WO2020228214A1 - Affichage à cristaux liquides - Google Patents

Affichage à cristaux liquides Download PDF

Info

Publication number
WO2020228214A1
WO2020228214A1 PCT/CN2019/106994 CN2019106994W WO2020228214A1 WO 2020228214 A1 WO2020228214 A1 WO 2020228214A1 CN 2019106994 W CN2019106994 W CN 2019106994W WO 2020228214 A1 WO2020228214 A1 WO 2020228214A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
electrochromic
conductive layer
backlight module
Prior art date
Application number
PCT/CN2019/106994
Other languages
English (en)
Chinese (zh)
Inventor
袁广中
Original Assignee
深圳市华星光电技术有限公司
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 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Publication of WO2020228214A1 publication Critical patent/WO2020228214A1/fr

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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix

Definitions

  • This application relates to the field of display technology, and in particular to a liquid crystal display.
  • the structure of the liquid crystal display includes a liquid crystal panel and a backlight module.
  • the liquid crystal panel itself does not emit light and needs a light source provided by a backlight module.
  • the liquid crystal panel displays images by driving the orientation of liquid crystal molecules to control the intensity of transmitted light.
  • the contrast of the liquid crystal display is usually on the order of 1000, which is much lower than the contrast of self-luminous display devices such as OLED (organic light emitting diode).
  • OLED organic light emitting diode
  • the method of dynamically adjusting the backlight source in the existing liquid crystal display is mainly aimed at the direct-type backlight module.
  • the light source generally includes several LED (light emitting diode) light source arrays arranged in each other, the LED backlight array can be controlled by time and zone. Brightness to achieve dynamic backlighting.
  • the LED light sources are easily interfered with each other, the dynamic adjustment capability of the backlight area is weakened, thereby reducing the dynamic contrast of the liquid crystal display. In particular, this method is not suitable for edge-type backlight modules.
  • the present application provides a liquid crystal display that can effectively dynamically adjust the backlight source to solve the problem of the existing liquid crystal display.
  • the LED light sources easily interfere with each other, which makes the backlight area dynamic
  • the adjustment ability is weakened, thereby reducing the technical problem of the dynamic contrast of the liquid crystal display.
  • the application provides a liquid crystal display, including a backlight module, a liquid crystal display panel, and a dynamic backlight shading plate located between the backlight module and the liquid crystal display panel.
  • the dynamic backlight shading plate contains a reflective electroluminescent material .
  • the dynamic backlight shading plate includes an electrochromic module and an electrochromic control module, and the electrochromic module includes a plurality of independently controllable electrochromic units.
  • the electrochromic unit includes a first glass substrate, a first conductive layer, a second conductive layer, and a second glass substrate arranged from bottom to top, and is located in the first glass substrate.
  • the two ends of the edge between the conductive layer and the second conductive layer are respectively provided with spacers.
  • the first conductive layer, the second conductive layer and the spacers enclose a region D.
  • a counter electrode layer, an electrolyte, and an electrochromic layer are stacked from bottom to top.
  • a TFT is provided on the first glass substrate.
  • the materials of the first conductive layer and the second conductive layer are both transparent conductive oxide films.
  • the electrolyte includes at least silver nitrate and copper chloride.
  • the electrochromic layer is a silver nanoparticle electrochromic film.
  • the grain size of the silver nanoparticles in the silver nanoparticle electrochromic film is in the range of 10-100 nanometers.
  • the backlight module is a direct type backlight module or an edge type backlight module.
  • the direct-lit backlight module includes: a back plate, a plurality of light source structures arranged in an array arranged on the back plate, and arranged on each side of the back plate Side reflector on the side.
  • the application also provides a liquid crystal display, including a backlight module, a liquid crystal display panel, and a dynamic backlight shading plate located between the backlight module and the liquid crystal display panel.
  • the dynamic backlight shading plate includes a reflective Electroluminescent material; the dynamic backlight shading plate includes an electrochromic module and an electrochromic control module, the electrochromic module includes a plurality of independently controllable electrochromic units.
  • the electrochromic unit includes a first glass substrate, a first conductive layer, a second conductive layer, and a second glass substrate arranged from bottom to top, and is located in the first glass substrate.
  • the two ends of the edge between the conductive layer and the second conductive layer are respectively provided with spacers.
  • the first conductive layer, the second conductive layer and the spacers enclose a region D.
  • a counter electrode layer, an electrolyte, and an electrochromic layer are stacked from bottom to top.
  • a TFT is provided on the first glass substrate.
  • the materials of the first conductive layer and the second conductive layer are both transparent conductive oxide films.
  • the electrolyte includes at least silver nitrate and copper chloride.
  • the electrochromic layer is a silver nanoparticle electrochromic film.
  • the grain size of the silver nanoparticles in the silver nanoparticle electrochromic film is in the range of 10-100 nanometers.
  • the backlight module is a direct type backlight module or an edge type backlight module.
  • the direct-lit backlight module includes: a back plate, a plurality of light source structures arranged in an array arranged on the back plate, and arranged on each side of the back plate Side reflector on the side.
  • a dynamic backlight shading plate containing reflective electroluminescent material is arranged between the liquid crystal display panel and the backlight module, which further improves the dynamic contrast and the backlight The utilization rate of the module light source.
  • FIG. 1 is a schematic diagram of the structure of a liquid crystal display of this application.
  • FIG. 2 is a schematic diagram of the principle of dynamic adjustment of the backlight source of the liquid crystal display of the present application.
  • FIG. 3 is a schematic diagram of the structure of the electrochromic unit in the liquid crystal display of this application.
  • This application aims at the technical problem of the existing liquid crystal display when dynamically adjusting the backlight source, because each LED light source easily interferes with each other, so that the dynamic adjustment capability of the backlight area is weakened, thereby reducing the dynamic contrast of the liquid crystal display. Examples can solve this defect.
  • the liquid crystal display of the present application includes a backlight module 10, a liquid crystal display panel 30, and a dynamic backlight shading plate 20 located between the backlight module 10 and the liquid crystal display panel 30.
  • the dynamic backlight shading plate 20 includes a reflective Type electroluminescent materials.
  • the reflective electroluminescent material refers to a phenomenon in which the optical properties of the material undergo stable and reversible changes under the action of an external electric field, and it appears as a reversible change in color and transparency in appearance.
  • the color change mechanism of the reflective electroluminescent material is that an oxidation-reduction reaction occurs under electric drive, and the transmittance is controlled and adjusted mainly through the absorption of light.
  • the utilization efficiency of backlight is not high due to the absorption of light, and the effect of improving dynamic contrast is not obvious.
  • the dynamic backlight shading plate 20 includes an electrochromic module 21 and an electrochromic control module 22.
  • the electrochromic module 21 includes a plurality of independently controllable electrochromic units 211; the electrochromic control The module 22 analyzes the brightness information of different areas of the display screen of the liquid crystal display panel 30 in real time, and adjusts the light transmittance of the electrochromic unit 211 in the corresponding area in real time according to the brightness information to realize dynamic backlight and improve contrast.
  • the backlight module 10 is a direct-type backlight module or an edge-type backlight module; the direct-type backlight module 10 includes a back plate, and a plurality of arrays arranged on the back plate are arranged The light source structure and the side reflection sheets arranged on each side of the back plate.
  • FIG. 2 it is a schematic diagram of the principle of dynamic adjustment of the backlight source of the liquid crystal display of this application.
  • the display area of the liquid crystal display panel 30 includes a gray and dark area and a light and dark area.
  • the electrochromic control module 22 in the dynamic backlight shading plate 20 controls the electrochromic module 21 in the electrochromic module 21.
  • the color-changing unit 211 applies a certain voltage to reduce the backlight transmittance of the part of the dynamic backlight shading plate 20 corresponding to the gray area, and the dynamic backlight shading plate 20 passes the part of the light that cannot be transmitted through the backlight module.
  • the group 10 is reflected and collected by the reflector of the backlight module 10 and then further reflected.
  • the brightness of the bright area can be enhanced, the dynamic contrast can be further improved, and the utilization rate of the light source of the backlight module 10 can be improved.
  • the electrochromic unit includes a first glass substrate 401, a first conductive layer 402, a second conductive layer 403, and a second glass substrate 404 arranged from bottom to top, and are located between the first conductive layer 402 and the Spacers 405 are respectively provided at both ends of the edge between the second conductive layer 403.
  • the first conductive layer 402, the second conductive layer 403, and the spacer 405 enclose a region D.
  • a counter electrode layer 406, an electrolyte 407, and an electrochromic layer 408 are stacked from bottom to top.
  • a TFT thin film transistor
  • the materials of the first conductive layer 402 and the second conductive layer 403 are both transparent conductive oxide films.
  • the electrolyte 407 includes at least silver nitrate and copper chloride.
  • the electrochromic layer 408 is a silver nano-particle electrochromic film; the silver nano-particles in the silver nano-particle electrochromic film have a grain size range of 10-100 nanometers.
  • the electrochromic layer 408 When a certain area of the liquid crystal display panel is displayed as a dark picture, under voltage control, the electrochromic layer 408 will have a local surface plasmon resonance electrochromic effect, and its transmittance will be controllably reduced. Reduce the backlight transmittance in the dark area; in particular, the light that is not transmitted is mainly reflected, and can be collected by the reflector of the backlight module and then further reflected. On the one hand, it can enhance the brightness of the bright image area and further improve Dynamic contrast can improve the utilization of the light source of the backlight module.
  • the electrochromic layer 408 When a certain area of the liquid crystal display panel is displayed as a pure black image under extreme conditions, the electrochromic layer 408 will form a mirror to reflect substantially all the backlight at this place, forming a very high contrast.
  • the liquid crystal display provided by the present application can dynamically adjust the backlight when displaying images with different brightness and darkness.
  • the brightness of the bright area can be enhanced, the dynamic contrast can be further improved, and the utilization rate of the light source of the backlight module can be improved.
  • a dynamic backlight shading plate containing reflective electroluminescent material is arranged between the liquid crystal display panel and the backlight module, which further improves the dynamic contrast and the backlight The utilization rate of the module light source.

Landscapes

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

Abstract

L'invention concerne un affichage à cristaux liquides, comprenant un module de rétroéclairage (10), un écran d'affichage à cristaux liquides (30), et une plaque de protection contre la lumière de rétroéclairage dynamique (20) situé entre le module de rétroéclairage (10) et l'écran d'affichage à cristaux liquides (30), la plaque de protection contre la lumière de rétroéclairage dynamique (20) comprenant un matériau électroluminescent réfléchissant. L'affichage à cristaux liquides a les effets bénéfiques de la plaque de protection contre la lumière de rétroéclairage dynamique (20) comprenant un matériau électroluminescent réfléchissant disposé entre l'écran d'affichage à cristaux liquides (30) et le module de rétroéclairage (10), c'est-à-dire améliorant davantage le rapport de contraste dynamique, et améliorant en outre le taux d'utilisation d'une source de lumière du module de rétroéclairage (10).
PCT/CN2019/106994 2019-05-14 2019-09-20 Affichage à cristaux liquides WO2020228214A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910397382.9 2019-05-14
CN201910397382.9A CN110208980A (zh) 2019-05-14 2019-05-14 液晶显示器

Publications (1)

Publication Number Publication Date
WO2020228214A1 true WO2020228214A1 (fr) 2020-11-19

Family

ID=67787130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/106994 WO2020228214A1 (fr) 2019-05-14 2019-09-20 Affichage à cristaux liquides

Country Status (2)

Country Link
CN (1) CN110208980A (fr)
WO (1) WO2020228214A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110208980A (zh) * 2019-05-14 2019-09-06 深圳市华星光电技术有限公司 液晶显示器
CN110908207A (zh) * 2019-11-11 2020-03-24 深圳市华星光电半导体显示技术有限公司 一种显示装置及其显示方法
CN112991966B (zh) * 2020-04-26 2022-11-29 重庆康佳光电技术研究院有限公司 一种显示背板、显示装置和显示背板制作方法
CN114236811A (zh) * 2021-12-20 2022-03-25 北京京东方技术开发有限公司 一种反射型电致变色材料、显示装置、制作及驱动方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000049453A1 (fr) * 1999-02-17 2000-08-24 Central Research Laboratories Limited Affichage a cristaux liquides
CN101211085A (zh) * 2006-12-29 2008-07-02 群康科技(深圳)有限公司 液晶显示装置
CN106125404A (zh) * 2016-09-05 2016-11-16 京东方科技集团股份有限公司 一种背光模组及显示装置
CN107315283A (zh) * 2017-08-17 2017-11-03 京东方科技集团股份有限公司 背光模组、显示装置和调节背光模组出光亮度的方法
CN107340663A (zh) * 2017-08-04 2017-11-10 京东方科技集团股份有限公司 调光器件及其制作方法、背光源组件、显示装置
CN110208980A (zh) * 2019-05-14 2019-09-06 深圳市华星光电技术有限公司 液晶显示器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101445723A (zh) * 2007-11-27 2009-06-03 华东师范大学 新型的纳米复合电致变色材料、器件及其制备方法
CN100578333C (zh) * 2008-01-09 2010-01-06 上海广电光电子有限公司 液晶显示系统及其驱动方法
CN104487890B (zh) * 2012-07-23 2018-04-27 株式会社理光 电致变色装置和用于制造电致变色装置的方法
CN103744246B (zh) * 2014-01-01 2017-02-15 电子科技大学 一种镜面反射型电致变色器件及其制备方法
CN106479478B (zh) * 2015-08-24 2018-10-02 北京大学 一种基于金属纳米粒子的电致变色材料及器件
CN105807526A (zh) * 2016-04-18 2016-07-27 京东方科技集团股份有限公司 可在显示态和镜面态之间相互切换的显示装置
JP2018132635A (ja) * 2017-02-15 2018-08-23 株式会社リコー エレクトロクロミック装置及びエレクトロクロミック装置の製造方法
CN107217959B (zh) * 2017-06-05 2019-01-18 哈尔滨工业大学 一种智能动态颜色可调节Low-E玻璃
CN108594528A (zh) * 2018-04-28 2018-09-28 合肥京东方视讯科技有限公司 一种直下式背光模组、显示装置及其制作方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000049453A1 (fr) * 1999-02-17 2000-08-24 Central Research Laboratories Limited Affichage a cristaux liquides
CN101211085A (zh) * 2006-12-29 2008-07-02 群康科技(深圳)有限公司 液晶显示装置
CN106125404A (zh) * 2016-09-05 2016-11-16 京东方科技集团股份有限公司 一种背光模组及显示装置
CN107340663A (zh) * 2017-08-04 2017-11-10 京东方科技集团股份有限公司 调光器件及其制作方法、背光源组件、显示装置
CN107315283A (zh) * 2017-08-17 2017-11-03 京东方科技集团股份有限公司 背光模组、显示装置和调节背光模组出光亮度的方法
CN110208980A (zh) * 2019-05-14 2019-09-06 深圳市华星光电技术有限公司 液晶显示器

Also Published As

Publication number Publication date
CN110208980A (zh) 2019-09-06

Similar Documents

Publication Publication Date Title
WO2020228214A1 (fr) Affichage à cristaux liquides
WO2019127756A1 (fr) Module de rétro-éclairage et dispositif d'affichage à cristaux liquides
JP6741473B2 (ja) 表示装置およびその駆動方法
US8624810B2 (en) Liquid crystal display to which infrared rays source is applied and multi-touch system using the same
US20200064698A1 (en) Reflective lcd panel
US9256100B2 (en) Transflective liquid crystal display device
US8610845B2 (en) Display device having color filter and polymer-dispersed liquid crystal (PDLC) layer
US10754180B2 (en) Display device
US10859864B2 (en) Display device
CN106646987A (zh) 一种透明显示器
CN110488520A (zh) 侧入式导光板、背光模组及显示装置
US20220350210A1 (en) Display panel and display device
CN110824802A (zh) 显示面板及显示装置
WO2020155452A1 (fr) Dispositif d'affichage de forme spéciale
KR100983731B1 (ko) 액정표시소자 및 그 구동방법
KR100662788B1 (ko) 고휘도 액정표시장치
WO2020062489A1 (fr) Module d'affichage à cristaux liquides, écran à cristaux liquides et dispositif d'affichage
US20200251065A1 (en) Display panel and display device
KR101361938B1 (ko) 표시 장치
WO2019134193A1 (fr) Panneau d'affichage à faible consommation d'énergie et module d'affichage
US20210124192A1 (en) Display panel and display device
KR100438967B1 (ko) 액정표시장치
JP2005010323A (ja) 映像表示装置
WO2020224094A1 (fr) Écran d'affichage à cristaux liquides transflectif et appareil d'affichage à cristaux liquides transflectif
JPWO2003069399A1 (ja) 液晶表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19929052

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19929052

Country of ref document: EP

Kind code of ref document: A1