Common Voltage Compensator for Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience image failures due to common voltage distortion caused by coupling phenomena between common voltage lines and adjacent signal lines, leading to non-uniform charging characteristics and issues like horizontal crosstalk.
Innovation Solution
A display device with a common voltage compensator that applies a compensation common voltage, calculated based on feedback and reference common voltages, to mitigate the distortion and ensure uniform charging across sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If common voltage lines are disposed adjacent to data lines to supply common voltage to all sub-pixels, then the common voltage can be efficiently distributed, but coupling phenomenon occurs causing common voltage distortion and image failures
Solution Approach 1:
The patent implements a feedback mechanism where the actual common voltage applied to the display panel is sensed and fed back to a controller. The controller compares the feedback voltage with a reference voltage and generates a compensation voltage to correct any distortion caused by coupling phenomena, ensuring uniform voltage distribution across all sub-pixels
Solution Approach 2:
The patent dynamically adjusts the common voltage parameter by adding a compensation voltage to the reference common voltage. This parameter change compensates for the voltage distortion caused by coupling phenomena, transforming the distorted voltage into a uniform voltage suitable for driving all sub-pixels
2Speed
If rapid voltage changes are applied through data lines to update display content, then the display can respond quickly to new images, but coupling phenomenon causes non-uniform capacitor charging and horizontal crosstalk
Solution Approach 1:
The feedback mechanism senses the actual common voltage during rapid voltage changes and generates real-time compensation to maintain uniform capacitor charging across all sub-pixels, preventing horizontal crosstalk even during fast transitions
Solution Approach 2:
The compensation voltage is generated in advance based on the reference voltage before the actual voltage application, preemptively counteracting the coupling effect that would otherwise cause non-uniform charging and image failures
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 common voltage distortion, improving image quality by ensuring consistent voltage application across sub-pixels, thereby preventing image failures such as horizontal crosstalk.
Implementation Method 1
a common voltage compensator for applying a compensation common voltage obtained by compensating for the common voltage based on a feedback common voltage, which is feedback of a common voltage applied to the display panel through the common voltage lines
Data Source
AI summary
The present disclosure provides a display device and a method for driving the same, which reduce or prevent a common voltage distortion phenomenon caused by a coupling phenomenon and thereby improve image quality.