Car headlamp far and near beam integrated light-emitting diode pes unit

Abstract

The invention relates to a low-high beam integrated light-emitting diode PES unit of an automotive headlamp. The low-high beam integrated light-emitting diode PES unit comprises a partition plate (2), a transparent shading plate (4), a lens (5), low-beam LEDs and high-beam LEDs. The transparent shading plate (4) is a rectangular body and is arranged on one side, close to the lens, of the partition plate (2), and the upper end face of the transparent shading plate (4) is aligned with or approximately aligned with the upper end face of the partition plate (2); the focal point of the lens (5) is located on the upper end face of the transparent shading plate (4), and the low-beam LEDs are located above the high-beam LEDs; a first part of light emitted by the high-beam LEDs is blocked by the partition plate (2), and a second part of light is shot to the upper end face of the transparent shading plate (4) and forms total reflection due to the small incident angle, so that the low-beam stop line is formed; and light emitted by the high-beam LEDs passes through the transparent shading plate (4) to achieve transmission due to the large incident angle, the light penetrating the focal point of the lens is reflected by the lens to form parallel light, and when the high beam and the low beam are switched, seamless connection between the low beam pattern and the high beam pattern can be achieved.

Description

technical field [0001] The invention relates to a light-emitting diode (LED) PES unit integrating far and near beams of an automobile headlamp, belonging to the technical field of automobile lamp design. Background technique [0002] For headlights with integrated far and near beams, there are two conventional ways to switch the far and near beam functions: solenoid valve switching visor and fixed non-transparent visor. [0003] The disadvantages of the solution of using the electromagnetic valve to switch the shading plate are high cost, large volume, heavy weight, and high noise when the function is switched. [0004] The disadvantage of using a fixed non-transparent visor is that there is a certain thickness of the partition, which will cause obvious seams at the boundary of far and near light imaging, forming dark bars, and affecting the driver's visual experience. For details, see figure 1 , the low-beam light a passes through the focal position of the lens, and the l...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing automobile headlamp far and near light integrated light-emitting diode (LED) PES unit, or the scheme of switching the shading plate by a solenoid valve, resulting in high cost, large volume, heavy weight, and poor function switching. Noisy; or use a fixed non-transparent shading panel, the partition has a certain thickness, which will cause obvious seams at the boundary of far and near light imaging, forming dark bars, affecting the driver's visual experience

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