CN100419533C - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN100419533C CN100419533C CNB2004100268172A CN200410026817A CN100419533C CN 100419533 C CN100419533 C CN 100419533C CN B2004100268172 A CNB2004100268172 A CN B2004100268172A CN 200410026817 A CN200410026817 A CN 200410026817A CN 100419533 C CN100419533 C CN 100419533C
- Authority
- CN
- China
- Prior art keywords
- light
- cover
- module backlight
- guide plate
- light source
- 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
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 238000005286 illumination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
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Abstract
The present invention relates to a back light module used for digital image products. The present invention comprises a light source and a light guide plate, wherein the light guide plate comprises a light incident surface, the back light module comprises a cylinder cover which can rotate, the cylinder cover is arranged on the light incident surface side of the light guide plate, the cylinder cover is provided with a light outlet, and the light source is arranged in the cylinder cover corresponding to the light outlet.
Description
[technical field]
The invention relates to a kind of module backlight, particularly about a kind of module backlight that is used in the digitized video product.
[background technology]
Because the liquid crystal itself in the liquid crystal indicator panel is not luminous, therefore, in order to reach display effect, need to give the liquid crystal indicator panel that one planar light source device is provided, as module backlight, its function is to provide the planar light that brightness is abundant and be evenly distributed to the liquid crystal indicator panel, makes its normally show image, therefore 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 digital camera, digital camera etc., module backlight for liquid crystal indicator requires further to improve, show required enough brightness and the uniformity coefficient requirement to have the emphasis that more enhancement function also becomes design of backlight module except satisfying.
See also Fig. 1, it is a kind of module backlight 1 of prior art, this module 1 backlight comprises two light sources 11, a reflecting plate 12, a light guide plate 13, a diffuser plate 14 and a blast sheet 15, and this reflecting plate 12, light guide plate 13, diffuser plate 14 and blast sheet 15 stack gradually placement.This light guide plate 13 is plate shaped, and it comprises an incidence surface 131, a bottom surface 133 that links to each other with this incidence surface 131 and an exiting surface 132 relative with this bottom surface 133, and wherein this light source 11 is with respect to incidence surface 131 settings of this light guide plate 13.The light beam that sends by light source 11, enter this light guide plate 13 and transmission in this light guide plate 13 through this incidence surface 131, part light is through this reflecting plate 12 of bottom surface 133 directives of this light guide plate 13, and this light guide plate 13 of reflex reflected back through this reflecting plate 12, light is finally via this diffuser plate 14 of exiting surface 132 directives of this light guide plate 13, through 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).
But this module backlight is applied in the digitized video product, exists certain not enough during as mobile phone digital camera, digital camera.This type of digitized video product all has camera function, but when the night or the environment of low-light (level), the image sensor of this type of digitized video product usually can be underexposed, and this module backlight can't provide light source to be used for illumination, therefore 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 is used in the digitized video product with illumination functions.
The technical scheme that technical solution problem of the present invention is adopted is: provide a module backlight to comprise a light source and a light guide plate, this light guide plate comprises an incidence surface, wherein this module backlight comprises a rotating tube cover, this cover is arranged on incidence surface one side of this light guide plate, this tube is covered with a light-emitting window, this light source is arranged in this cover with respect to this light-emitting window, and this light-emitting window rotates along with the rotation of this cover.
Compared to existing technology, the invention has the beneficial effects as follows: the light source that the present invention's module backlight has a rotating tube cover and this module backlight is positioned at this cover, make this module backlight and show the required light source function to have the function of illumination simultaneously except that having to provide.When the incidence surface of this light guide plate of light-emitting window subtend of this cover, the light directive light guide plate that this light source sends and enter light guide plate by this incidence surface is used for display image.When making a video recording in need environment in low-light (level), this tube cover rotation, make the captured object of light directive after converging that light source 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, can make full use of the light source of module backlight, strengthen the function and the usability of digitized video product.
[description of drawings]
Fig. 1 is the schematic perspective view of a kind of prior art module backlight.
Fig. 2 is the present invention's module schematic perspective view backlight.
Fig. 3 is the synoptic diagram that the present invention's module backlight is used for display light source.
Fig. 4 is the synoptic diagram that the present invention's module backlight is used for lighting source.
[embodiment]
Seeing also Fig. 2, is the schematic perspective view of the present invention's module backlight.Module backlight 2 of the present invention comprises a light source 21 and a light guide plate 22, this light guide plate 22 is plate shaped, it comprises an incidence surface 221 and an exiting surface 222 that links to each other with this incidence surface 221, and this light guide plate 22 is used to guide and transmit the light that this light source 21 sends, and this light source is a light emitting diode.
This module 2 backlight comprises a cover 23, and this cover 23 is positioned at incidence surface 221 1 sides of this light guide plate 22, and this cover 23 is fixed on the rotating shaft pillar 30, and this rotating shaft pillar 30 turns and drives this cover 23 and rotates.This cover 23 has a light-emitting window 231, this light source 21 is arranged in this cover 23 with respect to this light-emitting window 231, the drives device 211 of this light source 21 is arranged on these cover 23 inwalls, this light source 21 links to each other with this drives device 211, this drives device 211 links to each other with the integration control circuit (figure does not show) of this module 2 backlight, thereby controls the duty of this light source 21.The inwall of this cover 23 is the light reflection surfaces with high reflectance, the outer wall of this cover 23 is provided with stop means 40, the rotational angle of this cover 23 of these stop means 40 may command, the rotatable angle of this cover 23 is 0～90 degree, and this stop means 40 can be set to a plurality of better rotations of application cylinder cover 23.The light-emitting window 231 of this cover 23 is provided with a lens pillar 24, and the outside curvature of this lens pillar 24 is identical with the inwall curvature of this cover 23.
Seeing also Fig. 3 and Fig. 4, is respectively the synoptic diagram that this module backlight is used for display light source and lighting source.When this module 2 backlight provides the light time for liquid crystal indicator (figure does not show), the light-emitting window 231 of this cover 23 is over against the incidence surface 221 of this light guide plate 22, the light that this light source 21 sends finally converges back this light guide plate 22 of directive by this lens pillar 24 after the reflection of these cover 23 inwalls, light is finally penetrated by the exiting surface 222 of this light guide plate 22 after the guiding transmission of this light guide plate 22, satisfies the brightness of liquid crystal indicator demonstration and the requirement of uniformity coefficient.
When carrying out camera function in the environment of digitized video product need in low-light (level), can make that this rotating shaft pillar 30 rotates by the mode that hand rotation or motor drive, rotate thereby drive this cover 23, stop after this stop means 40 makes this cover 23 revolve to turn 90 degrees.This moment, this covered the 231 pairs of objects that will take of light-emitting window of 23, so the light that this light source 21 sends finally converges back this object of directive by this lens pillar 24 after the reflection of these cover 23 inwalls, make this reflected by objects light intensity 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 21 that the present invention's module 2 backlight has a rotating tube cover 23 and this module 2 backlight is positioned at this cover 23, makes this module 2 backlight except having to provide and shows the required light source function illumination functions that has simultaneously.When the incidence surface 221 of this cover this light guide plate 22 of light-emitting window 231 subtends of 23, this light guide plate 22 of the light directive that this light source 21 sends also enters light guide plate 2 by this incidence surface 221, is used for display image.When making a video recording in the environment of need in low-light (level), these tube cover 23 rotations, the light process that makes light source 21 send converges the captured object of back directive, increase the intensity of reflected light of object, thereby make the digitized video product receive enough light, satisfy the required lighting requirement of shooting, make full use of the light source of module 2 backlight, strengthen the function and the usability of digitized video product.
Claims (10)
1. module backlight, it comprises a light source and a light guide plate, this light guide plate comprises an incidence surface, it is characterized in that: this module backlight comprises a rotating tube cover, this cover is arranged on incidence surface one side of this light guide plate, this tube is covered with a light-emitting window, and this light source this light-emitting window relatively is arranged in this cover, and this light-emitting window rotates along with the rotation of this cover.
2. module backlight according to claim 1 is characterized in that: this cover is fixed on the rotating shaft pillar.
3. module backlight according to claim 1 is characterized in that: the inwall of this cover is the light reflection surface with high reflectance.
4. module backlight according to claim 1 is characterized in that: the light-emitting window of this cover is provided with a cylindrical lens.
5. module backlight according to claim 4 is characterized in that: the outside curvature of this cylindrical lens is identical with the inwall curvature of this cover.
6. module backlight according to claim 1 is characterized in that: the rotating angle of this cover is 0～90 degree.
7. module backlight according to claim 1 is characterized in that: this light source is a light emitting diode.
8. module backlight according to claim 1 is characterized in that: the outer wall of this cover is provided with stop means.
9. module backlight according to claim 1 is characterized in that: this light source comprises a drives device.
10. module backlight according to claim 9 is characterized in that: this drives device is arranged on this cover inwall and with this light source and links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100268172A CN100419533C (en) | 2004-04-08 | 2004-04-08 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100268172A CN100419533C (en) | 2004-04-08 | 2004-04-08 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1680850A CN1680850A (en) | 2005-10-12 |
| CN100419533C true CN100419533C (en) | 2008-09-17 |
Family
ID=35067491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100268172A Expired - Fee Related CN100419533C (en) | 2004-04-08 | 2004-04-08 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100419533C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002100213A (en) * | 2000-09-20 | 2002-04-05 | Ichikoh Ind Ltd | Light guide structure for vehicle lighting |
| CN2495902Y (en) * | 2001-07-12 | 2002-06-19 | 王默文 | Protective cover for fluorescent tube having light conducting plate for super-thin lamp box |
| US20040001341A1 (en) * | 2002-06-28 | 2004-01-01 | Au Optronics Corp. | Light-emitting apparatus able to dynamically produce lights of different wavelengths |
-
2004
- 2004-04-08 CN CNB2004100268172A patent/CN100419533C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002100213A (en) * | 2000-09-20 | 2002-04-05 | Ichikoh Ind Ltd | Light guide structure for vehicle lighting |
| CN2495902Y (en) * | 2001-07-12 | 2002-06-19 | 王默文 | Protective cover for fluorescent tube having light conducting plate for super-thin lamp box |
| US20040001341A1 (en) * | 2002-06-28 | 2004-01-01 | Au Optronics Corp. | Light-emitting apparatus able to dynamically produce lights of different wavelengths |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1680850A (en) | 2005-10-12 |
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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 | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20170408 |