Patent application number | Description | Published |
20080239424 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide ( | 10-02-2008 |
20090040580 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY - There is provided an optical device including an optical waveguide upon which a group of parallel light beams different in traveling direction from each other are incident and from which the group of parallel light beams go out after propagated by repeated total reflection through it. The optical waveguide includes a first reflection-type volume hologram grating, and a second reflection-type volume hologram grating. The pitches of interference fringes on the hologram surfaces of the first and second reflection-type volume hologram gratings are equal to each other. In at least the second reflection-type volume hologram grating, the angle formed between the interference fringes and hologram surfaces are varied continuously or stepwise within the hologram in relation to the main incident light beam so as to meet the Bragg condition. Therefore, it is possible to reduce the unevenness of color and brightness due to angles of view. | 02-12-2009 |
20090141324 | IMAGE DISPLAY DEVICE - An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. | 06-04-2009 |
20090141501 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device having pixels; a collimating optical system collimating light from the image forming device; and an optical device receiving, guiding, and outputting the collimated light as directional rays in different directions. The optical device includes a light-guiding plate; a first optical member reflecting or diffracting the light so as to totally reflect the light inside the light-guiding plate; and a second optical member causing the propagated light to emerge from the light-guiding plate. When a light ray emitted from a pixel located farthest from the center of the image forming device and a light ray emitted from a pixel located at the center of the image forming device pass through a front nodal point of the collimating optical system and are respectively incident on the collimating optical system and the light-guiding plate at angles θ | 06-04-2009 |
20090303212 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 12-10-2009 |
20100039796 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device, a collimating optical system, and an optical device. The optical device includes a light guide plate, a first deflecting member that deflects light incident on the light guide plate, and a second deflecting member that deflects the light, which propagates in the light guide plate by total reflection, a plurality of times. The first and second deflecting members are provided in the light guide plate. Light having one wavelength emitted from at least one pixel satisfies the following condition: | 02-18-2010 |
20100046070 | HEAD-MOUNTED DISPLAY - A head-mounted display includes a frame shaped like glasses to be worn on the head of an observer, two image display apparatuses respectively including image generating devices to be placed outside the eyes of the observer, and light guide devices attached to the image generating devices and provided closer to the center of the face of the observer than the image generating devices as a whole, light emitted from the image generating device entering the light guide devices, and being guided and emitted from the light guide devices toward the eyes of the observer, and a coupling member configured to couple the image generating devices and attached to a center portion of the frame between the eyes of the observer. | 02-25-2010 |
20100103078 | HEAD-MOUNTED DISPLAY APPARATUS - A head-mounted display apparatus includes an image display device, a wearing device with which the image display device is worn on a head of an observer, and an attachment member with which the image display device is attached to the wearing device. The attachment member is capable of adjusting a position of the image display device relative to the wearing device independently in a first direction and in a second direction, the first direction being defined by a virtual line connecting centers of eyes of the observer, the second direction being perpendicular to the first direction and extending vertically with respect to the observer. | 04-29-2010 |
20100157433 | HEAD MOUNTED DISPLAY - Disclosed herein is a head mounted display including: an eyeglasses frame-like frame to be mounted onto an observer's head; and two image display devices, each of the image display devices including an image generating device, and light guide means which is mounted to the image generating device, which as a whole is located on the side of the center of an observer's face relative to the image generating device, on which beams emitted from the image generating device are incident, through which the beams are guided, and from which the beams are emitted toward an observer's pupil. | 06-24-2010 |
20100220295 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide ( | 09-02-2010 |
20100321409 | HEAD MOUNTED DISPLAY, AND IMAGE DISPLAYING METHOD IN HEAD MOUNTED DISPLAY - Disclosed herein is A head mounted display including: (A) an eyeglasses frame-like frame to be mounted to an observer's head; (B) an image display device; (C) an image sensing device mounted to the frame; and (D) a correction section, wherein the image display device includes (B-1) an image generating device, and (B-2) see-through type light guide section which is mounted to the image generating device, on which beams emitted from the image generating device are incident, through which the beams are guided, and from which the beams are emitted toward an observer's pupil. | 12-23-2010 |
20110032706 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device having pixels; a collimating optical system collimating light from the image forming device; and an optical device receiving, guiding, and outputting the collimated light as directional rays in different directions. The optical device includes a light-guiding plate; a first optical member reflecting or diffracting the light so as to totally reflect the light inside the light-guiding plate; and a second optical member causing the propagated light to emerge from the light-guiding plate. When a light ray emitted from a pixel located farthest from the center of the image forming device and a light ray emitted from a pixel located at the center of the image forming device pass through a front nodal point of the collimating optical system and are respectively incident on the collimating optical system and the light-guiding plate at angles θ | 02-10-2011 |
20110050547 | Image display apparatus and head mounted display - An image display apparatus includes: (A) an image forming device; (B) an optical system that converts light emitted from the image forming device into parallel light; (C) an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted; and (D) a supporting member that pivotally supports at least the image forming device with respect to the optical device, wherein an assembly of at least the image forming device and the supporting member has the center of gravity at a position apart from the pivoting central axis of the supporting member, and at least the image forming device is pivoted with respect to the optical device by gravity, whereby the image forming device is horizontally held. | 03-03-2011 |
20110050655 | Image display apparatus and head mounted display - An image display apparatus includes: an image forming device; an optical system converting light emitted from the image forming device into parallel light; and an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted, wherein a central light beam emitted from the center of the image forming device, passing through the nodal point of the optical system and entering the optical device at an optical device center point intersects an XY plane defined by an X axis that passes through the optical device center point, and is parallel to the axis direction of the optical device and a Y axis that passes through the optical device center point, and coincides with the normal axis of the optical device at angles other than 0 degree. | 03-03-2011 |
20110050727 | Picture/character simultaneously displaying device and head mounted display device - A picture/character simultaneously displaying device includes: a picture display device for displaying a picture based on picture data; and a character display device for displaying characters synchronous with the picture based on character data. The character data contains therein text data about characters synchronous with a picture to be displayed, and metadata about characters to be displayed. | 03-03-2011 |
20110211239 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. Some of the parallel pencil groups guided through the optical waveguide being totally reflected different numbers of times for a period from external incidence upon the optical waveguide until outgoing from the optical waveguide. | 09-01-2011 |
20110241975 | HEAD MOUNTED DISPLAY - There is provided a head mounted display including a glasses-type frame to be worn on a head of an observer; two optical modules including two image creation devices, and two light guides having two light guide plates coupled one-to-one with the two image creation devices and placed closer to a center of a face of the observer than the image creation devices are as a whole, that guide light beams output from the image creation devices and output the light beams toward pupils of the observer; and an optical plate supporting the two light guides, wherein the optical plate is attached to a center part of the frame. | 10-06-2011 |
20120032874 | DISPLAY APPARATUS ASSEMBLY - A display apparatus assembly includes: a display apparatus; and a speed measuring device that measures a movement speed of the display apparatus, wherein the display apparatus includes a glass-type frame that is mounted on a head of an observer and two image displaying devices for left and right eyes that are mounted in the frame, each of the image displaying devices includes an image forming device, an optical system that forms light output from the image forming device to be parallel light, and an optical device to which light output from the optical system is incident and in which the light is guided so as to be output, and a convergence angle is changed based on the movement speed of the display apparatus that is measured by the speed measuring device. | 02-09-2012 |
20120044571 | DISPLAY APPARATUS - A display apparatus includes: a glass-type frame mounted to a head of an observer; and two image displaying devices for the left and right eyes that are attached to the frame. Each of the image displaying devices includes an image forming device, an optical system making light from the image forming device to be parallel light, and an optical device to which the light from the optical system is incident, and in which the light is guided so as to be output, at least one of the image displaying devices further includes a movement device relatively moving optical axes of the image forming device and the optical system in a horizontal direction, and a convergence angle is adjusted by relatively moving the optical axes of the image forming device and the optical system in the horizontal direction using the movement device depending on an observation position of an observer. | 02-23-2012 |
20120081789 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device with an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. | 04-05-2012 |
20120206811 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE - A virtual image display device with an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. | 08-16-2012 |
20120243063 | IMAGE DISPLAY DEVICE - An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. | 09-27-2012 |
20120287374 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device having pixels; a collimating optical system collimating light from the image forming device; and an optical device receiving, guiding, and outputting the collimated light as directional rays in different directions. The optical device includes a light-guiding plate; a first optical member reflecting or diffracting the light so as to totally reflect the light inside the light-guiding plate; and a second optical member causing the propagated light to emerge from the light-guiding plate. When a light ray emitted from a pixel located farthest from the center of the image forming device and a light ray emitted from a pixel located at the center of the image forming device pass through a front nodal point of the collimating optical system and are respectively incident on the collimating optical system and the light-guiding plate at angles θ | 11-15-2012 |
20120287675 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device, a collimating optical system, and an optical device. The optical device includes a light guide plate, a first deflecting member that deflects light incident on the light guide plate, and a second deflecting member that deflects the light, which propagates in the light guide plate by total reflection, a plurality of times. The first and second deflecting members are provided in the light guide plate. Light having one wavelength emitted from at least one pixel satisfies the following condition: | 11-15-2012 |
20130069850 | HEAD-MOUNTED DISPLAY APPARATUS - A head-mounted display apparatus includes an image display device, a wearing device with which the image display device is worn on a head of an observer, and an attachment member with which the image display device is attached to the wearing device. The attachment member is capable of adjusting a position of the image display device relative to the wearing device independently in a first direction and in a second direction, the first direction being defined by a virtual line connecting centers of eyes of the observer, the second direction being perpendicular to the first direction and extending vertically with respect to the observer. | 03-21-2013 |
20130077141 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 03-28-2013 |
20130155513 | OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY - A virtual image display device with an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide. | 06-20-2013 |
20130242555 | IMAGE DISPLAY DEVICE AND IMAGE GENERATING DEVICE - There is provided an image display device including an image generating device, and a light guide unit. When a point at which light output from a center of the image generating device is incident is a point O, a normal line passing through the point O in a portion of the unit is an X axis, an axis of the unit passing through the point O is a Y axis, an optical axis of light incident at the point O among light beams output from a center of the image generating device is a ζ axis, and a virtual plane including the ζ axis and the Y axis is a ζY plane, light output from the image generating device and incident at a point (0,Y | 09-19-2013 |
20130300766 | DISPLAY INSTRUMENT AND IMAGE DISPLAY METHOD - A head-mounted display device including an image display apparatus configured to display a captured image of a portion of an environment viewable through the head-mounted display device; and a dimmer configured to, while the captured image is displayed, allow a portion of ambient light from the environment to pass through the dimmer. Also, a method of displaying information on a head-mounted display device. The method may include displaying a captured image of a portion of an environment viewable through the display device; and dimming ambient light received through the head-mounted display device from the environment while displaying the captured image. | 11-14-2013 |
20130328748 | IMAGE DISPLAY APPARATUS AND HEAD MOUNTED DISPLAY - An image display apparatus includes: an image forming device; an optical system converting light emitted from the image forming device into parallel light; and an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted, wherein a central light beam emitted from the center of the image forming device, passing through the nodal point of the optical system and entering the optical device at an optical device center point intersects an XY plane defined by an X axis that passes through the optical device center point, and is parallel to the axis direction of the optical device and a Y axis that passes through the optical device center point, and coincides with the normal axis of the optical device at angles other than 0 degree. | 12-12-2013 |
20130342914 | IMAGE DISPLAY APPARATUS AND HEAD MOUNTED DISPLAY - An image display apparatus includes: (A) an image forming device; (B) an optical system that converts light emitted from the image forming device into parallel light; (C) an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted; and (D) a supporting member that pivotally supports at least the image forming device with respect to the optical device, wherein an assembly of at least the image forming device and the supporting member has the center of gravity at a position apart from the pivoting central axis of the supporting member, and at least the image forming device is pivoted with respect to the optical device by gravity, whereby the image forming device is horizontally held. | 12-26-2013 |
20140078591 | IMAGE DISPLAY APPARATUS - An image display apparatus includes an image forming device, a collimating optical system, and an optical device. The optical device includes a light guide plate, a first deflecting member that deflects light incident on the light guide plate, and a second deflecting member that deflects the light, which propagates in the light guide plate by total reflection, a plurality of times. The first and second deflecting members are provided in the light guide plate. Light having one wavelength emitted from at least one pixel satisfies the following condition: | 03-20-2014 |
20140125558 | IMAGE DISPLAY DEVICE, IMAGE DISPLAY METHOD, AND COMPUTER PROGRAM - An image display device which is used by being mounted on the head or face of a user includes a display unit which displays an image; an information maintaining unit which maintains user information of the user; a region specifying unit which specifies an attention region from a field of vision of the user based on the user information; an image processing unit which performs image processing with respect to the attention region; and a display control unit which displays the attention region after being subjected to the image processing on the display unit. | 05-08-2014 |
20140126782 | IMAGE DISPLAY APPARATUS, IMAGE DISPLAY METHOD, AND COMPUTER PROGRAM - An image display apparatus used while it is mounted on a user's head or facial area includes a display unit configured to display an inside image viewable from the user; an input unit configured to input an identification pattern from the user; a checking unit configured to check the identification pattern; and a control unit configured to control the image display apparatus on the basis of a result of the checking by the checking unit. | 05-08-2014 |
20140132631 | HEAD MOUNTED DISPLAY, AND IMAGE DISPLAYING METHOD IN HEAD MOUNTED DISPLAY - Disclosed herein is A head mounted display including: (A) an eyeglasses frame-like frame to be mounted to an observer's head; (B) an image display device; (C) an image sensing device mounted to the frame; and (D) a correction section, wherein the image display device includes (B-1) an image generating device, and (B-2) see-through type light guide section which is mounted to the image generating device, on which beams emitted from the image generating device are incident, through which the beams are guided, and from which the beams are emitted toward an observer's pupil. | 05-15-2014 |
20140218779 | IMAGE DISPLAY DEVICE - An image display device includes an image forming device, collimating optical system, and optical device, with the optical device including a light guide plate, first diffraction grating member and second diffraction grating member which are made up of a volume hologram diffraction grating, and with central light emitted from the pixel of the center of the image forming device and passed through the center of the collimating optical system being input to the light guide plate from the near side of the second diffraction grating member with a certain angle. Thus, the image display device capable of preventing occurrence of color irregularities, despite the simple configuration, can be provided. | 08-07-2014 |
20140293389 | OPTICAL DEVICE AND VIRTUAL IMAGE DISPLAY - An optical device includes: a light guide plate receiving, for each of N types of wavelength bands, a plurality of parallel light beams with different incident angles each corresponding to view angles, and guiding the received parallel light beams; a first and a second volume hologram gratings of reflection type having a diffraction configuration which includes N types of interference fringes each corresponding to the N types of wavelength bands, and diffracting/reflecting the parallel light beams. The optical device satisfies for each wavelength band, a relationship of ‘P>L’, where ‘L’ represents a central diffraction wavelength in the first and second volume hologram gratings, defined for a parallel light beam corresponding to a central view angle, and ‘P’ represents a peak wavelength of the parallel light beams. | 10-02-2014 |
20140334010 | DISPLAY APPARATUS - A display apparatus includes: a glass-type frame mounted to a head of an observer; and two image displaying devices for the left and right eyes that are attached to the frame. Each of the image displaying devices includes an image forming device, an optical system making light from the image forming device to be parallel light, and an optical device to which the light from the optical system is incident, and in which the light is guided so as to be output, at least one of the image displaying devices further includes a movement device relatively moving optical axes of the image forming device and the optical system in a horizontal direction, and a convergence angle is adjusted by relatively moving the optical axes of the image forming device and the optical system in the horizontal direction using the movement device depending on an observation position of an observer. | 11-13-2014 |
20150070772 | IMAGE DISPLAY APPARATUS AND HEAD MOUNTED DISPLAY - An image display apparatus includes: an image forming device; an optical system converting light emitted from the image forming device into parallel light; and an optical device to which the light beams converted into the parallel light by the optical system enter, in which the light beams are guided, and from which the light beams are emitted, wherein a central light beam emitted from the center of the image forming device, passing through the nodal point of the optical system and entering the optical device at an optical device center point intersects an XY plane defined by an X axis that passes through the optical device center point, and is parallel to the axis direction of the optical device and a Y axis that passes through the optical device center point, and coincides with the normal axis of the optical device at angles other than 0 degree. | 03-12-2015 |