Display Device Color Correction for Temperature and Viewing Angle
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Solution Overview
Problem
Display devices in motor vehicles often display slightly different colors for the same input signal due to variations in temperature and viewing angle, leading to disruptive color differences for users.
Innovation Solution
A method that determines ambient temperature and viewing angle for each display device, applying correction values to ensure consistent color representation across devices by normalizing RGB values with gamma values and adjusting for temperature and viewing angle effects, thereby maintaining color consistency from -20°C to 40°C and across different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display devices operate without temperature compensation, then device complexity is reduced, but color consistency deteriorates under varying temperature conditions
Solution Approach 1:
The system performs preliminary calibration of display devices at different temperatures to determine temperature-dependent correction values. These correction values are stored in advance and applied during operation based on the current temperature, eliminating the need for real-time complex calculations and enabling consistent color display across temperature variations.
Solution Approach 2:
The patent applies temperature-dependent correction values to RGB input signals based on the measured ambient temperature. By dynamically adjusting the color parameters according to temperature conditions, the system compensates for temperature-induced color shifts and maintains color consistency across different operating temperatures.
2Area of stationary object
If multiple display devices are installed close to each other in motor vehicles, then space utilization is improved, but color uniformity deteriorates due to temperature variations
Solution Approach 1:
The system applies individual temperature correction values to each display device based on its specific ambient temperature conditions. By treating each display device's color correction locally according to its thermal environment, the system achieves color uniformity across multiple devices installed in different locations within the vehicle.
Solution Approach 2:
The system continuously monitors the ambient temperature of each display device and dynamically adjusts the correction values applied to their input signals. This feedback mechanism ensures that color uniformity is maintained across multiple display devices despite temperature variations caused by their close proximity and different environmental exposures.
Data Source
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AI summary
The invention relates to a method for operating a display device, having the following steps: - providing an input signal which comprises at least one RGB value, - providing a gamma value of the display device, - providing a comparison matrix of the display device, - standardizing the RGB value dependent on the gamma value, - multiplying the standardized RGB value by the comparison matrix and thereby ascertaining an output value, - back-transforming the output value dependent on the gamma value and thereby ascertaining a corrected RGB value, and - providing an output value for the display device, said output signal comprising the corrected RGB value.