Reverse Gain Circuit for LCD Voltage Stabilization
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Solution Overview
Problem
LCD panels experience lateral crosstalk due to voltage variations in the common and storage capacitor electrodes, which affect display quality.
Innovation Solution
Incorporating a reverse gain circuit connected to the storage capacitor electrode, which outputs a reverse gain voltage signal to compensate for voltage variations in the common electrode, and vice versa, to stabilize the voltage levels and reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage signals are written into the pixel electrode through the data line, then the image voltage signal can be displayed, but voltage variations are generated in the storage capacitor electrode and common electrode through capacitance coupling, causing lateral crosstalk
Solution Approach 1:
The patent applies preliminary anti-action by introducing a compensation voltage signal in advance to counteract the harmful voltage variations caused by capacitance coupling. The compensation signal is generated based on the detected voltage variations and is applied to the common electrode before the crosstalk fully manifests, thereby preventing the degradation of display quality.
Solution Approach 2:
The patent implements feedback by detecting the voltage variations in the storage capacitor electrode and common electrode through capacitance coupling during the writing process, and using this detected information to generate a compensation voltage signal. This closed-loop feedback mechanism continuously adjusts the compensation signal to counteract the harmful effects of lateral crosstalk.
2Stability of the object's composition
If the storage capacitor electrode and common electrode are maintained at constant voltage levels, then stable display performance is achieved, but voltage variations occur during the writing process due to capacitance coupling with the data line
Solution Approach 1:
The patent applies preliminary action by proactively generating and applying compensation voltage signals during the writing process to prevent voltage variations. Instead of waiting for the voltage instability to occur, the system detects the capacitance coupling effects and applies compensatory signals in advance to maintain stable voltage levels in the storage capacitor electrode and common electrode.
Solution Approach 2:
The patent uses feedback to maintain voltage stability by continuously monitoring the voltage levels in the storage capacitor electrode and common electrode during the writing process. Based on this real-time feedback, the system adjusts the compensation voltage signal to counteract any deviations, thereby maintaining stable voltage levels and ensuring reliable display performance.
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 reverse gain circuit effectively compensates for voltage variations in both the common and storage capacitor electrodes, thereby improving the lateral crosstalk issue and enhancing display performance.
Implementation Method 1
The voltage change of the data line Di can make the pixel electrode 112, the storage capacitor electrode 12 and the common electrode 13 generate voltage variation through the capacitance coupling effect.
Data Source
AI summary
A liquid crystal display (LCD) panel includes a first substrate, a second substrate, a common electrode driving circuit and a reverse gain circuit. A storage capacitor electrode is disposed on the first substrate. A common electrode is disposed on the second substrate which is disposed oppositely to the first substrate. The common electrode driving circuit is electrically connected with the common electrode and outputs a common voltage level signal to the common electrode. The reverse gain circuit is electrically connected to the storage capacitor electrode through a connecting terminal and outputs a reverse gain voltage signal to the common electrode according to a voltage signal of the storage capacitor electrode.