WO2019218964A1 - 发光器件及显示装置 - Google Patents

发光器件及显示装置 Download PDF

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Publication number
WO2019218964A1
WO2019218964A1 PCT/CN2019/086628 CN2019086628W WO2019218964A1 WO 2019218964 A1 WO2019218964 A1 WO 2019218964A1 CN 2019086628 W CN2019086628 W CN 2019086628W WO 2019218964 A1 WO2019218964 A1 WO 2019218964A1
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WIPO (PCT)
Prior art keywords
chromaticity
light emitting
emitting device
light
compensated
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PCT/CN2019/086628
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English (en)
French (fr)
Inventor
鲁俊祥
孙茉莉
胡贵光
孙少君
陈霞
乐发垫
Original Assignee
京东方科技集团股份有限公司
福州京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 福州京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/759,091 priority Critical patent/US11562710B2/en
Publication of WO2019218964A1 publication Critical patent/WO2019218964A1/zh

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    • 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
    • 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
    • G02F1/153—Constructional details
    • G02F1/157—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
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    • 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]
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    • G09G3/38—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 by control of light from an independent source using electrochromic devices
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
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Definitions

  • the present disclosure belongs to the field of display technologies, and in particular, to a light emitting device and a display device.
  • the white light OLED can be white light by mixing the red, green and blue light-emitting materials of the three-primary color principle or the blue-yellow material of the complementary color, and each of the light-emitting materials can be separately formed into one light-emitting layer or two. One or more luminescent materials are mixed to form one luminescent layer.
  • the blue light-emitting material due to the short lifetime of the blue light-emitting material, the light energy of the blue light photon is high, which is easy to cause the material to decay. Therefore, as the use time of the OLED device increases, the yellowish color phenomenon may occur, and the white light color cannot be stabilized at a good level. It seriously affects the luminescent properties of white OLEDs and reduces their luminescence lifetime.
  • the present disclosure provides a light emitting device and a display device capable of stably emitting light.
  • the light emitting device includes: a substrate, and a first electrode, a light emitting layer, and a second electrode sequentially disposed on the substrate; wherein the light emitting device further includes an electrochromic substrate disposed on the second electrode a chromaticity tester, a processor, and a driver disposed on a light emitting side of the light emitting device; wherein
  • the chromaticity tester is configured to acquire illuminance chromaticity of the light emitting device
  • the processor is configured to calculate a chromaticity required to be compensated by the illuminating device according to the illuminance chromaticity of the illuminating device acquired by the chromaticity tester; and according to the calculated requirement of the illuminating device The compensated chromaticity, the corresponding electrical signal is calculated;
  • the driver is configured to drive the electrochromic substrate to emit light with the calculated corresponding electrical signal to compensate for the illuminance chromaticity of the light emitting device.
  • the light emitting device further includes a memory; wherein the memory stores a correspondence between a chromaticity of the light emitting device and a chromaticity that needs to be compensated;
  • the processor is configured to: according to a chromaticity of the illuminating device acquired by the chromaticity tester, and a chromaticity of the illuminating chromaticity of the illuminating device in the memory and a chromaticity thereof to be compensated for The relationship is calculated to calculate the chromaticity that the light emitting device needs to compensate.
  • the electrical signal includes a voltage signal
  • the memory further stores a correspondence between a chrominance that the light emitting device needs to compensate and the voltage signal
  • the processor is configured to calculate a corresponding electric quantity according to the calculated chromaticity required for the light emitting device, and a correspondence between the chromaticity required to be compensated by the light emitting device and the voltage signal signal.
  • the first extremely reflective anode the second extremely transmissive cathode; or
  • the first extremely reflective cathode the second extremely transmissive anode.
  • the light emitting device comprises a white light emitting device
  • the electrochromic substrate is a structure that emits blue light when an electrical signal is applied, and is in a transparent state when no electrical signal is applied.
  • the electrochromic layer comprises: a first transparent conductive layer, an electrochromic layer, an electrolyte layer, and a second transparent conductive layer disposed in sequence on the second pole.
  • the material of the electrolyte layer comprises: an all-solid polymer electrolyte, or a gel polymer electrolyte, or a composite material of the two.
  • the material of the electrochromic layer comprises: WO 3 or Prussian white.
  • the colorimeter includes an optical system and a beam splitter; wherein
  • the optical system is configured to acquire light emitted by the light emitting device
  • the beam splitter is configured to perform an analysis and calculation on light emitted by the light emitting device obtained by the optical system to obtain a chromaticity of light emitted by the light emitting device.
  • the display device of the present disclosure includes the above-described light emitting device.
  • FIG. 1 is a schematic structural view of a light emitting device according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a module in a light emitting device according to an embodiment of the present disclosure
  • FIG 3 is a schematic structural view of an electrochromic substrate of a light emitting device according to an embodiment of the present disclosure.
  • the present embodiment provides a light emitting device, which may be an OLED device, including: a substrate 10, and a first pole 1 and a light emitting layer 3 sequentially disposed on the substrate 10. a second pole 2, an electrochromic substrate 4 disposed on the second pole 2; the light emitting device further comprising: a colorimeter, a processor, and a driver; wherein the colorimeter is used to obtain the illumination of the light emitting device Chromaticity; the processor is configured to calculate the chromaticity required to be compensated by the illuminating device according to the illuminance chromaticity of the illuminating device obtained by the chromaticity tester; and calculate the corresponding chromaticity according to the calculated chromaticity of the illuminating device The electrical signal; the electrochromic substrate 4 is used to illuminate the driver with the calculated electrical signal to compensate for the luminescent chromaticity of the illuminating device.
  • the chromaticity of the illuminating device can be detected in real time by the chromaticity tester, and the processor can pass the chromaticity tester.
  • the illuminance of the illuminating device is processed and analyzed to obtain an electrical signal corresponding to the chromaticity to be compensated, and a corresponding electrical signal is applied to the electrochromic substrate 4 through the driver to drive the electrochromic substrate 4 to emit a compensated chromaticity.
  • Light is compensated for the chromaticity of the illuminating device so that the illuminating device stably emits light.
  • the illuminating device of the embodiment further includes a memory, wherein the memory stores a correspondence between the illuminance of the illuminating device and the chromaticity that needs to be compensated; the processor is configured to test according to the chromaticity. Calculating the color to be compensated by the light emitting device by the correspondence between the illuminance chromaticity of the illuminating device and the chromaticity of the illuminating device of the illuminating device and the chromaticity to be compensated in the memory degree.
  • the electrical signal includes a voltage signal
  • the memory further stores a correspondence between the chrominance required to be compensated by the illuminating device and the voltage signal
  • the processor is configured to perform compensation according to the calculated illuminating device The chromaticity, and the correspondence between the chrominance required to be compensated by the illuminating device and the voltage signal, calculates a corresponding electrical signal.
  • the first pole 1 of the light emitting device is a reflective anode; the second pole 2 is a transmissive cathode; wherein the reflective anode may be a reflective electrode such as Ag; the transmitting cathode may be selected from Mg/Ag, etc. Alloy or metal/inorganic composite.
  • the first pole 1 of the light emitting device is a reflective cathode; the second pole 2 is a transmissive anode.
  • the reflective cathode may be made of a reflective metal such as Al 2 O 3 or an oxide thereof; and the transparent anode may be made of ITO.
  • the white light emitting device compensates for the blue light is because the blue light emitting material is more likely to age in the white light emitting device.
  • the electrochromic substrate 4 in this embodiment may include: a first transparent conductive layer sequentially disposed on the second pole 2 of the light emitting device. 41.
  • the material of the first transparent conductive layer 41 and the second transparent conductive layer 42 includes a transparent conductive material such as ITO.
  • the electrolyte layer 44 is an all solid polymer electrolyte, or a gel polymer electrolyte, or a composite of both.
  • the material of the electrochromic layer 43 is WO 3 or Prussian white, wherein when the material of the electrochromic layer 43 is WO 3 , the oxidation state WO 3 is a transparent film, and the reduced state MxWO 3 is blue; when the electrochromic layer When the material of Prussian white is 43, it is a transparent film which, when oxidized, becomes Prussian blue and turns blue.
  • the processor performs an operation process according to the chromaticity coordinates of the white light emitted by the initial and real-time white light emitting device obtained by the chromaticity tester, and analyzes The blue light of the chromaticity needs to be compensated, and the processor further calculates a corresponding electrical signal according to the blue light, and loads the electrical signal to the first transparent conductive layer 41 and the second transparent conductive layer 42 of the electrochromic substrate 4 by using a driver.
  • the electrochromic layer 43 is in a transparent state when no voltage is applied to the electrochromic substrate 4.
  • the chromaticity tester in the embodiment includes an optical system and a beam splitter, wherein the optical system is configured to acquire light emitted by the light emitting device; and the optical splitter is configured to perform light emitted by the light emitting device obtained by the optical system. Analytical calculations are performed to obtain the luminosity of the light-emitting device.
  • the processor calculates a corresponding electrical signal according to the real-time chromaticity of the light-emitting device, and the driver drives the electrochromic substrate 4 with the corresponding electrical signal to make the electrochromic substrate 4 transparent. Turns blue.
  • the chromaticity coordinates of the white light emitting device can be monitored in real time, and real-time compensation can be performed according to the color shift condition to ensure stable white light emitting display and improve the quality and service life of the white light emitting device.
  • the present embodiment provides a display device including the light-emitting device of the above embodiment, so that the display effect is better.
  • the display device of the embodiment may be any product or component having a display function, such as an OLED panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as an OLED panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

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Abstract

一种发光器件及显示装置，属于显示技术领域。发光器件包括：基底(10)，以及依次设置在基底(10)上的第一极(1)、发光层(3)、第二极(2)；在第二极(2)之上设置有电致变色基板(4)；发光器件还包括：色度测试仪、处理器，以及驱动器；其中，色度测试仪，用于获取发光器件的发光色度；处理器，用于根据色度测试仪所获取的发光器件的发光色度，计算出发光器件所需要补偿的色度；并且根据计算出的发光器件所需要补偿的色度，计算出相应的电信号；以及驱动器，用于以所计算出的相应的电信号驱动电致变色基板发光，以对发光器件的发光色度进行补偿。

Description

发光器件及显示装置
相关申请的交叉引用
本申请要求于2018年5月16日提交的中国专利申请No.201810467131.9的优先权，在此将其引用方式整体并入本文。
技术领域
本公开属于显示技术领域，具体涉及一种发光器件及显示装置。
背景技术
OLED由于其自发光、响应快、视角宽、省电、色彩丰富、可实现柔性显示等优势而受到广泛关注，是一种具有巨大潜力的替代TFT-LCD的显示技术。白光OLED，可以通过三基色原理的红绿蓝发光材料或是互补色的蓝黄材料，将其按照一定比例混合，即可产生白光，每种发光材料可以单独构成一个发光层，也可以由两种或多种发光材料混合形成一个发光层。
但是由于蓝光发光材料寿命短，主要由于蓝光光子的能量高，容易引起材料衰变，因此随着OLED器件的使用时间的增加，会出现色偏黄的现象，白光色度不能稳定在一个良好水平，严重影响白光OLED的发光性能，降低其发光寿命。
发明内容
本公开提供一种能够稳定发光的发光器件及显示装置。
所述发光器件包括：基底，以及依次设置在所述基底上的第一极、发光层、第二极；其中，所述发光器件还包括设置在所述第二极之上的电致变色基板、设置在所述发光器件出光侧的色度测试仪、处理器，以及驱动器；其中，
所述色度测试仪，用于获取所述发光器件的发光色度；
所述处理器，用于根据所述色度测试仪所获取的所述发光器 件的发光色度，计算出所述发光器件所需要补偿的色度；并且根据计算出的所述发光器件所需要补偿的色度，计算出相应的电信号；
所述驱动器，用于以所计算出的相应的电信号驱动所述电致变色基板发光，以对所述发光器件的发光色度进行补偿。
可选的是，所述发光器件还包括存储器；其中，所述存储器中存储有所述发光器件的发光色度与其所需要补偿的色度之间的对应关系；
所述处理器，用于根据所述色度测试仪所获取的所述发光器件的发光色度，和所述存储器中所述发光器件的发光色度与其所需要补偿的色度之间的对应关系，计算出所述发光器件所需要补偿的色度。
可选的是，所述电信号包括电压信号；所述存储器还存储有所述发光器件所需要补偿的色度与所述电压信号之间的对应关系；
所述处理器，用于根据所计算出的所述发光器件所需要补偿的色度，和所述发光器件所需要补偿的色度与所述电压信号之间的对应关系，计算出相应的电信号。
可选的是，所述第一极为反射阳极；所述第二极为透射阴极；或者，
所述第一极为反射阴极；所述第二极为透射阳极。
可选的是，所述发光器件包括白光发光器件；所述电致变色基板为在施加电信号时发出蓝光，在未施加电信号时呈透明状态的结构。
可选的是，所述电致变色层包括：依次设置在所述第二极之上的第一透明导电层、电致变色层、电解质层、第二透明导电层。
可选的是，所述电解质层的材料包括：全固态聚合物电解质，或凝胶聚合物电解质，或两者复合材料。
可选的是，所述电致变色层的材料包括：WO 3或普鲁士白。
可选的是，所述色度测试仪包括光学系统和分光器；其中，
所述光学系统，用于获取所述发光器件所发出的光；
所述分光器，用于对所述光学系统所获取的所述发光器件所发出的光进行分析计算，得到所述发光器件的发光色度。
本公开的显示装置包括上述的发光器件。
附图说明
图1为本公开的实施例的发光器件的结构示意图；
图2为本公开的实施例的发光器件中的模块示意图；
图3为本公开的实施例的发光器件的电致变色基板的结构示意图。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施方式对本公开作进一步详细描述。
实施例1：
结合图1和2所示，本实施例提供一种发光器件，该发光器件可以为OLED器件，其包括：基底10，以及依次设置在所述基底10上的第一极1、发光层3、第二极2，设置在第二极2之上的电致变色基板4；该发光器件还包括：色度测试仪、处理器，以及驱动器；其中，色度测试仪用于获取发光器件的发光色度；处理器用于根据色度测试仪所获取的发光器件的发光色度，计算出发光器件所需要补偿的色度；并且根据计算出的发光器件所需要补偿的色度，计算出相应的电信号；电致变色基板4用于在驱动器以所计算出的电信号的驱动下发光，以对发光器件的发光色度进行补偿。
由于在本实施例的发光器件中增加了色度测试仪、处理器，以及驱动器，因此，可以通过色度测试仪对发光器件的发光色度进行实时检测，处理器可以通过色度测试仪对发光器件的发光色度进行处理分析，得到所需要补偿的色度所对应的电信号，并通 过驱动器向电致变色基板4施加相应的电信号，以驱动电致变色基板4发出补偿色度的光，以对发光器件的发光色度进行补偿，以使发光器件稳定发光。
其中，本实施例中的发光器件中还包括存储器，其中，存储器中存储有所述发光器件的发光色度与其所需要补偿的色度之间的对应关系；处理器用于根据所述色度测试仪所获取的所述发光器件的发光色度，和所述存储器中所述发光器件的发光色度与其所需要补偿的色度之间的对应关系，计算出所述发光器件所需要补偿的色度。
其中，上述的电信号包括电压信号；存储器还存储有所述发光器件所需要补偿的色度与所述电压信号之间的对应关系；处理器用于根据计算出的所述发光器件所需要补偿的色度，和所述发光器件所需要补偿的色度与所述电压信号之间的对应关系，计算出相应的电信号。
其中，在本实施例中，发光器件的第一极1为反射阳极；第二极2为透射阴极；其中，反射阳极可选用具有反射性的电极，如Ag；透射阴极可选用Mg/Ag等合金或金属/无机复合材料。
或者，发光器件的第一极1为反射阴极；第二极2为透射阳极。其中，反射阴极可选用Al 2O 3等反射性金属及其氧化物；透明阳极可选用ITO。
为了更清楚本实施例中发光器件的结构，以下以发光器件发白光，需要对蓝光进行色度补偿为例进行说明。在此需要说明的是，之所以对白光发光器件补偿蓝光是因为，在白光发光器件中蓝光发光材料较容易老化。
由于白光发光器件需要对蓝光进行色度补偿，如图3所示，在本实施例中的电致变色基板4可以包括：依次设置在发光器件的第二极2之上的第一透明导电层41、电致变色层43、电解质层44、第二透明导电层42。
其中，第一透明导电层41和第二透明导电层42的材料包括ITO等透明导电材料。电解质层44为全固态聚合物电解质，或凝 胶聚合物电解质，或两者复合材料。电致变色层43材料为WO 3或普鲁士白，其中，电致变色层43的材料为WO 3时，其氧化态WO 3为透明薄膜，其还原态MxWO 3为蓝色；当电致变色层43材料为普鲁士白时，是一种透明薄膜，当其被氧化后成为普鲁士蓝，变为蓝色。
其中，色度测试仪在获取了发光器件所发出的白光的色度后，处理器根据色度测试仪获取的初始及实时白光发光器件的所发出的白光的色度坐标进行运算处理，分析出需要补偿色度的蓝光，处理器进一步则根据该蓝光，计算出相应的电信号，并利用驱动器将该电信号加载至电致变色基板4的第一透明导电层41和第二透明导电层42上，以使电致变色层43发出蓝光，以对发光器件的白光进行补偿，发出稳定白光。其中，电致变色基板4在未加载电压时，电致变色基板4呈透明状态。
其中，本实施例中的色度测试仪包括光学系统、分光器，其中，光学系统用于获取发光器件所发出的光；分光器用于对所述光学系统所获取的发光器件所发出的光进行分析计算，得到发光器件的发光色度。
本实施例中的发光器件中利用处理器根据发光器件的实时色度计算出相应的电信号，驱动器以该相应的电信号对电致变色基板4进行驱动，以使电致变色基板4由透明变为蓝色。可以实时监控白光发光器件的色度坐标，根据色偏情况进行实时补偿，以保证稳定纯白发光显示，提高白光发光器件的质量及使用寿命。
实施例2：
本实施例提供一种显示装置，其包括上述实施例中的发光器件，故其显示效果较佳。
其中，本实施例的显示装置可以为OLED面板、电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (10)

  1. 一种发光器件，包括：基底，以及依次设置在所述基底上的第一极、发光层、第二极；
    其中，所述发光器件还包括设置在所述第二极之上的有电致变色基板、设置在所述发光器件出光侧的色度测试仪、处理器、以及驱动器；其中，
    所述色度测试仪，用于获取所述发光器件的发光色度；
    所述处理器，用于根据所述色度测试仪所获取的所述发光器件的发光色度，计算出所述发光器件所需要补偿的色度；并且根据计算出的所述发光器件所需要补偿的色度，计算出相应的电信号；以及
    所述驱动器，用于以所计算出的相应的电信号驱动所述电致变色基板发光，以对所述发光器件的发光色度进行补偿。
  2. 根据权利要求1所述的发光器件，其中，所述发光器件还包括存储器，其存储有所述发光器件的发光色度与其所需要补偿的色度之间的对应关系；以及
    所述处理器，用于根据所述色度测试仪所获取的所述发光器件的发光色度，和所述存储器中所述发光器件的发光色度与其所需要补偿的色度之间的对应关系，计算出所述发光器件所需要补偿的色度。
  3. 根据权利要求2所述的发光器件，其中，所述电信号包括电压信号；所述存储器还存储有所述发光器件所需要补偿的色度与所述电压信号之间的对应关系；
    所述处理器，用于根据所计算出的所述发光器件所需要补偿的色度，和所述发光器件所需要补偿的色度与所述电压信号之间的对应关系，计算出相应的电信号。
  4. 根据权利要求1所述的发光器件，其中，所述第一极为反射阳极；所述第二极为透射阴极；或者，
    所述第一极为反射阴极；所述第二极为透射阳极。
  5. 根据权利要求1所述的发光器件，其中，所述发光器件包括白光发光器件；所述电致变色基板为在施加电信号时发出蓝光、在未施加电信号时呈透明状态的结构。
  6. 根据权利要求1所述的发光器件，其中，所述电致变色层包括：依次设置在所述第二极之上的第一透明导电层、电致变色层、电解质层、第二透明导电层。
  7. 根据权利要求6所述的发光器件，其中，所述电解质层的材料包括：全固态聚合物电解质，或凝胶聚合物电解质，或两者复合材料。
  8. 根据权利要求6所述的发光器件，其中，所述电致变色层的材料包括：WO 3或普鲁士白。
  9. 根据权利要求1所述的发光器件，其中，所述色度测试仪包括光学系统和分光器；
    所述光学系统，用于获取所述发光器件所发出的光；
    所述分光器，用于对所述光学系统所获取的所述发光器件所发出的光进行分析计算，得到所述发光器件的发光色度。
  10. 一种显示装置，包括权利要求1-9中任一项所述的发光器件。
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