CN101165561B - Backlight module group and liquid crystal display device - Google Patents
Backlight module group and liquid crystal display device Download PDFInfo
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- CN101165561B CN101165561B CN200610063166A CN200610063166A CN101165561B CN 101165561 B CN101165561 B CN 101165561B CN 200610063166 A CN200610063166 A CN 200610063166A CN 200610063166 A CN200610063166 A CN 200610063166A CN 101165561 B CN101165561 B CN 101165561B
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Abstract
The invention comprises a light-guiding plate, a light source and an outer frame. Said light-guiding plate has a light emergence face, and light incidence face and multi side faces; said outer frame holds said light-guiding plate and the light source, and comprises multi side walls; said side walls faces the side face of the light guiding plate; between the light guiding face and its corresponded wall there is at least one colored reflection structure; the ray incident from the incident face of the light guiding plate is reflected via the colored reflection structure and is converted into the ray in preset color system.
Description
Technical field
The present invention is about a kind of module backlight and adopt the liquid crystal indicator of this module backlight.
Background technology
Liquid crystal indicator has characteristics such as low diathermaneity, compact and power consumption are low because of it, thus day by day extensive in the use, and along with the ripe and innovation of correlation technique, its kind is various day by day.LCD is as a kind of non-self-emission display apparatus, and it shows main by controlling passing through or the obstructed realization of coming of light beam that external light source sends, and therefore need additionally provide area source usually, as module backlight.This module backlight generally comprises light source and light guide plate, and the light beam that this light guide plate is sent light source is converted into required planar-light guide to the viewing area.
Operating voltage is low, luminosity is high, response speed is fast, the life-span is long because light emitting diode has, and makes in its module backlight that is widely used in mobile phone, PDA (personal digital assistant), display.
In the module backlight that utilizes light emitting diode as light source, because the light guide plate material is the clear, colorless material, therefore the chromaticity coordinates of module backlight is by the colour system decision of light emitting diode.If the light beam colour system purity that white light emitting diode sends is higher, could show white and other color that purity is higher during then via optical element and liquid crystal panel (having colored filter).If the light beam colour system purity sent of white light emitting diode is lower, as the yellow partially light beam of outgoing, it then shows white and other color of inclined to one side Huang during via optical element and liquid crystal panel.
In fact, the white light emitting diode technology also fails effectively its white light to be controlled in the higher ideal range of purity, promptly often presents inclined to one side yellow, thereby makes the inclined to one side yellow that presents backlight.But the user tends to display effect pure white or blue and white system usually, and therefore this module backlight can not reach common requirement.The conventional method that addresses this problem at present is as described below.
Seeing also Fig. 1, is the structural representation of a kind of prior art module backlight.This module 10 backlight comprises light source 12 and light guide plate 13.This light guide plate 13 comprises the exiting surface 132 that an incidence surface 131, links to each other with this incidence surface 131, and a bottom surface 133 relative with this exiting surface 132, and these light guide plate 13 inside are provided with the colored particle 130 of corresponding light source 12 colour systems.The incidence surface 131 of light source 12 relative light guide plate 13 is provided with, this light source 12 is a plurality of white light emitting diodes, after the white gold-tinted bundle partially of this light emitting diode emission enters light guide plate 13 by the incidence surface 131 of light guide plate 13, the white scattering of gold-tinted bundle colored particle 130 through light guide plate 13 in partially of part changes blue light beam into, and this blue light beam further is mixed into the higher white light beam of purity with the white inclined to one side gold-tinted bundle of not scattering.
But, this module 10 backlight need add scattering particle 130 in light guide plate 13, in light guide plate 13 injection molding processes, need increase by a shower nozzle simultaneously and spray scattering particle 130, and, make the manufacture method complexity spraying light guide plate 13 melted materials flow, the pressure and other parameters of these scattering particle 130 shower nozzles of synchro control simultaneously.And this scattering particle 130 has a chromatic dispersion material for what a certain size and shape arranged, and light guide plate 13 base materials are colourless transparent material, then owing to introduce other material in light guide plate 13 base materials, has influenced the intensity and the fiduciary level of light guide plate 13 itself.
Summary of the invention
Method for manufacturing light guide plate complexity and intensity and the relatively poor problem of fiduciary level for solving above-mentioned module backlight are necessary to provide a kind of manufacture method simple, can guarantee light guide plate intensity and fiduciary level again and can obtain the module backlight of predetermined colour system light beam.
Simultaneously, also be necessary to provide a kind of liquid crystal indicator that uses this module backlight.
A kind of module backlight, it comprises a light guide plate, a light source and a housing, this light guide plate has an exiting surface, incidence surface and an a plurality of side adjacent with this exiting surface.This light source this light guide plate incidence surface relatively is provided with.This housing is accommodated this light guide plate, and comprises a plurality of sidewalls, and corresponding with the side of this light guide plate.Wherein, this module backlight further comprises at least one painted reflection configuration, and this painted reflection configuration is between this light guide plate side and the corresponding sidewall of this housing.This painted reflection configuration includes painted reflecting material, the light beam that sends by this light source via this painted reflection configuration reflection after, be transformed into the light beam of predetermined colour system.
A kind of liquid crystal indicator, it comprises a display panels and a module backlight, this display panels and the stacked setting of this module backlight.Wherein, this module backlight comprises a light guide plate, a light source and a housing, and this light guide plate has an exiting surface, incidence surface and an a plurality of side adjacent with this exiting surface.This light source this light guide plate incidence surface relatively is provided with.This housing is accommodated this light guide plate, and comprises a plurality of sidewalls, and corresponding with the side of this light guide plate.Wherein, this module backlight further comprises at least one painted reflection configuration, this painted reflection configuration is between this light guide plate side and the corresponding sidewall of this housing, this painted reflection configuration includes painted reflecting material, the light beam that sends by this light source via this painted reflection configuration reflection after, be transformed into the light beam of predetermined colour system.
Compared with prior art, because above-mentioned module backlight and adopt this module liquid crystal indicator backlight to comprise to be arranged at least one painted reflection configuration between this light guide plate side and the corresponding side wall inner surfaces of this housing, after the light beam that this light source sends reflects via this painted reflection configuration, be transformed into the light beam of predetermined colour system.Simultaneously, need not to change general manufacture method and make manufacture method simple, also not in inner intensity and the fiduciary level of introducing other material and then having guaranteed light guide plate of light guide plate.
Description of drawings
Fig. 1 is the structural representation of a kind of prior art module backlight.
Fig. 2 is the structural representation of liquid crystal indicator first embodiment of the present invention.
Fig. 3 is the optical principle synoptic diagram of the painted reflecting material of liquid crystal indicator of the present invention.
Fig. 4 is the mixed light principle schematic of utilizing in the liquid crystal indicator of the present invention.
Fig. 5 is the local enlarged diagram of painted reflection configuration in the liquid crystal indicator of the present invention.
Fig. 6 is the structural representation of liquid crystal indicator second embodiment of the present invention.
Fig. 7 is the structural representation of liquid crystal indicator the 3rd embodiment of the present invention.
Embodiment
Seeing also Fig. 2, is the structural representation of liquid crystal indicator first embodiment of the present invention.This liquid crystal indicator 2 comprises a display panels 19 and a module 20 backlight, this display panels 19 and these module 20 superimposed settings backlight.
This module 20 backlight comprises a light source 23, a light guide plate 22 and a housing 24.This light guide plate 22 is a rectangular configuration, and it comprises an exiting surface 222, one and these exiting surface 222 vertical incidence surface that links to each other 221 and a plurality of sides 224.Further be provided with painted reflection configuration 220 on these a plurality of sides 224, this painted reflection configuration 220 is that painted reflecting material 2200 is attached directly on these a plurality of sides 224.Wherein, this painted reflecting material 2200 is blue paint, and the material of this light guide plate 22 is a methacrylic resin.This housing 24 comprises a plurality of sidewalls 244, and this light source 23 is a plurality of white light-emitting diodes, and its outgoing beam is white gold-tinted bundle 230 partially.This housing 24 is accommodated this light guide plate 22, and its sidewall 244 is corresponding one by one with the side 224 of light guide plate 22, and this light source 23 is oppositely arranged with the incidence surface 221 of this light guide plate 22.
Seeing also Fig. 3, is the optical principle synoptic diagram of the painted reflecting material of liquid crystal indicator of the present invention.This painted reflecting material 2200 can make incident beam 41 reflections of inciding itself, and makes this incident beam 41 become the folded light beam 42 with painted reflecting material 2200 intrinsic colours, and in the present embodiment, this folded light beam 42 is a blue light beam.
Seeing also Fig. 4, is the mixed light principle schematic of utilizing in the liquid crystal indicator of the present invention.Can synthesizing yellow light according to red light and green light, red light, green light and blue light can synthesize the principle of white light, and blue light beam 43 mixes with white gold-tinted bundle 44 partially, and last outgoing beam can be pure white light beam 45.
According to above-mentioned principle, after gold-tinted bundle 230 enters light guide plate 22 from this incidence surface 221 by this light source 23 outgoing white partially, the white gold-tinted bundle 230 partially of this painted reflection configuration 220 of directive is reflected and the painted blue light beam that becomes in the light guide plate 22, and this blue light beam further becomes pure white planar light beam 231 with white gold-tinted bundle 230 colour mixtures partially that reflect without this painted reflection configuration 220 and penetrated by exiting surface 222.
Because the setting of light source 23 relative light guide plate 22 is also asymmetric, light guide plate 22 is bright away from light source 23 1 sides relatively near light source 23 1 sides generally speaking, thus in the light guide plate 22 near incidence surface 221 1 sides to the also incomplete homogeneous of degree away from the Bai Pianhuang of incidence surface 221 1 sides.Painted reflecting material 2200 is controlled in this painted reflection configuration 220 in segmentation, and at least one character can these painted reflecting material 2200 catoptrical colour systems of segmentation control in density, thickness, reflectivity, tinctorial yield and the colour system of each position, can make the white yellow partially degree of each locational painted reflecting material 2200 and this zone light beam corresponding, the pure white planar light beam 231 that has good homogeneity with acquisition.
Seeing also Fig. 5, is the local enlarged diagram of painted reflection configuration in the liquid crystal indicator of the present invention.This painted reflecting material 2200 is bigger near light source 23 (figure a does not show) side density in these light guide plate 22 sides 224, and less away from these light source 23 1 side density in this side 224.Like this, the bigger side of painted reflecting material 2200 density is darker than the blue light that the less lateral reflection of density goes out, so can corresponding above-mentioned uneven white yellow light mix partially become even pure white light.
Compared to prior art, because the module backlight 20 of liquid crystal indicator 2 of the present invention has increased painted reflection configuration 220 on the side 224 of this light guide plate 22, make white gold-tinted bundle 230 parts partially of light source 23 outgoing be reflected and become blue light beam, this blue light beam further with the white gold-tinted bundle colour mixture partially that is not reflected, finally become pure white planar light beam 231 and penetrate, satisfied the needs of the pure white colour system of user by exiting surface 222.Simultaneously, the change of this light guide plate 22 only for to adhere to painted reflecting material 2200 on its side 224, be need not to change general manufacture method, so manufacture method is simple.And not at inner other material of introducing of light guide plate, guaranteed the intensity and the fiduciary level of light guide plate, also avoided influencing production capacity and production time.
In addition, segmentation is controlled in this painted reflection configuration 220 painted reflecting material 2200 at least one character in density, thickness, reflectivity, tinctorial yield and the colour system of each position and is come these painted reflecting material 2200 catoptrical colour systems of segmentation control, can make the pure white planar light beam 231 of outgoing even, and then can show purity is higher and uniformity coefficient is higher white and other color during via optical element and liquid crystal panel (having colored filter).
Seeing also Fig. 6, is the structural representation of liquid crystal indicator second embodiment of the present invention.The liquid crystal indicator 5 of present embodiment and the difference of first embodiment are: the painted reflection configuration 56 of this module 50 backlight is a film, between the sidewall 544 of these light guide plate 52 sides 524 and this housing 54.This film has painted reflecting material 560, and the colour system of this painted reflecting material 560 is red.The optical principle identical according to first embodiment, the white gold-tinted bundle partially 530 that is sent by this light source 53 cooperates red colored reflecting material 560, and the light beam that finally obtains orange colour system is penetrated by this exiting surface 522.
See also Fig. 7, be the structural representation of liquid crystal indicator the 3rd embodiment of the present invention. the liquid crystal indicator 6 of present embodiment is with the difference of first embodiment: the light guide plate 62 of this module 60 backlight also comprises a bottom surface 623 relative with this exiting surface 622, this housing 64 comprises that also backboard 642. this backlight modules 60 corresponding with this bottom surface 623 further comprise a reflecting plate 65, this reflecting plate 65 is between these light guide plate 62 bottom surfaces 623 and this backboard 642. and this painted reflection configuration 640 is between the sidewall 644 and light guide plate 62 corresponding side surface 624 of this housing 64, and between this reflecting plate 65 and light guide plate 62 bottom surfaces 623. and be that painted reflecting material 6400 directly is attached to sidewall 644 inboards of this housing 64 and this reflecting plate 65 towards light guide plate 62 bottom surfaces 623 1 sides in the present embodiment.
But liquid crystal indicator of the present invention is not limited to the described of above-mentioned embodiment.Wherein, light source also can be and sends light and fail to reach other desirable pure white light beam, as cold cathode fluorescent tube.The light beam that light source sends also can be other colour system, and as white blue partially, the painted reflecting material of its correspondence is yellow.This painted reflecting material also can be the material of other colour system, as green, to obtain the light beam of consumer premise colour system.This light guide plate material is the resin material with good light beam transmitance, as the thermoplastic resin of melting moulding such as polycarbonate, polystyrene, methyl methacrylate and cinnamic copolymer resin, noncrystalline cyclic olefin polymer, polypropylene, tygon, thermoplastics type's vibrin.In the 3rd embodiment, this reflecting plate can be structure as a whole with housing, this painted reflection configuration also can only be positioned at described position one of them.
Claims (9)
1. module backlight, it comprises a light guide plate, one light source and a housing, this light guide plate has an exiting surface, one incidence surface and a plurality of side adjacent with this exiting surface, contiguous this light guide plate incidence surface of this light source is provided with, this housing is accommodated this light guide plate and this light source, this housing comprises a plurality of sidewalls, and this sidewall is corresponding with the side of this light guide plate, it is characterized in that: this module backlight further comprises at least one painted reflection configuration, this painted reflection configuration between this light guide plate side and the corresponding sidewall of this housing, the light beam that sends by this light source via this painted reflection configuration reflection after, be transformed into the light beam of predetermined colour system.
2. module backlight as claimed in claim 1 is characterized in that: this painted reflection configuration comprises painted reflecting material.
3. module backlight as claimed in claim 2, it is characterized in that: this painted reflection configuration segmentation is controlled in density, thickness, reflectivity, tinctorial yield and the colour system of painted reflecting material on each position at least one character and is come segmentation to control the colour system of this painted reflecting material folded light beam, makes the outgoing beam colour system even.
4. module backlight as claimed in claim 2 is characterized in that: this light source emergent light is white gold-tinted bundle partially, and the painted reflecting material in this painted reflection configuration is that blueness is a reflecting material.
5. module backlight as claimed in claim 2 is characterized in that: this painted reflection configuration is for to be attached directly to painted reflecting material on this light guide plate side.
6. module backlight as claimed in claim 2 is characterized in that: this painted reflection configuration is for to be attached directly to painted reflecting material on this side wall inner surfaces.
7. module backlight as claimed in claim 1 is characterized in that: this painted reflection configuration is one to comprise the film of painted reflecting material, and this film is between this light guide plate side and the corresponding sidewall of this housing.
8. module backlight as claimed in claim 1 is characterized in that: this light guide plate further comprises a bottom surface, and this housing comprises a backboard, and this backboard is corresponding with this bottom surface, and this painted reflection configuration further is arranged between this bottom surface and this backboard.
9. liquid crystal indicator, it comprises a module backlight and a display panels, this display panels and the superimposed setting of this module backlight is characterized in that: this module backlight is the described module backlight of any claim item in 1 to 8 of the aforesaid right requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063166A CN101165561B (en) | 2006-10-18 | 2006-10-18 | Backlight module group and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063166A CN101165561B (en) | 2006-10-18 | 2006-10-18 | Backlight module group and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101165561A CN101165561A (en) | 2008-04-23 |
| CN101165561B true CN101165561B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610063166A Active CN101165561B (en) | 2006-10-18 | 2006-10-18 | Backlight module group and liquid crystal display device |
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| CN (1) | CN101165561B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650706A (en) * | 2012-03-09 | 2012-08-29 | 京东方科技集团股份有限公司 | Reflector plate and preparation method thereof, and backlight with reflector plate |
| CN102636825B (en) * | 2012-03-09 | 2015-01-07 | 京东方科技集团股份有限公司 | Method and system for manufacturing reflection diaphragm |
| CN105202424B (en) | 2015-10-29 | 2018-03-02 | 京东方光科技有限公司 | Back light unit and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588207A (en) * | 2004-06-30 | 2005-03-02 | 胜华科技股份有限公司 | Back light module with light source combination and back light color switching |
| CN1790125A (en) * | 2004-12-18 | 2006-06-21 | 群康科技(深圳)有限公司 | Backlight module assembly |
-
2006
- 2006-10-18 CN CN200610063166A patent/CN101165561B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1588207A (en) * | 2004-06-30 | 2005-03-02 | 胜华科技股份有限公司 | Back light module with light source combination and back light color switching |
| CN1790125A (en) * | 2004-12-18 | 2006-06-21 | 群康科技(深圳)有限公司 | Backlight module assembly |
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| Publication number | Publication date |
|---|---|
| CN101165561A (en) | 2008-04-23 |
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