Display Panel Driving Method for Lightness Uniformity
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Solution Overview
Problem
The increasing size and resolution of LCD TVs lead to significant manufacturing challenges and increased costs due to the two-sided drive method, which results in poor display effects and lightness differences across the display panel.
Innovation Solution
A driving method for a display panel that divides the panel into multiple charging regions with unique digital codes, using a timing control chip to output corresponding digital codes for gamma voltage generation, adjusting gamma voltages based on distance from the data driving chip to enhance lightness and reduce lightness differences, and utilizing a gamma voltage generation circuit to produce different voltages without altering the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If two-sided drive method is used to increase size and resolution, then display quality is improved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The display panel is divided into multiple charging regions along the data line direction, with each region assigned a unique digital code. This segmentation allows different gamma voltages to be applied to different regions, compensating for charging differences without requiring two-sided drive architecture.
Solution Approach 2:
Different gamma voltages are applied to different charging regions based on their distance from the data driving chip. Regions farther from the chip receive higher gamma voltages to compensate for greater voltage drops, achieving uniform display quality across the entire panel while using single-sided drive.
2Manufacturing precision
If two-sided drive method is used to increase size and resolution, then display quality is improved, but manufacturing cost increases significantly
Solution Approach 1:
The display panel is divided into multiple charging regions along the data line direction, with each region assigned a unique digital code. This segmentation allows different gamma voltages to be applied to different regions, compensating for charging differences without requiring two-sided drive architecture.
Solution Approach 2:
The gamma voltage parameter is dynamically adjusted based on the charging region's distance from the data driving chip. By changing the gamma voltage parameter rather than the physical circuit structure, the system achieves uniform display quality while avoiding the high costs associated with two-sided drive implementation.
3Illumination intensity
If gamma voltage is increased for distant charging areas, then lightness uniformity is improved, but voltage difference across panel increases
Solution Approach 1:
Different gamma voltages are applied to different charging regions based on their distance from the data driving chip. Regions farther from the chip receive higher gamma voltages to compensate for greater voltage drops, achieving uniform display quality across the entire panel while using single-sided drive.
Solution Approach 2:
The system uses pre-stored correspondence between charging area information and digital codes to determine the appropriate gamma voltage for each region. This feedback mechanism ensures that the voltage compensation is precisely matched to the actual charging needs of each region, achieving lightness uniformity without excessive voltage differences.
Data Source
AI summary
The present application discloses a driving method and a drive circuit of a display panel. The driving method includes the following steps: according to the distance from the data driving chip, the display panel is divided into a plurality of charging regions in advance, each charging area is provided with a unique digital code, and the corresponding information of the charging area and the digital code is stored in the timing control chip in advance; detecting a charging area where the pixel to be charged is located, and outputting a corresponding digital code according to the charging area by a timing control chip; the gamma chip receives the digital code and generates a gamma voltage corresponding to the digital code according to the input operating voltage to drive charging operation of the charging area corresponding to the digital code.