Display Apparatus Parallel Touch Detection Noise Reduction
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Solution Overview
Problem
Existing display apparatuses with touch detection functions face challenges in accurately detecting touches due to noise interference from display driving, which limits touch detection accuracy and frequency, especially when using time division control methods.
Innovation Solution
A display apparatus design that includes multiple scanning lines and touch detection electrodes, with an operation controller managing display scanning signals and touch drive signals to allow parallel operation of display and touch detection, reducing noise interference and enabling more frequent and accurate touch detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time division control is used to reduce noise interference, then touch detection accuracy is improved, but touch detection frequency is reduced and detection time is increased
Solution Approach 1:
The display screen is divided into multiple regions, each with its own scanning lines and touch detection electrodes. The operation controller divides the display area into first and second regions, allowing independent scanning and touch detection operations in each region. This segmentation enables parallel processing of display and touch detection functions.
Solution Approach 2:
The patent introduces spatial dimensionality by dividing the display area into multiple regions that can be scanned and detected in different spatial zones simultaneously. The first and second scanning lines operate in different regions, creating a multi-dimensional approach to resolving the time conflict between display updating and touch detection.
2Productivity
If parallel operation of display and touch detection is implemented, then productivity is improved, but noise interference increases and measurement precision deteriorates
Solution Approach 1:
The display area is segmented into multiple regions with separate scanning lines and touch detection electrodes. This allows the operation controller to perform display scanning and touch detection in different spatial regions simultaneously, achieving parallel operation while minimizing noise interference through spatial separation.
Solution Approach 2:
Different regions of the display have specialized functions - some regions prioritize display updating while others prioritize touch detection. The operation controller assigns specific scanning lines to specific regions, creating local quality differences that optimize both display performance and touch detection accuracy in their respective zones.
3Object-affected harmful factors
If time division control is used, then noise interference is reduced, but the number of touch detection samples is reduced
Solution Approach 1:
The display area is divided into multiple regions, each capable of independent touch detection. This segmentation allows the system to perform multiple touch detection operations simultaneously in different regions, increasing the total number of detection samples while maintaining low noise interference through spatial separation.
Solution Approach 2:
The parallel operation mode allows touch detection to continue continuously across multiple regions while display scanning progresses simultaneously. This eliminates the intermittent nature of time division control, providing continuous touch detection coverage and increasing the number of available detection samples.
Data Source
AI summary
According to an aspect, a display apparatus includes: a plurality of scanning lines including a first scanning line and a second scanning line, wherein the first scanning line is adjacent to the second scanning line in a first direction; a plurality of touch drive electrodes including a first touch drive electrode and a second touch drive electrode, wherein the first touch drive electrode is adjacent to the second touch drive electrode in the first direction; and an operation controller, wherein the operation controller is configured to provide a display scanning signal to a selected scanning line of the plurality of scanning lines and scan the plurality of scanning lines in a second direction and provide a touch drive signal to a selected touch drive electrode of the plurality of touch drive electrodes that is not coupled to the selected scanning line.