US20170146859A1 - Quantum-dot embedded polarizer component and display device using same - Google Patents
Quantum-dot embedded polarizer component and display device using same Download PDFInfo
- Publication number
- US20170146859A1 US20170146859A1 US14/947,430 US201514947430A US2017146859A1 US 20170146859 A1 US20170146859 A1 US 20170146859A1 US 201514947430 A US201514947430 A US 201514947430A US 2017146859 A1 US2017146859 A1 US 2017146859A1
- Authority
- US
- United States
- Prior art keywords
- light
- sub
- layer
- component
- cell
- 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.)
- Abandoned
Links
- 239000002096 quantum dot Substances 0.000 title claims abstract description 51
- 230000005284 excitation Effects 0.000 claims abstract description 42
- 239000012788 optical film Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 70
- 230000010287 polarization Effects 0.000 claims description 36
- 239000000758 substrate Substances 0.000 claims description 35
- 239000004973 liquid crystal related substance Substances 0.000 claims description 19
- 238000000151 deposition Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000000149 argon plasma sintering Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 99
- 210000004027 cell Anatomy 0.000 description 17
- 239000010408 film Substances 0.000 description 16
- 239000012530 fluid Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 3
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- YBNMDCCMCLUHBL-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-pyren-1-ylbutanoate Chemical compound C=1C=C(C2=C34)C=CC3=CC=CC4=CC=C2C=1CCCC(=O)ON1C(=O)CCC1=O YBNMDCCMCLUHBL-UHFFFAOYSA-N 0.000 description 1
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
- G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- 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
-
- 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
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
-
- 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
- G02F1/133621—Illuminating devices providing coloured light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/36—Micro- or nanomaterials
Definitions
- the present invention relates generally to a color display and, in particular, to a liquid crystal display.
- LCD liquid crystal displays
- the LCD panel may comprise a top polarizer, a lower polarizer, a liquid crystal cell, and a backlight. Light from the backlight passes through the lower polarizer, through the liquid crystal cell, and then through the top polarizer.
- the liquid crystal cell may comprise a lower glass substrate and an upper substrate containing color filters.
- a plurality of pixels comprising thin film transistor (TFT) devices may be formed in an array on the lower glass substrate, and a liquid crystal compound may be filled into the space between the lower glass substrate and the color filter forming a layer of liquid crystal material.
- a hardening protective layer may be placed on the top polarizer and it may be advantageous to apply the anti-glaring treatment to the lower polarizer.
- the LCD backlight unit may be configured as a direct-type backlight, as disclosed for example in Yu et al., U.S. Pat. No. 7,101,069, which is assigned to AU Optronics Corp., the parent company of the assignee of the current application, and hereby incorporated by reference in its entirety.
- the backlight unit may comprise a diffuser, with one or more diffusing plates and/or prisms disposed on the diffuser.
- a reflecting plate may be disposed under the diffuser, with one or more illumination tubes as the light source disposed between the diffuser and the reflecting plate.
- the LCD backlight unit may also be configured as an edge-type backlight, as disclosed for example in Chu et al., U.S. Pat. No. 6,976,781, which is assigned to AU Optronics Corp., the parent company of the assignee of the current application, and hereby incorporated by reference in its entirety.
- the backlight unit may comprise a tubular lamp and a light guide plate as the light sources and also a bezel which may have a rectangular board. Reflector sheet, the light guide panel and one or more optical films may be disposed in sequence on the rectangular board.
- a frame may be mounted on the bezel to contain these components.
- each pixel has at least three color sub-pixels.
- Red, green and blue color filters are used in the respective color sub-pixels to form a color image on the display screen.
- the red, green and blue color filters separate the white light provided by the backlight unit into red, green and blue light components.
- Each of the red, green and blue color filters transmits only light of a narrow wavelength range and absorbs the rest of the visible spectrum. As such, the optical loss is significant. In most cases, the optical loss can be 70 percent.
- the present invention is directed to a quantum-dot embedded polarizer that can increase the brightness of the display panel and achieve the high color gamut solution with high efficiency.
- a quantum-dot embedded polarizer that can increase the brightness of the display panel and achieve the high color gamut solution with high efficiency.
- the heat generated by the light source can be avoided and the efficiency of quantum dots can be increased.
- a wavelength selecting layer is applied beneath the quantum dot layer so that most of the red light generated from red quantum dots pass through the red color filter and most of the green light generated from green quantum dots pass through the green color filter.
- the blue light generated from blue backlight or blue quantum dots can be recycled inside the backlight module.
- a reflective polarizing layer made upon the quantum dot layer can increase the brightness by reflect the light that is normally absorbed by a bottom polarizer.
- the first aspect of the present invention is a polarizer component, which comprises: a polarizing layer; an optical film configured to receive an excitation light; and a light re-emitting layer disposed between the polarizing layer and the optical film, wherein the light re-emitting layer comprises a plurality of light re-emitting cells, each cell comprising at least a first sub-cell, a second sub-cell and a third sub-cell, the first sub-cell comprising a first light re-emitting material configured to emit a first light component in a first wave-length range in response to the excitation light, the second sub-cell comprising a second light re-emitting material configured to emit a second light component in a second wave-length range in response to the excitation light, the third sub-cell configured to provide a third light component in response to the excitation light, wherein the first re-emitting material comprises a first quantum dot material arranged to emit the first light component, the second re-emitting
- the third sub-cell comprising a third light re-emitting material, the third light re-emitting material comprising a third quantum dot material configured to emit the third light component in a fourth wavelength range in response to the excitation light in an ultra-violet wavelength range from 290 to 400 nm, and the fourth wavelength range is in the 440-460 nm range.
- the polarizing layer configured to transmit light in a first polarization and to reflect light in a different second polarization.
- the polarizing layer is configured to transmit light in a first polarization and to partially reflect light in a different second polarization and to partially absorb light in the second polarization.
- the polarizing layer comprises a first polarizing sub-layer configured to transmit light in a first polarization and to reflect light in a second polarization different from the first polarization, and a second polarizing sub-layer configured to transmit light in the first polarization and to absorb light in the second polarization.
- the first polarizing sub-layer is provided between the second polarizing sub-layer and the light re-emitting layer.
- the second aspect of the present invention is a display device, which comprises:
- a display panel having a first side and an opposing second side
- a polarizing component as described above disposed between the first side of the display panel and the light source;
- a second polarizing component located on the second side of the display panel, wherein the light source is arranged to provide the excitation light.
- the display further comprises a reflective surface positioned in relationship to the light source, arranged to reflect at least part of the excitation light through the light source toward the polarizer component.
- the display panel comprises a first substrate on the first side, a second substrate on the second side and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the polarizing layer of the polarizer component is disposed adjacent to the first substrate of the display panel, the display panel comprising a plurality of pixels, each pixel arranged to receive light from a light re-emitting cell in the light re-emitting layer, each pixel comprising at least a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, and wherein the first sub-cell in said light re-emitting cell is arranged to provide the first light component to the first color sub-pixel, the second sub-cell in said light re-emitting cell is arranged to provide the second light component to the second color-sub-pixel, and the third sub-cell in said light re-emitting cell is arranged to provide the third light component to the third color sub-pixel.
- the display panel further comprises a color filter layer associated with the plurality of pixels, the color filter layer arranged to provide a first filter element configured to filter the first light component provided to the first color sub-pixel, a second filter element configured to filter the second light component provided to the second color sub-pixel, and a third filter element configured to filter the third light component provided to the third color sub-pixel, wherein the first filter element is a red filter, the second filter element is a green filter and the third filter element is a blue filter.
- the color filter layer is disposed on the first substrate of the display panel, between the liquid crystal layer and the first substrate.
- the color filter layer is disposed on the second substrate of the display panel, between the liquid crystal layer and the second substrate.
- the third aspect of the present invention is a method for producing a polarizer component as described above, the method comprising:
- either the surface of the polarizing layer or the surface of the optical film provides the surface for the light re-emitting layer.
- the method further comprises:
- the third quantum dot material configured to emit the third light component in a 440-460 nm wavelength range in response to the excitation light which is in the ultra-violet wavelength range.
- the method further comprises depositing a scattering material in the position of the third sub-cell.
- the depositing comprises causing one or more nozzles to dispense droplets containing the first light re-emitting material in the position of the first sub-cell and to dispense droplets containing the second light re-emitting material in the position of the second sub-cell.
- the depositing further comprises causing one or more nozzles to dispense droplets containing the third light re-emitting material or a scattering material in the position of the third sub-cell.
- the optical film comprises a polymer layer
- the method further comprises
- the indents comprising a first indent in the position of the first sub-cells; a second indent in the position of the second sub-cells and a third indent in the position of the third sub-cells, the first indent arranged to receive the first light re-emitting material, the second indent arranged to receive the second light re-emitting material, and the third indent arranged to receive the third light re-emitting material or a light scatting material.
- FIG. 1 illustrates a typical display device.
- FIG. 2 illustrates a color pixel in a typical display device.
- FIG. 3 is a graphical representation of a typical quantum dot.
- FIG. 4 a illustrates a light re-emitting layer, according to one embodiment of the present invention.
- FIG. 4 b illustrates a light re-emitting layer, according to another embodiment of the present invention.
- FIG. 4 c illustrates a light re-emitting layer, according to yet another embodiment of the present invention.
- FIG. 4 d illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown in FIG. 4 a in response to an excitation light.
- FIG. 4 e illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown in FIG. 4 b in response to an excitation light.
- FIG. 4 f illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown in FIG. 4 c in response to an excitation light.
- FIG. 5 a illustrates a polarizer component, according to one embodiment of the present invention.
- FIG. 5 b illustrates a polarizer component, according to another embodiment of the present invention.
- FIG. 6 a illustrates a display device, according to one embodiment of the present invention.
- FIG. 6 b illustrates a display device, according to another embodiment of the present invention.
- FIG. 7 a illustrates a polarizing layer, according to one embodiment of the present invention.
- FIG. 7 b illustrates a polarizing filter attached to a reflective polarizing layer to form the polarizing layer of FIG. 7 a , according to an embodiment of the present invention.
- FIG. 7 c illustrates a polarizing layer, according to another embodiment of the present invention.
- FIG. 7 d illustrates a polarizing layer, according to yet another embodiment of the present invention.
- FIG. 8 a illustrates a display panel, according to one embodiment of the present invention.
- FIG. 8 b illustrates a display panel, according to another embodiment of the present invention.
- FIG. 9 illustrates the arrangement of a light source in relationship to the polarizer component, according to an embodiment of the present invention.
- FIG. 10 a illustrates a method for producing a polarizer component, according to one embodiment of the present invention.
- FIG. 10 b illustrates a method for producing a polarizer component, according to another embodiment of the present invention.
- FIG. 10 c illustrates a method for producing a polarizer component, according to yet another embodiment of the present invention.
- FIG. 10 d illustrates a method for producing a polarizer component, according to a different embodiment of the present invention.
- FIG. 10 e illustrates a method for producing a polarizer component, according to a further embodiment of the present invention.
- FIG. 10 f illustrates a method for producing a polarizer component, partly based on the embodiment as shown in FIGS. 10 d and 10 e.
- FIG. 10 g illustrates a different method for producing a polarizer component also partly based on the embodiment as shown in FIGS. 10 d and 10 e.
- the present invention is directed to a quantum-dot embedded polarizer component and a color display device having such a polarizer component.
- the color display device has a plurality of color pixels defined by a color filter layer and a liquid crystal display panel as shown in FIGS. 8 a and 8 b .
- the color pixels can be arranged in rows and columns similar to the pixels 10 in a typical display 1 as shown in FIG. 1 .
- the display device 1 has a display panel 6 on which the plurality of pixels 10 are arranged, and a data driver 4 and a gate driver 8 for providing image data and timing data to the display device 6 .
- the pixel 10 is a color pixel, it may have three or more color sub-pixels, such as a red pixel 22 , a green pixel 24 and a blue green pixel 26 , as shown in FIG. 2 .
- the quantum dot embedded polarizer component is illustrated in FIG. 5 a , and its arrangement in a color display device is shown in FIGS. 6 a and 6 b .
- the quantum dot embedded polarizer component 110 has at least three layers: a polarizing layer 60 , 60 ′ or 60 ′′, an optical film 80 and a light re-emitting layer 40 , 40 ′ or 40 ′′ disposed between the polarizing layer 60 , 60 ′ or 60 ′′ and the optical film 80 .
- the light re-emitting layer 40 , 40 ′ or 40 ′′ has a plurality of light re-emitting cells in arranged to provide different color light components to a color pixel.
- the light re-emitting cell 40 , 40 ′ or 40 ′′, as shown in FIGS. 4 a , 4 b , 4 c , 4 d , 4 e and 4 f comprises a first sub-cell 32 , a second sub-cell 34 , and a third sub-cell 36 , 36 ′ or 36 ′′.
- the first sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising a blue wavelength range.
- the second sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light.
- the third sub-cell 36 can be blank or a layer of transparent material and is arranged to transmit at least part of the excitation light received in the third sub-cell 36 for providing the third light component in the blue wavelength range.
- the red wavelength range includes a peak wavelength in a range from 600 to 680 nm
- the green wavelength range includes a peak wavelength in a range from 515 to 550 nm
- the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm.
- the first sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising a blue wavelength range.
- the second sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light.
- the third sub-cell 36 ′ has a transparent material containing scattering particles configured to transmit and scatter at least part of the excitation light received in the third sub-cell 36 ′ for providing the third light component in the blue wavelength range.
- the red wavelength range includes a peak wavelength in a range from 600 to 680 nm
- the green wavelength range includes a peak wavelength in a range from 515 to 550 nm
- the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm.
- the first sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising an ultra violet wavelength range.
- the second sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light.
- the third sub-cell 36 ′′ has a layer of third quantum dot material configured to emit a third light component in a blue wavelength range in response to the same excitation light.
- the red wavelength range includes a peak wavelength in a range from 600 to 680 nm
- the green wavelength range includes a peak wavelength in a range from 515 to 550 nm
- the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm
- the ultra light wavelength range includes a peak wavelength in a range from 290 to 400 nm.
- the layers 60 , 60 ′ or 60 ′′ and 80 and the layer 40 , 40 ′ or 40 ′′ in the polarizer component 110 are fixedly attached to each other as a single optical component to be used in a color display device 100 as shown in FIGS. 6 a and 6 b .
- the mura phenomena can be erased when there is no air gap between layers 60 , 60 ′ or 60 ′′ and 80 and the layer, 40 , 40 ′ or 40 ′′.
- the polarizer component 110 is laminated between two protective layers 112 and 114 as shown in FIG. 5 b in order to protect the quantum dot materials embedded in the polarizer component 110 from humidity, for example.
- the protective layers 112 and 114 can be glass substrates, for example. It should be noted that, since the polarizer component 110 is attached to the lower substrate 98 of the display panel 90 as shown in FIGS. 8 a and 8 b , the protective layer 112 can be omitted.
- the display device has a display panel, such as a liquid crystal display panel 90 and a light source 140 .
- the display panel 90 has a lower side and an opposing top side, and the quantum-dot embedded polarizer component 110 is disposed between the lower side of the display panel 90 and the light source 140 .
- the light source 140 is arranged to provide the excitation light to the light re-emitting layer 40 , 40 ′, and 40 ′′ in the polarizer component 110 .
- the display device 100 also has a top polarizer 70 disposed on the top side of the display panel 90 .
- the light source 140 can be an edge-light type having a blue LED and a light guide panel arranged to redirect the excitation light from the blue LED, for example.
- the light source 140 can also be a direct-light type light source without a light guide panel.
- the display device 100 may have a reflecting surface 150 arranged to reflect part of excitation light through the light source toward the polarizer component 110 .
- the quantum-dot embedded polarizer component 110 can have different layer structures as shown in FIGS. 7 a -7 d .
- the polarizing layer 60 ′′ is a reflective polarizing layer 62 .
- the reflective polarizing layer 62 is configured to transmit light in a first polarization direction and to reflect light in a different second polarization direction. In this arrangement, the light in the second polarization direction is recycled as the reflected light is directed toward the optical film 80 through the light re-emitting layer 40 , 40 ′ or 40 ′′.
- the polarizing layer 60 has two sub-layers: a polarizing filter 61 and a reflective polarizing layer 62 .
- the reflective polarizing layer 62 is configured to transmit light in a first polarization direction and to reflect light in a different second polarization direction.
- the polarizing filter 61 is configured to transmit light in one polarization direction and absorb light in another polarization direction.
- the polarizing filter 61 can be a polarizing sheet composed of a polyvinyl alcohol (PVA) film 66 laminated between two cellulose triacetate (TAC) films 64 and 68 , as shown in FIG. 7 b .
- PVA polyvinyl alcohol
- TAC cellulose triacetate
- the PVA film 66 has been stretched in a certain direction to define its polarization axis so that the PVA film can be used to transmit light having a polarization direction parallel to the polarization axis and to block light having a polarization direction perpendicular to the polarization axis.
- the polarizing filter 61 can be attached to the reflective polarizing layer 62 by an adhesive layer.
- the polarizing layer 60 ′ is an enhanced reflective polarizing layer as shown in FIG. 7 c .
- the enhanced reflective polarizing layer is configured to transmit light in a first polarization direction and to partially reflect light in a different second polarization direction and to partially absorb light in the second polarization.
- the enhanced reflective polarizing layer may have diffused surface (not shown) for brightness enhancement and improving brightness uniformity.
- FIG. 6 b is a display device, according to another embodiment of the present invention.
- the display device shown in FIG. 6 b is similar to the embodiment of FIG. 6 a .
- the difference is that the polarizing layer 60 ′′ in the polarizer component 110 is a reflective polarizing layer 62 and another bottom polarizer 72 is disposed between the lower side of the display panel 90 and the polarizer component 110 .
- the optical film 80 on the polarizer component 110 can be a transparent optical film, a diffuser or a wavelength-selecting layer.
- the wavelength-selecting layer can reflect red and green light to the light re-emitting layer 40 or 40 ′ and transmit blue light. In this arrangement, the blue light is recycled and the reflected red and green light are redirected toward the display panel 90 .
- the wavelength-selecting layer can reflect red, green and blue light to the light re-emitting layer 40 ′′ and transmit ultra violet light. In this arrangement, the reflected red, green and blue light are redirected toward display panel 90 .
- the wavelength-selecting layer can reflect red and green light to the light re-emitting layer 40 ′′ and transmit ultra violet and blue light. In this arrangement, the blue light is recycled and the reflected red light and green light are redirected toward the display panel 90 .
- the display panel 90 has a lower substrate 98 on the lower side and an upper substrate 92 on the top side, and a liquid crystal layer 96 disposed between the lower substrate 98 and the upper substrate 92 . It is known in the art that the liquid crystal layer is controlled by electrodes and other electronic components (not shown) provided on the first and second substrates.
- the display device 90 has a color filter layer 94 disposed on the upper substrate 92 between the upper substrate 92 and the liquid crystal layer 96 , as shown in FIG. 8 a .
- the color filter layer 94 has a plurality of color filter segments 190 .
- Each of the color filter segments 190 is associated with a color pixel and a light re-emitting cell 30 on the polarizer component 110 .
- Each color filter segment 190 has a first color filter 192 arranged to filter the first light component emerged from the first sub-cell 32 ; a second filter 194 arranged to the filter the second light component emerged from the second sub-cell 34 ; and a third filter 196 arranged to filter the third light component emerged from the third sub-cell 36 .
- the first color filter 192 can be a red color filter R
- the second color filter 194 can be a green filter G
- the third color filter 196 can be a blue filter B, for example.
- the color filter layer 94 is disposed on the lower substrate 98 between the lower substrate 98 and the liquid crystal layer 96 , as shown in FIG. 8 b.
- FIG. 9 shows the arrangement of light source 140 in relationship to the polarizer component 110 .
- the polarizer component 110 can be directly attached or placed adjacent to the light source 140 .
- one or more optical films 138 can be disposed between the light source 140 and the polarizer component 110 , as shown in FIG. 9 .
- One or each of the optical films 138 can be a transparent polymer film, a glass substrate such as substrate 114 as shown in FIG. 5 b .
- the optical films 138 can also be diffusers.
- the reflecting surface 150 can be a reflector arranged to reflect the light from the light source 140 toward polarizer component 110 .
- the present invention is also directed to a method for producing the polarizer component 110 .
- the method is concerned with producing the light re-emitting layer 40 , 40 ′ or 40 ′′ as shown in FIG. 5 a .
- the method includes providing a surface for depositing the light re-emitting materials.
- the surface can be the surface of the optical film 80 or the polarizing layer 60 (see FIG. 5 a ). As shown in FIG.
- a depositing apparatus such as an inkjet printer having two or more nozzles is used to dispense droplets containing the first light re-emitting material (first quantum dot material) and droplets containing the second light re-emitting material (second quantum dot material) onto the surface so as to form the first sub-cells 32 and the second sub-cells 34 in the light re-emitting cells 30 .
- the “ink” dispensed from the inkjet printer can be a mixture of solid particles of quantum dots and a clear fluid.
- the clear fluid can be a thermosetting adhesive, a UV-curable glue or epoxy or a combination thereof, for example.
- the depositing apparatus have nozzles to dispense droplet containing only the clear fluid onto the surface to form the third sub-cells 36 .
- the depositing apparatus have nozzles to dispense droplet containing the clear fluid and a scattering material onto the surface to form the third sub-cells 36 ′.
- the depositing apparatus have nozzles to dispense droplet containing the clear fluid and a third light re-emitting material (third quantum dot material) onto the surface to form the third sub-cells 36 ′′.
- an additional optical film 82 attached to the optical film 80 is used to provide the surface, as shown in FIG. 10 b .
- a depositing apparatus such as an inkjet printer having two or more nozzles is used to dispense droplets containing the first light re-emitting material (first quantum dot material) and droplets containing the second light re-emitting material (second quantum dot material) onto the surface so as to form the first sub-cells 32 and the second sub-cells 34 in the light re-emitting cells 30 .
- an additional film 82 attached to the polarizing layer 60 is used to provide the surface, as shown in FIG. 10 c.
- the surface of the optical film 80 or the polarizing layer 60 is modified to produce a plurality of indents or pockets so that quantum dot materials can be deposited in the indents or pockets to form the sub-cells in a light re-emitting cell 30 .
- the surface-modified film 80 or 60 has a plurality of cup-like indents.
- the side surfaces of each indent can be used as reflectors to redirect part of the light component in each sub-cell toward the display panel 90 (see FIG. 6 ) when forming on the optical film 80 .
- a surface-modified film can be made in different ways.
- the indents or pockets can be made by engraving, embossing or stamping.
- the surface-modified film can be made of PMMA, PC, PET or the like.
- the surface of the additional film 84 attached to the optical film 80 or the polarizing layer 60 is modified to produce a plurality of indents or pockets so that quantum dot materials can be deposited in the indents or pockets to form the sub-cells in a light re-emitting cell 30 , as shown in FIG. 10 e.
- a third light re-emitting material (third quantum dot material) is also deposited in the third sub-cell 36 ′′ in the light re-emitting cells 30 , on the cup-like indents either on the surface modified film 80 , the surface modified film 60 or on the surface of the additional film 84 , as shown in FIG. 10 f.
- a scattering material is also deposited in the third sub-cell 36 ′, on the cup-like indents either on the surface modified film 80 , the surface modified film 60 or on the surface of the additional film 84 , as shown in FIG. 10 g.
- FIG. 3 is a graphical representation of a quantum dot.
- a quantum dot is a crystal of semiconductor material whose diameter is on the order of several nanometers—a size which results in its free charge carriers experiencing quantum confinement in its spatial dimensions.
- a quantum dot has a core and a shell.
- the core can be made of CdSe, ZnSe, CdS, MnSe, InP, PbSe and CdTe, for example.
- the shell can be made of ZnS, ZnSe, CdS and PbS, for example.
- the function of the core is to provide the band gap and, thus, to control the color of the re-emitted light. The color is also controlled by the composition of the core.
- the shell passivates the defects on the core surface.
- quantum dots are also provided with caps or ligand having the composition of CH 2 CH 2 CH 2 CH 2 SH, mainly used for dispersion in a solution.
- the first, second and third wavelength ranges emerged from the first, second and third quantum dot materials can be selected by controlling the size distribution and the composition of the quantum dots.
- the first wavelength range can be selected to match the characteristics of a red color filter
- the second wavelength range can be selected to match the characteristics of a green color filter
- the third wavelength range can be selected to match the characteristics of a blue color filter.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
A polarizer component has an optical film to receive excitation light, a light re-emitting layer and a polarizing layer. The light re-emitting layer has quantum dots that re-emit red light and quantum dots that re-emit green light in response to the excitation light. The re-emitted red light is provided to a red sub-pixel to be filtered by a red color filter, and the re-emitting green light is provided to a green sub-pixel to be filtered by a green color filter. The excitation light can be blue or ultra violet and part of the excitation light is provided to a blue sub-pixel. The polarizing layer can be a reflective polarizing layer and the optical film can be a wavelength selecting layer. The light re-emitting layer may contain scattering particles to diffuse the excitation light provided to a blue sub-pixel.
Description
- The present invention relates generally to a color display and, in particular, to a liquid crystal display.
- Liquid crystal displays (LCD) are widely used in electronic devices, such as laptops, smart phones, digital cameras, billboard-type displays, and high-definition televisions. LCD panels may be configured as disclosed, for example, in Wu et al., U.S. Pat. No. 6,956,631, which is assigned to AU Optronics Corp., the parent company of the assignee of the current application, and hereby incorporated by reference in its entirety. As disclosed in Wu et al.
FIG. 1 , the LCD panel may comprise a top polarizer, a lower polarizer, a liquid crystal cell, and a backlight. Light from the backlight passes through the lower polarizer, through the liquid crystal cell, and then through the top polarizer. As further disclosed in Wu et al.FIG. 1 , the liquid crystal cell may comprise a lower glass substrate and an upper substrate containing color filters. A plurality of pixels comprising thin film transistor (TFT) devices may be formed in an array on the lower glass substrate, and a liquid crystal compound may be filled into the space between the lower glass substrate and the color filter forming a layer of liquid crystal material. A hardening protective layer may be placed on the top polarizer and it may be advantageous to apply the anti-glaring treatment to the lower polarizer. - The LCD backlight unit may be configured as a direct-type backlight, as disclosed for example in Yu et al., U.S. Pat. No. 7,101,069, which is assigned to AU Optronics Corp., the parent company of the assignee of the current application, and hereby incorporated by reference in its entirety. As disclosed in Yu et al.
FIG. 3 , the backlight unit may comprise a diffuser, with one or more diffusing plates and/or prisms disposed on the diffuser. A reflecting plate may be disposed under the diffuser, with one or more illumination tubes as the light source disposed between the diffuser and the reflecting plate. - The LCD backlight unit may also be configured as an edge-type backlight, as disclosed for example in Chu et al., U.S. Pat. No. 6,976,781, which is assigned to AU Optronics Corp., the parent company of the assignee of the current application, and hereby incorporated by reference in its entirety. As disclosed in Chu et al.,
FIG. 4 , the backlight unit may comprise a tubular lamp and a light guide plate as the light sources and also a bezel which may have a rectangular board. Reflector sheet, the light guide panel and one or more optical films may be disposed in sequence on the rectangular board. A frame may be mounted on the bezel to contain these components. - In general, each pixel has at least three color sub-pixels. Red, green and blue color filters are used in the respective color sub-pixels to form a color image on the display screen. The red, green and blue color filters separate the white light provided by the backlight unit into red, green and blue light components. Each of the red, green and blue color filters transmits only light of a narrow wavelength range and absorbs the rest of the visible spectrum. As such, the optical loss is significant. In most cases, the optical loss can be 70 percent.
- Reducing the optical loss is, therefore, an important issue in the color display technology.
- The present invention is directed to a quantum-dot embedded polarizer that can increase the brightness of the display panel and achieve the high color gamut solution with high efficiency. Through integrating quantum dots with polarizing film, the heat generated by the light source can be avoided and the efficiency of quantum dots can be increased. A wavelength selecting layer is applied beneath the quantum dot layer so that most of the red light generated from red quantum dots pass through the red color filter and most of the green light generated from green quantum dots pass through the green color filter. The blue light generated from blue backlight or blue quantum dots can be recycled inside the backlight module. Also a reflective polarizing layer made upon the quantum dot layer can increase the brightness by reflect the light that is normally absorbed by a bottom polarizer.
- Thus, the first aspect of the present invention is a polarizer component, which comprises: a polarizing layer; an optical film configured to receive an excitation light; and a light re-emitting layer disposed between the polarizing layer and the optical film, wherein the light re-emitting layer comprises a plurality of light re-emitting cells, each cell comprising at least a first sub-cell, a second sub-cell and a third sub-cell, the first sub-cell comprising a first light re-emitting material configured to emit a first light component in a first wave-length range in response to the excitation light, the second sub-cell comprising a second light re-emitting material configured to emit a second light component in a second wave-length range in response to the excitation light, the third sub-cell configured to provide a third light component in response to the excitation light, wherein the first re-emitting material comprises a first quantum dot material arranged to emit the first light component, the second re-emitting material comprises a second quantum dot material arranged to emit the second light component, and wherein the first wavelength range is in the 600-680 nm range; the second wavelength range is in the 515-550 nm range; and the excitation light and the third light component comprise a third wavelength range in the 440-460 nm range, and wherein the optical film and the light re-emitting layer are arranged such that the excitation light is provided to the light re-emitting layer through the optical film, and wherein the optical film comprises a wavelength selecting layer configured to reflect light in the first wavelength range and light in the second wavelength range and to transmit light in the third wavelength range.
- According to an embodiment of the present invention, the third sub-cell comprising a third light re-emitting material, the third light re-emitting material comprising a third quantum dot material configured to emit the third light component in a fourth wavelength range in response to the excitation light in an ultra-violet wavelength range from 290 to 400 nm, and the fourth wavelength range is in the 440-460 nm range.
- According to an embodiment of the present invention, the polarizing layer configured to transmit light in a first polarization and to reflect light in a different second polarization.
- According to an embodiment of the present invention, the polarizing layer is configured to transmit light in a first polarization and to partially reflect light in a different second polarization and to partially absorb light in the second polarization.
- According to an embodiment of the present invention, the polarizing layer comprises a first polarizing sub-layer configured to transmit light in a first polarization and to reflect light in a second polarization different from the first polarization, and a second polarizing sub-layer configured to transmit light in the first polarization and to absorb light in the second polarization.
- According to an embodiment of the present invention, the first polarizing sub-layer is provided between the second polarizing sub-layer and the light re-emitting layer.
- The second aspect of the present invention is a display device, which comprises:
- a display panel having a first side and an opposing second side;
- a light source;
- a polarizing component as described above disposed between the first side of the display panel and the light source; and
- a second polarizing component located on the second side of the display panel, wherein the light source is arranged to provide the excitation light.
- According to an embodiment of the present invention, the display further comprises a reflective surface positioned in relationship to the light source, arranged to reflect at least part of the excitation light through the light source toward the polarizer component.
- According to an embodiment of the present invention, the display panel comprises a first substrate on the first side, a second substrate on the second side and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the polarizing layer of the polarizer component is disposed adjacent to the first substrate of the display panel, the display panel comprising a plurality of pixels, each pixel arranged to receive light from a light re-emitting cell in the light re-emitting layer, each pixel comprising at least a first color sub-pixel, a second color sub-pixel and a third color sub-pixel, and wherein the first sub-cell in said light re-emitting cell is arranged to provide the first light component to the first color sub-pixel, the second sub-cell in said light re-emitting cell is arranged to provide the second light component to the second color-sub-pixel, and the third sub-cell in said light re-emitting cell is arranged to provide the third light component to the third color sub-pixel.
- According to an embodiment of the present invention, the display panel further comprises a color filter layer associated with the plurality of pixels, the color filter layer arranged to provide a first filter element configured to filter the first light component provided to the first color sub-pixel, a second filter element configured to filter the second light component provided to the second color sub-pixel, and a third filter element configured to filter the third light component provided to the third color sub-pixel, wherein the first filter element is a red filter, the second filter element is a green filter and the third filter element is a blue filter.
- According to an embodiment of the present invention, the color filter layer is disposed on the first substrate of the display panel, between the liquid crystal layer and the first substrate.
- According to an embodiment of the present invention, the color filter layer is disposed on the second substrate of the display panel, between the liquid crystal layer and the second substrate.
- The third aspect of the present invention is a method for producing a polarizer component as described above, the method comprising:
- providing a surface for the light re-emitting layer; and
- depositing the first light re-emitting material in the position of the first sub-cell and depositing the second light re-emitting material in the position of the second sub-cell.
- According to an embodiment of the present invention, either the surface of the polarizing layer or the surface of the optical film provides the surface for the light re-emitting layer.
- According to an embodiment of the present invention, the method further comprises:
- depositing a third quantum dot material in the position of the third sub-cell, the third quantum dot material configured to emit the third light component in a 440-460 nm wavelength range in response to the excitation light which is in the ultra-violet wavelength range.
- According to an embodiment of the present invention, the method further comprises depositing a scattering material in the position of the third sub-cell.
- According to an embodiment of the present invention, the depositing comprises causing one or more nozzles to dispense droplets containing the first light re-emitting material in the position of the first sub-cell and to dispense droplets containing the second light re-emitting material in the position of the second sub-cell.
- According to an embodiment of the present invention, the depositing further comprises causing one or more nozzles to dispense droplets containing the third light re-emitting material or a scattering material in the position of the third sub-cell.
- According to an embodiment of the present invention, the optical film comprises a polymer layer, and the method further comprises
- modifying the polymer layer to provide indents thereon, the indents comprising a first indent in the position of the first sub-cells; a second indent in the position of the second sub-cells and a third indent in the position of the third sub-cells, the first indent arranged to receive the first light re-emitting material, the second indent arranged to receive the second light re-emitting material, and the third indent arranged to receive the third light re-emitting material or a light scatting material.
-
FIG. 1 illustrates a typical display device. -
FIG. 2 illustrates a color pixel in a typical display device. -
FIG. 3 is a graphical representation of a typical quantum dot. -
FIG. 4a illustrates a light re-emitting layer, according to one embodiment of the present invention. -
FIG. 4b illustrates a light re-emitting layer, according to another embodiment of the present invention. -
FIG. 4c illustrates a light re-emitting layer, according to yet another embodiment of the present invention. -
FIG. 4d illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown inFIG. 4a in response to an excitation light. -
FIG. 4e illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown inFIG. 4b in response to an excitation light. -
FIG. 4f illustrates the emerging of the first, second and third light components from a light re-emitting cell in the light re-emitting layer as shown inFIG. 4c in response to an excitation light. -
FIG. 5a illustrates a polarizer component, according to one embodiment of the present invention. -
FIG. 5b illustrates a polarizer component, according to another embodiment of the present invention. -
FIG. 6a illustrates a display device, according to one embodiment of the present invention. -
FIG. 6b illustrates a display device, according to another embodiment of the present invention. -
FIG. 7a illustrates a polarizing layer, according to one embodiment of the present invention. -
FIG. 7b illustrates a polarizing filter attached to a reflective polarizing layer to form the polarizing layer ofFIG. 7a , according to an embodiment of the present invention. -
FIG. 7c illustrates a polarizing layer, according to another embodiment of the present invention. -
FIG. 7d illustrates a polarizing layer, according to yet another embodiment of the present invention. -
FIG. 8a illustrates a display panel, according to one embodiment of the present invention. -
FIG. 8b illustrates a display panel, according to another embodiment of the present invention. -
FIG. 9 illustrates the arrangement of a light source in relationship to the polarizer component, according to an embodiment of the present invention. -
FIG. 10a illustrates a method for producing a polarizer component, according to one embodiment of the present invention. -
FIG. 10b illustrates a method for producing a polarizer component, according to another embodiment of the present invention. -
FIG. 10c illustrates a method for producing a polarizer component, according to yet another embodiment of the present invention. -
FIG. 10d illustrates a method for producing a polarizer component, according to a different embodiment of the present invention. -
FIG. 10e illustrates a method for producing a polarizer component, according to a further embodiment of the present invention. -
FIG. 10f illustrates a method for producing a polarizer component, partly based on the embodiment as shown inFIGS. 10d and 10 e. -
FIG. 10g illustrates a different method for producing a polarizer component also partly based on the embodiment as shown inFIGS. 10d and 10 e. - The present invention is directed to a quantum-dot embedded polarizer component and a color display device having such a polarizer component. According to an embodiment of the present invention, the color display device has a plurality of color pixels defined by a color filter layer and a liquid crystal display panel as shown in
FIGS. 8a and 8b . The color pixels, according to an embodiment of the present invention, can be arranged in rows and columns similar to thepixels 10 in a typical display 1 as shown inFIG. 1 . As shown inFIG. 1 , the display device 1 has adisplay panel 6 on which the plurality ofpixels 10 are arranged, and adata driver 4 and agate driver 8 for providing image data and timing data to thedisplay device 6. When thepixel 10 is a color pixel, it may have three or more color sub-pixels, such as ared pixel 22, agreen pixel 24 and a bluegreen pixel 26, as shown inFIG. 2 . - The quantum dot embedded polarizer component, according to an embodiment of the present invention, is illustrated in
FIG. 5a , and its arrangement in a color display device is shown inFIGS. 6a and 6b . As shown inFIG. 5a , the quantum dot embeddedpolarizer component 110 has at least three layers: apolarizing layer optical film 80 and a lightre-emitting layer polarizing layer optical film 80. The lightre-emitting layer - The light
re-emitting cell FIGS. 4a, 4b, 4c, 4d, 4e and 4f comprises afirst sub-cell 32, asecond sub-cell 34, and a third sub-cell 36, 36′ or 36″. In one embodiment of the present invention as illustrated inFIGS. 4a and 4d , thefirst sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising a blue wavelength range. Thesecond sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light. The third sub-cell 36 can be blank or a layer of transparent material and is arranged to transmit at least part of the excitation light received in the third sub-cell 36 for providing the third light component in the blue wavelength range. Preferably, the red wavelength range includes a peak wavelength in a range from 600 to 680 nm, the green wavelength range includes a peak wavelength in a range from 515 to 550 nm, and the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm. - In a different embodiment as illustrated in
FIGS. 4b and 4e , thefirst sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising a blue wavelength range. Thesecond sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light. The third sub-cell 36′ has a transparent material containing scattering particles configured to transmit and scatter at least part of the excitation light received in the third sub-cell 36′ for providing the third light component in the blue wavelength range. Preferably, the red wavelength range includes a peak wavelength in a range from 600 to 680 nm, the green wavelength range includes a peak wavelength in a range from 515 to 550 nm, and the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm. - In yet another embodiment as illustrated in
FIGS. 4c and 4f , thefirst sub-cell 32 has a layer of first quantum dot material configured to emit a first light component in a red wavelength range in response to an excitation light comprising an ultra violet wavelength range. Thesecond sub-cell 34 has a layer of second quantum dot material configured to emit a second light component in a green wavelength range in response to the same excitation light. The third sub-cell 36″ has a layer of third quantum dot material configured to emit a third light component in a blue wavelength range in response to the same excitation light. Preferably, the red wavelength range includes a peak wavelength in a range from 600 to 680 nm, the green wavelength range includes a peak wavelength in a range from 515 to 550 nm, the blue wavelength range includes a peak wavelength in a range from 440 to 460 nm and the ultra light wavelength range includes a peak wavelength in a range from 290 to 400 nm. - The
layers layer polarizer component 110, as shown inFIGS. 5a and 5b , preferably, are fixedly attached to each other as a single optical component to be used in acolor display device 100 as shown inFIGS. 6a and 6b . The mura phenomena can be erased when there is no air gap betweenlayers polarizer component 110 is laminated between twoprotective layers FIG. 5b in order to protect the quantum dot materials embedded in thepolarizer component 110 from humidity, for example. Theprotective layers polarizer component 110 is attached to thelower substrate 98 of thedisplay panel 90 as shown inFIGS. 8a and 8b , theprotective layer 112 can be omitted. - As shown in
FIG. 6a , the display device has a display panel, such as a liquidcrystal display panel 90 and alight source 140. Thedisplay panel 90 has a lower side and an opposing top side, and the quantum-dot embeddedpolarizer component 110 is disposed between the lower side of thedisplay panel 90 and thelight source 140. Thelight source 140 is arranged to provide the excitation light to the lightre-emitting layer polarizer component 110. Thedisplay device 100 also has atop polarizer 70 disposed on the top side of thedisplay panel 90. Thelight source 140 can be an edge-light type having a blue LED and a light guide panel arranged to redirect the excitation light from the blue LED, for example. Thelight source 140 can also be a direct-light type light source without a light guide panel. Thedisplay device 100 may have a reflectingsurface 150 arranged to reflect part of excitation light through the light source toward thepolarizer component 110. - The quantum-dot embedded
polarizer component 110 can have different layer structures as shown inFIGS. 7a-7d . As shown inFIG. 7d , thepolarizing layer 60″ is a reflectivepolarizing layer 62. The reflectivepolarizing layer 62 is configured to transmit light in a first polarization direction and to reflect light in a different second polarization direction. In this arrangement, the light in the second polarization direction is recycled as the reflected light is directed toward theoptical film 80 through the lightre-emitting layer - In a different embodiment, as shown in
FIG. 7a , thepolarizing layer 60 has two sub-layers: apolarizing filter 61 and a reflectivepolarizing layer 62. The reflectivepolarizing layer 62 is configured to transmit light in a first polarization direction and to reflect light in a different second polarization direction. Thepolarizing filter 61 is configured to transmit light in one polarization direction and absorb light in another polarization direction. For example, thepolarizing filter 61 can be a polarizing sheet composed of a polyvinyl alcohol (PVA)film 66 laminated between two cellulose triacetate (TAC)films FIG. 7b . ThePVA film 66 has been stretched in a certain direction to define its polarization axis so that the PVA film can be used to transmit light having a polarization direction parallel to the polarization axis and to block light having a polarization direction perpendicular to the polarization axis. Thepolarizing filter 61 can be attached to the reflectivepolarizing layer 62 by an adhesive layer. - In another different embodiment, the
polarizing layer 60′ is an enhanced reflective polarizing layer as shown inFIG. 7c . The enhanced reflective polarizing layer is configured to transmit light in a first polarization direction and to partially reflect light in a different second polarization direction and to partially absorb light in the second polarization. The enhanced reflective polarizing layer may have diffused surface (not shown) for brightness enhancement and improving brightness uniformity. -
FIG. 6b is a display device, according to another embodiment of the present invention. The display device shown inFIG. 6b is similar to the embodiment ofFIG. 6a . The difference is that thepolarizing layer 60″ in thepolarizer component 110 is a reflectivepolarizing layer 62 and anotherbottom polarizer 72 is disposed between the lower side of thedisplay panel 90 and thepolarizer component 110. - The
optical film 80 on thepolarizer component 110, as shown inFIG. 5a , can be a transparent optical film, a diffuser or a wavelength-selecting layer. In one embodiment, the wavelength-selecting layer can reflect red and green light to the lightre-emitting layer display panel 90. In another embodiment, the wavelength-selecting layer can reflect red, green and blue light to the lightre-emitting layer 40″ and transmit ultra violet light. In this arrangement, the reflected red, green and blue light are redirected towarddisplay panel 90. In yet another embodiment, the wavelength-selecting layer can reflect red and green light to the lightre-emitting layer 40″ and transmit ultra violet and blue light. In this arrangement, the blue light is recycled and the reflected red light and green light are redirected toward thedisplay panel 90. - The
display panel 90, as shown inFIGS. 8a and 8b , has alower substrate 98 on the lower side and anupper substrate 92 on the top side, and aliquid crystal layer 96 disposed between thelower substrate 98 and theupper substrate 92. It is known in the art that the liquid crystal layer is controlled by electrodes and other electronic components (not shown) provided on the first and second substrates. In one embodiment of the present invention, thedisplay device 90 has acolor filter layer 94 disposed on theupper substrate 92 between theupper substrate 92 and theliquid crystal layer 96, as shown inFIG. 8a . Thecolor filter layer 94 has a plurality ofcolor filter segments 190. Each of thecolor filter segments 190 is associated with a color pixel and a lightre-emitting cell 30 on thepolarizer component 110. Eachcolor filter segment 190 has afirst color filter 192 arranged to filter the first light component emerged from thefirst sub-cell 32; asecond filter 194 arranged to the filter the second light component emerged from thesecond sub-cell 34; and athird filter 196 arranged to filter the third light component emerged from thethird sub-cell 36. Thefirst color filter 192 can be a red color filter R, thesecond color filter 194 can be a green filter G and thethird color filter 196 can be a blue filter B, for example. - In a different embodiment, the
color filter layer 94 is disposed on thelower substrate 98 between thelower substrate 98 and theliquid crystal layer 96, as shown inFIG. 8 b. -
FIG. 9 shows the arrangement oflight source 140 in relationship to thepolarizer component 110. Thepolarizer component 110 can be directly attached or placed adjacent to thelight source 140. In an embodiment of the present invention, one or moreoptical films 138 can be disposed between thelight source 140 and thepolarizer component 110, as shown inFIG. 9 . One or each of theoptical films 138 can be a transparent polymer film, a glass substrate such assubstrate 114 as shown inFIG. 5b . Theoptical films 138 can also be diffusers. The reflectingsurface 150 can be a reflector arranged to reflect the light from thelight source 140 towardpolarizer component 110. - The present invention is also directed to a method for producing the
polarizer component 110. In particular, the method is concerned with producing the lightre-emitting layer FIG. 5a . The method includes providing a surface for depositing the light re-emitting materials. According to one embodiment of the present invention, the surface can be the surface of theoptical film 80 or the polarizing layer 60 (seeFIG. 5a ). As shown inFIG. 10a , a depositing apparatus such as an inkjet printer having two or more nozzles is used to dispense droplets containing the first light re-emitting material (first quantum dot material) and droplets containing the second light re-emitting material (second quantum dot material) onto the surface so as to form the first sub-cells 32 and the second sub-cells 34 in the lightre-emitting cells 30. - The “ink” dispensed from the inkjet printer can be a mixture of solid particles of quantum dots and a clear fluid. The clear fluid can be a thermosetting adhesive, a UV-curable glue or epoxy or a combination thereof, for example. In one embodiment, the depositing apparatus have nozzles to dispense droplet containing only the clear fluid onto the surface to form the third sub-cells 36. In another embodiment, the depositing apparatus have nozzles to dispense droplet containing the clear fluid and a scattering material onto the surface to form the third sub-cells 36′. In yet another embodiment, the depositing apparatus have nozzles to dispense droplet containing the clear fluid and a third light re-emitting material (third quantum dot material) onto the surface to form the third sub-cells 36″.
- In another embodiment of the present invention, an additional
optical film 82 attached to theoptical film 80 is used to provide the surface, as shown inFIG. 10b . As with the embodiment as shown inFIG. 10a , a depositing apparatus such as an inkjet printer having two or more nozzles is used to dispense droplets containing the first light re-emitting material (first quantum dot material) and droplets containing the second light re-emitting material (second quantum dot material) onto the surface so as to form the first sub-cells 32 and the second sub-cells 34 in the lightre-emitting cells 30. - Similar to the embodiment to as shown in
FIG. 10b , anadditional film 82 attached to thepolarizing layer 60 is used to provide the surface, as shown inFIG. 10 c. - In a different embodiment, the surface of the
optical film 80 or thepolarizing layer 60 is modified to produce a plurality of indents or pockets so that quantum dot materials can be deposited in the indents or pockets to form the sub-cells in a lightre-emitting cell 30. As shown inFIG. 10d , the surface-modifiedfilm FIG. 6 ) when forming on theoptical film 80. A surface-modified film can be made in different ways. For example, the indents or pockets can be made by engraving, embossing or stamping. The surface-modified film can be made of PMMA, PC, PET or the like. - In a different embodiment of the present invention, the surface of the
additional film 84 attached to theoptical film 80 or thepolarizing layer 60 is modified to produce a plurality of indents or pockets so that quantum dot materials can be deposited in the indents or pockets to form the sub-cells in a lightre-emitting cell 30, as shown inFIG. 10 e. - In yet another embodiment of the present invention, a third light re-emitting material (third quantum dot material) is also deposited in the third sub-cell 36″ in the light
re-emitting cells 30, on the cup-like indents either on the surface modifiedfilm 80, the surface modifiedfilm 60 or on the surface of theadditional film 84, as shown inFIG. 10 f. - In a further embodiment of the present invention, a scattering material is also deposited in the third sub-cell 36′, on the cup-like indents either on the surface modified
film 80, the surface modifiedfilm 60 or on the surface of theadditional film 84, as shown inFIG. 10 g. -
FIG. 3 is a graphical representation of a quantum dot. As known in the art, a quantum dot is a crystal of semiconductor material whose diameter is on the order of several nanometers—a size which results in its free charge carriers experiencing quantum confinement in its spatial dimensions. A quantum dot has a core and a shell. The core can be made of CdSe, ZnSe, CdS, MnSe, InP, PbSe and CdTe, for example. The shell can be made of ZnS, ZnSe, CdS and PbS, for example. The function of the core is to provide the band gap and, thus, to control the color of the re-emitted light. The color is also controlled by the composition of the core. The shell passivates the defects on the core surface. Typically quantum dots are also provided with caps or ligand having the composition of CH2CH2CH2CH2SH, mainly used for dispersion in a solution. - In the quantum dot embedded polarizer component, according to the present invention, the first, second and third wavelength ranges emerged from the first, second and third quantum dot materials can be selected by controlling the size distribution and the composition of the quantum dots. The first wavelength range can be selected to match the characteristics of a red color filter, the second wavelength range can be selected to match the characteristics of a green color filter and the third wavelength range can be selected to match the characteristics of a blue color filter.
- Although the present invention has been described with respect to one or more embodiments thereof, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (20)
1. A polarizer component comprising:
a polarizing layer;
an optical film configured to receive an excitation light; and
a light re-emitting layer disposed between the polarizing layer and the optical film, wherein the light re-emitting layer comprises a plurality of light re-emitting cells, each cell comprising at least a first sub-cell, a second sub-cell and a third sub-cell, the first sub-cell comprising a first light re-emitting material configured to emit a first light component in a first wave-length range in response to the excitation light, the second sub-cell comprising a second light re-emitting material configured to emit a second light component in a second wave-length range in response to the excitation light, the third sub-cell configured to provide a third light component in response to the excitation light, the first re-emitting material comprising a first quantum dot material arranged to emit the first light component, the second re-emitting material comprising a second quantum dot material arranged to emit the second light component, wherein the excitation light comprises a third wavelength range, wherein the optical film and the light re-emitting layer are arranged such that the excitation light is provided to the light re-emitting layer through the optical film, and wherein the optical film comprises a wavelength selecting layer configured to reflect light in the first wavelength range and light in the second wavelength range and to transmit light in the third wavelength range.
2. The polarizer component according to claim 1 , wherein the third sub-cell is configured to transmit at least part of the excitation light for providing the third light component in the third wavelength range.
3. The polarizer component according to claim 1 , wherein the third sub-cell comprises a light-scattering material configured to transmit and scatter at least part of the excitation light for providing the third light component in the third wavelength range.
4. The polarizer component according to claim 1 , wherein the third sub-cell comprises a third light re-emitting material, the third light re-emitting material comprising a third quantum dot material configured to emit the third light component in a fourth wavelength range in response to the excitation light, and wherein the wavelength selecting layer is further configured to reflect or transmit light in the fourth wavelength range.
5. The polarizer component according to claim 1 , wherein the polarizing layer is configured to transmit light in a first polarization and to reflect light in a different second polarization.
6. The polarizer component according to claim 1 , wherein the polarizing layer is configured to transmit light in a first polarization and to partially reflect light in a different second polarization and to partially absorb light in the second polarization.
7. The polarizer component according to claim 1 , wherein the polarizing layer comprises a first polarizing sub-layer configured to transmit light in a first polarization and to reflect light in a second different polarization, and a second polarizing sub-layer configured to transmit light in the first polarization and to absorb light in the second polarization.
8. The polarizer component according to claim 7 , wherein the first polarizing sub-layer is provided between the second polarizing sub-layer and the light re-emitting layer.
9. A display device comprising:
a display panel having a first side and an opposing second side;
a light source;
a polarizing component according to claim 1 disposed between the first side of the display panel and the light source; and
a second polarizing component located on the second side of the display panel, wherein the light source is arranged to provide the excitation light.
10. The display device according to claim 9 , further comprising a third polarizing component disposed between the first side of the display panel and the polarizing component, wherein the third polarizing component is configured to transmit light in a first polarization and to absorb light in a different second polarization.
11. The display device according to claim 9 , further comprising a reflective surface positioned in relationship to the light source, arranged to reflect at least part of the excitation light through the light source toward the polarizer component.
12. The display device according to claim 9 , wherein the display panel comprises a first substrate on the first side, a second substrate on the second side and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the polarizing layer of the polarizer component is disposed adjacent to the first substrate of the display panel, the display panel comprising a plurality of pixels, each pixel comprising at least a first color sub-pixel, a second color sub-pixel and a third color sub-pixel that are corresponding to the first, second and third sub-cells in a one-to-one fashion.
13. The display device according to claim 9 , wherein the display panel further comprises a color filter layer disposed on the first substrate of the display panel, between the liquid crystal layer and the first substrate.
14. The display device according to claim 9 , wherein the display panel further comprises a color filter layer disposed on the second substrate of the display panel, between the liquid crystal layer and the second substrate.
15. A method for producing a polarizer component according to claim 1 , comprising:
providing a surface for the light re-emitting layer; and
depositing the first light re-emitting material in position of the first sub-cell and depositing the second light re-emitting material in position of the second sub-cell.
16. The method according to claim 15 , wherein the optical film or the polarizing layer has a layer surface for providing the surface.
17. The method according to claim 15 , further comprising
depositing a scattering material in position of the third sub-cell.
18. The method according to claim 15 , further comprising
depositing a third light re-emitting material comprising a third quantum dot material in the position of the third sub-cell, the third quantum dot material configured to emit the third light component in a fourth wavelength range in response to the excitation light.
19. The method according to claim 15 , wherein said depositing comprises causing one or more nozzles to dispense droplets containing the first light re-emitting material in the position of the first sub-cell and to dispense droplets containing the second light re-emitting material in the position of the second sub-cell.
20. The method according to claim 19 , wherein the optical film or the polarizing layer comprises a polymer layer, said method further comprising
modifying the polymer layer to provide indents thereon, the indents comprising a first indent in the position of the first sub-cells and a second indent in the position of the second sub-cells, the first indent arranged to receive the first light re-emitting material, and the second indent arranged to receive the second light re-emitting material.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/947,430 US20170146859A1 (en) | 2015-11-20 | 2015-11-20 | Quantum-dot embedded polarizer component and display device using same |
US16/504,878 US10955703B2 (en) | 2015-11-20 | 2019-07-08 | Quantum-dot embedded polarizer component and display device using same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/947,430 US20170146859A1 (en) | 2015-11-20 | 2015-11-20 | Quantum-dot embedded polarizer component and display device using same |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/504,878 Continuation US10955703B2 (en) | 2015-11-20 | 2019-07-08 | Quantum-dot embedded polarizer component and display device using same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170146859A1 true US20170146859A1 (en) | 2017-05-25 |
Family
ID=58720943
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/947,430 Abandoned US20170146859A1 (en) | 2015-11-20 | 2015-11-20 | Quantum-dot embedded polarizer component and display device using same |
US16/504,878 Active US10955703B2 (en) | 2015-11-20 | 2019-07-08 | Quantum-dot embedded polarizer component and display device using same |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/504,878 Active US10955703B2 (en) | 2015-11-20 | 2019-07-08 | Quantum-dot embedded polarizer component and display device using same |
Country Status (1)
Country | Link |
---|---|
US (2) | US20170146859A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9736900B1 (en) * | 2016-06-15 | 2017-08-15 | Rockwell Collins, Inc. | Quantum dot tunable assemblies and methods |
US20170343719A1 (en) * | 2016-05-27 | 2017-11-30 | Hon Hai Precision Industry Co., Ltd. | Display apparatus and method for altering the display apparatus |
CN108319064A (en) * | 2018-02-06 | 2018-07-24 | 京东方科技集团股份有限公司 | Array substrate, display panel and display device |
US10139679B2 (en) * | 2016-02-18 | 2018-11-27 | Boe Technology Group Co., Ltd. | Liquid crystal display panel and method of manufacturing the same, and display device |
CN108897170A (en) * | 2018-07-26 | 2018-11-27 | 福建船政交通职业学院 | A kind of color converts the liquid crystal module of film and its composition |
WO2019015290A1 (en) * | 2017-07-20 | 2019-01-24 | 武汉华星光电技术有限公司 | Liquid crystal display |
US10210799B2 (en) | 2017-06-28 | 2019-02-19 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel compensation circuit and display device |
US20190129250A1 (en) * | 2017-10-31 | 2019-05-02 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device including the same |
KR20190048831A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
KR20190048830A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
WO2019148661A1 (en) * | 2018-01-30 | 2019-08-08 | 深圳市华星光电技术有限公司 | Liquid display panel and manufacturing method therefor, and liquid crystal display device |
CN110873915A (en) * | 2018-08-31 | 2020-03-10 | 昆山工研院新型平板显示技术中心有限公司 | Polaroid and display panel |
US10656471B2 (en) | 2018-01-30 | 2020-05-19 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel and its method of manufacture, liquid crystal display device |
WO2020177187A1 (en) * | 2019-03-07 | 2020-09-10 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display module |
US10935845B2 (en) * | 2019-04-11 | 2021-03-02 | Beijing Boe Optoelectronics Technology Co., Ltd. | Backlight module and display device |
CN114326206A (en) * | 2021-11-15 | 2022-04-12 | 友达光电股份有限公司 | Display device |
US20220223765A1 (en) * | 2016-12-14 | 2022-07-14 | Samsung Electronics Co., Ltd. | Emissive nanocrystal particle, method of preparing the same and device including emissive nanocrystal particle |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111029482B (en) * | 2019-12-17 | 2021-01-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140118988A1 (en) * | 2011-06-02 | 2014-05-01 | Nec Corporation | Fluorescent Screen and Image Display Device Provided with Same |
US20150062490A1 (en) * | 2012-01-13 | 2015-03-05 | Research Cooperation Foundation Of Yeungnam University | Backlight unit and liquid crystal display device including same |
US20150228232A1 (en) * | 2014-02-11 | 2015-08-13 | Samsung Display Co., Ltd. | Display apparatus and method for driving the same |
US20160116801A1 (en) * | 2014-10-23 | 2016-04-28 | Innolux Corporation | Display device |
US20160377263A1 (en) * | 2015-06-23 | 2016-12-29 | Samsung Electronics Co., Ltd. | Display assembly and display device using the same |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW567291B (en) | 2002-07-19 | 2003-12-21 | Au Optronics Corp | Direct type backlight module |
US6976781B2 (en) | 2002-10-25 | 2005-12-20 | Au Optronics Corp. | Frame and bezel structure for backlight unit |
TWI296348B (en) | 2003-07-11 | 2008-05-01 | Au Optronics Corp | Liquid crystal display device |
TWI550581B (en) | 2010-12-17 | 2016-09-21 | 杜比實驗室特許公司 | Method and apparatus for image display, computer readable storage medium and computing device |
KR101177480B1 (en) | 2011-02-14 | 2012-08-24 | 엘지전자 주식회사 | Lighting apparatus and display device comprising the same |
KR102118309B1 (en) | 2012-09-19 | 2020-06-03 | 돌비 레버러토리즈 라이쎈싱 코오포레이션 | Quantum dot/remote phosphor display system improvements |
CN102854558A (en) | 2012-09-27 | 2013-01-02 | 京东方科技集团股份有限公司 | Polaroid and display device |
US9361856B2 (en) | 2013-01-18 | 2016-06-07 | Google Inc. | Liquid crystal display with photo-luminescent material layer |
US9719639B2 (en) * | 2013-12-20 | 2017-08-01 | Apple Inc. | Display having backlight with narrowband collimated light sources |
-
2015
- 2015-11-20 US US14/947,430 patent/US20170146859A1/en not_active Abandoned
-
2019
- 2019-07-08 US US16/504,878 patent/US10955703B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140118988A1 (en) * | 2011-06-02 | 2014-05-01 | Nec Corporation | Fluorescent Screen and Image Display Device Provided with Same |
US20150062490A1 (en) * | 2012-01-13 | 2015-03-05 | Research Cooperation Foundation Of Yeungnam University | Backlight unit and liquid crystal display device including same |
US20150228232A1 (en) * | 2014-02-11 | 2015-08-13 | Samsung Display Co., Ltd. | Display apparatus and method for driving the same |
US20160116801A1 (en) * | 2014-10-23 | 2016-04-28 | Innolux Corporation | Display device |
US20160377263A1 (en) * | 2015-06-23 | 2016-12-29 | Samsung Electronics Co., Ltd. | Display assembly and display device using the same |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10139679B2 (en) * | 2016-02-18 | 2018-11-27 | Boe Technology Group Co., Ltd. | Liquid crystal display panel and method of manufacturing the same, and display device |
US10261235B2 (en) * | 2016-05-27 | 2019-04-16 | Hon Hai Precision Industry Co., Ltd. | Display apparatus and method for altering the display apparatus |
US20170343719A1 (en) * | 2016-05-27 | 2017-11-30 | Hon Hai Precision Industry Co., Ltd. | Display apparatus and method for altering the display apparatus |
US9736900B1 (en) * | 2016-06-15 | 2017-08-15 | Rockwell Collins, Inc. | Quantum dot tunable assemblies and methods |
US20220223765A1 (en) * | 2016-12-14 | 2022-07-14 | Samsung Electronics Co., Ltd. | Emissive nanocrystal particle, method of preparing the same and device including emissive nanocrystal particle |
US10210799B2 (en) | 2017-06-28 | 2019-02-19 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel compensation circuit and display device |
WO2019015290A1 (en) * | 2017-07-20 | 2019-01-24 | 武汉华星光电技术有限公司 | Liquid crystal display |
KR20190048830A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
US10775670B2 (en) | 2017-10-31 | 2020-09-15 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device including the same |
CN109725455A (en) * | 2017-10-31 | 2019-05-07 | 乐金显示有限公司 | Back light unit and liquid crystal display device including the back light unit |
KR20190048829A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
KR20190048831A (en) * | 2017-10-31 | 2019-05-09 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
KR102522945B1 (en) | 2017-10-31 | 2023-04-17 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
KR102513512B1 (en) | 2017-10-31 | 2023-03-22 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
KR102451309B1 (en) | 2017-10-31 | 2022-10-05 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
US20190129250A1 (en) * | 2017-10-31 | 2019-05-02 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device including the same |
US10768480B2 (en) * | 2017-10-31 | 2020-09-08 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device including the same |
WO2019148661A1 (en) * | 2018-01-30 | 2019-08-08 | 深圳市华星光电技术有限公司 | Liquid display panel and manufacturing method therefor, and liquid crystal display device |
US10656471B2 (en) | 2018-01-30 | 2020-05-19 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel and its method of manufacture, liquid crystal display device |
US10642112B2 (en) * | 2018-02-06 | 2020-05-05 | Boe Technology Group Co., Ltd. | Array substrate, display panel and display device |
CN108319064A (en) * | 2018-02-06 | 2018-07-24 | 京东方科技集团股份有限公司 | Array substrate, display panel and display device |
US20190243176A1 (en) * | 2018-02-06 | 2019-08-08 | Boe Technology Group Co., Ltd. | Aray substrate, display panel and display device |
CN108897170A (en) * | 2018-07-26 | 2018-11-27 | 福建船政交通职业学院 | A kind of color converts the liquid crystal module of film and its composition |
CN110873915A (en) * | 2018-08-31 | 2020-03-10 | 昆山工研院新型平板显示技术中心有限公司 | Polaroid and display panel |
WO2020177187A1 (en) * | 2019-03-07 | 2020-09-10 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display module |
US10935845B2 (en) * | 2019-04-11 | 2021-03-02 | Beijing Boe Optoelectronics Technology Co., Ltd. | Backlight module and display device |
CN114326206A (en) * | 2021-11-15 | 2022-04-12 | 友达光电股份有限公司 | Display device |
Also Published As
Publication number | Publication date |
---|---|
US20190331966A1 (en) | 2019-10-31 |
US10955703B2 (en) | 2021-03-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10955703B2 (en) | Quantum-dot embedded polarizer component and display device using same | |
US10620478B2 (en) | Photoluminescent display device and method for manufacturing the same | |
US9529136B2 (en) | Backlight unit and display apparatus having the same | |
KR101251815B1 (en) | Optical sheet and display device having the same | |
US10191200B2 (en) | Quantum rod sheet, backlight unit, display device and manufacturing method thereof | |
KR101794653B1 (en) | Liquid Crystal Display and its panel having a light conversion layer | |
US8514352B2 (en) | Phosphor-based display | |
JP6890470B2 (en) | Photoluminescence display device and its manufacturing method | |
US10031272B2 (en) | Display device with backlight using dichroic filter to prevent light leakage | |
US20150378216A1 (en) | Backlight unit and display device having the same | |
US10539828B2 (en) | Polarizing light emitting plate and display device having the same | |
KR102224083B1 (en) | Display device and fabrication method of the same | |
KR20120122654A (en) | Backlight unit and liquid crystal display device | |
JP2019121547A (en) | Luminaire and display unit | |
KR102298922B1 (en) | Liquid crystal display device | |
US10330851B2 (en) | Backlight systems containing downconversion film elements | |
KR101792102B1 (en) | Liquid crystal display device | |
US10539721B2 (en) | Diffusion sheet, backlight unit, and liquid crystal display device | |
KR20150102139A (en) | A backlight unit and a liquid crystal display device having the same | |
KR102112755B1 (en) | Display device and fabrication method of the same | |
US20200166808A1 (en) | Optical member and display device including the same | |
KR101736922B1 (en) | Backlight unit and manufacturing method for diffusion sheet thereof | |
KR102436409B1 (en) | Light control sheet, method of fabricating thereof and liquid crystal display device having the same | |
US20190163018A1 (en) | Optical member and display device including the same | |
KR20050103563A (en) | Liquid crystal display |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: A.U. VISTA, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIN, YI-WEN;ABILEAH, ADIEL;DEN BOER, WILLEM;AND OTHERS;SIGNING DATES FROM 20151123 TO 20151125;REEL/FRAME:037454/0008 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: FINAL REJECTION MAILED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: ADVISORY ACTION MAILED |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |