JP2012199734A - Projection type display device, and method for controlling the projection type display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device capable of correctly and easily performing pixel deviation correction.SOLUTION: A projection type display device includes: image projection parts for projecting images based on image data; a deviation correction part for correcting a relative deviation in images between the image indicated by a first image light modulated by a first image panel and the image indicated by a second image light modulated by a second image panel; and an image storage part for storing the image data of pattern images to be projected in order to correct the relative deviation in the images. At least one of the pattern image indicated by the first image light and the pattern image indicated by the second image light is an image (AI) which indicates the position of each adjustment candidate point by a graphic within the range of a predetermined distance from an adjustment candidate point for correcting the relative deviation in the images.

Description

  The present invention relates to a projection display device and a control method for the projection display device.

  Projection display devices (projectors) that display images on projection surfaces such as screens and wall surfaces are widely used. As the projection display device, for example, there is a three-plate projection display device including three liquid crystal panels corresponding to the three primary colors of light (red (R), green (G), and blue (B)). A three-plate projection display device separates white light emitted from a light source into three color lights of red, green, and blue using a dichroic mirror, and converts the color light into image light corresponding to an image signal in each liquid crystal panel. The modulated image light output from the three liquid crystal panels is combined by the dichroic prism, and the combined image light is projected onto the projection plane by the projection optical system. The three-plate projection display device is advantageous in terms of brightness and resolution as compared with a single-plate projection display device having only one liquid crystal panel.

  In a three-plate projection display device, the relative displacement of the images of each color constituting the projected image (hereinafter referred to as “pixel displacement”) due to the relative displacement of the mounting positions of the three liquid crystal panels and the magnification aberration of the projection optical system. May also occur). In a three-plate projection display device, there is a technique for correcting pixel shift by correcting an image signal supplied to a liquid crystal panel corresponding to an adjustment color image in which pixel shift has occurred with respect to a reference color image. Known (see, for example, Patent Documents 1 and 2).

JP-A-8-201937 Japanese Patent Laid-Open No. 10-260389 Japanese Patent Laid-Open No. 05-281929

  Conventionally, when a pixel shift is adjusted, a projector displays a pattern image indicating adjustment candidate points that are candidates for positions to be adjusted on a screen. However, in the conventional pattern image, the image of the adjustment color and the image of the reference color are both substantially orthogonal grid images with the adjustment candidate point as an intersection, so that when the operator superimposes the adjustment color on the reference color It ’s hard to tell if they overlap. For this reason, for example, the operator may be forced to perform a complicated operation such as grasping that the adjustment color has passed the target position of the reference color and adjusting it for the first time, and then returning the operation. As described above, in the conventional projector, it is not easy to accurately adjust the pixel shift to the target position.

  Note that this problem is not limited to a three-plate projection display device including three liquid crystal panels, but is a problem common to a projection display device including a plurality of image panel units corresponding to a plurality of color lights that are white when combined. there were.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a projection display device that can correct pixel deviation accurately and easily.

  In order to solve at least a part of the above problems, the present invention can be realized as the following forms or application examples.

Application Example 1 A projection display apparatus that projects an image using at least a first image panel that modulates first color light and a second image panel that modulates second color light,
An image projection unit for projecting an image based on the image data;
Deviation correction for correcting a relative deviation between an image indicated by the first image light modulated by the first image panel and an image indicated by the second image light modulated by the second image panel. And
An image storage unit for storing the image data of the pattern image to be projected to correct the relative shift of the image;
With
Among the pattern images, at least one of the image indicated by the first image light and the image indicated by the second image light has a predetermined distance from an adjustment candidate point for correcting the relative deviation of the image. A projection display device, which is a first image showing a position of each of the adjustment candidate points by a figure within a range.

  In this projection display device, at least one of the image indicated by the first image light and the image indicated by the second image light in the pattern image is represented by a figure within a predetermined distance from the adjustment candidate point. It is an image which shows the position of an adjustment candidate point. Therefore, it is possible to accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the first image light and the image indicated by the second image light.

Application Example 2 The projection display device according to Application Example 1,
One of the image indicated by the first image light and the image indicated by the second image light in the pattern image is the first image, and the other is predetermined from each of the adjustment candidate points. A projection display device, which is a second image showing the position of the adjustment candidate point by a figure outside the range of the distance.

  In the projection display device, one of the image indicated by the first image light and the image indicated by the second image light is the first image, and the other is the second image. It is possible to correct the adjustment amount of the relative deviation between the image indicated by the light and the image indicated by the second image light accurately and easily.

Application Example 3 The projection display device according to Application Example 1,
Of the pattern image, a projection display apparatus in which both the image indicated by the first image light and the image indicated by the second image light are the first image.

  In this projection display device, since both the image indicated by the first image light and the image indicated by the second image light are the first image, the image indicated by the first image light and the second image light are displayed. It is possible to accurately and easily correct the adjustment amount of the relative deviation from the image indicated by.

Application Example 4 The projection display device according to Application Example 1 or Application Example 2,
The first image is a substantially orthogonal cross image with the adjustment candidate point as an intersection point, and the second image is a predetermined distance from the substantially orthogonal cross image with the adjustment candidate point as an intersection point. A projection display device, which is an image excluding a portion within the range.

  In this projection display device, the first image is a substantially orthogonal cross image with the adjustment candidate point as the intersection, and the second image is a predetermined distance from the substantially orthogonal cross image with the adjustment candidate point as the intersection. Therefore, the adjustment of the adjustment amount of the relative deviation between the image indicated by the first image light and the image indicated by the second image light can be corrected accurately and easily.

Application Example 5 The projection display device according to any one of Application Example 1 to Application Example 4,
An adjustment point instruction for selecting at least one of the plurality of adjustment candidate points in the pattern image as an adjustment point, an image indicated by image light of an adjustment color selected from among a plurality of colors at the position of the adjustment point, and the adjustment A projection display device comprising: an instruction acquisition unit that acquires an adjustment amount instruction that instructs an adjustment amount of a relative deviation from an image indicated by image light of a reference color different from a color.

  In this projection display apparatus, an adjustment point for selecting at least one point from among a plurality of adjustment candidate points as an adjustment point can be designated. Further, an adjustment color can be selected from among a plurality of colors, and an adjustment amount of a relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light can be designated. Therefore, the selection of the adjustment point and the instruction of the adjustment amount can be selected by the operator's intention, so that the flexible relative deviation can be corrected.

[Application Example 6] The projection display device according to any one of Application Examples 1 to 5,
The projection display device, wherein a neutral color image that is a color other than the adjustment color and the reference color of the plurality of colors in the pattern image is the same as the image of the reference color.

  In this projection display apparatus, since the neutral color image is the same as the reference color, the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light can be corrected accurately and easily. be able to.

[Application Example 7] The projection display device according to any one of Application Examples 1 to 6,
The projection display device, wherein the range of the predetermined distance is set so that the range of the predetermined distance does not overlap between the adjustment candidate points.

  In this projection display device, the range of the predetermined distance between the adjustment candidate points does not overlap between the adjustment candidate points, so adjustment of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light is performed. The amount can be corrected accurately and easily.

Application Example 8 A method for controlling a projection display apparatus that projects an image using at least a first image panel that modulates first color light and a second image panel that modulates second color light. And
In order to correct a relative shift between the image indicated by the first image light modulated by the first image panel and the image indicated by the second image light modulated by the second image panel. Projecting the pattern image of
Correcting the relative displacement of the image, and
Among the pattern images, at least one of the image indicated by the first image light and the image indicated by the second image light is within a predetermined distance from an adjustment candidate point for correcting a relative shift of the image. A control method for a projection display device, which is a first image showing the position of each of the adjustment candidate points by the figure.

  In the control method of the projection display device, at least one of the image indicated by the first image light and the image indicated by the second image light in the pattern image is within a predetermined distance from the adjustment candidate point. It is an image which shows the position of an adjustment candidate point with the figure. Therefore, it is possible to accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the first image light and the image indicated by the second image light.

  The present invention can be realized in various modes. For example, a projection display device, a control method for the projection display device, a computer program for realizing the functions of these methods or devices, and the computer thereof The present invention can be realized in the form of a recording medium that records the program, a data signal that includes the computer program and embodied in a carrier wave, and the like.

It is explanatory drawing which shows the external appearance structure of the projector 10 as a projection type display apparatus in 1st Example of this invention. 2 is an explanatory diagram schematically showing an optical configuration of a projector. FIG. 2 is a block diagram schematically showing an internal configuration of the projector. FIG. 6 is a flowchart illustrating a flow of pixel shift correction processing in the projector according to the first embodiment. (A) is explanatory drawing which shows pattern image PI in 1st Example, (b) is explanatory drawing which shows the image which displayed only the cross (or T character, L character) near adjustment candidate point XP, (c) is It is explanatory drawing which shows the image except the cross (or T character, L character) part of the adjustment candidate point XP vicinity. 5A is an enlarged view of a portion X in FIG. 5A, FIG. 5A is an explanatory diagram showing a state before pixel shift correction, and FIG. 5B is an explanatory diagram showing a state after pixel shift correction. It is explanatory drawing which shows the pattern image PI of a comparative example, (a) is explanatory drawing which shows the state before pixel shift correction, (b) is explanatory drawing which shows the state after pixel shift correction. It is explanatory drawing which shows the adjustment point of pattern image PI in 2nd Example, (a) is explanatory drawing which shows the state before pixel deviation correction, (b) is explanatory drawing which shows the state after pixel deviation correction. It is explanatory drawing which shows the adjustment point of pattern image PI in the modification 1, (a) is explanatory drawing which shows the state before pixel deviation correction, (b) is explanatory drawing which shows the state after pixel deviation correction.

Next, embodiments of the present invention will be described in the following order based on examples.
A. First embodiment:
A-1. Device configuration:
A-2. Pixel shift correction processing:
B. Second embodiment:
C. Variations:

A. First embodiment:
A-1. Device configuration:
FIG. 1 is an explanatory diagram showing an external configuration of a projector 10 as a projection display device in the first embodiment of the present invention. The projector 10 includes a housing 800, a projection optical system 340 provided on the front surface of the housing 800, and an operation unit 600 provided on the outer surface (for example, the upper surface) of the housing 800.

  FIG. 2 is an explanatory diagram schematically showing the optical configuration of the projector 10. FIG. 3 is a block diagram schematically showing the internal configuration of the projector 10. As shown in FIG. 2, the projector 10 includes an illumination optical system 100, a color light separation optical system 200, a relay optical system 220, and three primary colors of light (red (R), green (G), and blue (B)). 3 includes three transmissive liquid crystal panel units 300 (300R, 300G, and 300B), a dichroic prism 320, and a projection optical system 340 as light modulation units corresponding to the above.

  The illumination optical system 100 has a light source lamp and emits white light. The color light separation optical system 200 has a plurality of dichroic mirrors, and separates the white light emitted from the illumination optical system 100 into three color lights of red, green, and blue. The color light separation optical system 200 and the relay optical system 220 guide each color light to the corresponding liquid crystal panel unit 300. The illumination optical system 100, the color light separation optical system 200, the relay optical system 220, the dichroic prism 320, and the projection optical system 340 correspond to an image projection unit in the present invention.

  Each liquid crystal panel unit 300 modulates incident color light into image light representing an image corresponding to an image signal. The liquid crystal panel unit 300 corresponds to the image panel unit in the present invention.

  The dichroic prism 320 combines the three image lights modulated by the liquid crystal panel units 300. The projection optical system 340 projects the image light synthesized by the dichroic prism 320. Thereby, an image is displayed on the screen SC installed in the optical axis direction of the projection optical system 340.

  As shown in FIG. 3, the projector 10 includes a main processing unit 400, a light source lamp driving unit 110, a panel driving unit 330, a projection optical system adjustment unit 350, an image acquisition unit 412, and an operation unit 600. Have.

  The light source lamp driving unit 110 drives a light source lamp included in the illumination optical system 100 (FIG. 2). The projection optical system adjustment unit 350 adjusts the arrangement of the lens group composed of a plurality of lenses of the projection optical system 340.

  The main processing unit 400 includes a CPU 401, a display image processing unit 410, a ROM 430, and a nonvolatile memory 450. The CPU 401 controls the entire projector 10.

  The image acquisition unit 412 acquires an image signal representing an image and supplies it to the display image processing unit 410. For example, the image acquisition unit 412 acquires an RGB signal from a computer, a composite signal from a video recorder, or the like, reads out and acquires image data stored in the memory card MC.

  The display image processing unit 410 performs predetermined processing on the image signal supplied from the image acquisition unit 412, generates an image signal for driving the liquid crystal panel unit 300, and supplies the image signal to the panel drive unit 330. The panel driving unit 330 drives each liquid crystal panel unit 300 based on the supplied image signal.

  The ROM 430 of the main processing unit 400 includes a pixel shift correction unit 440. The pixel shift correction unit 440 is a computer program for executing a pixel shift correction process described later. The CPU 401 functions as a pixel shift correction unit by reading and executing the pixel shift correction unit 440 from the ROM 430. The pixel shift correction unit 440 includes an instruction acquisition unit 442 and pattern image data 446. The non-volatile memory 450 of the main processing unit 400 stores adjustment data 452 that specifies an adjustment amount in pixel shift correction. Details of the pixel shift correction will be described later.

  The operation unit 600 receives an instruction operation from the operator and outputs a signal corresponding to the operation to the main processing unit 400.

A-2. Pixel shift correction processing:
FIG. 4 is a flowchart showing a flow of pixel shift correction processing in the projector 10 of the first embodiment. Since the projector 10 is a three-plate projection display device having the three liquid crystal panel units 300, the projector 10 is projected due to relative displacement of the mounting positions of the three liquid crystal panel units 300 and magnification aberration of the projection optical system 340. In some cases, a relative shift (pixel shift) of the image indicated by the image light of each color constituting the image indicated by the image light may occur. The pixel shift correction process corrects the image signal supplied to the panel drive unit 330, thereby making the relative image of the image indicated by the adjustment color image light relative to the image indicated by the reference color image light in the image indicated by the projected image light. This is a process for correcting a shift (pixel shift). The image indicated by the adjustment color image light corresponds to the image indicated by the first image light in the present invention, and the image indicated by the reference color image light corresponds to the image indicated by the second image light in the present invention. To do.

  In the pixel shift correction process, first, an adjustment color is selected (step S110). The adjustment color is a color that is subject to pixel shift correction. In this embodiment, the reference color is set to green (G), and the adjustment color is selected from red (R) and blue (B).

  After the operator selects the adjustment color or the display color of the pattern image PI, the pixel shift correction unit 440 supplies an image signal based on the pattern image data 446 to the panel drive unit 330, and the screen SC The pattern image PI is projected and displayed on the screen (step S120).

  During the pixel shift correction process, the pattern image PI is projected. In this embodiment, the display colors of the pattern image PI are only the adjustment color and the reference color. The reference color is green and the adjustment color can be selected from red and blue.

  FIG. 5 is an explanatory diagram showing a pattern image PI in the first embodiment. The pattern image PI is an image indicating the position of the adjustment candidate point XP. The adjustment candidate point XP is a point that is a candidate for a point (adjustment point) for instructing an adjustment amount for pixel shift correction. The pattern image PI includes an adjustment color image AI and a reference color image BI.

  As shown in FIG. 5B, the adjustment color image AI constituting the pattern image PI is a cross (or T-shaped) near the adjustment candidate point XP in the lattice-like image having the adjustment candidate point XP as an intersection. (L-shaped) only. That is, the adjustment color image AI is an image indicating the position of the adjustment candidate point XP by a graphic within a range PA of a predetermined distance from the adjustment candidate point XP. The adjustment color image AI in this embodiment corresponds to the first image in the present invention.

  As shown in FIG. 5C, the reference color image BI constituting the pattern image PI is a cross (or T-shaped) near the adjustment candidate point XP in the lattice-like image having the adjustment candidate point XP as an intersection. This is an image excluding the L-shaped portion. In the reference color image BI, an intersection point obtained by extending a line around the adjustment candidate point XP is the adjustment candidate point XP. That is, the reference color image BI is an image indicating the position of the adjustment candidate point XP by a figure outside the range PA at a predetermined distance from the adjustment candidate point XP. The reference color image BI in the present embodiment corresponds to the second image in the present invention.

  In the pattern image data 446, the gradation value of each color at the position of each line of the pattern image PI is the highest gradation value, and the gradation value of each color in the portion other than each line of the pattern image PI is the lowest gradation value. Image data. Therefore, each line in the adjustment color image AI is displayed in the adjustment color, and nothing is displayed in the other portions. Further, each line in the reference color image BI is displayed in the reference color, and nothing is displayed in the other portions. Note that the thickness of each line in the pattern image PI can be set as appropriate, but in this embodiment, the thickness corresponds to one pixel of the liquid crystal panel unit 300.

  When the pattern image PI is projected and displayed, next, an adjustment point is instructed (step S130). The adjustment point is a point for instructing an adjustment amount in pixel shift correction. In this embodiment, the adjustment candidate point XP of the adjustment color image AI can be selected as the adjustment point. The instruction for the adjustment point is acquired by the instruction acquisition unit 442.

  The instruction of the adjustment point is performed on the pattern image PI shown in FIG. The operator can select one adjustment point from the adjustment candidate points XP of the adjustment color image AI by operating the operation unit 600.

  After the adjustment point instruction, an instruction for an adjustment amount for pixel shift correction is made (step S140). The adjustment amount is a value that specifies how much the adjustment point is moved in which direction. That is, the “adjustment amount” in the present embodiment is a concept including not only the movement amount of the adjustment point but also the movement direction of the adjustment point. The instruction for the adjustment amount is acquired by the instruction acquisition unit 442.

  The adjustment amount is instructed when the pattern image PI is projected and displayed. By operating the operation unit 600, the relative pixel deviation between the adjustment color image AI projected and displayed on the pattern image PI and the reference color image BI can be adjusted. When the adjustment amount is instructed, pixel shift correction is executed (step S150).

  The pixel shift correction unit 440 divides the entire pattern image PI displayed on the screen SC into a plurality of triangular regions having vertices at any two of the four corners and the adjustment points. The triangular area before adjustment and the triangular area after adjustment are different in the position of the adjustment point before and after the adjustment, and affine transformation is calculated in order to adjust the entire pattern image PI. Note that the two points selected from the four corners of the pattern image PI forming each triangular area are the same before and after adjustment. By such affine transformation, the coordinate values of the pixels of the adjustment color image AI and the reference color image BI before and after the adjustment point position adjustment are uniquely determined.

  The pixel shift correction unit 440 converts the coordinate value of each pixel of the image after correction into the coordinate value of each pixel of the image before correction using the calculated conversion, and converts the pre-correction image signal in the converted coordinate value. A gradation value is calculated by interpolation, and a corrected image signal is generated. The pixel shift correction unit 440 supplies an image signal obtained by correcting the image signal based on the pattern image data 446 to the panel drive unit 330. As a result, the projected and projected pattern image PI is updated to an image corresponding to the corrected pattern image signal, and the relative deviation of the image indicated by the adjustment color image light with respect to the image indicated by the reference color image light is instructed. It is corrected by the correction amount. Thereafter, the corrected pattern image PI is displayed on the screen SC.

  FIG. 6 is an enlarged view of a portion X in FIG. In FIG. 6, the pixel shift is a relative shift between the adjustment point of the adjustment color image AI (hereinafter referred to as adjustment point CPa) and the adjustment point of the reference color image BI (hereinafter referred to as adjustment point CPb). is there. The operator can move the adjustment point CPa by operating the operation unit 600. In order to correct the pixel shift, the adjustment point CPa is superimposed on the position of the adjustment point CPb. In this embodiment, the adjustment amount of one unit is set to ¼ of the pixel interval of the liquid crystal panel unit 300.

  FIG. 6A is an explanatory diagram illustrating a state before pixel shift correction in the present embodiment. There is a relative deviation between the adjustment point CPa and the adjustment point CPb. In order to correct the pixel shift, by operating the operation unit 600, the adjustment point CPa is moved and superimposed on the position of the adjustment point CPb. In the present embodiment, the operation is performed so as to move in the upward direction and the left direction (the arrow direction in the figure). Thereby, as shown in FIG. 6B, the positions of the adjustment point CPa and the adjustment point CPb overlap, and the pixel shift at the adjustment point instructed to be selected is corrected.

  The pixel shift correction unit 440 determines whether or not the adjustment for the selected adjustment point CPa is confirmed after the pixel shift correction (step S160). Specifically, after the pixel shift correction, when the operator performs an adjustment amount instruction operation via the operation unit 600, the pixel shift correction unit 440 determines that the adjustment has not been confirmed, and the adjustment amount instruction Acquisition (step S140) and pixel shift correction (step S150).

  Thus, in the present embodiment, the adjustment amount instruction for a certain adjustment point CPa can be executed continuously. The operator confirms the pattern image PI projected and displayed, and adjusts the adjustment amount so that the adjustment point CPa of the adjustment color image AI moves to (or approaches) the adjustment point CPb of the reference color image BI. The instructions are given.

  After the pixel shift correction (step S150), when the operator performs an adjustment confirmation operation for the current adjustment point CPa via the operation unit 600 (step S160: YES), the pixel shift correction unit 440 performs the current adjustment. The amount is stored as adjustment data 452 in the nonvolatile memory 450 (step S170).

  Next, the pixel shift correction unit 440 determines whether or not the pixel shift correction for the selected adjustment color image AI has been completed (step S180). The operator operates the operation unit 600 to select the next adjustment point CPa from the plurality of adjustment candidate points XP in the selected adjustment color image AI. It is also possible to select the adjustment point CPa that has been selected immediately before. After selecting the adjustment point CPa, the adjustment amount is instructed (step S130), and pixel shift correction is executed (step S140). As described above, in this embodiment, the adjustment amount of the pixel shift at the position of each adjustment point CPa can be individually indicated.

  After such an operation is repeated, when the pixel shift correction unit 440 is instructed to complete the pixel shift correction for the image AI of the selected adjustment color (step S180: YES), the pixel shift correction unit 440 The pixel shift correction for the image AI is finished. On the other hand, when the pixel shift correction is not completed for the selected adjustment color image AI (step S180: NO), the pixel shift correction unit 440 returns to the processing after the selection of the adjustment point CPa (step S130).

  Thereafter, when the start of pixel shift correction for the image AI of another adjustment color is selected (step S190: NO), the pixel shift correction (process after step S110) is executed for the image AI of the selected adjustment color. Is done. On the other hand, when completion of pixel shift correction for all colors is selected (step S190: YES), the pixel shift correction unit 440 ends the pixel shift correction processing.

  As described above, in the projector 10 of the present embodiment, the adjustment color image AI of the projected and displayed pattern image PI is an adjustment candidate using a cross-shaped figure within a predetermined distance range PA from the adjustment candidate point XP. It is an image which shows the position of the point XP. For this reason, in the adjustment color image AI, there is no image other than the vicinity of the adjustment candidate point XP, and it is not complicated. Therefore, it is easy to accurately move the adjustment point CPa to the position of the adjustment point CPb. Accordingly, the projector 10 according to the present embodiment can correct the correction amount of the pixel shift between the image indicated by the adjustment color image light and the image indicated by the reference color image light accurately and easily.

  FIG. 7 is an explanatory diagram showing a pattern image PI of a comparative example. In the pattern image PI of the comparative example, the adjustment color image AI is a lattice-like image, and the intersection of the lattices is the adjustment candidate point XP. The reference color image BI is also a grid-like image, and the intersection of the grids is the adjustment candidate point XP. In this comparative example, there is an overlapping portion LA where the adjustment color image AI and the reference color image BI overlap. The color of the overlapping portion LA is a composite color of the adjustment color and the reference color. Since the adjustment color image AI is an image displaying a grid-like figure other than the vicinity of the adjustment candidate point XP, there is an overlapping portion LA when the adjustment point CPa is moved to the position of the adjustment point CPb. The image is complicated and adjustment is not easy.

  Further, in the projector 10 of the present embodiment, as shown in FIG. 6, the adjustment color image AI is an image showing the position of the adjustment candidate point XP by a cross figure within a range PA of a predetermined distance from the adjustment candidate point XP. It is. The reference color image BI is a figure outside a range PA of a predetermined distance excluding a cross-shaped figure within a range PA of a predetermined distance from the adjustment candidate point XP from a grid-like image having the adjustment candidate point XP as an intersection. It is an image which shows the position of adjustment candidate point XP. Therefore, the adjustment color image AI and the reference color image BI do not overlap at the time of adjustment, and the adjustment amount can be easily recognized. Therefore, the projector 10 according to the present embodiment can accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light.

  In the projector 10 according to the present embodiment, the adjustment color image AI is a substantially cross-shaped image having the adjustment candidate point XP of the adjustment color image AI as an intersection. Therefore, the adjustment color image AI is the simplest image as the adjustment color image. Therefore, it is easy to recognize the positions of the adjustment point CPa and the adjustment point CPb. Therefore, the projector 10 according to the present embodiment can accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light.

  In the projector 10 according to the present embodiment, the range PA of the predetermined distance from the adjustment candidate point XP does not overlap between the adjustment candidate points XP. Therefore, the image BI of each reference color is displayed between the closest adjustment candidate points XP, and the position of the adjustment candidate point XP can be easily recognized. Therefore, the projector 10 according to the present embodiment can accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light.

  In the projector 10 of the present embodiment, the operator can select and designate one point as the adjustment point CPa from the plurality of adjustment candidate points XP. The operator can instruct the adjustment amount of the adjustment point CPa that has been selected and instructed via the operation unit 600. Therefore, in the projector 10 of the present embodiment, since the operator can select the adjustment point CPa and instruct the adjustment amount, it is possible to perform flexible relative deviation correction.

B. Second embodiment:
FIG. 8 is an explanatory diagram showing adjustment points of the pattern image PI in the second embodiment. The pixel shift correction process in the second embodiment is the same as the first embodiment except that the pattern image PI projected on the screen SC is different from the first embodiment.

  As shown in FIG. 8, in the second embodiment, the reference color image BI constituting the pattern image PI is also adjusted in the lattice-like image having the same adjustment candidate point XP as the adjustment color image AI. This is an image displaying only a cross (or T-shaped or L-shaped) near the candidate point XP. That is, in the second embodiment, both the adjustment color image AI and the reference color image BI are images indicating the position of the adjustment candidate point XP by a graphic within a range PA of a predetermined distance from the adjustment candidate point XP. ing. The adjustment color image AI and the reference color image BI in the second embodiment correspond to the first image in the present invention. In FIG. 8, the cross-shaped figures having the adjustment candidate points XP of the adjustment color image AI and the reference color image BI as intersections have the same size, but they may have different sizes.

  The operator can move the adjustment point CPa by operating the operation unit 600 as in the first embodiment. In order to correct the pixel shift, the adjustment point CPa is superimposed on the position of the adjustment point CPb.

  In the second embodiment, when the adjustment point CPa is superimposed on the position of the adjustment point CPb, the cross graphic of the adjustment color image AI and the cross graphic of the reference color image BI partially or entirely overlap. The color of the overlapping portion LA is displayed as a composite color of the adjustment color image AI and the reference color image BI.

  In the reference color image BI, unlike the first embodiment, the adjustment point CPb is an intersection of crosses, and therefore the position of the adjustment point CPb is clear. Therefore, it is easy to move the adjustment point CPa to the exact position of the adjustment point CPb.

  As described above, in the projector 10 of the second embodiment, the image AI of the adjustment color among the pattern images PI projected and displayed is adjusted by a cross figure within the range PA of a predetermined distance from the adjustment candidate point XP. It is an image which shows the position of candidate point XP. For this reason, in the adjustment color image AI, there is no image other than the vicinity of the adjustment candidate point XP, and it is not complicated. Therefore, the adjustment point CPa can be easily moved to the position of the adjustment point CPb. Therefore, the projector 10 according to the second embodiment can correct the correction amount of the pixel shift between the image indicated by the adjustment color image light and the image indicated by the reference color image light accurately and easily.

  In the projector 10 of the second embodiment, the reference color image BI among the pattern images PI projected and displayed is also a cross within a range PA of a predetermined distance from the adjustment candidate point XP in the same manner as the adjustment color image AI. It is an image which shows the position of the adjustment candidate point XP by the figure. Therefore, as compared with the first embodiment, the position of the adjustment point CPb is displayed as an intersection of cross-shaped figures, and the position to move the adjustment point CPa is clear. Accordingly, the projector 10 according to the second embodiment can accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light.

  In the projector 10 of the second embodiment, the adjustment color image AI is a substantially orthogonal cross image with the adjustment candidate point XP of the adjustment color image AI as an intersection. Therefore, the adjustment color image AI is the simplest image as the adjustment color image. Therefore, it is easy to recognize the positions of the adjustment point CPa and the adjustment point CPb. Accordingly, the projector 10 according to the second embodiment can accurately and easily correct the adjustment amount of the relative deviation between the image indicated by the adjustment color image light and the image indicated by the reference color image light.

C. Variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

C1. Modification 1:
The configuration of the projector 10 in the above embodiment is merely an example and can be variously modified. FIG. 9 is an explanatory diagram illustrating adjustment points of the pattern image PI in the first modification. As in the above embodiments, the adjustment color image AI is a cross image that is substantially orthogonal with the adjustment candidate point XP of the adjustment color image AI as an intersection. On the other hand, the reference color image BI is a lattice-like image, and the intersection of the lattices is the adjustment candidate point XP. Even in this modification, the adjustment color image AI has no image other than the vicinity of the adjustment candidate point XP and is not complicated, and therefore, the adjustment point CPa can be easily moved to the position of the adjustment point CPb.

C2. Modification 2
In each of the embodiments described above, the adjustment color image AI is a substantially orthogonal cross image with the adjustment candidate point XP of the adjustment color image AI as an intersection, and the reference color image BI has the adjustment candidate point XP as an intersection. It is an image obtained by removing a cross (or T-shaped or L-shaped) portion in the vicinity of the adjustment candidate point XP in the lattice-shaped image, or a substantially orthogonal cross image having the adjustment candidate point XP as an intersection. However, the images of the adjustment color image AI and the reference color image BI may be interchanged.
In each of the above embodiments,

C3. Modification 3:
In each of the above embodiments, the display color of the pattern image PI is only the adjustment color and the reference color, and the neutral color is not displayed. However, the neutral color image is the same as the reference color image BI, and the neutral color is displayed. A color may be displayed. In this case, the reference color image BI is an image of a composite color of the reference color and the neutral color.

C4. Modification 4:
In each of the above-described embodiments, the image indicating the position of the adjustment candidate point XP by the graphic of the range PA with a predetermined distance from the adjustment candidate point XP is the adjustment candidate point XP in the lattice-like image having the adjustment candidate point XP as an intersection. Although an image displaying only the nearby cross (or T-shaped or L-shaped) is shown, an image showing the position of the adjustment candidate point XP may be displayed by a figure having another shape (for example, a rectangle).

C5. Modification 5:
In each of the above embodiments, the image indicating the position of the adjustment candidate point XP by the graphic outside the range PA of the predetermined distance from the adjustment candidate point XP is the adjustment candidate point in the lattice-like image having the adjustment candidate point XP as an intersection. The image excluding the cross (or T-shaped or L-shaped) portion in the vicinity of XP is used. For example, other images such as a horizontal straight line image in which a vertical straight line in a grid-like image is not displayed are displayed. It is good also as an image which shows the position of adjustment candidate point XP with a figure of shape. Even in this case, the adjustment color image AI can indicate the position of the adjustment candidate point XP by a graphic within a range PA of a predetermined distance from the adjustment candidate point XP.

C6. Modification 6:
In each of the embodiments described above, the projector 10 uses a transmissive liquid crystal panel as the light modulation unit, but a reflective liquid crystal panel, a micromirror array device, or the like may be used. The illumination optical system 100 includes a self-light emitting element including a discharge light source lamp made of an ultrahigh pressure mercury lamp, a metal halide lamp, or the like as a light source lamp, or a solid light source such as an organic EL element, a silicon light emitting element, a laser diode, or an LED May be adopted.

C7. Modification 7:
In each of the above embodiments, the image indicated by the adjustment color image light corresponds to the image indicated by the first image light in the present invention, and the image indicated by the reference color image light is indicated by the second image light in the present invention. It may be the opposite, but may be reversed.

  In addition, among the constituent elements in the above-described embodiment, elements other than the elements described in the independent claims are additional elements, and can be omitted or combined as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Projector 100 ... Illumination optical system 110 ... Light source lamp drive part 200 ... Color light separation optical system 220 ... Relay optical system 300 ... Liquid crystal panel part 320 ... Dichroic prism 330 ... Panel drive part 340 ... Projection optical system 350 ... Projection optical system adjustment Unit 400 ... Main processing unit 401 ... CPU
410 ... Display image processing unit 412 ... Image acquisition unit 440 ... Pixel shift correction unit 442 ... Instruction acquisition unit 446 ... Pattern image data 450 ... Non-volatile memory 452 ... Adjustment data 600 ... Operation unit 800 ... Housing PA ... A predetermined distance Range LA ... Overlapping part SC ... Screen PI ... Pattern image AI ... Adjustment color image BI ... Reference color image XP ... Adjustment candidate point CPa ... Adjustment color image AI adjustment point CPb ... Reference color image BI adjustment point

Claims (8)

A projection display device that projects an image using at least a first image panel that modulates first color light and a second image panel that modulates second color light,
An image projection unit for projecting an image based on the image data;
Deviation correction for correcting a relative deviation between an image indicated by the first image light modulated by the first image panel and an image indicated by the second image light modulated by the second image panel. And
An image storage unit for storing the image data of the pattern image to be projected to correct the relative shift of the image;
With
Among the pattern images, at least one of the image indicated by the first image light and the image indicated by the second image light has a predetermined distance from an adjustment candidate point for correcting the relative deviation of the image. A projection display device, which is a first image showing a position of each of the adjustment candidate points by a figure within a range. The projection display device according to claim 1,
One of the image indicated by the first image light and the image indicated by the second image light in the pattern image is the first image, and the other is predetermined from each of the adjustment candidate points. A projection display device, which is a second image showing the position of the adjustment candidate point by a figure outside the range of the distance. The projection display device according to claim 1,
Of the pattern image, a projection display apparatus in which both the image indicated by the first image light and the image indicated by the second image light are the first image. The projection display device according to claim 1 or 2, wherein
The first image is a substantially orthogonal cross image with the adjustment candidate point as an intersection point, and the second image is a predetermined distance from the substantially orthogonal cross image with the adjustment candidate point as an intersection point. A projection display device, which is an image excluding a portion within the range. A projection display device according to any one of claims 1 to 4,
An adjustment point instruction for selecting at least one of the plurality of adjustment candidate points in the pattern image as an adjustment point, an image indicated by image light of an adjustment color selected from among a plurality of colors at the position of the adjustment point, and the adjustment A projection display device comprising: an instruction acquisition unit that acquires an adjustment amount instruction that instructs an adjustment amount of a relative deviation from an image indicated by image light of a reference color different from a color. The projection display device according to claim 5,
The projection display device, wherein a neutral color image that is a color other than the adjustment color and the reference color of the plurality of colors in the pattern image is the same as the image of the reference color. A projection display device according to any one of claims 1 to 6,
The projection display device, wherein the range of the predetermined distance is set so that the range of the predetermined distance does not overlap between the adjustment candidate points. A control method for a projection display device that projects an image using at least a first image panel that modulates first color light and a second image panel that modulates second color light,
In order to correct a relative shift between the image indicated by the first image light modulated by the first image panel and the image indicated by the second image light modulated by the second image panel. Projecting the pattern image of
Correcting the relative displacement of the image, and
Among the pattern images, at least one of the image indicated by the first image light and the image indicated by the second image light is within a predetermined distance from an adjustment candidate point for correcting a relative shift of the image. A control method for a projection display device, which is a first image showing the position of each of the adjustment candidate points by the figure.

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