9 results about "Ultraviolet light emitting diodes" patented technology

Techniques for reducing biofouling on optical equip- ment, using minimum power in a marine environment are provided. An example of an apparatus according to the disclosure includes a housing including a cavity and an ultraviolet transparent window disposed over the cavity, an optical device disposed in the cavity and directed towards the ultraviolet transparent window, one or more ultraviolet light emit- ting diodes disposed in the cavity and directed towards the ultraviolet transparent window, and a controller operably coupled to the one or more ultraviolet light emitting diodes and configured to provide at least one lamp power function to the one or more ultraviolet light emitting diodes, wherein the at least one lamp power function is based on at least a flash power value, a flash duration, a rest power value and a rest duration.

Provided are an ultraviolet light emitting diode (LED) and a manufacturing method thereof. The manufacturing method includes: providing an LED wafer including a substrate and a semiconductor stacked layer, the semiconductor stacked layer has a lower surface and an upper surface, the semiconductor stacked layer includes a first semiconductor layer, a light emitting layer and a second semiconductor layer; focusing a first laser beam and a second laser beam into the substrate, a focusing position of the first laser beam is closer to the lower surface than that of the second laser beam, the first laser beam is focused to form at least one first laser cutting line, laser scratches of each first laser cutting line are quasi-circular, and the at least one first laser cutting line includes a laser cutting line closest to the lower surface; and separating the LED wafer to form LED chips.

The invention provides an intelligent refrigerator peculiar smell detecting and processing device, and belongs to the technical field of refrigerator production.The intelligent refrigerator peculiar smell detecting and processing device is characterized in that a multi-dimensional data acquisition system comprising a gas sensor array and a temperature and humidity sensor is constructed, and low-frequency trend components of sensor signals are extracted through wavelet transformation; a sparse coding-based dictionary learning and deep expansion network combined temperature drift compensation model is used to realize self-adaptive correction of a sensor baseline, and feature matrix construction and cosine similarity calculation are combined to complete peculiar smell type identification and concentration level quantification. And the power of the ultraviolet light emitting diode and the rotating speed of the fan are dynamically adjusted through a thermodynamic entropy increase minimization purification control algorithm to realize efficient purification, so that the technical problem of insufficient detection accuracy caused by serious baseline drift of the refrigerator odor sensor in a temperature fluctuation environment is solved.

A disinfection device for disinfection of medical equipment includes a housing comprising a disinfection chamber. The disinfection chamber is adapted to at least partly enclose a section of a medical equipment. At least one ultraviolet light emitting diode (UV-LED) is configured to emit UV-light directly into the disinfection chamber. A control unit is configured to control the UV-LED. An integrated power source is connected to the UV-LED. The control unit is further configured to run a plurality of disinfection cycles each comprising an on-period of UV-light emission from the UV-LED and an off-period of no UV-light emission from the UV-LED.

The utility model relates to ultraviolet lamp sterilization technical field especially, a kind of LED light bar module for sterilization;By setting up the double power supply loop of independent first wiring end, second wiring end, third wiring end and fourth wiring end, and in each loop series constant-current drive chip or current-limiting resistor, realize the current separation control of two ultraviolet LED lamp strings, it is favorable to solve the uneven problem of current distribution caused by LED parameter discreteness in traditional single-path drive, ensure that each deep ultraviolet LED element works at optimum current value, can make current fluctuation greatly reduce, ultraviolet light power output stability greatly improves, thereby significantly improve the inactivation efficiency to bacteria, virus, especially suitable for medical appliance disinfection and other strict scene to sterilization intensity requirement;Solved when using deep ultraviolet light emitting diode to disinfect, for the precise control of its power still shows insufficient to affect its disinfection effect and overall application efficiency technical problem.

The present application provides an ink curing conveyor, which comprises: a mounting and dismounting structure of LED modules applying UV-LED (ultraviolet light emitting diode), the LED modules generating ultraviolet rays of different wavelengths; a lifting structure of a lifting body of the LED modules; a conveyor provided with the lifting body; and a controller which can be docked and installed on the conveyor. The wavelengths of the ultraviolet rays irradiated by the LED modules are different. The mounting and dismounting structure of the LED modules comprises a banana plug and a banana socket.

An air cleaner capable of removing bacteria and viruses. The air cleaner includes: a main body including a suction hole through which air is introduced and a discharge hole through which air is discharged; an ultraviolet (UV) irradiation device disposed between the suction hole and the discharge hole, and including a UV light emitting diode (LED) configured to transmit ultraviolet rays toward the discharge hole; a photocatalyst filter including a photocatalyst provided to generate active oxygen by reacting with the UV rays transmitted from the UV LED, and disposed between the UV irradiation device and the discharge hole; and a light blocking member disposed between the UV LED and the suction hole to prevent the UV rays transmitted from the UV LED from being emitted to an outside of the main body through the suction hole.

The application discloses a deep ultraviolet light emitting diode with a patterned photon absorption structure and a preparation method thereof. The diode comprises, from bottom to top, a substrate, an AlN buffer layer and an N-type AlGaN layer; wherein, one side of the N-type AlGaN layer is exposed, and the upper surface of the unexposed part of the N-type AlGaN layer is sequentially covered, from bottom to top, with a multi-quantum well layer, a P-type electron blocking layer, a P-type AlGaN layer and a P-type GaN layer; the upper surface of the P-type GaN layer is arrayed with oxide nanostructures; a P-type ohmic contact layer covers the oxide nanostructures and the P-type GaN layer, and also forms an arrayed structure; and a metal mirror layer covers the P-type ohmic contact layer. The application improves the hole injection efficiency of the deep ultraviolet LED and inhibits the conversion of absorbed light into heat energy.