Transparent Display Touch Routing Across Non-Transmissive Areas
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Solution Overview
Problem
Transparent display devices face challenges in maintaining high light transmittance due to the presence of touch sensors and touch lines, and the process of integrating these components is complex.
Innovation Solution
The transparent display device is designed with transmissive and non-transmissive areas, where touch sensors and lines are strategically positioned in non-transmissive areas, and bridge lines connect touch sensors across transmissive areas, using undercut structures to maintain separation and minimize overlap with light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensors and touch lines are integrated into the transparent display device, then touch functionality is achieved, but light transmittance is reduced
Solution Approach 1:
The touch line is configured to extend only in the non-transmissive area of the display, avoiding placement in transmissive areas where light transmission is critical. This local differentiation allows the touch function to be implemented without compromising light transmittance in the transmissive regions.
Solution Approach 2:
The touch sensor is positioned to overlap with the light emitting element in the vertical dimension, allowing both components to coexist in the same spatial footprint. This dimensional arrangement enables touch functionality while maintaining light transmission paths in the horizontal plane.
2Reliability
If multiple touch lines are provided to connect touch sensors, then comprehensive touch detection is achieved, but device complexity increases
Solution Approach 1:
Multiple touch sensors arranged in the second direction are connected to a single touch line through bridge lines, merging multiple connection paths into one main line. This reduces the total number of touch lines required while maintaining comprehensive touch detection coverage across all sensors.
Solution Approach 2:
Bridge lines serve as intermediary connections between touch sensors and the main touch line. These bridge lines enable indirect connection of multiple sensors to a single touch line, simplifying the overall connection architecture while ensuring all sensors are properly connected for touch detection.
Data Source
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AI summary
A transparent display device is provided, which may minimize loss of light transmittance due to a touch sensor and a touch line and simplify a touch process. The transparent display device comprises a substrate (111) provided with a plurality of transmissive areas (TA) and a non-transmissive area (NTA) including a plurality of light emission areas (EA) disposed between the transmissive areas (TA) adjacent to each other, a plurality of light emitting elements provided in each of the plurality of light emission area (EA)s over the substrate (111), a plurality of touch sensors (TS) provided in each of the plurality of transmissive areas (TA) over the substrate (111), a plurality of touch lines (TL) provided in the non-transmissive area (NTA) over the substrate (111) and extended in a first direction, and a plurality of bridge lines (BL) provided in the non-transmissive area (NTA) over the substrate (111) and extended in a second direction to connect at least touch sensors (TS) disposed in the second direction with one of the plurality of touch lines (TL).