CN201196378Y - Mask with light guiding function and backlight module - Google Patents
Mask with light guiding function and backlight module Download PDFInfo
- Publication number
- CN201196378Y CN201196378Y CNU200820115324XU CN200820115324U CN201196378Y CN 201196378 Y CN201196378 Y CN 201196378Y CN U200820115324X U CNU200820115324X U CN U200820115324XU CN 200820115324 U CN200820115324 U CN 200820115324U CN 201196378 Y CN201196378 Y CN 201196378Y
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- light
- shade
- light guide
- incidence
- guide section
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Abstract
The utility model relates to a shade with light guide function and a backlight module. The backlight module comprises a light guide plate, a light source and a shade, wherein the light source is arranged beside the light incidence surface of the light guide plate; the shade encloses the light source and is provided with an opening; the shade comprises a light incidence part and a light guide part which are made of transparent materials; the side of the light incidence part close to the light source is provided with an incidence surface while the side of the light incidence part far from the light source is provided with a first reflecting cambered surface; the light guide part is connected with the side end of the light incidence part; and the side surface of the light guide part is a reflecting surface and the top of the light guide part is provided with a light leaving surface, wherein the first reflecting cambered surface reflects the incidence light to the light guide part, and the light guide part guides the light to the light leaving surface.
Description
Technical field
The utility model relates to a kind of shade and backlight module, particularly be a kind of shade and the backlight module that uses this shade of tool light-guiding function.
Background technology
In recent years, traditional cathode-ray tube display (CRT monitor that promptly is commonly called as) is replaced by LCD gradually, main cause is that the amount of radiation that LCD discharges is far smaller than CRT monitor, and LCD also reduces significantly in this manufacturing cost in several years.At present, LCD required light source when showing mainly is to be provided by backlight module.On the market, backlight module can be divided into two kinds of straight-down negative and side incident types.
Please refer to Fig. 1, Fig. 1 is existing side incident type backlight module.This backlight module 100 comprises: a reflector 110, a lamp source 120, a reflector plate 130, a LGP 140 and multi-disc blooming 150.Wherein, lamp source 120 is arranged on LGP 140 other and 110 encirclements of cover that are reflected, and 130 of reflector plates are arranged on LGP 140 belows, and blooming 150 then is arranged on LGP 140 tops.
Because the bottom of LGP 140 is coated with a plurality of Christmas tree patterns (not illustrating), so the light I that sent of lamp source 120
11After injecting LGP 140, can be reflected, make light I by Christmas tree pattern
11Direction incident towards blooming 150.Blooming 150 comprises a diffusion barrier 151 and a brightness enhancement film 152, and diffusion barrier 151 can make light more even diffusely, and 152 of brightness enhancement film are that the light that is used for having spread reassociates, to increase brightness.
In addition, reflect and be incident upon again the LGP 140 from the light that the bottom spilt of LGP 140 sheet 130 that then can be reflected.In addition, the function of reflector 110 is that the light that allows lamp source 120 be sent can penetrate towards the direction of LGP 140.Therefore, reflector 110 can allow the utilization ratio of light improve with reflector plate 130.
Yet cover 110 light that reflected that are reflected might not all can be incident upon in the LGP 140.For example, please continue with reference to Fig. 1 light I
12Be reflected and inject lamp source 120 after cover 110 reflects, and absorbed by lamp source 120.So, the light that lamp source 120 is sent has part just can't be utilized, thereby causes waste.
Therefore, the light that the lamp source is sent is used effectively, and being is worth those skilled in the art to be worthy of consideration ground.
Summary of the invention
Main purpose of the present utility model provides a kind of shade and the backlight module that uses this shade of tool light-guiding function, and its light that lamp source is sent is used effectively.
In order to reach above-mentioned purpose and other purposes, the utility model provides a kind of shade of tool light-guiding function, and this shade has an opening, and it comprises a light in part and a light guide section, and this light in part and light guide section all are made of transparent material.Side near the lamp source in light in part has a plane of incidence, and the side away from the lamp source in light in part has one first reflection cambered surface.Light guide section is connected in the side of light in part, and the side of this light guide section is a reflecting surface, and the top of light guide section has an exiting surface.Wherein, the first reflection cambered surface can reflex to light guide section with the light of incident, and this light guide section exports to exiting surface with light again.
In the above-mentioned shade with light-guiding function, the plane of incidence is a cambered surface, and the center of curvature in the center of curvature of this cambered surface and lamp source coincides.
In the above-mentioned shade with light-guiding function, the plane of incidence is provided with an anti-reflecting layer.
In above-mentioned shade with light-guiding function, above or below the lamp source, locate, be provided with one second reflection cambered surface, this second reflection cambered surface can reflex to the light of incident the opening of shade.
In order to reach above-mentioned purpose and other purposes, the utility model provides a kind of backlight module, and this backlight module comprises a LGP, a lamp source and a shade.Above-mentioned lamp source is arranged on the incidence surface side of LGP and the cover that is reflected surrounds, and shade then is around this lamp source.This shade comprises a light in part and a light guide section, and this light in part and light guide section are made of transparent material.Side near the lamp source in light in part has a plane of incidence, and the side away from the lamp source in the light in part then has one first reflection cambered surface.This light guide section is connected in the side of light in part, and the side of light guide section is reflecting surface, and the top of light guide section has an exiting surface.Wherein, the first reflection cambered surface can reflex to light guide section with the light of incident, and this light guide section exports to exiting surface with light again.
Because shade of the present utility model has light-guiding function, so by the emitted light I in rear, lamp source
22Can be directed to LGP by the light guide section of shade.In addition, the light that is sent above or below the lamp source also can be reflexed to the LGP by the second reflection cambered surface.On the contrary, in existing backlight module, by rear, lamp source, above or below emitted light, exhausted major part is reflected and can be incident upon the lamp source after the cover reflection and be absorbed.
The beneficial effects of the utility model are: the light that this device can make the lamp source be sent is used effectively, and has reduced energy loss, has avoided waste.
Description of drawings
Fig. 1 is the existing side incident type of a utility model backlight module;
Fig. 2 is the schematic diagram of the backlight module of the utility model first embodiment;
Fig. 3 is the part enlarged drawing of the backlight module of the utility model first embodiment;
Fig. 4 is the schematic diagram of the shade of the utility model second embodiment;
Fig. 5 is the schematic diagram of the shade of the utility model the 3rd embodiment.
Symbol figure mark explanation: 100-backlight module; The 110-reflector; 120-lamp source; The 130-reflector plate; The 140-LGP; The 150-blooming; The 151-diffusion barrier; The 152-brightness enhancement film; I
11, I
12-light; 200: backlight module; 210,210 ', 210 ' '-shade; 2101,2101 '-plane of incidence; The 2102-first reflection cambered surface; The 2103-second reflection cambered surface; 2104-reflects material; 2105-microstructure body; The 211-light in part; The 212-light guide section; The 2121-exiting surface; 2122: reflecting surface; The 213-opening; 220-lamp source; The 230-reflector plate; The 240-LGP; The 241-incidence surface; The 250-blooming; The 260-reflection sheet; The C-center of curvature; I
21, I
22, I
23-light.
The specific embodiment
Below in conjunction with accompanying drawing, to this novel above-mentionedly is described in more detail with other technical characterictic and advantage.
Please earlier with reference to Fig. 2, Fig. 2 is the schematic diagram of the backlight module of first embodiment of the present utility model.This backlight module 200 comprises: a shade 210, a lamp source 220, a reflector plate 230, a LGP 240 and multi-disc blooming 250.Wherein, lamp source 220 is arranged on incidence surface 241 other and 210 encirclements of cover that are reflected of LGP 240, and 230 of reflector plates are arranged on LGP 240 belows, and blooming 250 then is arranged on LGP 240 tops.In the present embodiment, the function of reflector plate 230, LGP 240 and blooming 250 respectively with Fig. 1 in reflector plate 130, LGP 140 identical with blooming 150, therefore do not describing in detail.
Please be simultaneously with reference to Fig. 2 and Fig. 3, the do part enlarged drawing of backlight module of the utility model embodiment of Fig. 3.Shade 210 comprises a light in part 211 and a light guide section 212, light in part 211 is made of transparent material with light guide section 212, this transparent material can be identical with the main composition material of LGP, for example can be polymethyl methacrylate (Polymethyl methacrylate, abbreviate PMMA as) or polystyrene (PolyStyrene abbreviates PS as).Be formed with an opening 213 in the place ahead of shade 210, this opening 213 can be for the light I that is penetrated by 220 the place aheads, lamp source
21Be incident in the LGP 240.Side near lamp source 220 in the light in part 211 of shade 210 has a plane of incidence 2101, and the side away from lamp source 220 has one first reflection cambered surface 2102 in light in part 211.In the present embodiment, the plane of incidence 2101 is an arc surface, this arc surface and lamp source 220 shared identical center of curvature C.In addition, the first reflection cambered surface 2102 can be formed by the reflection sheet 260 that attaches away from the side in lamp source 220 in light in part 211, and the material of this reflection sheet 260 can be metal.Also can form the first reflection cambered surface 2102 by being coated with metal level.
Please continue with reference to Fig. 3 the light I that injects from the plane of incidence 2101
22After cambered surface 2102 reflects by first reflection, light I
22Can be incident upon in the light guide section 212; Then, light I
22Can be reflected by the reflecting surface 2122 of light guide section 212, and penetrate and enter the LGP 240 from exiting surface 2121.In addition, in shade 210, locate corresponding to the summary top in lamp source 220 or slightly, be provided with one second reflection cambered surface 2103, this second reflection cambered surface 2103 can be with the light I that sends from 220 tops, lamp source
23Or the light (not illustrating) that sends from 220 belows, lamp source reflexes to the LGP 240.
From the above, because shade 210 of the present utility model has light-guiding function, therefore by the emitted light I in 220 rears, lamp source
22Can be directed to LGP 240 by the light guide section 212 of shade 210.In addition, the light that is sent above or below lamp source 220 also can be reflexed to the LGP 240 by the second reflection cambered surface.On the contrary, in existing backlight module 100 (as shown in Figure 1), by 120 rears, lamp source, above or below emitted light, exhausted major part is reflected and can be incident upon lamp source 120 after cover 110 reflections and be absorbed.Therefore, compare, shade 210 of the present utility model can improve the utilization ratio of light.
Then, please refer to Fig. 4, Fig. 4 is the schematic diagram of the shade of second embodiment of the present utility model.In the shade 210 ' of second embodiment, its plane of incidence 2101 can be coated with antireflection material 2104, and the phenomenon that this antireflection material 2104 can make the light that is incident upon the plane of incidence 2101 produce total reflection reduces more.Come, please refer to Fig. 5, Fig. 5 is the schematic diagram of the shade of the 3rd embodiment of the present utility model.Shade 210 ' at second embodiment ' in, its plane of incidence 2101 ' is provided with a plurality of microstructure bodies 2105, and the phenomenon that this microstructure body 2105 can make the light that is incident upon the plane of incidence 2101 ' produce total reflection reduces more.No matter be that the plane of incidence 2101 coating antireflection materials 2104 or the plane of incidence 2101 ' are provided with the specular microstructure body 2105 of a plurality of water chestnuts, the phenomenon that all can reduce total reflection takes place, and therefore more increases the utilization ratio of light.In the present embodiment, microstructure body 2105 to be shaped as water chestnut specular, but this area person skilled also can become its shaped design other shapes such as hemispherical or lens shaped according to situation.
In the above-described embodiment, the shape major part of the plane of incidence of shade is circular arc, and She Ji reason is to make the light that is incident upon the plane of incidence to be difficult for producing the phenomenon of total reflection like this.Yet this area person skilled also can be according to the shape that the plane of incidence of shade need be designed to other.
More than explanation is novel just illustrative for this; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited; can make many modifications; change, or equivalence, but all will fall in the protection domain of the present utility model.
Claims (10)
1. shade with light-guiding function, described shade is around a lamp source and have an opening, and it is characterized in that: it comprises:
One light in part is made by transparent material, has a plane of incidence at described light in part near the side in described lamp source, and described light in part has one first reflection cambered surface away from the side in described lamp source; And
One light guide section, make by transparent material, described light guide section is connected in the side of described light in part, the described first reflection cambered surface reflexes to described light guide section with the light of incident, the side of described light guide section is a reflecting surface, and the top of described light guide section has an exiting surface, and described light guide section exports to described exiting surface with described light again.
2. the shade with light-guiding function according to claim 1 is characterized in that: the described plane of incidence is a cambered surface, and the center of curvature in the center of curvature of described cambered surface and described lamp source coincides.
3. the shade with light-guiding function according to claim 1 is characterized in that: the described plane of incidence is provided with an anti-reflecting layer.
4. the shade with light-guiding function according to claim 1, it is characterized in that: also comprise: one second reflection cambered surface, and the described second reflex arc face correspondence is arranged at the place, above and below in described lamp source, and the described second reflection cambered surface can reflex to the light of incident the opening of described shade.
5. the shade with light-guiding function according to claim 1 is characterized in that: the described plane of incidence is provided with a plurality of microstructure bodies.
6. backlight module, it is characterized in that: it comprises:
One LGP;
One lamp source is arranged on by the incidence surface of described LGP; And
One shade, round described lamp source, described shade has an opening, and described shade comprises a light in part and a light guide section, and described light in part and described light guide section are made of transparent material; Side near described lamp source in described light in part has a plane of incidence, and described light in part has one first reflection cambered surface away from the side in described lamp source, the described first reflection cambered surface reflexes to described light guide section with the light of incident, described light guide section is connected in the side of described light in part, and the side of described light guide section is a reflecting surface, and the top of described light guide section has an exiting surface, and described light guide section exports to described exiting surface with described light again.
7. backlight module according to claim 6 is characterized in that: the described plane of incidence is a cambered surface, and the center of curvature in the center of curvature of described cambered surface and described lamp source coincides.
8. backlight module according to claim 6 is characterized in that: the described plane of incidence is provided with an anti-reflecting layer.
9. backlight module according to claim 6, it is characterized in that: in described shade, corresponding to place, the above and below in described lamp source, be provided with one second reflection cambered surface, the described second reflection cambered surface reflexes to the opening of described shade with the light of incident and is incident in the described LGP.
10. backlight module according to claim 6 is characterized in that: the described plane of incidence is provided with a plurality of microstructure bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820115324XU CN201196378Y (en) | 2008-05-19 | 2008-05-19 | Mask with light guiding function and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820115324XU CN201196378Y (en) | 2008-05-19 | 2008-05-19 | Mask with light guiding function and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196378Y true CN201196378Y (en) | 2009-02-18 |
Family
ID=40416015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820115324XU Expired - Fee Related CN201196378Y (en) | 2008-05-19 | 2008-05-19 | Mask with light guiding function and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201196378Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162195A (en) * | 2011-12-12 | 2013-06-19 | Lg伊诺特有限公司 | Illumination unit and display apparatus using the same |
-
2008
- 2008-05-19 CN CNU200820115324XU patent/CN201196378Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162195A (en) * | 2011-12-12 | 2013-06-19 | Lg伊诺特有限公司 | Illumination unit and display apparatus using the same |
| US9297513B2 (en) | 2011-12-12 | 2016-03-29 | Lg Innotek Co., Ltd. | Display apparatus having illumination unit with specific bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090218 Termination date: 20110519 |