CN106125403A - A kind of backlight module and liquid crystal display - Google Patents
A kind of backlight module and liquid crystal display Download PDFInfo
- Publication number
- CN106125403A CN106125403A CN201610803997.3A CN201610803997A CN106125403A CN 106125403 A CN106125403 A CN 106125403A CN 201610803997 A CN201610803997 A CN 201610803997A CN 106125403 A CN106125403 A CN 106125403A
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- Prior art keywords
- light
- backlight module
- light source
- optical
- led light
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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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of backlight module and liquid crystal display, and wherein backlight module includes: LED light source；Collimating lens, after the light that the light that described LED light source is launched is adjusted to predetermined angle scope, makes light penetrate from its surface；Multilayer optical film optical filter, is used for the light by preset wavelength scope, and filters the light of non-described preset wavelength scope；Diffusion layer, light guide plate, reflector plate, glue frame and backboard.Present invention achieves the colour gamut that liquid crystal display reaches equal with there being Cd element quantum dot liquid crystal display at present, the green purpose without Cd element can be reached again.
Description
[technical field]
The present invention relates to field of liquid crystal display, particularly to a kind of backlight module and liquid crystal display.
[background technology]
The flat display apparatus such as liquid crystal display (Liquid Crystal Display, LCD) are because having high image quality, province
Electricity, fuselage is thin and the advantage such as applied range, and be widely used in mobile phone, TV, personal digital assistant, digital camera,
The various consumption electronic products such as notebook computer, desk computer, become the main flow in display device.Liquid on existing market
Crystal device major part is backlight liquid crystal display, and it includes display panels (TFT-LCD) and backlight module
(backlight module).The operation principle of display panels is to place liquid crystal in the middle of the glass substrate that two panels is parallel to divide
Son, has many tiny electric wires vertically and horizontally in the middle of two panels glass substrate, control liquid crystal molecule by whether being energized and change
Direction, reflects generation picture by the light of backlight module.
In current liquid crystal display device, commonly used white LED light source is as backlight.And most common white light LEDs
Light source is the LED light source that blue light emitting chip adds that yellow YAG phosphor is combined into, but uses yellow fluorescent powder material
After LED light source collocation liquid crystal display screen, color saturation is relatively low, and display color is the most bright-coloured.In order to improve color saturation, generally
Realize by the way of yellow fluorescent powder is changed to RG fluorescent material, but this mode needs to change the LED of different fluorescent material
Light source, it is impossible to directly promote colour gamut on the basis of using existing light source.Satisfy LCD backlight technical side at high color at present
Face, it is the backlight of quanta point material containing Cd element that colour gamut can reach the highest, owing to the health of human body is had non-by Cd element
The biggest impact, and quantum dot diaphragm is much more expensive, and so the high color developing the low cost of a kind of element without Cd is satisfied, technology is
Liquid crystal display height color satisfy technology development trend.
[summary of the invention]
It is an object of the invention to provide a kind of backlight module and liquid crystal display, reach and mesh realizing liquid crystal display
Before have the equal colour gamut of Cd element quantum dot liquid crystal display, the green purpose without Cd element can be reached again.
Technical scheme is as follows:
A kind of backlight module, including:
LED light source, is used for launching light；
Collimating lens, is located at described LED light source and launches the dead ahead of light, for the light launched by described LED light source
Line is adjusted to the light of predetermined angle scope, and makes the light after adjustment penetrate from its light output surface；
Multilayer optical film optical filter, is located at the dead ahead in the light injection direction of described collimating lens, for by advance
If the light of wave-length coverage, and filter the light beyond described preset wavelength scope；
Diffusion layer, is located on the exiting surface of described multilayer optical film optical filter, and being used for will be from described multilayer optical film
The light of optical filter injection is broken up and mixed light；
Light guide plate, that is located at described diffusion layer goes out light side, guides liquid crystal for the light that will penetrate from described diffusion layer
Display screen；
Reflector plate, is located at described light guide plate lower end, for the light that described LED light source is launched is reflexed to described leaded light
Plate；
Glue frame and backboard, be used for encapsulating described LED light source, described collimating lens, multilayer optical film optical filter, described expansion
Dissipate layer, described light guide plate and described reflector plate.
Preferably, the substrate of described multilayer optical film optical filter is glass substrate, and described glass substrate is provided with optics
Thin layer, described optical thin film layer is alternately arranged with the first optical thin film and second optical thin film of at least 40 layers, and described
The optical index of the first optical thin film is more than the optical index of described second optical thin film.
Preferably, the magnitude range of the optical index of described first optical thin film is 2～2.8, described second optical thin film
The magnitude range of optical index be 1.3～1.8.
Preferably, described predetermined angle scope is that the light penetrated from described collimating lens is filtered with described multilayer optical film
The magnitude range of the angle of incidence that mating plate is formed, this angle of incidence is less than or equal to 30 °.
Preferably, described preset wavelength scope is 425～47nm, 510～560nm and 610～730nm.
Preferably, described LED light source, described collimating lens and the lower section of the described reflector plate near described diffusion layer, with
The part surrounded between described backboard is provided with heat radiation extinction structure.
Preferably, surround between described LED light source, described collimating lens and the top of described diffusion layer, and described glue frame
Part be provided with light-shielding structure.
Preferably, described LED light source connects has radiator structure, described radiator structure to be located at described LED light source and the described back of the body
Between plate.
Preferably, described light guide plate is arranged over blooming piece, and described blooming piece will be for penetrating from described light guide plate
Light conduction to LCDs.
A kind of liquid crystal display, including a backlight module and display panels, wherein this backlight module is the above
Backlight module.
Beneficial effects of the present invention:
A kind of backlight module of the present invention and liquid crystal display, by by collimating lens, multilayer optical film optical filter and
Diffusion layer combines, and is made the light of LED light source filter with less incident angles to multilayer optical film by collimating lens
On mating plate, the penetrance of required light is made to be greatly improved, it is achieved that liquid crystal display reaches and has Cd element quantum dot liquid at present
The colour gamut that crystal display is equal, can reach again the green purpose without Cd element, and the color saturation of liquid crystal display can carry
It is raised to more than 110%.
[accompanying drawing explanation]
Fig. 1 is the cross section view of a kind of backlight module of the embodiment of the present invention；
Fig. 2 is that the light from collimating lens injection of the embodiment of the present invention forms angle of incidence with multilayer optical film optical filter
Schematic diagram.
[detailed description of the invention]
The explanation of following embodiment is particular implementation that is graphic with reference to add, that implement in order to illustrate the present invention may be used to
Example.The direction term that the present invention is previously mentioned, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side "
Deng, it is only the direction with reference to annexed drawings.Therefore, the direction term of use is to illustrate and understand the present invention, and is not used to
Limit the present invention.In the drawings, the unit that structure is similar is to represent with identical label.
Embodiment one
The principle of the present invention is, the light of LED light source 1 is adjusted to the light of predetermined angle scope by collimating lens 2,
Make the angle of incidence a of incident ray less, typically smaller than 30 °, then make this light penetrate from multilayer optical film optical filter 3, warp
When crossing multilamellar optical film filter 3, because allowing the light of narrower wave-length coverage to pass through, only has narrower wave-length coverage
Light has been guided LCDs by light guide plate 5.The most individual, the angle of incidence a of light is the least, and the effect promoting colour gamut is the best.
Refer to the cross section view of a kind of backlight module that Fig. 1 and Fig. 2, Fig. 1 are the present embodiment, Fig. 2 is this enforcement
The schematic diagram forming angle of incidence a from the light of collimating lens 2 injection and multilayer optical film optical filter 3 of example.From Fig. 1 and Fig. 2
It will be seen that a kind of backlight module of the present invention, including:
LED light source 1, is used for launching light.
Collimating lens 2, is located at described LED light source 1 and launches the dead ahead of light, for launched by described LED light source 1
Light is adjusted to the light of predetermined angle scope, and makes the light after adjustment penetrate from its light output surface.
Multilayer optical film optical filter 3, is located at the dead ahead in the light injection direction of described collimating lens 2, is used for passing through
The light of preset wavelength scope, and filter the light beyond described preset wavelength scope.
In the present embodiment, the substrate of described multilayer optical film optical filter 3 is glass substrate 32, described glass substrate 32
It is provided with optical thin film layer 31, described optical thin film layer 31 is alternately arranged with the first optical thin film and second light of at least 40 layers
Learn thin film, and the optical index of described first optical thin film is more than the optical index of described second optical thin film.
In the present embodiment, the magnitude range of the optical index of the most described first optical thin film is 2～2.8, described
The magnitude range of the optical index of two optical thin films is 1.3～1.8.
Diffusion layer 4, is located on the exiting surface of described multilayer optical film optical filter 3, and being used for will be thin from described multilayer optical
The light of film optical filters 3 injection is broken up and mixed light, so can avoid the appearance of Lampyridea phenomenon (i.e. hotspot phenomenon), make
The irradiation ratio obtaining light is more uniform.
Light guide plate 5, that is located at described diffusion layer 4 goes out light side, guides liquid for the light that will penetrate from described diffusion layer 4
Crystal display screen.
Reflector plate 6, is located at described light guide plate 5 lower end, leads described in being reflexed to by the light that described LED light source 1 is launched
Tabula rasa 5.
Glue frame 10 and backboard 11, be used for encapsulating described LED light source 1, described collimating lens 2, multilayer optical film optical filter
3, described diffusion layer 4, described light guide plate 5 and described reflector plate 6.
In the present embodiment, described predetermined angle scope is the light from the injection of described collimating lens 2 and described multilayer optical
Learning the magnitude range of the angle of incidence a that Thin Film Filter 3 is formed, this angle of incidence a is less than or equal to 30 °.Wherein, the entering of incident ray
Firing angle a is the least, and the effect promoting colour gamut is the best.
In the present embodiment, described preset wavelength scope is 425～47nm, 510～560nm and 610～730nm.
In the present embodiment, described LED light source 1, described collimating lens 2 and the described reflector plate 6 near described diffusion layer 4
Lower section, and the part surrounded between described backboard 11 be provided with heat radiation extinction structure 7.
In the present embodiment, this heat radiation extinction structure 7 is aluminium extruded.For aluminium extruded fin material, leading of every kind of material
Hot merit can be different, arranges from high to low by heat conduction function, is silver respectively, copper, aluminum and steel.If but dispelling the heat with silver
Structure 12 can be the most expensive, and the heat conductivity of copper is good, but price is more expensive, and difficulty of processing is higher, and component is excessive, therefore the present invention uses aluminum to close
Gold copper-base alloy.The strong point of aluminium alloy is price low price, and component is light, but heat conductivity will differ from much than copper, therefore can be at aluminium alloy
A piece of copper coin is embedded on foot of radiator.
In the present embodiment, described LED light source 1, described collimating lens 2 and the top of described diffusion layer 4, with described glue frame
The part surrounded between 10 is provided with light-shielding structure 8, to avoid the light of LED light source 1 to miss from glue frame 10 part.
In the present embodiment, described LED light source 1 connects has radiator structure 12, described radiator structure 12 to be located at described LED light
Between source 1 and described backboard 11.This radiator structure 12 is connected with backboard 11, for the heat band produced by described LED light source 1
Walk.
In the present embodiment, described light guide plate 5 is arranged over blooming piece 9, and described blooming piece 9 will be for leading from described
The light conduction of tabula rasa 5 injection is to LCDs.The direct benefit using blooming piece 9 to bring is exactly, of the same area
In space, using the LED light source 1 of diaphragm owing to not irradiating blind area, uniform light, illuminating effect is all far beyond common LED
Light source 1.It is known that all of light fixture all can produce the problem of glare, as LED light source 1 is the most also, producing glare will
Easily cause the visual fatigue of people, use blooming piece 9 can eliminate the distinctive hot spot of LED light source 1.Due to LED light source 1
It is that two rows or three rows rail is then enumerated, can have vacant position between light so each point source sends, in must being spaced, so just produce light
Speckle.After using blooming piece 9, incident point-source light ray is uniformly spread by blooming piece 9, leads to divergent light source injection, so
Light becomes highly uniform, thoroughly solves hot spot problem.
A kind of backlight module of the present invention, by combining collimating lens 2, multilayer optical film optical filter 3 and diffusion layer 4
Get up, made by collimating lens 2 light of LED light source 1 incide on multilayer optical film optical filter 3 with less angle of incidence a,
The penetrance making required light is greatly improved, it is achieved that liquid crystal display reaches and has Cd element quantum dot liquid crystal display at present
Equal colour gamut, can reach again the green purpose without Cd element, and the color saturation of liquid crystal display can rise to 110%
Above, can reach the colour gamut that quantum film can reach, backlight light efficiency part is also suitable with quantum film, and multilayer optical film
The cost of optical filter 3 is significantly less than the cost of quantum film.
Embodiment two
A kind of liquid crystal display of the present invention, including a backlight module and display panels, wherein this backlight module is
Backlight module described in embodiment one, this backlight module has been described in detail in embodiment one, has no longer discussed at this
State.
A kind of liquid crystal display of the present invention, its backlight module is by by collimating lens 2, multilayer optical film optical filter 3
Combine with diffusion layer 4, made by collimating lens 2 light of LED light source 1 incide multilayer optical with less angle of incidence a
On Thin Film Filter 3, the penetrance of required light is made to be greatly improved, it is achieved that liquid crystal display reaches and has Cd amount of element at present
The colour gamut that son point liquid crystal display is equal, can reach again the green purpose without Cd element, the color saturation of liquid crystal display
Can rise to more than 110%, can reach the colour gamut that quantum film can reach, backlight light efficiency part is also suitable with quantum film,
And the cost of multilayer optical film optical filter 3 is significantly less than the cost of quantum film.
In sum, although the present invention is disclosed above with preferred embodiment, but above preferred embodiment and be not used to limit
The present invention processed, those of ordinary skill in the art, without departing from the spirit and scope of the present invention, all can make various change and profit
Decorations, therefore protection scope of the present invention defines in the range of standard with claim.
Claims (10)
1. a backlight module, it is characterised in that including:
LED light source, is used for launching light；
Collimating lens, is located at described LED light source and launches the dead ahead of light, adjusts for the light launched by described LED light source
The whole light for predetermined angle scope, and make the light after adjustment penetrate from its light output surface；
Multilayer optical film optical filter, is located at the dead ahead in the light injection direction of described collimating lens, for by default ripple
The light of long scope, and filter the light beyond described preset wavelength scope；
Diffusion layer, is located on the exiting surface of described multilayer optical film optical filter, for filtering from described multilayer optical film
The light of sheet injection is broken up and mixed light；
Light guide plate, that is located at described diffusion layer goes out light side, guides liquid crystal display for the light that will penetrate from described diffusion layer
Screen；
Reflector plate, is located at described light guide plate lower end, for the light that described LED light source is launched is reflexed to described light guide plate；
Glue frame and backboard, be used for encapsulating described LED light source, described collimating lens, multilayer optical film optical filter, described diffusion
Layer, described light guide plate and described reflector plate.
Backlight module the most according to claim 1, it is characterised in that the substrate of described multilayer optical film optical filter is glass
Glass substrate, described glass substrate is provided with optical thin film layer, and described optical thin film layer is alternately arranged with the first of at least 40 layers
Optical thin film and the second optical thin film, and the optical index of described first optical thin film is more than the light folding of described second optical thin film
Penetrate rate.
Backlight module the most according to claim 2, it is characterised in that the size of the optical index of described first optical thin film
Scope is 2～2.8, and the magnitude range of the optical index of described second optical thin film is 1.3～1.8.
Backlight module the most according to claim 1, it is characterised in that described predetermined angle scope is from described collimating lens
The magnitude range of the angle of incidence that the light of injection is formed with described multilayer optical film optical filter, this angle of incidence is less than or equal to
30°。
Backlight module the most according to claim 1, it is characterised in that described preset wavelength scope is 425～47nm, 510
～560nm and 610～730nm.
Backlight module the most according to claim 1, it is characterised in that described LED light source, described collimating lens and close institute
State the lower section of the described reflector plate of diffusion layer, and the part surrounded between described backboard is provided with heat radiation extinction structure.
Backlight module the most according to claim 1, it is characterised in that described LED light source, described collimating lens and described expansion
Dissipate the top of layer, and the part surrounded between described glue frame is provided with light-shielding structure.
Backlight module the most according to claim 1, it is characterised in that described LED light source connects radiator structure is described scattered
Heat structure is located between described LED light source and described backboard.
Backlight module the most according to claim 1, it is characterised in that described light guide plate is arranged over blooming piece, described
The light conduction that blooming piece is used for penetrate from described light guide plate is to LCDs.
10. a liquid crystal display, it is characterised in that include a backlight module and display panels, wherein this backlight module
For the backlight module described in any one of claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610803997.3A CN106125403A (en) | 2016-09-05 | 2016-09-05 | A kind of backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610803997.3A CN106125403A (en) | 2016-09-05 | 2016-09-05 | A kind of backlight module and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
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| CN106125403A true CN106125403A (en) | 2016-11-16 |
Family
ID=57271694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610803997.3A Pending CN106125403A (en) | 2016-09-05 | 2016-09-05 | A kind of backlight module and liquid crystal display |
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| CN (1) | CN106125403A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405937A (en) * | 2016-11-16 | 2017-02-15 | 深圳市华星光电技术有限公司 | Backlight module |
| CN106681055A (en) * | 2017-03-14 | 2017-05-17 | 深圳市华星光电技术有限公司 | Display device |
| CN108150883A (en) * | 2016-12-05 | 2018-06-12 | 三星电子株式会社 | Display device and the method for manufacturing quantum dot element |
| CN108169959A (en) * | 2018-01-10 | 2018-06-15 | 惠州市华星光电技术有限公司 | A kind of beam condensing unit for improving liquid crystal display colour gamut |
| CN109597246A (en) * | 2019-01-31 | 2019-04-09 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| CN109705728A (en) * | 2019-03-01 | 2019-05-03 | 拓米(成都)应用技术研究院有限公司 | A kind of uvioresistant film and preparation method thereof for the surface QD-LCD |
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| 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 |
| CN104515041A (en) * | 2014-12-15 | 2015-04-15 | 深圳市华星光电技术有限公司 | Backlight module structure |
| CN105093662A (en) * | 2015-09-11 | 2015-11-25 | 深圳市华星光电技术有限公司 | Optical filter and backlight module |
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| JP2001311947A (en) * | 1992-07-06 | 2001-11-09 | Omron Corp | Liquid crystal display device |
| 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 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405937A (en) * | 2016-11-16 | 2017-02-15 | 深圳市华星光电技术有限公司 | Backlight module |
| CN106405937B (en) * | 2016-11-16 | 2019-08-13 | 深圳市华星光电技术有限公司 | Backlight module |
| CN108150883A (en) * | 2016-12-05 | 2018-06-12 | 三星电子株式会社 | Display device and the method for manufacturing quantum dot element |
| CN108150883B (en) * | 2016-12-05 | 2021-09-21 | 三星电子株式会社 | Display device and method of manufacturing quantum dot unit |
| CN106681055A (en) * | 2017-03-14 | 2017-05-17 | 深圳市华星光电技术有限公司 | Display device |
| CN108169959A (en) * | 2018-01-10 | 2018-06-15 | 惠州市华星光电技术有限公司 | A kind of beam condensing unit for improving liquid crystal display colour gamut |
| CN109597246A (en) * | 2019-01-31 | 2019-04-09 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| CN109597246B (en) * | 2019-01-31 | 2021-12-21 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| CN109705728A (en) * | 2019-03-01 | 2019-05-03 | 拓米(成都)应用技术研究院有限公司 | A kind of uvioresistant film and preparation method thereof for the surface QD-LCD |
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Application publication date: 20161116 |