Display Device Using Hue Circle Color Sequencing to Reduce Flicker
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Solution Overview
Problem
Time-division field sequential color (FSC) display devices experience flicker and color breakup due to the arrangement of colors in display output periods, particularly when mixed colors like yellow, cyan, and magenta are included alongside primary colors red, green, and blue, leading to image flicker.
Innovation Solution
A display device with a display panel and light sources emitting primary colors, where a frame period is divided into multiple subframe periods, with color reproduction achieved through a combination of colors output in these subframe periods, and the order of colors follows a clockwise or counterclockwise direction in a hue circle, reducing color breakup and flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mixed colors (yellow, cyan, magenta) are included in display output periods alongside primary colors, then color reproduction capability is improved, but image flicker occurs due to color arrangement issues
Solution Approach 1:
The frame period is divided into multiple subframe periods, with each subframe dedicated to displaying a specific color component. This segmentation allows independent control of each color's display timing and duration, enabling smooth transitions between colors while maintaining complete color reproduction capability through the combination of all subframes.
Solution Approach 2:
The display device employs periodic emission of light from light sources corresponding to different colors in sequential subframes. By controlling the timing and duration of light emission in a periodic manner across subframes, the system achieves continuous color reproduction while eliminating flicker through proper synchronization and duration control of each color component.
2Manufacturing precision
If multiple light sources emitting primary colors are used, then color reproduction accuracy is improved, but device complexity increases
Solution Approach 1:
Multiple light sources emitting different primary colors are spatially combined and directed toward the same display panel. The optical paths of these light sources are merged through optical elements such as lenses or mirrors, allowing simultaneous or sequential illumination of the display panel with multiple colors without requiring separate display structures for each light source.
Solution Approach 2:
The system transitions from spatial color representation to temporal color representation by displaying different color components in sequential subframes rather than simultaneously. This dimensional change from space to time allows multiple light sources to be used without proportionally increasing device complexity, as the colors are combined through time-division multiplexing rather than requiring complex spatial arrangement.
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
The solution effectively reduces the occurrence of flicker and color breakup by smoothly transitioning colors between subframe periods, enhancing image stability and clarity.
Implementation Method 1
a first light source configured to emit light in a first primary color, a second light source configured to emit light in a second primary color, and a third light source configured to emit light in a third primary color
Data Source
AI summary
According to an aspect, a display device includes a display panel configured to display an image; and a light source configured to emit light to the display panel. The light source includes a first light source configured to emit light in a first primary color, a second light source configured to emit light in a second primary color, and a third light source configured to emit light in a third primary color. A frame period that is a display period of one frame image includes a predetermined number of subframe periods, the predetermined number is four or greater, and color reproduction of the one frame image is performed by a combination of colors that are output in the predetermined number of subframe periods. An output order of colors of the subframe periods is an order of colors in a clockwise direction or in a counterclockwise direction in a hue circle.