Display Substrate Light Shielding Layer Width Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Higher pixel density in display apparatuses leads to color mixture and reduced luminance due to decreased pixel pitch, as increasing the width of the light shielding layer to prevent color mixture also reduces the aperture ratio.
Innovation Solution
A substrate for display apparatuses featuring a translucent coloring layer with color regions, a first translucent resin layer at the boundaries of these regions, and a light shielding layer that overlaps with the resin layer, where the width of the light shielding layer is equal to or smaller than the resin layer's width, improving luminance and preventing color mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the width of the light shielding layer is increased to prevent color mixture, then color mixture is prevented, but the aperture ratio is reduced and luminance deteriorates
Solution Approach 1:
The patent introduces a third dimension (depth/thickness) by forming the light shielding layer on top of the translucent resin layer rather than directly on the substrate. This vertical arrangement allows the light shielding layer to have a reduced width while still effectively preventing color mixture, as the translucent resin layer provides additional optical path length for light blocking.
Solution Approach 2:
The translucent resin layer acts as an intermediary between the substrate and the light shielding layer. This intermediate layer enables the light shielding layer to be narrower while maintaining its color mixture prevention function, as the resin layer contributes to the overall light blocking capability through its optical properties and thickness.
2Productivity
If the pixel pitch is decreased to achieve higher pixel density, then pixel density is improved, but color mixture occurs and aperture ratio decreases
Solution Approach 1:
By utilizing the vertical dimension through the translucent resin layer, the patent enables narrower light shielding layers that can accommodate smaller pixel pitches without causing color mixture. The increased depth provides additional optical path length for effective light blocking in compact horizontal spaces.
Solution Approach 2:
The patent changes the optical parameters by introducing a translucent resin layer with specific optical properties (translucency, refractive index) and thickness. This parameter change allows the light shielding structure to be more efficient, enabling higher pixel density while preventing color mixture through optimized optical path management.
3Illumination intensity
If the width of the light shielding layer is reduced to improve aperture ratio, then luminance is improved, but color mixture may occur
Solution Approach 1:
The patent compensates for the reduced width of the light shielding layer by increasing its effective optical path length through the translucent resin layer. This vertical dimension enhancement maintains color mixture prevention capability while allowing the horizontal width to be minimized for higher aperture ratio.
Solution Approach 2:
The patent creates a composite light shielding structure consisting of the translucent resin layer and the light shielding layer working together. This composite structure achieves superior light blocking performance compared to a single layer, enabling narrower overall dimensions while maintaining effectiveness against color mixture.
Data Source
AI summary
According to an aspect, a substrate for a display apparatus includes: a first substrate; a translucent coloring layer that includes a plurality of color regions and that overlaps with the first substrate; a first translucent resin layer that overlaps with the first substrate at boundaries of the color regions; and a light shielding layer that overlaps with the first translucent resin layer on an opposite side to the first substrate side. A width of the light shielding layer in a direction parallel with the first substrate is equal to or smaller than a width of the first translucent resin layer in the parallel direction on a cross section vertical to the first substrate.