JP2011166390A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector for projecting images with high image quality on a projection plane during oblique projection. <P>SOLUTION: The projector includes: a projection part 20 for projecting images based on image data displayed at a display part 28; a casing for housing the projection part; a projection range setting part for setting a projection range on the casing side in a projection area on the projection plane of projection light emitted from the projection part; and an image processing part 50 for performing image processing on the image data input to the display part on the basis of the projection range set by the projection range setting part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projector.

  A projector capable of projecting in a desired projection direction by selecting a downward projection attachment, a horizontal projection attachment, or an upward projection attachment that is detachably assembled to the projector body is known (see, for example, Patent Document 1). .

JP 2007-41178 A

  In this projector, although an image can be projected toward a desired projection surface by selecting an attachment, no consideration is given to the image quality of the projected image.

  An object of the present invention is to provide a projector capable of projecting a projection image on an arbitrary projection plane with high projection image quality.

  The projector of the present invention includes a projection unit that projects an image based on image data displayed on a display unit, a housing that houses the projection unit, and a projection area on the projection plane of projection light emitted from the projection unit An image for performing image processing on image data input to the display unit based on the projection range setting unit that sets a projection range on the housing side and the projection range set by the projection range setting unit And a processing unit.

  According to the projector of the present invention, it is possible to project an image with high image quality on an arbitrary projection plane.

1 is a perspective view showing an external appearance of a projector according to a first embodiment. It is sectional drawing which shows the structure inside the projection unit which concerns on 1st Embodiment. It is a block diagram which shows the structure of the projector which concerns on 1st Embodiment. It is a figure which shows the projection state in 1st projection mode of the projector which concerns on 1st Embodiment. It is a figure which shows the projection state in the 2nd projection mode of the projector which concerns on 1st Embodiment. It is a figure which shows the brightness | luminance gradient process in the projection image of the 2nd projection mode which concerns on 1st Embodiment. It is a figure which shows the projection state in the 2nd projection mode of the projector which concerns on 1st Embodiment. It is a figure which shows the projection state in 2nd projection mode of the projector which concerns on 2nd Embodiment. It is a figure which shows the side surface of the projector which concerns on 3rd Embodiment. It is a figure which shows the projection state in 2nd projection mode of the projector which concerns on 3rd Embodiment.

  The projector according to the first embodiment will be described below with reference to the drawings. FIG. 1 is a perspective view showing an appearance of the projector according to the first embodiment. The projector 2 includes a housing 4 made of metal or plastic, and a projection that emits projection light from a projection unit 20 (see FIG. 2) as a projection unit built in the housing 4 on the front surface 6 of the housing 4. A rectangular plate-like body that protects the projection window 8 when the photographing window 10 and the projector unit 20 are not used when the subject light is incident on the window 8 and the imaging unit 44 (see FIG. 3) built in the housing 4. A protective member 12 is provided. Here, the protection member 12 is configured to be rotatable to a predetermined angle with one side of the protection member 12 as a rotation shaft 12a.

  Further, an illuminance sensor 15 for measuring the illuminance of the installation environment of the projector 2, a power switch 16a, a shutter button 16b for instructing photographing, a projection button 16c for performing projection, and a first projection mode to be described later are provided on the upper surface 14 of the housing 4. Alternatively, a mode setting button 16d for setting either one of the second projection modes is provided. Here, the power switch 16 a, the shutter button 16 b, the projection button 16 c, and the mode setting button 16 d constitute the upper operation unit 16. Further, a lower operation unit 17 (see FIG. 4) including switches and buttons similar to the upper operation unit 16 is provided on the lower surface of the housing 4. Further, a tripod 18 as a support member for supporting the housing 4 is mounted on the lower surface of the housing 4 when performing projection in at least a second projection mode described later. As will be described later, the tripod 18 has a function as an attitude detection unit that detects the attitude of the projector 2 and determines whether or not it is projected obliquely.

  FIG. 2 is a cross-sectional view showing an internal configuration of the projection unit 20 according to the first embodiment. In FIG. 2, the lower side of the drawing is the front of the projection unit 20. Projection light emitted from the LED 22 serving as a light source for emitting projection light is converted into parallel light by the condenser lens group 24 and then enters a PBS (polarization beam splitter) 26, and 45 in the traveling direction of the incident light. The light is incident on the polarization separation film 26a provided at an angle of °. Of the projection light incident on the polarization separation film 26a, only S-polarized light is reflected by the polarization separation film 26a and enters the LCOS 28 serving as an image display unit. On the other hand, the P-polarized light that has passed through the polarization separation film 26 a is absorbed by the PBS 26.

  The light incident on the LCOS 28 is reflected by the LCOS 28 and enters the PBS 26 again. Here, a liquid crystal layer (not shown) constituting the LCOS 28 functions as a phase plate for incident light when a voltage is applied. Therefore, of the light emitted from the LCOS 28, the light transmitted through the pixel region to which a voltage is applied by the liquid crystal layer is converted from S-polarized light to P-polarized light. On the other hand, of the light emitted from the LCOS 28, the light transmitted through the pixel region to which no voltage is applied by the liquid crystal layer proceeds as S-polarized light.

  Of the light emitted from the LCOS 28 and reentering the PBS 26, only the P-polarized light that has passed through the pixel region to which the voltage of the LCOS 28 has been applied passes through the polarization separation film 26a and is separated from the S-polarized light. The P-polarized light is emitted from the projection unit 20 via the projection lens group 30 for projecting the projection image, and is projected onto the projection surface via the projection window 8 provided on the front surface 6 of the housing 4 of the projector 2. Projected.

  FIG. 3 is a block diagram showing a configuration of the projector 2 according to the first embodiment. The projector 2 includes a CPU 40 as a control unit. The CPU 40 does not show an illuminance sensor 15, an upper operation unit 16, a lower operation unit 17, an imaging unit 44 that images subject light, and an imaging signal output from the imaging unit 44. A storage unit 46 that stores image data generated by A / D conversion in the A / D conversion unit is connected. Further, a memory card 48 that stores captured images and projection images and a projection unit 20 that projects images based on image data are connected. An image processing unit 50 that performs image processing such as vertical / horizontal conversion processing, vertical / horizontal ratio changing processing, and luminance gradient correction is connected to the image data of the image to be projected. Here, the projection unit 20 includes a power supply control unit 52 that turns on and off the LED 22 that is a light source, and a projection control unit 54 that inputs arbitrary image data for projection to the LCOS 22 and performs display control of the LCOS 22. As will be described later, the CPU 40 has a function as a projection range setting unit that sets a projection range of an image by the projection unit 20.

  Next, projection in the first projection mode of the projector 2 according to the first embodiment will be described with reference to the drawings. FIG. 4 is a diagram showing a projection state in the first projection mode of the projector 2 according to the first embodiment. As shown in FIG. 4, a tripod 18 is attached to the bottom surface of the projector 2, and the projector 2 is installed at an optimal projection distance from the projection surface 60 in a state in which a projection image is projected perpendicularly to the projection surface 60. Installed on surface 62. When projecting an image in the first projection mode, the projector 2 may be directly installed on the installation surface 62 without using the tripod 18 to project the image. Further, the protective member 12 of the projector 2 is rotated by a predetermined angle around the rotation axis 12a by the operator's manual operation to expose the projection window 8 of the housing 4.

  Here, when the projection mode of the projector 2 is set to the first projection mode by the operation of the mode setting button 16d by the operator, the CPU 40 projects the image data stored in the memory card 48 in the first projection mode. To do. That is, the projection light is projected so that the angle α formed by the projection optical axis of the projection light projected from the projection window 8 of the projector 2 and the projection plane 60 is approximately 90 degrees. In this case, a projection image 64 “ABC” having a resolution of 640 × 480 pixels, for example, as shown in FIG.

  Next, projection in the second projection mode of the projector 2 according to the first embodiment will be described with reference to the drawings. FIG. 5 is a diagram showing a projection state of the projector 2 in the second projection mode. In the second projection mode, the projection light is emitted obliquely with respect to the projection surface. As shown in FIG. 5, a tripod 18 is attached to the bottom surface of the projector 2. In addition, the projector 2 is configured such that an angle β formed by the projection optical axis of the projection light from the projection window 8 of the projector 2 and the installation surface 62 (hereinafter also referred to as the projection surface 62) is a predetermined angle set in advance. Is installed on the installation surface 62 in a tilted state. Further, the operator manually exposes the projection window 8 of the housing 4. Here, when the projection mode of the projector 2 is set to the second projection mode by the operation of the mode setting button 16d by the operator, the CPU 40 performs an image projection from the image data stored in the memory card 48. Data is read out, and the image processing unit 50 performs image processing such as vertical / horizontal resolution changing processing, vertical / horizontal conversion processing, aspect ratio changing processing, and luminance gradient correction on the image data. For example, in the vertical / horizontal resolution changing process, the vertical / horizontal direction is changed with respect to the image data to be projected on the basis of 480 pixels which is the resolution of the height of the image data before the image processing is performed. Convert from 640x480 pixels to 480x360 pixels. In the image processing, although not particularly limited, the image processing is performed so that the aspect ratio of the image data before the image processing is the same as the aspect ratio of the image data after the image processing. Further, the image processing unit 50 performs image processing on the image data so that the image can be projected onto the rectangular projection range 67 determined based on the brightness of the projection surface of the projection area 68. Then, the projection light is projected obliquely from the projection window 8 of the projector 2 onto the installation surface 62, and a rectangular projection image 66 (see FIG. 6A) is displayed on the installation surface 62.

  Here, the projection range 67 in the projection area 68 of the projection image of the projector 2 in the second projection mode will be described. FIG. 6A shows a projection image 66 projected on the projection range 67 in the second projection mode. The projection area 68 is an illumination area on the projection surface 62 that is illuminated by the projection light emitted from the projector 2. The projection area 68 is defined by the height from the installation surface 62 of the projector 2, the angle β formed by the projection optical axis and the installation surface 62, the brightness of the projection lens group 30 and the light source of the projector 2, and the like. In the second projection mode, since the projection light is irradiated obliquely with respect to the projection plane, the projection area 68 has a trapezoidal shape having a predetermined projection distance at the height as shown in FIG. And the side of the projection area 68 where the distance from the casing 4 to the projection plane 62 is short (the distance from the projection lens group 30 to the projection plane is short) is a trapezoidal short side. The side with the long distance to the projection surface 62 (the distance from the projection lens group 30 to the projection surface is long) is the long side of the trapezoid. The projection range 67 is an image area set on the housing 4 side in the projection area 68, and a desired image is projected into the projection range 67. In FIG. 6A, the projection image 66 is made to coincide with the projection range 67. Regarding the setting of the projection range 67, the second projection mode is different from the first projection mode in which the projection region 68 and the projection range 67 coincide. In the second projection mode, as in the first mode, when projection is performed so that the projection range 67 coincides with the projection area 68, not only does the projection image have shape distortion such as trapezoidal distortion, but also an image that extends in the horizontal direction. It becomes. Further, in the projection area 68, the projection image has a luminance variation on the side closer to the projection lens (the right side in FIG. 6A) and the side far from the projection lens (the left side in FIG. 6A). The area far from the lens is darker than the area near the projection lens. Therefore, in the projection mode 2, the image processing unit 50 performs the above-described vertical / horizontal resolution change processing and vertical / horizontal conversion on the image data in accordance with the size and shape of the projection range 67 in order to match the projection image with the projection range 67. Processing and aspect ratio change processing are performed. Specifically, image processing is performed on the image data so as to match the region on the LCOS 28 corresponding to the projection range 67. Then, the image data whose resolution is changed is displayed in the area on the LCOS 22. In the image processing, although not particularly limited, the image processing is performed so that the aspect ratio of the image data before the image processing is the same as the aspect ratio of the image data after the image processing. Note that the display of the LCOS 28 may be controlled so that the other areas on the LCOS 28 where the image data whose resolution or the like has been changed are not displayed are displayed in black.

  The projection area 68 varies depending on the height from the installation surface 62 of the projector 2, the angle β formed between the projection optical axis and the installation surface 62, the state of the projection lens group 30 of the projector 2, and the like. It is variable according to. In that case, the image processing unit 50 performs the above-described image processing on the image data according to the set projection range 67. By performing such control, it is possible to project an image with high image quality while using the projection range 67 to the maximum.

  The projected image 66 shown in FIG. 6A is obtained by projecting image data in which shape distortion such as trapezoidal distortion is corrected by the image processing unit 50. The shape distortion correction is realized by a known method.

  FIG. 6B shows the relationship between the projection distance in the projection region 68 and the brightness of the projection surface. FIG. 6C shows a luminance gradient attached to the image data. FIG. 6D shows the relationship between the projection distance in the projection region 68 and the luminance of the projection plane when the luminance gradient process is performed on the image data.

  When the shutter button 16b is pressed by the operator while the projection light is being projected in the second projection mode shown in FIG. 5, the CPU 40 images the projection area 68 by the imaging unit 44, and the projection range setting unit Thus, the projection possible distance from the projector 2 side in the projection area 68 that can be used as the projection range 67 in the projection area 68 is determined based on the imaging data. That is, when the brightness of the projection plane of the imaged projection area 68 is the value 72 shown in FIG. 6B, the projection distance in which the brightness of the projection plane is equal to or greater than the predetermined value S is projected in the projection area 68. As a possible distance, a projection image 66 is displayed in a rectangular projection range 67 within the projection possible distance of the projection area 68 as shown in FIG. The predetermined value S may be set, for example, so that the contrast of the projection image 66 in the projection range 67 is appropriate compared with the brightness of the ambient light. In addition, the image processing unit 50 executes luminance gradient processing for adding a luminance gradient to the image data so that the luminance in the projection range 67 of the projection image 66 is substantially uniform. Specifically, as shown in FIG. 6C, a luminance gradient process for applying a luminance gradient 74 is performed so that the distance from the housing 4 to the projection surface 62 increases from the short side toward the long side. . The luminance gradient 74 is set based on the luminance data of the projection range 67 in the projection area 68 imaged by the imaging unit 44. Accordingly, as shown in FIG. 6D, the luminance in the projection range 67 of the projection image 66 that has been subjected to the luminance gradient processing is substantially uniform.

  According to the projector according to the first embodiment, when projection light is projected obliquely downward with respect to the installation surface of the projector, the projection range is determined based on the brightness of the projection area, and the projection is performed. Since image processing such as vertical / horizontal conversion processing, resolution conversion processing, and luminance gradient processing is performed on the image data, an image can be projected on the installation surface with high image quality.

  In the above-described embodiment, the projection area 68 is imaged by the imaging unit 44, and the projection range 67 of the projection image 66 is determined inside the projection area 68 based on the luminance information of the projection plane in the captured image. However, the projection range 67 may be determined based on the support state of the projector by the tripod 18 and the detection result by the illuminance sensor 15. That is, the projector 2 is installed on the installation surface 62 while being tilted by the tripod 18 so that the angle β shown in FIG. 5 becomes a predetermined angle, and the projector is operated by operating the mode setting button 16d by the operator. When the second projection mode is set to the second projection mode, the CPU 40 detects the brightness of the ambient light in the installation environment of the projector 2 by the illuminance sensor 15. Then, based on the brightness detected by the illuminance sensor 15, the height of the tripod 18, the angle β, the brightness of the light source of the projector 2, and the like, the projection range 67 in the projection area 68 is determined. In addition, it is good also as a structure which sets a projection mode according to the attitude | position of the projector 2 detected by the tripod 18 as an attitude | position detection part. In this case, if the posture detection unit detects that the projection is an oblique projection projected at an angle β, the CPU 40 determines that it is in the second projection mode and performs the above-described control. As described above, when the projection mode is switched based on the detection result of the posture detection unit, the operator does not need to operate the mode setting button 16d.

  In the above-described embodiment, the projection area 68 is imaged by the imaging unit 44, and the projection range of the projection image 66 is determined inside the projection area 68 based on the luminance information of the projection plane in the captured image. However, the projection range 67 of the projection image 66 may be determined based on a preset brightness gradient 74. That is, when the gradient of the luminance gradient 74 is set large, the projection range 67 of the projection image 66 can be enlarged by the luminance gradient processing by the image processing unit 50. On the other hand, when the gradient of the luminance gradient 74 is set to be small, the projection range 67 of the projection image 66 by the luminance gradient processing of the image processing unit 50 becomes small.

  In the above-described embodiment, the data compression rate or the data expansion rate may be changed along at least one of the vertical and horizontal directions of the image data. That is, the CPU 40 causes the image processing unit 50 to gradually change at least one data compression rate or data expansion rate in the vertical and horizontal directions with respect to image data to be projected in the image data stored in the memory card 48. Implement the process. In this case, based on the brightness of the projection surface in the projection area 68, the area projected to be used as the projection range 67 can be used to the maximum to project an image. Note that the image processing unit 50 may perform brightness gradient processing on the image data of the projection image based on the data compression rate or data expansion rate.

  In the above-described embodiment, the projection range 67 of the projection image 66 is determined based on the brightness of the projection region 68, but the projection image 67 is determined based on the depth of focus of the projection lens group 30 of the projection unit 20. 66 projection ranges 67 may be determined. That is, when the projection mode of the projector 2 is set to the second projection mode by the operation of the mode setting button 16d by the operator, the projection is performed based on the area defined by the front focal depth a and the rear focal depth b shown in FIG. A projection range 67 of the image 66 is determined. In this case, the projector 2 includes an automatic focus adjustment mechanism that performs focus adjustment, and when performing projection in the second projection mode, the front focus position of the projection lens group 30 is set to the housing of the projection range 67 by the automatic focus adjustment mechanism. Match to one side of 4 sides.

  In the above-described embodiment, the LED 22 is used as the light source for illuminating the LCOS 28 in the projection unit 20, but a laser light source may be used. Thereby, it is possible to perform projection with a deep focal depth.

  Next, a projector according to a second embodiment of the invention will be described. The configuration of the projector according to the second embodiment will be described with respect to different parts because the configuration of the projector 2 and the protection member 12 shown in FIG. 1 and the tripod 18 that supports the housing 4 are different. In the projector according to the second embodiment, the same reference numerals are used for the same components as those of the projector according to the first embodiment.

  FIG. 8 is a diagram illustrating a projection state in the second projection mode of the projector 2 according to the second embodiment. As shown in FIG. 8, a rod-like support member 80 that supports the projector 2 at a predetermined angle is provided at the lower portion of the housing 4. Accordingly, the projector 2 is placed on the installation surface 62 so that the angle θ formed by the projection optical axis of the projection light from the projection window 8 of the projector 2 and the installation surface 62 is a predetermined angle less than 90 degrees set in advance. Installed. Further, the protective member 12 of the projector 2 is rotated by a predetermined angle around the rotation axis 12a to expose the projection window 8 of the housing 4. A rectangular mirror 12 b that reflects the projection light from the projection unit 20 is provided on the surface of the protection member 12 that faces the projection window 8. In addition, the housing 4 is provided with a posture detection unit (not shown) that detects that the support member 80 has been pulled out to a position where it can support the housing 4 at a predetermined angle.

  Here, when the projection button 16c is pressed by the operator, the CPU 40 detects whether or not the support member 80 is pulled out to a predetermined position by the posture detection unit, and pulls out the support member 80 to the predetermined position. If so, the projection mode of the projector 2 is set to the second projection mode. The illuminance sensor 15 detects the brightness of the ambient light in the installation environment of the projector 2. Further, the image processing unit 50 reads out image data to be projected from the image data stored in the memory card 48, and performs image processing such as vertical / horizontal conversion processing and resolution conversion processing on the image data. Furthermore, a rectangular projection range 82 determined based on the brightness detected by the illuminance sensor 15 by the image processing unit 50, the height of the mirror 12b of the protection member 12, the angle θ, the brightness of the light source of the projector 2, and the like. Then, image processing such as luminance gradient processing is performed on the image data so that the image can be projected on the screen. Then, the projection light projected from the projection window 8 is reflected at a predetermined angle by the mirror 12b, and the installation surface 62 is set such that the angle formed by the projection optical axis of the reflected projection light and the installation surface 62 is a predetermined angle θ. The projected image 82 is projected obliquely.

  On the other hand, when the support member 80 is not pulled out to a predetermined position, the projection mode of the projector 2 is set to the first projection mode, and the image data stored in the memory card 48 is projected in the first projection mode. . As described above, when the projection mode is switched based on the detection result of the posture detection unit, the operator does not need to operate the mode setting button 16d.

  According to the projector according to the second embodiment, when projecting light is projected obliquely downward with respect to the installation surface of the projector, the projection range is determined based on the brightness of the projection area, and the projection is performed. Since image processing such as vertical / horizontal conversion processing and resolution conversion processing is performed on the image data, a projected image can be projected on the installation surface with high projection image quality.

  Next, a projector according to a third embodiment of the invention will be described. Note that the configuration of the projector according to the third embodiment is different from the configuration of the projector 2, the protection member 12, and the projection unit 20 shown in FIG. In the projector according to the third embodiment, the same reference numerals are used for the same components as those of the projector according to the second embodiment.

  FIG. 9 is a diagram illustrating a side surface of the projector 2 according to the third embodiment. A support member 90 that supports the protection member 12 shown in FIG. 9 is provided in the housing 4 so as to be housed. Further, the protection member 12 is provided on the support member 90 so as to be rotatable around the rotation shaft 12a. The projection unit 20 uses a shift optical system that shifts the projection optical axis of the projection light from the projection window 8 in the direction of the arrow in FIG. The projection light is bent in the shift direction of the optical axis of the shift optical system by a mirror 12b provided as in the third embodiment.

  FIG. 10 is a diagram illustrating a projection state in the second projection mode of the projector 2 according to the third embodiment. As shown in FIG. 10, the projector 2 is supported by the support member 80 so that the angle γ formed by the projection optical axis of the projection light from the projection window 8 of the projector 2 and the installation surface 62 is a predetermined angle of less than 90 degrees. In this state, it is installed on the installation surface 62. The case 4 is provided with a posture detection unit (not shown) that detects that the support member 80 is pulled out to a position where the support member 80 can support the case 4 at a predetermined angle. Further, the protective member 12 (mirror 12b) is disposed using the support member 90 so that the projection light from the projection window 8 is reflected at a predetermined angle by the operator's manual operation. The projection area 92 projected onto the installation surface 62 and the protection member 12 (mirror 12b) are arranged at positions that do not overlap in the normal direction of the installation surface 62.

  Here, when the projection button 16c is pressed by the operator, the CPU 40 determines whether or not the support member 80 is pulled out to a predetermined position by the posture detection unit, and pulls out the support member 80 to the predetermined position. If so, the projection mode of the projector 2 is set to the second projection mode. The illuminance sensor 15 detects the brightness of the ambient light in the installation environment of the projector 2. Further, the image processing unit 50 reads out image data to be projected from the image data stored in the memory card 48, and performs image processing such as vertical / horizontal conversion processing and resolution conversion processing on the image data. Furthermore, a rectangular projection range 94 determined based on the brightness detected by the illuminance sensor 15 by the image processing unit 50, the height of the mirror 12b of the protection member 12, the angle γ, the brightness of the light source of the projector 2, and the like. Then, image processing such as luminance gradient processing is performed on the image data so that the image can be projected on the screen. Then, the projection light projected from the projection window 8 is reflected at a predetermined angle by the mirror 12b, and the installation surface 62 is set such that the angle formed by the projection optical axis of the reflected projection light and the installation surface 62 is a predetermined angle γ. A projected image is projected onto the screen.

  On the other hand, when the support member 80 is not pulled out to a predetermined position, the projection mode of the projector 2 is set to the first projection mode, and the image data stored in the memory card 48 is projected in the first projection mode. .

  According to the projector according to the third embodiment, when the projection light is obliquely projected obliquely downward with respect to the installation surface of the projector, the projection range is determined based on the brightness of the projection area, and the projection is performed. Since image processing such as vertical / horizontal conversion processing and resolution conversion processing is performed on the image data of the image, a projected image can be projected on the installation surface with high projection image quality.

  In the above-described embodiment, either the upper operation unit 16 or the lower operation unit 17 is enabled depending on whether the first projection mode is set or the second projection mode is set. You may do it. As described above, when the projection mode is switched based on the detection result of the posture detection unit, the operator does not need to operate the mode setting button 16d.

  Further, in the above-described embodiment, the projection mode of the projector 2 is set based on the detection result by the posture detection unit that detects the state of the support member 80. However, instead of this configuration, the tilt sensor and the angle are set. A sensor or the like may be provided as a posture detection unit and set based on a detection result by them. That is, the projector 2 is provided with a tilt sensor, a range of a predetermined angle is set in advance, and the first projection mode or the second projection mode is set based on the detection result by the tilt sensor.

  In the above-described embodiment, the projector 2 projects the image after being placed on the installation surface 62. However, the present invention is not limited to this, and the image is projected while being held by the user. May be. In this case, switching between the first projection mode and the second projection mode may be performed by the mode setting button 16d, or may be automatically performed based on the detection result by the posture detection unit such as the inclination sensor or the angle sensor. Also good.

  In the above-described embodiment, the projector 2 is configured to be able to set the first projection mode and the second projection mode, but is not limited to this. It is good also as the projector 2 which does not have 1st projection mode but respond | corresponds only to diagonal projection.

  DESCRIPTION OF SYMBOLS 2 ... Projector, 4 ... Housing | casing, 15 ... Illuminance sensor, 16 ... Upper operation part, 16d ... Mode setting button, 18 ... Tripod, 20 ... Projection unit, 28 ... LCOS, 50 ... Image processing part, 60 ... Projection surface, 62 ... Installation surface.

Claims (18)

A projection unit that projects an image based on the image data displayed on the display unit;
A housing that houses the projection unit;
Of the projection area on the projection plane of the projection light emitted from the projection unit, a projection range setting unit that sets a projection range on the housing side;
An image processing unit that performs image processing on image data input to the display unit based on the projection range set by the projection range setting unit;
A projector comprising:   The projector according to claim 1, wherein the image processing unit changes a vertical resolution and a horizontal resolution of an image displayed on the display unit.   The projector according to claim 2, wherein the image processing unit changes a vertical and horizontal direction of an image displayed on the display unit.   The projector according to claim 1, wherein the projection range setting unit determines a projection range of an image by the projection unit based on brightness of the projection plane. An imaging unit for imaging the projection area;
The projector according to claim 1, wherein the projection range setting unit determines the projection range based on imaging data obtained by the imaging unit. It has a detector that detects the brightness of ambient light,
The projector according to claim 1, wherein the projection range setting unit determines the projection range based on brightness of ambient light detected by the detection unit.   The projector according to claim 1, wherein the image processing unit adds a luminance gradient to image data of an image displayed on the display unit.   The said projection range setting part determines the said projection range based on the preset brightness | luminance gradient attached | subjected with respect to the image data of the image displayed on the said display part. The projector according to one item.   The projector according to claim 2, wherein the image processing unit changes a data compression rate or a data expansion rate in at least one of vertical and horizontal directions of image data of an image displayed on the display unit.   The projector according to claim 9, wherein the image processing unit adds a luminance gradient to the image data based on the data compression rate or the data expansion rate. The light source that illuminates the display unit in the projection unit is an LED light source or a laser light source,
The projector according to claim 1, wherein a projection range of an image by the projection unit is determined based on a depth of focus of the projection optical system.   The projector according to claim 11, further comprising: a focus adjustment mechanism that performs focus adjustment so that a front focal position of the projection optical system coincides with one side of the projection range on the housing side. The housing includes a reflection member that reflects the projection light emitted from the projection unit,
The projector according to claim 1, wherein the reflection member functions as a protection member for a projection optical system of the projection unit. An attitude detection unit for detecting the installation state of the housing;
The projector according to claim 1, wherein the projection range setting unit sets a projection range based on a detection result by the posture detection unit. The projection optical system is a shift optical system,
15. The projector according to claim 13, wherein the reflection member bends the optical path of the projection light in a shift direction of the optical axis of the shift optical system.   16. A support member for supporting the casing so that an angle formed by a projection optical axis of projection light emitted from the projection unit and an installation surface is less than 90 degrees. The projector according to one item.   The projector according to any one of claims 13 to 16, wherein the projection range of the image by the projection unit and the reflecting member are arranged at positions that do not overlap in the normal direction of the installation surface.   18. The image processing unit according to claim 1, wherein the image processing unit performs image processing so that an aspect ratio of image data before image processing is the same as an aspect ratio of image data after image processing. The projector according to one item.

Images