CN100529894C - Backlight module and LCD device - Google Patents
Backlight module and LCD device Download PDFInfo
- Publication number
- CN100529894C CN100529894C CNB2005101017513A CN200510101751A CN100529894C CN 100529894 C CN100529894 C CN 100529894C CN B2005101017513 A CNB2005101017513 A CN B2005101017513A CN 200510101751 A CN200510101751 A CN 200510101751A CN 100529894 C CN100529894 C CN 100529894C
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- carinate
- light
- module backlight
- unitized
- guide plate
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Abstract
The invention relates to a backlight module pattern assembly and a liquid crystal display device. The backlight module pattern assembly includes: a light conducting board and at least one light source, the light conducting board contains at least one light-in surface and a floor connected with the light-in surface, the light source is set correspondingly with the light-in surface, several carinate unitized constructions are set on the floor and each of the carinate unitized constructions includes two different carinate constructions to astringe the angle of ray sent from the light conducting board. The backlight module pattern assembly of the constructions can improve the light-out brightness and increase the availability ratio of light.
Description
[technical field]
The present invention relates to a kind of module backlight and liquid crystal indicator.
[background technology]
Because the liquid crystal itself in the panel of LCD is not had a characteristics of luminescence, therefore for reaching display effect, need to give the LCD panel to provide a planar light source device to realize Presentation Function, as module backlight, its function is to provide the area source that brightness is abundant and be evenly distributed to display panels.Common module backlight mainly comprises light source and light guide plate, light source is the incidence surface setting of relative light guide plate, the transmission direction that light-guide plate guides is sent light beam from light source, the Beam Transformation that line source or pointolite are sent becomes comparatively uniform in-plane light outgoing to illuminate the display panels in the LCD.
A kind of liquid crystal indicator 2 of prior art can be with reference to Fig. 1, this liquid crystal indicator 2 comprises the liquid crystal panel 29 that relative this module 20 backlight with of a module 20 backlight is provided with, this module 20 backlight comprises a light guide plate 21, a light source 22 and a reflecting plate 23, this light guide plate 21 comprises at least one incidence surface 211, an exiting surface 213 and a bottom surface 212, this exiting surface 213 intersects with this incidence surface 211, this bottom surface 212 is relative with this exiting surface 213, and this bottom surface 212 is provided with the v-shaped structure 214 of a plurality of shape unanimities.This light source 22 is arranged on this incidence surface 211 1 sides, and these reflecting plate 23 relative these bottom surfaces 212 are provided with.
With reference to Fig. 2, be module part light path synoptic diagram backlight shown in Figure 1.The light that is sent by light source 22 among Fig. 2 reflects and refract to for more than 23 time through light guide plate 21 and reflecting plate and reaches exiting surface 213, is penetrated by light guide plate 21 by refraction.The v-shaped structure 214 of its bottom surface 212 difficult with light to penetrate perpendicular to exiting surface 213 directions.
With reference to Fig. 3, be the light guide plate bright dipping intensity distribution of module backlight shown in Figure 1.Light guide and this exiting surface 213 normal angulations that this horizontal ordinate representative is penetrated by exiting surface 213, ordinate is represented out light intensity, all light guides in the vertical plane of curve A 1 representative and this exiting surface 213 and this incidence surface 211 go out light intensity, curve B 1 representative is rotated counterclockwise the light intensity that of all light guides in the planes of 45 degree, the light intensity that of all light guides plane that turn 90 degrees in is revolved in curve C 1 representative successively, and curve D 1 is represented the light intensity that of all light guides in the plane that ROT13 5 spends.Light guide plate 21 bottom surfaces 212 are provided with a plurality of v-shaped structures 214 as seen from Figure 3, though can the convergent light rays angle of divergence, bright dipping intensity reaches maximal value basically about positive and negative 20 degree, numerical value approaches 7, but light guide plate 21 forwards (0 degree) emergent light intensity a little less than, numerical value is essentially 2, emergent light intensity descends significantly, and whole emergent light shape is concentrated, can't effectively restrain the light of left and right directions.
The v-shaped structure of general bottom surface 212 is difficult to be penetrated the light edge perpendicular to exiting surface 213 directions.The light guide plate 21 smooth convergences of this liquid crystal indicator 2 are relatively poor, and light utilization efficiency is low, and it can't satisfy the requirement of module 20 emitting brightness backlight.
[summary of the invention]
For overcoming the defective that the prior art light guide plate can't satisfy the requirement of module emitting brightness backlight, be necessary to provide a kind of module backlight that can improve module emitting brightness backlight.
For overcoming the defective that the prior art light guide plate can't satisfy the requirement of module emitting brightness backlight, be necessary to provide a kind of liquid crystal indicator that can improve module emitting brightness backlight.
A kind of module backlight, it comprises a light guide plate, a reflecting plate and at least one light source, this light guide plate comprises at least one incidence surface and one and this incidence surface bottom surface of intersecting, this light source this incidence surface relatively is provided with, this reflecting plate this bottom surface relatively is provided with, and wherein this bottom surface is provided with a plurality of carinate unitized constructions, and each carinate unitized construction comprises two different ridge-like structures, with the angle of convergence from the light of light guide plate ejaculation, this each carinate unitized construction is an axially symmetric structure.
A kind of liquid crystal indicator, it comprises a module backlight, this module backlight comprises a light guide plate, a reflecting plate and at least one light source, this light guide plate comprises at least one incidence surface and one and this incidence surface bottom surface of intersecting, this light source this incidence surface relatively is provided with, this reflecting plate this bottom surface relatively is provided with, wherein this bottom surface is provided with a plurality of carinate unitized constructions, each carinate unitized construction comprises two different ridge-like structures, with the angle of convergence from the light of light guide plate ejaculation, this each carinate unitized construction is an axially symmetric structure.
Compared with prior art, the bottom surface of the light guide plate of above-mentioned liquid crystal indicator and module backlight is provided with a plurality of carinate unitized constructions, its rising angle is significantly restrained, and the forward briliancy can not descend significantly, its whole angle to go out the light intensity homogeneity consistent, thereby can improve the module emitting brightness backlight of liquid crystal indicator, improve light utilization efficiency.
[description of drawings]
Fig. 1 is a kind of prior art liquid crystal indicator synoptic diagram.
Fig. 2 is the module part light path synoptic diagram backlight of liquid crystal indicator shown in Figure 1.
Fig. 3 is the light guide plate bright dipping intensity distribution of the module backlight of liquid crystal indicator shown in Figure 1.
Fig. 4 is the liquid crystal indicator first embodiment synoptic diagram of the present invention.
Fig. 5 is the module part light path synoptic diagram backlight of liquid crystal indicator shown in Figure 4.
Fig. 6 is the light guide plate bright dipping intensity distribution of the module backlight of liquid crystal indicator shown in Figure 4.
Fig. 7 is the liquid crystal indicator second embodiment synoptic diagram of the present invention.
Fig. 8 is liquid crystal indicator the 3rd an embodiment synoptic diagram of the present invention.
Fig. 9 is liquid crystal indicator the 4th an embodiment synoptic diagram of the present invention.
[embodiment]
With reference to Fig. 4, it is the liquid crystal indicator first embodiment synoptic diagram of the present invention, this liquid crystal indicator 3 comprises the liquid crystal panel 390 that relative this module 300 backlight with of a module 300 backlight is provided with, and this module 300 backlight comprises two light sources 30, a light guide plate 31 and a reflecting plate 32.
This light guide plate 31 comprises two relative incidence surfaces 310 and 311 in order to receive irradiating light beam, one exiting surfaces 312 that intersect with this incidence surface 310 and 311 and one and these exiting surface 312 opposed bottom surface 313, this bottom surface 313 is provided with a plurality of carinate unitized constructions 314, these a plurality of carinate unitized construction 314 relative these light guide plate 31 are the raised structures that outwards protrude, the degree of depth unanimity of these a plurality of carinate unitized constructions 314, these a plurality of carinate unitized constructions 314 are continuous distribution, each carinate unitized construction 314 shape unanimity, this each carinate unitized construction 314 is the W shape, it comprises two different ridge-like structures, each carinate unitized construction 314 all has three angles, wherein this two ridge-like structures angle is respectively α and γ, angle between two ridge-like structures is β, and α and γ are respectively greater than 13, this each carinate unitized construction 314 is an axially symmetric structure, and these a plurality of carinate unitized constructions 314 are uniformly distributed on the bottom surface, and are produced on the bottom surface 313 in the mode of icking tool or ejaculation.
These light source 30 relative these incidence surfaces 310 and 311 are provided with, and these reflecting plate 32 relative these bottom surfaces 313 are provided with.
With reference to Fig. 5, be module part light path synoptic diagram backlight shown in Figure 4.The light that is sent by light source 30 reflects and refract to for more than 32 time through light guide plate 31 and reflecting plate and reaches exiting surface 312, is penetrated by light guide plate 31 by refraction.The carinate unitized construction of its bottom surface 313 can restrain rising angle significantly, even has had part light to penetrate with vertical light guide plate 31 directions.
With reference to Fig. 6, be the light guide plate bright dipping intensity distribution of module backlight shown in Figure 4.This horizontal ordinate representative is by the light guide of exiting surface 312 ejaculations and the normal angulation of this exiting surface 312, ordinate is represented out light intensity, all light guides in the vertical plane of curve A 2 representative and this exiting surface 312 and this incidence surface 310,311 go out light intensity, curve B 2 representative is rotated counterclockwise the light intensity that of all light guides in the planes of 45 degree, the light intensity that of all light guides plane that turn 90 degrees in is revolved in curve C 2 representative successively, and curve D 2 is represented the light intensity that of all light guides in the plane that ROT13 5 spends.As seen from Figure 6 compared to a plurality of v-shaped structures are set at bottom surface of light guide plate, when light guide plate 31 bottom surfaces 313 are provided with a plurality of carinate unitized construction 314, but the convergent light rays angle of divergence, bright dipping intensity reaches maximal value basically about positive and negative 20 degree, numerical value approaches 7, light guide plate 31 forwards (0 degree) emergent light strength values is essentially 5, emergent light intensity can not decline to a great extent, and whole angle to go out the light intensity homogeneity consistent, thereby improve module emitting brightness backlight, improve light utilization efficiency, and it has reached suitable light convergence, therefore can reduce the use of brightening piece, reduce cost.
With reference to Fig. 7, it is the liquid crystal indicator second embodiment synoptic diagram of the present invention, this liquid crystal indicator 4 is with the difference of the liquid crystal indicator 3 of first embodiment: these a plurality of carinate unitized constructions 414 are spaced apart, these a plurality of carinate unitized constructions 414 are symmetrically distributed to the center by light guide plate 41 both sides, these a plurality of carinate unitized constructions 414 with away from light source by dredging to the solid matter row, thereby further improve the bright dipping briliancy and the uniformity coefficient of light guide plate 41.Two ridge-like structure shape differences of this each carinate unitized construction 414, and two ridge-like structures are asymmetric, but each ridge-like structure individual variation of this each carinate unitized construction 414 is controlled the light that is entered by both sides, compared to each single v-shaped structure, it is higher that it can change the parameter degree of freedom, the design optimization ability is stronger, more effectively optimal design.
With reference to Fig. 8, it is liquid crystal indicator the 3rd embodiment synoptic diagram of the present invention, this liquid crystal indicator 5 is with the difference of the liquid crystal indicator 4 of first embodiment: this module 500 backlight comprises a light source 50, this light guide plate 51 comprises an incidence surface 510, these a plurality of carinate unitized constructions 514 are with respect to the groove structure of this light guide plate 51 for inwardly concaving, these a plurality of carinate unitized constructions 514 are spaced apart, these a plurality of carinate unitized constructions 514 with away from light source 50 by dredging to the solid matter row, the degree of depth of these a plurality of carinate unitized constructions 514 is with deepening gradually away from light source 50.
With reference to Fig. 9, it is liquid crystal indicator the 4th embodiment synoptic diagram of the present invention, this liquid crystal indicator 6 is with the difference of the liquid crystal indicator 5 of first embodiment: these a plurality of carinate unitized constructions 614 are spaced apart, and the surface of these a plurality of carinate unitized constructions 614 is cambered surfaces.
Yet it is described that this liquid crystal indicator is not limited to above-mentioned embodiment, and for example, a plurality of carinate unitized construction of the light guide plate of this liquid crystal indicator can adopt continuous distribution, also can adopt spaced apart; Can form a reflection horizon at bottom surface of light guide plate, light guide plate can be gone into the beam reflection that penetrates bottom surface of light guide plate in this reflection horizon, further improves the briliancy of light guide plate exiting surface.
Claims (10)
1. module backlight, it comprises a light guide plate, a reflecting plate and at least one light source, this light guide plate comprises at least one incidence surface and one and this incidence surface bottom surface of intersecting, this light source this incidence surface relatively is provided with, this reflecting plate this bottom surface relatively is provided with, and it is characterized in that: this bottom surface is provided with a plurality of carinate unitized constructions, and each carinate unitized construction comprises two different ridge-like structures, with the angle of convergence from the light of light guide plate ejaculation, this each carinate unitized construction is an axially symmetric structure.
2. module backlight as claimed in claim 1 is characterized in that: the carinate unitized construction of being made up of two different ridge-like structures becomes the W shape.
3. module backlight as claimed in claim 2, it is characterized in that: this each carinate unitized construction all has three angles, wherein these two different ridge-like structure angles are respectively α and γ, and the angle between two different ridge-like structures is β, and α and γ are respectively greater than β.
4. module backlight as claimed in claim 1 is characterized in that: these a plurality of carinate unitized constructions are symmetrically distributed to the center by the light guide plate both sides.
5. module backlight as claimed in claim 1 is characterized in that: these a plurality of carinate unitized constructions are continuous distribution or are distributed in the bottom surface.
6. module backlight as claimed in claim 1 is characterized in that: this carinate unitized construction is raised structures or groove structure.
7. module backlight as claimed in claim 1 is characterized in that: the degree of depth of these a plurality of carinate unitized constructions is with deepening gradually away from incidence surface.
8. module backlight as claimed in claim 1 is characterized in that: these a plurality of carinate unitized constructions are with being listed as by dredging to solid matter away from incidence surface.
9. module backlight as claimed in claim 1 is characterized in that: the surface of these a plurality of carinate unitized constructions is a cambered surface.
10. liquid crystal indicator, it comprises a module backlight, this module backlight is the described module backlight of arbitrary claim in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101017513A CN100529894C (en) | 2005-11-24 | 2005-11-24 | Backlight module and LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101017513A CN100529894C (en) | 2005-11-24 | 2005-11-24 | Backlight module and LCD device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1971370A CN1971370A (en) | 2007-05-30 |
| CN100529894C true CN100529894C (en) | 2009-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101017513A Expired - Fee Related CN100529894C (en) | 2005-11-24 | 2005-11-24 | Backlight module and LCD device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100529894C (en) |
Families Citing this family (1)
| 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 |
-
2005
- 2005-11-24 CN CNB2005101017513A patent/CN100529894C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1971370A (en) | 2007-05-30 |
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