WO2014190692A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2014190692A1
WO2014190692A1 PCT/CN2013/087685 CN2013087685W WO2014190692A1 WO 2014190692 A1 WO2014190692 A1 WO 2014190692A1 CN 2013087685 W CN2013087685 W CN 2013087685W WO 2014190692 A1 WO2014190692 A1 WO 2014190692A1
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WO
WIPO (PCT)
Prior art keywords
electrochromic
display device
unit
panel
light
Prior art date
Application number
PCT/CN2013/087685
Other languages
English (en)
French (fr)
Inventor
贾倩
谷新
Original Assignee
京东方科技集团股份有限公司
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 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/357,422 priority Critical patent/US20150221283A1/en
Publication of WO2014190692A1 publication Critical patent/WO2014190692A1/zh

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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 
    • G02F1/15—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 an electrochromic effect
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G02F1/13318—Circuits comprising a photodetector
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/58—Arrangements comprising a monitoring photodetector
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background

Definitions

  • Embodiments of the invention relate to a display device. Background technique
  • display devices there are two main types of display devices, one is a liquid crystal display device, and the other is an OLED (Organic Light-Emitting Diode) display device. Most of these display devices are used in mobile phones, tablet computers, and the like. In multimedia products such as digital cameras. Due to the portability of these multimedia products, users often need to bring these products to the outdoors.
  • OLED Organic Light-Emitting Diode
  • a display device of a transflective type and a display device provided with a polarizer and a quarter-wave plate are present in the display device.
  • the transflective display device has good outdoor readability, but its readability is reduced compared to the transmissive type due to its low brightness and low contrast.
  • a display device provided with a polarizer and a quarter-wave plate absorbs light emitted from the display device when the polarizer plus a quarter-wave plate is indoors, and the readability in the room is also lowered.
  • it is necessary to increase the brightness of the display device which reduces the life of the display device and causes an afterimage. Summary of the invention
  • a display device includes: a display panel; an electrochromic panel disposed on the display panel.
  • the electrochromic panel includes an electrochromic unit.
  • the electrochromic unit covers the entire display area of the display panel, and the electrochromic unit is in a transparent light guiding state when the illuminance of the surrounding environment is less than or equal to a preset value, and the illuminance in the surrounding environment is greater than the pre- When the value is set, it is in the colored absorbance state.
  • the display device further includes: a light detecting unit and a voltage control unit.
  • the illumination detecting unit is configured to detect the illuminance of the surrounding environment, convert the detected illuminance of the surrounding environment into a signal, and send the signal to the voltage control unit.
  • the voltage control unit is configured to The received signal adjusts a driving voltage on the electrochromic cell such that the electrochromic cell is in a transparent light guiding state or a colored light absorbing state.
  • the electrochromic unit includes: a first transparent conductive layer, an electrochromic layer, an ion conductive layer, an ion storage layer, and a second transparent conductive layer.
  • the electrochromic unit includes: a first electrode layer, an electrochromic layer, and a second electrode layer.
  • the driving voltage on the electrochromic cell is a preset voltage, in a transparent light guiding state, when the driving voltage on the electrochromic cell is 0, it is in a colored light absorption state; or, the electrochromic state
  • the driving voltage on the cell is a preset voltage, it is in a colored light absorption state, and when the driving voltage on the electrochromic cell is 0, it is in a transparent light guiding state.
  • the preset voltage is 1-5V.
  • the material of the electrochromic layer includes polythiamidine and its derivatives, and viologen.
  • the preset value is between lOOOOlux and 20001ux.
  • the display device further includes: a touch control panel, the touch control panel being disposed between the display panel and the electrochromic panel.
  • the illumination detecting unit and the voltage control unit are integrated inside an integrated circuit board IC chip on the electrochromic panel.
  • the display panel is a liquid crystal display panel or an OLED display panel.
  • FIG. 1 is a cross-sectional structural view of a display device according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of another display device according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional structural view of another display device according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a light line of a display device in a low light state according to an embodiment of the present invention.
  • Embodiments of the present invention provide a display device.
  • the display device mainly includes a display module and an electrochromic panel.
  • the display module is the display panel 11, and the electrochromic panel includes an electrochromic unit 12.
  • the electrochromic unit 12 covers the entire display area of the display panel 11, and the electrochromic unit 12 is in a transparent light guiding state when the illuminance of the surrounding environment is less than or equal to a preset value, in the surrounding environment. When the illuminance is greater than the preset value, it is in the colored absorbance state.
  • the display panel 11 may be a liquid crystal display panel or an OLED display panel, which is not limited herein.
  • the electrochromic unit is too bright in the surrounding environment (for example, outdoor) When it is in the state of colored light absorption, it can absorb ambient light and reduce the transmittance of ambient light, thus reducing the degree of reflection of ambient light, thereby improving the outdoor readability of the display device; meanwhile, the electrochromic panel
  • the transparent light guiding state when the surrounding environment is not bright (for example, indoor) does not affect the indoor readability of the display device.
  • the indoor or outdoor environment described in the embodiment of the present invention is only a general identifier of the weak ambient light, and whether the electrochromic unit is transparent or colored is determined according to the size of the illuminance.
  • the electrochromic unit is in a transparent light guiding state, and when the illuminance of the surrounding environment is greater than a preset value, the electrochromic unit is in a colored light absorbing state.
  • the preset value is between lOOOOlux and 20001ux.
  • the preset value may be 15001 ux, when the ambient illuminance is less than or equal to 15001 ux, the electrochromic unit 12 is in a transparent light guiding state, and when the ambient illuminance is greater than15001 ux, the electrochromic unit 12 is in a colored absorbance state.
  • the display device may further include: a light detecting unit 13 and a voltage control unit 14.
  • the illumination detecting unit 13 is configured to detect the illuminance of the surrounding environment, convert the illuminance of the detected surrounding environment into a signal, and send the signal to the voltage control unit 14.
  • the voltage The control unit 14 is configured to adjust a driving voltage on the electrochromic unit 12 according to the received signal, so that the electrochromic unit 12 is in a transparent light guiding state or a colored light absorption state.
  • the electrochromic unit 12 includes: a first transparent conductive layer 121, an electrochromic layer 122, an ion conductive layer 123, an ion storage layer 124, and a second transparent conductive layer 125.
  • the electrochromic unit includes: a first electrode layer 131, an electrochromic layer 132, and a second electrode layer 133.
  • the illumination detecting unit 13 may be composed of a photosensitive member such as a photoresistor.
  • the photoresistor can convert the illuminance in the surrounding environment into an electrical signal, and the illumination detecting unit can send the electrical signal to the voltage control unit, and the voltage control unit can adjust the electrochromic unit according to the received electrical signal.
  • Drive voltage Since the electrical signal corresponds to the illuminance of the surrounding environment, the voltage control unit adjusts the driving voltage on the electrochromic unit according to the electrical signal, that is, correspondingly adjusts the driving voltage on the electrochromic unit according to the illuminance of the surrounding environment.
  • the voltage control unit loads a driving voltage on the first transparent conductive layer and the second transparent conductive layer
  • the voltage control The unit loads a driving voltage on the first electrode layer and the second electrode layer.
  • the electrochromic layer can be made transparent or colored by loading different driving voltages on the electrochromic cell.
  • the material of the electrochromic layer may be polythiamidine and its derivatives, viologen and the like.
  • the materials of the electrochromic layers can be divided into two types.
  • the material of the first electrochromic layer is in a transparent light guiding state when the driving voltage on the electrochromic unit is a preset voltage.
  • the driving voltage on the color changing unit is 0, it is in a colored light absorption state; and the material of the second electrochromic layer is exactly opposite, when the driving voltage on the electrochromic unit is a preset voltage, the colored light is absorbed.
  • the voltage control unit adjusts the driving voltage on the electrochromic cell differently.
  • the voltage control unit loads a preset voltage on the electrochromic unit to make the electrochromic layer In a transparent light guiding state, when the illuminance of the surrounding environment is large, the voltage control unit does not apply a voltage on the electrochromic unit, so that the electrochromic layer is in a colored light absorbing state.
  • the voltage control unit when the illuminance of the surrounding environment is small, the voltage control unit does not apply a voltage on the electrochromic unit, so that the electrochromic layer is at In the transparent light guiding state, when the illuminance of the surrounding environment is large, the voltage control unit loads a preset voltage on the electrochromic unit, so that the electrochromic layer is in a colored light absorption state.
  • the preset voltage is 1-5V.
  • the display device further includes: a touch control panel disposed between the display panel and the electrochromic unit for implementing a touch operation.
  • the illumination detecting unit and the voltage control unit described in the embodiments of the present invention may be integrated inside an IC (Integrated Circuit) chip on the electrochromic panel.
  • the IC chip of the electrochromic panel is separate from the IC chip of the display panel.
  • the embodiment of the invention also provides a method for preparing the electrochromic unit shown in FIG.
  • the method can include the following steps:
  • a transparent conductive film is formed on two transparent substrates to form two substrates.
  • the material of the transparent conductive film may be an inorganic conductive material such as ITO or an organic conductive material such as PEDOT (polyethylene dioxythiophene).
  • the transparent substrate is a glass substrate.
  • the deposition method is electrochemical deposition.
  • the electrochromic unit shown in FIG. 3 is formed, wherein the two substrates with the transparent conductive film are the first electrode layer 131 and the second electrode layer 133, and the electrochromic layer 132 is at the two electrodes. Between the layers.
  • the method may further include the following steps:
  • the material of the transparent conductive film may be an inorganic conductive material such as ITO or an organic conductive material such as PEDOT.
  • the transparent substrate is a glass substrate.
  • the deposition method is electrochemical deposition.
  • step Q3 After the substrate of step Q2 is completed and the other substrate is paired with the substrate, the plastic film and the transparent substrate are separated. This has formed the electrochromic unit shown in Figure 3 with a transparent conductive thin The plastic film of the film is the first electrode layer 131 and the second electrode layer 133, and the electrochromic layer 132 is between the two electrode layers.
  • an IC chip integrated with the light detecting unit and the voltage control unit is bonded to the electrochromic cell to form an electrochromic panel.
  • the electrochromic panel can be fabricated on a display panel by lamination or the like to form a display device provided by an embodiment of the present invention.
  • the light line condition of the display device according to the embodiment of the present invention is strong as the outdoor light is strong.
  • the ambient light 41 can be absorbed by the electrochromic unit on the display device, and the transmittance is low, and the degree of reflection is also The reflected light is negligible relative to the light 42 emitted by the display device, which results in good outdoor readability of the display device.
  • the light line condition of the display device according to the embodiment of the present invention is as shown in FIG. 5, the ambient light is negligible, and the electrochromic unit 12 is in a transparent light guiding state and does not absorb the display device. The emitted light is 50, and the indoor readability is also good.
  • the display device provided by the embodiment of the invention can be applied to any product or component having a display function such as a digital camera, a mobile phone, a tablet computer or an electronic paper.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种显示装置包括：显示面板（11）；设置在显示面板（11）上的电致变色面板，电致变色面板包括电致变色单元（12）；电致变色单元（12）覆盖显示面板（11）的整个显示区域，且电致变色单元（12）在周围环境的光照度小于等于预设值时，处于透明导光状态，在周围环境的光照度大于预设值时，处于着色吸光状态。

Description

显示装置 技术领域
本发明的实施例涉及一种显示装置。 背景技术
目前， 显示装置主要有两大类， 一类是液晶显示装置， 一类是 OLED ( Organic Light-Emitting Diode, 有机电致发光二极管）显示装置， 这些显示 装置大多被应用在如手机、 平板电脑、 数码相机等的多媒体产品中。 由于这 些多媒体产品的便携性， 用户经常需要把这些产品带到户外使用。
当用户在户外使用这些带有显示装置的产品时， 户外的太阳光会在显示 装置的表面产生反射， 使用户难以看清显示装置上显示的图像。 为了改善显 示装置的户外可读性， 显示装置中出现了半反半透型的显示装置， 和设置有 偏光片加四分之一波片的显示装置。
半反半透型的显示装置虽然拥有良好的户外可读性， 但和透射型相比由 于其低亮度和低对比度使其室内的可读性会降低。 设置有偏光片加四分之一 波片的显示装置由于在室内时偏光片加四分之一波片会吸收显示装置发出的 光， 其室内的可读性也会降低。 为了提高显示装置的室内可读性， 就需要提 高显示装置的亮度， 这样就会减小显示装置的寿命并导致残像。 发明内容
根据本发明的一个方面， 提供一种显示装置。 该显示装置包括： 显示面 板； 设置在所述显示面板上的电致变色面板。 所述电致变色面板包括电致变 色单元。 所述电致变色单元覆盖所述显示面板的整个显示区域， 且所述电致 变色单元在周围环境的光照度小于等于预设值时， 处于透明导光状态， 在所 述周围环境的光照度大于预设值时， 处于着色吸光状态。
例如， 所述显示装置还包括： 光照探测单元和电压控制单元。 所述光照 探测单元， 用于探测周围环境的光照度， 将探测到的周围环境的光照度转换 为信号并将该信号发送给所述电压控制单元。 所述电压控制单元， 用于根据 接收到的信号调整所述电致变色单元上的驱动电压， 以使所述电致变色单元 处于透明导光状态或着色吸光状态。
例如， 所述电致变色单元包括： 第一透明导电层、 电致变色层、 离子导 电层、 离子储存层和第二透明导电层。
例如， 所述电致变色单元包括： 第一电极层、 电致变色层和第二电极层。 例如， 所述电致变色单元上的驱动电压为预设电压时， 处于透明导光状 态， 所述电致变色单元上的驱动电压为 0时， 处于着色吸光状态； 或者， 所 述电致变色单元上的驱动电压为预设电压时， 处于着色吸光状态， 所述电致 变色单元上的驱动电压为 0时， 处于透明导光状态。
例如， 所述预设电压为 1-5V。
例如， 所述电致变色层的材料包括聚噻喻及其衍生物、 紫罗精。
例如， 所述预设值的取值在 lOOOlux至 20001ux之间。
例如， 所述显示装置还包括： 触摸控制面板， 所述触摸控制面板设置在 所述显示面板和所述电致变色面板之间。
例如， 所述光照探测单元和所述电压控制单元集成在所述电致变色面板 上的集成电路板 IC芯片内部。
例如， 中所述显示面板为液晶显示面板或 OLED显示面板。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为本发明实施例提供的一种显示装置的剖面结构示意图；
图 2为本发明实施例提供的另一种显示装置的剖面结构示意图； 图 3为本发明实施例提供的再一种显示装置的剖面结构示意图； 图 4为本发明实施例提供的显示装置在强光状态下的光线线路示意图； 以及
图 5为本发明实施例提供的显示装置在弱光状态下的光线线路示意图。 具体实施方式 为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合附图， 对本发明实施例的技术方案进行清楚、 完整地描述。 显然， 所描述的实施例 是本发明的一部分实施例， 而不是全部的实施例。 基于所描述的本发明的实 施例， 本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实 施例， 都属于本发明保护的范围。
本发明实施例提供了一种显示装置。 如图 1所示， 所述显示装置主要包 括显示模块和电致变色面板。 所述显示模块即为显示面板 11 , 所述电致变色 面板包括电致变色单元 12。所述电致变色单元 12覆盖所述显示面板 11的整 个显示区域， 且所述电致变色单元 12在周围环境的光照度小于等于预设值 时， 处于透明导光状态， 在所述周围环境的光照度大于预设值时， 处于着色 吸光状态。
例如， 所述显示面板 11既可以是液晶显示面板， 也可以是 OLED显示 面板， 在此并不作限制。
在本发明实施例提供的显示装置中， 通过在所述显示装置的显示面板上 设置一个包含有电致变色单元的电致变色面板， 所述电致变色单元在周围环 境太亮 （例如， 户外） 时处于着色吸光状态， 可以吸收环境光， 降^ 了环境 光的透过率， 这样就降低了环境光的反射程度， 从而提高了显示装置的户外 可读性； 同时， 所述电致变色面板在周围环境不是 ^艮亮 （例如， 室内） 时处 于透明导光状态， 并不影响显示装置的室内可读性。
在这里需要说明的是， 本发明实施例中所述的室内或户外只是环境光强 弱的大概标识， 电致变色单元是透明还是着色都是根据光照度的大小来决定 的。周围环境的光照度小于等于预设值时， 电致变色单元处于透明导光状态， 在所述周围环境的光照度大于预设值时， 电致变色单元处于着色吸光状态。 例如， 所述预设值的取值在 lOOOlux至 20001ux之间。 示例的， 所述预设值 可以为 15001ux, 当所述环境光照度小于等于 15001ux时， 所述电致变色单元 12处于透明导光状态， 当所述环境光照度大于 15001ux时， 所述电致变色单 元 12处于着色吸光状态。
如图 2所示，所述显示装置还可以包括： 光照探测单元 13和电压控制单 元 14。 所述光照探测单元 13用于探测周围环境的光照度， 将探测到的周围 环境的光照度转换为信号并将该信号发送给所述电压控制单元 14。所述电压 控制单元 14, 用于根据接收到的信号调整所述电致变色单元 12上的驱动电 压， 以使所述电致变色单元 12处于透明导光状态或着色吸光状态。
例如， 如图 2所示， 所述电致变色单元 12包括： 第一透明导电层 121、 电致变色层 122、 离子导电层 123、 离子储存层 124和第二透明导电层 125。 备选的， 如图 3所示， 所述电致变色单元包括： 第一电极层 131、 电致变色 层 132和第二电极层 133。
例如，所述光照探测单元 13可以由光敏元器件如光敏电阻组成。光敏电 阻可以将周围环境中的光照度转换为电信号， 所述光照探测单元可以将该电 信号发送给电压控制单元， 所述电压控制单元可以根据接收到的电信号调整 所述电致变色单元上的驱动电压。 由于电信号对应于周围环境的光照度， 所 以所述电压控制单元根据电信号调整所述电致变色单元上的驱动电压， 就是 对应的根据周围环境的光照度调整所述电致变色单元上的驱动电压。 在如图
2所示的电致变色单元中， 所述电压控制单元将驱动电压加载在第一透明导 电层和第二透明导电层上， 在如图 3所示的电致变色单元中， 所述电压控制 单元将驱动电压加载在第一电极层和第二电极层上。 在电致变色单元上加载 不同的驱动电压， 可以使电致变色层透明或着色。
例如， 所述电致变色层的材料可以是聚噻喻及其衍生物、 紫罗精等。 这 些电致变色层的材料可以分为两种， 第一种电致变色层的材料是在所述电致 变色单元上的驱动电压为预设电压时， 处于透明导光状态， 在所述电致变色 单元上的驱动电压为 0时， 处于着色吸光状态； 而第二种电致变色层的材料 正好相反， 是在所述电致变色单元上的驱动电压为预设电压时， 处于着色吸 光状态， 在所述电致变色单元上的驱动电压为 0时， 处于透明导光状态。 因 此， 根据所述电致变色层的材料的不同， 所述电压控制单元对所述电致变色 单元上的驱动电压的调整方法也不同。
例如， 若所述电致变色层的材料是第一种时， 当周围环境的光照度较小 时， 所述电压控制单元在所述电致变色单元上加载预设电压， 使所述电致变 色层处于透明导光状态， 当周围环境的光照度较大时， 所述电压控制单元不 在所述电致变色单元上加载电压， 使所述电致变色层处于着色吸光状态。 例 如， 若所述电致变色层的材料是第二种时， 当周围环境的光照度较小时， 所 述电压控制单元不在所述电致变色单元上加载电压， 使所述电致变色层处于 透明导光状态， 当周围环境的光照度较大时， 所述电压控制单元在所述电致 变色单元上加载预设电压， 使所述电致变色层处于着色吸光状态。
例如， 所述预设电压为 1-5V。
例如， 所述显示装置还包括： 触摸控制面板， 所述触摸控制面板设置在 所述显示面板和所述电致变色单元之间， 用于实现触控操作。
本发明实施例中所述的光照探测单元和电压控制单元可以集成在所述电 致变色面板上的 IC ( Integrated circuit, 集成电路板） 芯片内部。 例如， 所述 电致变色面板的 IC芯片与显示面板的 IC芯片是分开的。
本发明实施例还提供了图 3所示的电致变色单元的制备方法。 例如， 该 方法可以包括以下步骤：
51、 分别在两块透明基板上制作透明导电薄膜， 制成两块基板。 例如， 所述透明导电薄膜的材料可以为无机导电材料如 ITO或者有机导电材料如 PEDOT ( polyethylene dioxythiophene ) 。 例如， 所述透明基板为玻璃基板。
52、 通过沉积方法在其中一块基板上面制备电致发光层。 例如， 所述沉 积方法为电化学沉积。 例如， 还可以通过滴注的方式将电解液滴到电致发光 层上以形成电解质层， 该电解质层可用作离子的传输通道。
53、 将沉积有电致发光层的基板与另一块基板对盒， 然后对透明基板进 行打薄。 至此就形成了图 3中所示的电致变色单元， 其中带有透明导电薄膜 的两块基板即为第一电极层 131和第二电极层 133, 所述电致变色层 132在 两个电极层之间。
例如， 所述方法还可以包括以下步骤：
Ql、 将两块塑料薄膜分别粘在两块透明基板上， 然后在两块塑料薄膜上 面分别制作透明导电薄膜， 制成两块基板。 例如， 所述透明导电薄膜的材料 可以为无机导电材料如 ITO或者有机导电材料如 PEDOT。 例如， 所述透明 基板为玻璃基板。
Q2、 取其中一块基板， 通过沉积方法在其上面制备电致发光层。 例如， 所述沉积方法为电化学沉积。 例如， 还可以通过滴注的方式将电解液滴到电 致发光层上以形成电解质层， 该电解质层可用作离子的传输通道。
Q3、 将完成步骤 Q2的基板与另一块基板对盒后， 将塑料薄膜与透明基 板剥离开。 至此就形成了图 3中所示的电致变色单元， 其中带有透明导电薄 膜的塑料薄膜即为第一电极层 131和第二电极层 133, 所述电致变色层 132 在两个电极层之间。
应用上述方法制作完成电致变色单元后， 将集成有所述光照探测单元和 电压控制单元的 IC芯片接合在电致变色单元上，形成电致变色面板。所述电 致变色面板可以通过贴合等方式制作在显示面板上， 形成本发明实施例提供 的显示装置。
应用本发明实施例提供的显示装置， 可以在不影响显示装置的室内可读 性的情况下， 提高其户外可读性。 在户外光线很强的情况下根据本发明实施 例的显示装置的光线线路情况如图 4所示，周围环境的光线 41可以被显示装 置上的电致变色单元吸收， 透射率低， 反射程度也降低， 反射的光线相对于 所述显示装置发射的光线 42来说可以忽略,这样就会使所述显示装置有很好 的户外可读性。 在室内光线较弱的情况下根据本发明实施例的显示装置的光 线线路情况如图 5 所示， 周围环境的光线可以忽略， 所述电致变色单元 12 处于透明导光状态不会吸收显示装置发射的光线 50, 室内可读性也 4艮好。
本发明实施例提供的显示装置， 可以应用于数码相机、 手机、 平板电脑 或电子纸等任意具有显示功能的产品或者部件。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种显示装置， 包括：
显示面板；
设置在所述显示面板上的电致变色面板， 所述电致变色面板包括电致变 色单元；
其中， 所述电致变色单元覆盖所述显示面板的整个显示区域， 且所述电 致变色单元在周围环境的光照度小于等于预设值时， 处于透明导光状态， 在 所述周围环境的光照度大于预设值时， 处于着色吸光状态。
2、根据权利要求 1所述的显示装置， 其中所述显示装置还包括： 光照探 测单元和电压控制单元；
所述光照探测单元， 用于探测周围环境的光照度， 将探测到的周围环境 的光照度转换为信号并将该信号发送给所述电压控制单元；
所述电压控制单元， 用于根据接收到的信号调整所述电致变色单元上的 驱动电压， 以使所述电致变色单元处于透明导光状态或着色吸光状态。
3、根据权利要求 2所述的显示装置， 其中所述电致变色单元包括： 第一 透明导电层、 电致变色层、 离子导电层、 离子储存层和第二透明导电层。
4、根据权利要求 2所述的显示装置， 其中所述电致变色单元包括： 第一 电极层、 电致变色层和第二电极层。
5、根据权利要求 3或 4所述的显示装置，其中所述电致变色单元上的驱 动电压为预设电压时， 处于透明导光状态， 所述电致变色单元上的驱动电压 为 0时， 处于着色吸光状态； 或者，
所述电致变色单元上的驱动电压为预设电压时， 处于着色吸光状态， 所 述电致变色单元上的驱动电压为 0时， 处于透明导光状态。
6、 根据权利要求 5所述的显示装置， 其中所述预设电压为 1-5V。
7、根据权利要去 5所述的显示装置，其中所述电致变色层的材料包括聚 噻喻及其衍生物、 紫罗精。
8、 根据权利要求 1所述的显示装置， 其中所述预设值的取值在 lOOOlux 至 20001ux之间。
9、 根据权利要求 1所述的显示装置， 其中所述显示装置还包括： 触摸控制面板， 所述触摸控制面板设置在所述显示面板和所述电致变色 面板之间。
10、 根据权利要求 2所述的显示装置， 其中所述光照探测单元和所述电 压控制单元集成在所述电致变色面板上的集成电路板 IC芯片内部。
11、 如权利要求 1所述的显示装置， 其中所述显示面板为液晶显示面板 或 OLED显示面板。
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