Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-07-22
1997-12-02
Powell, Mark R.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345 1, 395883, G09G 500
Patent
active
056942133
ABSTRACT:
An adapter for coupling a display monitor to a computer that controls the monitor generates any selected one of a number of codes that can be sensed by the computer and which identify the image resolution at which the particular monitor operates or a resolution that has been selected by the operator in the case of multi-sync monitors. A rotary hexadecimal switch, which may be operated by turning a dial, simplifies code selection and a multi-channel dip switch enables expansion of the number of available codes. The dip switch also enables selective changing of sync signal connections within the adapter to accommodate to different monitors that have different sync signal input requirements. The adapter may be a separable unit which can be interconnected between the computer and monitor or may be a permanent built in component of the monitor image data input cable. In an alternative embodiment, an array of dip switches are connected between the monitor and computer port to enable selection of sense codes by selective grounding of any of the sense lines to the computer. A pair of diodes are also connected by a pair of the dip switches in opposite bias fashion between two of the signal sense lines to direct current in either direction between the two sense lines.
REFERENCES:
patent: 5276458 (1994-01-01), Sawdon
Enhance Cable Technology
Francis Ralph C.
Luu Matthew
Powell Mark R.
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