Display Luminance Adjustment via Pupil Diameter and Logarithmic Light Sensing
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Solution Overview
Problem
Electronic displays face challenges in maintaining optimal luminance due to dynamic environmental conditions, particularly in vehicles where exterior lighting can obstruct the viewing experience, and existing linear light systems are inadequate for wide dynamic ranges.
Innovation Solution
A system combining a gaze tracking device and a logarithmic ambient light sensor to adjust the luminance of electronic displays dynamically, using a combination of pupil diameter and ambient light information to optimize display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If linear light systems are used to adjust display luminance, then the system is simple to implement, but the system cannot work over wide dynamic ranges (6-8 decades)
Solution Approach 1:
The patent transitions from linear light sensing to logarithmic light sensing, fundamentally changing the measurement parameter scale. This allows the system to handle wide dynamic ranges (6-8 decades) by compressing the measurement scale, enabling accurate luminance detection across varying ambient light conditions without requiring complex hardware modifications
2Illumination intensity
If display luminance is increased to counteract high ambient light, then visibility improves, but energy consumption increases
Solution Approach 1:
The system continuously monitors ambient light conditions using a logarithmic light sensor and dynamically adjusts display luminance in real-time based on the measured environment. This feedback mechanism ensures the display maintains optimal visibility while consuming minimal energy by only increasing luminance when and where needed, rather than maintaining high luminance constantly
Solution Approach 2:
The display luminance is made dynamically adjustable rather than fixed, allowing the system to adapt to changing ambient light conditions. The logarithmic sensor enables precise detection of light level changes, triggering proportional luminance adjustments that maintain visibility while optimizing energy consumption across different operating conditions
3Ease of manufacture
If conventional light sensors are used, then the system is easy to implement, but the sensors are incompatible with Silverstein methodology optimized for linear light sensing
Solution Approach 1:
The patent adopts logarithmic light sensing that is specifically compatible with the Silverstein methodology for display visibility optimization. This parameter change in the sensing approach enables proper integration with the established Silverstein framework, allowing accurate calculation of required display luminance to counteract ambient light effects while maintaining ease of implementation through standardized sensing technology
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 enhances the visibility and usability of electronic displays in varying environmental conditions by dynamically adjusting luminance, improving the viewing experience, especially in vehicles, by leveraging existing gaze tracking technologies and logarithmic light sensing capabilities.
Implementation Method 1
A gaze tracking device is employed to capture an image of a pupil associated with a viewer of the electronic display, with a diameter of the pupil being ascertained via the image of the pupil
Implementation Method 2
an ambient light sensor receiver to logarithmically receive light information from an ambient light sensor
Implementation Method 3
a display adjuster to adjust a luminance of the electronic display based on a combination of the diameter and the light information
Data Source
AI summary
A system for adjusting an electronic display is provided herein. The system includes a gaze tracking device to capture an image of a pupil associated with a viewer of the electronic display, and a diameter of the pupil being ascertained via the image of the pupil. In another example, the system may also include an ambient light sensor receiver to logarithmically receive light information from an ambient light sensor; and a display adjuster to adjust a luminance of the electronic display based on a combination of a diameter and the light information.