CN100385273C - Liquid crystal display device, back light modular and light guide structure - Google Patents
Liquid crystal display device, back light modular and light guide structure Download PDFInfo
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- CN100385273C CN100385273C CNB2006101633312A CN200610163331A CN100385273C CN 100385273 C CN100385273 C CN 100385273C CN B2006101633312 A CNB2006101633312 A CN B2006101633312A CN 200610163331 A CN200610163331 A CN 200610163331A CN 100385273 C CN100385273 C CN 100385273C
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- groove
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- lcd
- light guide
- backlight module
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Abstract
The invention supplies a LCD and its aphototropism module and light conducting structure which comprises the light conducting plate, the diffusing element and the grid point. Said light conducting plate includes: the body of plate which in mounted on the first chase of one side of the plate; the second chase which is mounted on the bottom of the first chase and the side of the plate. So the diffusing element is mounted on the upper side of the first chase, many grid points are set on the first chase. At least one brightening sheet can be mounted between the diffusing plate and the LCD panel to improve the availability ratio of the light further.
Description
Technical field
The present invention is about a kind of display, particularly a kind of LCD, its backlight module and light guide structure thereof (liquid crystal display, backlight module thereof and light guide structurethereof).
Background technology
LCD generally has a display panels, with display image.Yet, because the liquid crystal itself in the display panels is not had a characteristics of luminescence, therefore need: backlight module, required light so that the display panels display image to be provided by a planar light source device, for example.Display panels is made up of a plurality of liquid crystal, and each liquid crystal has same requirement to obtaining of light, thus backlight module need provide briliancy fully and the face light that is evenly distributed to display panels.
With reference to Figure 1A, Figure 1B, existing backlight module 100 comprises light source 120 and light guide plate 110.The transmission direction of the light that the incidence surface setting of light source 120 relative light guide plate 110, light guide plate 110 are launched from light source 120 in order to guiding, and then convert pointolite or line source to area source.Because after light enters light guide plate 110, must make light carry out mixed light earlier, converting pointolite or line source to area source, so the outer peripheral areas of exiting surface 112 just becomes the mixed light district, and relatively reduce the area of exiting surface 112, and then make the display size of liquid crystal display restricted greatly.Moreover, when light is incident to optically denser medium (that is, light guide plate) by optically thinner medium (that is, air), have Fei Sinei (Fresnel) reflection in incidence surface, and cause reflection loss, and along with incident angle becomes big, volume reflection can be healed greatly.
With reference to figure Fig. 2, it is fluted 114 that another existing backlight module 100, its incidence surface in light guide plate 110 design, and light source 120 then correspondence groove 114 and is provided with.This groove 114 provides with the mixed light district as light, to increase the area of exiting surface 112.And light is entered in the light guide plate 110 by groove 114, thereby has relatively reduced the incident angle of light, and then reduces Fei Sinei (Fresnel) loss of interface.
Yet the light source that is applied to backlight module at present can penetrate the light except light-emitting area, and its side also has light leak and produces.Existing backlight module is only considered effective utilization of the light that light-emitting area is emitted mostly, and the utilization of considering lateral emitting is not arranged.
Summary of the invention
In view of above problem, fundamental purpose of the present invention is to provide a kind of LCD, its backlight module and light guide structure thereof, to solve the problem that disclosed reflection loss of prior art and lateral emitting utilize.
For reaching above-mentioned purpose, the disclosed light guide structure of the present invention includes light guide plate, diffusion part and site.Light guide plate includes plate body, at least one first groove and at least one second groove.
First groove is positioned at a side of plate body.Second groove lays respectively at first bottom portion of groove, and is positioned at the bottom of the side of plate body.The diffusion part lays respectively at first groove top, and is provided with a plurality of sites in its surface.
In addition, in first groove of light guide structure, can be provided with light sources, so that light to be provided.
In this, the plate body of diffusion part and light guide plate can be integrated design, or identical material is made.Moreover this diffusion part also can be and sticks together film, to be attached at the upper surface of light sources.
The site can only be arranged at the upper surface of diffusion part, also can setting all be arranged upper and lower surface.And upper and lower lip-deep site can be crisscross arranged.Wherein, the setting of site can be done the density adjustment according to light sources, to reach the preferable effect that alleviates bright dark skewness.
At this, that the bottom of second groove can be designed to be haply is circular-arc, rectangular or be various geometric configuratioies such as trapezoidal haply haply.The size of the opening surface of second groove is corresponding to the size of the light-emitting area of its pairing light sources.The degree of depth of second groove then can be according to the thickness of the kind of light sources and/or plate body and is adjusted, so that the preferable coupling efficiency between light sources and light guide plate to be provided.
The disclosed LCD of the present invention includes reflector plate, light guide plate, light sources, diffusion part, site, diffuser plate and liquid crystal panel.
Light guide plate includes plate body, at least one first groove and at least one second groove.First groove is positioned at a side of plate body.Second groove lays respectively at first bottom portion of groove, and is positioned at the bottom of the side of plate body.The diffusion part lays respectively at first groove top, and is provided with a plurality of sites in its surface.
Light guide plate is arranged at the reflector plate top.Light sources lays respectively in first groove, and its light-emitting area corresponds respectively to the opening of second groove.The diffusion part is positioned at the top of first groove, and its surface is provided with a plurality of sites.Diffuser plate is positioned at light guide plate and diffusion part top.Liquid crystal panel then is positioned at the diffuser plate top.
Moreover, between diffuser plate and the liquid crystal panel at least one blast sheet can be set again, with the utilization factor of further lifting light.
Description of drawings
Figure 1A is the vertical view of existing backlight module;
Figure 1B is the side view of the backlight module of Figure 1A;
Fig. 2 is the sectional view of another existing backlight module;
Fig. 3 is the schematic perspective view of LCD according to an embodiment of the invention;
Fig. 4 is the sectional perspective synoptic diagram according to the backlight module of first embodiment of the invention;
Fig. 5 is the three-dimensional exploded view of the backlight module of Fig. 4;
Fig. 6 A is for being pursuant to the sectional view of the backlight module of an embodiment of I-I ' hatching line among Fig. 4;
Fig. 6 B is for being pursuant to the sectional view of the backlight module of another embodiment of I-I ' hatching line among Fig. 4;
Fig. 7 is the light guide structure schematic perspective view according to first embodiment of the invention;
Fig. 8 is the partial section according to the backlight module of second embodiment of the invention;
Fig. 9 is the partial section according to the backlight module of third embodiment of the invention;
Figure 10 is the schematic perspective view according to the light sources of first embodiment of the invention;
Figure 11 A is the enlarged drawing according to second slot opening of the light guide structure of first embodiment of the invention;
Figure 11 B is the enlarged drawing according to second slot opening of the light guide structure of second embodiment of the invention;
Figure 11 C is the enlarged drawing according to second slot opening of the light guide structure of third embodiment of the invention;
Figure 12 is the schematic perspective view of LCD according to another embodiment of the present invention.
The primary clustering symbol description
100: backlight module
110: light guide plate
112: exiting surface
114: groove
120: light source
200: backlight module
210: light guide plate
212: plate body
214: the first grooves
216: the second grooves
220: light sources
230: the diffusion part
240: the site
250: reflector plate
260: diffuser plate
270: the blast sheet
300: liquid crystal panel
D1: long
D2: wide
L1: long
L2: wide
A1: minor axis
A2: major axis
Embodiment
About feature of the present invention and enforcement, conjunction with figs. is described in detail as follows as most preferred embodiment.
Below enumerate specific embodiment describing content of the present invention in detail, and with accompanying drawing as aid illustration.The symbol of mentioning in the explanation is with reference to reference numeral.
With reference to Fig. 3, Fig. 3 is according to LCD of the present invention, comprising: backlight module 200 and display panels 300.
Refer again to Fig. 3, Fig. 4, Fig. 5, backlight module 200 includes light guide structure, light sources 220, reflector plate 250 and diffuser plate 260.
Light guide structure includes light guide plate 210 and diffusion part 230.Light guide structure is between reflector plate 250 and diffuser plate 260, and light sources 220 is between light guide structure and reflector plate 250.
Wherein, the degree of depth of second groove 216 can be according to the thickness of the kind of light sources 220 and/or plate body 212 and is adjusted, so that the preferable coupling efficiency of 210 of light sources 220 and light guide plate to be provided.
260 of diffuser plates are arranged at light guide plate 210 and the top of spreading part 230.
Wherein, the surface of diffusion part 230 is provided with a plurality of sites 240 (shown in Fig. 6 A, Fig. 6 B), to change the direct of travel of light, utilizes the light leak of light sources 220 side direction with assistance, and utilizes the light diffusion to improve the phenomenon of the bright dark skewness of light inlet side.Wherein, the density adjustment is done in being provided with according to light sources of site, to reach the preferable effect that alleviates bright dark skewness.In this, the adjustment mode can be gradual change site spacing and/or gradual change site size etc.And these sites can utilize the sandblast manufacturing technology and form.
At this, diffusion part 230 can be integrated design with plate body 212, or identical material is made.That is to say, the stretch out cantilever of (toward first groove 214) of the plate body 212 of top that diffusion part 230 can be the opening of second groove 216, and site 240 is arranged on the surface of cantilever, as shown in Figure 7.
In addition, this diffusion part 230 also can be the film that sticks together of the upper surface that is arranged at light sources 220, and site 240 is arranged on the surface of sticking together film.And this side that sticks together film is connected to the side of plate body of top of the opening of second groove.
Wherein, site 240 can be arranged on the upper surface of diffusion part 230 (for example: cantilever or stick together film), as shown in Figure 6A.Also or on the upper and lower surface of diffusion part 230 (for example: cantilever or stick together film) be provided with site 240, shown in Fig. 6 B, at this moment, upper and lower lip-deep site 240 can be crisscross arranged.
In this, the bottom of second groove 216 also can be and is trapezoidal (as shown in Figure 8) haply except can be rectangular haply shown in Fig. 6 B, or for being circular-arc (as shown in Figure 9) haply.
In this, the preferred size of the opening surface of second groove is the size corresponding to the light-emitting area of pairing light sources.
Bottom with second groove 216 is rectangular haply, and with reference to Figure 10, Figure 11 A, the long L1 of the opening surface of second groove 216 and wide L2 are equal to the long D1 and the wide D2 of the light-emitting area of corresponding light sources 220 respectively haply.
Bottom with second groove 216 is rectangular haply, and with reference to Figure 10, Figure 11 B, the long L1 of the opening surface of second groove 216 and wide L2 are equal to the long D1 and the wide D2 of the light-emitting area of corresponding light sources 220 respectively haply.
Bottom with second groove 216 is circular-arc haply, and with reference to Figure 10, Figure 11 C, the minor axis A1 of the opening surface of second groove 216 and major axis A 2 are equal to the long D1 and the wide D2 of the light-emitting area of corresponding light sources 220 respectively haply.
Moreover, with reference to Figure 12, between diffuser plate 260 and the liquid crystal panel 300 at least one blast sheet 270 can be set again, with the utilization factor of further lifting light.
At this, with the existing backlight module shown in Figure 1B with as shown in Figure 9 carry out emulation experiment according to backlight module of the present invention, can learn, with respect to existing backlight module, can increase by about about 6～8% optical coupling efficient according to backlight module of the present invention, increase and utilize about 30～50% light sources lateral direction light emission, and can alleviate the phenomenon of the bright blanking bar skewness of light inlet side.
Though technology contents of the present invention discloses as above with preferred embodiment; but it is not in order to limit the present invention; anyly have the knack of this skill person; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when defining with claim.
Claims (42)
1. light guide structure, this light guide structure comprises:
One light guide plate, it comprises: a plate body; At least one first groove is positioned at a side of described plate body; And at least one second groove, lay respectively at described first bottom portion of groove, and be positioned at the bottom of the described side of described plate body;
At least one diffusion part, it lays respectively at described first groove top; And
A plurality of sites, it is positioned at described diffusion part surface.
2. light guide structure as claimed in claim 1 is characterized in that, each described diffusion part is the opening top of described plate body from described second groove, and toward a cantilever of described first groove extension, and described site is arranged on the surface of described cantilever.
3. light guide structure as claimed in claim 1 is characterized in that, each described diffusion part more comprises:
One sticks together film, and it is positioned at the upper surface of light sources, and described site is arranged on the described surface of sticking together film.
4. light guide structure as claimed in claim 3 is characterized in that, described site is arranged on the described upper surface that sticks together film.
5. light guide structure as claimed in claim 3 is characterized in that, described site is arranged on the described upper surface and lower surface that sticks together film.
6. light guide structure as claimed in claim 3 is characterized in that, a described side that sticks together film connects the described side of described plate body of the opening top of described second groove.
7. light guide structure as claimed in claim 1 is characterized in that, it is circular-arc that the bottom of described second groove is haply.
8. light guide structure as claimed in claim 1 is characterized in that the bottom of described second groove is rectangular haply.
9. light guide structure as claimed in claim 1 is characterized in that, it is trapezoidal that the bottom of described second groove is haply.
10. light guide structure as claimed in claim 1 is characterized in that, the degree of depth of described second groove is adjusted according to the thickness of described plate body.
11. light guide structure as claimed in claim 1 is characterized in that, described site utilizes the sandblast manufacturing technology and is formed at described diffusion part surface.
12. a backlight module, this backlight module comprises:
One light guide plate, it comprises: a plate body; At least one first groove is positioned at a side of described plate body; And at least one second groove, lay respectively at described first bottom portion of groove, and be positioned at the bottom of the described side of described plate body;
At least one light sources, it lays respectively in described first groove, and the light-emitting area of described light sources corresponds respectively to described second groove;
At least one diffusion part, it lays respectively at described first groove top; And
A plurality of sites, it is positioned at described diffusion part surface.
13. backlight module as claimed in claim 12 is characterized in that, each described diffusion part is the opening top of described plate body from described second groove, and toward a cantilever of described first groove extension, and described site is arranged on the surface of described cantilever.
14. backlight module as claimed in claim 12 is characterized in that, each described diffusion part more comprises:
One sticks together film, and it is positioned at the upper surface of described light sources, and described site is arranged on the described surface of sticking together film.
15. backlight module as claimed in claim 14 is characterized in that, a described side that sticks together film connects the described side of described plate body of the opening top of described second groove.
16. backlight module as claimed in claim 13 is characterized in that, the size of the opening surface of described second groove is corresponding to the size of the light-emitting area of pairing described light sources.
17. backlight module as claimed in claim 13 is characterized in that, it is circular-arc that the bottom of described second groove is haply.
18. backlight module as claimed in claim 17 is characterized in that, the major axis of the opening surface of described second groove and minor axis are equal to the length of light-emitting area of corresponding described light sources and wide respectively haply.
19. backlight module as claimed in claim 12 is characterized in that, the bottom of described second groove is rectangular haply.
20. backlight module as claimed in claim 19 is characterized in that, the length of the length of the opening surface of described second groove and the wide light-emitting area that is equal to corresponding described light sources respectively haply and wide.
21. backlight module as claimed in claim 12 is characterized in that, it is trapezoidal that the bottom of described second groove is haply.
22. backlight module as claimed in claim 21 is characterized in that, the length of the length of the opening surface of described second groove and the wide light-emitting area that is equal to corresponding described light sources respectively haply and wide.
23. backlight module as claimed in claim 12 is characterized in that, the degree of depth of described second groove is adjusted according to the kind of described light sources.
24. backlight module as claimed in claim 12 is characterized in that, the degree of depth of described second groove is adjusted according to the thickness of described plate body.
25. backlight module as claimed in claim 12 is characterized in that, described site utilizes the sandblast manufacturing technology and is formed at described diffusion part surface.
26. backlight module as claimed in claim 12 is characterized in that, each described light sources comprises at least one light emitting diode.
27. a LCD, this LCD comprises:
One reflector plate;
One light guide plate, it is positioned at described reflector plate top, and described light guide plate comprises: a plate body; At least one first groove, it is positioned at a side of described plate body; And at least one second groove, it lays respectively at described first bottom portion of groove, and is positioned at the bottom of the described side of described plate body;
At least one light sources, it lays respectively in described first groove, and the light-emitting area of described light sources corresponds respectively to described second groove;
At least one diffusion part, it lays respectively at described first groove top;
A plurality of sites, it is positioned at described diffusion part surface;
One diffuser plate, it is positioned at described light guide plate and described diffusion part top; And
One liquid crystal panel, it is positioned at described diffuser plate top.
28. LCD as claimed in claim 27 is characterized in that, each described diffusion part is the opening top of described plate body from described second groove, and toward a cantilever of described first groove extension, and described site is arranged on the surface of described cantilever.
29. LCD as claimed in claim 27 is characterized in that, each described diffusion part more comprises:
One sticks together film, and it is positioned at the upper surface of described light sources, and described site is arranged on the described surface of sticking together film.
30. LCD as claimed in claim 29 is characterized in that, a described side that sticks together film connects the described side of described plate body of the opening top of described second groove.
31. LCD as claimed in claim 27 is characterized in that, the size of the opening surface of described second groove is corresponding to the size of the light-emitting area of pairing described light sources.
32. LCD as claimed in claim 27 is characterized in that, it is circular-arc that the bottom of described second groove is haply.
33. LCD as claimed in claim 32 is characterized in that, the major axis of the opening surface of described second groove and minor axis are equal to the length of light-emitting area of corresponding described light sources and wide respectively haply.
34. LCD as claimed in claim 27 is characterized in that, the bottom of described second groove is rectangular haply.
35. LCD as claimed in claim 34 is characterized in that, the length of the length of the opening surface of described second groove and the wide light-emitting area that is equal to corresponding described light sources respectively haply and wide.
36. LCD as claimed in claim 27 is characterized in that, it is trapezoidal that the bottom of described second groove is haply.
37. LCD as claimed in claim 36 is characterized in that, the length of the length of the opening surface of described second groove and the wide light-emitting area that is equal to corresponding described light sources respectively haply and wide.
38. LCD as claimed in claim 27 is characterized in that, the degree of depth of described second groove is adjusted according to the kind of described light sources.
39. LCD as claimed in claim 27 is characterized in that, the degree of depth of described second groove is adjusted according to the thickness of described plate body.
40. LCD as claimed in claim 27 is characterized in that, described site utilizes the sandblast manufacturing technology and is formed at described diffusion part surface.
41. LCD as claimed in claim 27 is characterized in that, each described light sources comprises at least one light emitting diode.
42. LCD as claimed in claim 27 is characterized in that, described LCD more comprises: at least one blast sheet, and between described diffuser plate and described liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101633312A CN100385273C (en) | 2006-12-01 | 2006-12-01 | Liquid crystal display device, back light modular and light guide structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101633312A CN100385273C (en) | 2006-12-01 | 2006-12-01 | Liquid crystal display device, back light modular and light guide structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952706A CN1952706A (en) | 2007-04-25 |
| CN100385273C true CN100385273C (en) | 2008-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101633312A Expired - Fee Related CN100385273C (en) | 2006-12-01 | 2006-12-01 | Liquid crystal display device, back light modular and light guide structure |
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| CN (1) | CN100385273C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4996433B2 (en) * | 2007-11-27 | 2012-08-08 | ミネベア株式会社 | Surface lighting device |
| CN102252276A (en) * | 2011-04-13 | 2011-11-23 | 苏州茂立光电科技有限公司 | Light source module |
| CN102122014A (en) * | 2011-04-14 | 2011-07-13 | 无锡睿涛光电科技有限公司 | Ultrathin light-guiding film and light-guiding structure thereof |
| TWI561897B (en) * | 2013-07-17 | 2016-12-11 | Radiant Opto Electronics Corp | Backlight module and liquid crystal display |
| CN105607178A (en) * | 2015-12-30 | 2016-05-25 | 广东亿芯照明科技有限公司 | Light guide plate formed by one-time extrusion moulding and manufacturing process |
| CN109061791A (en) * | 2018-08-08 | 2018-12-21 | 深圳市华星光电技术有限公司 | A kind of light guide plate and backlight module |
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| JPH1124582A (en) * | 1997-07-03 | 1999-01-29 | Bridgestone Corp | Plane emitter |
| JP2004259688A (en) * | 2003-02-28 | 2004-09-16 | Sanyo Electric Co Ltd | Light guide plate, backlight model, and display device |
| CN1570720A (en) * | 2003-07-23 | 2005-01-26 | 鸿富锦精密工业（深圳）有限公司 | Backlight source device and liquid crystal display |
| CN1645215A (en) * | 2005-02-08 | 2005-07-27 | 友达光电股份有限公司 | Backlight module |
| CN1687826A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure |
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2006
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1124582A (en) * | 1997-07-03 | 1999-01-29 | Bridgestone Corp | Plane emitter |
| JP2004259688A (en) * | 2003-02-28 | 2004-09-16 | Sanyo Electric Co Ltd | Light guide plate, backlight model, and display device |
| CN1570720A (en) * | 2003-07-23 | 2005-01-26 | 鸿富锦精密工业（深圳）有限公司 | Backlight source device and liquid crystal display |
| CN1645215A (en) * | 2005-02-08 | 2005-07-27 | 友达光电股份有限公司 | Backlight module |
| CN1687826A (en) * | 2005-05-30 | 2005-10-26 | 友达光电股份有限公司 | Backlight structure |
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| CN1952706A (en) | 2007-04-25 |
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