Optical keyswitch
US11018667B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2019 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Mar 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/9653
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An optical keyswitch includes a keycap, a supporting mechanism having a protrusion disposed under the keycap to support the keycap to move downward or upward, and a switch module including a circuit board, an emitter, and a receiver. The emitter and the receiver are electrically connected to the circuit board. The emitter emits an optical signal to the receiver. When the keycap is not pressed, the receiver receives the optical signal of a first intensity. When the keycap is pressed, the protrusion moves along with the keycap, and the protrusion changes the optical signal received by the receiver to have a second intensity different from the first intensity, so the switch module is triggered to generate a triggering signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.