Computerized illumination system

• US 4,317,071 A
• Filed: 11/02/1978
• Issued: 02/23/1982
• Est. Priority Date: 11/02/1978
• Status: Expired due to Term

• Current Assignee: Peter S.E. Murad
• Original Assignee: Peter S.E. Murad
• Inventors: Murad, Peter S. E.
• Primary Examiner(s): LAROCHE, EUGENE
• Application Number:
  US05/957,216
• Time in Patent Office: 1,209 Days
• Field of Search: 315/194, 315/199, 315/291, 315/312, 315/313, 315/323, 315/293
• US Class Current: 315/312
• CPC Class Codes: H02M 5/2576 with digital control
• CPC Class Codes: H05B 39/083 by the variation-rate of light intensity
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

The invention consists mainly of two major sub-systems, ie, three colored lamps and a solid state digital computer. The three lamp colors are green, blue and red. The Computer consists of several TTL devices, diodes, capacitors and resistors. The computer electronics generate the trigger pulses for controlling the firing of triacs which are power devices controlling the amount of power delivered to the lamps. Each lamp is driven by one triac. However, each triac has the power capability to drive several lamps. These lamps generally are immersed in water but could also be used out of water.

Claims

1. An illumination control system for a plurality of lamps and optical elements arranged to emit at least three different colors of lights, comprising:

a high frequency clock;

a first binary counter connected to the output of the high frequency clock;

a low frequency clock; and

, a plurality of electronic control circuits, each individual control circuit controlling the emission of one color of light, each control circuit comprising a second binary counter connected to the output of the low frequency clock, a digital comparator for comparing the counts in the first and second binary counters, and means for controlling the intensity of the emission of said one color of light in response to the output of said comparator.

2. An illumination control system as recited in claim 1 wherein the colors of light are red, green, and blue, said lamps and optical elements are immersed in a scattering medium, and said electronic control circuits include means for independently varying the power to the lamps, whereby multiple colors in a selectively fixed and cycling pattern are generated.

3. An illumination control system as recited in claim 1 wherein said second binary counters are up-down counters, each counter being programmable to establish a preset initial intensity level in its associated lamp and to establish direction of count, said counters stepping one binary number in the established direction for each clock pulse received, said counters automatically reversing in count upon obtaining either established minimum or maximum counts.

4. An illumination control system as recited in claim 3 wherein one of said up-down counters is a master counter, and said illumination control system further includes means responsive to the re-setting of said master counter for resetting all other counters.

5. An illumination control system as recited in claim 1 wherein the second binary counter is an up-down counter triggered by the low frequency clock, the period of said low frequency clock is manually controllable, whereby the counter triggers and hence lamp intensity cycle is controllable, and, said electronic control circuit includes means for inhibiting the clock from triggering the up-down counter, whereby a constant lamp intensity is produced corresponding to the time at which the clock is inhibited.

6. An illumination control system as recited in claim 1 wherein said digital comparator generates a lamp trigger pulse when the count in the first binary counter is identical to the count in the up-down counter.

7. An illumination control system as recited in claim 1 wherein a control system is provided such that when its position is selected, each up-down counter will stop upon obtaining maximum count at which point the low frequency clock is inhibited and said lamp intensity is zero.

8. An illumination control system as recited in claim 7 wherein said high frequency clock includes a voltage control oscillator, said illumination control system further including means effective upon selection to said control position for enabling the introduction of audio signals to said voltage control oscillator to frequency modulate said high frequency clock, said modulation causing equal linear intensity variations of the three colors.