Detachable LED Driver for Display Power Supply
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Solution Overview
Problem
Existing display devices using liquid crystal displays require separate backlights, with cold cathode fluorescent lamps being environmentally harmful and inefficient, while LED backlights are more suitable but require individually designed driving circuits for different types, leading to increased development and maintenance costs.
Innovation Solution
A power supply system that includes a separable LED driver capable of generating constant current for LED backlights, with a detachable design allowing for commonization of the main circuit board and reduced development costs, and the ability to upgrade the backlight driving circuit independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If LED backlight is used instead of CCFL, then environmental friendliness and color reproduction are improved, but individual LED driver circuit design for different driving types increases device complexity and development cost
Solution Approach 1:
The LED driver circuit is segmented into a detachable module that can be separated from the main circuit board. This module includes the LED driving circuit and connection terminals, allowing it to be independently designed, tested, and replaced without affecting the main power supply circuitry. The segmentation enables standardized interfaces that can accommodate different LED driving types through modular variations.
Solution Approach 2:
The power supply circuit board is designed with universal functionality to support multiple LED driver types through a standardized interface. The main circuit board includes generic power generation and distribution circuits that can work with different LED driver modules (e.g., constant current, pulse width modulation, or other driving types). This universality reduces the need for multiple specialized power supply designs.
2Adaptability or versatility
If separate power supplies are designed for different LED driver types, then specific driving requirements are met, but development cost and maintenance complexity increase
Solution Approach 1:
The LED driver is segregated into a separate detachable module with standardized connection interfaces. This allows the main power supply circuit board to be manufactured as a universal platform that can support various LED driver modules. Different LED driver types can be developed as independent modules that connect to the same power supply interface, reducing overall development costs through platform standardization.
Solution Approach 2:
The LED driver circuit is extracted from the integrated power supply design and placed in a separate detachable module. This extraction allows the power supply circuit board to be designed once as a universal platform, while different LED driver functionalities can be developed independently as separate modules. This reduces development costs by avoiding redundant power supply circuit design for each LED driver type.
3Device complexity
If LED driver is integrated with power supply, then compact design is achieved, but maintenance difficulty increases as entire power supply must be replaced
Solution Approach 1:
The LED driver is segmented into a detachable module that can be independently removed from the power supply circuit board. The module includes connection terminals that interface with the main board, allowing the LED driver to be replaced without disturbing the power generation and distribution circuits. This segmentation maintains a compact overall design while enabling selective replacement of only the faulty component.
Solution Approach 2:
The connection between the LED driver module and power supply circuit board is designed to be dynamically changeable through detachable terminals. This allows the system to transition between integrated operation and separated maintenance states. During normal operation, the modules work together as a compact unit; during maintenance, the LED driver module can be easily detached and replaced without affecting the power supply circuit board.
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 solution reduces the complexity and cost of developing power supplies for LED-driven displays, allows for easier maintenance by enabling replacement of only the faulty backlight module, and supports various LED driving types through a commonized power supply architecture.
Implementation Method 1
a power generator arranged on the circuit board, the power generator configured to generate a DC voltage
Implementation Method 2
an LED driver detachably attached to the circuit board, the LED driver configured to generate constant current to be provided to an LED backlight using the generated DC voltage
Implementation Method 3
an LED backlight configured to emit light incident on the panel
Data Source
AI summary
A display device is provided, which includes a panel configured to display an image using an LED backlight configured to emit light incident on the panel, an image signal interface configured to provide an image signal to the panel, and a power supply including an LED driver configured to generate constant current, wherein the LED driver is detachable from the power supply.