LED Assembly One-Sided PCB Line Arrangement
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Solution Overview
Problem
The existing LCD devices with LED assemblies face challenges in reducing the number of input and output lines on the PCB, leading to increased thickness and weight, particularly due to the need for multiple LEDs connected in series, which complicates voltage supply and results in a protruding PCB that increases the device's thickness.
Innovation Solution
The solution involves arranging LEDs in series within two arrays on a PCB, where the output terminal of one array faces the output terminal of another, with input and output lines positioned on one side of the PCB, allowing for reduced width and thickness by eliminating the need for a protruding portion in the bottom frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LEDs are connected in series to form arrays, then the light output is improved, but the number of input and output lines on the PCB increases, leading to increased device thickness and weight
Solution Approach 1:
The patent merges the input and output lines by positioning them on the same side of the PCB. Specifically, the input lines are arranged at one end of the PCB while the output lines are arranged at the other end, allowing both types of lines to be located on the same side rather than distributing them to opposite sides. This merging reduces the overall width required for line arrangement and eliminates the need for a protruding portion in the bottom frame, thereby reducing device thickness.
Solution Approach 2:
The patent transitions from a traditional arrangement where input and output lines are distributed to opposite sides of the PCB to a configuration where both lines are concentrated on the same side. This dimensional reorganization allows the lines to be arranged along the length of the PCB rather than requiring width space on both sides, effectively reducing the device footprint and thickness.
2Ease of manufacture
If input and output lines are arranged on opposite sides of the PCB, then electrical connections are simplified, but the PCB width and device thickness increase
Solution Approach 1:
The patent combines the arrangement of input and output lines on the same side of the PCB, specifically positioning input lines at one end and output lines at the other end. This merging allows both line types to be accommodated within the same side region, reducing the PCB width requirement and eliminating the need for a protruding portion in the bottom frame, thereby reducing device thickness without compromising electrical connection simplicity.
3Length of stationary object
If the PCB width is reduced to decrease device thickness, then the device becomes more compact, but the arrangement of input and output lines becomes more complex
Solution Approach 1:
The patent segments the PCB into distinct regions: an input line arrangement region at one end and an output line arrangement region at the other end. This segmentation allows input and output lines to be independently organized in dedicated zones, simplifying the overall arrangement process. The segmentation approach enables clear spatial separation of line types while maintaining a compact PCB width, avoiding the complexity of interwoven line arrangements.
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 reduces the thickness and weight of the LCD device by allowing input and output lines to be placed on one side of the PCB, minimizing the width and eliminating the protruding portion, thereby enhancing the device's compactness and reducing production costs.
Implementation Method 1
One of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp and an LED is used as a light source 29 of the backlight unit 20
Implementation Method 2
The light emitted from at least one LED assembly 29 is provided into the light guide plate 23. The light is processed into a plane light source having an uniform brightness through the light guide plate 23, the reflective sheet 25 and the optical sheet 21
Implementation Method 3
The reflective sheet 25 is disposed on the bottom frame 50 and has a color of white or silver
Implementation Method 4
The light is processed into a plane light source having an uniform brightness through the light guide plate 23, the reflective sheet 25 and the optical sheet 21
Implementation Method 5
An arrangement of the liquid crystal molecules in the liquid crystal layer is changed by an electric field induced in the liquid crystal panel to control light transmissivity
Implementation Method 6
The LCD device, which uses an optical anisotropy and a polarization property to display an image
Implementation Method 7
The LCD device, which uses an optical anisotropy and a polarization property to display an image
Data Source
AI summary
A light emitting diode (LED) assembly includes a printed circuit board; first and second LED arrays arranged on the printed circuit board and each including a plurality of LEDs, wherein the LEDs in each of the first and second LED array are connected to each other in series, and an output terminal of the first LED array faces an output terminal of the second LED array; a first input line connected to an input terminal of the first LED array; a second input line connected to an input terminal of the second LED array; and one output line connected to the output terminal of the first LED array and the output terminal of the second LED array, wherein the first input line, the second input line and the one output line are disposed at one side of the printed circuit board with respect to the LEDs.