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EP0303138A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method and apparatus for controlling two or more video display devices

Assignee: Compaq Computer Corp
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Filing: 1988-08-01
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Granted: —
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Expires: 2008-08-01
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Abstract

Abstract A method and apparatus for controlling two or more video display devices using a single display controller, where the display devices generally require different control data. Basic display control parameters are stored in a memory and, when the controller is to be switched from one display device to another, the parameters are read from the memory into a substitution device. The substitution device receives modification control signals which depend on the newly selected display device and modifies the display control parameters before re­programming the display controller. The display controller then contains the parameters as appropriately modified for the currently controlled display device. The operator can switch from one monitor to another by generating an appropriate control signal, whereupon the substitution device again reads the control parameters from the memory, modifies them according to the newly selected display device, and re-programs the display controller using the modified parameters.

Inventors

  • 👤 Roy E. Thoma, Iii

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 18:51
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/1423; G06F3/1431; G09; G09G; G09G2360/00; G09G2360/02

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 155 words
A method for controlling two or more video display devices using a single controller, comprising the steps of: transferring display control data to a memory device and to a substitution device; generating type signals indicative of the types of display devices to be controlled; generating modification signals as determined by the type of a first display device to be controlled; modifying the display control data in the substitution device in response to the modification signals; programming the controller using the modified display control data; generating a switch signal to change control from the first display device to a second display device; reading the display control data from the memory device into the substitution device; generating modification signals as determined by the type of the second display device to be controlled; modifying the display control data in the substitution device in response to the modification signals; and re-programming the controller using the modified display control data.
Claim 2
Independent Claim 155 words
A method for controlling two or more video display devices using a single controller, comprising the steps of: transferring display control data to a memory device and to a substitution device; generating type signals indicative of the types of display devices to be controlled; generating modification signals as determined by the type of a first display device to be controlled; modifying the display control data in the substitution device in response to the modification signals; programming the controller using the modified display control data; generating a switch signal to change control from the first display device to a second display device; reading the display control data from the memory device into the substitution device; generating modification signals as determined by the type of the second display device to be controlled; modifying the display control data in the substitution device in response to the modification signals; and re-programming the controller using the modified display control data.
Claim 3
Dependent Claim 103 words
An adapter circuit for interfacing a single display controller with two or more video display devices, comprising: a memory for storing display control parameters; means for indicating types of display devices to be controlled by the controller; means for selecting a display device to be controlled and for generating a change signal; and a substitution device responsive to the change signal to receive display device data and to read display control parameters from the memory and operative to modify the display control parameters in accordance with the display device data and operative to program the display controller to control the selected display device.
Claim 4
Dependent Claim 103 words
An adapter circuit for interfacing a single display controller with two or more video display devices, comprising: a memory for storing display control parameters; means for indicating types of display devices to be controlled by the controller; means for selecting a display device to be controlled and for generating a change signal; and a substitution device responsive to the change signal to receive display device data and to read display control parameters from the memory and operative to modify the display control parameters in accordance with the display device data and operative to program the display controller to control the selected display device.

References Cited (Backward Citations)

EP0195163A2 Cited

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