Display Panel Driving Method for Viewing-Angle Color Shift
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Solution Overview
Problem
Current large-size LCD display panels using negative type vertical alignment (VA) liquid crystal technology suffer from significant viewing-angle color shift and brightness saturation, leading to poor picture quality contrast at large viewing angles compared to front-view quality.
Innovation Solution
A driving method for display panels divides pixels into pairs of sets with different color sub-pixels, applying alternating high and low voltage signals to each set in alternating frames to achieve equivalent viewing-angle brightness, improving color difference and maintaining frame resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If VA type liquid crystal technology is used to drive large-size display panels, then production efficiency and manufacturing cost are improved, but viewing-angle color shift and brightness saturation occur at large viewing angles
Solution Approach 1:
The display panel is divided into a first display region and a second display region, with different driving methods applied to each region. The first region uses conventional driving while the second region uses the compensated driving method with adjusted voltage signals, allowing the viewing angle compensation function to be segmented and applied only where needed.
Solution Approach 2:
Different driving parameters are applied to different regions of the display panel. The second display region uses adjusted voltage signals with modified duty cycles or amplitudes specifically tailored to compensate for viewing angle effects in that local area, while the first region maintains standard driving parameters.
2Device complexity
If uniform voltage signals are applied to all pixels, then device complexity is reduced, but viewing-angle brightness uniformity deteriorates
Solution Approach 1:
The pixel array is segmented into multiple groups corresponding to different display regions, with each group receiving tailored voltage signals. This segmentation allows different voltage parameters to be applied to different regions, improving brightness uniformity across viewing angles while maintaining manageable system complexity through regional rather than pixel-level individualization.
Solution Approach 2:
The voltage signal parameters (amplitude, duty cycle, or both) are changed specifically for pixels in the second display region to compensate for viewing angle effects. By adjusting these electrical parameters regionally, the patent achieves improved brightness uniformity without requiring complete redesign of the driving system.
3Illumination intensity
If viewing angle compensation is implemented across the entire panel, then brightness uniformity is improved, but manufacturing precision requirements increase
Solution Approach 1:
By dividing the panel into regions rather than applying compensation to every pixel individually, the patent reduces the precision requirements for pixel-level operations. The regional approach allows for more tolerant manufacturing processes while still achieving effective viewing angle compensation in the second display region.
Solution Approach 2:
The viewing angle compensation is applied locally to the second display region rather than uniformly across the entire panel. This localized approach reduces the overall manufacturing precision requirements by concentrating the compensation function in a specific area, allowing standard manufacturing tolerances to be maintained in the first region.
Data Source
AI summary
A driving method of a display panel, comprising: dividing pixels into a plurality of pairs of pixel sets comprising a first pixel set and a second pixel set comprising different color sub-pixels; acquiring a first voltage signal and a second voltage signal, wherein the frame comprises a first frame and a second frame at neighboring timings; adopting the first voltage signals to drive the color sub-pixels of the first pixel set, and adopting the second voltage signals to drive the color sub-pixels of the second pixel set upon displaying the first frame; and adopting the second voltage signals to drive the color sub-pixels of the first pixel set, and adopting the first voltage signals to drive the color sub-pixels of the second pixel set upon displaying the second frame.