Field-Sequential Display Subpixel Segmentation for Color Breakup Reduction
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Solution Overview
Problem
Field-sequential liquid crystal display panels face limitations in write period and response period, leading to potential color breakup and reduced image quality due to the need for higher frame rates and longer sub-field periods.
Innovation Solution
A display device configuration with a light source emitting three primary colors, where each pixel includes a first sub-pixel for one color and an adjacent second sub-pixel for a complementary color, allowing simultaneous light emission during specific sub-field periods to optimize write and response times, thereby easing the limitations on frame rate and response period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If field-sequential liquid crystal display panel uses multiple sub-field periods to display color images, then color expression capability is improved, but write period and response period become insufficient leading to color breakup
Solution Approach 1:
The pixel is divided into multiple sub-pixels with different color filters (e.g., red, green, blue sub-pixels). Each sub-pixel can be independently controlled during different sub-field periods, allowing the display to show different colors at different times while maintaining sufficient write and response time for each sub-pixel. This segmentation enables color field-sequential display without compromising the timing requirements.
Solution Approach 2:
The display operates by periodically switching between different color sub-fields within each frame period. Each sub-field period displays a specific color combination, and this periodic switching continues through multiple sub-field periods. This periodic action allows the liquid crystal to fully respond and stabilize during each sub-field while maintaining the overall frame rate and color expression capability.
2Manufacturing precision
If field-sequential system displays different colors in time-division manner, then higher definition is achieved, but color breakup phenomenon occurs
Solution Approach 1:
Each pixel is segmented into multiple sub-pixels with specific color filters. By controlling each sub-pixel independently during different sub-field periods, the system achieves high definition through precise spatial control while minimizing color breakup through optimized temporal control of each segment.
Solution Approach 2:
The system changes the timing parameters and color combinations displayed during different sub-field periods. By carefully adjusting the duration and sequence of sub-field periods, and by selecting appropriate color filter combinations in sub-pixels, the system maintains high definition while reducing color breakup through optimized parameter control.
3Reliability
If frame rate is increased to reduce color breakup, then image quality improves, but write period and response period become even more limited
Solution Approach 1:
By segmenting the pixel into multiple sub-pixels, the system can distribute the display task across multiple sub-field periods. Each sub-pixel group can be updated independently with sufficient time, allowing high frame rates without compromising the write and response period requirements for each segment.
Solution Approach 2:
While one group of sub-pixels is being written and responding during a sub-field period, other sub-pixel groups can be prepared or are displaying. This continuous utilization of different sub-pixel groups maintains high effective frame rate while ensuring each group receives adequate write and response time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances image quality by reducing color breakup and improving the apparent resolution of less luminous colors, maintaining high luminance while minimizing flicker visibility.
Implementation Method 1
a first light emitter configured to emit light in the first color; a second light emitter configured to emit light in the second color; and a third light emitter configured to emit light in the third color
Implementation Method 2
a first sub-pixel including a color filter for a first color; a second sub-pixel that is arranged adjacent to the first sub-pixel in the first direction and includes a color filter for a complementary color between a second color and a third color
Data Source
AI summary
A display device includes: a display panel with pixels arranged in a first direction and a second direction; and a light source. Each pixel includes: a first sub-pixel including a color filter for a first color; and a second sub-pixel arranged adjacent to the first sub-pixel in the first direction and including a color filter for a complementary color between a second color and a third color. The light source includes: a first light emitter configured to emit light in the first color; a second light emitter configured to emit light in the second color; and a third light emitter configured to emit light in the third color. One frame period includes: a first light emission period of causing the first and second light emitters to emit light simultaneously; and a second light emission period of causing the first and third light emitters to emit light simultaneously.