Daisy-Chain Display Device Automatic Region Configuration
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Solution Overview
Problem
In multi-display systems, users face difficulties in specifying display regions for projectors, especially when they are installed at high positions, leading to complex and labor-intensive operations, and potential errors in setting up split video images when projectors are replaced.
Innovation Solution
A display device and method that uses an encryption protocol to daisy-chain display devices, where each device stores and transmits encryption keys to form a split video image based on the number of splits and stored encryption keys, allowing for easy configuration and operation of multi-display systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users directly specify display regions for projectors, then display region settings can be customized, but operation becomes complicated and labor-intensive when projectors are installed at high positions
Solution Approach 1:
The projector automatically performs device identification and display region determination without requiring user input. The system uses the projector's own identification information to automatically determine its position in the daisy-chain connection and calculate the appropriate display region, enabling the device to serve itself in the configuration process.
Solution Approach 2:
The system introduces an automatic determination mechanism that acts as an intermediary between the daisy-chain connection and display region setting. This mechanism uses identification information transmission and processing to bridge the gap between device connection and automatic configuration, eliminating the need for direct user specification.
2Adaptability or versatility
If users manually set display regions through remote controller, then display configuration can be adjusted, but operation becomes difficult to understand and requires labor
Solution Approach 1:
The projector automatically determines its display region based on its identification information and position in the daisy-chain connection. This self-service approach maintains configuration flexibility while eliminating the need for users to understand complex remote controller operations or manually specify display regions.
Solution Approach 2:
The system performs display region determination automatically during the device connection phase, before user interaction is needed. By pre-calculating the appropriate display region based on identification information, the system prepares the configuration in advance, making the process simple for users.
3Reliability
If display region is mistakenly set by user, then unexpected video image may occur, but prevention requires complex verification procedures
Solution Approach 1:
The projector automatically and accurately determines its own display region using its identification information, eliminating human error in manual setting. This self-service verification process ensures reliability without adding complex verification procedures, as the system inherently knows its correct configuration through its identification data.
4Duration of action of stationary object
If projector is replaced due to failure, then system continuity is maintained, but user needs to set display region again causing operability problems
Solution Approach 1:
The replacement projector automatically performs device identification and display region determination as soon as it is connected to the daisy-chain system. This preliminary automatic configuration action ensures system continuity by immediately restoring proper display region settings without requiring user intervention, making the replacement process seamless.
Solution Approach 2:
The replacement projector uses its own identification information to automatically determine its position in the daisy-chain connection and set its display region independently. This self-service capability eliminates the need for users to reconfigure the system after projector replacement, maintaining ease of operation throughout the system's operational life.
Data Source
AI summary
In a display device that is daisy-chained to a source device that outputs a video signal, and transmits an encryption key (KSV) used for encryption to source device, the display device includes storage to store the encryption key of an own display device (first device KSV), and the encryption keys (second device KSV, third device KSV) of all of downstream side display devices that are provided on a downstream side of the own display device among all of the other display devices that are daisy-chained, the encryption keys being transmitted to source device through its own display device when the display devices are daisy-chained to source device, and causes a display to form a split video image that is a part of a video image based on the number of splits of the video image corresponding to the video signal and the number of encryption keys stored.