Light-based sensor apparatus and associated methods
US11329186B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2016 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | May 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/60
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus (201) comprises a light emitter (202) and a photodetector (203) formed on a single fluid-permeable substrate (206) such that the photodetector (203) is able to detect light emitted by the light emitter (202) after interaction of the light with a user of the apparatus (201). The photodetector comprises a channel member (207) which may be made from graphene, respective source and drain electrodes (208, 209), a layer of photosensitive material (210) configured to vary the flow of electrical current through the channel member (207) on exposure to light from the light emitter (202), and a gate electrode (211). The apparatus (201) further comprises a layer of fluid-impermeable dielectric material (212) configured to inhibit a flow of electrical current between the channel member (207) and the gate electrode (211) of the photodetector (203) to enable the electrical conductance of the channel member (207) to be controlled by a voltage applied to the gate electrode (211) and to inhibit exposure of the light emitter (202) to fluid which has permeated through the fluid-permeable substrate (206). The layer of fluid-impermeable dielectric material (212) allows resilient substrates …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.