Touch Chip Channel Mapping for Per-Channel Noise Filtering
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Solution Overview
Problem
Existing touch chips struggle with noise interference, leading to inconsistent filtering performance across touch-sensing channels, which affects production line yield and device performance due to shared analog-to-digital conversion circuits and lack of individual noise data acquisition and parameter setting.
Innovation Solution
Implementing a touch chip with individual analog-to-digital conversion circuits for each touch-sensing channel, along with a mapping circuit to establish noise-data-to-filtering-parameter relationships, allowing for customized filter settings based on unique noise profiles of each channel and varying working conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple touch-sensing channels share common analog-to-digital conversion circuits, then device complexity is reduced, but noise interference increases and filtering performance becomes inconsistent across channels
Solution Approach 1:
The patent divides the touch-sensing system into independent channels, where each touch-sensing channel has its own dedicated analog-to-digital conversion circuit. This segmentation isolates noise sources to individual channels, preventing noise propagation across multiple channels and enabling independent optimization of filtering parameters for each channel based on its specific noise characteristics.
2Object-affected harmful factors
If individual analog-to-digital conversion circuits are assigned to each touch-sensing channel, then noise reduction capability is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by allowing each touch-sensing channel to have customized filtering parameters tailored to its specific noise characteristics. By acquiring original noise data from each channel and setting individual filter parameters, the system optimizes noise reduction performance for each channel's local conditions rather than applying a uniform filtering approach across all channels.
3Ease of operation
If filter parameters are set uniformly for all touch-sensing channels, then ease of operation is improved, but filtering effectiveness decreases due to noise variations across channels
Solution Approach 1:
The patent implements preliminary action by acquiring original noise data from each touch-sensing channel during the manufacturing or calibration phase. This pre-acquisition of noise characteristics allows the system to establish customized filtering parameters for each channel before actual touch sensing operations begin, ensuring optimal noise reduction performance is already configured when the device is put into use.
Data Source
AI summary
A touch chip, a touch control testing method and an electronic device are provided. The touch chip is applied to a touch display panel including a plurality of touch-sensing channels. The touch chip includes a plurality of analog-to-digital conversion circuits electrically connected to the plurality of touch-sensing channels of the touch display panel in one-to-one correspondence.