Forward Looking Light Sensor with Rounded Aperture
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Solution Overview
Problem
Conventional forward looking light sensors employing lens-based solutions are costly and complex, necessitating a more efficient and cost-effective approach for adjusting display systems based on luminance detection.
Innovation Solution
A non-lens based logarithmic forward looking light sensor utilizing light blocking materials to form an aperture, which effectively mimics the cosine squared function through shadowing techniques and mathematical optimization of dimensions, providing a cost-effective alternative for luminance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens-based solution is employed to attenuate incident light as a function of the cosine squared of the angle of incidence, then the light sensing accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent creates a simplified geometric model that copies the essential cosine squared angular response characteristic without requiring a physical lens. By using a planar sensor array with specific geometric relationships between sensor elements and the light source, the system replicates the angular attenuation function through geometry alone, eliminating the need for complex optical components while maintaining measurement accuracy
Solution Approach 2:
The patent replaces the optical mechanical system (lens) with a geometric arrangement of planar sensor elements. Instead of using a physical lens to refract and attenuate light based on angle of incidence, the system uses the spatial positioning and relative orientations of multiple planar sensors to achieve the same cosine squared angular response through geometric relationships, thereby simplifying the device
2Measurement precision
If a lens-based solution is employed to attenuate incident light as a function of the cosine squared of the angle of incidence, then the light sensing accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The patent employs inexpensive planar sensor elements that can be manufactured using standard flat-panel display technologies rather than requiring precision optical lens manufacturing. These planar sensors are significantly cheaper to produce and can be fabricated using existing semiconductor and display industry processes, making the overall system more cost-effective while achieving the same functional goal
Solution Approach 2:
The patent changes the fundamental parameters of the sensing system from optical parameters (lens curvature, refractive index, focal length) to geometric parameters (sensor element spacing, orientation angles, positions relative to light source). This parameter transformation allows the system to achieve cosine squared angular response through geometric configuration rather than optical design, dramatically reducing manufacturing complexity and cost
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
The solution enables efficient luminance adjustment systems by replicating the cosine squared function without the need for costly lenses, thereby reducing complexity and enhancing operational efficiency.
Implementation Method 1
employing a non-lens based logarithmic forward looking light sensor which utilizes light blocking materials to form an aperture, which effectively mimics the cosine squared function through shadowing techniques
Implementation Method 2
The sensor may be coupled with an electronic detection device to determine the amount of luminance the forward looking light sensor comes in contact with
Data Source
AI summary
A forward looking light sensor is described herein. The sensor includes a first light blocking material; a second light blocking material; and a light sensor with a first surface and a second surface. The first light blocking material is disposed on the first surface of the light sensor and the second light blocking material is disposed on the first surface of the light sensor, and the first light blocking material and the second light blocking forming an aperture.