Backlight Module Silver Reflective Layer Grounding via Through Hole
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Solution Overview
Problem
Metal wires in display devices are damaged due to electrostatic shocks caused by accumulated electric charges in the silver reflective layer of the backlight module, leading to capacitance and electrical coupling with other components.
Innovation Solution
A backlight module design that includes a silver reflective layer grounded through holes in the polyester and anchor coat layers, allowing electric charges to be discharged, preventing electrostatic shocks and protecting other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the silver reflective layer is used in the backlight module, then the manufacturing cost is reduced and the structure is simplified, but electric charges accumulate in the silver reflective layer causing electrostatic shocks that damage metal wires
Solution Approach 1:
An insulating layer is introduced as an intermediary between the silver reflective layer and the metal wire. This insulating layer acts as a mediator that prevents direct electrical contact while allowing the silver reflective layer to maintain its reflective function, thereby eliminating electrostatic shock damage to wires
Solution Approach 2:
The harmful electrical conductivity property of the silver reflective layer is extracted and isolated from the metal wire through the introduction of an insulating layer. This separates the reflective function from the electrical conduction path, preventing charge accumulation from damaging the wire
2Device complexity
If the silver reflective layer is exposed at the edges after cutting, then the manufacturing process is simplified, but capacitance is formed causing electrostatic shocks that damage components
Solution Approach 1:
The insulating layer serves as a mediator that extends to the edges of the silver reflective layer, preventing capacitance formation at the exposed edges while maintaining the simplicity of the overall structure
Solution Approach 2:
The insulating layer is applied in advance to the silver reflective layer before any cutting or assembly operations. This preliminary action ensures that capacitance and electrostatic shocks are prevented from the beginning, protecting components throughout the manufacturing process
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 grounding of the silver reflective layer effectively discharges electric charges, preventing damage to other components and ensuring the backlight module's protection against electrostatic shocks.
Implementation Method 1
the grounding wire is electrically connected to the silver reflective layer via the through hole... effectively discharges electric charges, preventing damage to other components
Implementation Method 2
a silver reflective layer disposed on the top coat layer
Data Source
AI summary
A backlight module and a display device are provided in the present invention. The backlight module includes a bottom polyester layer, an adhesive layer, a top coat layer, a silver reflective layer, an anchor coat layer, a polyester layer, and a grounding wire which overlap each other in sequence. A through hole in contact with the silver reflective layer is formed through the polyester layer and the anchor coat layer. The grounding wire is electrically connected to the silver reflective layer via the through hole.