Fingerprint Module Light Guide with Segmented Flexible Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fingerprint identification modules on electronic devices face challenges in clearly indicating the identification area to users, affecting the brightness and luminous uniformity of the recognition process.
Innovation Solution
A fingerprint identification module design incorporating a transparent light guiding member with a protruding edge and through-hole, a flexible circuit board, and light emitting members, where the flexible circuit board and light emitting members are strategically positioned to enhance light path visibility and distribution, preventing obstruction and improving brightness and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible circuit board is positioned in the light guiding member, then the electrical connection is achieved, but the light path is blocked and brightness is reduced
Solution Approach 1:
The flexible circuit board is divided into multiple portions (first portion, second portion, third portion, fourth portion) that are arranged in sequence. The first portion exits through the first through-hole while the other portions are positioned in the first space, separating the electrical connection function from the light transmission path.
Solution Approach 2:
The circuit board portions are arranged in different spatial dimensions and orientations within the light guiding member, with some portions facing different directions, allowing electrical connections without blocking the primary light path.
2Illumination intensity
If the light emitting members are positioned in the light guiding holes, then light emission is achieved, but the light distribution uniformity is poor
Solution Approach 1:
Different portions of the flexible circuit board are positioned at different locations within the light guiding member, with the second and fourth portions facing the bottom and the third portion facing the opposite direction, creating localized light emission zones that collectively achieve uniform illumination.
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 design effectively indicates the identification area by enhancing brightness and luminous uniformity, facilitating clear user interaction with the fingerprint recognition module.
Implementation Method 1
a light guiding member (10), wherein the light guiding member is made of a transparent material
Data Source
AI summary
A fingerprint identification module includes a light guiding member, a flexible circuit board, two light emitting members, and a fingerprint identification chip. The light guiding member includes a bottom and a protruding edge. The protruding edge surrounds to form a first space. A first through-hole is formed on the bottom. The flexible circuit board is disposed in the first space and has a first portion, a second portion, a third portion, and a fourth portion connected in sequence. The first portion goes out of the light guiding member through the first through-hole. The third portion faces a direction opposite to the bottom. The second portion and the fourth portion face the bottom of the light guiding member. The light emitting members are disposed on the flexible circuit board and face the light guiding member. The fingerprint identification chip is disposed on the third portion of the flexible circuit board.