Liquid Crystal Panel Adjusting Mechanism for Focus and Pixel Alignment
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Solution Overview
Problem
There is a need for an adjusting mechanism that can effectively adjust the position of liquid crystal panels in an optical system of a projector, particularly for focus adjustment and pixel deviation correction, as existing methods lack a specific mechanism for this purpose.
Innovation Solution
The proposed adjusting mechanism includes a movable plate, a position adjusting actuator, and an elastic member, allowing for precise adjustments in multiple axes (θx, θy, Z, Y, X, and θz) by using a combination of linear movers and leaf springs, enabling the adjustment of liquid crystal panels with respect to a reference plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a specific adjusting mechanism is introduced for liquid crystal panel position adjustment, then focus adjustment and pixel deviation correction can be achieved, but device complexity increases
Solution Approach 1:
The adjusting mechanism is segmented into multiple independent actuators (first actuator for X-axis, second actuator for θz-axis, third actuator for Z-axis) that can adjust different positional parameters separately. This segmentation allows precise control of liquid crystal panel position while keeping each actuator relatively simple in structure.
Solution Approach 2:
The adjusting mechanism is designed to perform multiple functions: focus adjustment (Z-axis), pixel deviation correction (X-axis and θz-axis), and maintaining panel orientation. By integrating these functions into a single mechanism system, the patent avoids needing separate mechanisms for each function, thereby reducing overall device complexity while achieving high positioning precision.
2Stability of the object's composition
If traditional adjusting mechanisms with multiple guides and support structures are used, then stability is improved, but the size and weight of the projector increase
Solution Approach 1:
The patent replaces traditional mechanical adjusting mechanisms (which would require multiple guides, rails, and support structures) with piezoelectric actuators that use electro-mechanical conversion. This substitution dramatically reduces the mechanical structure size and weight while maintaining positioning stability through the precise control characteristics of piezoelectric materials.
Solution Approach 2:
The patent employs leaf springs as elastic members that provide flexible support and positioning for the liquid crystal panel. These thin, flexible elastic members replace bulky mechanical guides and support structures, significantly reducing the size and weight of the adjusting mechanism while maintaining the necessary stability and positioning accuracy.
3Volume of moving object
If piezoelectric actuators and leaf springs are used for adjustment, then device size and weight are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the unique properties of piezoelectric materials that convert electrical signals directly into precise mechanical displacement. By controlling the voltage applied to the piezoelectric actuators, the system achieves high positioning precision without requiring large mechanical structures. The leaf springs are also designed with specific elastic parameters to provide controlled flexibility that enhances positioning accuracy.
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
This mechanism allows for independent focus adjustment and pixel deviation correction, maintaining image quality over time, and reduces the size and weight of the projector by utilizing piezoelectric actuators and leaf springs, which minimize the need for additional guides and reduce thickness.
Implementation Method 1
an elastic member coupling the movable plate and the reference plate, the elastic member being elastically deformable
Implementation Method 2
utilizing piezoelectric actuators and leaf springs
Data Source
AI summary
An adjusting mechanism includes a movable plate having a substantially rectangular shape and including a long side and a short side, a position adjusting actuator configured to come into contact with and press the movable plate, a reference plate on which the movable plate is placed, and an elastic member coupling the movable plate and the reference plate, the elastic member being elastically deformable in a direction along an X axis. The position adjusting actuator adjusts a position of the movable plate with respect to the reference plate when the position adjusting actuator presses the movable plate in the direction along the X axis and moves the movable plate in the direction along the X axis and a θz direction.