Dual Sensor Image Pickup Device with Semi-Transmissive Mirror
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Solution Overview
Problem
Single-lens reflex cameras experience a blackout during data transfer as they cannot display a live view image due to the switching of sensors from a mirror-down state to a mirror-up state, disrupting continuous observation of the subject.
Innovation Solution
An image pickup device with a first image sensor for recording and a second image sensor for live view, along with semi-transmissive optical members that allow continuous light transmission and reflection, enabling uninterrupted live view display by switching between sensors during exposure and data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used for both recording and live view, then the device structure is simple, but the live view cannot be displayed during data transfer causing blackout
Solution Approach 1:
The patent divides the imaging function into two separate sensors: a first image sensor for recording and a second image sensor for live view display. This segmentation allows each sensor to operate independently, enabling continuous live view display while the first sensor performs data transfer without causing blackout.
Solution Approach 2:
The patent employs a movable mirror that can switch between directing light to the first image sensor for recording and the second image sensor for live view. This multi-functional component enables a single optical path to serve dual purposes, resolving the contradiction between unified structure and continuous display.
2Adaptability or versatility
If a movable mirror is used to switch between recording and live view sensors, then the device can switch functions, but the live view is interrupted during mirror switching and data transfer
Solution Approach 1:
The patent prepares the second image sensor in advance as a standby for live view display. When the first sensor completes recording and enters data transfer mode, the mirror has already been positioned to direct light to the second sensor, ensuring continuous live view without interruption or delay.
Solution Approach 2:
The patent maintains continuous live view display by switching to the second image sensor during the data transfer period of the first sensor. This ensures the useful action of live view observation continues uninterrupted, eliminating blackout periods while the recording data is being transferred.
3Productivity
If the sensor for LV is stopped during recording, then the recording function is prioritized, but the live view display is interrupted
Solution Approach 1:
The patent segments the imaging responsibilities between two sensors: the first image sensor dedicated to recording operations and the second image sensor dedicated to live view display. This allows both functions to operate simultaneously without interfering with each other, maintaining both recording efficiency and live view continuity.
Solution Approach 2:
The patent introduces a movable mirror as an intermediary that directs light to different sensors based on operational requirements. During recording, the mirror directs light to the first sensor; during data transfer, it directs light to the second sensor for live view, mediating between recording efficiency and display continuity requirements.
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 allows for continuous live view display without interruption, improving user experience by maintaining real-time subject observation during photography operations.
Implementation Method 1
a first optical member configured to transmit the subject light and allow the subject light to enter the first image sensor and at the same time reflects the subject light
Implementation Method 2
a first image sensor configured to photoelectrically convert subject light and generate an image, a second image sensor configured to photoelectrically convert the subject light and generate an image for a live view
Data Source
AI summary
An image pickup device includes a first image sensor for photoelectrically converting subject light and generating an image, a second image sensor for photoelectrically converting the subject light and generating an image for a live view, a first optical member for transmitting the subject light and allowing the subject light to enter the first image sensor, and at the same time, reflecting the subject light, and a second optical member for leading the subject light reflected by the first optical member to the second image sensor and allowing the subject light to enter the second image sensor.