A lighting device and an automotive lighting fixture

Abstract

The invention protects an illuminating device, comprising: a laser light source, used for emitting excitation light; a wavelength conversion device, arranged on the optical path of the excitation light, for absorbing at least part of the excitation light, and emitting the stimulated light and the untreated light Absorbed excitation light, the wavelength conversion device includes a light conversion element, the light conversion element is a single crystal or transparent ceramics, and the light conversion element includes an incident surface, an exit surface and a side surface; a diffuse mirror is arranged on the light On the optical axis of the conversion element, it is used to reflect the unabsorbed excitation light and expand its light divergence angle; the received light emitted by the wavelength conversion device combines with the excitation light emitted by the diffuse mirror to become the Emitting light from the lighting device. The illuminating device can provide illuminating light with high brightness and good safety performance. The invention also protects an automobile lighting fixture including the lighting device.

Description

technical field [0001] The invention relates to the field of illumination, in particular to an illumination device and an automobile illumination lamp. Background technique [0002] This section is intended to provide a background or context to a detailed description of the invention that is recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Among the existing automotive lighting technologies, LED lamps, xenon lamps and halogen lamps are the most widely used light sources. However, these types of light sources have disadvantages such as insufficient brightness, insufficient service life, and large beam divergence angle, resulting in insufficient lighting distance. As an emerging lighting technology, laser headlights have appeared on a few models. This lighting method has high brightness and long service life, and because of the small divergence angle of the laser beam collimation, the emitted beam can be ...

AI Technical Summary

Problems solved by technology

However, the combination of laser and transparent luminescent ceramics is different. In the laser with a small divergence angle, the unabsorbed part is directly emitted at a small divergence angle, which is completely different from the light distribution of the received laser light, which will lead to uneven distribution of the entire emitted light.

Therefore, for a long time, transparent luminescent ceramics were considered unsuitable for high-brightness laser remote excitation illumination.

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