Wireless Display Synchronization via Frame ID Comparison

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Solution Overview

Problem

Existing display systems fail to synchronize video playback across multiple display devices, leading to deviations in video timing and causing user discomfort, such as visually induced motion sickness.

Innovation Solution

A display system that includes a transmitting device for wirelessly transmitting video data to multiple display devices, which detect deviations in video timing through inter-device communication and adjust display by comparing frame identification information to synchronize playback.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If video data is transmitted to multiple display devices using wireless communication, then the quantity of display devices can be increased, but timing deviation between videos displayed by different devices occurs

Engineering Contradiction:

Improvenumber of display devicesVSAvoidvideo synchronization

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The transmitting device transmits frame identification information along with video data in advance. Each display device uses this identification information to synchronize its display timing, preventing timing deviation before it occurs. This preliminary provision of synchronization data enables multiple devices to maintain consistent video playback.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Display devices monitor their own display timing and compare it with the transmitted frame identification information. When timing deviation is detected, the system can adjust the display timing of individual devices to maintain synchronization. This feedback mechanism ensures video consistency across multiple display devices.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If video data is transmitted to multiple display devices, then display versatility is improved, but deviation in display timing occurs causing user discomfort

Engineering Contradiction:

Improvedisplay configuration flexibilityVSAvoidvisually induced motion sickness

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Frame identification information is transmitted in advance with the video data, enabling display devices to pre-calculate and adjust their display timing. This preliminary synchronization prevents timing deviation that would cause visual discomfort, allowing versatile multi-device display configurations without inducing motion sickness.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors display timing across multiple devices and provides feedback for adjustment. When timing deviation is detected that could cause visual discomfort, the system adjusts individual device timings to maintain synchronization, eliminating the harmful effect of timing mismatch while preserving display versatility.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10171866B2Display system, display device, head-mounted display device, display control method, control method for display device, and computer program

Publication Date: 2019.01.01 SEIKO EPSON CORP

AI summary

A display system includes a control device, a first display device, and a second display device. The control device includes a wireless communication section that wirelessly transmits video data. The first display device includes a wireless communication section that receives the video data and an OLED unit that displays a video on the basis of the video data. The second display device includes a wireless communication section that receives the video data and an OLED unit that displays a video on the basis of the video data. The display system detects deviation between the videos displayed by the OLED units.