Starter circuit of pen type mercury lamp

Abstract

The invention relates to a lighting circuit of pen-shape mercury lamp, which comprises a pen-shape mercury lamp and a single chip. Wherein, the first output of single chip used to impulse control the electric switch is connected to the electric switch; the second output of single chip used to control the current of lamp to change the brightness is connected to the first input of adjusting unit via the electric switch; and the invention also comprises a high-voltage power source whose one end is connected to the ground, while another end is connected to one electrode of pen-shape mercury lamp; another electrode of mercury lamp is connected to one end of adjusting tube; another end of adjusting tube is connected to the second input of adjusting unit and one end of sampling resistance; another end of sampling resistance is connected to the ground; and the output of adjusting unit is connected to the control end of adjusting tube. Since the invention uses the controlled technique, the impulse numbers can be controlled according to the actual demand to save the energy and reduce around temperature, and since it uses the stabilization technique, the stability of lamp can be improved.

Description

technical field [0001] The invention relates to a lighting circuit, in particular to a circuit for lighting a pen-shaped mercury lamp. Background technique [0002] Because pen-type mercury lamps can emit abundant ultraviolet and visible light wavelengths, their price, volume and power consumption are much smaller than those of similar deuterium lamps and xenon lamps. Therefore, it is reasonable to use pen-type mercury lamps to replace current scientific instruments. Deuterium lamps and xenon lamps used in large quantities are an innovative attempt in some specific occasions. [0003] Depend on figure 1 It can be seen that the lighting circuit of the traditional pen-type mercury lamp uses a continuous high-voltage high-frequency pulse oscillation circuit to light because of its high starting voltage, above 1000v. However, the disadvantages of this kind of lighting circuit are also obvious: the brightness of the lamp cannot be adjusted, the on and off of the lamp cannot be ...

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Problems solved by technology

However, the disadvantages of this kind of lighting circuit are also obvious: the brightness of the lamp cannot be adjusted, the on and off of the lamp cannot be controlled at will, the power supply is large in size and heavy in weight, and the lighting requirements of about 10kHz and 1400v will consume a lot of power. High temperature is generated, and the high frequency will also affect the surrounding electronic components, making its stability worse

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