Patent ID: 11863914
Assignee: OSRAM OPTO SEMICONDUCTORS GMBH
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G  B | IPC H

Claim 9:
10. A projection apparatus comprising:
a light source for emitting light with an initial spectral distribution,
an optical element, and
a projection surface,
wherein
the optical element is arranged in a beam path of the light emitted from the light source between the light source and the projection surface,
the optical element comprises a number of pixels,
the pixels of the optical element are each configured to convert light with the initial spectral distribution into light with a predetermined final spectral distribution different from the initial spectral distribution,
the pixels of the optical element each comprise a transmission element,
the transmission element comprises two electrical contacts for applying an electrical voltage,
the transmission element comprises an electrically insulating material between two metallic layers,
one metallic layer each is electrically conductively connected to an electrical contact of each pixel, and
the electrically insulating material has a refractive index that changes according to a function of the applied voltage.