Electronic Diffuser for Camera Light Control
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Solution Overview
Problem
Electronic devices with cameras and flashes lack effective control over light exposure, particularly in ambient light sensing and photography modes, and have limited control over flash illumination, which can lead to suboptimal image quality and user privacy concerns.
Innovation Solution
Incorporating electronic diffusers with controllable optical properties, such as polymer dispersed liquid crystal (PDLC) devices, curved metal blinds, or photochromic thin films, between the camera lens and exterior, allowing for adjustable diffusivity, transparency, and color to manage light exposure and provide privacy screens, ambient light sensing, and flash control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent encasing is used to cover the camera lens, then light exposure is maximized for photography, but control over ambient light is lost
Solution Approach 1:
The patent applies a dynamic diffuser layer that can change its optical properties (transparency/diffusivity) in response to electrical signals. This allows the system to adapt between different light control states - transparent for maximum light exposure during photography, and diffusing for ambient light sensing - thereby resolving the contradiction between maximizing light exposure and enabling control over ambient light.
2Illumination intensity
If a transparent encasing is used for the flash device, then flash illumination is maximized, but control over flash light distribution is limited
Solution Approach 1:
The patent incorporates a dynamic diffuser layer in the flash device that can be electrically controlled to change between transparent and diffusing states. This enables the flash to provide both maximum illumination intensity (when transparent) and controlled light distribution patterns (when diffusing), resolving the contradiction between maximizing flash output and controlling its distribution.
3Measurement precision
If the camera lens is exposed to external light in non-photography modes, then ambient light sensing is enabled, but privacy concerns arise from potential undetected image capture
Solution Approach 1:
The patent uses a dynamically controllable diffuser layer that switches between transparent and diffusing states based on the camera's operational mode. During non-photography modes such as ambient light sensing, the diffuser is activated to obscure the lens, preventing privacy violations while still allowing the sensor to detect ambient light through the diffusing material. This resolves the contradiction between enabling ambient light sensing and preventing unauthorized image capture.
4Adaptability or versatility
If an electronic diffuser is added to control light exposure, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements the dynamic diffuser as a thin film or layer that can be electrically controlled, rather than a complex mechanical system. This thin-film approach provides the necessary adaptability for light control while minimizing the increase in device complexity, as the diffuser can be integrated into the existing device structure without adding significant bulk or complexity.
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
Enhances image quality by optimizing light exposure, improves ambient light sensing accuracy, and provides privacy protection by ensuring undistorted images are not captured in non-photography modes, while also enabling innovative display methods for application states and messages.
Implementation Method 1
one or more layers of a diffuser positioned between a lens of the camera and the exterior of the electronic device, wherein one or more optical properties of the diffuser is controllable via one or more signals. The diffuser may comprise, for example, one or more segments of a polymer dispersed liquid crystal (PDLC) device
Implementation Method 2
The diffuser may comprise, for example, one or more segments of a polymer dispersed liquid crystal (PDLC) device, a curved metal blind deposited on a glass substrate, a photochromic thin film
Data Source
AI summary
Embodiments of systems and methods for using electronic diffusers to implement message indicators are described. A segment of a diffuser attached to an electronic device is configured to indicate an informational message in response to signals that result in a change to an optical property. A set of information to be displayed using the segment is determined, and a signal is transmitted to the segment to display the information.