Microprocessor controlled lamp flashing system with cooldown protection

• US 5,078,039 A
• Filed: 08/08/1990
• Issued: 01/07/1992
• Est. Priority Date: 09/06/1988
• Status: Expired due to Term

• Current Assignee: Electronic Theatre Controls Incorporated
• Original Assignee: Lightwave Research
• Inventors: Tulk, Steven E., Belliveau, Richard S.
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): VOELTZ, EMANUEL T
• Application Number:
  US07/564,180
• Time in Patent Office: 517 Days
• Field of Search: 84/464 R, 362/85, 362/218, 362/227, 362/233, 362/276, 362/294, 362/345, 362/373
• US Class Current: 84/464.00R
• CPC Class Codes: A63J 17/00 Apparatus for performing colour-music
• CPC Class Codes: H05B 41/30 in which the lamp is fed by pulses, e.g. flash lamp
• CPC Class Codes: H05B 41/36 Controlling
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources

Abstract

The microprocessor controlled lamp flashing system includes a plurality of flash lamp assemblies for providing lighting effects in response to input control signals from a central processor. The control signals are provided in a data packet with intensity and address signals, and each flash lamp assembly includes a microprocessor which controls a flash control circuit for a flash lamp. Each microprocessor is connected to a preset address circuit which causes the microprocessor to respond to a unique address signal in the data packet and register the intensity signal associated with the unique address signal. The microprocessor controls cooldown of the flash lamp by registering intensity values and deactivating the flash control circuit for a determined cooldown time when the intensity values registered in a time period exceed a predetermined threshold value.

Claims

1. A microprocessor controlled lamp flashing system comprising central controller means operative to provide output data packets, each said data packet including predetermined address signals, time base signals and control and intensity signals, a serial data link connected to said central controller means for transmitting said data packets, and a plurality of light flashing assembly means serially connected to said serial data link to receive said data packets, each said light flashing assembly means including a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge, lamp control circuit means mounted within said lamp housing and connected to said flash lamp means for producing a controlled electrical discharge to cause said flash lamp means to emit light, AC input means to couple said lamp control circuit means to an AC line voltage source, said lamp control circuit means including a microprocessor means operative to provide cooldown control for said flash lamp means by registering an intensity value for each electrical discharge of said flash lamp means and operating to terminate the provision of said electrical discharge for said flash lamp means when said registered intensity values exceed a predetermined cooldown threshold value and flash control circuit means connected to said microprocessor means for controlling the intensity of said electrical discharge for said flash lamp means, said flash control circuit means operating to generate flash trigger pulses for said flash lamp means at a preselected phase relative to the voltage on said AC line voltage source, said microprocessor means being operative to control said flash control circuit means in response to the time base, control and intensity signals in said data packets and to provide registered intensity signals to said flash control circuit means, said flash control circuit means operating to control the intensity of the light produced by said flash lamp means in response to said intensity signals and an address circuit means connected to said microprocessor means, said address circuit means being operative to preset an address into said microprocessor means, said microprocessor means operating to receive and register intensity signals from a data packet when the address signals in said data packet are indicative of said preset address.

2. The microprocessor controlled light flashing unit of claim 1 wherein said microprocessor means operates to increment a cooldown register means with an intensity value for each electrical discharge for said flash lamp means to maintain a running sum of each new intensity value with any intensity value remaining in said cooldown register means and to decrement said running sum in said cooldown register means with said time base signals.

3. A microprocessor controlled light flashing unit comprising a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge, lamp control circuit means mounted within said lamp housing and connected to said flash lamp means for producing a controlled electrical discharge to cause said flash lamp means to emit light, and AC input means to couple said lamp control circuit means to an AC line voltage source, said lamp control circuit means including a microprocessor means and flash control circuit means connected to said microprocessor means for controlling the intensity of said electrical discharge for said flash lamp means, said microprocessor means providing cooldown control for said flash lamp means by registering an intensity value for each electrical discharge for said flash lamp means and operating to terminate the provision of said electrical discharge for said flash lamp means when said registered intensity values exceed a predetermined cooldown threshold value.

4. The microprocessor controlled light flashing unit of claim 3 wherein said microprocessor means operates to increment a register means with an intensity value for each electrical discharge for said flash lamp means and to decrement said register means with spaced time base signals.

5. The microprocessor controlled light flashing unit of claim 3 which includes address circuit means connected to said microprocessor means, said address circuit means being operative to preset an address into said microprocessor means, said microprocessor means operating to activate said flash control circuit means to cause said flash lamp means to emit light upon receipt thereby of an address signal indicative of said preset address.

6. The microprocessor controlled light flashing unit of claim 5 wherein said flash control circuit means operates to generate flash trigger pulses at a preselected phase relative to the voltage on said AC line voltage source and to provide said flash trigger pulses to said flash lamp means.

7. A microprocessor controlled lamp flashing system comprising central controller means operative to provide output data packets, each said data packet including predetermined address signals, time base signals and control and intensity signals, a data link connected to said central controller means for transmitting said data packets, and light flashing assembly means connected to said data link to receive said data packets, each said light flashing assembly means including a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge, lamp control circuit means mounted within said lamp housing and connected to said flash lamp means for producing a controlled electrical discharge to cause said flash lamp means to emit light, and AC input means to couple said lamp control circuit means to an AC line voltage source, said lamp control circuit means including a microprocessor means which provides cooldown control for said flash lamp means by registering an intensity value for each electrical discharge of said flash lamp means and operating to terminate the provision of said electrical discharge for said flash lamp means when said registered intensity values exceed a predetermined cooldown threshold value and flash control circuit means connected to said microprocessor means for controlling the intensity of said electrical discharge for said flash lamp means, said microprocessor means being operative to control said flash control circuit means in response to the time base, control and intensity signals in said data packets.

8. The microprocessor controlled light flashing unit of claim 7 wherein said microprocessor means operates to increment a cooldown register means with an intensity value for each electrical discharge for said flash lamp means to maintain a running sum of each new intensity value with any intensity value remaining in said cooldown register means and to decrement said running sum in said cooldown register means with said time base signals.

9. The microprocessor controlled light flashing unit of claim 8 wherein said microprocessor means operates to terminate said electrical discharge for a predetermined time cooldown period when said cooldown threshold value is exceeded and to reset said cooldown register means at the end of said cooldown period.

10. A microprocessor controlled lamp flashing system comprising central controller means operative to provide output data packets, each said data packet including predetermined address signals, time base signals and control and intensity signals, said intensity signals being indicative of desired light intensities up to a maximum intensity value, a serial data link connected to said central controller means for transmitting said data packets, and a plurality of light flashing assembly means connected to said data link to receive said data packets, each said light flashing assembly means including a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge, lamp control circuit means mounted within said lamp housing and connected to said flash lamp means for producing a controlled electrical discharge to cause said flash lamp means to emit light of a desired intensity, AC input means to couple said lamp control circuit means to an AC line voltage source, said lamp control circuit means including a microprocessor means operative to provide a maximum intensity control for said flash lamp means by sensing the elapsed time between first and second successive intensity signals indicative of the maximum intensity value and reducing the intensity value indicated by said second intensity signal when said elapsed time is less than a predetermined elapsed time, and flash control circuit means connected to said microprocessor means for controlling the intensity of said electrical discharge for said flash lamp means, said flash control circuit means operating to generate flash trigger pulses for said flash lamp means at a preselected phase relative to the voltage on said AC line voltage source, said microprocessor means being operative to control said flash control circuit means in response to the time base, control and intensity signals in said data packets and to provide registered intensity signals to said flash control circuit means, said flash control circuit means operating to control the intensity of the light produced by said flash lamp means in response to said intensity signals and an address circuit means connected to said microprocessor means, said address circuit means being operative to preset an address into said microprocessor means, said microprocessor means operating to receive and register intensity signals from a data packet when the address signals in said data packet are indicative of said preset address.

11. The microprocessor controlled lamp flashing system of claim 10 wherein said microprocessor means operates upon receipt of an intensity indicative of a maximum intensity to increment a maximum intensity register means with a value equal to the number of time base signals occurring during said predetermined elapsed time and subsequently operates to decrement the value in said maximum intensity register means with said time base signals until the next subsequent intensity signal indicative of a maximum intensity is received thereby.

12. In a microprocessor controlled lamp flashing system having a central controller means operative to provide output data packets which each include predetermined address signals, time base signals and intensity signals indicative of desired light intensities up to a maximum intensity value, a plurality of light flashing assembly to receive said data packets, each said light flashing assembly means including a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge, and AC power input means for providing an AC power signal to said light flashing assembly means;

the invention comprising

a serial data link means serially connecting said plurality of light flashing assembly means to said central controller means, said serial data link means operating to provide said data packets to said light flashing assembly means,

each said light flashing assembly means including a microprocessor mounted within said lamp housing and connected to receive said data packet from said serial data link means, an address circuit means connected to said microprocessor means, said address circuit means being operative to preset an address into said microprocessor means, said microprocessor means operating to register intensity signals from a data packet when the address signals in said data packet are indicative of said preset address and to provide a register signal, zero crossing detector means to detect the zero crossing of said AC power signal and provide an output zero crossing signal at said zero crossings, and control circuit means connected to said zero crossing detector means and said microprocessor means, said control circuit means operating upon receipt of a register signal and an output zero crossing signal to provide an electrical discharge to said flash signal at a controlled phase relative to the phase of said AC power signal, said microprocessor means operating to control said electrical discharge to control the intensity of the light produced by said flash lamp means in accordance with said intensity signals.

13. A microprocessor controlled light flashing system comprising a source of time base signals and intensity signals indicative of desired light intensities up to a maximum intensity value, a lamp housing, flash lamp means mounted within said lamp housing for producing light in response to an electrical discharge and lamp control circuit means mounted within said lamp housing and connected to said flash lamp means for producing a controlled electrical discharge to cause said flash lamp means to emit light, said lamp control circuit means including a microprocessor means connected to receive said time base and intensity signals and flash control circuit means connected to said microprocessor means for controlling the intensity of said electrical discharge for said flash lamp means, said microprocessor means providing a maximum intensity control for said flash lamp means by sensing the elapsed time between first and second successive intensity signals indicative of a maximum intensity value and reducing the intensity value indicated by said second intensity signal when said elapsed time is less than a predetermined elapsed time.

14. The microprocessor controlled lamp flashing system of claim 13 wherein said microprocessor means operates upon receipt of an intensity signal indicative of a maximum intensity to increment a maximum intensity register means with a value equal to the number of time base signals occurring during said predetermined elapsed time and subsequently operates to decrement the value in said maximum intensity register means with said time base signals until the next subsequent second intensity signal indicative of a maximum intensity is received thereby, said microprocessor means further operating when, upon receipt of said subsequent second intensity signal, an increment remains in said maximum intensity register, to reduce the intensity value indicated by said second subsequent intensity signal.

15. The microprocessor controlled lamp flashing system of claim 13 wherein said microprocessor means operates to provide a cooldown control for said flash lamp means by registering an intensity value for each electrical discharge for said flash lamp means and operating to terminate the provisions of said electrical discharge for said flash lamp means when said registered intensity values exceed a predetermined cooldown threshold value.

16. The microprocessor controlled lamp flashing system of claim 15 wherein said microprocessor means operates to increment a cooldown register means with an intensity value for each electrical discharge for said flash lamp means and to decrement said cooldown register means with said time base signals.

17. The microprocessor controlled lamp flashing system of claim 16 wherein said microprocessor means operates upon receipt of an intensity signal indicative of a maximum intensity to increment a maximum intensity register means with a value equal to the number of time base signals occurring during said predetermined elapsed time and subsequently operates to decrement the value in said maximum intensity register means with said time base signals until the next subsequent intensity signal indicative of a maximum intensity is received thereby.