Mouse Scanner Barrier Prevents Ghost and Hot Spot Phenomena
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Solution Overview
Problem
Conventional mice with scanning functions suffer from issues such as increased size and non-uniform luminance due to the positioning of the light source, leading to ghost and hot spot phenomena, which degrade scanning performance by causing brightness differences across the scan window.
Innovation Solution
The design incorporates a barrier with ribs to prevent ghost phenomena, obliquely installed light sources with diffusion lenses, and a larger mirror area than the field of view to ensure uniform light distribution and prevent dark edges in scanned images, along with a reflection layer on the glass module to disperse light evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light source is positioned close to the scan window, then the scanning function can be implemented, but ghost and hot spot phenomena occur leading to non-uniform luminance
Solution Approach 1:
A barrier member is introduced as an intermediary component between the light source and the scan window. This barrier includes a reflection surface that redirects light and a diffusion surface that scatters light to eliminate hot spots and ghost phenomena, thereby achieving uniform luminance across the scan window while maintaining the scanning function
Solution Approach 2:
The barrier member has different surface properties at different locations: one surface has high reflectivity to redirect light away from the camera, while another surface has diffusion properties to scatter light evenly. This local differentiation of optical properties solves the luminance uniformity problem
2Illumination intensity
If the mirror area is increased to cover the entire scan window, then uniform light distribution is achieved, but the device size increases
Solution Approach 1:
Instead of increasing the mirror area in the same plane, the solution uses a barrier member with specific surface properties that redirects and diffuses light in three-dimensional space. This approach achieves uniform light distribution without requiring a larger mirror or increasing the overall device volume
3Illumination intensity
If diffusion lenses are added to the light source, then light distribution is improved, but device complexity increases
Solution Approach 1:
The barrier member combines multiple functions into a single component: it acts as both a light redirecting element (through its reflection surface) and a light diffusing element (through its diffusion surface). This merged structure improves light distribution without requiring separate diffusion lenses, thereby avoiding increased device complexity
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 enhances scanning performance by maintaining uniform luminance across the scan region, preventing ghost and hot spot phenomena, and allowing for accurate image stitching and recognition, even when moving in curved paths.
Implementation Method 1
a mirror module installed in one sided portion of an upper side of the housing to reflect a scan image delivered from the glass module
Implementation Method 2
a lighting module installed in an inner upper side of the housing spaced apart from the camera module
Implementation Method 3
a barrier disposed in an inner upper side of the housing corresponding to a front side of the lighting module to block light reflected from an inside of the housing and formed on the camera module
Implementation Method 4
obliquely installed light sources with diffusion lenses
Implementation Method 5
a reflection layer on the glass module to disperse light evenly
Data Source
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AI summary
A mouse (10) having a scanning function is provided. The mouse (10) may include a base (16), a cover (11), a scan button (12), and a scanner (20). The scanner (20) may include a housing (21), a glass module (23), a mirror module (24), a camera module (22), a lighting module (25) provided in the housing (21), spaced apart from the camera module (22), and a barrier (26) provided in the housing (21), at a position corresponding to a front side of the lighting module (25), to block light reflected from an inside of the housing (21).