Universal digital display interface

• US 5,948,091 A
• Filed: 11/26/1996
• Issued: 09/07/1999
• Est. Priority Date: 12/01/1995
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Hewlett, Gregory, Fix, Douglas M., Sexton, William J., Kerigan, Shaun
• Primary Examiner(s): Auve, Glenn A.
• Assistant Examiner(s): Myers, Paul R.
• Application Number:
  US08/756,668
• Time in Patent Office: 1,015 Days
• Field of Search: 395/284, 395/285, 395/309, 395/651-653, 710/104, 710/105, 710/129, 710/130, 713/1-3
• US Class Current: 710/10
• 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 digital display device interface for a host system (12) and its display device (14) and peripherals. The interface has separate logical and physical levels, thereby making the interface independent of any hardware configuration or connector. The initialization logic level allows dynamic configuration of the system upon power up or initialization. The display data level (30) controls the video data sent for display in a continuous, full bandwidth data stream. The I/O data level (32) controls communications between peripheral devices (18a . . . 18x) connected to the display device (14) and the system (12).

Claims

1. A host system with a display device connected by a universal display device interface, said universal display device interface comprising:

an initialization bus operable to interface between said host system and said display device so as to set up communication of specific information between said host and any peripheral devices including said display device and to transfer a subset of said specific information with regard to said display device to said host system, wherein said subset includes information identifying a bus type and speed, and a connector type, such that said host system is operable to use this information to define and configure said interface for said display device;

a uni-directional bus operable to transfer said specific information with regard to said display device to said display device from said host system and to transfer display data; and

an optional bi-directional bus for transferring data between said host system and said display device.

2. The system as claimed in claim 1 wherein said displayable data further comprises encoded data.

3. The system as claimed in claim 1 wherein said displayable data further comprises decoded data.

4. A host system with a display device connected by a universal display device interface, said universal display device interface comprising:

an initialization bus operable to interface between said host system and said display device so as to set up communication of specific information between said host and any peripheral devices including said display device and to transfer a subset of said specific information with regard to said display device to said host system, wherein said subset includes information identifying a bus type and speed, and a connector type, such that said host system is operable to use this information to define and configure said interface for said display device;

a bi-directional bus operable to transfer said specific information with regard to said display device between said display device and said host system and to transfer display data; and

an optional uni-directional bus for transferring data between said host system and said display device.

5. The system as claimed in claim 4 wherein said displayable data further comprises encoded data.

6. The system as claimed in claim 4 wherein said displayable data further comprises decoded data.