Laser printer

Abstract

The embodiment of the invention provides a laser printer which comprises an opening cover, a detection unit, a heater, a first power supply unit, a temperature detection unit, an element abnormality detection unit and a temperature control protection unit; the detection unit is used for detecting whether opening cover is opened or not; the heater produces a heat source under a heating power supply; the first power supply unit is coupled to the detection unit and the heater; a temperature detection element is used for detecting a temperature of a lamp tube of the laser printer and generating afirst detection signal; the element abnormality detection unit is used for detecting whether the temperature detection element normally runs or not and generating a second detection signal; and the temperature control protection unit generates a control signal according to the first detection signal and the second detection signal to decide whether the laser printer can normally run or not. The laser printer can detect whether the temperature detection element is abnormal or not and can stop from lighting the lamp tube when the temperature detection element occurs an abnormal condition of a short circuit or an open circuit to enable the laser printer to normally run.

Description

technical field [0001] The invention relates to the field of laser printing, in particular to a laser printer. Background technique [0002] With the advent of the information age, it not only accelerates the popularization of personal computers, but also activates the market for computers and their peripheral devices. Therefore, various information products are constantly being introduced, and various information equipments are also trending toward diversification. Most of the image display methods of today's computers use monitors and printers as image output devices. Moreover, printers can be roughly divided into three types according to types, namely dot matrix printers, inkjet printers, and laser printers. Among them, laser printers occupy a place in the printer market due to their advantages such as high printing quality, fast printing speed and low average cost of consumables. [0003] Traditionally, during the imaging process of a laser printer, the toner attached...

AI Technical Summary

Problems solved by technology

However, under this design framework, when the controller inside the laser printer is abnormal or loses its function, the user opens the front cover, rear cover or side cover of the laser printer to discharge paper, or replace the toner cartridge or heat When using the heater, since the heating power supplied to the heater cannot be effectively cut off, the user may still be burned

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