Touch Detection Electrode Noise Reduction via Time Division
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices with touch detection functions face challenges in efficiently performing touch detection and noise detection operations, particularly in reducing noise detection time and enhancing noise detection capabilities.
Innovation Solution
The implementation of a display device that performs image display and touch detection in a time division manner within one frame period, utilizing a matrix of pixel electrodes, a display function layer, touch detection electrodes, and a detection unit that conducts noise detection during a period shorter than the detection operation period, allowing for optimized touch and noise detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If noise detection is performed during the detection operation period, then noise detection capability is enhanced, but noise detection time increases
Solution Approach 1:
The patent applies partial action by performing noise detection only during specific sub-periods within the detection operation period rather than continuously. The detection unit selectively activates noise detection in certain time windows, achieving adequate noise detection capability while reducing overall detection time and power consumption.
Solution Approach 2:
The patent implements periodic noise detection by dividing the detection operation period into multiple intervals and performing noise detection at specific periodic intervals. This approach allows the system to maintain noise detection capability while reducing the total time spent on noise detection compared to continuous monitoring.
2Adaptability or versatility
If image display and touch detection are performed simultaneously, then device functionality is enhanced, but detection accuracy deteriorates due to interference
Solution Approach 1:
The patent segments the frame period into distinct display operation periods and detection operation periods. By dividing the operational timeline into separate segments for display and touch detection, the system maintains full functionality while preventing interference between the two operations, thereby preserving detection accuracy.
Solution Approach 2:
The patent employs periodic alternation between display operation periods and detection operation periods. This periodic scheduling ensures that touch detection occurs during dedicated time windows free from display-related interference, maintaining detection accuracy while preserving overall device functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables effective touch detection and noise detection operations, improving the overall performance of display devices with touch detection functions by reducing noise detection time and enhancing noise detection functionality.
Implementation Method 1
a plurality of touch detection electrodes opposed to the pixel electrodes... a detection unit that detects an output signal of the touch detection electrode
Data Source
AI summary
According to an aspect, a display device with a touch detection function performs image display and touch detection in a time division manner in one frame period. The display device includes: a plurality of pixel electrodes arranged in a matrix in a display region in which an image is displayed; a display function layer having an image display function for displaying an image in the display region; a plurality of touch detection electrodes opposed to the pixel electrodes; and a detection unit that performs noise detection. The one frame period includes a plurality of display operation periods for displaying the image and a plurality of detection operation periods for performing at least touch detection. The detection unit performs the noise detection in a period that is included in the detection operation period and shorter than one of the detection operation periods in the one frame period.