Device to excite electroluminescence

FIELD: mechanics, physics.

SUBSTANCE: device to excite electroluminescence consists of input unit connected in series with microprocessor unit, sinusoidal oscillation generator, amplitude-frequency response corrector, step-up transformer and exciting electrodes furnished with plates for the specimen to be placed there between. Note that the said exciting electrodes are optically coupled with the photo receiver connected with the ADC which, in its turn, is connected with the microprocessor unit. The latter is connected to the display unit and amplitude-frequency response corrector, while the sinusoidal oscillation generator is connected via a feedback loop with the microprocessor unit.

EFFECT: simpler design, smaller sizes, brightness correction in wide frequency range.

3 dwg

 

The technical field to which the invention relates.

The invention relates to fluorescent technology, in particular to a device for the excitation of electroluminescence.

The level of technology

Known cathodoluminescent field emission cell, including film anode, cathode and control electrode separated by a dielectric layer located on the dielectric substrate, and the film of the anode, the cathode, the dielectric layer and the control electrode is made perforated with the formation of the edges of the perforations and the substrate emission cavity and the surface of the anode is made with a coating of phosphor and an additional sealing surface.

In the cell surface of the anode is covered with a phosphor in the area of emission cavity.

In the cell substrate and/or additional coverage is made transparent (see .RU No. 2077087, CL 01J 1/02, 01J 1/30, H01J 19/24, 01J 31/12, publ. 10.04.1997,).

The disadvantage of this cell is unstable to mechanical stress, low quality light indication of the cell.

Known electroluminescent device based on conducting polymers containing spaced one above the other polymer electroluminescent layer and a layer of porous polyaniline obtained from a mixture of polyaniline and a pore-forming enclosed between two electrodes, with as pore-forming substance used, selected from a series of compounds of dinitrile azabicycloalkanes acid, dinitrosopentamethylenetetramine, N,N′-accidentsoultakerjul, N,N′-dinitronaphthalene, when the content of poroshkoobraznoe 5-50% by weight of polyaniline (see U.S. Pat. RU # 2089051, CL NW 33/14, 01J 9/20, publ. 27.08.1997,).

The disadvantage of this device is the low brightness of the electroluminescence.

The closest in technical essence and the achieved positive effect and as adopted by the authors for the prototype is a device for excitation of electroluminescence, comprising a generator of sinusoidal oscillations, power, step-up transformer and stimulating electrodes plates (see THE 6-09-31-201-87. The phosphor 3-670-115(220), date of introduction 02.01.1993 year).

The disadvantage of this device are large size, high cost, inability to adjust the brightness in different frequency ranges.

Disclosure of inventions

The task of the invention is to develop a device for the excitation of electroluminescence having a simplified design, small dimensions, low cost and the ability to adjust the brightness in different range of frequencies.

The technical result that can be obtained using the present invention is to simplify the design, reduce GABA is itow, low cost and the ability to adjust the brightness in different frequency ranges.

The technical result is achieved by the excitation device of electroluminescence, comprising a generator of sinusoidal oscillations, power, step-up transformer and stimulating electrode plates, it is equipped with an additional unit of input, the microprocessor unit, the offset of the amplitude-frequency characteristics, a sensor, an analog-to-digital Converter and display unit, when this unit is input serially connected to the microprocessor unit, a generator of sinusoidal oscillations, the offset of the amplitude-frequency characteristics, power, step-up transformer and the exciting electrode plates, and stimulating electrodes are connected through the optical channel with a sensor, which is connected to an analog-to-digital Converter, and analog-to-digital Converter connected to the microprocessor unit, which is connected to the display unit and the offset of the amplitude-frequency characteristics, and a generator of sinusoidal oscillations connected feedback to the microprocessor unit.

Brief description of drawings

Figure 1 is a given device excitation of electroluminescence, functional diagram.

Figure 2 - the same plot switching frequency n of the output device.

Figure 3 - the same, the display color of electroluminophores.

The implementation of the invention

The device electroluminescence excitation consists of a block of input 1, which is serially connected to the microprocessor unit 2, a generator 3 sinusoidal oscillations, the corrector 4 amplitude-frequency characteristics of the amplifier 5, the step-up transformer 6 and the exciting electrodes 7 made by plates (not shown), between which is placed the sample (not shown), thus stimulating electrodes 7 are connected through the optical channel with a sensor 8, which is connected to the analog-digital Converter 9, and an analog-to-digital Converter 9 is connected to the microprocessor unit 2, which is connected to the display unit 10 and the corrector 4 amplitude-frequency characteristics, and the generator 3 sinusoidal oscillations connected feedback from control unit 2.

The excitation device for the electroluminescence works as follows.

Microprocessor unit 2, the device accepts the command block input 1, in turn, the microprocessor unit 2 sends the command to the generator 3 sinusoidal oscillations, setting the frequency and amplitude of oscillation, then the generator 3 sinusoidal oscillation signal is supplied to the corrector 4 amplitude-frequency characteristics (AFC), then exit adjusting the ora 4 AFC signal is supplied to the amplifier 5, where is the gain, the signal is then fed to the step-up transformer 6, which takes on the mantle of exciting electrodes 7 AC voltage, thereby causing luminescence of the phosphor sample, placed between them, in this part of the emitted phosphor light comes on the optical channel on the photodetector 8, which converts the luminous flux into an electrical signal proportional to the intensity of radiation, in turn, the analog signal coming from the photodetector 8 is converted to digital by the analog-digital Converter 9, the received digital signal from the Converter 9 is supplied to the microprocessor unit 2, where it is the analysis and on the basis of the received data the correction is calculated for correcting the frequency response (amendment can have any functional dependence and is selected by the type of tasks: ensuring equal intensity of all colors, compensation of nonlinearity included in the device details). Based on the amendments, a signal is generated that controls the corrector 4 AFC. Also from the output of the generator 3, the portion of the signal in the microprocessor unit 2 to determine the exact frequency of the signal, which is taken into account when calculating the amendment. For ease of use the device is equipped with a block of output data 10, controlled by microprocessor unit 2.

Thus, in achiev is Tate input device excitation of electroluminescence corrector 4 amplitude-frequency characteristics have the opportunity to compensate for the nonlinearity included in the corrector 4 components thereby to provide an intensity of illumination of electroluminophores at different frequencies of excitation. By creating electric field more tension on the electrodes have the opportunity to refuse the use of hard electroluminescent capacitor, replacing it with a plane-parallel transparent plates with one conductive surface on each, in the space between them, you can make a sample of any dielectric medium.

The photodetector 8 and the analog-to-digital Converter 9 allow feedback for automatic correction of intensity of radiation.

The display unit 10 and the input block 1 are used to provide convenient use of the device.

Microprocessor 2 provides the management of all other nodes in accordance with a set program.

Figure 2 presents the diagram of the switching frequency at the output of the device in this mode is the switching frequency with an interval of 1 sec 100, 1000 and 10000 kHz, and it is also possible to set the frequency and time switching software.

Figure 3 shows the color electroluminophores when excited by different frequencies from 50 to 10,000 Hz using a corrector 4 amplitude-frequency characteristics.

The present invention as compared with the prototype and other known technical solution has the following advantages:

- the ability to create electroluminophores with variable light color depending on the frequency of excitation;

- improving the quality of electroluminophores;

- ability to initiate the electroluminescence in the phosphor deposited on any sufficiently thin dielectric surface;

- ability to change the frequency according to a programmed algorithm that allows us to see the change in color of the glow in castotnozawisimaya Zlatopramen electroluminophores.

The device excitation of electroluminescence, comprising a generator of sinusoidal oscillations, power, step-up transformer and stimulating electrode plates, characterized in that it is equipped with an additional unit of input, the microprocessor unit, the offset of the amplitude-frequency characteristics, a sensor, an analog-to-digital Converter and display unit, when this unit is input serially connected to the microprocessor unit, a generator of sinusoidal oscillations, the offset of the amplitude-frequency characteristics, power, step-up transformer and the exciting electrode plates, and stimulating electrodes are connected through the optical channel with a sensor, which is connected to the analog-digital Converter and analog-to-digital a Converter connected to the microprocessor, the output unit, which is connected to the display unit and the offset of the amplitude-frequency characteristics, and a generator of sinusoidal oscillations connected feedback to the microprocessor unit.



 

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