Movable Galvano-Mirror Detection Accuracy via Dynamic Sensor Positioning
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Solution Overview
Problem
Existing light scanning devices face reduced detection accuracy of the maximum deflection angle when the maximum displacement angle of galvano-mirrors changes, particularly at larger angles, due to the fixed position of optical sensors relative to the screen.
Innovation Solution
A light scanning device with a movable section that includes a light reflection section and a detection section, where the detection section consists of a light source, a light-receiving section, and a displacement drive section. The displacement drive section adjusts the position of the light-receiving section to maintain a constant ratio with the light source and oscillating axis, ensuring accurate detection of the maximum deflection angle even when it changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the maximum displacement angle of the galvano-mirror is changed to adjust image size, then the image size changes, but the detection accuracy of the maximum deflection angle is lowered
Solution Approach 1:
The light-receiving section is made movable by a displacement drive section, allowing its position to be dynamically adjusted according to the maximum deflection angle. This transforms the fixed detection system into a dynamic one that adapts to different scanning angles, maintaining detection accuracy across varying image sizes
Solution Approach 2:
The position parameter of the light-receiving section is changed in correspondence with changes in the maximum deflection angle. By adjusting the detection section's position parameter based on the scanning parameters, the system maintains optimal detection conditions regardless of the image size being displayed
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 maintains reliable detection accuracy of the maximum deflection angle across varying angles, preventing the decrease in detection precision observed in previous technologies, allowing for precise control and image formation on screens with changing maximum deflection angles.
Implementation Method 1
a light source which irradiates light toward the light reflection section, a light-receiving section which receives reflected light of the light from the light source, reflected by the light reflection section
Data Source
AI summary
A light scanning device includes: a movable section which has a light reflection section reflecting light and oscillates around an oscillating axis and in which a maximum deflection angle thereof is variable; and a detection section which detects the maximum deflection angle of the movable section, wherein the detection section includes a light source which irradiates light toward the light reflection section, a light-receiving section which receives reflected light of the light from the light source, reflected by the light reflection section, and a displacement drive section which changes a position of the light-receiving section in accordance with the maximum deflection angle of the movable section.