JP2006227441A - Projector and image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the burden of a drawing processing when a plurality of display objects included in an image overlap and one of overlapping display objects moves. <P>SOLUTION: When the projector accepts an instruction to move the one display object in the case that the plurality of the display objects are included in the image to be projected, the projector judges whether each display object overlaps or not. When the projector judges that the display objects overlap, the image where the plotting of the overlapping point in the display object to be moved is omitted is drawn and is subjected to a projection processing. While the instruction to move the display objects is continuously accepted, the projector continues the drawing processing which omits the plotting of the overlapping point. When the acceptance of the moving instruction stops, the projector performs the drawing processing to plot the omitted part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, when a plurality of display objects are included in a displayed image, if each display object overlaps due to movement of the display object, drawing of the overlapping range of one overlapping display object is omitted, thereby displaying the image. The present invention relates to a projector and an image display method capable of improving the efficiency of processing related to the above and displaying images smoothly.

  Conventionally, there is a projection type image display device (projector) that displays an image on a projection object such as a screen, and there are a front projection type device and a rear projection type device depending on the projection direction.

  Some projectors allow a user to draw and display various objects such as lines, squares, and circles on a projection object using an attached remote control device. In addition, each projector can display various menus as OSD (On Screen Display) in order to perform necessary adjustments and settings, and in particular, a front projection type projector requires projection adjustment according to the installation location. Therefore, an image such as trapezoidal distortion correction is displayed on the OSD at the preparation stage for starting projection.

  FIG. 19 shows a state in which light representing an image for projection adjustment is projected from the projection lens 1 a onto the screen 3 by the front projection type projector 1 and the image G is displayed on the screen 3. The displayed image G corresponds to the correction of the trapezoidal distortion, and the user can visually recognize the state of the trapezoidal distortion correction formed by a rectangular band frame W (indicated by hatching) representing the display range and a rectangular thin line. A line frame portion K for the display is included as a display object.

As shown in FIG. 20A, the line frame portion K has a total of four vertices K1 to K4, and is composed of an upper side portion U, a right side portion R, a lower side portion B, and a left side portion L. Specifically, it is located within the range surrounded by the belt frame portion W. An arrow-shaped cursor C is arranged at any one of the vertices K1 to K4 of the line frame portion K, and a remote control device (hereinafter referred to as a remote control device) 2 of the projector 1 shown in FIG. By appropriately operating, the location (vertex) where the cursor C is placed can be changed sequentially. Further, the vertex at which the cursor C is arranged is moved by a predetermined operation of the remote control device 2, and by this movement, the square shape of the line frame portion K is adjusted, and the trapezoidal distortion correction with respect to the projection direction is performed. Done. The correction of the image position to be projected is disclosed in the following Patent Document 1, and the trapezoidal distortion (keystone distortion) correction is disclosed in the following Patent Document 2.
JP 2001-69433 A JP 2000-330507 A

  In the state shown in FIG. 20A, when the cursor C is moved in the right direction (direction indicated by the arrow) in the figure, the vertex K2 corresponding to the cursor C is also moved in the right direction and follows the movement. The dimensions and inclination of the upper side U and the right side R are changed, and the square of the line frame part K is deformed so as to extend in the right direction. Therefore, during the movement of the cursor C (vertex K2), the dimensions and inclinations of the upper side U and the right side R related to the movement are changed at any time, so that the projector 1 is located at a location related to the upper side U and the right side R. Repeat the process to redraw. When the projector 1 performs such a drawing process, the user operating the remote control device 2 can check the situation in which the line frame portion K displayed on the screen 3 is deformed at any time according to the operation of the remote control device 2. It is possible to correct keystone distortion appropriately.

  On the other hand, as shown in FIG. 20B, depending on the user's operation, the vertex K <b> 2 may move to a location where it overlaps with the belt frame portion W. In this way, when the line frame part K overlaps with the band frame part W and the vertex K2 located at the overlapping part is moved, the drawing process of the overlapping part is much more difficult than the drawing process when not overlapping. It will be burdensome.

  FIGS. 21A to 21G show the contents of one cycle of drawing processing when the vertex K2 is moved in the overlapping portion surrounded by the broken line in FIG. 20B. First, FIG. 21A shows a state in which the vicinity of the vertex K2 of the line frame portion K overlaps with the belt frame portion W, and the icon of the cursor C is placed (pasted) on the vertex K2. Yes. In this state, the state of the range H in which the cursor C is arranged is assumed to be copied as an arrangement source diagram in a predetermined memory area h of the projector 1 and is illustrated in FIGS. 21 (a) to 21 (g). The contents of the memory area h indicate the contents of the figure stored at that time. In addition, the broken lines indicating the range H in FIGS. 21A and 21B are explicitly represented and are not actually displayed.

  Next, as shown in FIG. 21 (b), the arrangement source map stored in the memory area h is pasted to the range H in which the cursor C is arranged to delete the cursor C, and then shown in FIG. 21 (c). In this way, the upper side U and the right side R are drawn with the background color of the image G (for example, a transparent color or white). Note that, due to this drawing, a part of the upper side portion U and the right side portion R drawn in the background color overlap each other in the band frame portion W to generate a missing portion Wa. In order to fill this missing portion Wa, the upper side showing a state in which the band frame portion W is redrawn as shown in FIG. 21 (d), and then the dimensions and inclinations are changed as shown in FIG. 21 (e). The part U and the right side part R are drawn.

  Then, as shown in FIG. 21 (f), the state of the range H in which the cursor C is arranged is copied to the memory area h, and finally the icon of the cursor C is pasted (see FIG. 21 (g)). Therefore, while the vertex K2 located at the overlapping portion is moving, the projector 1 sequentially repeats the drawing process in which one cycle shown in FIGS. 21A to 21F is composed of seven steps. There is a problem that the processing load of the projector 1 increases.

  In addition, if the processing load becomes excessive, the drawing speed will also decrease, causing a situation in which the displayed image will be in a frame-by-frame state, a situation in which overlapping parts will be displayed in a blinking manner, etc. There is a problem. In particular, when the drawing speed is reduced, there is a time lag between the operation of the remote controller 2 performed by the user for correcting the trapezoidal distortion and the image content actually displayed, and the operational feeling for the trapezoidal distortion correction is deteriorated. There is a problem to do.

  FIGS. 22A to 22H show the contents of one cycle of the conventional drawing process for an overlapping form different from the above. In this case, the line frame portion K overlaps with the belt frame portion W at the upper left vertex K1, the cursor C is positioned at the upper right vertex K2, and the upper right vertex K2 is the movement target. Since the size, inclination, and the like of the upper side U and the right side R change with the movement, the drawing process for overlapping portions becomes complicated.

  Specifically, first, FIG. 22A shows the initial state, and at this time, the contents of the range related to the arrangement of the cursor C are stored in the memory area h described in FIG. Next, as shown in FIG. 22B, the contents stored in the memory area h are pasted into the area where the cursor C is arranged, the cursor C is deleted, and the upper side portion U as shown in FIG. Then, after drawing the right side portion R with the background color of the image G, the strip frame portion W is redrawn as shown in FIG. 22D to eliminate the missing portion Wa generated in FIG. Note that, by redrawing the belt frame portion W, a part of the left side portion L on the vertex K1 side (the overlapping portion with the belt frame portion W) is deleted.

  Then, the left side L is redrawn as shown in FIG. 22 (e) to restore the erased portion, and then the upper side U and the right side showing the moved state as shown in FIG. 22 (f). R is drawn to complete the line frame portion K. In this state, as shown in FIG. 22 (g), the contents of the range H in which the cursor C relating to the upper right vertex K2 is arranged are stored in the memory area h, and finally the upper right vertex K2 as shown in FIG. 22 (h). A cursor C icon is pasted in the vicinity. As described above, in the overlap state described above, the projector 1 needs to repeat the drawing process in which one cycle shown in FIGS. 22A to 22H is eight steps, and the processing load on the projector 1 is increased.

  Further, FIGS. 23A to 23I show the contents of one cycle of the conventional drawing process for the overlapping form different from the above two examples. In this example, a line is drawn at the upper left vertex K1 and the upper right vertex K2. The frame portion K overlaps with the belt frame portion W, and the projector 1 performs the drawing process accompanying the movement of the upper right vertex K2 where the cursor C is located. In FIG. 23A showing the initial state, the contents of the range where the cursor C is arranged are stored in the memory area h, and then the contents stored in the memory area h as shown in FIG. After pasting and deleting the cursor C, the upper side U and the right side R are drawn with the background color of the image G as shown in FIG. In this example, since there are two overlapping portions, two missing portions Wa1 and Wa2 also occur in the belt frame portion W.

  From this state, as shown in FIG. 23 (d), the upper horizontal portion of the band frame portion W is redrawn to erase the upper defective portion Wa1, and the left side portion L as shown in FIG. Redraw to restore the erased top of the left side L. Further, as shown in FIG. 23 (f), the right side vertical portion of the band frame portion W is redrawn to erase the right side missing portion Wa2, and the upper side portion showing the state of movement as shown in FIG. 23 (g). U and the right side portion R are drawn to complete the line frame portion K.

  In this state, as shown in FIG. 23 (h), the contents of the range H in which the cursor C relating to the upper right vertex K2 is arranged are stored in the memory area h, and finally the upper right vertex K2 as shown in FIG. 23 (i). A cursor C icon is pasted in the vicinity. In such a state where two places overlap, the projector 1 needs to repeat the drawing process of nine steps in one cycle shown in FIGS. 23A to 23I, and the processing load on the projector 1 further increases.

  Furthermore, FIGS. 24A to 24I show the contents of one cycle of the conventional drawing process for the overlapping form different from the above three examples, and in this example, the vertices K1 and K2 on the left and right are connected. The upper horizontal portion U overlaps the belt frame portion W with the upper horizontal portion of the line frame portion K.

  In FIG. 24A showing the initial state, the contents of the range related to the arrangement of the cursor C are stored in the memory area h, and then the contents stored in the memory area h as shown in FIG. Is pasted into the arrangement range of the cursor C and the cursor C is deleted, and then the upper side U and the right side R are drawn with the background color of the image G as shown in FIG. In this example, since the entire upper side portion U overlaps, a line segment-like missing portion Wa is generated in the upper horizontal portion of the belt frame portion W.

  From this state, as shown in FIG. 24 (d), the horizontal portion on the upper side of the band frame portion W is redrawn to erase the missing portion Wa, and the left side portion L is redrawn as shown in FIG. 24 (e). Thus, the erased upper part of the left side L is restored. Further, as shown in FIG. 24 (f), the right side portion R showing the moved state is drawn, and as shown in FIG. 24 (g), the upper side portion U showing the moved state is drawn to draw the line frame portion K. Finalize.

  In this state, as shown in FIG. 24 (h), the contents of the range H in which the cursor C relating to the upper right vertex K2 is arranged are stored in the memory area h, and finally the upper right vertex K2 as shown in FIG. 24 (i). A cursor C icon is pasted in the vicinity. In this way, in a state where the upper side U overlaps as a whole, the projector 1 needs to repeat the drawing process of nine steps in one cycle shown in FIGS. 24A to 24I, and the processing load on the projector 1 is reduced. Increases further.

  Note that the problem of increasing the burden of the above-described drawing process is not only the OSD display at the projection preparation stage, but also when a plurality of display objects are duplicated even when a free drawing process and various menu images are displayed using the remote control device. However, the same occurs when one overlapping display object moves.

  The present invention has been made in view of such problems, and in order to reduce the burden of the drawing process for the various overlapping forms described above, the display of the moving part of the overlapping portion is omitted during the movement of the display target. An object of the present invention is to provide a projector and an image display method capable of realizing smooth image display.

  In order to solve the above-described problem, a projector according to the present invention is a movement instruction receiving unit that receives an instruction to move a display object when the image representing the image including the plurality of display objects is projected and the image is displayed on the projection target. And a projector including an image creating unit that creates an image in which a display object is moved according to the instruction received by the movement instruction receiving unit, and whether a plurality of display objects overlap based on the instruction received by the movement instruction receiving unit And a duplication judgment unit that judges whether or not the image creation unit creates an image in which drawing of overlapping portions of the display object to be moved is omitted when the duplication judgment unit judges that a plurality of display objects are duplicated. Means are provided.

  Further, the projector according to the present invention includes an end position specifying unit that specifies an end position of a display object that is a target of an instruction received by the movement instruction receiving unit, and an outline specifying that specifies an outline of another display object. Whether the plurality of display objects overlap based on a positional relationship between the edge position specified by the edge position specifying means and the contour line specified by the contour line specifying means. Means is provided for determining whether or not.

  The projector according to the present invention further includes an intersection specifying unit that specifies an intersection between a display object that is an instruction to be received by the movement instruction receiving unit and an outline specified by the outline specifying unit, and the image creating unit The means is characterized in that drawing of overlapping portions is omitted at the intersection specified by the intersection specifying means.

  Furthermore, the projector according to the present invention includes an image creating unit that creates an image including a rectangular strip representing a display range and a line frame representing a trapezoidal distortion correction rectangle, and the frame image creating unit creates the image. Projection means for projecting light representing the image to the projection body, and movement instruction reception means for receiving an instruction to move the vertex of the line frame when the image is displayed on the projection body, In the projector configured to create an image in which the vertex of the line frame unit is moved according to the instruction received by the movement instruction receiving unit, the line frame unit is based on the instruction received by the movement instruction receiving unit. When it is determined by the overlap determination unit that the line frame part overlaps the band frame part, the image creating unit determines whether the line frame part overlaps the band frame part. Part Characterized in that it comprises means for creating an image is omitted drawing double points.

  In the projector according to the invention, the movement instruction receiving unit can continuously receive the instruction, and the determination to determine whether or not the continuous instruction reception by the movement instruction receiving unit has been interrupted. And the image creating means comprises means for continuing to create an image in which drawing of overlapping portions is omitted when it is determined by the determining means that acceptance of continuous instructions has not been interrupted. To do.

  Furthermore, the projector according to the present invention includes means for creating an image in which the duplicated portion that has been omitted is drawn when the image creating means determines that the acceptance of continuous instructions has been stopped by the determining means. It is characterized by.

  The image display method according to the present invention projects a light representing an image including a plurality of display objects by a projector to display the image on the projection target, and accepts a movement instruction to move the display object while displaying the image. In the image display method of the projector that creates an image in which the display object is moved in accordance with the received movement instruction and projects the light representing the image to display on the projection object, the projector responds to the received movement instruction. Based on this, it is determined whether or not a plurality of display objects overlap. When it is determined that a plurality of display objects overlap, an image in which drawing of overlapping portions of the display object to be moved is omitted is created.

  Furthermore, in the image display method according to the present invention, the projector can continuously accept a movement instruction, determines whether or not the continuous movement instruction has been accepted, When it is determined that the reception has been stopped, an image in which the omitted overlapping portion is drawn is created.

  In the present invention, it is determined whether or not a plurality of display objects overlap. When it is determined that the display objects overlap, drawing of overlapping portions of the display object to be moved is omitted. Even if the portion related to is redrawn at any time, a defective portion does not occur in the overlapping portion (see the defective portion Wa shown in FIG. 21C, etc.). This eliminates the need for redrawing processing to fill in the missing portion, thereby reducing the number of steps in one cycle necessary for drawing processing as compared with the prior art and reducing the burden of drawing processing. In this way, the present invention eliminates the need for redrawing processing to fill in the defective portion, and therefore, the greater the number of overlapping portions, the greater the ratio that the processing load can be reduced compared to the conventional drawing processing.

Further, according to the present invention, since the overlapping of each display object is determined based on the positional relationship between the end position of the display object to be moved and the contour line of another display object, it is reliable and easy. Duplicate judgment can be made.
Furthermore, in the present invention, since the intersection of the display object to be moved and the contour line of the other display object is specified, the specified intersection can be used as a guideline for determining the drawing range of the display object, By drawing the display object only in the non-overlapping range, it is possible to easily perform drawing without causing a missing part in the overlapping part.

  In the present invention, when the image including the band frame portion and the line frame portion relating to the projection preparation of the projector is displayed and the trapezoidal distortion correction is performed, the vertex of the line frame portion is moved to move one of the line frame portions. When the part overlaps the band frame part, the drawing of the overlapping part of the line frame part is omitted, so the missing part does not occur in the band frame part, and the redrawing process for filling the missing part is not necessary for the drawing process The number of such processes can be reduced. As a result, it is possible to increase the drawing speed of the image when performing the trapezoidal distortion correction, and the contents of the displayed image smoothly follow the user's operation for the keystone distortion correction, and the keystone distortion correction is performed. The operational feeling at the time can be improved.

  Further, in the present invention, it is determined whether or not an instruction related to the movement of the display object is continuously received, and when the continuous instruction reception is not interrupted, the image creation in which the drawing of the overlapping portion is omitted Therefore, the burden of the drawing process can be continuously reduced even while the display object is moving, and a smooth image display can be performed.

  Furthermore, in the present invention, when the continuous instruction relating to the movement of the display object is stopped, the omitted overlapping portion is drawn, so when the movement of the display object is stopped, the omission is omitted. No complete image will be obtained. Therefore, it is possible to display a complete image without omission of drawing when the display object does not move after reducing the drawing processing load during the movement of the display object, and reducing the drawing processing load and the image display level. Can be balanced.

  In the present invention, when the display object to be moved overlaps with another display object, the drawing of the overlapping part of the display object to be moved is omitted, so that a missing part in the drawing process during movement does not occur. The number of steps in one cycle of the drawing process can be reduced as compared with the prior art.

Further, in the present invention, since the overlapping of each display object is determined based on the positional relationship between the end position of the display object to be moved and the contour line of the other display object, the determination on the overlap Can be reliably and easily performed.
Furthermore, in the present invention, the intersection between the display object to be moved and the contour line of the other display object is specified, and the display object is drawn at the specified intersection, so that the overlapping portion is missing. Display objects can be drawn so that no part is generated, and this can contribute to reducing the burden of drawing processing.

  In the present invention, when the trapezoidal distortion correction is performed in the projection preparation stage, when the line frame part overlaps the band frame part due to the movement of the vertex of the line frame part, the drawing of the overlapping part of the line frame part is omitted. As a result, the number of steps related to the drawing process can be reduced, and the operational feeling can be improved when the trapezoidal distortion correction is performed by smoothly following the display contents to the user's operation.

Further, in the present invention, if the continuous instruction relating to the movement of the display object is not interrupted, the image creation without drawing the overlapping portion is continued. The burden can be reduced and smooth image display can be performed.
Further, in the present invention, when the continuous instruction relating to the movement of the display object is stopped, the omitted overlapping portion is drawn, so that the display object is omitted when the movement of the display object is stopped. A complete image can be displayed, and the reduction in the drawing processing burden and the level of display contents can be balanced.

  FIG. 1 is a block diagram showing an internal configuration of a projector 10 according to an embodiment of the present invention, and shows main parts related to the present invention. The projector 10 of this embodiment is characterized in that an image for trapezoidal distortion correction can be efficiently created at the stage of projection preparation.

  The projector 10 includes an external connection unit 15 and an image conversion unit 16 as a part that performs processing on a projection image received from an external device, and a projection image pattern switching unit 17 and a projection device unit as parts that perform processing related to projection. 18 and a projection lens 19, and includes a system control unit 11 as a part for performing general control processing and control processing for drawing an image to be displayed. In addition, the projector 10 is provided with an operation unit 22 as a part for receiving an operation from a user and is provided with a remote control device 20, and a remote control light receiving unit 21 for the remote control device 20 is provided on the main body side.

  The external connection unit 15 is connected to an external device such as a personal computer that outputs an image for projection, receives an image output from the external device, and transmits the image to the image conversion unit 16. The image conversion unit 16 performs a required conversion process such as A / D conversion based on the control of the system control unit 11, and transmits the image subjected to the conversion process to the projection device unit 18.

  Further, the projection image pattern switching unit 17 performs a process of switching various OSD images to be displayed in the stage of projection preparation based on the control of the system control unit 11 and transmitting the switched image to the projection device unit 18. The projection image pattern switching unit 17 appropriately generates a keystone distortion correction image, a color correction image, a focusing image, and the like as projection preparation images, and switches each image according to the stage of projection preparation. I do.

  The projection device unit 18 includes a spatial light modulation element that optically modulates an image to be projected (image signal), and for various images (image signals) transmitted from the image conversion unit 16 and the projection image pattern switching unit 17. Light modulation processing is performed to generate modulated light representing an image, and the generated modulated light is applied to the external screen 30 through the projection lens 19. As the spatial light modulator, a liquid crystal panel, DMD (Digital Micromirror Device: registered trademark), or the like can be applied.

  The operation unit 22 includes a plurality of buttons, switches, and the like, receives user operation instructions with these buttons and switches, and transmits the received instructions (instruction signals) to the system control unit 11. The remote control light receiving unit 21 receives infrared light including an instruction signal from the remote control device 20 and transmits the received instruction signal to the system control unit 11. The remote control device 20 has a plurality of keys and buttons including up / down / left / right keys 20a to 20d and a determination key 20e. The remote control device 20 receives instructions from the user with the keys and buttons, and an instruction signal corresponding to the received operation content. To the remote control light receiving unit 21.

  The operation unit 22 and the remote control device 20 described above can accept an image switching instruction at the projection preparation stage, an adjustment instruction at each projection stage, and the like, and in particular, the movement target is continuously applied to trapezoidal distortion correction. An instruction to move to can be received. For example, in the remote control device 20, if any one of the keys 20a to 20d is continuously pressed by the user, the remote control device 20 can continuously receive the movement instruction, and further receives the continuous start instruction in this way. When the key that has been kept pressed is released during the operation, the received instruction is interrupted.

  The system control unit 11 includes a CPU circuit that performs various controls, and temporarily stores a drawing memory 12 that stores data related to an image, a ROM 13 that stores a predetermined program in advance, and data related to processing. Has a RAM 14 for storing. The drawing memory 12 stores OSD image 25, cursor image 26 data, and the like as various data relating to drawing.

  The data of the OSD image 25 corresponds to, for example, coordinates and mathematical formula data for creating a trapezoidal distortion correction image G as shown in FIG. 2, and a display range that is two display objects of the image G. And data for drawing a line frame portion K representing a quadrangle for correcting trapezoidal distortion are included. As shown in FIG. 2, the system control unit 11 stores data in which a rectangular line frame part K is located inside a rectangular band frame part W as shown in FIG. 2, and projects such data. The image G is generated by being transmitted to the image pattern switching unit 17, and the modulated light representing the image G is projected from the projection device unit 18 and the projection lens 19 to display the image G on the screen 30. In FIG. 2, the horizontal direction in FIG. 2 is defined as the X axis, the vertical direction is the Y axis, the right direction is the + direction of the X axis, and the downward direction is the + direction of the Y axis.

  The details of the data content for creating the image G in FIG. 2 will be explained. As the data for the band frame portion W, there is mathematical formula data for creating the contour lines on the outer peripheral side and the inner peripheral side of the band frame portion W. Then, there is “y = A1” as mathematical data of the outer peripheral upper horizontal line W1, and hereinafter, “y = A2” of the inner peripheral upper horizontal line W2, “x = B4” of the outer peripheral right vertical line W3, and inner peripheral right vertical line W4. “X = B3”, “y = A4” of the outer periphery lower horizontal line W5, “y = A3” of the inner periphery lower horizontal line W6, “x = B1” of the outer periphery left vertical line W7, and inner periphery left vertical line W8 “X = B2” exists. In addition, regarding each mathematical formula data, A1 to A4 and B1 to B4 indicate predetermined coordinate values, and a relationship of A1 <A2 <A3 <A4 and B1 <B2 <B3 <B4 is established.

  Further, as the data for the line frame portion K, there is coordinate data indicating the positions of the vertices K1 to K4 at the four corners, the upper left vertex K1 is indicated by (X1, Y1), and the upper right vertex K2 is hereinafter referred to as (X2 Y2), the lower right vertex K3 is indicated by (X3, Y3), and the lower left vertex K4 is indicated by (X4, Y4). Further, the line frame portion K is composed of a total of four side portions U, R, B, and L, and the same coordinate data is given to both end portions of each side portion U, R, B, and L.

  In addition, as both ends of each side portion U, R, B, L, the upper end portion U has a left end portion U1, a right end portion U2, and the left end portion U1 coincides with the upper left vertex K1 of the line frame portion K, The right end U2 coincides with the upper right vertex K2. Hereinafter, the right side portion R has an upper end portion R1 that coincides with the upper right vertex K2 and a lower end portion R2 that coincides with the lower right vertex K3, and the lower side portion B has a right end portion B1 and lower left portion that coincide with the lower right vertex K3. The left side B has a left end B2 that coincides with the vertex K4, and the left side L has a lower end L1 that coincides with the lower left vertex K4 and an upper end L2 that coincides with the upper right vertex K1. The plotting memory 12 also stores mathematical formula data representing each side U, R, B, L.

  Further, when the user gives an instruction to move the vertices K1 to K4 to the projector 10 at the time of correcting the trapezoidal distortion, the system control unit 11 grasps the change amount related to the movement and stores the change amount in the drawing memory 12. The process of adding to the coordinate data being performed is performed, whereby the contents of the coordinate data stored in the drawing memory 12 are changed as needed. For example, when the system control unit 11 grasps that the vertex K2 is moved by “+5” with respect to the X coordinate and “−2” with respect to the Y coordinate based on the user's movement instruction, it is stored in the drawing memory 12. The numerical value of (+5, −2) is added to the coordinate data (X2, Y2) of the vertex K2, and the changed data value is stored in the drawing memory 12. Further, the mathematical formula data representing each side U, R, B, and L is also changed by the system control unit 11 with the change of the data value, and the changed mathematical formula data is also stored in the drawing memory 12.

  The drawing memory 12 stores the data of the icon of the cursor C arranged at any one of the vertices K1 to K4 of the line frame portion K as a cursor image 26. Furthermore, it is assumed that the drawing memory 12 is provided with a memory area h (see FIG. 21C) in which the contents of the location of the cursor C are stored in accordance with the deformation of the line frame portion K.

  Further, the programs 27 to 28 and the like stored in the ROM 13 of FIG. 1 define the contents of the control process performed by the system control unit 11 based on the operation from the user received by the remote control device 20 and the operation unit 22.

  The OSD display program 27 defines what the system control unit 11 performs on the projection image pattern switching unit 17 and the projection device unit 18 when performing various OSD displays. The drawing program 28 prescribes a drawing process for overlapping images related to the present invention, and details of the prescription will be described later. Further, the projection control program 29 mainly defines the control contents relating to the focusing of the projection device unit 18 and the projection lens 19.

  Note that the processing contents related to the OSD display defined by the OSD display program 27 include processing related to the display of the trapezoidal distortion correction image G shown in FIG. 2, and the control performed by the system control unit 11 in accordance with the processing contents is as follows. Street.

  First, when an instruction (instruction signal) for displaying the image G in FIG. 2 is received by the remote control light receiving unit 21 or the operation unit 22, the instruction signal is transmitted to the system control unit 11, and the system control unit 11 is sent to the drawing memory 12. Control is performed so that the projected image pattern switching unit 17 creates the image G based on the stored contents. When the remote control light receiving unit 21 or the operation unit 22 receives an instruction (instruction signal) for changing the vertex to be moved, the system control unit 11 creates an image G pasted on another vertex of the cursor C according to the instruction signal. In this manner, the projection image pattern switching unit 17 is controlled.

  Further, when an instruction (instruction signal) for moving the cursor C is received from the remote control light receiving unit 21 or the operation unit 22, the system control unit 11 performs control to move the vertex corresponding to the cursor C based on the instruction, and changes by movement. The coordinate data and mathematical formula data of the vertexes specified are specified and written into the drawing memory 12.

  On the other hand, when the image G of FIG. 2 is projected on the screen 30, the drawing program 28 receives the instruction (instruction signal) for moving the cursor C from the remote control light receiving unit 21 or the operation unit 22. Defines the contents of the processing performed by. Regarding the plotting process of the system control unit 11, the rate of increase in processing load is reduced compared to the prior art due to the contents defined in the plotting program 28 even if the line frame part K overlaps the band frame part W. Hereinafter, processing contents performed by the system control unit 11 and the like based on the specified contents of the drawing program 28 will be described.

  First, as shown in FIG. 3A, when the upper right vertex K2 on which the cursor C of the line frame portion K is placed is moved in order to perform trapezoidal distortion correction, the system control unit 11 moves the vertex K2 to be moved. To determine whether or not overlaps with the band part W. That is, the system control unit 11 specifies the coordinate data (X2, Y2) of the vertex K2 shown in FIG. 2 from the contents stored in the plotting memory 12, and the outer periphery of the belt frame portion W corresponding to the upper right vertex K2. Specify mathematical data of the upper horizontal line W1 (y = A1), the inner peripheral upper horizontal line W2 (y = A2), the outer peripheral right vertical line W3 (x = B3), and the inner peripheral right vertical line W4 (x = B4), The overlap is determined from the positional relationship between the identified vertex K2 and the lines W1 to W4.

  Regarding the determination of overlap, the system control unit 11 determines whether the relationship of B3 <X2 <B4 is established with respect to the X coordinate, and whether the relationship of A1 <Y2 <A2 is established with respect to the Y coordinate. If the above relationship is established on at least one of the coordinates, it is determined that the vertex K2 overlaps with the belt frame portion W. If the above relationship is not established on both coordinates, the vertex K2 does not overlap with the belt frame portion. Judge. In the present embodiment, it is assumed that the vertices K1 to K4 of the line frame portion K do not move outward beyond the lines W1, W3, W5, and W7 on the outer peripheral side of the belt frame portion W.

  Further, when the system control unit 11 determines that the vertex K2 is overlapped, next, the intersections of the upper side U and right side R of the line frame part K and the lines W2 and W4 on the inner peripheral side of the band frame part W are determined. Perform the specified process. When the system control unit 11 obtains the intersection of two straight lines, if the formula of one straight line is y = ax + b and the mathematical formula of the other straight line is y = cx + d, “a” and “c” If they are not the same, the X coordinate of the intersection is calculated by x = (db) / (ac), the Y coordinate is calculated by (ad-bc) / (ac), and "a" and "c" If they are the same, specify that no intersection exists. In addition, the system control unit 11 crosses each of the side portions U and R of the line frame portion K with each of the lines W2 and W4 on the inner peripheral side of the belt frame portion W from the relationship with the coordinates in the above-described determination of overlap. Determine whether.

  In the case shown in FIG. 3B, each side U, R of the line frame K crosses the inner peripheral right vertical line W4 (x = B3) of the band frame W, so that the system control unit 11 The coordinate data of the intersection point P1 of U and the inner peripheral right vertical line W4 is calculated, and the coordinate data of the intersection point P2 of the right side R and the inner peripheral right vertical line W4 is calculated. When the intersection points P1 and P2 are calculated in this way, the system control unit 11 draws the projection image pattern switching unit 17 so as not to draw the range of the upper side portion U and the right side portion R that are on the + side of the X coordinate from the intersection points P1 and P2. Control processing. As a result, the projection image pattern switching unit 17 draws the line frame part K in which the drawing of the portion overlapping with the belt frame part K is omitted.

  In the processes from the determination of the overlap to the drawing of the overlapped portion as described above, the system control unit 11 continuously receives an instruction relating to the movement of the cursor C transmitted from the remote control light receiving unit 21 or the operation unit 22. Control is performed repeatedly for a period of time, and when the acceptance of the instruction is interrupted, the repetition process is terminated, and control is returned to the process of drawing the omitted portion. Whether or not an instruction relating to movement is continuously received is determined based on whether or not an instruction signal is received within a predetermined period. In this embodiment, the system control is performed for 500 ms (milliseconds). Judgment is made based on whether the unit 11 has received an instruction signal.

Next, the contents of a series of drawing processes based on the control process of the system control unit 11 described above will be described.
4 to 6 show the contents of one cycle of the plotting process according to the present invention, and correspond to the conventional one-cycle plotting process shown in FIGS. FIGS. 4A to 4G show the contents of the drawing process in the first cycle when the movement of the cursor C (vertex K2) is started, and FIGS. 5A to 5F show the movement of the cursor C. FIG. 6A to FIG. 6F illustrate the contents of the last one cycle of the plotting process when the continuous movement instruction is interrupted.

  4A to 4D are the same as the conventional contents of FIGS. 21A to 21D as the drawing process of the first cycle after the start of movement. Assume that intersections P1 and P2 are calculated as shown in FIG. Next, in FIG. 4 (e), the upper side U and the right side R showing the moved state are drawn, but the calculated points of intersection P1, P2 with respect to the band frame W of each side U, R. Duplicate parts are not drawn. Then, after copying the state of the range H related to the arrangement of the cursor C to the memory area h as shown in FIG. 4 (f), the icon of the cursor C is pasted as shown in FIG. 4 (g). The subsequent plotting process has the contents shown in FIGS.

  The contents of FIGS. 5A and 5B are the same as the conventional processes shown in FIGS. 21A and 21B, but the displayed contents and the contents copied to the memory area h The drawing of a part of the upper side U and the right side R is omitted. FIG. 5C shows the contents of the upper side U and the right side R, which are partially omitted, drawn with the background color of the image G, but the upper side U and the left side R overlap with the belt frame W. Therefore, the defect portion Wa as shown in FIG. 21C does not occur. Therefore, a processing step for erasing the missing portion Wa becomes unnecessary, and in FIG. 5D, the upper side portion U and the right side portion R with the overlapping portions omitted in the moved state are drawn. Note that the contents of FIGS. 5E and 5F are the same as the processes of FIGS. 4F and 4G.

  When the processing contents of one cycle shown in FIGS. 5A to 5F are compared with the conventional processing contents of FIGS. 21A to 21G, one process is reduced, and the system control is correspondingly reduced. The processing burden on the unit 11 and the like is reduced. The processing contents shown in FIGS. 5A to 5F are continued during the movement of the vertex K2, so that the difference in the number of processes to be processed becomes longer as the movement time of the vertex K2 becomes longer. Increased between the invention and the prior art. Further, when the instruction relating to the movement is interrupted, the processing shown in FIGS. 5A to 5F is shifted to the processing shown in FIGS. 6A to 6F.

  6 (a) to 6 (c) are the same as the processes shown in FIGS. 5 (a) to 5 (c), and have been moved including the parts that have been omitted in FIG. 6 (d). The upper side U and the right side R showing 6 (e) and 6 (f) are equivalent to the conventional processing contents shown in FIGS. 21 (f) and 21 (g). Therefore, in the state where the instruction relating to the movement is interrupted and the vertex K2 stops moving, It is possible to display a complete image G similar to the above. In addition, even in the last one cycle according to FIGS. 6A to 6F, one process is reduced compared to the conventional drawing process shown in FIGS. 21A to 21G.

The flowchart in FIG. 7 is an arrangement of a series of processing procedures related to the display of the image G with respect to the trapezoidal distortion correction of the projector 10 according to the present invention described above. Hereinafter, the processing procedure of the image display method of the projector 10 will be described according to this flowchart.
First, when receiving an instruction for correcting trapezoidal distortion from the user, the projector 10 projects the light representing the image G as shown in FIG. 2 and displays the image G on the screen 30 (S1). Note that the processing related to the drawing of the image G at this time has basically the same processing contents as the conventional one.

  Next, the projector 10 determines whether or not an instruction to move the cursor C is received based on a user operation while the image G is displayed (S2). When the movement instruction is not received (S2: NO), the movement instruction is awaited. When the movement instruction is received (S2: YES), it is determined whether or not the vertex K2 related to the movement overlaps the belt frame portion W. (S3). If it is determined that there is no overlap (S3: NO), the process returns to the step (S1) of displaying the image G based on the drawing process equivalent to the conventional one.

  If it is determined that there is an overlap (S3: YES), a cycle for drawing an image in which the drawing of the overlapping portion is omitted is started and the image is displayed (S4). It should be noted that the drawing of the image in which the drawing of the overlapping portion is omitted is performed in the first cycle according to FIGS. 4A to 4G when the displayed images overlap in the form shown in FIG. This is performed based on the drawing process. Then, the projector 10 determines whether or not the instruction for moving the cursor C is continuously received (S5), and when it is determined that the reception of the movement instruction is continued (S5: YES), a determination step for duplication. Return to (S3). Therefore, while the vertex K2 still overlaps with the belt frame W and the movement continues, the process from the determination stage of duplication (S3) to the determination stage of continuous reception of the movement instruction (S5) is repeated. Become. In this case, the drawing in the image display stage (S4) in which the drawing of the overlapping portion is omitted is performed when the displayed image has the overlapping form shown in FIG. 20B, FIGS. One cycle of processing is performed based on the contents shown in FIG.

  On the other hand, when it is determined that the acceptance of the movement instruction has been interrupted (S5: NO), an image in which the omitted part is drawn is drawn and displayed (S6). It should be noted that the drawing process at this stage (S6) has the contents shown in FIGS. 6A to 6F when the displayed image has the overlapping form shown in FIG.

  In this way, in the present invention, a part of the display is omitted during the movement of the vertex K2, so that the processing load related to the drawing can be reduced, and the omitted part is accurately drawn when the movement of the vertex K2 stops. The image can be displayed, and the extent of the drawing process and the content of the displayed image are balanced. Further, during the movement of the vertex K2, for example, as shown in FIGS. 5A to 5F, the number of steps in one cycle is reduced, so that the drawing process can be performed more smoothly than in the prior art. The content of the image G displayed during the movement of K2 follows the content of the operation performed by the user, and the operational feeling is improved.

In the present invention, since the processing load can be reduced even if the line frame portion K and the band frame portion W are in other overlapping forms, the contents of the drawing process in other overlapping forms will be described below.
FIGS. 8 to 10 correspond to the conventional one-cycle drawing process shown in FIGS. 22A to 22H, and FIGS. 8A to 8H show the movement of the cursor C (vertex K2). FIG. 9A to FIG. 9F show the contents of the drawing process for the first cycle when starting, FIG. 9A to FIG. 9F show the contents of the drawing process for one cycle while accepting the movement instruction for the cursor C, and FIG. (E) shows the drawing processing contents of the last one cycle when the continuous movement instruction is interrupted.

  8A to 8E are the same as the contents shown in FIGS. 22A to 22E as the drawing process for one cycle of the movement start. At this time, the upper side U and the belt frame W Is calculated by the system control unit 11. Next, in FIG. 8F, the upper side U ′ and the right side R showing the moved state are drawn, but the drawing of overlapping portions is omitted for the upper side U ′ at the calculated intersection. Therefore, the line frame portion K ′, which is partially omitted, is displayed by the upper side portion U ′ where the vertex K1 side is omitted. Then, the state of the range H related to the arrangement of the cursor C is copied to the memory area h as shown in FIG. 8G, and the icon of the cursor C is pasted as shown in FIG. This process is completed. Thereafter, the drawing contents shown in FIGS. 9A to 9F are obtained.

  The processing of FIGS. 9A and 9B is the same as the conventional processing of FIGS. 22A and 22B, and the displayed content and the content copied to the memory area h are omitted. Includes an upper side U ′. FIG. 9C shows the contents of the upper side U ′ and the right side R drawn with the background color of the image G. However, the missing part Wa as shown in FIG. The processing step for erasing Wa becomes unnecessary, and in FIG. 9D, the upper side U ′ and the right side R showing the moved state are drawn. In addition, the content of FIG.9 (e), (f) is the same as that of FIG.8 (g) (h). Further, when the continuous acceptance of the movement instruction is interrupted, the process proceeds to the process shown in FIGS. 10A to 10E in the last one cycle.

  The processing contents of FIGS. 10A and 10B are the same as those shown in FIGS. 9A and 9B. In FIG. 10C, the upper side U and the right side R that do not omit the vertex K1 side are drawn. Then, in FIGS. 10D and 10E, the same content as the conventional processing shown in FIGS. 22G and 22H is performed, and the overlapping portion is not omitted when the vertex K2 stops moving. Image G is displayed. As described above, in the processing according to FIGS. 8 to 10, in the processing during movement shown in FIGS. 9A to 9F, compared with the conventional processing shown in FIGS. In the last cycle shown in FIGS. 10A to 10E, a reduction of 3 processes can be achieved.

  FIGS. 11 to 13 correspond to the conventional one-cycle drawing process shown in FIGS. 23A to 23I, and FIGS. 11A to 11I show the movement of the cursor C (vertex K2). FIG. 12A to FIG. 12F show the contents of the drawing process for one cycle while accepting the movement instruction, and FIG. 13A to FIG. ) Shows the contents of the drawing process in the last one cycle when the continuous movement instruction stops.

  FIGS. 11A to 11F are the same as the contents of FIGS. 23A to 23F as the drawing process for one cycle of the movement start. At this time, the side portions U and R and the belt frame portion W are the same. Is calculated by the system control unit 11. Next, in FIG. 11G, a line frame in which the upper side U ′ and the right side R ′ showing a moving state in which the drawing of the overlapping portion is omitted at the calculated intersection is drawn and a part thereof is omitted. Part K 'is displayed. Then, the state of the range H related to the arrangement of the cursor C is copied to the memory area h as shown in FIG. 11 (h), and the icon of the cursor C is pasted as shown in FIG. This process is completed. After this, the contents of the drawing process shown in FIGS.

  The processes shown in FIGS. 12A and 12B are the same as those shown in FIGS. 23A and 23B, but the displayed contents and the contents copied to the memory area h are as follows. The line frame portion K ′ is configured by the upper side portion U ′ and the right side portion R ′, which are partially omitted. FIG. 12C shows the contents of the upper side U ′ and the right side R ′ drawn with the background color of the image G, but the missing portions Wa1 and Wa2 as shown in FIG. 23C do not occur. . Further, in FIG. 12D, an upper side U ′ and a right side R ′ showing the moved state are drawn, and in FIGS. 12E and 12F, the same processing contents as those in FIGS. Is done.

  Further, when the continuous acceptance of the movement instruction is interrupted, the process proceeds to the process shown in FIGS. 13A to 13E in the last cycle, and the processing contents of FIGS. 13A and 13B are as shown in FIG. a) The same as shown in (b). Further, in FIG. 13C, the upper side U and the right side R which do not omit the overlapping portion are drawn, and in FIGS. 13D and 13E, the content equivalent to the processing shown in FIGS. Done. As described above, in the case of FIGS. 11 to 13, the moving process shown in FIGS. 12A to 12F is in one cycle as compared with the conventional process shown in FIGS. In addition, the process of three steps can be reduced, and the process of four steps can be reduced in the last one cycle shown in FIGS.

  14 to 16 correspond to the conventional one-cycle drawing process shown in FIGS. 24A to 24I, and FIGS. 14A to 14H show the movement of the cursor C (vertex K2). FIG. 15 (a) to FIG. 15 (f) show the contents of the drawing process for one cycle while receiving the instruction to move the cursor C, and FIG. (F) shows the contents of the drawing process in the last one cycle when the continuous movement instruction is interrupted.

  14A to 14E are the same as the contents of FIGS. 24A to 24E as the drawing process of one cycle of the movement start. At this time, the intersection of the right side U and the belt frame W Is calculated by the system control unit 11. Next, in FIG. 14F, a right frame portion R ′ showing a moving state where drawing of overlapping portions is omitted at the calculated intersection is drawn, and a line frame portion K ′ with a part omitted is displayed. Is done. Then, the state of the range H related to the arrangement of the cursor C is copied to the memory area h as shown in FIG. 14G, and the icon of the cursor C is pasted as shown in FIG. This process is completed. After this, the contents of the drawing process shown in FIGS.

  The processing in FIGS. 15 (a) and 15 (b) is the same as the conventional processing in FIGS. 24 (a) and 24 (b). The displayed content and the memory area h have an upper side U ′. The contents of the right side portion R ′, which is omitted and part of the vertex K2 side is omitted, are copied. FIG. 15C shows the content of the right side portion R ′ drawn with the background color of the image G, but the missing portion Wa as shown in FIG. 24C does not occur. Further, in FIG. 15 (d), the right side portion R 'in the moved state is drawn, and the same drawing process as in FIGS. 14 (g) and 14 (h) is performed as FIGS. 15 (e) and 15 (f).

  When the continuous acceptance of the movement instruction is interrupted, the process proceeds to the process shown in FIGS. 16A to 16F in the last cycle, and the processing contents of FIGS. 16A and 16B are as shown in FIG. The same as shown in (b). Further, in FIG. 15C, the right side portion R that does not omit the overlapping portion is drawn, and in FIG. 15D, the upper side portion U is drawn, and the line frame portion K that does not omit the overlapping portion is displayed. . Finally, in FIGS. 16E and 16F, contents equivalent to the processing shown in FIGS. 24H and i are performed. As described above, in the case of FIGS. 14 to 16, the first process shown in FIGS. 14 (a) to (h) is in one cycle compared to the conventional process shown in FIGS. 24 (a) to 24 (i). 15A to 15F, the moving process shown in FIGS. 15A to 15F can reduce the process of 3 steps in one cycle, and the last process shown in FIGS. 16A to 16F. Even one cycle can reduce the processing of three steps.

  Note that the present invention can similarly reduce the processing load other than the above-described overlapping form. For example, when the line frame portion K and the belt frame portion W overlap at three points K1 to K3 shown in FIG. Then, it is possible to reduce the number of processes in two steps for the process in which the vertex K2 is moving and the process content in which the movement is stopped.

  In addition to the OSD display related to trapezoidal distortion correction, the present invention includes a display target image including a plurality of display objects in other types of OSD display, and each display object overlaps and a portion related to the overlapped portion is moved. Applicable when Furthermore, the present invention can be similarly applied to a case where a plurality of display objects are drawn for a projector having a drawing function and the respective display objects overlap.

  18A to 18C show the contents of the ring-shaped first object R and the straight line second object L10 drawn by the drawing, and the first object R is drawn after the first drawing. It is assumed that the object L10 is drawn so that the start point L10a is a fixed point and the end point L10b is extended while changing the direction as appropriate. The cursor C is arranged so as to overlap the end point L10b, and the cursor C moves while changing the direction as appropriate based on a drawing instruction from the user, and accordingly, the end point L10b extends while changing the direction.

  In the state shown in FIG. 18A, since the objects R and L10 do not overlap, the drawing process related to the display is performed with the same contents as in the prior art. In FIG. 18B, since the cursor C has moved to the inside of the ring shape of the first object R, the objects R and L10 overlap each other. In this case, the projector 10 determines whether or not the position of the outer circumference circle R1 forming the outer circumference of the first object and the inner circumference circle R2 forming the inner circumference and the start point L10a and the end point L10b of the second object L10. The two objects R and L10 are determined to overlap when the circles R1 and R2 are located between the points L10a and L10b.

  Also, when it is determined that they overlap, the intersection points P10 and P11 are calculated using a straight line mathematical expression representing the second object L10 and a mathematical expression representing each of the circles R1 and R2 in the overlapping range. While moving, the drawing of the overlapping part between the intersections P10 and P11 is omitted.

  Further, as shown in FIG. 18C, when the end point L10b passes through the first object R due to the movement of the cursor C, the intersection calculation is performed in the same manner as described above, and the end point L10b moves with the cursor C while changing its direction. While this is done, drawing is omitted from the overlapping points between the intersections P10 and P11 and between the intersections P12 and P13. Further, when the reception of the instruction to move the cursor C is interrupted and the movement of the end point L10b is stopped, the omitted part is drawn and the second object L10 is continuously displayed. In this way, the processing of the image display method according to the present invention can also be applied to the projector 10 having a drawing function. Note that the present invention can be applied to both the front projection method and the rear projection method when a plurality of display objects overlap and the overlapping portion of one display object moves.

It is a block diagram which shows the internal structure of the projector which concerns on embodiment of this invention. It is the schematic which shows the image for trapezoid distortion correction. (A) is the principal part enlarged view of the image for trapezoid distortion correction, (b) is an enlarged view which shows the overlapping part of a line frame part and a belt frame part. (A)-(g) is an enlarged view which shows the content of the plotting process which concerns on the 1st cycle in the duplication location when a vertex starts a movement, and the memory content of a memory area. (A)-(f) is an enlarged view which shows the drawing processing content of 1 cycle in the duplication location where the vertex is moving, and the memory content of a memory area. (A)-(f) is an enlarged view which shows the plotting process content concerning the last 1 cycle in the duplication location when a movement stops, and the memory content of a memory area. It is a flowchart which shows the process sequence which concerns on the image display method of this invention. (A)-(h) is the schematic which shows the drawing process content which concerns on the first 1 cycle when one place overlaps and a vertex starts a movement. (A)-(f) is the schematic which shows the drawing process content concerning 1 cycle when one place overlaps and the vertex is moving. (A)-(e) is the schematic which shows the drawing process content which concerns on 1 cycle when one place overlaps and a movement stops. (A)-(i) is the case where two places overlap, and is a schematic diagram showing the contents of drawing processing concerning the first one cycle when a vertex starts moving. (A)-(f) is the schematic which shows the drawing process content concerning 1 cycle when two places overlap and a vertex is moving. (A)-(e) is the case where two places overlap, and is a schematic diagram showing the contents of drawing processing concerning one cycle when movement stops. (A)-(h) is the case where the upper side part of a line frame part overlaps, It is the schematic which shows the drawing process content concerning the first 1 cycle when a vertex starts a movement. (A)-(f) is the schematic which shows the drawing process content concerning 1 cycle when the upper side part of a line frame part overlaps and the vertex is moving. (A)-(f) is the case where the upper side part of a line frame part overlaps, It is the schematic which shows the drawing process content concerning 1 cycle when a movement stops. It is the schematic which shows the image which a line frame part and a strip frame part overlap in three places. (A)-(c) is the schematic which shows the condition where two objects overlap by drawing. It is the schematic which shows the state which displayed the image for trapezoid distortion correction on the screen by the projection of a projector. (A) is the schematic which shows the image where the line frame part and the strip frame part do not overlap, (b) is the schematic which shows the image where the line frame part and the strip frame part overlapped. (A)-(g) is an enlarged view which shows the plotting process content concerning the conventional 1 cycle in the duplication location when a vertex moves, and the memory content of a memory area. (A)-(h) is the schematic which shows the plotting process content which concerns on the conventional 1 cycle when one place overlaps and a vertex moves. (A)-(i) is the schematic which shows the drawing process content concerning one conventional cycle when a vertex moves when two places overlap. (A)-(i) is the schematic which shows the drawing process content concerning one conventional cycle when a vertex moves in the case where the upper side part of a line frame part overlaps.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Projector 11 System control part 17 Projection image pattern switching part 20 Remote control device 21 Remote control light-receiving part 22 Operation part 30 Screen G Image K Line frame part K1-K4 Vertex U Upper side part R Right side part B Lower side part L Left side part W Band frame part C Cursor P1, P2 Intersection

Claims (8)

A movement instruction receiving unit that receives an instruction to move the display object when the image representing the image including the plurality of display objects is projected and the image is displayed on the projection object, and the display object according to the instruction received by the movement instruction receiving unit In a projector provided with an image creating means for creating an image that has been moved,
A duplication determination unit that determines whether or not a plurality of display objects overlap based on an instruction received by the movement instruction reception unit;
The projector according to claim 1, wherein the image creating means includes means for creating an image in which drawing of an overlapping portion of a display object to be moved is omitted when the overlap determining means determines that a plurality of display objects overlap. End position specifying means for specifying an end position of a display object that is a target of an instruction received by the movement instruction receiving means;
An outline specifying means for specifying an outline of another display object, and
The overlap determining unit determines whether or not a plurality of display objects overlap based on a positional relationship between the end position specified by the end position specifying unit and the contour line specified by the contour line specifying unit. The projector according to claim 1, comprising means. An intersection specifying means for specifying an intersection between a display object to be received by the movement instruction receiving means and an outline specified by the outline specifying means;
3. The projector according to claim 2, wherein the image creating unit omits drawing of an overlapping portion with the intersection specified by the intersection specifying unit as a boundary. Image creating means for creating an image including a rectangular frame representing the display range and a line frame representing a trapezoidal distortion correction rectangle, and light representing the image created by the frame image creating means to the projection object A projection unit for projecting; and a movement instruction reception unit for receiving an instruction to move the vertex of the line frame when an image is displayed on the projection target. The image generation unit is received by the movement instruction reception unit. In a projector that creates an image in which the vertex of the line frame portion is moved according to an instruction,
A duplication judgment means for judging whether or not the line frame portion overlaps the band frame portion based on an instruction received by the movement instruction reception means;
The image creating means includes means for creating an image in which drawing of an overlapping portion of the line frame portion is omitted when the line determining portion determines that the line frame portion overlaps the band frame portion. Projector. The movement instruction receiving means can continuously receive instructions,
A determination unit that determines whether or not the continuous instruction reception by the movement instruction reception unit is interrupted;
5. The image forming unit according to claim 1, further comprising: a unit that continues to generate an image in which overlapping portions are not drawn when it is determined by the determining unit that acceptance of a continuous instruction is not interrupted. The projector as described in any one.   The projector according to claim 5, wherein the image creating unit includes a unit that creates an image in which an overlapped portion that has been omitted is drawn when it is determined by the determining unit that acceptance of a continuous instruction has ceased. When a projector displays a light representing an image including a plurality of display objects, displays an image on the projection target, and receives a movement instruction to move the display object while the image is displayed, the display object is displayed according to the received movement instruction. In an image display method for a projector that creates a moved image, projects light representing the image, and displays the projected image on a projection object.
The projector is
Based on the received movement instruction, determine whether multiple display objects overlap,
An image display method characterized in that when it is determined that a plurality of display objects overlap, an image in which drawing of overlapping portions of a display object to be moved is omitted is created. The projector can continuously accept a movement instruction,
Determine whether or not the acceptance of continuous movement instructions has ceased,
The image display method according to claim 7, wherein when it is determined that the continuous movement instruction is not received, an image in which the omitted overlapping portion is drawn is created.

Images