
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Owner name: TPV TECHNOLOGY (QINGDAO) CO., LTD. Free format text: FORMER OWNER: GUANJIE DISPLAY TECHNOLOGY (XIAMEN) CO., LTD. Effective date: 20150506 |
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Effective date of registration: 20150506 Address after: 266109 entrepreneurship center of hi tech Industrial Development Zone, Shandong, Qingdao 324-33 Patentee after: AOC Technology (Qingdao) Co., Ltd. Address before: 361111 No. 1 Xiang Hai Road, Torch Industrial Zone (Xiangan), Fujian, Xiamen Patentee before: TPV Display Technology (Xiamen) Co., Ltd. |
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