Camera Illuminating Device Uniform Brightness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing illuminating devices for photography, particularly those using LEDs, face issues with uneven illumination due to the smaller light output of individual LEDs and the time-consuming process of adjusting illuminating angles, leading to non-uniform brightness and inefficient light distribution.
Innovation Solution
An illuminating device with a plurality of current-controlled LEDs, a storage unit for light emission brightness information, and a light emission control unit that adjusts electrical currents to achieve uniform brightness levels and adapt to varying angles of view, using data to correct variance among LEDs and between central and peripheral areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a plurality of LEDs are disposed in a simple dispersive arrangement, then the overall quantity of illuminating light can be increased, but uneven illumination occurs on the subject
Solution Approach 1:
The illuminating device divides the illumination task into multiple independent LED units, each responsible for a specific region. The control unit segments the illumination control by individually adjusting the drive current for each LED based on its position, allowing different brightness levels for different regions to achieve uniform overall illumination.
Solution Approach 2:
Different LEDs are assigned different drive currents based on their local position in the array. LEDs in certain positions receive higher currents while others receive lower currents, creating local quality variations that compensate for the dispersive arrangement and achieve uniform overall illumination.
2Adaptability or versatility
If the light emitting element is mechanically moved to adjust the illuminating angle, then the illuminating angle can be adjusted in correspondence to the angle of view, but the operation becomes time-consuming
Solution Approach 1:
The patent replaces the mechanical moving system with an electronic control system. Instead of physically moving the light emitting element to change the illuminating angle, the control unit electronically adjusts the drive currents to different LEDs based on the angle of view, achieving angle adaptation without mechanical movement.
Solution Approach 2:
The system dynamically selects and adjusts the illumination parameters based on real-time shooting conditions. The control unit receives information about the angle of view and automatically adjusts which LEDs are activated and at what brightness levels, enabling rapid adaptation without mechanical adjustment time.
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 uniform illumination across the image plane, reducing the extent of uneven illumination and allowing for efficient adjustment of illuminating angles without mechanical moving parts, thereby improving photography lighting consistency and speed.
Implementation Method 1
an illuminating unit having a plurality of current-controlled light emitting elements, which illuminates a subject with light emitted from the plurality of light emitting elements
Data Source
AI summary
An illuminating device for photographing includes: an illuminating unit having a plurality of current-controlled light emitting elements, which illuminates a subject with light emitted from the plurality of light emitting elements; a storage unit in which light emission brightness information is stored in correspondence to each of the plurality of light emitting elements; and a light emission control unit that controls light emission at the plurality of light emitting elements based upon the light emission brightness information stored in the storage unit so that the plurality of light emitting elements achieve uniform brightness levels at the subject.