Electro-optical device and electronic apparatus

The electro-optical device uses a combination of columnar and trench-type connections for electrodes to maintain pixel flatness and prevent impurity entry, enhancing display quality by lengthening impurity paths and ensuring alignment film unevenness.

JP2025006174APending Publication Date: 2025-01-17SEIKO EPSON CORP
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Patent Information

Application Number
JP2023106811
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-29
Publication Date
2025-01-17

AI Technical Summary

Technical Problem

The use of columnar plugs for connecting electrodes in electro-optical devices can improve pixel electrode flatness, but increases the risk of impurity entry into the display area, leading to display stains and reduced quality.

Method used

The electro-optical device employs a configuration with a first electrode connected via a columnar plug and a second electrode connected via trench-type wiring, which maintains pixel electrode flatness while lengthening the impurity penetration path, using materials like ITO and FTO for electrodes and insulating layers with specific through-hole designs.

Benefits of technology

This configuration suppresses impurity entry into the display area, maintaining high transmittance and display quality by ensuring the alignment film has unevenness, thereby preventing display defects.

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Abstract

To provide an electro-optical device that suppresses deterioration in display quality and an electronic apparatus.SOLUTION: An electro-optical device comprises a first substrate, a second substrate, an electro-optical layer, and a sealing member, and has a display area, a sealing area in which the sealing member is provided, and an intermediate area. The first substrate includes a first electrode provided for each pixel, a first coupling electrode, a first contact provided in an insulating layer and electrically couples the first electrode to the first coupling electrode, a second electrode provided in the intermediate area, a second coupling electrode, and a second contact electrically couples the second electrode to the second coupling electrode. The first contact is a plug disposed in a first through hole provided in the insulating layer, and the second contact includes the same material as the material of the second electrode, and disposed along an inner wall forming a second through hole provided in the insulating layer.SELECTED DRAWING: Figure 6
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Citation Information

Patent Citations

  • Electro-optical device and electronic apparatus

    JP2021033073A