Optical Touch Module Sensor Rotary Angle Adjustment
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Solution Overview
Problem
Conventional optical touch modules face challenges in maintaining accurate touch detection due to deviations in the view range caused by variations in design and mechanical alignment, leading to incomplete coverage of the touch panel and reduced detection accuracy.
Innovation Solution
A method for adjusting the horizontal and vertical rotary angles of the optical touch module's sensor, allowing it to move relative to the panel and calculate optimal angles based on panel dimensions and sensor positions, ensuring full coverage of the touch area by using tables to determine precise adjustments for the sensor's position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical touch module position is varied according to design demand, then the circuit design and mechanical design requirements are met, but the view range of the optical touch module deviates from the predetermined view angle, causing incomplete coverage of the panel
Solution Approach 1:
The patent introduces adjustable mounting structures that allow the optical touch module to dynamically change its installation angle and position. The module can be rotated and tilted to different angles within a certain range, enabling it to adapt to various design requirements while maintaining accurate view range coverage. This dynamic adjustment capability resolves the contradiction by allowing the same module to satisfy both circuit/mechanical design variations and precise view angle requirements.
2Reliability
If the optical touch module is disposed at a corner of the panel, then the view range can cover the panel, but the position must be precisely aligned, which increases assembly difficulty and reduces manufacturing flexibility
Solution Approach 1:
The patent employs adjustable mounting mechanisms that allow changing of installation parameters including angle, position, and orientation of the optical touch module. The module can be mounted at different angles (e.g., 0-45 degrees adjustable range) and positions while maintaining proper view range coverage. This parameter adjustability enables manufacturers to accommodate variations in panel dimensions and design requirements without requiring precise pre-alignment, thereby improving both assembly flexibility and coverage accuracy.
3Ease of operation
If the view range of the optical touch module does not fully cover the panel, then the module can be positioned for circuit and mechanical design, but the touch detection accuracy is reduced at the boundaries
Solution Approach 1:
The patent introduces additional adjustment dimensions including rotational angle and tilt angle, transforming a single-position mounting system into a multi-dimensional adjustable system. By adding these angular dimensions to the mounting options, the optical module can be oriented to ensure full panel coverage even when positioned for different circuit and mechanical design configurations, thereby maintaining touch detection accuracy across the entire panel surface.
Data Source
AI summary
A method of adjusting a rotary angle of an optical touch module is disclosed in the present invention. The method includes measuring a length and a width of a panel; measuring a first moving distance and a second moving distance of a sensor of the optical touch module as moving from the first position to the second position; calculating a first projecting distance and a second projecting distance of the sensor at the first position according to the length and width of the panel; calculating a first angle and a second angle of the sensor at the second position according to the first moving distance, the second moving distance, the first projecting distance and the second projecting distance; and calculating the rotary angle of the sensor that moves from the first position to the second position according to the first angle and the second angle.