JP2009200613A - Projector and display adjusting method of projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technique for simply displaying one image using a plurality of projectors at low cost. <P>SOLUTION: The projector 10 includes an input section 12, an output section 14, an image processing section 20, a projection section 30, an operation section 40, and a communication section 50, and provides a video wall display. In the video processing section 20, a CPU 21 all-inclusively controls a video adjustment unit 23, an OSD engine 24 and a keystone engine 25 to implement functions of respective elements. The video adjustment unit 23 performs image processing based upon a video signal obtained by the input section 12. The OSD engine 24 generates an OSD image at need to put it together with the video signal. For example, the OSD engine 24 performs luminance adjustment processing on an overlap area and displays a cross guide for adjustment in the overlap area when performing edge blending as well as video formation of a setting image etc., of the projector 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector and a projector display adjustment method, and more particularly to a projector having a function of displaying a single image using a plurality of projectors and a projector display adjustment method.

  Conventionally, there is a technique called a video wall function for displaying one video (or image) using a plurality of projectors. For example, a plurality of projectors are installed in a matrix to form one large screen. FIG. 14 shows a “2 × 2” video wall projection in which four projectors are arranged vertically and horizontally. In order to perform such display, it is necessary to adjust the image. Therefore, the projector allows the user to adjust the hue, brightness, contrast, and the like. As the video adjustment, generally, a predetermined menu screen is displayed and a test pattern or the like is projected, and the adjustment is performed visually.

  One of the difficult tasks in this image adjustment is to make the joint between adjacent screens smooth. One commonly used technique is edge blending. In this method, an overlap area is provided between images, and the luminance in the overlap area gradually becomes darker from the overlap start point indicating the boundary between each image and the overlap area toward the overlap at the end of the overlap area. To do.

If edge blending is not performed properly, the displayed image may be unsightly, and various techniques have been proposed. For example, in the technique disclosed in Patent Document 1, an image processing device called an edge blend board is mounted on a personal computer, and an image projected on a screen from a projector is photographed by a camera to adjust the projector. Specifically, an identity conversion function is set on the edge blend board, and projectors are projected one by one in order while sequentially changing the luminance of the graphics board output. Then, an image on the screen is taken with the camera, and each measured value is obtained as a luminance sensitivity characteristic between the projector and the camera. Based on each luminance sensitivity characteristic, a luminance correction value for correcting the luminance difference between each projector to zero Ask. Further, the reference brightness conversion function is corrected according to the brightness correction value to set a brightness conversion function unique to each edge blend board, and images whose brightness is corrected according to the brightness conversion function are continuously arranged and displayed on the screen. By performing such processing, the seam of the image is displayed smoothly.
Japanese Patent Laid-Open No. 2002-238064

  By the way, the technique disclosed in Patent Document 1 requires a system equipped with a dedicated video processing device and a measuring device such as a camera for measuring the brightness of the edge boundary. As a result, although automatic adjustment is possible, there are problems such as a large system, high costs, and cases where it is difficult to introduce from the standpoint of installation. It was sought after.

  An object of the present invention has been made in view of the above situation, and provides a technique that enables simple and low-cost display of a single screen using a plurality of projectors. is there.

The apparatus according to the present invention relates to a projector. This projector includes an overlapping area generating means for adjusting the brightness of an overlapping area to be overlapped with a projected image displayed by another projector by OSD (On Screen Display) when displaying a single image by combining a plurality of projected images. Prepare.
Further, the overlapping area generating unit may display a guide for appropriately overlapping the projection video in the overlapping area.
Further, keystone correction means for performing keystone correction on the projected shape of the projected image may be provided.
In addition, an imaging unit that acquires a state where the projection image is displayed may be provided, and the keystone correction unit may perform keystone correction based on the state of the projection image acquired by the imaging unit.
In addition, a communication unit that communicates with another projector, and a control unit that executes a process of displaying one image by combining the other projector and the plurality of projection images via the communication unit may be provided.
Another aspect of the present invention relates to a display adjustment method for a projector. In this method, in order to perform video wall display, a video wall image generation step for generating a video to be displayed, and a brightness of an edge blending area to be overlapped with another video in the video to be displayed, An edge blending region generating step of adjusting by OSD processing so that the original luminance is obtained when overlapping.
Further, a guide display step for OSD displaying a guide for appropriately overlapping with other images in the edge blending area may be provided.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which enables simple and low-cost to display one screen using a some projector can be provided.

Next, the best mode for carrying out the present invention (hereinafter simply referred to as “embodiment”) will be specifically described with reference to the drawings. The outline of the features of the projector described in this embodiment is as follows.
1) A 4-point keystone correction function is used for edge pixel alignment. This simplifies exact alignment of the body.
2) As blending means, an OSD function of an image processing IC loaded in a projector is used instead of a dedicated IC (Integrated Circuit), and functions equivalent to those of the dedicated IC are realized.
3) Display guides (adjustment cross guides) are displayed by the blending OSD function, thereby adjusting the display position in units of one dot and blending.
By combining these three functions, the video wall installation adjustment will be greatly simplified.

<First Embodiment>
FIG. 1 is a functional block diagram showing a configuration of the projector 10 according to the present embodiment, and mainly shows an image processing function. The projector 10 includes an input unit 12, an output unit 14, an image processing unit 20, a projection unit 30, an operation unit 40, and a communication unit 50.

  The input unit 12 acquires a video signal from an external device such as a PC (Personal computer) or a DVD (Digital Versatile Disk) player. The input unit 12 is, for example, an HDMI (High-Definition Multimedia Interface) or a D-sub interface. The output unit 14 is an interface that outputs a video signal, and is an HDMI or D-sub interface as described above.

  The image processing unit 20 includes a CPU 21, a video adjustment unit 23, an OSD engine 24, and a keystone engine 25. The video processing unit 20 converts or adjusts a video signal acquired from the input unit 12 into a predetermined format. To the projection unit 30. The OSD engine 24 and the keystone engine 25 are each configured by a dedicated IC.

  The CPU 21 executes a predetermined program together with a memory (not shown) to centrally control the video adjustment unit 23, the OSD engine 24, and the keystone engine 25, and to execute functions of these elements. Further, the CPU 21 performs input / output control of the input unit 12 and the output unit 14, performs communication control of the communication unit 50, performs display output control by the projection unit 30, and further performs user operations on the operation unit 40. And control to perform a desired operation for each component.

  Based on the video signal acquired by the input unit 12, the video adjustment unit 23 performs various image processing such as scaling processing according to a predetermined resolution, luminance adjustment, and color adjustment. The video adjusting unit 23 creates a divided video to be projected from the video signal when performing video wall display.

  The OSD engine 24 generates an OSD screen as necessary and synthesizes it with a video signal. For example, the OSD engine 24 forms a setting screen of the projector 10 and a video such as a warning. Although details will be described later, the OSD engine 24 performs the brightness adjustment processing of the overlapping area as will be described later with reference to FIG. 3C when performing edge blending, or the adjustment cross guide as a guide marker. Is displayed in the overlap area. Each process of the OSD engine 24 can be realized by using a known technique. For example, an IC that is generally available on the market as an OSD engine can express 4 bits for each of RGB colors (4,096 colors in total), and also has a blending function for displaying colored translucent colors. Further, the degree of transparency can be controlled by combining the OSD display and the video at various mixing ratios, and the brightness can be controlled by controlling the degree of transparency.

  The keystone engine 25 performs keystone correction. General keystone correction by four-point correction will be briefly described with reference to FIG. In general, the image 91 displayed on the screen may be distorted into a trapezoid due to the relative positional relationship between the projector 10 and the screen 90, and this distortion is called keystone. Correcting the keystone distortion is called keystone correction. As a keystone correction procedure, for example, as shown in the figure, the upper left corner of the image 91 on the screen 90 is first set to a desired position (FIG. 2A), and then the upper right corner (FIG. 2B). )), And then the lower right corner (FIG. 2C) and finally the lower left corner (FIG. 2E) are set to desired positions. By such a procedure, an appropriate image 91 (FIG. 2 (e)) is displayed on the screen 90. This correction processing may be performed manually or automatically. In the present embodiment, manual correction processing will be described, and an aspect in which adjustment is automatically performed while photographing with a camera in the second embodiment will be described later.

  Returning to the description of FIG. The projection unit 30 includes a lamp unit, predetermined light modulation means such as a liquid crystal panel and a DMD chip, and an optical unit such as a projection lens. The projection unit 30 receives a video signal output from the image processing unit 20 under the control of the CPU 21. Projects onto the screen 90.

  The operation unit 40 acquires an operation instruction from the user for the projector 10. The instruction may be acquired directly from an operation panel (not shown) provided in the projector 10, or the remote control light receiving unit 41 included in the operation unit 40 may acquire an instruction from the remote control 42. The acquired operation instruction is sent to the CPU 21 of the image processing unit 20.

  An edge blending process when displaying a video wall by the projector 10 having the above configuration will be described. Here, a case of “2 × 1” video wall setting in which two videos are arranged side by side and combined into one video as shown in FIG. 3 will be described. For convenience, the left and right videos are also referred to as “divided images”, and the combined video 91 is also referred to as “combined image 91”. As shown in the enlarged view of FIG. 4, when the adjustment cross guides (96a, 96b, 97a, 97b) are displayed and the corresponding guides match each other, the overlapping portions of the divided images are displayed with appropriate luminance and color. Adjust so that

  First, as shown in FIG. 3A, the video to be displayed as the combined image 91 includes two images, a first divided image 91a on the left side and a second divided image 91b on the right side. Then, the combined images 91 shown in FIG. 3B are displayed on the screen 90 by combining the two images (91a, 91b) arranged on the left and right. At the time of the combination, a region where the two images overlap (blending portions 93a and 93b) is provided.

  In the first divided image 91a, a predetermined width at the right end is set as the blending portion 93a. Similarly, in the second divided image 91b, a predetermined width at the left end is set as the blending portion 93b. The two blending portions 93a and 93b have the same width, and the same image is displayed in this area, and the luminance decreases in proportion from the inside toward the outside. FIG. 3C is a diagram showing the luminance gradient of the two blending portions 93 a and 93 b formed by the OSD engine 24. As shown in the figure, in the blending part 93a of the first divided image 91a, the luminance magnification is 100% at the start part 95a, linearly decreases toward the right end part 94a, and becomes 0% at the right end part 94a. . Similarly, in the blending unit 93b of the second divided image 91b, the luminance magnification is 100% at the start unit 95b, linearly decreases toward the left end 94b, and becomes 0% at the left end 94b. When the two blending portions 93a and 93b are properly matched, the luminance magnification at each position is combined to 100%. In addition, the brightness | luminance of the start parts 95a and 95b, the right end part 94a, and the left end part 94b is not restricted to said magnification (%). Further, the luminance gradient is not limited to linear, and it is sufficient that the luminance gradient is 100% when synthesized. Further, the brightness gradient may be set according to the target on which the video is displayed. For example, when the type of the screen 90 is changed, or when a whiteboard or a blackboard is used instead of the screen 90, an appropriate setting can be selected.

  Then, as shown in FIG. 4A, in the blending portion 93a of the first divided image 91a, an upper guide 96a is located at a predetermined position from the upper end and a lower guide 97a is located at a predetermined position from the lower end in the central portion in the width direction. Is displayed. Similarly, in the blending portion 93b of the second divided image 91b, an upper guide 96b is displayed at a predetermined position from the upper end and a lower guide 97b is displayed at a predetermined position from the lower end in the central portion in the width direction. The predetermined position may be automatically determined based on the size of the combined image 91 that is originally combined, or may be settable by the user.

  Next, as shown in FIG. 4B, when the two blending portions 93a and 93b are matched, the left and right upper guides 96a and 96b are matched, and the left and right lower guides 97a and 97b are matched. The two blending portions 93a and 93b are completely matched. When the two blending portions 93a and 93b completely match, the right end portion 94a of the blending portion 93a of the first divided image 91a matches the start portion 95b of the blending portion 93b of the second divided image 91b. . Similarly, the left end portion 94b of the blending portion 93b of the second divided image 91b matches the start portion 95a of the blending portion 93a of the first divided image 91a. At this time, the luminance of the overlapping region (blending portions 93a and 93b) is displayed as the luminance that should be originally displayed, as described with reference to FIG.

  Note that the images of the blending units 93a and 93b are synthesized by the OSD engine 24 as described above. Here, the gradation using the OSD is used for the brightness matching means for edge blending, that is, by using the OSD IC used as the OSD engine 24, the dedicated IC can be reduced. Furthermore, since the OSD is used, the center point of the brightness can be clearly seen. As described above, the adjustment cross guides (upper guides 96a and 96b, lower guides 97a and 97b) are displayed here, and four-point keystone correction is performed so that the guides overlap the guides of the left and right projectors 10. Edge blending is performed with adjacent images.

The setting procedure will be described based on the flowcharts shown in FIGS.
As shown in the flowchart of FIG. 5, first, the user arranges the two projectors 10 on the left and right (S10). Here, the projectors 10 arranged on the left side of the screen 90 are referred to as “set 1”, and the projectors 10 arranged on the right side are referred to as “set 2”.

  Next, the user operates each operation unit 40 (or the remote controller 42) of the set 1 and the set 2, calls the video wall setting screen, and performs the video wall setting of “2 × 1” (S12). More specifically, the setting is made such that set 1 displays the first divided image 91a and set 2 displays the second divided image 91b.

  Subsequently, when the user calls the edge blending adjustment mode, the OSD engine 24 adjusts the blending units 93a and 93b to a predetermined luminance by the OSD (S14). Further, the OSD engine 24 displays the adjustment cross guides (upper guides 96a and 96b, lower guides 97a and 97b) in OSD (S16). Here, the upper guides 96a and 96b and the lower guides 97a and 97b have the same shape and the same size.

  Then, the user sets the orientation of the set 1 and the set 2 so that the projection areas of the first divided image 91a and the second divided image 91b overlap with each other on the screen 90, and the projection of the set 1 and the set 2 is performed. The image to be adjusted is adjusted (S20). Here, in the process of S20, the projection video of set 1 is first adjusted (S21), and then the projection video of set 2 is adjusted with reference to the projection video of set 1 (S22).

  Based on the flowchart shown in FIG. 6, the adjustment (S21) of the projected image of the set 1 will be described. First, the user aligns the upper left corner of the first divided image 91a, which is a projected image, with the upper left edge of the screen 90 (S21a). Next, the lower left corner of the first divided image 91a is aligned with the lower left edge of the screen 90 (S21b). Subsequently, the upper right of the first divided image 91a is aligned with the upper side of the screen 90 (S21c). Finally, the lower right side of the first divided image 91a is aligned with the lower side of the screen 90 (S21d). With the above operation, the adjustment of the reference set 1 is completed (S21e). Here, the left and right edges and the upper and lower sides of the screen 90 are used as a reference for display adjustment of the first divided image 91a, but the present invention is not limited to this.

  Next, the adjustment of the projection image of the set 2 will be described based on the flowchart shown in FIG. 7 (S22). First, the user aligns the upper right of the second divided image 91b with the upper right edge of the screen 90 (S22a). Next, the lower right corner of the second divided image 91b is aligned with the lower right edge of the screen 90 (S22b). Subsequently, the upper left of the second divided image 91b is aligned with the upper side of the screen 90 (S22c). Finally, the lower left of the second divided image 91b is aligned with the lower side of the screen 90 (S22d). In the processing of S22a to S22d, the upper guide 96a of the first divided image 91a matches the upper guide 96b of the second divided image 91b, and the lower guide 97a of the first divided image 91a and the second divided image Adjustment is made so that the lower guide 97b of 91b matches. As described above, since the upper guides 96a and 96b and the lower guides 97a and 97b have the same shape and the same size, if the first divided image 91a and the second divided image 91b are adjusted to appropriate shapes, respectively. Since it can be adjusted with the accuracy of one pixel, it can be made to be completely matched. Therefore, if they do not completely match, the upper right and lower right positions of the first divided image 91a and the upper left and lower left positions of the second divided image 91b are finely adjusted (S22e). Thereby, the overlapping part of the 1st division image 91a and the 2nd division image 91b becomes the brightness which should be displayed originally in the state where it overlapped. With the above operation, the adjustment of the set 2 is completed (S22f).

  Since the set adjustment (S20) is completed by the process of S22f, the user ends the edge blending adjustment mode and ends the OSD display of the adjustment cross guide (FIG. 5: S30). This completes the video wall setting.

  As described above, according to the present embodiment, it is possible to perform edge alignment of the video wall easily and with high accuracy. In particular, edge blending using keystone correction can be performed with high accuracy because two display screens can be combined in units of one dot. Also, in edge blending, the luminance decreases as it goes to the end, so it may be difficult to grasp the position of the end. However, since the adjustment cross guide is displayed in OSD, the user can easily grasp the matching areas (blending portions 93a and 93b). Therefore, the luminance adjustment of edge blending can be simultaneously adjusted without using an expensive adjustment device as shown in the prior art. In addition, since the projector 100 and the installation jig can be adjusted without moving, the user can make adjustments using the remote control 42 in front of the actual projected image, that is, standing near the screen 90, which is very easy to operate. Easy to. Another advantage of blending edges with OSD is that it is easy to change the blend width setting. For example, when sufficient accuracy is obtained by the size of the projected image, the installation method, etc., the blending width can be narrowed to enlarge the display area.

  In the present embodiment, the processing of each of the set 1 and the set 2 is performed independently, but the present invention is not limited to this. For example, the set 1 and the set 2 may be connected by the respective communication units 50, and the set 1 may control the processing of the set 2. That is, the user can operate the set 2 via the set 1, which is the master, with the set 1 as a master and the set 2 as a slave. Note that the OSD engine 24 does not perform edge blending when performing alignment of the first and second divided images 91a and 91b described above, and only performs processing for displaying the adjustment cross guide, and the set adjustment is completed. At that time, an edge blending process may be performed. If it does in this way, in the alignment operation | work, it will become easy to grasp | ascertain the edge part (boundary) of the 1st and 2nd divisional images 91a and 91b.

<Second Embodiment>
In this embodiment, the adjustment process (S21) of set 1 and the adjustment process (S22) of set 2 performed manually in the first embodiment are automatically adjusted by photographing the screen 90 with the camera 31. In the present embodiment, 2 × 2 video wall display is performed by the four projectors 100a to 100d in the sets 1 to 4. When the four projectors in the sets 1 to 4 are not distinguished, they are referred to as “projector 100”.

  FIG. 8 is a functional block diagram of projector 100 according to the present embodiment. A configuration different from that of the projector 10 of the first embodiment will be described, and configurations having the same function are denoted by the same reference numerals and description thereof will be omitted.

  The projector 100 has a different configuration in that it includes a camera 31 that captures an image displayed on the screen 90 and an imaging control unit 32 that performs keystone correction in cooperation with the keystone engine 25 based on the image. . Here, the imaging control unit 32 is provided in the image processing unit 20.

  In this embodiment, as shown in FIG. 9, display using a “2 × 2” video wall is performed on the screen 90 using the four projectors 100 a to 100 d having the configuration shown in FIG. 8. Here, when the area of the screen 90 is divided into 2 × 2, the upper left area is the first divided area 90e, the upper right area is the second divided area 90f, the lower left area is the third divided area 90g, The lower right region is referred to as a fourth divided region 90h. A first divided image 91e is displayed in the first divided area 90e in the upper left of the screen 90, a second divided image 91f is displayed in the second divided area 90f in the upper right, and a third divided area 90g in the lower left is displayed. The third divided image 91g is displayed in the fourth divided region 90h at the lower right, and four images of the fourth divided image 91h are displayed. Then, the first to fourth divided images 91a to 91d are combined at an appropriate position, and the combined image 91 is properly displayed. Here, the projector 100a for displaying the first divided image 91e is set 1, the projector 100b for displaying the second divided image 91f is set 2, the projector 100c for displaying the third divided image 91g is set 3, and the fourth For convenience, the projector 100d that displays the divided images 91h is referred to as a set 4. Further, the configuration of the image processing unit 20 is not shown.

  FIG. 10 is a diagram schematically showing the first to fourth divided images 91e to 91h constituting the combined image 91 in the edge blending adjustment mode. As shown in the drawing, each of the first to fourth divided images 91e to 91h includes three adjustment cross guides of the first to third guides 98a to 98c in the overlapping region as described in detail below. Is displayed.

  More specifically, the first divided image 91e includes a first blending portion 99a1 extending in the vertical direction with a predetermined width near the right side, and a second blending portion 99b1 extending in the horizontal direction with a predetermined width near the lower side. And a third blending portion 99c1 in a region that overlaps when the first blending portion 99a1 and the second blending portion 99b1 extend at the lower right end. The first guide 98a1 is displayed on the upper portion of the first blending portion 99a1, the second guide 98b1 is displayed on the left portion of the second blending portion 99b1, and the center of the third blending portion 99c1. The third guide 98c1 is displayed.

  Similarly, the second divided image 91f includes a first blending portion 99a2 extending in the vertical direction with a predetermined width near the left side, a second blending portion 99b2 extending in the horizontal direction with a predetermined width near the lower side, and a lower left portion. The first blending portion 99a2 and the second blending portion 99b2 are extended from each other at the end portion, and the third blending portion 99c2 is formed in an overlapping area. The first guide 98a2 is displayed on the upper portion of the first blending portion 99a2, the second guide 98b2 is displayed on the right portion of the second blending portion 99b2, and the center of the third blending portion 99c2 is displayed. The third guide 98c2 is displayed on the screen.

  Similarly, the third divided image 91g includes a first blending portion 99a3 extending in the vertical direction with a predetermined width near the right side, a second blending portion 99b3 extending in the horizontal direction with a predetermined width near the upper side, and an upper right portion. The first blending portion 99a3 and the second blending portion 99b3 are extended from each other at the end portion, and the third blending portion 99c3 overlaps the region. The first guide 98a3 is displayed on the lower part of the first blending part 99a3, the second guide 98b3 is displayed on the left part of the second blending part 99b3, and the third blending part 99c3 A third guide 98c3 is displayed in the center.

  Similarly, the fourth divided image 91h includes a first blending portion 99a4 extending in the vertical direction with a predetermined width near the left side, a second blending portion 99b4 extending in the horizontal direction with a predetermined width near the upper side, The first blending portion 99a4 and the second blending portion 99b4 at the end portion are configured by a third blending portion 99c4 in an area that overlaps with each other when they extend. The first guide 98a4 is displayed on the lower part of the first blending part 99a4, the second guide 98b4 is displayed on the right part of the second blending part 99b4, and the third blending part 99c4 A third guide 98c4 is displayed in the center.

  When the first to fourth divided images 91e to 91h are combined, the third guides 98c1 to 98c4 of the first to fourth divided images 91e to 91h are centered when the combined image 91 is formed. It matches at the position. In the upper center, the first guide 98a1 of the first divided image 91e and the first guide 98a2 of the second divided image 91f coincide. Furthermore, on the left side of the center, the second guide 98b1 of the first divided image 91e and the second guide 98b3 of the third divided image 91g coincide. Furthermore, in the lower center part, the first guide 98a3 of the third divided image 91g and the first guide 98a4 of the fourth divided image 91h coincide. Then, on the right side of the center, the second guide 98b2 of the second divided image 91f and the second guide 98b4 of the fourth divided image 91h coincide.

  In order to realize such a video wall display, as shown in FIG. 9, the four projectors 100 are connected to each other via each communication unit 50 and the network hub 84, and one projector 100a (set 1). Is used as a master to control the other three projectors 100b to 100d to execute video wall setting. A configuration in which a PC (not shown) connected to the network controls the four projectors 100a to 100d may be employed.

  The video wall setting process with the above configuration will be described. FIG. 11 is a flowchart showing a video wall setting process in the present embodiment. In this flowchart, since the flow is almost the same as the flowchart shown in FIG.

  First, the user arranges the four projectors 100a to 100d in 2 × 2 rows and 2 columns (S10).

  Next, the user operates the operation unit 40 of the projector 100a of the set 1 to call a video wall setting screen, and performs “2 × 2” video wall setting according to the above-described arrangement (S12).

  When the edge blending adjustment mode is selected by the operation of the operation unit 40 by the user, the OSD engine 24 adjusts the luminance of the overlapping area by the OSD (S14) and displays the adjustment cross guide in the OSD (S16).

  The projector 100a in the set 1 captures the screen 90 with the camera 31, performs keystone correction by four-point correction based on the captured image, and projects the projected image of each projector 10 so as to have an appropriate shape. Is adjusted (S20). Here, the shape of the screen 90 taken by the camera 31 is used as a reference for the keystone correction. Based on the captured screen 90, the keystone engine 25 divides and sets the screen 90 into first to fourth divided regions 90e to 90h in consideration of overlapping regions, and first to fourth divided images 91e to 91e. The position on the screen 90 to display 91h is calculated. Examples of the calculated positions include the vertices of the first to fourth divided images 91e to 91h. The positions of feature points such as the screen 90 photographed by the camera 31 and the vertices of the first to fourth divided regions 90e to 90h are stored in the photographing control unit 32 and used for the video wall setting processing of each set. Is done.

  The adjustment (S21) of the projected image of the set 1 will be described based on the same processing as the flowchart shown in FIG. 6 of the first embodiment. First, the keystone engine 25 aligns the upper left corner of the first divided image 91e with the upper left corner of the first divided area 90e of the screen 90 based on the captured image of the camera 31 obtained via the imaging control unit 32 ( S21a). Next, the keystone engine 25 aligns the lower left corner of the first divided image 91e with the lower left corner of the first divided area 90e (S21b), and then sets the upper right corner of the first divided image 91e to the first division. Align with the upper right end of the area 90e (S21c). Finally, the keystone engine 25 aligns the lower right corner of the first divided image 91e with the lower right edge of the first divided area 90e (S21d). With the above operation, the adjustment of the reference set 1 is completed (S21e).

  When the adjustment of the set 1 is completed, the same process as the flowchart shown in FIG. 7 of the first embodiment, the adjustment of the set 2 is started (S22). The keystone engine 25 matches the upper right corner of the second divided image 91f with the upper right edge of the second divided region 90f of the screen 90 while referring to the video captured by the camera 31 (S22a). Next, the keystone engine 25 aligns the lower right side of the second divided image 91f with the lower right end of the second divided region 90f (S22b), and then sets the upper left side of the second divided image 91f to the second upper side. Align with the upper left edge of the divided area 90f (S22c). Finally, the keystone engine 25 aligns the lower left corner of the second divided image 91f with the lower left edge of the second divided area 90f (S22d). In the processing of S22a to S22d, the keystone engine 25 matches the first guides 98a1 and 98b2 and the third guides 98c1 and 98c2 of the first divided image 91e and the second divided image 91f. Thus, the projection image of the second divided image 91f is adjusted (S22e).

  When the adjustment of the set 2 is completed, the adjustment of the set 3 is started according to the flowchart shown in FIG. 12 (S23). The keystone engine 25 aligns the lower left corner of the third divided image 91g with the lower left edge of the third divided area 90g while referring to the video captured by the camera 31 (S23a). Next, the keystone engine 25 aligns the upper left corner of the third divided image 91g with the upper left edge of the third divided area 90g (S23c), and then sets the lower right corner of the third divided image 91g to the third divided portion. Align with the lower right end of the area 90g (S23d). In the processing of S23a to S23d, the keystone engine 25 matches the second guides 98b1 and 98b3 and the third guides 98c1 and 98c3 of the first divided image 91e and the third divided image 91g. In this manner, the projection video of the third divided image 91g is adjusted.

  When the adjustment of the set 3 is completed, the adjustment of the set 4 is started according to the flowchart shown in FIG. 13 (S24). The keystone engine 25 aligns the lower right corner of the fourth divided image 91h with the lower right edge of the fourth divided region 90h while referring to the video captured by the camera 31 (S24a). Next, the keystone engine 25 aligns the upper right of the fourth divided image 91h with the upper right end of the fourth divided region 90h (S24c), and then sets the lower left of the fourth divided image 91h to the fourth divided region. Align with the lower left end of 90h (S24d). Then, in the processing of S24a to S24d, the keystone engine 25 matches the second guides 98b2 and 98b4 and the third guides 98c2 and 98c4 of the second divided image 91f and the fourth divided image 91h. In this manner, the projection video of the third divided image 91g is adjusted. At this time, the third guides 98c1 to 98c4 of the first to fourth divided images 91e to 91h all coincide at the same position.

  As described above, according to the present embodiment, when the edge blending adjustment mode is selected, the camera 31 provided in the projector 100 can capture the screen 90 and automatically execute the video wall setting. In particular, in the setting when the number of projectors 100 used for video wall display is large, simplification of the setting work is effectively realized.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of these components, and such modifications are also within the scope of the present invention. For example, the video wall display has been described in the above embodiment, but the present invention can also be applied to a stack display in which a plurality of projectors are used to simultaneously display the same video in the same area.

It is a functional block diagram which shows the structure of the projector based on 1st Embodiment. It is a figure which shows typically the flow of the keystone correction based on 1st Embodiment. It is a figure which shows the example of the video wall display which forms and displays one combined image from two division images based on 1st Embodiment. It is the figure which showed the video wall display of the state which displayed the crosshair for adjustment based on 1st Embodiment. It is the flowchart which showed the setting procedure of the video wall display based on 1st Embodiment. It is the flowchart which showed the setting procedure of the set 1 based on 1st Embodiment. It is the flowchart which showed the setting procedure of the set 2 based on 1st Embodiment. It is a functional block diagram which shows the structure of the projector based on 2nd Embodiment. It is the figure which showed typically the state which four projectors based on 2nd Embodiment were connected via each communication part. It is the figure typically shown in the edge blending adjustment mode based on 2nd Embodiment in the state which isolate | separated the 1st-4th divided image which comprises a combined image. It is the flowchart which showed the setting procedure of the video wall display based on 2nd Embodiment. It is the flowchart which showed the setting procedure of the set 3 based on 2nd Embodiment. It is the flowchart which showed the setting procedure of the set 4 based on 2nd Embodiment. It is the figure which showed the example of the video wall display of the general 2x2 arrangement | sequence based on a prior art.

Explanation of symbols

10, 100a to 100d Projector 12 Input unit 14 Output unit 20 Image processing unit 21 CPU
23 Video adjustment unit 24 OSD engine 25 Keystone engine 30 Projection unit 31 Camera 32 Imaging control unit 40 Operation unit 41 Remote control light receiving unit 42 Remote control 50 Communication unit

Claims (7)

  A projector comprising: an overlapping area generating unit that adjusts the luminance of an overlapping area to be overlapped with a projected image displayed by another projector when an image is displayed by combining a plurality of projected images.   The projector according to claim 1, wherein the overlapping area generation unit displays a guide for appropriately overlapping the projection video in the overlapping area.   The projector according to claim 1, further comprising keystone correction means for performing keystone correction on a projection shape of the projected image. Comprising imaging means for acquiring a state in which the projected image is displayed;
The projector according to claim 3, wherein the keystone correction unit performs keystone correction based on the state of the projection image acquired by the imaging unit. Communication means for communicating with other projectors;
5. The apparatus according to claim 1, further comprising: a control unit that executes a process of displaying one image by combining the plurality of projection images with another projector via the communication unit. The projector described. In order to perform video wall display, a video wall image generation process for generating video to be displayed;
In the video to be displayed, an edge blending region generating step of adjusting the brightness of the edge blending region to be overlapped with another video by OSD processing so that the luminance is the original brightness when overlapping with the other video;
A display adjustment method for a projector, comprising:   The projector display adjustment method according to claim 6, further comprising a guide display step of performing OSD display of a guide for appropriately overlapping with other images in the edge blending region.

Images