Display Driving Apparatus Color Shift Correction via Grayscale Mapping
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Solution Overview
Problem
Liquid crystal displays, particularly those in the vertical alignment mode, suffer from significant color shift issues due to the correlation between refractivity and wavelength, leading to decreased color garishness at low voltage drives, affecting the overall picture quality.
Innovation Solution
A driving method and apparatus that acquires target color systems with significant color shift, deletes low grayscales corresponding to color shift conditions, and uses high-bit drive semiconductor elements or frame ratio control to output signals, effectively improving color shift picture quality without sacrificing full grayscale resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage drive is reduced from high voltage to low voltage, then power consumption is reduced, but color purity and color garishness are significantly affected
Solution Approach 1:
The patent applies parameter changes by adjusting the grayscale mapping parameters specifically for colors prone to color shift. The system identifies target colors (R, G, B) that exhibit significant color shift and applies customized grayscale mapping tables to these colors while leaving other colors unchanged. This selective parameter adjustment resolves the contradiction by maintaining color purity for affected colors at low voltage drives without increasing overall power consumption.
2Reliability
If low grayscales are deleted to improve color shift, then color garishness is improved, but grayscale resolution is reduced
Solution Approach 1:
The patent applies local quality by implementing different grayscale mapping strategies for different colors. Specifically, target colors (R, G, B) that are prone to color shift are assigned customized grayscale mapping tables that delete low grayscales and improve color garishness, while non-target colors maintain their original grayscale mapping and resolution. This localized approach resolves the contradiction by improving color garishness only where necessary without sacrificing overall grayscale resolution.
3Reliability
If high-bit drive semiconductor element is used to maintain grayscale resolution, then device complexity increases, but color shift picture quality is improved
Solution Approach 1:
The patent applies parameter changes by utilizing high-bit drive semiconductor elements (10-bit or 12-bit) specifically for target colors that are prone to color shift, while other colors can be driven with lower bit depth. This selective high-bit driving approach improves color shift picture quality for affected colors without requiring the entire display system to use high-bit drive, thereby moderating the increase in device complexity.
Data Source
AI summary
This application discloses a driving method and a driving apparatus of a display device. The driving method comprises: acquiring a target color system which is to-be-adjusted, acquiring color shift grayscales corresponding to a color shift generated by the target color system, acquiring original grayscales corresponding to the target color system in an input signal, deleting a portion of color shift grayscales in the original grayscales, obtaining mapping grayscales corresponding to the target color system, adopting a high-bit drive semiconductor element or a frame ratio control, and outputting a signal of the mapping grayscales corresponding to the target color system.