Abstract: A virtual image display unit displays a virtual image for an object in a real scene ahead of the vehicle. A display control unit causes the virtual image to be displayed at a correction display position closer to the upper side in the vertical direction and/or a deep side in the depth direction when viewed from a viewer, than a standard display position at which the virtual image is normally displayed in association with the object in the real scene ahead of a host vehicle, in accordance with the relative speed or the relative distance between the host vehicle and the object in the real scene.

Abstract: Provided is a display device which can quickly start displaying images while preventing deterioration of a display means. A display device is mounted on a conveyance, such as a vehicle, and causes the display light emitted by a display means to reflect off a reflecting member (such as a concave mirror) onto a translucent member (such as a windshield) so that the image displayed by the display light can be visually recognized. The display means comprises a drive control means (such as a control means and a drive means) which moves the reflecting member between a first position (such as a displayable position) where it is possible to visually identify the image and a second position (such as a park position) where it is more difficult to visually identify the image than in the first position.

Abstract: Provided is a head up display device with which it is possible to adjust the projection location of display light depending on the height of the observer's point of view, without moving the virtual image in the vertical direction. This head up display device is provided with: a case which retains a display and a concave mirror in a prescribed positional relationship; a first driving means which rotates the concave mirror; a second driving means which moves the case frontward and rearward; and a control means which operates the first and second drive means in accordance with information about the viewpoint position of the observer, and adjusts the projection location of display light (L) on front glass depending on the height of the observer's point of view.

Abstract: Provided are a drive device and drive method for a vacuum fluorescent display that can suppress brightness variations in display images and improve display quality. A drive device for a vacuum fluorescent display is provided with a positive electrode unit in which a plurality of positive electrodes to which a phosphor is applied are disposed in a matrix shape and a negative electrode filament that discharges electrons toward the positive electrode unit. The device is provided with: a first magnetic field generating means that generates a first magnetic field perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and that can periodically switch polarity; and a second magnetic field generating means that generates a second magnetic field that is perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and crosses the first magnetic field and that can periodically switch polarity.

Abstract: Positional error (erroneous display) of a virtual image displayed in correspondence to a specific object in a scenery outside a vehicle is suppressed so as to enable a viewer to recognize information without a sense of discomfort. A forward information acquisition unit estimates the position of a specific object outside a vehicle, and a first display means generates an information picture about the specific object. A picture position adjustment means adjusts the position at which the information picture is projected in accordance with the position of the specific object estimated by the forward information acquisition unit. A behavior detection means detects a behavior of the vehicle, and the picture position adjustment means corrects the position at which the information picture is projected on the basis of the vehicle behavior detected by the behavior detection means.

Abstract: Provided is a head up display device with which it is possible to adjust the projection location of display light depending on the height of the observer's point of view, without moving the virtual image in the vertical direction. This head up display device is provided with: a case which retains a display and a concave mirror in a prescribed positional relationship; a first driving means which rotates the concave mirror; a second driving means which moves the case frontward and rearward; and a control means which operates the first and second drive means in accordance with information about the viewpoint position of the observer, and adjusts the projection location of display light (L) on front glass depending on the height of the observer's point of view.

Abstract: A display device compresses light-emitting display of modifiable display luminance; a light sensor for detecting the surrounding brightness; and a control for adjusting the display brightness of the light-emitting display in response to a brightness value based on detected results of the brightness sensor. If absolute value of the difference between current and previously determined brightness values is less than a prescribed threshold value, the control determines that there is no change in brightness otherwise the central determines that there has been a change in brightness. Upon a determination of a predetermined number of times that a brightness change has occurred, the display luminance is adjusted in response to the current brightness value.

Abstract: Provided is a head-up display device that can detect background brightness with a simple constitution. A HUD device (1) is provided with: a display device (20) that outputs display light (L) that shows a display image; a combiner (50) that has a concave surface (50a) to which the display light (L) output by the display device (20) is incident, said combiner (50) concentrating the incident display light (L) so as to allow an observer (2) to see the display image from the concave surface (50a) side superimposed on a background from the front; and an optical sensor (31) that is positioned below the combiner (50) and detects the brightness of the light reaching that optical sensor (31). The combiner (50) has a light guide body (60) which is at the lower edge part thereof and is integrated with the combiner (50).

Abstract: Provided are a drive device and drive method for a vacuum fluorescent display that can suppress brightness variations in display images and improve display quality. A drive device for a vacuum fluorescent display is provided with a positive electrode unit in which a plurality of positive electrodes to which a phosphor is applied are disposed in a matrix shape and a negative electrode filament that discharges electrons toward the positive electrode unit. The device is provided with: a first magnetic field generating means that generates a first magnetic field perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and that can periodically switch polarity; and a second magnetic field generating means that generates a second magnetic field that is perpendicular to the direction in which the positive electrode unit and the negative electrode filament face each other and crosses the first magnetic field and that can periodically switch polarity.

Abstract: A display device compresses light-emitting display of modifiable display luminance; a light sensor for detecting the surrounding brightness; and a control for adjusting the display brightness of the light-emitting display in response to a brightness value based on detected results of the brightness sensor. If absolute value of the difference between current and previously determined brightness values is less than a prescribed threshold value, the control determines that there is no change in brightness otherwise the central determines that there has been a change in brightness. Upon a determination of a predetermined a number of times that a brightness change has occurred, the display luminance is adjusted in response to the current brightness value.

Abstract: Provided is a head-up display device that can detect background brightness with a simple constitution. A HUD device (1) is provided with: a display device (20) that outputs display light (L) that shows a display image; a combiner (50) that has a concave surface (50a) to which the display light (L) output by the display device (20) is incident, said combiner (50) concentrating the incident display light (L) so as to allow an observer (2) to see the display image from the concave surface (50a) side superimposed on a background from the front; and an optical sensor (31) that is positioned below the combiner (50) and detects the brightness of the light reaching that optical sensor (31). The combiner (50) has a light guide body (60) which is at the lower edge part thereof and is integrated with the combiner (50).