Embodiments of the disclosure provide a backlight module using MJT LEDs and a backlight unit including the same. More specifically, embodiments of the disclosure provide a backlight module, which includes MJT LEDs configured to increase an effective light emitting area of each of light emitting cells and optical members capable of uniformly dispersing light emitted from the MJT LEDs. In addition, embodiments of the disclosure provide a backlight unit using the backlight module, thereby reducing the number of LEDs constituting the backlight unit while allowing operation at low current.

A light-emitting diode (LED) luminaire dimming driver comprises a power supply circuit, a dimming interface circuit, an optocoupler circuit, an LED luminaire driving circuit, and a supplied voltage control circuit. The LED luminaire driving circuit is configured to automatically convert a constant voltage from the power supply circuit into an output DC voltage to dim an external LED luminaire in response to a dimming signal no matter whether the external LED luminaire is originally dimmable or not. The LED luminaire driving circuit is further configured to receive a pulse-width modulation (PWM) signal and to control a magnitude of the output DC voltage in response to the PWM signal. The supplied voltage control circuit comprises a relay switch configured to sense the dimming signal, to control switching between a line voltage from AC mains and the output DC voltage to operate the external LED luminaire without operational ambiguity.

A light-emitting diode (LED) tube lamp with overcurrent and/or overvoltage protection capabilities includes a lamp tube, a first rectifying circuit, a filtering circuit, an LED lighting module, and a protection circuit. The lamp tube has pins for receiving an external driving signal. The first rectifying circuit is for rectifying the external driving signal to produce a rectified signal. The filtering circuit is for filtering the rectified signal to produce a filtered signal. The LED lighting module includes an LED module, wherein the LED lighting module is configured to receive the filtered signal to produce a driving signal, and the LED module is for receiving the driving signal for emitting light. The protection circuit is configured to determine whether to enter a protection state, wherein upon entering the protection state, the protection circuit works to limit or restrain the level of the filtered signal.

An LED tube lamp having an LED unit is disclosed. The LED tube lamp includes a control circuit that selectively determines whether to perform a first mode or a second mode of lighting operation according to a state of a property of an external driving signal and a switching circuit coupled to the control circuit and the LED unit. When the control circuit determines to perform the first mode of lighting operation, the control circuit controls the second circuit in a manner such that the switching circuit maintains its on state to allow continual current to flow through the LED unit, until the external driving signal is disconnected from the LED tube lamp, and when the control circuit determines to perform the second mode of lighting operation, the control circuit controls the switching circuit in a manner to regulate the continuity of current to flow through the LED unit by alternately turning on and off the switching circuit.

Disclosed herein is a forced irradiated air shielding mechanism that is an effective protective measure against Covid-19. The UV-C irradiated forced air flow face shield described herein is compact enough to be camouflaged under a cap. In this work it is mathematically proven that the described UV-C irradiated forced air flow face shield by itself provides more effective protection against the Covid-19 or similar airborne pathogens. The shield can be enabled using a mercury discharge tube or light emitting diode (LED) irradiator. Computational fluid dynamics is presented to show that positive irradiated air pressure ensures that the only air breathed by the wearer is irradiated. Also presented is a face shield testing apparatus.

Systems and methods of providing post-operative ostomy patient care can include software and/or hardware that facilitates patient care personnel, such as a patient coach, providing remote patient care or coaching over a network to an ostomy patient. The care may be provided by specially trained former patients, nurses, or other care providers. The system can integrate sensor data from an ostomy device and inputs from the former patients, healthcare professionals, and/or device manufacturer in provide the post-operative care.

Aspects of the subject technology relate to an electronic device with a display. The display includes a first array of light-emitting diodes of a backlight unit to generate backlight for the display with each LED including an anode and a cathode. A first switch selectively couples a power supply voltage to a common anode of the first array of LEDs to control illumination of the first array of LEDs. A first discharge switch selectively couples a first voltage level to the common anode of the first array of LEDs to discharge the common anode to prevent an undesired current path through the first array of LEDs and associated undesired illumination.

A light-emitting diode (LED) tube lamp comprising a tube, end caps with contact pins and located on both ends of the tube, a first rectifying circuit and a second rectifying circuit and a filtering circuit that are coupled with the contact pins on the two end caps respectively, and a switch circuitry that is located between the rectifying circuits and the filtering circuit characterized in that the switch circuitry is capable of detecting whether the LED tube lamp is correctly installed on a lamp socket so as to reduce the risk of electric shock.

Methods and systems for improved control of dimmable, white color tunable, multiple channel LED based illumination systems are described herein. The methods and systems described herein improve the utilization of LEDs comprising a multiple channel white light LED based illumination system, along with improved control of brightness and color of emitted light. In one aspect, a multiple channel electrical power driver includes an independent current controlled Direct Current/Direct Current (DC/DC) electrical power converter electrically coupled to each LED string having a different color output. The use of independent DC/DC power converters enables current to be supplied to each LED channel simultaneously up to the rated maximum continuous operating current level in each channel. Thus, the sum of the current provided to each LED channel exceeds the rated maximum continuous operating current of each of the LED channels.

The present disclosure relates to a method and apparatus for controlling an artificial intelligent smart illumination device, such as a light bulb, LED light, or the like. In one embodiment, a switching circuit for providing switchable power to the illumination device, and a processing circuit coupled to the switching circuit, for detecting one or more power toggles of the power received by the male base, and for controlling illumination of the illumination device based on the detection of one or more detected toggles (e.g., switches) is disclosed. The disclosure includes an artificial intelligent system, which can determine a lighting status based on the user's preference, living behaviors, time of a day, energy efficiency, energy costs, and any other light using conditions and factors.