CN100426091C - Backlight module and light conducting plate - Google Patents
Backlight module and light conducting plate Download PDFInfo
- Publication number
- CN100426091C CN100426091C CNB031143903A CN03114390A CN100426091C CN 100426091 C CN100426091 C CN 100426091C CN B031143903 A CNB031143903 A CN B031143903A CN 03114390 A CN03114390 A CN 03114390A CN 100426091 C CN100426091 C CN 100426091C
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- Prior art keywords
- guide plate
- light guide
- incidence surface
- stepped projection
- light
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Abstract
The present invention relates to a light guide plate which comprises at least one light incident surface, one light exit surface which is adjacent to the light incident surface, and a bottom surface which is opposite to the light exit surface, wherein the light exit surface is provided with a plurality of staircase-shaped bulges. A back light module comprises a light guide plate and at least one light source which is arranged on one side of the light guide plate, wherein a light exit surface of the light guide plate is provided with a plurality of staircase-shaped bulges.
Description
[technical field]
The present invention relates to module backlight and light guide plate thereof that a kind of LCD is used.
[background technology]
LCD be a kind of can not self-emission display apparatus, it is passing through or the obstructed realization demonstration of coming by control light beam that external light source sends mainly, therefore need corresponding backlight or preceding optical mode group, this backlight or preceding optical mode group is that the beam direction display panel that external light source is sent is realized Presentation Function.
Seeing also Fig. 1, is a kind of prior art module 1 backlight, and this module 1 backlight comprises a light source 11, a light source cover 12, a reflecting plate 14, a light guide plate 13 and a blast sheet (Brightness Enhance Film, BEF) 15.This light guide plate 13 is roughly plate shaped, and it comprises an incidence surface 131, a bottom surface 132 and an exiting surface 133, and bottom surface 132 is distributed with a plurality of sites 134.Wherein this light source 11 is that incidence surface 131 with light guide plate 13 is oppositely arranged, this light source cover 12 is at the opposite side of light source 11 relative light guide plate 13, be used for increasing the light intensity of guiding light guide plate 13, the stacking successively placement of this reflecting plate 14, light guide plate 13 and blast sheet 15, the exiting surface 133 of these blast sheet 15 contiguous light guide plate 13, and be positioned between a light guide plate 13 and the liquid crystal panel (figure does not indicate).The light beam that sends by light source 11, this blast sheet 15 of guiding after light guide plate 13 and reflecting plate 14 effects, 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 guiding liquid crystal panel (figure does not indicate).Yet the element that this module 1 backlight adopts is more and each element is separate, so light beam meeting generation loss in transmission course, and then reduces the emitting brightness of this module 1 backlight.In addition, because the price of blast sheet 15 is higher, increased the cost of this module 1 backlight.
Seeing also Fig. 2, is the module 2 a kind of backlight that the United States Patent (USP) of on October 31st, 2000 bulletin discloses for the 6th, 139, No. 162, and it comprises a light source 21 and this light source 21 a corresponding light source cover 22 and light guide plate 23.The exiting surface 231 of this light guide plate 23 is distributed with a plurality of V-arrangement prism structures 232, and the span of the drift angle of this V-arrangement prism structure 232 is roughly 60 and spends to 120 degree, and its best angle is 90 degree.The modes such as combination of reflecting plate (figure indicates) or reflecting plate and site also can be adopted in a plurality of sites of 233 distributions, bottom surface (figure indicates) of this light guide plate 23.The light beam that this light source 21 sends enters light guide plate 23, after the scattering of process 233 sites, light guide plate 23 bottom surfaces, the reflection, and the exiting surface 231 of guiding light guide plate 23, this exiting surface 231 carries out optically focused with this scattering, beam reflected, forms the higher output beam of brightness.But, the V-arrangement prism structure 232 of this light guide plate 23 and its exiting surface 231 is formed in one, the drift angle angle of V-arrangement prism structure 232 and smoothness, the precision requirement on prism inclined-plane are higher, generally difficult control, thus cause emitting brightness to be difficult to reach the expectation effect.
[summary of the invention]
The lower shortcoming of emitting brightness in order to overcome the prior art light guide plate the invention provides the higher light guide plate of a kind of emitting brightness.
For the lower shortcoming of emitting brightness that overcomes prior art module backlight, the invention provides the higher module backlight of a kind of emitting brightness.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of light guide plate is provided, it comprises at least one incidence surface, an exiting surface adjacent with this incidence surface and one and this exiting surface opposed bottom surface, wherein this exiting surface is provided with a plurality of stepped projections, these a plurality of stepped projections all are the shape symmetries, and these a plurality of stepped projections are one-body molded with this light guide plate.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of module backlight is provided, it comprises a light guide plate and at least one light source that is arranged on this light guide plate one side, wherein the exiting surface of this light guide plate is provided with a plurality of stepped projections, these a plurality of stepped projections all are the shape symmetries, and these a plurality of stepped projections are one-body molded with this light guide plate.
Compared with prior art, the invention has the beneficial effects as follows: the light guide plate exiting surface of module backlight is a plurality of stepped projections of distribution evenly, and these a plurality of stepped projections and this light guide plate are one-body molded, this structure can improve the optics transmissibility factor of light guide plate, and can save the blast sheet, not only reduce cost, and can effectively improve the brightness of this exiting surface.Adopt the module backlight of this light guide plate also to have advantage of high emitting brightness.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of a kind of prior art module backlight.
Fig. 2 is the stereographic map of another kind of prior art module backlight.
Fig. 3 is the stereographic map of the present invention's module first embodiment backlight.
Fig. 4 is the synoptic diagram of module backlight shown in Figure 3.
Fig. 5 is the synoptic diagram of the present invention's module second embodiment backlight.
Fig. 6 is the synoptic diagram of the present invention's module the 3rd embodiment backlight.
Fig. 7 is the synoptic diagram of the present invention's module the 4th embodiment backlight.
Fig. 8 is the synoptic diagram of the present invention's module the 5th embodiment backlight.
Fig. 9 is the synoptic diagram of the present invention's module the 6th embodiment backlight.
Figure 10 is the synoptic diagram of the present invention's module the 7th embodiment backlight.
[embodiment]
Seeing also Fig. 3 and Fig. 4, is respectively the stereographic map and the synoptic diagram of the present invention's module first embodiment backlight.This module 3 backlight comprises a light guide plate 33 and a light source 31, this light guide plate 33 comprises an incidence surface 333, an exiting surface 331 adjacent with this incidence surface 333 and relative with exiting surface 331 and vertical with incidence surface 333 bottom surface 335, this light source 31 is oppositely arranged with the incidence surface 333 of light guide plate 33, and a light source cover 32 parts are surrounded this light source 31.This incidence surface 333 receives the light beam that sends from light source 31, and derive by exiting surface 331 this beam divergence, reflection back guiding exiting surface 331 this bottom surface 335 with this light beam.This exiting surface 331 is provided with a plurality of stepped projections 332, this stepped projection 332 and light guide plate 33 are one-body molded, effect be with exit direction away from the light beam at light guide plate 33 exiting surfaces 331 centers to exiting surface 331 centre convergences, effectively improve optics transmissibility factor (the Modulation Transfer Function of light guide plate 33, MTF), thus improve the emitting brightness of light guide plate 33.This stepped projection 332 is made up of a plurality of rectangular parallelepiped steps (figure does not indicate), and the width of this step can be even, also can increase gradually along the direction away from incidence surface.
Seeing also Fig. 5, is the synoptic diagram of the present invention's module second embodiment backlight.This module 4 backlight comprises a light guide plate 43 and a light source 41, this light guide plate 43 comprises an incidence surface 433, an exiting surface 431 adjacent with this incidence surface 433 and relative with exiting surface 431 and vertical with this incidence surface 433 bottom surface 435, this light source 41 is oppositely arranged with the incidence surface 433 of light guide plate 43, and a light source cover 42 parts are surrounded this light source 41.This incidence surface 433, exiting surface 431 are provided with a plurality of stepped projections 434,432 respectively, and this stepped projection 434,432 and light guide plate 43 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 43, thereby improve the emitting brightness of light guide plate 43.
Seeing also Fig. 6, is the synoptic diagram of the present invention's module the 3rd embodiment backlight.This module 5 backlight comprises a light guide plate 53 and the relative light source 51 that is arranged on these light guide plate both sides.This light guide plate 53 comprises two incidence surfaces 533, an exiting surface 531 adjacent with this incidence surface 533 and relative with this exiting surface 531 and vertical with incidence surface 533 bottom surface 535, this light source 51 is oppositely arranged with the incidence surface 533 of light guide plate 53 respectively, and two light source covers 52 part respectively surround this light source 51.This exiting surface 531 is provided with a plurality of stepped projections 532, and this stepped projection 532 and light guide plate 53 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 53, thereby improves the emitting brightness of light guide plate 53.
Seeing also Fig. 7, is the synoptic diagram of the present invention's module the 4th embodiment backlight.This module 6 backlight comprises a light guide plate 63 and the relative light source 61 that is arranged on these light guide plate both sides, this light guide plate 63 comprises two incidence surfaces 633, an exiting surface 631 adjacent with this incidence surface 633 and relative with this exiting surface 631 and vertical with incidence surface 633 bottom surface 635, this light source 61 is oppositely arranged with the incidence surface 633 of light guide plate 63 respectively, and two light source covers, 62 parts are surrounded this light source 61.This incidence surface 633, exiting surface 631 are provided with a plurality of stepped projections 634,632 respectively, and this stepped projection 634,632 and light guide plate 63 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 63, thereby improve the emitting brightness of light guide plate 63.
Seeing also Fig. 8, is the synoptic diagram of the present invention's module the 5th embodiment backlight.This module 7 backlight comprises a light guide plate 73 and a light source 71, this light guide plate 73 comprise an incidence surface 733, an exiting surface 731 adjacent with this incidence surface 733 and one and this exiting surface 731 is relative and and incidence surface 733 bottom surface 735 that tilts to intersect, this light source 71 is oppositely arranged with the incidence surface 733 of light guide plate 73, and a light source cover 72 parts are surrounded this light source 71.This exiting surface 731 is provided with a plurality of stepped projections 732, and this stepped projection 732 and light guide plate 73 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 73, thereby improves the emitting brightness of light guide plate 73.
Seeing also Fig. 9, is the synoptic diagram of the present invention's module the 6th embodiment backlight.This module 8 backlight comprises a light guide plate 83 and a light source 81, this light guide plate 83 comprise an incidence surface 833, an exiting surface 831 adjacent with this incidence surface 833 and one and this exiting surface 831 is relative and and incidence surface 833 bottom surface 835 that tilts to intersect, this light source 81 is oppositely arranged with the incidence surface 833 of light guide plate 83, and a light source cover 82 parts are surrounded this light source 81.This incidence surface 833, exiting surface 831 are provided with a plurality of stepped projections 834,832 respectively, and this stepped projection 834,832 and light guide plate 83 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 83, thereby improve the emitting brightness of light guide plate 83.
Seeing also Figure 10, is the synoptic diagram of the present invention's module the 7th embodiment backlight.This module 9 backlight comprises a light guide plate 93 and the relative light source 91 that is arranged on these light guide plate both sides, this light guide plate 93 comprise two incidence surfaces 933, an exiting surface 931 adjacent with this incidence surface 933 and one and this exiting surface 931 is relative and and incidence surface 933 bottom surface 935 that all tilts to intersect, this light source 91 is oppositely arranged with the incidence surface 933 of light guide plate 93 respectively, and two light source covers 92 part respectively surround this light source 91.This incidence surface 933, exiting surface 931 are provided with a plurality of stepped projections 934,932 respectively, and this stepped projection 934,932 and light guide plate 93 are one-body molded, and it effectively improves the optics transmissibility factor of light guide plate 93, thereby improve the emitting brightness of light guide plate 93.
Module backlight of the present invention is not limited to said structure, the bottom surface of its light guide plate can be provided with a plurality of sites, the material that adopt this a plurality of site is high diverging light material, its shape can be circular, square or rhombus, it can be evenly distributed on the bottom surface of light guide plate, also can be along increasing its size or density gradually away from incidence surface.Bottom surface of light guide plate is provided with a reflecting plate relatively simultaneously, and this reflecting plate can be gone into light guide plate with the beam reflection that light guide plate is leaked, and improves the brightness of light guide plate exiting surface.This reflecting plate also can be reflectance coating, and this reflectance coating pastes the bottom surface in light guide plate.
Claims (16)
1. light guide plate, it comprises at least one incidence surface, an exiting surface adjacent with this incidence surface and one and this exiting surface opposed bottom surface, it is characterized in that: this exiting surface is provided with a plurality of first stepped projection, this a plurality of first stepped projection all is the shape symmetry, and this a plurality of first stepped projection is one-body molded with this light guide plate.
2. light guide plate according to claim 1 is characterized in that: this first stepped projection rule evenly is arranged on the exiting surface.
3. light guide plate according to claim 1 is characterized in that: the width of this first stepped projection is along increasing gradually away from the incidence surface direction.
4. light guide plate according to claim 1 is characterized in that: this bottom surface is perpendicular to incidence surface.
5. light guide plate according to claim 1 is characterized in that: this bottom surface and incidence surface tilt to intersect.
6. light guide plate according to claim 1 is characterized in that: this at least one incidence surface rule evenly is provided with a plurality of second stepped projection.
7. light guide plate according to claim 6 is characterized in that: this second stepped projection and light guide plate are formed in one.
8. module backlight, it comprises a light guide plate and at least one light source that is arranged on this light guide plate one side, this light guide plate further comprises at least one incidence surface, an exiting surface adjacent with this incidence surface and one and this exiting surface opposed bottom surface, it is characterized in that: this exiting surface is provided with a plurality of first stepped projection, this a plurality of first stepped projection all is the shape symmetry, and this a plurality of first stepped projection is one-body molded with this light guide plate.
9. module backlight according to claim 8 is characterized in that: this first stepped projection rule evenly is arranged on the exiting surface.
10. module backlight according to claim 8 is characterized in that: the width of this first stepped projection is along increasing gradually away from the incidence surface direction.
11. module backlight according to claim 8 is characterized in that: this bottom surface is perpendicular to incidence surface.
12. module backlight according to claim 8 is characterized in that: this bottom surface and incidence surface tilt to intersect.
13. module backlight according to claim 8 is characterized in that: this at least one incidence surface rule evenly is provided with a plurality of second stepped projection.
14. module backlight according to claim 13 is characterized in that: this second stepped projection and light guide plate are formed in one.
15. module backlight according to claim 8 is characterized in that: this module backlight further comprises the reflecting plate that a relative bottom surface of light guide plate is provided with.
16. module backlight according to claim 8 is characterized in that: this module backlight comprises that further one is covered on the reflectance coating of this bottom surface of light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031143903A CN100426091C (en) | 2003-05-02 | 2003-05-02 | Backlight module and light conducting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031143903A CN100426091C (en) | 2003-05-02 | 2003-05-02 | Backlight module and light conducting plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542465A CN1542465A (en) | 2004-11-03 |
| CN100426091C true CN100426091C (en) | 2008-10-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031143903A Expired - Fee Related CN100426091C (en) | 2003-05-02 | 2003-05-02 | Backlight module and light conducting plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100426091C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100561660C (en) * | 2004-12-22 | 2009-11-18 | 鸿富锦精密工业（深圳）有限公司 | A kind of field emission light source and use the module backlight of this light source |
| CN100454101C (en) | 2005-09-21 | 2009-01-21 | 鸿富锦精密工业（深圳）有限公司 | Light-guide plate |
| CN103176238B (en) * | 2011-12-26 | 2017-03-01 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and the backlight module using this light guide plate |
| CN103135153B (en) * | 2013-03-14 | 2017-04-12 | 深圳市汇晨电子股份有限公司 | Light diffusion plate and manufacture method thereof |
| CN109188765A (en) * | 2018-10-30 | 2019-01-11 | 合肥京东方光电科技有限公司 | Light guiding film and preparation method thereof, area source, display device |
| TWI820707B (en) * | 2022-03-11 | 2023-11-01 | 瑞儀光電股份有限公司 | Backlight module and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09318942A (en) * | 1996-05-28 | 1997-12-12 | Mitsubishi Electric Corp | Color liquid crystal display device |
| JP2000019330A (en) * | 1998-06-30 | 2000-01-21 | Fujitsu Kasei Kk | Front light unit and liquid crystal display device |
| JP2000100229A (en) * | 1998-09-28 | 2000-04-07 | Enplas Corp | Light guiding plate, side light type surface light source device and liquid crystal display device |
| US6064452A (en) * | 1996-04-17 | 2000-05-16 | Hitachi, Ltd. | Single plate color liquid crystal display apparatus |
| US20010033482A1 (en) * | 2000-02-24 | 2001-10-25 | Seiko Epson Corporation | Illumination device |
-
2003
- 2003-05-02 CN CNB031143903A patent/CN100426091C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6064452A (en) * | 1996-04-17 | 2000-05-16 | Hitachi, Ltd. | Single plate color liquid crystal display apparatus |
| JPH09318942A (en) * | 1996-05-28 | 1997-12-12 | Mitsubishi Electric Corp | Color liquid crystal display device |
| JP2000019330A (en) * | 1998-06-30 | 2000-01-21 | Fujitsu Kasei Kk | Front light unit and liquid crystal display device |
| JP2000100229A (en) * | 1998-09-28 | 2000-04-07 | Enplas Corp | Light guiding plate, side light type surface light source device and liquid crystal display device |
| US20010033482A1 (en) * | 2000-02-24 | 2001-10-25 | Seiko Epson Corporation | Illumination device |
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| Publication number | Publication date |
|---|---|
| CN1542465A (en) | 2004-11-03 |
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Granted publication date: 20081015 Termination date: 20160502 |