Data processing system having a wireless communication link for data communication with a peripheral device

• US 5,877,745 A
• Filed: 05/02/1995
• Issued: 03/02/1999
• Est. Priority Date: 07/15/1994
• Status: Expired due to Term

• Current Assignee: MediaTek, Inc.
• Original Assignee: International Business Machines Corporation
• Inventors: Kerigan, Shaun, Beeteson, John
• Primary Examiner(s): Brier, Jeffery
• Assistant Examiner(s): Bell, Paul A.
• Application Number:
  US08/432,736
• Time in Patent Office: 1,400 Days
• Field of Search: 345/156, 345/163, 345/168, 345/169, 345/157, 345/1, 345/2, 345/3, 345/10, 345/11, 340/825.31, 340/825.32, 340/825.36, 364/707, 395/893, 395/894, 395/882
• US Class Current: 345/156
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• 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

Abstract

A data processing system is disclosed, which includes a system unit, a display device for displaying data generated by the system unit, data communication means for communicating display data between the display device and the system unit, a peripheral device, and peripheral communication means for communicating data between the peripheral device and the system unit. In accordance with the present invention, data is communicated between the system unit and the peripheral device via the display device. Data is transferred between the display device and the peripheral device utilizing a wireless communication link, thereby eliminating the problems associated with electrical cables. In a preferred embodiment of the present invention, the wireless communication link includes a first transceiver means located in the display device and a second transceiver means located in a peripheral device. In a first embodiment, the first and second transceiver means comprise infrared transceivers. Utilizing infrared transceivers advantageously reduces undesirable radio frequency emissions. Alternatively, the first and second transceiver means may comprise a radio frequency transceiver.

Claims

1. A data processing system comprising:

a bus;

a processor coupled to said bus;

a first peripheral device, wherein said first peripheral device is a display device including a display driver that displays images in response to display signals and a display processor that controls the display of images by said display driver in response to instruction codes;

a plurality of peripheral devices other than said display device, each of said plurality of peripheral devices being identifiable by both a physical address and a logical address;

an adaptor connected to said bus and coupled to said display device, said adaptor communicating both display data and other peripheral data with said bus, said other peripheral data being associated with said plurality of peripheral devices other than said display device, wherein said adaptor converts display data received from said bus into display signals and transmits said display signals to said display device;

a communication channel connecting said adaptor and said display device, wherein said communication channel conveys, from said adaptor to said display device, said instruction codes and conveys said other peripheral data between said adaptor and said display device;

a plurality of wireless communication links, wherein each of said plurality of wireless communication links is capable of communicating the other peripheral data between a respective one of said plurality of peripheral devices other than said display device and said display device; and

a peripheral controller, located within said display device, that assigns a different logical address to each respective peripheral device among said plurality of peripheral devices from which said peripheral controller receives a physical address in response to receipt by the peripheral device of an interrogation code from said peripheral controller, wherein said peripheral controller supplies each assigned logical address to both said adaptor and the peripheral device to which the logical address is assigned, and wherein said peripheral controller selectively couples a wireless communication link among said plurality of wireless communication links to said communication channel in response to a logical address specified in said other peripheral data.

2. The data processing system of claim 1, wherein each of said plurality of wireless communication links includes a first transceiver means located within said display device and a second transceiver means located in a corresponding one of said plurality of peripheral devices other than said display device.

3. The data processing system of claim 2, wherein each of said plurality of wireless communication links includes a buffer located within said display device for coupling said first transceiver means to said communication channel.

4. The data processing system of claim 2, wherein said first transceiver means includes an infrared transceiver and said second transceiver means, in at least one of said plurality of peripheral devices other than said display device, includes an infrared transceiver.

6. The data processing system of claim 2, wherein a second transceiver means in at least one of said plurality of wireless communication links includes a control unit having a battery power source, said control unit being configured to enable transmission of peripheral data by said second peripheral device in response to detecting an enabling signal from said display device and to disable transmission of peripheral data by said second peripheral device in response to detecting a disabling signal from said display device, said display device being configured to send enabling and disabling signals in response to receipt of instructions via said communication channel.

7. The data processing system of claim 1, wherein said plurality of peripheral devices other than said display device includes a pointing device and a keyboard.

8. The data processing system of claim 1, wherein a second peripheral device among said plurality of peripheral devices includes a lock circuit responsive to a password transmitted by said display device for enabling transmission of peripheral data from said second peripheral device to said display device.

9. The data processing system of claim 1, wherein said display device transmits said other peripheral data from said display device to a second peripheral device among said plurality of peripheral devices in a security-encrypted format.

10. The data processing system of claim 1, wherein said peripheral controller transmits a warning to said bus via said communication channel and said adaptor in response to detection of peripheral data transmitted from a previously undetected peripheral device.

11. The data processing system of claim 1, wherein said display device is a stand-alone monitor connected to said adaptor by an interface cable, and wherein said communication channel includes a serial data channel within said interface cable.

12. The data processing system of claim 1, and further comprising a plurality of system units each connected to a respective one of a plurality of display devices, wherein more than one of said plurality of display devices communicates with a second peripheral device among said plurality of peripheral devices.

13. The data processing system of claim 1, wherein each of said plurality of peripheral devices responds to receipt of an interrogation code from said peripheral controller by supplying a physical address only if the peripheral device does not have an assigned logical address.

5. The data processing system of cl aim 2, wherein said first transceiver means includes a radio frequency transceiver and said second transceiver means, in at least one of said plurality of peripheral devices other than said display device, includes a radio frequency transceiver.

14. A display device comprising:

a display communication means for communicating display signals between a data processing system and said display device;

a display screen;

a drive circuit for displaying an image within said display screen in response to said display signals;

a display processor that controls the display of images by said drive circuit in response to instruction codes;

a plurality of wireless communication links, wherein each of said plurality of wireless communication links is capable of communicating peripheral data between a respective one of a plurality of peripheral devices other than said display device and said display device;

a communication channel for communicating, between said display device and the data processing system, both said peripheral data and said instruction codes that control the display of said image; and

a peripheral controller that assigns a different logical address to each respective peripheral device among said plurality of peripheral devices from which said peripheral controller receives a physical address in response to receipt by the peripheral device of an interrogation code from said peripheral controller, wherein said peripheral controller supplies each assigned logical address to both said data processing system and the peripheral device to which the logical address is assigned, and wherein said peripheral controller selectively couples a wireless communication link among said plurality of wireless communication links to said communication channel in response to a logical address specified in said other peripheral data.

15. The display device of claim 14, wherein said plurality of wireless communication links include an infrared transceiver.

16. The display device of claim 14, wherein said plurality of wireless communication links include a radio frequency transceiver.

17. The display device of claim 14, said communication channel comprising a serial data channel.

18. A method of transferring data in a data processing system including a system unit, a first peripheral device comprising a display device, and a plurality of other peripheral devices including a second peripheral device, wherein said system unit includes an adaptor coupled to a bus in said system unit, and wherein said display device has a plurality of wireless communication links that are each capable of communicating peripheral data between said display device and a respective one of said plurality of peripheral devices, said method comprising:

registering said plurality of peripheral devices with said data processing system, wherein registering includes;

broadcasting an interrogation code from said display device through said plurality of wireless communication links;

in response to receipt of said interrogation code by said plurality of peripheral devices, transmitting, via said plurality of wireless communication links, a unique physical address from each of said plurality of peripheral devices to said display device;

in response to receipt of physical addresses from said plurality of peripheral devices, assigning each of said Plurality of peripheral devices a unique logical address and transmitting, via said wireless communication links, each assigned logical address to the peripheral device to which the logical address is assigned; and

transmitting each assigned logical address to said system unit;

communicating display signals between said adaptor and said display device;

in response to receipt of said display signals at said display device, displaying an image within said display device;

communicating peripheral data between said second peripheral device and said display device via a wireless communication link;

communicating, via a communication channel coupling said adaptor and said display device, both said peripheral data communicated between said display device and said second peripheral device and instruction codes that control the display of said image within said display device; and

communicating said peripheral data between said adaptor and said bus.

19. The method of transferring data of claim 18, and further comprising the step of:

prior to communicating said peripheral data between said second peripheral device and said display device, converting said peripheral data into a security-encrypted format.

20. The method of transferring data of claim 18, and further comprising the step of:

enabling transmission of peripheral data from said second peripheral device to said display device by transmitting a password from said display device to said second peripheral device via said wireless communication link.

21. The method of claim 18, wherein transmitting a unique physical address from each of said plurality of peripheral devices to said display device comprises transmitting a unique physical address from a particular peripheral device to said display device only if said particular peripheral device has not be assigned a logical address.