Three-Dimensional Color Synthesis for HDR Artifact Mitigation
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Solution Overview
Problem
Conventional imaging technologies face challenges in reproducing colors accurately across a wide range of brightness levels, leading to issues like flicker and color breakup due to luminance differences and the use of multiple backlight sources, which can result in perceptible artifacts in high dynamic range (HDR) imaging.
Innovation Solution
The implementation of three-dimensional color synthesis techniques using dual modulators and pixel mosaics to adjust color characteristics, allowing for the precise modulation of colored light sources to match the intended color values, thereby reducing luminance variations and artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple colored backlight sources are used to achieve wide color gamut and HDR imaging, then color reproduction capability is improved, but luminance differences between backlights cause perceptible artifacts such as flicker and color breakup
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different color channels. Specifically, the blue backlight has its luminance reduced locally in regions where it would otherwise cause excessive brightness compared to red and green backlights. This is achieved through spatially selective dimming of the blue backlight to match the luminance levels of other color backlights, thereby eliminating the harmful luminance differences that cause flicker and color breakup artifacts while preserving the overall wide color gamut capability
Solution Approach 2:
The patent changes the luminance parameter of the blue backlight dynamically based on the displayed content and spatial location. By adjusting the blue backlight's intensity from its original high level to a reduced level that matches red and green backlight luminance, the system resolves the contradiction between maintaining wide color gamut (which requires strong blue) and avoiding luminance mismatch artifacts. This parameter adjustment is applied selectively rather than globally, preserving color accuracy while eliminating artifacts
2Ease of operation
If conventional LCD structures with transistors and capacitors are used for each sub-pixel, then pixel control capability is improved, but light transmission efficiency deteriorates
Solution Approach 1:
The patent segments the display system into two independent parts: color generation (handled by the backlight unit with multiple colored LEDs) and spatial modulation (handled by the LCD panel). This segmentation allows the removal of non-light-transmitting components like transistors and capacitors from the pixel structure, as color control is shifted to the backlight side. The result is improved light transmission efficiency while pixel control capability is maintained through the coordinated operation of backlight modules and LCD modulators
Solution Approach 2:
The patent replaces the conventional electrical control mechanism (transistors and capacitors in each pixel) with an optical control approach using multiple colored backlight sources. Instead of electrically controlling each sub-pixel's color, the system uses spatial and temporal modulation of multiple colored light fields that pass through the LCD panel. This substitution eliminates the need for complex electrical components in each pixel, thereby improving light transmission efficiency while maintaining full color control capability
Data Source
AI summary
Embodiments of the invention relate generally to generating images, and more particularly, to systems, apparatuses, integrated circuits, computer-readable media, and methods to facilitate the use of three dimensional color synthesis techniques to reproduce colors properly using, for example, two sub-pixel mosaics, at a boundary between two colors. A method can include receiving into a color element a first colored illuminant and a second colored illuminant. The method also can include determining that the color element is configured to generate a color that has one or more color characteristics for a portion of the reproduced image. Further, the method can include modifying at least one of the first colored illuminant and the second colored illuminant to adjust the one or more color characteristics into a range of values associated with a portion of an image that corresponds to the portion of the reproduced image.