Light far and near light dimming control circuit

Abstract

The invention provides a car lamp far-near light switching control circuit and belongs to the technical field of cars. The car lamp far-near light switching control circuit comprises a power supply circuit, a solenoid valve control circuit and an electronic ballast control circuit. The solenoid valve control circuit and the electronic ballast control circuit are connected with the power supply circuit respectively. The electronic ballast control circuit comprises a first relay and an electronic ballast controlled by the first relay. The solenoid valve control circuit comprises a second relay and a solenoid valve circuit. The power supply circuit comprises a near light control end, a far light control end and a common end which are connected to the two ends of the first relay through positive electrode conducting parts and negative electrode conducting parts respectively. The common end and the far light control end are connected with the two ends of a coil of the second relay respectively. The problem that a car light switching power supply is divided into a positive electrode light switching power supply and a negative electrode light switching power supply, so that a light switching control circuit has no universality is solved, in addition, the problem that a relay is too high in temperature is solved, and the reliability and the stability of the relays are greatly improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a dimming control circuit for far and near light of a car lamp. Background technique [0002] As we all know, the English abbreviation of high-intensity discharge lamp (HID) is commonly known as xenon lamp. This lamp is a high-tech product of current automobile headlights. It is widely used in high-end cars. But it can only be used in special lamps for high-end cars, and it cannot be used in the existing medium and low-end car H4 lamps. This is because its light source structure is different from that of ordinary H4 halogen tungsten lamps. There are two sets of filaments, one is the high beam light source, the other is the low beam light source, and the xenon lamp has only one light source, which can only be used on special lamps to bring out its advantages. [0003] At present, there are still many technical defects in the existing telescopic dimming xenon lamp control circuit. For ...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is the problem that the far and low beam control circuit of the car lamp does not have universality when the power supply of the automobile headlight is divided into a positive pole dimming power supply and a negative pole dimming power supply. High and low light control circuit for car lamps for positive dimming power supply and negative pole dimming power supply

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