Ambient Light Flicker Sensor for Accurate Color Spectrum Detection
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Solution Overview
Problem
Measuring ambient lighting conditions with color ambient light sensors can be inaccurate if not properly managed, especially in environments with multiple light sources, leading to insufficient compensation for color casts in displayed content.
Innovation Solution
An electronic device equipped with a color ambient light sensor and a flicker sensor, where the control circuitry analyzes flicker sensor data to identify the number of light sources and retrieve the ambient light color spectrum using color ambient light sensor data, making white point adjustments to displays and image sensors based on the spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a color ambient light sensor is used to measure ambient lighting conditions, then color information can be obtained for display adjustment, but measurement accuracy deteriorates in environments with multiple light sources
Solution Approach 1:
The patent segments the ambient light measurement task into two parts: a flicker sensor detects dynamic changes to identify light source characteristics, while a color ambient light sensor measures color information. By separating the detection functions and combining their outputs, the system achieves accurate measurements in complex lighting environments that neither sensor could achieve alone.
2Difficulty of detecting and measuring
If a flicker sensor with faster response time is added to detect dynamic changes in ambient light, then detection capability is improved, but device complexity increases
Solution Approach 1:
The patent merges two different sensor types (flicker sensor and color ambient light sensor) into a unified ambient light measurement system. The control circuitry integrates data from both sensors, using flicker detection to characterize light sources and color sensing to measure ambient light properties, achieving enhanced detection capability through combination rather than through a single complex sensor.
3Measurement precision
If control circuitry analyzes flicker sensor data to identify light sources and retrieve color spectrum, then color cast compensation accuracy is improved, but processing complexity increases
Solution Approach 1:
The control circuitry performs preliminary analysis of flicker sensor data to identify light source characteristics and characteristics before using the color ambient light sensor data to determine the color spectrum. This preliminary characterization of light sources enables more accurate interpretation of color measurements and improves color cast compensation without requiring complex real-time processing during display adjustment.
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 approach allows for accurate determination of the ambient light color spectrum, enabling effective compensation for color casts and improving the accuracy of ambient light measurements, even in complex lighting environments with multiple light sources.
Implementation Method 1
a flicker sensor that has a faster response time than the color ambient light sensor and that is used in detecting dynamic changes (flicker) in the ambient light
Implementation Method 2
a color ambient light sensor that is configured to produce color ambient light sensor data based on the ambient light
Data Source
AI summary
An electronic device may be operated in ambient light. The electronic device may have a color ambient light sensor that is configured to produce color ambient light sensor data based on the ambient light. The electronic device may also have a flicker sensor that has a faster response time than the color ambient light sensor and that is used in detecting dynamic changes in the ambient light. Control circuitry in the electronic device may analyze flicker sensor data to identify the number of light sources producing the ambient light. The control circuitry may apply a frequency transform to the flicker sensor data or make measurements with the flicker sensor in multiple directions. Based on this information, the control circuitry may identify the number of light sources and may use this information in retrieving an ambient light spectrum associated with the ambient light using the color ambient light sensor data.