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US 2015/0177600 A1Published application
Projection Display Apparatus
AssigneeNEC Display Solutions, Ltd.
InventorMasateru Matsubara
Life of this patent
Estimating the term…
Abstract
In a projection display apparatus, laser beams that are emitted from light sources and that are reflected and two-dimensionally scanned by scanning mirrors are modulated by a light bulb, and are then magnified through a projection lens to be projected. The F numbers of the scanning mirrors are smaller than that of the projection lens. The irradiation regions of the laser beams that are reflected by the scanning mirrors with respect to the light bulb are reduced by a lens.
Claims4
A projection display apparatus, comprising:
- light sources that emit laser beams;
- scanning mirrors configured to reflect and two-dimensionally scan the laser beams from the light sources;
- a light bulb configured to modulate the laser beams from the scanning mirrors;
- and
- a projection lens that magnifies and projects the laser beams from the light bulb;
- wherein F numbers of the scanning mirrors are smaller than that of the projection lens, and the projection display apparatus further comprises a lens configured to reduce irradiation regions of the laser beams that are reflected by the scanning mirrors with respect to the light bulb.
3 more elements
Dependencies are inferred from the claim text.