A ghost elimination method for head-up display

Abstract

The invention discloses an echo cancellation method for head-up display. The method includes arranging an echo cancellation board on the inner surface of a front windshield of an automobile; one face which is an adhering face adheres to the inner face of the front windshield of the automobile while the other face of the echo cancellation board, which is a display face, is used for head-up display. The thickness of the echo cancellation board changes gradually, so that an included angle is formed between the adhering face and the display face of the echo cancellation board. The included angle is an included angle of the echo cancellation board. The method is easy to implement. Only the echo cancellation board needs to be added on the front shield of the automobile and no other parts needs to be added in the automobile and on the front shield. Besides, the material of the echo cancellation board is flexible and the thickness of the echo cancellation board is no greater than 2mm. The echo cancelation board can be adhered to the front shield, so that the appearance of the front shield and the sight of a driver are not influenced.

Description

technical field [0001] The invention relates to the technical field of head-up display, in particular to a method for eliminating ghosting in head-up display. Background technique [0002] With a head-up display (HUD), images are reflected off both the inner and outer surfaces of a typical windshield, and the driver sees two or more images. like figure 1 As shown, the light L0 emitted by the screen A is reflected on the inner surface of the glass (ie, the front surface), and the reflected light L1 is incident on the eyes, and the eyes regard the point A1 on the reverse extension line of the light L1 as the image of the light source A, and at the same time , part of the light L0 emitted by the light source A will enter the glass, and will be reflected on the outer surface of the glass (ie, the rear surface), and the reflected light L2 will be transmitted through the inner surface and incident on the eyes, and the human eye will reverse the light L2 on the extended line The ...

AI Technical Summary

Problems solved by technology

This technology eliminates ghosting, but it has strict requirements on the angle of the wedge-shaped film. When installing the HUD device, it is necessary to customize the front windshield according to the actual situation in advance, and the cost is high.

[0007] Although the above technical solution can solve the ghosting problem of the head-up display system, it requires professional modification of the front windshield, and the modification cost is relatively high

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