Transparent Display Touch Sensor Light Transmittance
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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 they also struggle with detecting defective touch sensors, which complicates the manufacturing process and reduces performance.
Innovation Solution
The design incorporates touch sensors and lines in non-transmissive areas, using a substrate with transmissive and non-transmissive regions, where touch lines are placed to minimize light transmittance loss and a high resistance cathode power area is used to detect defective touch sensors, simplifying the touch process and improving detection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch sensors and touch lines are provided in the transparent display device, then touch function is implemented, but light transmittance is reduced
Solution Approach 1:
The touch lines are extracted and relocated to the non-transmissive area, separating them from the transmissive area to eliminate their blocking effect on light while maintaining touch functionality in the transmissive region
Solution Approach 2:
The layout is reorganized by utilizing the non-transmissive area as a dedicated zone for touch lines, effectively using spatial dimensionality to resolve the conflict between touch functionality and light transmission
2Measurement precision
If multiple touch sensors are provided in the transparent display device, then touch detection capability is improved, but device complexity increases
Solution Approach 1:
The non-transmissive area is segmented into multiple cathode power areas, with each area corresponding to a specific touch sensor, enabling independent detection and simplified defect identification for each sensor
Solution Approach 2:
The high-resistance cathode power areas serve as intermediary zones that electrically isolate adjacent touch sensors, enabling independent voltage application and defect detection without requiring complex external testing equipment
3Illumination intensity
If touch lines are extended in the non-transmissive area, then light transmittance is maintained, but manufacturing complexity increases
Solution Approach 1:
The touch lines are merged with the cathode power lines in the non-transmissive area, allowing dual functionality from a single structural element and simplifying the manufacturing process by reducing the number of separate components
Data Source
AI summary
A transparent display device with a touch sensor is provided, which may reduce loss of light transmittance due to a touch sensor and a touch line, and may detect a line area, in which a defective touch sensor is included. The device includes a substrate provided with a plurality of transmissive areas and a non-transmissive area disposed between the transmissive areas adjacent to each other. The device includes a touch line extended from the non-transmissive area and connected to a touch sensor electrode, and a common power line connected to a cathode electrode to supply a cathode power source. The non-transmissive area includes a cathode power area to which the cathode power source is applied through the common power line, the cathode power area includes a first cathode power area and a second cathode power area. The second cathode power area may have resistance higher than that of the first cathode power area.