Fill Light Device with Deformable Liquid Crystal Light Guide
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Solution Overview
Problem
Existing flash lights in photographing devices have limited fill light intensity and fixed light-emitting angles, making them inadequate for various capturing scenarios, particularly in darker environments where they cannot effectively illuminate distant objects without causing eye strain.
Innovation Solution
A fill light device with a light guide that includes a polarizer, liquid crystal layer, and deformation driving assembly, allowing for adjustable light-exiting area and light-emitting angle control through liquid crystal orientation and shape deformation, respectively, to meet different capturing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the flash light is increased to improve the brightening effect, then the fill light intensity is improved, but the ability of the subject's eyes to withstand the light deteriorates
Solution Approach 1:
The light guide structure creates different light transmission properties in different regions. The first light guide portion has a first light transmission rate while the second light guide portion has a second light transmission rate different from the first, allowing different parts of the flash light to have different illumination intensities. This enables the flash to provide sufficient brightness for filling while reducing direct light exposure to protect the subject's eyes from strain.
2Adaptability or versatility
If the light-emitting angle of the flash light is fixed, then the device structure is simple, but the fill light range is limited and distant objects cannot be illuminated
Solution Approach 1:
The light guide structure is designed with variable optical properties along its length. The first light guide portion and second light guide portion have different light transmission rates, creating a dynamic light distribution pattern that can illuminate both close-range and distant objects. This dynamic light guidance approach expands the fill light range without requiring multiple fixed-angle flash units, thus avoiding excessive device complexity.
3Adaptability or versatility
If a light guide with variable light transmission rates is used to improve light distribution, then the adaptability to different capturing scenarios is improved, but the device complexity increases
Solution Approach 1:
The light guide is divided into multiple segments - specifically a first light guide portion and a second light guide portion - each with different light transmission rates. This segmentation allows the flash light to provide different illumination intensities in different directions, improving adaptability to various capturing scenarios. The segmentation is implemented in a way that integrates with the overall flash structure, avoiding excessive complexity by using a systematic division approach.
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 device provides customizable fill light effects by adjusting light intensity and angle, protecting eyes from direct illumination and enhancing image quality in both close-range and distant capturing scenarios.
Implementation Method 1
the light guide includes a first polarizer, a liquid crystal layer, and a second polarizer arranged in sequence, the light guide is connected to a liquid crystal driving module, and the liquid crystal driving module is configured to control an orientation of a liquid crystal of the liquid crystal layer to change the light-transmitting area of the fill light device
Implementation Method 2
the deformation driving assembly includes magnets, a coil, and a driving ring, the driving ring is configured to surround the light guide one circle, the coil is configured to surround the driving ring, the magnets are located on opposite sides of the driving ring, and the driving ring is driven to push up the light guide for deformation when the coil is energized
Implementation Method 3
the light guide includes a first polarizer, a liquid crystal layer, and a second polarizer arranged in sequence
Data Source
AI summary
Disclosed are a fill light device, a method for controlling a fill light device, and a computer readable storage medium. The fill light device includes a flash light; and a light guide, the light guide being located on a light-exiting side of the flash light and being configured to be controlled to change a shape and/or a light-transmitting area to change a light-exiting area and/or a light-emitting angle of the fill light device. The method includes obtaining a control parameter of the light guide; and changing a shape and/or a light-transmitting area of the light guide according to the control parameter to change a light-exiting area and/or a light-emitting angle of the fill light device.