Backlight Reflector With Integrated Conductive Layer for EMI Shielding
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Solution Overview
Problem
Backlight modules in digital devices are vulnerable to electromagnetic interference (EMI) and electrostatic discharge (ESD), which can cause frame jitters and damage to integrated circuits and light-emitting diodes, leading to increased manufacturing costs and assembly complexity due to the need for additional conducting materials like metal housings or aluminum foil.
Innovation Solution
A reflector with an integrated electrical conduction layer that connects to the ground, reducing the impact of EMI and ESD by conducting static charges and eliminating the need for additional conducting materials, thereby simplifying assembly and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal housing is installed to protect against EMI and ESD, then protection reliability is improved, but device thickness increases
Solution Approach 1:
The patent merges the reflector and EMI/ESD shielding functions into a single integrated component. The reflector is constructed with a conducting layer that serves dual purposes: reflecting light from the backlight module and providing electromagnetic interference and electrostatic discharge protection. This eliminates the need for separate metal housing while maintaining protection reliability.
Solution Approach 2:
The reflector is designed with multi-functionality, simultaneously performing light reflection, EMI shielding, and ESD protection. The conducting layer within the reflector structure enables it to fulfill multiple roles that previously required separate components, thereby reducing overall device thickness while maintaining protective functions.
2Reliability
If additional conducting materials are installed to protect against EMI and ESD, then protection reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple protective functions into the reflector component, eliminating the need for separate metal housings or additional conducting materials. This integration reduces material costs and simplifies the manufacturing process while maintaining comprehensive protection against EMI and ESD.
Solution Approach 2:
The reflector is designed as a multi-functional component that provides light reflection, EMI shielding, and ESD protection simultaneously. This universality reduces the total quantity of materials needed and simplifies assembly procedures, thereby reducing manufacturing costs while maintaining protection reliability.
3Object-affected harmful factors
If sheet of aluminum foil is used to cover circuit for EMI protection, then EMI protection is improved, but assembly steps increase
Solution Approach 1:
The patent integrates the EMI shielding function directly into the reflector structure, eliminating the need for separate aluminum foil coverage. The conducting layer within the reflector provides EMI protection as an inherent feature, reducing assembly steps while maintaining protection effectiveness.
Solution Approach 2:
The reflector is designed to simultaneously perform light reflection and EMI shielding functions. This multi-functionality eliminates the need for additional separate components like aluminum foil, thereby reducing assembly complexity and the number of steps required during manufacturing.
4Reliability
If metal housing is installed to reflect light and protect against EMI/ESD, then protection reliability and optical performance are improved, but device thickness increases
Solution Approach 1:
The patent merges the light reflection function and EMI/ESD protection function into a single reflector component. The conducting layer integrated within the reflector structure enables it to simultaneously reflect light and provide electromagnetic shielding, eliminating the need for separate metal housing and reducing device thickness.
Solution Approach 2:
The reflector is designed as a multi-functional component that performs optical reflection and electromagnetic protection simultaneously. This integration maintains both optical performance and protection reliability while reducing the overall thickness compared to using separate metal housing components.
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 protects backlight modules from EMI and ESD, reducing assembly steps and manufacturing costs while maintaining normal device operations, thus enhancing manufacturing throughput.
Implementation Method 1
by conducting static charges to the ground of the backlight module in terms of the electrical conduction layer
Implementation Method 2
a reflection layer and an electrical conduction layer. The electrical conduction layer is installed on one side of the reflection layer
Data Source
AI summary
A reflector in a backlight module comprises a reflection layer and an electrical conduction layer. The conducting is installed on one side of a reflection layer, and is connected to the ground of the system. Thereby, when the reflector is applied to an edge-type or a direct-type backlight module, by grounding the electrical conduction layer, normal operations of devices in the backlight module will not be affected by electromagnetic interference (EMI) or electrostatic discharge (ESD).