Projector

Patent metadata

Field	Value
Publication number	US-11549893-B2
Application number	US-202017131125-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Dec 26, 2019
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A projector includes a first detection section which has a first sensor provided to an enclosure, and has a first detection axis as a central axis of a first detection range as a detection range of the first sensor, and a second detection section which has a second sensor provided to the enclosure, and has a second detection axis as a central axis of a second detection range as a detection range of the second sensor, and a distance of the first detection range from the first sensor in the first detection axis of the first detection section is longer than a distance of the second detection range from the second sensor in the second detection axis of the second detection section.

First claim

What is claimed is:

1. A projector comprising:
an illumination section configured to emit light;
a light modulation section configured to modulate the light from the illumination section in accordance with image information;
a projection section configured to project the light from the light modulation section;
an enclosure configured to house the illumination section, the light modulation section, and the projection section;
a first detection section which has a first sensor provided to the enclosure, and has a first detection axis as a central axis of a first detection range as a detection range of the first sensor; and
a second detection section which has a second sensor provided to the enclosure, and has a second detection axis as a central axis of a second detection range as a detection range of the second sensor, wherein
a distance of the first detection range from the first sensor in the first detection axis of the first detection section is longer than a distance of the second detection range from the second sensor in the second detection axis of the second detection section.

2. The projector according to claim 1 , wherein
the first sensor is disposed so that the first detection axis extends along a projection direction of the light by the projection section.

3. The projector according to claim 1 , wherein
the detection range of the first sensor is set to be outside a projection range by the projection section.

4. The projector according to claim 3 , wherein
the detection range of the second sensor is set to be outside the projection range by the projection section, and outside the detection range of the first sensor.

5. The projector according to claim 1 , wherein
the enclosure has a passage opening through which the light emitted from the projection section passes,
the second detection section has a plurality of the second sensors, and
the plurality of second sensors is disposed around the passage opening.

6. The projector according to claim 5 , wherein
a direction of the second detection axis of one of the second sensors is different from a direction of the second detection axis of another of the second sensors.

7. The projector according to claim 5 , wherein
one of the second sensors is located on an opposite side to another of the second sensors across the passage opening.

8. The projector according to claim 7 , wherein
the enclosure has a first surface having a recessed part,
the recessed part includes
a first tilted part in which the passage opening is located, and which is tilted with respect to the first surface, and
a second tilted part which is opposed to the first tilted part, and is tilted with respect to the first tilted part,

the first sensor and the one of the second sensors are located in the first tilted part, and
the another of the second sensors is located in the second tilted part.

9. The projector according to claim 1 , wherein
the first sensor is a sensor configured to detect a presence of a human, and
the second sensor is a sensor configured to detect a presence of a foreign matter located near the passage opening.

10. The projector according to claim 1 , wherein
the first sensor is a pyroelectric sensor, and
the second sensor is an infrared sensor.

Assignees

• Seiko Epson Corp

Inventors

• Yanagihara Hirokazu

Classifications

• G01J5/0025

  Living bodies (ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00) · CPC title

• H04N9/3141

  Constructional details thereof (details not peculiar to the presence of an electronic spatial light modulator G03B21/14) · CPC title

• G03B21/14

  Details · CPC title

• G01N21/94 Primary

  Investigating contamination, e.g. dust (G01N21/85 takes precedence) · CPC title

• H04N9/3194 Primary

  including sensor feedback · CPC title