# US 11,906,438 B2 · System and method for optical state determination > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,438 B2 - Document ID: US11906438B2 - Status: Granted - Kind: B2 - Application number: 18/128,101 - Filed: 2023-03-29 - Published: 2023-07-27 - Granted: 2024-02-20 - Earliest claimed: 2019-07-19 - Assignees: Dell Products L.P. - Applicants: Dell Products L.P. - Inventors: Steven Embleton; Ben John Sy; Eric Michael Tunks - Web page: https://patentgrep.com/patent/US11906438B2 ## CPC - G01N 21/8803: {Visual inspection (measuring projectors G01B9/08)} - G06F 1/182: {with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]} - G06F 1/1656: {Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories (mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203)} - H04B 15/02: Reducing interference from electric apparatus by means located at or near the interfering apparatus - H05K 9/0009: {with provisions to reduce EMI leakage through the joining parts} - H05K 9/0018: {with provisions to reduce aperture leakages in walls, e.g. terminals, connectors, cables} - H05K 9/0041: {Ventilation panels having provisions for screening} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04B: TRANSMISSION - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A method for managing electromagnetic interference (EMI) includes: obtaining electromagnetic radiation from a device, disposed in an internal volume of a data processing device, while the internal volume is EMI isolated and after the device performs a function; making a determination that the device disposed in the internal volume has an optical state associated with the electromagnetic radiation; and performing a first action set based on the determination, in which the electromagnetic radiation is obtained through a boundary of the internal volume. ## Claims ### Claim 1 A method for managing electromagnetic interference (EMI), comprising: obtaining electromagnetic radiation from a device, disposed in an internal volume of a data processing device, while the internal volume is EMI isolated and after the device performs a function; making a determination that the device disposed in the internal volume has an optical state associated with the electromagnetic radiation; and performing a first action set based on the determination, wherein the electromagnetic radiation is obtained through a boundary of the internal volume. ### Claim 2 (depends on 1) The method of claim 1, further comprising: obtaining second electromagnetic radiation from the device, disposed in the internal volume of the data processing device, while the internal volume is EMI isolated and after the device performs a second function; make a second determination that the device disposed in the internal volume has a second optical state associated with the second electromagnetic radiation; and performing a second action set based on the second determination, wherein the second electromagnetic radiation is obtained through the boundary of the internal volume. ### Claim 3 (depends on 1) The method of claim 1, wherein the optical state is associated with a pattern of light emitted by the device. ### Claim 4 (depends on 3) The method of claim 3, wherein the pattern of the light is emitted by a display of the device. ### Claim 5 (depends on 3) The method of claim 3, wherein the optical state is associated with performance of a function of the device. ### Claim 6 (depends on 1) The method of claim 1, wherein the optical state is obtained using an image of the device provided by an optical state detector. ### Claim 7 (depends on 6) The method of claim 6, wherein the image comprises a representation of a display of the device. ### Claim 8 (depends on 6) The method of claim 6, wherein the optical state detector comprises: an optical collector; and a controller adapted to receive the electromagnetic radiation via the optical collector. ### Claim 9 (depends on 8) The method of claim 8, wherein the optical collector comprises: an optical pickup adapted to obtain the electromagnetic radiation; and an extension adapted to: traverse a boundary of the internal volume; and suppress transmission of EMI through the boundary. ### Claim 10 (depends on 9) The method of claim 9, wherein the extension does not comprise an electrically conductive material. ### Claim 11 (depends on 9) The method of claim 9, wherein the extension does not comprise metal. ### Claim 12 (depends on 9) The method of claim 9, wherein the extension comprises an optical fiber. ### Claim 13 (depends on 12) The method of claim 12, wherein the optical fiber is operably coupled to the optical pickup and the controller. ### Claim 14 A non-transitory computer readable medium comprising instructions that when executed by a data processing device cause the data processing device to perform a method for managing electromagnetic interference (EMI), the method comprising: obtaining electromagnetic radiation from a device, disposed in an internal volume of a data processing device, while the internal volume is EMI isolated and after the device performs a function; making a determination that the device disposed in the internal volume has an optical state associated with the electromagnetic radiation; and performing a first action set based on the determination, wherein the electromagnetic radiation is obtained through a boundary of the internal volume. ### Claim 15 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the method further comprising: obtaining second electromagnetic radiation from the device, disposed in the internal volume of the data processing device, while the internal volume is EMI isolated and after the device performs a second function; make a second determination that the device disposed in the internal volume has a second optical state associated with the second electromagnetic radiation; and performing a second action set based on the second determination, wherein the second electromagnetic radiation is obtained through the boundary of the internal volume, wherein the first action set comprises a first set of actions, the second action set comprises a second set of actions, and the first set of actions is different than the second set of actions. ### Claim 16 (depends on 14) The method of claim 14, wherein the optical state is associated with a pattern of light emitted by the device. ### Claim 17 (depends on 16) The method of claim 16, wherein the pattern of the light is emitted by a display of the device. ### Claim 18 (depends on 16) The method of claim 16, wherein the optical state is associated with performance of a function of the device. ### Claim 19 (depends on 14) The method of claim 14, wherein the optical state is obtained using an image of the device provided by an optical state detector. ### Claim 20 (depends on 19) The method of claim 19, wherein the image comprises a representation of a display of the device.