Synchronized pulse-enhanced dual light source

• US 4,958,143 A
• Filed: 03/01/1989
• Issued: 09/18/1990
• Est. Priority Date: 03/01/1989
• Status: Expired due to Fees

• Current Assignee: Carol Olson-Flannery, Melvin Henning, Theresa Cherrier
• Original Assignee: Melvin Henning
• Inventors: Knauff, Robert J.
• Primary Examiner(s): Orsino, Joseph A.
• Assistant Examiner(s): TUMM, BRIAN
• Application Number:
  US07/317,648
• Time in Patent Office: 566 Days
• Field of Search: 340/479, 340/469, 340/468, 340/331, 340/332, 340/467, 362/263, 362/61, 362/240, 362/276, 315/178, 315/182, 315/228, 315/232, 315/312
• US Class Current: 340/479
• CPC Class Codes: B60Q 1/2611 Indicating devices mounted on the roof of the vehicle
• CPC Class Codes: B60Q 1/46 for giving flashing caution signals during drive, other than signalling change of direction, e.g. flashing the headlights or hazard lights
• CPC Class Codes: B63B 2045/005 comprising particular electric circuits
• CPC Class Codes: B63B 45/04 the devices being intended to indicate the vessel or parts thereof

Abstract

An intermittent low intensity light source that is switched on by a drive signal is enhanced by a high intensity light source. The high intensity light source is coupled with the low intensity light source so that at least some light from both sources is projected in a desired direction. The high intensity light source has a brightness or intensity that significantly exceeds that of the low intensity light source. A pulse power source is connected to the high intensity light source and made responsive to the drive signal for pulsing the high intensity light source to emit a brief light pulse before the low intensity light source achieves any substantial precentage of its peak intensity, the light pulse occurring in such close time proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources blend together visually.

Claims

1. Apparatus for enhancing an intermittent low intensity light source that is powered by a drive signal comprising:

a. a high intensity light source optically coupled with said low intensity light source so that at least some light from both sources is projected in a desired direction, said high intensity light having an instantaneous intensity that significantly exceeds the peak intensity of the low intensity light source; and

b. pulse means connected to said high intensity light source and responsive to said drive signal for pulsing said high intensity light source to produce a light pulse before the low intensity light source achieves any substantial percentage of its peak intensity, said light pulse occurring in such close time proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources to blend together visually.

2. The apparatus as recited in claim 1 wherein the pulse means comprises:

sensing means for sensing the presence of the drive signal;

storage means for maintaining and delivering an electric charge sufficient to drive said high intensity light source for a pulse period; and

trigger means operably connected to said sensing means and said storage means for initiating delivery of said electric charge to said high intensity light source upon sensing the initial presence of the drive signal.

3. A pulse-enhanced intermittent dual light source that is switched on by a drive signal comprising:

a. a first, low intensity light source operably coupled to said drive signal;

b. a second, high intensity light source optically coupled with said low intensity light source to project light in substantially the same direction as at least some light projected from said low intensity light source; and

c. pulse means connected to said high intensity light source and responsive to said drive signal for pulsing said high intensity light source to produce a light pulse before the low intensity light source achieves any substantial percentage of its peak intensity, said light pulse occurring in such close time proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources to blend together visually.

4. The light source as recited in claim 3 wherein the first and second light sources are optically coupled by a common reflector element.

5. The light source as recited in claim 3 wherein the first and second light sources are in a common envelope.

6. The light source as recited in claim 3 wherein the low intensity light source is an incandescent light source and the high intensity light source is a gaseous arc chamber light source

7. The light source as recited in claim 6 wherein said gaseous arc chamber light source is an ionized gas flashtube.

8. The light source as recited in claim 3 wherein the drive signal is a signal derived from vehicle signalling lights.

9. The light source as recited in claim 8 wherein the vehicle signalling lights are vehicle brake lights.

10. An enhanced dual light source comprising:

a first, low intensity light source;

a second, high intensity light source optically coupled with said low intensity light source so that at least some light from both sources is projected in a desired direction; and

drive means operably coupled to said first and second light sources for stimulating the emission of a pulse of light from said second light source during a period when the first light source is also being stimulated to emit light but before said first light source reaches any substantial percentage of its peak intensity, said light pulse occurring in such close time proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources to blend together visually.

11. The enhanced light source of claim 10 wherein the drive means is operably coupled to said first and second light sources to stimulate the emission of said light pulse from said second light source in response to the same signal that powers the first light source.

12. A method of producing a pulse-enhanced light signal comprising:

a. stimulating light from a first, low intensity light source;

b. stimulating a pulse of light from a second, high intensity light source, where such pulse-stimulation causes a light pulse with a duration in the microsecond range, said light pulse being emitted before the first, low intensity light source achieves any substantial percentage of its peak value and occurring in such close proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources to blend together visually; and

c. optically coupling said light from said first and second, low and high intensity light sources such that at least some light from both sources is projected in a desired direction.

13. A pulse-enhanced intermittent dual light source that is switched on by a drive signal comprising:

a. a first, low intensity light source operably coupled to said drive signal;

b. a second, high intensity light source optically coupled with said low intensity light source to project light in substantially the same direction as at least some light projected from said low intensity light source; and

c. pulse means connected to said high intensity light source and responsive to said drive signal for pulsing said high intensity light source to initiate and complete a light pulse before the low intensity light source achieves any substantial percentage of its peak intensity, said light pulse occurring in such close time proximity to the peak intensity of the low intensity light source that persistence of vision in the human eye causes the two light sources to blend together visually.

14. The light source as recited in claim 13 wherein the first and second light sources are optically coupled by a common reflector element.

15. The light source as recited in claim 13 wherein the first and second light sources are in a common envelope.

16. The light source as recited in claim 13 wherein the low intensity light source is an incandescent light source and the high intensity light source is a gaseous arc chamber light source.

17. The light source as recited in claim 16 wherein the gaseous arc chamber light source is an ionized gas flashtube.

18. The light source as recited in claim 13 wherein the drive signal is a signal derived from vehicle signalling lights.

19. The light source as recited in claim 18 wherein the vehicle signalling lights are vehicle brake lights.