Abstract: A vehicular display apparatus includes a light source unit that emits laser light; a first optical system that uses a first projection surface, onto which a display image is projected, to make a virtual image discernible; a second optical system that uses a second projection surface, onto which the display image is projected, to make a real image discernible; a controller; and a switching mechanism that switch the two optical systems. The distance between the light source unit and first projection surface is smaller than the distance between the light source unit and second projection surface.

Abstract: A vehicular display apparatus includes a light source unit that emits laser light; a first optical system that uses a first projection surface, onto which a display image is projected, to make a virtual image discernible; a second optical system that uses a second projection surface, onto which the display image is projected, to make a real image discernible; a controller; and a switching mechanism that switch the two optical systems. The distance between the light source unit and first projection surface is smaller than the distance between the light source unit and second projection surface.

Abstract: A headup display device controls a brightness of an image according to a present illumination in an environment of a vehicle and projects the image to a front windshield of the vehicle to indicate the image as a virtual image in an interior of the vehicle. An illumination determination unit determines a present illumination by multiplying an increasing rate by an interior illumination in the interior of the vehicle when being in a light-adapted state, in which the interior of the vehicle is lighter than the exterior of the vehicle. The illumination determination unit determines the present illumination by multiplying a decreasing rate by an exterior illumination in the exterior of the vehicle when being in a dark-adapted state, in which the interior of the vehicle is darker than the exterior of the vehicle. A brightness control unit controls the brightness to correspond to the determined present illumination.

Abstract: A head-up display unit produces a first image representing first information and a second image representing second information floating in space by projecting light, emitted from a light source, toward a transparent projection member. The head-up display unit includes a first image generator and a second image generator. The first image generator has a first light transmission portion corresponding to the first image and generates a first image light, for producing the first image, by causing the light emitted from the light source to be transmitted through the first light transmission portion in a first direction. The second image generator is arranged parallel to the first image generator in a second direction crossing the first direction. The second image generator generates and outputs a second image light, for producing the second image, in a third direction along the first direction.

Abstract: A head-up display apparatus includes an image output device and an optical system. The optical system includes a first and second optical members. The first optical member receives the image from the image output device. The second optical member receives the image from the first optical member and projects the image to a vehicle windshield. The second optical member has a position changer that rotates the second optical member to change an optical path thereof relative to the windshield to change a projection position of the image on the windshield. The first optical member has an adjuster that changes a position of the first optical member in order to adjust an optical path thereof relative to the second optical member to adjust the optical path of the second optical member.

Abstract: A headup display device controls a brightness of an image according to a present illumination in an environment of a vehicle and projects the image to a front windshield of the vehicle to indicate the image as a virtual image in an interior of the vehicle. An illumination determination unit determines a present illumination by multiplying an increasing rate by an interior illumination in the interior of the vehicle when being in a light-adapted state, in which the interior of the vehicle is lighter than the exterior of the vehicle. The illumination determination unit determines the present illumination by multiplying a decreasing rate by an exterior illumination in the exterior of the vehicle when being in a dark-adapted state, in which the interior of the vehicle is darker than the exterior of the vehicle. A brightness control unit controls the brightness to correspond to the determined present illumination.

Abstract: A head-up display apparatus includes an image display device for projecting at least two separate images, a mirror for reflecting the images, and an image screen for receiving and displaying the images. Each of the images expansively travels along optical path from the image display device to the image screen on a front windshield of a vehicle. Lengths of the optical paths of the at least two images from the image display device to the image screens are respectively different.

Abstract: A display device includes a liquid crystal display (LCD) panel, a light emitting diode (LED), and a reflector. The reflector having the first, the second, and the third reflecting surfaces is arranged in the rear of an LCD screen of the LCD panel. The first reflecting surface is arranged parallel to the LCD screen. The light source is arranged between the LCD screen and the LED such that a main axis of light emitted from the LED is parallel to the LCD screen. The second reflecting surface is arranged such that the light is reflected off the second reflecting surface toward the LCD screen. The third reflecting surface is arranged such that the light is reflected off the third reflecting surface toward the first reflecting surface and transmitted to the LCD screen. With this configuration, the amount of the light is less likely to be reduced when the light passes through a light guiding member and the brightness of the LCD screen is increased.

Abstract: A head-up display apparatus includes an image display device for projecting at least two separate images, a mirror for reflecting the images, and an image screen for receiving and displaying the images. Each of the images expansively travels along optical path from the image display device to the image screen on a front windshield of a vehicle. Lengths of the optical paths of the at least two images from the image display device to the image screens are respectively different.

Abstract: A display device includes a liquid crystal display (LCD) panel, a light emitting diode (LED), and a reflector. The reflector having the first, the second, and the third reflecting surfaces is arranged in the rear of an LCD screen of the LCD panel. The first reflecting surface is arranged parallel to the LCD screen. The light source is arranged between the LCD screen and the LED such that a main axis of light emitted from the LED is parallel to the LCD screen. The second reflecting surface is arranged such that the light is reflected off the second reflecting surface toward the LCD screen. The third reflecting surface is arranged such that the light is reflected off the third reflecting surface toward the first reflecting surface and transmitted to the LCD screen. With this configuration, the amount of the light is less likely to be reduced when the light passes through a light guiding member and the brightness of the LCD screen is increased.

Abstract: A light source located in a rear part of an LCD panel has a first LED group and a second LED group. LEDs in the second LED group has higher directivity than LEDs in the first LED group and located above the LEDs in the second LED group. The LCD panel receives light emitted from the LEDs through a diffusion plate, and displays high priority information on an entire display surface of the LCD panel. It also receives light emitted from the LEDs, and displays low priority information on a partial display surface.

Abstract: A light source of a liquid crystal panel employed in a head up display for a vehicle has an embedded filament for emitting a light with high luminance and another embedded filament for emitting a light with low luminance. The embedded filament for emitting a light with low luminance is used for a first luminance range. On the other hand, the embedded filament for emitting a light with high luminance is used for a second luminance range. In addition, both the elements may be used at the same time for emitting a light with maximum luminance of the first range and the second range.

Abstract: A light source located in a rear part of an LCD panel has a first LED group and a second LED group. LEDs in the second LED group has higher directivity than LEDs in the first LED group and located above the LEDs in the second LED group. The LCD panel receives light emitted from the LEDs through a diffusion plate, and displays high priority information on an entire display surface of the LCD panel. It also receives light emitted from the LEDs, and displays low priority information on a partial display surface.

Abstract: A light source of a liquid crystal panel employed in a head up display for a vehicle has an embedded filament for emitting a light with high luminance and another embedded filament for emitting a light with low luminance. The embedded filament for emitting a light with low luminance is used for a first luminance range. On the other hand, the embedded filament for emitting a light with high luminance is used for a second luminance range. In addition, both the elements may be used at the same time for emitting a light with maximum luminance of the first range and the second range.

Abstract: A head-up display device includes a display unit for emitting display light corresponding to images of control switches, and an optical reflector for reflecting display light. A windshield or a combiner installed on the windshield reflects the image before creating a display image in front of the windshield. The head-up display device has touch sensors on control switches mounted inside a vehicle. When these touch sensors detect user contact on a control switch, the display unit displays the touched control switch and related switches together with highlighting the same control switch in comparison with its related switches.

Abstract: All components and parts of a head-up displaying device are formed in a unit and secured to a dashboard or a rear panel of a vehicle. The displaying device has a case composed of a base member, a bottom plate and a cover. The base member is secured to the dashboard or the rear panel and forms a turntable with the bottom plate. An image projection unit, a control unit and a reflecting member are housed in the case, and a foldable flat combiner is pivotally secured to the cover of the case. A shade member is formed on the cover to prevent the image projection unit from coming into the driver's line of sight. The combiner is held by a holder which forms a hinge using clips secured to the case and shafts formed on the sides of the holder so that the inclination angle of the combiner may be adjusted.