Touch Display Driving IC Dynamic Scan Frequency Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Integrated touch display devices face issues with increased power consumption and noise generation due to existing driving methods, particularly when integrating touch panels and display panels.
Innovation Solution
A touch display driving integrated circuit (TDDIC) that operates in a detection mode with low power consumption and noise when no touch is detected, switching to an activation mode with improved touch sensing performance when a touch is detected, by alternating between display and touch scan operations based on different frequencies and modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch scan frequency is increased to improve touch sensing performance, then touch sensing performance is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic touch scan frequency adjustment by switching between a first touch scan frequency (lower) and a second touch scan frequency (higher) based on whether a touch is detected. This dynamic adaptation allows the system to optimize touch sensing performance when needed while reducing power consumption during normal operation, directly resolving the contradiction between measurement precision and energy use.
Solution Approach 2:
The patent changes the operational parameter (touch scan frequency) from a fixed value to a variable value that can switch between two distinct frequencies. By modifying this parameter based on touch detection state, the system achieves both low power consumption during idle periods and high touch sensing performance when a touch occurs, effectively resolving the contradiction.
2Measurement precision
If the touch scan frequency is increased to improve touch sensing performance, then touch sensing performance is improved, but noise generation increases
Solution Approach 1:
The patent dynamically adjusts the touch scan frequency based on touch detection state, using a lower frequency during idle periods and a higher frequency when touch is detected. This dynamic approach reduces noise generation during normal operation while maintaining high touch sensing performance when needed, resolving the contradiction between measurement precision and harmful factors.
Solution Approach 2:
By changing the touch scan frequency parameter from fixed to variable, the system can operate at lower frequencies (reducing noise) during idle states and switch to higher frequencies (improving sensing) when touch detection is required, effectively resolving the contradiction between performance and noise generation.
3Area of stationary object
If the touch panel and display panel are integrated to reduce area, then area is reduced, but power consumption and noise generation increase
Solution Approach 1:
The patent applies dynamic operation mode switching that adapts the touch scan frequency based on touch detection state. This allows the integrated touch-display system to maintain reduced area while dynamically optimizing power consumption by using lower scan frequencies during idle periods and higher frequencies only when touch interaction occurs.
Solution Approach 2:
By implementing variable touch scan frequency operation, the patent enables the integrated panel system to reduce overall area while compensating for increased power consumption through intelligent parameter adjustment - operating efficiently at low power during idle states and switching to high-performance mode only when necessary.
Data Source
AI summary
A touch display driving integrated circuit (TDDIC) is configured to control a touch display panel. The TDDIC includes a touch driving circuit that performs a touch scan operation on the touch display panel, and a display driving circuit that performs a display operation on the touch display panel. The touch driving circuit operates in a first operation mode having a first touch scan frequency, and operates in a second operation mode having a second touch scan frequency different from the first touch scan frequency when a touch is detected from the touch display panel in the first operation mode.