Cyclic Sub-pixel Arrangement for Display Luminance
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Solution Overview
Problem
High-resolution display devices face challenges in maintaining luminance while reducing power consumption, as higher resolution leads to decreased numerical aperture and increased backlight power consumption, particularly under outdoor daylight conditions.
Innovation Solution
A display device configuration that cyclically arrays first, second, third, and fourth sub-pixels with alternating signal and scan lines, allowing for increased effective aperture widths and luminance, particularly by positioning the fourth sub-pixel with higher luminance between adjacent scan lines, thereby optimizing pixel density and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel density is increased to achieve high resolution, then resolution is improved, but numerical aperture decreases and power consumption increases
Solution Approach 1:
The pixel array is segmented into four distinct columns, each dedicated to a specific sub-pixel type (first sub-pixel, second sub-pixel, third sub-pixel, and fourth sub-pixel with white pixel). This segmentation allows for optimized light extraction and aperture utilization in each column, improving overall luminance efficiency without increasing power consumption
Solution Approach 2:
Different sub-pixel types are strategically positioned in different columns to optimize local light emission characteristics. The fourth sub-pixel (white pixel) is placed in specific columns to enhance luminance in those regions, while other columns maintain color sub-pixels for color accuracy, creating locally optimized display quality throughout the array
2Measurement precision
If numerical aperture is decreased to achieve high resolution, then resolution is improved, but luminance decreases
Solution Approach 1:
The patent transitions from a conventional two-dimensional sub-pixel arrangement to a four-column cyclic arrangement that effectively utilizes the column dimension for optimizing aperture distribution. By organizing sub-pixels in four distinct columns with alternating patterns, the design maximizes the effective aperture width in the column direction while maintaining high pixel density, thereby improving luminance without sacrificing resolution
3Measurement precision
If pixel density is increased, then resolution is improved, but aperture width decreases
Solution Approach 1:
The patent employs an asymmetric four-column cyclic arrangement where each column is dedicated to a specific sub-pixel type, breaking the conventional symmetric red-green-blue sub-pixel grouping. This asymmetric arrangement allows for optimized aperture width in the column direction by strategically positioning sub-pixels to maximize light extraction area while maintaining high pixel density for improved resolution
Data Source
AI summary
In a display device, first and second sub pixels arranged in juxtaposition between adjacent scan lines are lined alternately in a column direction in at least one of first and third columns of sub pixels; at least one of third and fourth sub pixels is arranged between adjacent scan lines in at least one of second and fourth columns of sub pixels; the first, second, third, and fourth sub pixels are included in an identical row of pixels and the first, second, third, and fourth columns of sub pixels; and a first pixel that is in an identical row of pixels and includes sub pixels of the first and second columns includes a sub pixel not present in a second pixel that is adjacent to the first pixel in a row direction and is included in the third and fourth columns.