JP2009229562A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of forming properly an image and capable of outputting properly a voice. <P>SOLUTION: The projector 1 includes a reflector 9 having a reflecting face 911, an acquisition means 81 for acquiring an image signal, a left voice signal and a right voice signal, a voice signal output means 84, a vertically inverting means 851 for correcting the image signal to invert vertically the image formed by an optical modulator 32, and for outputting the left voice signal in a left loudspeaker 61 and the right voice signal in a right loudspeaker 62 by the voice signal output means 84, a laterally inverting means 852 for correcting the image signal to invert laterally the image formed by the optical modulator 32, and for outputting the right voice signal in the left loudspeaker 61 and the left voice signal in the right loudspeaker 62 by the voice signal output means 84, an image signal output means 86 for outputting a corrected image signal to the optical modulator 32, and a selection means 83 for functioning either of the inverting means 851 and 852. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector.

  Conventionally, an illumination optical system, a liquid crystal light valve that modulates a light beam emitted from the illumination optical system according to an image signal to form image light, a projection optical system that projects image light on a screen or a wall surface, and projection There is known a projector including a stereo speaker that outputs sound in accordance with an image to be played (see, for example, Patent Document 1). The stereo speaker includes a right channel speaker provided on the right side of the casing in the projection direction and a left channel speaker provided on the left side of the casing. In the projector described in Patent Document 1, it is possible to output realistic sound by outputting two-channel sound in accordance with the image to be projected by the left and right speakers. Such a projector is usually placed on a desk or suspended from a ceiling in a posture in which the emission direction of the image light is substantially horizontal, and projects the image light on a screen or wall surface provided in front of the projector. .

  However, in recent years, there has been a demand for a projector that can project image light onto the ceiling. Here, as a configuration for projecting the image light onto the ceiling, for example, a reflection plate is provided obliquely in front of the projection lens (projection optical system), and the image light horizontally emitted from the projection lens by the reflection plate is provided on the ceiling side. A configuration in which image light is projected onto the ceiling by reflecting on the ceiling is conceivable.

JP 2005-77912 A

However, when the user looks at the image formed on the ceiling with the body (face) facing in the direction in which the image light is emitted from the projection lens, the vertical direction is reversed. In addition, when the image formed on the ceiling is viewed with the body facing in the direction opposite to the direction in which the image light is emitted from the projection lens, there is a problem that the left and right directions are reversed.
Further, when the configuration using the above-described reflector is applied to the projector described in Patent Document 1 having a stereo speaker, in addition to the above-described problem, the user is referred to as the image light emission direction from the projection lens. When viewing an image formed on the ceiling with the body facing in the opposite direction, the left and right ears of the user are positioned opposite to the left and right speakers of the projector. There is a problem that audio is output in the opposite direction.

  An object of the present invention is to provide a projector capable of appropriately performing image formation and sound output.

  A projector of the present invention includes a light source device, a light modulation device that modulates a light beam emitted from the light source device according to an image signal to form image light, a projection optical device that magnifies and projects the image light, Provided with a speaker, an acquisition means for acquiring an image signal and an audio signal, an audio signal output means for selectively outputting the audio signal to each speaker, and an optical modulator. In order to invert the image formed by the up-and-down inversion, the up-and-down inversion means for correcting the image signal acquired by the acquisition means, and the left and right of the image formed by the light modulation device is inverted. The image signal acquired by the acquisition unit is corrected, the audio signal output unit reverses the left and right of the output sound, and the image signal corrected by the inversion unit An image signal output means for outputting the light modulation device, of the upside-down means and the right and left reversing means, characterized by comprising selecting means to function either.

  According to the present invention, the projector is attached with a reflection device having a reflection surface arranged in the image light emission direction of the projection optical device, and the reflection device reflects the image light emitted from the projection optical device. When projecting image light onto a projection surface such as a ceiling, when the user looks at an image formed on the ceiling with the body facing in the direction in which the image light is emitted from the projection optical device, the upside down means is used. By making it function, an image in which the upper and lower sides are inverted from the original can be formed by the light modulation device. Since this image is reflected by the reflecting device and then projected onto the ceiling in the original vertical direction, an image with the correct vertical direction can be formed on the ceiling. In addition, when the user views an image formed on the ceiling with the body facing in the direction opposite to the direction in which the image light is emitted from the projection optical device, the light modulation device can Thus, an image in which the left and right sides are reversed from the original can be formed. Since this image is reflected by the reflecting device and then projected on the ceiling in the original right and left direction, an image with the right and left directions can be formed on the ceiling. Moreover, since the polarities of the left and right speakers can be reversed by causing the left / right reversing means to function, appropriate sound corresponding to the left and right ears of the user can be output from the left and right speakers. Therefore, image forming and sound output can be appropriately performed by causing the reversing means corresponding to the posture of the user with respect to the image light emission direction of the projection optical apparatus to function.

In the projector according to the aspect of the invention, the projector includes a reflection device having a reflection surface arranged in the image light emission direction of the projection optical device, and a projector main body having attachment detection means. The reflection device is attached to the projector main body. The attachment detection means detects whether or not the reflection device is attached to the projector body, and the selection means attaches the reflection device to the projector body by the attachment detection means. It is preferable that either one of the upside down means and the left and right inversion means is caused to function.
According to the present invention, since the attachment detecting means detects that the reflecting device is attached to the projector main body, the selecting means automatically causes one of the reversing means to function. When installed, it is unnecessary to manually start up the reversing means.

  In the projector according to the present invention, an operation unit that outputs an operation signal corresponding to an operation, and an operation of the operation unit causes the projector to invert the image upside down, and to invert the image left and right and output sound. Setting means for setting one of the left and right reversal modes for reversing the left and right of the projector, and the selecting means functions when the projector is set to the upside down mode. When the left / right reversal mode is set, the left / right reversing means is preferably functioned.

  According to the present invention, according to the operation of the operating means by the user, the setting means sets which one of the upside down means and the left and right inversion means functions, so that the user can operate the operating means by operating the operating means. Which reversing means is allowed to function can be set according to one's posture. Accordingly, it is possible to reliably perform image formation and sound output appropriately.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of the projector 1 according to the present embodiment.
The projector 1 is placed on a horizontal surface such as a floor or a desk, for example, and enlarges and projects image light onto a projection surface such as a ceiling T and outputs sound. The projector 1 includes a projector body 10 having a housing 2, an optical unit 3, an attachment detection unit 4, an inclination angle detection unit 5, a stereo speaker 6, an operation unit 7, and a control device 8, and a reflection device 9. Yes.

  Among these, the reflection device 9 projects image light onto the ceiling T by reflecting image light emitted from a projection optical device 33 (described later) of the optical unit 3 toward the ceiling T side. The reflection device 9 includes a reflection unit 91, a support unit 92, an adjustment unit 93, and a rotation angle detection unit 94. The reflection device 9 is detachably provided on the housing 2.

The reflection unit 91 has a reflection surface 911 disposed in the image light emission direction of the projection optical device 33, and reflects the image light emitted from the projection optical device 33 toward the ceiling T.
One end side of the support portion 92 is detachably provided on the housing 2. On the other end side of the support portion 92, an adjustment portion 93 that holds the reflection portion 91 is provided. The support part 92 supports the reflection part 91 via the adjustment part 93.

FIG. 2 is a side view showing the rotation angle θ of the reflecting portion 91.
The adjustment unit 93 rotatably holds the reflection unit 91 supported by a support unit 92 having a rotation axis orthogonal to the traveling direction of the image light. Then, the adjustment unit 93 rotates the reflection unit 91 with respect to the central axis of the image light emitted from the projection optical device 33 in accordance with a control signal output from the control device 8 based on an operation of the operation unit 7 described later. (An inclination angle of the reflection part 91 with respect to the advancing direction of image light: refer FIG. 2) is adjusted, and the projection angle with respect to the horizontal direction of the image light projected on the ceiling T is adjusted.

  The rotation angle detection means 94 detects the rotation angle θ of the reflection portion 91 with respect to the central axis of the image light. As shown in FIG. 2, since the projection angle is 2θ, when the projector 1 is placed horizontally, when the rotation angle of the reflection unit 91 is 30 degrees, for example, the projection angle is 60 degrees. When the rotation angle θ 91 is 45 degrees, the projection angle is 90 degrees. Note that when the projector 1 is placed horizontally and the rotation angle θ of the reflecting portion 91 is 45 degrees, the image formed on the ceiling T is not distorted.

  Returning to FIG. 1, the housing | casing 2 to which the reflecting device 9 is attached is formed in a box shape, and accommodates each components 3-8 inside. In such a housing 2, a leg portion 21 is provided on the side where a projection optical device 33 described later is provided. The leg portion 21 is configured to be extendable and contractible. For example, by extending, the leg 21 can set the image light emission angle of the projection optical device 33 upward with respect to the horizontal plane.

The optical unit 3 forms image light in accordance with an image signal output from the control device 8, and enlarges and projects the image light. The optical unit 3 includes a light source device 31, a light modulation device 32, and a projection optical device 33. Although not shown, the optical unit 3 is a color that separates the light beam emitted from the light source device 31 into R (red), G (green), and B (blue) color lights in addition to these configurations. A separation optical device; and a color synthesis optical device such as a cross dichroic prism that synthesizes each color light.
The light source device 31 includes a discharge-type light source lamp and a reflector that reflects the emitted light emitted from the light source lamp, and emits a light beam toward the color separation optical device. The light beam emitted from the light source device 31 is separated into R, G, and B color lights by the above-described color separation optical device.

The light modulation device 32 is composed of three liquid crystal panels respectively arranged on the optical paths of the R, G, and B color lights separated by the color separation optical device, and the incident light flux is output from the control device 8. Modulate according to the image signal. Image light corresponding to each color light modulated by each liquid crystal panel is synthesized by a color synthesis optical device.
The projection optical device 33 includes a lens barrel and a plurality of projection lenses housed in the lens barrel, and enlarges and projects the image light synthesized by the color synthesis optical device.

The attachment detection means 4 detects whether or not the reflection device 9 is attached to the housing 2.
The tilt angle detection means 5 is constituted by an acceleration sensor or the like, and the tilt angle of the projector 1 with respect to the horizontal plane, for example, the horizontal plane when the projector 1 is installed so that the leg 21 is extended and the central axis of the image light is directed upward. The inclination angle of the projector 1 with respect to is detected.
The stereo speaker 6 outputs sound under the control of the control device 8. This stereo speaker 6 includes a left speaker 61 provided on the left side in the image light emission direction in the housing 2 and a right speaker 62 provided on the right side in the image light emission direction in the housing 2. I have.

  The operation means 7 includes an operation panel 71 provided on the housing 2 and a remote controller 72, and outputs an operation signal corresponding to an input operation by the user to the control device 8. By the operation of the operation means 7 by the user, the adjustment unit 93 is driven as described above, and the rotation angle of the reflection unit 91 is adjusted. Further, by the operation of the operation means 7 by the user, the mode of the projector 1 relating to image formation and sound output is set to any one of a vertically reversed mode and a horizontally reversed mode which will be described later.

The control device 8 is configured as a circuit board on which a CPU (Central Processing Unit) and a storage device are mounted, and controls the entire projector 1. Further, the control device 8 adjusts the image orientation and the left / right output of the sound according to the set mode. The control device 8 includes an acquisition unit 81, a setting unit 82, a selection unit 83, an audio signal output unit 84, a correction unit 85, and an image signal output unit 86.
The acquisition unit 81 acquires an image signal related to a display image, a left audio signal, and a right audio signal from an external device such as a personal computer connected to the projector 1.

The setting unit 82 sets the mode of the projector 1 to one of the upside down mode and the left side reverse mode in accordance with an operation signal output from the operation unit 7 based on a user input operation.
When the attachment detection means 4 detects the attachment of the reflection device 9 to the housing 2, the selection means 83 causes the means 851 to 853 corresponding to the set mode to function. That is, the selection unit 83 causes the up / down inversion unit 851 and the distortion correction unit 853 described later to function when the mode of the projector 1 is set to the up / down inversion mode. The inversion unit 852 and the distortion correction unit 853 are caused to function.

The audio signal output unit 84 selectively outputs the left audio signal and the right audio signal to the left speaker 61 and the right speaker 62 under the instruction of the correction unit 85.
The correcting unit 85 corrects the image signal according to the set mode, and selects which of the left audio signal and the right audio signal is output to each of the speakers 61 and 62. The image signal corrected by the correcting unit 85 is output to the light modulation device 32 by the image signal output unit 86. The correction unit 85 includes a vertical inversion unit 851, a horizontal inversion unit 852, and a distortion correction unit 853.

  FIG. 3 is a diagram showing a projection image projected on a wall surface provided perpendicular to the floor surface. In FIG. 3, the size of the formed image formed by the light modulation device 32 and the projected image projected on the wall surface are drawn with the same dimensions. FIG. 4 is a diagram illustrating a projected image when the user looks at the projected image projected onto the ceiling T in a state where the body is directed in the emission direction of the image light from the projection optical device 33.

As shown in FIG. 3, an image formed by the light modulation device 32 (an image when the image is viewed from the proximal end side to the distal end side in the emission direction of the image) is transmitted from the projection optical device 33. When projecting horizontally and projecting onto a vertical wall surface in front of the projector without passing through the reflector 9, the vertical and horizontal directions on the wall surface are the same as the vertical and horizontal directions of the formed image. An image is formed.
However, as shown in FIG. 4, when the image (formed image) emitted horizontally from the projection optical device 33 is reflected to the ceiling T side by the reflection device 9, the user can use the image light from the projection optical device 33. When viewing an image formed on the ceiling T with the body (face) facing the emission direction, the vertical direction of the image is reversed from the original direction, that is, the vertical direction of the formed image.

FIG. 5 is a diagram showing a formed image related to the image signal corrected by the upside down means 851.
Therefore, when the upper / lower inversion means 851 is set to the upper limit inversion mode, the upper and lower sides of the image formed by the light modulation device 32 are formed based on the image signal before correction, as shown in FIG. The image signal is corrected so as to be inverted with respect to the upper and lower sides of the image, and an image with an appropriate orientation is formed on the ceiling T by causing the light modulation device 32 to form an image in which the upper and lower sides are inverted with respect to the original direction.

  That is, in the present embodiment, when the user views the projection image with the body directed in the direction in which the image light is emitted from the projection optical device 33, the user operates the operation unit 7 to enter the upside down mode. By setting, the selecting unit 83 causes the upside down unit 851 to function, and the upside down unit 851 forms an image in which the vertical direction is reversed from the original direction in the light modulation device 32, so that the image in the direction suitable for the ceiling T Can be formed. Note that the upside down unit 851 causes the audio signal output unit 84 to output the left audio signal to the left speaker 61 and the right audio signal to the right speaker 62 as usual.

FIG. 6 is a diagram illustrating a projection image when the user views the projection image projected on the ceiling T in a state where the user faces the body in the direction opposite to the direction in which the image light is emitted from the projection optical device 33. . FIG. 7 is a diagram showing a formed image related to the image signal corrected by the left / right reversing means 852.
On the other hand, as shown in FIG. 6, when an image emitted horizontally from the projection optical device 33 is reflected to the ceiling T side by the reflection device 9 and projected onto the ceiling T, the user receives an image from the projection optical device 33. When an image formed on the ceiling T is viewed with the body facing away from the light emission direction, the left and right orientations of the image formed on the ceiling T are reversed from the original orientation. . In addition, since the left and right ears of the user are positioned opposite to the left and right speakers 61 and 62, the user can hear the left and right sides of the voice in reverse.

  Therefore, when the right / left reversing mode is set by the user, the left / right reversing unit 852 performs the pre-correction of the left and right sides of the image formed by the light modulation device 32 as shown in FIG. The image signal is corrected so as to be reversed with respect to the left and right of the image formed based on the image signal, and the light modulation device 32 forms an image in which the left and right directions are reversed from the original direction. An image with a proper orientation is formed. Also, the left / right reversing means 852 causes the audio signal output means 84 to output the right audio signal to the left speaker 61 and the left audio signal to the right speaker 62, so that appropriate audio corresponding to the left and right ears of the user can be obtained. Are output to the speakers 61 and 62.

FIG. 8 is a diagram illustrating distortion of the projected image when the reflection unit 91 is held so that the rotation angle is 45 degrees or less, and FIG. 9 is a formed image related to the image signal corrected by the distortion correction unit 853. FIG.
When the projector is installed horizontally, as shown by the solid line in FIG. 8, when the reflecting unit 91 is held by the adjusting unit 93 so that the rotation angle of the image light is 45 degrees, the light is projected onto the ceiling T. The projected image is not distorted (the image formed on the ceiling T is not distorted). However, for example, when the projector 1 is installed such that the leg 21 is extended so that the central axis of the image light faces upward, or when the projector 1 is installed horizontally as shown by the one-dot chain line in FIG. In FIG. 5, when the reflection unit 91 is held by the adjustment unit 93 such that the rotation angle is other than 45 degrees, the projection image is distorted.

  Therefore, the distortion correction unit 853 receives the rotation angle of the reflection unit 91 detected by the rotation angle detection unit 94 and the inclination angle of the projector 1 with respect to the horizontal plane detected by the inclination angle detection unit 5 under the instruction of the selection unit 83. Based on the above, the image signal corrected by the reversing means 851 and 852 is further corrected so that the projected image is not distorted.

  Specifically, for example, when the projector 1 is installed horizontally, the distortion correction unit 853 is held by the adjustment unit 93 so that the reflection unit 91 has a rotation angle other than 45 degrees, and the projector 1 is in the upside down mode. 9 is shown in FIG. 9 based on the rotation angle of the reflecting portion 91 detected by the rotation angle detection means 94 and the inclination angle of the projector 1 with respect to the horizontal plane detected by the inclination angle detection means 5. As described above, the image signal corrected by the upside down means 851 is further subjected to trapezoidal distortion correction (keystone correction), and the light modulation device 32 forms a trapezoidal image, thereby forming a projection image without distortion. That is, an image without distortion is formed on the ceiling T.

FIG. 10 is a diagram illustrating the distortion of the projection image when the projector 1 is inclined with respect to the horizontal plane along the central axis of the emitted image light.
As shown in FIG. 10, when the reflecting unit 91 is held by the adjusting unit 93 so that the rotation angle is 45 degrees, the projector 1 emits image light emitted by the extension of the leg unit 21 or the like. Even when tilted with respect to the horizontal plane along the central axis, vertical trapezoidal distortion occurs in the projected image. In this case as well, the distortion correction means 853 is an image formed on the ceiling T as described above. The image signal is corrected for trapezoidal distortion (see FIG. 9) so that no distortion occurs. Note that the trapezoidal distortion correction amount in this case is set to an amount different from the trapezoidal distortion correction amount when image light is projected onto a screen or the like provided perpendicular to the floor surface.

FIG. 11 is a diagram illustrating distortion that occurs in the projected image when the projector 1 is tilted around the central axis of the emitted image light. FIG. 12 is a diagram illustrating a formed image related to the image signal corrected by the distortion correcting unit 853.
Further, even when the projector 1 is tilted about the central axis of the emitted image light, as shown in FIG. 11, the image formed on the ceiling T has a horizontal trapezoidal distortion. In addition, the distortion correction unit 853 suppresses distortion generated in the image formed on the ceiling T by performing trapezoidal distortion correction (horizontal trapezoidal distortion correction) as shown in FIG.

Hereinafter, the adjustment process of the image direction and the left and right outputs of the sound by the projector 1 will be described. FIG. 13 is a flowchart showing the adjustment process by the projector 1.
The following steps are executed when the projector 1 performs a predetermined operation by the user. When the projector 1 performs a predetermined operation by the user, the acquisition unit 81 acquires an image signal related to a display image, a left audio signal, and a right audio signal from an external device such as a personal computer connected to the projector 1. (Step S1).
After step 1, the setting means 82 changes the mode of the projector 1 to one of the upside down mode and the left side inversion mode according to the operation signal output from the operation means 7 based on the input operation of the user. (Step S2).

  After step S2, the selection means 83 detects that the attachment detection means 4 detects that the reflection device 9 is attached to the housing 2 and if the mode of the projector 1 is set to the upside down mode, the selection means 83 The reversing unit 851 and the distortion correcting unit 853 are caused to function, and when the mode of the projector 1 is set to the left / right reversing mode, the left / right reversing unit 852 and the distortion correcting unit 853 are caused to function. Specifically, when the attachment detection unit 4 detects the attachment of the reflection device 9 to the housing 2, the selection unit 83 sets the mode of the projector 1 to either the upside down mode or the left side upside mode. Is determined (step S3).

When it is determined that the mode of the projector 1 is set to the upside down mode (step S3: YES), the selection unit 83 causes the upside down unit 851 to function.
That is, after step S3, the upside down means 851 corrects the image signal so that the top and bottom of the image formed by the light modulation device 32 is reversed from the top and bottom of the image formed based on the image signal before correction. At the same time, the audio signal output unit 84 outputs the left audio signal to the left speaker 61 and the right audio signal to the right speaker 62 (step S4).

On the other hand, when it is determined that the mode of the projector 1 is set to the left / right reversal mode (step S3: NO), the selection unit 83 causes the left / right reversing unit 852 to function.
That is, after step S3, the left / right reversing means 852 corrects the image signal so that the left / right of the image formed by the light modulation device 32 is reversed from the left / right of the image formed based on the image signal before correction. At the same time, the audio signal output unit 84 outputs the right audio signal to the left speaker 61 and the left audio signal to the right speaker 62 (step S5).

After steps S4 and S5, the distortion correcting unit 853 is based on the rotation angle of the reflecting portion 91 detected by the rotation angle detecting unit 94 and the tilt angle of the projector 1 with respect to the horizontal plane detected by the tilt angle detecting unit 5. The image signals corrected by the reversing means 851 and 852 are further corrected so as not to cause distortion in the projected image (step S6).
After step S6, the image signal output means 86 outputs the corrected image signal to the light modulation device 32 (step S7).

According to the projector 1 of the present embodiment as described above, the following effects can be obtained.
(1) The projector 1 corrects the image signal so as to invert the left and right of the formed image, and the upside down means 851 for correcting the image signal so that the top and bottom of the image formed by the light modulation device 32 is inverted. Left / right reversing means 852 for reversing the polarities of the left and right speakers 61, 62 is provided. According to this, when the user looks at the image formed on the ceiling T with the body directed in the direction in which the image light is emitted from the projection optical device 33, the upside down means 851 is made to function so that the user can When viewing an image formed on the ceiling T with the body facing in the direction opposite to the direction in which the image light is emitted from the projection optical device 33, the right and left reversing means 852 is made to function so that it is appropriate for the ceiling T. An orientation image can be formed, and appropriate sound corresponding to the left and right ears of the user can be output from the left and right speakers 61 and 62.

(2) When the attachment detection means 4 detects that the reflection device 9 is attached to the projector main body 10, any of the reversing means 851, 852 automatically functions, so that the reflection device 9 is attached to the projector main body 10. At this time, it is unnecessary to manually start up the means 851 and 852.
(3) Since the setting means 82 sets which of the upside down means 851 and the left and right inversion means 852 functions according to the operation of the operating means 7 by the user, the user can select which inversion means 851, It can be set according to one's posture whether 852 is made to function. Accordingly, it is possible to reliably perform image formation and sound output appropriately.

(4) Since the image signal is corrected based on the rotation angle of the reflecting portion 91 with respect to the traveling direction of the image light so that distortion does not occur in the projection image, distortion of the image formed by projecting the projection image on the ceiling is reduced. Can be suppressed. Further, since the image signal is corrected based on the tilt angle of the projector 1 with respect to the horizontal plane so as not to cause distortion in the projected image, distortion of the image formed on the ceiling can be further suppressed.
(5) Since the adjustment unit 93 can adjust the rotation angle of the reflection unit 91 with respect to the traveling direction of the image light, the projection range of the image light can be widened.

[Second Embodiment]
Next, a projector 1A according to a second embodiment of the invention will be described. In addition, about the same functional part as the already demonstrated part, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
FIG. 14 is a block diagram illustrating a configuration of the projector 1A according to the present embodiment.
As shown in FIG. 14, the projector 1 </ b> A of the present embodiment has the same configuration as the projector 1 described above. However, in the projector 1 described above, the reflection device 9 is detachably provided on the projector main body 10, but in the projector 1A of the present embodiment, the reflection device 9A is not detachably provided. 10 differs from the projector 1 described above in that it is provided integrally with the projector 10.

  Further, the projector 1 described above is provided with the attachment detection means 4 for detecting the attachment of the reflection device 9 to the projector main body 10. However, the projector 1A according to the present embodiment is not provided with the attachment detection means 4. This is also different from the projector 1 described above. Thereby, in the projector 1A of the present embodiment, the selection unit 83 responds to the mode automatically set by the user performing a predetermined operation on the projector 1A, such as the user turning on the projector 1A. Each means 851 to 853 is made to function. That is, when the mode of the projector 1 is set to the up / down inversion mode, the up / down inversion unit 851 and the distortion correction unit 853 are caused to function, and when the mode of the projector 1 is set to the left / right inversion mode, The inversion unit 852 and the distortion correction unit 853 are caused to function.

Such a projector 1A according to the present embodiment can achieve the same effects (1) and (3) to (5) as described above, and the following effects.
(6) Since the reflecting device 9A is provided integrally with the projector 1A, the attachment detecting means 4 can be dispensed with, and the manufacturing cost of the projector 1A can be reduced.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the first embodiment, the projector 1 is configured to automatically select which inversion means 851 and 852 to function by detecting the attachment of the reflecting device 9, but the projector 1 After the reflection device 9 is attached, any of the reversing means 851 and 852 may be manually operated.

In each of the above embodiments, the reflecting portion 91 is rotatably held, but the reflecting portion 91 may not be rotatably held and may be held at a predetermined inclination angle.
In each of the embodiments described above, the light modulation device is configured to include a liquid crystal panel, but may be configured to include a DMD (Digital Micromirror Device: trademark of Texas Instruments Incorporated).

  The present invention can be used for a projector, and in particular, can be suitably used for a projector used for a home theater.

1 is a block diagram showing a configuration of a projector according to a first embodiment of the invention. The side view which shows the rotation angle of the reflection part in the said embodiment. The figure which shows the projection image projected on the wall surface provided perpendicularly | vertically with respect to the floor surface in the said embodiment. The figure which shows a projection image at the time of seeing the projection image projected on a ceiling in the state in which the user turned the body in the emission direction of the image light from the projection optical apparatus in the said embodiment. The figure which shows the formation image which concerns on the image signal correct | amended by the vertical inversion means in the said embodiment. The figure which shows a projection image at the time of seeing the projection image projected on the ceiling in the said embodiment in the state in which the user turned the body in the direction opposite to the emission direction of the image light from a projection optical apparatus. The figure which shows the formation image which concerns on the image signal correct | amended by the left-right inversion means in the said embodiment. The figure which shows the distortion of a projection image in case the reflection part is hold | maintained so that the rotation angle in the said embodiment may be 45 degrees or less. The figure which shows the formation image which concerns on the image signal correct | amended by the distortion correction means in the said embodiment. The figure which shows distortion of a projection image in case the projector in the said embodiment inclines with respect to a horizontal surface along the central axis of the image light inject | emitted. The figure which shows the distortion which arises in a projection image when the projector in the said embodiment inclines. The figure which shows the formation image which concerns on the image signal correct | amended by the distortion correction means in the said embodiment. The flowchart which shows the adjustment process of the direction of an image and the right-and-left output of an audio | voice in the said embodiment. The block diagram which shows the structure of the projector which concerns on 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A ... Projector, 4 ... Attachment detection means, 7 ... Operation means, 9, 9A ... Reflection device, 10 ... Projector body, 31 ... Light source device, 32 ... Light modulation device, 33 ... Projection optical device, 61 ... Left speaker 62 ... right speaker, 81 ... acquisition means, 82 ... setting means, 83 ... selection means, 84 ... audio signal output means, 86 ... image signal output means, 851 ... up / down inversion means, 852 ... left / right inversion means, 911 ... reflection surface.

Claims (3)

A light source device; a light modulation device that modulates a light beam emitted from the light source device according to an image signal to form image light; a projection optical device that magnifies and projects the image light; and a plurality of speakers. A projector,
An acquisition means for acquiring an image signal and an audio signal;
Audio signal output means for selectively outputting the audio signal to each speaker;
Upside down means for correcting the image signal acquired by the acquisition means so that the image formed by the light modulation device is turned upside down;
A left / right reversing unit that corrects the image signal acquired by the acquiring unit so that the left / right of the image formed by the light modulation device is reversed, and causes the audio signal output unit to invert the left and right of the output sound; ,
Image signal output means for outputting the image signal corrected by the inverting means to the light modulation device;
A projector comprising: a selection unit that causes any one of the vertical reversing unit and the horizontal reversing unit to function. The projector according to claim 1, wherein
A reflection device having a reflection surface disposed in the image light emission direction of the projection optical device;
A projector body having attachment detecting means,
The reflection device is detachably provided on the projector body,
The attachment detection means detects whether or not the reflection device is attached to the projector body,
The selection unit causes either one of the upside down unit and the left / right inversion unit to function when the attachment detecting unit detects the attachment of the reflection device to the projector body. projector. In the projector according to claim 1 or 2,
An operation means for outputting an operation signal corresponding to the operation;
By operating the operation means, the projector is set to one of a vertical inversion mode in which the image is inverted upside down and a horizontal inversion mode in which the left and right of the image are inverted and the left and right of the output sound are inverted. Setting means,
The selection means causes the up / down inversion means to function when the projector is set in the up / down inversion mode, and causes the left / right inversion means to function when the projector is set in the left / right inversion mode. projector.

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