Multi-Drop LED Driver Structure for Lower-Power Display Panel Layouts
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Solution Overview
Problem
Conventional LED display panel designs face challenges in reducing power consumption and circuit layout area due to the need for numerous data transmission lines and additional driver pins, leading to increased costs and complexity.
Innovation Solution
A multi-drop LED driver structure is introduced, featuring a first and second LED driving group with common data lines, enabling each driving circuit to receive input signals in common, and utilizing enable signals for sequential activation, thereby eliminating the need for additional transceiver circuits and optimizing data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LED display panel designs use separate data transmission lines for each LED driving circuit, then data transmission reliability is improved, but power consumption and circuit layout area increase
Solution Approach 1:
The patent merges multiple separate data transmission lines into a single shared data transmission line that serves multiple LED driving circuits. The data signal is transmitted sequentially to different circuits through time-division multiplexing, while control signals selectively activate each circuit. This consolidation reduces the number of physical lines required, thereby reducing power consumption and circuit layout area while maintaining reliable data transmission through coordinated timing and control.
Solution Approach 2:
The patent introduces dynamic control mechanisms where enable signals selectively activate specific LED driving circuits at different time periods. The system dynamically switches which circuit receives and processes the data signal, allowing a single static data transmission line to serve multiple circuits dynamically. This dynamic allocation optimizes resource utilization and reduces the permanent infrastructure required.
2Reliability
If conventional LED display panel designs use separate data transmission lines for each LED driving circuit, then data transmission reliability is improved, but circuit layout area increases
Solution Approach 1:
The patent merges multiple separate data transmission lines into a single shared data transmission line that serves multiple LED driving circuits. The data signal is transmitted sequentially to different circuits through time-division multiplexing, while control signals selectively activate each circuit. This consolidation reduces the number of physical lines required, thereby reducing power consumption and circuit layout area while maintaining reliable data transmission through coordinated timing and control.
Solution Approach 2:
The shared data transmission line performs multiple functions by serving different LED driving circuits at different time periods. A single line replaces what would traditionally require multiple dedicated lines, making the transmission infrastructure universal rather than specialized for each circuit. This multi-functionality reduces the overall circuit layout area while maintaining the capability to reliably transmit data to all necessary circuits.
3Adaptability or versatility
If additional driver pins are used for data transmission between drivers, then data configuration capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the existing data transmission line universal by enabling it to serve multiple LED driving circuits through time-division multiplexing and selective enabling. Instead of adding specialized driver pins for configuration, the system reuses the existing data line infrastructure with intelligent control. This approach maintains data configuration capability while avoiding the increased complexity and cost associated with additional dedicated pins and transceiver circuits.
Solution Approach 2:
The system enables LED driving circuits to be selectively activated and configured through control signals that work with the shared data line. The circuits self-activate based on control signal timing, eliminating the need for additional external driver pins to manage configuration. This self-service mechanism reduces device complexity while maintaining adaptability.
Data Source
AI summary
A light-emitting-diode driver structure is provided, including a first and second LED driving group each having multiple LED driving circuits connected in series, a first and second common data line configured to receive a first and second data input signal, respectively. The first common data line is connected to respective data input terminals of each driving circuit in the first LED driving group. The second common data line receives a second data input signal which is a data output signal of a last stage of the first LED driving group, and connected to respective data input terminals of each LED driving circuit in the second LED driving group. The first and second data input signal comprise RGB display data for generating output signals on red, green and blue output data transmission lines. And therefore, the Application is effective in reducing redundant power waste and circuit layout area.