Lens Positioning Control for Projectors Using Segmented Axes
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Solution Overview
Problem
Existing optical devices, such as projectors, face challenges in accurately and efficiently adjusting the lens position due to interference from gravity and integrated dual-axis design, leading to inefficiencies in aligning the lens to a predetermined position.
Innovation Solution
A control method and system that includes a detector to monitor the lens position, a processor to calculate distances and determine if the lens is within a predetermined range, and a driving device to move the lens into an allowable range, alternately adjusting along both axes to minimize interference and achieve precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens is moved horizontally, then the horizontal position is adjusted, but the vertical position is affected due to integrated dual-axis design
Solution Approach 1:
The patent segments the lens adjustment system into independent horizontal and vertical adjustment mechanisms. Each axis has its own driving device and control logic, allowing horizontal and vertical movements to be controlled separately without mutual interference, thus resolving the positioning accuracy issue caused by the integrated design.
Solution Approach 2:
The patent introduces a sequential control approach where adjustments are made in distinct dimensional steps - first horizontal then vertical, or vice versa. This dimensional separation in the control process eliminates the coupling effect between axes that plagues the integrated design.
2Measurement precision
If the lens is moved vertically, then the vertical position is adjusted, but the horizontal position is affected due to integrated dual-axis design
Solution Approach 1:
The patent segments the lens adjustment system into independent horizontal and vertical adjustment mechanisms. Each axis has its own driving device and control logic, allowing horizontal and vertical movements to be controlled separately without mutual interference, thus resolving the positioning accuracy issue caused by the integrated design.
Solution Approach 2:
The patent introduces a sequential control approach where adjustments are made in distinct dimensional steps - first horizontal then vertical, or vice versa. This dimensional separation in the control process eliminates the coupling effect between axes that plagues the integrated design.
3Measurement precision
If the lens is adjusted manually to the predetermined position, then the positioning can be achieved, but it wastes more time to fix the issues caused by gravity and axis interference
Solution Approach 1:
The patent implements a feedback control system using a detector to monitor the lens position in real-time. The detector provides position information to the controller, which automatically adjusts the lens to the predetermined position, eliminating the time-consuming manual adjustment process while maintaining high positioning accuracy.
Solution Approach 2:
The system performs self-alignment through automatic control. The controller receives detector feedback and autonomously commands the driving devices to move the lens to the correct position, making the system self-sufficient without requiring manual intervention for positioning corrections.
4Measurement precision
If gravity interference is considered, then the lens positioning accuracy can be improved, but the adjustment process becomes more complex
Solution Approach 1:
The patent applies preliminary compensation for gravity effects. The system pre-calculates and compensates for gravity-induced position deviations before final positioning, allowing the lens to be accurately positioned without requiring complex real-time gravity compensation mechanisms.
Data Source
AI summary
A control method for an optical device includes a detector detecting a current position of a lens, a processor calculating a distance between the current position and a target position, the processor determining whether the current position is within a predetermined range according to the distance, and the processor controlling a driving device to move the lens into an allowable range according to whether the current position is within the predetermined range. The predetermined range and the allowable range are corresponding to the target position.