34results about How to "Normal light" patented technology

The embodiment of the invention discloses a light-emitting diode (LED) fluorescent lamp and a connecting circuit thereof. The LED fluorescent lamp comprises an LED fluorescent tube; the LED fluorescent tube comprises a first end cap and a second end cap, which comprise two pins respectively; a first bridge rectifier circuit is parallelly connected between the two pins of the first end cap; a second bridge rectifier circuit is parallelly connected between the two pins of the second end cap; the output end of the first bridge rectifier circuit and the output end of the second bridge rectifier circuit are parallelly connected with an LED lamp group which comprises an LED light source group and a circuit for supplying constant current and constant voltage. A first inductor is parallelly connected between the input end of the LED light source group and one pin of the second end cap; and a second inductor is serially connected between the output end of the LED light source group and one pinof the first end cap. By the invention, the LED fluorescent lamp can be used for directly replacing a fluorescent lamp under the condition of no change of a peripheral circuit of the conventional fluorescent lamp.

The utility model relates to a power supply system of a cold cathode tube, comprising a brightness control unit, a brightness adjustment unit, a control circuit and a voltage converter. The brightness control unit is used to receive lighting signals and output a first brightness signal within predetermined time period. The brightness adjustment unit outputs a second brightness signal according toinput of the users. The control circuit outputs power control signals according to the first brightness signal and the second brightness signal. The voltage converter outputs AC voltage to drive a lamp tube according to power control signals; wherein, within preset time period, the control circuit outputs power control signals according to the first brightness signal; after the preset time period, the control circuit outputs power control signals according to the second brightness signal.

The invention relates to a self-adaptive power matching circuit of a fluorescent lamp, which comprises a micro control unit (MCU), a driving circuit and a fluorescent lamp tube, and also comprises a detection circuit connected with the fluorescent lamp tube for acquiring a current or voltage signal of the fluorescent lamp tube. The MCU comprises a feedback detection module, a power matching module and a frequency modulation control module; the feedback detection module receives the current or voltage signal output by the detection circuit, and converts an analog signal into a digital signal; the power matching module receives the signal and performs power matching processing, and detects the starting frequency of the fluorescent lamp tube; and the frequency modulation control module outputs pulse width modulation wave corresponding to the installed fluorescent lamp tube according to the starting frequency, and enables the fluorescent lamp tube to emit light normally through the driving circuit. The invention also relates to a self-adaptive power matching method for the fluorescent lamp. Through the circuit and the method, the ballast can adapt to a plurality of lamp tubes with different power, and the waste and high use-cost caused by replacing the ballast due to replacing the fluorescent lamp tube are avoided.

The invention belongs to the field of optoelectronic materials, and discloses a method based on room temperature ABX n Y 3‑n Ligand control method and application of perovskite nanoparticles. The control method is to mix multiple precursors containing A ions, ultra-short-chain ligands, and sodium ions with fatty acids at room temperature, and quickly inject them into the In the precursor solution of B ions, quickly add the precursor solution of alkyl ammonium halide to it after stirring, and continue to stir to obtain the crude solution of perovskite nanoparticles; after washing, the ligands on the surface are mainly composed of long-chain ligands. ABX composed of alkyl ammonium halides, long-chain ligands fatty acids, ultra-short-chain ligands and metal ligands sodium ions n Y 3‑n Perovskite nanoparticles. The present invention selects ultrashort ligand and metal ligand Na + When added to the precursor, the long-chain ligands on the surface of the obtained perovskite nanoparticles are effectively reduced, and the ultra-short-chain ligands are effectively increased. It has both stability and high-efficiency charge transport characteristics, and can greatly improve the light-emitting diodes based on it. device performance.

The invention discloses a shading window, and belongs to the field of glass door windows. According to the shading window, light near the window is shielded, and the need of indoor normal light transmission is met while shielding is conducted. The shading window is characterized in that a first curtain and a window frame are included; a second supporting rod is arranged at the lower end of the window frame and fixedly connected with the lower end of the first curtain; a sliding rod is arranged in the window frame in the vertical direction and slidably connected with a first sliding block; andthe first sliding block is connected with the upper end of the first curtain, and a first driving piece for driving the first sliding block to slide on the sliding rod is arranged in the window frame.

The invention relates to a built-in power type safe LED fluorescent tube lamp holder which is characterized by being provided with a circular shell, wherein the shell is divided into a front part and a back part by a partition; the front part is a closed cavity, and the rear part is an open structure which is combined with the tube lamp body; the front end face of the closed cavity is provided with a pair of lamp holder contact pins, and middle part of the cavity is provided with a position sensor unit which forms a loose fit with the inner diameter of the shell; the position sensor unit is made of an insulating material; a position sensing ball, which is exposed outside the front end face and has the function of retraction, is arranged between the position sensor unit and the front end face; a pressure spring is arranged between the position sensor unit and the partition; the position sensor unit and the partition are respectively provided with an electricity applying contact and an electricity receiving contact matched with the electricity applying contact; and the lamp holder contact pins are electrically connected with the electricity applying contact. The invention is convenient to use and greatly enhances the electricity use safety.