JP2011221546A - Data processing apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To temporarily stop unnecessary image projection without imposing any burden on a user.SOLUTION: A projection system includes a personal computer (PC) 1 that outputs image data and a data projector device 2 that is connected with the PC 1 and projects and displays an image based on the input image data. The PC1 sends a signal instructing release or setting of image mute at a timing when a specified operation state is entered (T02 to T04, T05 to T07), and the data projector device 2 temporarily stops projecting and displaying the image in accordance with an instruction signal sent from the PC1 (R02 to R07).

Description

  The present invention relates to a projection system, a data processing apparatus, a projection method, and a program suitable for presentation, for example, by connecting a projector apparatus to a personal computer or the like.

  Recently, while personal computers are becoming more common, portable data projector devices using liquid crystal panels, micromirror devices, etc. as image display elements have become widespread, connecting these personal computers and data projector devices, By executing presentation software on a personal computer and projecting and displaying it on a projector device, it is possible to more easily express a presentation more easily.

  When the presentation software is executed on the personal computer and projected on the projector device in this way, the screen content of the personal computer at that time is projected and displayed as it is on the projector device.

  Therefore, if the user decides that the projection will get in the way depending on the situation at the time of presentation, the projection of the image is temporarily stopped as necessary, and more specifically, by displaying the “black image”, While maintaining light emission from the light source lamp, it is necessary to stop projection in a pseudo manner, and is generally known as a “mute” function of a projected image. The following technologies are considered.

  That is, this technique provides an image display light modulation element, a lamp that illuminates the light modulation element, and a lamp cooling lamp to provide a projector that further enhances the effect of the image mute function or the A (audio) / V (image) mute function. In an image display device having a fan, the display screen of the image display device is hidden or set to a predetermined display, and the setting by the image mute device and the cancellation of the setting Lamp output brightness adjusting means for adjusting the output brightness of the lamp is provided. (For example, Patent Document 1)

JP 2003-280087 A

  However, including the technique disclosed in Patent Document 1, the setting and cancellation of the mute operation of the projected image are both performed by the user's key operation. If necessary key operation is delayed or the key operation is forgotten. If this is the case, it is a matter of course that an image that the user does not want to project is projected and displayed on the screen screen.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to temporarily stop projection of an image that seems unnecessary, without imposing any burden on the user. A projection system, a data processing apparatus, a projection method, and a program.

  The invention according to claim 1 is a projection system in which a data processing device that outputs image data and a projection device that performs projection display based on input image data are connected, and the data processing device includes: Transmitting means for transmitting a signal for instructing cancellation and setting of image muting at a timing when a specific operating state is reached, and the projection apparatus responds to an instruction signal sent from the data processing apparatus by the transmitting means. A projection system comprising image mute control means for temporarily stopping projection display of an image.

  According to a second aspect of the present invention, in the first aspect of the invention, the specific operation state is activation and termination of specific application software.

  According to a third aspect of the invention, in the first aspect of the invention, the specific operation state is whether or not specific application software is active.

  The invention according to claim 4 is the invention according to claim 2 or 3, wherein the specific application software is presentation software.

  The invention according to claim 5 is a data processing apparatus for outputting image data, which is connected to a projection apparatus that performs projection display based on input image data and constitutes a projection system, and is in a specific operation state. And a mute control unit for temporarily stopping output of image data in accordance with a determination result of the determination unit. .

  The invention described in claim 6 is a projection method executed by a projection system in which a data processing device that outputs image data and a projection device that performs projection display based on input image data are connected. The data processing device has a transmission step of transmitting a signal instructing to cancel and set the image mute at a timing when the specific operation state is reached, and the projection device is sent from the data processing device in the transmission step. An image mute control step for temporarily stopping projection display of an image in response to an instruction signal is provided.

  The invention according to claim 7 is a projection method executed by a data processing apparatus for outputting image data, which is connected to a projection apparatus that performs projection display based on input image data and constitutes a projection system. A determination step for determining whether to cancel and set the image mute at the timing when the specific operation state is reached, and an image mute control step for temporarily stopping the output of the image data in accordance with the determination result in the determination step. It is characterized by that.

  The invention described in claim 8 is incorporated in each apparatus, which is executed by a projection system in which a data processing apparatus that outputs image data and a projection apparatus that performs projection display based on input image data are connected. A program executed by the computer, wherein the data processing device transmits a transmission step for transmitting a signal instructing to cancel and set an image mute at a timing when a specific operation state is reached, A computer having a built-in image mute control step for temporarily stopping projection display of an image in response to an instruction signal sent from the data processing device in the sending step is characterized.

  The invention according to claim 9 is a program executed by a computer incorporated in a data processing apparatus for outputting image data, which is connected to a projection apparatus that performs projection display based on input image data and constitutes a projection system. A determination step for determining whether to cancel and set the image mute at the timing when the specific operation state is reached, and an image mute control step for temporarily stopping the output of the image data in accordance with the determination result in the determination step And making the computer execute.

  According to the first aspect of the present invention, it is possible to temporarily stop the projection of an image that seems unnecessary according to the operating state of the specific application software without imposing any burden on the user.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the mute state of the image can be more accurately switched according to the activation and termination of the specific application software.

  According to the third aspect of the present invention, in addition to the effect of the first aspect of the invention, the mute state of the image can be further improved at an accurate timing in accordance with the actual processing contents in the data processing apparatus in the multitask environment. It can be switched accurately.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 2 or 3, it is ensured that an unnecessary image is shown to a customer who becomes a viewer, especially when giving a presentation. Can be prevented.

  According to the fifth aspect of the present invention, it is possible to temporarily project an image which is unnecessary according to the operation state of the specific application software by controlling the data processing device alone without imposing any burden on the user. It can be stopped.

  According to the sixth aspect of the present invention, it is possible to temporarily stop the projection of an image that seems unnecessary according to the operation state of the specific application software without imposing any burden on the user.

  According to the seventh aspect of the present invention, it is possible to temporarily project an image that is considered unnecessary according to the operation state of specific application software by controlling the data processing device alone without imposing any burden on the user. It can be stopped.

  According to the eighth aspect of the present invention, it is possible to temporarily stop the projection of an image that seems unnecessary according to the operating state of the specific application software without imposing any burden on the user.

  According to the ninth aspect of the present invention, an image which is considered unnecessary according to the operation state of specific application software is temporarily projected by controlling the data processing apparatus alone without imposing any burden on the user. It can be stopped.

The figure which shows the two types of system connection which concerns on one Embodiment of this invention. FIG. 2 is an exemplary block diagram showing a functional circuit configuration of the personal computer according to the embodiment. The block diagram which shows the functional circuit structure of the data projector apparatus which concerns on the same embodiment. The flowchart which shows the 1st process content at the time of presentation software execution based on the embodiment. The flowchart which shows the 2nd processing content at the time of presentation software execution based on the embodiment.

  Hereinafter, a case where the present invention is applied to a projection system in which a personal computer (PC) 1 and a data projector apparatus 2 are connected will be described with reference to the drawings.

  In the present embodiment, it is assumed that two types of methods for connecting the personal computer 1 and the data projector device 2 can be selected: a method using a wireless LAN connection and a method using an RGB cable connection.

  FIG. 1A illustrates a first connection state in which the personal computer 1 and the data projector apparatus 2 are connected by wireless LAN connection. Here, for example, the IEEE802.11b standard (or IEEE802.11a / 802.11g) is used. The personal computer 1 sends moving image data and a signal for mute control, which will be described later, to the data projector apparatus 2.

  The data projector 2 projects image data according to the contents sent from the personal computer 1 or a mute image in which the entire screen turns black while light is emitted from the internal light source lamp, and also sounds from the built-in speaker unit. Sounds out loud.

  FIG. 1B illustrates a second connection state in which the personal computer 1 and the data projector device 2 are connected by the RGB cable 3. Here, the personal computer 1 and the data projector are connected via the RGB cable 3. While moving image data is transmitted to the apparatus 2, a mute control signal (to be described later) is transmitted by an infrared (Ir) modulation signal such as the IrDA standard.

  1A and 1B, the personal computer 1 uses the recording medium attached to the data projector device 2, for example, a CD-ROM, for the data projector device 2. In order to control the mute operation of the image while sending the image data to the data projector apparatus 2 when executing a specific application program, for example, presentation software, by executing the program. Is output to the data projector apparatus 2.

  FIG. 2 explains the configuration of the personal computer 1. FIG. 2 shows a hardware configuration of the personal computer 1, and a north bridge 12 is connected to the CPU 11 that controls various processes and a front side bus FSB.

  The north bridge 12 is further connected to the main memory 13 via the memory bus MB and to the graphic controller 14 and the graphic memory 15 via the graphics interface AGP, and is also connected to the south bridge 16 mainly between them. Execute I / O control.

  The south bridge 16 is connected to a PCI bus 17, a keyboard / mouse 18, a video encoder 19, a wireless LAN interface (I / F) 20, an Ir transmission / reception unit 21, and a hard disk device (HDD) 22. Input / output control with 12 is performed.

  It should be noted that the individual elements constituting the personal computer 1 are extremely general techniques, and therefore description thereof is omitted.

  Note that the video encoder 19 generates and outputs an RGB video signal, which is an analog value image signal, from the given digital value image signal.

  The wireless LAN interface 20 transmits / receives various data in accordance with the above-mentioned IEEE802.11b standard by transmitting / receiving, for example, 2.4 [GHz] band radio waves via the wireless antenna 23.

  It is assumed that the hard disk device 22 stores in advance the driver software for the data projector device 2 together with the OS (operating system), various application programs, and data files.

Next, the circuit configuration of the data projector device 2 will be described with reference to FIG.
In the figure, image signals of various standards input from the input / output connector unit 31 are unified into image signals of a predetermined format by the image conversion unit 33 via the input / output interface (I / F) 32 and the system bus SB. Later, it is sent to the projection encoder 34.

  The projection encoder 34 develops and stores the transmitted image signal in the video RAM 35, generates a video signal from the stored contents of the video RAM 35, and outputs the video signal to the projection drive unit 36.

  The projection driving unit 36 appropriately speeds up time division by multiplying a frame rate, for example, 60 [frames / second], for example, the number of color component divisions and the number of display gradations corresponding to the transmitted image signal. For example, a micromirror element 37 which is a spatial light modulation element (SOM) is driven to display.

  High-luminance white light emitted from the light source lamp 39 disposed in the reflector 38 is appropriately colored to the primary color via the color wheel 40 with respect to the micromirror element 37, and the luminance distribution is made uniform by the light tunnel 41. After that, when the light is totally reflected by the mirror 42 and irradiated, an optical image is formed by the reflected light, and is projected and displayed on a screen (not shown) through the projection lens 43.

  However, both the lighting driving of the light source lamp 39 and the motor (M) 44 that rotationally drives the color wheel 40 operate based on the supply voltage value from the projection light processing unit 45.

  The control unit 46 controls all the operations of the circuits. The control unit 46 includes a CPU, a nonvolatile memory that stores an operation program executed by the CPU during a projection operation, a work memory, and the like.

  The control unit 46 is also connected to a wireless LAN interface (I / F) 47, a distance measurement processing unit 48, and an audio processing unit 49 via the system bus SB.

  The wireless LAN interface 47 transmits and receives various data according to the above-mentioned IEEE802.11b standard by transmitting and receiving, for example, 2.4 [GHz] band radio waves via the wireless antenna 50.

  The distance measurement processing unit 48 controls and drives a distance measurement sensor 51 including two pairs of phase difference sensors embedded so as to be orthogonal to each other in the vicinity of the projection lens 43 on the front surface of the housing of the data projector device 2 and to detect them. The distance from the output to an arbitrary point position is calculated, and the calculated distance value data is sent to the control unit 46.

  The sound processing unit 49 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker 52 to emit a loud sound, or generates a beep sound or the like as necessary.

  In the data projector device 2, each key operation signal in the key switch (SW) unit 53 provided on the upper surface of the housing is directly input to the control unit 46, and a signal from the Ir reception unit 54 is also directly controlled by the control unit 46. Is input. The Ir receiving unit 54 receives an operation signal from a remote controller (not shown) attached to the data projector device 2 or an IrDA standard from an external device through Ir receiving window portions provided on the front and rear surfaces of the housing of the data projector device 2. Infrared modulated signal is received, and the received signal is converted into a code signal and sent to the control unit 46.

Next, a first operation example of the above embodiment will be described.
FIG. 4 exemplifies a first operation example in the first connection state shown in FIG. 1A. The operation control is performed by the CPU 11 on the personal computer 1 side and the control unit on the data projector device 2 side. 46 respectively execute.

  In the data projector device 2, after turning on the power, after performing various initial settings including the start of lighting of the light source lamp 39 and the search of the input image signal (step R 01), the contents of the input image data are changed. Regardless, the mute setting of the projected image is performed so that the entire screen is black (step R02).

  In this image mute state, the wireless LAN interface 47 is used to search whether or not an instruction signal for releasing the image mute is input from the personal computer 1 via the wireless LAN (step R03). As a result, it is determined whether or not the instruction signal has been received (step R04).

  If it is determined that it has not been received, the process returns to the process from step R02 again, and the process of steps R02 to R04 is repeated in the same manner as described above to instruct the personal computer 1 to cancel the image mute state. Wait for the signal to be input.

  On the other hand, the personal computer 1 is connected to the data projector device 2 by wireless LAN via the wireless LAN interface 20 and the wireless antenna 23, and also includes application software for mute control included in the driver software of the data projector device 2. Is activated (step T01).

  Next, the operating state of application software specified in advance, here, the presentation software is acquired (step T02), and it is determined whether or not the application software has been activated (step T03).

  Only when it is determined that the presentation software has been activated, an instruction signal for canceling the image mute state is transmitted to the data projector device 2 via the wireless LAN prior to outputting the image data based on the presentation software ( Step T04).

  Thereafter, it is determined whether or not the presentation software has been terminated (step T05).

  Only when it is determined that the presentation software has been terminated, the output of the image data based on the presentation software is stopped, and an instruction signal for newly setting the image mute state is sent to the data projector apparatus 2 via the wireless LAN. The call is transmitted via (step T06).

  Next, the wireless LAN interface 20 confirms that the wireless LAN connection with the data projector apparatus 2 has not been disconnected (step T07), and the processing from step T02 is repeated again.

  If it is determined here that the wireless LAN connection with the data projector apparatus 2 is disconnected, an application program for controlling the image mute of the data projector apparatus 2 is processed at that time.

  On the other hand, on the side of the data projector apparatus 2 that receives the image data and the like from the personal computer 1 via the wireless LAN, the instruction signal for canceling the image mute from the personal computer 1 transmitted in the process of step T04 is sent to the step. When it is received by the search in R03, the reception is confirmed in the subsequent step R04, the state of the image mute that has been set so far is stopped, and the state in which the input image data is projected and displayed from the projection lens 43 is shifted. (Step R05).

  Here, in the data projector device 2, while maintaining the projected display state of the input image data, an instruction signal for setting the image mute from the personal computer 1 via the wireless LAN is separated from the image data. The wireless LAN interface 47 is used to search whether or not it has been input (step R06), and it is determined whether or not the instruction signal has been received as a result of the search (step R07).

  If it is determined that the image has not been received, the process returns to the process from step R05 again. Thereafter, the processes of steps R05 to R07 are repeated in the same manner as described above to set the image mute state from the personal computer 1. Wait for the signal to be instructed to be input.

  Then, when the instruction signal for setting the image mute sent from the personal computer 1 sent in the process in step T06 is received by the search in step R06, the reception is confirmed in the subsequent step R07 and canceled until then. The image mute state that has been set is stopped, and the process returns to step R02 again to set the image mute state.

  In this way, an unnecessary image is projected according to the operating state of specific application software, for example, presentation software, without placing any burden on the user who uses the personal computer 1 and the data projector device 2. The image mute operation can be switched and set to be temporarily stopped.

  In particular, in the first operation example, since the image mute state is switched according to the start and end of the presentation software that is the specific application software, when the personal computer 1 is operated in a single task or a form close thereto, The state of image mute can be switched more accurately.

Next, a second operation example of the above embodiment will be described.
FIG. 5 exemplifies a second operation example in the second connection state shown in FIG. 1B. The operation control is performed by the CPU 11 on the personal computer 1 side and the control unit on the data projector apparatus 2 side. 46 respectively execute.

  In the data projector device 2, after turning on the power, after performing various initial settings including starting the light emission of the light source lamp 39 and searching for an input image signal (step R 51), the contents of the input image data are changed. Regardless, the mute setting of the projected image is performed so that the entire screen is black (step R52).

  In this image mute state, the Ir receiver 54 searches whether an instruction signal for releasing the image mute is input from the personal computer 1 in the form of an infrared modulation signal different from the image data (step R53). It is determined whether the instruction signal has been received as a result of the search (step R54).

  If it is determined that the image has not been received, the process returns to the process from step R52 again, and the process of steps R52 to R54 is repeated in the same manner as described above, thereby instructing the personal computer 1 to cancel the image mute state. Wait for the signal to be input.

  One personal computer 1 is connected to the data projector device 2 via the RGB cable 3 and sends an analog RGB video signal from the video encoder 19, and is also included in the driver software of the data projector device 2. Application software for mute control is activated (step T51).

  Next, the operating state of the application software specified in advance, here, the presentation software is acquired (step T52), and it is determined whether or not the application software is in an active state (step T53).

  Here, only when it is determined that the presentation software is in an active state in a multitasking environment, an instruction signal for releasing the image mute state prior to the output of the image data based on the presentation software is sent to the data projector apparatus 2. Is transmitted from the Ir transmitting / receiving unit 21 in the form of an infrared modulation signal (step T54).

  Thereafter, it is determined whether or not the application software other than the presentation software is in an active state in the same multitask environment (step T55).

  Only when it is determined that application software other than the presentation software is active, an instruction signal for newly setting the image mute state is sent from the Ir transmission / reception unit 21 to the data projector apparatus 2 in the form of an infrared modulation signal. Make a call (step T56).

  Next, after confirming that the termination of the application software for the mute control is not instructed (step T57), the processing from step T52 is repeated again.

  If it is determined here that the end of the application software for the mute control is instructed, an application program for controlling the image mute of the data projector device 2 is processed in accordance with the instruction.

  On the other hand, on the side of the data projector device 2 that receives the image data and the like from the personal computer 1 via the RGB cable 3 at the input / output connector unit 31, the image mute from the personal computer 1 transmitted in the process at step T54 is performed. When the instruction signal to be canceled is received by the search in step R53, the reception is confirmed in the subsequent step R54, the image mute state set up to that point is stopped, and the input image data is input to the projection lens 43. Then, the state shifts to a state for more projection display (step R55).

  Here, in the data projector device 2, while maintaining the projection display state of the input image data, this time, the instruction signal for setting the image mute in the form of an infrared modulation signal from the personal computer 1 is the image data. The Ir receiving unit 54 is used to search whether or not it has been separately input (step R56), and it is determined whether or not the instruction signal has been received as a result of the search (step R57).

  If it is determined that the image has not been received, the process returns to the process from step R55 again. Thereafter, the process of steps R55 to R57 is repeated in the same manner as described above to set the image mute state from the personal computer 1. Wait for the signal to be instructed to be input.

  When the instruction signal for setting the image mute transmitted from the personal computer 1 sent in the process in step T56 is received by the search in step R56, the reception is confirmed in the subsequent step R57 and canceled until then. The image mute state that has been set is stopped, and the process returns to step R52 again to set the image mute state.

  Thus, even when the personal computer 1 uses an OS (operating system) in a multitasking environment and is executing a plurality of application softwares at the same time, it can accurately cope with that environment, The image mute operation can be switched and set so as to temporarily stop projection of an image that seems unnecessary, depending on whether it is active or not, depending on the operation state of specific application software such as presentation software.

  In both the first and second operation examples, when presentation software is executed as specific application software, image muting is performed in order to avoid projection display in a state where an exceptional application is executed. Although the setting and release are switched, the present invention does not limit the specific application software to the presentation software, and it is needless to say that it can be applied to other specific application software as well.

  However, especially when an operator of such a system uses presentation software to make a presentation to a customer as a user, it is disadvantageous to the user by projecting unnecessary images compared to using other application software. Since there is a high possibility that this will occur, it is considered very useful to switch between setting and releasing the image mute according to the operating state of the presentation software as in the above embodiment.

  In the above embodiment, the case where the image mute control is performed has been described. However, in actual presentation software or the like, the audio data is transmitted from the personal computer 1 to the data projector apparatus 2 together with the image data, and the data projector apparatus 2 This is a loud sound report sound, and the sound mute may be similarly controlled in conjunction with the image mute.

  In the above embodiment, the image mute control operation is executed on the data projector apparatus 2 side in response to the instruction signal transmitted from the personal computer 1. However, the present invention is not limited to this, and the image mute is performed. The personal computer 1 itself, which is a data processing device, may temporarily stop outputting image data at the timing.

  In this case, the data projector apparatus 2 projects and displays a preset default screen (usually, for example, a blue-back screen whose entire surface is blue) when image data input is interrupted.

  Further, the personal computer 1 may output black image data in which the entire screen is black instead of temporarily stopping the output of the image data.

  In any of the above cases, it can be realized by the control processing of the personal computer 1 as a data processing apparatus alone, and it is necessary to perform special control on the data projector apparatus 2 side that performs actual projection display. Therefore, only the driver software of the data projector device 2 installed in the personal computer 1 can be used, and the realization thereof becomes extremely easy.

  In the above-described embodiment, the data processing apparatus that outputs image data is described as being the personal computer 1, but the present invention is not limited to this, and a PDA (Documents of various application software, etc.) can be viewed. It can be similarly realized even with a personal digital assistant (personal information portable terminal) or a cellular phone.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 1 ... Personal computer (PC), 2 ... Data projector apparatus, 3 ... RGB cable, 11 ... CPU, 12 ... North bridge, 13 ... Main memory, 14 ... Graphic controller, 15 ... Graphic memory, 16 ... South bridge, 17 ... PCI bus, 18 ... keyboard / mouse, 19 ... video encoder, 20 ... wireless LAN interface (I / F), 21 ... Ir transmission / reception unit, 22 ... hard disk device (HDD), 23 ... wireless antenna, 31 ... input / output connector unit 32 ... Input / output interface (I / F), 33 ... Image conversion unit, 34 ... Projection encoder, 35 ... Video RAM, 36 ... Projection drive unit, 37 ... Micromirror element (SOM), 38 ... Reflector, 39 ... Light source Lamp, 40 ... Color wheel, 41 ... Light tunnel, 42 Mirror, 43 ... Projection lens, 44 ... Motor (M), 45 ... Projection light processing unit, 46 ... Control unit, 47 ... Wireless LAN interface (I / F), 48 ... Ranging processing unit, 49 ... Audio processing unit, DESCRIPTION OF SYMBOLS 50 ... Wireless antenna, 51 ... Distance sensor, 52 ... Speaker, 53 ... Key switch (SW) part, 54 ... Ir receiving part, AGP ... Graphics interface, FSB ... Front side bus, MB ... Memory bus, SB ... System bus .

Claims (9)

A projection system in which a data processing device that outputs image data and a projection device that performs projection display based on input image data are connected,
The data processing device
A transmission means for transmitting a signal instructing to cancel and set the mute of the image at a timing when a specific operation state is reached,
The projection apparatus is
A projection system comprising image mute control means for temporarily stopping projection display of an image in response to an instruction signal sent from the data processing device by the transmission means.   2. The projection system according to claim 1, wherein the specific operation state is activation and termination of specific application software.   The projection system according to claim 1, wherein the specific operation state is whether or not specific application software is active.   4. The projection system according to claim 2, wherein the specific application software is presentation software. A data processing apparatus for outputting image data, which is connected to a projection apparatus that performs projection display based on input image data and constitutes a projection system,
A determination means for determining the cancellation and setting of the mute of the image at the timing when the specific operation state is reached,
A data processing apparatus comprising: an image mute control unit that temporarily stops outputting image data in accordance with a determination result by the determination unit. A projection method executed by a projection system in which a data processing device that outputs image data and a projection device that performs projection display based on input image data are connected,
The data processing device has a transmission step of transmitting a signal instructing to cancel and set the mute of the image at a timing when the specific operation state is reached,
The projection method according to claim 1, further comprising an image mute control step of temporarily stopping projection display of an image in response to an instruction signal sent from the data processing device in the transmission step. A projection method executed by a data processing apparatus for outputting image data, which is connected to a projection apparatus that performs projection display based on input image data and constitutes a projection system,
A determination step for determining the cancellation and setting of the mute of the image at the timing when the specific operation state is reached,
A projection method, comprising: an image mute control step of temporarily stopping output of image data in accordance with a determination result in the determination step. A program executed by a computer built in each device, executed by a projection system in which a data processing device that outputs image data and a projection device that performs projection display based on input image data are connected. There,
The data processing device includes a transmission step of transmitting a signal instructing to cancel and set the image mute at a timing when the specific operation state is reached.
The projection device causes a computer having a built-in image mute control step to temporarily stop projection display of an image in response to an instruction signal sent from the data processing device in the transmission step. . A program executed by a computer incorporated in a data processing device for outputting image data, which is connected to a projection device that performs projection display based on input image data and constitutes a projection system,
A determination step for determining whether to unmute and set the image at a specific operation state;
A program that causes a computer to execute an image mute control step of temporarily stopping output of image data in accordance with a determination result in the determination step.

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