Terminals Engaged Light Guide Plate for Front Light Module
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Solution Overview
Problem
Existing front light modules for touch panels struggle to achieve low manufacturing costs, diverse light output, and uniformity while maintaining a good aesthetic appearance, often requiring numerous components or compromising on diversity and appearance to reduce costs.
Innovation Solution
A front light module utilizing a terminals engaged light guide plate with a single-sided light input design, featuring a first and second light guide sheet with taper sets arranged in a staggered manner, and a light bar with odd- and even-positioned light source groups to achieve diverse pattern display with reduced component count and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple components are used to achieve uniform light output and diverse patterns, then light uniformity and pattern diversity are improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines multiple light guide sheets into a single integrated structure where the first and second light guide sheets are laminated together. The taper sets from both sheets work cooperatively to guide light, eliminating the need for separate light guide components and reducing overall device complexity while maintaining light uniformity.
Solution Approach 2:
The light guide plate structure serves multiple functions simultaneously: it guides light from LEDs, creates uniform illumination, displays diverse patterns through different taper configurations, and integrates the functions of what would traditionally require separate components. The same laminated structure achieves both light uniformity and pattern diversity.
2Adaptability or versatility
If multiple components are used to achieve diverse light patterns, then pattern diversity is improved, but manufacturing cost increases
Solution Approach 1:
The light guide plate is segmented into multiple functional layers with different taper sets (first taper sets and second taper sets) that can be independently designed for different patterns. This segmentation allows diverse pattern capabilities while using a standardized lamination process for manufacturing, controlling costs.
Solution Approach 2:
Different patterns are achieved by changing the geometric parameters of the taper sets (angle, depth, distribution) rather than using completely different components. This allows pattern diversity through parameter variation of the same basic structure, simplifying manufacturing and reducing costs.
3Shape
If traditional light guide structures are used to achieve good appearance, then aesthetic appearance is improved, but production cost and complexity increase
Solution Approach 1:
Multiple light guide sheets are laminated into a single integrated plate that maintains the aesthetic qualities of traditional structures while simplifying assembly. The combined structure eliminates the need for separate assembly steps for multiple light guide components, reducing assembly complexity while preserving visual appearance.
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 reduces production costs and complexity while maintaining excellent light uniformity and diversity, enabling the display of various patterns with improved assembly efficiency and aesthetic appeal.
Implementation Method 1
a first light guide sheet, a second light guide sheet, and a light bar. The first light guide sheet is laid on the touch circuit substrate, the first light guide sheet includes a first light receiving lateral having a plurality of first taper sets
Implementation Method 2
an edge of the first light receiving lateral is protruded to form the first taper sets
Data Source
AI summary
A front light module includes a light guide sheet and a light bar. The light guide sheet has two light receiving laterals, a fold line, a first pattern area, and a second pattern area respectively located on two sides of the fold line. One light receiving lateral is protruded to form first taper sets, and the other is protruded to form second taper sets. The second pattern area is superimposed on the first pattern area, and the first and second tapers set are engaged and coplanar to form a light incident surface after folding along the fold line. The light bar provides light toward the light incident surface, the first pattern area is lit by the odd positions of the light bar via the first taper sets, and the second pattern area is lit by the even positions of the light bar via the second taper sets.