CN1553226A - Light negative mould set and light conducting board thereof - Google Patents
Light negative mould set and light conducting board thereof Download PDFInfo
- Publication number
- CN1553226A CN1553226A CNA031268188A CN03126818A CN1553226A CN 1553226 A CN1553226 A CN 1553226A CN A031268188 A CNA031268188 A CN A031268188A CN 03126818 A CN03126818 A CN 03126818A CN 1553226 A CN1553226 A CN 1553226A
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- China
- Prior art keywords
- guide plate
- light guide
- light
- dielectric layer
- groove structure
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Abstract
A light guiding plate consists of a body, a media layer on the body and refractivity of the media layer is lower than refractivity of the body as a light outgoing face having multiple concave groove is set on the media layer. A back hight module consists of a light guiding plate and at least one light source set one side of the light guiding plate.
Description
[technical field]
The present invention relates to module backlight and light guide plate thereof that a kind of LCD is used.
[background technology]
LCD be a kind of can not self-emission display apparatus, it is passing through or the obstructed realization demonstration of coming by control light beam that external light source sends mainly, therefore need corresponding backlight or preceding optical mode group, this backlight or preceding optical mode group is that the beam direction display panel that external light source is sent is realized Presentation Function.
See also Fig. 1, the module backlight of prior art mainly comprises a light source 5, a light source cover 6, a light guide plate 3, a reflecting plate 4, a diffuser plate 2 and two light-collecting pieces 1.Wherein, this light source 5 is line sources, mainly contain electroluminescent lamp (Electroluminiscent Lamp, EL) and cold cathode fluorescent lamp (Cold Cathode Fluorescence Lamp, CCFL) two kinds, it is arranged on this light guide plate 3 one sides, the cooperation by this light source cover 6 with light transmission in this light guide plate 3.The effect of this light guide plate 3 be the light that sends of guiding light source 5 from exiting surface 7 outgoing, improve display panel (figure does not show) luminosity and homogeneity simultaneously.This reflecting plate 4 is arranged on a side of the bottom surface 8 of this light guide plate 3, is used for the light from bottom surface 8 outgoing of light guide plate 3 is reflected in this light guide plate 3 once more, improves the utilization factor of light.Two bottom surfaces of this diffuser plate 2 are provided with tiny glass beads structure (figure do not show), and its effect is will to incide the light scatter in the diffuser plate 2 and softization of pattern that make display panel.This light-collecting piece 1 is also referred to as prism plate, and its effect is light to be produced converge effect, is used for improving the emitting brightness of module backlight, reduces power consumption.But this module backlight adopts two light-collecting pieces 1, makes that entire aphototropism mould complex structure and structure dress is inconvenient, and cost increases.
Seeing also Fig. 2, is a kind of light guide plate that the Chinese patent of May 23 calendar year 2001 bulletin is disclosed for No. 00246505, and this light guide plate 10 comprises a body 12, a diffusion barrier 13, a plasma film 14 and a reflectance coating 11.The cross section of this body 12 roughly is wedge shape, and its exiting surface 18 comprises a plurality of fine and homogeneous V-shaped groove structures 16; This diffusion barrier 13 and this plasma film 14 are attached to the surface of V-shaped groove structure 16 successively; The bottom surface 15 of body 12 has the site 17 that a plurality of array-likes distribute.
This light guide plate 10 comprises a plurality of V-shaped groove structures 16, be used for reaching the light harvesting effect identical with light-collecting piece, utilize the module backlight of this light guide plate 10, can save the cost of light-collecting piece, still, because V-shaped groove structure 16 is formed on the body 12 of light guide plate 10, V-shaped groove structure 16 is in light harvesting, can influence the light-emitting uniformity of light guide plate 10, thereby reduce outgoing light homogeneity, even form blanking bar.In order to eliminate V-shaped groove structure 16 formed blanking bars, industry changes the shape and the pitch of V-shaped groove structure 16 usually, and still, these modes all can only slacken and can't eliminate the generation of blanking bar fully, and increases the complexity in the design.
[summary of the invention]
The shortcoming inhomogeneous for the bright dipping that overcomes the prior art light guide plate and design is complicated the invention provides a kind of bright dipping evenly and the light guide plate of simplicity of design.
The shortcoming inhomogeneous for the bright dipping that overcomes prior art module backlight and design is complicated the invention provides a kind of bright dipping evenly and the module backlight of simplicity of design.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of light guide plate is provided, it comprises a body, wherein this light guide plate comprises that also one is arranged on the dielectric layer on this body, the refractive index of this dielectric layer is less than the refractive index of this body, this dielectric layer also comprises an exiting surface, and this exiting surface has a plurality of groove structures.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of module backlight is provided, it comprises a light guide plate and at least one light source that is arranged on this light guide plate one side, this light guide plate comprises a body, wherein this light guide plate comprises that also one is arranged on the dielectric layer on this body, the refractive index of this dielectric layer is less than the refractive index of this body, this dielectric layer also comprises an exiting surface, and this exiting surface has a plurality of groove structures.
Compared with prior art, the invention has the beneficial effects as follows: light guide plate of the present invention and module backlight are provided with dielectric layer on the body of light guide plate, make groove structure and body to isolate, promptly the interface condition at groove structure place becomes dielectric layer-air from body-air.According to the refractive index law:
sinα/sinβ＝nβ/nα
Wherein α, β are respectively incident angle, refraction angle, and n α, n β are respectively the refractive indexes of the plane of incidence, plane of refraction material.Because the refractive index of dielectric layer is less than the refractive index of body, when therefore light is from the groove structure outgoing, refraction angle when the refraction angle when interface is a dielectric layer-air is a body-air than interface is little, the effect that equivalence confinement groove light that structure causes narrows down, and this groove structure also plays the light harvesting effect.In addition, in the time of light guide plate of the present invention and design of backlight module, only need to consider the refractive index size of dielectric layer, do not need to avoid blanking bar to produce, therefore reduce the complexity of design by the shape and the pitch that change groove structure.
[description of drawings]
Fig. 1 is the schematic perspective view of a kind of prior art module backlight.
Fig. 2 is the structural representation of another kind of prior art light guide plate.
Fig. 3 is the structural perspective of light guide plate of the present invention.
Fig. 4 is the front elevation of Fig. 3.
Fig. 5 is the schematic perspective view of the present invention's module backlight.
[embodiment]
Seeing also Fig. 3, is the structural perspective of light guide plate of the present invention, and this light guide plate 21 comprises a body 23 and a dielectric layer 22, and wherein, this dielectric layer 22 comprises an exiting surface 24, and this exiting surface 24 comprises a plurality of groove structures 241.
This dielectric layer 22 is transparent dielectric layers, its refractive index is less than the refractive index of body 23, and its surface is an exiting surface 24, and a plurality of groove structures 241 evenly are set on this exiting surface 24, these a plurality of groove structures 241 can process by precision optical machinery, also can make by micro image etching procedure.Body 23 materials of this light guide plate 21 are polymeric resin materials, as polyacrylic resin, polycarbonate, polyvinyl resin, polymethylmethacrylate etc.
Seeing also Fig. 4 again, is the front elevation of light guide plate of the present invention, the height H of this dielectric layer 22 be 90 μ m to 110 μ m, 100 μ m preferably.The pitch L of this groove structure 241 be 50 μ m to 100 μ m, its vertex angle theta be 75 spend to 115 the degree.
Because the existence of dielectric layer 22 is effectively isolated groove structure 241 and body 23, promptly the interface condition of groove structure 241 becomes dielectric layer 22-air from body 23-air.According to the refractive index law:
sinα/sinβ＝nβ/nα
Wherein α, β are respectively incident angle, refraction angle, and n α, n β are respectively the refractive indexes of the plane of incidence, plane of refraction material.Because the refractive index of dielectric layer 23 is less than the refractive index of body 22, when therefore light is from groove structure 241 outgoing, refraction angle when the refraction angle when interface is dielectric layer 23-air is body 22-air than interface is little, the effect that equivalence confinement groove structure 241 light that cause narrow down, therefore blanking bar can not appear, and this groove structure 241 also plays the light harvesting effect.
Seeing also Fig. 5, is the schematic perspective view of module backlight of the present invention.This module 30 backlight comprises a light source 31 and a light guide plate 32, and this light source 31 is CCFL, and it is arranged on a side of this light guide plate 32.This light guide plate 32 is aforementioned light guide plate shown in Figure 3.In the time of this light guide plate 32 and module backlight 30 designs, only need to consider the refractive index size of dielectric layer 23, do not need to avoid blanking bar to produce, therefore reduce the complexity of design by the shape and the pitch that change groove structure 241.
Module backlight of the present invention is not limited to said structure, such as, light source 31 can be two groups also, lays respectively at the relative both sides of light guide plate 32; Light source 31 also can be positioned at bottom surface 321 1 sides of light guide plate 32.Groove structure can be a V-arrangement, also can be trapezoidal.
Claims (8)
1. light guide plate, it comprises a body, it is characterized in that: this light guide plate comprises that also one is arranged on the dielectric layer on this body, and the refractive index of this dielectric layer is less than the refractive index of this body, this dielectric layer also comprises an exiting surface, and this exiting surface has a plurality of groove structures.
2. light guide plate according to claim 1 is characterized in that: this groove structure can be a V-arrangement or trapezoidal.
3. light guide plate according to claim 1 is characterized in that: this groove structure evenly distributes.
4. light guide plate according to claim 1 is characterized in that: the drift angle of this groove structure is to spend to 115 degree from 75.
5. light guide plate according to claim 1 is characterized in that: the pitch of this groove structure is to 100 μ m from 50 μ m.
6. light guide plate according to claim 1 is characterized in that: the height of this dielectric layer is to 110 μ m from 90 μ m.
7. light guide plate according to claim 6 is characterized in that: height the best of this dielectric layer is 100 μ m.
8. module backlight, it comprises a light guide plate and at least one light source that is arranged on this light guide plate one side, it is characterized in that: this light guide plate any described light guide plate that is claim 1 in the claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031268188A CN1553226A (en) | 2003-06-04 | 2003-06-04 | Light negative mould set and light conducting board thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031268188A CN1553226A (en) | 2003-06-04 | 2003-06-04 | Light negative mould set and light conducting board thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1553226A true CN1553226A (en) | 2004-12-08 |
Family
ID=34322017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031268188A Pending CN1553226A (en) | 2003-06-04 | 2003-06-04 | Light negative mould set and light conducting board thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1553226A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7986383B2 (en) | 2006-12-04 | 2011-07-26 | Samsung Electronics Co., Ltd. | Liquid crystal display device having improved light guide plate |
| CN104571658A (en) * | 2013-10-17 | 2015-04-29 | 鸿富锦精密工业（深圳）有限公司 | Reflection type display module and electronic device using reflection type display module |
| CN107505794A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | A kind of display device and backlight |
| CN107907933A (en) * | 2017-12-29 | 2018-04-13 | 深圳Tcl新技术有限公司 | light guide plate assembly |
-
2003
- 2003-06-04 CN CNA031268188A patent/CN1553226A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7986383B2 (en) | 2006-12-04 | 2011-07-26 | Samsung Electronics Co., Ltd. | Liquid crystal display device having improved light guide plate |
| CN101241264B (en) * | 2006-12-04 | 2012-10-10 | 三星电子株式会社 | Liquid crystal display device having improved light guide plate |
| CN104571658A (en) * | 2013-10-17 | 2015-04-29 | 鸿富锦精密工业（深圳）有限公司 | Reflection type display module and electronic device using reflection type display module |
| CN107505794A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | A kind of display device and backlight |
| CN107907933A (en) * | 2017-12-29 | 2018-04-13 | 深圳Tcl新技术有限公司 | light guide plate assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |