Transmissive Display Optical Finder for Camera Zoom Control
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Solution Overview
Problem
Digital cameras and cellular phone terminals face issues with high power consumption and delayed image display during photography, leading to potential missed shots due to frame omission, especially in low-luminance environments, and require costly or bulky solutions for improved performance.
Innovation Solution
An image photographing apparatus with a transmissive display section that functions as an optical finder in photographing mode, allowing direct real-world confirmation without increased size or cost, and a distance detection system to control the zoom function based on the photographer's viewing distance, ensuring accurate field angle determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display device continuously updates image data in the draft state, then the photographer can determine the photographing angle, but power consumption increases
Solution Approach 1:
The patent applies dynamics by switching the display device between different operational states based on the photographing condition. In the draft state, the display updates image data to allow angle determination, while in the photographing state, it transitions to a transmissive state to reduce power consumption. This dynamic state change resolves the contradiction between operational ease and energy usage.
Solution Approach 2:
The patent changes the display parameter from a reflective/stateful display mode to a transmissive display mode during photographing. This parameter change allows the display to function as an optical finder, eliminating the need for continuous image data updates and thereby reducing power consumption while maintaining photographing angle determination capability.
2Speed
If the image data is updated frequently in the display device, then the image display is smooth, but the display lags behind the real-world entity
Solution Approach 1:
The patent extracts the image display function from the optical finder function by using a transmissive display device. During photographing, the display transitions to a transmissive state where the optical path is direct, eliminating the need for image data updates and processing. This extraction resolves the contradiction by separating the two functions: angle determination uses the transmissive optical path with no delay, while image display can occur separately without affecting the real-time optical view.
3Measurement precision
If the exposure time is elongated in low luminance environment, then the image capturing sensitivity is improved, but the output frame rate becomes slower
Solution Approach 1:
The patent replaces the electronic display update mechanism with an optical mechanism during photographing. By transitioning the display to a transmissive state, the system eliminates the need for continuous image processing and display updates, thereby maintaining high frame rates even when the camera sensor operates with longer exposure times for improved sensitivity in low light conditions.
4Use of energy by moving object
If the transmissive display section is used in photographing mode, then power consumption is reduced, but the field angle determination must be automated
Solution Approach 1:
The patent implements self-service by enabling the distance detection section to automatically control the zoom function based on detected distance. This automation allows the system to maintain accurate field angle determination without requiring manual user intervention, thereby resolving the contradiction between reduced power consumption from using transmissive display and the need for automated control mechanisms.
Data Source
AI summary
An image photographing apparatus is provided, which includes a camera section having a zoom function for changing a photographing field angle, a transmissive display section including a display surface that allows sides facing each other to be transmissively viewed from both directions of a housing front side and a housing back side, a distance detection section that detects a distance from a point of view of a photographer to the display surface of the display section, and a control section. The control section controls the display surface of the transmissive display section in a transmissively viewable state when in photographing mode so as to perform photographing by the camera section, and determines a photographing field angle using the zoom function of the camera section in response to the distance detected by the distance detection section.