Backlight Driver Channel Layout to Eliminate Redundant LED Outputs
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Solution Overview
Problem
Existing backlight driving systems have redundant channels in multi-channel chips due to uniform channel numbers, leading to increased cost and complexity.
Innovation Solution
A backlight driving system with a master device and slave devices having varying numbers of channels, allowing for flexible communication protocols that reduce channel redundancy and simplify PCB layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multi-channel backlight driving chips with the same number of channels are used, then the system can be simplified and standardized, but channel redundancy increases leading to higher cost
Solution Approach 1:
The backlight driving system is segmented into multiple independent driving chips, each responsible for a specific number of LED partitions. This allows the system to match the total number of LED partitions (10) exactly by using two 5-channel chips, eliminating channel redundancy while maintaining system simplicity through modular design.
Solution Approach 2:
The invention changes the channel parameter of the driving chips from uniform configurations (all 4-channel or all 6-channel) to non-uniform configurations (5-channel chips). This parameter change allows exact matching of LED partition requirements, eliminating redundant channels while maintaining standardized chip design.
2Ease of manufacture
If multi-channel backlight driving chips with the same number of channels are used, then manufacturing and design can be standardized, but system cost increases due to redundant channels
Solution Approach 1:
The system uses two independent 5-channel driving chips that exactly match the 10 LED partitions. This segmentation approach maintains manufacturing standardization through identical chip designs while eliminating the channel redundancy that occurs when using 4-channel or 6-channel chips, thereby reducing system cost.
Solution Approach 2:
The invention adopts 5-channel driving chips as the optimal parameter configuration, changing from conventional 4-channel or 6-channel designs. This parameter change enables exact matching of LED partition requirements, eliminating redundant channels and reducing cost while preserving design standardization through uniform chip selection.
3Device complexity
If uniform multi-channel chips are used in the backlight system, then the system design can be simplified, but some channels remain unused leading to resource waste
Solution Approach 1:
The backlight system is divided into 10 LED partitions, each driven by a dedicated channel of the driving chips. By using two 5-channel chips, the system achieves one-to-one mapping between channels and LED partitions, ensuring 100% channel utilization efficiency while maintaining simplified design through modular architecture.
Solution Approach 2:
The invention changes the channel parameter from conventional 4-channel or 6-channel configurations to 5-channel configuration. This parameter change enables exact matching with the 10 LED partitions, achieving complete channel utilization and eliminating resource waste while preserving design simplicity.
Data Source
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AI summary
Provided are a backlight driving system and method, and a driving module. The backlight driving system includes a master device and n slave devices. The n slave devices are coupled to a same output port of the master device, and/or, the n slave devices are coupled in series, and a same output port of the master device is coupled to a first one of the n slave devices to form a communication link. The n slave devices include a slave device having m driving ports for driving at least one LED module, and a slave device having k driving ports for driving at least one LED module, m is not equal to k. The backlight driving system includes at least two slave devices that are different in number of channels. By using slave devices having different number of channels, channel redundant is avoided.