Patent · US Active

Method and apparatus for driving light emitting elements for projection of images

US9368071B2 · kind B2 · utility

3Cited by

7References

15Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Rob Otte · Nieuwdorp, NL
Carsten Deppe · Aachen, DE
Oscar Deurloo · Veldhoven, NL

Key dates

Filing date	May 30, 2008
Grant date	Jun 14, 2016
Priority date	—
Expiry date	Jul 29, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG09G2310/0235
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A light source sequentially emits lights generated by at least three light emitting elements each emitting a different primary color to generate an image. Each light emitting element has a duty cycle in a lighting period, which may be an image frame period. A sequence scheme is provided for alternatingly driving different ones of the light emitting elements. The light emitting elements are driven in accordance with the sequence scheme at least two times in the lighting period, while maintaining the duty cycle for each light emitting element. In the sequence scheme, at least one light emitting element having the highest temperature sensitivity of all light emitting elements is driven more times than another one.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.