Maxell, Ltd.

Hitachi Industry & Control Solutions, Ltd.

Toshinori Sugiyama

Koji Hirata

Yasuhiko Kunii

Masahiko Yatsu

Kazuomi Kaneko

Masahiro Kishigami

Koji Fujita

Akio Misawa

Hiroyuki Kajikawa

Takuya Shimizu

Chohei Ono

Tomoki Yamamoto

Eiji Takagi

Hiroyuki Nakamura

Hiroshi Chiba

Nozomu Shimoda

Yuji Tsuchiya

Masayoshi Takori

Megumi Kurachi

Nobuyuki Kaku

Go Shimizu

Shigeki Hoshino

Ryuya Kawaji

Noriaki Harada

Eiji Kawawa

Tatsuya Nakazawa

Hiroaki Takahashi

Yuji Fujita

Souta Sato

Nagayasu Tsutsumi

Nobutaka Amada

Keisuke Sawada

Toshimasa Nagai

Shuji Kato

Yuki Nagano

Takumi Nakada

Hidemi Yamada

Kouichi Kajiwara

Michiaki Abe

Information related to a vehicle can be displayed by projecting an image based on the information on a road surface or the like. An image projection apparatus that projects an image includes: an acquisition unit that acquires information to be displayed; and an image projection unit that projects the image based on the information to be displayed acquired by the acquisition unit.

Image projection apparatus

An information display apparatus that displays image information on a vehicle includes a HUD apparatus projecting a large-scale virtual image onto a distant position and serving as a first information display apparatus arranged between a windshield glass of the vehicle and an instrument panel, and effectively displays a plurality of pieces of the image information by making coordination with a second information display apparatus close to the windshield glass, the second information display apparatus causing a transparent dispersion sheet in the windshield glass to directly reflect a screen of a large-scale high-resolution image display panel so that the screen is observed by the driver.

In-vehicle information display system and information display apparatus

A light source apparatus and the like capable of improving the manufacturing yield are provided. The light source apparatus includes a light source, a collimator which is arranged to face the light source and includes a reflection portion for adjusting a focal length of light incident from the light source to the collimator, and a light guide arranged on an emission side of the collimator. The reflection portion of the collimator includes a normal focus area in which the light emitted from the light source and incident to the collimator is converted into substantially parallel light, a long focus area in which the light incident to the collimator is converted into slightly divergent light in comparison with the substantially parallel light, and a short focus area in which the light incident to the collimator is converted into slightly convergent light in comparison with the substantially parallel light.

Vehicle

A compact and portable air floating video display apparatus includes a housing that can be installed in a bottle holder in a vehicle. A video display apparatus, a beam splitter, a retroreflector, a retardation plate, and a plane mirror are provided in the housing. In the air floating video display apparatus, a video light of a specific polarized wave from the video display apparatus is reflected by the plane mirror, transmitted through the beam splitter, and subjected to polarization conversion by being reflected by the retroreflector and passing through the retardation plate. Then, the video light is reflected by the beam splitter and transmitted through the window, thereby displaying an air floating video outside the apparatus.

Air floating video display apparatus

A vehicle comprising a state detection device the detects a behavior and peripheral environmental information of the vehicle, an optical device that displays at least a plurality of condensing marks which are a pattern indicating at least a travelling direction of the vehicle on a road surface, and a lamp controller that controls lighting or blinking of the optical device. The lamp controller acquires a detection signal, lights or blinks the optical device based on the detection signal, and combines a plurality of linear partial irradiation images into the plurality of condensing marks. The optical device arranges and displays the plurality of condensing marks side by side on a road where the vehicle enters in the traveling direction, and displays the plurality of condensing marks in at least two different colors that appear to overlap each other to a viewer when the viewer is a first distance from the vehicle.

Optical device and direction display device

The information display apparatus has a housing with an opening and a transparent cover formed on the opening, the housing includes image-light generating means configured to generate image light that displays the image information and an optical system configured to allow a driver of the vehicle to recognize image information based on the image light from the image-light generating means as a virtual image in front of the windshield. When S-polarized light on the windshield is assumed to be a first polarized wave while polarized light that orthogonally crosses the S-polarized light in a polarizing direction is assumed to be a second polarized wave, the image-light generating means is configured to generate the image light made of the first polarized wave, and a transmittance/reflectance control means blocks a part of the first polarized wave and the second polarized wave of incident external light entering the housing from the opening.

A display device includes a backlight, a display element, a plate for holding at least a portion of an emission surface, from which an image light is emitted, provided on the display element, and a heat dissipation portion that dissipates heat generated from the display element. The display element is connected to the heat dissipation portion via the plate.

Display device

In an information display system that allows an observer to visually recognize image information displayed on an image display apparatus by superimposing the image on an external scenery through a window glass and a combiner, the system includes a light source apparatus that supplies light having a specific polarization direction at a narrow divergence angle to the image display apparatus, a reflection position of the image is changed by arranging a position and an angle of the image display apparatus with respect to the window glass so that the position and the angle change while a monitoring angle of the image visually recognized by the observer is constant, and a virtual image display distance of the image visually recognized by the observer and a size of the image of the virtual image can be changed by the arrangement state in the vehicle.

Light source apparatus, and information display system and head-up display apparatus using the same

The information display apparatus configured to display video information of a virtual image on a reflecting surface of conveyance includes: a display configured to display the video information; and a virtual image optical system configured to display a virtual image at a front of the conveyance by reflecting light emitted from the display by means of the reflecting surface. The virtual image optical system includes a concave mirror and an optical element. The optical element is arranged between the display and the concave mirror, and is configured to correct distortion of the virtual image obtained so as to correspond to a viewpoint position of a driver on a basis of a shape of the concave mirror and a shape of the optical element. The information display apparatus further includes a virtual image double image conversion reducer configured to reduce double image conversion of the virtual image.

Information display apparatus

An information display system configured to unidirectionally display an image to inside or outside of a space via a transparent projected member provided in the space includes an image projection apparatus arranged inside the space and configured to generate and project image light by modulating a light flux from a light source, a transparent sheet provided on an inner surface of a display region set on a part of the projected member, and a light direction changing panel configured to change a direction of the image light from the image projection apparatus toward the transparent sheet of the display region, and the transparent sheet includes a retardation plate, an absorption type polarization plate that absorbs a specific polarized wave, and a transparent diffusion sheet material having a light diffusion function, and projects the image light whose direction has been changed by the light direction changing unit to the inside or the outside of the space.

Information display system and vehicle information display system using the same

A light source device which is miniaturized, can be manufactured at low cost, and is suitable as an illumination light source of a display device of an electronic device such as an HUD and an aerial floating image display apparatus is provided. The light source device includes: a light source configured to generate white light by irradiating a phosphor with light emitted from a solid-state light source; a collimating optical system () configured to convert a divergent light flux of the white light emitted from the light source into parallel light; a light guide configured to cause the light emitted from the collimating optical system () to be incident as incident light and emit the incident light in a direction different from an incident direction; and a filter configured to reflect light in a blue region of the parallel light to irradiate the phosphor.

Light source device and electronic device

A head-up display apparatus includes a display panel configured to display an image, and a reflecting mirror configured to reflect light from the display panel. An optical distance between the reflecting mirror and the display panel is changed to continuously change a display position of a virtual image from a distant place to an adjacent position such that a virtual image obtained by being reflected at an upper portion of a windshield is formed farther than a virtual image obtained by being reflected at a lower portion of the windshield when viewed from a viewpoint position of a driver.

An object of the present invention is to provide a head-up display apparatus further reduced in size, the head-up display apparatus having: an image display apparatus including a light source and a display element; and a virtual image optical system in which light emitted from the image display apparatus is reflected by a windshield or a combiner of the vehicle so that a virtual image is displayed in front of the vehicle, wherein the virtual image optical system has a concave mirror and a distortion correcting lens, and the distortion correcting lens is disposed between the image display apparatus and the concave mirror, the concave mirror is disposed in a housing including an outer case along a shape of an effective light path area of the image light from the image display apparatus, and the image display apparatus is attached to part of an outer periphery of the housing.

Light source apparatus and head up display apparatus

Provided is a head-up display apparatus capable of preventing damage due to sunlight and ensuring user convenience. A reflection mirror Mreflects an image created by a display panel and projects it onto a display region. A solar radiation sensor detects a sunlight intensity when a position of sun exists within a predetermined detection range. A blocking mechanism forms a projected light path of an image between the display region and the display panel when being turned off, and blocks the projected light path of the image and an incident light path of the sunlight which is direction opposite thereto when being turned on. A protection processor controls ON/OFF of the blocking mechanism based on an estimated temperature of the display panel, which is estimated by using a sunlight intensity from the solar radiation sensor, luminance of a light source, and an ambient temperature.

Growing community of inventors

Kyoto, Japan

Toshinori Sugiyama