# US 2021/0275062 A1 · Wearable photoluminescence sensor and remote sensing apparatus comprising same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0275062 A1 - Document ID: US20210275062A1 - Status: Published application - Kind: A1 - Application number: 17/270,815 - Filed: 2019-08-23 - Published: 2021-09-09 - Earliest claimed: 2018-08-23 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Jin-Woo PARK; Changjin LIM; Soyeon LEE; Su Seok CHOI; Kiseok CHANG; Jeong Min MOON; Soon Shin JUNG; Sungpil RYU; Jihwan JUNG - Web page: https://patentgrep.com/patent/US20210275062A1 ## CPC - A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters - A61B 5/14552: {Details of sensors specially adapted therefor} - A61B 5/6801: {specially adapted to be attached to or worn on the body surface} - G08B 6/00: Tactile signalling systems, e.g. tactile personal calling systems - H10F 30/20: the devices having potential barriers, e.g. phototransistors - H10F 55/10: wherein the radiation-sensitive semiconductor devices control the electric light source, e.g. image converters, image amplifiers or image storage devices - H10F 77/169: Thin semiconductor films on metallic or insulating substrates - H10F 77/30: Coatings (arrangements for preventing damage to photovoltaic cells caused by corpuscular radiation H10F77/80) - H10F 77/40: Optical elements or arrangements (surface textures H10F77/70) - H10H 20/855: Optical field-shaping means, e.g. lenses - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A wearable photoluminescence sensor, which is portable and has improved sensitivity and accuracy, and a remote sensing apparatus comprising same, the disclosed wearable photoluminescence sensor includes a reflective support and a semipermeable filter disposed over and under translucent photodiodes, thus allows light of a second wavelength band, having the photoluminescence properties of getting lost or passing through, to be reflected again and thus maximally utilized, and thereby allows sensitivity and accuracy to be improved. ## Claims ### Claim 1 A wearable photoluminescence sensor comprising: a sensing film; a light-emitting element disposed on the sensing film; a translucent photo-diode disposed above and spaced apart from the light-emitting element and at least partially and vertically non-overlapping with the light-emitting element; a transflective filter disposed between the light-emitting element and the translucent photo-diode; and a reflective support disposed above and spaced apart from the translucent photo-diode. ### Claim 2 (depends on 1) The wearable photoluminescence sensor of claim 1, wherein the light-emitting element includes a light emitting diode (LED) or an organic electroluminescence element emitting light in one of red, green, and blue wavelength bands. ### Claim 3 (depends on 1) The wearable photoluminescence sensor of claim 1, wherein the sensing film contains at least one of a rhodamine-based organic coloring agent including rhodamine 6G, rhodamine 110, rhodamine 700, sulforhodamine B, and sulforhodamine 101, and umbelliferone. ### Claim 4 (depends on 1) The wearable photoluminescence sensor of claim 1, wherein the reflective support includes: a first support frame extending in a vertical direction; a second support frame connected to the first support frame and covering a top of the translucent photo-diode; and a reflective layer disposed on the second support frame for re-reflecting light emitted from the sensing film to the translucent photo-diode. ### Claim 5 (depends on 4) The wearable photoluminescence sensor of claim 4, wherein each of the first and second support frames is made of at least one of polyimide (PI), polyethylene terephthalate (PET), polydimethylsiloxane (PDMS), polymethyl methacrylate (PMMA), poly(N,N-dimethylacrylamide) (PDMA), polypropylene (PP), polyamide imide, polycarbonate (PC), polyarylate, polyetherimide, polyethylenenaphthalate, and polyphthalamide. ### Claim 6 (depends on 4) The wearable photoluminescence sensor of claim 4, wherein the reflective layer is made of at least one of Au, Cu, Ag, Al, Pd, Pt, Ru and Rh. ### Claim 7 (depends on 1) The wearable photoluminescence sensor of claim 1, wherein the light-emitting element emits light of a first wavelength band, and wherein the sensing film absorbs the light of the first wavelength band, and emits light of a second wavelength band higher than the first wavelength band. ### Claim 8 (depends on 7) The wearable photoluminescence sensor of claim 7, wherein the transflective filter allows only the light of the second wavelength band emitted from the sensing film to selectively pass therethrough. ### Claim 9 (depends on 8) The wearable photoluminescence sensor of claim 8, wherein the transflective filter includes a bandpass filter. ### Claim 10 (depends on 1) The wearable photoluminescence sensor of claim 1, wherein the translucent photo-diode includes: an insulating substrate; a transparent electrode disposed on the substrate; a hole transport layer disposed on the transparent electrode; a light absorbing layer disposed on the hole transport layer; an electron transport layer disposed on the light absorbing layer; and a translucent electrode disposed on the electron transport layer. ### Claim 11 (depends on 10) The wearable photoluminescence sensor of claim 10, wherein the translucent electrode includes a nanowire having a thickness of 50 to 150 nm. ### Claim 12 (depends on 11) The wearable photoluminescence sensor of claim 11, wherein the translucent electrode includes a metal material having a plurality of slits defined therein and arranged by a regular spacing. ### Claim 13 A wearable remote sensing device comprising: a sensor attached to a living body to measure a biological state thereof; a transmitter for wirelessly transmitting the biological state measured by the sensor to a remote location; a receiver for wirelessly receiving an alarm from the remote location; a power supply for supplying power to each of the sensor, the transmitter, and the receiver; and a controller configured to transmit information measured by the sensor to the transmitter, and to inform a user of the alarm received by the receiver and information on a power amount of the power supply, wherein the sensor includes: a sensing film; a light-emitting element disposed on the sensing film; a translucent photo-diode disposed above and spaced apart from the light-emitting element and at least partially and vertically non-overlapping with the light-emitting element; a transflective filter disposed between the light-emitting element and the translucent photo-diode; and a reflective support disposed above and spaced apart from the translucent photo-diode. ### Claim 14 (depends on 13) The device of claim 13, wherein the device further comprises a vibration motor for generating the alarm. ### Claim 15 (depends on 13) The device of claim 13, wherein the light-emitting element emits light of a first wavelength band, and wherein the sensing film absorbs the light of the first wavelength band, and emits light of a second wavelength band higher than the first wavelength band. ### Claim 16 (depends on 15) The device of claim 15, wherein the transflective filter allows only the light of the second wavelength band emitted from the sensing film to selectively pass therethrough. ### Claim 17 (depends on 16) The device of claim 16, wherein the transflective filter includes a bandpass filter.