CN104460098A - Liquid crystal display method and device - Google Patents
Liquid crystal display method and device Download PDFInfo
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- CN104460098A CN104460098A CN201310432174.0A CN201310432174A CN104460098A CN 104460098 A CN104460098 A CN 104460098A CN 201310432174 A CN201310432174 A CN 201310432174A CN 104460098 A CN104460098 A CN 104460098A
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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
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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
- G02F1/133528—Polarisers
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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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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
The invention discloses a liquid crystal display method and device. The liquid crystal display method comprises the steps that ultraviolet light or near ultraviolet blue light is adopted to generate backlight; a first polarizing film is utilized, so that polarized light, in the first polarization direction, in the backlight penetrates through the first polarizing film; control voltage is applied to a liquid crystal layer, so that the polarization direction of the polarized light in the first polarization direction is made to deflect; a second polarizing film is utilized, so that the polarized light, in the second polarization direction, of the polarized light with the deflected polarization direction penetrates through the second polarizing film in a component mode; the polarized light which is in the second polarization direction and penetrates through the second polarizing film is utilized for bombing a fluorescent screen, and the fluorescent screen generates visible light for watching by a watcher. As the ultraviolet light or near ultraviolet blue light has relatively narrower wavelength range compared with white light, optical devices in the liquid crystal display device can represent good optical coherence.
Description
Technical field
The present invention relates to technical field of liquid crystal display, and relate more specifically to a kind of liquid crystal display method and liquid crystal display.
Background technology
Liquid crystal display, compared with traditional CRT display device, volume has revolutionary advantage.But on the other hand, the color displays performance of available liquid crystal display device is but not as good as the color displays performance of traditional CRT display device.
Traditional CRT display device is by beam bombardment light-emitting phosphor, and this belongs to Autoluminescence display technique, and it has, and colour gamut is large, visual angle large, descending with great visual angle the advantage that colour cast is very little.And these advantages of traditional CRT display device exactly become the weak point of available liquid crystal display device.
For available liquid crystal display device, backlight adopts white light LEDs mostly, and white-light spectrum composition covers all wavelengths of visible ray.So wide wavelength is all challenge, such as a polaroid, liquid crystal etc. concerning all devices relevant with wavelength, this is because the optical characteristics of birefringent material is all relevant with the wavelength of the light by this birefringent material.Usually, wavelength components is more complicated, and the optical homogeneity of the device relevant with wavelength is poorer.Such as, polaroid may be different to the polarization degree of different wave length, and liquid crystal layer is also different to the polarisation of light direction degree of deflection of different wave length under same driving voltage.Thus, available liquid crystal display device has some inconsistencies when showing to the light (correspondingly, to the light of different colours) of different wave length.On the other hand, available liquid crystal display device adopts color filter to realize colored display, it reduces the efficiency of light energy utilization, causes the light outgoing degradation of liquid crystal display, colour cast serious.
Therefore, need a kind of liquid crystal display method and liquid crystal display, it can improve the color offset phenomenon of liquid crystal display.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of liquid crystal display method and liquid crystal display, it is by utilizing ultraviolet light or near ultraviolet blue light as backlight, control liquid crystal layer to the deflection of this backlight by pixel voltage, finally utilize the ultraviolet light of permeate crystal layer and the second polaroid or near ultraviolet blue light impact fluorescence material emission.Because ultraviolet light or near ultraviolet blue light have the wavelength coverage of relative narrower compared with white light, the optical device therefore in liquid crystal display can show good optical homogeneity.
According to an aspect of the present invention, provide a kind of liquid crystal display method, comprising: adopt ultraviolet light or near ultraviolet blue light to produce backlight; Utilize the first polaroid, the polarized light making to have in described backlight the first polarization direction through; Apply control voltage to liquid crystal layer, the polarization direction described in making with the polarized light of the first polarization direction deflects; Utilize the second polaroid, make polarization direction deflect after described polarized light in the polarized light component with the second polarization direction through; And utilize the described polarized light impact fluorescence film with the second polarization direction through the second polaroid, make fluorescent film produce visible ray, watch for beholder.
Preferably, in described liquid crystal display method, the visible ray that described fluorescent film produces is the first primary lights, the second primary lights and three primary colours light.Described fluorescent film divides pixel region and subpixel area accordingly with the pixel region of described liquid crystal layer and subpixel area, each pixel region comprises three subpixel area, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, apply the second fluorescent material in second subpixel area of each pixel region on described fluorescent film, in the 3rd subpixel area of each pixel region on described fluorescent film, apply the 3rd fluorescent material.First fluorescent material produces the first primary lights, and the second fluorescent material produces the second primary lights, and the 3rd fluorescent material produces three primary colours light, synthesizes the image for beholder's viewing by the first primary lights, the second primary lights and three primary colours light.
Preferably, in described liquid crystal display method, described backlight has intensity peak at first wave length, second wave length and the 3rd wavelength place, and is approximately zero in the intensity at other wavelength place, and described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band.
Utilize the described polarized light impact fluorescence film with the second polarization direction through the second polaroid to make fluorescent film produce visible ray to comprise: utilize in first wave length, second wave length and the 3rd wavelength place have the polarized light described in intensity peak with the second polarization direction and bombard the first fluorescent material in the first subpixel area, the 3rd fluorescent material in the second fluorescent material in second subpixel area and the 3rd subpixel area, and described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength, described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength, and described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
Alternatively, in described liquid crystal display method, described backlight has intensity peak in first wave strong point, and is approximately zero in the intensity at other wavelength place, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band.
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light.
Preferably, described liquid crystal display method also comprises: absorb the polarized light described in the described ultraviolet light or near ultraviolet blue light that are not absorbed by described fluorescent film with the second polarization direction.
Preferably, in described liquid crystal display method, described first polarization direction is identical with described second polarization direction, or described first polarization direction is vertical with described second polarization direction.
According to a further aspect of the invention, provide a kind of liquid crystal display, comprising: backlight portion, for adopting ultraviolet light or near ultraviolet blue light to produce backlight; First polaroid, be provided for the polarized light that in the backlight that described backlight portion produces there is the first polarization direction through; Liquid crystal layer, the polarization direction described in being provided for the polarized light of the first polarization direction deflects; Second polaroid, be provided for polarization direction deflection after described polarized light in the polarized light component with the second polarization direction through; And fluorescent film, described in being subject to, producing visible ray through the bombardment with the polarized light of the second polarization direction of the second polaroid, watching for beholder.
Preferably, in described liquid crystal display, with the pixel region of described liquid crystal layer and subpixel area accordingly, described fluorescent film correspondingly divides pixel region and subpixel area, each pixel region comprises three subpixel area, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, apply the second fluorescent material in second subpixel area of each pixel region on described fluorescent film, in the 3rd subpixel area of each pixel region on described fluorescent film, apply the 3rd fluorescent material.
The visible ray that described fluorescent film produces is the first primary lights, the second primary lights and three primary colours light, and the first fluorescent material produces the first primary lights, second fluorescent material produces the second primary lights, 3rd fluorescent material produces three primary colours light, synthesizes the image for beholder's viewing by the first primary lights, the second primary lights and three primary colours light.
Preferably, in described liquid crystal display, the backlight that described backlight portion produces has intensity peak at first wave length, second wave length and the 3rd wavelength place, and be approximately zero in the intensity at other wavelength place, described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band
When described first fluorescent material of light bombardment of described first wave length, described first fluorescent material produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength; When described second fluorescent material of light bombardment of described second wave length, described second fluorescent material produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength; And when described 3rd fluorescent material of light bombardment of described 3rd wavelength, described 3rd fluorescent material produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
Alternatively, in described liquid crystal display, the backlight that described backlight portion produces has intensity peak in first wave strong point, and is approximately zero in the intensity at other wavelength place, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band.
When described first fluorescent material of light bombardment of described first wave length, described first fluorescent material produces described first primary lights; When described second fluorescent material of light bombardment of described second wave length, described second fluorescent material produces described second primary lights; And when described 3rd fluorescent material of light bombardment of described 3rd wavelength, described 3rd fluorescent material produces described three primary colours light.
Preferably, described liquid crystal display also comprises: absorbing film, is arranged between described fluorescent film and beholder, for absorbing the polarized light with the second polarization direction of described ultraviolet light or the near ultraviolet blue light do not absorbed by described fluorescent film.
Preferably, in described liquid crystal display, described first polarization direction is identical with described second polarization direction, or described first polarization direction is vertical with described second polarization direction.
Preferably, in described liquid crystal display, described fluorescent film is made as transparent, and described liquid crystal layer and described first and second polaroids are also made as transparent, and described light guide plate is also made as transparent, makes to realize Transparence Display.
Preferably, also comprise in described liquid crystal display: the 3rd polaroid, be provided for the polarized light that in the backlight that described backlight portion produces there is the 3rd polarization direction through; Another liquid crystal layer, the polarization direction described in being provided for the polarized light of the 3rd polarization direction deflects; 4th polaroid, be provided for polarization direction deflection after described polarized light in the polarized light component with the 4th polarization direction through; And another fluorescent film, visible ray is produced through the bombardment with the polarized light of the 4th polarization direction of the 4th polaroid described in being subject to, for beholder's viewing, wherein, described first polaroid lays respectively at the relative both sides of described backlight portion with described 3rd polaroid.
According to liquid crystal display method and the liquid crystal display of the embodiment of the present invention, by adopting ultraviolet light or near ultraviolet blue light as backlight and sending visible ray by this backlight impact fluorescence material of employing, the optical homogeneity of liquid crystal display can be improved, reduce the color offset phenomenon of liquid crystal display, and improve the efficiency of light energy utilization.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 schematically illustrates the stacking figure of optical device of the liquid crystal display of prior art;
Fig. 2 schematically illustrates according to the stacking figure of the optical device of the liquid crystal display of the embodiment of the present invention;
Fig. 3 schematically illustrates the process flow diagram of the liquid crystal display method according to the embodiment of the present invention;
Fig. 4 schematically illustrates the block diagram of liquid crystal display according to a first embodiment of the present invention; And
Fig. 5 schematically illustrates the block diagram of liquid crystal display according to a second embodiment of the present invention.
Embodiment
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention.Here it is to be noted that it in the accompanying drawings, identical Reference numeral is given there is identical or similar structures and function ingredient substantially, and the repeated description of will omit about them.
As shown in Figure 1, the stacking figure of optical device of the liquid crystal display of prior art is schematically shown.
White LED is disposed in the side (such as, can be the combination in any of left side, right side, upside, downside) of light guide plate, and produces white light as backlight.The white light that White LED sends by light guide plate becomes uniform white light.In other words, light guide plate as area source, provides white light as backlight together with White LED.
White light incides on lower polaroid, and the white light only with the first polarization direction can through lower polaroid.Then, by applying control voltage to liquid crystal layer, the polarization direction through having the white light of the first polarization direction described in described lower polaroid is deflected.That is, the polarization direction of certain angle that has been the basic upper deflecting in the first polarization direction, the polarization direction of the white light of permeate crystal layer.Next, the white light of permeate crystal layer incides on upper polarizer, and the white light only with the second polarization direction can through upper polarizer, and described second polarization direction can be identical or vertical with described first polarization direction.Intensity/brightness through the white light of described upper polarizer is controlled by described control voltage.
Finally, through the white light of described upper polarizer on R or G or B color filter to present the colorama of corresponding bright on corresponding sub-pixel.A pixel generally includes R, G, B sub-pixel, therefore, and the light that pixel can be sent by its R, G, B sub-pixel of combination and present synthesis light.
But in the liquid crystal display device as shown in fig. 1, because white-light spectrum composition covers all wavelengths of visible ray, and the such as optical characteristics of the device of polaroid, liquid crystal and so on is all relevant with optical wavelength, and optical wavelength composition is more complicated, and optical homogeneity is poorer.Such as, same polaroid is different for the polarization degree of different wave length, and same liquid crystal layer is also different to the degree of deflection of different wave length under same driving voltage.Therefore, may there is color offset phenomenon in conventional liquid crystal display apparatus as shown in Figure 1.
As shown in Figure 2, schematically show according to the stacking figure of the optical device of the liquid crystal display of the embodiment of the present invention.
Ultraviolet LED or blue led are disposed in the side (such as, can be the combination in any of left side, right side, upside, downside) of light guide plate, and correspondingly produce ultraviolet light or near ultraviolet blue light as backlight.The ultraviolet light that ultraviolet LED or blue led send by light guide plate or near ultraviolet blue light become even light.In other words, similar with conventional liquid crystal display apparatus, light guide plate as area source, provides ultraviolet light or near ultraviolet blue light as backlight together with ultraviolet LED or blue led.
Light guide plate arranges lower polaroid, liquid crystal layer, upper polarizer and fluorescent film successively.
Ultraviolet light or near ultraviolet blue light incide on lower polaroid, and ultraviolet light or the near ultraviolet blue light only with the first polarization direction can through lower polaroids.Then, by applying control voltage to liquid crystal layer, the polarization direction through the ultraviolet light or near ultraviolet blue light that have the first polarization direction described in described lower polaroid is deflected.That is, the ultraviolet light of permeate crystal layer or the polarization direction of the near ultraviolet blue light polarization direction of certain angle that has been the basic upper deflecting in the first polarization direction.Next, ultraviolet light or the near ultraviolet blue light of permeate crystal layer incide on upper polarizer, ultraviolet light or the near ultraviolet blue light only with the second polarization direction can through upper polarizers, and described second polarization direction can be identical or vertical with described first polarization direction.Controlled by described control voltage through the ultraviolet light of described upper polarizer or the intensity/brightness of near ultraviolet blue light.
Finally, through the ultraviolet light of described upper polarizer or near ultraviolet blue light illumination on fluorescent film, visible ray is produced to bombard the fluorescent material be coated on fluorescent film.
The embodiment of the present invention is specifically described below in conjunction with Fig. 3, Fig. 4 and Fig. 5.
As shown in Figure 3, the process flow diagram of the liquid crystal display method 300 according to the embodiment of the present invention is schematically illustrated.
Liquid crystal display method 300 according to the embodiment of the present invention starts in step S301.
In step S310, ultraviolet light or near ultraviolet blue light is adopted to produce backlight.As shown in Figure 2, can adopt light guide plate together with ultraviolet LED or blue led as area source to produce the backlight of ultraviolet light or near ultraviolet blue light.Alternatively, light guide plate and other any point light source groups that can produce ultraviolet light or near ultraviolet blue light can be adopted to have unified as area source, produce the backlight of ultraviolet light or near ultraviolet blue light.Alternatively, can adopt other any can as area source to produce the configuration of the backlight of ultraviolet light or near ultraviolet blue light.
In step S320, utilize the first polaroid, the polarized light making to have in described backlight the first polarization direction through.
In step S330, apply control voltage to liquid crystal layer, the polarization direction described in making with the polarized light of the first polarization direction deflects.
In step S340, utilize the second polaroid, make polarization direction deflect after described polarized light in the polarized light component with the second polarization direction through.
Operation in step S320-S340 is similar to the corresponding operating in available liquid crystal display packing, does not repeat them here.
In step S350, utilize the described polarized light impact fluorescence film with the second polarization direction through the second polaroid, make fluorescent film produce visible ray, watch for beholder.
Then, in step S399, the liquid crystal display method 300 according to the embodiment of the present invention terminates.
In addition, although not shown in figure 3, the liquid crystal display method 300 according to the embodiment of the present invention can also comprise another step after step S350: absorb the polarized light described in the described ultraviolet light or near ultraviolet blue light that are not absorbed by described fluorescent film with the second polarization direction.
Below, the operation according to the step S350 in the liquid crystal display method 300 of the embodiment of the present invention will be specifically described.
Described fluorescent film divides pixel region and subpixel area accordingly with the pixel region of described liquid crystal layer and subpixel area, each pixel region comprises three subpixel area, each subpixel area can comprise one or more sub-pixel, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, apply the second fluorescent material in second subpixel area of each pixel region on described fluorescent film, in the 3rd subpixel area of each pixel region on described fluorescent film, apply the 3rd fluorescent material.
First fluorescent material produces the first primary lights, and the second fluorescent material produces the second primary lights, and the 3rd fluorescent material produces three primary colours light.Particularly, the described polarized light with the second polarization direction through the second polaroid bombards the first fluorescent material and produces the first primary lights, the described polarized light with the second polarization direction through the second polaroid bombards the second fluorescent material and produces the second primary lights, and described polarized light bombardment the 3rd fluorescent material with the second polarization direction through the second polaroid produces three primary colours light.
The image for beholder's viewing is synthesized by the first primary lights, the second primary lights and three primary colours light.Particularly, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
First example
In this example, described backlight has intensity peak at first wave length, second wave length and the 3rd wavelength place, and described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band.Preferably, described backlight intensity near first wave length reduces rapidly, and near second wave length, intensity reduces rapidly, the 3rd wavelength not only intensity reduce rapidly, and be approximately zero in other wavelength place intensity.
In this example, in step S350, particularly, utilize and there is at first wave length, second wave length and the 3rd wavelength place the polarized light described in intensity peak with the second polarization direction bombard the 3rd fluorescent material in the first fluorescent material in the first subpixel area, the second fluorescent material in the second subpixel area and the 3rd subpixel area.
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
Thus, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
Second example
In this example, described backlight has intensity peak in first wave strong point, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band.Preferably, described backlight intensity near first wave length reduces rapidly, and is approximately zero in other wavelength place intensity.
In this example, in step S350, particularly, utilize and in first wave strong point, there is the polarized light described in intensity peak with the second polarization direction and bombard the 3rd fluorescent material in the first fluorescent material in the first subpixel area, the second fluorescent material in the second subpixel area and the 3rd subpixel area.
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light.
Thus, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
As shown in Figure 4, the block diagram of liquid crystal display 400 is according to a first embodiment of the present invention schematically illustrated.
Liquid crystal display 400 according to a first embodiment of the present invention comprises backlight portion 410, first polaroid 420, liquid crystal layer 430, second polaroid 440 and the fluorescent film 450 sequentially arranged.
Described backlight portion 410 adopts ultraviolet light or near ultraviolet blue light to produce backlight.As shown in Figure 2, can adopt light guide plate together with ultraviolet LED or blue led as area source to produce the backlight of ultraviolet light or near ultraviolet blue light.Alternatively, light guide plate and other any point light source groups that can produce ultraviolet light or near ultraviolet blue light can be adopted to have unified as area source, produce the backlight of ultraviolet light or near ultraviolet blue light.Alternatively, can adopt other any can as area source to produce the configuration of the backlight of ultraviolet light or near ultraviolet blue light.
From the backlight that described backlight portion produces, namely ultraviolet light or near ultraviolet blue light incide on described first polaroid 420, the polarized light in the backlight that described first polaroid 420 makes described backlight portion produce with the first polarization direction through.
Through the polarized light with the first polarization direction of described first polaroid 420, ultraviolet light or the near ultraviolet blue light namely with the first polarization direction incide described liquid crystal layer 430.
Control voltage is applied to described liquid crystal layer 430, the polarization direction making to incide the ultraviolet light or near ultraviolet blue light having the first polarization direction described in described liquid crystal layer 430 deflects, and is the polarization direction (hereinafter referred to deflection polarization direction) on the basis of described first polarization direction with certain deflection angle thus through the ultraviolet light of described liquid crystal layer 430 or the polarization direction of near ultraviolet blue light.Described second polaroid 440 is incided through the ultraviolet light with described deflection polarization direction of described liquid crystal layer 430 or near ultraviolet blue light.
The polarized light component with the second polarization direction in described polarized light after described second polaroid 440 makes polarization direction deflect through, namely make to incide in the ultraviolet light with described polarization polarization direction of described second polaroid 440 or near ultraviolet blue light along the polarized light component of the second polarization direction through.Thus, ultraviolet light or the near ultraviolet blue light with the second polarization direction incide on fluorescent film 450.Described second polarization direction and described first polarization direction identical or different.Preferably, described second polarization direction is identical or vertical with described first polarization direction.
Produce visible ray through the bombardment with the polarized light of the second polarization direction of the second polaroid described in described fluorescent film 450 is subject to, watch for beholder.
Although not shown in the diagram, liquid crystal display 400 according to a first embodiment of the present invention can also comprise absorbing film, described absorbing film is disposed between described fluorescent film 450 and beholder, for absorbing the polarized light with the second polarization direction of described ultraviolet light or the near ultraviolet blue light do not absorbed by described fluorescent film 450.
In described liquid crystal display 400, with the pixel region of described liquid crystal layer 430 and subpixel area accordingly, described fluorescent film 450 correspondingly divides pixel region and subpixel area, each pixel region comprises three subpixel area, each subpixel area can comprise one or more sub-pixel, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, the second fluorescent material is applied in second subpixel area of each pixel region on described fluorescent film, the 3rd fluorescent material is applied in 3rd subpixel area of each pixel region on described fluorescent film.
First fluorescent material produces the first primary lights, and the second fluorescent material produces the second primary lights, and the 3rd fluorescent material produces three primary colours light.Particularly, the described polarized light with the second polarization direction through the second polaroid bombards the first fluorescent material and produces the first primary lights, the described polarized light with the second polarization direction through the second polaroid bombards the second fluorescent material and produces the second primary lights, and described polarized light bombardment the 3rd fluorescent material with the second polarization direction through the second polaroid produces three primary colours light.
The image for beholder's viewing is synthesized by the first primary lights, the second primary lights and three primary colours light.Particularly, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
First example
In this example, the described backlight that described backlight portion 410 produces has intensity peak at first wave length, second wave length and the 3rd wavelength place, and described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band.Preferably, described backlight intensity near first wave length reduces rapidly, and near second wave length, intensity reduces rapidly, the 3rd wavelength not only intensity reduce rapidly, and be approximately zero in other wavelength place intensity.
Through the ultraviolet light with the second polarization direction or the near ultraviolet blue light of described second polaroid 440, namely there is the ultraviolet light with the second polarization direction of intensity peak or near ultraviolet blue light illumination on fluorescent film 450 at first wave length, second wave length and the 3rd wavelength place.That is, utilize and there is at first wave length, second wave length and the 3rd wavelength place the polarized light described in intensity peak with the second polarization direction bombard the 3rd fluorescent material in the first fluorescent material in the first subpixel area, the second fluorescent material in the second subpixel area and the 3rd subpixel area.
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
Thus, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
Second example
In this example, the described backlight that described backlight portion 410 produces has intensity peak in first wave strong point, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band.Preferably, described backlight intensity near first wave length reduces rapidly, and is approximately zero in other wavelength place intensity.
In this example, through the ultraviolet light with the second polarization direction or the near ultraviolet blue light of described second polaroid 440, namely there is the ultraviolet light with the second polarization direction of intensity peak or near ultraviolet blue light illumination on fluorescent film 450 in first wave strong point.That is, utilize and in first wave strong point, there is the polarized light described in intensity peak with the second polarization direction and bombard the 3rd fluorescent material in the first fluorescent material in the first subpixel area, the second fluorescent material in the second subpixel area and the 3rd subpixel area.
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light.
Thus, for each pixel region, synthesized the pixel light of this pixel region by the three primary colours light produced in the second primary lights of producing in the first primary lights of producing in the first sub-pixel area, the second subpixel area and the 3rd subpixel area.
Although not shown in the diagram, total reflection film can also be furnished with, for improving the utilization ratio of backlight in the side relative with described first polaroid of described backlight portion 410.Therefore, in the case, the liquid crystal display 400 of Fig. 4 can be one side display device.
On the other hand, because fluorescent material is normally transparent, therefore likely fluorescent film is made transparent.Further, liquid crystal layer, polaroid etc. also can be made as transparent.Thus, in the case, described total reflection film can not be set, thus realize the Transparence Display of liquid crystal display.Described liquid crystal display can be implemented on glasses, vehicle glass, shop glass etc.
As shown in Figure 5, the block diagram of liquid crystal display 500 is according to a second embodiment of the present invention schematically illustrated.
Liquid crystal display 500 according to a second embodiment of the present invention comprises backlight portion 510, first polaroid 520, first liquid crystal layer 530, second polaroid 540 and the first fluorescent film 550 sequentially arranged, and also sequentially comprises the 3rd polaroid 560, second liquid crystal layer 570, the 4th polaroid 580 and the second fluorescent film 590 at the opposite side of backlight portion 510.
Backlight portion 510 with the similar or identical setting of backlight portion 410 as shown in Figure 4, can not repeat them here.
First polaroid 520 and the 3rd polaroid 560 can with the similar or identical settings of the first polaroid 420 as shown in Figure 4, first liquid crystal layer 530 and the second liquid crystal layer 570 can with the similar or identical settings of liquid crystal layer 430 as shown in Figure 4, second polaroid 540 and the 4th polaroid 580 with the similar or identical setting of the second polaroid 440 as shown in Figure 4, can not repeat them here.
The polarized light in the backlight that described 3rd polaroid 560 makes described backlight portion produce with the 3rd polarization direction through.Described 4th polaroid 580 make polarization direction deflect after described polarized light in the polarized light component with the 4th polarization direction through.3rd polarization direction and the 4th polarization direction can be identical or different.Preferably, the 3rd polarization direction is identical or vertical with the 4th polarization direction.
3rd polarization direction and the first polarization direction can be identical or different, and the 4th polarization direction and the second polarization direction can be identical or different.In order to structural design is simple, preferably, described first polarization direction is identical with described first polarization direction, and described 4th polarization direction is identical with described second polarization direction.
First fluorescent film 550 and the second fluorescent film 590 with the similar or identical setting of fluorescent film 450 as shown in Figure 4, can not repeat them here.
In the liquid crystal display 500 shown in Fig. 5, backlight portion 510 can comprise the first light guide plate and the first ultraviolet LED or blue led for providing backlight for the first polaroid 520 side, can also comprise the second light guide plate and the second ultraviolet LED or blue led for providing backlight for the 3rd polaroid 560 side.In the case, barrier film (two-sided total reflection film can be utilized to realize) can be arranged between the first light guide plate and the second light guide plate.Described first ultraviolet LED or blue led and the second ultraviolet LED or blue led can be same LED or different LED.
Alternatively, in the liquid crystal display 500 shown in Fig. 5, backlight portion 510 only can comprise a light guide plate and one group of ultraviolet LED or blue led for providing backlight for the first polaroid 520 side and the 3rd polaroid 560 side simultaneously.
Preferably, because fluorescent material is normally transparent, therefore likely fluorescent film is made transparent.Further, liquid crystal layer, polaroid etc. also can be made as transparent.
Thus, in the case, by being all made as transparent by backlight portion 510, first polaroid 520, first liquid crystal layer 530, second polaroid 540, first fluorescent film 550, the 3rd polaroid 560, second liquid crystal layer 570, the 4th polaroid 580 and the second fluorescent film 590 in described liquid crystal display 500, two-side transparent display can be realized.This can realize the Overlapping display of different user control role under can being applied to game application scenarios.
In addition, although not shown in Figure 5, described liquid crystal display 500 also comprises the first absorbing film, described first absorbing film is disposed between described fluorescent film 550 and beholder, for absorbing the polarized light with the second polarization direction of described ultraviolet light or the near ultraviolet blue light do not absorbed by described fluorescent film 550; And comprising the second absorbing film, described second absorbing film is disposed between described fluorescent film 590 and beholder, for absorbing the polarized light with the 4th polarization direction of described ultraviolet light or the near ultraviolet blue light do not absorbed by described fluorescent film 590.
According to liquid crystal display method and the liquid crystal display of the embodiment of the present invention, by adopting ultraviolet light or near ultraviolet blue light as backlight, its wave spectrum is very narrow, thus make polaroid more consistent to the operation of backlight with liquid crystal layer, reduce the color offset phenomenon of liquid crystal display, improve the display effect of liquid crystal display.Further, by being made as transparent by fluorescent film, polaroid, liquid crystal layer etc., Transparence Display can be realized.Further, by utilizing ultraviolet light or near ultraviolet blue light impact fluorescence material emission, can make the display characteristic of liquid crystal display and Autoluminescence close, can realize close to traditional C RT display color display effect.
Each embodiment of the present invention is described in detail above.But, it should be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, various amendment can be carried out to these embodiments, combination or sub-portfolio, and such amendment should fall within the scope of the present invention.
Claims (14)
1. a liquid crystal display method, comprising:
Ultraviolet light or near ultraviolet blue light is adopted to produce backlight;
Utilize the first polaroid, the polarized light making to have in described backlight the first polarization direction through;
Apply control voltage to liquid crystal layer, the polarization direction described in making with the polarized light of the first polarization direction deflects;
Utilize the second polaroid, make polarization direction deflect after described polarized light in the polarized light component with the second polarization direction through; And
Utilize the described polarized light impact fluorescence film with the second polarization direction through the second polaroid, make fluorescent film produce visible ray, watch for beholder.
2. liquid crystal display method as claimed in claim 1, wherein,
The visible ray that described fluorescent film produces is the first primary lights, the second primary lights and three primary colours light,
Described fluorescent film divides pixel region and subpixel area accordingly with the pixel region of described liquid crystal layer and subpixel area, each pixel region comprises three subpixel area, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, the second fluorescent material is applied in second subpixel area of each pixel region on described fluorescent film, the 3rd fluorescent material is applied in 3rd subpixel area of each pixel region on described fluorescent film, and
First fluorescent material produces the first primary lights, and the second fluorescent material produces the second primary lights, and the 3rd fluorescent material produces three primary colours light, synthesizes the image for beholder's viewing by the first primary lights, the second primary lights and three primary colours light.
3. liquid crystal display method as claimed in claim 2, wherein,
Described backlight has intensity peak at first wave length, second wave length and the 3rd wavelength place, and is approximately zero in the intensity at other wavelength place, and described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band,
Wherein, utilize the described polarized light impact fluorescence film with the second polarization direction through the second polaroid to make fluorescent film produce visible ray to comprise:
Utilize and there is at first wave length, second wave length and the 3rd wavelength place the polarized light described in intensity peak with the second polarization direction bombard the 3rd fluorescent material in the first fluorescent material in the first subpixel area, the second fluorescent material in the second subpixel area and the 3rd subpixel area, and
Described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
4. liquid crystal display method as claimed in claim 2, wherein,
Described backlight has intensity peak in first wave strong point, and is approximately zero in the intensity at other wavelength place, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band,
Wherein, described first fluorescent material is subject to the bringing out of light of described first wave length and produces described first primary lights; Described second fluorescent material is subject to the bringing out of light of described second wave length and produces described second primary lights; And described 3rd fluorescent material is subject to the bringing out of light of described 3rd wavelength and produces described three primary colours light.
5. liquid crystal display method as claimed in claim 1, also comprises:
Absorb the polarized light described in the described ultraviolet light or near ultraviolet blue light that are not absorbed by described fluorescent film with the second polarization direction.
6. liquid crystal display method as claimed in claim 1, wherein,
Described first polarization direction is identical with described second polarization direction, or described first polarization direction is vertical with described second polarization direction.
7. a liquid crystal display, comprising:
Backlight portion, for adopting ultraviolet light or near ultraviolet blue light to produce backlight;
First polaroid, be provided for the polarized light that in the backlight that described backlight portion produces there is the first polarization direction through;
Liquid crystal layer, the polarization direction described in being provided for the polarized light of the first polarization direction deflects;
Second polaroid, be provided for polarization direction deflection after described polarized light in the polarized light component with the second polarization direction through; And
Fluorescent film, produces visible ray through the bombardment with the polarized light of the second polarization direction of the second polaroid, watches for beholder described in being subject to.
8. liquid crystal display as claimed in claim 7, wherein,
With the pixel region of described liquid crystal layer and subpixel area accordingly, described fluorescent film correspondingly divides pixel region and subpixel area, each pixel region comprises three subpixel area, the first fluorescent material is applied in first subpixel area of each pixel region on described fluorescent film, the second fluorescent material is applied in second subpixel area of each pixel region on described fluorescent film, the 3rd fluorescent material is applied in 3rd subpixel area of each pixel region on described fluorescent film, and
The visible ray that described fluorescent film produces is the first primary lights, the second primary lights and three primary colours light, and the first fluorescent material produces the first primary lights, second fluorescent material produces the second primary lights, 3rd fluorescent material produces three primary colours light, synthesizes the image for beholder's viewing by the first primary lights, the second primary lights and three primary colours light.
9. liquid crystal display as claimed in claim 8, wherein,
The backlight that described backlight portion produces has intensity peak at first wave length, second wave length and the 3rd wavelength place, and be approximately zero in the intensity at other wavelength place, described first wave length, second wave length and the 3rd wavelength belong to ultraviolet light wave band or near ultraviolet blue wave band
Wherein, when described first fluorescent material of light bombardment of described first wave length, described first fluorescent material produces described first primary lights, and described first fluorescent material is to the optical transparency of described second wave length and described 3rd wavelength; When described second fluorescent material of light bombardment of described second wave length, described second fluorescent material produces described second primary lights, and described second fluorescent material is to the optical transparency of described first wave length and described 3rd wavelength; And when described 3rd fluorescent material of light bombardment of described 3rd wavelength, described 3rd fluorescent material produces described three primary colours light, and described 3rd fluorescent material is to the optical transparency of described first wave length and described second wave length.
10. liquid crystal display as claimed in claim 8, wherein,
The backlight that described backlight portion produces has intensity peak in first wave strong point, and is approximately zero in the intensity at other wavelength place, and described first wave length belongs to ultraviolet light wave band or near ultraviolet blue wave band,
Wherein, when described first fluorescent material of light bombardment of described first wave length, described first fluorescent material produces described first primary lights; When described second fluorescent material of light bombardment of described second wave length, described second fluorescent material produces described second primary lights; And when described 3rd fluorescent material of light bombardment of described 3rd wavelength, described 3rd fluorescent material produces described three primary colours light.
11. liquid crystal displays as claimed in claim 7, also comprise:
Absorbing film, is arranged between described fluorescent film and beholder, for absorbing the polarized light with the second polarization direction of described ultraviolet light or the near ultraviolet blue light do not absorbed by described fluorescent film.
12. liquid crystal displays as claimed in claim 7, wherein,
Described fluorescent film is made as transparent, and described liquid crystal layer and described first and second polaroids are also made as transparent, and described light guide plate is also made as transparent, makes to realize Transparence Display.
13. liquid crystal displays as claimed in claim 7, also comprise:
3rd polaroid, be provided for the polarized light that in the backlight that described backlight portion produces there is the 3rd polarization direction through;
Another liquid crystal layer, the polarization direction described in being provided for the polarized light of the 3rd polarization direction deflects;
4th polaroid, be provided for polarization direction deflection after described polarized light in the polarized light component with the 4th polarization direction through; And
Another fluorescent film, produces visible ray through the bombardment with the polarized light of the 4th polarization direction of the 4th polaroid described in being subject to, for beholder's viewing,
Wherein, described first polaroid and described 3rd polaroid lay respectively at the relative both sides of described backlight portion.
14. liquid crystal displays as claimed in claim 7, wherein,
Described first polarization direction is identical with described second polarization direction, or described first polarization direction is vertical with described second polarization direction.
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