Touch Sensor Layout Around Camera Hole to Reduce Display Interference
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Solution Overview
Problem
Display devices with touch screens face signal interference and dead spaces near holes for camera accommodations, which degrade touch recognition and sensitivity.
Innovation Solution
The design includes a light-emitting substrate with recesses and a touch sensing unit where signal lines are routed to avoid overlapping with the hole area, using a connector structure that bypasses the hole area to reduce interference and minimize dead spaces, enhancing touch performance and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal lines are routed near the hole area to accommodate camera features, then the display structure can be compact, but signal interference occurs and touch recognition deteriorates
Solution Approach 1:
The non-display area is segmented into distinct zones: hole area, recess area surrounding the hole, and peripheral area. Signal lines are strategically routed through the peripheral area while touch electrode connecting wires are placed in the recess area, creating spatial separation that reduces interference while maintaining compact overall structure.
Solution Approach 2:
The patent utilizes vertical layering to resolve horizontal interference conflicts. Multiple layers are employed: light-emitting substrate layer, touch sensing unit layer, and connecting wire layer. By distributing signal lines and touch electrodes across different layers and using connectors that extend vertically, the design achieves compact horizontal footprint while maintaining electrical isolation and reducing interference.
2Area of stationary object
If connecting wires are placed near the hole area to reduce dead space, then display area utilization improves, but signal interference with touch electrodes increases
Solution Approach 1:
Connectors serve as intermediary elements between touch electrodes and signal lines. The connectors include connecting wires that extend from touch electrodes in the recess area, bypass through the hole area without causing interference, and connect to signal lines in the peripheral area. This intermediary structure allows compact area utilization while maintaining electrical isolation.
Solution Approach 2:
Different regions are assigned different functions and properties: the recess area contains touch electrode connecting wires with specific routing patterns, the hole area serves as a transition zone with minimized interference, and the peripheral area contains signal lines. Each region is optimized for its specific function, allowing dead space reduction while preventing signal interference.
3Productivity
If the display area is maximized by minimizing non-display areas, then productivity and display coverage improve, but touch sensitivity near holes deteriorates
Solution Approach 1:
The recesses are formed in advance in the light-emitting substrate around the hole area, creating a prepared structure that guides subsequent placement of touch electrodes and connecting wires. This preliminary structural preparation ensures that touch-sensitive areas are positioned optimally around the hole, maintaining high touch sensitivity while maximizing overall display coverage.
Data Source
AI summary
A display device includes: a light-emitting substrate including a base substrate having a non-display area and a display area that surrounds the non-display area; an input sensing unit disposed on the light-emitting substrate; and a hole penetrating front and rear surfaces of each of the light-emitting substrate and the input sensing unit, wherein the light-emitting substrate includes a plurality of recesses, the non-display area includes a hole area which overlaps with the hole, a recess area in which the plurality of recesses are disposed and surrounds the hole area, and a peripheral area which surrounds the recess area, and the input sensing unit includes a plurality of first sensor members overlapping the display area and a first connector connecting the first sensor members and overlapping the groove area.