Adjustable Light Diffusing Material for Uniform Illumination
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Solution Overview
Problem
Conventional light source modules in small devices, such as mobile cameras, often fail to provide uniform illumination across varying distances and camera modes due to a lack of adjustment for zoom levels and different lens systems, resulting in uneven illumination of scenes.
Innovation Solution
A light source module with an adjustable light diffusing material that adjusts the level of diffusion based on the combination of wide-angle and telephoto lens system fields of view, using a controller to determine the appropriate diffusion level to match the camera's field of view, ensuring even illumination across different distances and modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed light source module is used without adjustment for zoom levels and different lens systems, then the device complexity is reduced, but the illumination uniformity across different distances and camera modes deteriorates
Solution Approach 1:
The patent applies the dynamics principle by making the light diffusing material adjustable rather than fixed. The controller dynamically changes the diffusion level of the light source module based on the camera's current zoom level and lens system configuration, allowing the illumination pattern to adapt to different shooting scenarios and maintain uniformity across varying distances and modes
Solution Approach 2:
The patent implements parameter changes by modifying the diffusion parameter of the light source module in response to changes in camera parameters such as zoom level and lens system. The controller adjusts the light diffusion characteristics to match the optical parameters of the camera, ensuring that illumination uniformity is maintained across different operating conditions
2Illumination intensity
If an adjustable light diffusing material is added to match different camera modes and zoom levels, then the illumination uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single adjustable light diffusing material that can serve multiple functions across different camera modes and zoom levels. Rather than requiring separate light sources for different scenarios, one adaptable component handles varying illumination requirements, reducing the number of parts needed while maintaining performance
Solution Approach 2:
The patent implements feedback through the controller that receives information about the camera's current mode and zoom level, then adjusts the light diffusion accordingly. This closed-loop control ensures the illumination matches the actual shooting conditions, optimizing uniformity without requiring manual intervention or complex mechanical adjustments
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 ensures that the illumination field of the light source module matches the composite camera field of view, providing even illumination across the scene, regardless of distance or camera mode, leading to improved image quality by maintaining similar illumination intensity across the entire field of view.
Implementation Method 1
an adjustable light diffusing material positioned relative to the one or more illumination elements such that light emitted from the one or more illumination elements is diffused by the adjustable light diffusing material as the light passes through the adjustable light diffusing material
Data Source
AI summary
A light source module includes an illumination element and an adjustable light diffusing material. The light source module is configured to receive or generate a control signal for adjusting diffusion of light emitted from the light source module and accordingly adjust an amount of diffusion of light emitted from the light source module. In some embodiments, an adjustable light diffusing material includes a polymer stabilized cholesteric texture (PSCT), a smectic phase liquid crystal, a polymer network liquid crystal (PNLC), or other suitable material. A controller for a light source module may determine a level of diffusion based on a level of inclusion of a wide-angle field of view of a wide-angle lens system or a telephoto field of view of a telephoto lens system in a composite camera field of view that includes a combination of the wide angle field of view and the telephoto field of view. Also, the controller may determine a level of diffusion based or an estimated distance to a scene in a camera field of view that is to be captured.