Display Device Conductive Portion Width Optimization
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Solution Overview
Problem
Display devices with touch sensor functions experience reduced brightness and altered color tones when viewed from an oblique direction due to light blocking by sensor electrodes, especially in complex pixel arrangements where different colors are affected differently.
Innovation Solution
The display device incorporates a specific arrangement of light emitting regions and conductive portions, where the distance and width of conductive portions between adjacent light emitting regions are optimized to minimize light blocking, ensuring equal distances and widths for consistent color ratio preservation across angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensor electrodes are added to provide touch sensor function, then touch sensor function is achieved, but light blocking occurs causing reduced brightness and altered color tones when viewed from oblique directions
Solution Approach 1:
The conductive portions are designed with varying widths according to their positional relationships with light emitting regions. Specifically, the width of each conductive portion is determined based on the distances to adjacent light emitting regions of different colors, creating local variations in conductive portion dimensions to compensate for differential light blocking effects across different colors and positions
Solution Approach 2:
The patent changes the geometric parameters (width and position) of conductive portions to optimize light blocking compensation. By adjusting the width of conductive portions based on their distances to adjacent light emitting regions, the design modifies physical parameters to achieve uniform color ratios when viewed from oblique directions
2Reliability
If conductive portions are placed between light emitting regions to maintain electrical connectivity, then electrical function is maintained, but light blocking increases causing color ratio changes
Solution Approach 1:
Conductive portions have different widths at different locations based on their positional relationships with adjacent light emitting regions. The width of each conductive portion is specifically designed considering the distances to light emitting regions of different colors, creating local quality variations that compensate for differential light blocking
Solution Approach 2:
The conductive portions exhibit asymmetric width variations rather than uniform dimensions. The width of each conductive portion is determined by its specific geometric relationship with adjacent light emitting regions of different colors, creating an asymmetric pattern that compensates for the asymmetric light blocking effects
Data Source
AI summary
A display device in an embodiment includes a first light emitting region; a second light emitting region located at a position away from the first light emitting region by a first distance in a first direction; a third light emitting region located at a position away from the second light emitting region by a second distance shorter than the first distance in the first direction; a first conductive portion located between the first light emitting region and the second light emitting region as seen from a display plane, the first conductive portion having a first width in the first direction, and a second conductive portion located between the second light emitting region and the third light emitting region as seen from the display plane, the second conductive portion having a second width shorter than the first width in the first direction.