Mini-LED Backlight Driving Circuit Parallel Data Transmission
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Solution Overview
Problem
The existing mini-LED backlight driving systems face challenges with low transmission rate and insufficient accuracy due to the complexity of interface wiring and the large number of light-emitting chips, requiring improved efficiency and reliability.
Innovation Solution
A communication device and light source driving circuit system that employs a control unit to transmit commands and data through serial and parallel interfaces, allowing for repackaging and redundant transmission, ensuring high data transmission speed and reliability by cascading light source driving circuits with serial and parallel interfaces, and using nonvolatile memory for address storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive driving technology is used for mini-LED backlight, then device complexity is reduced, but transmission rate and accuracy deteriorate
Solution Approach 1:
The patent divides the mini-LED backlight system into multiple independently controllable partitions, with each partition having its own driving circuit. This segmentation allows the system to manage complexity through modular design while maintaining high transmission accuracy through dedicated control channels for each partition, resolving the contradiction between device complexity and transmission reliability.
2Quantity of substance
If the number of light-emitting chips is increased to tens of thousands or hundreds of thousands, then display quality is improved, but transmission rate and accuracy deteriorate
Solution Approach 1:
The patent transitions from serial data transmission to parallel data transmission by introducing multiple data transmission channels (SDA0, SDA1, SDA2, SDA3) that can simultaneously transmit data to different driving circuits. This dimensional change from single-channel serial to multi-channel parallel transmission enables the system to handle tens of thousands or hundreds of thousands of light-emitting chips while maintaining high data transmission rates and accuracy.
3Device complexity
If serial transmission is used for data communication, then device complexity is reduced, but transmission rate deteriorates
Solution Approach 1:
The patent merges multiple serial transmission channels into a parallel transmission system by combining multiple data transmission interfaces (SDA0, SDA1, SDA2, SDA3) that operate simultaneously. This merging of multiple serial channels into a parallel architecture increases data transmission speed while keeping each individual channel relatively simple, thus resolving the contradiction between interface wiring complexity and data transmission speed.
Data Source
AI summary
A light source driving circuit and a communication device for a display system are provided. The communication device includes a control unit and at least one string light source driving circuit. The control unit includes an output interface for transmitting the control commands or data and a reading back data input interface. Each string light source driving circuit includes a plurality of light source driving circuits. The control unit transmits the control commands or data to the first light source driving circuit of each string light source driving circuit through the output interface. The first driving circuit takes out the commands or data required at the current stage after receiving the control command or data, and then repackages the commands or data of the remaining driving circuits, and transmits the repackaged data packet through the serial output interface and the parallel interfaces or the parallel interfaces.