Projector with flexible printed circuit board for light source

Patent metadata

Field	Value
Publication number	US-9442353-B2
Application number	US-201214124552-A
Country	US
Kind code	B2
Filing date	Jun 13, 2012
Priority date	Jun 22, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A projector ( 1 ) includes a light source device ( 2 ), a light modulating device ( 5 ) configured to modulate a light beam emitted from the light source device, a projection optical device ( 7 ) configured to project the light beam modulated by the light modulating device, and a flexible printed circuit board ( 6 ), one end of which is connected to the light modulating device ( 5 ). The light source device ( 2 ) includes a light emitting device mounted on the flexible printed circuit board ( 6 ). The flexible printed circuit board is bent, whereby the light source device is disposed in an emission position where the light source device ( 2 ) emits the light beam to the light modulating device ( 5 ).

First claim

What is claimed is:

1. A projector comprising:
a light source device,
a light modulating device configured to modulate a light beam emitted from the light source device,
a projection optical device configured to project the light beam modulated by the light modulating device,
a housing in which the light source device, the light modulating device, and the projection optical device are housed,
a flexible printed circuit board, one end of which is directly connected to the light modulating device, wherein
a positioning for positioning the light source device in the emission position is formed on an outer surface of the housing,
the flexible printed circuit board includes a positioning hole in which the positioning protrusion is fitted, and the positioning protrusion fits in the positioning hole to position the light source device in the emission position,
an insert-through section for drawing around the flexible printed circuit board to an outside of the housing is formed in the housing,
the light source device includes a light emitting device mounted on the flexible printed circuit board, and the flexible printed circuit board is bent, whereby the light source device is disposed in an emission position where the light source device emits the light beam to the light modulating device, and
the flexible printed circuit board is drawn around to the outside of the housing via the insert-through section, and a portion between the positioning hole and the one end is bent along the outer surface of the housing.

2. The projector according to claim 1 , wherein the positioning protrusion is formed on an outer surface of the housing,
in the housing, a screw hole in which a screw is screwed and an insert-through section for drawing around the flexible printed circuit board to an outside of the housing are formed,
the flexible printed circuit board includes a first fixing hole through which the screw is inserted, and
the projector comprises a second fixing hole through which the screw is inserted and a holding member connected to the housing by the screw and configured to hold a part of the flexible printed circuit board between the holding member and the outer surface of the housing.

3. The projector according to claim 2 , wherein the holding member is made of a thermally conductive material and is connected to the light source device via the flexible printed circuit board to be capable of transmitting heat.

4. The projector according to claim 1 , wherein the flexible printed circuit board is formed such that a width dimension of a portion where the light source device is mounted is larger than a width dimension of the other portions.

5. A projector including a light source device configured to mount on a flexible printed circuit board, a light modulating device configured to modulate a light beam emitted from the light source device, a projection optical device configured to project the light beam modulated by the light modulating device, and a housing in which the light source device, the light modulating device, and the projection optical device are housed, wherein
the housing includes a first housing section and a second housing section formed separate from each other and combined with each other, and
the light modulating device is disposed in a connecting position of the first housing section and the second housing section.

6. The projector according to claim 5 , further comprising a connecting member configured to integrate the first housing section and the second housing section.

7. The projector according to claim 5 , wherein
the housing is formed to have a substantially rectangular parallelepiped shape by combining the first housing section and the second housing section,
the connecting member includes:
a connecting member body attached to a first side surface of the housing to extend over the connecting position; and
a reinforcing section configured to project from the connecting member body and disposed to be opposed to a second side surface different from the first side surface in the housing to extend over the connecting position.

8. The projector according to claim 5 , wherein the insert-through section is formed on the second side surface.

9. The projector according to claim 5 , wherein
on an outer surface of the housing, a positioning protrusion for positioning the light source device in the emission position and a screw hole in which a screw is fitted are formed,
the flexible printed circuit board includes a first fixing hole through which the screw is inserted and a positioning hole in which the positioning protrusion is fitted, and the positioning protrusion is fitted in the positioning hole to position the light source device in the emission position, and
the connecting member includes a second fixing hole through which the screw is inserted and a holding member connected to the housing by the screw and configured to hold a part of the flexible printed circuit board between the holding member and the outer surface of the housing.

Assignees

• Kadotani Norikazu
• Hashimoto Akira
• Kobayashi Hiroshi
• Nagatani Kaname
• Nakamura Norio
• Seiko Epson Corp

Inventors

• Kadotani Norikazu
• Hashimoto Akira
• Kobayashi Hiroshi
• Nagatani Kaname
• Nakamura Norio

Classifications

• G03B21/20 Primary

  Lamp housings · CPC title

• F21V19/003

  Fastening of light source holders, e.g. of circuit boards or substrates holding light sources · CPC title

• G03B21/2033 Primary

  LED or laser light sources · CPC title

• H05K2201/10106

  Light emitting diode [LED] · CPC title

• H04N9/315

  Modulator illumination systems (general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20) · CPC title