Observation System Display Position Control for Burn-in Prevention
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Solution Overview
Problem
Existing observation systems face challenges in preventing burn-in of display units while minimizing the recognition of misregistration between optical and display images.
Innovation Solution
The observation system employs a control unit that sequentially changes the display position of the display image on the display unit within a specific range, where the maximum width of this range is between 6 arc-minutes and 18 arc-minutes in terms of observation angle, to prevent burn-in and misregistration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display image is continuously displayed at the same position on the display unit, then the visibility of the display image is maintained, but burn-in occurs on the display unit causing deterioration in visibility
Solution Approach 1:
The display position is dynamically changed over time within a predetermined range rather than remaining fixed. The control unit sequentially changes the display position in the first range, transforming the static display into a dynamic one to prevent burn-in while maintaining visibility.
Solution Approach 2:
The display position is changed periodically according to a predetermined sequence. The control unit performs sequential changes in display position within the first range, creating periodic movement that prevents continuous exposure at the same location and thereby prevents burn-in.
2Reliability
If the display position is changed to prevent burn-in, then visibility deterioration is prevented, but misregistration between optical image and display image becomes more noticeable
Solution Approach 1:
The display position is changed within a specific local range (the first range) rather than freely across the entire display. This localized movement prevents burn-in while keeping the display position relatively stable, minimizing misregistration. The first range is specifically defined to balance these two requirements.
Solution Approach 2:
The display position parameters are changed within controlled limits. The control unit sequentially changes the display position within the first range, which is defined by specific angular constraints (6-18 arc-minutes maximum width). This parameter control prevents burn-in while minimizing noticeable misregistration.
3Duration of action of stationary object
If the display image is moved to prevent burn-in, then display unit durability is improved, but the stability of the display position is reduced causing recognition of misregistration
Solution Approach 1:
The display position transitions from a static to a dynamic state within controlled limits. The control unit sequentially changes the display position within the first range, creating controlled dynamics that extend display unit service life through burn-in prevention while maintaining sufficient position stability to minimize misregistration recognition.
Data Source
AI summary
A digital camera has a finder device that enables an optical image which is observable from an observation position and a display image (imaging range frame) of an OLED display to be simultaneously visible by superimposing the display image on the optical image, the digital camera including a system control unit that performs a control of sequentially changing a display position of the display image in the OLED display in a first range, in which a maximum width of the first range is 6 arc-minutes or more and 18 arc-minutes or less in terms of an observation angle (visual angle) in a case where the first range is observed from the observation position.