Variable emission period for scanned-beam display
US10313645B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2018 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Jan 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanned-beam display comprises an emitter configured to emit light of controlled variable intensity, a beam-steering optic configured to steer the light to a controlled variable beam position, and a drive circuit coupled operatively to the emitter and beam-steering optic. The drive circuit is configured to apply a signal to the beam-steering optic to move the beam position along a path of pixel positions, the path including a first pixel position at the center of the field-of-view and a second pixel position at the periphery of the field-of-view. The drive circuit is further configured to drive a series of current pulses through the emitter in synchronicity with the signal, to illuminate the first pixel position during a first interval and to equivalently illuminate the second pixel position during a second interval, the emitter being driven at a higher duty cycle during the second interval than during the first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.