Multi-Stage Input Device Light-Shielding Member Design
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Solution Overview
Problem
Existing multi-stage electronic lighting modules in input devices suffer from light leakage issues due to interference between light beams emitted by different electronic lighting elements, which are not effectively blocked by conventional partition plates made of transparent materials.
Innovation Solution
The input device incorporates a light-shielding member with channels and ribs, combined with a light guide member and case ribs, to prevent light beams from being scattered to adjacent light guide posts, minimizing interference and leakage by embedding case ribs between light guide posts and using additional upper light-shielding ribs to block scattered light within the light guide platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If partition plates are used to block light beams, then light leakage is reduced, but light beams are still scattered through transparent partition plates
Solution Approach 1:
The partition plate material is changed from transparent to light-shielding (opaque), fundamentally altering its optical properties to block light beams effectively. This parameter change resolves the contradiction by making the partition plate capable of truly blocking light rather than merely reducing scattering.
Solution Approach 2:
The light-shielding member is formed as an integrated structure combining multiple functional elements (channels for light guide posts, light-shielding ribs for blocking scattered light, and board hole reception). This composite structure provides both light blocking and structural integration, resolving the contradiction between reducing light leakage and ensuring light signal clarity.
2Adaptability or versatility
If multiple electronic lighting elements are used to generate multi-stage light signals, then functionality is enhanced, but light beams interfere with each other causing light leakage
Solution Approach 1:
The light-shielding member is segmented into multiple channels, each accommodating a specific light guide post. This segmentation creates isolated pathways for each light beam, preventing interference between multiple electronic lighting elements while maintaining the multi-stage light signal capability.
Solution Approach 2:
The light-shielding member acts as an intermediary structure between multiple electronic lighting elements and the external environment. It mediates the light beams by providing separate channels and light-shielding ribs that prevent direct interference between adjacent light sources while allowing each to function independently.
3Illumination intensity
If light guide posts are made transparent to guide light beams, then light transmission is improved, but light beams scatter to adjacent light guide posts
Solution Approach 1:
The light-shielding member provides localized light blocking at critical positions (between adjacent light guide posts and at the board interface) while maintaining transparency of the light guide posts themselves. This local quality approach preserves light transmission efficiency through the light guide posts while eliminating scattering to adjacent posts through targeted light shielding.
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 significantly reduces light leakage, allowing for clear and distinct multi-stage light signals to be generated without interference, enhancing the functionality and usability of input devices like mice and keyboards.
Implementation Method 1
The light guide member includes a light guide platform, multiple upper light guide posts for guiding the first and second light beams, and multiple lower light guide posts for guiding the first and second light beams
Implementation Method 2
The light-shielding member is arranged between the light guide member and the printed circuit board and includes multiple channels and a light-shielding rib
Data Source
AI summary
The present invention relates to an input device having a multi-stage indicating lamp. The input device includes a case and an electronic lighting module. The electronic lighting module includes a printed circuit board, a first electronic lighting element, a second electronic lighting element, a light guide post member, a light-shielding member, a lamp cover and a button. By means of the light guide post member and the light-shielding member, the possibility of scattering the light beams is reduced.