Dimming circuit for automotive interior ambient light

Abstract

The present invention relates to the technical field of dimming of automobile indoor lamps, in particular to a dimming circuit for indoor ambient lamps of automobiles, comprising a PWM pulse generating unit and a brightness adjusting unit, the PWM pulse generating unit is connected to a center console, and the center console is used to adjust the PWM pulse The duty ratio of the generation unit, the PWM pulse generation unit generates a corresponding PWM brightness adjustment pulse according to the duty ratio, and the brightness adjustment unit adjusts the brightness of the ambient light through the PWM brightness adjustment pulse. The dimming circuit of the automobile indoor atmosphere lamp of the present invention can control the brightness of the ambient lamp within a certain range in real time through the touch screen software of the center console when the user uses it, so as to achieve the function of adjusting the atmosphere in the car.

Description

technical field [0001] The invention relates to the technical field of LED dimming, in particular to the dimming technology of indoor atmosphere lights of automobiles. Background technique [0002] Interior ambient light is the abbreviation of flexible high-brightness astigmatism optical fiber LED ambient light. It is a decorative lighting, usually red, blue, green, etc., mainly to make the car more beautiful at night, enhance the atmosphere inside the car, enhance sensory stimulation, improve the driving experience of the car, and indicate the grade of the whole car. The main material of the ambient light in the car is LED. As a light source, white LEDs are increasingly used in automotive electronics. With the advancement of the times, people's requirements for electronic products continue to increase. Many customers hope that the brightness of the light source can be adjusted in different applications. At present, there are three main dimming technologies: PWM dimming, a...

AI Technical Summary

Problems solved by technology

He uses the LED driver to switch repeatedly to realize the dimming function. The user's system only needs to provide digital pulses with different widths and narrows to simply change the output current to adjust the brightness of the white LED. However, the existing car interior The light cannot be quickly controlled by the user for lighting and can also be controlled by the driving computer and used as an atmosphere light as the environment changes.

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