JP2008046291A - Image projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an image projection device capable of switching a projected image at various aspect ratios and projecting it, capable of simultaneously projecting a plurality of projected images by one and the same projection device, provided with a function having a wider available range and made compact as a whole. <P>SOLUTION: The image projection device has: an image display element for displaying an original image; a projection optical system including an anamorphic optical element capable of turning with an optical axis as an axis of rotation and projecting the original image; an input means for inputting a display mode; and a switching means for switching the relative position of the anamorphic optical element to the image display element between a first position and a second position based on the input display mode. The device is equipped with a control means which sets the relative position of the anamorphic optical element to the image display element to the first position when the display mode is a mode in which a plurality of images are arranged side by side and displayed, and sets the above-mentioned relative position to the second position when the display mode is a mode in which only one image is displayed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image projection apparatus suitable for projecting image information displayed on an image display element such as a liquid crystal on a screen with various aspect ratios (width / height ratio of the screen).

  2. Description of the Related Art An image projection apparatus that enlarges and projects image information formed on an image display element such as a liquid crystal on a screen by a projection optical system is known. At this time, there is known an image projecting apparatus that projects by changing the aspect ratio of the projected image projected on the screen in various ways. (Patent Document 1).

  In Patent Document 1, an anamorphic lens is provided in a part of the projection optical system, and an image is projected such that the projection magnifications in the vertical direction and the horizontal direction are different.

Moreover, in patent document 1, the anamorphic lens which consists of a cylinder lens is used in a projection optical system, and the anamorphic lens is rotated 90 degree | times with respect to the optical axis of a projection optical system. Thus, the projection magnification in the vertical and horizontal directions is switched, and the projection image with an aspect ratio of 4: 3 and the projection image with an aspect ratio of 16: 9 are switched and projected.
Japanese Patent Laid-Open No. 08-253242

  Conventionally, an image projection apparatus capable of projecting images having different aspect ratios has only an effect of switching the aspect ratio of a projected image. That is, only the input signal format is projected so as to be displayed on the image display element without waste.

  Recently, there has been a demand for an image projection apparatus that can change the aspect ratio of a projection image and can project not only one projection image but also a plurality of projection images simultaneously on a screen.

  For this reason, a plurality of different image information is simultaneously projected on a screen using a plurality of image projection apparatuses.

  However, this method has a problem that the projection system becomes larger and heavier and is difficult to operate.

  The present invention can switch and project a projected image with various aspect ratios, and can simultaneously project a plurality of projected images with the same projection apparatus, and the entire apparatus having a function with a wider usage range can be obtained. An object is to provide a compact image projection apparatus.

The image projection apparatus of the present invention is
An image display element for displaying an original image;
A projection optical system that includes an anamorphic optical element rotatable about an optical axis, and projects the original image;
An input means for inputting a display mode;
An image projection apparatus having switching means for switching a relative position of the anamorphic optical element with respect to the image display element between a first position and a second position based on the input display mode;
When the display mode is a mode for displaying a plurality of images side by side, the relative position between the anamorphic optical element and the image display element is the first position, and the display mode displays only one image. In the case of the mode, control means is provided for setting the relative position between the anamorphic optical element and the image display element as the second position.

In addition, the image projection apparatus of the present invention
An image display element for displaying an original image;
A projection optical system that includes an anamorphic optical element rotatable about an optical axis, and projects the original image;
An input means for inputting a display mode;
An image projection apparatus having switching means for switching a relative position of the anamorphic optical element with respect to the image display element between a first position and a second position based on the input display mode;
When the display mode is a mode for displaying a plurality of images side by side, the relative position between the anamorphic optical element and the image display element is the first position, and the display mode displays only one image. In the mode, the control means has a relative position between the anamorphic optical element and the image display element as the second position, and the control means has the aspect ratio of the image information by the projection optical system. Is projected so as to display different image information in a plurality of areas of the display area of the image display element.

In addition, the image projection apparatus of the present invention
An image display element for displaying image information;
A projection optical system including a rotatable anamorphic optical element having an optical axis as a rotation axis, and having a function of projecting image information displayed on the image display element with different aspect ratios, and an image displayed on the image display element Signal processing means for controlling the display mode of information, input means for inputting a display mode of image information to be displayed on the image display element, and the anamorphic optical element based on the display mode information inputted from the input means An image projection apparatus comprising: control of a relative position of the image display element relative to the image display element; and control means for controlling a display mode of image information displayed on the image display element by the signal processing means. , Different image information is displayed in a plurality of display areas of the image display element based on a signal from the control means,
It is characterized by.

In addition, the image projection apparatus of the present invention
An image display element for displaying image information;
A projection optical system including a rotatable anamorphic optical element having an optical axis as a rotation axis, and having a function of projecting image information displayed on the image display element with different aspect ratios, and an image displayed on the image display element Signal processing means for controlling the display mode of information, input means for inputting a display mode of image information to be displayed on the image display element, and the anamorphic optical element based on the display mode information inputted from the input means An image projection apparatus having control of a relative position with respect to the image display element, and control means for controlling a display mode of image information displayed on the image display element by the signal processing means,
The control means controls the signal processing means to display different image information in a plurality of display areas of the image display element when the projection optical system projects image information with an aspect ratio of 2 or more. It is characterized by that.

According to the present invention,
The present invention can switch and project a projected image with various aspect ratios, and can simultaneously project a plurality of projected images with the same projection apparatus, and the entire apparatus having a function with a wider usage range can be obtained. A small image projection apparatus can be obtained.

  FIG. 1 is a main part block diagram of Embodiment 1 of the present invention.

  In FIG. 1, 1 is an image display element such as a liquid crystal. Reference numeral 2 denotes a projection optical system, which includes an anamorphic optical element (anamorphic group) 2a for projecting image information (original image) displayed on the image display means 1 onto the screen S with different aspect ratios.

  The anamorphic optical element 2a has different refracting power in the horizontal direction (perpendicular to the plane of the paper) and the vertical direction (in-plane direction of the plane), and changes the aspect ratio of the image information displayed on the image display element 1 on the screen S (that is, It is used to project (changing the projection mode).

  The anamorphic optical element 2a is provided so as to be rotatable about the optical axis 2b of the projection optical system 2 as a rotation axis. The aspect ratio (projection mode) of the projected image projected on the screen S is changed depending on the rotational position of the anamorphic optical element 2a.

  Reference numeral 3 denotes a driving means (switching means) that rotates the anamorphic optical element 2a to change its position relative to the image display element 1.

  That is, the driving unit 3 switches the relative position of the anamorphic optical element 2a with respect to the image display element 1 between the first position and the second position based on the input display mode.

  Reference numeral 4 denotes signal processing means, which processes image information sent from the image information generating means 6 based on a signal from the control means 5 (for example, image compression processing) and displays it on the image display element 1. Controls the display mode of image information.

  Here, the display mode includes the following. The first one is to project an image based on which image signal among the image signals input to the image projection apparatus (there may be one or more), that is, the image to be projected It is a combination. The second includes the aspect ratio (aspect ratio) of the entire image when the image is projected, or information instead of it. For example, the information may be vertical: horizontal = 3: 4 or vertical: horizontal = 9: 16.

  The image information generating unit 6 creates various types of image information to be displayed on the image display element 1 and inputs the image information to the signal processing unit 4 as, for example, input 1 and input 2 image information.

  Reference numeral 7 denotes input means for inputting image information displayed on the image display element 1 by the observer, that is, image information displayed on the screen 2.

  Reference numeral 5 denotes control means for controlling image information projected on the screen 2 by an input signal from the input means 7. For example, the arrangement form of the anamorphic optical element 2a is specified based on the input information from the input means 7, and the type of image information displayed on the image display element 1 by the signal processing means 4 is controlled.

  In addition, when the display mode is a mode in which a plurality of images are displayed side by side, the control unit 5 sets the relative position between the anamorphic optical element and the image display element as the first position and displays only one image in the display mode. In the display mode, the relative position between the anamorphic optical element and the image display element is set as the second position.

  FIGS. 2 to 5 are schematic views of the main part of the first embodiment of the projection optical system (projection lens) 2 used in the image projection apparatus of the present invention.

  The projection optical system 2 of Example 1 includes a lens group 2C composed of an axially symmetric lens having main power (refractive power), and two lenses having different powers in two orthogonal directions (horizontal direction and vertical direction). It has an anamorphic group 2a.

  FIG. 2 shows a vertical section (yz section) of the projection optical system of Embodiment 1 of the present invention, and FIG. 3 shows a horizontal section (xz section) of the projection optical system of Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes an image display element for displaying an image. The displayed image is enlarged and projected on a screen S by a projection optical system 2 including a lens group 2C and an anamorphic group 2a.

  2 and 3, .theta.x and .theta.y represent the angles of the projected light beams by only the lens group 2C in the horizontal and vertical directions, respectively. θx ′ and θy ′ represent the angles of light rays projected by the projection optical system 2 including the lens group 2C and the anamorphic group 2a in the horizontal and vertical directions, respectively. The difference between the angle θx and the angle θx ′ and the difference between the angle θy and the angle θy ′ represent an optical effect obtained by using the anamorphic group 2a.

  By using the anamorphic group 2a, the angle of the projection light beam in the vertical direction is compressed from the angle θy to the angle θy ′ in FIG. In FIG. 3, the angle of the projected light beam in the horizontal direction is enlarged from the angle θx to the angle θx ′.

  In the state shown in FIGS. 2 and 3, the projected image is an image that is horizontally long (the horizontal direction is longer) than the aspect ratio displayed on the image display element 1.

  4 and 5 are schematic views when the anamorphic group 2a shown in FIGS. 2 and 3 is rotated by 90 ° about the optical axis o. In FIG. 4, the angle θy in the vertical direction is enlarged to the angle θy ″. In FIG. 5, the angle θx in the horizontal direction is compressed to the angle θx ″.

  Here, in the anamorphic group 2a, the imaging magnification of the lens group 2C is multiplied by α in the vertical direction (vertical direction, y direction) which is one direction, and the horizontal direction (horizontal direction, x direction) which is the other direction orthogonal thereto is Has an optical action of 1 / α times. Here, the magnification α is 1.189.

  The image display element 1 used in Example 1 has an aspect ratio of 1.886: 1.

FIG. 7 shows an image of the projected image Pa when the image display element 1 is projected on the screen S by only the lens group 2C without using the anamorphic group 2a. In FIG. 7, the ratio of the vertical and horizontal dimensions Ay and Az of the projected image Pa is
Ax: Ay = 1.886: 1
It is.

  FIG. 8 is an explanatory diagram of the projection image Pa1 when the image display element 1 is projected on the screen by the projection optical system 2 using the anamorphic group.

  This corresponds to the projection optical system 2 in which the anamorphic group 2a is used as shown in FIGS.

The vertical and horizontal dimensions Ay ″ and Ax ″ of the projection image Pa1 on the screen S are
Horizontal direction Ax '' = 1.886 / 1.189 = 1.862
Longitudinal direction Ay '' = 1 * 1.189 = 1.189
It becomes. The image display element 1 is projected on the screen S at this ratio. Thereby, the aspect ratio of the projection image Pa1 is
Horizontal: Vertical = Ax ″: Ay ″ = 1.5862: 1.189 = 4: 3
It becomes.

  In FIG. 8, the dotted line represents the projection image Pa based on the aspect ratio of FIG.

  4 and 5, when the anamorphic group 2a is rotated 90 degrees about the optical axis O as the rotation axis, as shown in FIGS. 2 and 3, the anamorphic group 2a sets the imaging magnification of the lens group 2C in the vertical direction ( The y direction is multiplied by 1 / α, and the lateral direction (x direction) is multiplied by α.

FIG. 9 is an explanatory diagram of the projection image Pa2 at this time. In FIG. 9, the vertical and horizontal dimensions Ay ′ and Ax ′ of the projection image Pa2 are
Horizontal direction Ax '= 1.886 * 1.189 = 2.425
Longitudinal direction Ay ′ = 1 / 1.189 = 0.8410
It becomes. The image display element 1 is projected on the screen S at this ratio. As a result, the aspect ratio of the projected image Pa2 is
Horizontal: Vertical = Ax ′: Ay ′ = 2.2425: 0.8410 = 8: 3
It becomes. In FIG. 9, the dotted line represents the projection image Pa based on the aspect ratio of FIG.

The ratio ASR between the horizontal length LX and the vertical length LY at this time is
ASR = LX / LY = 2.67
It is.

In this example,
2 ≦ ASR
It is trying to become. The ASR is preferably less than 4.

  This makes it possible to efficiently project two different pieces of image information simultaneously.

  FIG. 6 is a schematic view when a part of FIG. 1 is extracted.

  FIG. 6 is an explanatory diagram of a method for controlling an image displayed on the image display element 1 in the first embodiment. In FIG. 6, the control means 5 selects the video input (INPUT 1, INPUT 2) input to the signal processing means 4 based on the signal from the input means 7, and sends a signal to the driver circuit 8 that drives the image display element 1. (For example, INPUT1). The driver circuit 8 displays an image on the image display element 1 based on the selected signal (for example, INPUT1).

  Now, the image information Input 1 or the image information Input 2 having an aspect ratio of 1.886: 1 is projected on the screen at an aspect ratio of 4: 3 by the input means 7. Assume that signal A or signal B is input. At this time, the control means 5 drives and controls the drive means 3 so that the anamorphic group 2a is projected as the projection image Pa is compressed in the horizontal direction (state shown in FIGS. 4 and 5). The driving means 3 drives the anamorphic group 2a based on a signal from the control means 5 so as to be in the state shown in FIGS.

  On the other hand, the signal processing means 4 processes image information (Input 1 or Input 2) having an aspect ratio of 1.886: 1 displayed on the image display element 1 based on a signal from the control means 5, and sends image information processing to the driver 8. Input the signal. The driver 8 displays image information on the image display element 1 based on the signal from the signal processing means 4.

  As a result, the image information displayed on the image display element 1 having an aspect ratio of 1.886: 1 is projected onto the screen S by the projection optical system 2 as an image having an aspect ratio of 4: 3.

  Next, it is assumed that a signal C for projecting image information Input1 to the left half on the screen S and simultaneously projecting image information Input2 completely different from the image information Input1 to the right half is input by the input means 7.

  At this time, the control means 5 drives and controls the drive means 3 so that the anamorphic group 2a is projected in a state in which the projection image Pa is expanded in the horizontal direction (state shown in FIGS. 2 and 3).

  The driving means 3 drives the anamorphic group 2a based on the signal from the control means 5 so as to be in the state shown in FIGS.

When the signal C is input from the input means 7, the control means 5 sets the image display surface (horizontal: vertical = 1.886: 1 image display surface) of the image display element 1 in the horizontal direction. Divide into areas. At this time, the aspect ratio of the image display surface of one image display element 1 is
Horizontal: Vertical = 0.943: 1
It becomes.

  For example, the signal processing unit 4 compresses the image information Input1 having an aspect ratio of 4: 3 so that the image information Input1 is half that of the image display element 1 (an aspect ratio of 1.886 / 2: 1 = 0.944: 1). And displayed on the left half of the effective surface of the image display element 1 (area PaL in FIG. 7).

Similarly, other image information Input2 having an aspect ratio of 4: 3 is compressed to 0.943: 1 and displayed on the right half of the effective surface of the image display element 1 (region PaR in FIG. 7). Then, the areas PaL and PaR are horizontally aligned by the projection optical system 2.
0.943 × 1.189 = 1.121
Vertically,
1 x (1 / 1.189) = 0.841
It becomes. As a result, the aspect ratio of the image information projected on the screen S is
1.121: 0.841 = 4: 3
It becomes.

  As described above, the signal processing unit 4 combines two video signals (for example, INPUT1 and INPUT2) into one video signal, and then transmits the synthesized video signal to the driver circuit 8.

  As a result, the image information R based on the first input signal Input1 is displayed on the left half, and the second input signal is simultaneously displayed on the right half on the image display element 1.

And one projection image Pa3 projected on the screen is
Horizontal length AX ′ = 1.121 × 2 = 2.242
Length in the vertical direction AY ′ = 0.841 = 0.841
2.242: 0.841 = 8: 3
Thereby, the image projection apparatus can display (project) 4: 3 images side by side on two screens.

  Here, if the number of pixels of the image display element 1 is 2048 × 1536, it is possible to display a high-definition image with a resolution of QXGA and a dual-screen display with a resolution of 4: 3 at a resolution of 4: 3 when displaying one screen at 4: 3. . When displaying two screens of XGA, the number of pixels in the vertical direction is doubled, so two lines may be controlled as one line.

  In the present embodiment, an image may be displayed as follows. The signal processing means 4 determines what kind of image signal is input from the image information generating means 6 and inputs a signal to that effect to the control signal 5. As the control signal 5, a signal from the signal processing unit 4 is input to the driving unit 3. The driving unit 3 switches the position of the anamorphic optical element 2 a based on a signal from the control unit 5. Thereby, for example, a plurality of images may be automatically displayed.

  The display mode is controlled by the signal processing means 4 based on a signal inputted from the input means 7 or the image information generating means 6 for inputting image information to be displayed on the image element means 1 by the observer.

  The second embodiment has the same configuration as the projection optical system of the first embodiment. In the second embodiment, the number of pixels in the image display element 1 is 1400 × 1050. As a result, when one screen with an aspect ratio of 4: 3 is displayed, a high-definition image of SXGA + and two screens of 700 × 1050 with 4: 3 can be displayed. When an image with an aspect ratio of 4: 3 is displayed on two screens, an XGA image can be displayed on two screens by compressing 1024 data in the horizontal direction and expanding the data in the vertical direction.

  The configuration of the projection optical system of Example 3 is basically the same as that of Example 1.

  The projection optical system 2 of Example 3 includes a lens group 2C composed of an axially symmetric lens having main power and an anamorphic group 2a composed of a plurality of lenses having different powers in two orthogonal directions.

  Here, the anamorphic group 2a has an optical action of multiplying the imaging magnification of the lens group 2C by β in the vertical direction and 1 / β in the horizontal direction. Here, the magnification β is 1.089.

  In Example 3, the aspect ratio of the image display element 1 is 2.249: 1 as shown in FIG.

FIG. 10 shows an image of the projected image Pa when the image display element 1 is projected on the screen by only the lens group L without using the anamorphic group 2a. In FIG. 10, the ratio of the vertical and horizontal dimensions By and Bx of the projected image Pa is
Bx: By = 2.249: 1
It is.

  FIG. 11 is an explanatory diagram of a projection image Pb1 when the image display element 1 is projected onto the screen S by the projection optical system 2 using the anamorphic group 2a. This corresponds to the case where the anamorphic group 2a is used so as to be compressed in the horizontal direction as shown in FIGS.

The vertical and horizontal dimensions By ″ and Bx ″ of the projected image Pb1 on the screen S are
Lateral direction Bx '' = 2.249 / 1.089 = 2.652
Longitudinal direction By '' = 1 * 1.089 = 1.089
It becomes. The image display element is projected on the screen S at this ratio. As a result, the aspect ratio of the projected image is
Horizontal: Vertical = Bx ″: By ″ = 2.0652: 1.089 = 17.007: 9
Thus, the aspect ratio of the projection image Pb1 is 17.07: 9. The dotted line in the figure represents the projected image Pa based on the aspect ratio of FIG.

  4 and 5, the anamorphic group 2a is rotated 90 degrees about the optical axis O as the rotation axis, and as shown in FIGS. 2 and 3, the anamorphic group 2a has the image forming magnification of the lens group 2c in the vertical direction. Multiply 1 / β and β in the horizontal direction.

  FIG. 12 is an explanatory diagram of the projection image Pb2 at this time.

In FIG. 12, the aspect ratios By ′ and Bx ′ of the projection image Pb2 are
Horizontal direction Bx ′ = 2.249 * 1.089 = 2.491
Longitudinal direction By ′ = 1 / 1.089 = 0.9183
It becomes. The image display element 1 is projected on the screen S at this ratio. As a result, the aspect ratio of the projected image Pb2 is
Horizontal: Vertical = Bx ′: By ′ = 2.491: 0.9183 = 8: 3
Thus, the projection image Pb2 is 8: 3. The dotted line in the figure represents the projected image Pa based on the aspect ratio of FIG.

  At this time, the signal processing means 4 for controlling the image displayed on the image display element 1 displays the first input signal Input1 on the left half of the image display element based on the signal from the control means 5, and the second input signal. Control is performed so that Input 2 is simultaneously compressed and displayed on the right half of the image display element 1. Thereby, the image projection apparatus can display a 4: 3 image on the screen S in two screens.

  Here, the number of pixels of the image display element 1 is 2048 × 1080. Then, when displaying one screen with an aspect ratio of 17.07: 9, if left and right 64 pixels (128 pixels in total) are not displayed, HD high-definition images and 4: 3 XGA two screens can be displayed. Become.

  When displaying two screens of XGA, the number of pixels in the vertical direction is excessive, and therefore, control may be performed so that data is interpolated and displayed.

  As described above, when the aspect ratio of the image display element 1 is set to be longer than 4: 3, it is possible to project two screens even when the anamorphic magnification is small.

  Here, the anamorphic group 2a may be configured to have a refractive lens formed of a free-form surface having no axis of symmetry, or may be configured to have a diffractive element.

1 is a block diagram of the main part of Embodiment 1 of the present invention. Vertical sectional view of the projection optical system of FIG. Horizontal sectional view of the projection optical system of FIG. Vertical sectional view of the projection optical system of FIG. Horizontal sectional view of the projection optical system of FIG. 1 is an enlarged explanatory view of a part of FIG. Explanatory drawing of the image display element of FIG. Explanatory drawing of the image display element of FIG. 1 and a projection image Explanatory drawing of the image display element of FIG. 1 and a projection image Explanatory drawing of the image display element which concerns on Example 3 of this invention. Explanatory drawing of the image display element and projection image which concern on Example 3 of this invention. Explanatory drawing of the image display element and projection image which concern on Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display element 2 Projection optical system 2a Anamorphic group 2b Optical axis 2c Lens part 3 Drive means 4 Signal processing means 5 Control means 6 Image information generation means 7 Input means 8 Driver S Screen

Claims (6)

An image display element for displaying an original image;
A projection optical system that includes an anamorphic optical element rotatable about an optical axis, and projects the original image;
An input means for inputting a display mode;
An image projection apparatus having switching means for switching a relative position of the anamorphic optical element with respect to the image display element between a first position and a second position based on the input display mode;
When the display mode is a mode for displaying a plurality of images side by side, the relative position between the anamorphic optical element and the image display element is the first position, and the display mode displays only one image. In the mode, the image projection apparatus further comprises a control unit that sets a relative position between the anamorphic optical element and the image display element as the second position. The projection optical system, when the ratio of the length of one direction of the projected image and the length of the other direction orthogonal to the one direction is ASR,
2 ≦ ASR
The image projection apparatus according to claim 1, wherein the image projection apparatus has a projection mode for projecting under the following conditions. An image display element for displaying an original image;
A projection optical system that includes an anamorphic optical element rotatable about an optical axis, and projects the original image;
An input means for inputting a display mode;
An image projection apparatus having switching means for switching a relative position of the anamorphic optical element with respect to the image display element between a first position and a second position based on the input display mode;
When the display mode is a mode for displaying a plurality of images side by side, the relative position between the anamorphic optical element and the image display element is the first position, and the display mode displays only one image. In the mode, the control means has a relative position between the anamorphic optical element and the image display element as the second position, and the control means has the aspect ratio of the image information by the projection optical system. Is projected so that the signal processing means displays different image information in a plurality of display areas of the image display element. An image display element for displaying image information;
A projection optical system including a rotatable anamorphic optical element having an optical axis as a rotation axis, and having a function of projecting image information displayed on the image display element with different aspect ratios, and an image displayed on the image display element Signal processing means for controlling the display mode of information, input means for inputting a display mode of image information to be displayed on the image display element, and the anamorphic optical element based on the display mode information inputted from the input means An image projection apparatus comprising: control of a relative position of the image display element relative to the image display element; and control means for controlling a display mode of image information displayed on the image display element by the signal processing means. , Different image information is displayed in a plurality of display areas of the image display element based on a signal from the control means,
An image projection apparatus characterized by the above. The projection optical system, when the ratio of the length of one direction of the projected image and the length of the other direction orthogonal to the one direction is ASR,
2 ≦ ASR
The image projection apparatus according to claim 4, wherein the image projection apparatus has a projection mode for projecting under the following conditions. An image display element for displaying image information;
A projection optical system including a rotatable anamorphic optical element having an optical axis as a rotation axis, and having a function of projecting image information displayed on the image display element with different aspect ratios, and an image displayed on the image display element Signal processing means for controlling the display mode of information, input means for inputting a display mode of image information to be displayed on the image display element, and the anamorphic optical element based on the display mode information inputted from the input means An image projection apparatus having control of a relative position with respect to the image display element, and control means for controlling a display mode of image information displayed on the image display element by the signal processing means,
The control means controls the signal processing means to display different image information in a plurality of display areas of the image display element when the projection optical system projects image information with an aspect ratio of 2 or more. An image projection apparatus characterized by that.

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