Synthesized lighting device
First Claim
1. A lighting device, supplied with electrical power, for illumination and improved color perception by an observer of external surfaces, which comprises:
- (a) a first subassembly comprising at least one lamp for emitting a first beam of photometric energy of a first spectral distribution and a first median wavelength which remains relatively stable over a given range of said power;
(b) a second subassembly comprising at least one lamp for emitting a second beam of photometric energy of a second spectral distribution with a second median wavelength which remains relatively stable over said given range of power and that differs from that of said first median wavelength;
(c) means to combine and project said first and second beams of photometric energy from said lighting device such that when the composite energies are used to illuminate an external surface said composite energies are perceived by said observer as a synthesized third spectral distribution with a median wavelength differing from both said first and said second median wavelengths; and
(d) means for an automatic diminishment of shifts of said median wavelength of said synthesized composite energies resulting from disproportionate changes in the photometric energies emitted by said first and second subassemblies initiated by changes in power consumed by said lighting device due to variations of said supply of electrical power by degradation and voluntary adjustments.
1 Assignment
0 Petitions
Accused Products
Abstract
Lighting devices for portable and fixed applications use two or more light sources having differing spectral colors and electrical circuit parameters to shape spectral energy distributions of beams of illumination for projection upon external objects and surfaces so as to enhance an observer'"'"'s perception and discrimination of information displayed thereon, while reducing the radiation of inefficient energies at undesired color spectra. Electrical parameters of the differing light sources are used in sensitive circuits to monitor the condition of battery power and to automatically extend the range of effective illumination produced as the applied power degrades.
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Citations
25 Claims
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1. A lighting device, supplied with electrical power, for illumination and improved color perception by an observer of external surfaces, which comprises:
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(a) a first subassembly comprising at least one lamp for emitting a first beam of photometric energy of a first spectral distribution and a first median wavelength which remains relatively stable over a given range of said power; (b) a second subassembly comprising at least one lamp for emitting a second beam of photometric energy of a second spectral distribution with a second median wavelength which remains relatively stable over said given range of power and that differs from that of said first median wavelength; (c) means to combine and project said first and second beams of photometric energy from said lighting device such that when the composite energies are used to illuminate an external surface said composite energies are perceived by said observer as a synthesized third spectral distribution with a median wavelength differing from both said first and said second median wavelengths; and (d) means for an automatic diminishment of shifts of said median wavelength of said synthesized composite energies resulting from disproportionate changes in the photometric energies emitted by said first and second subassemblies initiated by changes in power consumed by said lighting device due to variations of said supply of electrical power by degradation and voluntary adjustments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A lighting device, supplied with electrical power, for the illumination and improved color perception by an observer of external surfaces, which comprises:
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(a) a first subassembly comprising at least one lamp for emitting photometric energy in a first distribution of spectral wavelengths with a first median wavelength; (b) a second subassembly comprising at least one lamp for emitting photometric energy in a second distribution of spectral wavelengths and a second median wavelength that differs from said first median wavelength by at least 40 nanometers; (c) a circuit of interconnections of said lamps of said first and second subassemblies with said supply of electrical power; and (d) a synthesizer, controlling said photometric energy emissions of said first and second subassemblies, for the formation of a composite illumination of a third spectral distribution and third median wavelength for radiation from an exit aperture of said lighting device. - View Dependent Claims (13, 14)
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15. A lighting device with a monitor for the condition of batteries and line supplies of electrical power, which comprises:
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(a) a first light emitter operative at a first spectral color of the visible wavelengths for levels of said electrical power exceeding a first threshold for light emission; (b) a second light emitter operative at a second spectral color of the visible wavelengths for levels of said electrical power exceeding a second threshold for light emission; (c) an electrical circuit comprising; said first light emitter operative when the applied power exceeds said first power threshold; and said second light emitter connected in parallel with said first light emitter operative when the applied power exceeds said second power threshold; and (d) means to combine for projection from said lighting device said first and said second spectral colors to form a third spectral color for projection; and (e) means for viewing the combined light emissions and the change of color as said electrical power falls in the region between said first and said second thresholds for light emission. - View Dependent Claims (16, 17)
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18. A lighting device, for illumination and color perception supplied with electrical power, for efficiency and extended operation at low power levels, which comprises:
(a) at least one series electrical circuit for dividing the available supplied power among the elements connected therein, which comprises; a first light emitter, operative at applied power exceeding a first threshold for light emission of a first color; a second light emitter, operative at applied power exceeding a second threshold for light emission of a second color, said second threshold different from said first threshold; a means to combine for projecting from said lighting device the light energies emitted from said first and second emitters. a means for automatic proportionment of said available power upon each of said emitters of the series circuit for effecting continued combined light emission over an extended range of said available power. - View Dependent Claims (19, 20, 21)
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22. A lighting device, supplied by an alternating current power source, for the illumination and color perception of external surfaces, which comprises:
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(a) a group of light emitting diode solid state junctions for the emission by each said junction specific colors of the visible energy spectrum; (b) a circuit connection of said light emitting diode junctions in back-to-back polarity for bi-color emission of light on the full waveform of said alternating current power source; and (c) means for synthesizing a composite beam of illumination of a shaped energy profile of spectral wavelengths for illumination of said external surfaces. - View Dependent Claims (23, 24, 25)
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Specification