Distance Measurement Device Live View Control
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Solution Overview
Problem
Existing distance measurement devices cannot perform distance measurement while confirming the subject, especially when transitioning from live view to still image capture, as they lack the ability to display the subject image during distance measurement and may not allow actual exposure until the distance is completely derived.
Innovation Solution
A distance measurement device comprising an imaging unit, an emission unit, a light receiving unit, a derivation unit, and a control unit that displays the subject image as a motion image during distance measurement, allowing transition to actual exposure at the end of the measurement, with optional features like adjustable emission and light receiving sensitivity, and storage settings to handle incomplete data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transition is made to still image capture during distance measurement, then the distance measurement function is activated, but the live view image cannot be displayed and the subject cannot be confirmed
Solution Approach 1:
The patent segments the imaging function into two distinct modes: live view imaging for subject confirmation and still image capture for distance measurement. The control unit manages these modes separately, allowing the live view to continue displaying during distance measurement while enabling still image capture at the appropriate timing, thus resolving the contradiction between maintaining subject visibility and performing accurate distance measurement.
Solution Approach 2:
The patent implements preliminary action by allowing the live view image to be displayed and the subject to be confirmed before and during the distance measurement process. The control unit is configured to permit transition to still image capture only after the distance measurement is completed, ensuring that subject confirmation is not lost during the measurement phase.
2Measurement precision
If actual exposure is delayed until complete distance derivation, then measurement accuracy is ensured, but the response time and usability are reduced
Solution Approach 1:
The patent applies partial action by allowing the control unit to determine that distance measurement is sufficiently completed at an intermediate stage rather than waiting for complete derivation. This enables the system to transition to actual exposure earlier in the process, reducing the time delay while still maintaining adequate measurement accuracy for the imaging task.
3Productivity
If distance measurement is performed continuously, then the distance data is always available, but incomplete or inaccurate data may be stored
Solution Approach 1:
The patent implements feedback through the control unit, which continuously monitors the distance measurement process and determines when the measurement is sufficiently completed. Based on this feedback, the control unit selectively permits transition to still image capture only when appropriate distance data is available, preventing storage of incomplete or inaccurate data while maintaining continuous measurement capability.
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
Enables reliable distance measurement while confirming the subject, allowing actual exposure without waiting for complete distance derivation, and prevents storage of incomplete data, improving the accuracy and usability of distance measurements.
Implementation Method 1
a light receiving unit which receives reflected light of the directional light from the subject
Implementation Method 2
a derivation unit which derives a distance to the subject based on the timing at which the directional light is emitted by the emission unit and the timing at which the reflected light is received by the light receiving unit
Data Source
AI summary
A distance measurement device includes an imaging unit which captures a subject image formed by an imaging optical system, an emission unit which emits directional light as light having directivity along an optical axis direction of the imaging optical system, a light receiving unit which receives reflected light of the directional light from the subject, a derivation unit which derives a distance to the subject based on the timing at which the directional light is emitted and the timing at which the reflected light is received, a display unit which displays the subject image, and a control unit which performs control such that, in a case of performing a distance measurement, the display unit displays the subject image as a motion image and transition is made to a state where actual exposure by the imaging unit is possible at the timing of the end of the distance measurement.