Backlight Apparatus LED Driver Integration
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Solution Overview
Problem
Conventional direct-type backlight apparatuses face challenges in maintaining uniform light emission due to varying luminous efficiency of LEDs, which requires complex cabling and reduced control flexibility when light source drivers and LEDs are on different carrier boards.
Innovation Solution
The design integrates light source drivers and LEDs on the same circuit board, with multiple signal loops connecting them in series, reducing the number of conductors needed and allowing for flexible regional control and scalability through a separate control board that transmits data streams to each board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light source drivers and LEDs are disposed on different carrier boards, then control flexibility is improved, but the quantity of conductors increases and assembly difficulty increases
Solution Approach 1:
The patent merges the light source driver and LED onto the same carrier board, eliminating the need for external cables and reducing assembly complexity. The driver is directly integrated with the LED array, allowing control signals to be transmitted through existing board traces rather than requiring separate cable connections.
2Device complexity
If light source drivers and LEDs are disposed on the same carrier board, then the quantity of conductors is reduced, but control flexibility is reduced
Solution Approach 1:
The carrier board is divided into multiple control regions, each with its own light source driver and LED array. This segmentation allows independent control of different regions while maintaining the integration benefits of having drivers and LEDs on the same board. Each region can be controlled independently through the integrated driver, preserving control flexibility.
3Adaptability or versatility
If conventional cabling is used to connect drivers and LEDs on different boards, then control flexibility is maintained, but assembly difficulty and manufacturing costs increase
Solution Approach 1:
The patent eliminates the need for separate cabling by integrating the light source driver directly onto the carrier board with the LED array. Control signals are transmitted through printed circuit board traces instead of external cables, significantly reducing manufacturing costs and assembly steps while maintaining full control flexibility.
4Device complexity
If LEDs are controlled to emit light under the same operation condition, then system simplicity is maintained, but light-emitting uniformity becomes insufficient when luminous efficiency decays
Solution Approach 1:
The patent implements individual control of each LED through its own integrated driver on the carrier board. This allows each LED to be controlled independently with customized current levels, compensating for variations in luminous efficiency and ensuring uniform light emission across the entire array. The local control capability maintains system simplicity while achieving high uniformity.
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 light-emitting uniformity, reduces assembly complexity, and lowers manufacturing costs while maintaining the ability to control each LED individually for optimal brightness.
Implementation Method 1
Conventional direct-type backlight apparatuses use a plurality of light sources (e.g. Light Emitting Diode, LED) disposed uniformly on multiple carrier boards to provide back light
Data Source
AI summary
A backlight apparatus includes a circuit board, a control board, and a connection cable connecting the above components. A first light source driver and a second light source driver are disposed on the circuit board and are electrically connected to a plurality of first light sources and a plurality of second light sources respectively. A connector is disposed on the circuit board. The first and second light source drivers are individually electrically coupled in series to the connector. The control board outputs electrical power, a first data stream, and a second data stream. The first light source driver controls the first light sources to light individually according to the first data stream. The second light source driver controls the second light sources to light individually according to the second data stream. Thereby, the circuit board can control the operation of the light sources individually.