9 results about "Diode array" patented technology

The invention relates to a light emitting diode drive system, comprising a microcontroller, a control circuit, a pulse width modulation controller, a first drive circuit, a second drive circuit, a first conversion circuit and a second conversion circuit. When a three-dimensional display is carried out on a display faceplate by the microcontroller, three-dimensional micro control signals are output. When the three-dimensional micro control signals are received by the control circuit, three-dimensional control signals are output. The second conversion circuit is connected with an external direct current voltage source, the control circuit and the second drive circuit; when the three-dimensional display is carried out on the display faceplate, according to the output of the second drive circuit, the external direct current voltage source is transformed to second direct current voltage so as to drive a light emitting diode array together with the first conversion circuit; and when a two-dimensional display is carried out on the display faceplate, the work stops. The invention also provides a display device. Under two-dimensional and three-dimensional modes, the light emitting diode drive system can change the output of the second drive circuit so as to meet the requirements of different loads and improve the elasticity selected by elements.

The invention discloses a method for rapid determination of isothiazolinone compounds in a water-based adhesive for cigarettes. The method comprises the following steps: adding an extraction agent into the water-based adhesive for cigarettes, wherein a volume mass ratio of the extraction agent to a water-based adhesive sample is 5-40 mL: 0.3 g; then carrying out ultrasonic extraction for 5 to 45 min so as to obtain extract liquor; subjecting the obtained extract liquor to centrifugation, taking supernatant and introducing nitrogen into the supernatant so as to obtain concentrated supernatant; allowing the concentrated supernatant to pass through a filter membrane so as to obtain a to-be-detected solution; and carrying out quantitative analysis on the isothiazolinone compounds in the to-be-detected solution by using ultrahigh performance liquid chromatography-diode array. The method provided by the invention can carry out simultaneous analysis and detection on at least three isothiazolinone compounds in the water-based adhesive for cigarettes; the method is simple in treatment and fast in analysis speed; detection results are good in repeatability and high in sensitivity; and the method is applicable to determination of three isothiazolinone compounds in the water-based adhesive for cigarettes or in other complex matrixes.

The invention belongs to the technical field of detection methods and particularly relates to a method for detecting the content of blue dyestuff in a textile and a leather product. The method comprises the steps ofby taking the textile or the leather product as a sample, and cutting the sample into pieces; weighing a certain amount of sample into a reaction pipe, then adding a polar organic solvent into the reaction pipe, enabling the mass ratio of the sample tothe polar organic solvent to be 1 to (5-50), and then putting the reaction pipe into an ultrasonic cleaner to carry out ultrasonic extraction; after the extraction is finished, taking out the reaction pipe, cooling, fully shaking, standing, and filtering supernatant liquor into a sample bottle; anddetectingand analyzingthe blue dyestuff in sample solution byadopting a high-performance liquid chromatograph with a diode array detector. Compared with the prior art, the method has the beneficial effects that not only can the qualitativeness be accurate, but also the quantitativeness can be accurate. The method has various advantages of low detection limit, good repeatability, low cost, convenience and fastness and the like, and the requirements of the European-union instructions and regulations for managing and controlling the blue dyestuff can be completely met.