Field Sequential Color Display Illumination Reduction Algorithm
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Field sequential color (FSC) displays face high power consumption due to the need for high-frequency updates to avoid image distortion, despite having advantages over traditional LCDs in power efficiency, as they do not use sub-pixels for color generation and have increased transmissivity.
Innovation Solution
Implementing an illumination reduction algorithm that determines the highest RGB or RGBW components of pixels and adjusts the illumination source accordingly, using a display controller to process pixels based on component factors, reducing power consumption by sequentially generating color components in a timed sequence and compensating for white components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency updates are used to avoid color break-up in FSC displays, then image quality is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic backlight control where the illumination source is adjusted in real-time based on the actual image content being displayed. The system analyzes frame data to determine which color components are present and adjusts backlight intensity dynamically, using higher intensity only when needed for specific colors while reducing intensity for other periods, thus resolving the contradiction between maintaining image quality and reducing power consumption
Solution Approach 2:
The system changes the operational parameters of the backlight by adjusting illumination intensity based on image content analysis. By modifying the backlight duty cycle and intensity levels according to which color components (RGB) are active in the displayed image, the system achieves both quality maintenance and power reduction
2Illumination intensity
If white light is converted to primary colors through color filters in traditional LCD displays, then color image is generated, but up to 70% of light is lost
Solution Approach 1:
The patent employs periodic illumination with sequential color field display, where the backlight illuminates in alternating color phases (red, green, blue) rather than continuous white light. This periodic action eliminates the need for color filters by matching the illumination color to the required pixel color at each moment, achieving near-100% light utilization efficiency
Solution Approach 2:
The system changes the color of the illumination source dynamically by switching between RGB LED colors in sequence. Instead of using white light and filtering, the backlight itself changes color to match the required pixel output, eliminating light loss through filtering while maintaining full color capability
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
Significantly reduces power consumption in FSC LCD panels by optimizing backlight unit power usage, especially in scenes with high content of specific LED colors, and allows for more efficient use of white LEDs, maintaining image quality while minimizing power usage.
Implementation Method 1
An illumination source illuminates pixels of a displayable image by sequentially generating RGB (red, green, blue) components of a pixel in a timed sequence of field sequential color
Data Source
AI summary
In embodiments of power saving field sequential color (FSC), an illumination source illuminates pixels of a displayable image by sequentially generating RGB (red, green, blue) components of a pixel in a timed sequence of field sequential color. The pixels of a displayable image may also include a white component derived from the RGB components. An illumination reduction algorithm is implemented to determine the highest RGB (or RGBW) components from any of the pixels of the displayable image. The highest RGB (or RGBW) components can be determined from any combination of the same or different pixels of the displayable image. The illumination reduction algorithm then divides each of the highest RGB (or RGBW) components by a maximum brightness value to generate respective RGB (or RGBW) component factors. A display controller then processes each pixel of the displayable image for display according to the RGB (or RGBW) component factors.