CN103175032A - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
- Publication number
- CN103175032A CN103175032A CN2013100907048A CN201310090704A CN103175032A CN 103175032 A CN103175032 A CN 103175032A CN 2013100907048 A CN2013100907048 A CN 2013100907048A CN 201310090704 A CN201310090704 A CN 201310090704A CN 103175032 A CN103175032 A CN 103175032A
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- CN
- China
- Prior art keywords
- optics
- light
- light source
- backlight
- pellicle mirror
- 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.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight source and a display device, and belongs to the technical field of liquid crystal display. The backlight source comprises an optic module and a light source assembly which is arranged on the side edge of the optic module. The light source assembly comprises a light source, a first optic device, and a second optic device, wherein the first optic device is used for converting light emitted by the light source into parallel light and enabling the parallel light to be transmitted to the second optic device, and the second optic device is used for reflecting the parallel light transmitted by the first optic device to the optic module. The backlight source can largely reduce the use number of light-emitting diode (LED) lamps, improves use ratio of backlight, and saves cost. The display device comprises the backlight source, and therefore picture light intensity and picture evenness are largely improved.
Description
Technical field
The invention belongs to technical field of liquid crystal display, be specifically related to a kind of backlight and display unit.
Background technology
Liquid crystal display mainly is comprised of display panels and backlight.Because display panels itself is not luminous, so imaging needs another vital part--backlight.Backlight is the direct factor that can determine screen image quality except display floater.The characteristics of luminescence of backlight will directly have influence on the picture quality of display panels, and therefore, backlight is the very important building block of liquid crystal display.Light emitting diode (Light Emitting Diode, be called for short: the field of LED) using as display device is also more and more wider, universal along with LED-backlit source liquid crystal display, LED has become the best backlight of present liquid crystal display.
Existing backlight can comprise two kinds, direct-light-type backlight and side backlight source.Direct-light-type backlight is the LED lamp to be arranged on the back side of liquid crystal display, the LED lamp can be arranged on the zones of different at the liquid crystal display back side, and can independently adjust shading value, thereby make light that the LED lamp sends can be communicated to uniformly the whole screen of liquid crystal display, because the LED lamp is to all the winds to send light, therefore loss that can the generating unit light splitting, this causes providing by the quantity that increases the LED lamp light satisfying the brightness of liquid crystal display equipment screen, thereby has strengthened manufacturing cost; The side backlight source is at the edge of liquid crystal display, the LED lamp to be set, this design diffuses to the screen center zone to the light of the LED lamp emission that is positioned at screen edge with display frame by LGP, reduced the number of LED lamp, thereby reduced manufacturing cost, yet because the brightness uniformity of LGP is poor, cause whole screen intensity inhomogeneous, can not take full advantage of the light that light source sends, the light utilization efficiency that causes light source to send is not high, and then can not satisfy brightness requirement.
In sum, although the side backlight source has been reduced to a certain extent the number of LED lamp with respect to direct-light-type backlight and improved the utilization rate of light, the number of the LED lamp that use in the side backlight source is still more and light utilization efficiency is lower.
Summary of the invention
The invention provides a kind of backlight and display unit, can solve existing backlight and use LED lamp quantity many, the shortcoming that light utilization efficiency is low has reduced the quantity of using the LED lamp greatly, has improved the utilization rate of light, provides cost savings.
Provide a kind of backlight for solving the technology of the present invention problem, comprising: optics module and the light source assembly that is arranged at described optics module side;
Described light source assembly comprises: light source, the first optics and the second optics;
The light that described the first optics is used for described light source is sent changes directional light into and is transmitted through described the second optics;
Described the second optics is used for the directional light of described the first optics transmission is reflexed to described optics module.
Alternatively, described the first optics comprises convex lens, between described light source and described the second optics.
Alternatively, described light source is positioned at one times of focal length place of described the first optics.
Alternatively, described the second optics comprises: a plurality of pellicle mirrors that are arranged in order, each described pellicle mirror has specific reflectivity, in order to the directional light of described the first optics transmission is reflexed to described optics module.Wherein, described pellicle mirror reflexes to the optics module according to the reflectivity of self with a part of light of incident, makes simultaneously other a part of light transmission, shines on next pellicle mirror
Alternatively, the reflectivity of described pellicle mirror is regulated according to the object brightness of its number and described backlight.
Alternatively, a plurality of described pellicle mirrors be arranged in parallel, and described pellicle mirror has specific angle of inclination.
Alternatively, the quantity of described light source assembly is two, and two light source assemblies lay respectively at two corresponding sides of described optics module.
Alternatively, described light source comprises the LED lamp.
Provide a kind of display unit for solving the technology of the present invention problem, comprising: comprise backlight, described backlight adopts above-mentioned backlight.
In a kind of backlight provided by the invention, the light that the convex lens of the first optics send light source changes directional light into and is transmitted through the second optics; Thereby the pellicle mirrors that the second optics a plurality of are arranged in order reflex to the optics module according to specific reflectivity with the directional light of the convex lens transmission of the first optics the light that light source sends are all reflexed to the optics module, thereby greatly reduced the quantity of LED lamp, improved the utilization rate of light, provided cost savings.
In a kind of display unit provided by the invention, because display unit of the present invention comprises above-mentioned backlight, therefore its picture brightness and uniformity improve greatly.
Description of drawings
Fig. 1 is the back light source structure schematic diagram of the embodiment of the present invention one;
Fig. 2 be in Fig. 1 A-A to cutaway view;
Fig. 3 is the structural representation of the backlight design of the embodiment of the present invention two.
Fig. 4 is the structural representation of the backlight design of the embodiment of the present invention three.
The specific embodiment
For making those skilled in the art understand better technical scheme of the present invention, below in conjunction with accompanying drawing, a kind of backlight provided by the invention and display unit are described in further detail.
Embodiment 1:
The structural representation of a kind of backlight that Fig. 1 provides for the embodiment of the present invention one, Fig. 2 is that in Fig. 1, A-A is to cutaway view, as depicted in figs. 1 and 2, this backlight comprises: optics module 1 and be arranged at the light source assembly 2 of optics module 1 side.
The light that the first optics 22 is used for light source 21 is sent changes directional light into and is transmitted through the second optics 23.The first optics 22 is between light source 21 and the second optics 23, and the first optics 22 changes the direction of propagation of the light that sends from the LED lamp, by changing directional light into from from all directions diverging light.Preferably, the first optics 22 can be convex lens, and the light that utilizes convex lens light source can be dispersed can gather, and will change directional light into from light from all directions.
Alternatively, the first optics 22 also can be for having convergent light source and changing them other optics of directional light effect into.
The second optics 23 is used for the directional light of the first optics 22 transmissions is reflexed to optics module 1.The second optics 23 can be a plurality of pellicle mirrors that are arranged in order, and each pellicle mirror has specific reflectivity, and each pellicle mirror reflectivity specific according to it carries out optical treatment to the directional light of incident.Being each pellicle mirror reflexes to the optics module according to self reflectivity with a part of light of incident, makes simultaneously other a part of light transmission, shines on next pellicle mirror, to realize that the directional light of the first optics 22 transmissions is reflexed to optics module 1.
Particularly, the directional light part that pellicle mirror is come the first optics 22 transmissions reflexes to optics module 1, and other a part of directional light is seen through, shine on next pellicle mirror, the directional light part that next pellicle mirror is come a upper pellicle mirror transmission reflexes to optics module 1, and other a part of directional light is seen through, repeat this process, be sustained, to the last a pellicle mirror reflexes to optics module 1 with directional light with a hundred per cent, and the light that light source sends all enters into optics module 1.
The specific reflectance of each pellicle mirror can be regulated according to the number of pellicle mirror and the object brightness of backlight.A plurality of pellicle mirrors that are arranged in order can be arranged in parallel, and pellicle mirror has specific angle of inclination.The angle of inclination of pellicle mirror is for making pellicle mirror incide light generation total reflection on the site.
Alternatively, the second optics 23 also can reflex to the optics module with a directional light part for having, and makes the optics of other a part of light transmission.
In the present invention, the computing formula of the reflectivity of pellicle mirror is:
Reflectivity=(intensity of reflected light/incident intensity) * 100%; Wherein, intensity of reflected light=incident intensity+emergent light intensity.
For example, when table 1 is 10 for the pellicle mirror number, the reflectivity of each pellicle mirror.As shown in table 1 below:
Table 1
as can be seen from Table 1, when the number that pellicle mirror is set when us is ten, these ten pellicle mirrors are arranged in order from top to bottom, pellicle mirror near light source 21 is first pellicle mirror, when the directional light of coming from the convex lens transmission is 10000nit, the directional light part that pellicle mirror is come the convex lens transmission reflexes to optics module 1, the reflecting part light splitting is that reverberation is 1000nit, and other a part of directional light is seen through, permeation parts light is that emergent light is 9000nit, therefore, can calculate by the computing formula of above-mentioned reflectivity the reflectivity n1=(1000nit/10000nit) of first pellicle mirror * 100%=10%.
The directional light that sees through of a part in addition, be emergent light 9000nit, as the incident light that shines on next pellicle mirror, its directional light part that first pellicle mirror transmission is come reflexes to optics module 1, the reflecting part light splitting is that reverberation is 1000nit, and other a part of directional light is seen through, permeation parts light is that emergent light is 8000nit, therefore, can calculate by the computing formula of above-mentioned reflectivity the reflectivity n2=(1000nit/9000nit) of first pellicle mirror * 100%=11.1%.
In like manner, can calculate successively the reflectivity of eight other pellicle mirrors, pellicle mirror to the last, the reflectivity n10=(1000nit/1000nit) of the tenth pellicle mirror * 100%=100%, at this moment, directional light reflexes to a hundred per cent in optics module 1.So far, the light that sends of light source 21 all enters into optics module 1.
In the technical scheme of the backlight that the present embodiment provides, the light that the first optics sends light source changes directional light into and is transmitted through the second optics, the second specific reflectivity of optics basis reflexes to the optics module with the directional light of the first optics transmission, realized that the light that light source is sent all reflexes to the optics module, thereby greatly reduced the quantity of light source, greatly improved the utilization rate of light, provided cost savings.
Embodiment 2:
Fig. 3 provides a kind of structural representation of backlight for the embodiment of the present invention two, as shown in Figure 3, this backlight comprises: two light source assemblies 2, two light source assemblies 2 lay respectively at two corresponding sides of optics module 1, namely the light source in two light source assemblies lays respectively on the diagonal of optics module, the reflectivity of the pellicle mirror of the second optics in two light source assemblies is complementary, for example, the reflectivity of first pellicle mirror of the second optics of left side light source assembly is 10%, the reflectivity of first pellicle mirror of the second optics of right side light source assembly is 90%, calculate successively, the reflectivity of second pellicle mirror of left side light source assembly the second optics is 11.1%, the reflectivity of second pellicle mirror of the second optics of right side light source assembly is 88.9%, until last pellicle mirror, the reflectivity of the tenth pellicle mirror of left side light source assembly the second optics is 100%, the reflectivity of the tenth pellicle mirror of the second optics of right side light source assembly is 0%.
Wherein, the specific descriptions of optics module 1 and each light source assembly 2 can be referring to above-described embodiment one.
In actual applications, according to needs of production, the quantity of light source assembly 2 can also be for more than three.
In the technical scheme of a kind of backlight that the present embodiment provides, by increasing the quantity of light source assembly, it can effectively improve the utilization rate of light and brightness and the uniformity of picture further, provides cost savings.
Embodiment 3:
Fig. 4 provides a kind of structural representation of backlight for the embodiment of the present invention three, as shown in Figure 4, this backlight comprises: two light source assemblies 2, two light source assemblies 2 lay respectively at two sides accordingly of optics module 1, namely the light source in two light source assemblies lays respectively on the parallel lines of optics module, the reflectivity of the pellicle mirror of the second optics in two light source assemblies is complementary, for example, the reflectivity of first pellicle mirror of the second optics of left side light source assembly is 10%, the reflectivity of first pellicle mirror of the second optics of right side light source assembly is 90%, calculate successively, the reflectivity of second pellicle mirror of left side light source assembly the second optics is 11.1%, the reflectivity of second pellicle mirror of the second optics of right side light source assembly is 88.9%, until last pellicle mirror, the reflectivity of the tenth pellicle mirror of left side light source assembly the second optics is 100%, the reflectivity of the tenth pellicle mirror of the second optics of right side light source assembly is 0%.
The specific embodiment of a kind of backlight that the present embodiment provides repeats no more referring to embodiment two herein.
Embodiment 4:
The embodiment of the present invention four provides a kind of display unit, and this display unit comprises backlight and liquid crystal module, and wherein, backlight is positioned at the back side of liquid crystal module, and provides light source to liquid crystal module.Backlight adopts the backlight in embodiment one or embodiment two, repeats no more herein.
In the technical scheme of a kind of display unit provided by the invention, comprise the backlight of above-described embodiment one or embodiment two due to display unit, therefore its picture brightness and uniformity improve greatly.
Be understandable that, above embodiment is only the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement also are considered as protection scope of the present invention.
Claims (9)
1. a backlight, comprise optics module and the light source assembly that is arranged at described optics module side, and it is characterized in that: described light source assembly comprises: light source, the first optics and the second optics;
The light that described the first optics is used for described light source is sent changes directional light into and is transmitted through described the second optics;
Described the second optics is used for the directional light of described the first optics transmission is reflexed to described optics module.
2. backlight according to claim 1, is characterized in that, described the first optics comprises convex lens, between described light source and described the second optics.
3. backlight according to claim 1, is characterized in that, described light source is positioned at one times of focal length place of described the first optics.
4. backlight according to claim 1, it is characterized in that, described the second optics comprises: a plurality of pellicle mirrors that are arranged in order, each described pellicle mirror has specific reflectivity, in order to the directional light of described the first optics transmission is reflexed to described optics module.
5. backlight according to claim 4, is characterized in that, the reflectivity of described pellicle mirror is regulated according to the object brightness of its number and described backlight.
6. backlight according to claim 4, is characterized in that, a plurality of described pellicle mirrors be arranged in parallel, and described pellicle mirror has specific angle of inclination.
7. backlight according to claim 1, is characterized in that, the quantity of described light source assembly is two, and described two light source assemblies lay respectively at two corresponding sides of described optics module.
According to claim 1 to 7 arbitrary described backlight, it is characterized in that, described light source comprises the LED lamp.
9. a display unit, comprise backlight and liquid crystal module, it is characterized in that, described backlight adopts the arbitrary described backlight of claim 1-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090704.8A CN103175032B (en) | 2013-03-20 | 2013-03-20 | Backlight source and display device |
| PCT/CN2013/076950 WO2014146354A1 (en) | 2013-03-20 | 2013-06-07 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090704.8A CN103175032B (en) | 2013-03-20 | 2013-03-20 | Backlight source and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103175032A true CN103175032A (en) | 2013-06-26 |
| CN103175032B CN103175032B (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310090704.8A Expired - Fee Related CN103175032B (en) | 2013-03-20 | 2013-03-20 | Backlight source and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103175032B (en) |
| WO (1) | WO2014146354A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405932A (en) * | 2016-09-28 | 2017-02-15 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| JP2002169480A (en) * | 2000-11-30 | 2002-06-14 | Fuji Photo Film Co Ltd | Collimated plane light source, display device and display unit using the same |
| JP2003331626A (en) * | 2002-03-08 | 2003-11-21 | Seiko Epson Corp | Light source conversion device, point light source, color rendering control method, program thereof, and electronic device |
| CN1504803A (en) * | 2002-11-29 | 2004-06-16 | 鸿富锦精密工业（深圳）有限公司 | Backlight source and liquid crystal display device |
| JP2006156231A (en) * | 2004-11-30 | 2006-06-15 | Harison Toshiba Lighting Corp | Backlight |
| CN101743510A (en) * | 2007-07-17 | 2010-06-16 | 松下电器产业株式会社 | Liquid crystal backlight device and liquid crystal display |
| CN102313246A (en) * | 2011-09-05 | 2012-01-11 | 广东威创视讯科技股份有限公司 | Area light source collimation device and light beam collimation method |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1503014A (en) * | 2002-11-22 | 2004-06-09 | 鸿富锦精密工业（深圳）有限公司 | Polarization device, polarization light source and LCD device |
| JP3898217B1 (en) * | 2006-05-30 | 2007-03-28 | 日立マクセル株式会社 | Backlight unit and liquid crystal display device |
| JPWO2011024530A1 (en) * | 2009-08-27 | 2013-01-24 | シャープ株式会社 | Backlight system and liquid crystal display device using the same |
| WO2012086511A1 (en) * | 2010-12-24 | 2012-06-28 | シャープ株式会社 | Lighting unit, display unit and television receiver |
| CN202432373U (en) * | 2012-02-15 | 2012-09-12 | 青岛海信电器股份有限公司 | Television backlight source system and television |
-
2013
- 2013-03-20 CN CN201310090704.8A patent/CN103175032B/en not_active Expired - Fee Related
- 2013-06-07 WO PCT/CN2013/076950 patent/WO2014146354A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002169480A (en) * | 2000-11-30 | 2002-06-14 | Fuji Photo Film Co Ltd | Collimated plane light source, display device and display unit using the same |
| JP2003331626A (en) * | 2002-03-08 | 2003-11-21 | Seiko Epson Corp | Light source conversion device, point light source, color rendering control method, program thereof, and electronic device |
| CN1504803A (en) * | 2002-11-29 | 2004-06-16 | 鸿富锦精密工业（深圳）有限公司 | Backlight source and liquid crystal display device |
| JP2006156231A (en) * | 2004-11-30 | 2006-06-15 | Harison Toshiba Lighting Corp | Backlight |
| CN101743510A (en) * | 2007-07-17 | 2010-06-16 | 松下电器产业株式会社 | Liquid crystal backlight device and liquid crystal display |
| CN102644883A (en) * | 2011-03-25 | 2012-08-22 | 京东方科技集团股份有限公司 | Direct type backlight source |
| CN102313246A (en) * | 2011-09-05 | 2012-01-11 | 广东威创视讯科技股份有限公司 | Area light source collimation device and light beam collimation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405932A (en) * | 2016-09-28 | 2017-02-15 | 京东方科技集团股份有限公司 | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103175032B (en) | 2015-06-17 |
| WO2014146354A1 (en) | 2014-09-25 |
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