Unified LED Array Driver Reduces Component Count
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED array driving apparatuses require a large number of parts, increasing size and manufacturing costs due to the need for multiple LED array driving boards for each color, which hinders miniaturization and cost-effectiveness.
Innovation Solution
A unified dimming/size setter is used to set driving voltages for multiple red, green, and blue LED array driving circuits, with each circuit employing a DC/DC converter and phase width modulation controller to switch and control the supply voltage, reducing the overall number of parts required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple LED array driving boards are used to drive red, green and blue LED arrays, then effective control over LED brightness and color is achieved, but the number of parts increases, increasing apparatus size and manufacturing costs
Solution Approach 1:
The patent combines multiple LED array driving circuits (red, green, and blue) into a single integrated driving board. Instead of using separate driving boards for each color, the invention integrates all color channels into one unified board, reducing the total number of parts while maintaining independent control capability for each LED array through separate PWM controllers within the same board.
Solution Approach 2:
The driving board is designed with multi-functionality to control all three color channels (red, green, blue) simultaneously. Each PWM controller on the board can independently manage its respective color channel, allowing the single board to perform the functions previously requiring multiple separate boards, thereby reducing part count without sacrificing control precision.
2Reliability
If multiple LED array driving boards are used for each color, then proper control of driving voltage is achieved, but manufacturing costs increase due to increased number of parts
Solution Approach 1:
The patent merges multiple voltage control functions into a single driving board architecture. Each PWM controller on the unified board independently regulates its color channel's driving voltage, achieving the same reliability as separate boards would provide, while the reduced part count directly lowers manufacturing costs through fewer components, less assembly work, and simplified supply chain management.
3Power
If multiple LED array driving boards are used, then adequate power conversion is achieved, but the apparatus volume increases affecting miniaturization
Solution Approach 1:
The patent consolidates multiple DC/DC converters and PWM controllers into a single integrated driving board, reducing the overall apparatus volume. By combining power conversion circuits for all color channels on one board, the invention achieves adequate power conversion capability for driving all LED arrays while minimizing the space required, thus enabling product miniaturization.
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 number of parts needed for the driving apparatus, enabling a more compact and cost-effective design while maintaining effective control over LED brightness and color.
Implementation Method 1
each of the red LED array driving circuits switching on/off a supply voltage by phase width modulation to supply the driving voltage set by the dimming/size setter
Data Source
AI summary
In an apparatus for driving LED arrays, a dimming/size setter sets each of driving voltages for a plurality of red, green and blue LED arrays in response to at least one of a dimming signal and a size control signal inputted from outside. Each of red LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Each of green LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter. Also, each of blue LED array driving circuits is commonly connected to the dimming/size setter, and switches on/off a supply voltage by PWM to supply the driving voltage set by the dimming/size setter.