Liquid Crystal Display Driving Method for Large Viewing Angle Color Shift
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices experience significant color shifts at large viewing angles due to differences in brightness between front-viewing and side-viewing angles, particularly for red, green, and blue color systems, which existing methods attempt to alleviate by subdividing sub-pixels and adjusting driving voltages, but this increases production costs and complexity.
Innovation Solution
A driving method for liquid crystal display devices that calculates average gray-scale values and determines color saturation and hue in the LCH color space to adjust backlight sources and gray-scale values, allowing for increased brightness and reduced color shift without additional wiring or increased costs, by dividing the display into independent areas and adjusting light sources or gray-scale values based on calculated parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sub-pixels are subdivided into primary and secondary pixels with different driving voltages, then large-viewing angle color shift is alleviated, but quantities of metal wires and driving devices need to be doubled, affecting transmittance and aperture ratio and increasing production costs
Solution Approach 1:
The display panel is divided into multiple display areas, and each display area is further divided into multiple pixel blocks. This segmentation allows independent control of different regions, enabling color shift compensation without requiring additional wiring across the entire panel. The segmented approach reduces the complexity of metal wires and driving devices while effectively addressing large-viewing angle color shift.
Solution Approach 2:
Different gray-scale values are applied to different pixel blocks within the same display area based on their specific color characteristics. This local quality adjustment allows each region to be optimized independently, compensating for color shift in each area without requiring a complete redesign of the overall display structure, thereby reducing the need for additional metal wires and driving devices.
2Object-affected harmful factors
If sub-pixels are subdivided into primary and secondary pixels with different driving voltages, then large-viewing angle color shift is alleviated, but transmittance and aperture ratio are affected
Solution Approach 1:
By segmenting the display into multiple areas and pixel blocks, the patent reduces the need for additional metal wires and driving devices across the entire panel. This segmentation minimizes the impact on aperture ratio while still achieving color shift compensation through localized gray-scale adjustments.
Solution Approach 2:
The patent changes the gray-scale parameters of existing pixel blocks rather than adding new hardware components. By adjusting gray-scale values software-controlled, the solution compensates for color shift without requiring additional physical structures that would reduce transmittance and aperture ratio.
3Object-affected harmful factors
If sub-pixels are subdivided into primary and secondary pixels with different driving voltages, then large-viewing angle color shift is alleviated, but production costs increase
Solution Approach 1:
The segmentation approach allows the use of existing manufacturing processes and materials without requiring additional expensive components. By dividing the display into manageable pixel blocks, the patent enables cost-effective implementation of color shift compensation using standard production techniques.
Solution Approach 2:
The patent achieves color shift compensation through software-controlled gray-scale parameter adjustments rather than hardware modifications. This parameter-based approach eliminates the need for additional expensive metal wires, driving devices, and manufacturing steps, thereby reducing production costs while effectively addressing large-viewing angle color shift.
Data Source
AI summary
This application relates to a driving method for a display device. Turn-on/turn off of a color light source corresponding to a minimum average value in a time period of displaying a second gray-scale data group is controlled according to the determining of whether a color saturation value C falls within a specified range of a color saturation value of a display area.