Modular LED Backlight Assembly with Rear Hinged Access
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Solution Overview
Problem
Current LED backlight systems for LCDs require the entire assembly to be replaced when individual LEDs fail, leading to wastage of functional LEDs and damage to fragile components, especially in larger displays, due to the need for complete disassembly in a clean room environment.
Innovation Solution
A modular backlight assembly comprising removable tiles of lights, where each tile can be replaced individually from the rear without disassembling the LCD, utilizing metal Printed Circuit Board technology for thermal management and electrical connectivity, allowing for efficient access and replacement without disturbing the delicate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire LED backlight assembly is replaced when LEDs fail, then reliability is improved, but loss of substance increases due to wastage of functional LEDs
Solution Approach 1:
The backlight assembly is divided into multiple independently replaceable modules, each containing a subset of LEDs. When LEDs fail, only the specific module containing the failed LEDs needs to be replaced, not the entire assembly. This segmentation allows functional LEDs in other modules to be retained and reused, reducing waste while maintaining system reliability.
2Reliability
If the entire LED backlight assembly is replaced, then reliability is improved, but loss of time increases due to complete disassembly requirements
Solution Approach 1:
The backlight is segmented into modular units that can be independently accessed and replaced. The movable element with hinge allows technicians to access and replace individual modules without disassembling the entire display, dramatically reducing maintenance time while ensuring reliability through proper replacement procedures.
Solution Approach 2:
The introduction of a movable element with hinge creates a dynamic access mechanism that allows the backlight modules to be easily opened and closed. This dynamic structure enables quick access to individual modules for replacement without permanent disassembly, reducing maintenance time while maintaining system integrity and reliability.
3Ease of operation
If complete disassembly is performed for LED replacement, then access to backlight is achieved, but object-affected harmful factors increase due to risk to fragile LCD components
Solution Approach 1:
The backlight system is segmented into modular units that can be accessed independently through the movable element. This segmentation allows technicians to work on specific modules without exposing the entire LCD assembly to potential damage, reducing harmful factors while maintaining ease of access for replacements.
Solution Approach 2:
The movable element with hinge acts as an intermediary mechanism between the technician and the backlight modules. It provides controlled access to the modules, allowing replacement work to be performed without direct manual handling of fragile LCD components, thereby reducing the risk of damage while maintaining operational ease.
4Loss of substance
If manual replacement of individual LEDs is performed, then loss of substance is reduced, but device complexity increases due to extensive manual labor and specialized equipment
Solution Approach 1:
The backlight is segmented into modules that contain multiple LEDs as integrated units. Instead of replacing individual LEDs manually, entire modules can be quickly swapped as pre-assembled units. This reduces the complexity of the replacement process while retaining functional LEDs in other modules, avoiding both the waste of complete replacement and the complexity of manual LED-by-LED replacement.
Solution Approach 2:
The modular design allows for replacement of entire LED modules as disposable-like units, rather than attempting complex manual replacement of individual LEDs. The modules are designed to be easily replaceable from the rear, simplifying the process while retaining functionality of other modules. This approach balances the complexity reduction with resource conservation.
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
Enables cost-effective and labor-efficient maintenance by allowing individual tile replacement, reducing waste and minimizing risk to the LCD, while maintaining thermal efficiency and electrical control through the use of metal PCB technology and accessible rear access mechanisms.
Implementation Method 1
The lights in the assembly may be any one of the following: LEDs, organic light emitting diodes (OLED), field emitting display (FED), light emitting polymer (LEP), and organic electro-luminescence (OEL)
Data Source
AI summary
Exemplary embodiments include a backlight assembly for an electronic display wherein said backlight assembly is comprised of a plurality of tiles. Each tile has a plurality of lights attached to it, such that when a single light or group of lights fail, the tile may be replaced without having to replace the entire backlight assembly. The lights in the assembly may be any one of the following: light emitting diodes (LED), organic light emitting diodes (OLED), field emitting display (FED), light emitting polymer (LEP), and organic electro-luminescence (OEL). Embodiments also allow tiles to be removed from the rear of the display and dissipate heat from the lights to the rear of the backlight assembly.