Camera Display Illumination Control for Shadow Reduction
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Solution Overview
Problem
Conventional image-capture apparatuses struggle to optimize the display settings during photography, particularly for subjects like people, where shadows and wrinkles are not adequately minimized, and the display's influence on the photographing state is not effectively managed.
Innovation Solution
An image-capture apparatus with a display unit that adjusts its emission light settings, including luminance and color temperature, to enhance the visibility of the subject during exposure, by setting higher luminance and specific color tones during the actual photographing time to reduce shadows and improve the subject's appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display unit emits light during photographing to enhance subject visibility, then the subject illumination is improved, but the display visibility for the photographer deteriorates
Solution Approach 1:
The display unit alternates between emitting light during exposure periods and not emitting light during non-exposure periods. This periodic on/off action allows the display to illuminate the subject when needed while remaining visible to the photographer when the shutter is not active, resolving the contradiction between subject illumination and display visibility
Solution Approach 2:
The display unit's light emission is dynamically controlled based on the photographing state. The emission light control unit adjusts the display output in real-time, making it emit light during exposure and suppress emission during non-exposure, allowing the system to adapt to different operational requirements and eliminate the fixed contradiction
2Loss of information
If conventional techniques adjust luminance based on ambient environment, then display visibility is improved, but the influence of display emission light on subject photographing is not addressed
Solution Approach 1:
The system incorporates feedback from the photographing state to control display emission. The emission light control unit receives information about whether the shutter is open or closed and adjusts display output accordingly, creating a closed-loop control system that simultaneously optimizes both display visibility and subject photographing quality
Solution Approach 2:
The display unit serves multiple functions: it displays live view images for photographer visibility and simultaneously acts as a light source for subject illumination during exposure. The emission light control unit manages both functions by coordinating display output with shutter state, allowing one component to fulfill multiple roles without compromise
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 effectively reduces shadows and enhances the appearance of the subject, resulting in more desirable captured images by optimizing the display settings in real-time during photography.
Implementation Method 1
a technique for controlling the luminance or the color temperature of a backlight of an LED (Light Emitting Diode) of a conventional liquid crystal display apparatus
Data Source
AI summary
An image-capture unit of an image-capture apparatus captures an image of a subject. A display unit can be disposed in a range where emission light from the display unit reaches the subject whose image is captured by the image-capture unit and can display the image using the emission light. An emission light control unit executes control for changing at least one of a display content and a display state of an image displayed on the display unit at a time of photographing in consideration of an influence of the emission light (irradiation light) from the display unit on a photographing state of the subject.