Unified LED Driver Chip Master Slave Mode Switching
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Solution Overview
Problem
Existing LED driver chip technologies require separate manufacturing for master and slave chips due to structural differences, leading to inefficiencies in driving larger LED display panels.
Innovation Solution
A unified LED driver chip design that includes a clock reception node, reference determination multiplexer, gray clock generation part, clock modulation part, data line driving part, and output generation multiplexer, enabling the chip to function as both a master and slave by generating delay and frequency clock signals based on application selection signals, allowing for flexible operation and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate master LED driver chip and slave LED driver chip structures are used, then the LED display system can display high-quality images, but the chips have to be separately manufactured increasing device complexity and manufacturing cost
Solution Approach 1:
The patent implements a unified LED driver chip structure that can operate in both master and slave modes through a mode selection signal. The chip includes a clock generation unit that can function as either a reference clock source (master mode) or a clock receiver (slave mode), eliminating the need for physically different chip designs. This multi-functional design maintains high-quality image display while reducing device complexity and manufacturing costs.
Solution Approach 2:
The patent employs dynamic configuration where the LED driver chip can switch between master and slave operational states based on external mode selection signals. The internal clock generation unit dynamically adjusts its function - generating reference clock signals when in master mode and receiving external clock signals when in slave mode. This dynamic adaptability allows a single chip structure to replace what previously required two different chip designs.
2Reliability
If separate master and slave LED driver chips are manufactured, then specific functional requirements are met, but manufacturing efficiency decreases and productivity is reduced
Solution Approach 1:
The patent creates a universal LED driver chip design that fulfills both master and slave functional requirements through a single manufacturing process. The chip includes configurable clock generation and reception circuits that can be activated based on operational mode, eliminating the need for separate production lines for master and slave chips. This significantly improves manufacturing efficiency and productivity while maintaining all required functional performances.
3Ease of manufacture
If a unified LED driver chip structure is used for both master and slave, then manufacturing efficiency is improved, but the chip must handle multiple operational modes increasing device complexity
Solution Approach 1:
The patent manages operational mode complexity through dynamic control mechanisms. A mode selection signal externally configures the chip's internal circuits to operate either as a master (generating reference clock signals) or as a slave (receiving external clock signals). This dynamic switching approach, controlled by simple external signals, keeps the internal structure relatively simple while enabling multi-functional operation, thus balancing manufacturing efficiency with acceptable device complexity.
Data Source
AI summary
Disclosed herein is an LED driver chip capable of being used for master chip and slave chip. In case that the LED driver chip of the disclosure is used for the master, the strobe clock signal may be used as a reference clock signal. The 1-st to the n-th frequency clock signals, which are relatively simple to generate, may be provided as the 1-st to the n-th gray clock signals. In case that the LED driver chip of the disclosure is used for the slave, the external clock signal may be used as a reference clock signal. The 1-st to the n-th delay clock signals, which have a phase according to the reference clock signal, may be provided as the 1-st to the n-th gray clock signal. As a result, the LED driver chip of the disclosure can be used for both a master chip and a slave chip.