Display Sensing Circuit Voltage Compensation Method
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Solution Overview
Problem
Existing display technologies fail to accurately compensate for capacitance differences among capacitors on internal sensing lines, leading to uneven display results due to the assumption of standardized capacitance values, which causes deviations in compensation results.
Innovation Solution
A sensing circuit comprising a reset circuit, charging circuit, adjustment circuit, voltage sensing circuit, and calculation circuit that measures and adjusts the capacitance values of capacitors on internal sensing lines, allowing for individual capacitance-based voltage compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same standardized capacitance value is assumed for all capacitors on internal sensing lines, then the compensation process is simplified, but the measurement precision deteriorates due to process deviations causing actual capacitance variations
Solution Approach 1:
The patent divides the sensing lines into multiple groups based on their capacitance characteristics. Instead of treating all sensing lines uniformly, the system segments them and applies different compensation voltages to each group, thereby improving measurement precision while managing complexity through organized categorization.
Solution Approach 2:
The patent changes the compensation voltage parameter according to the specific capacitance characteristics of different sensing line groups. By adjusting the voltage parameter based on measured capacitance values, the system achieves higher precision compensation without requiring complete redesign of the compensation process.
2Measurement precision
If individual capacitance measurement and compensation is implemented for each sensing line, then the measurement precision improves, but the device complexity increases due to multiple compensation voltages required
Solution Approach 1:
The patent designs a multi-functional sensing circuit that can measure capacitance values and automatically determine appropriate compensation voltages. This universal circuit performs multiple functions (sensing, measuring, calculating, and controlling compensation) within a single integrated system, improving precision without proportionally increasing overall device complexity.
Solution Approach 2:
The patent implements a feedback mechanism where the sensing circuit measures actual capacitance values, compares them with reference values, and automatically adjusts compensation voltages accordingly. This closed-loop feedback system achieves high precision compensation while reducing the need for manual intervention and complex external control circuits.
3Ease of operation
If capacitance differences are ignored and standardized values are used, then the ease of operation is maintained, but the display uniformity deteriorates due to compensation deviations
Solution Approach 1:
The patent performs preliminary capacitance measurement and classification of sensing lines before the actual display operation. By pre-characterizing the capacitance values and grouping sensing lines accordingly, the system establishes accurate compensation parameters in advance, ensuring display uniformity without complicating the actual display operation.
Solution Approach 2:
The sensing circuit automatically performs capacitance measurement, classification, and compensation voltage selection without requiring external intervention. The system serves itself by autonomously determining the appropriate compensation parameters based on measured values, maintaining ease of operation while achieving improved display uniformity.
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 ensures accurate capacitance measurement and compensation, improving the uniformity of the display by accounting for capacitance variations among internal sensing lines, thereby enhancing the display's electrical performance and preventing drift over time.
Implementation Method 1
reset circuit connected to the capacitor to be measured and configured to reset a voltage on the capacitor to be measured to a reference voltage
Implementation Method 2
charging circuit connected to a reference capacitor in the adjustment circuit and configured to charge the reference capacitor to a first voltage
Implementation Method 3
adjustment circuit comprises the reference capacitor connected to the charging circuit and configured to be connected to the capacitor to be measured in series after the reference capacitor is charged to the first voltage, so as to adjust the voltage on the capacitor to be measured to a second voltage
Data Source
AI summary
The present disclosure provides a sensing circuit and a voltage compensation method. With the sensing circuit according to the present disclosure, a capacitance value of a capacitor to be measured on an internal sensing line of a display panel is determined, a compensation voltage for the internal sensing line is determined according to the capacitance value of the capacitor to be measured, and then voltage compensation is performed on the internal sensing line according to the compensation voltage corresponding to the capacitor to be measured.