Power supplier for field emission display

Abstract

The utility model relates to a power supply used for the field emission display, comprising a power source controller, a high voltage output circuit and a high voltage / low voltage / negative voltage output circuit; wherein the power source controller comprises a pulse frequency modulator, an oscillator, a comparator and a digital logic circuit, which are used to drive the external system circuit; the high voltage output circuit comprises a flyback converter and a voltage doubling rectifier circuit, which are used for outputting a high voltage; the high voltage / low voltage / negative voltage outputcircuit comprises a booster circuit which is used for outputting a low voltage, a voltage tripler charge pump and a linear voltage-stabilizing circuit which are used for outputting a middle high voltage, a two times voltage charge pump circuit and a negative voltage-stabilizing circuit which are used for outputting a negative voltage.

Description

technical field [0001] The invention relates to a power supply, in particular to a power supply applied to a field emission display. Background technique [0002] The so-called field emission display (Field Emission Display, FED), its principle is very similar to the cathode ray tube (Cathode Ray Tube, CRT). A display technology. The cathode ray tube uses a single thermal electron gun or three thermal electron guns to emit electrons, and then bends the electrons through the electromagnetic field to make them hit the required corresponding phosphor position; therefore, when the size of the cathode ray tube display increases, the electron beam The path required for deflection to occur must also be increased, which increases its thickness. The field emission display has its own electron emission source under each pixel, so that the electrons will not need to be deflected and can directly hit the phosphor to emit light, realizing the concept of thinning the cathode ray tube di...

AI Technical Summary

Problems solved by technology

However, these four sets of conversion circuits not only take up a lot of space and are not conducive to the miniaturization of the power supply, but also the existence of magnetic components such as three inductors L1-L3 and the transformer T will generate greater electromagnetic interference.

Therefore, the conventional circuit structure of the power supply used in the field emission display will not only increase the cost, but also be detrimental to the performance of the system against electromagnetic interference

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