JP2013077988A - Projector and control method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of performing geometrical correction of a projected image by itself alone with good operability.SOLUTION: A projector 1 individually defines each vertex of contours of an image on the basis of image information and a predetermined point disposed on each side of the contours as control points CP1 through CP8, and causes a user to select one of the plurality of control points as a selection control point. Further, the projector 1 causes the selection control point selected to be moved in the image on the basis of key operation of the user. Furthermore, the projector 1 forms the contours of the image such that the contours pass through the selection control point moved and further corrects the image information such that the image information is contained in the contours formed. Yet furthermore, the projector 1 projects image light on the basis of the image information corrected.

Description

  The present invention relates to a projector and a projector control method.

  Conventionally, a method of geometrically correcting a projected image projected from a projector on a computer user interface screen is known. For example, in a geometric correction interface using auxiliary lines, an area on the user interface screen is simulated and reduced by a computer-side application to provide a virtual correction area, and the auxiliary line that has gone out of the screen It is known that even if the display has a resolution lower than the panel size of the projector, correction using auxiliary lines can be performed (Patent Document 1).

Japanese Patent No. 3845386

  However, in the correction method of Patent Document 1, it is necessary to use a computer incorporating a correction application in order to perform geometric correction of the projection screen of the projector. For this reason, correction cannot be performed with the projector alone. In addition, when correcting the screen, the user has to perform the correction while comparing the computer display screen with the projection screen projected from the projector. For this reason, a projector capable of performing geometric correction (shape correction) of a projected image by itself with high operability has been demanded.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector that projects an image based on image information, an operation receiving unit that receives an input operation, each vertex of the contour of the image based on the image information, and A control point selection unit that selects a predetermined point arranged on each side of the contour as a control point and selects one of the plurality of control points as a selection control point, and a selection selected by the control point selection unit A control point moving unit that moves a control point in the image based on the input operation, and a contour of the image formed so as to pass through the selected control point moved by the control point moving unit. And an image correction unit that corrects the image information so as to be within the range.

  According to such a projector, the operation receiving unit receives an input operation. The control point selection unit uses each point of the contour of the image and a predetermined point arranged on each side of the contour as control points, and selects one of them as a selection control point. The control point moving unit moves the selected control point in the image based on the input operation. The image correcting unit forms an outline of the image so as to pass through the selected control point moved by the control point moving unit, and corrects the image information so as to be within the formed outline. As a result, the user can correct the shape of the contour of the image by moving the selection control point. Then, the projector corrects the image information so as to fit in the contour whose shape has been corrected. Therefore, the geometric shape correction of the image based on the image information can be performed by the projector alone.

  Application Example 2 In the projector according to the application example, the image correction unit forms the contour of the image so as to connect the selection control point and the adjacent control point with a curve.

  According to such a projector, the image correction unit forms an image in which the selection control point and the adjacent control point are connected by a curve. As a result, the image has a contour including a curve, and the image information corrected by the image correction unit represents a curved image. Thus, by projecting a curved image, it becomes possible to cancel the curvature distortion of the image when the projection surface is a curved surface.

  Application Example 3 In the projector according to the application example described above, the predetermined point is arranged at least one point on each side of the contour.

  According to such a projector, at least one predetermined point is arranged on each side of the contour. As a result, it is possible to form an image outline with a total of eight or more control points combined with the four vertices, thereby realizing simple and effective operability.

  Application Example 4 In the projector according to the application example, the default position of the predetermined point is arranged at the center of each side of the contour.

  According to such a projector, the default position of the predetermined point is the center of each side of the contour. This makes it possible to form the image forming area with a good balance.

  Application Example 5 In the projector according to the application example described above, it is possible that the predetermined point is movable on a line segment connecting the default position and the center position of the image based on the input operation. To do.

  According to such a projector, the predetermined point can be moved on a line segment connecting the default position and the center position of the pixel region. As a result, software processing such as image formation region formation processing and image information correction processing can be simplified.

  Application Example 6 A projector control method according to this application example is a projector control method that includes an operation reception unit that receives an input operation and projects an image based on image information, and the image based on the image information. A control point selection step for selecting each vertex of the outline and a predetermined point arranged on each side of the outline as a control point, and selecting one of the plurality of control points as a selection control point, and the control The control point moving step for moving the selected control point selected in the point selecting step in the image based on an input operation, and the image passing through the selected control point moved in the control point moving step. And an image correcting step for correcting the image information so as to fit within the formed contour.

  According to such a projector control method, the user can correct the shape of the contour of the image by moving the selection control point. Then, the projector corrects the image information so as to fit in the contour whose shape has been corrected. Therefore, the geometric shape correction of the image based on the image information can be performed by the projector alone.

  When the projector and the projector control method described above are constructed using a computer provided in the projector, the above form and the application example are a program for realizing the function, or the program. Can be configured in the form of a recording medium or the like that is recorded so as to be readable by the computer. Recording media include flexible disk, HDD (Hard Disk Drive), CD-ROM (Compact Disk Read Only Memory), DVD (Digital Versatile Disk), Blu-ray Disc (registered trademark), magneto-optical disk, nonvolatile memory card Use various media that can be read by the computer, such as projector internal storage (semiconductor memory such as RAM (Random Access Memory) and ROM (Read Only Memory)), and external storage (USB memory, etc.) Can do.

1 is a block diagram showing a schematic configuration of a projector according to an embodiment. Explanatory drawing of the menu image of a projector. The figure which shows the projection image on which the control point area selection image of the bow correction was displayed. It is a figure which shows the projection image on which the bow-shaped correction | amendment adjustment image was displayed, (a) is a figure which shows the projection image containing the adjustment image of a corner | angular part, (b) shows the projection image containing the adjustment image of a side part Figure. The flowchart of the process in case the projector is performing bow correction. The top view which shows the pixel area | region where the bow correction was performed.

  Hereinafter, embodiments will be described.

(Embodiment)
In the present embodiment, a projector capable of correcting the shape of a projected image by a user operation will be described.

FIG. 1 is a block diagram illustrating a schematic configuration of a projector according to the present embodiment. The internal configuration of the projector will be described with reference to FIG.
As shown in FIG. 1, the projector 1 includes an image projection unit 10, a control unit 20, a light source control unit 21, an operation reception unit 22, an operation signal reception unit 23, a remote control 24, an image information input unit 30, an image processing unit 31, An OSD processing unit 32, an image correction unit 33, and the like are provided.

  The image projection unit 10 includes a light source device 11 as a light source, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive unit 14, and the like. The image projection unit 10 modulates the light emitted from the light source device 11 into image light by the liquid crystal light valves 12R, 12G, and 12B, and projects the image light from the projection lens 13 to display an image on the projection surface S.

  The light source device 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. Has been. The light emitted from the light source device 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), which are the three primary colors of light by a color separation optical system (not shown), After being separated into blue (B) color light components, they are incident on the liquid crystal light valves 12R, 12G, and 12B, respectively.

  The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal light valves 12R, 12G, and 12B include a rectangular pixel region in which a plurality of pixels (not shown) are arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel. Yes. When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. For this reason, the light emitted from the light source device 11 is modulated by transmitting through the pixel regions of the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected by the projection lens 13.

  The control unit 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, a nonvolatile ROM (Read Only Memory), and the like, and is stored in the ROM. When the CPU operates according to the control program, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer.

  The light source control unit 21 controls lighting of the light source device 11 (light source lamp 11a) based on an instruction from the control unit 20. Specifically, the light source control unit 21 can turn on the light source lamp 11a by supplying predetermined power to the light source lamp 11a, and can stop the supply of power and turn off the light source lamp 11a. The light source control unit 21 can adjust the luminance (brightness) of the light source lamp 11a by controlling the power supplied to the light source lamp 11a based on an instruction from the control unit 20.

  The operation receiving unit 22 receives an input operation from the user, and includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the operation accepting unit 22 include a power key for switching on / off the power, an input switching key for switching an input image signal, and display / non-display of a menu image for performing various settings. Menu key to switch, four direction keys corresponding to up / down / left / right (up direction key, down direction key, left direction key, right direction key), enter key for determining various settings, ESC used for canceling operation, etc. Escape) key. When the user operates (presses) various operation keys of the operation reception unit 22, the operation reception unit 22 receives this input operation and outputs an operation signal corresponding to the operation content of the user to the control unit 20.

  The remote controller 24 includes a plurality of operation keys, like the operation receiving unit 22. When the user operates various operation keys of the remote controller 24, the remote controller 24 generates an operation signal such as an infrared ray corresponding to the operation content of the user, and the operation signal receiving unit 23 receives this and transmits it to the control unit 20. Here, the operation signal receiving unit 23 that receives the operation signal of the operation receiving unit 22 or the remote controller 24 corresponds to the operation receiving unit in the claims.

  The image information input unit 30 includes a plurality of input terminals, and various types of image information are input to these input terminals from an external image supply device (not shown) such as a video playback device or a personal computer. The image information input unit 30 outputs the input image information to the image processing unit 31.

  The image processing unit 31 defines the image information input from the image information input unit 30 as image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B, that is, a drive voltage applied to each pixel. Convert to image information. Further, the image processing unit 31 performs an image quality adjustment process for adjusting the image quality such as brightness, contrast, sharpness, hue, and the like on the converted image information based on an instruction from the control unit 20. Are output to the OSD processing unit 32.

  The OSD processing unit 32 performs OSD (on-screen display) such as a menu image and a message image on an image based on input image information (hereinafter also referred to as “input image”) based on an instruction from the control unit 20. A process for superimposing and displaying an image is performed. The OSD processing unit 32 includes an OSD memory (not shown) and stores OSD image information representing graphics, fonts, and the like for forming an OSD image. When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 32 reads the necessary OSD image information from the OSD memory, and the image processing unit so that the OSD image is superimposed at a predetermined position on the input image. The OSD image information is combined with the image information input from 31. The image information combined with the OSD image information is output to the image correction unit 33. If there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 32 outputs the image information input from the image processing unit 31 to the image correction unit 33 as it is.

  The image correction unit 33 performs a process (also referred to as “bow correction” process) for correcting a curvature distortion that occurs when an image is projected onto the projection surface S having a curved surface. Specifically, the image correction unit 33 sets an image forming region having a shape that cancels the curved distortion in the pixel regions of the liquid crystal light valves 12R, 12G, and 12B based on an instruction from the control unit 20, The image information input from the OSD processing unit 32 is corrected so that an input image is formed in the image forming area, and a black pixel value, that is, a light transmittance is set for pixels outside the image forming area. Is set to a pixel value that minimizes.

  The image correction unit 33 outputs the image information corrected as described above to the liquid crystal drive unit 14. Here, since the projection surface S of the present embodiment is concave, the image projected on the projection surface S is displayed in a barrel shape. For this reason, by forming a pincushion type image forming region in the pixel region, it becomes possible to cancel the bending distortion. When there is no instruction to correct the curvature distortion from the control unit 20, the image correction unit 33 outputs the image information input from the OSD processing unit 32 to the liquid crystal drive unit 14 as it is. In this case, the entire pixel area becomes an image forming area, and an image (input image) is formed in the entire pixel area.

  When the liquid crystal drive unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the image correction unit 33, the liquid crystal light valves 12R, 12G, and 12B modulate the image light according to the image information. Image light is projected from the projection lens 13.

Next, bow correction (curvature distortion correction) of the projector 1 will be described.
As described above, the projector 1 according to the present embodiment can perform the curvature distortion correction process by the image correction unit 33. Specifically, when a menu key provided in the operation accepting unit 22 or the remote controller 24 is pressed, a menu image is displayed. When the item of bow correction (curvature distortion correction) is selected in the menu image, a control point area selection image for selecting an area for correcting the curvature distortion is displayed. When a desired control point area is selected in the control point area selection image, a curved distortion correction image corresponding to the control point area is displayed. In this curved distortion corrected image, the user can correct the curved distortion by moving the control point by operating the direction key. In this embodiment, the control points are the four vertices arranged at the four corners of the contour of the input image and the center on the four sides of the contour.

FIG. 2 is an explanatory diagram of a menu image of the projector 1 according to the present embodiment.
As shown in FIG. 2, a plurality of items (adjustment items) are arranged vertically in the menu image M1. In the example shown in FIG. 2, “bow correction” for correcting curvature distortion, “color mode” for setting an image quality adjustment mode (color mode), and “brightness” for adjusting image brightness. ", Four items of" lamp brightness "for adjusting the brightness of the light source lamp 11a are displayed. Also, one of the four adjustment items (“bow correction” in FIG. 2) has a background color different from the other items, indicating that this item is selected. The menu image M1 is displayed by the OSD processing unit 32.

  In the state where the menu image M1 is displayed, the user can select a desired adjustment item by operating the up and down direction keys. Then, by operating the enter key with the desired adjustment item selected, the selection of the adjustment item can be confirmed and a setting image related to the adjustment item can be displayed. Further, the user can end the display of the menu image M1 by operating the ESC key.

FIG. 3 is a diagram showing a projected image on which a control point area selection image for bow correction is displayed.
As shown in FIG. 3, a control point area selection image N1 is superimposed on the projection image A1 as an OSD image. A character string “[bow correction]” is displayed at the top of the control point area selection image N1. Below that, eight control point area images CA of the input image are displayed. The eight control point area images CA are four control point area images CA (CA1, CA3, CA6, CA8) corresponding to control points CP (CP1, CP3, CP6, CP8) at four corners (corners) of the input image. And four control point area images CA (CA2, CA4, CA5, CA7) corresponding to the central control points CP (CP2, CP4, CP5, CP7) of the four sides of the input image.

  One of the control point area images CA1 to CA8 (control point area image CA1 in the example of FIG. 3) has a different color scheme from the other seven, and the control point area image CA is selected. It shows that there is. In FIG. 3, eight control points CP are displayed as “points”, but are not displayed in an actual projection image.

  A character string “Please select an area” for prompting selection of the control point area image CA is displayed below the control point area selection image N1. Furthermore, the control point area image (CA1 to CA8) to be selected can be changed by operating the up / down direction key and the left / right direction key, the control point area image CA can be determined by operating the enter key, and the ESC key can be selected. It is displayed that the operation can end the display of the control point area selection image N1. The user can select a desired control point area image CA by operating the direction key. When the user operates the enter key after selecting the control point area image CA, the control point area image CA is selected. Determine. When the selection of the control point area image CA is confirmed, an arcuate correction adjustment image corresponding to the control point area image CA is displayed. The control point CP corresponding to the selected control point area image CA at this time corresponds to the selected control point. In the arcuate correction adjustment image, the position of the control point CP corresponding to the selected control point area image CA can be adjusted.

4A and 4B are diagrams illustrating a projected image on which an arcuate correction adjustment image is displayed. FIG. 4A is a diagram illustrating a projected image including a corner adjustment image, and FIG. 4B includes a side adjustment image. It is a figure which shows a projection image.
As shown in FIG. 4A, an arcuate correction adjustment image D (D1) is superimposed and displayed as an OSD display on the projection image A2. A character string “[bow correction]” is displayed at the top of the bow correction adjustment image D1. Below that, the control point area image CA1 is enlarged and displayed as an enlarged image Z1.

  A triangular direction mark T indicating the up / down / left / right direction is added to the enlarged image Z1, and the corner (that is, the control point CP1) shown in the control point area image CA1 is moved up / down / left / right (position adjustment). ) Is possible. Further, a message “Please make adjustments” is displayed at the bottom of the bow correction adjustment image D1, prompting the user to adjust the position of the control point CP1. In a state where the bow correction adjustment image D1 is displayed, the user can adjust the position of the control point CP1 (corner portion) by operating the direction key. When the position of the control point CP1 is changed, the shape of the projection image A2 is corrected to a bow shape (curvature distortion correction) based on the position of the control point CP1.

  At the bottom of the bow correction adjustment image D1, the bow correction can be adjusted by operating the up and down direction keys and the left and right direction keys, and the adjustment is completed by operating the enter key or the ESC key to select the control point area. Returning to the image N1 is displayed. Note that the position adjustment range of the control point CP1 by the direction key is limited to the pixel areas of the liquid crystal light valves 12R, 12G, and 12B.

  As shown in FIG. 4B, an arcuate correction adjustment image D (D2) is superimposed and displayed as an OSD display on the projection image A3. A character string “[bow correction]” is displayed at the top of the bow correction adjustment image D2. Below that, the control point area image CA2 is enlarged and displayed as an enlarged image Z2.

  A triangular direction mark T indicating the up and down direction is added to the enlarged image Z2, and the center of the side (that is, the control point CP2) shown in the control point area image CA2 is moved up and down (position adjustment). ) Is possible. Further, a message “Please make adjustments” is displayed at the bottom of the bow correction adjustment image D2, prompting the user to adjust the position of the side control point CP2. In a state where the bow correction adjustment image D2 is displayed, the user can adjust the position of the control point CP2 (the center of the side) by operating the direction key. When the position of the control point CP2 is changed, the shape of the projection image A3 is corrected to a bow shape (curvature distortion correction) based on the position of the control point CP2.

  At the bottom of the bow correction adjustment image D2, the bow correction can be adjusted by operating the up and down direction keys, and the adjustment is completed by returning to the control point area selection image N1 by operating the enter key or the ESC key. Is displayed. The position adjustment range of the control point CP2 by the direction key is within the pixel area of the liquid crystal light valves 12R, 12G, and 12B. In this embodiment, the center of the edge of the input image and the center of the pixel area, that is, the image area. On the line connecting the center.

  Here, the bow correction adjustment images D1 and D2 have been described, but the bow correction adjustment image D corresponding to the control point area images CA3 to CA8 is substantially the same, and the positions of the control points CP3 to CP8 can be adjusted. Similar to the control point CP2, the position adjustment range of the control points CP4, CP5, CP7 is within the pixel area of the liquid crystal light valves 12R, 12G, 12B, and the center of the edge of the input image and the center of the pixel area On the line segment connecting

Next, processing when the projector 1 performs bow correction (curvature distortion correction) will be described.
FIG. 5 is a flowchart of processing when the projector 1 according to the present embodiment performs bow correction.

  When the bow correction is selected in the menu image M1, the control unit 20 instructs the OSD processing unit 32 to display the control point area selection image N1 (step S101). Next, the control unit 20 determines whether or not the control point area image CA (that is, the control point CP) has been selected (step S102). The control unit 20 and the OSD processing unit 32 at this time correspond to a control point selection unit. If the control point area image CA has been selected (step S102: YES), the control unit 20 issues an instruction to the OSD processing unit 32 to select the arcuate correction adjustment image D corresponding to the selected control point area image CA. It is displayed (step S103).

  The control unit 20 determines whether or not an adjustment operation using a direction key has been performed (step S104). If the adjustment operation using the direction key has been performed (step S104: YES), the control unit 20 instructs the image correction unit 33 to form an image forming region based on the adjusted position of the control point CP. (Step S105). The control unit 20 that moves and adjusts the control point CP corresponds to the control point moving unit. At this time, the image correcting unit 33 forms an image forming region, that is, an image outline so as to connect the adjusted control point CP and the adjacent control point CP with an arcuate curve.

  The image correction unit 33 corrects the image information so as to fit in the image forming area (step S106). The image correction unit 33 that corrects the image information corresponds to the image correction unit. Then, the process returns to step S103.

  If the adjustment operation using the direction key is not performed (step S104: NO), the control unit 20 determines whether or not the ESC key is pressed (step S107). If the ESC key has not been pressed, the process returns to step S103. If the ESC key is pressed (step S107: YES), the process returns to step S101.

  If the control point area is not selected (step S102: NO), the control unit 20 determines whether or not the ESC key is pressed (step S108). If the ESC key has not been pressed (step S108: NO), the process returns to step S101. If the ESC key is pressed (step S108: YES), the control unit 20 instructs the OSD processing unit 32 to end the display of the control point area selection image N1 (step S109). Then, the bow correction process ends.

Next, an image on which the bow correction as described above is performed will be described.
FIG. 6 is a plan view showing a pixel region in which the bow correction is performed.
In FIG. 6, the control point area images CA2 and CA7 (that is, the control points CP2 and CP7) are bow-corrected, an image forming region G distorted in a pincushion shape is formed in the pixel region P, and the image information is corrected. Has been. Here, the areas S1 and S2 outside the image forming area G in the pixel area P are black (a state that hardly transmits light). When such bow correction is performed, the projector 1 emits an image distorted into a pincushion mold that has been corrected to fit within the image forming region G. For example, when the projection surface S is concavely curved, if the user performs bow correction (curvature distortion correction) while projecting an image on the concave projection surface S, the projected image distorted in a pincushion shape. Thus, the distortion on the projection surface S can be corrected to a rectangular shape.

  Although not shown, it is also possible to form an image forming region G distorted in a barrel shape in the pixel region P. Specifically, the barrel-shaped image forming region G can be formed by correcting the control point area images CA1, CA3, CA6, and CA8 in a bow shape in the inner direction of the pixel region P. Then, the image information is corrected so as to fit in the barrel-shaped image forming region G. When the projection surface S is curved in a convex shape, the curved distortion on the projection surface S can be corrected by projecting a barrel-shaped image from the projector 1.

According to the embodiment described above, the following effects can be obtained.
(1) The projector 1 displays the control point area selection image N1, and allows the user to select the control point area image CA (that is, the control point CP). The projector 1 displays an arcuate correction adjustment image D corresponding to the selected control point area image CA. The user can adjust the position of the control point CP within the pixel region P. Then, the image correction unit 33 of the projector 1 forms the image forming region G so as to pass through the adjusted position of the control point CP. Further, the image correction unit 33 corrects the image information so as to be within the image forming area G. Thus, the user can correct the shape of the projected image by moving the control point CP with the direction keys provided on the operation receiving unit 22 and the remote controller 24 while visually recognizing the projected image. That is, the user can easily correct the shape of the projected image without prior knowledge. Further, since the geometric shape correction of the projected image can be performed by the projector 1 alone, convenience is improved.

  (2) The image correcting unit 33 of the projector 1 forms an image forming region G in which the adjusted control point CP and the adjacent control point CP are connected by an arcuate curve. As a result, the image forming region G has a shape including a curve, and the image information corrected by the image correcting unit 33 represents a curved image. In this way, by projecting a curved image, it is possible to cancel the curved distortion on the projection surface S when the projection surface S is a curved surface.

  (3) In the projector 1, one control point CP is arranged on each of four vertices (corner portions) and four sides of the contour of the image based on the image information. As a result, the image forming region G can be formed at eight control points (CP1 to CP8), and simple and effective operability can be realized.

  (4) In the projector 1, the default position of the control points CP (CP2, CP4, CP5, CP7) on the four sides is the center of each side of the contour of the image. As a result, the user can adjust the control point CP with the direction keys, that is, form the image forming region G in a well-balanced manner.

  (5) In the projector 1, the control points CP (CP2, CP4, CP5, CP7) on the four sides can be adjusted on a line segment connecting the default position and the center of the pixel region. As a result, software processing such as image formation region G formation processing and image information correction processing can be simplified.

  In addition, it is not limited to embodiment mentioned above, It is possible to implement by adding various change, improvement, etc. A modification will be described below.

  (Modification 1) In the above embodiment, the control points CP (CP1 to CP8) are 8 points, but are not limited to 8 points. For example, when the number is more than 8, more fine correction can be performed.

  (Modification 2) In the above embodiment, the default position of the control point CP (CP2, CP4, CP5, CP7) on the edge of the image contour based on the image information is the center of each edge, but is limited to the center. It is not a thing.

  (Modification 3) In the above embodiment, the adjustment direction of the control points CP2, CP4, CP5, and CP7 on the side is on the line segment connecting the center on the side and the center position of the pixel region. Not what you want. It may be adjustable in an oblique direction.

  (Modification 4) In the above embodiment, the light source device 11 includes the discharge type light source lamp 11a. However, the light source device 11 includes a solid light source such as an LED (Light Emitting Diode) light source and a laser, and other light sources. It can also be used.

  (Modification 5) In the above-described embodiment, the projector 1 uses the transmissive liquid crystal light valves 12R, 12G, and 12B as the light modulator, but the reflective light modulator such as a reflective liquid crystal light valve. It is also possible to use. In addition, it is possible to use a micromirror array device that modulates light emitted from a light source by controlling the emission direction of incident light for each micromirror as a pixel.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 10 ... Image projection part, 11 ... Light source device, 11a ... Light source lamp, 11b ... Reflector, 12R, 12G, 12B ... Liquid crystal light valve, 13 ... Projection lens, 14 ... Liquid crystal drive part, 20 ... Control part, DESCRIPTION OF SYMBOLS 21 ... Light source control part, 22 ... Operation reception part, 23 ... Operation signal receiving part, 24 ... Remote control, 30 ... Image information input part, 31 ... Image processing part, 32 ... OSD processing part, 33 ... Image correction part.

Claims (6)

A projector that projects an image based on image information,
An operation reception unit for receiving input operations;
Control points that select each vertex of the contour of the image based on the image information and predetermined points arranged on each side of the contour as control points, and select one of the plurality of control points as a selection control point A selection section;
A control point moving unit that moves the selected control point selected by the control point selecting unit within the image based on the input operation;
An image correcting unit that forms an outline of the image so as to pass through the selected control point moved by the control point moving unit, and corrects the image information so as to be within the formed outline;
A projector comprising: The projector according to claim 1,
The image correction unit forms a contour of the image so as to connect the selection control point and the adjacent control point with a curve. The projector according to claim 1,
The projector according to claim 1, wherein the predetermined point is arranged at least one point on each side of the outline. The projector according to claim 3,
The default position of the predetermined point is arranged at the center of each side of the contour. The projector according to claim 4,
The projector is characterized in that the predetermined point can be moved on a line segment connecting the default position and the center position of the image based on the input operation. A projector control method that includes an operation receiving unit that receives an input operation and projects an image based on image information,
Control for causing each vertex of the contour of the image based on the image information and predetermined points arranged on each side of the contour to be control points, and selecting one of the plurality of control points as a selection control point A point selection step;
A control point moving step of moving the selected control point selected in the control point selecting step in the image based on an input operation;
An image correcting step of forming an outline of the image so as to pass through the selected control point moved by the control point moving step, and correcting the image information so as to fit in the formed outline;
A projector control method comprising:

Images