LED Driving Chip Pin Multiplexing for Display Signal Transmission
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Solution Overview
Problem
Conventional LED light-emitting module technology faces high costs due to the need for multiple pins in driving chips to transmit various signals.
Innovation Solution
A light-emitting module with a substrate and a driving layer featuring cascaded driving chips, where first and second sub-light source pins are used for time-division multiplexing and transmission of address and display signals, reducing the need for separate pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate pins are used in driving chips to transmit address signals and display signals separately, then signal transmission reliability is improved, but driving chip cost and pin quantity increase
Solution Approach 1:
The patent combines address signal transmission and display signal transmission into a single pin by implementing time-division multiplexing. The same pin alternates between transmitting address signals during a first time period and display signals during a second time period, thereby reducing the total number of pins required in the driving chip while maintaining reliable signal transmission.
Solution Approach 2:
The patent makes a single pin serve multiple functions by enabling it to transmit both address signals and display signals at different time periods. This multi-functional pin replaces what would traditionally require two separate dedicated pins, reducing device complexity without compromising the reliability of signal transmission.
Data Source
AI summary
A light-emitting module, a control method of the light-emitting module, and a display module are provided to include a light source layer and a driving layer. The light source layer includes light source groups. Each of the light source groups includes a first sub-light source and a second sub-light source. In the driving layer, the driving chip in each stage includes a first sub-light source pin electrically connected to one of the first sub-light sources and a second sub-light source pin electrically connected to one of the second sub-light sources. The first sub-light source pins and the second sub-light source pins are used for time-division transmission of address signals and display signals.