US 10,122,977 B2Granted

Projector including first and second optical systems

AssigneeNEC Display Solutions, Ltd.

InventorEisaku Shouji

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Abstract

A projector includes: a light source that emits light of a first color and a second color; a first image formation element that forms a first image light of the first color; a second image formation element that forms a second image light of the second color; a projection lens that projects the first image light and the second image light to the outside; a first optical system that guides light of the first color that is emitted from the light source to the first image formation element, and guides light of the first color from the first image formation element to the projection lens; and a second optical system that guides light of the second color that is emitted from the light source to the second image formation element, and guides light of the second color from the second image formation element to the projection lens.

Claims11

Dependent claims

A projector comprising:

a light source that emits light of a first color and a second color;
a first image formation element that forms a first image light of said first color;
a second image formation element that forms a second image light of said second color;
a projection lens that projects said first image light and said second image light to the outside;
a first optical system that guides light of said first color that is emitted from said light source to said first image formation element, and guides light of said first color from said first image formation element to said projection lens;
and
a second optical system that guides light of said second color that is emitted from said light source to said second image formation element, and guides light of said second color from said second image formation element to said projection lens;
wherein said first optical system has a convex lens between said first image formation element and said projection lens, and
wherein an f-number of said first optical system is greater than an f-number of said second optical system.

6 more elements

A projector comprising:

a first light source that emits light of a first color;
a second light source that emits light of a second color;
image forming units that adjust the intensity of light emitted from said first light source and said second light source on a per-pixel basis and form image light;
a projection lens that projects image light that is formed in said image forming units to the outside;
a first optical system that guides light of the first color that is emitted from said first light source to said projection lens, and has a first lens that is arranged between said first light source and said projection lens;
and
a second optical system that guides light of the second color that is emitted from said second light source to said projection lens, and has a second lens that is arranged between said second light source and said projection lens;
wherein a curvature of said first lens and a curvature of said second lens are set such that a f-number of said first optical system is greater than a f-number of said second optical system.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/615,726Filed 6 Jun 2017 · continuation
Published: US 2017/0272714 A121 Sep 2017
Granted: 6 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

H04N 9/3158
Modulator illumination systems: for controlling the spectrum
G02B 27/102
For splitting or combining different wavelengths: for generating a colour image from monochromatic image signal sources
G02B 27/1033
For use with reflective spatial light modulators: having a single light modulator for all colour channels
G02B 27/126
Operating by refraction only: the splitting element being a prism or prismatic array, including systems based on total internal reflection

Family

PCT/JP2013/066342Parent of this continuation · filed 13 Jun 2013
US 2017/0272714 A1Pre-grant publication · published 21 Sep 2017
Application14/787,741Parent of this continuation
US 9,712,794 B2Parent of this continuation
US 2016/0088274 A1Published application
US 10,122,977 B2This patent

From the US filing history. Foreign family members aren’t listed.

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