LED Driving Chip Pin Reduction via PWM Merging
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Solution Overview
Problem
Traditional light source driving technologies require a large number of pins and chips to control multiple LED lights, making them costly and unsuitable for environments with complex electronic components.
Innovation Solution
A light source driving circuit and method that uses a single light source driving chip with multiple PWM signal input terminals and control circuits, including field-effect transistors, to generate and output driving signals based on current detection signals, allowing for efficient control of multiple LED lights with reduced hardware requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional LED driving chips are used with separate PWM signal receiving terminals and control signal output terminals for each LED light, then each LED light can be controlled independently, but the number of pins required increases significantly, increasing cost and device complexity
Solution Approach 1:
The patent merges the PWM signal receiving terminal and control signal output terminal functions into a single integrated terminal structure. The driving chip receives PWM signals through shared terminals and generates control signals internally, eliminating the need for separate dedicated terminals for each LED light and significantly reducing the pin count.
Solution Approach 2:
The driving chip is designed with multi-functional terminals that can handle both PWM signal reception and control signal generation for multiple LED lights. A single terminal can serve multiple purposes across different LED channels, enabling one terminal to control multiple lights through time-division or signal multiplexing.
2Adaptability or versatility
If more LED driving chips are used to match corresponding LED lights, then sufficient control capability is achieved, but the cost increases extremely
Solution Approach 1:
The patent combines multiple LED light control functions into a single driving chip by integrating multiple PWM signal receiving terminals and control signal output terminals within one chip. This allows one chip to drive multiple LED light bars, eliminating the need for multiple separate chips and significantly reducing overall cost.
Solution Approach 2:
The driving chip is designed with universal control capability to manage multiple LED light channels through integrated PWM signal reception and control signal generation functions, allowing a single chip to replace multiple specialized driving chips.
3Ease of manufacture
If traditional driving schemes are used, then basic LED control is achieved, but adaptability to complicated electronic component environments is poor
Solution Approach 1:
The driving chip incorporates dynamic signal routing and flexible control mechanisms that can adapt to different electronic component configurations. The PWM signal receiving terminals and control signal output terminals can be dynamically assigned to different LED channels based on the specific application requirements, enhancing adaptability to complex electronic environments.
Data Source
AI summary
The present invention provides a light source driving circuit and method. The light source driving circuit is used to provide light source driving signals to a light source. The light source driving circuit comprises a light source driving chip, a first pulse width modulation (PWM) signal input terminal, and a first control circuit. The light source driving chip is utilized for generating and outputting the light source driving signals. The first PWM signal input terminal is utilized for receiving a first PWM signal. The first control circuit is utilized for controlling the light source to emit light rays according to the first PWM signal.