Multi-Point LED Driver Structure for Lower-Power Display Panels
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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 large number of lines required for data transmission and the need for additional driver pins and transceiver circuits, leading to increased costs.
Innovation Solution
A multi-point LED driver structure is implemented with a multidrop configuration, where multiple LED driving circuits receive a common data input signal and generate output signals to drive the display panel, utilizing a data enable signal to activate circuits sequentially, eliminating the need for conventional transceiver circuits and FIFO registers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional LED display panel designs use separate transceiver circuits and FIFO registers for data transmission, then data transmission reliability is improved, but circuit layout area and power consumption increase
Solution Approach 1:
The patent merges the transmitter and receiver circuits into a single bidirectional communication interface. The LED driving circuit directly receives data input signals from the controller without requiring separate transceiver circuits or FIFO registers, integrating multiple functions into one unified interface that reduces circuit layout area while maintaining data transmission reliability through synchronized clock signals.
Solution Approach 2:
The communication interface is designed with multi-functionality, serving both as a data input path and a configuration path. The same interface and signal lines are used for different purposes (data transmission and circuit configuration), eliminating the need for dedicated separate circuits for each function, thereby reducing overall circuit layout area and power consumption.
2Productivity
If conventional designs include additional driver pins and transceiver circuits for data transmission, then data transmission capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions (data transmission, configuration, clock signaling) into a single communication interface, reducing the number of required driver pins and transceiver circuits. This integration directly reduces component count and manufacturing complexity, leading to lower production costs while maintaining full data transmission capability.
Solution Approach 2:
The unified communication interface serves multiple purposes including data input, configuration commands, and clock synchronization. This multi-functional design eliminates the need for separate dedicated circuits for each function, reducing overall component count and manufacturing cost while preserving complete data transmission functionality.
3Use of energy by moving object
If multiple LED driving circuits are connected in series with sequential activation, then power consumption is reduced, but data transmission complexity increases
Solution Approach 1:
The patent implements periodic activation of LED driving circuits through a data enable signal that sequentially activates circuits in series. The controller sends data to each driving circuit in sequence with precise timing control using clock signals, ensuring that only active circuits consume power while maintaining simple data transmission through standardized interfaces.
Solution Approach 2:
The system uses clock signals and data enable signals as feedback mechanisms to coordinate sequential activation of driving circuits. The controller monitors and controls the timing of data transmission to each circuit based on clock cycles, ensuring synchronized operation and simplifying the overall data transmission process despite sequential activation requirements.
Data Source
AI summary
A light-emitting-diode driver structure applicable to driving a display panel and operation method thereof are provided. The LED driver structure includes at least one LED driving group, and the LED driving group is composed of a plurality of LED driving circuits which are serially connected in cascade. Each LED driving circuit of the LED driving group receives a data input signal in common. Upon receiving control signals, output signals are generated to drive the display panel. The multi-point driving circuit scheme can be fully or partially applied in the driver structure as required. In addition, a plurality of enable signals can be further adopted to activate each LED driving circuit, for avoiding the FIFO register used in the prior arts. By employing the disclosed technical contents, the present invention is effective in reducing both redundant power waste and circuit layout area of a conventional LED driver.