Onboard Display System Using LAN and GMSL Cables

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional onboard entertainment systems face challenges with heavy communication loads and diminished operability due to the transmission and reception of uncompressed video signals over Ethernet connections.

Innovation Solution

The proposed information display system uses a combination of a LAN cable and a GMSL (gigabit multimedia serial link) to connect display devices and a video processing device, allowing for separate protocols and reduced processing loads by segregating signal processing and transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If Ethernet connection is used to transmit video signals, then communication between display device and video processing device is established, but communication load increases and operability diminishes

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidoperability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent divides the single Ethernet communication channel into two separate physical lines: one dedicated to control/data communication and another dedicated to video signal transmission. This segmentation isolates the heavy video data traffic from control operations, preventing communication load from affecting operability while maintaining reliable communication for both functions.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If uncompressed video signals are transmitted over Ethernet, then video quality is maintained, but communication load increases

Engineering Contradiction:

Improvevideo signal qualityVSAvoiddata transmission volume

Core Design Contradiction:

Manufacturing precisionVSQuantity of substance

Solution Approach 1:

The patent extracts the video signal transmission function from the general Ethernet communication protocol and implements it through a dedicated physical line with specialized protocol. This extraction allows uncompressed video signals to be transmitted without burdening the control communication channel, separating high-volume data transfer from low-volume control operations.

Inventive Principle:

Principle #2Taking out (Extraction)

3Adaptability or versatility

If video decoding is performed, then video display is enabled, but processing load increases

Engineering Contradiction:

Improvevideo display capabilityVSAvoidprocessing load

Core Design Contradiction:

Adaptability or versatilityVSPower

Solution Approach 1:

The patent introduces a dedicated video processing device as an intermediary between the display device and the video source. This intermediary handles the computationally intensive video decoding and processing tasks, freeing the display device from heavy processing loads while maintaining full video display capability through the specialized processing unit.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12327059B1Information display system

Publication Date: 2025.06.10 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

An information display system 10 comprises a display device 21, a seat box 30, a LAN cable 41, and a GMSL 42. The display device 21 has a display 21a that displays various kinds of information, and a USB connection part 21b that inputs and outputs data. The seat box 30 has a housing different from that of the display device 21, and processes video signals related to video displayed on the display 21a. The LAN cable 41 connects the display device 21 and the seat box 30, and uses IP protocol to perform communication between the display device 21 and the seat box 30. The GMSL 42 connects the display device 21 and the seat box 30, and transmits a signal from the seat box 30 to the display device 21 using a GMSL 42 that is different from that of the LAN cable 41.