CN1721936A - Light guide plate, module backlight and LCD - Google Patents
Light guide plate, module backlight and LCD Download PDFInfo
- Publication number
- CN1721936A CN1721936A CN 200410028192 CN200410028192A CN1721936A CN 1721936 A CN1721936 A CN 1721936A CN 200410028192 CN200410028192 CN 200410028192 CN 200410028192 A CN200410028192 A CN 200410028192A CN 1721936 A CN1721936 A CN 1721936A
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- Prior art keywords
- guide plate
- light guide
- holes
- incidence surface
- module backlight
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Abstract
A kind of LCD, comprise the two backlight modules of display panels, between this two display panels that are provided with relatively, this module backlight comprises a light guide plate and a light source, this light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, this two exiting surface is oppositely arranged, and comprises a plurality of holes in this light guide plate.Refraction and reflection take place in the light that light source sends at this hole place, finally penetrate from two relative exiting surfaces, thereby realize double-side.
Description
[technical field]
The present invention relates to module backlight, the LCD of a kind of light guide plate and this light guide plate of employing, relate in particular to a kind of module backlight, LCD that makes the light guide plate of the two-sided outgoing of light and adopt this light guide plate.
[background technology]
Because the liquid crystal itself in the panel of LCD does not have the characteristics of luminescence, therefore for reaching display effect, one light supply apparatus is provided must for the LCD panel, as module backlight, 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 module backlight, 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.
(Personal Digital Assistant PDA) waits in the electronic product, needs to realize the LCD of double-sided display in mobile phone, personal digital assistant.
A kind of prior art LCD as shown in Figure 1.This LCD 1 mainly comprises the electroluminescence part (Electroluminance of two film morphology, EL) 11,12, to provide two groups of display panels 13,14 required light respectively, like this, can make mobile phone or other use the inside and outside face of cover plate of the electronic product of this technology all to have LCDs.
Because LCD 1 needs to use two electroluminescence parts 11,12 with display panels 11,12 identical sizes, the cost of this LCD is higher.
In order to reduce cost, can use two groups of light guide plate instead and replace two electroluminescence parts, but the thickness of whole LCD is increased, and no matter use 11,12 or two groups of light guide plate of two electroluminescence parts, the higher and power consumption problem of higher of cost all can be arranged.
[summary of the invention]
For overcoming the defective that the prior art light guide plate can not make the two-sided outgoing of light, the invention provides a kind of light guide plate that makes the two-sided outgoing of light.
The present invention also provides a kind of module backlight that adopts above-mentioned light guide plate.
The invention provides a kind of LCD that adopts above-mentioned module backlight.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of light guide plate is provided, comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, these two exiting surfaces are oppositely arranged, and comprise a plurality of holes in this light guide plate.
This light guide plate is plate shaped light guide plate or wedge shape light guide plate.
These a plurality of holes are through holes.
These a plurality of holes are parallel to this incidence surface.
These a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface.
These a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
Another 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 a light source, this light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, and these two exiting surfaces are oppositely arranged, and comprise a plurality of holes in this light guide plate.
This light guide plate is plate shaped light guide plate or wedge shape light guide plate.
These a plurality of holes are through holes.
These a plurality of holes are parallel to this incidence surface.
These a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface.
These a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
The another technical scheme that technical solution problem of the present invention is adopted is: a kind of LCD is provided, it comprises the two backlight modules of display panels, between this two display panels that are provided with relatively, this module backlight comprises a light guide plate and a light source, this light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, these two exiting surfaces are oppositely arranged, and comprise a plurality of holes in this light guide plate.
This light guide plate is plate shaped light guide plate or wedge shape light guide plate.
These a plurality of holes are through holes.
These a plurality of holes are parallel to this incidence surface.
These a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface.
These a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
Compared with prior art, the invention has the beneficial effects as follows: light guide plate provided by the invention, because its inside is provided with a plurality of holes, in the module backlight that adopts this light guide plate, the light that light source sends is advanced in light guide plate, when arriving this hole, can take place repeatedly to reflect and reflect, light is penetrated to two relative exiting surfaces respectively, thereby can adopt a light guide plate and a light source to realize double-side, can reduce cost and power consumption.In addition, when these a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface; Perhaps these a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases, and its exiting surface can make that double-side is even and brightness is identical when parallel to each other.
Equally, adopt the LCD of this module backlight, also can realize double-sided display, can reduce cost and power consumption.When these a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface; Perhaps these a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases, and its exiting surface can make that two-sided uniformly light-emitting and brightness are identical when parallel to each other.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of prior art LCD.
Fig. 2 is the first embodiment diagrammatic cross-section of LCD of the present invention.
Fig. 3 is the schematic perspective view of light guide plate in the LCD shown in Figure 2.
Fig. 4 is the diagrammatic cross-section of light guide plate in the LCD shown in Figure 2.
Fig. 5 is the second embodiment diagrammatic cross-section of LCD of the present invention.
Fig. 6 is the 3rd an embodiment diagrammatic cross-section of LCD of the present invention.
Fig. 7 is the 4th an embodiment diagrammatic cross-section of LCD of the present invention.
[embodiment]
First embodiment of LCD of the present invention as shown in Figure 2, this LCD 2 comprises two display panels that are oppositely arranged 23,24 and the module backlight 25 between this two display panels 23,24, the light source reflecting housing 2520 that this module 25 backlight comprises a light guide plate 251, a light source 252, be complementary with light source 252, diffusion sheet 261 and 262 and brightening piece 2611,2612,2621,2622.
Please consulting Fig. 3 together, is the schematic perspective view of light guide plate 251.Wherein, light guide plate 251 comprise an incidence surface 2510, first exiting surface 2511 adjacent and second exiting surface 2512 with this incidence surface 2510, with incidence surface 2510, first exiting surface 2511 side 2513,2514 vertical with second exiting surface 2512 and with incidence surface 2510 opposed bottom surface 2515, wherein this first exiting surface 2511 is relative with second exiting surface 2512, and side 2513,2514 and bottom surface 2515 all are set to reflecting surface.
Be provided with a plurality of holes 2519 in this light guide plate 251, this a plurality of hole 2519 is parallel to each other and all parallel with incidence surface 2510, first exiting surface 2511, second exiting surface 2512, and its axis is in the same plane.These a plurality of holes 2519 are the identical right cylinders of cross-sectional area, and along away from the direction of incidence surface 2510 dense distribution gradually, promptly, near more apart from incidence surface 2510, this hole 2519 distributes sparse more, and is far away more apart from incidence surface 2510, and this hole 2519 distributes intensive more.
Be sequentially provided with diffusion sheet 261 and brightening piece 2611,2612 with first exiting surface, 2511 adjacent sides on the light guide plate 251.There are uniform V-arrangement or U-shaped groove (figure does not show) in brightening piece 2611 and 2612 surfaces, and the groove quadrature of two brightening pieces 2611,2612 is provided with.Light guide plate 251 and second exiting surface, 2512 adjacent sides are sequentially provided with diffusion sheet 262 and brightening piece 2621,2622.There are uniform V-arrangement or U-shaped groove (figure does not show) in brightening piece 2621,2622 surfaces, and the groove quadrature of two brightening pieces 2621,2622 is provided with.This light source 252 can adopt cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamp, CCFL), luminescent diode (Light-Emitting Diode, LED) or other light source.
Please consult Fig. 4 together, when LCD 2 work, the light that light source 252 sends directly or through light source reflecting housing 2520 reflections enters light guide plate 251.The light 31,32 that enters light guide plate 251 arrives hole 2519 places, refraction and reflection are taking place at the interface respectively, reflected light upwards penetrates from first exiting surface 2511 or second exiting surface 2512, refraction and reflex take place at another in refract light at the interface once more, light in advancing penetrates from first exiting surface 2511 and second exiting surface 2512 respectively through the refraction and the reflection of a plurality of curved interface.Because this hole 2519 is about plane symmetry, its symmetrical plane is positioned at the centre position of first exiting surface 2511 and second exiting surface 2512 and is parallel to first exiting surface 2511 and second exiting surface 2512, identical from first exiting surface 2511 with the luminance brightness that second exiting surface 2512 penetrates, through the diffusion of diffusion sheet 261,262 and the light harvesting effect of brightening piece 2611,2612,2621,2622, can obtain uniform light at first exiting surface 2511 and second exiting surface, 2512 places.
Compared with prior art, LCD 2 correspondingly only needs a light source 252 to satisfy the demand owing to only need a slice light guide plate 251 can realize the function of double-sided display, not only can reduce cost, and can reduce power consumption.These a plurality of hole 2519 cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface 2510, and its exiting surface 2511 and 2512 is parallel to each other, can make that two-sided uniformly light-emitting and brightness are identical.
Seeing also Fig. 5, is the diagrammatic cross-section of LCD second embodiment of the present invention.Be with the first embodiment LCD, 2 differences: in this LCD 5, a plurality of holes 5519 in the light guide plate 551 are evenly distributed, that is, no matter apart from incidence surface 5510 distances, these a plurality of hole 5519 spacings equate; But the cross-sectional area of these a plurality of holes 5519 varies in size, and is near more apart from incidence surface 5510, and the cross-sectional area of this hole 5519 is more little, far away more apart from incidence surface 5510, and the cross-sectional area of this hole 5519 is big more.
Seeing also Fig. 6, is the diagrammatic cross-section of LCD the 3rd embodiment of the present invention.Be with the first embodiment LCD, 2 differences: in this LCD 6, light guide plate 651 comprises two the first relative incidence surfaces 61 and second incidence surface 62, these a plurality of holes 6519 are along away from the direction of first incidence surface 61 and second incidence surface 62 dense distribution gradually, promptly, distance first incidence surface 61 and second incidence surface 62 are near more, this hole 5519 distributes sparse more, and distance first incidence surface 61 and second incidence surface 62 are far away more, and this hole 6519 distributes intensive more.
Seeing also Fig. 7, is the diagrammatic cross-section of LCD the 4th embodiment of the present invention.Be with the 3rd embodiment LCD 6 differences: in this LCD 7, a plurality of holes 7519 in the light guide plate 751 are evenly distributed, that is, no matter distance first incidence surface 71 and second incidence surface, 72 distances, these a plurality of hole 7519 spacings equate; But the cross-sectional area of these a plurality of holes 7519 varies in size, and distance first incidence surface 61 and second incidence surface 72 are near more, and the cross-sectional area of this hole 7519 is more little, and distance first incidence surface 71 and second incidence surface 72 are far away more, and the cross-sectional area of this hole 7519 is big more.
Compared with prior art, LCD 5,6,7 is because the variation in its mechanism, make light that light source sends through repeatedly reflect and reflect after penetrate from two exiting surfaces (indicating) respectively, through the diffusion of diffusion sheet and the light harvesting effect of brightening piece, can obtain uniform light at two exiting surface places.When these a plurality of hole cross-sectional sizes equate, and along with intensive with the increase of the distance of incidence surface; Perhaps these a plurality of hole cross-sectional sizes differences, and along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases, and its exiting surface can make that two-sided uniformly light-emitting and brightness are identical when parallel to each other.
In the LCD 2,5,6,7 of the present invention, this hole 2519,5519,6519 and 7519 can be filled and this light guide plate 251,551,651 and the different transparent medium of 751 refractive indexes.This light guide plate 251,551,651,751 can be plate shaped, wedge shape or other shapes.The shape of this hole 2519,5519,6519 and 7519 xsect can also be other arbitrary shapes such as quadrilateral, triangle, ellipse, the symmetric figure that is shaped as when this hole 2519,5519,6519 and 7519 xsects, and when its axis of symmetry is parallel to exiting surface and is positioned at two exiting surfaces centre, in this LCD 2,5,6,7, light guide plate 251,551,651 and 751 two exiting surfaces to go out light intensity identical.
This hole 2519,5519,6519 and 7519 can connect, and also can not connect; Its hole 2519,5519,6519 and 7519 direction can be parallel to incidence surface, also can be perpendicular to incidence surface.
Claims (24)
1. a light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, and these two exiting surfaces are oppositely arranged, and it is characterized in that: comprise a plurality of holes in this light guide plate.
2. light guide plate as claimed in claim 1 is characterized in that: this light guide plate is plate shaped light guide plate or wedge shape light guide plate.
3. light guide plate as claimed in claim 1 is characterized in that: these a plurality of holes are through holes.
4. light guide plate as claimed in claim 1 is characterized in that: these a plurality of holes are perpendicular to this incidence surface.
5. light guide plate as claimed in claim 1 is characterized in that: these a plurality of holes are parallel to this incidence surface.
6. light guide plate as claimed in claim 1 is characterized in that: these a plurality of hole cross-sectional sizes equate, these a plurality of holes are along with intensive with the increase of the distance of incidence surface.
7. light guide plate as claimed in claim 1 is characterized in that: these a plurality of hole cross-sectional sizes differences, these a plurality of holes along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
8. light guide plate as claimed in claim 1 is characterized in that: these a plurality of holes are symmetric figures.
9. light guide plate as claimed in claim 8 is characterized in that: the xsect of these a plurality of holes is circle, rhombus or ellipse.
10. a module backlight comprises a light guide plate and a light source, and this light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, and these two exiting surfaces are oppositely arranged, and it is characterized in that: comprise a plurality of holes in this light guide plate.
11. module backlight as claimed in claim 10 is characterized in that: this light source is light emitting diode or cold-cathode fluorescence lamp.
12. module backlight as claimed in claim 10 is characterized in that: these a plurality of holes are through holes.
13. module backlight as claimed in claim 10 is characterized in that: these a plurality of holes are perpendicular to this incidence surface.
14. module backlight as claimed in claim 10 is characterized in that: these a plurality of holes are parallel to this incidence surface.
15. module backlight as claimed in claim 10 is characterized in that: these a plurality of hole cross-sectional sizes equate, these a plurality of holes are along with intensive with the increase of the distance of incidence surface.
16. module backlight as claimed in claim 10 is characterized in that: these a plurality of hole cross-sectional sizes differences, these a plurality of holes along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
17. module backlight as claimed in claim 10 is characterized in that: this light guide plate is plate shaped light guide plate or wedge shape light guide plate.
18. module backlight as claimed in claim 10 is characterized in that: further comprise a diffusion sheet.
19. module backlight as claimed in claim 18 is characterized in that: further comprise a blast sheet.
20. module backlight as claimed in claim 10 is characterized in that: these a plurality of holes are symmetric figures.
21. module backlight as claimed in claim 20 is characterized in that: the xsect of these a plurality of holes is circle, rhombus or ellipse.
22. LCD, comprise the two backlight modules of display panels, between this two display panels that are provided with relatively, this module backlight comprises a light guide plate and a light source, this light guide plate comprises an incidence surface and two exiting surfaces adjacent with this incidence surface, these two exiting surfaces are oppositely arranged, and it is characterized in that: comprise a plurality of holes in this light guide plate.
23. LCD as claimed in claim 22 is characterized in that: these a plurality of hole cross-sectional sizes equate, these a plurality of holes are along with intensive with the increase of the distance of incidence surface.
24. LCD as claimed in claim 22 is characterized in that: these a plurality of hole cross-sectional sizes differences, these a plurality of holes along with the increase of the distance of incidence surface, the cross-sectional area of the hole of its relevant position increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410028192 CN1721936A (en) | 2004-07-16 | 2004-07-16 | Light guide plate, module backlight and LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410028192 CN1721936A (en) | 2004-07-16 | 2004-07-16 | Light guide plate, module backlight and LCD |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1721936A true CN1721936A (en) | 2006-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410028192 Pending CN1721936A (en) | 2004-07-16 | 2004-07-16 | Light guide plate, module backlight and LCD |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1721936A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279464A (en) * | 2014-09-16 | 2015-01-14 | 友达光电股份有限公司 | Double-sided backlight module |
| CN104536201A (en) * | 2014-12-26 | 2015-04-22 | 南京中电熊猫液晶显示科技有限公司 | Double-faced display and assembling method thereof |
| CN105223719A (en) * | 2015-10-19 | 2016-01-06 | 深圳市华星光电技术有限公司 | Double-sided liquid crystal display device and electronic equipment |
| CN106291799A (en) * | 2016-09-23 | 2017-01-04 | 京东方科技集团股份有限公司 | Light leading diaphragm and preparation method thereof and equipment, backlight module and display device |
| CN108828707A (en) * | 2018-06-06 | 2018-11-16 | 宇龙计算机通信科技(深圳)有限公司 | Light guide structure and terminal |
| CN111168226A (en) * | 2020-01-17 | 2020-05-19 | 合肥泰沃达智能装备有限公司 | Light guide plate mesh point processing device based on double rotating motors |
-
2004
- 2004-07-16 CN CN 200410028192 patent/CN1721936A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279464A (en) * | 2014-09-16 | 2015-01-14 | 友达光电股份有限公司 | Double-sided backlight module |
| CN104536201A (en) * | 2014-12-26 | 2015-04-22 | 南京中电熊猫液晶显示科技有限公司 | Double-faced display and assembling method thereof |
| CN105223719A (en) * | 2015-10-19 | 2016-01-06 | 深圳市华星光电技术有限公司 | Double-sided liquid crystal display device and electronic equipment |
| CN106291799A (en) * | 2016-09-23 | 2017-01-04 | 京东方科技集团股份有限公司 | Light leading diaphragm and preparation method thereof and equipment, backlight module and display device |
| CN106291799B (en) * | 2016-09-23 | 2019-11-01 | 京东方科技集团股份有限公司 | Light leading diaphragm and preparation method thereof and equipment, backlight module and display device |
| CN108828707A (en) * | 2018-06-06 | 2018-11-16 | 宇龙计算机通信科技(深圳)有限公司 | Light guide structure and terminal |
| CN111168226A (en) * | 2020-01-17 | 2020-05-19 | 合肥泰沃达智能装备有限公司 | Light guide plate mesh point processing device based on double rotating motors |
| CN111168226B (en) * | 2020-01-17 | 2022-04-08 | 合肥泰沃达智能装备有限公司 | Light guide plate mesh point processing device based on double rotating motors |
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