Optical Path Changing Device with Tri-Actuator Control
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Solution Overview
Problem
Existing optical path changing devices require complex control of multiple piezoelectric elements to move pixel positions, which is inefficient and difficult to manage.
Innovation Solution
An optical path changing device using a parallel plate glass with three actuators connected at vertices of an imaginary triangle, allowing the glass to be driven forward and backward, enabling easy control of image projection positions in two orthogonal directions by rotating about the center of gravity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If four piezoelectric elements are used to support the four corners of a parallel plate glass, then the pixel position can be moved, but the device complexity and control difficulty increase
Solution Approach 1:
The patent removes one actuator from the traditional four-corner support configuration, extracting the redundant element while maintaining the ability to move the parallel plate glass in two orthogonal directions. This reduces the actuator count from four to three, simplifying the control system while preserving functional capability.
Solution Approach 2:
The three actuators are strategically positioned at vertices of an imaginary triangle on the parallel plate glass, allowing each actuator to contribute to movement in both orthogonal directions through coordinated operation. This multi-functional arrangement enables two-dimensional pixel positioning with fewer actuators than traditionally required.
2Ease of operation
If multiple piezoelectric elements are controlled asymmetrically to move pixels, then pixel position adjustment is achieved, but the control complexity increases
Solution Approach 1:
The control system is segmented into independent actuator control channels, where each of the three actuators can be controlled independently. This segmentation allows for simpler control logic compared to asymmetric control of multiple piezoelectric elements, as each actuator's contribution can be calculated and applied separately.
Solution Approach 2:
The patent replaces complex asymmetric control mechanisms with a more straightforward actuator arrangement where three actuators at triangular vertices provide symmetric support points. This mechanical reconfiguration simplifies the control mathematics, allowing pixel movement to be achieved through more intuitive control parameters.
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 configuration simplifies the control of image projection by allowing two-dimensional movement of pixel positions using three actuators, enhancing the efficiency and accuracy of image projection.
Implementation Method 1
an optical member 108 having a parallel plate face for changing an optical path
Data Source
AI summary
The optical path changing device of the present disclosure includes an optical member having a parallel plate face for changing an optical path, and first, second, and third actuators. The first, the second, and the third actuators are connected with the optical member at first, second, and third vertices of a triangle imaginarily drawn on a plane parallel to the parallel plate face of the optical member. The first, the second, and the third actuators drive the optical member forward and backward in a normal direction of the parallel plate face at the first, the second, and the third vertices serving as points of load. The optical member has a center of gravity within the triangle when seen from the normal direction.