Abstract: An image display system includes an image dividing unit for dividing an input image into a plurality of images based on varying distances from an image pickup position, and a plurality of display units, successively arranged at different distances from an observation position, for displaying the plurality of images divided in the image dividing unit, where the plurality of images divided in the image dividing unit are displayed on corresponding display units of the plurality of display units corresponding to the distances from the image pickup position.

Abstract: An augmented display includes an image display source and a silhouette display source. The image display source generates a virtual image to be perceived by a viewer. The silhouette display source occurs in the path of the background light. The silhouette display source generates a mask corresponding to the image content of the image display. The mask is a darkened area reducing or blocking background light. As the light from the virtual image is overlaid onto the background, there is less background light in the portion where the image appears.

Abstract: A method and apparatus for providing, in response to successive image signals and a control signal, the successive images at various apparent distances. The relationship between accommodation and convergence may be preserved. The images may have a highly detailed component which has its image content changed according to changes in the direction of a monitored one or more visual axes. The images may be provided stereoscopically.

Abstract: The invention relates to an instrument adapted for difficult conditions of use, such as a diver's computer or the like, said instrument comprising a computer (2) as well as displaying device (6) for displaying to a user at least the control and/or output information related to said computer (2). The display (7) of said displaying device (6) is arranged in a casing (1) in such a manner that said display (7) can be clearly read from two essentially different directions (A and B). A first side of a structurally transparent display (7) is read directly (direction A) from the top of said display (7), and the opposite side is read essentially from the opposite side (direction B) of said casing through a special optical assembly (12) so that a mirror image is read of an image observed from the back side of said display (7).

Abstract: An augmented display includes an image display source and a silhouette display source. The image display source generates a virtual image to be perceived by a viewer. The silhouette display source occurs in the path of the background light. The silhouette display source generates a mask corresponding to the image content of the image display. The mask is a darkened area reducing or blocking background light. As the light from the virtual image is overlaid onto the background, there is less background light in the portion where the image appears.

Abstract: Different viewing mechanisms are used for left and right eyes. One of the eyes is presented with an image from a single image source that occupies the entire field of view of the eye. The view presented by this first image source is a wide field of view with a relatively low resolution. A second image source presents a second view to the other eye of the user. The second view is a narrower-field-of-view, higher resolution depiction of the same view or scene as presented by the first image source. Additionally, the second image source includes a direct see-through path so that the user can view the real outside surroundings. The combination of low resolution, wide field of view in one eye combined with a high resolution, narrow field of view with see-through in the other eye allows the user to be presented with a computer-generated simulation view having both wide field of view with specific, high resolution at the viewer's visual center of interest.

Abstract: A rearview vision system for a vehicle includes an image capture device mounted at the rear of the vehicle and having a field of view directed rearwardly of the vehicle. A display system is viewable by a driver of the vehicle. The display system displays a rearward image output of the image capture device. A graphic overlay is superimposed on the rearward image when the gear actuator of the vehicle selects a reverse gear. The graphic overlay may include indicia of the anticipated path of travel of the vehicle. The graphic overlay may be disabled when the gear actuator of the vehicle is not in reverse gear.

Abstract: A visual display system and method for full and realistic stimulation of night vision goggles according to the present invention includes a display system for stimulating night vision goggles across a large dynamic range. The display system includes a high resolution head tracked area of interest display for a rear projection video display. The system time multiplexes the display of raster and calligraphic images in the area of interest. The system also includes a method of calligraphic light point projection that conserves power by using a head tracked slow speed high sensitivity electromagnetic deflection system to position an electron beam which is modulated in X-Y position in a calligraphic fashion by a high speed secondary yoke to create intense light point images for the area of interest display.

Abstract: A system including binoculars augmented with a computer-generated virtual display of navigation information (hereinafter referred to as “nav glasses”) and marine navigation systems employing such binoculars. The computer-generated display is superimposed on the real world image available to the user. Nav glasses also have the components needed to link them to a navigation system computer which is utilized to generate the see-through display of the navigation information. They are preferably equipped with sensors compass and an inclinometer for acquiring azimuth and inclination information needed by the navigation computer and a sensor for measuring any magnification of the field of view. The nav glasses can be employed to lock onto a moving target, which can then be tracked by onboard radar. The navigation system in which the nav glasses are incorporated also accept inputs from other sources such as a shipboard compass, a GPS, and other navigation aids; and a route planning system.

Abstract: An attitude direction indicator (ADI) display includes a horizon line that divides an upper colored portion, which represents the sky, from a lower colored portion, which represents the Earth. The ADI display includes indicia incorporated into the upper and/or lower portions for enhancing the operator's situational awareness of the vehicle. The indicia may be configured as a texturing of the colored portions and/or as a gradient color scheme associated with the colored portions. The texturing scheme or gradient color scheme may be utilized to convey viewable information related to the vehicle's altitude or position relative to a reference such as a runway. Furthermore, the texturing scheme or the gradient color scheme may be utilized to render a directional marker that indicates a direction toward the horizon line.

Abstract: A graphics display subsystem providing internally timed time-varying properties of display attributes is provided. The graphics display subsystem comprises a display device for displaying consecutive image frames of pixels having a variable display property, and a circuit for transferring image frames to the display device. One or more pixels are selected when a display attribute associated with the one or more pixels is set in an attribute table. The circuit varies, during a selected time interval, the display property of the selected pixels being displayed on the display device. In preferred embodiments, the variable display property is either a stereo image display, an image brightness control, or an image-blending control.

Abstract: A flat screen autostereoscopic display for bright wide angle stereoscopic images employs a flat screen on which are displayed a light pattern such as a plurality of regularly spaced, thin, vertical light emitting lines. The light lines are formed through use of electrically switchable materials such as liquid crystal or electrochromic materials. A transmissive electronic display, e.g., a liquid crystal display, is located in front of the light lines. The display and light lines are arranged in such a way that an observer sees the light emitting lines through one set of pixels with the left eye and the same lines through a different set of pixels through the right eye. Methods and apparatus for the simultaneous formation of a two-dimensional image and a three-dimensional image on such a transmissive electronic display, and for moving or dragging the display area of the three-dimensional image from one location to another on said display, are also disclosed.

Abstract: An optical device having a dioptric correction device comprises a reference image display unit which is placed in the optical path extending from an object image to the optical system. The reference image is used for dioptric correction. The left and right reference images are different and are displayed on the left and right reference image display units when dioptric correction is performed. The reference image display unit is placed at a predetermined position between the optical system and an image display unit. Since the reference image is positioned at the predetermined position, both of the image of the image display unit and the reference image may be seen clearly.

Abstract: A static diffracting grating display system provides a fixed image representing high digital content information. A plurality of physical diffracting features are fixed into the surface of a substrate. The diffracting features are positioned and oriented to selectively diffract or reflect a first incident beam of light which is then collected by a first display optical system. For color, preferably three light sources, red, green and blue, are used to form three incident beams of light. The period between adjacent ones of the diffracting features can be adjusted to appropriately form full-color image from the collected light. Preferably the diffracting features are formed by embossing a deformable substrate. Where the material of the deformable substrate is not reflective, a reflective coating is then applied. In some circumstances a protective overcoat applied over the reflective surface to obviate scratches or other damage to the diffracting features of the embossed surface.

Abstract: A three-dimensional digital map prepared by an satellite or the like is stored in a first memory as a wide-area information. Narrow-area information obtained by a laser radar is stored in a second memory. Obstacle information on obstacles, such as high-voltage power lines, high buildings and cranes, is stored in a third memory. These three information are read out to generate virtual images on a see-through type display mounted on a helmet of a pilot so that the virtual images is superimposed on the actual field of vision.

Abstract: A scanned beam tracking system is included in a virtual retinal display. An infrared light source generates light for scanning the viewer's environment in the direction the viewer is looking. A visible light source generates visible light which is scanned on a viewer's retina to generate a virtual image. A common scanning system is used to scan both the non-visible light and the visible light. The visible light is directed into the viewer's eye. The non-visible light is directed away from the viewer's eye into the environment. Infrared reflectors are positioned in the environment. When the infrared light from the virtual retinal display scans over a reflector the reflector directs the infrared light back toward the virtual retinal display. The current pixel of the scanning cycle when the infrared return light is detected corresponds to the position of the reflector.

Abstract: A method and apparatus for providing, in response to successive image signals and a control signal, the successive images at various apparent distances. The relationship between accommodation and convergence may be preserved. The images may have a highly detailed component which has its image content changed according to changes in the direction of a monitored one or more visual axes. The images may be provided stereoscopically.

Abstract: An image input apparatus is provided for picking up an image of an object placed on an original support with a camera and displaying the object image on a display device, the apparatus has a memory capable of storing a plurality of images picked up with the camera and a controller for controlling display of an image group containing a predetermined number of images stored in the memory.

Abstract: A video see through AR system capable of obtaining correct depth information with respect to each pixel representing a two-dimensional image is disclosed so that a portion of imagery which should appear in the background of a final picture may be properly hidden behind imagery which should appear in the foreground of the final picture. A photographing device is provided for obtaining a two-dimensional image of a real object field disposed in conjugate relationship with an observer's eyes. Also provided is a device for measuring distances with respect to each pixel to the real object to be measured. The measured distance is compared with the distance to virtual imagery with respect to each pixel and the pixel which represents the imagery disposed closer to the observer is selected for the formation of combined imagery, which is displayed on the screen of a display device.

Abstract: Using a mobile display having ordinary degree of resolution which is directly held by a user's hand or supported by a supporter, a three-dimensional virtual world is projected on a two-dimensional plane while varying the positional relations between the viewpoint and the image plane according to the position and orientation of the mobile display, and the resulting two-dimensional image is displayed on the mobile display and presented to the user.

Abstract: A head-mounted display includes an aperture mask between the eye and a viewfinder to mask the line artifacts resulting from visible edges of mechanisms, such as imagers, within the display. The aperture has a translucent area that matches the geometry of the edge desired to be masked. In an application where a high-resolution image is presented to one eye, centered within a lower-resolution image presented to the other eye, the aperture is positioned to mask the edges of the high-resolution image source. In an application where see-through is desired, the opaque area is sacrificed in favor of a partially transparent mask. The translucent area can be graduated so that a smooth transition area between the edges of the high-resolution display and the lower-resolution display is achieved.

Abstract: A shutter control mechanism for 3-D glasses includes a control circuit (28) associated with the glasses, the glasses having 3-D lenses (20) and (22). The control circuitry (28) receives commands from a control transmitter (16) in the form of synchronization pulses and command signals. The command signals are operable to vary the operating parameters of the lenses (20) and (22). Specifically, the duty cycle of the left lens (22) and the right lens (20) are varied such that they can either be at a fifty percent duty cycle, greater than a fifty percent duty cycle or less than a fifty percent duty cycle, wherein the amount of time that each of the lenses is on can be controlled for a given frame length. The command signals are also operable to provide demultiplexing of a plurality of multiplexed program channels. Specifically, the duty cycle of each shutter control frame is subdivided into transmissive left and right intervals corresponding to each program channel.

Abstract: A three-dimensional image display system, based on a novel depth concept referred to as Double-D-Depth, includes a first display device (3) and at least a second display device (4) which, viewed along the system axis (9-91), are offset with respect to each other and are each intended to partially display the same two-dimensional image of a scene, while parameters which are relevant to depth representation are included in the form of an additional dedicated intensity gradation in at least one of the displayed images, and all images, together with the axial distance (.quadrature.L) in between, evoke a depth effect with a viewer (10).

Abstract: A scanning display device directly scans a light source along at least one scanning path, rather than scanning a light beam emitted from such source along such scanning path. By scanning the light source a smaller, lighter weight scanner without a mirror can be used to achieve light source scanning along the desired scan path. A resonant cantilever translates one or more point sources (e.g., one for a monochromatic display; red, green and blue for an RGB display). The cantilever motion is driven by an electromagnetic drive circuit or by a piezoelectric drive actuator. The light source is one or more light emitting diode point sources, one or more a fiber optic point sources, or one or more light emitting polymer light sources.

Abstract: An image augmentation apparatus for superimposing an overlay image on a portion of a field of view of a user looking through the apparatus at a scene external to the apparatus. The apparatus includes a display screen for generating the overlay image. An optical system creates a virtual image of the overlay image which appears to the user as covering a portion of the field of view. The apparatus utilizes a transmission screen having a two-dimensional array of pixels to block portions of the image of the external scene. The pixels of the transmission screen are either set to a first state in which the pixels are transparent or a second state in which the pixels are opaque. The transmission screen is located such that a pixel set to the opaque state blocks the user from viewing a portion of the field of view of the external scene allowing the user to view only the virtual image in that portion of the field of view.

Abstract: A display system conveys vehicle guidance information in the peripheral field of view of the user by the movement of ambient symbology that is not representational of either symbols or physical objects, and does not require any optics for the purpose of representing the display within the focal range of the eye. The ambient symbology is presented outside the central 30 degrees of the forward field of view of the user, and appeals to the ambient or peripheral mode of processing visual information, in contrast to previous displays which have been designed for focal modes of visual processing.

Abstract: A head-mounted visual display apparatus which uses two or more two-dimensional display devices and which is compact, lightweight and enables an image which is clear as far as the periphery of the observation image field to be observed at a wide field angle and high resolution. The apparatus has a first two-dimensional display device (4) and a second two-dimensional display device (5). An ocular optical system (3) includes a first surface (11) having both reflecting and transmitting actions, a second surface (12) having at least reflecting action, and a third surface (13) having at least reflecting action. The first surface (11) is disposed to face an observer's eyeball (6). The second surface (12) is disposed to face the first surface (11). The third surface (13) is disposed to face the first surface (11) in a side-by-side relation to the second surface (12). Thus, images displayed by the first and second two-dimensional display devices (4 and 5) are led to the observer's eyeball (6).

Abstract: A wearable display device displays a sequence of words into the field of view of a person wearing the device in order to communicate information to the person, such as captions for hearing-impaired persons or translations of speech spoken by another person. Various embodiments of the device include an eyeglass frame configured to be worn by the person, a housing mounted to the eyeglass frame, including a circuit for receiving a signal containing the sequence of words, a display for displaying the sequence of words received by the circuit, a mirror mounted to reflect the displayed sequence of words downwardly through the housing, and a lens disposed in the path of the mirror to magnify the displayed sequence of words downwardly reflected by the mirror, and a partially reflective beamsplitter, mounted to the housing and extending downwardly over an eye of the person, for receiving the downwardly reflected sequence of words and projecting them into the field of view of the person.

Abstract: A glass unit such as a binocular or monocular in which an object to be observed is viewed under magnification is made to display a map image, whereby the observer's own position can be specified on the map image without an atlas being opened. Based on a self-position data input from a GPS unit (21), a CPU (31) transmits map image information near its own position from a topographic map database (23) to a CG buffer (39) by way of a memory (25). On the other hand, based on the self-position data, a mark or character indicative of its position on the map image is generated by a mark character generating unit (35) so as to be superimposed onto the map image from the CG buffer (39), whereby a composite image thus formed is displayed by an LCD within a housing (10) so as to be viewed within the visual field of the glass unit.

Abstract: A liquid crystal display device having a liquid crystal layer driven by a data signal which comprises a TFT for selecting the data signal; and a ferroelectric layer of which a polarized state is controlled corresponding to the data signal selected by the TFT, and the liquid crystal layer responds to the polarized state of the ferroelectric layer, and the liquid crystal layer is driven when the liquid crystal layer responds to the polarized state of the ferroelectric layer. Since the ferroelectric layer can keep stable the polarized state for a long duration, a driving frequency can be reduced substantially to a substantially DC level, and power consumption is reduced to a great extent. In addition, the ferroelectric layer formed in a pixel divides the liquid crystal corresponding to the polarized domains of the ferroelectric layer, thereby showing an analogous grayscale image.

Abstract: An apparatus and method to dynamically shape the projected energy profile of an electron beam and the energy distribution of an electron beam of a cathode ray tube to provide a single cathode ray tube the ability to display multiple image formats of varying resolutions, brightnesses and aspect ratios. In one embodiment, the invention contemplates the introduction of a shaping lens along the path of the electron beam comprising at least three electrodes. Voltages are selectively applied to the electrodes to dynamically and selectively vary the projected energy profile of an electron beam in a plane perpendicular to the longitudinal axis of the cathode ray tube.

Abstract: An audio reproducing unit 2 has a audio signal processor 5 responsive to results of detection by a turning angular velocity sensor 16 for carrying out calculations for localizing the input audio outside the head of a wearer of a head attachment unit 15, for preventing the sound image orientation from following head turning movement and for setting the sound image orientation in a pre-set direction in the viewing/hearing environment of the wearer. The image reproducing unit 10 has an image signal processor 12 for setting the input image in a pre-set orientation in the viewing/hearing environment of the wearer responsive to the results of detection by the turning angular velocity sensor 16.

Abstract: A virtual reality visual display system comprises a display device viewable by a user and a remote bounded-display-surface and stylus for entering data and graphics. The display device and remote bounded-display-surface each are equipped with sources of energy and communicate therebetween with radio or microwave radiation. The remote bounded-display-surface location and orientation in space is continuously transmitted to the display device whereby the virtual image of the bounded-display-surface is generated in the display device in mimicry of the actual surface. Application of the stylus to the bounded-display-surface causes the stylus tip location in space to likewise be transmitted to the display device and displayed as a virtual image. Thus, the bounded-display-surface can be "written-on" with the stylus regardless of orientation and a virtual representation complete with proper orientation displayed in real time on the display device.

Abstract: A method of producing a three-dimensional image comprises the steps of: sequentially producing images of depth plane contours of an object by tracing the images representative of the contours in each plane; and projecting the contour images onto a moving screen to display the images at an appropriate point in space. The rate of production of the contour images is more rapid than can be discerned by the human eye such that persistence of vision creates an apparently solid three-dimensional image of the object.

Abstract: This invention relates to an image display method, which includes the steps mainly characterized by allowing the observer to stereoscopically view the three-dimensional partial image by guiding a light beam coming from the three-dimensional partial image to a predetermined position via a partial parallax barrier, which is formed by light directivity controlling means, arranged to oppose the image displaying means, by alternately arranging stripe-shaped light-transmitting portions and light-shielding portions on an area corresponding to the three-dimensional partial image; and controlling, using light amount adjusting means, the brightness levels of the partial images to be observed by the observer in correspondence with the view point numbers of the partial images.

Abstract: An image-displaying apparatus that is provided with a display section which is constituted of a plurality of pixels disposed in the form of a matrix and which is capable of displaying images that are different depending on viewing angles from which they are viewed. This arrangement makes it possible to select desired images by changing the viewing angles from which the display section is viewed. This eliminates the necessity of having to wear conventional glasses with a shutter and their inherent inconveniences. Further, this apparatus is suitable for public use as well as for private use, even when only one apparatus is used.

Abstract: An apparatus and method for generating a stereo image that is perceived as a three-dimensional image when viewed through polarizing spectacles having orthogonally polarized lenses. The apparatus includes an illuminator that generates light of variable intensity, a modulator that generates an illumination control signal for controlling the intensity of light emitted by the illuminator, a polarizer for polarizing the light generated by the illuminator, and a distributor for changing the plane of polarization of the polarized light.

Abstract: An augmented display includes an image display source and a silhouette display source. The image display source generates a virtual image to be perceived by a viewer. The silhouette display source occurs in the path of the background light. The silhouette display source generates a mask corresponding to the image content of the image display. The mask is a darkened area reducing or blocking background light. As the light from the virtual image is overlaid onto the background, there is less background light in the portion where the image appears.

Abstract: An electro-luminescent display apparatus which is capable of displaying two kinds of images is disclosed. The apparatus has a front and a rear electro-luminescent unit therein, and the green light emitted from the front unit directly displays the real image which looks close to a viewer while the orange light emitted from the rear unit is reflected by a reflector disposed at the back of the apparatus and displays a virtual image which looks far from the viewer. In order to reflect the light emitted backward from the front unit and the light emitted forward from the rear unit, reflecting electrodes are provided on the rear surface of the front unit or a reflecting film is disposed in the space between the front and the rear units.

Abstract: An autostereoscopic display system including: I) image signal electronics; II) a first projector including: A) a first light source 33; B) a first spatial light modulator 35 optically connected to said first light source and electrically connected to said image signal electronics; and C) a first image delivery system optically connected to said first spatial light modulator; III) a second projector connected to said first projector, said second projector including: A) a second light source 34; B) a second spatial light modulator 36 optically connected to said second light source and electrically connected to said image signal electronics; and C) a second image delivery system optically connected to said second spatial light modulator; IV) a fan-out multiplexer 39 optically connected to both said first image delivery system and said second image delivery system, said fan-out multiplexer being characterized by a viewing zone period and a viewing region period; and V) a binary head tracker 40 electrically connec

Abstract: Disclosed is an active-matrix color liquid crystal display (LCD) device capable of reducing loads of peripheral circuits for horizontal scanning control. Six separate active-matrix regions are arranged and integrated on a glass substrate. Two horizontal scan controller circuits are provided such that one acts to a common horizontal scan controller for the left-hand column of three, first to third active-regions, whereas the other is a common controller for the right-hand column of the remaining, fourth to sixth regions. These horizontal scan controllers are designed to operate at different timing schemes from each other causing RGB images formed in the first to third regions and those in the fourth to sixth regions to be superimposed together for projection. With such an arrangement, the horizontal scanning frequency required for one horizontal scan controller can be decreased at half that of a projection image displayable on a viewing screen associated with the LCD device.

Abstract: The present invention provides a visual display including a high resolution miniature display compatible with VLSI technology and an optical system such as an optical magnifier used to enlarge the images display on the miniature display to be visible to the naked eye. The miniature display includes a VLSI backplane having an array of display elements monolithically formed with its driving circuit on a single crystalline semiconductor. Signal processing circuit or a microprocessor used to process image signals for the display may also be formed monolithically with the array and its driving circuit. The array may be designed using a silicon software compiler program to have randomly displaced elements or super-pixels for reducing image aliasing. The array may also be designed to have display elements positioned and scaled to compensate for the optical distortion introduced by the magnifier.

Abstract: A multi-eye type image display apparatus comprises a right-eye image displaying device for emitting light to display an image for the right eye, a left-eye image displaying device for emitting light to display an image for the left eye, an optical device for guiding a light beam from the right-eye image displaying device to the pupil of the right eye of an observer and guiding a light beam from the left-eye image displaying device to the pupil of the left eye of the observer, so that the observer can fuse virtual images of the images with each other, and an adjusting device for adjusting a characteristic of each virtual image in a region including a boundary where the virtual image for the right eye and the virtual image for the left eye overlap.

Abstract: The present invention is generally concerned with electronic vision devices and methods, and is specifically concerned with image augmentation in combination with navigation, position, and attitude devices. In the simplest form, devices of the invention can be envisioned to include six major components: A 1) camera to collect optical information about a real scene and present that information as an electronic signal to; a 2) computer processor; a 3) device to measure the position of the camera; and a 4) device to measure the attitude of the camera (direction of the optic axis), thus uniquely identifying the scene being viewed, and thus identifying a location in; a 5) data base where information associated with various scenes is stored, the computer processor combines the data from the camera and the data base and perfects a single image to be presented at; a 6) display whose image is continuously aligned to the real scene as it is viewed by the user.

Abstract: A Head Mounted Display (HMD) having both single viewing capability and group viewing capability is provided. The eyepiece of the HMD can be either converted to a group viewing projector or can be replaced or interchangeable with a group viewing unit.

Abstract: A wide view angle display apparatus includes a pair of display devices each including a display for displaying an image, a high resolution display for superimposing a high resolution image at a center portion of the displayed image and eye movement detection means for ascertaining the view point of the user's eye, a support/drive means associated with each display device for supporting the display device and moving it in accordance with a signal from the eye movement detection means to keep the center of the displayed image coincident with the view point, a video signal generating means associated with each display devices for sending a view point video signal to the display based on a signal from the eye movement detection means, and a high resolution video signal generating means associated with each display device for sending a high resolution video signal to the high resolution display.

Abstract: A head mounted display system includes a frame that can be worn on a user's head wherein the frame supports a display and an optical system that projects an enlarged image of video information depicted on the display at a distance from the user. Also mounted on the frame so as to form an integral part of the head mounted display system is a barcode sensor for detecting one or more barcodes in the field of view thereof. A processor of the head mounted display system decodes barcodes detected by the sensor and determines the location of detected barcodes within the sensor's field of view. The processor utilizes the decoded barcode values and locations to control the video information depicted on the display for head tracking purposes or the like. The head mounted display system of the present invention has applications in both augmented field of view and virtual reality applications.

Abstract: A head-mounted display for displaying an image that matches a viewer's head movement has a head tracker for detecting the viewer's head movement, an eye tracker for detecting the viewer's eye movement, and an adaptive filter for adaptively filtering the output of the head tracker in accordance with the output of the head tracker and the output of the eye tracker, and when tracker, and when the viewer is watching a particular object in the displayed image, the adaptive filter is set as a low-pass filter, and this and the output gain of the head tracker is lowered; in other cases, the adaptive filter is set as an all-pass filter, and this prevents minute shaking of the head from being reflected on the displayed image, while retaining image display response to head motion, and furthermore, this serves to keep the particular object from being shifted outside the field of view.

Abstract: An information display device comprises a housing installed in an instrument panel of a motor vehicle. The housing has a window opening facing toward the vehicle cabin. A first display device is installed in the housing and has a screen on which a first image is displayed. A second display device is installed in the housing and has a screen on which a second image is displayed. A half mirror is installed and inclined in the housing in a manner to cover the screens of both the first and second display devices, so that the image forming light beams from the screens are reflected backward by the half mirror. A concave mirror is installed in the housing behind the half mirror, so that the image forming light beams from the half mirror are reflected forward by the concave mirror.

Abstract: An image display apparatus designed so that the observer can view the image of an image display device without the need of manually adjusting the positional relationship between the observer's eyeball and a bundle of rays from the image display device which is to be projected into the eyeball. A positional relationship detecting section (46) observes the pupil of an observer's eyeball (44) and its vicinities, and detects where a bundle of rays from an LCD (42) is being projected. If it is detected that the ray bundle is not coincident with the pupil, motors (52a and 52b) are driven to move a first support (50a) and a second support (50b), which support the LCD (42), a backlight (43), and an ocular lens (45), so that the ray bundle passes through the pupil.