# US 10,455,225 B2 · Multi-layered display with interstitial layer air filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,225 B2 - Document ID: US10455225B2 - Status: Granted - Kind: B2 - Application number: 15/594,166 - Filed: 2017-05-12 - Published: 2018-11-15 - Granted: 2019-10-22 - Earliest claimed: 2017-05-12 - Assignees: Pure Depth Limited - Applicants: Pure Depth Limited - Inventors: Roland Stoller; Stefan Guellich; Sven Oliver Kuerschner; James Emslie - Web page: https://patentgrep.com/patent/US10455225B2 ## CPC - H04N 13/388: Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume - G02B 30/52: the three-dimensional [3D] volume being constructed from a stack or sequence of two-dimensional [2D] planes, e.g. depth sampling systems - G02F 1/133308: {Support structures for LCD panels, e.g. frames or bezels} - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - H04N 13/395: with depth sampling, i.e. the volume being constructed from a stack or sequence of two-dimensional [2D] image planes - G02F 1/133311: {Environmental protection, e.g. against dust or humidity} - G02F 1/133385: {with cooling means, e.g. fans} - G02F 2201/36: Airflow channels, e.g. constructional arrangements facilitating the flow of air - G09G 2300/023: Display panel composed of stacked panels - H04N 2213/001: Constructional or mechanical details - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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 - 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 A multi-layer display (MLD) system may include a plurality of display screens including at least first and second display screens arranged in a substantially parallel and overlapping manner, such that an air gap exists between the first display screen and the second display screen. An opening in the enclosure may exist such that air can flow through the opening between the air gap and outside of the enclosure, and a membrane covering the opening, the membrane being porous to air and non-porous to small particulates and water. ## Claims ### Claim 1 A multi-layer display system for displaying three-dimensional images, comprising: at least first and second display screens arranged in an enclosure in a substantially parallel and overlapping manner such that an air gap exists between the first display screen and the second display screen; an opening in the enclosure such that air can flow through the opening between the air gap and outside of the enclosure; and a membrane covering the opening, the membrane being porous to air and non-porous to small particulates and water; wherein the first and second display screens are provided with at least one spacer and a seal therebetween, so that the air gap exists in an area between the first and second display screens and is surrounded by the at least one spacer and seal. ### Claim 2 (depends on 1) The multi-layer display system according to claim 1, wherein, except for the opening, the area of the air gap is sealed by the spacer and the seal. ### Claim 3 (depends on 2) The multi-layer display system according to claim 2, wherein the spacer and seal are applied substantially around edges of at least one of the first and second display screens. ### Claim 4 (depends on 1) The multi-layer display system according to claim 1, wherein the at least one spacer comprises a plurality of spacers of a same height such that an even separation exists throughout between the first and second display screens. ### Claim 5 (depends on 1) The multi-layer display system according to claim 1, wherein the opening is circular. ### Claim 6 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed to enable moisture to flow from the air gap to outside the air gap but prevent water from entering the air gap from the outside. ### Claim 7 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed to maintain a maximum pressure differential sufficient to prevent mura appearing. ### Claim 8 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed to maintain a maximum pressure differential sufficient to prevent optical stress and physical stress. ### Claim 9 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed to enable transfer of heat from the air gap to outside the air gap. ### Claim 10 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed of a material including plastic. ### Claim 11 (depends on 1) The multi-layer display system according to claim 1, wherein the membrane is constructed from a material including Gore-Tex™. ### Claim 12 (depends on 1) The multi-layer display system according to claim 1, wherein the opening is on the rear side of the enclosure. ### Claim 13 (depends on 1) The multi-layer display system according to claim 1, wherein the first display screen and the second display screen are sealed to the enclosure with one or more spacers and sealant. ### Claim 14 A method of forming a multi-layered display, the method comprising: arranging at least first and second display screens in an enclosure in a substantially parallel and overlapping manner such that an air gap exists between the first display screen and the second display screen; making an opening in the enclosure such that air can flow through the opening between the air gap and outside of the enclosure; and covering the opening with a membrane, the membrane being porous to air and non-porous to particulates and water. ### Claim 15 (depends on 14) The method according to claim 14, further comprising pressing the first and second display screens together with a spacer and sealing such that the air gap exists in an area between the first and second display screens and surrounded by the spacer and sealing. ### Claim 16 (depends on 15) The method according to claim 15, wherein, except for the opening, the area of the air gap is sealed by the spacer and the sealing. ### Claim 17 (depends on 16) The method according to claim 16, wherein the spacer and sealing are applied substantially around edges of at least one of the first and second display screens. ### Claim 18 A multi-layer display system for displaying three-dimensional images, comprising: at least first and second displays arranged in a substantially parallel and overlapping manner such that an air gap exists between the first display and the second display; an opening provided such that air can flow through the opening between the air gap and an external area; a membrane covering the opening, the membrane being porous to air and non-porous to small particulates and water; and wherein the first and second displays are provided with at least one spacer and a seal therebetween, so that the air gap exists in an area between the first and second displays and is surrounded by the seal.