Ambient-Adaptive Display Color Control via Proximity Sensor
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Solution Overview
Problem
Ambient light sensors in electronic devices can produce erroneous readings due to external obstructions, leading to inappropriate display adjustments in varying lighting conditions, which affects the user's experience and comfort.
Innovation Solution
Incorporating a color ambient light sensor that measures ambient light intensity and color through a window in the display's inactive border region, allowing the display control circuitry to adjust the white point and color cast of the display to match the ambient light conditions, with the option to adjust saturated readings to less saturated colors on the Planckian locus for accurate adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ambient light sensor readings are used to adjust display brightness and color, then display adaptability to ambient lighting conditions is improved, but measurement precision deteriorates when external objects block the sensor
Solution Approach 1:
The patent introduces a proximity sensor as an intermediary device that detects the presence of external objects (such as user's hand or face) near the display. This intermediary sensor provides additional information that helps the system distinguish between legitimate ambient light changes and sensor blockages, allowing the display control circuitry to make more accurate adjustments without being misled by blocked ambient light sensor readings
2Adaptability or versatility
If display color cast is adjusted to match measured ambient light color, then display adaptability is improved, but color accuracy deteriorates when ambient light color is outside acceptable range
Solution Approach 1:
The patent implements dynamic adjustment of display color cast based on the measured ambient light color. The system continuously monitors ambient light conditions and adjusts the display's white point and color temperature accordingly. When ambient light color falls within an acceptable range, the display adapts to match it; when outside the acceptable range, the system dynamically determines an adjusted ambient light color that is brought back within the acceptable range, ensuring color accuracy is maintained while still providing adaptive display behavior
Solution Approach 2:
The system changes the display's color parameters (white point, color temperature, color cast) based on the measured ambient light color. By adjusting these parameters dynamically according to ambient conditions, the display achieves adaptability while maintaining color accuracy through controlled parameter modifications that keep the display output within acceptable colorimetric ranges
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
This solution ensures that the display's color cast adapts to ambient lighting conditions, enhancing user experience by avoiding perceived discoloration and potentially improving sleep quality by reducing blue light emission in warm environments, thus promoting better sleep.
Implementation Method 1
A color ambient light sensor may make measurements of ambient light intensity and color through a window in an inactive border region of the display
Implementation Method 2
the display control circuitry may adjust the color cast of the display to more closely match the measured color of ambient light
Implementation Method 3
The adjusted ambient light color may have chromaticity coordinates that are located on a Planckian locus
Data Source
AI summary
An electronic device may be provided with a display, display control circuitry that operates the display, and a color ambient light sensor that gathers ambient light information. Display color cast may be adjusted based on the ambient light information. When the color of ambient light is within an acceptable range of colors, the color cast of the display may be adjusted to more closely match the color of ambient light. When the color of ambient light is outside of the acceptable range of colors, display control circuitry may determine an adjusted ambient light color that is within the acceptable range. The adjusted ambient light color may have the same color temperature as the measured ambient light color. After determining an adjusted ambient light color that is within the acceptable range, the color cast of the display may be adjusted to more closely match the adjusted ambient light color.