Adaptive AR Display Brightness Control Under Ambient Light
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Solution Overview
Problem
Augmented reality display apparatuses struggle to provide clear virtual images in outdoor scenarios due to high ambient light intensity, leading to increased power consumption and heat generation, while existing light screens compromise visibility in low-light conditions.
Innovation Solution
An adaptive control device with sensors and processors that adjust the brightness of the display panel and light modulator based on ambient light intensity, using multiple power sources to optimize image clarity and reduce power consumption across varying light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the display panel is increased to provide clear virtual images in outdoor scenarios, then the visibility of virtual images is improved, but the power consumption and heat generation increase
Solution Approach 1:
The system dynamically adjusts the brightness of the display panel and light transmission rate of the light modulator based on real-time ambient light intensity detection. Multiple photosensors detect ambient light at different orientations, and the processor determines true orientation to adaptively control display parameters, allowing the system to optimize visibility while minimizing power consumption according to actual lighting conditions
Solution Approach 2:
The system changes operational parameters (brightness of display panel, light transmission rate of light modulator) based on detected ambient light intensity. By monitoring ambient light conditions and adjusting display parameters accordingly, the system achieves clear virtual image visibility in outdoor scenarios while avoiding excessive power consumption and heat generation
2Illumination intensity
If the light transmission rate of the light modulator is increased to improve visibility in low-light conditions, then the visibility of virtual images is improved, but the power consumption increases
Solution Approach 1:
The system dynamically adjusts the light transmission rate of the light modulator based on real-time ambient light intensity detection. Multiple photosensors detect ambient light at different orientations, and the processor determines true orientation to adaptively control light modulator parameters, allowing the system to optimize visibility while minimizing power consumption according to actual lighting conditions
Solution Approach 2:
The system changes the light transmission rate parameter of the light modulator based on detected ambient light intensity. By monitoring ambient light conditions and adjusting light transmission rate accordingly, the system achieves improved visibility in low-light conditions while avoiding excessive power consumption
3Measurement precision
If multiple photosensors are used to detect ambient light at multiple orientations, then the accuracy of ambient light detection is improved, but the device complexity increases
Solution Approach 1:
The system divides the ambient light detection task into multiple segments by using multiple photosensors positioned at different orientations. Each photosensor detects ambient light intensity from a specific direction, and the processor integrates these segmented measurements to determine true orientation and accurate ambient light conditions, improving measurement precision through spatial segmentation
Solution Approach 2:
The system uses feedback from multiple photosensors to continuously monitor ambient light intensity from different orientations. The processor analyzes this feedback information to determine true orientation and adjust display parameters accordingly, creating a closed-loop control system that improves detection accuracy while managing device complexity through intelligent processing
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 clear viewing of augmented reality in diverse lighting conditions by dynamically adjusting display panel brightness and light modulator transmission rates, minimizing power consumption and heat generation, thus enhancing user experience.
Implementation Method 1
one or more sensors comprise a plurality of photosensors configured to detect ambient light intensities at a plurality of sampling orientations
Data Source
AI summary
An adaptive control device includes one or more processors; one or more sensors coupled to the one or more processors; and one or more power sources coupled to the one or more processors. The one or more power sources are coupled to a display panel. The one or more sensors include a plurality of photosensors configured to detect ambient light intensities at a plurality of sampling orientations with respect to one or more view zones, respectively; and one or more position sensors configured to detect a reference angular position of the adaptive control device. The one or more processors are configured to determine a true orientation from which ambient light intensity signals are detected at a respective time point based on information on the plurality of sampling orientations with respect to one or more view zones, respectively, and the reference angular position of the adaptive control device.