Display Device Driving Method for VA LCD Viewing Angle Color Shift
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Solution Overview
Problem
Large-size LCD display panels using VA-type liquid crystal technology face challenges with viewing angle color shift, which affects market application requirements and increases manufacturing costs due to the need for secondary pixels and additional metal layout or thin film transistor elements, reducing light penetration and increasing backlight module costs.
Innovation Solution
The method involves dividing sub-pixels into array blocks and selecting one as a luminous pixel, calculating a first brightness signal using pre-set driving signals from a look-up table, and using this signal to drive the luminous pixel while using pixel signals for other sub-pixels, eliminating the need for primary and secondary pixels and simplifying production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If VA-type liquid crystal technology is used to achieve high production efficiency and low manufacturing cost, then production efficiency and manufacturing cost are improved, but viewing angle color shift occurs affecting display quality
Solution Approach 1:
The patent changes the driving voltage parameters applied to different sub-pixels within the same physical pixel. By applying different voltages to primary and secondary pixels, the liquid crystal molecules are oriented differently to compensate for viewing angle color shift, allowing VA-type technology to achieve both high efficiency and good display quality
2Manufacturing precision
If secondary pixels are added to solve viewing angle color shift, then display quality is improved, but light-permeable opening area is reduced
Solution Approach 1:
The patent makes all sub-pixels within a pixel share the same physical structure and light-permeable opening, eliminating the need for separate primary and secondary pixel structures. The multi-functionality is achieved by using different driving voltages on identical physical structures to produce different optical effects, thereby maintaining full light permeability while solving viewing angle color shift
3Manufacturing precision
If additional metal layout or thin film transistor elements are designed to drive secondary pixels, then viewing angle color shift is corrected, but device complexity increases
Solution Approach 1:
The patent merges the driving functions for primary and secondary pixels into a single unified pixel structure. Instead of having separate metal layouts and thin film transistors for primary and secondary pixels, the invention combines them so that one pixel contains multiple sub-pixels (primary and secondary) that share common structural elements, thereby reducing device complexity while maintaining the ability to correct viewing angle color shift through differential voltage application
Data Source
AI summary
A display device and a method and device of driving a display device are provided. The method includes: dividing sub-pixels of a display panel into a plurality of array blocks, and selecting at least one of the sub-pixels in the blocks as a luminous pixel; receiving a to-be-displayed image, acquiring a pixel signal of a pixel of the display panel, obtaining the pixel signal from a look-up table, and obtaining first driving signals of the sub-pixels of each of the pixels; calculating a first brightness signal of driving the luminous pixel in the array block according to the first driving signals of the sub-pixels in the same array blocks; and using the first brightness signal to drive the luminous pixel, and using the pixel signal to drive other ones of the sub-pixels.