Light Guide Module Light Shielding Structure
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Solution Overview
Problem
Conventional reflected mirrors in image scanning devices suffer from erratic reflections and noise signals due to excessive size, leading to blurred images and increased fabrication and assembly complexities, particularly when trying to shrink mirror size to improve design efficiency.
Innovation Solution
A light shielding structure is integrated onto the excessive area of the reflected mirrors to absorb erratic light and noise signals, maintaining the original mirror size and avoiding the need for redesign or recalibration, using methods such as a black covering sleeve, black printing, or bonded light shielding paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the reflected mirrors are made too big, then the light reflection coverage is sufficient, but erratic light reflection and noise signals occur leading to blurred images
Solution Approach 1:
The patent applies local quality by adding light shielding structures (black covering sleeves, black printing, or bonded light shielding paper) to specific excessive areas of the reflected mirrors. This allows the mirror surface to have different properties in different regions: the necessary reflective area maintains its reflective property while the excessive areas gain light-absorbing properties, preventing erratic reflections without reducing the functional mirror size
Solution Approach 2:
The patent extracts the harmful excessive areas of the reflected mirrors by applying light shielding structures that absorb stray light. This separates the useful light reflection function from the harmful erratic reflection, allowing the mirror to perform only its intended function without generating noise signals or blurred images
2Volume of moving object
If the reflected mirrors are shrunk to reduce device size, then compact design is achieved, but mirror shattering and fabrication complexity increase
Solution Approach 1:
The patent segments the mirror system into two functional parts: the original reflected mirror that performs light reflection and the added light shielding structure that absorbs stray light. This segmentation allows the mirror to maintain its original size for durability while the shielding structure provides the necessary light control, avoiding the need to shrink the fragile mirror itself
3Measurement precision
If the reflected mirrors are made smaller to improve calibration accuracy, then positioning precision is improved, but mirror fragility and assembly difficulty increase
Solution Approach 1:
The light shielding structure acts as an intermediary element that does not interfere with the calibration of the reflected mirror itself. By placing the shielding structures on the excessive areas, the patent allows the mirror to be calibrated once and maintain its positioning, while the shielding structures passively prevent erratic reflections without requiring recalibration or affecting mirror durability
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
The solution effectively prevents unnecessary light from reaching the image sensing device, enhancing scanning quality, simplifying fabrication and assembly, and reducing costs by maintaining the original mirror size and configuration.
Implementation Method 1
A light shielding structure is integrated onto the excessive area of the reflected mirrors to absorb erratic light and noise signals
Data Source
AI summary
A light-guide module is used for guiding the incident light to a process device. The light-guide module includes an entrance and a plurality of reflected mirrors. The entrance is provided for entering the signal light. The reflected mirrors are arranged as a predetermined light route for guiding out the signal light. One of the reflected mirrors includes a light shielding structure for preventing the noise reflecting from the reflected mirror so as to prevent the noise light from entering the image sensing device and to prevent the image sensing device to process the noise.