Electrochromic display panel and electronic paper

Abstract

The invention relates to an electrochromic display panel and electronic paper. The display panel comprises a first substrate, an electrochromic pixel array and a second substrate which are arranged insequence, the electrochromic pixel array comprises a plurality of electrochromic units which are arranged in an array and independently controlled, and each electrochromic unit comprises a first electrode, a black electrochromic pixel layer and a second electrode which are arranged in sequence; the first electrode is provided with a first opposite surface opposite to the second electrode, the second electrode is provided with a second opposite surface opposite to the first electrode, and a plurality of micro-nano structures are arranged on the first opposite surface and / or the second oppositesurface. An electrochromic unit is formed by the black electrochromic pixel layer, black, gray and white display can be achieved, the micro-nano structures are arranged on the first electrode and / orthe second electrode, the contact area can be increased, better electrochemical performance can be achieved, and the electric field distribution between the two electrodes is more even, therefore, theelectric conduction effect and the response speed are enhanced, also the structure is simple in structure, and the preparation is easy.

Description

technical field [0001] The invention relates to an electrochromic display panel and electronic paper, belonging to the field of display technology. Background technique [0002] Electrochromism (EC) refers to the phenomenon that the optical properties of materials (reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes under the action of an external electric field, and the appearance is manifested as color and transparency. reversible changes. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices. Electrochromic materials are one of the hotspots in material science research in recent years. Electrochromic materials are an important part of electrochromic devices, which dominate the electrochromic performance of devices. According to the structural properties of materials, electrochromic materials can be divided into anodic electroch...

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Problems solved by technology

[0003] 1) The electrochromic layer is often formed by injecting a liquid electrochromic material into the gap, which can easily cause the electrode above the gap to collapse due to pressure difference, and its packaging is difficult, and it is prone to liquid leakage, which seriously affects the electrochromic layer. The quality of the chromic display panel;

[0004] 2) When the ambient light is weak, the display effect is poor and it is not convenient for users to use;

[0005] 3) Existing electronic paper often cannot display pure black, or the device that displays pure black has a complex structure and slow response speed;

[0006] 4) The inhomogeneity of the applied electric field is large, which affects the dielectric strength of the dielectric;

[0007] 5) Under the same other conditions, the more uneven the electric field, the lower the dielectric strength of the dielectric, and it is easy to make other materials contact with the dielectric layer to cause corrosion reaction

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