Touch Sensing Frame Control Under Display Noise Conditions
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Solution Overview
Problem
Existing display devices face challenges in effectively managing noise levels during touch input operations, leading to inefficiencies in sensing and driving operations.
Innovation Solution
The electronic device incorporates a touch driving unit that operates in two modes based on noise levels, applying more touch driving signals in a first mode when noise is low and fewer signals in a second mode when noise is high, with sensing electrodes configured to sequentially or simultaneously receive signals based on noise conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch driving unit applies more touch driving signals to improve sensing accuracy, then measurement precision improves, but noise level increases
Solution Approach 1:
The touch driving unit dynamically switches between first and second driving modes based on noise levels. In the first mode, more touch driving signals are applied for high sensing accuracy. In the second mode, fewer signals are applied to reduce noise. This dynamic adaptation resolves the contradiction by adjusting signal quantity according to environmental conditions.
Solution Approach 2:
The system changes the parameter of signal quantity applied to sensing electrodes based on noise level detection. When noise is low, the system increases signal quantity for better precision. When noise is high, the system decreases signal quantity to avoid generating excessive noise. This parameter adjustment resolves the contradiction between precision and noise generation.
2Reliability
If the touch driving unit operates in first driving mode to apply more touch driving signals, then sensing reliability improves, but power consumption increases
Solution Approach 1:
The touch driving unit dynamically selects between first and second driving modes based on noise level detection. The first mode with higher power consumption is activated only when noise levels permit, providing reliable sensing. The second mode with lower power consumption is used when noise levels are high. This dynamic mode selection resolves the contradiction between reliability and power consumption.
Solution Approach 2:
The system changes the operating mode parameter based on noise conditions, adjusting power consumption levels accordingly. In low-noise environments, the system uses the first mode with higher power for reliable sensing. In high-noise environments, it switches to the second mode with reduced power consumption. This parameter change resolves the contradiction between reliability and energy usage.
3Adaptability or versatility
If the sensor layer operates in both first sensing frame and second sensing frame, then touch detection coverage improves, but device complexity increases
Solution Approach 1:
The sensing operation is segmented into two distinct sensing frames: the first sensing frame for data input section detection and the second sensing frame for blank section detection. Each frame uses appropriate driving modes tailored to its specific detection needs. This segmentation allows comprehensive coverage while managing complexity through structured, modular sensing operations.
Solution Approach 2:
The sensor layer operates periodically through alternating sensing frames. The first sensing frame and second sensing frame are executed in sequence, with each frame using appropriate driving modes. This periodic action provides comprehensive touch detection coverage while simplifying the system through regular, predictable operation cycles rather than continuous complex processing.
Data Source
AI summary
Provided is an electronic device including a display layer configured to operate in units of a display frame including a blank section and a data input section, a driving unit configured to output a sync signal and sense a noise value, a sensor layer configured to operate in a first sensing frame and a second sensing frame and including a plurality of sensing electrodes, and a touch driving unit configured to operate in a first mode when the noise value is less than a predetermined noise level and operate in a second mode when the noise value is greater than or equal to the predetermined noise level, wherein the touch driving unit may apply more touch driving signals to the plurality of sensing electrodes in the first mode than in the second mode.