CN100405160C - Back light module and its light guide plate - Google Patents
Back light module and its light guide plate Download PDFInfo
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- CN100405160C CN100405160C CNB200410077293XA CN200410077293A CN100405160C CN 100405160 C CN100405160 C CN 100405160C CN B200410077293X A CNB200410077293X A CN B200410077293XA CN 200410077293 A CN200410077293 A CN 200410077293A CN 100405160 C CN100405160 C CN 100405160C
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- light
- guide plate
- light guide
- photoreceptor
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- Light Guides In General And Applications Therefor (AREA)
Abstract
The present invention provides a backlight module and a light guide plate. The backlight module comprises a light guide plate and a built-in light source, wherein the light guide plate comprises a body and a light switching device; the body comprises two light incident surfaces correspondingly arranged; the light switching device is arranged adjacently to one of the two light incident surfaces. The built-in light source is arranged at the position close to the other light incident plate away from the light switching device which comprises a light receiving body and an isolating body. When external light rays are strong, the external light rays project from the light receiving body and are transmitted to the body; when the external light rays are weak, the light rays are provided by the built-in light source and transmitted to the body. Under the condition of high irradiance of the external light rays, the backlight module can fully utilize the external light rays so as to lower energy consumption.
Description
[technical field]
The invention relates to a kind of module backlight and light guide plate thereof.
[background technology]
Because advantages such as LCD has gently, approaches, power consumption is little are widely used in modernized information equipment such as notebook computer, mobile phone, personal digital assistant.Because the liquid crystal in the LCD itself is not had a characteristics of luminescence, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as module backlight, its function is to provide briliancy fully and the area source that is evenly distributed to panel of LCD.Module backlight can be divided into two kinds of side-light type module backlight and down straight aphototropism mode set by structure.Wherein, down straight aphototropism mode set is mainly used in fields such as LCD monitor or LCD TV.
See also Fig. 1, the module backlight of the prior art that a kind of industry is commonly used mainly is made up of light source 5, light source cover 6, light guide plate 3, reflecting plate 4, diffuser plate 2 and two light-collecting pieces 1.Wherein, this light source 5 is a line source, mainly contain electroluminescent lamp (Electroluminiscent Lamp, EL) and cold-cathode fluorescence lamp (Cold Cathode Fluorescence Lamp, CCFL) two kinds, it is arranged at light guide plate 3 one sides, the cooperation by light source cover 6 with light transmission to this light guide plate 3.The light that the effect of this light guide plate 3 is to send in guide lights source 5 improves display panel (figure does not show) glorious degrees and homogeneity simultaneously from exiting surface 7 outgoing.Reflecting plate 4 is arranged at a side of the bottom surface 8 of this light guide plate 3, being reflected into once more in this light guide plate 3 by the light of bottom surface 8 outgoing of light guide plate 3, improves the utilization factor of light.Two surfaces up and down of diffuser plate 2 are provided with minute protrusions (figure does not show), and it act as softization of pattern that will incide the light scatter in the diffuser plate 2 and make display panel.Light-collecting piece 1 also claims prism plate, and its effect is that light is produced the effect of converging, and to improve the bright dipping briliancy of module backlight, reduces power consumption.
Another kind of industry module existing backlight commonly used as shown in Figure 2, this module 10 backlight comprises that light source 20 and that a light guide plate 22, is positioned at these light guide plate 22 1 sides is arranged on the reflecting plate 23 of these light guide plate 22 belows.This light source 20 constitutes (only illustrating two among the figure) by a plurality of LED, and this light guide plate 22 comprises an exiting surface 221 that is made of a plurality of equally distributed trickle V-shaped grooves.
During use,, light LED, inject light guide plate 20 also by the reflection of reflecting plate 23,, be projected to display panel (figure does not show), finish Presentation Function at last by exiting surface 221 outgoing by the light that LED sends by drive unit (figure does not show) driving light source 20.
Yet the light source 20 of this module 10 backlight is only served as by LED.In the use, LED is in the state alive that hits all the time, even under extraneous light illumination condition with higher, also can't make full use of extraneous light, with the reduction energy resource consumption, thereby saves use cost.
[summary of the invention]
Can't make full use of extraneous light for overcoming prior art module backlight, and then energy resource consumption is big, the use cost problem of higher, the invention provides a kind of module backlight, this module backlight can make full use of extraneous light with energy savings consumption, reduction use cost under extraneous light illumination condition with higher.
Can't make full use of extraneous light for overcoming the prior art light guide plate, and then energy resource consumption is big, the use cost problem of higher, the invention provides a kind of light guide plate, this light guide plate can make full use of extraneous light with energy savings consumption, reduction use cost under extraneous light illumination condition with higher.
The present invention's module backlight comprises a light guide plate and a built-in light source.Described light guide plate comprises a body and a light shifter.This body comprises two incidence surfaces that are provided with relatively.Contiguous one of them setting of this incidence surface of this light shifter.This built-in light source is located near another incidence surface away from this light shifter.This light shifter comprises a photoreceptor and an isolated body, when extraneous light is strong, extraneous light is from this photoreceptor incident and transfer to this body, and to small part ambient light line from this photoreceptor incident and to transfer to this body be that reflection by this isolated body realizes; When extraneous light was more weak, light provided and transfers to this body by this built-in light source.
Light guide plate of the present invention comprises a body and a light shifter.This body comprises two incidence surfaces that are provided with relatively.Contiguous one of them setting of this incidence surface of this light shifter.This light shifter comprises a photoreceptor and an isolated body, when extraneous light is strong, extraneous light is from this photoreceptor incident and transfer to this body, and to small part ambient light line from this photoreceptor incident and to transfer to this body be that reflection by this isolated body realizes; When extraneous light was more weak, light provided and transfers to this body by near the built-in light source another incidence surface of being located at this light guide plate.
Relative prior art, because of the present invention's module backlight and light guide plate thereof include a light shifter, it comprises a photoreceptor and an isolated body, when extraneous light was strong, extraneous light was from this photoreceptor incident and transfer to this body; When extraneous light was more weak, light provided and transfers to this body by near the built-in light source another incidence surface of being located at this light guide plate.Be that the present invention's module backlight and light guide plate thereof can make full use of extraneous light with the reduction energy resource consumption, thereby save use cost.
[description of drawings]
Fig. 1 is the perspective view of prior art module backlight.
Fig. 2 is the perspective view of the module backlight of another kind of prior art.
Fig. 3 is the perspective view of the present invention's module first embodiment backlight.
Fig. 4 is the front view of Fig. 3.
Fig. 5 be in the present invention's module first embodiment backlight when ambient light intensity is strong, extraneous light is by the working state schematic representation of photoreceptor incident.
Fig. 6 be in the present invention's module first embodiment backlight when ambient light intensity is more weak, the working state schematic representation of incident ray is provided by built-in light source.
Fig. 7 is the perspective view of the present invention's module second embodiment backlight.
Fig. 8 be in the present invention's module second embodiment backlight when the ambient light line strength is strong, extraneous light is by the working state schematic representation of photoreceptor incident.
Fig. 9 be in the present invention's module second embodiment backlight when the ambient light line strength is more weak, the working state schematic representation of incident ray is provided by built-in light source.
[embodiment]
Please consulting Fig. 3 to Fig. 4 together, is the schematic perspective view and the front view thereof of the present invention's module first embodiment backlight.This module 30 backlight comprises a light guide plate 31, one built-in light sources 32 and a reflecting plate 33.
This light guide plate 31 comprises a body 313 and a light shifter 310.This body 313 is a parallelepiped structure, material is transparent polymeric resin or glass, this body 313 has one and is positioned at the exiting surface 3131, at its top and the bottom surface 315 that this exiting surface 3131 is oppositely arranged, and two incidence surfaces that are oppositely arranged 314 that are sandwiched between exiting surface 3131 and the bottom surface 315.310 contiguous these two incidence surfaces, 314 one of them settings of this light shifter are that example is illustrated to be located at the left side in the present embodiment.This light shifter 310 comprises a photoreceptor 311 and an isolated body 312, and one can be made and be pasted on mutually to this photoreceptor 311 respectively with body 313, and the two also can be one-body molded, and present embodiment is one-body molded.The outer surface 3111 of this photoreceptor 311 can be the face of cylinder or the spherical crown surface array that comprises at least one spherical crown surface, the preferred face of cylinder of present embodiment.Correspondingly, the shape and the described outer surface 3111 of the interior contoured surface 3121 of the isolated body 312 adjacent with this photoreceptor 311 match.But materials such as the gold, silver of contoured surface 3121 apparatus high light reflectivity or aluminium foil make in described, also can plate with high reflection layer thereon to get.In addition, this isolated body 312 can move relative to the outer surface 3111 of this photoreceptor 311.
This built-in light source 32 is located near another incidence surface 314 away from light shifter 310, and this built-in light source 32 can be single or multiple such as pointolites such as LED, also can be line sources such as CCFL, is two LED in the present embodiment.
The bottom surface 315 of these reflecting plate 33 contiguous described bodies 313 is provided with.
Please in conjunction with consulting Fig. 5 to Fig. 6.In the use, when extraneous light b1 is strong, described built-in light source 32 is in closed condition (for the exigent occasion of display quality, built-in light source 32 also can be opened simultaneously, as replenishing of extraneous light b1), isolated body 312 moves to and deviates from the external light source place, i.e. the middle and lower part of photoreceptor 311 outer surfaces 3111 in the present embodiment.Extraneous light b1 is from the middle and upper part incident of this outer surface 3111, and the reflection of the interior contoured surface 3121 by this isolated body 312 transfers to this body 313, and from exiting surface 3131 outgoing, final directive display panel (figure does not show) is finished Presentation Function.When extraneous light b1 is more weak, this isolated body 312 moves to the middle part of these photoreceptor 311 outer surfaces 3111, this moment, built-in light source 32 was in the state alive that hits, incident ray a1 provides and transfers to this body by this built-in light source 32, and by the interior contoured surface 3121 of isolated body 312 and the reflection of reflecting plate 33, from exiting surface 3131 outgoing, final directive display panel is finished Presentation Function.
Relative prior art, because of the light guide plate 31 of this module 30 backlight comprises a light shifter 310, it comprises a photoreceptor 311 and an isolated body 312, when extraneous light b1 was strong, extraneous light b1 was from these photoreceptor 311 incidents and transfer to this body 313; When extraneous light b1 was more weak, incident ray a1 provided and transfers to this body 313 by built-in light source 32.Be that the present invention's module 30 backlight and light guide plate 31 thereof can make full use of extraneous light b1 with the reduction energy resource consumption, thereby save use cost.
Seeing also Fig. 7, is the perspective view of the present invention's module second embodiment backlight.This module 40 backlight comprises a built-in light source 42 and a light guide plate 41, and this light guide plate 41 comprises a body 43 and a light shifter 44, and this light shifter 44 comprises a photoreceptor 442 and an isolated body 441.With respect to first embodiment, the improvements of this module 40 backlight are: this photoreceptor 442 is rollers, and this roller can be around these body 43 rotations relatively of its central shaft, and its outer surface matches with the incidence surface 416 that is close to it.This isolated body 441 is located on this roller part surface radially.In addition, the bottom surface of this body 43 is provided with reflection layer (figure does not show).
Please in conjunction with consulting Fig. 8 and Fig. 9.In the use, when extraneous light b2 was strong, described built-in light source 42 was in closed condition, and described isolated body 441 rotates to and deviates from extraneous light b2 place, i.e. the middle and lower part of photoreceptor 442 outer surfaces in the present embodiment.Extraneous light b1 is from the middle and upper part incident of this outer surface, and the reflection by this isolated body 441 transfers to this body 43, and from the exiting surface outgoing, final directive display panel (figure does not show) is finished Presentation Function.When extraneous light b2 is more weak, this isolated body 441 moves to and incidence surface 416 place that matches, this moment, built-in light source 42 was in the state alive that hits, incident ray a2 provides and transfers to this body 43 by this built-in light source 42, by isolated body 411 and be located at the reflection in the reflection horizon of bottom surface, from the exiting surface outgoing, final directive display panel is finished Presentation Function.
Claims (13)
1. light guide plate, it comprises a body, this body comprises two incidence surfaces that are provided with relatively, it is characterized in that: this light guide plate also comprises the light shifter of contiguous this one of them setting of incidence surface, this light shifter comprises a photoreceptor and an isolated body, when extraneous light was strong, extraneous light was from this photoreceptor incident and transfer to this body, and to small part ambient light line from this photoreceptor incident and to transfer to this body be that reflection by this isolated body realizes; When extraneous light was more weak, light provided and transfers to this body by near the built-in light source another incidence surface of being located at this light guide plate.
2. light guide plate as claimed in claim 1, it is characterized in that: when extraneous light is more weak, the light that should be provided by built-in light source when transferring near this light shifter incidence surface via body part, reflexes to body by this isolated body with this part light again.
3. light guide plate as claimed in claim 1 is characterized in that: this photoreceptor and this body are one-body molded.
4. light guide plate as claimed in claim 1 is characterized in that: this photoreceptor is to be pasted on mutually with this body.
5. light guide plate as claimed in claim 1 is characterized in that: this photoreceptor is can be around the roller of its central shaft rotation, and its outer surface matches with the incidence surface that is close to it.
6. light guide plate as claimed in claim 5 is characterized in that: this isolated body is located on the radial component surface of this roller.
7. light guide plate as claimed in claim 6 is characterized in that: when extraneous light was more weak, this isolated body rotated to and the incidence surface place that matches.
8. light guide plate as claimed in claim 6 is characterized in that: when extraneous light was strong, this isolated body rotated to and deviates from extraneous light place.
9. light guide plate as claimed in claim 1 is characterized in that: the outer surface of this photoreceptor is the face of cylinder, and interior contoured surface shape and this outer surface of this isolated body match.
10. light guide plate as claimed in claim 1 is characterized in that: the outer surface of this photoreceptor comprises at least one spherical crown surface, and interior contoured surface shape and this outer surface of this isolated body match.
11. light guide plate as claimed in claim 1 is characterized in that: the inside surface of this isolated body is a light reflection surface.
12. light guide plate as claimed in claim 11 is characterized in that: the material of this light reflection surface is an aluminium foil.
13. a module backlight, it comprises that a light guide plate and is arranged on the built-in light source of this light guide plate one side, is characterized in that: this light guide plate any described light guide plate that is claim 1 in the claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410077293XA CN100405160C (en) | 2004-12-03 | 2004-12-03 | Back light module and its light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410077293XA CN100405160C (en) | 2004-12-03 | 2004-12-03 | Back light module and its light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1782801A CN1782801A (en) | 2006-06-07 |
| CN100405160C true CN100405160C (en) | 2008-07-23 |
Family
ID=36773175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410077293XA Expired - Fee Related CN100405160C (en) | 2004-12-03 | 2004-12-03 | Back light module and its light guide plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100405160C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236123A (en) * | 2011-07-04 | 2011-11-09 | 林胜军 | Light guide structure with multiple three-dimensional incident faces |
| CN104678651A (en) * | 2015-03-30 | 2015-06-03 | 信利半导体有限公司 | Display device and vehicle-mounted head-up display system |
| CN106908891A (en) * | 2017-03-02 | 2017-06-30 | 张模辉 | A kind of glass light guide plate and apply its lamination big-power solar cell panel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5748237A (en) * | 1993-12-20 | 1998-05-05 | Sony Corporation | Backlighting and color control arrangement for LCD type video camera viewfinder having multiple backlighting sources |
| JPH11249136A (en) * | 1998-03-05 | 1999-09-17 | Sony Corp | Back light device |
| JP2002090739A (en) * | 2000-09-18 | 2002-03-27 | Kyocera Corp | Liquid crystal display |
| CN1495482A (en) * | 2002-08-05 | 2004-05-12 | ��������ʾ���Ƽ���˾ | Back light assembly structure for liquid crystal display |
-
2004
- 2004-12-03 CN CNB200410077293XA patent/CN100405160C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5748237A (en) * | 1993-12-20 | 1998-05-05 | Sony Corporation | Backlighting and color control arrangement for LCD type video camera viewfinder having multiple backlighting sources |
| JPH11249136A (en) * | 1998-03-05 | 1999-09-17 | Sony Corp | Back light device |
| JP2002090739A (en) * | 2000-09-18 | 2002-03-27 | Kyocera Corp | Liquid crystal display |
| CN1495482A (en) * | 2002-08-05 | 2004-05-12 | ��������ʾ���Ƽ���˾ | Back light assembly structure for liquid crystal display |
Non-Patent Citations (1)
| Title |
|---|
| 背光源结构分析及几种提高亮度的途径. 邹跃军，任丁.液晶与显示，第17卷第6期. 2002 * |
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| Publication number | Publication date |
|---|---|
| CN1782801A (en) | 2006-06-07 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20080723 Termination date: 20171203 |