Display Panel Driving Apparatus Pixel Voltage Compensation
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Solution Overview
Problem
The existing technologies fail to effectively address the voltage differences among pixels in display panels caused by coupling capacitance between adjacent pixels, which affects imaging quality, especially in phase modulation applications where these differences can be significant.
Innovation Solution
A display panel driving apparatus and method that includes a timing control circuit, memory, and compensation circuit to provide and use coupling-capacitance information between pixels, compensating pixel data to offset voltage differences caused by adjacent pixels, thereby improving imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the distance between adjacent pixels is decreased, then the pixel density and resolution are improved, but the coupling capacitance between adjacent pixels increases causing voltage differences among pixels
Solution Approach 1:
The patent applies preliminary action by calculating and storing compensation values in advance based on pixel positions and coupling capacitance characteristics. The compensation values are pre-computed and stored in a lookup table, allowing the display device to quickly apply voltage compensation without real-time calculation delays, thus maintaining voltage uniformity even when pixels are closely spaced
Solution Approach 2:
The patent changes the voltage parameter by applying compensation voltages to adjacent pixels based on their coupling capacitance characteristics. The compensation circuit adjusts the voltage applied to each pixel dynamically, taking into account the coupling capacitance with neighboring pixels, thereby maintaining voltage uniformity across the display panel even when pixel density is increased
2Quantity of substance
If coupling capacitance between adjacent pixels is increased, then the pixel integration density is improved, but the voltage difference among pixels becomes more significant affecting imaging quality
Solution Approach 1:
The patent implements feedback by using the stored coupling capacitance information to calculate compensation values that are fed back into the pixel driving circuit. The system continuously adjusts the voltage applied to each pixel based on the coupling capacitance feedback from adjacent pixels, ensuring voltage uniformity is maintained even as pixel integration density increases
Solution Approach 2:
The patent dynamically changes the voltage parameter applied to each pixel based on its coupling capacitance with adjacent pixels. By adjusting the voltage parameter in real-time according to the coupling capacitance characteristics, the system maintains voltage uniformity across the display panel while supporting high pixel integration density
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 voltage differences among pixels by compensating for coupling voltages, enhancing the uniformity of gray levels and overall imaging quality in display panels.
Implementation Method 1
there must be coupling capacitance existing between adjacent pixels. The coupling capacitance may cause the voltage difference to the pixels
Data Source
AI summary
A display panel driving apparatus and method are provided. The display panel driving apparatus includes a timing control circuit, a memory, a compensation circuit and a data driving circuit. The memory provides at least one coupling-capacitance information between a current pixel and at least one adjacent pixel in a display panel. By using the coupling-capacitance information, the compensation circuit compensates the current pixel data to obtain the compensated pixel data for compensating the voltage offset of the current pixel caused by the coupling voltage of the adjacent pixel. The data driving circuit drives the current pixel according to the compensated pixel data.