Backlight Module Back Plate Electrical Connection Design
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Solution Overview
Problem
Conventional backlight modules for liquid crystal displays are costly due to the use of connectors and connection wires, which are prone to damage and detachment, leading to reliability issues.
Innovation Solution
A backlight module design featuring a back plate with a metal and insulating portion, where electrical connection pads directly power the light emitting unit, eliminating the need for external connectors and wires, thereby reducing costs and preventing damage or detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connectors and connection wires are used to power the light emitting unit, then the electrical connection can be established, but the costs increase and reliability decreases due to wire folding damage or connector detachment
Solution Approach 1:
The patent merges the electrical connection function directly into the back plate structure by integrating conductive patterns that serve as both structural and electrical components. This eliminates the need for separate connectors and connection wires, thereby reducing device complexity while improving reliability by removing potential failure points associated with separate connection components.
Solution Approach 2:
The patent extracts the electrical connection function from separate external components (connectors and wires) and embeds it directly into the back plate. This extraction of the connection function from separate components eliminates the reliability issues associated with connectors and wires while maintaining the necessary electrical connectivity.
2Reliability
If connectors and connection wires are used to power the light emitting unit, then electrical connection is established, but material costs increase
Solution Approach 1:
The patent combines multiple functions (structural support and electrical connection) into the back plate itself, eliminating the need for separate connectors and wires. This merging reduces material costs by reducing the total number of components required while also improving reliability by eliminating connection-related failure modes.
Solution Approach 2:
The back plate is designed to serve multiple functions simultaneously: it provides structural support, acts as an electrical conductor through integrated conductive patterns, and serves as a mounting surface for other components. This multi-functionality eliminates the need for separate dedicated connection components, thereby reducing costs while maintaining reliability.
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
This design reduces the costs associated with connectors and wires, enhances reliability by eliminating wire folding damage and connector detachment, and improves the competitive position of the backlight module and display device.
Implementation Method 1
the first electrical connection pad and the second electrical connection pad are disposed on the first surface of the back plate and are electrically coupled to each other through the metal portion
Implementation Method 2
The LED light bar faces the light guide plate and is disposed on the back plate to output light rays to be incident into the light guide plate
Implementation Method 3
the light rays are emitted from the light output surface of the light guide plate through the total reflection of the light guide plate to provide the uniform surface light source to the display panel
Implementation Method 4
the reflective sheet can reflect the light rays emitted from the bottom surface of the light guide plate to the light guide plate to improve the availability of the light rays
Data Source
AI summary
A backlight module and a display device are provided. A back plate of the backlight module has a first surface and a second surface. The back plate comprises a metal portion and an insulating portion, and electrical connection pads are disposed in the insulating portion. The first and second electrical connection pads are disposed on the first surface and electrically coupled to each other. The third and fourth electrical connection pads are disposed on the second surface. The first electrical connection pad is correspondingly coupled to the third electrical connection pad, and the second electrical connection pad is correspondingly coupled to the fourth electrical connection pad. A driving circuit board comprises a fifth electrical connection pad. The fifth electrical connection pad is correspondingly coupled to the first electrical connection pad. A light emitting unit comprises a sixth electrical connection pad correspondingly coupled to the fourth electrical connection pad.