Color Mapping Table for Display Illuminator Variation Compensation
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Solution Overview
Problem
Solid-state light illuminators in display systems suffer from calorimetric variations due to environmental changes, such as temperature variations and electrical current fluctuations, leading to inconsistent color properties in projected images.
Innovation Solution
A method and system for constructing a color mapping table that compensates for these variations by measuring and correlating calorimetric properties and color intensities, allowing for the generation of bitplanes that maintain color consistency across different illuminator conditions, using an external calorimeter and internal sensor to derive parameters for the color mapping table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If solid-state light illuminators are used to provide light of different colors, then compact size and lower power consumption are achieved, but calorimetric variations occur due to temperature changes and environmental factors
Solution Approach 1:
The patent changes the parameters of the color mapping table based on measured calorimetric properties and color intensities under different operating conditions. By adjusting the mapping parameters to compensate for temperature and environmental variations, the system maintains consistent color output while using energy-efficient solid-state illuminators
Solution Approach 2:
The system implements feedback by measuring actual calorimetric properties and color intensities from the illuminators under different operating conditions, then using these measurements to derive corrected parameters for the color mapping table. This closed-loop approach ensures color consistency despite variations in temperature and environmental factors
2Manufacturing precision
If a color mapping table is built for a specific set of parameters including duty cycles and illuminator characteristics, then color accuracy is achieved under those conditions, but the table becomes invalid when duty cycles or illuminators change
Solution Approach 1:
The patent derives multiple sets of parameters for the color mapping table corresponding to different duty cycles and illuminator characteristics. By storing and selecting appropriate parameter sets based on current operating conditions, the system maintains color accuracy across varying conditions without requiring a single fixed mapping table
Solution Approach 2:
The system creates a universal color mapping table structure that can function under multiple different operating conditions by incorporating multiple parameter sets. This multi-functional approach allows the same table structure to adapt to different duty cycles and illuminator variations, eliminating the need for separate tables for each condition
3Adaptability or versatility
If duty cycles of illuminators are varied to produce different colors, then color diversity is achieved, but calorimetric properties of produced images become inconsistent
Solution Approach 1:
The patent derives parameters for the color mapping table that specifically account for different duty cycle configurations. By adjusting the mapping parameters based on the actual duty cycles used for each color, the system maintains consistent calorimetric properties across diverse color outputs, compensating for the variations introduced by different illuminator timing
Data Source
AI summary
A color control algorithm compensates variations in the display system so as to maintain color consistency in the projected images on the screen by constructing a color mapping table of the display system to include effects due to the variations and during image display applications, generating inputs of the color mapping table to include the effects due to the variations in the display system.