Control system for an electronic sign (video display system)
First Claim
1. In a control system for a remote electronic sign, data distributor means, for receiving command, clock and data signals for controlling the display on a remote electric sign from a video link control unit, comprising;
- a. receiver means for generating data signals, responsive to display data, and clock signals having a varying characteristic according their functions, from a video link control unit, said receiver means including;
(1) buffer means for storing said data signals;
(2) clock signal decode means responsive to a first, column director latch, clock signal class for triggering an output control function signal;
b. transmitter means, connected to said buffer means and responsive to said output control function signal to pass data signals stored in said buffer means and said clock signals decode means to an output port; and
c. line controller means connected to said output port and responsive to data signals and clock signals at said output port for developing display element control signals effective to cause said data to be displayed an electronic sign.
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Accused Products
Abstract
A video display system including an electronic sign, a electronic sign control system utilizing a general purpose personal computer, having a video interface card, controlled by clock and command signals from said personal computer, containing a plurality of video and digital input ports and a high speed output port, a transmitter link control card, also under the control of clock and command signals from said personal computer, for transmitting video display, clock, and command signals to a remote data receiver and distributor associated with the electronic sign, which converts said signals into device control signals for controlling individual sign display elements.
29 Citations
18 Claims
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1. In a control system for a remote electronic sign, data distributor means, for receiving command, clock and data signals for controlling the display on a remote electric sign from a video link control unit, comprising;
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a. receiver means for generating data signals, responsive to display data, and clock signals having a varying characteristic according their functions, from a video link control unit, said receiver means including; (1) buffer means for storing said data signals; (2) clock signal decode means responsive to a first, column director latch, clock signal class for triggering an output control function signal; b. transmitter means, connected to said buffer means and responsive to said output control function signal to pass data signals stored in said buffer means and said clock signals decode means to an output port; and c. line controller means connected to said output port and responsive to data signals and clock signals at said output port for developing display element control signals effective to cause said data to be displayed an electronic sign. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control system for an electronic sign having individual display elements, comprising:
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a. analog video input means for accepting an input video signal to be displayed; b. ADC means for converting said video input signal to a first, digital video signal, form; c. means for generating a second, digital signal representing graphic data to be displayed and for combining said digital video signal and said graphic digital signal to provide a digital display signal representing the combination of said input video signal and said graphic data; and d. control means, responsive to said digital display signal for applying said digital display signal to said individual display elements. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification