Drive circuit of humanoid traffic signal lamp

Abstract

The invention discloses a drive circuit of a humanoid traffic signal lamp. The drive circuit comprises a power supply unit, a rectification unit, a filtering voltage stabilization unit, and a display unit, wherein the power supply unit, the rectification unit, the filtering voltage stabilization unit, and the display unit are sequentially connected with one another. By means of a circuit connection manner of the display unit of the drive circuit, when a light-emitting diode (LED) lamp is damaged, work of other LED lamps in a series branch is not affected, meanwhile, the condition that the LED lamp is damaged by overlarge pressure drop caused by overlarge current flowing through other branches is avoided, problems of traffic jam caused by break-down of traffic lights during usage are avoided, and meanwhile, maintenance costs are saved. The voltage stabilization unit uses a three-terminal voltage stabilization chip, so that supply voltage of the display unit is more stable, impact on the LED lamp due to unstable voltage is avoided, and service life of the LED lamp is prolonged.

Description

technical field [0001] The invention belongs to the technical field of application of traffic lights, and in particular relates to a driving circuit of a human-shaped traffic signal light. Background technique [0002] The light source of LED traffic signal lights is composed of multiple LEDs, while traditional light sources such as incandescent lamps and halogen lamps are all lighted by a single bulb. Therefore, traditional light sources only need to consider one focal point in the design, and it is easier to distribute the light distribution. However, multiple focal points must be considered in the design of LED light sources, and there are certain requirements for the installation of LEDs. If the installation is inconsistent, it will affect the uniformity of the light effect of the light-emitting surface. Therefore, it is necessary to consider how to avoid this defect in the design. , if the optical design is too simple, the light distribution of the signal light is mainl...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a driving circuit for a human-shaped traffic signal lamp. By changing the circuit connection mode of the display unit, it solves the problem that when one LED is damaged, the four LEDs connected in series will not light up. When there is a problem with one branch circuit, the other branch circuit will suffer from excessive current and cause damage

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