CN100419517C - Back light module - Google Patents
Back light module Download PDFInfo
- Publication number
- CN100419517C CN100419517C CNB200410026925XA CN200410026925A CN100419517C CN 100419517 C CN100419517 C CN 100419517C CN B200410026925X A CNB200410026925X A CN B200410026925XA CN 200410026925 A CN200410026925 A CN 200410026925A CN 100419517 C CN100419517 C CN 100419517C
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- CN
- China
- Prior art keywords
- light source
- light
- guide plate
- light guide
- reflector plate
- 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.)
- Expired - Fee Related
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
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- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention relates to a back light module. The present invention comprises a light guide plate, a light source and a light source cover, wherein the light guide plate comprises a light incident surface, the light source is arranged on the side of the light incident surface of the light guide plate, the light source cover is matched with the light source and partially encloses the light source, the light source cover is provided with an opening, a rotating mechanism and a reflecting sheet is arranged between the light guide plate and the light source, and the rotation of the reflecting sheet is controlled by the rotating mechanism.
Description
[technical field]
The present invention relates to a kind of module backlight, particularly about a kind of module backlight that is used for the digitized video product.
[background technology]
Because the liquid crystal itself in the liquid crystal indicator panel can not be luminous, therefore, for reaching display effect, one planar light source device is provided for the liquid crystal indicator panel, as module backlight. the function of module backlight is to provide the planar light that brightness is abundant and be evenly distributed to the liquid crystal indicator panel, make its normally show image, thereby module backlight becomes one of key component of liquid crystal indicator.
Continuous expansion along with the liquid crystal indicator application, the particularly application of digitized video product, as mobile phone, mobile phone digital camera, digital camera etc., module backlight for liquid crystal indicator requires further to improve, remove and satisfy demonstration required enough brightness and uniformity coefficient requirement, have the emphasis that more enhancement function also becomes design of backlight module.
See also Fig. 1, it is a kind of module backlight 1 of prior art, this module 1 backlight comprises a light source 11, one light source cover 16, one reflector plate 12, one light guide plate 13, one diffuser plate 14 and a blast sheet 15, this reflector plate 12, light guide plate 13, diffuser plate 14 and blast sheet 15 stack gradually placement. and this light source cover 16 and this light source 11 cooperate, and part is surrounded these light source 11. these light guide plate 13 for plate shaped, it comprises an incidence surface 131, one with perpendicular bottom surface 133 of this incidence surface 131 and an exiting surface 132 relative with this bottom surface 133, wherein the incidence surface 131 of these light source 11 relative these light guide plate 13 is provided with. the light beam that sends by light source 11, enter this light guide plate 13 and transmission in this light guide plate 13 from this incidence surface 131, part light is through this reflector plate 12 of bottom surface 133 directives of this light guide plate 13, again through this light guide plate 13 of reflex reflected back of this reflector plate 12, light finally passes through this diffuser plate 14 of exiting surface 132 directives of this light guide plate 13, via this blast sheet 15 of directive after the diffusion of this diffuser plate 14, these blast sheet 15 surfaces are evenly distributed with a plurality of parallel prism structures 151, and this prism structure 151 is assembled this light beam and directed toward display panel (figure does not show).
Yet; development along with digital electronic product; as mobile phone, digital camera and digital camera etc. with camera function adopt the digital product of liquid crystal indicator; this type of digitized video product all has camera function; when the environment of night or low-light (level); the image sensor of this type of digitized video product usually can be underexposed, can't make a video recording.
[summary of the invention]
In order to overcome the problem that digitized video product in the prior art can't be made a video recording at night or the environment of low-light (level), the invention provides a kind of module backlight that can be used on above-mentioned digitized video product with illumination functions.
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, one light source and a light source cover, this light guide plate comprises an incidence surface, this light source is arranged on incidence surface one side of this light guide plate, this light source cover and this light source cooperate and part is surrounded this light source, and this light source cover has an opening, this opening is between the incidence surface of this light source and this light guide plate, one rotating mechanism and a reflector plate are arranged between the incidence surface of this light guide plate and this light source, and the rotation that this rotating mechanism is controlled this reflector plate is optionally passed the opening on this light source cover and/or the incidence surface of this light guide plate with the light of regulating this light source and sending.
Compared to prior art, the light source cover of the present invention's module backlight has an opening, one rotating mechanism and a reflector plate, control the rotation of this reflector plate by this rotating mechanism, make when this module backlight is used for as digital video camera, show the required light source except that providing for liquid crystal indicator, the function that also has illumination. when this rotating mechanism goes to the opening part of this light source cover with this reflector plate, this reflector plate blocks this opening fully, at this moment, the light directive light guide plate of being sent by this light source also enters light guide plate by this incidence surface, be used for showing. when need when the environment of low-light (level) is made a video recording, regulate this rotating mechanism, make it this reflector plate gone to and this light source emergent light direction at angle, after then the light that sends of light source was incident upon reflecting surface, the reflection back was penetrated by the opening part of this light source cover, make the captured object of light directive that light source sends, increase the intensity of reflected light of object, thereby make the digitized video product accept enough light, satisfy the required lighting requirement of shooting.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of a kind of prior art module backlight.
Fig. 2 is the front elevation of the present invention's module first embodiment backlight.
Fig. 3 is the vertical view of the present invention's module first embodiment backlight.
Fig. 4 is the principle of work synoptic diagram of the present invention's module first embodiment backlight.
Fig. 5 is the principle of work synoptic diagram of the present invention's module first embodiment backlight.
[embodiment]
Please together consulting Fig. 2 and Fig. 3, is respectively the front elevation and the vertical view of the present invention's module first embodiment backlight. this module 2 backlight comprises a light guide plate 21, a light source 23, one and this light source 23 light source cover 25, a rotating mechanism 27 and the reflector plate 29. that cooperate
This light guide plate 21 comprises an incidence surface 211 and an exiting surface 212, this exiting surface 212 is vertical mutually with this incidence surface 211. and this light source 23 is arranged on this incidence surface 211 1 sides, it is connected with driving circuit (figure does not show), light source 23 is line sources in the present embodiment, also can be pointolite. these light source cover 25 parts are surrounded this light source 23, these light source cover 25 1 ends are fixed on the exiting surface 212 of light guide plate 21, and its inwall is a reflecting surface; Light source cover 25 is established one in the one side that is parallel to exiting surface 212 and is opened 251, one lens, 26. these rotating mechanisms 27 are installed in this opening 251 comprise a knob 271 and one 273, this axle 273 is arranged on incidence surface 211 tops, the one end is by connecting knob 271 its rotations of control. and this reflector plate 29 is fixed on this axle 273, drive the rotation of reflector plate 29 during axle 273 rotations, reflector plate 29 is total reflection reflector plates.
Please together consult Fig. 4 and Fig. 5, be the principle of work synoptic diagram of the present invention's module first embodiment backlight. when this light source 23 provides light for light guide plate 21, by rotating this knob 271, to go to light source cover 25 1 ends with this 273 reflector plate that is connected 29, and reflector plate 29 blocks these lens 26. at this moment fully, the light that sends through light source 23 is by incidence surface 211 incidents of light guide plate 21, and by exiting surface 212 outgoing, reaches the brightness that liquid crystal indicator shows and the requirement of uniformity coefficient.
When carrying out camera function in the environment of digitized video product need that adopts module backlight of the present invention in low-light (level), by rotating this knob 271, to go to away from light source cover 25 1 ends with this 273 reflector plate that is connected 29, and and these light source 23 emergent light directions are at angle. at this moment, the light that sends through light source 23 arrives reflector plate 29, after reflector plate 29 reflections, converge the back outgoing by lens 26, make the light intensity that exposes to object strengthen, thereby make the digitized video product receive enough light, with the requirement of taking in the environment that satisfies low-light (level).
The light source cover 25 of the present invention's module 2 backlight has out 251, one rotating mechanism 27 and a reflector plate 29, make this module 2 backlight and show the required light source function except that having to provide, also have illumination functions. when this reflector plate 29 blocks this opening 251, the light directive light guide plate 21 that this light source 23 sends also enters light guide plate 21 by this incidence surface 211, be used for showing. when need when the environment of low-light (level) is made a video recording, these reflector plate 29 rotations, make the captured object of light directive after converging that light source 23 sends, increase the intensity of reflected light of object, thereby make the digitized video product receive enough light, satisfy the required lighting requirement of shooting, strengthen the function and the usability of digitized video product.
The difference of the present invention's module second embodiment backlight and first embodiment is: the reflector plate of coupling shaft is the semi-penetration semi-reflective reflector plate. when this reflector plate goes to away from light source cover one end, and and this light source emergent light direction at angle the time, owing to adopt the semi-penetration semi-reflective reflector plate, still have part light to be incident upon the incidence surface of light guide plate, and by the exiting surface outgoing. the present invention's module second embodiment backlight is except that the advantage with first embodiment, also have the following advantages: when light source emits beam when being incident upon object, still have part light to be incident upon light guide plate, make that liquid crystal display area is bright attitude, can better carry out the image photography.
Claims (9)
1. module backlight, it comprises a light guide plate, one light source and a light source cover, this light guide plate comprises an incidence surface, this light source is arranged on incidence surface one side of this light guide plate, this light source cover and this light source cooperate and part is surrounded this light source, it is characterized in that: this light source cover has an opening, this opening is between the incidence surface of this light source and this light guide plate, one rotating mechanism and a reflector plate are arranged between the incidence surface of this light guide plate and this light source, and the rotation that this rotating mechanism is controlled this reflector plate is optionally passed the opening on this light source cover and/or the incidence surface of this light guide plate with the light of regulating this light source and sending.
2. module backlight according to claim 1 is characterized in that: this rotating mechanism comprises a knob and one.
3. module backlight according to claim 2 is characterized in that: an end of this reflector plate is fixed in this axle.
4. module backlight according to claim 3 is characterized in that: this reflector plate is the total reflection reflector plate.
5. module backlight according to claim 3 is characterized in that: this reflector plate is the semi-penetration semi-reflective reflector plate.
6. module backlight according to claim 1 is characterized in that: this light source is a line source.
7. module backlight according to claim 1 is characterized in that: this light source is a pointolite.
8. module backlight according to claim 1 is characterized in that: this light source cover inwall is a reflecting surface.
9. module backlight according to claim 1 is characterized in that: the opening part of this light source cover has lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410026925XA CN100419517C (en) | 2004-04-15 | 2004-04-15 | Back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410026925XA CN100419517C (en) | 2004-04-15 | 2004-04-15 | Back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1683965A CN1683965A (en) | 2005-10-19 |
| CN100419517C true CN100419517C (en) | 2008-09-17 |
Family
ID=35263368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410026925XA Expired - Fee Related CN100419517C (en) | 2004-04-15 | 2004-04-15 | Back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419517C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725915B (en) * | 2008-10-21 | 2012-03-28 | 鸿富锦精密工业（深圳）有限公司 | Back light module |
| CN103973856B (en) * | 2013-02-05 | 2016-12-28 | 联想移动通信科技有限公司 | A kind of mobile terminal |
| CN103343923A (en) * | 2013-07-11 | 2013-10-09 | 创维液晶器件(深圳)有限公司 | Backlight module and liquid crystal display device with backlight module |
| CN118915356A (en) * | 2024-09-12 | 2024-11-08 | 深圳市富成欣光电有限公司 | Backlight module capable of adjusting light emitting angle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042779A (en) * | 1988-10-07 | 1990-06-06 | 古尔顿工业公司 | Illuminating system |
| JPH1020397A (en) * | 1996-06-28 | 1998-01-23 | Fuji Photo Film Co Ltd | Overhead projector |
| JP2000111909A (en) * | 1998-10-05 | 2000-04-21 | Canon Inc | Lighting device of liquid crystal device |
| JP2002036910A (en) * | 2000-07-28 | 2002-02-06 | Nippon Seiki Co Ltd | Angle adjusting device ! integrated vehicle control system |
-
2004
- 2004-04-15 CN CNB200410026925XA patent/CN100419517C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042779A (en) * | 1988-10-07 | 1990-06-06 | 古尔顿工业公司 | Illuminating system |
| JPH1020397A (en) * | 1996-06-28 | 1998-01-23 | Fuji Photo Film Co Ltd | Overhead projector |
| JP2000111909A (en) * | 1998-10-05 | 2000-04-21 | Canon Inc | Lighting device of liquid crystal device |
| JP2002036910A (en) * | 2000-07-28 | 2002-02-06 | Nippon Seiki Co Ltd | Angle adjusting device ! integrated vehicle control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1683965A (en) | 2005-10-19 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20170415 |
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| CF01 | Termination of patent right due to non-payment of annual fee |