Indicator detection method and projection system
US11543920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2022 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Mar 29, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04106
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An indicator detection method includes operating in a first mode and operating in a second mode. The first mode includes detecting a position of a first indicator on a operation surface by detecting first light emitted by the first indicator, emitting second light by a light emitting device, and detecting a position of a second indicator on the operation surface by detecting reflected light of the second light reflected by the second indicator. The second mode includes reducing a light amount of the second light when it is determined that the first indicator is in contact with the operation surface, and detecting the position of the first indicator on the operation surface by detecting the first light in a state where the light amount of the second light is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.