WO2017000502A1 - Display device and method of manufacturing thereof - Google Patents

Display device and method of manufacturing thereof Download PDF

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Publication number
WO2017000502A1
WO2017000502A1 PCT/CN2015/096934 CN2015096934W WO2017000502A1 WO 2017000502 A1 WO2017000502 A1 WO 2017000502A1 CN 2015096934 W CN2015096934 W CN 2015096934W WO 2017000502 A1 WO2017000502 A1 WO 2017000502A1
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WO
WIPO (PCT)
Prior art keywords
wave plate
metal pattern
light absorbing
absorbing layer
substrate
Prior art date
Application number
PCT/CN2015/096934
Other languages
French (fr)
Inventor
Yunyun Tian
Hyun Sic Choi
Original Assignee
Boe Technology Group Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Boe Technology Group Co., Ltd. filed Critical Boe Technology Group Co., Ltd.
Priority to EP15868663.4A priority Critical patent/EP3320388A4/en
Priority to US15/107,662 priority patent/US10096801B2/en
Publication of WO2017000502A1 publication Critical patent/WO2017000502A1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal 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
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
    • H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
    • H01L27/1218—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76—Unipolar devices, e.g. field effect transistors
    • H01L29/772—Field effect transistors
    • H01L29/78—Field effect transistors with field effect produced by an insulated gate
    • H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
    • H01L29/78606—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device
    • H01L29/78633—Thin film transistors, i.e. transistors with a channel being at least partly a thin film with supplementary region or layer in the thin film or in the insulated bulk substrate supporting it for controlling or increasing the safety of the device with a light shield
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/856—Arrangements for extracting light from the devices comprising reflective means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/126—Shielding, e.g. light-blocking means over the TFTs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/878—Arrangements for extracting light from the devices comprising reflective means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
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    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G02F1/136295—Materials; Compositions; Manufacture processes
    • G—PHYSICS
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    • 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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/02—Number of plates being 2
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Definitions

  • the present invention relates to display technology, more particularly, to a display device and a method of manufacturing thereof.
  • LCD and OLED display devices include metal structures such as gate lines and data lines. These metal structures reflect incident light, reducing display quality.
  • the present invention provides a display device, comprising a metal pattern on a first substrate of a display device; a first light absorbing layer positioned to absorb light reflected by the metal pattern.
  • the first light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  • the display device further comprises a first quarter wave plate and a first half wave plate.
  • the first quarter wave plate and the first half wave plate are so positioned that light reflected by the metal pattern passes through the first quarter wave plate and the first half wave plate in a sequential order before it is absorbed by the first light absorbing layer, wherein the first substrate is a substrate proximal to a first light emitting surface of the display device for image display.
  • the metal pattern, the first quarter wave plate, the first half wave plate, and the first light absorbing layer are sequentially arranged on the first substrate along a direction away from the first substrate.
  • the first light absorbing layer, the first half wave plate, the first quarter wave plate, and the metal pattern are sequentially arranged on the first substrate along a direction away from the first substrate.
  • the first light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60% to 98%, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2%to 40%, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
  • the display device further comprises a second substrate facing the first substrate; a second light absorbing layer positioned to absorb light reflected by the metal pattern; a second quarter wave plate; and a second half wave plate.
  • the second light absorbing layer has a pattern corresponding to at least a portion of the metal pattern; wherein the second quarter wave plate and the second half wave plate are so positioned that light reflected by the second metal pattern passes through the second quarter wave plate and the second half wave plate in a sequential order before it is absorbed by the second light absorbing layer, wherein the second substrate is a substrate proximal to a second light emitting surface of the display device for image display.
  • the first light absorbing layer, the first half wave plate, the first quarter wave plate, the metal pattern, the second quarter wave plate, the second half wave plate, the second light absorbing layer, and the second substrate are sequentially arranged on the first substrate along a direction away from the first substrate.
  • the first light absorbing layer is a polarizer.
  • the display device is an organic electroluminescence display device comprising an organic light emitting diode, the organic light emitting diode is connected to a switching transistor and comprises a transparent electrode.
  • the metal pattern comprising one or more of the following: a gate line metal pattern, a data line metal pattern, a source/drain electrode metal pattern, and a touch electrode metal pattern.
  • the present invention provides a method of manufacturing a display device, comprising forming a metal pattern on a first substrate; and forming a light absorbing layer on the first substrate.
  • the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  • the step of forming the light absorbing layer on the first substrate is performed prior to the step of forming a metal pattern on the first substrate so that the metal pattern is formed on top of the light absorbing layer.
  • the method further comprises sequentially forming a half wave plate layer and a quarter wave plate layer on top of the light absorbing layer.
  • the half wave plate layer and the quarter wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  • the step of forming the light absorbing layer on the first substrate is performed subsequent to the step of forming a metal pattern on the first substrate so that the light absorbing layer is formed on top of the metal pattern.
  • the method further comprises sequentially forming a quarter wave plate layer and a half wave plate layer on top of the metal pattern.
  • the quarter wave plate layer and the half wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  • the light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60%to 98%, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2%to 40%, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
  • the light absorbing layer is a polarizer.
  • the method further comprising forming an organic light emitting diode on the first substrate comprising the metal pattern.
  • the organic light emitting diode is connected to a switching transistor, and comprises a transparent electrode.
  • the present invention provides a method of manufacturing a display device, comprising forming a first light absorbing layer on top of a first substrate; sequentially forming a first half wave plate layer and a first quarter wave plate layer on top of the first light absorbing layer; forming a metal pattern on the first quarter wave plate layer; sequentially forming a second quarter wave plate layer and a second half wave plate layer on the metal pattern; and forming a second light absorbing layer on the second half wave plate layer.
  • FIG. 1 is a diagram illustrating the structure of a display device in an embodiment.
  • FIG. 2 is a diagram illustrating the structure of a display device in another embodiment.
  • FIG. 3 is a diagram illustrating the structure of a display device in another embodiment.
  • FIG. 4 is a diagram illustrating the structure of a display device in another embodiment.
  • FIG. 5 is a diagram illustrating the structure of a display device in another embodiment.
  • FIG. 6 is a diagram illustrating the structure of a display device in another embodiment.
  • FIG. 7 is a diagram illustrating a method of manufacturing a display device in an embodiment.
  • FIG. 8 is a diagram illustrating the formation of a light absorbing layer in an embodiment.
  • FIG. 9 is a diagram illustrating a method of manufacturing a display device in another embodiment.
  • FIG. 10 is a diagram illustrating a method of manufacturing a display device in another embodiment.
  • FIG. 11 is a diagram illustrating a method of manufacturing a display device in another embodiment.
  • FIG. 1 is a diagram illustrating the structure of a display device 1 in an embodiment.
  • the display device 1 in the embodiment includes a metal pattern 12 on a first substrate 10 of the display device 1 and a light absorbing layer 16 positioned to absorb light reflected from the metal pattern 12.
  • the light absorbing layer 16 has a pattern corresponding to at least a portion of the metal pattern 12 so that light reflected by at least a portion of the metal pattern 12 is absorbed by the light absorbing layer 16.
  • the light absorbing layer 16 can have a same pattern as the metal pattern 12 so that two patterns overlap with each other in plan of the first substrate.
  • the light absorbing layer 16 pattern is larger in area as compared to the metal pattern 12, to ensure that as much as possible light reflected by the metal pattern 12 will be absorbed.
  • the light absorbing layer 16 pattern is slightly smaller in area than the metal pattern 12.
  • the light absorbing layer 16 is a transparent layer or a semi-transparent layer.
  • the display device 1 in the embodiment also includes a half wave plate 15 and a quarter wave plate 14.
  • the metal pattern 12, the quarter wave plate 14, the half wave plate 15, and the light absorbing layer 16 are sequentially arranged on the first substrate 1 along a direction away from the first substrate 1.
  • the quarter wave plate 14, the half wave plate 15, and the light absorbing layer 16 are so positioned that light reflected by the metal pattern 12 first passes through the quarter wave plate 15 and the half wave plate 14 in a sequential order before it is absorbed by the light absorbing layer 16.
  • the light absorbing layer 16 may be made of any suitable light filtering material so long as it absorbs light reflected from the metal pattern 12.
  • the light absorbing layer 16 can be a layer comprising a light absorbing material such as graphite or other black materials.
  • the light absorbing layer 16 is a polarizer.
  • the polarizer is a liquid crystal polarizer.
  • suitable liquid crystal materials may be used for making the light absorbing layer 16.
  • the liquid crystal polarizer 16 can include a mixture of liquid crystal polymer molecules and dichroic dye molecules. The mixture can be cured by, e.g., heat or UV light. Examples of dichroic dyes may be found in U.S. Patent No.
  • the mixture may contain additives, such as adhesion and/or toughness enhancers, rheology modifiers, plasticizers, surfactants, leveling agents, etc., depending, for example, on the desired optical properties of the display.
  • liquid crystal polymer to dichroic dye ratios may be used.
  • the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1, e.g., 3: 2 to 13: 7, 13: 7 to 2: 3, 2: 3 to 3: 1, 3: 1 to 4: 1, 4: 1 to 17: 3, 17: 3 to 9: 1, 9: 1 to 19: 1, 19: 1 to 49: 2.
  • the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60%to 98%, e.g., 60%-65%, 65%-70%, 70%-75%, 75%-80%, 80%-85%, 85%-90%, 90%-95%, 95%-98%.
  • the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2%to 40%, e.g., 2%-5%, 5%-10%, 10%-15%, 15%-20%, 20%-25%, 25%-30%, 30%-35%, 35%-40%.
  • the light absorbing layer 16 is a linear polarizer 16, and the display device includes a half wave plate 15 sandwiched between the linear polarizer 16 and a quarter wave plate 14. An incident light passes through the linear polarizer 16 and is linearly polarized.
  • the half wave plate 15 has its optics axis set at an angle ⁇ with respect to the transmission axis of the linear polarizer 16. When the linearly polarized light from the linear polarizer 16 passes through the half wave plate 15, the plane of polarization of the light will be rotated by 2 ⁇ .
  • the quarter wave plate 14 has its optics axis set at an angle of 2 ⁇ plus 45 degrees, with respect to the transmission axis of the linear polarizer 16.
  • the linearly polarized light from the half wave plate 15 enters into the quarter wave plate 14, it is converted into circularly polarized light, e.g., left circularly polarized light.
  • the left circularly polarized light is then reflected from the metal pattern 12, and is converted into right circularly polarized light.
  • the reflected, right circularly polarized light enters into the quarter wave plate 14.
  • the right circularly polarized light is circularly polarized a second time by the quarter wave plate 14, and is now converted into linearly polarized light having a polarization direction perpendicular to the transmission axis of the linear polarizer 16. Accordingly, no reflected light passes through the linear polarizer 16.
  • the half wave plate 15 has its optics axis set at 15 degrees with respect to the transmission axis of the polarizer 16, and the quarter wave plate 14 has its optics axis set at 75 degrees with respect to the transmission axis of the polarizer 16.
  • the polarizer 16 When light passes through the polarizer 16, it becomes vertically polarized.
  • the vertically polarized light is converted into left circularly polarized light after it passes through the half wave plate 15 and the quarter wave plate 14.
  • the left circularly polarized light becomes right circularly polarized light after it is reflected by the metal pattern 12.
  • the right circularly polarized light passes through the quarter wave plate 14 and the half wave plate 15, and is now converted into horizontally polarized light, the direction of which is vertical to the transmission axis of the polarizer 16.
  • the horizontally polarized light cannot pass through the polarizer 16.
  • the display device may be a liquid crystal display (LCD) device or an organic light-emitting display (OLED) device.
  • An OLED device may include an organic light emitting diode.
  • the electrodes of the organic light emitting diode is made of a transparent electrode material such as indium tin oxide (ITO) .
  • the display device may be a single-side emission device (see, e.g., FIGs. 1, 2, 4, and 5) or a dual-side emission device (see, e.g., FIGs. 3 and 6) .
  • the display device includes a first substrate 10 and a second substrate 11 facing each other.
  • the light absorbing layer 16 is disposed on a side of the first substrate 10 facing the second substrate 11 or on a side of the second substrate 11 facing the first substrate 10.
  • the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other. Display device emits light from the second substrate 11 for image display.
  • the display device in the embodiment also includes a metal pattern 12 on top of the first substrate 10, and a transparent electrode 13 connected to a drain electrode of a switching thin film transistor.
  • the transparent electrode 13 can be, for example, a pixel electrode in a liquid crystal display device or an anode in an organic electroluminescence display device.
  • the display device in the embodiment further includes a quarter wave plate 14 on top of the metal pattern 12 and the transparent electrode 13, a half wave plate 15 on top of the quarter wave plate 14, and a light absorbing layer 16 (e.g., a polarizer) on top of the half wave plate 15.
  • the light absorbing layer 16 is disposed on the light emitting side of the display device, and has a pattern corresponding to at least a portion of the metal pattern 12.
  • the switching thin film transistor may include a gate electrode, a source electrode, a drain electrode, and an active layer.
  • the metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and/or a source/drain electrode metal pattern 122 in a switching thin film transistor.
  • the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • FIG. 2 is a diagram illustrating the structure of a display device in another embodiment.
  • the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other. Display device emits light from the first substrate 10 for image display.
  • the display device in the embodiment also includes a light absorbing layer 16 on top of the first substrate 10 (e.g., on the inner surface of the first substrate 10) , a half wave plate 15 on top of the light absorbing layer 16, a quarter wave plate 14 on top of the half wave plate 15.
  • the display device also includes, on top of the quarter wave plate 14, a metal pattern 12 and a transparent electrode 13 connected to a drain electrode of a switching thin film transistor.
  • the transparent electrode 13 can be, for example, a pixel electrode in a liquid crystal display device or an anode in an organic electroluminescence display device.
  • the metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and/or a source/drain electrode metal pattern 12 in a switching thin film transistor.
  • the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • the light absorbing layer 16 is disposed on the light emitting side of the display device, and has a pattern corresponding to at least a portion of the metal pattern 12.
  • FIG. 3 is a diagram illustrating the structure of a display device in another embodiment.
  • the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other.
  • the display device in the embodiment is a dual-side emission device for image display.
  • the display device in the embodiment also includes a first light absorbing layer 16 on top of the first substrate 10 (e.g., on the inner surface of the first substrate 10) , a first half wave plate 15 on top of the first light absorbing layer 16, a first quarter wave plate 14 on top of the first half wave plate 15, a metal pattern 12 and a transparent electrode 13 connected to a drain electrode of the switching thin film transistor on top of the first quarter wave plate 14, a second quarter wave plate 14 on top of the metal pattern 12 and the transparent electrode 13, a second half wave plate 15 on top of the second quarter wave plate 14, a second light absorbing layer 16 on top of the second half wave plate 15, and a second substrate 11 on top of the second light absorbing layer 16.
  • the first and second light absorbing layers 16 are disposed on the two light emitting sides of the display device, and have a pattern corresponding to at least a portion of the metal pattern 12.
  • the metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and a source/drain electrode metal pattern 122 in a switching thin film transistor.
  • the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • FIGs. 4-6 are diagrams illustrating the structures of display devices in some embodiments.
  • the embodiments shown in FIGs. 4-6 correspond to the embodiments as shown in FIGs. 1-3, respectively, with the difference that the half wave plates 15 and the quarter wave plates 14 in FIGs. 4-6 are not limited to the areas corresponding to the light absorbing layers 16.
  • the half wave plates 15 and the quarter wave plates 14 are disposed over the same areas covered by the light absorbing layers 16.
  • the half wave plates 15 and the quarter wave plates 14 additionally cover areas outside of those by the light absorbing layers 16.
  • the half wave plates 15 and the quarter wave plates 14 cover the entire display panel.
  • the widths of two light absorbing layers 16 are the same.
  • the widths of two half wave plates 15 are the same, and/or the width of two quarter wave plates 14 are the same.
  • the widths of the half wave plates 15 and the quarter wave plates 14 substantially equal to the width of the display panel.
  • the transistor can be a top gate transistor (i.e., the gate electrode is disposed on top of the source and drain) or a bottom gate transistor (i.e., the gate electrode is disposed underneath the source and drain) .
  • FIG. 7 is a diagram illustrating a method of manufacturing a display device in an embodiment.
  • the method in the embodiment includes forming a metal pattern on a substrate and forming a light absorbing layer on the substrate.
  • the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  • the light absorbing layer can be patterned using a patterning process.
  • the light absorbing layer (e.g., a liquid crystal polarizer) includes a mixture of liquid crystal polymer molecules and dichroic dye molecules.
  • the mixture can be cured by, e.g., heat or ultraviolet light.
  • various liquid crystal polymer to dichroic dye ratios may be used.
  • the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1, e.g., 3: 2 to 13: 7, 13: 7 to 2: 3, 2: 3 to 3: 1, 3:1 to 4: 1, 4: 1 to 17: 3, 17: 3 to 9: 1, 9: 1 to 19: 1, 19: 1 to 49: 2.
  • the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60%to 98%, e.g., 60%-65%, 65%-70%, 70%-75%, 75%-80%, 80%-85%, 85%-90%, 90%-95%, 95%-98%.
  • the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2%to 40%, e.g., 2%-5%, 5%-10%, 10%-15%, 15%-20%, 20%-25%, 25%-30%, 30%-35%, 35%-40%.
  • the mixture may contain additives, such as adhesion and/or toughness enhancers, rheology modifiers, plasticizers, surfactants, leveling agents, etc., depending, for example, on the desired optical properties of the display.
  • additives such as adhesion and/or toughness enhancers, rheology modifiers, plasticizers, surfactants, leveling agents, etc., depending, for example, on the desired optical properties of the display.
  • FIG. 8 is a diagram illustrating the formation of a light absorbing layer in an embodiment.
  • the light absorbing layer includes a mixture of liquid crystal polymer molecules (white rods in FIG. 8) and dichroic dye molecules (black rods in FIG. 8) .
  • the structures of the mixture before and after the curing are shown in FIG. 8A and FIG. 8B, respectively.
  • the method of forming the light absorbing layer in the embodiment includes mixing liquid crystal polymer molecules and dichroic dye molecules, forming a liquid crystal polymer-dichroic dye mixture, curing the mixture by heating or irradiating the mixture with an ultraviolet light, forming a polymer network liquid crystal layer containing the dichroic dyes.
  • the liquid crystal polymers may be polymerizable by an ultraviolet light or heat.
  • FIG. 9 is a diagram illustrating a method of manufacturing a display device in an embodiment.
  • the display device in the embodiment is a single-side emission display device, with the second substrate being the light emitting side (e.g., corresponding to a display device illustrated in FIG. 1 or FIG. 4) .
  • the method in the embodiment includes forming a metal pattern on the first substrate (e.g., on the inner surface of the first substrate) and forming a light absorbing layer on the first substrate (e.g., on top of the metal pattern) .
  • the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  • the light absorbing layer can be formed using a patterning process. In the method illustrated in FIG.
  • the step of forming the light absorbing layer on the substrate is performed subsequent to the step of forming a metal pattern on the substrate so that the light absorbing layer is formed on top of the metal pattern.
  • the method further includes sequentially forming a quarter wave plate layer and a half wave plate layer on top of the metal pattern.
  • the quarter wave plate layer and the half wave plate layer can be formed using a patterning process. The quarter wave plate layer and the half wave plate layer are so positioned that the light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  • the half wave plate layer and the quarter wave plate layer cover at least the portion covered by the light absorbing layer.
  • the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and/or a source/drain electrode metal pattern in a switching thin film transistor.
  • the metal pattern can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • FIG. 10 is a diagram illustrating a method of manufacturing a display device in another embodiment.
  • the display device in the embodiment is a single-side emission display device, with the first substrate being the light emitting side (e.g., corresponding to a display device illustrated in FIG. 2 or FIG. 5) .
  • the method in the embodiment includes forming a light absorbing layer on top of the first substrate (e.g., on the inner surface of the first substrate) and forming a metal pattern on the first substrate (e.g., on top of the light absorbing layer) .
  • the light absorbing layer can be formed using a patterning process.
  • the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern. In the method illustrated in FIG.
  • the step of forming the light absorbing layer on the substrate is performed prior to the step of forming a metal pattern on the substrate so that the metal pattern is formed on top of the light absorbing layer.
  • the method further includes sequentially forming a half wave plate layer and a quarter wave plate layer on top of the light absorbing layer.
  • the half wave plate layer and the quarter wave plate layer can be formed using a patterning process. The half wave plate and the quarter wave plate are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  • the half wave plate layer and the quarter wave plate layer cover at least the portion covered by the light absorbing layer.
  • the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and/or a source/drain electrode metal pattern in a switching thin film transistor.
  • the metal pattern can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • FIG. 11 is a diagram illustrating a method of manufacturing a display device in another embodiment.
  • the display device in the embodiment is a dual-side emission display device (e.g., corresponding to a display device illustrated in FIG. 3 or FIG. 6) .
  • a dual-side emission display device e.g., corresponding to a display device illustrated in FIG. 3 or FIG. 6 .
  • the method in the embodiment includes forming a first light absorbing layer on top of the first substrate (e.g., on the inner surface of the first substrate) ; sequentially forming a first half wave plate layer and a first quarter wave plate layer on top of the first light absorbing layer; forming a metal pattern on the first substrate (e.g., on top of the quarter wave plate layer) ; sequentially forming a second quarter wave plate layer and a second half wave plate layer on top of the metal pattern; and forming a second light absorbing layer on the first substrate (e.g., on top of the half wave plate layer) .
  • the light absorbing layers, the half wave plate layers, and the quarter wave plate layers can be formed using a patterning process.
  • the first half wave plate layer and the first quarter wave plate layer are so positioned that light reflected by the metal pattern passes through the first quarter wave plate layer and the first half wave plate layer in a sequential order before it is absorbed by the first light absorbing layer.
  • the second quarter wave plate layer and the second half wave plate layer are so positioned that the light reflected by the metal pattern passes through the second quarter wave plate layer and the second half wave plate layer in a sequential order before it is absorbed by the second light absorbing layer.
  • the half wave plate layers and the quarter wave plate layers cover at least the portion covered by the light absorbing layers.
  • the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and a source/drain electrode metal pattern in a switching thin film transistor.
  • the metal pattern can also include other metal patterns such as a touch electrode metal pattern.
  • one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
  • the light absorbing layer may be made of any suitable light filtering material so long as it absorbs light reflected from the metal pattern.
  • the light absorbing layer can be a polarizer, e.g., a liquid crystal polarizer.
  • the display device may be a liquid crystal display (LCD) device or an organic light-emitting display (OLED) device.
  • An OLED device may include an organic light emitting diode.
  • the electrodes of the organic light emitting diode are made of a transparent electrode material such as indium tin oxide (ITO) .
  • ITO indium tin oxide
  • the term “the invention” , “the present invention” or the like does not necessarily limit the claim scope to a specific embodiment, and the reference to exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred.
  • the invention is limited only by the spirit and scope of the appended claims.
  • these claims may refer to use “first” , “second” , etc. following with noun or element.
  • Such terms should be understood as a nomenclature and should not be construed as giving the limitation on the number of the elements modified by such nomenclature unless specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention.

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Abstract

A display device (1) having a metal pattern (12) on a substrate (10) of the display device (1) and a light absorbing layer (16) positioned to absorb light reflected by the metal pattern (12), and a manufacturing method thereof are provided. The light absorbing layer (16) has a pattern corresponding to at least a portion of the metal pattern (12).

Description

DISPLAY DEVICE AND METHOD OF MANUFACTURING THEREOF
CROSS-REFERENCE TO RELATED APPLICATION
This application claims priority to Chinese Patent Application No. 201510370267.4, filed June 29, 2015, the contents of which are incorporated by reference in the entirety.
FIELD
The present invention relates to display technology, more particularly, to a display device and a method of manufacturing thereof.
BACKGROUND
Display devices such as liquid crystal display (LCD) and organic light-emitting display (OLED) have been widely used. LCD and OLED display devices include metal structures such as gate lines and data lines. These metal structures reflect incident light, reducing display quality.
SUMMARY
In one aspect, the present invention provides a display device, comprising a metal pattern on a first substrate of a display device； a first light absorbing layer positioned to absorb light reflected by the metal pattern.
Optionally, the first light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
Optionally, the display device further comprises a first quarter wave plate and a first half wave plate.
Optionally, the first quarter wave plate and the first half wave plate are so positioned that light reflected by the metal pattern passes through the first quarter wave plate and the first half wave plate in a sequential order before it is absorbed by the first light absorbing layer, wherein the first substrate is a substrate proximal to a first light emitting surface of the display device for image display.
Optionally, the metal pattern, the first quarter wave plate, the first half wave plate, and the first light absorbing layer are sequentially arranged on the first substrate along a direction away from the first substrate.
Optionally, the first light absorbing layer, the first half wave plate, the first quarter wave plate, and the metal pattern are sequentially arranged on the first substrate along a direction away from the first substrate.
Optionally, the first light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60％ to 98％, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
Optionally, thickness of the first light absorbing layer is d, wherein d ＝ k λ /σ, k is an integer, λ is wavelength of an incident light reflected by the metal pattern, and σ is refractive index of the first light absorbing layer.
 Optionally, the display device further comprises a second substrate facing the first substrate； a second light absorbing layer positioned to absorb light reflected by the metal pattern； a second quarter wave plate； and a second half wave plate.
Optionally, the second light absorbing layer has a pattern corresponding to at least a portion of the metal pattern； wherein the second quarter wave plate and the second half wave plate are so positioned that light reflected by the second metal pattern passes through the second quarter wave plate and the second half wave plate in a sequential order before it is absorbed by the second light absorbing layer, wherein the second substrate is a substrate proximal to a second light emitting surface of the display device for image display.
Optionally, the first light absorbing layer, the first half wave plate, the first quarter wave plate, the metal pattern, the second quarter wave plate, the second half wave plate, the second light absorbing layer, and the second substrate are sequentially arranged on the first substrate along a direction away from the first substrate.
Optionally, the first light absorbing layer is a polarizer.
Optionally, the display device is an organic electroluminescence display device comprising an organic light emitting diode, the organic light emitting diode is connected to a switching transistor and comprises a transparent electrode.
Optionally, the metal pattern comprising one or more of the following: a gate line metal pattern, a data line metal pattern, a source/drain electrode metal pattern, and a touch electrode metal pattern.
In another aspect, the present invention provides a method of manufacturing a display device, comprising forming a metal pattern on a first substrate； and forming a light absorbing layer on the first substrate.
Optionally, the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
Optionally, the step of forming the light absorbing layer on the first substrate is performed prior to the step of forming a metal pattern on the first substrate so that the metal pattern is formed on top of the light absorbing layer.
Optionally, subsequent to the step of forming the light absorbing layer, and prior to the step of forming the metal pattern, the method further comprises sequentially forming a half wave plate layer and a quarter wave plate layer on top of the light absorbing layer.
Optionally, the half wave plate layer and the quarter wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
Optionally, the step of forming the light absorbing layer on the first substrate is performed subsequent to the step of forming a metal pattern on the first substrate so that the light absorbing layer is formed on top of the metal pattern.
Optionally, subsequent to the step of forming the metal pattern and prior to the step of forming the light absorbing layer on the first substrate, the method further comprises sequentially forming a quarter wave plate layer and a half wave plate layer on top of the metal pattern.
Optionally, the quarter wave plate layer and the half wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
Optionally, the light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer  liquid crystal molecules in the mixture is in the range of 60％to 98％, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
Optionally, thickness of the light absorbing layer is d, wherein d ＝ k λ /σ, k is an integer, λ is the wavelength of the light reflected by the metal pattern and transmitted into the light absorbing layer , and σ is the refractive index of the light absorbing layer.
Optionally, the light absorbing layer is a polarizer.
Optionally, wherein the display device is an organic electroluminescence display device, the method further comprising forming an organic light emitting diode on the first substrate comprising the metal pattern. The organic light emitting diode is connected to a switching transistor, and comprises a transparent electrode.
In another aspect, the present invention provides a method of manufacturing a display device, comprising forming a first light absorbing layer on top of a first substrate； sequentially forming a first half wave plate layer and a first quarter wave plate layer on top of the first light absorbing layer； forming a metal pattern on the first quarter wave plate layer； sequentially forming a second quarter wave plate layer and a second half wave plate layer on the metal pattern； and forming a second light absorbing layer on the second half wave plate layer.
BRIEF DESCRIPTION OF THE FIGURES
The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present invention.
FIG. 1 is a diagram illustrating the structure of a display device in an embodiment.
FIG. 2 is a diagram illustrating the structure of a display device in another embodiment.
FIG. 3 is a diagram illustrating the structure of a display device in another embodiment.
FIG. 4 is a diagram illustrating the structure of a display device in another embodiment.
FIG. 5 is a diagram illustrating the structure of a display device in another embodiment.
FIG. 6 is a diagram illustrating the structure of a display device in another embodiment.
FIG. 7 is a diagram illustrating a method of manufacturing a display device in an embodiment.
FIG. 8 is a diagram illustrating the formation of a light absorbing layer in an embodiment.
FIG. 9 is a diagram illustrating a method of manufacturing a display device in another embodiment.
FIG. 10 is a diagram illustrating a method of manufacturing a display device in another embodiment.
FIG. 11 is a diagram illustrating a method of manufacturing a display device in another embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The disclosure will now describe more specifically with reference to the following embodiments. It is to be noted that the following descriptions of some embodiments are presented herein for purpose of illustration and description only. It is not intended to be exhaustive or to be limited to the precise form disclosed.
FIG. 1 is a diagram illustrating the structure of a display device 1 in an embodiment. Referring to FIG. 1, the display device 1 in the embodiment includes a metal pattern 12 on a first substrate 10 of the display device 1 and a light absorbing layer 16 positioned to absorb light reflected from the metal pattern 12. The light absorbing layer 16 has a pattern corresponding to at least a portion of the metal pattern 12 so that light reflected by at least a portion of the metal pattern 12 is absorbed by the light absorbing layer 16. For example, the light absorbing layer 16 can have a same pattern as the metal pattern 12 so that two patterns overlap with each other in plan of the first substrate. Optionally, the light absorbing layer 16 pattern is larger in area as compared to the metal pattern 12, to ensure that as much as possible light reflected by the metal pattern 12 will be absorbed. Optionally, the light absorbing layer 16 pattern is slightly smaller in area than the metal pattern 12. Optionally, the light absorbing layer 16 is a transparent layer or a semi-transparent layer.
Referring to FIG. 1, the display device 1 in the embodiment also includes a half wave plate 15 and a quarter wave plate 14. The metal pattern 12, the quarter wave plate 14, the half wave plate 15, and the light absorbing layer 16 are sequentially arranged on the first substrate 1 along a direction away from the first substrate 1. In other words, the quarter wave plate 14, the half wave plate 15, and the light absorbing layer 16 are so positioned that light reflected by the metal pattern 12 first passes through the quarter wave plate 15 and the half wave plate 14 in a sequential order before it is absorbed by the light absorbing layer 16.
The light absorbing layer 16 may be made of any suitable light filtering material so long as it absorbs light reflected from the metal pattern 12. For example, the light absorbing layer 16 can be a layer comprising a light absorbing material such as graphite or other black materials. In some embodiments, the light absorbing layer 16 is a polarizer. Optionally, the polarizer is a liquid crystal polarizer. Various suitable liquid crystal materials may be used for making the light absorbing layer 16. For instance, the liquid crystal polarizer 16 can include a mixture of liquid crystal polymer molecules and dichroic dye molecules. The mixture can be cured by, e.g., heat or UV light. Examples of dichroic dyes may be found in U.S. Patent No. 6, 049, 428 and also include anthraquinone series, azo series, azomethine series, benzidine series, indigo series, merocyanine series, perylene series, quinone series, quinophthalone series, stilbene series, styryl series and tetrazine series. In addition to the liquid crystal polymer molecules and the dichroic dye molecules, the mixture may contain additives, such as adhesion and/or toughness enhancers, rheology modifiers, plasticizers, surfactants, leveling agents, etc., depending, for example, on the desired optical properties of the display.
Depending on the types of liquid crystal polymer molecules and dichroic dyes, various liquid crystal polymer to dichroic dye ratios may be used. Optionally, the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1, e.g., 3: 2 to 13: 7, 13: 7 to 2: 3, 2: 3 to 3: 1, 3: 1 to 4: 1, 4: 1 to 17: 3, 17: 3 to 9: 1, 9: 1 to 19: 1, 19: 1 to 49: 2. Optionally, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60％to 98％, e.g., 60％-65％, 65％-70％, 70％-75％, 75％-80％, 80％-85％, 85％-90％, 90％-95％, 95％-98％. Optionally, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, e.g., 2％-5％, 5％-10％, 10％-15％, 15％-20％, 20％-25％, 25％-30％, 30％-35％, 35％-40％.
 In some embodiments, the thickness of the light absorbing layer 16 may be determined by the expression d ＝ k λ /σ, k is an integer, λ is the wavelength of the incident  light, and σ is the refractive index of the light absorbing layer. Specifically, the thickness of the light absorbing layer 16 may be so designed that the phase difference between the incident light and the light reflected by the light absorbing layer 16 after only single reflection is multiple of the wavelength of the light.
In some embodiments, the light absorbing layer 16 is a linear polarizer 16, and the display device includes a half wave plate 15 sandwiched between the linear polarizer 16 and a quarter wave plate 14. An incident light passes through the linear polarizer 16 and is linearly polarized. In some embodiments, the half wave plate 15 has its optics axis set at an angleα with respect to the transmission axis of the linear polarizer 16. When the linearly polarized light from the linear polarizer 16 passes through the half wave plate 15, the plane of polarization of the light will be rotated by 2α. The quarter wave plate 14 has its optics axis set at an angle of 2α plus 45 degrees, with respect to the transmission axis of the linear polarizer 16. Thus, when the linearly polarized light from the half wave plate 15 enters into the quarter wave plate 14, it is converted into circularly polarized light, e.g., left circularly polarized light. The left circularly polarized light is then reflected from the metal pattern 12, and is converted into right circularly polarized light. The reflected, right circularly polarized light enters into the quarter wave plate 14. The right circularly polarized light is circularly polarized a second time by the quarter wave plate 14, and is now converted into linearly polarized light having a polarization direction perpendicular to the transmission axis of the linear polarizer 16. Accordingly, no reflected light passes through the linear polarizer 16.
Optionally, the half wave plate 15 has its optics axis set at 15 degrees with respect to the transmission axis of the polarizer 16, and the quarter wave plate 14 has its optics axis set at 75 degrees with respect to the transmission axis of the polarizer 16. When light passes through the polarizer 16, it becomes vertically polarized. The vertically polarized light is converted into left circularly polarized light after it passes through the half wave plate 15 and the quarter wave plate 14. The left circularly polarized light becomes right circularly polarized light after it is reflected by the metal pattern 12. Subsequently, the right circularly polarized light passes through the quarter wave plate 14 and the half wave plate 15, and is now converted into horizontally polarized light, the direction of which is vertical to the transmission axis of the polarizer 16. Thus, the horizontally polarized light cannot pass through the polarizer 16.
The display device may be a liquid crystal display (LCD) device or an organic light-emitting display (OLED) device. An OLED device may include an organic light emitting  diode. Optionally, the electrodes of the organic light emitting diode is made of a transparent electrode material such as indium tin oxide (ITO) . The display device may be a single-side emission device (see, e.g., FIGs. 1, 2, 4, and 5) or a dual-side emission device (see, e.g., FIGs. 3 and 6) . In some embodiments, the display device includes a first substrate 10 and a second substrate 11 facing each other. Optionally, the light absorbing layer 16 is disposed on a side of the first substrate 10 facing the second substrate 11 or on a side of the second substrate 11 facing the first substrate 10.
Referring to FIG. 1, the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other. Display device emits light from the second substrate 11 for image display. The display device in the embodiment also includes a metal pattern 12 on top of the first substrate 10, and a transparent electrode 13 connected to a drain electrode of a switching thin film transistor. The transparent electrode 13 can be, for example, a pixel electrode in a liquid crystal display device or an anode in an organic electroluminescence display device. The display device in the embodiment further includes a quarter wave plate 14 on top of the metal pattern 12 and the transparent electrode 13, a half wave plate 15 on top of the quarter wave plate 14, and a light absorbing layer 16 (e.g., a polarizer) on top of the half wave plate 15. The light absorbing layer 16 is disposed on the light emitting side of the display device, and has a pattern corresponding to at least a portion of the metal pattern 12. The switching thin film transistor may include a gate electrode, a source electrode, a drain electrode, and an active layer. The metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and/or a source/drain electrode metal pattern 122 in a switching thin film transistor. Optionally, the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
FIG. 2 is a diagram illustrating the structure of a display device in another embodiment. Referring to FIG. 2, the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other. Display device emits light from the first substrate 10 for image display. The display device in the embodiment also includes a light absorbing layer 16 on top of the first substrate 10 (e.g., on the inner surface of the first substrate 10) , a half wave plate 15 on top of the light absorbing layer 16, a quarter wave plate 14 on top of the half wave plate 15. The display device also includes, on top of the quarter wave plate 14, a metal pattern 12 and a transparent electrode 13 connected to a drain electrode of a switching thin film transistor. The transparent electrode 13 can be, for example,  a pixel electrode in a liquid crystal display device or an anode in an organic electroluminescence display device. The metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and/or a source/drain electrode metal pattern 12 in a switching thin film transistor. Optionally, the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material. The light absorbing layer 16 is disposed on the light emitting side of the display device, and has a pattern corresponding to at least a portion of the metal pattern 12.
FIG. 3 is a diagram illustrating the structure of a display device in another embodiment. Referring to FIG. 3, the display device in the embodiment includes a first substrate 10 and a second substrate 11 facing each other. The display device in the embodiment is a dual-side emission device for image display. The display device in the embodiment also includes a first light absorbing layer 16 on top of the first substrate 10 (e.g., on the inner surface of the first substrate 10) , a first half wave plate 15 on top of the first light absorbing layer 16, a first quarter wave plate 14 on top of the first half wave plate 15, a metal pattern 12 and a transparent electrode 13 connected to a drain electrode of the switching thin film transistor on top of the first quarter wave plate 14, a second quarter wave plate 14 on top of the metal pattern 12 and the transparent electrode 13, a second half wave plate 15 on top of the second quarter wave plate 14, a second light absorbing layer 16 on top of the second half wave plate 15, and a second substrate 11 on top of the second light absorbing layer 16. The first and second light absorbing layers 16 are disposed on the two light emitting sides of the display device, and have a pattern corresponding to at least a portion of the metal pattern 12.The metal pattern 12 in the embodiment includes a gate line metal pattern 120, a data line metal pattern, and a source/drain electrode metal pattern 122 in a switching thin film transistor. Optionally, the metal pattern 12 can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
FIGs. 4-6 are diagrams illustrating the structures of display devices in some embodiments. The embodiments shown in FIGs. 4-6 correspond to the embodiments as shown in FIGs. 1-3, respectively, with the difference that the half wave plates 15 and the quarter wave plates 14 in FIGs. 4-6 are not limited to the areas corresponding to the light absorbing layers 16. In FIGs. 1-3, the half wave plates 15 and the quarter wave plates 14 are disposed over the same areas covered by the light absorbing layers 16. In FIGs. 4-6, the half wave plates 15 and the quarter wave plates 14 additionally cover areas outside of those by the  light absorbing layers 16. Optionally, the half wave plates 15 and the quarter wave plates 14 cover the entire display panel.
Optionally, in a dual-side emission display device, the widths of two light absorbing layers 16 are the same. Optionally, in a dual-side emission display device, the widths of two half wave plates 15 are the same, and/or the width of two quarter wave plates 14 are the same. Optionally, the widths of the half wave plates 15 and the quarter wave plates 14 substantially equal to the width of the display panel. The transistor can be a top gate transistor (i.e., the gate electrode is disposed on top of the source and drain) or a bottom gate transistor (i.e., the gate electrode is disposed underneath the source and drain) .
FIG. 7 is a diagram illustrating a method of manufacturing a display device in an embodiment. Referring to FIG. 7, the method in the embodiment includes forming a metal pattern on a substrate and forming a light absorbing layer on the substrate. Optionally, the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern. Optionally, the light absorbing layer can be patterned using a patterning process.
Optionally, the light absorbing layer (e.g., a liquid crystal polarizer) includes a mixture of liquid crystal polymer molecules and dichroic dye molecules. The mixture can be cured by, e.g., heat or ultraviolet light. Depending on the types of liquid crystal polymer molecules and dichroic dyes, various liquid crystal polymer to dichroic dye ratios may be used. Optionally, the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1, e.g., 3: 2 to 13: 7, 13: 7 to 2: 3, 2: 3 to 3: 1, 3:1 to 4: 1, 4: 1 to 17: 3, 17: 3 to 9: 1, 9: 1 to 19: 1, 19: 1 to 49: 2. Optionally, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60％to 98％, e.g., 60％-65％, 65％-70％, 70％-75％, 75％-80％, 80％-85％, 85％-90％, 90％-95％, 95％-98％. Optionally, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, e.g., 2％-5％, 5％-10％, 10％-15％, 15％-20％, 20％-25％, 25％-30％, 30％-35％, 35％-40％. In addition to the liquid crystal polymer molecules and the dichroic dye molecules, the mixture may contain additives, such as adhesion and/or toughness enhancers, rheology modifiers, plasticizers, surfactants, leveling agents, etc., depending, for example, on the desired optical properties of the display.
FIG. 8 is a diagram illustrating the formation of a light absorbing layer in an embodiment. Referring to FIG. 8, the light absorbing layer includes a mixture of liquid crystal polymer molecules (white rods in FIG. 8) and dichroic dye molecules (black rods in FIG. 8) . The structures of the mixture before and after the curing are shown in FIG. 8A and  FIG. 8B, respectively. Specifically, the method of forming the light absorbing layer in the embodiment includes mixing liquid crystal polymer molecules and dichroic dye molecules, forming a liquid crystal polymer-dichroic dye mixture, curing the mixture by heating or irradiating the mixture with an ultraviolet light, forming a polymer network liquid crystal layer containing the dichroic dyes. The liquid crystal polymers may be polymerizable by an ultraviolet light or heat.
FIG. 9 is a diagram illustrating a method of manufacturing a display device in an embodiment. The display device in the embodiment is a single-side emission display device, with the second substrate being the light emitting side (e.g., corresponding to a display device illustrated in FIG. 1 or FIG. 4) . Referring to FIG. 9, the method in the embodiment includes forming a metal pattern on the first substrate (e.g., on the inner surface of the first substrate) and forming a light absorbing layer on the first substrate (e.g., on top of the metal pattern) . The light absorbing layer has a pattern corresponding to at least a portion of the metal pattern. Optionally, the light absorbing layer can be formed using a patterning process. In the method illustrated in FIG. 9, the step of forming the light absorbing layer on the substrate is performed subsequent to the step of forming a metal pattern on the substrate so that the light absorbing layer is formed on top of the metal pattern. Subsequent to the step of forming the metal pattern and prior to the step of forming the light absorbing layer on the substrate, the method further includes sequentially forming a quarter wave plate layer and a half wave plate layer on top of the metal pattern. Optionally, the quarter wave plate layer and the half wave plate layer can be formed using a patterning process. The quarter wave plate layer and the half wave plate layer are so positioned that the light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer. Optionally, the half wave plate layer and the quarter wave plate layer cover at least the portion covered by the light absorbing layer. Optionally, the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and/or a source/drain electrode metal pattern in a switching thin film transistor. Optionally, the metal pattern can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
FIG. 10 is a diagram illustrating a method of manufacturing a display device in another embodiment. The display device in the embodiment is a single-side emission display device, with the first substrate being the light emitting side (e.g., corresponding to a display device illustrated in FIG. 2 or FIG. 5) . Referring to FIG. 10, the method in the embodiment  includes forming a light absorbing layer on top of the first substrate (e.g., on the inner surface of the first substrate) and forming a metal pattern on the first substrate (e.g., on top of the light absorbing layer) . Optionally, the light absorbing layer can be formed using a patterning process. The light absorbing layer has a pattern corresponding to at least a portion of the metal pattern. In the method illustrated in FIG. 10, the step of forming the light absorbing layer on the substrate is performed prior to the step of forming a metal pattern on the substrate so that the metal pattern is formed on top of the light absorbing layer. Subsequent to the step of forming the light absorbing layer and prior to the step of forming the metal pattern, the method further includes sequentially forming a half wave plate layer and a quarter wave plate layer on top of the light absorbing layer. Optionally, the half wave plate layer and the quarter wave plate layer can be formed using a patterning process. The half wave plate and the quarter wave plate are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer. Optionally, the half wave plate layer and the quarter wave plate layer cover at least the portion covered by the light absorbing layer. Optionally, the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and/or a source/drain electrode metal pattern in a switching thin film transistor. Optionally, the metal pattern can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
FIG. 11 is a diagram illustrating a method of manufacturing a display device in another embodiment. The display device in the embodiment is a dual-side emission display device (e.g., corresponding to a display device illustrated in FIG. 3 or FIG. 6) . Referring to FIG. 11, the method in the embodiment includes forming a first light absorbing layer on top of the first substrate (e.g., on the inner surface of the first substrate) ； sequentially forming a first half wave plate layer and a first quarter wave plate layer on top of the first light absorbing layer； forming a metal pattern on the first substrate (e.g., on top of the quarter wave plate layer) ； sequentially forming a second quarter wave plate layer and a second half wave plate layer on top of the metal pattern； and forming a second light absorbing layer on the first substrate (e.g., on top of the half wave plate layer) . Optionally, the light absorbing layers, the half wave plate layers, and the quarter wave plate layers can be formed using a patterning process.
The first half wave plate layer and the first quarter wave plate layer are so positioned that light reflected by the metal pattern passes through the first quarter wave plate  layer and the first half wave plate layer in a sequential order before it is absorbed by the first light absorbing layer. The second quarter wave plate layer and the second half wave plate layer are so positioned that the light reflected by the metal pattern passes through the second quarter wave plate layer and the second half wave plate layer in a sequential order before it is absorbed by the second light absorbing layer. Optionally, the half wave plate layers and the quarter wave plate layers cover at least the portion covered by the light absorbing layers. Optionally, the metal pattern in the embodiment includes a gate line metal pattern, a data line metal pattern, and a source/drain electrode metal pattern in a switching thin film transistor. Optionally, the metal pattern can also include other metal patterns such as a touch electrode metal pattern. Optionally, one or more of gate line, data line, source/drain electrode, touch electrode may be made of a transparent material.
As discussed above, the light absorbing layer may be made of any suitable light filtering material so long as it absorbs light reflected from the metal pattern. For example, the light absorbing layer can be a polarizer, e.g., a liquid crystal polarizer. The display device may be a liquid crystal display (LCD) device or an organic light-emitting display (OLED) device. An OLED device may include an organic light emitting diode. Optionally, the electrodes of the organic light emitting diode are made of a transparent electrode material such as indium tin oxide (ITO) .
The foregoing description of the embodiments of the invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or to exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to practitioners skilled in this art. The embodiments are chosen and described in order to best explain the principles of the invention and its best mode practical application, thereby to enable persons skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use or implementation contemplated. It is intended that the scope of the invention be defined by the claims appended hereto and their equivalents in which all terms are meant in their broadest reasonable sense unless otherwise indicated. Therefore, the term “the invention” , “the present invention” or the like does not necessarily limit the claim scope to a specific embodiment, and the reference to exemplary embodiments of the invention does not imply a limitation on the invention, and no such limitation is to be inferred. The invention is limited only by the spirit and scope of the appended claims. Moreover, these claims may refer to use “first” , “second” , etc. following with noun or element. Such terms  should be understood as a nomenclature and should not be construed as giving the limitation on the number of the elements modified by such nomenclature unless specific number has been given. Any advantages and benefits described may not apply to all embodiments of the invention. It should be appreciated that variations may be made in the embodiments described by persons skilled in the art without departing from the scope of the present invention as defined by the following claims. Moreover, no element and component in the present disclosure is intended to be dedicated to the public regardless of whether the element or component is explicitly recited in the following claims.

Claims (21)

  1. A display device, comprising:
    a metal pattern on a first substrate of a display device；
    a first light absorbing layer positioned to absorb light reflected by the metal pattern；
    wherein the first light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  2. The display device of claim 1, further comprising:
    a first quarter wave plate； and
    a first half wave plate；
    wherein the first quarter wave plate and the first half wave plate are so positioned that light reflected by the metal pattern passes through the first quarter wave plate and the first half wave plate in a sequential order before it is absorbed by the first light absorbing layer, wherein the first substrate is a substrate proximal to a first light emitting surface of the display device for image display.
  3. The display device of claim 2, wherein the metal pattern, the first quarter wave plate, the first half wave plate, and the first light absorbing layer are sequentially arranged on the first substrate along a direction away from the first substrate.
  4. The display device of claim 2, wherein the first light absorbing layer, the first half wave plate, the first quarter wave plate, and the metal pattern are sequentially arranged on the first substrate along a direction away from the first substrate.
  5. The display device of claim 1, wherein the first light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60％to 98％, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
  6. The display device of claim 3, wherein thickness of the first light absorbing layer is d, wherein d ＝ k λ /σ, k is an integer, λ is wavelength of an incident light reflected by the metal pattern, and σ is refractive index of the first light absorbing layer.
  7. The display device of claim 2, further comprising:
    a second substrate facing the first substrate；
    a second light absorbing layer positioned to absorb light reflected by the metal pattern；
    a second quarter wave plate； and
    a second half wave plate；
    wherein the second light absorbing layer has a pattern corresponding to at least a portion of the metal pattern； wherein the second quarter wave plate and the second half wave plate are so positioned that light reflected by the second metal pattern passes through the second quarter wave plate and the second half wave plate in a sequential order before it is absorbed by the second light absorbing layer, wherein the second substrate is a substrate proximal to a second light emitting surface of the display device for image display.
  8. The display device of claim 7, wherein the first light absorbing layer, the first half wave plate, the first quarter wave plate, the metal pattern, the second quarter wave plate, the second half wave plate, the second light absorbing layer, and the second substrate are sequentially arranged on the first substrate along a direction away from the first substrate.
  9. The display device of claim 1, wherein the first light absorbing layer is a polarizer.
  10. The display device of any one of claims 1-6, wherein the display device is an organic electroluminescence display device comprising an organic light emitting diode, the organic light emitting diode is connected to a switching transistor and comprises a transparent electrode.
  11. The display device of claim 1, wherein the metal pattern comprising one or more of the following: a gate line metal pattern, a data line metal pattern, a source/drain electrode metal pattern, and a touch electrode metal pattern.
  12. A method of manufacturing a display device, comprising:
    forming a metal pattern on a first substrate； and
    forming a light absorbing layer on the first substrate, wherein the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.
  13. The method of claim 12, wherein the step of forming the light absorbing layer on the first substrate is performed prior to the step of forming a metal pattern on the first substrate so that the metal pattern is formed on top of the light absorbing layer.
  14. The method of claim 13, subsequent to the step of forming the light absorbing layer, and prior to the step of forming the metal pattern, further comprising sequentially forming a half wave plate layer and a quarter wave plate layer on top of the light absorbing layer；
    wherein the half wave plate layer and the quarter wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  15. The method of claim 12, wherein the step of forming the light absorbing layer on the first substrate is performed subsequent to the step of forming a metal pattern on the first substrate so that the light absorbing layer is formed on top of the metal pattern.
  16. The method of claim 15, subsequent to the step of forming the metal pattern and prior to the step of forming the light absorbing layer on the first substrate, further comprising sequentially forming a quarter wave plate layer and a half wave plate layer on top of the metal pattern；
    wherein the quarter wave plate layer and the half wave plate layer are so positioned that light reflected by the metal pattern passes through the quarter wave plate layer and the half wave plate layer in a sequential order before it is absorbed by the light absorbing layer.
  17. The method of any one of claims 12-16, wherein the light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, the total weight percentage of the polymer liquid crystal molecules in the mixture is in the range of 60％to 98％, the total weight percentage of the dichroic dye molecules in the mixture is in the range of 2％to 40％, or the weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in the range of 3: 2 to 49: 1.
  18. The method of claim 17, wherein thickness of the light absorbing layer is d, wherein d ＝ k λ /σ, k is an integer, λ is the wavelength of the light reflected by  the metal pattern and transmitted into the light absorbing layer , and σ is the refractive index of the light absorbing layer.
  19. The method of claim 18, wherein the light absorbing layer is a polarizer.
  20. The method of any one of claims 12-19, wherein the display device is an organic electroluminescence display device, the method further comprising forming an organic light emitting diode on the first substrate comprising the metal pattern；
    wherein the organic light emitting diode is connected to a switching transistor, and comprises a transparent electrode.
  21. A method of manufacturing a display device, comprising:
    forming a first light absorbing layer on top of a first substrate；
    sequentially forming a first half wave plate layer and a first quarter wave plate layer on top of the first light absorbing layer；
    forming a metal pattern on the first quarter wave plate layer；
    sequentially forming a second quarter wave plate layer and a second half wave plate layer on the metal pattern； and
    forming a second light absorbing layer on the second half wave plate layer.
PCT/CN2015/096934 2015-06-29 2015-12-10 Display device and method of manufacturing thereof WO2017000502A1 (en)

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104914615A (en) * 2015-06-29 2015-09-16 京东方科技集团股份有限公司 Display device and manufacture method thereof
CN108074938B (en) * 2016-11-14 2020-06-09 京东方科技集团股份有限公司 Array substrate, manufacturing method thereof and display device
WO2018176327A1 (en) * 2017-03-30 2018-10-04 Boe Technology Group Co., Ltd. Array substrate, display panel, display apparatus, and fabricating method thereof
KR102343509B1 (en) * 2017-06-19 2021-12-27 삼성디스플레이 주식회사 Panel bottom sheet and display including the same
CN107256881B (en) * 2017-06-28 2020-05-08 京东方科技集团股份有限公司 Display panel, manufacturing method thereof and display device
CN107144911A (en) 2017-06-30 2017-09-08 深圳市华星光电技术有限公司 The preparation method and display panel of dyestuff polaroid
CN108878681A (en) * 2018-06-27 2018-11-23 上海天马微电子有限公司 Organic light-emitting display panel and display device
CN109659340B (en) * 2018-12-12 2021-01-01 武汉华星光电半导体显示技术有限公司 Display panel and preparation method thereof
CN111585169B (en) * 2019-02-18 2021-05-28 中国科学院化学研究所 Liquid crystal laser display panel and construction method thereof
CN109860270B (en) * 2019-04-01 2021-07-02 上海天马有机发光显示技术有限公司 Display panel and display device
CN110927857A (en) * 2019-12-14 2020-03-27 浙江怡诚光电科技有限公司 Circular polarizing plate with brightening function for OLED display and application thereof
CN112466244B (en) * 2020-12-18 2022-07-15 合肥维信诺科技有限公司 Display panel and display device
WO2022138555A1 (en) * 2020-12-21 2022-06-30 富士フイルム株式会社 Light absorption anisotropic film, viewing angle control system, and image display device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001091971A (en) * 1999-09-20 2001-04-06 Matsushita Electric Ind Co Ltd Liquid crystal display panel
CN1334483A (en) * 2000-07-26 2002-02-06 精工爱普生株式会社 Electrooptical device, base plate for electrooptical device and projection type display device
CN1402538A (en) * 2001-08-03 2003-03-12 日本电气株式会社 TFT array substrate and active array addressing LCD device
KR20140126984A (en) * 2013-04-24 2014-11-03 하이디스 테크놀로지 주식회사 Liquid crystal display
CN104160307A (en) * 2012-03-05 2014-11-19 东友精细化工有限公司 Absorptive polarizer and production method therefor
CN104914615A (en) * 2015-06-29 2015-09-16 京东方科技集团股份有限公司 Display device and manufacture method thereof

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3802658B2 (en) * 1997-08-07 2006-07-26 セイコーエプソン株式会社 Liquid crystal display device and electronic apparatus using the same
JP2003114325A (en) * 2001-10-03 2003-04-18 Nitto Denko Corp Laminated quarter-wave plate, circularly polarizing plate and liquid crystal display device using the same, and method for manufacturing the same
US20060164571A1 (en) 2002-10-14 2006-07-27 Koninklijke Phillips Electronics N.C. Polarizing arrangement
JP4184189B2 (en) * 2003-08-13 2008-11-19 株式会社 日立ディスプレイズ Light-emitting display device
JP4485184B2 (en) * 2003-12-15 2010-06-16 株式会社半導体エネルギー研究所 LIGHT EMITTING DEVICE AND ELECTRONIC DEVICE
KR101097341B1 (en) * 2010-03-09 2011-12-23 삼성모바일디스플레이주식회사 Organic light emitting display apparatus
US20130303677A1 (en) * 2012-05-08 2013-11-14 Samsung Electronics Co., Ltd. Composition for polarizing film, polarizing film, and display device including the polarizing film
CN102881711B (en) * 2012-09-25 2014-11-12 南京中电熊猫液晶显示科技有限公司 Active organic light emitting diode (OLED)
KR20140131473A (en) * 2013-05-03 2014-11-13 삼성디스플레이 주식회사 Organic light emitting display device and manufacturing method thereof
KR20150014656A (en) * 2013-07-30 2015-02-09 삼성디스플레이 주식회사 Display panel having a polarizer
CN103500753B (en) * 2013-09-24 2016-08-17 青岛海信电器股份有限公司 A kind of OLED display panel
TWI544240B (en) 2013-09-30 2016-08-01 Ｌｇ化學股份有限公司 Optical element
CN103531610A (en) 2013-10-28 2014-01-22 京东方科技集团股份有限公司 Bottom emission substrate, display device and manufacturing method of substrate
KR102092082B1 (en) * 2013-11-11 2020-03-23 엘지디스플레이 주식회사 Organic Light Emitting Display Device and Method of manufacturing the same
CN103811532B (en) * 2014-01-28 2016-07-06 京东方科技集团股份有限公司 A kind of display device and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001091971A (en) * 1999-09-20 2001-04-06 Matsushita Electric Ind Co Ltd Liquid crystal display panel
CN1334483A (en) * 2000-07-26 2002-02-06 精工爱普生株式会社 Electrooptical device, base plate for electrooptical device and projection type display device
CN1402538A (en) * 2001-08-03 2003-03-12 日本电气株式会社 TFT array substrate and active array addressing LCD device
CN104160307A (en) * 2012-03-05 2014-11-19 东友精细化工有限公司 Absorptive polarizer and production method therefor
KR20140126984A (en) * 2013-04-24 2014-11-03 하이디스 테크놀로지 주식회사 Liquid crystal display
CN104914615A (en) * 2015-06-29 2015-09-16 京东方科技集团股份有限公司 Display device and manufacture method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3320388A4 *

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US10096801B2 (en) 2018-10-09

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