LED Backlight Assembly Lateral Driving Board Placement
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Solution Overview
Problem
The existing LED backlight assemblies for LCDs are bulky and difficult to assemble due to the lengthy cable connections between the LED driving board and the PCB, which affects luminance uniformity and increases the thickness of the backlight assembly.
Innovation Solution
The LED PCB connector is placed closer to the edge of the LED array, and the LED driving board is positioned within a lateral space of the bottom container, allowing for a shorter cable connection and a more compact design, with the driving board and its shield located to minimize electromagnetic radiation exposure and mechanical impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the LED driving board is fixed on the outer surface of the bottom plane and electrical parts are outwardly extended, then the connection between LED driving board and LED-PCB is achieved, but the thickness of the backlight assembly is increased
Solution Approach 1:
The LED driving board is relocated from the outer surface (vertical dimension) to the lateral space (horizontal dimension) of the bottom container. This dimensional transition allows electrical parts to be arranged horizontally rather than extending outward vertically, thereby reducing the thickness of the backlight assembly while maintaining connection functionality.
2Illumination intensity
If the LED-PCB connector is located beyond the edge LED by a longer distance, then sufficient luminance at the edge area is achieved, but the cable connection becomes more lengthy and assembly more difficult
Solution Approach 1:
The LED driving board is repositioned within the lateral space of the bottom container, changing its spatial relationship with the LED-PCB connector. This allows the cable to connect within the same horizontal plane rather than spanning across different surfaces, reducing cable length and simplifying assembly while maintaining adequate luminance distribution.
3Ease of manufacture
If the LED driving board is separated from the LED-PCB by the bottom plane, then electrical connection is achieved, but the cable becomes very lengthy and connection becomes very difficult
Solution Approach 1:
The LED driving board and LED-PCB are both positioned within the lateral space of the bottom container, merging their locations into the same spatial region. This eliminates the need for the cable to traverse through the bottom plane thickness, significantly reducing cable length and simplifying the connection process.
4Object-generated harmful factors
If additional side mold is introduced to hide the connector, then the connector is hidden, but the plane of the backlight assembly and LCD is increased
Solution Approach 1:
The connector is relocated to the lateral space within the bottom container rather than being positioned on the outer surface. This internal positioning hides the connector within the existing structural volume of the bottom container, eliminating the need for additional side molds and avoiding any increase in the overall plane area of the backlight assembly.
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 configuration enhances luminance uniformity, reduces the bulkiness of the backlight assembly, and simplifies the assembly process while maintaining the compactness of the LCD.
Implementation Method 1
Another type of light source is a light emitting diode (LED), which has been gaining popularity because the LED is superior to a CCFL in reproducing color and consumes less electricity.
Data Source
AI summary
A light emitting diode (“LED”) backlight assembly. The LED backlight assembly has a bottom container which has a bottom plate and a side edge surrounding the bottom plate, a plurality of light emitting diode printed circuit boards (“LED-PCBs”) on the bottom plate, and a connector which is closely located to edge located LEDs. The connector of the LED-PCB is closely located to an LED driving board, which is disposed at a lateral space of a lateral part of the bottom container to limit a vertical thickness of the backlight light assembly.