LED Driver Chip Multiplexing Pin Layout for Lower Pin Count

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Solution Overview

Problem

Conventional LED driver chips have a large number of pins, leading to increased package size and manufacturing costs due to the integration of multiple functionalities.

Innovation Solution

The LED driving chip employs a multiplexing pin to output a multiplexed signal that combines power, data, and clock information, reducing the number of pins and package size by integrating these signals into a single pin configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple functionalities are integrated into LED driver chips with more channels, then the functionality and control capability are improved, but the number of pins increases leading to larger package size and higher manufacturing costs

Engineering Contradiction:

Improvefunctionality integrationVSAvoidnumber of pins

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a single pin that can serve multiple functions: transmitting power information, data signals, and clock signals at different time periods. This multi-functional pin design allows the LED driver chip to maintain enhanced functionality while reducing the total pin count, thereby decreasing package size and manufacturing costs

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple functionalities are integrated into LED driver chips with more channels, then the functionality and control capability are improved, but the package size increases leading to higher manufacturing costs

Engineering Contradiction:

Improvefunctionality integrationVSAvoidpackage size

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent applies merging by combining multiple signal transmission functions into a single pin. By multiplexing power information, data signals, and clock signals through one pin at different time periods, the design reduces the number of required pins and associated connection structures, thereby reducing the overall package size while maintaining full functionality

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple functionalities are integrated into LED driver chips with more channels, then the control capability is improved, but the manufacturing costs increase

Engineering Contradiction:

Improvecontrol capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent reduces manufacturing costs by designing a universal pin that can transmit multiple types of signals (power information, data, clock) at different time periods. This reduces the number of pins required, which in turn reduces package size and associated manufacturing complexity and costs, while maintaining full control capability over the LED system

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12499816B2LED driving chip and light-emitting substrate

Publication Date: 2025.12.16 HUIZHOU CHINA STAR OPTOELECTRONICS DISPLAY CO LTD

AI summary

A light-emitting diode (LED) driving chip and a light-emitting substrate are provided. The LED driving chip includes a multiplexing pin for outputting a multiplexed signal. The multiplexed signal includes at least two of power information, data information, and clock information. The power information is configured to provide an operating voltage to the LED driving chip. The data information is configured to provide data signals to the LED driving chip. The clock information is configured to provide clock signals to the LED driving chip. This reduces the number of pins on the LED driving chip.