Display Device Serial Interface Master-Slave Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As display devices increase in resolution and color gamut, existing interfaces struggle to efficiently and stably transmit wider bandwidth image and control signals from a signal controller to data driving chips, necessitating a more efficient method for serial data transmission.
Innovation Solution
A display device employing a new interface that serially transmits integrated signals with embedded control data, where data driving chips are designated as either master or slave, with master chips operating at a higher switching rate and receiving integrated signals directly from the signal controller, while slave chips receive signals from corresponding master chips, using pulses with fixedly positioned rising edges and variably positioned falling edges to encode information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing interfaces are used to transmit image and control signals, then the transmission can be established, but the transmission becomes unstable and inefficient when resolution and color gamut increase
Solution Approach 1:
The patent combines image data and control data into a single integrated signal transmitted through one serial interface. The control data is embedded within the image data stream using specific bit patterns (e.g., DDC/CEA-861 protocol), allowing both data types to share the same transmission channel, thereby improving efficiency while maintaining stability through unified signal management
Solution Approach 2:
The patent implements dynamic data transmission by allowing the interface to adapt between different transmission modes (e.g., 8b/10b encoding, CEA-861 protocol) based on the specific requirements of the display device. The system can dynamically adjust the data format, bit rate, and embedding protocol to optimize performance for different resolutions and color gamuts
2Measurement precision
If higher resolution and wider color gamut are implemented, then display quality is improved, but the signaling bandwidth requirement increases
Solution Approach 1:
The patent embeds control data within the image data stream using a nested structure where control commands are hidden within specific bit patterns of the image data. This allows control information to be transmitted without requiring separate dedicated channels, effectively nesting one data stream within another to reduce overall bandwidth requirements while supporting high-resolution displays
Solution Approach 2:
The patent employs variable encoding schemes (such as 8b/10b encoding, variable bit rate transmission) that can dynamically adjust the signaling parameters based on the actual data requirements. When high resolution and wide color gamut are needed, the system optimizes the encoding efficiency to minimize the bandwidth overhead, adapting parameters like bit rate and encoding format to match the display quality requirements
3Ease of operation
If separate interfaces are used for image data and control data, then transmission can be established, but the number of transmission lines increases
Solution Approach 1:
The patent merges separate image data and control data transmission into a single integrated serial interface. By embedding control commands within the image data stream using standardized protocols (DDC/CEA-861), the system eliminates the need for separate control signal lines, reducing the physical complexity of the interface while maintaining ease of operation through unified data management
Solution Approach 2:
The patent creates a universal serial interface that can handle both image data and control data transmission through a single channel. The interface is designed to be multi-functional, supporting various data types (image pixels, control commands, timing information) through a unified protocol, thereby simplifying the overall system architecture and reducing the number of required transmission lines
Data Source
AI summary
An image display device employs an interface protocol wherein integrated image plus control data is transmitted from a signal controller circuit to each of a plurality of master data driving circuits. The integrated image plus control data includes display control data as well as image-defining data. The signal controller circuit determines which of a plurality of data driving circuits is to function as a master data driving chip and which as a slave data driving chip. The signal controller circuit directly transmits respective integrated image plus control data signals to corresponding ones of the master data driving chips. Each master data driving chip then forwards part of the received integrated image plus control signal to its corresponding slave data driving chip.