Gate Driving Circuit Multiplexer Signal Interference
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Solution Overview
Problem
In touch display devices, signal interference between image display lines and touch sensing lines can lead to deteriorated display quality and reduced touch sensing accuracy, particularly in areas adjacent to non-active regions.
Innovation Solution
A gate driving circuit with a multiplexer that receives clock signals of the same frequency but different phases, improving signal interference mitigation by outputting a single clock signal for image display, thereby enhancing touch sensing accuracy and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple signal lines transmit clock signals with the same frequency for image display, then scanning rate is maintained, but signal interference occurs with touch sensing lines causing screen shaking and reduced touch sensing accuracy
Solution Approach 1:
The patent changes the frequency parameter of the clock signal transmitted through the signal line. Specifically, it transmits a clock signal at a first frequency and derives a gate signal at a second frequency that is different from the first frequency. This frequency separation eliminates the signal interference between display and touch sensing lines while maintaining the scanning rate performance.
2Productivity
If clock signals with the same frequency are transmitted through adjacent signal lines, then display scanning is efficient, but interference with touch sensing lines reduces touch sensing accuracy in specific areas
Solution Approach 1:
The patent applies frequency parameter change to resolve the interference issue. The signal line transmits a clock signal at a first frequency, and the gate signal is generated at a second frequency different from the first. This frequency differentiation allows efficient display scanning while preventing interference with touch sensing lines, thereby maintaining touch sensing accuracy.
3Productivity
If the frequency of the gate clock signal is increased to maintain high scanning rates, then display performance improves, but interference with touch sensing lines increases causing screen shaking
Solution Approach 1:
The patent changes the frequency parameter by transmitting the clock signal at a first frequency and generating the gate signal at a second frequency that is different from the first frequency. This frequency separation allows high scanning rates to be maintained while eliminating the screen shaking caused by frequency matching between display and touch sensing signals.
Data Source
AI summary
Embodiments of the present disclosure relate to a touch display apparatus and a gate driving circuit, and more particularly, provide a touch display apparatus including: two or more signal lines that transmit clock signals having the same frequency and different phases; and a multiplexer including input nodes through which clock signals transmitted through the two or more signal lines are input and an output node outputting any one of clock signals input to the input nodes. According to the embodiments of the present disclosure, touch sensing accuracy and display quality are possible to be improved.