Display Device Sub-Pixel Arrangement and Column Inversion Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with increased resolution face challenges in reducing power consumption while maintaining high luminance and preventing deterioration in display quality due to the addition of a fourth sub-pixel, which can lead to increased pixel area and crosstalk issues.
Innovation Solution
A display device with an image display panel featuring alternately arranged third and fourth sub-pixels in specified columns, utilizing column inversion driving to apply voltages of the same or opposite polarity to adjacent signal lines, and inverting polarities at predetermined cycles to minimize power consumption and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a fourth sub-pixel is added to enhance luminance, then power consumption of backlight is reduced, but pixel area increases leading to deterioration in display quality
Solution Approach 1:
The pixel array is segmented into first pixel regions with three sub-pixels and second pixel regions with four sub-pixels. This segmentation allows different driving methods to be applied to different regions, enabling the fourth sub-pixel to be used for luminance enhancement in specific areas without requiring all pixels to have the same area, thus preventing display quality deterioration while maintaining power consumption benefits
Solution Approach 2:
The fourth sub-pixel is selectively arranged in specific columns (every other column) rather than uniformly across all pixels. This local quality approach allows luminance enhancement to be applied where needed while maintaining original three-sub-pixel configuration in other areas, preventing crosstalk and maintaining display quality in regions where the fourth sub-pixel is not present
2Use of energy by moving object
If column inversion driving is applied to suppress power consumption, then power consumption is reduced, but crosstalk occurs in display quality
Solution Approach 1:
Different voltage polarity patterns are applied to different column groups. Specifically, in columns where the fourth sub-pixel is present, a modified column inversion driving method is used that applies different voltage polarities to the fourth sub-pixel compared to the third sub-pixel. This local differentiation prevents crosstalk between adjacent sub-pixels while maintaining the power consumption benefits of column inversion driving
Solution Approach 2:
The column inversion driving is segmented into different patterns for different column groups. First column groups use one inversion pattern while second column groups use another pattern, allowing the system to suppress power consumption through inversion while avoiding crosstalk by using appropriate patterns in specific locations
Data Source
AI summary
A display device includes an image display panel and a control device. The image display panel includes first sub-pixels, second sub-pixels, third sub-pixels, and fourth sub-pixels in which a specified sub-pixel column including the third sub-pixels and the fourth sub-pixels and at least one other sub-pixel column arranged next to the specified sub-pixel column are periodically arranged. The control device performs column inversion driving to apply a voltage having the same polarity to signal lines of a first specified sub-pixel column belonging to the specified sub-pixel columns and the other sub-pixel column adjacent to the first specified sub-pixel column, apply a voltage having the same polarity as the first specified sub-pixel column to one of the signal lines of a second specified sub-pixel column and a third specified sub-pixel column adjacent to the first specified sub-pixel column, and invert the polarities of the voltages to be applied at predetermined cycles.