Shielding Part for Input Sensing Display Device
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Solution Overview
Problem
Display devices face noise interference issues due to signal interference between driving signals for the display and those for the input sensing part, which affects the accuracy of external input detection.
Innovation Solution
The display device incorporates an input sensing part with an active region and an inactive region, featuring sensing electrodes, sensing lines, a ground line, and shield layers extending from the ground line to reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensing electrodes and sensing lines are disposed close to the display area, then the input sensing part can detect external inputs accurately, but signal interference between driving signals and sensing signals increases causing noise
Solution Approach 1:
A ground line is introduced as an intermediary element between the sensing lines and the display area. The ground line acts as a shield that blocks electromagnetic interference from reaching the sensing lines, allowing the sensing electrodes to be positioned close to the display area without suffering from signal interference noise
Solution Approach 2:
The harmful electromagnetic interference is extracted and directed away from the sensing region by the ground line. The ground line captures and grounds the interference signals, preventing them from affecting the sensing electrodes and enabling accurate input detection
2Object-affected harmful factors
If shield layers are added to reduce signal interference, then noise reduction is achieved, but device structure becomes more complex
Solution Approach 1:
The ground line is implemented as a thin film structure that can be easily integrated into the existing display panel fabrication process. This thin film ground line provides effective electromagnetic shielding while adding minimal structural complexity and maintaining compatibility with standard manufacturing processes
Data Source
AI summary
A display panel includes a display panel and an input sensor disposed on the display panel. The input sensor includes an active region and an inactive region at least partially surrounding the active region. The input sensor includes a plurality of sensing electrodes disposed in the active region, a plurality of sensing lines disposed in the inactive region and connected to the sensing electrodes, a ground line extending outwardly to a greater extent than the sensing lines in the inactive region, and at least one shield layer extending from the ground line in the inactive region.