# US 10,371,958 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,958 B2 - Document ID: US10371958B2 - Status: Granted - Kind: B2 - Application number: 15/752,729 - Filed: 2017-06-06 - Published: 2018-08-23 - Granted: 2019-08-06 - Earliest claimed: 2016-06-24 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Wei Wang; Yafeng Yang; Xiaochuan Chen; Jifeng Tan; Can Wang; Xinli Ma; Jian Gao; Can Zhang; Qian Wang - Web page: https://patentgrep.com/patent/US10371958B2 ## CPC - G02B 5/1819: {Plural gratings positioned on the same surface, e.g. array of gratings (plural diffractive elements positioned sequentially along the optical path G02B27/4272)} - G02B 5/18: Diffraction gratings {(holographic optical elements G02B5/32, G03H; integrally combined with optical fibres G02B6/02057; for coupling light guides G02B6/34; integrally combined with optical integrated light guides G02B6/12; grating systems G02B27/44)} - G02B 5/1866: {Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials (G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence)} - G02B 30/27: involving lenticular arrays - G02B 30/30: involving parallax barriers - G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)} - G02F 1/29: for the control of the position or the direction of light beams, i.e. deflection - H04N 13/31: using parallax barriers - H04N 13/344: with head-mounted left-right displays - G02F 1/1335: Structural association of cells with optical devices, e.g. polarisers or reflectors - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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 - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A display device comprises a display panel and a grating layer. From a center of a left-eye field-of-view central area of a left display area to a non left-eye field-of-view central area of the left display area, a grating period of a left-eye grating region of a first color, a grating period of a left-eye grating region of a second color, and a grating period of a left-eye grating region of a third color all decrease gradually. From a center of a right-eye field-of-view central area of a right display area to a non right-eye field-of-view central area of the right display area, a grating period of a right-eye grating region of the first color, a grating period of a right-eye grating region of the second color, and a grating period of a right-eye grating region of the third color all decrease gradually. ## Claims ### Claim 1 A display device, comprising: a display panel, and a grating layer arranged inside or outside of the display panel, wherein the display panel comprises a left display area corresponding to a left eye of a viewer and a right display area corresponding to a right eye of the viewer; the left display area comprises a plurality of left-eye pixels of a first color, a plurality of left-eye pixels of a second color, a plurality of left-eye pixels of a third color, and the right display area comprises a plurality of right-eye pixels of the first color, a plurality of right-eye pixels of the second color, and a plurality of right-eye pixels of the third color; the grating layer comprises a left grating region corresponding to the left display area, and a right grating region corresponding to the right display area, the left grating region comprises a left-eye grating region of the first color corresponding to the left-eye pixels of the first color, a left-eye grating region of the second color corresponding to the left-eye pixels of the second color, and a left-eye grating region of the third color corresponding to the left-eye pixels of the third color, the right grating region comprises a right-eye grating region of the first color corresponding to the right-eye pixels of the first color, a right-eye grating region of the second color corresponding to the right-eye pixels of the second color, and a right-eye grating region of the third color corresponding to the right-eye pixels of the third color; along a direction from a center of a left-eye field-of-view central area of the left display area to a non left-eye field-of-view central area of the left display area, a grating period of the left-eye grating region of the first color, a grating period of the left-eye grating region of the second color, and a grating period of the left-eye grating region of the third color all decrease gradually, and light emitted by the display device from a position corresponding to the left-eye pixels of the first color, light emitted by the display device from a position corresponding to the left-eye pixels of the second color, and light emitted by the display device from a position corresponding to the left-eye pixels of the third color are all directed to the left eye of the viewer; along a direction from a center of a right-eye field-of-view central area of the right display area to a non right-eye field-of-view central area of the right display area, a grating period of the right-eye grating region of the first color, a grating period of the right-eye grating region of the second color, and a grating period of the right-eye grating region of the third color all decrease gradually, and light emitted by the display device from a position corresponding to the right-eye pixels of the first color, light emitted by the display device from a position corresponding to the right-eye pixels of the second color, and light emitted by the display device from a position corresponding to the right-eye pixels of the third color are all directed to the right eye of the viewer; and the left-eye field-of-view central area does not overlap with the right-eye field-of-view central area. ### Claim 2 (depends on 1) The display device according to claim 1, wherein along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, from the center of the left-eye field-of-view central area to both sides of the left display area, the grating period of the left-eye grating region of the first color, the grating period of the left-eye grating region of the second color, and the grating period of the left-eye grating region of the third color all decrease gradually; along the direction parallel to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, from the center of the right-eye field-of-view central area to both sides of the right display area, the grating period of the right-eye grating region of the first color, the grating period of the right-eye grating region of the second color, and the grating period of the right-eye grating region of the third color all decrease gradually. ### Claim 3 (depends on 1) The display device according to claim 1, wherein along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, from the center of the left-eye field-of-view central area to both sides of the left display area, the grating period of the left-eye grating region of the first color, the grating period of the left-eye grating region of the second color, and the grating period of the left-eye grating region of the third color all decrease gradually; along the direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, from the center of the right-eye field-of-view central area to both sides of the right display area, the grating period of the right-eye grating region of the first color, the grating period of the right-eye grating region of the second color, and the grating period of the right-eye grating region of the third color all decrease gradually. ### Claim 4 (depends on 1) The display device according to claim 1, wherein the plurality of left-eye pixels of the first color, the plurality of left-eye pixels of the second color, the plurality of left-eye pixels of the third color are arranged to form an array of left-eye pixels, rows of pixels of the array of left-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of left-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of left-eye pixels includes a plurality of left-eye pixels of the first color, a plurality of left-eye pixels of the second color and a plurality of left-eye pixels of the third color that are arranged alternately; each column of pixels of the array of left-eye pixels includes one type of the left-eye pixels of the first color, the left-eye pixels of the second color and the left-eye pixels of the third color. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the plurality of left-eye pixels of the first color, the plurality of left-eye pixels of the second color, the plurality of left-eye pixels of the third color are arranged to form an array of left-eye pixels, rows of pixels of the array of left-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of left-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of left-eye pixels includes one type of the left-eye pixels of the first color, the left-eye pixels of the second color and the left-eye pixels of the third color; each column of pixels of the array of left-eye pixels includes a plurality of left-eye pixels of the first color, a plurality of left-eye pixels of the second color and a plurality of left-eye pixels of the third color that are arranged alternately. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the plurality of left-eye pixels of the first color, the plurality of left-eye pixels of the second color, the plurality of left-eye pixels of the third color are arranged to form an array of left-eye pixels, rows of pixels of the array of left-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of left-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of left-eye pixels includes a plurality of left-eye pixels of the first color, a plurality of left-eye pixels of the second color and a plurality of left-eye pixels of the third color that are arranged alternately; each column of pixels of the array of left-eye pixels includes a plurality of left-eye pixels of the first color, a plurality of left-eye pixels of the second color and a plurality of left-eye pixels of the third color that are arranged alternately. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the plurality of right-eye pixels of the first color, the plurality of right-eye pixels of the second color, the plurality of right-eye pixels of the third color are arranged to form an array of right-eye pixels, rows of pixels of the array of right-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of right-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of right-eye pixels includes a plurality of right-eye pixels of the first color, a plurality of right-eye pixels of the second color and a plurality of right-eye pixels of the third color that are arranged alternately; each column of pixels of the array of right-eye pixels includes one type of the right-eye pixels of the first color, the right-eye pixels of the second color and the right-eye pixels of the third color. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the plurality of right-eye pixels of the first color, the plurality of right-eye pixels of the second color, the plurality of right-eye pixels of the third color are arranged to form an array of right-eye pixels, rows of pixels of the array of right-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of right-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of right-eye pixels includes one type of the right-eye pixels of the first color, the right-eye pixels of the second color and the right-eye pixels of the third color; each column of pixels of the array of right-eye pixels includes a plurality of right-eye pixels of the first color, a plurality of right-eye pixels of the second color and a plurality of right-eye pixels of the third color that are arranged alternately. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the plurality of right-eye pixels of the first color, the plurality of right-eye pixels of the second color, the plurality of right-eye pixels of the third color are arranged to form an array of right-eye pixels, rows of pixels of the array of right-eye pixels extend along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, columns of pixels of the array of right-eye pixels extend along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area; each row of pixels of the array of right-eye pixels includes a plurality of right-eye pixels of the first color, a plurality of right-eye pixels of the second color and a plurality of right-eye pixels of the third color that are arranged alternately; each column of pixels of the array of right-eye pixels includes a plurality of right-eye pixels of the first color, a plurality of right-eye pixels of the second color and a plurality of right-eye pixels of the third color that are arranged alternately. ### Claim 10 (depends on 1) The display device according to claim 1, wherein the left grating region comprises a plurality of left grating bulges, which are bar-shaped left grating bulges, each left grating bulges extends along a direction perpendicular to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, and the plurality of left grating bulges are arranged in parallel along a direction parallel to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area. ### Claim 11 (depends on 1) The display device according to claim 1, wherein the left grating region comprises a plurality of left grating bulges, which are bar-shaped left grating bulges, each left grating bulges extends along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, and the plurality of left grating bulges are arranged in parallel along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area. ### Claim 12 (depends on 1) The display device according to claim 1, wherein the right grating region comprises a plurality of right grating bulges, which are bar-shaped right grating bulges, each right grating bulges extends along a direction perpendicular to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, and the plurality of right grating bulges are arranged in parallel along a direction parallel to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area. ### Claim 13 (depends on 1) The display device according to claim 1, wherein the right grating region comprises a plurality of right grating bulges, which are bar-shaped right grating bulges, each right grating bulge extends along a direction parallel to a line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area, and the plurality of right grating bulges are arranged in parallel along a direction perpendicular to the line between the center of the left-eye field-of-view central area and the center of the right-eye field-of-view central area. ### Claim 14 (depends on 1) The display device according to claim 1, wherein the viewer views an image displayed on the display device, the image is projected on a virtual screen behind the display device, the virtual screen is a curved-surface virtual screen, the virtual screen has a center of a circle, and a midpoint of a line between the left eye and right eye of the viewer is at the center of circle of the virtual screen. ### Claim 15 (depends on 1) The display device according to claim 1, wherein the viewer views an image displayed on the display device, the image is projected on a virtual screen behind the display device, the virtual screen is a curved-surface virtual screen, the virtual screen has a center of circle, and the viewer is at a side of the center of circle of the virtual screen close to the virtual screen. ### Claim 16 (depends on 1) The display device according to claim 1, wherein the viewer views an image displayed on the display device, the image is projected on a virtual screen behind the display device, the virtual screen is a curved-surface virtual screen and has a center of circle, the display device is at a side of the center of circle of the virtual screen close to the virtual screen, and the viewer is at a side of the center of circle of the virtual screen far away from the virtual screen. ### Claim 17 (depends on 1) The display device according to claim 1, wherein the left grating region comprises a plurality of left grating bulges, wherein a left grating bulge corresponding to the left-eye field-of-view central area has a thickness hAL that satisfies the formula of: h AL = m AL ⁢ ⁢ λ  n GAL - n SAL  wherein, nGAL is a refractive index of the left grating bulge corresponding to the left-eye field-of-view central area, nSAL is a refractive index of a filler in a gap between two adjacent left grating bulges corresponding to the left-eye field-of-view central area, λ is a wavelength of incident light incident on the grating layer, mAL is a first constant, which satisfies: iAL−½