JP2005208136A - Projector, projection method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To project and display an image always appropriate in a vertical relation by taking an aspect ratio etc., of the image to be projected into consideration when an apparatus casing is vertically or horizontally placed by being rotated around the optical axis of projection. <P>SOLUTION: The projector is equipped with: a length and breadth sensor 43 which detects the attitude of the apparatus casing; a controller 40 which converts the size of the image after subjecting the image developed and stored in a video RAM 34 to rotation processing based on the result of the detection obtained by the sensor 43; a display encoder 33 which projects and displays the image converted in the size; and a projection system including a display driving section 35, a spatial optical modulator (SOM) 36, a light source lamp 37, and a projection lens 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projection apparatus, a projection method, and a program having a rotation function of a projection image.

Conventionally, the device has a tilt sensor, and the device is installed horizontally so that the projection optical axis is substantially horizontal, and the device is installed vertically so that the projection optical axis is substantially anti-gravity. By detecting the case and reflecting the projected image inverted in the vertical position forward by a mirror like an overhead projector device, the image is projected in the same direction (substantially horizontal direction) regardless of the installation posture. Projector devices are being considered. (For example, Patent Document 1)
JP 2001-154262 A

  The technique described in the above-mentioned patent document 1 is substantially the same as the horizontal position in the projection optical axis on the screen, assuming that the projector is installed in a vertical state in which the optical axis projected from the apparatus is in the antigravity direction. It is reflected by a mirror so as to be horizontal.

  Therefore, for example, due to restrictions on the installation space of the projector device, the state where the device housing is installed vertically or horizontally while maintaining the orientation of the projection lens and the projection optical axis in a substantially horizontal direction, in other words, the projection A state in which the apparatus housing is rotated about the projection optical axis from the lens and installed vertically or horizontally is not assumed.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide an image to be projected when the apparatus housing is rotated vertically or horizontally about the projection optical axis. It is an object of the present invention to provide a projection device, a projection method, and a program capable of always projecting and displaying an image having an appropriate vertical / horizontal relationship in consideration of an aspect ratio and the like.

  According to the first aspect of the present invention, detection means for detecting the attitude of the apparatus housing, rotation means for rotating the image to be projected based on the detection result obtained by the detection means, and rotation processing by the rotation means. The image processing apparatus includes a size conversion unit that converts the size of the image and a projection unit that projects and displays the image whose size has been converted by the size conversion unit.

  According to a second aspect of the present invention, there is provided a detecting means for detecting the attitude of the apparatus housing and an optical image forming element for forming a light image of an image to be projected from the light source based on the detection result obtained by the detecting means. Rotating means for rotating with respect to the optical axis of irradiation light, and projecting means for projecting and displaying an image using an optical image forming element rotated by the rotating means are provided.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the detection means is a vertical / horizontal sensor that detects a vertical / horizontal direction of the apparatus housing around an optical axis projected by the projection means. And

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the detection means is a switch that is turned on / off depending on a mounting direction of the apparatus housing.

  According to a fifth aspect of the present invention, in the first aspect of the invention, the projection unit variably sets a projection display position of an image whose size has been converted by the size conversion unit.

  The invention described in claim 6 is a detection step for detecting the attitude of the apparatus housing, a rotation step for rotating the image to be projected based on the detection result obtained in the detection step, and a rotation processing in the rotation step. A size conversion step of converting the size of the image and a projection step of projecting and displaying the image whose size has been converted by the size conversion step.

  The invention according to claim 7 is a program executed by a computer built in the projection apparatus for projecting and displaying an image, based on a detection step for detecting the attitude of the apparatus housing, and a detection result obtained in this detection step. A rotation step for rotating the image to be projected, a size conversion step for converting the size of the image rotated in the rotation step, and a projection step for projecting and displaying the image whose size has been converted in the size conversion step. Is executed by a computer.

  According to the first aspect of the present invention, when the apparatus housing is rotated around the projection optical axis to be placed vertically or horizontally, the image size is adjusted in consideration of the aspect ratio of the image to be projected. In addition, it is possible to always project and display an image having an appropriate vertical / horizontal relationship.

  According to the second aspect of the present invention, when the apparatus casing is rotated about the projection optical axis to be placed vertically or horizontally, the vertical / horizontal relationship is always appropriate without changing the size of the projected image. It is possible to project and display a simple image.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is possible to accurately grasp in which rotation direction the apparatus housing is installed vertically or horizontally. .

  According to the invention of claim 4, in addition to the effect of the invention of claim 1 or 2, for example, a simple on / off operation having an operation section slightly longer than the length of the leg portion in the vicinity of the leg portion of the apparatus, for example. By disposing the switch, it is possible to easily determine whether or not the leg is in the installation posture. Therefore, it is possible to realize a device that performs the projection according to the installation posture at a lower cost by simplifying the structure.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 1, it is possible to vary the projection display position of the image whose size is arbitrarily converted according to the installation environment and the user's preference. it can.

  According to the sixth aspect of the present invention, when the apparatus housing is rotated about the projection optical axis to be placed vertically or horizontally, the image size is adjusted in consideration of the aspect ratio of the image to be projected. In addition, it is possible to always project and display an image having an appropriate vertical / horizontal relationship.

  According to the seventh aspect of the present invention, when the apparatus housing is rotated about the projection optical axis to be placed vertically or horizontally, the image size is adjusted in consideration of the aspect ratio of the image to be projected. In addition, it is possible to always project and display an image having an appropriate vertical / horizontal relationship.

  Hereinafter, an embodiment in which the present invention is applied to a projector apparatus will be described with reference to the drawings.

  FIG. 1 shows an external configuration of a projector apparatus 10 according to the embodiment. FIG. 1 (A) is mainly arranged on the front and top surfaces of the housing, and FIG. 1 (B) is arranged on the back and bottom surfaces of the housing. Indicates.

  As shown in FIG. 1A, a projection lens 12, two pairs of phase difference sensors 131 and 132, and a front cover 14 are disposed on the front surface of a rectangular parallelepiped main body casing 11.

  The projection lens 12 is for projecting a light image formed by a spatial light modulation element such as a micromirror element to be described later. Here, the focus position and the zoom position (projection angle of view) can be arbitrarily changed. Shall.

  The phase difference sensors 131 and 132 measure the distance to the subject, specifically the distance to the projection image plane, based on the principle of triangulation from the parallax with respect to the subject image.

  Specifically, the distance to the subject in the vertical direction is measured by a pair of phase difference sensors 131 arranged vertically, and the distance to the subject in the horizontal direction is measured by another pair of phase difference sensors 132 arranged horizontally. To do.

  The front cover 14 is manually slid left and right to protect the projection lens 12 and the phase difference sensors 131 and 132 when the projector apparatus 10 is not being projected, particularly when being carried, and has a phosphorescent surface on the surface side. A ring 15, an Ir receiver 16, and a slide bar 17 are provided.

  The phosphorescent ring 15 is formed by embedding a resin ring containing a translucent phosphorescent material in the front cover 14, with the front cover 14 closed and the projection lens 12 and the like not visible from the outside. While it is possible to determine whether or not the light source lamp of the projector apparatus 10 is turned on and light is emitted from the projection lens 12, it emits faint light even after the light source lamp is turned off by the above-described phosphorescent material. The position can be seen even in a dim environment, and it is an accent on the design of the flat front cover 14.

  The Ir receiver 16 receives infrared light (Ir) on which a key operation signal from a remote controller of the projector device 10 (not shown) is superimposed.

  The slide bar 17 is a band-shaped protrusion made of, for example, plated stainless steel, embedded in the front cover 14, and serves as a clue when the front cover 14 is slid in the directions of the arrows A and B. Like the ring 15, it also serves as an accent on the design of the flat front cover 14.

A key / indicator portion 18 and a speaker 19 are disposed on the upper surface of the main body casing 11.
The key / indicator unit 18 includes various operation keys including a power key, a zoom key, a focus key, an input switching key, a menu key, up / down / left / right cursor keys, and an “Enter” key, and a power / standby state and temperature. An indicator for displaying an abnormality or the like by blinking / lighting of the LED is provided.
The speaker 19 outputs a loud sound when reproducing a moving image.

As shown in FIG. 1B, an input / output connector portion 20, an Ir receiving portion 21, and an AC adapter connecting portion 22 are disposed on the back surface of the main body casing 11.
The input / output connector unit 20 includes, for example, a USB terminal for connection with an external device such as a personal computer, a mini D-SUB terminal for video input, an S terminal, an RCA terminal, a stereo mini terminal for audio input, and the like. Become.

Similar to the Ir receiver 16, the Ir receiver 21 receives infrared light (Ir) on which a key operation signal from a remote controller (not shown) is superimposed.
The AC adapter connection unit 22 connects a cable from an AC adapter (not shown) serving as a power source.

  Further, on the lower surface of the main body casing 11, a pair of fixed leg portions 23, 23 are attached closer to the rear surface, and an adjustment leg portion 24 capable of height adjustment is attached closer to the front surface.

  The adjustment leg 24 manually adjusts the vertical component of the projection direction of the projection lens 12 and the photographing direction of the photographing lens 13, that is, the elevation angle, by manually operating the screw rotation position.

  In addition, a simple on / off switch 25 in which an operation piece having an axial length slightly longer than the axial length of the fixed leg portions 23, 23 is provided at substantially the center of the fixed leg portions 23, 23. To do. The on / off switch 25 is automatically turned on when the operation piece is brought into contact with the mounting position when the main casing 11 is placed horizontally using the fixed leg portions 23 and 23 and the adjusting leg portion 24.

  Next, the functional configuration of the electronic circuit of the projector apparatus 10 will be described with reference to FIG. In the figure, image signals of various standards input from the input / output connector unit 20 are unified into image signals of a predetermined format by the image conversion unit 32 via the input / output interface (I / F) 31 and the system bus SB. Later, it is sent to the display encoder 33.

  The display encoder 33 develops and stores the transmitted image signal in the video RAM 34, generates a video signal from the stored contents of the video RAM 34, and outputs the video signal to the display driving unit 35.

  The display driving unit 35 drives and displays a spatial light modulation element (SOM) 36 such as a digital mirror device at an appropriate frame rate, for example, 30 [frames / second], corresponding to the transmitted image signal. The spatial light modulator 36 is irradiated with high-intensity white light emitted from a light source lamp 37 such as an ultra-high pressure mercury lamp, so that an optical image is formed by the reflected light, and the projection lens 12 is And projected and displayed on a screen (not shown).

However, the projection lens 12 is driven by the lens motor (M) 38 to move the zoom position and the focus position on the optical axis as appropriate.
In addition, the spatial light modulator 36 is rotated by 90 ° about the center position of the image formation (center of the optical axis from the light source lamp 37) along the image formation surface by driving the motor 39 as necessary.

  The control unit 40 controls all the operations of the above circuits. The control unit 40 is composed of a CPU, a ROM that fixedly stores an operation program to be executed by the CPU including processing of attitude control described later, a RAM that is used as a work memory, and the like.

The control unit 40 is also connected to an image storage unit 41, an audio processing unit 42, a vertical / horizontal sensor 43, the on / off switch (SW) 25, and a distance measurement processing unit 44 via a system bus SB.
The image storage unit 41 is composed of, for example, a flash memory and stores image data such as a chart image for ranging up to the screen. The image storage unit 41 appropriately reads out the image data instructed by the control unit 40 and the display encoder 33. The images are projected and displayed by the projection lens 12.

The sound processing unit 42 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection display operation into an analog signal, and drives the speaker 19 to emit loud sounds.
The vertical / horizontal sensor 43 is in a position where the main body casing 11 of the projector device 10 is installed, specifically in a state where the vertical / horizontal sensor 43 is placed around the projection optical axis of the projection lens 12. , 23, the adjustment leg 24 and the on / off switch 25 are provided with the lower surface side installed horizontally, or the left side surface of the main casing 11 shown in FIG. It is detected whether it is placed or installed vertically with the right side surface of the main casing 11 shown in FIG. 1 (B) facing down, and the detection signal is output to the control unit 40.

  As described above, the on / off switch 25 is turned on when the lower surface side provided with the fixed leg portions 23, 23, the adjusting leg portion 24, and the on / off switch 25 is installed horizontally. The on / off state is appropriately monitored by the control unit 40.

  The distance measurement processing unit 44 drives the phase difference sensors 131 and 132 to measure the distance to an arbitrary point position in the projected and displayed chart image.

  The key operation signal in the key / indicator unit 18 is directly input to the control unit 40, and the control unit 40 directly lights / flashes each indicator of the key / indicator unit 18 while Infrared light reception signals from the Ir receiver 16 provided and the Ir receiver 21 provided on the back side of the main casing 11 are also directly input to the controller 40.

  The spatial light modulation element 36 has a rectangular display area having a predetermined aspect ratio, for example, vertical 3: horizontal 4, and when the main casing 11 is installed horizontally, the display area Display is performed using the entire area.

  Further, both the on / off switch 25 and the vertical / horizontal sensor 43 are not required, and either one of them can detect the installation state of the main body casing 11, and the operation will be described below. Separately described.

Next, the operation of the above embodiment will be described.
FIG. 3 shows an example of a process related to the orientation of the projected image executed by the control unit 40 when the power is turned on and an image signal is input from any of the connectors of the input / output connector unit 20 and the image is in a projected state. Here, it is assumed that the control based on the detection signal of the vertical / horizontal sensor 43 is executed, and the control is executed by the control unit 40 based on the operation program stored in the internal ROM.

  At the beginning of the process, it is determined whether or not the main body casing 11 is installed horizontally based on the detection output of the vertical / horizontal sensor 43 (step S01).

  Here, when it is determined that the main body casing 11 is installed horizontally so that the lower surface of the main body casing 11 on which the fixed leg portions 23 and 23 and the adjusting leg portion 24 are formed is down, the input is made. The displayed image signal is used as it is, and an image is displayed on each circuit of the display system including the display encoder 33, the video RAM 34, the display drive unit 35, and the spatial light modulator 36, and light from the light source lamp 37 is irradiated to the image. Then, an optical image is formed by the reflection term and is projected and displayed by the projection lens 12 (step S02).

  FIG. 4A illustrates a light image formed by the spatial light modulation element 36 in this horizontal state, and here, an image of the character string “ABC” is displayed. As shown in the figure, when the main body casing 11 is installed horizontally and used, the entire display area of the spatial light modulator 36 can be effectively used to project and display an image having an appropriate vertical / horizontal relationship. .

  If it is determined in step S01 that the main casing 11 is not installed horizontally, the main casing 11 is vertically positioned with the right or left side of the main casing 11 facing down, Based on the output of the vertical / horizontal sensor 43, the input image is rotated 90 ° to the right or left in accordance with the direction (step S03).

  For example, when it is determined by the detection output of the vertical / horizontal sensor 43 that the main body casing 11 is installed vertically with the right side face down and the left side face up, an image obtained by rotating the input image 90 ° leftward Are generated by the conversion process.

Next, the rotated image is subjected to size conversion, specifically, reduction processing corresponding to the aspect ratio of the display area of the spatial light modulator 36 (step S04).
That is, if the aspect ratio of the display area of the spatial light modulator 36 is vertical 3: horizontal 4, the input image is reduced at a reduction ratio of 75 [%], whereby the original image is reduced in area ratio. This is reduced to about 56.3 [%] (= (3/4) ² ).

  The image thus rotated and size-converted is developed in a predetermined area of the video RAM 34, for example, a half-right area on the left side of the original horizontally long image, and then projected and displayed. Even in the state of being installed, an image with an appropriate vertical / horizontal relationship and image aspect ratio is projected and displayed (step S05).

  FIG. 4B illustrates a light image formed by the spatial light modulation element 36 in a vertically placed state with the right side surface of the main body casing 11 facing down and the left side surface facing up. The image of the column “ABC” is displayed. As shown in the figure, when the main body casing 11 is installed in a vertical position, the spatial light modulation element 36 whose aspect ratio is originally determined to display a horizontally long image is used vertically, and the horizontally long image is displayed. In order to display, a reduced image is displayed. For this reason, a part of the display area of the spatial light modulator 36 is not used for display as the blank area BC, but it is still possible to project and display an image having an appropriate vertical / horizontal relationship.

  Regarding the processing of steps S03 to S05, the case where the main body casing 11 is used in a vertical state with the right side surface of the main body casing 11 facing down and the left side surface facing up has been described. Underneath, when used in a vertically placed state with the right side up, an image obtained by rotating the input image by 90 ° to the right is naturally generated by the conversion process in step S03, and this is sized in step S04. After the conversion, specifically the reduction process, the image is projected and displayed in step S05 after the image is developed in a predetermined area of the video RAM 34, for example, a little more than half of the right side of the original horizontally long image. In particular, even when the main casing 11 is installed vertically, an image in which the vertical / horizontal relationship and the aspect ratio of the image are appropriate is projected and displayed.

  As described above, the posture in which the main body casing 11 is installed according to the detection output from the vertical / horizontal sensor 43 in step S01, specifically the horizontal orientation, or the vertical orientation with the right side surface or the left side surface down. In accordance with the posture, the image is rotated, reduced, and displayed as necessary according to the posture repeatedly, so as to correspond to the posture in which the main body casing 11 is installed at that time. An image with an appropriate aspect ratio can be projected and displayed at all times.

  In the above-described embodiment, when the main casing 11 is installed vertically, the input image is rotated and reduced, and for example, as shown in FIG. Although described as being displayed at the position, the display position of the reduced image on the spatial light modulator 36 may be arbitrarily changed by a user operation.

  That is, the control unit 40 determines that the main casing 11 is in the vertical position in accordance with the detection output from the vertical / horizontal sensor 43 in step S01 and repeats the process of executing the processes in steps S03 to S05, while simultaneously repeating the process. The operation of the cursor movement key of the key / indicator unit 18 by the user is accepted, and the positions of the image display area and the blank area BC in the spatial light modulator 36 as shown by the arrow A in FIG. The movement may be set.

  By doing so, the projection display position of the image can be arbitrarily changed according to the usage environment of the projector apparatus 10 including the situation on the screen side to be projected and the user's preference.

  In the operation of the above embodiment, the main body casing 11 is installed horizontally based on the detection signal of the vertical / horizontal sensor 43, or is installed vertically with the right side surface of the main body casing 11 facing down, or the main body. It has been described that it is accurately determined whether the casing 11 is placed vertically with the left side face down.

  Thus, in the vertical orientation, in other words, from the horizontal orientation, it is determined in which direction the main casing 11 has been rotated 90 degrees around the projection optical axis, and the vertical orientation is set. In addition, the direction of the projection content can be appropriately switched.

  However, the vertical / horizontal sensor 43 has a high unit cost, and as shown in FIG. 1, the projection lens 12 and the key / indicator unit 18 which is an operation system member are either left or right (here, the main body). In the case of a device that is biased toward the left side of the casing 11, the vertical and horizontal sensors 43 are often installed so that they are on the upper side, including the relationship with the screen to be projected. Instead of this, a simpler and less expensive detection mechanism may be used.

  In the following, another operation example of the present invention will be described in which the installation posture of the main casing 11 is detected by the detection signal of the on / off switch 25 in place of the vertical / horizontal sensor 43 and the image to be projected and displayed is switched.

  In the other operation examples, the basic processing contents are almost the same as the contents shown in FIG. 3, so that the illustration is omitted and the same steps are denoted by the same reference numerals.

  That is, at the beginning of the process, it is determined whether or not the main casing 11 is installed horizontally depending on whether or not there is a detection output of the on / off switch 25 (step S01).

  Here, when it is determined that the main casing 11 is installed horizontally so that the lower surface of the main casing 11 on which the fixed leg portions 23 and 23 and the adjusting leg portion 24 are formed is on the bottom, Since the switch 25 is in contact with the installation location and is turned on, this is determined by the detection signal, and the display encoder 33, the video RAM 34, the display drive unit 35, and the input image signal are used as they are. An image is displayed by each circuit of the display system including the spatial light modulator 36, light from the light source lamp 37 is irradiated to form an optical image with a reflection term, and projected and displayed by the projection lens 12 (step S02). ).

If it is determined in step S01 that the on / off switch 25 is not turned on and the main casing 11 is installed vertically, the main casing 11 basically moves its right side surface. The input image is uniformly rotated 90 ° counterclockwise, assuming that the left side is placed vertically upward (step S03), and the rotated image is further converted into the spatial light modulation element 36. Size conversion, specifically reduction processing is performed in accordance with the aspect ratio of the display area (step S04).
The image thus rotated and size-converted is developed in a predetermined region of the video RAM 34, for example, a region slightly more than half on the left side of the original horizontally long image, and the spatial light modulation element 36 based on this develops the image shown in FIG. As a result, projection and display are performed as shown in FIG. 5B, and as a result, even when the main casing 11 is installed vertically, an image with an appropriate vertical / horizontal relationship and image aspect ratio is projected and displayed (step). S05).

  Thus, since it can be easily determined by the on / off switch 25 provided between the fixed leg portions 23, 23 whether or not the installation posture using the fixed leg portions 23, 23 and the adjusting leg portion 24 is used. Compared to the case where the vertical / horizontal sensor 43 is used, the structure can be further simplified, and the projector device 10 that performs projection control according to the installation posture can be realized at low cost.

  In the above-described embodiments, the case where the content of the image displayed on the spatial light modulator 36 is rotated and resized to be projected and displayed has been described. By reducing the image, the display area of the spatial light modulator 36 cannot be effectively used, and a blank area BC is generated.

  Therefore, when the spatial light modulator 36 is a transmissive element such as a liquid crystal display panel, or a reflective element such as a digital mirror device, the element itself is rotated along the display surface in the same manner. In the case where a light image can be formed, the installation state of the main casing 11 may be detected, the detection signal may be handled, and the spatial light modulator 36 may be rotated as necessary.

  The motor 39 is provided for that purpose, and instead of the process of rotating and resizing the display image, the spatial light modulator 36 itself is aligned with the center of the irradiation optical axis along the display surface. By rotating and driving so that the center point position of the display surface is not moved, the relationship between the vertical and horizontal directions is always maintained without changing the size of the image to be projected and displayed while effectively using the display area of the spatial light modulator 36. It is possible to project and display an appropriate image.

  Further, the spatial light modulation element 36 is not rotationally driven by the motor 39, but the arrangement position of the spatial light modulation element 36 is fixed, and an optical element such as a mirror or a prism is inserted in the projection optical path. It is also possible to arbitrarily rotate the projected and displayed image as being removable.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a perspective view showing an external configuration of a projector apparatus according to an embodiment of the present invention. 2 is a block diagram showing a functional configuration of the electronic circuit according to the embodiment. FIG. The flowchart which shows the processing content of the attitude | position control which concerns on the same embodiment. The figure which illustrates the image formed with a spatial light modulation element corresponding to the installation attitude | position of the main body casing which concerns on the embodiment. The figure which illustrates the image formed with the spatial light modulation element by the other operation example which concerns on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Main body casing, 12 ... Projection lens, 131, 132 ... Phase difference sensor, 14 ... Front cover, 15 ... Luminescent ring, 16 ... Ir receiving part, 17 ... Slide bar, 18 ... Key / indicator part , 19 ... Speaker (SP), 20 ... I / O connector, 21 ... Ir receiver, 22 ... AC adapter connection, 23 ... Fixed leg, 24 ... Adjustment leg, 25 ... On / off switch (SW) 31 ... Input / output interface (I / F), 32 ... Image conversion unit, 33 ... Display encoder, 34 ... Video RAM, 35 ... Display drive unit, 36 ... Spatial light modulation element (SOM), 37 ... Light source lamp, 38 ... Lens motor (M), 39 ... Motor (M), 40 ... Control unit, 41 ... Image storage unit, 42 ... Audio processing unit, 43 ... Vertical / horizontal sensor, 44 ... Ranging processing unit, BC ... Blank Pass, SB ... system bus.

Claims (7)

Detecting means for detecting the attitude of the device housing;
Rotation means for rotating the image to be projected based on the detection result obtained by the detection means;
A size converting means for converting the size of the image rotated by the rotating means;
A projection apparatus comprising: projection means for projecting and displaying an image whose size has been converted by the size conversion means. Detecting means for detecting the attitude of the device housing;
Based on the detection result obtained by this detection means, a rotation means for rotating a light image forming element that forms a light image of an image to be projected with respect to the optical axis of irradiation light from a light source,
A projection apparatus comprising: projection means for projecting and displaying an image using the optical image forming element rotated by the rotation means.   The projection apparatus according to claim 1, wherein the detection unit is a vertical / horizontal sensor that detects a vertical / horizontal direction of the apparatus housing around the optical axis projected by the projection unit.   The projection apparatus according to claim 1, wherein the detection unit is a switch that is turned on / off depending on a mounting direction of the apparatus housing.   The projection apparatus according to claim 1, wherein the projection unit variably sets a projection display position of the image whose size is converted by the size conversion unit. A detection step for detecting the attitude of the device housing;
A rotation step of rotating the image to be projected based on the detection result obtained in this detection step;
A size conversion step of converting the size of the image rotated in this rotation step;
And a projection step of projecting and displaying the image whose size has been converted in the size conversion step. A program executed by a computer incorporated in a projection apparatus for projecting and displaying an image,
A detection step for detecting the attitude of the device housing;
A rotation step for rotating the image to be projected based on the detection result obtained in this detection step;
A size conversion step for converting the size of the image rotated in this rotation step;
A program that causes a computer to execute a projection step of projecting and displaying an image whose size has been converted in the size conversion step.

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