CN102681085B - Light guide plate, backlight module and liquid crystal display device - Google Patents
Light guide plate, backlight module and liquid crystal display device Download PDFInfo
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- CN102681085B CN102681085B CN201210139173.2A CN201210139173A CN102681085B CN 102681085 B CN102681085 B CN 102681085B CN 201210139173 A CN201210139173 A CN 201210139173A CN 102681085 B CN102681085 B CN 102681085B
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- guide plate
- light guide
- light
- locating slot
- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 29
- 239000011241 protective layer Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 description 22
- 238000002360 preparation method Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The invention relates to the technical field of a liquid crystal display and provides a light guide plate, a backlight module and a liquid crystal display device. The light guide plate comprises at least one positioning groove arranged at the edge of the light guide plate, wherein a non-transmitting ink layer is arranged on an inner wall of the positioning groove. According to the technical scheme provided by the invention, one part of light irradiated to an area of the positioning groove of the light guide plate by a light source is absorbed by the ink layer arranged at the inner wall of the positioning groove, and the other part of the light is uniformly scattered, so that the intensity and the concentration ratio of light reflection can be reduced. Therefore, no condition that the light in the area of the positioning groove is excessively concentrated exists, and a bright spot phenomenon of the positioning groove is eliminated. According to the technical scheme provided by the invention, only one ink layer is additionally manufactured in the conventional light guide plate, so that no great influences on the structure and the manufacturing process of the conventional light guide plate exist. Therefore, the product properties can be improved without increasing manufacturing time and cost; and the yield is ensured.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of light guide plate, backlight module and liquid crystal display device.
Background technology
Because liquid crystal panel itself can not be luminous, thus existing liquid crystal display device needs light source to provide display light usually.The backlight of early stage liquid crystal display device is generally straight-down negative, namely provides CCFL(cold-cathode fluorescence lamp at liquid crystal panel back, Cold Cathode Fluorescent Lamp) or LED light source, the light that light source sends shines directly on liquid crystal panel.Although straight-down negative more easily realizes, the brightness of backlight and quality also can be guaranteed, but be distributed in liquid crystal panel back due to backlight and must maintain a certain distance, causing the thickness of display device to reduce further, the trend that display device is day by day lightening cannot be caught up with.
Along with improving constantly of back light source brightness, start on the market progressively to adopt side backlight to replace straight-down negative light, to reduce the thickness of liquid crystal display device further.In the embodiment of common side backlight, a light guide plate (LGP is had at the back of liquid crystal panel, Light Guiding Panel), the side of the one or both sides of light guide plate is provided with the light source of CCFL fluorescent tube or the formation of whole piece LED lamp bar, and the light that light source sends forms uniform irradiation through the guiding of light guide plate at liquid crystal panel back.
For side backlight, light guide plate is wherein very important parts, and along with light inlet mode turns to minor face light inlet by long limit light inlet gradually, the speck problem of light guide plate locating slot is also more outstanding.Locating slot is the opening for installing reference column offered at light-guide edge, more coarse and the out-of-shape of partial structurtes due to locating slot, the angle of reflection and transmission is also different, reflection and the transmission of lambert's type can be there is respectively when the light that light source sends is radiated on locating slot, finally cause the local light of the light guide plate near locating slot too concentrated, in display screen, form speck.From its Crack cause, the processing mainly due to locating slot place is careful not, causes the scattered light of light-guide edge discontinuous.The outstanding light in locating slot small area that shows as is concentrated, and forms speck; The scope of locating slot speck is generally in the border circular areas taking locating slot as the center of circle 7 ~ 8mm, and the locating slot also had is due to shape, and speck becomes shot-light shape speck.
Realizing in process of the present invention, inventor finds, although there is the multiple trial improving locating slot speck in prior art, as increase locating slot and edge, visible area distance, without locating slot, rectangle locating slot or carry out polishing etc. to locating slot inside, but these modes have larger impact to existing device structure or manufacture.The distance such as increasing locating slot and edge, visible area can cause non-display area to become greatly, affects the size of device and frivolous property; Light guide plate or panel can be caused to be difficult to fix without locating slot design, during expanded by heating, device architecture is unstable; And rectangle locating slot or polishing etc. is carried out to locating slot inside need to carry out finishing to light guide plate, high to technological requirement, extend equipment preparation time, reduce yields.
Summary of the invention
(1) technical matters that will solve
For above-mentioned shortcoming, the present invention, in order to solve the problem of locating slot speck in prior art, provides a kind of light guide plate, backlight module and liquid crystal display device.
(2) technical scheme
In order to solve the problems of the technologies described above, on the one hand, the invention provides a kind of light guide plate, described light guide plate comprises: at least one is arranged on the locating slot of described light-guide edge, wherein, the inwall of described locating slot is provided with a lighttight ink layer.
On the other hand, the present invention also provides a kind of backlight module simultaneously, and described backlight module comprises light guide plate as above.
Again on the one hand, the present invention also provides a kind of liquid crystal display device simultaneously, and described liquid crystal display device comprises backlight module as above.
(3) beneficial effect
In technical scheme of the present invention, by being arranged on the ink layer on locating slot inwall, the light in a light source directive light guide plate locating slot region part is absorbed, another part is then by homogenous diffusion, reduce reflection ray intensity and concentration degree, thus make the light in locating slot region there will not be the situation of concentrations, eliminate locating slot speck phenomenon.Because technical scheme of the present invention has just prepared one deck ink layer in existing light guide plate more, the structure of existing light guide plate and preparation process are not had much affect, improve properties of product when not increasing preparation time and cost, ensure that yields.
Accompanying drawing explanation
Fig. 1 is the structural representation of light guide plate in one embodiment of the present of invention;
Fig. 2 is the structural representation of an alternative embodiment of the invention light guide plate.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
In an embodiment of the present invention, as shown in Figure 1, light guide plate 1 comprises: at least one is arranged on the locating slot 2 at described light guide plate 1 edge, wherein, the inwall of described locating slot 2 is provided with a light tight ink layer 3.By being arranged on the ink layer on locating slot inwall, the light in a light source directive light guide plate locating slot region part is absorbed, another part is then by homogenous diffusion, reduce reflection ray intensity and concentration degree, thus make the light in locating slot region there will not be the situation of concentrations, eliminate locating slot speck phenomenon.
Further, due to the difference of the shape of locating slot, the form of the speck of generation is also different.Fig. 1,2 embodiment in, locating slot is respectively arc groove or the rectangular recess with chamfering.When the shape of locating slot 2 is the arc of Fig. 1, speck is usually rounded; And when adopting microstructure as shown in Figure 2 to reduce locating slot 2 size, the shape of locating slot 2 is generally the rectangle with chamfering, phase step type change is had at the reflection angle of chamfered area light, speck can be rendered as shot-light shape along extending from locating slot 2 to the direction at light guide plate 1 center, although thus microstructure reduces locating slot size, the light guide plate comparing ordinary construction at the speck at locating slot place expands a lot (usually more than 20%).Pass through the preferred embodiments of the present invention, can process respectively for above-mentioned two kinds of speck situations, adopt the ink layer 3 of different-thickness, further can control light absorptive and the scattering of ink layer, make difform locating slot all can obtain good light absorption and nephelometric turbidity unit, eliminate the circular speck of arc positioning groove and the shot-light shape speck of chamfering rectangle locating slot.
In an embodiment of the present invention, the ink layer of locating slot inwall mainly adopts the mode of spraying to make, and other preparation methods also have the mode such as bat printing or manual inking.Ink can be dispersed on light guide plate detent inwall by the mode of spraying equably, controls the thickness that spray time can control ink layer simultaneously.When ink is sprayed on the PMMA(polymethylmethacrylate of light guide plate, being commonly called as organic glass) after substrate surface, volatile solvent volatilizees gradually, and ink is stayed detent groove surface.
In the preferred embodiment of the present invention, lighttight ink layer is that black or gray ink are formed.Ink, by the Seiko VIC series ink of certain proportioning and Seiko T-926 solvent composition, adjusts different printing oil proportions according to the form of locating slot speck and the order of severity.The ink used in proportioning also can comprise following ink: kingdom IPX series, German Gao Shi, Ma Laibao etc.Different printing oil proportions can affect light absorptive and the scattering of locating slot, and wherein, VIC-710 ink can improve the absorbability of light, reduces the reflectivity of light simultaneously; And VIC-120 ink affects the scattering angle of light, increase the reflectivity of light simultaneously.The integral thickness of ink can affect its light absorptive, but thickness is excessive can affect locating slot shape and locating effect again, and therefore ink layer is generally no more than 12 μm.Further, for circular speck, adopt high-absorbable ink, if printing oil proportion is VIC-710:VIC-120=3:100, the thickness controlling ink layer is about 7 μm; For shot-light shape speck, adopt highly reflective ink, if printing oil proportion is VIC-710:VIC-120=1:100, the thickness controlling ink layer is about 9 μm.
In a preferred embodiment of the invention, after spraying ink, owing to also can install reference column in locating slot, reference column is inevitably formed to contact with locating slot inwall and even can rub.For ensureing the stability of ink layer attachment, avoid ink layer to be made by scratching again to occur speck in light guide plate, the locating slot inwall of light guide plate needs stronger scratch resistance, causes ink layer to come off to prevent the scraping repeatedly of reference column.For this reason, in embodiments of the invention, further can form layer protective layer on the surface of ink layer; Or in ink, increase appropriate rigidizer to form hard ink layer.
Light guide plate in the embodiment of the present invention is mainly used in the backlight module of display device, is particularly useful for side backlight module.Finally, present invention also offers a kind of liquid crystal display device, adopt above-mentioned backlight module to provide light source, described display device can be: any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer.
In sum, in technical scheme of the present invention, by being arranged on the ink layer on locating slot inwall, the light in a light source directive light guide plate locating slot region part is absorbed, another part is then by homogenous diffusion, reduce reflection ray intensity and concentration degree, thus make the light in locating slot region there will not be the situation of concentrations, eliminate locating slot speck phenomenon.Because technical scheme of the present invention has just prepared one deck ink layer in existing light guide plate more, the structure of existing light guide plate and preparation process are not had much affect, improve properties of product when not increasing preparation time and cost, ensure that yields.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and real protection scope of the present invention should be defined by the claims.
Claims (7)
1. a light guide plate, is characterized in that, described light guide plate comprises:
At least one is arranged on the locating slot of described light-guide edge, wherein, the inwall of described locating slot is provided with a lighttight ink layer; Described locating slot is arc groove, and the ink layer of described arc groove adopts high-absorbable ink, and described high-absorbable ink thickness is 7 μm; Or,
Described locating slot is the rectangular recess with chamfering, and the ink layer of the described rectangular recess with chamfering adopts highly reflective ink, and described highly reflective ink thickness is 9 μm.
2. light guide plate according to claim 1, is characterized in that, described lighttight ink layer is formed by black or gray ink.
3. light guide plate according to claim 1, is characterized in that, the surface of described ink layer is provided with layer protective layer.
4. light guide plate according to claim 1, is characterized in that, described ink layer is hard ink layer.
5. a backlight module, is characterized in that, described backlight module comprises the light guide plate according to any one of claim 1-4.
6. backlight module according to claim 5, is characterized in that, described backlight module is side backlight module.
7. a liquid crystal display device, described liquid crystal display device comprises liquid crystal panel, it is characterized in that, described liquid crystal display device also comprises the backlight module as described in claim 5 or 6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093813.4A CN104678483B (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
| CN201210139173.2A CN102681085B (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 |
|---|---|---|---|
| CN201210139173.2A CN102681085B (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510093813.4A Division CN104678483B (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
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| Publication Number | Publication Date |
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| CN102681085A CN102681085A (en) | 2012-09-19 |
| CN102681085B true CN102681085B (en) | 2015-02-04 |
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| CN201210139173.2A Active CN102681085B (en) | 2012-05-07 | 2012-05-07 | Light guide plate, backlight module and liquid crystal display device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678483B (en) * | 2012-05-07 | 2018-08-07 | 青岛海信电器股份有限公司 | Light guide plate, backlight module and liquid crystal display device |
| CN103543558A (en) * | 2013-10-30 | 2014-01-29 | 桂林福冈新材料有限公司 | Method for removing backlight hot spot phenomenon of LED (Light Emitting Diode) |
| CN109027766A (en) * | 2018-04-26 | 2018-12-18 | 江西联创致光科技有限公司 | The full frame special shaped LED backlight of mobile phone |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183194A (en) * | 2006-11-16 | 2008-05-21 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN101876420A (en) * | 2009-04-30 | 2010-11-03 | 骏升科技（扬州）有限公司 | Light guide plate |
| CN202693838U (en) * | 2012-05-07 | 2013-01-23 | 青岛海信电器股份有限公司 | Light guide panel, backlight module and liquid crystal display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2565830B2 (en) * | 1992-12-17 | 1996-12-18 | 日本写真印刷株式会社 | Surface emitting device |
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2012
- 2012-05-07 CN CN201210139173.2A patent/CN102681085B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183194A (en) * | 2006-11-16 | 2008-05-21 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN101876420A (en) * | 2009-04-30 | 2010-11-03 | 骏升科技（扬州）有限公司 | Light guide plate |
| CN202693838U (en) * | 2012-05-07 | 2013-01-23 | 青岛海信电器股份有限公司 | Light guide panel, backlight module and liquid crystal display device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平6-186432A 1994.07.08 * |
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| CN102681085A (en) | 2012-09-19 |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |