Driving circuit of LEC luminescence sheet

Abstract

The invention provides a driving circuit of an LEC luminescence sheet. The driving circuit comprises a filter circuit, a correcting circuit and an inverter circuit. The filter circuit is provided withan 2A slow-melting type fuse, two differential-mode capacitors of C1 and C2, two common-mode capacitors of C3 and C4, and two common-mode choking coils of L1 and L2. An EMI filter circuit is providedwith a voltage maintaining circuit formed by a piezoresistor RV1 and resistors R1, R2 and R3. Inductance values of the common-mode choking coils are 2.4mH and 2.0mH. A value of the common-mode capacitors is 2200pF. The differential-mode capacitors are 220nF, 275V and 470nF, 275V thin-film capacitors. In the invention, the structure is simple, usage is convenient, power consumption is low, a service life is long, and a light and dark color adjustment ability is high.

Description

technical field [0001] The invention belongs to the technical field of cold light sheets, and in particular relates to a driving circuit of an LEC cold light sheet. Background technique [0002] The first generation of cold light film is EL cold light film. Electro Luminescence (Electro Luminescent) is referred to as EL. EL luminescent film is a physical phenomenon in which the electric field generated by the AC voltage applied to the electrodes at both ends excites the fluorescent material to emit light, that is, the phenomenon of electric field luminescence. Combining multiple substances to produce light sources of different colors. It has the characteristics of low power consumption, soft light, no ultraviolet rays, various colors, long life, and no heat generation, so it is commonly known as cold light source. Cold light source is different from traditional point or line light emitting mechanism. , but a uniform and integral surface-emitting body, and it is also a kind ...

AI Technical Summary

Problems solved by technology

Compared with EL, the main difference between LEC and EL is the difference in the base material used. The driving circuit on the traditional cold light chip has a larger circuit board area, and the control of light and dark changes is realized by controlling the input voltage or controlling the frequency of the oscillation circuit. Half-wave circuits or full-wave circuits have their own defects, resulting in unstable use of the formed drive circuit, small reduction in power consumption, and less than ideal working life

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