Display Compensation Circuit With Threshold-Based Voltage Switching
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Solution Overview
Problem
Existing display technologies consume excessive power when addressing mild display problems in display panels due to the continuous use of common-voltage compensation methods, despite the display issues being of a relatively mild degree.
Innovation Solution
A compensation circuit is introduced with a power management circuit, switch circuit, and operational amplifier circuit that dynamically adjusts voltage output based on feedback voltage thresholds and PDF signal levels, selectively applying common-voltage or polarity inversion methods to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the common-voltage compensation method is continuously used to address display problems, then the display problem compensation accuracy is improved, but the power consumption of the compensation circuit increases
Solution Approach 1:
The patent implements dynamic switching between common-voltage compensation method and polarity inversion method based on the severity of display problems. The timing controller dynamically adjusts the compensation strategy by detecting display problem severity and controlling the switch circuit to select appropriate compensation methods, avoiding continuous use of the high-power common-voltage method.
Solution Approach 2:
The patent changes the compensation parameter (compensation method type) based on display problem severity. When display problems are mild, the polarity inversion method is used; when problems are severe, the common-voltage compensation method is activated. This parameter change optimizes power consumption while maintaining compensation accuracy.
2Reliability
If the common-voltage compensation method is used for mild display problems, then the display quality is improved, but unnecessary power consumption occurs
Solution Approach 1:
The patent uses feedback from the timing controller to detect display problem severity and provides feedback control signals to the switch circuit. This feedback mechanism ensures that the common-voltage compensation method is only activated when truly necessary, avoiding unnecessary power consumption while maintaining display quality.
Solution Approach 2:
The switch circuit acts as an intermediary between the timing controller and the compensation methods. It receives control signals from the timing controller and selectively connects the appropriate compensation method to the display panel, enabling intelligent power management based on actual display needs.
Data Source
AI summary
A compensation circuit, including: a power management circuit and a switch circuit. The switch circuit is connected to a display panel and an operational amplifier circuit connected to the display panel. In case that a feedback voltage is greater than or equal to a target threshold, the switch circuit outputs a common voltage and an operating voltage to the operational amplifier circuit and stops outputting the common voltage to the display panel; and the operational amplifier circuit receives the common voltage and the operating voltage and outputs a compensation voltage to the display panel. In case that the feedback voltage is smaller than the target threshold, the switch circuit outputs the common voltage to the display panel and stops outputting the common voltage and the operating voltage to the operational amplifier circuit; and the operational amplifier circuit stops receiving the feedback voltage and stops outputting the compensation voltage.