JP2008293289A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector allowing freer movement of a pointer graphic that displays, overlapping on a projected image. <P>SOLUTION: When this projector 1 displaying the pointer graphic, indicating an arbitrary portion on the image projected onto a screen S continuously, receives prescribed instructions in a predetermined order by depressing, or the like, of cursor keys of a remote controller 10 in prescribed order by a user, the projector 1 performs processings for continuously changing the position of the pointer graphic on the projection image such that a track of the pointer graphic draws a prescribed shape, such as, a circle or a straight line. A presenter by operating the remote controller 10, freely moves the pointer graphic, for example, makes the track of the pointer graphic draw the shape, such as circles or straight lines at arbitrary positions, so as to readily enhance a desired portion on the image. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector that projects an image, and more particularly, to a projector that has a function of displaying a pointer graphic indicating an arbitrary portion on a projected image on the image.

  In the field of presentation, a projector that projects an image on a screen with light from a light source lamp is often used. For example, by projecting a display screen of a personal computer (PC) as an image, various materials created by the PC can be easily released, and the presenter can proceed with the presentation while referring to the material released as a projected image. it can.

  When a presentation is performed while projecting an image with a projector, the presenter may indicate a part of the projected image. At this time, the presenter generally uses a pointer or a laser pointer. Laser pointers are easier to use than pointers and do not obscure a portion of the projected image like pointers, so that presenters often use laser pointers.

Patent Document 1 discloses a technology that can change the shape of light irradiated by a laser pointer according to the content of the presentation by control from a PC in order to improve the visibility of the irradiation position by the laser pointer. Patent Document 2 discloses a technique in which a projector performs the function of a laser pointer by projecting a figure equivalent to the light irradiated by the laser pointer on an image in an overlapping manner.
JP 2000-284222 A JP-A-9-325411

  When the presenter operates the laser pointer by hand as in the technique disclosed in Patent Document 1, the presenter needs to make an announcement while always adjusting the irradiation position of the laser pointer by hand. There is a problem that it is difficult to concentrate. In the case where the function of the laser pointer is performed by the projector as in the technique disclosed in Patent Document 2, the present invention moves the pointer graphic on the projected image by operating the cursor key provided in the remote controller (remote controller). There is a problem that the operability for moving the pointer graphic to a desired position is poor. For example, when the laser pointer is operated by hand, the irradiation light can be moved freely, such as moving the irradiation light in a circle around the part to be emphasized on the projected image, whereas the cursor on the remote control When operating keys, it is difficult to move the pointer graphic in the same way.

  The present invention has been made in view of such circumstances, and the object of the present invention is to make the pointer graphic displayed on the projection image more freely movable so as to be more comfortable. It is to provide a projector that can realize a simple presentation.

  The projector according to the present invention projects an image, and displays a pointer graphic on the image that points to an arbitrary part on the projected image, so that the locus of the pointer graphic draws a predetermined shape on the image. The apparatus further comprises means for continuously changing the position of the pointer graphic.

  According to another aspect of the invention, there is provided a projector including a unit that projects an image, displays a pointer graphic indicating an arbitrary part on the projected image, and a reception unit that receives a plurality of commands. Processing means for continuously changing the position of the pointer graphic on the image so that the locus of the pointer graphic draws a predetermined shape when a predetermined command is continuously received in a predetermined order It is characterized by that.

  The projector according to the present invention is a projector including a unit that projects an image, displays a pointer graphic indicating an arbitrary part on the projected image, and a reception unit that receives a plurality of commands. Storage means for storing a sequence of predetermined predetermined instructions in association with a process of continuously changing the position of the pointer graphic on the image so that the locus of the pointer graphic draws a predetermined shape And a temporary storage unit that stores a plurality of instructions received in the order received, and a sequence of the plurality of instructions stored in the temporary storage unit when the reception unit receives the instructions. Means for determining whether or not it matches the order of predetermined instructions stored in the memory, and the storage means stores the order of a plurality of instructions stored in the temporary storage means If it is determined that coincides with the order of the constant instruction, characterized in that it comprises a processing means for executing the process associated with the order of the predetermined instruction.

  When it is determined that the order of the plurality of commands stored in the temporary storage unit does not match the order of the predetermined commands stored in the storage unit, the projector according to the invention follows the command received by the receiving unit. The apparatus further includes means for executing processing.

  In the projector according to the aspect of the invention, the command is a command for instructing to move the pointer graphic in any direction on the image.

  The projector according to the present invention includes means for counting the time elapsed since the receiving means last received a command, and means for changing the pointer graphic when the time counted by the means exceeds a predetermined time. It is further provided with the feature.

  The projector according to the present invention further includes means for changing a position or size of a predetermined shape drawn by the locus of the pointer graphic.

  The projector according to the present invention is characterized in that the processing means is configured to temporarily display a graphic indicating a range in which the position of the pointer graphic is continuously changed on an image.

  In the present invention, when a projector that displays a pointer graphic on a projected image continuously receives a predetermined command in a predetermined order, the locus of the pointer graphic has a predetermined shape such as a circle or a straight line. As shown, the position of the pointer graphic on the image is continuously changed. For this reason, when the user inputs a predetermined command in a predetermined order, the pointer graphic is drawn in a shape such as a circle or a straight line on the image.

  In the present invention, the command that is continuously accepted to draw a shape such as a circle or a straight line on the pointer graphic on the image is a movement command that instructs the movement of the pointer graphic.

  In the present invention, the projector makes it easier to recognize the pointer graphic by changing the pointer graphic to another graphic having a different size, shape, or the like when no instruction is received for a predetermined time.

  In the present invention, the projector can change the position or size of the shape drawn by the locus of the pointer graphic, so that the position of the pointer graphic can be continuously changed at an arbitrary part on the image.

  Furthermore, in the present invention, the projector indicates the range of the shape drawn by the locus of the pointer graphic by indicating the range in which the position of the pointer graphic is continuously changed.

   In the present invention, a presenter who makes a presentation using a projector inputs a predetermined command in a predetermined order, so that a locus such as a circle or a straight line is formed on the locus of the pointer graphic at a desired portion on the projection image. Therefore, a desired portion on the projected image can be emphasized with the same operability as when operating the laser pointer by hand. Further, the present invention has an excellent effect such that the presenter can concentrate on the presentation without being bothered by emphasizing a desired portion as in the case of operating the laser pointer by hand.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
FIG. 1 is a block diagram showing an internal functional configuration of a projector 1 according to the present invention. The projector 1 includes a control processing unit 11 including a processor that performs calculation and a RAM that stores information associated with the calculation. The control processing unit 11 is connected to a ROM 12 that stores various information and control programs necessary for controlling the projector 1, and the control processing unit 11 is configured according to the information and control programs stored in the ROM 12. The process which controls operation | movement of is performed. The control processing unit 11 includes a remote control receiving unit 14 that receives a signal transmitted from the remote control 10 operated by the user using infrared rays or radio waves, and various switches, and receives various commands by the user's operation. The unit 15 is connected. The control processing unit 11 is configured to receive various commands at the remote control receiving unit 14 or the operation unit 15 and execute processing according to the received commands. The remote control receiving unit 14 or the operation unit 15 functions as a receiving unit in the present invention. The control processing unit 11 is connected to a command memory (temporary storage means) 13 for storing a plurality of received instructions in the order received.

  The projector 1 also includes a planar image forming panel 21 made of a liquid crystal panel, DMD, or the like. The image forming panel 21 has a plurality of pixels made of liquid crystal, micromirrors, or the like, and is defined by the number of pixels. The panel image is formed at a predetermined resolution. The projector 1 is configured to irradiate light to the image forming panel 21 using a light source and an optical system (not shown). Further, the projector 1 is irradiated with the image forming panel 21 on which the panel image is formed. A projection lens 3 that projects the reflected light to the outside is provided. A white arrow in FIG. 1 indicates light. The light from the projection lens 3 is projected onto the screen S outside the projector 1, and a projection image is projected on the surface of the screen S. The projector 1 may be configured to project a projection image by projecting light transmitted through the image forming panel 21 on which the panel image is formed, by the projection lens 3.

  The projector 1 also includes an input unit 16 that receives image data from an external device such as a PC. Connected to the input unit 16 is an image processing unit 23 that performs processing for adjusting the image based on the image data input to the input unit 16 so that the projector 1 can project the image, such as changing the resolution, size, or shape of the image. Has been. Connected to the image processing unit 23 is an image generation unit 22 that includes an image processed by the image processing unit 23 and generates an image to be formed on the image forming panel 21. The image generating unit 22 is connected to the image forming panel 21, and the image forming panel 21 is configured to form an image generated by the image generating unit 22. The image processing unit 23 and the image generation unit 22 are configured by an arithmetic circuit including an image processing memory and a processor. Note that the image processing unit 23 and the panel image generation unit 22 may be configured by a single arithmetic circuit capable of executing the processing to be performed, and more than those configured for each individual processing to be performed. The form which consists of these arithmetic circuits may be sufficient.

  The image forming panel 21 is connected to a pointer image generation unit 24 that generates a pointer image including a pointer graphic indicating an arbitrary part on the projected image. The input unit 16, the pointer image generation unit 24, the image processing unit 23, the image generation unit 22, and the image forming panel 21 are connected to the control processing unit 11 and operate according to control by the control processing unit 11. The control processing unit 11 stores image data of a pointer graphic, causes the pointer image generation unit 24 to generate a pointer image, and causes the image forming panel 21 to form a pointer image on the image generated by the image generation unit 22. The projected image including the pointer graphic is projected onto the screen S by projecting the light reflected by the image forming panel 21 on which the image is formed. In addition, the control processing unit 11 causes the pointer image generation unit 24 to generate a pointer image in which the position of the pointer graphic in the pointer image is changed, and superimposes the pointer image on the image forming panel 21 on the image generated by the image generation unit 22. By forming, the position of the pointer graphic on the projected image is changed.

  FIG. 2 is a schematic diagram showing a part of the remote controller 10. Reference numerals 10a to 10d in the figure are cursor keys for the user to input a movement command for instructing to move the pointer graphic in each of the upper, right, lower and left directions on the projection image. For example, when the user presses the right cursor key 10b, the remote controller 10 transmits a signal indicating a move command in the right direction and is received by the remote control receiving unit 14, and the control processing unit 11 generates a pointer image according to the move command. By changing the position of the pointer graphic in the pointer image to be generated by the unit 24, the pointer graphic is moved rightward on the projection image. In the presentation, the presenter operates the cursor key of the remote controller 10 to move the pointer graphic on the projected image representing various materials, and the desired part of the presenter is indicated by the pointer graphic on the projected image. It is.

  The ROM 12 also associates the order of successive movement commands with the process of continuously changing the position of the pointer graphic on the projection image so that the locus of the pointer graphic draws a shape such as a circle or a straight line. Remember the table. Thus, the ROM 12 functions as a storage unit in the present invention.

  FIG. 3 is a conceptual diagram conceptually showing an example of the contents of the command table. FIG. 3 shows an example of the order of a predetermined movement command and processing in which the position of the pointer graphic is continuously changed along the direction of the arrow in the figure. The hatched circles in the figure indicate the locus of the pointer graphic whose position has been changed. In the example of FIG. 3, a process in which the locus of the pointer graphic becomes a circle is associated with the order of the upper, right, lower, and left movement instructions, and the order of the movement instructions of the right, left, right, and left Thus, a process in which the pointer graphic moves back and forth in either direction and the locus becomes a straight line is associated. In addition, the process of making the locus of the pointer figure become elliptical is associated with the order of the movement commands of right, left, up, and down, and the locus of the pointer figure is associated with the order of the movement instructions of up, down, right, and left. Is associated with a process of making a rectangle.

  The control processing unit 11 is configured to execute processing recorded in the command table in accordance with a control program stored in the ROM 12. The remote controller 10 is provided with a stop key for the user to input a command to stop the process of continuously changing the position of the pointer graphic on the projection image. The control program stored in the ROM 12 includes a process to be executed by the control processing unit 11 when a predetermined command is received during the process of continuously changing the position of the pointer graphic.

  Next, processing executed by the projector of the present invention having the above configuration will be described. FIG. 4 is a flowchart showing a procedure of processing in which the projector 1 of the present invention displays a pointer graphic. The control processing unit 11 causes the pointer image generation unit 24 to generate a pointer image including a pointer graphic, and superimposes the image generated by the image generation unit 22 on the image forming panel 21 to form a pointer image including the pointer graphic. By projecting the image onto the screen S, a pointer graphic indicating an arbitrary point on the projected image is displayed on the projected image (S1). The control processing unit 11 waits for reception of various commands when the user operates the remote controller 10 or the operation unit 15 while displaying the pointer graphic (S2).

  If no instruction is received (S2: NO), the control processing unit 11 measures the time elapsed since the last instruction was received and determines whether or not a predetermined time has elapsed since the last instruction was received. (S3). If the predetermined time has not yet elapsed (S3: NO), the control processing unit 11 returns the process to step S2 and continues waiting for an instruction to be received. If a predetermined time has elapsed since the last instruction was received (S3: YES), the control processing unit 11 changes the pointer graphic to another graphic having a different size, shape, color, etc. (S4), and performs the process. Return to step S2.

  FIG. 5 is a schematic diagram illustrating an example of a pointer graphic. FIG. 5A shows a dotted pointer graphic. The projector 1 displays the pointer graphic shown in FIG. 5A in red, for example, and points to an arbitrary part on the projection image. FIG. 5B shows a pointer graphic with an increased size, and FIG. 5C shows a cubic pointer graphic. The control processing unit 11 stores image data of these pointer graphics, and changes the pointer graphics on the projection image by changing the pointer graphics included in the pointer image generated by the pointer image generation unit 24. When the pointer graphic is stopped for a long time, the pointer graphic as shown in FIG. 5 (a) is changed to a pointer graphic having a different size or shape as shown in FIG. 5 (b) or (c). This makes it easier to visually recognize the pointer graphic. The control processing unit 11 performs processing for changing to pointer graphics other than those shown in FIG. 5, such as pointer graphics whose colors have been changed, pointer graphics having other shapes such as arrows or fingers, or pointer graphics made of moving images. May be.

  When an instruction is received in step S2 (S2: YES), the control processing unit 11 determines whether or not the received instruction is an end instruction that instructs to end image projection (S5). When the received command is an end command (S5: YES), the control processing unit 11 ends the process of projecting the image by a process such as causing the image forming panel 21 to end the image formation.

  If the instruction is not an end instruction in step S5 (S5: NO), the control processing unit 11 stores the received instruction in the command memory 13 (S6). The command memory 13 is a memory that stores a plurality of received instructions in a first-in first-out manner, and stores at least four instructions in the order in which they are received. Next, the control processing unit 11 refers to the stored contents of the command memory 13 and determines whether or not the order of a plurality of recently received instructions is the order of instructions included in the command table stored in the ROM 12. (S7). When the order of a plurality of recently received instructions is not included in the command table (S7: NO), the control processing unit 11 executes a process according to the received instruction (S8), and returns the process to step S2. . For example, when the received command is a command to move to the right, the control processing unit 11 executes a process of moving the pointer graphic to the right on the projection image. When the order of a plurality of recently received instructions is included in the command table (S7: YES), the control processing unit 11 creates a pointer graphic associated with the command table in the order of the plurality of recently received instructions. A process of continuously changing the position of the pointer graphic so that the locus draws a predetermined shape is executed (S9).

  FIG. 6 is a chart showing a specific example of the processing of steps S6 to S9. In FIG. 6, the commands received by the remote control receiver 14 or the operation unit 15 are shown in order, and the determination result in step S7 and the processing contents of the control processing unit 11 are shown corresponding to each command. Assume that the commands shown in FIG. 6 are received in order from top to bottom. When an upward movement command is first received, no other command is stored in the command memory 13, the determination result is NO, and the control processing unit 11 performs processing for moving the pointer graphic upward. Next, when a left movement command is received, the order of the upper and left movement commands is not included in the command table, the determination result is NO, and the control processing unit 11 displays a pointer graphic according to the left movement command. Process to move to the left. When a left move command is received after an up, right, and down move command is received, the order of the up, right, down, and left move commands is included in the command table shown in FIG. Is YES. Since the order of the movement command of the upper, right, lower, and left is associated with the process in which the locus of the pointer graphic becomes a circle, the control processing unit 11 causes the pointer graphic to draw a circle in the locus of the pointer graphic. The process which changes continuously the position on the projection image is performed.

  In this way, in step S9, as in the example shown in FIG. 3, the trajectory of the pointer graphic draws a predetermined shape associated with the order of received instructions, such as a circle, a straight line, an ellipse, or a rectangle. The control processing unit 11 continuously changes the position of the pointer graphic on the projection image. By moving the pointer graphic so as to surround a specific portion on the projection image such as a circle, an ellipse, or a rectangle, the specific portion on the projection image can be emphasized. Further, when a projection image representing a document is projected, a specific line in the document represented by the projection image can be emphasized by repeatedly moving the pointer graphic in the horizontal direction under the specific line. .

  In step S9, the control processing unit 11 performs a process of temporarily displaying a graphic indicating the range of the shape drawn by the locus of the pointer graphic around the position of the original pointer graphic. FIG. 7 is a schematic diagram illustrating a display example of processing for continuously changing the position of the pointer graphic so that the locus of the pointer graphic draws a circle. A point-like pointer graphic shown in FIG. 7A is displayed, and then a large circle pointer graphic shown in FIG. 7B is displayed around the position of the original pointer graphic. In addition, as shown in FIG. 7C, the position of the dotted pointer graphic is continuously changed so as to draw a circle having the same size as the circle of FIG. 7B. By performing such processing, it becomes easy to recognize the part pointed by the pointer graphic on the projection image. The control processing unit 11 performs the same processing when the pointer graphic trace draws another shape such as an ellipse or a rectangle. In step S9, the control processing unit 11 may perform a process of changing the position of the pointer graphic based on the position of the original pointer graphic.

  While executing the process of continuously changing the position of the pointer graphic in step S9, the control processing unit 11 waits for reception of various commands by the user operating the remote controller 10 or the operation unit 15 (S10). . If no instruction is received (S10: NO), the control processing unit 11 continues to wait for the instruction. When the command is received (S10: YES), the control processing unit 11 instructs the stop of the process of continuously changing the position of the pointer graphic due to the user pressing the stop key of the remote controller 10 or the like. It is determined whether or not (S11). When the received command is not a stop command (S11: NO), the control processing unit 11 executes a process corresponding to the received command (S12).

  In step S12, for example, when a movement command is received while executing a process of continuously changing the position of the pointer graphic, a process of moving the shape drawn by the locus of the pointer graphic is performed. In other words, when the user presses the right cursor key 10b of the remote controller 10 while the pointer graphic trace is drawing a circle, the circle drawn by the pointer graphic trace moves to the right. For example, the control processing unit 11 performs a process of changing the size of the shape drawn by the locus of the pointer graphic. FIG. 8 is a schematic diagram illustrating an example in which the size of a circle drawn by the locus of the pointer graphic is changed. FIG. 8A shows a state in which the locus of the pointer graphic is drawing a small circle, and FIG. 8B shows a state in which the circle of the pointer graphic is drawing a larger circle. For example, the control processing unit 11 changes the size of the shape drawn by the locus of the pointer graphic when receiving an instruction to change the volume while executing the process of continuously changing the position of the pointer graphic. Process. That is, when the user presses a volume increase key (not shown) of the remote controller 10 while the pointer graphic locus is drawing a circle as shown in FIG. 8A, the circle drawn by the pointer graphic locus is shown in FIG. It becomes a big circle as shown in. When the process is not particularly associated with the received command, the control processing unit 11 does not perform the process. After step S12 is completed, the control processing unit 11 returns the process to step S10.

  If the received instruction is a stop instruction in step S11 (S11: YES), the control processing unit 11 stops the process of continuously changing the position of the pointer graphic (S13), and the process proceeds to step S2. return. Note that the control processing unit 11 continuously changes the position of the pointer graphic when a predetermined time has elapsed after starting the process of continuously changing the position of the pointer graphic without receiving a stop command. Processing may be stopped. Moreover, the control process part 11 may perform the process which stops the process which changes the position of a pointer figure continuously, when the command in which a process is not matched at step S11 is received.

  As described above in detail, the projector 1 of the present invention projects so that the locus of the pointer graphic draws a predetermined shape such as a circle or a straight line when a predetermined command is continuously received in a predetermined order. A process of continuously changing the position of the pointer graphic on the image is performed. A presenter who makes a presentation using the projector 1 inputs a predetermined command in a predetermined order using the remote controller 10 to draw a predetermined shape such as a circle or a straight line on the pointer graphic on the projection image. it can. When the pointer graphic draws a shape such as a circle or a straight line at a specific portion on the projection image, the specific portion on the projection image is emphasized. That is, the presenter can easily emphasize a desired portion on the projected image with the same operability as when operating the laser pointer by hand.

  Also, during the presentation, the presenter mainly operates the cursor keys among the keys of the remote controller 10, so that a predetermined shape can be easily drawn on the locus of the pointer figure by operating the cursor keys that the presenter is familiar with. Can be made. Further, since the pointer graphic that emphasizes a desired portion on the projected image is generated by the projector 1, the presenter is bothered by adjusting the position of the pointer as in the case of operating the laser pointer by hand. You can concentrate on your presentation.

  In the present embodiment, the example in which the order of the predetermined movement command is associated with the process of continuously changing the position of the pointer graphic on the projection image has been shown. However, the present invention is not limited to this, and the order of instructions other than the movement instruction may be associated with the process of continuously changing the position of the pointer graphic on the projection image. That is, it is possible to perform a process of continuously changing the position of the pointer graphic on the projection image when the user presses a key other than the cursor key of the remote controller 10 in a predetermined order. is there.

  In the present embodiment, the command memory 13 stores the command received by the remote control receiving unit 14 when the user operates the remote control 10. However, the projector 1 of the present invention uses the remote control 10 to execute the command. The table and the received instruction may be stored. In the case of this form, instructions input by the user are sequentially stored in the remote controller 10, and when the order of received instructions is included in the command table, the remote controller 10 performs processing associated with the order of received instructions. The control processing unit 11 executes processing in accordance with the command received by the remote control receiving unit 14. Further, the projector 1 according to the present invention has a configuration in which the order of commands input by the user operating the operation unit 15 is associated with the process of continuously changing the position of the pointer graphic on the projection image. May be. Even in the case of these forms, the projector 1 can execute the present invention.

It is a block diagram which shows the function structure inside the projector of this invention. It is a schematic diagram which shows a part of remote control. It is the conceptual diagram which showed the example of the content of the command table notionally. It is a flowchart which shows the procedure of the process in which the projector of this invention displays a pointer figure. It is a schematic diagram which shows the example of a pointer figure. It is a graph which shows the specific example of the process of step S6 to S9. It is a schematic diagram which shows the example of a display of the process which changes the position of a pointer figure continuously so that the locus | trajectory of a pointer figure may draw a circle. It is a schematic diagram which shows the example by which the magnitude | size of the circle which the locus | trajectory of a pointer figure draws was changed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector 10 Remote control 11 Control processing part 12 ROM (storage means)
13 Command memory (temporary storage means)
14 Remote control receiver (reception means)
15 Operation part (reception means)
21 Image forming panel 24 Pointer image generator

Claims (8)

In a projector that projects an image and displays a pointer graphic on the image indicating an arbitrary part on the projected image.
A projector comprising means for continuously changing the position of the pointer graphic on the image so that the locus of the pointer graphic draws a predetermined shape. In a projector provided with a means for projecting an image, displaying a pointer graphic pointing to an arbitrary part on the projected image on the image, and receiving means for receiving a plurality of commands,
When the receiving unit continuously receives a predetermined command in a predetermined order, the position of the pointer graphic on the image is continuously changed so that the locus of the pointer graphic draws a predetermined shape. A projector characterized by comprising processing means for performing the processing. In a projector provided with a means for projecting an image, displaying a pointer graphic pointing to an arbitrary part on the projected image on the image, and receiving means for receiving a plurality of commands,
Corresponding sequence of predetermined instructions that can be received by the receiving means is associated with processing for continuously changing the position of the pointer graphic on the image so that the locus of the pointer graphic draws a predetermined shape Storage means for storing
Temporary storage means for storing a plurality of instructions received in the order received by the reception means;
Means for determining whether or not the order of the plurality of instructions stored in the temporary storage means matches the order of the predetermined instructions stored in the storage means when the accepting means accepts an instruction;
Processing means for executing processing associated with the order of the predetermined instructions when it is determined that the order of the plurality of instructions stored in the temporary storage means matches the order of the predetermined instructions stored in the storage means A projector comprising: and.   Means for executing processing in accordance with the instruction received by the receiving means when it is determined that the order of the plurality of instructions stored in the temporary storage means does not match the order of the predetermined instructions stored in the storage means; The projector according to claim 3, further comprising:   5. The projector according to claim 2, wherein the command is a command for instructing to move the pointer graphic in any direction on the image. 6. Means for timing the time elapsed since the receiving means last received the command;
The projector according to any one of claims 2 to 5, further comprising means for changing the pointer graphic when the time counted by the means exceeds a predetermined time.   The projector according to claim 2, further comprising means for changing a position or size of a predetermined shape drawn by the locus of the pointer graphic.   The said processing means is comprised so that the figure which shows the range which changes the position of the said pointer figure continuously may be once displayed on an image, The Claim 1 thru | or 7 characterized by the above-mentioned. Projector.

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