Optical proximity sensor system
US12126337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2020 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Jan 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96031
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a display screen, and an optical proximity sensor module disposed behind the display screen. The optical proximity sensor module includes a light emitter operable to produce light having a wavelength for transmission through the display screen toward a target object, and a light sensor operable to sense light reflected by the target object and having the wavelength. The optical proximity sensor module can includes means for reducing a maximum energy density of a light beam produced by the light emitter. The means for reducing the maximum energy density of the light beam is disposed between the light emitter and the display screen so as to intersect the light beam produced by the light emitter. In some cases, there are multiple light emitters collectively operable to provide sufficient optical energy for proximity sensing without producing a visible spot on the display screen. These and other techniques can help reduce or eliminate display screen distortion caused by energy from the light emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.