Virtual Ambient Illuminance Sensing for Sensorless Display Calibration
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Solution Overview
Problem
Standalone computing devices without embedded light sensors struggle to reproduce perceptually accurate colors due to varying ambient illuminance, necessitating expensive professional calibration or user-adjusted settings.
Innovation Solution
A virtual ambient illuminance sensor system that utilizes a communicatively connected mobile device with an illuminance sensor to provide ambient illuminance snapshots to the standalone device, adjusting display settings without requiring embedded sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an illuminance sensor is embedded in the standalone device, then display brightness and color accuracy can be automatically adjusted to ambient conditions, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent uses a mobile device as an intermediary to perform illuminance measurements. The standalone device communicates with the mobile device, which has an illuminance sensor, to obtain ambient light data. This mediator approach allows the standalone device to achieve illuminance detection capability without embedding a sensor directly, thus resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent creates a virtual illuminance sensor by copying the functionality of a physical sensor through software. The mobile device's illuminance sensor data is transferred to the standalone device, creating a virtual sensor that provides the same measurement capability without requiring physical hardware modification of the standalone device.
2Measurement precision
If professional calibration is performed to achieve accurate display colors, then color accuracy improves, but cost and time consumption increase
Solution Approach 1:
The patent implements a feedback mechanism where the illuminance sensor continuously monitors ambient light conditions and automatically adjusts display parameters. This real-time feedback loop eliminates the need for manual professional calibration by automatically adapting the display to current ambient conditions, thus reducing both time and cost while maintaining color accuracy.
Solution Approach 2:
The system performs preliminary measurements of ambient illuminance conditions and pre-adjusts display settings before the user notices any color inaccuracies. By proactively detecting ambient light changes and adjusting display parameters in advance, the system prevents color accuracy degradation without requiring reactive calibration interventions.
3Ease of operation
If user-adjusted brightness settings are used, then ease of operation improves, but display accuracy in varying ambient conditions deteriorates
Solution Approach 1:
The patent transitions from static user-set brightness levels to dynamic automatic adjustment based on real-time illuminance measurements. The system continuously adapts display brightness to match ambient lighting conditions, providing both ease of operation (automatic adjustment) and measurement precision (accurate ambient light response) simultaneously.
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 standalone devices to maintain accurate display brightness and color based on ambient conditions, enhancing user experience and reducing the need for device modifications.
Implementation Method 1
an ambient illuminance sensor that senses an ambient illuminance and generates a series of illuminance signals
Data Source
AI summary
The virtual ambient illuminance sensor system disclosed herein provides a method including detecting presence of an external device in vicinity of the device, wherein the external device is communicatively connected to the device, communicating with the external device to determine that the external device has an illuminance sensor, based at least in part on determining that the external device has an illuminance sensor; receiving an ambient illuminance snapshot from the external device, storing the ambient illuminance snapshot from the external device in the memory, and generating an ambient illuminance report for an operating system of the device.