Head lamp for vehicle

Abstract

A head lamp for a vehicle includes a laser light source module. The laser light source module comprises a laser diode generating a laser beam. A phosphor is mounted in front of the laser diode to react to light from the laser diode to output white light. A short wave pass filter is coupled with the phosphor to transmit a laser beam from the laser diode to the phosphor and retro-reflect light scattered in remaining directions avoiding a light emitting surface of the phosphor among the laser beam incident on the phosphor to the phosphor.

Description

technical field [0001] The present disclosure relates to a head lamp for a vehicle, and more particularly, to a technique for a head lamp for a vehicle using a laser diode as a light source. Background technique [0002] Headlamps for vehicles illuminate the front of the vehicle to help drivers see the area ahead, wherein halogen, high intensity discharge (HID), LED diodes, etc. are used as light sources. [0003] However, halogen, HID, LED diodes, etc. consume high power and thus have low luminous efficiency. In particular, the overall size of an optical system including a light source and lenses of halogen, HID, and LED diodes is large, and thus, a degree of freedom in design is reduced and weight is increased. [0004] Recently, a headlamp using an environmentally friendly laser diode having a long service life and high luminous efficiency as a light source has been developed. [0005] refer to figure 1 , an existing optical system comprising a laser diode 1 generating...

AI Technical Summary

Problems solved by technology

Existing laser optics cause light losses due to light scattered towards the sides and rear of the phosphor 2, thus reducing luminous efficiency

[0007] In addition, the reflector 4 of the existing laser optical system is separately arranged outside the laser light source module 5, so that the total size of the optical size will increase, so the weight and cost will increase

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