Touch Display Pixel Structure Sharing Data and Readout Lines
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Solution Overview
Problem
Conventional touch sensitive displays require an additional readout line for signal transmission, which affects the aperture ratio, leading to non-uniform lightness and increases production costs due to defects and yield loss.
Innovation Solution
A novel pixel structure and method where no exclusive readout line is needed, utilizing a data line connected to a data driver and readout circuit for signal transmission and processing, allowing the same data line to handle both data writing and signal readout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional readout line is configured for signal transmission in conventional touch displays, then signal readout function is achieved, but aperture ratio decreases and lightness uniformity deteriorates
Solution Approach 1:
The data line is designed to serve dual purposes: transmitting data signals during the writing phase and transmitting photo signals during the reading phase. This multi-functionality eliminates the need for a separate readout line, thereby maintaining aperture ratio and lightness uniformity while achieving both data writing and signal readout functions.
Solution Approach 2:
The patent merges the data line and readout line into a single shared conductive path. By combining these two previously separate functions into one line, the structure is simplified, aperture ratio is improved, and lightness uniformity is enhanced without sacrificing signal readout capability.
2Reliability
If an additional readout line is configured for signal transmission, then signal readout function is achieved, but device complexity and production costs increase
Solution Approach 1:
The data line is designed to serve dual purposes: transmitting data signals during the writing phase and transmitting photo signals during the reading phase. This multi-functionality eliminates the need for a separate readout line, thereby simplifying the pixel structure and reducing production costs while maintaining both data writing and signal readout functions.
Solution Approach 2:
The patent merges the data line and readout line into a single shared conductive path. By combining these two previously separate functions into one line, the structure is simplified, fewer manufacturing steps are required, and production costs are reduced without sacrificing signal readout capability.
3Reliability
If an additional readout line is configured, then signal readout function is achieved, but manufacturing defects increase and yield decreases
Solution Approach 1:
The patent merges the data line and readout line into a single shared conductive path. By combining these two previously separate functions into one line, the number of patterning steps and material depositions is reduced, which directly decreases the probability of manufacturing defects and improves production yield while maintaining signal readout function.
Data Source
AI summary
A novel method for driving the data signal transmission and the photo signal readout in a pixel of a display as well as the novel pixel structure corresponding thereto is provided to overcome the lightness uniformity issue of the conventional touch sensitive display resulting from the configuration of readout line. In the present invention, the exclusive readout line for signal readout is not necessary anymore, and through the well-designed configuration for the novel pixel, the data line carrying on a data signal would transmit a photo signal to be read out and processed as well.