Browse Prior Art Database

XMD Video Cable Hub for eXtended Mode Display (XMD) Architecture Systems

IP.com Disclosure Number: IPCOM000015605D
Original Publication Date: 2002-Jan-09
Included in the Prior Art Database: 2003-Jun-20
Document File: 6 page(s) / 68K

Publishing Venue

IBM

Abstract

1. Describe your invention, stating the problem solved (if appropriate), and indicating the advantages of using the invention. XMD technology (see prior art reference below) allows a portable to be turned into a display system which can be used during presentations instead of a projection system. The problem is that there is currently no easy way to connect multiple XMD systems. The XMD Video Cable Hub solves this problem. When used in a conference room setting, a distribution hub is required, to allow one presenter to present to more than one attendee. The XMD cable hub allows multiple XMD display systems to daisy-chain to each other. The hub also allows the presenter to change during the course of the session, changing the display direction dynamically. 2. How does the invention solve the problem or achieve an advantage,(a description of "the invention", including figures inline as appropriate)? Summary:

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XMD Video Cable Hub for eXtended Mode Display (XMD) Architecture Systems

   1. Describe your invention, stating the problem solved (if appropriate), and indicating the advantages of using the invention.

XMD technology (see prior art reference below) allows a portable to be turned into a display system which can be used during presentations - instead of a projection system. The problem is that there is currently no easy way to connect multiple XMD systems. The XMD Video Cable Hub solves this problem. When used in a conference room setting, a distribution hub is required, to allow one presenter to present to more than one attendee. The XMD cable hub allows multiple XMD display systems to daisy-chain to each other. The hub also allows the presenter to change during the course of the session, changing the display direction dynamically.

2. How does the invention solve the problem or achieve an advantage,(a description of "the invention", including figures inline as appropriate)?

Summary:

The invention is meant for use with an eXtended Mode Display system. The cable hub consists of 3 XMD-VCH (Video Cable Hub) connectors and a cable. The XMD-VCH connectors are used to connect two systems together, the daisy-chain connector is used for a third system to connect into the hub and provide a means for more systems to tie into the presentation. At any time there is only one presenter - every other system passively displays the output from the presenting system. A switch at each connector allows any user to request and automatically assume presenter status.

Details: The invention consists of the following:

1. A cable with three connectors (as shown in Fig 1)

1

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External PC Driving Portable Display in Dual Mode

                        Internal Flat TRternal CExPanel Connector

Dual Mode Display Connector

Sensor

CONTROLMUX

Converter Logic

DAC

Analog to Digital Converter

Display Controller

Dual Mode Display Software Driver

Portable Computer Internal Hardware and Software

Figure 1. Proposed eXtended Mode Display Hub Cable

The Figure above shows how the cables daisy chain together. The request signals and transceivers for the video signal are shown in Fig 2, below.

2

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Female

Display

Present(1)Female Signals

RST out

Display (0)

Display (0)

FemaleFemale

RSTin

RST out

Present

RSTin

2. Switching logic which allows a direction change from "receive" to "transmit" within the connector hub. This logic also has built in contention prevention logic that forces an existing presenter into "receive" mode when a "receive" mode participant switches to "transmit" mode - to ensure that only one person is transmitting at any time.

Receive mode is also referred to as "display" mode. Transmit mode is also referred to as "present" mode. This is shown in Fig 3.

3

RSTin

RSTRSTin out

Display

Display

Figure 2. Daisy chained Display signal and Display/Present selector Line

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