CN201310821Y - Light-guiding plate and backlight module - Google Patents
Light-guiding plate and backlight module Download PDFInfo
- Publication number
- CN201310821Y CN201310821Y CNU2008201752763U CN200820175276U CN201310821Y CN 201310821 Y CN201310821 Y CN 201310821Y CN U2008201752763 U CNU2008201752763 U CN U2008201752763U CN 200820175276 U CN200820175276 U CN 200820175276U CN 201310821 Y CN201310821 Y CN 201310821Y
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- light
- lgp
- incidence surface
- backlight module
- light source
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Abstract
The utility model provides a light-guiding plate and a backlight module. The backlight module comprises the light-guiding plate, at least a light source and at least a reflecting cover; a light incidence surface is arranged on the side edge of the light-guiding plate; the light incidence surface is an inclined plane, wherein, both the light source and the reflecting cover are arranged beside the light incidence surface; and the reflecting cover is arranged around the light source. In addition, a center of the light source is positioned on a mid vertical plane of the light incidence surface; and the light source, for instance, can be a cold cathode fluorescence tube or an LED. The light-guiding plate has greater light extraction amount.
Description
Technical field
The utility model relates to a kind of Light guiding plate and backlight module, relates in particular to a kind of LGP and the backlight module that uses described LGP with big amount of light.
Background technology
In these years, along with the fast development of the technology of LCD, and its radiation emitted amount is much smaller than traditional CRT monitor, so LCD has now become the main flow of monitor market.Backlight module is one of key part and component of panel of LCD, because liquid crystal itself is not luminous, the function of backlight module promptly is well-off brightness and the light source that is evenly distributed, and makes its normally show image.Generally speaking, backlight module can be divided into side incident type and two kinds of straight incident types down, and side incident type backlight module is mainly used in undersized LCD, the LCD of using as desktop computer or notebook computer.The main member of side incident type backlight module is LGP and fluorescent tube, and wherein fluorescent tube is the side that is positioned over LGP.
Please refer to Fig. 1, Fig. 1 illustrate is existing side incident type backlight module schematic diagram.This side incident type backlight module 100 comprises: two reflectors 110, two fluorescent tubes 120, a reflector plate 130, a LGP 140 and multi-disc blooming 150.Wherein, described two fluorescent tubes 120 are arranged at described LGP 140 both sides respectively and are coated by described reflector 110, and described reflector plate 130 is arranged on described LGP 140 belows, and described blooming 150 is arranged on described LGP 140 tops.Described LGP 140 has two incidence surfaces 141 and an exiting surface 142, and wherein incidence surface 141 is vertical each other with exiting surface 142.
Some can directly be incident upon incidence surface 141 light that fluorescent tube 120 is sent, and the light of other parts can be reflected and be incident upon incidence surface 141 again after cover 110 reflects.The coated on bottom side of LGP 140 is furnished with a plurality of Christmas tree patterns (not illustrating), so the light that sent of fluorescent tube 120 can reflect by Christmas tree pattern after injecting LGP 140, and makes the direction incident of light towards blooming 150.
Because present LCD is more and more stressed frivolous moulding, so the thickness of LGP 140 is also more and more thin.If LGP 140 is thinner, the area of incidence surface 141 is just little, and the amount that directly is incident upon incidence surface 141 in the light that fluorescent tube 120 is sent is also just little, and be incident upon the amount of incidence surface 141 via reflector 110 bigger.Yet after light was reflected and covers 110 reflections, the energy of part can be reflected and cover 110 absorptions.So, the light quantity of going into that is incident to incidence surface 141 is just more lacked, and the amount of light of the exiting surface 142 of LGP 140 is also just low.
Therefore, can also keep certain amount of light when how to make the thickness attenuation of LGP, be worth this area to have and knows that usually the knowledgeable goes to consider.
Summary of the invention
The utility model main purpose provides a kind of LGP and the backlight module that uses described LGP, and described LGP has bigger amount of light.
In order to reach above-mentioned purpose and other purposes, the utility model provides a kind of backlight module, and it comprises: a LGP, at least one light source and at least one reflector.The side of described LGP has at least one incidence surface, and described incidence surface is an inclined plane.Wherein, described light source and described reflector all are arranged at by the described incidence surface, and described reflector is round light source.In addition, the central point of described light source for example is to be positioned on the middle vertical plane of described incidence surface.
In above-mentioned backlight module, described light source is cathode fluorescent tube or light emitting diode.
In above-mentioned backlight module, also comprise a diffusion barrier, described diffusion barrier is positioned at the LGP top.
In above-mentioned backlight module, also comprise a brightness enhancement film, described brightness enhancement film is positioned at the top of diffusion barrier.
In above-mentioned backlight module, the number of described incidence surface is two, lays respectively at the relative both sides of LGP.
In above-mentioned backlight module, also comprise a reflector plate, described reflector plate is arranged at the below of described LGP.
In order to reach above-mentioned purpose and other purposes, the utility model provides a kind of LGP, and its side has at least one incidence surface, and described incidence surface is an inclined plane.
Compared with prior art, because LGP of the present utility model has the incidence surface of inclination, it is big area that incidence surface has more existing LGP.Therefore, compared to existing LGP, the amount that directly is incident upon incidence surface in the light that light source sent is bigger, and it is less to be incident upon the amount of incidence surface again via reflector reflection.Also therefore, compared to existing LGP, the exiting surface of leaded light of the present utility model has bigger amount of light.
For making those of ordinary skills understand the purpose of this utility model, feature and effect, by following specific embodiment, and cooperate appended graphic, to the utility model illustrate in detail as after.
Description of drawings
Fig. 1 illustrate is existing side incident type backlight module schematic diagram;
Fig. 2 illustrate is the backlight module schematic diagram of first embodiment of the present utility model;
Fig. 3 illustrate is the backlight module schematic diagram of second embodiment of the present utility model;
Fig. 4 illustrate is the backlight module schematic diagram of the 3rd embodiment of the present utility model.
Description of reference numerals: prior art: 100-backlight module; The 110-reflector; The 120-fluorescent tube; The 130-reflector plate; The 140-LGP; The 141-incidence surface; The 142-exiting surface; The 150-blooming; The utility model: 200,300-backlight module; 210,310-reflector; 220,320-light source; The 322-printed circuit board (PCB); 230,330-reflector plate; 240,340-LGP; 241,341-incidence surface; The 241a-middle vertical plane; The 242-exiting surface; The 343-bottom surface; 250,350-blooming; 251,351-diffusion barrier; 252,352-brightness enhancement film; θ-angle.
The specific embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the utility model is above-mentioned.
Please earlier with reference to Fig. 2, Fig. 2 illustrate is the backlight module schematic diagram of first embodiment of the present utility model.This backlight module 200 comprises: two reflectors 210, two light sources 220, a reflector plate 230, a LGP 240 and multi-disc blooming 250.Wherein, two above-mentioned light sources 220 are arranged at described LGP 240 both sides respectively and are coated by described reflector 210, and described reflector plate 230 is arranged on described LGP 240 belows, and described blooming 250 is arranged on described LGP 240 tops.Described LGP 240 has two incidence surfaces 241 and an exiting surface 242, and wherein said incidence surface 241 is an inclined plane, and 242 of described incidence surface 241 and described exiting surfaces have an angle theta.Wherein, the light that described light source 220 is sent, some can directly be incident upon incidence surface 241, and the light of other parts can be reflected and be incident upon incidence surface 241 again after cover 210 reflects
The bottom of described LGP 240 is coated with a plurality of Christmas tree patterns (not illustrating), so the light that sent of light source 220 can reflect by Christmas tree pattern after injecting LGP 240, and light is penetrated towards the direction of exiting surface 242.Blooming 250 comprises a diffusion barrier 251 and a brightness enhancement film 252, and diffusion barrier 251 can make light more even diffusely, and brightness enhancement film 252 to be the light that is used for having spread reassociate, to increase brightness.In addition, reflect and be incident upon again the LGP 240 from the light that the bottom spilt of LGP 240 sheet 230 that can be reflected.In addition, the function of reflector 210 is that the light that allows light source 220 be sent can penetrate towards the direction of LGP 240.
Please comparison diagram 1 and Fig. 2, because incidence surface 241 is the inclined plane, so the area of the incidence surface 241 of LGP 240 can be greater than the area of the incidence surface 141 of LGP 140.Therefore, compared to LGP 140, the amount that directly is incident upon incidence surface 241 in the light that light source 220 is sent is bigger, and it is less to be incident upon the amount of incidence surface 241 again via reflector 210 reflection.Also therefore, compared to the exiting surface 142 of LGP 140, the exiting surface 242 of LGP 240 has bigger amount of light.According to analog result, if angle theta is that the amount of light of exiting surface 242 is about the twice of the amount of light of exiting surface 142 under all identical situation of 30 degree and other condition.
This area has knows that usually the knowledgeable can adjust above-mentioned angle theta according to situation, if angle theta is littler, the area of incidence surface 241 is just bigger, and the amount of light of exiting surface 242 is also just big.In addition, the central point of above-mentioned light source 220 is to be positioned on the middle vertical plane 241a of incidence surface 241, but this area has and knows that usually the knowledgeable also can adjust the position of light source 220 according to situation.
In addition, above-mentioned light source 220 is cathode fluorescent tube (Cold Cathode Fluorescent Lamp), but this area has and knows that usually the knowledgeable also can be replaced as it light emitting diode (Light Emitting Diode).Please refer to Fig. 3, Fig. 3 illustrate is the backlight module schematic diagram of second embodiment of the present utility model.In Fig. 3, will be marked with identical symbol with the first embodiment components identical and repeat no more.In the present embodiment, light source 320 is light emitting diode and is welded on the printed circuit board (PCB) 322.
In the above-described embodiment, incidence surface 241 is the both sides that are arranged at LGP 240, but this area have know usually the knowledgeable also can be only therein a side incidence surface is set.Please refer to Fig. 4, Fig. 4 illustrate is the backlight module schematic diagram of the 3rd embodiment of the present utility model.This backlight module 300 comprises: a reflector 310, a light source 320, a reflector plate 330, a LGP 340 and multi-disc blooming 350, blooming 350 comprises a diffusion barrier 351 and a brightness enhancement film 352.Wherein, the inclined plane of bottom surface 343 for tilting left of LGP 340 from the bottom right, reflector plate 330 is arranged on the below of bottom surface 343.Incidence surface 341 only is arranged at a wherein side of LGP 340, and reflector 310 is arranged on incidence surface 341 sides with light source 320.
In sum because LGP of the present utility model has the incidence surface of inclination, so incidence surface to have more existing LGP be big area.Therefore, compared to existing LGP, the amount that directly is incident upon incidence surface in the light that light source sent is bigger, and it is less to be incident upon the amount of incidence surface again via reflector reflection.Also therefore, compared to existing LGP, the exiting surface of leaded light of the present utility model has bigger amount of light.
More than explanation is just illustrative for the utility model; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all will fall in the protection domain of the present utility model.
Claims (10)
1. backlight module is characterized in that it comprises:
One LGP, its side has at least one incidence surface, and described incidence surface is an inclined plane;
At least one light source is arranged at by the described incidence surface; And
At least one reflector is arranged at described incidence surface side and centers on described light source.
2. backlight module as claimed in claim 1 is characterized in that the central point of described light source is positioned on the middle vertical plane of described incidence surface.
3. backlight module as claimed in claim 1 is characterized in that, described light source is a cathode fluorescent tube.
4. backlight module as claimed in claim 1 or 2 is characterized in that, described light source is a light emitting diode.
5. backlight module as claimed in claim 1 or 2 is characterized in that it also comprises a diffusion barrier, and described diffusion barrier is positioned at described LGP top.
6. backlight module as claimed in claim 5 is characterized in that it also comprises a brightness enhancement film, and described brightness enhancement film is positioned at the top of described diffusion barrier.
7. backlight module as claimed in claim 1 or 2 is characterized in that the number of described incidence surface is two, lays respectively at the relative both sides of described LGP.
8. backlight module as claimed in claim 1 or 2 is characterized in that it also comprises a reflector plate, and described reflector plate is arranged at the below of described LGP.
9. a LGP, its side has at least one incidence surface, it is characterized in that, and described incidence surface is an inclined plane.
10. LGP as claimed in claim 9 is characterized in that the number of described incidence surface is two, lays respectively at the relative both sides of described LGP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201752763U CN201310821Y (en) | 2008-11-17 | 2008-11-17 | Light-guiding plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201752763U CN201310821Y (en) | 2008-11-17 | 2008-11-17 | Light-guiding plate and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201310821Y true CN201310821Y (en) | 2009-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201752763U Expired - Fee Related CN201310821Y (en) | 2008-11-17 | 2008-11-17 | Light-guiding plate and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201310821Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720990A (en) * | 2012-05-25 | 2012-10-10 | 彩虹集团公司 | Lateral type light-emitting diode (LED) backlight module with glass light guide plate |
| WO2013149412A1 (en) * | 2012-04-01 | 2013-10-10 | 深圳市华星光电技术有限公司 | Narrow edge frame backlight module |
| CN104534307A (en) * | 2014-12-04 | 2015-04-22 | 江门市侨都和诚照明有限公司 | LED panel lamp with high luminous efficiency |
| CN111650684A (en) * | 2019-03-04 | 2020-09-11 | 光耀科技股份有限公司 | Light guide plate |
-
2008
- 2008-11-17 CN CNU2008201752763U patent/CN201310821Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013149412A1 (en) * | 2012-04-01 | 2013-10-10 | 深圳市华星光电技术有限公司 | Narrow edge frame backlight module |
| CN102720990A (en) * | 2012-05-25 | 2012-10-10 | 彩虹集团公司 | Lateral type light-emitting diode (LED) backlight module with glass light guide plate |
| CN104534307A (en) * | 2014-12-04 | 2015-04-22 | 江门市侨都和诚照明有限公司 | LED panel lamp with high luminous efficiency |
| CN111650684A (en) * | 2019-03-04 | 2020-09-11 | 光耀科技股份有限公司 | Light guide plate |
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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: 20090916 Termination date: 20121117 |