CN202041675U - Light guide plate and side light type backlight module with same - Google Patents
Light guide plate and side light type backlight module with same Download PDFInfo
- Publication number
- CN202041675U CN202041675U CN2011200465246U CN201120046524U CN202041675U CN 202041675 U CN202041675 U CN 202041675U CN 2011200465246 U CN2011200465246 U CN 2011200465246U CN 201120046524 U CN201120046524 U CN 201120046524U CN 202041675 U CN202041675 U CN 202041675U
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- light
- guide plate
- light guide
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Abstract
The utility model discloses a light guide plate used for a side light type backlight module and the side light type backlight module with the same. The light guide plate comprises a substrate and an optical diaphragm. The substrate is provided with an incident plane located on one side edge of the substrate, and rays enter the substrate through the incident plane. The optical diaphragm is adhered to the incident plane and used for diffusing the rays and guiding the rays into the substrate. By means of adhering the optical diaphragm to the incident plane of the light guide plate, the problem of uneven light and shade similar to a head lamp caused by the facts that the number of the existing light emitting diodes is reduced and the distance between the light emitting diodes and the incident plane is shortened is solved.
Description
Technical field
The utility model is about a kind of light guide plate, is meant a kind of side-light type module backlight that is used for the light guide plate of side-light type module backlight and comprises this light guide plate especially.
Background technology
(Light Emitting Diode LED) replaces cathode fluorescent tube because of having advantages such as low power consumption, life-span length, no mercury to light emitting diode gradually, becomes the main flow of backlight.The LED-backlit technology can be divided into straight-down negative (direct-lit) and two kinds of side-light types (edge-lit), and wherein side-light type becomes the mainstream technology that the LED-backlit module is adopted gradually because of having frivolous characteristic.
See also shown in Figure 1ly, Fig. 1 is the known schematic top plan view of utilizing LED as the side-light type module backlight of light source.When using LED as the light source of side-light type module backlight, the uniformity coefficient of light is the emphasis that override is considered.Generally speaking, LED crystal grain (die) 10 is close more in the configuration upper density of light guide plate 20 1 sides, LED crystal grain 10 is far away more from the distance H of light guide plate 20 incidence surfaces 22, and the uniformity coefficient of its light in light guide plate is good more.Yet the density that LED crystal grain 10 is arranged is subject to price, available space and actual heat dissipation problem usually, so that a configuration of following the tight LED of an arrangement crystal grain 10 is unpractical.
In addition, because LED technology superior, the brightness of LED improves day by day, so the use amount of LED crystal grain 10 can reduce and reaches the required identical briliancy requirement of module backlight.In addition, LED crystal grain 10 and incidence surface 22 distance H are the relation of inverse ratio for the briliancy of module backlight.Therefore, for promoting the number minimizing that therefore briliancy reduces distance H and LED crystal grain 10, this will cause module backlight to produce the seemingly phenomenon of the light and shade inequality of head lamp shape in the light inlet side on visual sensory, make the equal homogeneous of show image be affected.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of novel light guide plate, attaches a blooming piece by the incidence surface in light guide plate and solves the problems referred to above.
For reaching above-mentioned purpose, the light guide plate that is used for side-light type module backlight that the utility model provides comprises a substrate and a blooming piece.This substrate has the side that an incidence surface is positioned at this substrate, and light is to enter this substrate by this incidence surface.This blooming piece is attached at this incidence surface, with so that this light diffusion and this light imported this substrate.
More particularly, this this blooming piece is a brightness enhancement film or a diffusion sheet, and wherein this diffusion sheet is the high briliancy diffusion sheet with water chestnut mirror or microlens structure.In addition, this blooming piece is to see through an optical cement to be attached at this incidence surface, and wherein this optical cement is an optics double sticky tape or a liquid optical cement.Shape that it should be noted that this blooming piece conforms to the shape of this incidence surface.
On the other hand, the utility model also provides a side-light type module backlight with this novel optic plate, and it comprises a backboard, a reflector plate, a glue frame, a light source and this light guide plate.This reflector plate is arranged on this backboard.This glue shaped as frame is formed in a side of this backboard.This light source is arranged in this glue frame, in order to emit beam.This light guide plate is arranged on this reflector plate, and it comprises this substrate and this blooming piece.Similarly, this substrate has the side that an incidence surface is positioned at this substrate, and this side is that the light that this light source sent is to enter this substrate by this incidence surface near this light source.This blooming piece is attached at this incidence surface, with so that this light diffusion and this light imported this substrate.Preferably, this light source is to comprise a plurality of light emitting diodes.
According to this novel preferred embodiment, the utility model sees through this incidence surface in this light guide plate and attaches a blooming piece and solve existing LED crystal particle and reduce, and LED crystal particle causes the seemingly shortcoming of the light and shade inequality of head lamp shape with incidence surface apart from shortening.
For above-mentioned and other purpose of the present utility model, feature, advantage and embodiment can be become apparent, hereinafter will enumerate embodiment and be illustrated, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 illustrates the schematic top plan view of the known LED of utilization as the side-light type module backlight of light source.
Fig. 2 illustrates the diagrammatic cross-section of the light guide plate part-structure of the utility model preferred embodiment.
Embodiment
Below describe conjunction with figs. the preferred embodiment of light guide plate of the present utility model in detail, wherein identical element numbers is that same or analogous assembly is shown in representative in difference is graphic.Please refer to Fig. 2, Fig. 2 is the diagrammatic cross-section of the light guide plate part-structure of the utility model preferred embodiment, wherein is to represent the light guide plate (Light Guide Plate) of this preferred embodiment of the utility model and represent the module backlight of the side-light type with this light guide plate 20 with element numbers 100 with element numbers 20.This side-light type module 100 backlight comprises a backboard 110, a reflector plate (Reflector) 120, a glue frame (Mold Frame) 130, one light source 150 and this light guide plate 20.These light source 150 preferable a plurality of light emitting diodes (LED) that comprise wherein, for example the LED lamp bar of arranging with red, green and blue (RGB) LED (Light Bar), perhaps the LED lamp bar of arranging with a plurality of white light LEDs.
In this preferred embodiment, this reflector plate 120 is arranged on this backboard 110, is used to be reflected in the light in this light guide plate 20.This glue frame 130 is formed at a side of this backboard 110, also can be used to reflect the light that this light source 150 is sent.Light source 150 is arranged in this glue frame 130, in order to emit beam.
This light guide plate 20 is arranged on this reflector plate 120.This light guide plate 20 has a substrate 21 and a blooming piece 24.The material of this substrate 21 is preferably the optical grade acryl, i.e. polymethylmethacrylate (PMMA), in order to side-light guides to liquid crystal panel (not shown).This substrate 21 has the side that an incidence surface 22 is positioned at this light guide plate 20, and this side is that the light that this light source 150 is sent is to enter this substrate 21 by this incidence surface 22 near this light source 150.
This blooming piece 24 is attached at this incidence surface 22, spreads also this light is imported this substrate 21 in order to the light that this light source 150 is sent.Particularly, this blooming piece 24 is that (Brightness Enhancement Film BEF), for example is a multi-functional rhombus lens to a brightness enhancement film.This multi-functional rhombus lens has the function with this light source diffusion and correcting (towards incidence surface) simultaneously.In addition, this brightness enhancement film also can be a lenticule diaphragm (Micro-Lens Film), the same function with diffusion and correcting (towards incidence surface).
Implement in the sample attitude at another, this blooming piece is a diffusion sheet (Diffuser), in order to this light source diffusion that those light emitting diodes 150 are sent.This diffusion sheet is to add many chemical particle as scattering particle in this diffusion sheet material, and light can be constantly when the diffusion sheet passing in the different medium of two refractive indexes, the phenomenon of many refractions, reflection and scattering will take place in light at the same time, has so just reached the effect of diffusion.In addition, this diffusion sheet is preferably a high briliancy diffusion sheet (High Gain Diffuser, HGD), this high briliancy diffusion sheet is to have water chestnut mirror or microlens structure on the diffusion sheet.Similarly, this high briliancy diffusion sheet has the function with this light source diffusion and correcting (towards incidence surface).
This blooming piece 24 is that (Optically Clear Adhesives, OCA) (not shown) is attached at this incidence surface 22 through an optical cement.For instance, this optical cement is an optics double sticky tape, and it has the function of this incidence surface 22 with these blooming piece 24 bondings and printing opacity.In addition, this optical cement also can be a liquid optical cement except being the solid-state optics double faced adhesive tape.It for example under UV-irradiation curable liquid photopolymer etc.
Shape that it should be noted that this blooming piece 24 conforms to the shape of this incidence surface 22.Specifically, the width of this blooming piece 24 is equal to the thickness of this light guide plate 20 of this thickness.Its production method can be this blooming piece 24 is cut into the thickness of this light guide plate 20 and sees through the incidence surface 22 that optical cement is pasted neat this light guide plate 20, stands in group on the reflector plate 120 of backboard 110.
According to this novel preferred embodiment, this incidence surface 22 that the utility model sees through in this light guide plate 20 attaches the travel angle of blooming piece 24 with management light, solve the light emitting diode number and reduce, and light emitting diode shortens the seemingly shortcoming of the light and shade inequality of head lamp shape that causes with incidence surface 20 distances.In addition, this blooming piece 24 also can import this substrate 21 with the light (shown in Fig. 2 dotted arrow) that originally form total reflection, reaches the utilization factor and the usefulness of preferable light.
Though the utility model with preferred embodiment openly as above, right its is not in order to limit the utility model, have in the technical field under the utility model and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore protection domain of the present utility model is as the criterion when looking aforesaid the claim person of defining.
Claims (17)
1. a light guide plate is characterized in that, is used for side-light type module backlight, and this light guide plate comprises:
One substrate has the side that an incidence surface is positioned at this substrate, and light is to enter this substrate by this incidence surface; And
One blooming piece is attached at this incidence surface, with so that this light diffusion and this light imported this substrate.
2. light guide plate as claimed in claim 1 is characterized in that, this blooming piece is a brightness enhancement film.
3. light guide plate as claimed in claim 1 is characterized in that, this blooming piece is a diffusion sheet.
4. light guide plate as claimed in claim 3 is characterized in that, this diffusion sheet is the high briliancy diffusion sheet with water chestnut mirror or microlens structure.
5. light guide plate as claimed in claim 1 is characterized in that, this blooming piece is to see through optical cement to be attached at this incidence surface.
6. light guide plate as claimed in claim 5 is characterized in that, this optical cement is the optics double sticky tape.
7. light guide plate as claimed in claim 5 is characterized in that, this optical cement is liquid optical cement.
8. light guide plate as claimed in claim 5 is characterized in that, the shape of this blooming piece conforms to the shape of this incidence surface.
9. a side-light type module backlight is characterized in that, comprising:
One backboard;
One reflector plate is arranged on this backboard;
One glue frame is formed at a side of this backboard;
One light source is arranged in this glue frame, in order to emit beam; And
One light guide plate is arranged on this reflector plate, and this light guide plate comprises:
One substrate has the side that an incidence surface is positioned at this substrate, and this side is that the light that this light source sent is to enter this substrate by this incidence surface near this light source; And
One blooming piece is attached at this incidence surface, with so that this light diffusion and this light imported this substrate.
10. side-light type as claimed in claim 9 module backlight is characterized in that this light source is to comprise a plurality of light emitting diodes.
11. side-light type as claimed in claim 9 module backlight is characterized in that, this blooming piece is a brightness enhancement film.
12. side-light type as claimed in claim 9 module backlight is characterized in that, this blooming piece is a diffusion sheet.
13. side-light type as claimed in claim 12 module backlight is characterized in that, this diffusion sheet is the high briliancy diffusion sheet with water chestnut mirror or microlens structure.
14. side-light type as claimed in claim 9 module backlight is characterized in that, this blooming piece is to see through an optical cement to be attached at this incidence surface.
15. side-light type as claimed in claim 14 module backlight is characterized in that, this optical cement is an optics double sticky tape.
16. side-light type as claimed in claim 14 module backlight is characterized in that, this optical cement is a liquid optical cement.
17. side-light type as claimed in claim 9 module backlight is characterized in that, the shape of this blooming piece conforms to the shape of this incidence surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200465246U CN202041675U (en) | 2011-02-24 | 2011-02-24 | Light guide plate and side light type backlight module with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200465246U CN202041675U (en) | 2011-02-24 | 2011-02-24 | Light guide plate and side light type backlight module with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041675U true CN202041675U (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200465246U Expired - Fee Related CN202041675U (en) | 2011-02-24 | 2011-02-24 | Light guide plate and side light type backlight module with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202041675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI574064B (en) * | 2015-08-14 | 2017-03-11 | Light guiding film, backlight module, and display device |
-
2011
- 2011-02-24 CN CN2011200465246U patent/CN202041675U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI574064B (en) * | 2015-08-14 | 2017-03-11 | Light guiding film, backlight module, and display device | |
| US10267971B2 (en) | 2015-08-14 | 2019-04-23 | Radiant Opto-Electronics (Suzhou) Co., Ltd. | Light guide film, backlight module and display device having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CPT TECHNOLOGY (GROUP) CO., LTD. Free format text: FORMER OWNER: CHINA PROJECTION TUBE CO., LTD. Effective date: 20130715 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130715 Address after: 215217, 555 East Road, Tongli District, Wujiang Economic Development Zone, Jiangsu, China Patentee after: CPTW (Wujiang) Co., Ltd. Patentee after: CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD. Address before: 215217, No. 88, Tung Hing Road, Tongli District, Wujiang Economic Development Zone, Suzhou, Jiangsu Patentee before: CPTW (Wujiang) Co., Ltd. Patentee before: Chunghwa Picture Tubes Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20170224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |