Application-Based Touchscreen Sensing for Lower Standby Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mobile electronic devices with capacitive touch screens face challenges in power consumption and standby time due to unnecessary power usage by unused touch areas.
Innovation Solution
A touch processing device and method that divides touch areas into first and second areas based on application usage, enabling touch sensing only in the first area during active use and disabling the second area when not in use, with determination based on touch sensing results within a predetermined time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the touch controller performs touch sensing on all touch areas of the touch screen, then the touch responsiveness and user interaction capability are improved, but the power consumption increases
Solution Approach 1:
The touch screen is divided into multiple touch areas, and the controller selectively enables or disables sensing in specific areas based on application requirements. This segmentation allows the system to maintain touch responsiveness only where needed, reducing overall power consumption while preserving user interaction capability in active regions.
Solution Approach 2:
The touch sensing capability is made dynamic rather than static. The controller adjusts the sensing state of different touch areas in real-time based on the running application, enabling areas when needed and disabling them when not needed. This dynamic adaptation optimizes the balance between touch responsiveness and power consumption.
2Use of energy by moving object
If the touch controller disables unused touch areas to save power, then the power consumption is reduced, but the touch coverage area decreases
Solution Approach 1:
Different regions of the touch screen are assigned different functional qualities based on application needs. Active touch areas maintain full sensing capability with high responsiveness, while inactive areas are disabled to save power. This local differentiation ensures that touch coverage is preserved exactly where users need to interact, while eliminating unnecessary power consumption in non-interactive regions.
3Measurement precision
If the touch sensing is continuously performed on all areas, then the touch detection accuracy is maintained, but the standby time is reduced
Solution Approach 1:
Instead of continuous sensing on all areas, the system implements periodic or conditional sensing only in active touch areas. The controller monitors which applications are running and enables touch sensing periodically or on-demand in the corresponding touch areas, rather than maintaining continuous sensing across the entire screen. This approach maintains adequate touch detection accuracy in active regions while significantly extending standby time.
Data Source
AI summary
A touch processing device and a touch processing method are provided. The touch processing device includes a processor, a touch controller, and a touch screen. The touch screen comprises a first touch area and a second touch area. The first touch area and the second touch area are divided based on a specific application. In response to the touch processing device accessing or executing the specific application, the processor controls the touch controller to perform touch sensing on the first touch area and disable the second touch area. In response to the touch processing device not accessing the specific application, the processor controls the touch controller to perform touch sensing on the first touch area and the second touch area.