Abstract: An LED luminaire comprises LED arrays, a full-wave rectifier, an LED driving circuit, and electric current bypass circuit(s). The full-wave rectifier is coupled to an external power-line dimmer which is coupled to the AC mains and configured to convert a phase-cut line voltage into a first DC voltage. With the electric current bypass circuit(s) to partially provide a holding current path to cause the external power-line dimmer to sustain a dimming function, the LED driving circuit can provide a second DC voltage with various driving currents according to various input power levels to drive LED arrays without flickering. By adapting switching frequencies and a duty cycle, the LED driving circuit can regulate the second DC voltage to reach a voltage level equal to or greater than a forward voltage of the LED arrays no matter whether the first DC voltage is higher or lower than the second DC voltage.

Abstract: A light-emitting diode (LED) luminaire comprising LED arrays, a transceiver circuit, a voltage converter circuit, and a control circuit is adopted to convert remote control signals into PWM signals to operate the voltage converter circuit, controlling luminous intensity and color temperature of the LED luminaire. The LED luminaire further comprises a remote controller. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send the PWM signals responsive to decoded commands to control the voltage converter circuit to turn the LED arrays on and off, to tune the LED arrays up and down, and to dim the LED arrays up and down.

Abstract: A light-emitting diode (LED) luminaire control system comprising a control circuit is adopted to provide remote control signals to operate an external luminaire that comprises LED arrays and a power supply. The LED luminaire control system further comprises a relay switch, a remote controller, and a transceiver circuit. When the remote control signals are initiated by the remote controller with phase-shift keying (PSK) signals transmitted, the transceiver circuit can demodulate such PSK signals and subsequently send decoded commands to the LED luminaire control system to control the luminaire by turning on and off and dimming up and down the external luminaire.

Abstract: An anti-bacterial lighting device includes a translucent housing, a first light source, a second light source, an air-inflow port, and an air circulation mechanism. The translucent housing is air-permeable and coated with an anti-bacterial photocatalyst on its surface. The first light source is a visible light source emitting a visible light with a spectral power distribution (SPD)>95% in a visible light wavelength range (>400 nm). The second light source is a far-UVC light source emitting a non-visible light with an SPD>90% in a 200 nm˜230 nm wavelength range. The lights of the first light source and the second light source shine through the translucent housing and activates the anti-bacterial photocatalyst on the housing. The air circulation mechanism sucks an ambient air into the housing through the air-inflow port and forces the air out through the air-permeable housing.

Abstract: A light-emitting diode (LED) luminaire control system comprising a rechargeable battery and a control and test circuit is adopted to provide an emergency power to operate a luminaire that works only in alternate-current (AC) mains. The luminaire comprises LED arrays and a power supply. The LED luminaire control system further comprises a current-fed converter circuit, a control and test unit, a relay switch, a local controller, a remote controller, and a receiver circuit. When a battery discharging test is initiated by the remote controller with a band-pass signal transmitted, the receiver circuit can detect such a signal and subsequently send a decoded command to the LED luminaire control system to execute such a test by operating the luminaire without uncertainty.

Abstract: A circadian entrainment enhancement device includes a housing, a first directional light source, a second directional light source, and a driver. During daytime, the driver turns on the first directional light source with a high melanopic ratio to enhance the daytime circadian entrainment of a user. During nighttime, the driver turns on the second directional light source with a low melanopic ratio to enhance the nighttime circadian entrainment of a user. A more advanced version of the present disclosure uses a light sensor, a memory module, and a computation module to calculate the necessary light output of the device by factoring the ambient light level into consideration. An even more advanced version of the present disclosure uses a distance sensor to adjust the light level of the light sources according to the distance between the device and the user.

Abstract: A luminaire power pack comprises a rechargeable battery, an LED driving circuit, a power setting circuit, a charging circuit, and a charging detection circuit. The luminaire power pack may be used to increase functionalities of an external luminaire connected to AC mains. The LED driving circuit is configured to convert a terminal voltage from the rechargeable battery into a step-up DC voltage and to provide different output power according to power settings when a line voltage from the AC mains is unavailable. The luminaire power pack may further comprise a relay switch configured to relay either the line voltage from the AC mains or the step-up DC voltage to operate the external luminaire. The charging detection circuit is configured to enable or disable the LED driving circuit in proper situations and to meet regulatory requirements without operational ambiguity and safety issues.

Abstract: A linear light-emitting diode (LED) lamp comprising a normally operated portion and an emergency-operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally operated portion comprises LED arrays and a power supply whereas the emergency-operated portion comprises a rechargeable battery, a charging circuit, an LED driving circuit, a self-diagnostic circuit, and a charging detection and control circuit. The linear LED lamp can auto-switch from the normal mode to an emergency mode or the other way around according to availability of the AC mains and whether a rechargeable battery test is initiated. The self-diagnostic circuit comprises multiple timers and is configured to provide multiple sequences and to auto-evaluate battery performance according to the multiple sequences. During an auto-evaluation period, a terminal voltage on the rechargeable battery is examined with test results displayed in a status indicator.

Abstract: A lighting device that comprises a housing, two light sources, at least one airway, an air filter in each airway, and an air circulation mechanism for each airway. The air filter is coated with an antiviral photocatalytic coating. The first light source contributes to the light output of the device, whereas the second light source activates the photocatalyst material in the antiviral photocatalytic coating on the air filter. As the air circulation mechanism forces the air through the air filter, the airborne microbials are trapped on the surface of the air filter, and subsequently killed and decomposed by the photocatalyst material in the antiviral photocatalytic coating. With different embodiments, the present disclosure transforms the regular lighting equipment to antiviral air-filtering equipment and brings wellness lighting to the daily life.

Abstract: An anti-bacterial photocatalytic coating apparatus includes a chassis and a container containing an anti-bacterial photocatalytic coating liquid. There is a means mounted on the chassis for applying plasma-based surface activation unto a stationary surface underneath the chassis. There is also a means mounted on the chassis for spraying the anti-bacterial photocatalytic coating liquid on the surface underneath the chassis. A third means mounted on the chassis for shining UV light onto the surface sprayed with the anti-bacterial photocatalytic coating liquid. Optionally, there is a means mounted on the chassis for baking the surface sprayed with the anti-bacterial photocatalytic coating liquid. The plasma-based surface activation may be replaced with the spraying of a non-photocatalytic prime coating. The equivalent anti-bacterial photocatalytic coating processes for coating stationary surface are also introduced.

Abstract: An anti-bacterial lighting apparatus includes one translucent housing, at least one light source, and an air circulation mechanism. The translucent housing is air permeable, has as least one air inflow port, and has an anti-bacterial photocatalytic film on its inside surface. The at least one light source is inside the housing, and its light activates the anti-bacterial photocatalytic film on the housing. The air circulation mechanism, such as a fan, is at the air inflow port of the housing. It sucks the ambient air from outside the housing and forces the air through the air-permeable housing. The air-permeable housing traps airborne bacteria and viruses, and the activated anti-bacterial photocatalytic film kills the trapped bacteria and viruses. Moreover, the light shines through the translucent housing while the apparatus is filtering the air and killing the airborne bacteria and viruses.

Abstract: An LED luminaire comprises a rechargeable battery, LED array(s), two drivers, and a power outage detection circuit. The LED luminaire may be used to replace a conventional lamp connected to AC mains for use in emergency. The two drivers comprise a first driver configured to operate the LED array(s) and to manage to charge the rechargeable battery when the line voltage from the AC mains is available and a second driver configured to convert a terminal voltage from the rechargeable battery into a DC voltage to power the LED array(s) when a line voltage from the AC mains is unavailable. The power outage detection circuit is configured to enable or disable the second driver in proper situations and to meet regulatory requirements without operational ambiguity and safety issues. Furthermore, the first driver comprises a controllable current shunt circuit configured to regulate a charging current to flow into the rechargeable battery.

Abstract: A circadian lighting apparatus includes a housing, two light sources, and a control logic. The first light source has a higher color temperature (e.g. 5000K) and the second light source has a lower color temperature (e.g., 1900K). The control logic can clamp operation color temperature to a mixed high color temperature (e.g., 4000K) and a mixed low color temperature (e.g., 2700K), and operate the apparatus according to a circadian schedule such that the mixed high color temperature is used for a daytime circadian state and the mixed low color temperature is used for a nighttime circadian state, and the color temperature of the apparatus is bound by the mixed high color temperature and the mixed low color temperature. This apparatus enables a personalize-able circadian light where each user can set his/her own circadian color temperature range.

Abstract: A light-emitting diode (LED) luminaire control gear comprising a rechargeable battery and a control and test circuit is adopted to provide an emergency power to operate a luminaire that works only in alternate-current (AC) mains. The luminaire comprises LED arrays and a power supply. The LED luminaire control gear further comprises a current-fed converter circuit, a control and test unit, and a relay switch. When a line voltage from the AC mains is unavailable or when a battery discharging test is initiated, the LED luminaire control gear is automatically started to provide a high DC voltage within an input operating voltage range of the luminaire and a low-voltage conversion circuit to control the power supply to operate the LED arrays without strobing. The relay switch is configured to couple either the line voltage or the high DC voltage to the power supply to operate thereon.

Abstract: A light-emitting diode (LED) luminaire comprising a normally operated portion and an emergency operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally operated portion comprises LED arrays and a power supply whereas the emergency operated portion comprises a rechargeable battery, a charging circuit, an LED driving circuit, a self-diagnostic circuit, and a charging detection and control circuit. According to availability of the AC mains, the LED luminaire can auto-select to work in an emergency mode when a line voltage from the AC mains is unavailable. The self-diagnostic circuit comprises multiple timers and is configured to provide multiple sequences and to auto-test battery discharging current according to the multiple sequences. During an auto-test period, a terminal voltage on the rechargeable battery and an LED forward voltage across the LED arrays are examined with test results displayed in a status indicator.

Abstract: A light-emitting diode (LED) luminaire comprises a rechargeable battery, LED array(s), at least two drivers, a battery charging circuit, and a luminaire control circuit. The LED luminaire may be used to replace a fluorescent or a conventional LED lamp connected to AC mains to operate in both a normal mode and an emergency mode. The at least two drivers comprise an LED driving circuit and a power supply unit respectively configured to drive the LED arrays when AC mains are unavailable and available. The luminaire control circuit comprises a first switch circuit and a second switch circuit respectively configured to manage discharging and charging of the rechargeable battery. The luminaire control circuit further comprises a switchover circuit configured to manage an LED driving current from either the LED driving circuit or the power supply unit to drive the LED arrays without crosstalk.

Abstract: A circadian lighting apparatus includes a housing, two light sources, and a control logic. The first light source is a blue-enriched light source for stimulating human to a high circadian mode. The second light source is a blue-depleted light source for calming down human to a low circadian mode. The criteria of a good circadian lighting apparatus are identified. When coated with an anti-bacterial photocatalytic coating on the exterior, the circadian lighting apparatus becomes a disinfecting equipment that can kill the airborne bacteria and viruses that make contact to its anti-bacterial photocatalytic coated surface.

Abstract: An LED luminaire comprising LED arrays, a full-wave rectifier coupled to AC mains, a power switching converter, and an LED driving circuit coupled to the power switching converter is used to replace a conventional luminaire with a severe temporal light artifact. The power switching converter is configured to convert a first DC voltage from the full-wave rectifier into a second DC voltage with a low-frequency ripple associated with the AC mains. By adapting switching frequencies to compensate the low-frequency ripple of the second DC voltage, the LED driving circuit can regulate the second DC voltage into a third DC voltage with a ripple-reduced LED driving current to drive the LED arrays with a flicker-reduced light emission to protect users of the LED luminaire from possible health hazards such as seizures, headaches, eyestrain, reduced visual performance, migraines, etc.

Abstract: A light-emitting diode (LED) lighting system comprising a luminaire and an LED luminaire control gear is used to replace the luminaire operated with alternate-current (AC) mains. The luminaire coupled to the LED luminaire control gear comprises LED arrays and a power supply. The LED luminaire control gear comprises a rechargeable battery, a current-fed inverter, and a relay switch. When a line voltage from the AC mains is unavailable, the LED luminaire control gear is automatically started to provide a high output voltage within an input operating voltage range of the luminaire and a low direct-current (DC) voltage to control the power supply to provide an LED driving voltage greater than a forward voltage across the LED arrays, eliminating operating instability of the power supply. The relay switch is configured to couple either the line voltage or the high output voltage to the power supply to operate thereon.

Abstract: A light-emitting diode (LED) lighting system comprising a luminaire and a power pack is used to replace the luminaire operated only in a normal mode with alternate-current (AC) mains. The luminaire comprises LED arrays and a power supply whereas the power pack comprises a rechargeable battery, a charging circuit, an LED driving circuit, and a self-diagnostic circuit. According to availability of the AC mains, the LED lighting system can auto-select to work in an emergency mode when a line voltage from the AC mains is unavailable. The self-diagnostic circuit comprises multiple timers and multiple detection circuits and is configured to provide a sequence and to auto-test battery charge and discharge current according to the sequence. In another embodiment, the luminaire power pack is integrated into an enhanced LED luminaire to support such dual mode operations.