CN100405158C - Light guide device and backlight module - Google Patents
Light guide device and backlight module Download PDFInfo
- Publication number
- CN100405158C CN100405158C CNB2004100513460A CN200410051346A CN100405158C CN 100405158 C CN100405158 C CN 100405158C CN B2004100513460 A CNB2004100513460 A CN B2004100513460A CN 200410051346 A CN200410051346 A CN 200410051346A CN 100405158 C CN100405158 C CN 100405158C
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- CN
- China
- Prior art keywords
- light guide
- guide plate
- guiding device
- plate
- backlight module
- Prior art date
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Abstract
The present invention discloses a light guide device which comprises a light guide plate and a reflecting sheet, wherein the light guide plate comprises at least a light incident surface and two corresponding light exit surfaces adjacent to the light incident surface; the reflecting sheet is arranged in the light guide plate and between the two light exit surfaces and tightly combined with the light guide plate. The present invention also provides a backlight module using the light guide device.
Description
[technical field]
The invention relates to a kind of guiding device and adopt the backlight module of this guiding device, particularly about a kind of can two-sided bright dipping guiding device and adopt the backlight module of this guiding device.
[background technology]
Because the liquid crystal itself in the panel of LCD is not had a characteristics of luminescence, for reaching display effect, one light supply apparatus is provided must for the LCD panel, as backlight module, its function is to provide the area source that brightness is abundant and be evenly distributed to panel of LCD.Light guide plate is the key component of backlight module, and it must possess the good optical design, and the light that makes light guide plate can guide light source to send converts brightness to and colourity all can reach necessarily required area source.
A kind of double-side light guide plate 1 of prior art, as shown in Figure 1, be exposed in the 552nd of bulletin on September 11st, 2003, No. 439 TaiWan, China patents, this light guide plate 1 comprises an incidence surface (figure does not show) and the exiting surface 12 that intersects with this incidence surface, 13, this light guide plate 1 medium dip is distributed with a plurality of separated part 14, respectively the direction that tilts of this separated part 14 is to be extended away from one side of incidence surface to another exiting surface 12 by incidence surface and an adjacent edge of an exiting surface 13 wherein, and each separated part 14 has two parting planes 141 respectively, 142, and the parting plane 141 of these separated part 14 contiguous these incidence surfaces is to be the shape of protruding towards this incidence surface.When the light of light source (figure does not show) enters the parting plane 141 of each separated part 14 in the light guide plate 1 by the incidence surface projection, because parting plane 141 is the arcuations that are protrusion, therefore, can produce a reflected light and the refract light towards exiting surface 13 towards exiting surface 12, certainly, this refract light still can constantly produce reflected light and refract light in 141,142 projections of two parting planes of separated part 14, and these reflected light and refract light finally all can penetrate towards exiting surface 12 or exiting surface 13.
But be not difficult to find out that above-mentioned light guide plate 1 has following defective: its complex structure, and the ejaculation light of first exiting surface 12 and second exiting surface 13 distributes with the material of separated part 14 is different a bigger variation, causes first exiting surface 12 and second exiting surface, 13 emitting brightness to have than big difference.
[summary of the invention]
For overcoming existing light conducting plate structure complexity, defective that the double-side difference in brightness is bigger, the invention provides a kind of simple in structure, guiding device that double-side brightness is identical.
The present invention also provides a kind of simple in structure, backlight module that double-side brightness is identical.
The technical scheme of technical solution problem of the present invention is: a kind of guiding device is provided, it comprises a light guide plate and a reflector plate, this light guide plate comprises at least one incidence surface and two relative exiting surfaces, these two exiting surfaces are adjacent with this at least one incidence surface, wherein, this reflector plate is arranged in this light guide plate and combines closely between two exiting surfaces and with this light guide plate.
The present invention also provides a kind of backlight module, it comprises a guiding device and at least one light source, this guiding device comprises a light guide plate and a reflector plate, this light guide plate comprises at least one incidence surface and two relative exiting surfaces, these two exiting surfaces are adjacent with this at least one incidence surface, wherein, this reflector plate is arranged in this light guide plate and combines closely between two exiting surfaces and with this light guide plate; This at least one light source is at least one incidence surface setting of this light guide plate relatively.
Compared to prior art, the invention has the beneficial effects as follows: guiding device of the present invention is that a reflector plate is set in the middle of light guide plate, the light guide plate that only needs on the processing procedure to form desired thickness respectively in this reflector plate upper and lower surface gets final product, simple and this guiding device structure of processing procedure also obtains simplifying, in addition, because this reflector plate upper and lower surface structures is identical, and light source is arranged on this reflector plate sidepiece, therefore the incident light that sends by the light guide plate incidence surface two exiting surfaces of light guide plate that will evenly lead, and then realize the identical effect of double-side brightness.
[description of drawings]
Fig. 1 is the floor map of prior art light guide plate.
Fig. 2 is the floor map of guiding device first embodiment of the present invention.
Fig. 3 is the floor map of guiding device second embodiment of the present invention.
Fig. 4 is the floor map of backlight module first embodiment of the present invention.
[embodiment]
Seeing also Fig. 2, is the floor map of guiding device first embodiment of the present invention.This guiding device 2 comprises a light guide plate 21 and a reflector plate 20.This light guide plate 21 comprises at least one incidence surface 211 and two relative exiting surfaces 212,213, and at least one incidence surface of these two exiting surfaces 212,213 and this 211 is adjacent.It is interior between two exiting surfaces 212,213 that this reflector plate 20 is arranged on this light guide plate 21, and combine closely with this light guide plate 21.The upper and lower surface 201,202 of this reflector plate 20 is evenly distributed with circular shaped lattice point 203.This light guide plate 21 is plate shaped, in the middle of the above-mentioned light guide plate 21 reflector plate 20 is set, and this reflector plate 20 is one-body molded, simple in structure with this light guide plate 21.This reflector plate 20 is divided into two parts up and down with light guide plate 21, its two parts up and down of light guide plate 21 that light evenly can be led respectively, and then realize the identical effect of light guide plate 21 exiting surfaces, 212,213 luminosity.
Seeing also Fig. 3, is the floor map of guiding device second embodiment of the present invention.This guiding device 3 comprises a light guide plate 31 and a reflector plate 30.This light guide plate 31 comprises at least one incidence surface 311 and two relative exiting surfaces 312,313, and at least one incidence surface of these two exiting surfaces 312,313 and this 301 is adjacent.It is interior between two exiting surfaces 312,313 that this reflector plate 30 is arranged on this light guide plate 31, and combine closely with this light guide plate 31.The surface 301 of this reflector plate 30 is evenly distributed with circular shaped lattice point 303.Another 302 on surface of this reflector plate 30 is evenly distributed with circular shaped lattice point 303 in the bright dipping zone, and this light guide plate 31 be plate shaped, in the middle of the above-mentioned light guide plate 31 one deck reflector plates 30 is set, and this reflector plate 30 and this light guide plate 31 are one-body molded, simple in structure.This reflector plate 30 is divided into two parts up and down with light guide plate 31, its two parts up and down of light guide plate 31 that light evenly can be led respectively, and then realize the identical effect of light guide plate 31 exiting surfaces, 312,313 luminosity.
In addition, above-mentioned guiding device structure is not limited thereto, and wherein this light guide plate also can be wedge shape or arc, and this site also can be rhombus or ellipse.
Seeing also Fig. 4, is the floor map of backlight module of the present invention.This backlight module 400 comprises an above-mentioned guiding device 2, a light source 41 and two diffusion sheets 42,43.This light source 41 is positioned at light guide plate 21 incidence surfaces 211 1 sides, and diffusion sheet 42,43 lays respectively at light guide plate 21 exiting surfaces 211,212 1 sides.One deck reflector plate 20 is set in the middle of the light guide plate 21, and this reflector plate 20 is one-body molded, simple in structure with this light guide plate 21.This reflector plate 20 is divided into two parts up and down with light guide plate 21, two parts up and down of the even respectively guiding light guide plate 21 of its light that light source 41 can be sent, make light guide plate 21 double-side brightness identical, and then realize leading the identical effect of backlight module 400 exiting surfaces, 212,213 luminosity.
In addition, above-mentioned backlight modular structure is not limited thereto, and wherein this light guide plate also can be wedge shape or arc, and this site also can be rhombus or ellipse, and this light source can be cold cathode fluorescent lamp or light emitting diode.
Claims (14)
1. guiding device, it comprises a light guide plate, this light guide plate comprises at least one incidence surface, two relative exiting surfaces, these two exiting surfaces are adjacent with this at least one incidence surface, it is characterized in that: this guiding device also comprises a reflector plate, and it is arranged in this light guide plate and combines closely between two exiting surfaces and with this light guide plate.
2. guiding device as claimed in claim 1 is characterized in that: this reflector plate is positioned at two exiting surface central authorities of this light guide plate.
3. guiding device as claimed in claim 1 is characterized in that: this reflector plate and this light guide plate are one-body molded.
4. guiding device as claimed in claim 1 is characterized in that: this light guide plate is plate shaped or wedge shape.
5. guiding device as claimed in claim 1 is characterized in that: the two-sided site that all is provided with of this reflector plate.
6. guiding device as claimed in claim 5 is characterized in that: a surface of this reflector plate all is provided with the site, and another surface only subregion is provided with the site.
7. guiding device as claimed in claim 5 is characterized in that: this site is circle, rhombus or ellipse.
8. backlight module, it comprises a guiding device and at least one light source, this guiding device comprises a light guide plate, this light guide plate comprises at least one incidence surface, two relative exiting surfaces, these two exiting surfaces are adjacent with this at least one incidence surface, this at least one light source is at least one incidence surface setting of this light guide plate relatively, and it is characterized in that: this guiding device also comprises a reflector plate, and it is arranged in this light guide plate and combines closely between two exiting surfaces and with this light guide plate.
9. backlight module as claimed in claim 8 is characterized in that: this reflector plate and this light guide plate are one-body molded.
10. backlight module as claimed in claim 8 is characterized in that: this light guide plate is plate shaped or wedge shape.
11. backlight module as claimed in claim 8 is characterized in that: the two-sided site that all is provided with of this reflector plate wherein.
12. backlight module as claimed in claim 11 is characterized in that: a surface of this reflector plate all is provided with the site, and another surface only subregion is provided with the site.
13. backlight module as claimed in claim 11 is characterized in that: this site can be circle, rhombus or ellipse.
14. backlight module as claimed in claim 11 is characterized in that: this at least one light source is cold cathode fluorescent lamp or light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100513460A CN100405158C (en) | 2004-08-31 | 2004-08-31 | Light guide device and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100513460A CN100405158C (en) | 2004-08-31 | 2004-08-31 | Light guide device and backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743910A CN1743910A (en) | 2006-03-08 |
| CN100405158C true CN100405158C (en) | 2008-07-23 |
Family
ID=36139348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100513460A Expired - Fee Related CN100405158C (en) | 2004-08-31 | 2004-08-31 | Light guide device and backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100405158C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020033916A1 (en) * | 2000-02-14 | 2002-03-21 | Seiji Umemoto | Reflector and liquid-crystal display device |
| JP2003066444A (en) * | 2001-08-22 | 2003-03-05 | Nitto Denko Corp | Liquid crystal display device |
| CN1485658A (en) * | 2002-09-23 | 2004-03-31 | 胜华科技股份有限公司 | A double-faced light guiding plate and LCD having the same |
| CN1499250A (en) * | 2002-10-24 | 2004-05-26 | ������������ʽ���� | Dual-side lighting LCD module |
| JP2004199028A (en) * | 2002-10-24 | 2004-07-15 | Seiko Epson Corp | Display device and electronic equipment |
-
2004
- 2004-08-31 CN CNB2004100513460A patent/CN100405158C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020033916A1 (en) * | 2000-02-14 | 2002-03-21 | Seiji Umemoto | Reflector and liquid-crystal display device |
| JP2003066444A (en) * | 2001-08-22 | 2003-03-05 | Nitto Denko Corp | Liquid crystal display device |
| CN1485658A (en) * | 2002-09-23 | 2004-03-31 | 胜华科技股份有限公司 | A double-faced light guiding plate and LCD having the same |
| CN1499250A (en) * | 2002-10-24 | 2004-05-26 | ������������ʽ���� | Dual-side lighting LCD module |
| JP2004199028A (en) * | 2002-10-24 | 2004-07-15 | Seiko Epson Corp | Display device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1743910A (en) | 2006-03-08 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080723 Termination date: 20170831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |