Projection Color Gamut Blending for Accurate 2D and 3D Display
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Solution Overview
Problem
Existing 3D displays with six primary colors (6P) systems have limited color gamuts when displaying 2D images, leading to chromaticity errors and reduced color reproduction capabilities.
Innovation Solution
A projection system comprising two projection devices and a spatial modulator, which processes video data to generate intensity values for two virtual color gamuts, adjusts pixel levels, and blends these gamuts with a native color gamut to enhance color reproduction, achieving a wide color gamut and high dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a six primary color (6P) system is used for 3D display, then 3D image capability is achieved, but color gamut is limited when displaying 2D images
Solution Approach 1:
The patent segments the color reproduction task into two distinct gamuts: a first color gamut for 3D image display using six primaries, and a second color gamut for 2D image display with extended color range. The electronic processor selectively activates appropriate primaries based on whether 3D or 2D content is being displayed, allowing each gamut to be optimized for its specific purpose without compromise.
Solution Approach 2:
The system dynamically switches between different color gamut configurations based on the display mode. The electronic processor adjusts which primaries are active and how they are combined, transitioning between a six-primary configuration for 3D content and an optimized configuration for 2D content, thereby adapting the color reproduction characteristics to match the required display mode.
2Adaptability or versatility
If six primary colors are used to display 2D images, then 3D capability is maintained, but chromaticity errors increase
Solution Approach 1:
The patent applies different quality standards and processing methods to different display modes. For 2D images, the system uses a dedicated second color gamut with optimized primary combinations that prioritize chromaticity accuracy. For 3D images, a different optimization is applied that prioritizes stereoscopic separation. This local optimization ensures each mode achieves its specific quality requirements.
Solution Approach 2:
The electronic processor changes key parameters including which primaries are active, their intensity relationships, and the overall gamut boundaries based on the display mode. This parameter adjustment allows the system to minimize chromaticity errors for 2D content while maintaining 3D capability when needed, effectively resolving the chromaticity accuracy issue.
3Device complexity
If native color gamut is used for projection, then device simplicity is maintained, but color reproduction range is limited
Solution Approach 1:
The projection system uses a single physical device that serves multiple functions: it can display both 3D and 2D content with optimized color reproduction for each mode. The electronic processor and controllable light sources enable the same hardware to adapt its color gamut characteristics, eliminating the need for separate projection devices for different content types while expanding the overall color reproduction capability.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3
AI summary
A projection system and method therefore related to a first projection device; a second projection device; at least one spatial modulator; and an electronic processor configured to: receive a two-dimensional video data, generate a first plurality of intensity values of a first color gamut and a second plurality of intensity values of a second color gamut, subtract a luminance threshold from a plurality of pixel values of the second color gamut to yield a plurality of positive pixel values and a plurality of negative pixel values, set respective ones of the plurality of pixel values to predetermined values to obtain a residual of the second color gamut, add the residual to the first color gamut, add maximized pixel values to the first color gamut and the second color gamut to create an output gamut, and blend the output gamut with a native color gamut to generate a blended gamut.