Light Indicator Module Shielding to Eliminate Bright and Dark Lines
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Solution Overview
Problem
Conventional light indicator modules in electronic devices suffer from bright and dark lines due to the emission characteristics of LED light sources, affecting visual aesthetics and product quality.
Innovation Solution
A light indicator module comprising a circuit board with light sources, a light guide unit with guiding blocks having specific side surfaces, and a shielding material that covers the abuttal side surfaces to prevent light interference between guiding blocks, reducing bright and dark lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LED light sources are used in light indicator modules, then the light bar can be formed with indicating function, but bright lines and dark lines appear affecting visual aesthetics
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the LED light sources and the display surface. The light guide plate receives light from multiple LEDs and distributes it uniformly across the light bar, preventing direct light leakage and eliminating bright/dark lines caused by individual LED emission characteristics
Solution Approach 2:
The light guide plate is designed with varying local optical properties - including light entering surfaces, light emitting surfaces, and light blocking surfaces in different regions. This local quality variation enables precise control of light distribution to eliminate uniformity issues across the light bar
2Loss of information
If multiple LED light sources are arranged in segments, then indicating function is achieved, but light interference between adjacent LEDs creates bright and dark lines
Solution Approach 1:
The light guide plate acts as a mediator that receives light from segmented LED sources and redistributes it uniformly. Light blocking surfaces within the light guide plate prevent light from one LED segment from interfering with adjacent segments, while light emitting surfaces ensure uniform light output across the entire light bar
Solution Approach 2:
The light guide plate is divided into multiple guiding blocks, each corresponding to a specific LED light source. Each guiding block has dedicated light entering surfaces and light emitting surfaces that control light from its corresponding LED, preventing cross-interference while maintaining overall uniformity
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 minimizes the occurrence of bright and dark lines in the light bar, enhancing visual aesthetics and product quality by preventing light source interference.
Implementation Method 1
The light guide unit includes a plurality of guiding blocks, wherein each guiding block has a light emitting surface, a light entering side surface, and at least one abuttal side surface. One of the light sources corresponds to the light entering side surface, and the light beam enters the guiding block through the light entering side surface and is emitted through the light emitting surface.
Implementation Method 2
The abuttal side surface faces toward an adjacent guiding block, and the shielding material covers the abuttal side surface. Therefore, by virtue of covering the abuttal side surface of the guiding block with the shielding material, the light source of different guiding block would not affect one another
Data Source
AI summary
A light indicator module is provided. The light indicator module includes a circuit board, a plurality of light sources, a light guide unit, and a shielding material. The light sources are disposed on the circuit board, and each light source provides a light beam. The light guide unit includes a plurality of guiding blocks. Each guiding block includes a light emitting surface, a light entering side surface, and at least one abuttal side surface. One of the light sources corresponds to the light entering side surface. The light beam enters the guiding block through the light entering side surface and is emitted through the light emitting surface. The abuttal side surface faces toward an adjacent guiding block. The shielding material covers the abuttal side surface.