Multi-Mode Display Optimizing Brightness and Power Efficiency
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Solution Overview
Problem
Color-sequential displays face a loss in brightness and optical efficiency due to each color being on for only a fraction of the total frame time, limiting their performance in applications requiring high brightness and power efficiency.
Innovation Solution
A multi-mode display system that operates in various modes, including full color RGB and reduced color space (RCS) modes, allowing for adjustment of light sources, duty cycles, power levels, and combinations to optimize brightness and power efficiency based on environmental and usage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If color-sequential display operates with each color on for a fraction of total frame time, then color display capability is achieved, but brightness and optical efficiency are reduced
Solution Approach 1:
The display system dynamically switches between different operating modes (color-sequential and non-color-sequential) based on environmental conditions and usage requirements. The controller adjusts the duty cycle of light sources and modulates display parameters in real-time to optimize both brightness and color performance for different scenarios such as daytime outdoor use versus nighttime indoor use.
Solution Approach 2:
The system changes operational parameters including light source duty cycle, illumination intensity, and display refresh rate depending on the operating mode. In non-color-sequential mode, the duty cycle is increased to improve brightness, while in color-sequential mode, the duty cycle is adjusted to maintain color accuracy, thereby resolving the contradiction between brightness and color performance.
2Illumination intensity
If multi-mode display system adjusts light sources and duty cycles for optimized brightness, then brightness performance is improved, but power consumption increases
Solution Approach 1:
The controller dynamically adjusts the duty cycle of light sources based on the selected operating mode and environmental conditions. In high-brightness modes, the duty cycle is increased to improve visibility, while in power-saving modes, the duty cycle is reduced to lower power consumption. This dynamic parameter adjustment resolves the contradiction between brightness and power consumption by optimizing the duty cycle for each specific operating scenario.
Solution Approach 2:
The display system employs dynamic power management that adjusts illumination intensity and light source activation based on real-time conditions. The controller monitors environmental factors and usage patterns to dynamically switch between power-efficient configurations and high-brightness configurations, ensuring optimal power consumption for each operational context.
3Illumination intensity
If display operates in reduced color space mode for improved brightness, then brightness and power efficiency are enhanced, but color space coverage is reduced
Solution Approach 1:
The display system dynamically switches between full color space mode and reduced color space mode based on environmental conditions and usage requirements. The controller adjusts the operational mode in real-time, enabling the display to provide full color gamut when color accuracy is prioritized and reduced color space when brightness and power efficiency are more important, thereby resolving the contradiction between color space coverage and brightness performance.
Solution Approach 2:
The system changes the operational parameters including which light sources are activated and their respective duty cycles depending on the selected mode. In reduced color space mode, specific light sources may be deactivated or operated at lower duty cycles to improve brightness and reduce power consumption, while in full color mode, all light sources operate to provide complete color gamut coverage.
Data Source
AI summary
A multi-mode display includes a mode selector to select one of a plurality of modes, each of the modes having a different light configuration, wherein one mode comprises a reduced color space mode, and one or more light sources controlled by the mode selector, the one or more light sources used to display content to a user with the multi-mode display.