Optical Touch Control Apparatus Using Light Guide Module
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Solution Overview
Problem
Conventional touch control apparatuses, such as resistance-type and capacitance-type, require physical contact and conductivity, are costly to manufacture, and lack the capability to detect movement without pressure or conductivity.
Innovation Solution
An optical touch control apparatus using a light guide module and image sensor module to detect movement without physical contact, employing an infrared light source and feedback control circuit, allowing for the generation of electronic signals for cursor control and three-dimensional information processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resistance-type or capacitance-type touch control apparatus is used, then touch control functionality is achieved, but manufacturing cost increases and the input device must exert pressure or be conductive
Solution Approach 1:
The patent replaces the mechanical/electrical touch detection systems (resistance-type or capacitance-type) with an optical detection system. The optical touch control apparatus uses a light guide module and image sensor module to detect the movement of an input device optically, eliminating the need for pressure-sensitive circuits or conductive materials, thereby reducing manufacturing cost and simplifying the apparatus.
Solution Approach 2:
The patent introduces an optical intermediary (light guide module and image sensor module) between the user and the control system. Instead of direct electrical contact, the system uses light reflection and optical detection to mediate the interaction, allowing non-conductive objects to control the interface without physical pressure on circuitry.
2Adaptability or versatility
If optical detection method is used, then pressure-free and non-conductive input is enabled, but additional optical components are required
Solution Approach 1:
The optical touch control apparatus achieves universal compatibility with various input devices (conductive or non-conductive, pressure-applying or pressure-free) by using optical detection. The light guide module and image sensor module can detect any object that interacts with the light field, making the system adaptable to diverse input methods while maintaining a unified detection mechanism.
3Measurement precision
If conventional touch control apparatus is used, then simple structure is maintained, but detection capability is limited to pressure or conductivity
Solution Approach 1:
The patent substitutes mechanical pressure detection or electrical conductivity detection with optical detection. The image sensor module captures optical information about the input device's movement, providing precise detection capabilities without relying on physical contact or electrical properties, thereby enhancing measurement precision while using a different detection paradigm.
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
Enables cost-effective, pressure-free, and non-conductive touch control with enhanced functionality, including three-dimensional movement detection, suitable for various applications like touchpads and touch screens.
Implementation Method 1
a light guide module having an optical information capturing position, the light guide module guiding light to the optical information capturing position
Implementation Method 2
an image sensor module for sensing the optical information, and generating an electronic signal according to the optical information
Implementation Method 3
the optical touch control apparatus comprises an infrared light source
Implementation Method 4
the optical touch control apparatus may further comprise a feedback control circuit which controls illumination of the light source according to the optical information generated by the light guide module
Data Source
AI summary
The present invention discloses an optical touch control apparatus, comprising: a light guide module having an optical information capturing position, the light guide module guiding light to the optical information capturing position, and generating optical information according to light input through or reflected from the optical information capturing position; and an image sensor module for sensing the optical information, and generating an electronic signal according to the optical information.