# US 9,521,403 B2 · Display device and electronic apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,403 B2 - Document ID: US9521403B2 - Status: Granted - Kind: B2 - Application number: 13/043,744 - Filed: 2011-03-09 - Published: 2011-09-22 - Granted: 2016-12-13 - Earliest claimed: 2010-03-16 - Assignees: Japan Display Inc. - Applicants: Goro Hamagishi - Inventors: Goro Hamagishi - Web page: https://patentgrep.com/patent/US9521403B2 ## CPC - H04N 13/315: the parallax barriers being time-variant - G02B 30/27: involving lenticular arrays - G02B 30/31: involving active parallax barriers (involving directional light or back-light sources G02B30/33) - G03B 35/24: using apertured or refractive resolving means on screens or between screen and eye - G09G 3/003: {to produce spatial visual effects} - G09G 3/3611: {Control of matrices with row and column drivers} - H04N 13/376: for tracking left-right translational head movements, i.e. lateral movements - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G09G 2300/023: Display panel composed of stacked panels - G09G 2354/00: Aspects of interface with display user - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - 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) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A display device includes: an image display means for displaying left-eye images and right-eye images alternately; a light-shielding means for generating an effect of binocular parallax in images displayed by the image display means; and a detection means for detecting a position of an observer, wherein the light-shielding means includes an image transmitting portion through which images of the image display means are transmitted and an image non-transmitting portion through which images are not transmitted, which moves a position of the image transmitting portion by ½, ¼ or ⅛ of a light-shielding portion pitch prescribed by an arrangement interval of the image transmitting portion based on a detected result of the detection means. ## Claims ### Claim 1 A display device comprising: an image display device for displaying left-eye images and right-eye images alternately; a light-shielding barrier for generating an effect of binocular parallax in images displayed by the image display device, the light-shielding barrier being formed by a liquid crystal panel; and a detection device for detecting a head position of an observer to obtain head position information including: a to-display distance from a head of the observer perpendicular to a surface of the image display device; and a shift distance that the head position moves parallel to the surface of the image display device, wherein the light-shielding barrier having a plurality of barrier portions each includes: an image transmitting portion through which images of the image display device are transmitted; and an image non-transmitting portion through which images are not transmitted, wherein, when the shift distance is E: a distance between the eyes of the observer, 1/2E, or 4/1E, the light-shielding barrier moves a position of the image transmitting portion by ½, ¼, or ⅛ of a light-shielding portion pitch, respectively, the light-shielding portion pitch being defined by an arrangement interval of the image transmitting portion, wherein one pitch of the light-shielding portion pitch includes four pixels in the liquid crystal panel and one of the four pixels forms the image transmitting portion, wherein, when the observer is positioned at a suitable viewing position, only right-eye images of the image display are incident on a right eye after transmitting through a center of each image transmitting portions of the light-shielding barrier, and only left-eye images of the image display are incident on the left eye after transmitting through a center of each transmitting portions of the light-shielding barrier, wherein a suitable viewing distance is the to-display distance at the suitable viewing position, wherein a backward image is an image that is observed by one of the eyes of the observer when the to-display distance is greater than the suitable viewing distance and that includes a crosstalk image, wherein the backward image includes: a right crosstalk image having a right crosstalk central in a center of the right crosstalk image in the horizontal direction; a normal image having a normal central in a center of the normal image in a horizontal direction; and a left crosstalk image having a left crosstalk central in a center of the left crosstalk image in a horizontal direction, and wherein the light-shielding barrier controls a movement amount of the image transmitting portion individually in each of the barrier portions according to positional relations of the left crosstalk central, the normal central, the right crosstalk central, and each of the barrier portions to allow the transmitting portion, which is changed to be observed as the crosstalk image due to a change of the to-display distance, to become the image non-transmitting portion. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the light-shielding barrier is configured to switch the number of pixels forming the image transmitting portions. ### Claim 3 (depends on 1) An electronic apparatus comprising the display device according to claim 1. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the head position information further includes a position of one of right and left eyes of the observer, and wherein the light-shielding barrier moves a position of the image non-transmitting portion based on the position of the one of the right and left eyes of the observer. ### Claim 5 A display device comprising: an image display device for displaying left-eye images and right-eye images alternately; a light-shielding barrier for generating an effect of binocular parallax in images displayed by the image display device, the light-shielding barrier being formed by a liquid crystal panel; and a detection device for detecting a head position of an observer to obtain head position information including: a to-display distance from a head of the observer perpendicular to a surface of the image display device; and a shift distance that the head position moves parallel to the surface of the image display device, wherein the light-shielding barrier having a plurality of barrier portions each includes: an image transmitting portion through which images of the image display device are transmitted; and an image non-transmitting portion through which images are not transmitted, wherein, when the shift distance is E: a distance between the eyes of the observer, 1/2E, or 4/1E, the light-shielding barrier moves a position of the image transmitting portion by ½, ¼, or ⅛ of a light-shielding portion pitch, respectively, the light-shielding portion pitch being defined by an arrangement interval of the image transmitting portion, wherein one pitch of the light-shielding portion pitch includes eight pixels in the liquid crystal panel and adjacent two or three of the eight pixels form the image transmitting portions, wherein, when the observer is positioned at a suitable viewing position, only right-eye images of the image display are incident on a right eye after transmitting through a center of each image transmitting portions of the light-shielding barrier, and only left-eye images of the image display are incident on the left eye after transmitting through a center of each transmitting portions of the light-shielding barrier, wherein a suitable viewing distance is the to-display distance at the suitable viewing position, wherein a backward image is an image that is observed by one of the eyes of the observer when the to-display distance is greater than the suitable viewing distance and that includes a crosstalk image, wherein the backward image includes: a right crosstalk image having a right crosstalk central in a center of the right crosstalk image in the horizontal direction; a normal image having a normal central in a center of the normal image in a horizontal direction; and a left crosstalk image having a left crosstalk central in a center of the left crosstalk image in a horizontal direction, and wherein the light-shielding barrier controls a movement amount of the image transmitting portion individually in each of the barrier portions according to positional relations of the left crosstalk central, the normal central, the right crosstalk central, and each of the barrier portions to allow the transmitting portion, which is changed to be observed as the crosstalk image due to a change of the to-display distance, to become the image non-transmitting portion. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the light-shielding barrier is configured to switch the number of pixels forming the image transmitting portions. ### Claim 7 (depends on 5) An electronic apparatus comprising the display device according to claim 5. ### Claim 8 (depends on 5) The display device according to claim 5, wherein the head position information further includes a position of one of right and left eyes of the observer, and wherein the light-shielding barrier moves a position of the image non-transmitting portion based on the position of the one of the right and left eyes of the observer.