JP2020191586A - Projection device - Google Patents

Abstract

To provide a technology that can reduce misregistration in an easy and suitable manner.SOLUTION: A projection device of the present invention comprises: a plurality of display panels; projection means that projects, on a projection surface, a plurality of images displayed respectively on the plurality of display panels; display control means that displays a plurality of adjustment points respectively on the plurality of display panels; changing means that changes the positions of the adjustment points displayed on any one of the plurality of display panels according to an instruction from a user; deformation means that deforms an image displayed on the display panel on which the positions of the adjustment points are changed by the changing means, based on the arrangement of the plurality of adjustment points after the change displayed on the display panel; and control means that, based on the distribution of conspicuousness of the shift between the plurality of images on the projection surface, controls at least one of the arrangement of the plurality of adjustment points before the change performed by the changing means and the distribution of the accuracies in changing of the positions of the adjustment points performed by the changing means.SELECTED DRAWING: Figure 6

Description

The present invention relates to a projection device.

In a projector having three display panels corresponding to three color components (for example, a red component, a green component, and a blue component), the three images corresponding to the three color components are displaced on the projection surface. There is. Such deviations are called "registration deviations" and are caused by sticking deviations of the display panel and chromatic aberration of magnification which is an optical characteristic of the display panel.

As a method for reducing the registration deviation, there is a first method of changing the timing (capture position) of capturing an image to be displayed on the display panel and changing the display position of the image on the display panel in units of one pixel. There is also a second method of reducing the registration deviation of one pixel or less by deforming the image (image processing). In the first method, the capture position of the image displayed on the display panel is changed to shift the image to the top, bottom, left, or right. In the first method, since the image is shifted in units of one pixel, the image quality of the image is not deteriorated, but the registration deviation of one pixel or less cannot be reduced. In the second method, in addition to shifting the entire image, correction in the rotation direction and correction of chromatic aberration of magnification are performed. In the second method, since the brightness of the deformed pixel is determined by the luminance distribution that distributes the brightness of the pixel before the deformation to a plurality of positions (a plurality of pixels after the deformation), the deformation of one pixel or less is performed. It is possible to reduce the registration deviation of one pixel or less. By using these methods in combination, the registration deviation can be almost eliminated.

In the second method, a plurality of adjustment points (adjustment points) are generally set, and the region of the deformed image is determined by using linear interpolation between the adjustment points. Patent Document 1 discloses that an image is divided into a plurality of quadrilateral regions, and the image is deformed by moving the vertices (adjustment points) of the quadrilateral regions.

Japanese Unexamined Patent Publication No. 2013-78001

However, in the prior art such as the technique disclosed in Patent Document 1, in the initial state, the plurality of intervals of the plurality of adjustment points on the display panel are uniform and fixed. Therefore, when the number of adjustment points is small, the registration deviation cannot be sufficiently reduced, and when there are many adjustment points, it takes time and effort to sufficiently reduce the registration deviation.

An object of the present invention is to provide a technique capable of easily and preferably reducing registration deviation.

A first aspect of the present invention is a plurality of display panels, a projection means for projecting a plurality of images displayed on the plurality of display panels, and a plurality of adjustment points on the plurality of display panels, respectively. A display control means to be displayed, a changing means for changing the position of the adjustment point displayed on any of the plurality of display panels according to an instruction from the user, and a display panel whose adjustment point position is changed by the changing means. Deformation means for deforming the image displayed on the display panel based on the arrangement of the plurality of modified adjustment points displayed on the display panel, and the distribution of the conspicuous deviation of the plurality of images on the projection surface. Based on the above, it is characterized by having a control means for controlling at least one of the arrangement of a plurality of adjustment points before the change by the change means and the distribution of the change accuracy of the position of the adjustment points by the change means. It is a projection device.

A second aspect of the present invention is a method for controlling a projection device having a plurality of display panels, which comprises a projection step of projecting a plurality of images displayed on the plurality of display panels onto a projection surface, and a plurality of adjustments. A display control step for displaying points on the plurality of display panels, a change step for changing the position of an adjustment point displayed on any of the plurality of display panels according to an instruction from a user, and an adjustment step according to the change step. A deformation step of deforming an image displayed on a display panel in which the position of a point has been changed based on the arrangement of a plurality of changed adjustment points displayed on the display panel, and the plurality of said on the projection surface. A control step that controls at least one of the arrangement of a plurality of adjustment points before the change by the change step and the distribution of the change accuracy of the position of the adjustment points by the change step based on the distribution of the conspicuousness of the image shift. It is a control method characterized by having and.

A third aspect of the present invention is a program for making a computer function as each means of the projection device described above.

According to the present invention, the registration deviation can be easily and preferably reduced.

It is a block diagram which shows the structural example of the projection apparatus. It is a figure which shows an example of a projected image. It is a figure which shows an example of a pattern image. It is a figure which shows an example of the image displayed on the display panel. It is a figure which shows an example of the transformation method of an image. It is a flowchart of registration deviation adjustment processing. It is a figure which shows an example of a menu image. It is a flowchart of the adjustment point setting program which concerns on Embodiment 1. It is a figure which shows an example of the area of a projected image and a pattern image. It is a flowchart of the adjustment point setting program which concerns on Embodiment 2. It is a figure which shows an example of the detection result of the position on the projection plane. It is a figure which shows an example of the area of a projected image and a pattern image.

<Embodiment 1>
Hereinafter, Embodiment 1 of the present invention will be described. The projection device (projector) according to the first embodiment has a plurality of display panels, and projects a plurality of images displayed on the plurality of display panels onto a projection surface. In the first embodiment, the plurality of display panels have a plurality of display panels having different color components so that a plurality of images are superimposed on the projection surface to display a color image (an image capable of expressing a plurality of colors) on the projection surface. The image shall be displayed. Specifically, it is assumed that the projection device has a display panel corresponding to the red component, a display panel corresponding to the green component, and a display panel corresponding to the blue component. The plurality of images displayed on the plurality of display panels are not limited to the plurality of images having different color components. For example, the plurality of display panels may display a plurality of images having different dynamic ranges from each other, so that a plurality of images are superposed on the projection surface and an image having a wider dynamic range is displayed on the projection surface. In this case, each of the plurality of display panels may or may not display a color image. The number of display panels may be greater than or less than three.

In such a projection device, a plurality of images displayed on the plurality of display panels may be displaced on the projection surface. Such a deviation is called a "registration deviation" or the like. 2 (A) to 2 (C) show a state in which an image of a red component, an image of a green component, and an image of a blue component are projected on a projection surface. In FIG. 2A, the image of the red component, the image of the green component, and the image of the blue component are projected without deviation, and a suitable color image is displayed on the projection surface. In FIG. 2B, a registration shift has occurred, and a blurred color image having a low resolution is displayed on the projection surface. The registration deviation can be reduced by shifting the display position of the image on the display panel (changing the timing of capturing the image displayed on the display panel) or deforming the image displayed on the display panel (image processing). In FIG. 2C, the registration deviation in FIG. 2B is reduced, and a color image sharper than that in FIG. 2B is displayed on the projection surface. Since the image of each color component is blurred by the luminance distribution that distributes the brightness of the pixels before deformation to a plurality of positions (plurality of pixels after deformation), in FIG. 2C, the color image displayed on the projection surface is shown. The image quality is lower than that in FIG. 2 (A).

When reducing (adjusting) the registration deviation, generally, a pattern image including a plurality of adjustment points (a plurality of grid points) is displayed on a plurality of display panels. For example, the pattern image 303 shown in FIG. 3A is displayed on the display panel. In FIG. 3 (A), attention is paid to only one display panel for the sake of simplicity. The pattern image 303 includes a total of 24 adjustment points 304 of 6 points in the horizontal direction and 4 points in the vertical direction. The user can instruct the position of each adjustment point 304 to be changed (moved) individually. When the upper left adjustment point 304 moves in the direction of the arrow (lower right) according to the instruction from the user, the pattern image 303 is updated to the pattern image 302, and the image displayed on the display panel is the changed plurality of adjustment points 304. Will be transformed based on the arrangement of. The pattern image 301 is a reference (target) pattern image, and the registration deviation can be reduced by moving the adjustment point 304 of the pattern image 303 so that a pattern image matching the pattern image 301 can be obtained. Although the adjustment points of the pattern images 301 and 302 are omitted in FIG. 3A, at least the adjustment points of the pattern image 302 are displayed.

Since the pattern image of one of the red component, the green component, and the blue component may be used as the reference pattern image 301, it is necessary to adjust the pattern image (adjustment point) for the remaining two colors. It becomes an ingredient. Therefore, the maximum number of adjustment points that the user moves is 48 points. The user is instructed to select a color component to be adjusted, an instruction to select one of 24 adjustment points included in the pattern image of the selected color component, and an instruction to move the selected adjustment point. I do.

The number of adjustment points included in one pattern image may be more or less than 24 points. The number of adjustment points included in one pattern image may be a fixed number predetermined by the manufacturer or the like, or may be changed manually or automatically. As shown in FIG. 3B, when there are many adjustment points 304, it is possible to reduce the registration deviation with high accuracy, but it takes time and effort for the user. As shown in FIG. 3A, when the number of adjustment points 304 is small, the registration deviation cannot be reduced with high accuracy, but the user's labor is reduced.

Conventionally, when the projected image (the image displayed on the projection surface) has a region where the registration deviation is easily noticeable (easily visible), it is shown in FIG. 3B in response to an instruction from the user. As described above, the number of adjustment points 304 is increased for the entire area of the projected image. At this time, since the number of adjustment points 304 is increased even in a region where the registration deviation is inconspicuous, the user's labor is unnecessarily increased.

FIG. 1A is a block diagram showing a configuration example of the projection device 10 (display device) according to the first embodiment.

The image input unit 101 is an input interface for inputting image data to be projected from an external device to the projection device 10. The image input unit 101 includes interfaces such as a composite, a component, DVI-D, and HDMI (registered trademark). The image input unit 101 outputs the image data acquired from the external device to the image processing unit 103, and outputs the synchronization signal superimposed on the image data to the display panel drive unit 104.

The control unit 102 controls each component of the projection device 10, and has a CPU (Central Processing Unit) and a memory. The control unit 102 controls each component of the projection device 10 according to an instruction input from the communication unit 105 or the instruction input unit 106.

The image processing unit 103 performs various image processing. For example, the image data input from the image input unit 101 is subjected to resolution conversion, color correction, deformation processing, and the like. The color correction is a process for obtaining a plurality of images to be displayed on a plurality of display panels included in the display unit 107. In the first embodiment, an image having a red component, an image having a green component, and an image having a blue component are displayed. It is a process for obtaining. As the deformation process, a first deformation process (deformation process based on the arrangement of a plurality of adjustment points) for reducing registration deviation and a second deformation process such as keystone correction and curved surface correction are performed. The image processing unit 103 also performs a process of generating an OSD (On Screen Display) image such as a menu image or a pattern image. The image processing unit 103 outputs the image data after image processing to the display unit 107.

The display panel drive unit 104 generates a drive signal (drive pulse signal) for driving a plurality of display panels included in the display unit 107, and outputs the drive signal to the display unit 107. For example, the display panel drive unit 104 individually generates drive signals for each display panel based on the synchronization signal input from the image input unit 101. The synchronization signal includes a horizontal synchronization signal Hsync and a vertical synchronization signal Vsync. The display panel drive unit 104 uses the horizontal synchronization signal Hsync and the vertical synchronization signal Vsync as reference signals, and sets the timing (capture position) of image data to the display panel by one clock or one horizontal line according to the instruction from the control unit 102. Change in units. The control unit 102 gives an instruction so that the image data acquisition position of each color component is individually changed. As a result, the display position of the image of each color component on the display unit 107 can be shifted up, down, left, or right in units of one pixel.

An example of changing the capture position and the result will be described. 4 (A) and 4 (B) show an image (an image of a certain color component) displayed on the display panel. FIG. 4A shows a state before the capture position is changed, and FIG. 4B shows a state after the capture position is changed. The images of FIGS. 4 (A) and 4 (B) include black (gradation value = 0) pixel 401 and brighter than black (gradation value> 0) pixel 402. When the user gives an instruction to shift the image by one pixel to the left from the state of FIG. 4 (A) in order to reduce the registration deviation in the display panel drive unit 104, the display panel drive unit 104 displays FIG. 4 (A). ) Is taken in one clock earlier. As a result, as shown in FIG. 4 (B), the state of the display panel is a state in which the image is shifted to the left by one pixel from the state of FIG. 4 (A).

The communication unit 105 communicates with an external device such as a printing device, another display device, and a distributor. The communication with the external device may be wired communication or wireless communication.

The instruction input unit 106 receives an instruction (operation) from the user to the projection device 10 and notifies the control unit 102 of the instruction from the user. The user may instruct to select one of a plurality of operation modes including a normal projection mode in which an image from an external device is input and projected, and a registration deviation adjustment mode for reducing (adjusting) the registration deviation. it can. Further, in the registration deviation adjustment mode, the user can also give an instruction to select a color component, an adjustment point, etc., an instruction to move the adjustment point, an instruction to shift the image up, down, left, or right. it can. The instruction input unit 106 includes, for example, a switch, a dial, a touch panel, a mouse, and the like. The instruction input unit 106 may be a receiving unit (infrared receiving unit or the like) that receives an instruction from the remote controller and transmits the received instruction to the control unit 102.

The display unit 107 has a plurality of display panels (a display panel corresponding to the red component, a display panel corresponding to the green component, and a display panel corresponding to the blue component). The light source 108 irradiates each display panel of the display unit 107 with light. Each display panel of the display unit 107 modulates the light from the light source 108 to display an image of the corresponding color component (an image input from the image processing unit 103). In the first embodiment, the display panel is a transmissive display panel that transmits light from the light source 108 to display an image, such as a transmissive liquid crystal panel or a DMD (Digital Micromirror Device). The display panel may be a reflective display panel (for example, an LCOS (reflective liquid crystal) panel) that reflects light from the light source 108 to display an image.

The illumination optical system 109 parallelizes the light emitted from the light source 108 and outputs it as a luminous flux toward each display panel of the display unit 107. That is, the light from the light source 108 is not directly irradiated to each display panel of the display unit 107, but is irradiated to each display panel of the display unit 107 via the illumination optical system 109.

The projection optical system 110 projects a plurality of images displayed on the plurality of display panels of the display unit 107 onto a projection surface (screen). Specifically, the projection optical system 110 projects light (optical image) emitted from the light source 108 and transmitted through each display panel onto the projection surface. The projection optical system 110 can be physically shifted in the horizontal / vertical direction according to an instruction from the control unit 102. When the projection optical system 110 shifts, the optical axis of the projection optical system 110 moves, and the projected image (the image displayed on the projection surface) moves in the horizontal / vertical direction on the projection surface while maintaining its shape. .. This function is called "lens shift" or the like. Information indicating the physical position and the optical axis position of the projection optical system 110 is stored in a rewritable memory in the control unit 102.

The first memory 111 stores a program used by the control unit 102, data referred to when the program is executed, and the like. Further, the first memory 111 stores color components, coordinates of adjustment points, movement amounts of adjustment points, and the like as registration deviation adjustment parameters (parameters for reducing (adjusting) registration deviation). The control unit 102 can execute a plurality of programs stored in the first memory 111. The adjustment point setting program and the deformation coordinate calculation program are stored in the first memory 111. The adjustment point setting program is a program for setting the arrangement of a plurality of adjustment points in the initial state (before movement) and the distribution of the change accuracy of the position of the adjustment points. The deformed coordinate calculation program is a program that calculates a deformed coordinate table.

The second memory 112 stores intermediate data when the control unit 102 executes a program in the first memory 111. For example, the second memory 112 stores a projective transformation matrix used for keystone correction, a deformation coordinate table calculated by the deformation coordinate calculation program, and the like.

The sensor 113 detects a plurality of positions on the projection surface (a plurality of relative positions with respect to the projection device 10; distances from the projection device 10 to a plurality of positions on the projection surface). Using the detection result of the sensor 113, autofocus, automatic keystone correction, and the like can be performed.

FIG. 1B is a block diagram showing a configuration example of the image processing unit 103. The image processing unit 103 includes a resolution conversion unit 201, a color correction unit 202, a deformation processing unit 203, a frame memory 204, and an OSD generation unit 205.

The resolution conversion unit 201 converts the resolution of the image input from the external device via the image input unit 101 into a predetermined resolution. Then, the resolution conversion unit 201 outputs the converted image to the color correction unit 202. In the first embodiment, the resolution conversion unit 201 adjusts the resolution of the input image to the resolution of the display unit 107 (each display panel). Here, consider a case where the resolution of the display unit 107 is 1920 pixels in the horizontal direction × 1080 pixels in the vertical direction, and the resolution of the input image is 1280 pixels × 720 pixels. In this case, the resolution conversion unit 201 enlarges the input image by 1.5 times in each of the horizontal direction and the vertical direction by interpolation processing, and converts the input image into an image of 1920 pixels × 1080 pixels. When the aspect ratio is the same between the resolution of the display unit 107 and the resolution of the input image, the simple enlargement or reduction as described above may be performed. As in the case where the resolution of the input image is 1024 pixels × 768 pixels, the aspect ratio may differ between the resolution of the display unit 107 and the resolution of the input image. In that case, the resolution of the input image is converted so that the aspect ratio of the input image is maintained, and the converted image is displayed in the center of the display unit 107. May be placed. By doing so, blank areas are generated above and below or to the left and right of the display unit 107. The resolution conversion unit 201 adds a black or background color image to the converted image so that the black or set background color is displayed in the blank area (the pixels corresponding to the blank area are black or Replaced by background color pixels). The input image may be enlarged in the horizontal direction and the vertical direction at different magnifications and converted into an image of 1920 pixels × 1080 pixels (resolution of the display unit 107). The resolution of the display unit 107 and the resolution of the input image are not particularly limited.

The color correction unit 202 performs color correction such as color matrix conversion, chroma processing, gamma processing, and color space conversion on the image input from the resolution conversion unit 201, and performs a red component image, a green component image, and a color correction unit 202. , Obtain an image of the blue component. The color correction unit 202 outputs the image of the red component, the image of the green component, and the image of the blue component to the deformation processing unit 203.

The transformation processing unit 203 individually performs transformation processing on the image of the red component, the image of the green component, and the image of the blue component input from the color correction unit 202. Specifically, the transformation processing unit 203 transforms the image according to the instruction from the control unit 102 and writes it to the frame memory 204. When the writing is completed, the transformation processing unit 203 reads the transformed image from the frame memory 204 and outputs it to the display unit 107. The transformation processing unit 203 individually performs these processes on the image of the red component, the image of the green component, and the image of the blue component. Due to the transformation process, the size of the image after the transformation becomes smaller than the size of the image before the transformation, and a blank area may be generated in the display unit 107. In that case, the transformation processing unit 203 adds a black or background color image to the converted image so that the black or set background color is displayed in the blank area (corresponding to the blank area). Pixels are replaced with black or background color pixels).

As described above, the image processing unit 103 (deformation processing unit 203) includes a first deformation process (deformation process based on the arrangement of a plurality of adjustment points) and a keystone correction as the deformation process. And a second deformation process such as curved surface correction. Hereinafter, the first deformation process will be described. In the second transformation process, the image is deformed in the same manner as in the first transformation process.

FIG. 5A shows a region of the image before deformation, and FIG. 5B shows a region of the image after deformation. When the adjustment point P1 (lattice point) is moved as shown in FIGS. 5 (A) and 5 (B), the coordinates S (coordinates in which the pixels exist before deformation) in FIG. 5 (A) are shown in FIG. It becomes the coordinate D of B). The point P1'is an intersection of a straight line passing through the adjustment point P1 and the coordinates S (or coordinates D) and a straight line passing through the adjustment point P2 and the adjustment point P4. In the area surrounded by the adjustment points P1, P2, P3, P4, the coordinates after the deformation corresponding to the coordinates before the deformation are calculated by interpolation processing (linear interpolation, etc.) using the adjustment points P1, P2, P3, P4. it can. For example, the coordinate S divides the line segment P1-P1'by α: 1-α, and the point P1'divides the line segment P2-P4 into β: 1-β. The coordinate D can be calculated so that the coordinate D divides the line segment P1-P1'by α: 1-α and the point P1'divides the line segment P2-P4 into β: 1-β. At this time, if the coordinate D is an integer (if the transformed pixel can be generated in the coordinate D), the pixel value of the coordinate S in the image before the transformation is determined as the pixel value of the coordinate D in the image after the transformation. it can. However, the coordinates calculated by the interpolation process are not always integers. When the coordinate D is not an integer (when the deformed pixel cannot be generated in the coordinate D), the pixel value of the coordinate S in the image before the deformation is used as the coordinates around the coordinate D (coordinates capable of generating the deformed pixel). ), And the pixel value after deformation is determined. Bilinear, bicubic, or any other interpolation method can be used to determine the pixel value after deformation.

As shown in FIGS. 5 (A) and 5 (B), the transformation processing unit 203 can transform at least a part of the image. Further, the deformation processing unit 203 can shift the entire image by adding the same offset value to all the adjustment points (moving all the adjustment points with the same movement amount and movement direction).

When the image is shifted to the left by less than one pixel from the state of FIG. 4A by the method described above, the state of the display panel becomes the state shown in FIG. 4C. Pixel value distribution (luminance distribution) is performed so that the sum of the pixel value of the pixel 403 and the pixel value of the pixel 404 in FIG. 4C is the pixel value of the pixel 402. In FIG. 4C, the luminance center of gravity (the centroid of the luminance of the pixel 403 and the luminance of the pixel 404) is closer to the pixel 404 side. When the shift amount includes an integer part and a minority part, the display panel drive unit 104 performs a shift corresponding to the integer part under the control of the control unit 102, and the transformation processing unit 203 performs a shift corresponding to the decimal part. You may go.

The control unit 102 executes a deformation coordinate calculation program and generates a deformation coordinate table (correspondence between the coordinates before deformation and the coordinates after deformation) for reducing the registration deviation. After that, the control unit 102 outputs the generated deformation coordinate table to the deformation processing unit 203, and causes the deformation processing unit 203 to perform the first deformation processing. In the registration deviation adjustment mode, the positions of a plurality of adjustment points are individually changed according to an instruction from the user. When the position of the adjustment point is changed, the deformation coordinate table is updated. The deformation coordinate table for reducing the registration deviation is generated individually for a plurality of color components.

For the second deformation process (trapezoidal correction or curved surface correction), the control unit 102 generates a common deformation coordinate table for a plurality of color components. After that, the control unit 102 outputs the generated deformation coordinate table to the deformation processing unit 203, and causes the deformation processing unit 203 to perform the second deformation processing. Regarding the keystone correction, the control unit 102 calculates the projection transformation matrix based on the horizontal / vertical projection angle of the keystone correction and stores it in the second memory 112. Then, the control unit 102 generates a deformation coordinate table by using the projective transformation matrix stored in the second memory 112. The projective transformation matrix is a matrix that transforms the four-corner coordinates before deformation into the four-corner coordinates after deformation obtained from the horizontal and vertical projection angles, and can be calculated by a general matrix calculation method. The horizontal projection angle (H) and the vertical projection angle (V) are set using a menu image as shown in FIG. 7 (A).

The OSD generation unit 205 generates OSD images such as various menu images under the control of the control unit 102, and outputs the generated OSD images to the transformation processing unit 203. The transformation processing unit 203 appropriately synthesizes the OSD images, and outputs an image in which at least the OSD images are arranged. As a result, the OSD image is projected onto the projection surface and displayed (OSD image display control). In the first embodiment, in the registration deviation adjustment mode, the OSD generation unit 205 generates a pattern image for reducing the registration deviation. Then, the pattern image is displayed on the projection surface without displaying the image from the external device.

FIG. 6 is a flowchart of the registration deviation adjustment process performed by the projection device 10. FIG. 7B shows a menu image generated by the OSD generation unit 205 in the registration deviation adjustment mode. The menu image of FIG. 7B includes "adjustment color", "shift adjustment", and "detailed adjustment" as selection items. When the user selects "detailed adjustment" using the instruction input unit 106, the registration deviation adjustment process of FIG. 6 starts. In the first embodiment, it is assumed that the keystone correction for the oblique projection is performed before the registration deviation adjustment process. The keystone correction here is not an optical correction but an image processing. Specifically, it is an image process in which the plurality of images are reduced and deformed so that the shapes of the plurality of images displayed on the plurality of display panels approach a predetermined shape. The predetermined shape is, for example, a shape that becomes rectangular on the projection surface.

The user can change the color component to be adjusted by designating the "adjustment color" shown in FIG. 7B. Further, the user can also specify "shift adjustment" to shift the entire pattern image of the color component to be adjusted in the horizontal direction or the vertical direction. At that time, the user can specify the shift amount.

The registration deviation adjustment process of FIG. 6 will be described.

In S601, the control unit 102 executes the adjustment point setting program, arranges a plurality of adjustment points in the initial state (before movement), and changes the position of the adjustment points (1 count movement amount; unit movement amount). Set (control) the distribution of. One of the arrangement of the plurality of adjustment points in the initial state and the distribution of the change accuracy of the position of the adjustment points may be fixed, and only the other may be controlled by the adjustment point setting program. In the first embodiment, it is assumed that both the arrangement of the plurality of adjustment points in the initial state and the distribution of the change accuracy of the adjustment point positions are controlled by the adjustment point setting program. The processing of the adjustment point setting program will be described later with reference to FIG.

In S602, the control unit 102 causes the OSD generation unit 205 to generate the pattern image of the red component, the pattern image of the green component, and the pattern image of the blue component. As a result, the plurality of pattern images are displayed on the plurality of display panels and projected on the projection surface. The pattern image represents a plurality of adjustment points and a line segment between adjacent adjustment points. The width of the line segment is preferably one pixel. The user can select one adjustment point and move the selected adjustment point.

FIG. 9A shows a region 901 of the projected image before the keystone correction and a region 902 of the projected image after the keystone correction. In the prior art, for example, the pattern image 903 of FIG. 9B is displayed on the projection surface as the pattern image in the initial state. Since the keystone correction is performed, the plurality of adjustment points of the pattern image 903 are arranged at equal intervals on the projection surface. However, the vertical width of the area 901 (the area of the projection plane corresponding to the entire area of the display panel) increases toward the left. Therefore, in both the area 901 and the area 902, the pixel size on the projection surface increases toward the left. Since the registration deviation is more noticeable as the pixel size on the projection surface is larger, in the prior art, the registration deviation is likely to be insufficiently adjusted (insufficient adjustment due to insufficient adjustment points) toward the left end of the region 902.

Therefore, in the first embodiment (S601), the distribution of the conspicuousness of the registration deviation, specifically, the distribution of the pixel size on the projection surface is considered. As a result, in S602, the pattern image 904 of FIG. 9C is generated. In the pattern image 904, a plurality of adjustment points are arranged so that the density of the adjustment points increases toward the left end of the region 902. That is, the density of adjustment points is higher in the portion where the pixel size on the projection surface is large (the portion where the registration deviation is easily noticeable) than in the portion where the pixel size is small on the projection surface (the portion where the registration deviation is less noticeable). A plurality of adjustment points are arranged so as to be high. Since there are many adjustment points arranged in the portion where the registration deviation is conspicuous, the registration deviation can be reduced with high accuracy. Further, since there are few adjustment points arranged in the portion where the registration deviation is inconspicuous, it is possible to reduce the time and effort of the user when adjusting the registration deviation.

In S603, the control unit 102 determines whether or not there is an instruction to select a color component to be adjusted as an instruction from the user to the instruction input unit 106. If there is an instruction to select the color component to be adjusted, the process proceeds to S604, and if not, the process proceeds to S608.

In S604, the control unit 102 determines whether or not there is an instruction to select the adjustment point of the pattern image of the color component selected in S603 as an instruction from the user to the instruction input unit 106. If there is an instruction to select an adjustment point, the process proceeds to S605, and if not, the process proceeds to S608.

In S605, the control unit 102 determines whether or not there is an instruction to move the adjustment point selected in S604 as an instruction from the user to the instruction input unit 106. If there is an instruction to move the adjustment point, the process proceeds to S606, and if not, the process proceeds to S608. When instructed to move the adjustment point, the control unit 102 acquires (generates) information on the amount of movement of the adjustment point from the initial state (before movement) for the moved adjustment point. The range of the movement amount of the adjustment point is from the maximum movement amount M _max [pix] (upper limit of the movement amount) of the adjustment point and the minimum value ST _min [pix] (lower limit of the movement amount of 1 count) of the 1 count movement amount. , -M _max / ST _min to + M _max / ST _min . For example, when the maximum movement amount M _max of the adjustment point is 2 pixels and the minimum value ST _min of the 1-count movement amount is 0.1 pixel, the control unit 102 uses up, down, and as information on the movement amount. A count value of -20 to +20 is acquired in each of the left and right directions.

In S606, the control unit 102 stores the movement amount acquired in S605 in the first memory 111 so that the registration deviation adjustment parameter stored in the first memory 111 is updated. In the first embodiment, the coordinates of a plurality of adjustment points in the initial state (before movement) are managed for each color component, and the registration deviation adjustment parameter is managed so that the movement amount is managed for each adjustment point. In S606, among the plurality of registration deviation adjustment parameters (plural movement amounts) stored in the first memory 111, movements corresponding to the color components selected in S603 and the coordinates of the adjustment points selected in S604 are moved. The amount is updated with the movement amount acquired in S605.

In S607, the control unit 102 executes the deformation coordinate calculation program stored in the first memory 111, and generates the deformation coordinate table from the registration deviation adjustment parameters updated in S606. Since the plurality of registration deviation adjustment parameters include the coordinates of the plurality of adjustment points in the initial state (before movement) and the movement amount of each adjustment point, a plurality of adjustments after movement are performed from the plurality of registration deviation adjustment parameters. The coordinates of the points can be calculated. Then, from the coordinates of the plurality of adjustment points before the movement and the coordinates of the plurality of adjustment points after the movement, the deformation coordinate table (before the deformation) is obtained by the method described with reference to FIGS. 5 (A) and 5 (B). Correspondence between coordinates and coordinates after transformation) can be generated. The control unit 102 outputs the generated deformation coordinate table to the deformation processing unit 203. After that, the transformation processing unit 203 determines each pixel value after transformation by the method described with reference to FIGS. 5 (A) and 5 (B) using the transformation coordinate table, and transforms the entire image. As described above, a deformation coordinate table is generated for each color component, and the image is deformed.

In S608, the control unit 102 determines whether or not there is an instruction to end the registration deviation adjustment mode as an instruction from the user to the instruction input unit 106. If there is an instruction to end the registration deviation adjustment mode, the process proceeds to S609, and if not, the process returns to S603.

In S609, the control unit 102 controls the OSD generation unit 205 so as to erase the OSD image (pattern image and menu image). After that, the registration deviation adjustment process of FIG. 6 is completed, and the registration deviation adjustment mode is also completed. When the registration deviation adjustment mode ends, the normal projection mode is set, and the projection device 10 projects the image from the external device onto the projection surface in the state after the registration deviation adjustment.

FIG. 8 is a flowchart of the processing of the adjustment point setting program (S601 in FIG. 6). The process of FIG. 8 will be described.

In S801, the control unit 102 acquires the keystone correction parameter. Specifically, the control unit 102 acquires the projective transformation matrix stored in the second memory 112.

In S802, the control unit 102 acquires the distribution of the amount of deformation due to the keystone correction (the distribution of the reduction ratio (≦ 1) in the keystone correction) from the keystone correction parameter acquired in S801. Specifically, the control unit 102 calculates the amount of movement of each adjustment point by keystone correction using the projective transformation matrix acquired in S801, and the rate of change in the distance between adjacent adjustment points (rate of change by keystone correction; After keystone correction / before keystone correction) is calculated as the reduction ratio. The smaller the reduction ratio, the longer the distance from the projection device 10 to the projection surface, and the larger the pixel size on the projection surface. The plurality of adjustment points here are temporary adjustment points, and are arranged as, for example, the plurality of adjustment points 304 shown in FIG. 3 (A). The number and arrangement of adjustment points are not particularly limited as long as the distribution of the amount of deformation by keystone correction can be obtained. Points different from the adjustment points before the change (temporary adjustment points) may be used.

The method of calculating the reduction ratio will be specifically described. Here, the processing relating to the row direction (horizontal direction) of one row of a plurality of adjustment points arranged in a matrix will be described. It is assumed that N adjustment points are arranged in the horizontal direction. Therefore, the number M between adjacent adjustment points is N-1. The X coordinate (horizontal (row direction) coordinate) of each adjustment point before keystone correction is described as "XA _n ". The subscript "n" is the adjustment point number (0 to N-1). Then, the X coordinate of each adjustment point after the keystone correction is described as "XB _n ". The coordinates XB _n can be calculated from the coordinates XA _n using the projective transformation matrix acquired in S601.

Before the keystone correction, the number of pixels NA _m between adjacent adjustment points can be calculated using the following equation 1. The subscript "m" is a number (0 to M-1) of a combination of adjacent adjustment points (adjustment point pair).
_{NA m = XA n + 1 -XA} n ··· ( Equation 1)

After the keystone correction, the number of pixels NB _m between adjacent adjustment points can be calculated using the following equation 2.
NB _m = XB _{n + 1} −XB _n ... (Equation 2)

Then, the reduction ratio R _m can be calculated from the number of pixels NA _m and NB _m using the following equation 3.
R _m = NB _m / NA _m ... (Equation 3)

For other rows, the reduction ratio can be calculated in the same way. Further, the reduction ratio can be calculated in the same manner in the column direction (vertical direction).

In S803, the control unit 102 determines the coordinates of the final adjustment points according to the reduction ratio calculated in S802, and redistributes a plurality of adjustment points so that the adjustment points are arranged at the determined coordinates ( Update). In the region where the reduction ratio of the keystone correction is small, the pixel size on the projection surface is large and the registration deviation is more noticeable than in the region where the reduction ratio of the keystone correction is large. Therefore, in the first embodiment, the number of adjustment points in the region where the reduction ratio is large is increased so that the registration deviation can be reduced with high accuracy, and the adjustment points in the region where the reduction ratio is small are reduced to register. The user's effort when adjusting the ration deviation is reduced.

For example, for the adjustment point pair for which the same reduction ratio as the average of the plurality of reduction ratios calculated in S802 is calculated, the number of pixels between adjacent adjustment points is not changed. Then, the number of pixels is reduced for the adjustment point pair for which the reduction ratio smaller than the average is calculated, and the number of pixels is increased for the adjustment point pair for which the reduction ratio larger than the average is calculated.

Specifically, using Equation 4 below, the number of pixels NB _'m between adjusting points adjacent after redistribution is calculated.

Then, the coordinates XC _n of the adjustment point after redistribution are calculated (determined) using the following equations 5-1 to 5-3. As shown in Equations 5-1 and 5-3, the edge adjustment points (adjustment points on the outer circumference of the pattern image) are not changed.
XC ₀ = XB ₀ ... (Equation 5-1)
XC _N-1 = XB _N-1 ... (Equation 5-2)
_{XC n + 1 = XC n +} NB 'm (n = 0~N-3 and m = 0~M-2)
... (Equation 5-3)

For the other rows, the coordinates of the adjustment points after redistribution can be calculated in the same way. Further, in the column direction (vertical direction), the coordinates of the adjustment points after redistribution can be calculated by the same method.

In S804, the control unit 102 determines the distribution of the 1-count movement amount (accuracy of changing the position of the adjustment point) according to the reduction ratio calculated in S802. In the first embodiment, the 1-count movement amount in the region where the reduction ratio is large is reduced (the accuracy of changing the position of the adjustment point is increased) so that the registration deviation can be reduced with high accuracy. Further, the 1-count movement amount in the region where the reduction ratio is small is increased (the accuracy of changing the position of the adjustment point is lowered) so that the user's labor when adjusting the registration deviation is reduced. As described above, the region where the reduction ratio is large is the region where the pixel size on the projection surface is large, and the registration deviation is easily noticeable. The region where the reduction ratio is small is a region where the pixel size on the projection surface is small, and the registration deviation is inconspicuous.

The 1-count movement amount ST _m can be calculated using the following equation 6. In Equation 6, "ST _min " is the minimum value of the 1-count movement amount (lower limit of the 1-count movement amount), and "ST _max " is the maximum value of the 1-count movement amount (upper limit of the 1-count movement amount). is there. Then, "R _m " is the reduction ratio calculated in S802, "R _min " is the minimum value of the reduction ratio, and "R _max " is the maximum value of the reduction ratio. The reduction ratio R _min may be the minimum value of the plurality of reduction ratios calculated in S802, or may be the lower limit of the reduction ratio. The reduction ratio R _max may be the maximum value of the plurality of reduction ratios calculated in S802, or may be the upper limit of the reduction ratios.
ST _m =
(ST _max- ST _min ) x (R _m- R _min ) / (R _max- R _min )
+ ST _min
... (Equation 6)

For example, the minimum value ST _min = 0.1 pixel and the maximum value ST _max = 0.3 pixel of the 1-count movement amount are set in advance based on the average viewing limit of the registration deviation and the like. In a state where the projection device 10 faces the projection surface and an image of a predetermined size (100 inches or the like) is displayed on the projection surface (a state in which the pixel size is uniform and the predetermined size on the projection surface), the maximum value ST _max = 0. Three pixels are determined as one count movement amount ST _m . Then, as the projection device 10 becomes oblique with respect to the projection surface (oblique projection), the pixel size on the projection surface increases, and the need for fine adjustment of the registration deviation increases, the 1-count movement amount ST _m increases. Try to approach ST _min = 0.1 pixel.

Here, consider a case where the maximum movement amount Mmax of the adjustment point is 2 pixels, the minimum value STmin of the 1-count movement amount is 0.1 pixel, and the 1-count movement amount ST _m is 0.3 pixel. In this case, 3 is used as the count value corresponding to the movement amount of 0.3 pixels, and the count value of the movement amount of the adjustment point is in the range of -20 to +20 according to the instruction to move the adjustment point. It will change in 3 increments.

For other rows, the 1-count movement amount can be calculated in the same way. Further, in the column direction (vertical direction), the 1-count movement amount can be calculated by the same method.

In S805, the control unit 102 stores the coordinates (coordinates of the adjustment point) determined in S803 in the first memory 111 so that the registration deviation adjustment parameter stored in the first memory 111 is updated. .. Further, the control unit 102 stores the 1-count movement amount determined in S804 in the first memory 111 so that the distribution of the 1-count movement amount used is updated.

The above is the description of the first embodiment. The pattern image is not limited to the pattern image as shown in FIG. 9C. The user may be able to select the pattern image to be used from a plurality of pattern images. The adjustment of the registration deviation by the image processing unit 103 (deformation processing unit 203) and the adjustment of the registration deviation by the display panel driving unit 104 may be performed in combination. An example of the case where keystone correction is performed has been described, but even when other deformation processing (for example, curved surface correction) is performed, the same processing can be performed based on the distribution of the amount of deformation by the deformation processing. it can. In the case of curved surface correction, in addition to the horizontal and vertical projection angles, the radius of curvature of the projection surface is also taken into consideration. Then, the reduction ratio of each region can be calculated using the result of the user moving the adjustment point for curved surface correction.

<Embodiment 2>
Hereinafter, Embodiment 2 of the present invention will be described. In the second embodiment, the registration deviation is adjusted based on the detection results of a plurality of positions on the projection surface (distances from the projection device to the plurality of positions on the projection surface) in a state where the keystone correction is not performed. An example of enabling it to be performed suitably will be described. In the following, points different from the first embodiment (configuration, processing, etc.) will be described in detail, and description of the same points as the first embodiment will be omitted.

FIG. 10 is a flowchart of the processing of the adjustment point setting program according to the second embodiment (S601 in FIG. 6). The process of FIG. 10 will be described.

In S1001, the control unit 102 acquires the detection results of a plurality of positions on the projection surface (a plurality of relative positions with respect to the projection device 10; distances from the projection device 10 to a plurality of positions on the projection surface) from the sensor 113. To do. It is preferable that the position on the projection surface can be detected for each pixel, but it is not necessary. In the second embodiment, it is assumed that the position on the projection plane is detected at each adjustment point (temporary adjustment point; for example, the adjustment point 304 shown in FIG. 3A) before the change. The number and arrangement of adjustment points are not particularly limited as long as the distribution of positions on the projection surface can be obtained. Points different from the adjustment points before the change (temporary adjustment points) may be used.

In S1002, the control unit 102 calculates the pixel size on the projection surface from the detection result acquired in S1001. A method of calculating the pixel size will be described in detail with reference to FIG. Here, the processing relating to the row direction (horizontal direction) of one row of a plurality of adjustment points arranged in a matrix will be described. FIG. 11 is a view of the projection plane (plane) viewed from directly above. The light emitted from the projection device 10 is projected onto the projection surface 1101 to form a projected image. The sensor 113 detects the three-dimensional coordinates L _n = (X _n , Y _n , Z _n ) of the plurality of positions 1102 on the projection surface 1101. Here, for the sake of simplicity, Z _n = 0. The distance 1103 (W _m ) between adjacent positions 1102 can be calculated using the following equation 7. The distance W _m corresponds to the pixel size, and when the position on the projection surface 1101 is detected for each pixel, the distance W _m is the pixel size. For other rows, the pixel size can be calculated in the same way.

In S1003, the control unit 102 determines the coordinates of the final adjustment points according to the pixel size calculated in S1002, and redistributes a plurality of adjustment points so that the adjustment points are arranged at the determined coordinates ( Update). The reciprocal of the value obtained by normalizing the distance W _m so that the minimum value W _min of the distance W _m calculated in S1002 is 1 (1 / (W _m / W _min )) of the first embodiment (Equation 4 or the like). Used as the reduction ratio R _m . By doing so, the coordinates of the adjustment point can be calculated in the same manner as in the first embodiment (S803 of FIG. 8).

In S1004, the control unit 102 determines the distribution of the 1-count movement amount according to the pixel size calculated in S1002. The reciprocal of the value obtained by normalizing the distance W _m so that the minimum value W _min of the distance W _m calculated in S1002 is 1 (1 / (W _m / W _min )) of the first embodiment (Equation 6 or the like). Used as the reduction ratio R _m . By doing so, the 1-count movement amount can be calculated by the same method as in the first embodiment (S804 of FIG. 8).

The coordinates (coordinates of the adjustment point) determined in S1003 are stored in the first memory 111 so that the registration deviation adjustment parameter stored in the first memory 111 is updated in S1005. Further, the control unit 102 stores the 1-count movement amount determined in S1004 in the first memory 111 so that the distribution of the 1-count movement amount used is updated.

In the second embodiment, the keystone correction is not performed. Therefore, when oblique projection is performed, the projected image region becomes a trapezoidal region as shown in the region 1201 of FIG. 12 (A). In the prior art, for example, the pattern image 1202 of FIG. 12B is displayed on the projection surface as the pattern image of the initial state (S602 of FIG. 6). Multiple adjustment points are evenly spaced on the display panel. However, the vertical width of the area 1201 (the area of the projection plane corresponding to the entire area of the display panel) increases toward the left. Therefore, the distance between the adjustment points increases and the density of the adjustment points decreases toward the left. Furthermore, the pixel size on the projection plane increases toward the left. That is, the density of adjustment points is higher in the portion where the pixel size on the projection surface is large (the portion where the registration deviation is easily noticeable) than in the portion where the pixel size is small on the projection surface (the portion where the registration deviation is less noticeable). A plurality of adjustment points are arranged so as to be low. Since there are few adjustment points arranged in the portion where the registration deviation is conspicuous, the registration deviation adjustment is likely to be insufficient. Further, since there are many adjustment points arranged in the portion where the registration deviation is inconspicuous, the user has to spend a lot of time and effort to adjust the registration deviation.

In S601 of the second embodiment, similarly to the first embodiment, the distribution of the conspicuousness of the registration deviation, specifically, the distribution of the pixel size on the projection surface is taken into consideration. As a result, in S602 of the second embodiment, the pattern image 1203 shown in FIG. 12C is generated. In the pattern image 1203, a plurality of adjustment points are arranged so that the density of the adjustment points increases toward the left end of the region 1201. That is, the density of adjustment points is higher in the portion where the pixel size on the projection surface is large (the portion where the registration deviation is easily noticeable) than in the portion where the pixel size is small on the projection surface (the portion where the registration deviation is less noticeable). A plurality of adjustment points are arranged so as to be high. Since there are many adjustment points arranged in the portion where the registration deviation is conspicuous, the registration deviation can be reduced with high accuracy. Further, since there are few adjustment points arranged in the portion where the registration deviation is inconspicuous, it is possible to reduce the time and effort of the user when adjusting the registration deviation.

The above is the description of the second embodiment. The projection device 10 may have an imaging unit that images the projection surface, and the imaging result of the imaging unit may be used instead of the detection result (plural positions on the projection surface) of the sensor 113. For example, the OSD generation unit 205 may generate a predetermined image so that the predetermined image is displayed on each of the plurality of display panels. Then, the pixel size on the projection surface may be acquired based on the imaging result of the imaging unit in the state where the predetermined image is projected on the projection surface. The predetermined image is, for example, a dot pattern or a grid pattern. In the case of a dot pattern, the distance between adjacent dots (the number of pixels in the captured image) and the dot size can be acquired as values corresponding to the pixel size. In the case of a grid pattern, the distance between adjacent intersections (intersections of a plurality of lines forming the grid pattern) and the ratio of the distances can be obtained as values corresponding to the pixel size. After acquiring the pixel size (value corresponding to the pixel size), the same processing as in S1003 to S1005 of FIG. 10 may be performed. The sensor 113 and the imaging unit may be a device separate from the projection device 10, the projection device 10 may acquire the detection result from a separate sensor, or the imaging result may be acquired from the imaging unit. You may. Although the case where the projection surface is a plane has been described, the projection surface may be a curved surface. When detecting positions on the projection surface, it is preferable to detect more positions as the shape of the projection surface becomes more complicated.

As described above, according to the first and second embodiments, the arrangement of a plurality of adjustment points in the initial state and the distribution of the accuracy of changing the position of the adjustment points are based on the distribution of the conspicuousness of the registration deviation. At least one of them is controlled. This makes it possible to easily and suitably reduce the registration deviation.

It should be noted that each functional unit of the first and second embodiments (FIGS. 1 (A) and 1 (B)) may or may not be individual hardware. The functions of two or more functional units may be realized by common hardware. Each of the plurality of functions of one functional unit may be realized by individual hardware. Two or more functions of one functional unit may be realized by common hardware. In addition, each functional part may or may not be realized by hardware. For example, the device may have a processor and a memory in which the control program is stored. Then, the function of at least a part of the functional parts of the device may be realized by the processor reading the control program from the memory and executing it.

It should be noted that the first and second embodiments (including the above-described modifications) are merely examples, and the configurations obtained by appropriately modifying or changing the configurations of the first and second embodiments within the scope of the gist of the present invention. Is also included in the present invention. The present invention also includes a configuration obtained by appropriately combining the configurations of the first and second embodiments.

<Other Embodiments>
The present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by the processing to be performed. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

10: Projection device 102: Control unit 103: Image processing unit 107: Display unit 110: Projection optical system 203: Deformation processing unit 205: OSD generation unit

Claims (10)

With multiple display panels
A projection means for projecting a plurality of images displayed on the plurality of display panels onto a projection surface, and
Display control means for displaying a plurality of adjustment points on the plurality of display panels, respectively.
A changing means for changing the position of the adjustment point displayed on any of the plurality of display panels according to an instruction from the user, and
A first transforming means that deforms an image displayed on a display panel whose adjustment point positions have been changed by the changing means based on the arrangement of a plurality of changed adjustment points displayed on the display panel.
Based on the distribution of the conspicuousness of the deviation of the plurality of images on the projection surface, the arrangement of the plurality of adjustment points before the change by the changing means and the distribution of the accuracy of changing the position of the adjustment points by the changing means. A control means that controls at least one of the
A projection device characterized by having. The projection device according to claim 1, wherein the plurality of display panels display a plurality of images having different color components from each other. The control means controls the arrangement of a plurality of adjustment points before the change by the change means so that the density of the adjustment points is higher in the portion of the projection surface where the deviation is easily noticeable than in the portion where the deviation is less noticeable. The projection apparatus according to claim 1 or 2. The control means determines the accuracy of changing the position of the adjustment point by the changing means so that the accuracy of changing the position of the adjustment point is higher than that of the portion of the projection surface where the deviation is conspicuous and the deviation is less conspicuous. The projection device according to any one of claims 1 to 3, wherein the distribution is controlled. Based on the distribution of the pixel size on the projection plane, the control means has at least the arrangement of the plurality of adjustment points before the change by the change means and the distribution of the accuracy of changing the position of the adjustment points by the change means. The projection device according to any one of claims 1 to 4, wherein one of them is controlled. Further having a second deformation means, which reduces and deforms the plurality of images so that the shape of the plurality of images on the projection surface approaches a predetermined shape.
Based on the distribution of the amount of deformation by the second deformation means, the control means has a distribution of a plurality of adjustment points before the change by the change means and a distribution of accuracy of changing the position of the adjustment points by the change means. The projection device according to any one of claims 1 to 5, wherein at least one of them is controlled. Further, a detecting means for detecting a plurality of positions on the projection surface is provided.
Based on the detection result of the detection means, the control means controls at least one of the arrangement of the plurality of adjustment points before the change by the change means and the distribution of the change accuracy of the position of the adjustment points by the change means. The projection device according to any one of claims 1 to 5, wherein the projection device is characterized. Further having an imaging means for imaging the projection surface,
The display control means further displays a predetermined image on the plurality of display panels, respectively.
The control means arranges a plurality of adjustment points before the change by the change means and adjusts by the change means based on the image pickup result of the image pickup means in a state where the predetermined image is projected on the projection surface. The projection device according to any one of claims 1 to 5, wherein at least one of the distribution of the accuracy of changing the position of the point is controlled. A control method for a projection device having multiple display panels.
A projection step of projecting a plurality of images displayed on the plurality of display panels onto a projection surface,
A display control step for displaying a plurality of adjustment points on the plurality of display panels, respectively.
A change step for changing the position of an adjustment point displayed on any of the plurality of display panels according to an instruction from the user, and a change step.
A transformation step of transforming an image displayed on a display panel whose adjustment point positions have been changed by the change step based on the arrangement of a plurality of modified adjustment points displayed on the display panel.
Based on the distribution of the conspicuousness of the deviation of the plurality of images on the projection surface, the arrangement of the plurality of adjustment points before the change by the change step and the distribution of the change accuracy of the position of the adjustment points by the change step. A control step that controls at least one of the
A control method characterized by having. A program for causing a computer to function as each means of the projection device according to any one of claims 1 to 8.

Images