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WO2025208324A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage

Info

Publication number
WO2025208324A1
WO2025208324A1 PCT/CN2024/085488 CN2024085488W WO2025208324A1 WO 2025208324 A1 WO2025208324 A1 WO 2025208324A1 CN 2024085488 W CN2024085488 W CN 2024085488W WO 2025208324 A1 WO2025208324 A1 WO 2025208324A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
wavelength range
color light
display device
liquid crystal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/085488
Other languages
English (en)
Chinese (zh)
Inventor
姚正宏
廖奇璋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iris Optronics Co Ltd
Original Assignee
Iris Optronics 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 Iris Optronics Co Ltd filed Critical Iris Optronics Co Ltd
Priority to PCT/CN2024/085488 priority Critical patent/WO2025208324A1/fr
Publication of WO2025208324A1 publication Critical patent/WO2025208324A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Definitions

  • the present invention relates to the field of display technology, and more particularly, to a display device.
  • An object of the present invention is to provide a display device to solve the technical problem of insufficient color purity of display devices in the prior art when displaying at a wide viewing angle.
  • the present application provides a display device, which includes: a first selective light reflecting component, which is configured to reflect a first color light; a second selective light reflecting component, which is arranged above the first selective light reflecting component and is configured to reflect a second color light and allow the first color light to pass through; and a filter component, which is arranged between the first selective light reflecting component and the second selective light reflecting component, and the absorption wavelength range of the filter component overlaps with the wavelength range of the second color light.
  • the present application provides a display device comprising: a first liquid crystal layer configured to reflect a first color light; a filter layer disposed on the first liquid crystal layer; and a second liquid crystal layer disposed on the filter layer and configured to reflect a second color light having a wavelength range substantially the same as the absorption wavelength range of the filter layer.
  • a display device comprising: a first liquid crystal layer configured to reflect a first color light; a filter layer disposed on the first liquid crystal layer, wherein the wavelength range of light absorbed by the filter layer does not overlap with the wavelength range of the first color light; and a second liquid crystal layer disposed on the filter layer.
  • the layer is configured to reflect the second color light and allow the first color light to pass through.
  • the present application provides a display device that, by disposing a filter component (i.e., a filter layer) between a first selective light reflecting component (i.e., a first liquid crystal layer) and a second selective light reflecting component (i.e., a second liquid crystal layer), can absorb interfering light (excluding the first color light) reflected by the first selective light reflecting component (i.e., the first liquid crystal layer). This prevents color shift in the display color of the display device across a wide viewing angle, thereby improving the purity of the displayed color.
  • a filter component i.e., a filter layer
  • FIG1 is a schematic structural diagram of a display device provided in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a light path of the display device of FIG. 1 .
  • FIG3 is a schematic structural diagram of a display device provided in an embodiment of the present application.
  • Figure 1 is a schematic diagram of the structure of a display device 1 provided in an embodiment of the present application.
  • Figure 2 is a schematic diagram of the light path of the display device 1 in Figure 1 .
  • the display device 1 includes a first selective light reflecting component 20, a filter component 30, a light absorbing layer 40, and a second selective light reflecting component 50.
  • the display device 1 may include, but is not limited to, a liquid crystal display device.
  • the display device 1 may include, but is not limited to, a cholesteric liquid crystal display device.
  • the first selective light-reflecting component 20 can be configured to reflect the first color light L1 .
  • the first selective light-reflecting component 20 can include a first cholesteric liquid crystal 23. Therefore, in some embodiments of the present application, the first selective light-reflecting component 20 can also be referred to as the "first liquid crystal layer 20."
  • the first selective light-reflecting component 20 i.e., the first liquid crystal layer 20
  • the first selective light-reflecting component 20 can further include a conductive substrate (e.g., a lower conductive substrate) 21, a conductive substrate (e.g., an upper conductive substrate) 22, and a first sealant 24.
  • the first cholesteric liquid crystal 23 can be disposed between the conductive substrate (e.g., the lower conductive substrate) 21 and the conductive substrate (e.g., the upper conductive substrate) 22.
  • the first sealant 24 can surround the first cholesteric liquid crystal 23.
  • the first sealant 24 can seal the first cholesteric liquid crystal 23 together with the conductive substrate (e.g., the lower conductive substrate) 21 and the conductive substrate (e.g., the upper conductive substrate) 22.
  • the conductive substrate (e.g., the lower conductive substrate) 21 can include a base material (e.g., a lower base material) 211 and an electrode layer (e.g., a lower electrode layer) 212.
  • the conductive substrate (e.g., upper conductive substrate) 22 may include a substrate (e.g., upper substrate) 221 and an electrode layer (e.g., upper electrode layer) 222.
  • the substrate (e.g., lower substrate) 211 and the substrate (e.g., upper substrate) 221 may be glass substrates.
  • the electrode layer (e.g., lower electrode layer) 212 may be disposed on (e.g., upper surface) of the substrate (e.g., lower substrate) 211.
  • the electrode layer (e.g., upper electrode layer) 222 may be disposed on (e.g., lower surface) of the substrate (e.g., upper substrate) 221.
  • the electrode layer (e.g., lower electrode layer) 212 and the electrode layer (e.g., upper electrode layer) 222 may include, but are not limited to, indium tin oxide (ITO) electrodes.
  • the first selective light reflecting element 20 i.e., the first liquid crystal layer 20
  • the first cholesteric liquid crystal 23 can be rotated at an angle or in a parallel state to reflect the first color light L 1 .
  • the first cholesteric liquid crystal 23 can be in a vertical state, or a focal-conic state, and not reflect the first color light L 1 .
  • the first color light L1 has a wavelength range ⁇ 1 .
  • the first color light L1 is the color light required for the display device 1 to display colors.
  • the first color light L1 may include but is not limited to green light, red light or yellow light.
  • the first selective light reflection component 20 (i.e., the first liquid crystal layer 20) can reflect the third color light L3 .
  • the third color light L3 is light traveling in a direction with a large viewing angle (e.g., a viewing angle greater than or equal to 140°).
  • the third color light L3 can be incident on the display device 1 at an incident angle greater than or equal to 70°.
  • the third color light L3 has a wavelength range ⁇ 3 .
  • the wavelength range ⁇ 3 of the third color light L3 is the same as the wavelength range of the first color light L1.
  • the ranges ⁇ 1 do not overlap.
  • the filter assembly 30 can be disposed on the first selective light-reflecting assembly 20 (i.e., the first liquid crystal layer 20).
  • the filter assembly 30 can also be referred to as the "filter layer 30."
  • the first cholesteric liquid crystal 23 of the first selective light-reflecting assembly 20 i.e., the first liquid crystal layer 20
  • the filter assembly 30 can reflect the first color light L1 toward the filter assembly 30 (i.e., the filter layer 30).
  • the light absorbing layer 40 may be disposed below the first selective light reflecting component 20 (i.e., the first liquid crystal layer 20).
  • the light absorbing layer 40 may be configured to absorb non-reflected light (including, for example, light not reflected by the first selective light reflecting component 20).
  • the light absorbing layer 40 may be separated from the light filtering component 30 (i.e., the light filtering layer 30) by the first selective light reflecting component 20 (i.e., the first liquid crystal layer 20).
  • the second selective light-reflecting component 50 may be disposed above the first selective light-reflecting component 20 (i.e., the first liquid crystal layer 20).
  • the second selective light-reflecting component 50 may be configured to reflect the second color light L2 .
  • the second selective light-reflecting component 50 allows the first color light L1 to pass through.
  • the second selective light-reflecting component 50 may include a second cholesteric liquid crystal 53.
  • the second selective light-reflecting component 50 may also be referred to as the "second liquid crystal layer 50."
  • the second selective light-reflecting component 50 i.e., the second liquid crystal layer 50
  • the second selective light-reflecting component 50 may further include a conductive substrate (e.g., a lower conductive substrate) 51, a conductive substrate (e.g., an upper conductive substrate) 52, and a second sealing material 54.
  • the second cholesteric liquid crystal 53 may be disposed between the conductive substrate (e.g., the lower conductive substrate) 51 and the conductive substrate (e.g., the upper conductive substrate) 52.
  • the second sealing material 54 may surround the second cholesteric liquid crystal 53.
  • the second sealing material 54 may, together with the conductive substrate (e.g., the lower conductive substrate) 51 and the conductive substrate (e.g., the upper conductive substrate) 52, seal the second cholesteric liquid crystal 53.
  • a conductive substrate (e.g., a lower conductive substrate) 51 may include a base material (e.g., a lower base material) 511 and an electrode layer (e.g., a lower electrode layer) 512.
  • a conductive substrate (e.g., an upper conductive substrate) 52 may include a base material (e.g., an upper base material) 521 and an electrode layer (e.g., an upper electrode layer) 522.
  • the base material (e.g., the lower base material) 511 and the base material (e.g., the upper base material) 521 may be glass substrates.
  • the electrode layer (e.g., the lower electrode layer) 512 may be disposed on the base material (e.g., the lower base material) 511 (e.g., the upper surface).
  • the electrode layer (e.g., the upper electrode layer) 522 may be disposed on the base material (e.g., the upper base material) 521 (e.g., the lower surface).
  • the electrode layer (e.g., the lower electrode layer) 512 and the electrode layer (e.g., the upper electrode layer) 522 may include, but are not limited to, indium tin oxide (ITO) electrodes.
  • ITO indium tin oxide
  • the second selective light-reflecting element 50 i.e., the second liquid crystal layer 50
  • the second selective light-reflecting element 50 can determine the rotation direction of the second cholesteric liquid crystal 53 by using the voltage difference between the electrode layer (e.g., the lower electrode layer) 512 and the electrode layer (e.g., the upper electrode layer) 522.
  • the second cholesteric liquid crystal 53 can be rotated at an angle or assume a parallel orientation to reflect the second color light L2 .
  • the second cholesteric liquid crystal 53 can assume a homeotropic orientation, or a focal-conic state, and not reflect the second color light L2 .
  • the second selective light-reflecting component 50 may be disposed on the filter component 30 (i.e., the filter layer 30), such that the filter component 30 (i.e., the filter layer 30) is located or disposed between the first selective light-reflecting component 20 (i.e., the first liquid crystal layer 20) and the second selective light-reflecting component 50 (i.e., the second liquid crystal layer 50).
  • the filter component 30 i.e., the filter layer 30
  • the filter layer 30 may contact the first selective light-reflecting component 20 (i.e., the first liquid crystal layer 20).
  • the filter component 30 may contact the conductive substrate 22. In some embodiments of the present application, the filter component 30 (i.e., the filter layer 30) may contact the second selective light-reflecting component 50 (i.e., the second liquid crystal layer 50). In some embodiments of the present application, the filter component 30 (i.e., the filter layer 30) may contact the conductive substrate 51. In some embodiments of the present application, the second cholesteric liquid crystal 53 of the second selective light reflector 50 (i.e., the second liquid crystal layer 50) can reflect the second color light L2 in a direction opposite to the filter element 30 (i.e., the filter layer 30). Furthermore, the filter element 30 (i.e., the filter layer 30) is structurally located between the first cholesteric liquid crystal 23 and the second cholesteric liquid crystal 53.
  • the second color light L2 has a wavelength range ⁇ 2 .
  • the second color light L2 is the color light required for the display device 1 to display colors.
  • the wavelength range ⁇ 2 of the second color light L2 may be smaller (including, for example, an upper wavelength range limit and a lower wavelength range limit) than the wavelength range ⁇ 1 of the first color light L1 .
  • the second color light L2 may include, but is not limited to, blue light, cyan light, or green light.
  • the display device 1 displays a single color using only the first color light L1 reflected by the first selective light reflecting element 20 (i.e., the first liquid crystal layer 20), and the wavelength range ⁇ 3 of the third color light L3 overlaps with or is substantially the same as the wavelength range ⁇ 2 of the second color light L2 , the third color light L3 may mix with the first color light L1 at a wide viewing angle (e.g., a viewing angle greater than or equal to 140°), resulting in insufficient purity of the displayed single color (i.e., a color shift).
  • a wide viewing angle e.g., a viewing angle greater than or equal to 140°
  • the filter element 30 (i.e., the filter layer 30) has an absorption wavelength range ⁇ a .
  • the absorption wavelength range ⁇ a of the filter element 30 i.e., the filter layer 30
  • the absorption wavelength range ⁇ a of the filter element 30 may also overlap or be substantially the same as the wavelength range ⁇ 2 of the second color light L 2.
  • the absorption wavelength range ⁇ a of the filter element 30 does not overlap with the wavelength range ⁇ 1 of the first color light L 1 , thereby avoiding the problem of color cast.
  • the absorption wavelength range ⁇ a of the filter element 30 may be smaller than the wavelength range ⁇ 1 of the first color light L1 in terms of value (including, for example, the upper and lower limits of the wavelength range ) .
  • the second color light L2 reflected by the second selective light reflecting element 50 is blue light, and its wavelength range ⁇ 2 is 415nm to 500nm;
  • the second color light L2 reflected by the second selective light reflecting element 50 is blue light, and its wavelength range ⁇ 2 is 415nm to 500nm;
  • the wavelength range ⁇ a of light absorbed by the filter element 30 is 415 nm to 500 nm.
  • the display device of Example 4 can generate colors including at least yellow, blue, white, and black. Furthermore, after measurement with a color analyzer, no color shift occurs, indicating that color purity has been improved.
  • the first color light L1 reflected by the first selective light reflecting component 20 is red light, and its wavelength range ⁇ 1 is 590nm to 740nm;
  • the second color light L2 reflected by the second selective light reflecting element 50 is cyan light, and its wavelength range ⁇ 2 is 460nm to 550nm;
  • the absorption wavelength range ⁇ a of the filter element 30 (ie, the filter layer 30) is 460 nm to 550 nm.
  • the display device of Example 5 can generate colors including at least cyan, red, white, and black. Furthermore, after measurement with a color analyzer, no color shift occurs, indicating that color purity has been improved.
  • the first color light L1 reflected by the first selective light reflecting component 20 is yellow light, and its wavelength range ⁇ 1 is 520nm to 640nm;
  • the second color light L2 reflected by the second selective light reflecting element 50 is cyan light, and its wavelength range ⁇ 2 is 460nm to 550nm;
  • the absorption wavelength range ⁇ a of the filter element 30 (ie, the filter layer 30) is 460 nm to 550 nm.
  • FIG3 is a schematic diagram of the structure of a display device 1a provided in an embodiment of the present application.
  • the display device 1a of FIG3 has a similar structure to the display device 1 of FIG1 , except that the substrate 211a of the conductive substrate 21a, the substrate 221a of the conductive substrate 22a, the substrate 511a of the conductive substrate 51a, and the substrate 521a of the conductive substrate 52a in FIG3 are flexible substrates.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un dispositif d'affichage (1), comprenant : un premier ensemble de réflexion de lumière sélective (20), configuré pour réfléchir une première lumière de couleur (L1) ; un second ensemble de réflexion de lumière sélective (50), disposé au-dessus du premier ensemble de réflexion de lumière sélective (20), et configuré pour réfléchir une seconde lumière de couleur (L2) et permettre à la première lumière de couleur (L1) de passer à travers ; et un ensemble filtre (30), disposé entre le premier ensemble de réflexion de lumière sélective (20) et le second ensemble de réflexion de lumière sélective (50), la plage de longueurs d'onde de la lumière à absorber par l'ensemble filtre (30) chevauchant la plage de longueurs d'onde de la seconde lumière de couleur (L2). Selon le dispositif d'affichage (1), la lumière d'interférence réfléchie par le premier ensemble de réflexion de lumière sélective (20), à l'exclusion de la première lumière de couleur (L1), peut être absorbée au moyen de l'ensemble filtre (30), de telle sorte que la couleur d'affichage du dispositif d'affichage (1) dans une direction de grand angle de vision n'a pas de dominante de couleur, ce qui permet d'améliorer la pureté de la couleur d'affichage.
PCT/CN2024/085488 2024-04-02 2024-04-02 Dispositif d'affichage Pending WO2025208324A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/085488 WO2025208324A1 (fr) 2024-04-02 2024-04-02 Dispositif d'affichage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2024/085488 WO2025208324A1 (fr) 2024-04-02 2024-04-02 Dispositif d'affichage

Publications (1)

Publication Number Publication Date
WO2025208324A1 true WO2025208324A1 (fr) 2025-10-09

Family

ID=97265783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/085488 Pending WO2025208324A1 (fr) 2024-04-02 2024-04-02 Dispositif d'affichage

Country Status (1)

Country Link
WO (1) WO2025208324A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1648752A (zh) * 2004-07-09 2005-08-03 友达光电股份有限公司 具有彩色滤光片整合晶体管结构的液晶显示器
CN1987577A (zh) * 2005-12-22 2007-06-27 旭硝子株式会社 液晶显示器及其生产方法
US20080143941A1 (en) * 2005-07-04 2008-06-19 Fujitsu Limited Liquid crystal display device
CN101300517A (zh) * 2005-10-31 2008-11-05 3M创新有限公司 用于高对比度应用的光学元件
CN106255917A (zh) * 2014-04-30 2016-12-21 夏普株式会社 反射投影型显示装置
US11353756B1 (en) * 2021-04-01 2022-06-07 National Sun Yat-Sen University Reflective display and control method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1648752A (zh) * 2004-07-09 2005-08-03 友达光电股份有限公司 具有彩色滤光片整合晶体管结构的液晶显示器
US20080143941A1 (en) * 2005-07-04 2008-06-19 Fujitsu Limited Liquid crystal display device
CN101300517A (zh) * 2005-10-31 2008-11-05 3M创新有限公司 用于高对比度应用的光学元件
CN1987577A (zh) * 2005-12-22 2007-06-27 旭硝子株式会社 液晶显示器及其生产方法
CN106255917A (zh) * 2014-04-30 2016-12-21 夏普株式会社 反射投影型显示装置
US11353756B1 (en) * 2021-04-01 2022-06-07 National Sun Yat-Sen University Reflective display and control method thereof

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