Nippon Seiki Co., Ltd.

Kazuya Matsuura

Yuichi Takahashi

Megumi Sato

Kazuo Morohashi

Takashi Yamazoe

Tsuyoshi Kasahara

Yuta Kikuchi

Takanori Shigeno

Hiroteru Haruyama

Takayuki Hatano

Maiko Saito

Takeru Kawai

The purpose of the present invention is to efficiently orient image light toward an observer. A display device outputs projection light for displaying an image. A transmission type screen forms an image of the projection light and diffuses the same as image light. A projection lens enlarges projection light and forms the image on the transmission type screen. A light distribution adjustment means is disposed between the transmission type screen and the projection lens and adjusts the light distribution of the image light output by the transmission type screen for each region by refracting the projection light.

Head-up display device

The purpose of the present invention is to provide a compact and low-cost head-up display device capable of creating a sense of depth in a virtual image. This head-up display device includes a light-emitting device, a reflecting mirror, and a screen. The reflecting mirror includes two reflecting surfaces that are a first reflecting surface having a flat shape and a second reflecting surface having a curved shape. The screen is composed of a first screen through which the light reflected from the first reflecting surface passes, and a second screen through which the light reflected from the second reflecting surface passes. The first screen and the second screen are disposed so that the length of a first optical path in which the light emitted from the light-emitting device reaches the first screen is different from the length of a second optical path in which the light emitted from the light-emitting device reaches the second screen.

Provided is a head-up display which facilitates the differentiation of information contained in a stereoscopic display and which enables display having a stereoscopic effect, by rotating either a first display surface of a first image generation unit corresponding to a first virtual image display surface, or a reflection unit for aiming first display light emitted from the first image generation unit at a front window shield (transmission/reflection unit), to change the angle formed by the first virtual image display surface and a second virtual image display surface.

Head-up display

The present invention is compact and inexpensive, has good light efficiency, and enables a display image having a plurality of display distances to be displayed. A display emits projection light for displaying a display image at a predetermined position, and an image formation position adjusting mirror receives the projection light emitted from the display, performs conversion into a plurality of first projection light and second projection light that have different image formation distances by changing the image formation distance of the projection light that is at least part of the incident projection light, and reflects the first projection light and the second projection light to project the first projection light and the second projection light onto a first screen and a second screen.

Projection device and head-up display device

Provided are: a backlight unit that is capable of increasing the degree of freedom in design of a device on which the backlight unit is mounted; and a display device which is provided with this backlight unit. This backlight unit is provided with: a light source which emits light that illuminates a liquid crystal display element; a light collection means for focusing the light emitted from the light source on a display region (A) of the liquid crystal display element; and a reflective part which has a reflective surface that reflects the light emitted from the light source toward the liquid crystal display element. This backlight unit is configured such that the optical path for the light from the light source to the liquid crystal display element is replicated at the reflective part by having the reflective surface inclined to the optical axis (AX) of the light source.

Headup display apparatus

A head-up display device which can improve light irradiation efficiency toward an eye box, suppress the amount of brightness change for a display image affected by the movement of the viewpoint, and achieve desirable properties for the light distribution angle. An illumination optical system of the head-up display device has a light source for emitting a light beam, a lens array for generating a plurality of images of the light source by dividing the light beam, and a field lens for irradiating on a display member at a given angle the light beam emitted from the image of the light source, which is generated by the lens array, wherein the lens array is arranged such that the imaging surface of the light source generated by the lens array is located on the side of the principal point of the field lens with respect to a focal point on the side of an object of the field lens.

Growing community of inventors

Niigata, Japan

Kazuya Matsuura