Display Device Crosstalk Compensation for Sensing Accuracy
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Solution Overview
Problem
The accuracy of induced charges in sensing units of display screens is compromised due to voltage variations in display data lines affecting common electrodes, leading to reduced accuracy in functions like laser recognition, infrared light intensity judgment, and pressure recognition.
Innovation Solution
A display device and control method that includes a control module to compensate initial collection data from sensing units based on crosstalk extent, using influence factors such as capacitive coupling, row attenuation, location, and sensing coupling coefficients to synchronize data signals and reduce interference, thereby improving the accuracy of induced charges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sub-pixels and sensing units share common electrodes and scan lines to reduce device complexity, then device complexity is reduced, but measurement precision of sensing units deteriorates due to voltage crosstalk from data lines
Solution Approach 1:
The patent introduces a compensation capacitor as an intermediary element connected between the common electrode and reference potential. This capacitor mediates the coupling between data lines and sensing units, allowing the system to maintain shared common electrodes while compensating for voltage crosstalk. The compensation capacitor acts as a buffer that isolates the sensing operation from data line interference, resolving the contradiction between device simplicity and measurement accuracy.
Solution Approach 2:
The patent dynamically adjusts the compensation amount by changing the effective capacitance value through control signals that modify the compensation capacitor's state. By varying the compensation parameter (capacitance value) based on detected crosstalk levels, the system maintains high measurement precision while keeping the physical structure simple. This parameter adjustment allows adaptive optimization without adding complex hardware.
2Adaptability or versatility
If voltage variation of display data lines is used to control sub-pixels, then display function is achieved, but the induced charges obtained from sensing units are affected, reducing sensing accuracy
Solution Approach 1:
The patent implements a feedback mechanism where the system first detects the crosstalk extent by performing a test sensing operation, then uses this detected information to calculate and apply appropriate compensation. The control module continuously monitors the interference level and adjusts the compensation capacitor accordingly, creating a closed-loop system that maintains sensing accuracy despite ongoing display operations and voltage variations in data lines.
Solution Approach 2:
The patent performs preliminary compensation setup before actual sensing operations. The system pre-calculates compensation values based on expected crosstalk conditions and configures the compensation capacitor in advance. This preliminary action ensures that when sensing operations occur, the compensation is already in place, preventing accuracy degradation from data line voltage variations during critical measurement phases.
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
The solution effectively reduces interference from data signals, enhancing the accuracy of induced charges and improving the performance of sensing functions in display screens.
Implementation Method 1
as voltage variation of the display data lines can affect voltage variation of the common electrodes
Data Source
AI summary
A display device, a display control method, and an electronic equipment are provided. The display device includes a display panel, a driving module, a time schedule controller, a collection circuit, and a control module. The control module obtains initial collection data provided by sensing units, determines crosstalk extent on the initial collection data, and synchronously compensates the initial collection data according to the crosstalk extent. Induced charges corresponding to target collection data are reduced, or interference to data signals is prevented.