Head up display (HUD)

摘要

A Head Up Display (HUD), comprising: an image display unit, to generate input images; a virtual image generation unit, to receive said input images and generate at least a virtual image; a rotation mechanism, used to make said virtual image generation unit to change its projection angle, to project virtual images to a plurality of transmission mirrors; and a plurality of transmission mirrors, used to receive said virtual images and reflect them into a large area virtual image. Advantage of said HUD is that, size of lens and mirrors is reduced, so said HUD is miniaturized, while realizing large area image display, such that information frame of vehicle match that of outside view, hereby solving problems of single optical route display device of the prior art, that is only capable of displaying a small area image rather than a large area image.

主权项

1. A Head Up Display (HUD), comprising at least:
an image display unit generating one or more input images; at least a virtual image generation unit including a plurality of magnifying optical elements arranged into a matrix array to form a digital micro-mirror device, said virtual image generation unit sequentially addressing each of a plurality of input image portions, each image portion including a plurality of pixels, said virtual image generation unit receiving said input image portions and producing a plurality of virtual images, each virtual image corresponding to a respective one of said input image portions; a rotation mechanism controlling rotation angles of said virtual image generation unit, said rotation mechanism changing rotation angles of said virtual image generation unit to change a projection angle between a portion of said virtual images for display of said plurality of virtual images in spaced relation one from another; and a plurality of transmission mirrors, each transmission mirror respectively receiving a portion of said plurality of virtual images at a different one of said projection angles and reflecting the plurality of virtual images to a viewer to thereby appear concurrently as a large area virtual image; wherein each magnifying optical element of said plurality thereof corresponds to at least one of said pixels and is swayed by said rotation mechanism in a predetermined fashion to project a respective one of said plurality of virtual images generated thereat onto a respective one of said plurality of transmission mirrors, wherein said rotation mechanism has a plurality of swaying states, and wherein a number of said transmission mirrors in said plurality thereof substantially equals to a number of said swaying states of said rotation mechanism.