# US 10,313,666 B2 · Display device and display method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,313,666 B2 - Document ID: US10313666B2 - Status: Granted - Kind: B2 - Application number: 15/308,356 - Filed: 2015-05-08 - Published: 2017-02-23 - Granted: 2019-06-04 - Earliest claimed: 2014-05-12 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Kenichi Kasazumi; Toshiya Mori - Web page: https://patentgrep.com/patent/US10313666B2 ## CPC - H04N 13/398: Synchronisation thereof; Control thereof - B60K 35/10: Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor - B60K 35/211: {producing three-dimensional [3D] effects, e.g. stereoscopic images} - B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) - B60K 35/29: Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions - B60K 35/81: for controlling displays - B60R 16/02: electric {constitutive elements} - G01C 21/36: Input/output arrangements for on-board computers - G02B 27/01: Head-up displays - G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)} - G02B 30/34: Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. three-dimensional [3D] slide viewers - G09G 5/36: characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory - H04N 13/106: Processing image signals (for multi-view video sequence encoding H04N19/597) - H04N 13/30: Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) - H04N 13/365: using digital micromirror devices [DMD] - B60K 35/213: {Virtual instruments} - B60K 2360/18: Information management - B60K 2360/27: using semi-transparent optical elements - B60K 2360/334: Projection means - B60K 2360/347: Optical elements for superposition of display information - B60R 2300/107: using stereoscopic cameras - B60R 2300/205: using a head-up display - B60R 2300/8086: for vehicle path indication - G01C 21/365: {Guidance using head up displays or projectors, e.g. virtual vehicles or arrows projected on the windscreen or on the road itself} - G02B 2027/0134: {of stereoscopic type} - G02B 2027/0138: {comprising image capture systems, e.g. camera} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract This display device is provided with a display unit and a control unit. The display unit projects and reflects, onto a light-transmitting display medium, light expressing an image, to allow the image to be viewed, as a virtual image, by a user. The control unit performs first stereoscopic display processing for causing light respectively expressing a left-eye image and a right-eye image of an object to be displayed, to be projected in the display unit. As a result of this processing, the object to be displayed can be stereoscopically viewed in a three-dimensional image space by the user. ## Claims ### Claim 1 A display device comprising: a display that projects light indicating an image to a display medium with translucency and reflects the light to the display medium to allow a user to visually recognize the image as a virtual image; a memory that stores instructions; a processor which, when executing the instructions stored in the memory, performs operations comprising: performing a first stereoscopic display process for projecting light indicating each of first image for a left eye and a first image for a right eye of a display object on the display such that a stereoscopic view of the display object is displayed to the user in a three-dimensional image space, determining whether a display distance, that is a distance from a display standard position of the three-dimensional image space in a depth direction to a position of the display object, is greater than or equal to than a predetermined threshold value, performing a second stereoscopic display process with respect to each of a plurality of portions of a pattern in sequential order from a near side toward a far side in the image space, for projecting light indicating each of a second image for a left eye and a second image for a right eye of each portion of the plurality of portions of the pattern, such that a stereoscopic view of the pattern is displayed to the user when it is determined that the display distance is greater than or equal to the threshold value. ### Claim 2 (depends on 1) The display device of claim 1, wherein the processor, when executing the instructions stored in the memory, further performs operations comprising: performing the second stereoscopic display process with respect to each of the plurality of portions which are continuously disposed in the depth direction. ### Claim 3 (depends on 1) The display device according of claim 1, wherein the processor, when executing the instructions stored in the memory, further performs operations comprising: performing the second stereoscopic display process with respect to each of the plurality of portions which are intermittently disposed in the depth direction. ### Claim 4 (depends on 1) The display device of claim 1, wherein the processor, when executing the instructions stored in the memory, further performs operations comprising: performing the first stereoscopic display process such that the display object is viewed smaller with an increase in a distance of a position of the display object in the image space in the depth direction. ### Claim 5 (depends on 1) The display device of claim 1, wherein the processor, when executing the instructions stored in the memory, further performs operations comprising: performing the first stereoscopic display process such that the position of the display object to be viewed is higher with an increase in a distance of the position of the display object in the image space in the depth direction. ### Claim 6 (depends on 1) The display device of claim 1, wherein the processor, when executing the instructions stored in the memory, further performs operations comprising: performing a plan display process for projecting light indicating the same image to left and right eyes to the display so that the user visually recognize a display object for a plan view in the image space, regardless of whether or not the first stereoscopic display process and the second stereoscopic display process are performed. ### Claim 7 (depends on 6) The display device of claim 6, wherein the display object for a plan view is a meter indicating a state of a car on which the display device is mounted as a numerical value. ### Claim 8 (depends on 1) The display device of claim 1, wherein the pattern is a line which is parallel to a central axis of the car on which the display device is mounted, or a line indicating a center or a road shoulder of a road in which the car is traveling. ### Claim 9 A display method using a display that projects light indicating an image to a display medium with translucency and reflects the light to the display medium to allow a user to visually recognize the image as a virtual image, the method comprising: performing a first stereoscopic display process for projecting light indicating each of a first image for a left eye and first image for a right eye of a display object on the display such that a stereoscopic view of the display object is displayed to the user in a three-dimensional image space; determining whether a display distance, which is a distance from a display standard position of the three-dimensional image space in a depth direction to a position of the display object, is greater than or equal to a predetermined threshold value; and performing a second stereoscopic display process with respect to each of a plurality of portions of a pattern in sequential order from a near side toward a far side in the image space, for projecting light indicating each of a second image for a left eye and a second image for a right eye of each portion of the plurality of portions of the pattern, such that a stereoscopic view of the pattern is displayed to the user when it is determined that the display distance is greater than or equal to the threshold value.