CN100395615C - Ligh guide plate and back ligth module using said light guide plate - Google Patents
Ligh guide plate and back ligth module using said light guide plate Download PDFInfo
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- CN100395615C CN100395615C CNB2004100524323A CN200410052432A CN100395615C CN 100395615 C CN100395615 C CN 100395615C CN B2004100524323 A CNB2004100524323 A CN B2004100524323A CN 200410052432 A CN200410052432 A CN 200410052432A CN 100395615 C CN100395615 C CN 100395615C
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- guide plate
- area
- light guide
- viewing area
- light
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Abstract
The present invention provides a light guide plate and a backlight module adopting the light guide plate. The light guide plate comprises a display region and a redundancy region adjacent to the display region, wherein the display region corresponds to the main display region of a display panel; the redundancy region is used for isolating dark bands produced by unevenness of incident light rays and comprises a light incident surface. The light guide plate and the backlight module adopting the light guide plate have the advantage of simple design.
Description
[technical field]
The invention relates to a kind of light guide plate and adopt the module backlight of this light guide plate, particularly (Light Emitting Diode LED) is the edge light type module backlight of light source with light emitting diode about a kind of.
[background technology]
Because the liquid crystal itself in the panel of LCD is not had a characteristics of luminescence, thereby, for reaching display effect, need to give the LCD panel that one planar light source device is provided, as module backlight, its function is to provide the area source that briliancy is abundant and be evenly distributed to panel of LCD.
See also Fig. 1, the module backlight of prior art mainly is made up of light source 5, light source cover 6, light guide plate 3, reflecting plate 4, diffuser plate 2 and two light-collecting pieces 1.Wherein, this light source 5 is a line source, mainly contain electroluminescent lamp (Electroluminiscent Lamp, EL) and cold cathode fluorescent lamp (Cold Cathode Fluorescence Lamp, CCFL) two kinds, it is arranged at light guide plate 3 one sides, the cooperation by light source cover 6 with light transmission to this light guide plate 3.The light that the effect of this light guide plate 3 is to send in guide lights source 5 improves display panel (figure does not show) glorious degrees and homogeneity simultaneously from exiting surface 7 outgoing.Reflecting plate 4 is arranged at a side of the bottom surface 8 of this light guide plate 3, being reflected into once more in this light guide plate 3 by the light of bottom surface 8 outgoing of light guide plate 3, improves the utilization factor of light.Two surfaces up and down of diffuser plate 2 are provided with minute protrusions (figure does not show), and it act as softization of pattern that will incide the light scatter in the diffuser plate 2 and make display panel.Light-collecting piece 1 also claims prism plate, and its effect is that light is produced the effect of converging, and to improve the bright dipping briliancy of module backlight, reduces power consumption.
Another kind of prior art module backlight as shown in Figure 2, this module 10 backlight comprises that light source 20 and that a light guide plate 22, is positioned at these light guide plate 22 1 sides is arranged on the reflecting plate 23 of these light guide plate 22 belows.This light source 20 is made of plural LED, and this light guide plate 22 comprises an exiting surface 221 that is made of a plurality of equally distributed trickle V-shaped grooves.
Seeing also Fig. 3, is the blanking bar mechanism of production synoptic diagram that contains the module backlight of two LEDs.Because being a cone, the transmission of the emergent ray space of LED distributes, thereby the emergent light of this led light source 201 and 202 is when being incident to a space plane 200, the zone 261,262 and 263 that this space plane 200 can exist emergent light to arrive, this zone 261,262 and 263 is commonly called the blanking bar district.
In sum, in this module 10 backlight, when light source 20 is incident to light guide plate 22, can there be blanking bar district 261,262 and 263 in this light guide plate 22, and because whole light guide plate 22 is corresponding with the main viewing area of display panel, thereby blanking bar district 261,262 and 263 has a strong impact on the demonstration briliancy and the quality of display panel.Be to eliminate blanking bar, the structure of the V-shaped groove by changing exiting surface 221 is in the hope of eliminating blanking bar usually, and still, these modes all only can slacken and can't eliminate the generation of blanking bar fully, and the structural design of V-shaped groove relates to optical analysis, and complexity is higher.
[summary of the invention]
Complicated and for overcoming prior art light guide plate design because the existence in blanking bar district makes the problem of display quality decline of the main viewing area of display panel, the invention provides a kind of light guide plate of simplicity of design, this light guide plate is even and briliancy is higher corresponding to the main viewing area bright dipping of display panel.
Complicated and for overcoming the prior art design of backlight module because the existence in blanking bar district makes the problem of display quality decline of the main viewing area of display panel, the invention provides a kind of module backlight of simplicity of design, this module backlight is even and briliancy is higher corresponding to the main viewing area bright dipping of display panel.
Light guide plate of the present invention comprises the redundant area that a viewing area and contiguous this viewing area are provided with.Described viewing area is corresponding with the main viewing area of display panel, described redundant area is used to isolate owing to the uneven blanking bar that produces of incident ray, described redundant area comprises a light entrance face and a light-emitting face adjacent with this light entrance face, this light-emitting face is provided with a secondary display area, and this secondary display area is corresponding with the auxiliary viewing area of display panel.
The present invention's module backlight comprises a light guide plate and a light source.Described light guide plate comprises the redundant area that a viewing area and contiguous this viewing area are provided with, described viewing area is corresponding with the main viewing area of display panel, described redundant area is used to isolate owing to the uneven blanking bar that produces of incident ray, described redundant area comprises a light entrance face and a light-emitting face adjacent with this light entrance face, contiguous this light entrance face of described light source is provided with, this light-emitting face is provided with a secondary display area, and this secondary display area is corresponding with the auxiliary viewing area of display panel.
Compared to existing technology, because of light guide plate of the present invention and adopt the module backlight of this light guide plate to include a redundant area and a viewing area, this redundant area is used to isolate owing to the uneven blanking bar that produces of incident ray, the main viewing area of the pairing display panel in blanking bar district and viewing area is isolated, so the bright dipping of main viewing area is even and briliancy is higher.In addition, light guide plate of the present invention and the module backlight that adopts this light guide plate are when design, and only need set up a redundant area isolates blanking bar, does not need therefore, to design simpler by changing the V-shaped groove structure and avoiding blanking bar to produce by the optical computing of complexity.
[description of drawings]
Fig. 1 is the perspective view of prior art module backlight.
Fig. 2 is the perspective view of the module backlight of another kind of prior art.
Fig. 3 is the blanking bar mechanism of production synoptic diagram that contains the module backlight of two LEDs.
Fig. 4 is the perspective view of the present invention's module first embodiment backlight.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the blast structural representation of the present invention's module second embodiment backlight.
Fig. 7 is the perspective view of the present invention's module the 3rd embodiment backlight.
Fig. 8 is the present invention's module backlight user mode reference diagram in the phone in action.
[embodiment]
Please consulting Fig. 4 to Fig. 5 together, is the schematic perspective view and the vertical view thereof of the present invention's module first embodiment backlight.This module 40 backlight comprises a light guide plate 49 and a light source 43.
This light guide plate 49 comprises the redundant area 41 that a viewing area 42 and contiguous this viewing area 42 are provided with, and this viewing area 42 is the one ejection formation with redundant area 41, and the two is parallelepiped structure, and material all is transparent polymeric resin or glass.This viewing area 42 is corresponding with the main viewing area of display panel (figure does not show).This redundant area 41 is positioned at contiguous light source 43 1 ends of this light guide plate 49, it comprises a light entrance face 48 and a light-emitting face 47 adjacent with this light entrance face 48, this light-emitting face 47 is provided with a secondary display area 411, and this secondary display area 411 is corresponding with the auxiliary viewing area of display panel.The auxiliary viewing area of display panel is commonly used to show non-important information such as time or date; With respect to auxiliary viewing area, the main viewing area of display panel is commonly used to display image or important text information, auxiliary viewing area and main viewing area can coexist as in the picture window, also can isolatedly place two picture windows respectively, can also the picture-in-picture mode exist.In the present embodiment, this secondary display area 411 is circular, its with display panel on the circle that is provided with assist the viewing area corresponding, be used to show circular clock face.
This light source 43 comprises single or multiple such as pointolites such as LED, is two LED in the present embodiment.
In the use, the incident ray that sends from light source 43 at first is projected to the redundant area 41 of light guide plate 49, because light source 43 bright dippings are inhomogeneous, therefore can produce blanking bar district 46 on the exiting surface 47 of this redundant area 41.In order not make this blanking bar district 46 extend to the viewing area 42 of light guide plate 49, this redundant area 41 is in extending according to circumstances away from the length on the direction of light source 43, and its length is decided according to the quantity of LED usually, and generally speaking, LED quantity is few more, and its length is long more.In a word, because the existence of redundant viewing area 41 makes that blanking bar district 46 and viewing area 42 are isolated.
Compared to existing technology, because of the light guide plate 49 of this module 40 backlight comprises a redundant area 41 and a viewing area 42, this redundant area 41 is used to isolate owing to the uneven blanking bar that produces of incident ray, blanking bar district 46 is isolated with the main viewing area of viewing area 42 pairing display panels, so the bright dipping of main viewing area is even and briliancy is higher.In addition, the light guide plate 49 of this module 40 backlight is when design, and only need set up a redundant area 41 isolates blanking bar, does not need therefore, to design simpler by changing the V-shaped groove structure and avoiding blanking bar to produce by the optical computing of complexity.
Seeing also Fig. 6, is the blast structural representation of the present invention's module second embodiment backlight.This module 50 backlight comprises a light source 53 and a light guide plate 59.With respect to first embodiment, the improvements of this module 50 backlight are: the viewing area 52 and the redundant area 51 of this light guide plate 59 is moulding respectively, pastes mutually then to form.
Seeing also Fig. 7, is the perspective view of the present invention's module the 3rd embodiment backlight.This module 60 backlight comprises a light source 63 and a light guide plate 69.With respect to first embodiment, the improvements of this module 60 backlight are: the viewing area 62 and the redundant area 61 of this light guide plate 69 all are that the cross section is the hexahedron of wedge shape; Secondary display area 611 is a rectangle, and it is corresponding with the auxiliary viewing area of the rectangle that is provided with on the display panel, is used to show date or the time.
Seeing also Fig. 8, is the present invention's module backlight user mode reference diagram in the phone in action.This action phone 86 tools, one main viewing area 87 and one with its from the auxiliary viewing area 88 of circle, during installation, the viewing area 82 of module 89 backlight is corresponding with the main viewing area 87 of mobile phone 86, the circular secondary display area 811 of redundant area 81 is just in time corresponding with the auxiliary viewing area 88 of the circle of mobile phone.Like this, main viewing area 87 is not owing to there is the blanking bar district to exist, thus bright dipping evenly and display quality higher, be used for important information such as display image or important text.And assist viewing area 88 owing to may there be the blanking bar district, display quality is more inferior, therefore is used for showing non-important information such as time or date.
Yet it is described that module backlight of the present invention and light guide plate are not limited to above-mentioned embodiment.See also Fig. 4 again, the light guide plate 49 of module 40 backlight can make the following changes: redundant area 41 is carried out doping treatment, and then redundant area 41 is owing to contain the doping particle, and its refractive index changes, and therefore the blanking bar district is had better isolation effect.
Claims (18)
1. light guide plate, it comprises a viewing area, described viewing area is corresponding with the main viewing area of display panel, it is characterized in that: this light guide plate also comprises the redundant area that contiguous this viewing area is provided with, described redundant area is used to isolate owing to the uneven blanking bar that produces of incident ray, described redundant area comprises a light entrance face and a light-emitting face adjacent with this light entrance face, this light-emitting face is provided with a secondary display area, and this secondary display area is corresponding with the auxiliary viewing area of display panel.
2. light guide plate as claimed in claim 1 is characterized in that: this incident ray is produced by pointolite.
3. light guide plate as claimed in claim 2 is characterized in that: this pointolite comprises at least one light emitting diode.
4. light guide plate as claimed in claim 1 is characterized in that: this secondary display area is circular.
5. light guide plate as claimed in claim 4 is characterized in that: the auxiliary viewing area of the circle that is provided with on this circle secondary display area and the display panel is corresponding, is used to show the ring clock dial plate.
6. light guide plate as claimed in claim 1 is characterized in that: this secondary display area is a rectangle.
7. light guide plate as claimed in claim 6 is characterized in that: the auxiliary viewing area of the rectangle that is provided with on this rectangle secondary display area and the display panel is corresponding, is used to show date or the time.
8. light guide plate as claimed in claim 1 is characterized in that: this viewing area and this redundant area are parallelepipedon or the cross section is the hexahedron of wedge shape.
9. light guide plate as claimed in claim 1 is characterized in that: be formed in one structure or be pasted together mutually of this viewing area and this redundant area.
10. module backlight, it comprises a light guide plate and a light source, described light guide plate comprises a viewing area, described viewing area is corresponding with the main viewing area of display panel, it is characterized in that: this light guide plate also comprises the redundant area that contiguous this viewing area is provided with, described redundant area is used to isolate owing to the uneven blanking bar that produces of incident ray, described redundant area comprises a light entrance face and a light-emitting face adjacent with this light entrance face, contiguous this light entrance face of described light source is provided with, this light-emitting face is provided with a secondary display area, and this secondary display area is corresponding with the auxiliary viewing area of display panel.
11. module backlight as claimed in claim 10 is characterized in that: this light source is a pointolite.
12. module backlight as claimed in claim 10 is characterized in that: this pointolite comprises at least one light emitting diode.
13. module backlight as claimed in claim 10 is characterized in that: this secondary display area is circular.
14. module backlight as claimed in claim 13 is characterized in that: the auxiliary viewing area of the circle that is provided with on this circle secondary display area and the display panel is corresponding, is used to show the ring clock dial plate.
15. module backlight as claimed in claim 10 is characterized in that: this secondary display area is a rectangle.
16. module backlight as claimed in claim 15 is characterized in that: the auxiliary viewing area of the rectangle that is provided with on this rectangle secondary display area and the display panel is corresponding, is used to show date or the time.
17. module backlight as claimed in claim 10 is characterized in that: this viewing area and this redundant area are parallelepipedon or the cross section is the hexahedron of wedge shape.
18. module backlight as claimed in claim 10 is characterized in that: be formed in one structure or be pasted together mutually of this viewing area and this redundant area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100524323A CN100395615C (en) | 2004-11-24 | 2004-11-24 | Ligh guide plate and back ligth module using said light guide plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100524323A CN100395615C (en) | 2004-11-24 | 2004-11-24 | Ligh guide plate and back ligth module using said light guide plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1782798A CN1782798A (en) | 2006-06-07 |
| CN100395615C true CN100395615C (en) | 2008-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100524323A Expired - Fee Related CN100395615C (en) | 2004-11-24 | 2004-11-24 | Ligh guide plate and back ligth module using said light guide plate |
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| CN (1) | CN100395615C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374188B (en) * | 2007-08-22 | 2011-04-20 | 威海华菱光电有限公司 | Image sensor |
| KR102324866B1 (en) * | 2015-05-26 | 2021-11-12 | 엘지디스플레이 주식회사 | Back Light Unit, Liquid Crystal Display Device and Driving Method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0934371A (en) * | 1995-07-17 | 1997-02-07 | Nichia Chem Ind Ltd | Led surface light source |
| JPH0992886A (en) * | 1995-09-26 | 1997-04-04 | Nichia Chem Ind Ltd | Led surface light source |
| US20030021099A1 (en) * | 2001-07-24 | 2003-01-30 | Minebea Co., Ltd. | Spread illuminating apparatus with plurality of light conductive bars |
| US20030123245A1 (en) * | 1995-06-27 | 2003-07-03 | Parker Jeffery R. | Light emitting panel assemblies |
| CN1504803A (en) * | 2002-11-29 | 2004-06-16 | 鸿富锦精密工业（深圳）有限公司 | Backlight source and liquid crystal display device |
-
2004
- 2004-11-24 CN CNB2004100524323A patent/CN100395615C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030123245A1 (en) * | 1995-06-27 | 2003-07-03 | Parker Jeffery R. | Light emitting panel assemblies |
| JPH0934371A (en) * | 1995-07-17 | 1997-02-07 | Nichia Chem Ind Ltd | Led surface light source |
| JPH0992886A (en) * | 1995-09-26 | 1997-04-04 | Nichia Chem Ind Ltd | Led surface light source |
| US20030021099A1 (en) * | 2001-07-24 | 2003-01-30 | Minebea Co., Ltd. | Spread illuminating apparatus with plurality of light conductive bars |
| CN1504803A (en) * | 2002-11-29 | 2004-06-16 | 鸿富锦精密工业（深圳）有限公司 | Backlight source and liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| CN1782798A (en) | 2006-06-07 |
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