Dynamic Brightness Scaling for Display Power Management
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Solution Overview
Problem
Electronic display systems, such as laser phosphor displays and OLEDs, face challenges in reducing power consumption when displaying bright images, as they often exceed available power limits, leading to costly upgrades or compromised image quality.
Innovation Solution
A method of dynamically controlling the power consumption and brightness of electronic display devices by uniformly scaling down image brightness based on predefined settings, using average power level calculations and APL mapping functions to adjust laser sources and subpixel intensities, ensuring operation within a predetermined maximum power level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display system operates at full power to maintain image quality, then brightness and image quality are improved, but power consumption exceeds available power limits
Solution Approach 1:
The patent implements dynamic brightness adjustment by calculating the average power level (APL) of incoming image data and uniformly scaling pixel intensities to ensure the display operates within available power limits. The system continuously adapts brightness based on real-time power constraints rather than operating at fixed full power, resolving the contradiction between maintaining brightness and limiting power consumption.
Solution Approach 2:
The system changes the brightness parameter dynamically by applying a scaling factor to pixel intensities based on the calculated APL. When power consumption would exceed limits, the system reduces the brightness parameter uniformly across the display, allowing operation within power constraints while preserving relative image quality and contrast.
2Power
If the power supply is upgraded to support higher power consumption, then available power increases, but system cost increases
Solution Approach 1:
The display system performs self-regulation of power consumption by automatically calculating APL and adjusting brightness to operate within the constraints of the existing power supply. This eliminates the need for expensive power supply upgrades, as the system adapts to and optimizes for the available power infrastructure already in place.
3Use of energy by moving object
If the system is recalibrated to a lower maximum power level, then power consumption is reduced, but image quality and dynamic range deteriorate
Solution Approach 1:
Rather than static recalibration to a lower power level, the system dynamically adjusts brightness on a per-frame or per-scene basis based on calculated APL. This allows the display to maintain full brightness and dynamic range when power is available (for darker scenes) while automatically reducing brightness only when necessary to stay within power limits, preserving image quality whenever possible.
Data Source
AI summary
An image is displayed on an electronic display device at a reduced power level. Power used by the display device is maintained below a predetermined maximum power level by uniformly scaling the initial optical intensity of an image to a lower optical intensity whenever displaying the image at the initial optical intensity would result in power consumption of the display device exceeding the predetermined maximum power level.