Color Filter Substrate Edge Light Shielding and Static Isolation
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Solution Overview
Problem
Existing display devices suffer from light leakage at the periphery due to uncovered edges in the non-displaying region of the color filter substrate, and the enlargement of the black matrix to prevent this affects the electrical field and picture quality by transmitting static electricity to the black matrix.
Innovation Solution
A color filter substrate with a first light-shielding structure spaced apart from the edge of the non-displaying region and a second light-shielding structure extending inward from the edge, ensuring complete light shielding and preventing static electricity transfer to the black matrix by maintaining a distance between the silver gluing spots and the light-shielding structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the black matrix is enlarged to cover the entire non-displaying region edge, then light leakage is prevented, but static electricity is transmitted to the black matrix affecting the electrical field and picture quality
Solution Approach 1:
The light-shielding structure is divided into a first light-shielding structure (black matrix) on the front surface and a second light-shielding structure on the rear surface. This segmentation allows the first structure to be positioned away from the edge to avoid static electricity transmission, while the second structure extends to the edge to provide complete light shielding, thus resolving the contradiction between preventing light leakage and maintaining electrical field integrity.
Solution Approach 2:
The solution moves from a single-plane (front surface only) light-shielding approach to a multi-plane approach by adding a second light-shielding structure on the rear surface. This dimensional change allows the front surface black matrix to be positioned inward to avoid static electricity, while the rear surface structure provides edge coverage for complete light shielding.
2Reliability
If the black matrix is positioned away from the edge to avoid static electricity, then electrical field integrity is maintained, but light leakage occurs at the periphery
Solution Approach 1:
The light-shielding function is segmented between two structures: the first light-shielding structure (black matrix) on the front surface is positioned away from the edge to avoid static electricity transmission, while the second light-shielding structure on the rear surface extends to the edge to provide complete light shielding coverage.
Solution Approach 2:
The second light-shielding structure on the rear surface acts as an intermediary that extends to the edge to block light leakage, while the first light-shielding structure on the front surface remains positioned away from the edge to avoid static electricity transmission. Together they mediate between the conflicting requirements of light shielding and electrical field integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents light leakage and maintains the electrical field integrity by ensuring complete light shielding and isolating the static electricity transmission layer from the light-shielding structures, thereby improving picture quality and reducing static electricity effects.
Implementation Method 1
a first light-shielding structure disposed on a first surface of the underlying substrate... and a second light-shielding structure located in the non-displaying region and between the underlying substrate and the static electricity transmission layer
Implementation Method 2
a transparent static electricity transmission layer 5, and a silver gluing spot 6 is provided at an edge of the color filter substrate 2 so that the silver gluing spot 6 connects the static electricity transmission layer 5 to a ground point 7
Data Source
AI summary
A color filter substrate is provided. The color filter substrate includes an underlying substrate, a first light-shielding structure, a second light-shielding structure and an electrical conductive transparent layer configured for transferring electrostatic charge An outer edge of the first light-shielding structure is spaced apart by a first distance from an outer edge of the non-displaying portion of the underlying substrate. A vertical projection of a non-displaying portion of the underlying substrate on a first plane is entirely covered by a combination of a vertical projection of the first light-shielding structure on the first plane and a vertical projection of the second light-shielding structure on the first plane, the first plane being a plane perpendicular to a propagation direction of light emitted toward the non-displaying region of the color filter substrate.