CN2862103Y - Backlight module unit - Google Patents
Backlight module unit Download PDFInfo
- Publication number
- CN2862103Y CN2862103Y CN 200520121159 CN200520121159U CN2862103Y CN 2862103 Y CN2862103 Y CN 2862103Y CN 200520121159 CN200520121159 CN 200520121159 CN 200520121159 U CN200520121159 U CN 200520121159U CN 2862103 Y CN2862103 Y CN 2862103Y
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- CN
- China
- Prior art keywords
- light
- light source
- module backlight
- guide plate
- mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model provides a backlight module, including two swtichable light source sets, which are polychromatic light mixed light source set and white light source set. The two light source sets can work separately or in combination. The liquid crystal display (LCD) device using the backlight module can switch different color range display modes. The LCD device using the polychromatic light mixed light source set can obtain better color saturation degree. The LCD device using the white light source set has relative low energy consumption. The LCD device using both of the light source sets can obtain high color saturation degree and high brightness.
Description
[technical field]
The utility model is about a kind of module backlight.
[background technology]
At present, because liquid crystal indicator has advantages such as low, the compact and low voltage drive of electrical power consumed, the liquid crystal indicator panel has been widely used in the display screen of mobile communication products such as palmtop computer and mobile phone.Yet the liquid crystal indicator panel of portable equipment is except basic demands such as light, thin, power saving, and along with the development gradually of multimedia application, the consumer begins the existing more harsh requirement of counter plate color table.
In the prior art, utilize the red, green, blue Tricolor LED to do mixed light sources and can obtain preferable color saturation, but because present lumination of light emitting diode efficient does not reach the luminosity (30-60lumen/Watt) of cathode fluorescent tube yet, therefore under the common product brightness requirement, certainly will need to use many light emitting diode, so just have a strong impact on the portable set display panels and satisfy power saving and the long product needed of stand-by time.
[utility model content]
Can not to satisfy color saturation simultaneously good in order to solve liquid crystal indicator of the prior art, and the low problem of energy consumption, is necessary to provide a kind of can making to adopt its liquid crystal indicator to satisfy the module backlight that color saturation is good and energy consumption is low simultaneously.
A kind of module backlight, it comprises two switchable light sources, this two light sources is respectively polychromatic light mixed light sources group and white light source group.
Compared to prior art, two light sources of this module backlight can independently or make up running, make the changeable different colour gamut expression modes of liquid crystal indicator that adopt this module backlight, can obtain preferable color saturation when adopting the polychromatic light mixed light sources, then have than low energy consumption when adopting white light source, adopt this two light sources then can obtain high color saturation and high briliancy simultaneously simultaneously.
[description of drawings]
Fig. 1 is the utility model liquid crystal indicator first embodiment structural representation.
Fig. 2 is the utility model liquid crystal indicator second embodiment structural representation.
Fig. 3 is the utility model liquid crystal indicator the 3rd embodiment structural representation.
Fig. 4 is that the secondary light source of module backlight shown in Figure 3 is arranged at the synoptic diagram on the reflector plate.
[embodiment]
The utility model liquid crystal indicator first embodiment as shown in Figure 1, this liquid crystal indicator 10 comprises a display panels 11 and one and the module backlight 12 of these display panels 11 stacked settings.
This module 12 backlight comprises a blast sheet 13, a diffusion sheet 14, one first light guide plate 15, one second light guide plate 16, a reflector plate 17, one first light source 18 and a secondary light source 19.Wherein, this blast sheet 13, diffusion sheet 14, first light guide plate 15, second light guide plate 16 and the 17 stacked settings of this reflector plate, these first light source, 18 contiguous these first light guide plate, 15 1 side settings, these secondary light source 19 contiguous these second light guide plate, 16 1 side settings.
This first light guide plate 15 is first light sources with this first light source 18.This light guide plate 15 comprises an incidence surface 151 and an exiting surface 152.When lighting this first light source 18, its light beam that sends is through 151 incidents of light guide plate 15 incidence surfaces, light beam is in light guide plate 15 internal communications, segment beam is through exiting surface 152 direct outgoing, segment beam is incident to reflector plate 17 through second light guide plate 16, after sheet 17 reflection that is reflected once more through second light guide plate 16, first light guide plate 15 and from 152 outgoing of first light guide plate, 15 exiting surfaces.Behind diffusion sheet 14, blast sheet 13 optically focused, illuminate this display panels 11 from the light beam of exiting surface 152 outgoing.
This first light source 18 is cathode fluorescent tubes, and it is the common white radiant, and the white light beam of being sent is by electron excitation lamp tube wall fluorescent powder gained.This kind technology is comparatively ripe, and under the situation of set brightness, the cathode fluorescent tube of this first light source 18 is lower than polychromatic light mixed light sources energy consumption.
This second light guide plate 16 is the secondary light source group with this secondary light source 19.This light guide plate 16 comprises an incidence surface 161 and an exiting surface 162.When lighting this secondary light source 19, its light beam that sends is through 161 incidents of light guide plate 16 incidence surfaces, light beam is in light guide plate 16 internal communications, segment beam is through exiting surface 162 direct outgoing, segment beam is incident to reflector plate 17, after sheet 17 reflection that is reflected once more through second light guide plate 16 and from exiting surface 162 outgoing.Behind first light guide plate 15, diffusion sheet 14, blast sheet 13 optically focused, illuminate this display panels 11 from the light beam of exiting surface 162 outgoing.
This secondary light source 19 comprises a plurality of mixed light light emitting diodes, and each mixed light light emitting diode is four die package, and it comprises a red light-emitting diode crystal grain, two green light LED crystal grain and a blue light-emitting diode crystal grain.This mixed light light emitting diode is the polychromatic light mixed light sources, and the white light beam that it sent is by four luminous mixing of LED crystal particle, has preferable color saturation.Because of lumination of light emitting diode efficient still has to be hoistedly, so this secondary light source 19 is than white light source energy consumption height.
This first, second light sources can independently or make up running in response to the display mode of liquid crystal indicator 10, for this liquid crystal indicator 10 provides required light source.
When this liquid crystal indicator 10 was in the document tupe, first light source 18 that this module 12 backlight can only be lighted first light sources illuminated this liquid crystal indicator 10.The white light beam that this first light source 18 sends produces by excitated fluorescent powder, and is therefore less with the spectrum component of green glow part at ruddiness, color reprodubility deficiency when causing red, the green picture of these liquid crystal indicator 10 demonstrations.This kind pattern is applicable to goes out and uses when not needing very good color representation, therefore provides backlight with the first lower light sources of energy consumption, reaches power saving and has the purpose of longer stand-by time.
When this liquid crystal indicator 10 was in the multimedia recreation pattern, this module 12 backlight can be closed first light source 18, switched to the secondary light source 19 that utilizes the polychromatic light mixed light and illuminated this liquid crystal indicator 10.The white light beam that this secondary light source 19 sends is to be mixed by each light beam of red, green, blue, has preferable color saturation.This kind pattern is suitable for this liquid crystal indicator 10 under indoor use power lead electric power thus supplied, uses when doing multimedia application and needing the picture displayed color saturation high.
When this liquid crystal indicator 10 was in the multimedia recreation pattern and needs high brightness, this module 12 backlight can be lighted this first light source 18 simultaneously and this secondary light source 19 illuminates this liquid crystal indicator 10.This kind pattern be suitable for this liquid crystal indicator 10 in indoor by the power lead electric power thus supplied under, do when multimedia application needs high color saturation and high briliancy and use.
The module backlight 12 of this liquid crystal indicator 10 comprises two changeable light sources, selects to use this two light sources can satisfy the demand of user's different work situation.
Above-mentioned first light source 18 is a white light source, and it is not limited to cathode fluorescent tube, also can add the pointolite of yellow fluorescent powder for blue light-emitting diode.
Above-mentioned secondary light source 19 is the polychromatic light mixed light sources, this mixed light light emitting diode is not limited to four die package, also can be three die package or six color contamination light-emitting diode light sources, general three die package light emitting diodes comprise a red light-emitting diode crystal grain, a green light LED crystal grain and a blue light-emitting diode crystal grain.This polychromatic light mixed light sources is not limited to multi-color LED, also can be red, green, blue three fluorescence fluorescent tube mixed light sources.
See also Fig. 2, it is the structural representation of the utility model liquid crystal indicator second embodiment, and liquid crystal indicator 20 is with liquid crystal indicator 10 differences: liquid crystal indicator 20 only comprises a light guide plate 25, and it is plate entity.This light guide plate 25 comprises that two incidence surfaces that are provided with relatively, 251,253, the first light sources, 28 contiguous incidence surfaces 251 are provided with, and secondary light source 29 contiguous incidence surfaces 253 are provided with.Wherein, this first light source 28 is a white light source, and it can be cathode fluorescent tube, and this secondary light source 29 is the polychromatic light mixed light sources, and it can be the multi-color LED mixed light sources.
In the present embodiment, this first, second light source 28,29 of changeable employing is to satisfy the demand of user's different work situation.
In the above-mentioned liquid crystal indicator 20, the position that first, second light source 28,29 is set is not limited to light guide plate 25 both sides, also can be side by side or upper and lower arrangement be arranged at light guide plate 25 1 sides.
See also Fig. 3, it is the structural representation of the utility model liquid crystal indicator the 3rd embodiment.Liquid crystal indicator 30 is with liquid crystal indicator 10 differences: liquid crystal indicator 30 comprises a direct-type backlight module 32.Module 32 backlight comprises blast sheet 33, diffusion sheet 34, first light source 38, secondary light source 39 and the reflector plate 37 of stacked setting.
This first light source 38 comprises a plurality of cathode fluorescent tubes that are arranged in parallel, and it is the common white radiant.This secondary light source 39 comprises the mixed light light emitting diode (as shown in Figure 4) that a plurality of matrix forms are arranged, each mixed light light emitting diode is four die package, and it comprises a red light-emitting diode crystal grain, two green light LED crystal grain and a blue light-emitting diode crystal grain.The led layers of the cathode fluorescent tube of this first light source 38 and this secondary light source 39 overlaps wrong the arrangement.
Module backlight 32 light sources 38, the 39 changeable uses of this liquid crystal indicator 30 select to use this two light source can satisfy the demand of user's different work situation.
In the above-mentioned liquid crystal indicator 30, the position that this first, second light source 38,39 is set is not limited to stacked being arranged between diffusion sheet 34 and the reflector plate 37, and this first, second light source 38,39 also can be staggered with layer.
Claims (10)
1. module backlight, it is characterized in that: this module backlight comprises two changeable light sources, this two light sources is respectively white light source group and polychromatic light mixed light sources group.
2. module backlight as claimed in claim 1 is characterized in that: this white light source group comprises a light guide plate and first light source, and this light guide plate comprises an incidence surface, and contiguous this light guide plate incidence surface of this first light source is provided with.
3. module backlight as claimed in claim 2 is characterized in that: this first light source is that cathode fluorescent tube or blue light-emitting diode add one of yellow fluorescent powder.
4. module backlight as claimed in claim 1 is characterized in that: this polychromatic light mixed light sources group comprises a light guide plate and secondary light source, and this light guide plate comprises an incidence surface, and contiguous this light guide plate incidence surface of this secondary light source is provided with.
5. module backlight as claimed in claim 4 is characterized in that: this secondary light source comprises at least one mixed light light emitting diode.
6. module backlight as claimed in claim 5 is characterized in that: this mixed light light emitting diode is four die package, and it comprises a red light-emitting diode crystal grain, two green light LED crystal grain and a blue light-emitting diode crystal grain.
7. module backlight as claimed in claim 1 is characterized in that: this module backlight further comprises the diffusion sheet and the reflector plate of stacked setting, and this two light sources is arranged between this diffusion sheet and the reflector plate.
8. module backlight as claimed in claim 7 is characterized in that: this white light source group comprises a plurality of cold-cathode fluorescence lamp light pipes that are arranged in parallel.
9. module backlight as claimed in claim 8 is characterized in that: this polychromatic light mixed light sources comprises a plurality of mixed light light emitting diodes that matrix form is arranged.
10. module backlight as claimed in claim 9 is characterized in that: this cathode fluorescent tube and this led layers overlap wrong the setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520121159 CN2862103Y (en) | 2005-12-23 | 2005-12-23 | Backlight module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520121159 CN2862103Y (en) | 2005-12-23 | 2005-12-23 | Backlight module unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862103Y true CN2862103Y (en) | 2007-01-24 |
Family
ID=37659735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520121159 Expired - Lifetime CN2862103Y (en) | 2005-12-23 | 2005-12-23 | Backlight module unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2862103Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865746A (en) * | 2015-04-21 | 2015-08-26 | 友达光电股份有限公司 | Backlight module with light-emitting mode switching design and display module using same |
| CN104930411A (en) * | 2015-06-30 | 2015-09-23 | 京东方科技集团股份有限公司 | Backlight source module |
| CN105572969A (en) * | 2016-01-04 | 2016-05-11 | 京东方科技集团股份有限公司 | Self-light-emitting module and display device |
| CN117031826A (en) * | 2023-08-30 | 2023-11-10 | 惠科股份有限公司 | Backlight module and display device |
-
2005
- 2005-12-23 CN CN 200520121159 patent/CN2862103Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865746A (en) * | 2015-04-21 | 2015-08-26 | 友达光电股份有限公司 | Backlight module with light-emitting mode switching design and display module using same |
| CN104865746B (en) * | 2015-04-21 | 2018-02-02 | 友达光电股份有限公司 | Backlight module with light-emitting mode switching design and display module using same |
| CN104930411A (en) * | 2015-06-30 | 2015-09-23 | 京东方科技集团股份有限公司 | Backlight source module |
| CN104930411B (en) * | 2015-06-30 | 2017-10-10 | 京东方科技集团股份有限公司 | A kind of backlight source module |
| CN105572969A (en) * | 2016-01-04 | 2016-05-11 | 京东方科技集团股份有限公司 | Self-light-emitting module and display device |
| CN117031826A (en) * | 2023-08-30 | 2023-11-10 | 惠科股份有限公司 | Backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070124 |
|
| EXPY | Termination of patent right or utility model |