Multifunctional switching device for thick-wall light guide in automobile lamp

Abstract

The invention discloses a multifunctional switching device for a thick-wall light guide in an automobile lamp. The switching device comprises one or more thick-wall light guides, a circuit board is arranged below or on the side of the thick-wall light guide; a single-color LED and a double-color LED are arranged on the circuit board; the single-color LED and the double-color LED are connected witha LED control drive circuit. The LED control drive circuit comprises a drive chip. A Rohm BD18351 chip is adopted as the drive chip; an EN pin of the Rohm BD18351 chip serves as an enabling end to beconnected with a steering lamp driving signal circuit and a daytime running position lamp driving signal circuit, a PWMOUT pin of the Rohm BD18351 chip outputs PWM signals to drive the MOSFETs, and the MOSFETs are connected with the single-color LEDs and the double-color LEDs. Mutual switching of all functions is achieved through optical design and circuit driving design. Due to the integrated design, the internal structure of the lamp can be optimized, and the sense of science and technology of modern lamps can be reflected.

Description

technical field [0001] The invention relates to the fields of optics and electronics of vehicle lights, in particular to a switching application of a thick-walled light guide capable of realizing multiple functions (daytime running, position, steering), and is applied in the field of vehicle lighting. Background technique [0002] Existing automotive front lighting fixtures generally contain daytime running lights, position lights, and turn lights. The lights with these functions are used in different environments or requirements, and these three functions usually exist independently. Therefore, three independent lamps need to be configured to realize three functions, so that the internal structure of the lamp is more complicated. Contents of the invention [0003] The purpose of the present invention is to provide a device for multifunctional switching of thick-walled light guides in automobile lamps, which can conveniently and quickly switch the functions of daytime runn...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to configure three independent lamps to achieve three functions, so that the internal structure of the lamp is more complicated.

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