Organic Light-Emitting Display Touch Wire Visibility Reduction
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Solution Overview
Problem
Conventional organic light-emitting display devices face issues with touch wires being visible, especially when viewed at different angles, due to non-uniform shielding and the narrow non-light-emitting parts, which affects the color viewing angle and user experience.
Innovation Solution
The organic light-emitting display device configures touch wires to correspond with specific positions of sub-pixels, with the intersection of touch wires located in the sub-pixel with the largest light-emitting part, and adjusts the ratio of touch wire area to light-emitting part area to minimize visibility, using island-shaped transparent conductive layers and specific metal materials like gold, silver, or alloys for the touch wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch panel is laminated with an organic light-emitting array to add touch detection function, then the display device gains touch capability, but the touch wires become visible in sub-pixels deteriorating visual sensation
Solution Approach 1:
The patent applies local quality by creating different light-emitting part areas in different sub-pixels. Specifically, one sub-pixel is designed with a larger light-emitting part area while other sub-pixels have smaller light-emitting part areas. This local differentiation allows the touch wire intersection to be positioned in the sub-pixel with the largest light-emitting part, where it is least visible, while maintaining normal display function in other sub-pixels.
2Area of stationary object
If the non-light-emitting part of the organic light-emitting array is reduced to increase display area, then the display area increases, but the touch wires become more visible as they pass through light-emitting parts
Solution Approach 1:
The patent resolves this contradiction by applying local quality differently across sub-pixels. By making one sub-pixel have a larger light-emitting part area while keeping other sub-pixels with smaller light-emitting part areas, the design allows touch wires to be positioned in the sub-pixel where they are least noticeable. This enables reduced non-light-emitting parts overall while maintaining aesthetic quality by concentrating the wire placement in the optimal location.
3Adaptability or versatility
If shielding touch wires are non-uniformly located in respective areas of the organic light-emitting array, then the touch panel structure is flexible, but the visibilities of touch wires vary in different areas deteriorating visual sensation
Solution Approach 1:
The patent applies asymmetry by intentionally creating an asymmetric structure in the sub-pixels. Instead of making all sub-pixels identical, one sub-pixel is designed with a larger light-emitting part area while others have smaller areas. This asymmetric design strategically positions the touch wire intersection in the sub-pixel with the largest light-emitting part, creating a uniform visual appearance across the display by ensuring wires are always in the least visible location.
Data Source
AI summary
An organic light-emitting display device includes an organic light-emitting array including a plurality of pixel areas, the pixel areas being arranged in a matrix; and a plurality of blocks, in each of which a plurality of touch wires are arranged in a first direction and a second direction. Each of the sub-pixels has a light-emitting part, the light-emitting part of one of the sub-pixels is larger than the light-emitting parts of the other sub-pixels, and an intersection of the touch wires arranged in the first direction and the second direction is located in the sub-pixel having the largest light-emitting part.