Segmented Light Shielding Body for Display Devices
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Solution Overview
Problem
In display devices with horizontal electric fields, static electricity interference causes display disturbances due to the absence of electrodes on one substrate, leading to light leakage and potential short circuits between routing wiring and light shielding bodies.
Innovation Solution
A slit is introduced in the light shielding layer on the second substrate to split it into frame patterns, with a light shielding body on the first substrate positioned between the display and terminal areas, comprising light shielding pieces on different layers to prevent short circuits and minimize light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an elongated light shielding body is formed to traverse the pieces of routing wiring, then light leakage is suppressed, but electrostatic discharge is easily caused and short circuits may occur
Solution Approach 1:
The light shielding body is divided into multiple light shielding pieces arranged in the extending direction of the slit. Each light shielding piece is electrically insulated from adjacent pieces by being arranged on different layers via an insulating layer, preventing short circuits while maintaining light shielding effectiveness
Solution Approach 2:
The light shielding pieces are arranged on different layers (vertical dimension) rather than being coplanar. This multi-layer arrangement provides both light shielding and electrical insulation, resolving the contradiction between light leakage suppression and short circuit prevention
2Reliability
If the light shielding layer is split into frame patterns with a slit, then static electricity influence is reduced, but light leakage may occur in the region between display area and terminal area
Solution Approach 1:
The light shielding body is segmented into multiple pieces that collectively cover the slit region. This segmentation allows the light shielding function to be distributed while maintaining electrical insulation between segments
Solution Approach 2:
The light shielding pieces are arranged to be superimposed on the slit and nested in a multi-layer configuration. The pieces overlap in the vertical direction to ensure complete light shielding while the insulating layer between layers prevents electrical short circuits
Data Source
AI summary
A display device according to an aspect of the present invention includes a first substrate, a second substrate faces the first substrate, and a light shielding layer provided on the second substrate. The second substrate has a slit that splits the light shielding layer into a first frame pattern close to the center of the second substrate and a second frame pattern away from the center. The first substrate includes a light shielding body superimposed on the slit in a region between a display area and a terminal area of the first substrate. The light shielding body includes a plurality of light shielding pieces arranged in an extending direction of the slit. The light shielding pieces adjacent to each other are arranged on different layers via an insulating layer, and are electrically insulated from each other.