CN102721995A - Light guide plate, backlight module and liquid crystal display device - Google Patents
Light guide plate, backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN102721995A CN102721995A CN2012101391658A CN201210139165A CN102721995A CN 102721995 A CN102721995 A CN 102721995A CN 2012101391658 A CN2012101391658 A CN 2012101391658A CN 201210139165 A CN201210139165 A CN 201210139165A CN 102721995 A CN102721995 A CN 102721995A
- Authority
- CN
- China
- Prior art keywords
- lgp
- site
- liquid crystal
- corner
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 28
- 230000002787 reinforcement Effects 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 238000007639 printing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000001447 compensatory effect Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The invention relates to the liquid crystal display technology field and provides a light guide plate, a backlight module and a liquid crystal display device. The light guide plate comprises a ladder-like corner, wherein a network reinforcing area is arranged on the ladder-like corner. According to a technical scheme in the invention, corner area light is further guided by utilizing the ladder-like corner and arranging the network reinforcing area on the corner, thereby emergent ray compensation at the light guide plate corner is carried out to improve light extraction amount on the corner, and a purpose of corner shadow elimination is realized.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of LGP, module backlight and liquid crystal display device.
Background technology
Along with the progress of technology, advantages such as frivolous, energy-conservation because of it, the low radiation of liquid crystal display device become the display device of current main-stream; But because liquid crystal panel itself can not be luminous, it is that panel provides demonstration to use light that liquid crystal display device must have additional light source.In the backlight of liquid crystal display device; Though cold-cathode fluorescence lamp (CCFL; Cold Cathode Fluorescent Lamp) once in occupation of dominant position, but because LED (Light Emitting Diode, light emitting diode) has wide colour gamut, white point is adjustable, advantages such as high dimming ratio and long-life; Recently developed as novel liquid crystal display device backlight, and in some tyrode crystal displays and LCD TV, be applied.The backlight that is used for large scale TFT (Thin Film Transistor, thin film transistor (TFT)) LCD TV has also adopted led light source more and more.
The backlight of early stage liquid crystal display device is generally straight-down negative, promptly at the liquid crystal panel back CCFL or led light source is provided, and the light that light source sends shines directly on the liquid crystal panel.Though straight-down negative is prone to realize; Brightness backlight and quality also can be guaranteed; But because backlight is distributed in the liquid crystal panel back and must keeps certain distance, cause the thickness of display device further to reduce, can't catch up with the lightening day by day trend of display device.
Along with improving constantly of single LEDs brightness, the number of used LED lamp thereby has begun progressively to adopt the side type LED-backlit to replace direct-light type LED backlight fewer and feweri on the market in LCD backlight, with the thickness of further reduction liquid crystal display device.Common side type LED-backlit is on the side of the one or both sides of LGP, to post the light source that whole piece LED lamp bar forms; One LGP (LGP is arranged at the back of liquid crystal panel; Light Guiding Panel), the light that sends of LED lamp bar forms uniform irradiation through the guiding of LGP at the liquid crystal panel back.
But in realizing process of the present invention, the inventor finds that the exiting surface backlight owing to side type is vertical with incidence surface, and light must could form irradiation by counter plate through repeatedly reflecting, and the light path of emergent ray very easily receives the bad influence of multiple device than length; In addition; Because the lighting angle of LED is limited, limited at the luminous energy that edge receives, so side type is backlight is prone to exist flaws such as lamp pearl, lamp shadow, shadow, blanking bar; Especially around the corner shadow is the most serious, has influenced the final display effect of display device.
Summary of the invention
The technical matters that (one) will solve
To above-mentioned shortcoming, the present invention provides a kind of LGP, module backlight and liquid crystal display device in order to solve the turning shadow problem of side type LED-backlit in the prior art.
(2) technical scheme
In order to solve the problems of the technologies described above, on the one hand, the invention provides a kind of LGP, said LGP comprises: stair-stepping turning, wherein, said stair-stepping turning is provided with reinforcement district, site.
On the other hand, the present invention also provides a kind of module backlight simultaneously, and said module backlight comprises aforesaid LGP.
On the one hand, the present invention also provides a kind of liquid crystal display device simultaneously again, and said liquid crystal display device comprises aforesaid module backlight.
(3) beneficial effect
In technical scheme of the present invention; Owing to adopted stepped turning and the reinforcement zone, site that is arranged on the turning; Make the light of corner region obtain further guiding; Thereby the emergent ray to LGP corner compensates, and has improved the amount of light of corner, has realized eliminating the purpose of turning shadow.
Description of drawings
Fig. 1 is the structural representation of LGP in one embodiment of the present of invention;
Fig. 2 is a LGP corner light compensation synoptic diagram in one embodiment of the present of invention;
Fig. 3 is the structural representation of LGP in an alternative embodiment of the invention;
Fig. 4 is the another kind of structural representation of LGP in an alternative embodiment of the invention;
Fig. 5 is another structural representation of LGP in an alternative embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belongs to the scope that the present invention protects.
In an embodiment of the present invention, come further guiding light through the structure and the reinforcement zone, increase site of improving LGP, thereby the emergent ray of LGP corner is compensated, improved the amount of light of corner, realized the purpose of elimination turning shadow.
Particularly, referring to Fig. 1, in an embodiment of the present invention, LGP comprises stair-stepping turning, and said stair-stepping turning is provided with reinforcement district, site.To combine the preferred embodiment in each accompanying drawing to come embodiment of the present invention is done further explanation below.Wherein, Light guide plate mesh point is meant a plurality of scattering points that are formed on the bottom surface of light guide plate; The light that is used for light source is shining into LGP carries out scattering; Make divergence of beam more evenly and make light, thereby liquid crystal panel is formed uniform irradiation according to end face (promptly pressing close to the one side of liquid crystal panel) to LGP.Light guide plate mesh point can be divided into printing-type and non-printing-type by the method for making pattern difference, printing-type be LGP simultaneously with high reflectance and not the ink material of extinction print out the site; Non-printing-type then is to adopt precision die when the LGP moulding, to make on the LGP one side to be formed with densely covered microscopic bumps, utilizes the total reflection phenomenon in the close material of light that light is carried out scattering.Practice shows, the shape of light guide plate mesh point is little to the scattering of light influence, and the rule of arranging of site (like the network point distribution density of diverse location etc.) then affects the uniformity coefficient and the brightness of output light to a great extent.
Embodiment 1
In embodiments of the invention shown in Figure 11; The site of LGP is divided into a plurality of zones; When all lines 1 are depicted as from the top view display screen wherein; The projection line of the inward flange of display device fore shell on LGP, the zone that interior all lines 1 are surrounded is commonly referred to the viewing area of display device; Periphery lines 2 are depicted as the edge line of the blooming piece that the glue edge that shows module internal pressed, and institute's region is commonly referred to the outer peripheral areas of viewing area between interior all lines 1 and the periphery lines 2; Zone outside the periphery lines 2 is commonly referred to non-viewing area.LED 3 through being arranged on the LGP side provides light source.
Mainly the network point distribution of non-viewing area is improved in the embodiments of the invention, got final product by existing mode design site in the outer peripheral areas of viewing area and viewing area.As shown in Figure 1, the turning of LGP is set to stepped (right angle sawtooth) in the embodiments of the invention 1, is provided with reinforcement district, triangle site 4 in this stair-stepping corner.Wherein said triangle site is meant and on the ladders at different levels at turning, is paved with reflection with printing ink (being generally milky), because ladder originally as the right angle sawtooth, forms right-angle triangle naturally after every grade of ladder all is paved with; In addition; The site is the general designation to the light scatter/reflector space on the LGP; Reinforcement district, triangle site 4 in the embodiment of the invention 1 is complete scattering/reflector spaces; And equally be the point-like of disperseing unlike the site in the viewing area, need not consider dot density and diameter that this is regional during design, just should the zone in the preparation light guide plate mesh point all cover and get final product with printing ink.
In LGP, the shape in shadow zone is normally radially distributed to the center by the LGP bight, and promptly the bight of LGP is the darkest, from the bight to center gradual change blast successively; If rectangle is made in the reinforcement district, site at LGP turning; Though can carry out luminance compensation to the shadow zone equally; But because the compensation effect in reinforcement district, rectangle site is to begin to spread to the center from rectangular edges; Do not conform to the shape in shadow district, it is unusual to cause some areas (like rectangle top reflected light irradiation area) brightness to be occurred by overcompensation.Therefore, the LGP turning is set to steppedly in the embodiments of the invention, and reinforcement district, site is set on stair-stepping turning.The compensation effect in the reinforcement district, triangle site of embodiment 1 is as shown in Figure 2; The propagation trend of reflected light 5 is to spread to the center from corner, and is basic parallel with the triangle hypotenuse in site reinforcement district 4, thereby when luminance compensation is carried out in the shadow zone; The shape of its compensatory zone just in time conforms to shadow areal distribution situation; Make the shadow zone obtain appropriate compensation, display brightness is even, has not only eliminated the turning shadow but also be unlikely to brightness to occur unusual.
Further referring to Fig. 3; In the embodiments of the invention 1; The leg-of-mutton height in reinforcement district, site can be confirmed according to the height in shadow zone 6; The true form in shadow zone 6 should be from the bight to the center diffusion disperse shape (such as the triangle or the sector region that with the bight are the summit), but represent the height that this is regional for image, depict shadow zone 6 as rectangle among Fig. 3.The scope in shadow zone 6 can be confirmed through observation or software emulation; In embodiments of the invention 1; The P position, summit, the top in reinforcement district, site should be not less than the height of shadow zone 6 peaks, and leg-of-mutton bottom base, site reinforcement district should be lower than the height (promptly being lower than the height of peripheral contour 2 among Fig. 1) of the outer peripheral areas of viewing area.Through this set mode, the light that light source 3 sends is made the light of compensation can evenly cover the shadow zone by further guiding.
Through after the design in reinforcement district, above-mentioned site, the printing ink that the light that light source 3 sends can be laid when arriving reinforcement district, site carries out scattering and reflection, makes light arrive shadow zone 6.Because the light in shadow district is equivalent to be applied a part of scattering and reflected light, the brightness meeting is improved.And reinforcement district in site is set to greater than shadow zone, is in order better more light to be delivered to this zone, otherwise maybe reinforcing effect not enough.
This area person skilled will be understood that; Fig. 1-3 only is a kind of example of network point distribution; The concrete situation that is provided with can be adjusted according to the actual conditions (can change because of the variation of light conducting plate structure, lamp bar position etc.) in LGP design requirement and shadow zone, thereby the distribution situation among Fig. 1-3 should not regarded limitation of the present invention as.
Embodiment 2
In the embodiments of the invention, can also adjust the shape in site reinforcement district according to the light demand that reflects.Like Fig. 4 and shown in Figure 5; In an alternative embodiment of the invention; The turning of LGP is set to equally stepped (right angle sawtooth), is provided with reinforcement district, site 4 in this stair-stepping corner, but in this embodiment 2; Reinforcement district, said site 4 is circle (Fig. 4) or fan-shaped (Fig. 5) zones that on ladders at different levels, formed by printing ink (being generally milky), and said printing ink has higher light reflectivity.
Fig. 4 and Fig. 5 have further showed the direction of propagation of reflection ray among this embodiment; Can find out; In the embodiments of the invention 2; The propagation trend of reflected light 5 is to spread to the center from corner equally, but it is basic parallel with the border arc in reinforcement district, said site 4, and the reinforcement district, site 4 on the multistage ladder can form a plurality of arc compensatory zones.
Can find out; Through the mode among the embodiment 2 of Fig. 4 or Fig. 5, the present invention can compensate the specific region at turning, if the radian of adjustment reinforcement district, site border arc and towards; Reflection ray is propagated to specific direction, the shadow zone on this direction is compensated.Therefore, when having tangible shadow, can carry out the emphasis compensation to these specific regions through the mode of the embodiment of the invention 2 when the out-of-shape of turning shadow or in a certain zone.
Further; The dual mode of the embodiment of the invention 1,2 can also combine; Such as; The ladder at LGP turning can adopt the reinforcement district, leg-of-mutton site shown in embodiment 1 evenly to compensate for most zones, and adopt the circular or fan-shaped reinforcement district, site shown in embodiment 2 to carry out the emphasis compensation to some specific region more than 2 grades.This mode makes embodiments of the invention can adapt to the various defective of LGP, and it is more even to obtain brightness, the better equipment of display effect.
LGP in the above embodiment of the present invention is mainly used in the module backlight of liquid crystal display device; Particularly; This module backlight is the side entrance back module; Be that light source is arranged at least one side of above-mentioned LGP, the light that light source sends forms uniform exiting surface after through the guiding of above-mentioned LGP.Wherein, said light source can be CCFL or LED.
At last; The present invention also provides a kind of liquid crystal display device; It adopts above-mentioned module backlight that light source is provided, said display device can for: liquid crystal panel, Electronic Paper, oled panel, LCD TV, LCD, DPF, mobile phone, panel computer etc. have the product or the parts of any Presentation Function.
In sum; In the technical scheme of the present invention; Owing to adopted stepped turning and the reinforcement zone, site that is arranged on the turning, made the light of corner region obtain further guiding, thereby the emergent ray of LGP corner is compensated; Improve the amount of light of corner, realized eliminating the purpose of turning shadow.
Above embodiment only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and real protection scope of the present invention should be defined by the claims.
Claims (10)
1. a LGP is characterized in that, said LGP comprises:
Stair-stepping turning, wherein, said stair-stepping turning is provided with reinforcement district, site.
2. LGP according to claim 1 is characterized in that, the site of said LGP is divided into the outer peripheral areas and the non-viewing area of viewing area, viewing area, and reinforcement district, said site is arranged in the said non-viewing area.
3. LGP according to claim 1 is characterized in that, reinforcement district, said site is arranged on the light scatter/reflector space on the ladders at different levels at said stair-stepping turning.
4. LGP according to claim 1 is characterized in that, reinforcement district, said site is circular, fan-shaped and/or triangle.
5. LGP according to claim 2 is characterized in that, the top vertex position in reinforcement district, said site is not less than the height of shadow zone peak in the LGP, and reinforcement district, said site lowest positions is lower than the height of the outer peripheral areas of viewing area.
6. LGP according to claim 1 is characterized in that, reinforcement district, said site is formed by the ink material with high reflectance.
7. a module backlight is characterized in that, said module backlight comprises like each described LGP among the claim 1-6.
8. module backlight according to claim 7 is characterized in that, the light source of said module backlight is arranged at least one side of said LGP.
9. module backlight according to claim 8 is characterized in that, said light source is CCFL or LED.
10. liquid crystal display device, said liquid crystal display device comprises like each described module backlight among the claim 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101391658A CN102721995A (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101391658A CN102721995A (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102721995A true CN102721995A (en) | 2012-10-10 |
Family
ID=46947809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101391658A Pending CN102721995A (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721995A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065069A1 (en) * | 2021-10-18 | 2023-04-27 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
| TWI831428B (en) * | 2021-10-22 | 2024-02-01 | 日商日本顯示器股份有限公司 | Lighting devices and display devices |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040130883A1 (en) * | 2002-12-17 | 2004-07-08 | Charles Leu | Surface light source and light guide plate having differently configured dots |
| US20040160549A1 (en) * | 2003-02-18 | 2004-08-19 | Jae Woo Park | Liquid crystal display module |
| CN1523426A (en) * | 2003-02-20 | 2004-08-25 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| JP2004265646A (en) * | 2003-02-28 | 2004-09-24 | Sony Corp | Backlight for optical element |
| JP2005243601A (en) * | 2004-02-24 | 2005-09-08 | Forward Electronics Co Ltd | Light guide plate |
| CN101706627A (en) * | 2009-11-13 | 2010-05-12 | 深圳创维－Rgb电子有限公司 | Liquid crystal display (LCD) with uniform brightness and method for removing LCD dark spaces |
| US20100271568A1 (en) * | 2009-04-27 | 2010-10-28 | Samsung Electronics Co., Ltd. | Backlight assembly and liquid crystal display |
-
2012
- 2012-05-07 CN CN2012101391658A patent/CN102721995A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040130883A1 (en) * | 2002-12-17 | 2004-07-08 | Charles Leu | Surface light source and light guide plate having differently configured dots |
| US20040160549A1 (en) * | 2003-02-18 | 2004-08-19 | Jae Woo Park | Liquid crystal display module |
| CN1523426A (en) * | 2003-02-20 | 2004-08-25 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| JP2004265646A (en) * | 2003-02-28 | 2004-09-24 | Sony Corp | Backlight for optical element |
| JP2005243601A (en) * | 2004-02-24 | 2005-09-08 | Forward Electronics Co Ltd | Light guide plate |
| US20100271568A1 (en) * | 2009-04-27 | 2010-10-28 | Samsung Electronics Co., Ltd. | Backlight assembly and liquid crystal display |
| CN101706627A (en) * | 2009-11-13 | 2010-05-12 | 深圳创维－Rgb电子有限公司 | Liquid crystal display (LCD) with uniform brightness and method for removing LCD dark spaces |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065069A1 (en) * | 2021-10-18 | 2023-04-27 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
| TWI831428B (en) * | 2021-10-22 | 2024-02-01 | 日商日本顯示器股份有限公司 | Lighting devices and display devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108572481B (en) | Backlight module and display device | |
| EP2166275B1 (en) | Illuminating device and liquid crystal display | |
| US7651241B2 (en) | Direct type backlight unit and method for forming diffuser in the direct type backlight unit | |
| CN101858566B (en) | Light source reflector used in backlight component and backlight component thereof | |
| CN102620193A (en) | Sectional light emitting diode (LED) backlight module and liquid crystal display device | |
| CN107703678A (en) | A kind of down straight aphototropism mode set and display device | |
| JP2008542994A (en) | Backlight assembly and display device having the same | |
| KR20130061796A (en) | Optical assembly, backlight unit and display device using the same | |
| US20070110386A1 (en) | Device having combined diffusing, collimating, and color mixing light control function | |
| CN101893190B (en) | Local dimming backlight module and liquid crystal display applying same | |
| JP2007003852A (en) | Diffusion sheet, diffusion sheet manufacturing method, backlight device, and liquid crystal display device | |
| US7125141B2 (en) | Apparatus for homogeneously distributing lights | |
| JP2012174370A (en) | Lighting apparatus, and liquid crystal display | |
| KR20180062573A (en) | Direct light type backlight unit and display device having the same | |
| US10914982B2 (en) | Backlight module and display device | |
| US9759852B2 (en) | Lightguide design techniques | |
| US20100214514A1 (en) | Optical diffusion device | |
| CN102721995A (en) | Light guide plate, backlight module and liquid crystal display device | |
| CN114137764A (en) | Backlight module and display device | |
| CN201803318U (en) | Light guide plate, back light module, and display device employing back light module | |
| CN209674027U (en) | Reflector plate and backlight module | |
| KR101070514B1 (en) | Direct type back light assembly | |
| CN202158495U (en) | Moire-interference-reducing optical sheet, backlight module and liquid crystal display device | |
| CN201531825U (en) | Combined light guiding board | |
| CN100452459C (en) | Luminescent light source and luminescent light source array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121010 |