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EP0456923A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Display system

Assignee: International Business Machines Corp
•
Filing: 1990-05-14
•
Granted: —
•
Expires: 2010-05-14
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Abstract

Abstract A display system is described, comprising a display device (88) for generating a visual output in response to a plurality of data signals defining the data to be displayed, a display adapter circuit (92) for generating the data signals in a form specified by control data identifying the display device (88), an output port (94) for connecting the data signals from the display adapter circuit to the display device (88) and for connecting the control data from the display device (88) to the display adapter circuit (92), characterised in that the display system further comprises a non-volatile memory (9) located in the display device (88) for storing the control data in the form of a plurality of control codes, and communication logic (95) for communicating a control code between the memory and the output port (94) in response to a command signal (21) generated by the display adapter circuit (92). The communication logic comprises a serial data link (3) for communicating the control code between the display device and the output port, device logic (97) located in the display device for communicating the control code between the memory and the serial data link, and adapter logic (96) located in the display adapter circuit for communicating the control code between the serial data link and the display adapter circuit. The control data, such as the signal timing requirements of any new display device, can be stored in the form of digital control codes held within the memory of the display device, the display system programming does not require updating every time a different display device is connected to the output port. Instead, the display adapter can read the new timing requirements from the memory of the new display device for the purpose of generating video and sync signals for correctly driving the new display device. Furthermore, where the display system comprises a multiple mode display device, the display adapter circuit can use the serial link to configure the display device to operate in a desired display mode.

Inventors

  • 👤 David Sawdon

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 07:08
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/003; G09G5/006; G09G2370/00; G09G2370/04; G09G2370/042

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 149 words
A display system comprising a display device (88) for generating a visual output in response to a plurality of data signals defining the data to be displayed, a display adapter circuit (92) for generating the data signals in a form specified by control data identifying the display device (88), an output port (94) for connecting the data signals from the display adapter circuit (92) to the display device (88) and for connecting the control data from the display device (88) to the display adapter circuit (92), characterised in that the display system further comprises a non-volatile memory (9) located in the display device (88) for storing the control data in the form of a plurality of control codes, and communication logic (95) for communicating a control code between the memory and the output port (94) in response to a command signal (21) generated by the display adapter circuit (92).
Claim 2
Dependent Claim 77 words
A display system as claimed in claim 1 wherein the communication logic comprises a serial data link (3) for communicating the control code between the display device and the output port, device logic (97) located in the display device for communicating the control code between the memory and the serial data link, and adapter logic (96) located in the display adapter circuit for communicating the control code between the serial data link and the display adapter circuit.
Claim 3
Dependent Claim 184 words
A display system as claimed in claim 2 wherein the adapter logic comprises a first serialiser for translating a command signal (21) into a command bit stream (22), a first line driver connected to the output port for communicating the command bit stream (22) to the device logic along the serial link, a first receiver connected to the output port for receiving a control bit stream from the device logic along the serial link, and a first deserialiser for translating the control bit stream into a control code corresponding to the command signal (21), and wherein the device logic comprises a second receiver for receiving the command bit stream (22) from the output port along the serial link, a second deserialiser for translating the command bit stream (22) into the command signal (21), a command decoder for translating the command signal (21) into a memory address for accessing the stored control code, a second serialiser for translating the control code into the control bit stream, a second line driver connected for communicating the control bit stream to the output port along the serial link.
Claim 4
Dependent Claim 41 words
A display system as claimed in claim 3 wherein the first serialiser and the first deserialiser are combined in a single integrated circuit module, and wherein the second serialiser and the second deserialiser are combined in a single integrated circuit module.
Claim 5
Dependent Claim 47 words
A display system as claimed in claim 4 or claim 5 wherein the first line driver and the first receiver are incorporated in a single integrated circuit module, and wherein the second line driver and the second receiver are incorporated in the a single integrated circuit module.
Claim 6
Dependent Claim 42 words
A display system as claimed in claim 2 and further comprising means for configuring the display device to operate in different display modes in response to mode control signals communicated from the adapter logic to the device logic along the serial link.
Claim 7
Dependent Claim 45 words
A display device as claimed in claim 2 or claim 6 and further comprising means for adjusting operating parameters of drive circuitry of the display device in response to parameter control signals communicated from the adapter logic to the device logic along the serial link.
Claim 8
Dependent Claim 61 words
A display device as claimed in claim 7 and further comprising means for obtaining digital samples of signals at nodes of the drive circuitry and for communicating the samples from the device logic to the adapter logic along the serial link in response to a data request signal communicated from the adapter logic to the device logic along the serial link.
Claim 9
Dependent Claim 28 words
A display system as claimed in any preceding claim wherein the control codes stored in the memory include digitally encoded data signal timing parameters for the display device.
Claim 10
Dependent Claim 13 words
A computer system comprising a display system as claimed in any preceding claim.

References Cited (Backward Citations)

GB2162026A Cited

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