Backlight Module Connector Voltage Conversion PCB Size
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Solution Overview
Problem
The existing socket-type connectors for backlight modules in LCD devices require high-voltage insulating structures and large PCBs to prevent electric shock during assembly, which complicates the assembly process and hinders the development of thinner devices due to the need for bulky components and space-consuming step-up devices.
Innovation Solution
A connector with voltage-converting function that includes a voltage-converting module to boost low-voltage signals from the inverter to high-voltage signals for driving lamps, eliminating the need for bulky insulating structures and reducing PCB size by integrating the voltage-conversion function within the connector, allowing safer and more efficient assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a socket-type connector with high-voltage insulating structure is used to prevent electric shock during assembly, then safety is improved, but the PCB size increases and device thickness increases
Solution Approach 1:
The patent extracts the step-up circuit function from the PCB and relocates it to a separate voltage converter module. This separation eliminates the need for high-voltage insulating structures on the PCB, as the voltage conversion occurs in an isolated module with built-in insulation, thereby reducing PCB size while maintaining safety
Solution Approach 2:
The patent introduces a voltage converter module as an intermediary component between the low-voltage inverter and the high-voltage lamp. This module performs voltage conversion in a isolated housing with integrated insulating structures, acting as a mediator that transfers power while maintaining safety without requiring the PCB to handle high voltages directly
2Adaptability or versatility
If a step-up device is integrated into the inverter on the PCB to perform voltage-conversion, then voltage-conversion function is achieved, but the PCB size increases and assembly complexity increases
Solution Approach 1:
The patent segments the backlight module into distinct functional modules: the inverter on the PCB, the voltage converter module with step-up circuit, and the lamp assembly. This segmentation allows the voltage-conversion function to be achieved while keeping the PCB size minimal, as the bulky step-up device is housed in a separate module
Solution Approach 2:
The patent extracts the step-up circuit from the PCB and places it in a separate voltage converter module. This extraction removes the space-consuming inductors, transformers, and insulating structures from the PCB, allowing the PCB to remain compact while still achieving voltage conversion through the external module
3Adaptability or versatility
If the inverter includes a step-up device for voltage-conversion, then high-voltage signal generation is achieved, but assembly time increases due to welding requirements
Solution Approach 1:
The patent merges the voltage conversion function with the connector assembly by integrating the step-up circuit into the voltage converter module that also serves as the connection interface. This combination eliminates the need for separate welding operations, as the module uses plug-and-play connectors with built-in electrical contacts, thereby reducing assembly time while maintaining high-voltage signal generation capability
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 solution enhances safety by eliminating high-voltage contact risks and reduces PCB size, leading to cost savings and device miniaturization by removing the need for step-up circuits in the inverter, thus facilitating the development of thinner LCD devices.
Implementation Method 1
The voltage-converting module includes an input end for receiving the first voltage; and an output end for outputting the second voltage
Data Source
AI summary
A backlight module includes a connector capable of performing voltage conversion or a voltage converter capable of transmitting signals. The connector or the voltage converter, disposed between an inverter and a lamp set, receives low-voltage signals generated by the inverter, performs voltage conversion, and outputs high-voltage signals for driving the lamp set.