Computer controlled slide projector interface arrangement

Details Computer controlled slide projector interface arrangement Computer controlled slide projector interface arrangement

1984-01-13

1986-02-04

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

353 94, G03B 2312

Patent

active

045681619

ABSTRACT:
An intelligent interface arrangement is provided for controlling and sensing operation of one or more random access slide projectors from a host computer or intelligent terminal. The interface arrangement includes a first microprocessor controlled communication section and a second microprocessor controlled receiver section. One of the receiver sections is provided for each slide projector to be controlled. The communication section bidirectionally communicates with the host over a first communication interface and bidirectionally communicates with the receiver section over a second communication bus structure. The receiver section communicates with the controlled slide projector over a control bus including predetermined signal points in the slide projector and keyboard control lines. The communication protocol of the interface arrangement allows the host to issue commands for one or more of the respective slide projectors, test the status of the slide projectors, receive error messages, and change the communication protocol and data rate. The host via the interface arrangement is capable of controlling the slide projector to project desired slide numbers, to pause, and to perform various other predetermined mode commands to which the microprocessor controlled random access slide projector is programmed to respond via keyboard or program tape inputs.

REFERENCES:
patent: 3688262 (1972-08-01), Liquori
patent: 3907419 (1975-09-01), Moran
patent: 4076399 (1978-02-01), Schlei
patent: 4080637 (1978-03-01), Chase et al.
patent: 4086005 (1978-04-01), Honebrink et al.

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