Stereo Imaging Focus Control With Left-Right Position Feedback
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Solution Overview
Problem
Existing stereoscopic image display systems face issues with high power consumption, complex driving circuits, and user-dependent focus adjustments that can lead to discomfort due to improper left-right focus differences, which are difficult to detect until stereoscopic images are generated.
Innovation Solution
A control apparatus with first and second driving units adjusts left and right optical systems independently, aided by a processor that acquires and displays focus position information, allowing users to manually adjust the left-right focus difference within a permissible range using a display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two actuators are used for autofocus to independently move left and right optical systems, then focus adjustment capability is improved, but power consumption increases and driving circuit becomes complicated
Solution Approach 1:
The patent divides the optical system into left and right channels, each with its own actuator for independent focus control. This segmentation enables separate adjustment of left and right focal points, solving the LR focus difference problem while maintaining the ability to perform autofocus on each side independently
Solution Approach 2:
The patent combines multiple functions into a single control apparatus that manages both autofocus and LR focus difference adjustment. The control apparatus integrates the driving logic for both actuators, allowing coordinated control that reduces overall system complexity and power consumption compared to fully independent control systems
2Ease of operation
If two actuators are used for autofocus to independently move left and right optical systems, then focus adjustment capability is improved, but driving circuit becomes complicated
Solution Approach 1:
The control apparatus performs multiple functions: it controls both actuators for autofocus, adjusts LR focus difference, and provides user interface management. This multi-functional integration reduces the need for separate control circuits and simplifies the overall driving circuit architecture
3Manufacturing precision
If LR focus difference is adjusted using a spacer during assembly, then manufacturing precision is improved, but the system cannot compensate for sensor tilting during attachment
Solution Approach 1:
The patent replaces static mechanical adjustment (spacers) with dynamic actuator-based focus control. The actuators can adjust focus positions in real-time, allowing the system to compensate for sensor tilting and LR focus differences that occur during camera attachment, while maintaining manufacturing precision through controlled adjustment
4Ease of operation
If user manually adjusts focus without feedback, then ease of operation is improved, but measurement precision of focus difference is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the control apparatus monitors the positions of both optical systems and provides real-time information to the user through the display unit. This feedback enables users to make precise adjustments by observing the actual focus difference, ensuring accurate LR focus matching while maintaining simple manual operation
5Device complexity
If focus adjustment is performed without real-time feedback, then device complexity is reduced, but difficulty of detecting and measuring focus difference increases
Solution Approach 1:
The display unit serves as an intermediary between the control apparatus and the user. It translates complex focus position data into visual information that users can easily interpret, making focus difference detection simple while keeping the underlying control system relatively simple
Data Source
AI summary
A control apparatus for an image display system that includes a first optical system configured to form a first optical image of an object, a second optical system configured to form a second optical image of the object, a first driving unit configured to move a first imaging position of the first optical image and a second imaging position of the second optical image, a second driving unit configured to move the second imaging position, and an operation unit operable to adjust the second driving unit includes a memory storing instructions, and a processor configured to execute the instructions to acquire information regarding the first imaging position and the second imaging position, and cause a display unit to display the information in a case where the second driving unit moves the second imaging position in accordance with an operation on the operation unit.