Display Color Calibration via Ambient Light Detection
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Solution Overview
Problem
Conventional color calibration systems for display devices face challenges in achieving precise and stable color matching due to differences in spectral distribution between illumination light and display devices, requiring repeated adjustments and limited precision, especially when ambient lighting conditions are unstable.
Innovation Solution
A color calibration system that includes a display device, a microcomputer, and a colorimeter, equipped with a color sensor to detect ambient light conditions, which calculates and sets a target value using a preset equation to automatically adjust the display device's colorimetry results to match the ambient light, allowing for precise and simple color calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional color calibration using a colorimeter is performed with preset white point or user-desired white point as target value, then color calibration can be performed, but accurate color matching cannot be achieved because the user must manually adjust various conditions (color temperature, illuminance, paper color) that cannot be managed by the display itself
Solution Approach 1:
The display device automatically performs color calibration by detecting ambient light conditions with its own color sensor and adjusting its display output accordingly, eliminating the need for manual user adjustment of color temperature, illuminance, and paper color conditions
Solution Approach 2:
The system uses a colorimeter to measure the actual display output and feeds this information back to the microcomputer, which then automatically adjusts the display parameters to achieve accurate color matching with the ambient light environment
2Measurement precision
If colorimetry is performed on a white reference object irradiated with ambient light, then a target value for color calibration can be obtained, but accurate color matching cannot be achieved because the spectral distribution of the white reference object is greatly different from that of the monitor
Solution Approach 1:
The system changes the target value parameters dynamically based on the detected ambient light color temperature and illuminance conditions, rather than using fixed white reference object values, allowing the display to match the actual viewing environment
Solution Approach 2:
The color calibration system transitions from static white reference object values to dynamic target values that automatically adapt to changing ambient light conditions, ensuring continuous color accuracy
3Measurement precision
If repeated calibration is performed to achieve color matching, then some color accuracy can be improved, but the process becomes extremely complicated and difficult
Solution Approach 1:
The display device performs automatic color calibration without requiring repeated manual user operations, as the system autonomously detects ambient conditions and adjusts parameters in a single calibration process
4Ease of manufacture
If a cheap contact-type colorimeter is used for colorimetry, then cost is reduced, but accurate colorimetry cannot be performed in some cases
Solution Approach 1:
The system uses a prism or reflecting mirror as an intermediary optical element to redirect light from the display screen to the color sensor, enabling accurate color measurement without requiring expensive contact-type colorimeters
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
Enables automatic and precise color calibration by aligning colorimetry results with target values, reducing the complexity and difficulty of achieving accurate color matching in various lighting conditions without the need for specialized equipment or expert knowledge.
Implementation Method 1
a color sensor for detecting a color temperature and illuminance of ambient light
Implementation Method 2
The colorimeter performs colorimetry on a display screen of the display device from the outside
Data Source
AI summary
A color calibration system in accordance with a preferred embodiment of the present invention comprises a display device provided with a color sensor for detecting a color temperature and illuminance of ambient light, a microcomputer, and a colorimeter for performing colorimetry on a display screen of the display device from the outside. The microcomputer calculates a target value by using a preset calculation equation and a detection result on the ambient light detected by the color sensor. Then, the microcomputer automatically performs color calibration of the display device so that a colorimetry result obtained by the colorimeter may agree with the target value.