JP2009086200A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of obtaining a good light receiving state even when an operation signal is sent to the projector from an oblique direction.
A projector includes a light receiving device that receives an operation signal and an exterior housing that houses the light receiving device. A light receiving opening 232 is formed at a corner where the front portion 233 and the upper surface portion 211 of the outer casing intersect. The light receiving device 10 is provided in the light receiving opening 232, and the light receiving direction B is inclined with respect to the front surface portion 233 and the upper surface portion 211 in which the light receiving opening 232 is formed, and the light receiving opening 232 is formed in the light receiving opening 232. Through the outer casing 2. According to such a configuration, a good light receiving state can be obtained even when the operation signal is sent from the upper front side of the projector.
[Selection] Figure 5

Description

  The present invention relates to a projector.

Conventionally, an image projection device that modulates light emitted from a light source according to input image information to form image light, projects the formed image light in an enlarged manner, and an exterior housing that houses the image projection device There is known a projector including As such a projector, a projector having a light receiving device that receives an operation signal for operating the image projection device is known (for example, see Patent Document 1).
In the projector described in Patent Document 1, a remote control light receiving window is formed in the front case. A remote control light receiving module (light receiving device) is disposed inside the remote control light receiving window.

JP 2006-301227 A

Here, when a projector is installed and used on an installation surface such as a desk, an operation signal is often transmitted from an obliquely upper side of the projector depending on the positional relationship between the projector and the user of the projector. Further, when the projector is used while being hung from the ceiling, the operation signal is often transmitted from an obliquely lower side of the projector.
However, in the projector described in Patent Document 1, the receiving device closes the opening formed in the substantially central portion of the front case with a light receiving window having one planar light receiving portion, and through the light receiving window. Since the operation signal is received, a good light receiving state can be obtained when the operation signal is introduced from the front with respect to the light receiving window, but when the operation signal is introduced obliquely with respect to the light receiving window. There is a problem that a good light receiving state may not be obtained.

  An object of the present invention is to provide a projector capable of obtaining a good light receiving state even when an operation signal is sent obliquely to the projector.

  The projector of the present invention modulates light emitted from a light source according to input image information to form image light, enlarges and projects the formed image light, and operates the image projection apparatus A projector that includes a light receiving device that receives an operation signal for performing an operation signal, and an exterior housing that houses the image projection device and the receiving device, the exterior housing having a plurality of surfaces that intersect each other, A light receiving opening for accommodating the light receiving device is formed at a corner where the surfaces intersect, the light receiving device is provided in the light receiving opening, and the light receiving direction of the light receiving device is The light receiving opening is inclined with respect to each surface on which the light receiving opening is formed, and is directed toward the outside of the exterior casing through the light receiving opening.

Here, the light receiving device generally has directivity, and receives an operation signal introduced from a predetermined angle range (hereinafter referred to as a light receiving range) with a predetermined direction (light receiving direction) as a center. Can do.
Therefore, according to such a configuration, the light receiving direction of the light receiving device is inclined with respect to each surface on which the light receiving opening is formed and is directed to the outside of the exterior housing through the light receiving opening. Therefore, a good light receiving state can be obtained even when the operation signal is sent obliquely to the projector. For example, in a projector including a substantially rectangular parallelepiped outer casing, a light receiving opening is formed at a corner where the front and upper surfaces of the outer casing intersect, and the light receiving device is arranged with respect to the upper and front surfaces of the outer casing. Providing a good light receiving state even when an operation signal is sent from the upper front side of the projector by providing it in the light receiving opening so as to be inclined and in the light receiving direction toward the outside of the exterior housing be able to.

  In the present invention, the light receiving window includes a light receiving window that closes the light receiving opening and introduces the operation signal into the light receiving opening, and the light receiving window extends along each surface on which the light receiving opening is formed. It is preferable to have a plurality of light receiving portions provided.

Here, for example, as described above, when the light receiving opening is formed at the corner where the front surface and the upper surface of the exterior housing intersect, the light receiving opening is provided in the light receiving window having one planar light receiving portion. When the unit is closed, an operation signal transmitted from the upper front side of the projector is introduced into the light receiving unit, so that a good light receiving state can be obtained. However, since the operation signal sent from the upper rear side of the projector may not be introduced into the light receiving unit, a good light receiving state cannot be obtained.
On the other hand, according to the present invention, the light receiving window has a plurality of light receiving portions provided along the respective surfaces on which the light receiving openings are formed, and is therefore sent from the rear upper side of the projector. The operation signal is introduced into the light receiving opening through the light receiving portion provided along the upper surface of the outer casing, and a part of the operation signal is reflected at the light receiving portion provided along the front surface of the outer casing. The light is received at. Therefore, it is possible to obtain a good light receiving state even with respect to the operation signal sent from the upper rear side of the projector, and thus it is possible to extend the light receiving range of the light receiving device.

  In the present invention, the light receiving opening is inclined with respect to each surface on which the light receiving opening is formed, and the direction toward the outside of the exterior casing is determined through the light receiving opening. An inclined surface that is a linear direction is provided, and the light receiving device includes a substrate that is fixed to the inclined surface, and a light receiving element that is attached to the substrate and receives the operation signal, and the light receiving direction of the light receiving element is It is preferable that the direction substantially coincides with the normal direction of the inclined surface.

  According to such a configuration, the light receiving direction of the light receiving device is inclined with respect to each surface on which the light receiving opening is formed, and the light receiving opening is simply formed by simply fixing the substrate to the inclined surface. The direction toward the outside of the exterior casing can be made through the unit, and a good light receiving state can be obtained even when the operation signal is sent obliquely to the projector.

In the present invention, the light receiving opening is formed at a corner where two surfaces of the exterior housing intersect, and the light receiving window intersects with each light receiving portion and enters the light receiving opening. It is preferable to have a reflecting portion that extends.
Here, the reflection part should just reflect at least one part of the incident light.

  According to such a configuration, for example, as described above, when the light receiving opening is formed at a corner where the front and top surfaces of the exterior casing intersect, the operation signal sent from the upper side of the side surface of the projector Is introduced into a light receiving portion provided along the front or top surface of the exterior casing, and intersects with each light receiving portion, and at least part of the light is reflected at the reflecting portion extending toward the light receiving opening. Light is received by the device. Therefore, it is possible to obtain a good light receiving state with respect to the operation signal sent from the upper side of the side surface of the projector, and thus it is possible to extend the light receiving range of the light receiving device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[External configuration of the projector]
FIG. 1 is a perspective view of a projector 1 according to this embodiment as viewed from the front side.
The projector 1 according to the present embodiment forms image light according to image information input from an external device or the like, and projects the image light on a projection surface such as a screen. As shown in FIG. 1, the projector 1 includes an exterior housing 2 and an apparatus main body 3 (not shown in FIG. 1) housed in the exterior housing 2.

[Configuration of exterior casing]
The exterior housing 2 has a substantially rectangular parallelepiped shape as a whole, and is formed of a synthetic resin in this embodiment. The exterior housing 2 includes an upper case 21 that forms an upper surface, a lower case 22 that forms a lower surface, and a front case 23 that forms a front surface (a side on which image light is projected by a projection lens 46 described later). ing.
Among these, on the bottom surface of the lower case 22, although not shown in detail, a leg portion for installing the projector 1 is projected on the installation surface.

The upper case 21 is formed in a substantially U shape in a longitudinal sectional view having an upper surface portion 211, left and right side surface portions 212, 213 and a back surface portion 214 that are substantially suspended from the upper surface portion 211.
A plurality of openings 2111 are formed at substantially the center of the upper surface portion 211, and a plurality of keys 2112 disposed on the operation panel for operating the projector 1 are exposed through the openings 2111. Examples of such a key 2112 include a power key for turning on / off the power of the projector 1 and a direction key and a determination key used for adjusting keystone distortion and selecting items on a menu screen.

An opening 2113 and a bulging portion 2114 are formed on the front side of the upper surface portion 211 (the side close to the front case 23). A projection lens 46 is provided inside the exterior housing 2 corresponding to the region where the opening 2113 and the bulging portion 2114 are formed, and zoom and focus provided on the projection lens 46 via the opening 2113. The adjustment knob 463 is exposed. The bulging portion 2114 is formed so as to bulge out of the plane depending on the shape of the projection lens 46.
Further, a substantially rectangular opening 2115 for replacing a light source device 411 described later is formed on the back surface side of the upper surface portion 211, and the opening 2115 is covered with a cover 2116.

Of the side portions 212 and 213, the side portion 212 located on the left side (left side in FIG. 1) when the projector 1 is viewed from the front side is provided with a slit-shaped first portion that exhausts the air inside the exterior housing 2 to the outside. One exhaust port 2121 and a substantially rectangular cutout 2122 are formed.
Among these, the exhaust portion 221 formed in the lower case 22 is fitted into the notch 2122 when the upper case 21 and the lower case 22 are combined. A slit-like second exhaust port 222 is formed in the exhaust unit 221, and the fan 63 (see FIG. 2) provided inside the exhaust unit 221 passes through the exhaust port 222 so that the interior of the exterior casing 2 is inside. Air is exhausted.
In addition, although not shown, the side surface 213 formed on the side opposite to the side surface 212 is formed with an air inlet for introducing air outside the exterior housing 2 into the inside.

  A substantially circular opening 231 for exposing the projection lens 46 is formed in the front case 23 on the side surface portion 213 side. In addition, a substantially rectangular light receiving opening 232 formed in combination with the upper case 21 is formed at a substantially upper center of the front case 23, and the light receiving opening 232 is covered with the light receiving window 11. . Inside the light receiving opening 232, a light receiving device 10 (see FIG. 4) that receives an infrared signal (operation signal) from a remote controller (not shown) is provided. The light receiving device 10 and the light receiving window 11 will be described in detail later.

[Configuration of the device body]
FIG. 2 is a perspective view showing the apparatus main body 3. In other words, FIG. 2 is a perspective view showing the projector 1 with the upper case 21 and the front case 23 removed from the state of FIG.
The apparatus main body 3 processes image information input from an external device or the like, forms and projects image light according to the image information, and is fixed to the lower case 22. As shown in FIG. 2, the device main body 3 includes an optical device 4, a power supply device 5, a cooling device 6, and a control device (not shown).
Among these, the power supply device 5 is arranged along the front surface, and after converting the commercial alternating current input from the outside into direct current, the power supply device 5 steps up and down to supply electric power to each electronic component constituting the projector 1. The power supply device 5 is covered with an electromagnetic shielding material 51 so that EMI (Electro Magnetic Interference) is taken.

The cooling device 6 cooled the optical device 4, the power supply device 5, and the control device using air introduced from the outside of the exterior housing 2 through an air inlet (not shown) of the side surface portion 213, and was used for cooling. The air is discharged to the outside through the first exhaust port 2121 and the second exhaust port 222. The cooling device 6 includes a duct 61 and a plurality of fans.
Among these, the duct 61 is connected to an air inlet (not shown) of the side surface portion 213, and cooling air introduced from the outside of the exterior housing 2 by a fan (not shown) disposed below the duct 61 will be described later. The air is blown to each liquid crystal panel 441 or the like of the optical device 4 to be operated.
The fan 62 provided in the vicinity of the power supply device 5 introduces a part of the cooling air inside the exterior housing 2, distributes the cooling air to the power supply device 5, and discharges it from the first exhaust port 2121.
The fan 63 connected to the exhaust unit 221 sucks air used for cooling the apparatus main body 3 and discharges it to the outside of the exterior casing 2 through the second exhaust port 222.

  The control device controls the operation of the projector 1. For example, the control device performs processing corresponding to the input operation on each key 2112 of the operation panel described above, processes image information to be input, and outputs an image signal corresponding to the image information to a liquid crystal (described later) of the optical device 4. Output to panel 441. Although not shown in detail, the control device is configured as a circuit board on which a CPU (Central Processing Unit) and the like are mounted, and is disposed above the optical device 4.

[Configuration of optical device]
FIG. 3 is a schematic diagram showing an optical system of the optical device 4.
The optical device 4 as an image projection device forms image light corresponding to the image signal input from the above-described control device, and projects the image light on the projection surface. The optical device 4 has a substantially L shape in plan view that extends along the back surface (back surface portion 214) of the exterior housing 2 and extends along the side surface (side surface portion 213) of the exterior housing 2. Have.
As shown in FIG. 3, the optical device 4 includes an illumination optical device 41, a color separation optical device 42, a relay optical device 43, an electro-optical device 44, and these devices 41 to 44 inside. The optical component outer casing 45 to be disposed and a projection lens 46 attached to the optical component outer casing 45 are provided.

The illumination optical device 41 includes a light source device 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415.
The light source device 411 includes a light source lamp 416 that emits a radial light beam, a reflector 417 that reflects the radiated light emitted from the light source lamp 416 and converges it at a predetermined position, and a light beam that is converged by the reflector 417 as illumination light. And a collimating concave lens 418 that is parallel to the axis A. As such a light source lamp 416, a halogen lamp, a metal halide lamp, a high-pressure mercury lamp, or the like can be used. In addition, the reflector 417 can be composed of an ellipsoidal reflector having a rotating ellipsoid, and can also be composed of a parabolic reflector having a rotating paraboloid. In this case, the collimating concave lens 418 can be omitted.

The first lens array 412 and the second lens array 413 have a configuration in which corresponding small lenses are arranged in a matrix, and the first lens array 412 converts the light beam incident from the light source device 411 into a plurality of partial light beams. The image is divided and imaged near the second lens array 413.
The second lens array 413 forms an image emitted from each small lens of the first lens array 412 together with the superimposing lens 415 located in the latter stage of the optical path in an image forming area of a liquid crystal panel 441 described later of the electro-optical device 44. Let
The polarization conversion element 414 converts each partial light beam incident from the second lens array 413 into substantially one type of linearly polarized light.

  The color separation optical device 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423, and a plurality of partial light beams emitted from the illumination optical device 41 are red (R), green (G), and blue (B). Separated into three color lights. Of the three color lights separated by the color separation optical device 42, green light and blue light are incident on the incident side polarizing plate 442 for green light and blue light via the condenser lens 419, respectively. The red light is incident on the incident-side polarizing plate 442 for red light through the relay optical device 43 and the condenser lens 419.

  The relay optical device 43 guides the red light separated by the color separation optical device 42 to a later-described red light liquid crystal panel 441R, and includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434. ing. The reason why such a relay optical device 43 is arranged on the optical path of red light is that the length of the optical path of red light is longer than the length of the optical path of other color light, so This is to prevent the decrease. The relay optical device 43 is configured to pass red light out of the three color lights, but is not limited thereto, and may be configured to pass blue light, for example.

  The electro-optical device 44 modulates an incident light beam according to an image signal to form image light related to a color image. The electro-optical device 44 includes three liquid crystal panels 441 (the red light side liquid crystal panel is 441R, the green light side liquid crystal panel is 441G, and the blue light side liquid crystal panel is 441B), and the optical path of each liquid crystal panel 441 It is configured to include three incident side polarizing plates 442 arranged on the front side, three emission side polarizing plates 443 arranged on the rear side of the optical path of each liquid crystal panel 441, and a cross dichroic prism 444.

The three incident-side polarizing plates 442 transmit only polarized light having substantially the same polarization direction as the polarization direction aligned by the polarization conversion element 414 out of each color light separated by the color separation optical device 42, and other light beams. Absorbs.
The three liquid crystal panels 441 have a configuration in which a liquid crystal, which is an electro-optical material, is hermetically sealed in a pair of transparent glass substrates, and the liquid crystal panel 441 is controlled by controlling the alignment state of the liquid crystal according to input image information. The polarization direction of the polarized light emitted from the side polarizing plate 442 is modulated.
The three exit-side polarizing plates 443 emit polarized light in a certain direction out of the light beams emitted through the liquid crystal panel 441 (for example, a light beam having a polarization axis orthogonal to the transmission axis of the light beam in the incident-side polarizing plate 442). Transmits and absorbs other light.

  The cross dichroic prism 444 forms a color image by synthesizing the modulated lights emitted from the emission-side polarizing plates 443. The cross dichroic prism 444 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. These dielectric multilayer films are emitted from the liquid crystal panel 441G and transmit color light via the emission side polarizing plate 443, and are emitted from the liquid crystal panels 441R and 441B and each color light via the emission side polarizing plate 443. To reflect. As a result, image light in which red light, green light and blue light are combined is formed.

The exterior casing 45 for optical components is a synthetic resin box-like member in which a predetermined illumination optical axis A is set and the above-described devices 41 to 44 are arranged at predetermined positions with respect to the illumination optical axis A.
The projection lens 46 is a projection optical device that enlarges and projects the image light formed by the electro-optical device 44. The projection lens 46 is configured as a combined lens in which a plurality of lenses (for example, a Fresnel lens 461 and the like positioned on the front end side in the projection direction) are housed in the lens barrel 462. In the present embodiment, the projector is a conventional projector. Even if the projection distance of the image light is short, the same projection area as that of the conventional projector can be realized. The diameter of the Fresnel lens 461 is larger than the diameter of the lens barrel 462 in order to realize the same projection area as before with a short projection distance. The lens barrel 462 of the projection lens 46 is provided with a knob 463 (see FIGS. 1 and 2) exposed through an opening 2113 (see FIG. 1), and the zoom and focus can be adjusted manually. .

[Configuration of light receiving device and light receiving window]
FIG. 4 is an exploded perspective view of the light receiving device 10, the light receiving window 11, the upper case 21, and the front case 23. FIG. 5 is a cross-sectional view showing the light receiving device 10 and the light receiving window 11.
As shown in FIG. 4, the front case 23 includes a front portion 233 in which the opening 231 described above is formed, and an upright portion 234 that stands from the edge of the front portion 233 toward the back portion 214 of the exterior housing 2. The notch 235 formed from the upright part 234 to the front part 233 and the inclined surface 236 provided inside the notch 235 are provided at a substantially central position in the longitudinal direction of the front part 233.

As shown in FIG. 5, a protrusion 235 </ b> A that protrudes toward the upper surface portion 211 is formed in the notch 235 along the longitudinal direction of the front portion 233.
The inclined surface 236 is provided so as to be inclined with respect to the front surface portion 233 and the upper surface portion 211 of the upper case 21 and the direction toward the outside of the exterior housing 2 through the light receiving opening 232 is a normal direction. As shown in FIG. 4, a screw hole 236A for fixing the light receiving device 10 is formed in the upper right portion when viewed from the front portion 233 side.

  The upper case 21 includes a notch 215 formed at a substantially central position in the longitudinal direction of the upper surface portion 211. The notch 215 is integrated with the notch 235 of the front case 23 in a state where the upper case 21 and the front case 23 are combined to form a light receiving opening 232. That is, in this embodiment, the light receiving opening 232 is formed at a corner where the front portion 233 and the upper surface portion 211 intersect.

As shown in FIGS. 4 and 5, the light receiving device 10 includes a substrate 101 and a light receiving element 102 that is attached to the substrate 101 and receives an operation signal from a remote controller (not shown).
The substrate 101 is formed in a substantially rectangular plate shape, and a hole 101A is formed at a position facing the screw hole 236A formed in the inclined surface 236. The substrate 101 is fixed by screwing the screw 101B into the screw hole 236A through the hole 101A.
The light receiving element 102 is attached to the left end portion when viewed from the front portion 233 side of the substrate 101 so that the light receiving direction B substantially coincides with the normal direction of the substrate 101. Therefore, the light receiving direction B of the light receiving device 10 is inclined with respect to the front surface portion 233 and the upper surface portion 211 where the light receiving opening 232 is formed, and outside the exterior housing 2 via the light receiving opening 232. It is said that the direction is heading.

FIG. 6 is a perspective view of the light receiving window 11 as seen from the back side.
The light receiving window 11 is formed by molding a light-transmitting material. As shown in FIGS. 4 and 6, the light receiving window 11 closes the light receiving opening 232 and introduces an operation signal into the light receiving opening 232. The light receiving units 111 and 112 and the reflection units 113 and 114 that reflect at least part of the operation signals introduced from the light receiving units 111 and 112 are provided. In addition, each light-receiving part 111,112 and each reflection part 113,114 are mirror-finished.
The light receiving unit 111 and the light receiving unit 112 are each formed into a substantially rectangular plate shape, and have a substantially L shape in a longitudinal sectional view extending along the front surface part 233 and the upper surface part 211. In addition, the light receiving portion 112 is formed with a protruding portion 112A that protrudes toward the back surface portion 214 side of the exterior housing 2.
The reflecting portion 113 and the reflecting portion 114 extend from the longitudinal edges of the light receiving portion 111 and the light receiving portion 112 into the light receiving opening 232. That is, each of the reflecting portions 113 and 114 intersects with each of the light receiving portions 111 and 112 and extends toward the inside of the light receiving opening 232. In each of the reflecting portions 113 and 114, notches 113 </ b> A and 114 </ b> A that form a gap L between the light receiving portion 111 are formed.

  4 and 5, the light receiving window 11 is fitted into the notch 235 so as to sandwich the protruding portion 235A between the light receiving portion 111 and the notches 113A and 114A of the reflecting portions 113 and 114, and the upper surface. The protrusion 211A of the light receiving part 112 is pressed by the part 211 and attached to the exterior housing 2.

The projector 1 according to the present embodiment has the following effects.
(1) The light receiving direction B of the light receiving device 10 is inclined with respect to the front surface portion 233 and the upper surface portion 211 where the light receiving opening 232 is formed, and the outside of the exterior housing 2 through the light receiving opening 232. Therefore, even when the operation signal is sent from the upper front side of the projector 1, a good light receiving state can be obtained.
(2) Since each of the light receiving portions 111 and 112 is provided along the front surface portion 233 and the upper surface portion 211 where the light receiving opening 232 is formed, the operation signal sent from the upper rear side of the projector 1 is Introduced into the light receiving unit 112 provided along the upper surface portion 211 of the exterior housing 2, and a part of the light is reflected by the light receiving unit 111 provided along the front surface portion 233 of the exterior housing 2. Received light. Therefore, it is possible to obtain a good light receiving state with respect to the operation signal transmitted from the upper rear side of the projector 1, and thus the light receiving range of the light receiving device 10 can be extended.

(3) Since the inclined surface 236 is provided in the light receiving opening 232, the light receiving direction B of the light receiving device 10 is changed to the light receiving opening with a simple configuration by simply fixing the substrate 101 to the inclined surface 236. When the operation signal is sent from the oblique direction to the projector, it can be inclined with respect to the front surface portion 233 and the upper surface portion 211 where the portion 232 is formed, and can be directed to the outside of the exterior housing 2. Even if it exists, a favorable light receiving state can be obtained.
(4) The operation signal sent from the upper side of the side surface of the projector 1 is introduced into the light receiving units 111 and 112 provided along the front part 233 or the upper surface part 211 of the exterior housing 2. At least a part of the light is reflected by the reflecting portions 113 and 114 that intersect with 112 and extend into the light receiving opening 232 and are received by the light receiving device 10. Therefore, it is possible to obtain a good light receiving state with respect to the operation signal transmitted from the upper side of the side surface of the projector 1, and thus the light receiving range of the light receiving device 10 can be extended.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, the light receiving opening 232 is formed at a corner where the front surface 233 and the upper surface 211 of the exterior housing 2 intersect, but for example, the back surface 214 and the upper surface 211 of the exterior housing 2. May be formed at the corners where the front part 233, the upper surface part 211, and the side part 213 of the outer casing 2 intersect. In short, the light receiving opening may be formed at a corner where a plurality of surfaces of the exterior casing intersect.

In the above-described embodiment, the light receiving window 11 includes the two light receiving portions 111 and 112 having a substantially L-shape in a longitudinal sectional view extending along the front surface portion 233 and the upper surface portion 211. One light-receiving part may be provided, and three or more light-receiving parts may be provided.
In the embodiment, by fixing the substrate 101 to the inclined surface 236, the light receiving direction B of the light receiving device 10 is inclined with respect to the front surface portion 233 and the upper surface portion 211 in which the light receiving opening 232 is formed, and Although the direction toward the outside of the exterior housing 2 is set via the light receiving opening 232, for example, the substrate 101 may be directly fixed to the front portion 233. In short, it is only necessary that the light receiving direction of the light receiving device is inclined with respect to each surface on which the light receiving openings are formed and is directed to the outside of the exterior housing through the light receiving openings.

In the embodiment, the light receiving window 11 includes the two reflecting portions 113 and 114 that intersect the light receiving portions 111 and 112 and extend into the light receiving opening 232. Only the reflection part may be provided, and further, such a reflection part may not be provided.
In the above-described embodiment, the optical device 4 has a configuration having a substantially L shape in plan view. However, the configuration is not limited to this, and for example, a configuration having a substantially U shape in plan view may be employed.
In each of the above embodiments, the transmissive liquid crystal panel 441 is employed. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed, or a digital micromirror device (DMD) may be employed. Good. DMD is a trademark of Texas Instruments Incorporated.

  The present invention can be suitably used for a projector.

1 is a perspective view of a projector according to an embodiment of the present invention as viewed from the front side. The perspective view which shows the apparatus main body in the said embodiment. FIG. 2 is a schematic diagram showing an optical system of the optical device in the embodiment. 2 is an exploded perspective view of a light receiving device, a light receiving window, an upper case, and a front case in the embodiment. FIG. Sectional drawing which shows the light-receiving device and light-receiving window in the said embodiment. The perspective view which looked at the light-receiving window in the said embodiment from the exterior housing | casing side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 4 ... Optical apparatus (image projection apparatus), 10 ... Light receiving device, 11 ... Light receiving window, 101 ... Substrate, 102 ... Light receiving element, 111, 112 ... Light receiving part, 113, 114 ... Reflecting portion, 232... Light receiving opening, 236... Inclined surface, B.

Claims (4)

An image projection apparatus that modulates light emitted from a light source according to input image information to form image light, and enlarges and projects the formed image light, and an operation signal for operating the image projection apparatus A projector comprising a light receiving device that receives light, and an exterior housing that houses the image projection device and the receiving device,
The exterior housing has a plurality of surfaces intersecting each other, and a light receiving opening for housing the light receiving device is formed at a corner where each surface intersects,
The light receiving device is provided in the light receiving opening, the light receiving direction of the light receiving device is inclined with respect to each surface on which the light receiving opening is formed, and the light receiving device passes through the light receiving opening. A projector characterized in that the direction is toward the outside of the exterior housing. The projector according to claim 1, wherein
A light receiving window for closing the light receiving opening and introducing the operation signal into the light receiving opening;
The projector according to claim 1, wherein the light receiving window includes a plurality of light receiving portions provided along each surface on which the light receiving opening is formed. In the projector according to claim 1 or 2,
In the light receiving opening, a direction that is inclined with respect to each surface on which the light receiving opening is formed and that faces the outside of the exterior casing through the light receiving opening is a normal direction. An inclined surface is provided,
The light receiving device is:
A substrate fixed to the inclined surface;
A light receiving element attached to the substrate and receiving the operation signal;
The projector according to claim 1, wherein a light receiving direction of the light receiving element substantially coincides with a normal direction of the inclined surface. In the projector according to claim 2 or 3,
The light receiving opening is formed at a corner where two surfaces of the exterior housing intersect,
The light receiving window is
A projector having a reflecting portion that intersects with each of the light receiving portions and extends into the light receiving opening.

Images