Remote display monitor system

• US 5,604,509 A
• Filed: 04/14/1995
• Issued: 02/18/1997
• Est. Priority Date: 04/14/1995
• Status: Expired due to Fees

• Current Assignee: ICS Advent Corporation
• Original Assignee: Advent Design Incorporated
• Inventors: Moore, Ronald L., Lupfer, Thomas H., Rittmaster, Thomas P.
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US08/422,580
• Time in Patent Office: 676 Days
• Field of Search: 345/1-3, 345/185, 345/201, 359/146
• US Class Current: 345/2.1
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: G09G 5/363 Graphics controllers

Abstract

A monitor is remotely coupled to a source of display data for real-time display of the data thereon. The display is real-time in that the received data is converted to pixel values and is displayed by the remote monitor almost instantaneously except for some minor data hand-off and transmission delays. The remote monitor can be any kind of conventional text and/or graphics display device, e.g. a cathode ray tube device, but preferably is a flat panel, digital display. Preferably the system couples to a pre-existing data bus, e.g. an ISA, EISA, VLB or PCI bus, and an interface circuit communicates with the source of the display information, such as a processor on the bus. Digital pixel values are stored in a local frame buffer. A transmit controller transmits the stored pixel values over a preferably serial, optical transmission medium, to a remote circuit which stores them in a remote frame buffer. A remote processor controls the communication of pixel values from the remote frame buffer to the remote monitor. In some embodiments, the remote processor has data ports, e.g. a keyboard, pointing device and/or a serial port, and can be used to process operator inputs to perform functions such as pan and zoom on the display data. Also data input at the remote monitor can be sent back to the bus interface circuit via a second transmission medium, preferably optical and serial.

Claims

1. A system for coupling a source of display data to a remote monitor for real-time display of the data thereon, the system comprising:

(a) interface means, coupled to the source, for receiving in real-time units of display data from the source,

(b) a transmission medium having a port remote from the interface means,

(c) means for transmitting, at a selected unit transfer rate, units of display data via the transmission medium to the medium'"'"'s remote port,

(d) first memory means for time buffering a unit of display data between the interface means and the means for transmitting,

(e) means for receiving, at the selected unit transfer rate, units of display data communicated to the remote port,

(f) means for communicating received units of display data to the monitor at a rate compatible with data requirements of the monitor, and

(h) second memory means for time buffering a received unit of display data between the means for receiving and the means for communicating.

2. The system according to claim 1 wherein:

(a) the units of display data each comprise a set of digital words,

(b) the transmission medium comprises a serial medium,

(c) the means for transmitting further comprises means for serializing digital words into corresponding serial signals for transmission of same over the serial medium, and

(d) the means for receiving comprises means for deserializing serial signals into corresponding digital words.

3. The system according to claim 2 wherein:

(a) the serial medium comprises an optical medium,

(b) the means for transmitting further comprises means for converting the serial signals to corresponding optical signals and transmitting the optical signals over the optical medium, and

(c) the means for receiving further comprises means for sensing the transmitted optical signals and converting them to corresponding serial signals.

4. The system according to claim 1 wherein the units of display data are uniform and each comprises a set of pixel values corresponding to a display frame.

5. The system according to claim 1 wherein the unit transfer rate is less than the rate at which the interface means receives units of display data from the source.

6. A system for coupling a source of display data and non-display data to a remote monitor for real-time display and control of the display data thereon, the system comprising:

(a) interface means, coupled to the source, for receiving in real-time units of display data and non-display data from the source,

(b) a data transmission medium having a port remote from the interface means,

(c) means for transmitting, via the transmission medium at a selected unit transfer rate, units of display data and non-display data multiplexed in time to the medium'"'"'s remote port,

(d) first memory means for time buffering a unit of display data between the interface means and the means for transmitting,

(e) second memory means for time buffering non-display data between the interface means and the means for transmitting,

(f) means for receiving and demultiplexing units of display data and non-display data communicated to the remote port,

(g) means for communicating received and demultiplexed units of display data to the monitor at a rate compatible with data requirements of the monitor,

(h) third memory means for time buffering a unit of display data between the means for receiving and demultiplexing, and the means for communicating,

(i) remote processing means, responsive to non-display data, for processing units of display data buffered in the third memory means according to at least one predetermined algorithm, and

(j) fourth memory means for time buffering non-display data between the means for receiving and demultiplexing, and the remote processing means.

7. The system according to claim 6 wherein:

(a) the units of display data each comprise a set of digital words,

(b) the transmission medium comprises a serial medium,

(c) the means for transmitting further comprises means for serializing digital words into corresponding serial signals for transmission of same over the serial medium, and

(d) the means for receiving and demultiplexing further comprises means for deserializing serial signals from the transmission medium into corresponding digital words.

8. The system according to claim 7 wherein:

(a) the serial medium comprises an optical medium,

(b) the means for transmitting further comprises means for converting the serial signals to corresponding optical signals and transmitting the optical signals over the optical medium, and

(c) the means for receiving and demultiplexing further comprises means for sensing the transmitted optical signals and converting them to corresponding serial signals.

9. The system according to claim 6 wherein the units of display data are uniform and each comprises a set of pixel values corresponding to a display frame.

10. The system according to claim 6 wherein the unit transfer rate is less than the rate at which the interface means receives units of display data from the source.

11. The system according to claim 6 further comprising data input port means, local to the monitor, for communicating operator inputs to the remote processor.

12. The system according to claim 11 wherein the remote processing means performs a preprogrammed algorithm in response to an operator input.

13. The system according to claim 11 wherein the remote processing means performs preprogrammed pan and zoom algorithms in response to corresponding operator inputs.

20. The system according to claim 6 further comprising means for sending selected link commands, from a set of predetermined link commands, across the medium at times between display data transmissions, said link commands being operational control signals.

14. A system for coupling a processor to a remote monitor for real-time display and control of display data thereon, the system comprising:

(a) interface means, coupled to the processor, for receiving in real-time units of display data and non-display data from the processor,

(b) a data transmission medium having a port remote from the interface means,

(c) means for transmitting, via the transmission medium at a selected unit transfer rate, units of display data and non-display data multiplexed in time to the medium'"'"'s remote port,

(d) first memory means for time buffering a unit of display data between the interface means and the means for transmitting,

(e) second memory means for time buffering non-display data between the interface means and the means for transmitting,

(f) means for receiving and demultiplexing units of display data and non-display data communicated to the remote port,

(g) means for communicating received and demultiplexed units of display data to the monitor at a rate compatible with data requirements of the monitor,

(h) third memory means for time buffering a unit of display data between the means for receiving and demultiplexing, and the means for communicating,

(i) remote processing means, responsive to non-display data, for processing units of display data buffered in the third memory means according to a predetermined algorithm,

(j) fourth memory means for time buffering non-display data between the means for receiving and demultiplexing, and the remote processing means,

(k) data port means, local to the monitor, for communicating with a data input device,

(1) means for transmitting data input from the data port means to the interface means,

(m) means for receiving and storing transmitted data input for access by the processor, and

(n) means for notifying the processor that stored input data is available for access by the processor.

15. The system according to claim 14 wherein the means for transmitting input data from the data port means to the interface means comprises:

(a) a second transmission medium having a port local to the interface means,

(b) means for transmitting the input data via the second transmission medium to the port local to the interface means, and

(c) means for time buffering the input data between the data port means and the means for transmitting it.

16. The system according to claim 14 wherein the units of display data are uniform and each comprises a set of pixel values corresponding to a display frame.

17. The system according to claim 14 wherein the unit transfer rate is less than the rate at which the interface means receives units of display data from the source.

18. The system according to claim 14 wherein the data port means further comprises a communication path between an operator input device and the remote processing means, and wherein the remote processing means performs a preprogrammed algorithm in response to an operator input.

19. The system according to claim 18 wherein the remote processing means performs preprogrammed pan and zoom algorithms in response to corresponding operator inputs.