Touch-Enabled Display Panel Using Source Gate Lines for Signal Readout
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Solution Overview
Problem
Integrated type LCD panels with touch functionality suffer from reduced transmissivity due to the need for additional readout lines for touch detection, which complicates the display panel structure and manufacturing process.
Innovation Solution
A display device and method that utilize a display panel with a source driving part, a gate driving part, and a readout part, where the readout signals are generated during the elimination period of a frame period, allowing touch detection without additional lines by using the source and gate lines for both image display and touch position sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional readout lines are added for touch detection, then touch detection capability is improved, but transmissivity deteriorates
Solution Approach 1:
The source and gate lines are designed to serve dual purposes: displaying images during the display period and detecting touch positions during the elimination period. This multi-functionality eliminates the need for separate readout lines, thereby maintaining high transmissivity while enabling touch detection capability.
2Adaptability or versatility
If additional readout lines are added for touch detection, then touch detection capability is improved, but device complexity increases
Solution Approach 1:
The existing source and gate lines are utilized for both image display and touch detection functions, eliminating the need for additional readout lines and simplifying the overall panel structure.
Solution Approach 2:
The system alternates between display period and elimination period within each frame period. During the display period, images are displayed; during the elimination period, touch detection is performed. This periodic switching allows single lines to fulfill multiple functions without interference.
3Adaptability or versatility
If additional readout lines are added for touch detection, then touch detection capability is improved, but manufacturing complexity increases
Solution Approach 1:
By making the source and gate lines multi-functional, the manufacturing process is simplified as fewer distinct components need to be fabricated and integrated. The same line structures serve both display and touch detection purposes.
Data Source
AI summary
A display device includes a display panel, a source driving part, a gate driving part, a readout part and a pulse generating part. The display panel includes an array substrate on which a source line and a gate line are formed, and an opposite substrate on which a common electrode is formed. The readout part is electrically connected with at least one of the lines of the array substrate and the common electrode of the opposite substrate, and reads out a detection signal during an elimination period of a frame period. The pulse generating part outputs a control pulse for driving the readout part during the elimination period. Accordingly, a detection signal is read out through lines or a common electrode that are/is formed for displaying an image, so that an aperture ratio may be increased, and a manufacturing process thereof may be simplified.