Display Light-Blocking Layer Layout for Afterimage Reduction
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Solution Overview
Problem
Display devices experience afterimages due to differences in driving time between display areas, particularly in flexible and foldable light emitting display devices.
Innovation Solution
Incorporating a light blocking layer with varying widths and spacings between emission areas in different display areas to minimize the occurrence of afterimages, with wider spacings and widths in certain areas to reduce color filter thickness and increase light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform light blocking layer width is used across all display areas, then manufacturing is simplified, but afterimages occur due to differences in driving time between display areas
Solution Approach 1:
The light blocking layer is configured with different widths in different display areas. Specifically, the light blocking layer has a first width in a first display area and a second width in a second display area, where the first width is greater than the second width. This local differentiation compensates for differences in driving time between display areas, preventing afterimages while maintaining overall system reliability.
2Use of energy by moving object
If wider light blocking layer spacing is used between emission areas, then color filter thickness can be reduced and light efficiency increased, but the area for light emission is reduced
Solution Approach 1:
The light blocking layer width is optimized differently in different display areas. In the first display area, a wider light blocking layer is used to prevent afterimages. In the second display area, a narrower light blocking layer is used to maximize light emission area and efficiency. This local optimization allows the system to achieve both afterimage prevention and high light efficiency simultaneously.
Solution Approach 2:
The width parameter of the light blocking layer is changed across different display areas. By varying the light blocking layer width from the first width in the first display area to the second width in the second display area, the patent optimizes both afterimage prevention and light emission efficiency through parameter differentiation.
Data Source
AI summary
A display device comprises a first display area, a second display area adjacent to a side of the first display area, a third display area adjacent to a side of the second display area, a plurality of emission areas disposed in the first, second, and third display areas to emit light, and a light blocking layer surrounding the plurality of emission areas. A width of the light blocking layer between adjacent emission areas in a first direction in each of the first and third display areas is greater than a width of the light blocking layer between adjacent emission areas in the first direction in the second display area.