Dynamic Display Color Correction Across the Brightness Range
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Solution Overview
Problem
Achieving uniform color across a display, particularly in waveguide-based extended reality (XR) systems, is challenging due to variations in optical out-coupling efficiency and geometric design, leading to non-uniformity in light emission across different wavelengths.
Innovation Solution
A display system that dynamically adjusts color uniformity correction in response to changes in brightness, applying minimal correction at high brightness levels and increasing correction at low brightness levels, with individual adjustment of color uniformity scaling factors for each color channel and fine-tuning illumination time, optimizing display performance across various brightness levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If color uniformity correction is applied across all brightness levels, then color uniformity is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic color uniformity correction by adjusting the magnitude of correction based on the current brightness level of the display. At lower brightness levels, a larger magnitude of correction is applied to compensate for greater color non-uniformity, while at higher brightness levels, a smaller magnitude of correction is applied. This dynamic adjustment resolves the contradiction by optimizing the balance between color uniformity improvement and energy consumption across different operating conditions.
2Manufacturing precision
If color uniformity correction magnitude is increased, then color uniformity is improved, but brightness range is reduced
Solution Approach 1:
The patent changes the parameter of correction magnitude dynamically based on brightness level. By adjusting the correction magnitude as a variable parameter rather than applying a fixed correction, the system maintains color uniformity across the full brightness range. This resolves the contradiction by allowing high correction at low brightness and minimal correction at high brightness, preserving the entire brightness range while maintaining color uniformity where it is most needed.
3Manufacturing precision
If color uniformity correction is applied, then visual uniformity is improved, but battery life is impacted
Solution Approach 1:
The patent applies partial correction by adjusting the magnitude of color uniformity correction based on brightness level. Instead of applying full correction at all times, the system applies a larger magnitude of correction only when necessary (at lower brightness levels) and reduces or eliminates correction at higher brightness levels where color non-uniformity is less perceptible. This partial action approach resolves the contradiction by providing sufficient visual uniformity improvement while minimizing the impact on battery life.
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
Enhances visual uniformity and extends brightness range while minimizing impact on battery life, providing an improved user experience under diverse operating conditions.
Implementation Method 1
Light-emitting diode (LED) technology is used in modern display systems due to its efficiency, longevity, and the quality of light it can produce. LEDs are semiconductor devices that emit light when an electrical current passes through them.
Implementation Method 2
Waveguides are optical components that guide light from the LED backlight or other light source to the viewer's eye.
Data Source
AI summary
A display system for color correcting a display. An emitter of the display is configured to receive an electrical stimulus having a magnitude, and emit an amount of light that increases with increased magnitude of the electrical stimulus. A display controller is configured to apply an amount of color non-uniformity correction to the display to adjust respective amounts of light of two or more wavelengths emitted by the display, the amount of color non-uniformity correction applied decreasing with increased magnitude of the electrical stimulus.