# US 2021/0243419 A1 · Display device, display system, and movable vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243419 A1 - Document ID: US20210243419A1 - Status: Published application - Kind: A1 - Application number: 17/263,542 - Filed: 2019-07-25 - Published: 2021-08-05 - Earliest claimed: 2018-07-27 - Assignees: KYOCERA Corporation - Applicants: KYOCERA Corporation - Inventors: Kaoru KUSAFUKA; Mitsuhiro MURATA - Web page: https://patentgrep.com/patent/US20210243419A1 ## CPC - G02B 30/31: involving active parallax barriers (involving directional light or back-light sources G02B30/33) - H04N 13/122: Improving the three-dimensional [3D] impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues (H04N13/128 takes precedence) - 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 35/235: with means for detecting the driver's gaze direction or eye points - 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 - G02B 30/32: characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size - H04N 13/31: using parallax barriers - H04N 13/315: the parallax barriers being time-variant - H04N 13/317: using slanted parallax optics - H04N 13/324: Colour aspects - H04N 13/356: having separate monoscopic and stereoscopic modes - H04N 13/361: Reproducing mixed stereoscopic images; Reproducing mixed monoscopic and stereoscopic images, e.g. a stereoscopic image overlay window on a monoscopic image background - H04N 13/383: for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes - G02B 2027/0134: {of stereoscopic type} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 ## Abstract A display device is switchable between 3D image display and 2D image display. The display device includes a first display panel, a second display panel, a controller, and an optical system. The first and second display panels each include subpixels arranged in a grid. The controller performs switching and/or is configured to perform switching between multiple display modes including a first display mode for displaying a 2D image and a second display mode for displaying a parallax image on the first display panel, and switches and/or is configured to switch a drive mode of the second display panel between multiple drive modes including a first drive mode corresponding to the first display mode and a second drive mode corresponding to the second display mode. ## Claims ### Claim 1 A display device, comprising: a first display panel including first subpixels arranged in a grid in a first direction and a second direction; a second display panel including second subpixels arranged in a grid in the first direction and the second direction; a controller configured to control the first subpixels and the second subpixels based on image data; and an optical system configured to project an image displayed on the first display panel into a field of view of a user, the controller being configured to perform switching between display modes including a first display mode for displaying a two-dimensional image on the first display panel and a second display mode for displaying a parallax image on the first display panel, and to perform switching of a drive mode of the second display panel between drive modes including a first drive mode corresponding to the first display mode and a second drive mode corresponding to the second display mode, wherein the controller is configured to display the two-dimensional image in a third area on the first display panel, display the parallax image in a fourth area different from the third area on the first display panel, and to control a fifth area on the second display panel corresponding to the third area to operate in the first drive mode and control a sixth area on the second display panel corresponding to the fourth area to operate in the second drive mode, wherein the fifth area includes a seventh area, corresponding to an image display area within the third area, and an eighth area, corresponding to a non-image display area within the third area, the controller being configured to set second subpixels included in the eighth area to have a dark tone and set second subpixels included in the seventh area to have a light tone. ### Claim 2 (depends on 1) The display device according to claim 1, wherein in the second display mode, the controller causes third subpixels selected from the first subpixels to display an image for the left eye, causes fourth subpixels selected from the first subpixels other than the first subpixels selected as the third subpixels to display an image for the right eye, and controls the second subpixels to operate in the second drive mode, and in the second drive mode, the controller sets first areas including selected ones of the second subpixels to have a darker tone than second areas including selected ones of the second subpixels to attenuate at least a portion of image light passing through the third subpixels toward the right eye of the user through the first areas and to attenuate at least a portion of image light passing through the fourth subpixels toward the left eye of the user through the first areas. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the second areas each continuously extend obliquely to the first direction and the second direction, and/or are periodically arranged in the first direction at predetermined intervals, and/or have substantially the same width, and/or the first areas each continuously extend obliquely to the first direction and the second direction, and/or are periodically arranged in the first direction at predetermined intervals, and/or have substantially the same width, and/or the first areas and the second areas are arranged alternately. ### Claim 4 (depends on 2) The display device according to claim 2, wherein in the second drive mode, the controller sets the first areas to have a darkest tone for the second subpixels. ### Claim 5 (depends on 2) The display device according to claim 2, further comprising: an input unit configured to receive an input of positional information about the left and right eyes of the user, wherein in the second drive mode, the controller shifts the first areas based on the positional information about the left and right eyes of the user received by the input unit and/or wherein in the second display mode, the controller shifts the third subpixels and the fourth subpixels based on the positional information about the left and right eyes of the user received by the input unit. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the controller is configured to partially perform switching between the first display mode and the second display mode, and partially perform switching between the first drive mode and the second drive mode. ### Claim 7 (canceled) ### Claim 8 (depends on 1) The display device according to claim 1, wherein in the first display mode, the controller detects an image display area and a non-image display area from the image data, causes the first subpixels included in the first display panel to display an image based on the image data, and sets second subpixels corresponding to the non-image display area to have a darkest tone for the second subpixels. ### Claim 9 (depends on 8) The display device according to claim 8, further comprising: an input unit configured to receive an input of positional information about the left and right eyes of the user, wherein in the first drive mode, the controller shifts the second subpixels corresponding to the non-image display area based on the positional information about the left and right eyes of the user received by the input unit. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the first display panel includes a color filter corresponding to the first subpixels, and/or the second display panel includes no color filter. ### Claim 11 (depends on 1) The display device according to claim 1, wherein: the controller is configured to control a third area including first subpixels selected from the first subpixels included in the first display panel to operate in the first display mode, control a fourth area including first subpixels other than the first subpixels included in the third area selected from the first subpixels included in the first display panel to operate in the second display mode, control a fifth area including second subpixels corresponding to the third area selected from the second subpixels included in the second display panel to operate in the first drive mode, and control a sixth area including second subpixels corresponding to the fourth area selected from the second subpixels included in the second display panel to operate in the second drive mode. ### Claim 12 (depends on 1) The display device according to claim 1, wherein the optical system is configured to project a virtual image of the first display panel into the field of view of the user. ### Claim 13 (depends on 1) The display device according to claim 1, the second display panel being arranged between the first display panel and the optical system, and/or the display device further comprising an illuminator, wherein optionally the first display panel is arranged between the illuminator and the second display panel, wherein further optionally the illuminator, the first display panel and the second display panel are arranged in the stated order from the far side from a user along an optical path of the image light from the image displayed for the user and/or wherein further optionally the illuminator, the first display panel, the second display panel and the optical system are arranged in the stated order, and/or the first display panel being a self-luminous display panel, wherein optionally the first display panel and the second display panel are arranged in the stated order from the far side from a user along an optical path of the image light from the image displayed for the user and/or wherein optionally the first display panel, the second display panel and the optical system are arranged in the stated order. ### Claim 14 (depends on 1) A display system, comprising: a display device according to claim 1; and a detector configured to detect positions of the left and right eyes of the user, wherein in the second drive mode, the controller controls at least one of the first display panel and the second display panel based on the positions of the left and right eyes of the user detected by the detector. ### Claim 15 (depends on 1) A movable object, comprising: a display device according to claim 1. ### Claim 16 (depends on 1) The display device according to claim 1, the plurality of second subpixels being arranged with the same pitch as the plurality of first subpixels, optionally the first direction corresponding to a direction for causing parallax between left and right eyes of a user, and/or the second direction and the first direction intersecting each other, with the second direction optionally being substantially perpendicular to the first direction, and/or wherein the first display panel and/or the second display panel include a transmissive display area, and/or wherein at least one of the first display panel and the second display panel, which is arranged closer the user than the other one, include a transmissive display area, and/or wherein the first subpixels each overlap one of the second subpixels in a direction normal to the first display panel, and/or wherein the first display panel and the second display panel are arranged to allow an output from the first display panel to enter the second display panel or to allow an output from the second display panel to enter the first display panel. ### Claim 17 (depends on 14) A movable object, comprising: a display system according to claim 14.