Control method for display apparatus, control method for display system, display apparatus, and program

Abstract

To provide a highly convenient control method for a display apparatus.SOLUTION: A control method for a first projector 5 functioning as a display apparatus includes, when input of an image signal to the first projector 5 is detected, displaying, by the first projector 5, an image based on the image signal and, when the input of the image signal is not detected, executing calibration for the first projector 5.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a control method for a display device, a control method for a display system, a display device, and a program. [Background technology]

[0002] 2. Description of the Related Art Display devices that are installed in conference rooms or the like and that are connected to a user's computer or the like to display the user's presentation image or the like on a large screen such as a screen are known. As such a display device, Patent Document 1 discloses a display device capable of displaying image signals from various computers. In the display device of Patent Document 1, when a change occurs in the input image signal due to switching of the connected computer, automatic adjustment of the display settings is started. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP2006-154836A Summary of the Invention [Problem to be solved by the invention]

[0004] When automatic adjustment begins, use of the display device is restricted until the automatic adjustment is completed, which can impair the convenience of the display device user. For example, even if the user wants to display an image immediately, even if the display quality is somewhat poor, the user must wait until the automatic adjustment is completed. [Means for solving the problem]

[0005] A method for controlling a display device according to one embodiment of the present invention includes, when an input of an image signal to a display device is detected, causing the display device to display an image based on the image signal, and, when the input of the image signal is not detected, performing calibration of the display device.

[0006] A control method for a display system according to one embodiment of the present invention includes detecting an input of a first image signal to a first display device, detecting an input of a second image signal to a second display device, and, if the input of the first image signal is detected, causing the first display device to display a first image based on the first image signal, and, if the input of the second image signal is detected, causing the second display device to display a second image based on the second image signal, and, if the input of the first image signal and the input of the second image signal are not detected, performing calibration of the first display device and performing calibration of the second display device.

[0007] A display device according to one embodiment of the present invention includes a first circuit that detects input of an image signal, a display panel that displays an image based on the image signal when the input of the image signal is detected, and a second circuit that performs calibration when the input of the image signal is not detected.

[0008] A program according to one aspect of the present invention includes executing calibration of a display device when input of an image signal to the display device is not detected. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing an example of installation of a multi-projection system according to a first embodiment. [Diagram 2] FIG. 1 is a block diagram showing an example of the configuration of a multi-projection system. [Diagram 3] 11 is a flowchart showing a procedure for automatic adjustment. [Figure 4]FIG. 11 is a block diagram showing an example of the arrangement of a multi-projection system according to a second embodiment. [Diagram 5] FIG. 11 is a block diagram showing an example of the configuration of a projector according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1. Embodiment 1 1.1.Multi-projection system configuration The configuration of a multi-projection system 1 as a display system will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a schematic diagram showing an example of installation of the multi-projection system according to this embodiment, and Fig. 2 is a block diagram showing an example of the configuration of the multi-projection system according to this embodiment.

[0011] 1, the multi-projection system 1 includes a first projector 5 as a display device or a first display device, and a second projector 6 as a second display device. The multi-projection system 1 is connected or arranged with an image signal output device 2 such as a user's computer, a screen 3 that displays images from the first projector 5 and the second projector 6, a transmission cable 4 such as a MIDI (Musical Instrument Digital Interface) cable or a computer cable, an antenna 7a for connecting to a wireless LAN (Local Area Network) access point 8a, and the like.

[0012] The image signal output device 2 outputs an image signal to the first projector 5 and the second projector 6. In this embodiment, the image signal output device 2 is a user's computer. The image signal output device 2 may be a smartphone, a set top box (STB), a digital versatile disc (DVD) player, or a media server on a network connected via an access point 8a. The image signal from the image signal output device 2 may be sent to the first projector 5 and the second projector 6 via a wireless local area network (LAN) or a wired LAN.

[0013] This multi-projection system 1 is a system that displays high-resolution, large-screen images using a tiling display. In the multi-projection system 1, image light of a divided image 5A displayed by a first projector 5 and image light of a divided image 6A displayed by a second projector 6 are horizontally aligned in parallel and projected onto a screen 3, and a whole image 11 is formed and displayed by partially overlapping the images on the screen 3. In this embodiment, a multi-projection system 1 is illustrated as being configured to project the divided image 5A of the first projector 5 and the divided image 6A of the second projector 6 in parallel in the horizontal direction, but this is not limited to this. For example, the configuration may be such that divided images from three or more projectors are parallel in the horizontal or vertical direction to display the overall image 11.

[0014] As shown in FIG. 2, in this embodiment, the first projector 5 and the second projector 6 have the same configuration. When performing automatic adjustment, one of the projectors becomes the primary projector and the remaining projectors become secondary projectors. Which projector is to be the primary projector can be set in advance, or it can be programmed so that the projector that is first turned on becomes the primary projector. The primary projector controls the secondary projector to control the automatic adjustment of the multi-projection system 1. The automatic adjustment is an example of calibration.

[0015] The first projector 5 and the second projector 6 each include an image signal input unit 12, a no-signal detection unit 13, an image signal processing unit 14, a projection unit 20, an automatic adjustment unit 15, a camera 16, a memory unit 17, an operation signal receiving unit 18, a remote control 19, a communication unit 7, and a control unit 10.

[0016] The image signal input unit 12 receives an image signal from the image signal output device 2 and outputs the input image signal to the image signal processing unit 14. The image signal input unit 12 is configured to include, for example, input terminals and interface circuits for connecting to various cables.

[0017] No-signal detection unit 13 as a first circuit detects an input of an image signal to image signal input unit 12 based on a request from control unit 10, and outputs detection information to control unit 10. No-signal detection unit 13 is configured to include, for example, a circuit that detects the input of an image signal. No-signal detection unit 13 may be configured integrally with an interface circuit included in image signal input unit 12.

[0018] Note that no-signal detector 13 may be configured to output the information as detection information to controller 10 only when it detects that an image signal is input, in other words, only when it does not detect that there is no image signal input. Alternatively, no-signal detector 13 may be configured to output the information as detection information to controller 10 only when it detects that there is no image signal input, in other words, only when it does not detect that there is an image signal input. In either case, controller 10 can distinguish between a case where an image signal input is detected and a case where an image signal input is not detected.

[0019] For example, if the no-signal detection unit 13 is configured to output that information to the control unit 10 as detection information only when it detects that no image signal is being input, the control unit 10 can determine that no image signal is being detected when detection information is output from the no-signal detection unit 13, and on the other hand, can determine that input of an image signal is being detected when detection information is not output from the no-signal detection unit 13.

[0020] On the other hand, if the no-signal detection unit 13 is configured to output that information to the control unit 10 as detection information only when it detects that an image signal is input, the control unit 10 can determine that an image signal has been detected when detection information is output from the no-signal detection unit 13, and can determine that an image signal has not been detected when detection information is not output from the no-signal detection unit 13.

[0021] The image signal processing unit 14 adjusts the image signal based on the adjustment parameters stored in the storage unit 17 , and outputs the adjusted image signal to the projection unit 20 .

[0022] The projection unit 20 includes a light source 21 such as a laser light source, an optical engine 22 including display elements such as a liquid crystal panel or a DMD (Digital Micromirror Device), and a projection optical system 23 including a lens system, and displays an image based on an image signal from the image signal processing unit 14 on the screen 3. Here, the optical engine 22 is an example of a display panel.

[0023] Automatic adjustment unit 15, which serves as a second circuit, performs automatic adjustment relating to image display based on an automatic adjustment program. During automatic adjustment, the camera 16 captures an adjustment pattern image as a display image to be displayed on the screen 3 and outputs the image to the automatic adjustment unit 15 .

[0024] While analyzing the pattern image captured by the camera 16, the automatic adjustment unit 15 modifies the adjustment parameters so that the pattern image becomes a specified display image, and when the adjustment is completed, the modified adjustment parameters are stored in the memory unit 17. The image signal processing unit 14 and the automatic adjustment unit 15 are configured, for example, by integrated circuits. The integrated circuits include LSI (Large-Scale Integration), SOC (system on a chip), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), FPGA (Field Programmable Gate Array), etc. Furthermore, an analog circuit may be included as part of the configuration of the integrated circuit, and the integrated circuit may be configured to be combined with the control unit 10.

[0025] The adjustments performed by the automatic adjustment unit 15 are mainly adjustments for overlay misalignment, color variation, and brightness variation. In addition, frame alignment adjustment and keystone correction may be programmed. The order of adjustments and the contents of adjustments can be changed as appropriate by programming them into the automatic adjustment program.

[0026] For example, it is possible to program the automatic adjustment program so that the overlay misalignment adjustment is executed with priority. The multi-projection system 1 has the excellent advantage of being able to display a seamless large-screen image by superimposing the divided image 5A of the first projector 5 and the divided image 6A of the second projector 6. On the other hand, the multi-projection system 1 has a problem in that misalignment is likely to occur when the divided image 5A and the divided image 6A are superimposed.

[0027] Overlay misalignment occurs, for example, when a person bumps into the first projector 5 and / or the second projector 6, when an earthquake or uneven settlement causes distortion in a building, when the weight of the projector causes distortion in the surface on which the projector is installed, etc. It has been found that such overlay misalignment is more likely to occur and requires greater adjustment than variations in color or brightness between the divided images 5A and 6A.

[0028] As a method for prioritizing the overlay misalignment adjustment, for example, the automatic adjustment program may be programmed to execute the overlay misalignment adjustment every time and execute other adjustments once every several times the overlay misalignment adjustment is executed. Note that the adjustment that is given priority during automatic adjustment is not limited to the adjustment of overlay misalignment. Adjustments that are likely to cause misalignment can be programmed into the automatic adjustment program so that they can be automatically adjusted at the appropriate time depending on the installation and usage conditions of the multi-projection system 1.

[0029] Also, the automatic adjustment program may be programmed to perform simple adjustment so that the automatic adjustment can be completed in a short time, for example, in a few minutes until preparations for a conference are complete or while a presenter is being changed.

[0030] The simplified adjustment is an adjustment in which the number of pattern images used is about 2 or 3, an adjustment in which the accuracy at which the adjustment is started or the target accuracy is limited, or an adjustment in which the time is limited, as opposed to the high-precision final adjustment using many pattern images performed at the time of installation. In the final adjustment of the multi-projection system 1, the adjustment is repeated many times while gradually increasing the adjustment accuracy from a rough provisional adjustment, and then the adjustment is completed to a high-precision adjustment. On the other hand, in the automatic adjustment of this embodiment, since the low-precision adjustment performed at the time of installation is not necessary, the automatic adjustment program can be programmed to perform only medium-precision adjustment. For example, in the case of overlay misalignment adjustment, it can be programmed to perform only 1.5 pixel misalignment or 1 pixel misalignment. It is also possible to program to perform only high-precision adjustment or only medium and high-precision adjustment.

[0031] The storage unit 17 is composed of memories such as a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage unit 17 stores an OS, application programs, various data, etc. Specifically, it stores various control programs including an automatic adjustment program, various pattern images used in automatic adjustment, adjustment parameters, power start time, automatic adjustment history, automatic adjustment interruption information, presentation images, etc. The adjustment parameters are stored together with adjustment history information, and when the automatic adjustment is interrupted, the image signal processing unit 14 is controlled so that the adjustment parameters before the automatic adjustment is interrupted are used as the latest adjustment parameters.

[0032] The communication unit 7 is connected to a network 8 such as an intranet or the Internet. The communication unit 7 includes, for example, a terminal for connecting to a cable for wired communication, an antenna for wireless communication, and an interface circuit. By downloading update programs from a server (not shown) via the network 8, various control programs including an automatic adjustment program stored in the storage unit 17 can always be kept up to date. Note that the image signal may be supplied via the network 8.

[0033] The operation signal receiving unit 18 receives an operation signal from a remote control 19. The operation signal receiving unit 18 includes, for example, an infrared receiving unit that receives a signal from the remote control, and a wireless communication circuit. The control unit 10 is, for example, one or more processors such as a CPU (Central Processing Unit), and controls each unit based on various control programs stored in the storage unit 17. Note that some or all of the blocks including the control unit 10 may be realized by hardware such as an LSI, a SOC, a DSP, an ASIC, a PLD, or an FPGA.

[0034] 1.2. Control method of multi-projection system Next, a control method for the multi-projection system 1 will be described with reference to Fig. 3. Fig. 3 is a flowchart showing the flow of control based on an automatic adjustment program, and shows the flow of control executed by the primary projector.

[0035] In this embodiment, the first projector 5 will be described as the primary projector, and the second projector 6 as the secondary projector. The primary projector requests the secondary projector to transmit status information of the secondary projector including detection information from no-signal detection unit 13, and controls the start, interruption, end, and the like of automatic adjustment based on status information of the entire multi-projection system 1 including the secondary projector.

[0036] In step S1, the first projector 5 and the second projector 6 are powered on. When the power is turned on, an automatic adjustment program is started, and the automatic adjustment program remains resident while the power is on. Based on the automatic adjustment program, the control unit 10 stores the time when the power was turned on in the memory unit 17, and resets the automatic adjustment history stored in the memory unit 17 to "none."

[0037] In step S2, the input of image signals to the first projector 5 and the second projector 6 is determined. Based on a transmission request from the control unit 10 of the first projector 5, the no-signal detection units 13 of the first projector 5 and the second projector 6 transmit the detection results of the presence or absence of input of an image signal to the control unit 10. The control unit 10 determines the input of an image signal based on the detection results.

[0038] If an input of an image signal is detected (step S2 / NO), the automatic adjustment flow is terminated and the process proceeds to step S41. In step S41, the first projector 5 and the second projector 6 perform image display based on the image signal. After that, in step S42, after waiting for one second, the automatic adjustment flow is executed again.

[0039] On the other hand, if the input of the image signal is not detected (step S2: YES), the process proceeds to step S3. In step S3, it is determined whether or not there is an automatic adjustment history. If the input of an image signal is not detected in step S2, it is further determined whether or not automatic adjustment has been performed since the power was turned on. This is to avoid repeatedly performing the same adjustment after the power is turned on. The automatic adjustment history is stored in the storage unit 17. The automatic adjustment history is reset to "no" when the power is turned on, and is changed to "yes" when the automatic adjustment is completed thereafter. Note that if the automatic adjustment is interrupted, the automatic adjustment history remains "no."

[0040] If the automatic adjustment history is "Yes" (step S3 / NO), the automatic adjustment flow is exited and the process proceeds to step S31. In step S31, the first projector 5 and the second projector 6 perform a no-signal display such as a blue screen. After that, in step S32, after waiting one second, the automatic adjustment flow is executed again. Even if the automatic adjustment history is "Yes", if a long time has passed since the power was turned on, for example, if one hour has passed since the power was turned on, the automatic adjustment history may be programmed to be reset to "No" every hour thereafter. Also, the program may be programmed to skip the determination of the automatic adjustment history. For example, when the adjustment is likely to become misaligned due to the effects of wind when used outdoors or due to a malfunction of the projector, the program can skip the determination of the automatic adjustment history to deal with cases where misalignment occurs after automatic adjustment.

[0041] On the other hand, if the automatic adjustment history is "none" (step S3 / YES), the process proceeds to step S4. In step S4, it is determined whether or not 20 minutes as the first period has elapsed since the power was turned on. If 20 minutes have not passed since the power was turned on (step S4 / NO), the automatic adjustment flow is exited and the process proceeds to step S31. This is because if adjustment is performed when the first projector 5 and the second projector 6 are not warmed up, deviations are likely to occur thereafter and accurate adjustment cannot be performed. Note that the first period is not limited to 20 minutes. The first period may be set to a desired time until the states of the first projector 5 and the second projector 6 are stabilized. It should be noted that the program may skip the determination of the time that has elapsed since the power was turned on. For example, when the projector state stabilizes in a very short time after the power is turned on, or when adjusting an item with a small temperature drift, such as adjusting overlay misalignment, the program may skip the determination of the time that has elapsed since the power was turned on. On the other hand, when adjusting an item with a large temperature drift, such as adjusting color variation, the program may be programmed to determine the time that has elapsed since the power was turned on.

[0042] On the other hand, if 20 minutes have passed since the power was turned on (step S4 / YES), the process proceeds to step S5. In step S5, automatic adjustment is started. The automatic adjustment starts when there is no image signal input and no automatic adjustment history in the first projector 5 and the second projector 6, and 20 minutes or more have passed since the first projector 5 and the second projector 6 were turned on. When the automatic adjustment starts, the processes from steps S6 to S14 or steps S6 to S23, which will be described later, are executed.

[0043] When the automatic adjustment starts, the cameras 16 of the first projector 5 and the second projector 6 are activated.

[0044] In step S6, it is determined whether or not there is information indicating an interruption of the automatic adjustment. When the automatic adjustment is interrupted, interruption information is stored in the storage unit 17. For example, in the first projector 5 and the second projector 6, a first pattern image is displayed as a first process, the first pattern image is photographed by the camera 16, and automatic adjustment is performed. After the adjustment using the first pattern image is completed, a second pattern image is displayed as a second process, the second pattern image is photographed by the camera 16, and if the automatic adjustment is interrupted while the automatic adjustment is being performed, the fact that the interruption occurred during the automatic adjustment using the second pattern image is stored as interruption information.

[0045] The pattern image is a gray code pattern, a binary code pattern, a phase shift pattern, etc. Here, the first pattern image displayed on the first projector 5 corresponds to the first display image, and the first pattern image displayed on the second projector 6 corresponds to the second display image.

[0046] If there is no interruption information of the automatic adjustment (step S6 / NO), step S7 is skipped and the process proceeds to step S8. On the other hand, if there is interruption information of the automatic adjustment (step S6 / YES), the process proceeds to step S7. In step S7, the adjustment is resumed based on the interruption information of the automatic adjustment. If the interruption information is stored, the interruption information is read from the storage unit 17, and the adjustment is resumed based on the interruption information. As described above, if an interruption occurs during the automatic adjustment using the second pattern image, the first projector 5 and the second projector 6 resume the automatic adjustment from the second pattern image.

[0047] In step S8, the pattern images used in the automatic adjustment are displayed on the screen 3 from the first projector 5 and the second projector 6, and the automatic adjustment is performed. If the interruption information is not recorded, the first pattern image is displayed based on the automatic adjustment program. If the interruption information is stored, the pattern image based on the interruption information is displayed.

[0048] In step S9, a one-second wait is performed. The wait times in steps S9, S32, and S42 are not limited to one second. If the wait time is changed to a time longer than one second, the load on the control unit 10 is reduced, but the response time to user operations becomes longer. Therefore, the time can be changed appropriately depending on the CPU performance and the user's usage.

[0049] In step S10, it is determined whether an image signal is input or not. If an image signal is input to the first projector 5 and the second projector 6 (step S10 / NO), the automatic processing flow is exited and the process proceeds to step S21. As a result, if a user attempts to display the user's image on the multi-projection system 1 during automatic adjustment, the automatic adjustment is immediately interrupted and the user's image can be displayed.

[0050] On the other hand, if no image signal is input (step S10 / YES), the process proceeds to step S11. In step S11, it is determined whether or not the adjustment is completed. For example, it is determined whether the adjustment using the first pattern image has been completed, and if the adjustment has not been completed (step S11 / NO), the process returns to step S8, and the adjustment using the first pattern image is continued. On the other hand, if the adjustment is completed (step S11 / YES), the process proceeds to step S12. In step S12, the adjustment parameters adjusted by the automatic adjustment are stored. For example, when adjustment using the first pattern image is completed, the adjusted adjustment parameters are stored as the latest adjustment parameters in the storage unit 17 of the first projector 5 and each storage unit 17 of the second projector 6. Note that the previous adjustment parameters are held in each storage unit 17 at least until all automatic adjustments are completed.

[0051] In step S13, it is determined whether there are any other adjustments. For example, if the automatic adjustment program includes an adjustment using a second pattern image (step S13 / NO), the process returns to step S8, and the adjustment using the second pattern image is executed.

[0052] On the other hand, if there is no other adjustment (step S13 / YES), the process proceeds to step S14. In step S14, the interruption information stored in the storage unit 17 is reset. When all adjustments programmed in the automatic adjustment program have been completed, the automatic adjustment is ended, and the interruption information stored in storage unit 17 is reset. As a result, from this point on, first projector 5 and second projector 6 perform image display using the adjustment parameters as second parameters stored in each storage unit 17 in step S12.

[0053] In step S21, the automatic adjustment is interrupted. If it is determined in step S10 that the input of an image signal is not detected in the first projector 5 and the second projector 6, the automatic processing flow is terminated and the automatic adjustment is interrupted.

[0054] In step S22, the interruption information is saved. As described above, if the automatic adjustment is interrupted during the automatic adjustment using the second pattern image, the fact that the interruption occurred during the automatic adjustment using the second pattern image is stored in the memory unit 17 as interruption information.

[0055] In step S23, the adjustment parameters before the automatic adjustment are restored. Even if the new adjustment parameters are saved in step S12, if the adjustment is interrupted, the previous adjustment parameters before the automatic adjustment is executed are stored in the storage units 17 of the first projector 5 and the second projector 6 as the latest adjustment parameters.

[0056] As a result, if an interruption occurs during automatic adjustment, the first projector 5 and the second projector 6 display images using the previous adjustment parameters before the automatic adjustment is performed as the first parameters. In other words, if an interruption occurs during automatic adjustment, the adjustment parameters of the multi-projection system 1 are not changed, so images are displayed using the previous adjustment parameters as the first parameters. On the other hand, if the automatic adjustment is completed, images are displayed using the adjustment parameters newly saved by the automatic adjustment as the second parameters.

[0057] As described above, according to this embodiment, the following effects can be obtained. A control method for a first projector 5 as a display device according to one embodiment of the present invention includes, when input of an image signal to the first projector 5 is detected, the first projector 5 displays an image based on the image signal, and, when input of an image signal is not detected, performing calibration of the first projector 5.

[0058] As a result, if the input of an image signal to the first projector 5 is not detected, automatic adjustment as calibration is performed, and if the input of an image signal to the first projector 5 is detected, image display based on the input image signal is performed. Therefore, it is possible to avoid impairing user convenience, and a highly convenient control method for a display device can be realized.

[0059] Furthermore, when automatic adjustment is performed by scheduling, if the multi-projection system 1 is in use or the first projector 5 and the second projector 6 are powered off on the scheduled date and time, the automatic adjustment will be skipped. However, according to this embodiment, automatic adjustment is performed when there is no input of an image signal, so that automatic adjustment can be performed reliably.

[0060] Note that the case where the input of an image signal is detected includes the case where the absence of an input of an image signal is not detected, and the case where the input of an image signal is not detected includes the case where the absence of an input of an image signal is detected.

[0061] The method for controlling the first projector 5 as a display device according to an aspect of the present invention further includes interrupting the calibration when input of an image signal is detected during execution of the calibration. As a result, if input of an image signal is detected during execution of automatic adjustment, the adjustment is interrupted, so that loss of convenience for the user can be avoided.

[0062] In one embodiment of the present invention, the control method for a first projector 5 as a display device further includes a calibration method including adjustment performed by displaying a first pattern image as a first process and adjustment performed by displaying a second pattern image as a second process different from the first process, and further includes interrupting the second process if input of an image signal is detected during execution of the second process after execution of the first process, and resuming the second process if input of an image signal is no longer detected after interrupting the second process. As a result, if automatic adjustment is interrupted and then performed again, adjustment can be resumed from the adjustment item where it was interrupted, thereby achieving a highly convenient control method for a display device.

[0063] A control method of a first projector 5 as a display device according to one embodiment of the present invention further includes, when the calibration is interrupted, the first projector 5 displays the image signal based on the previous adjustment parameters as the first parameters; when the input of the image signal is no longer detected during the display based on the first parameters after the calibration is interrupted, resuming the calibration; when the calibration is completed, storing the adjustment parameters adjusted by the automatic adjustment as second parameters obtained by the calibration; and when the input of the image signal is detected after the second parameters are stored, the first projector 5 displays the image signal based on the second parameters.

[0064] As a result, if the automatic adjustment is interrupted, the image is displayed using the adjustment parameters before the automatic adjustment was performed, so that it is possible to avoid display problems caused by the image being displayed using the adjustment parameters stored during the adjustment. Therefore, a highly convenient control method for a display device can be realized.

[0065] In the control method for the first projector 5 as a display device according to one embodiment of the present invention, the calibration is further performed when no input of an image signal is detected and when a first period of 20 minutes has elapsed since the first projector 5 was turned on. As a result, the automatic adjustment is controlled to be performed after the first projector 5 has warmed up and the state of the first projector 5 has stabilized, so that it is possible to avoid the occurrence of adjustment deviations thereafter by executing the automatic adjustment before the state of the first projector 5 has stabilized. Therefore, a highly convenient control method for a display device can be realized.

[0066] A control method of a multi-projection system 1 as a display system according to one embodiment of the present invention includes detecting an input of a first image signal to a first projector 5 as a first display device, detecting an input of a second image signal to a second projector 6 as a second display device, and, if the input of the first image signal is detected, causing the first projector 5 to display a first image based on the first image signal, and, if the input of the second image signal is detected, causing the second projector 6 to display a second image based on the second image signal, and, if the input of the first image signal and the input of the second image signal are not detected, performing calibration of the first projector 5 and performing calibration of the second projector 6.

[0067] As a result, when input of an image signal to the first projector 5 and the second projector 6 is not detected, automatic adjustment is performed, and when input of an image signal to the first projector 5 and the second projector 6 is detected, image display based on the input image signal is performed. This makes it possible to avoid impairing user convenience and to realize a highly convenient control method for a display system.

[0068] A first projector 5 as a display device according to one embodiment of the present invention includes a no-signal detection unit 13 as a first circuit that detects input of an image signal, a projection unit 20 as a display panel that displays an image based on the image signal when input of an image signal is detected, and an automatic adjustment unit 15 as a second circuit that performs calibration when input of an image signal is not detected. As a result, when the input of an image signal to the first projector 5 is not detected, automatic adjustment is performed, and when the input of an image signal to the first projector 5 is detected, image display based on the input image signal is performed. This makes it possible to avoid impairing user convenience and to realize a highly convenient display device.

[0069] The program according to an aspect of the present invention includes executing calibration of the first projector 5 when input of an image signal to the first projector 5 as a display device is not detected. As a result, if the input of an image signal to the first projector 5 is not detected, the program causes the first projector 5 to execute calibration. This makes it possible to avoid impairing user convenience and to realize a highly convenient program.

[0070] 2. Embodiment 2 2.1. Multi-projection system configuration The configuration of a multi-projection system 100 as a display system will be described with reference to Fig. 4. Fig. 4 is a block diagram showing an example of the configuration of a multi-projection system according to this embodiment. In the following description, the same components and procedures as those in the first embodiment are designated by the same reference numerals, and duplicated descriptions will be omitted.

[0071] As shown in Fig. 4, the multi-projection system 100 is composed of a computer 70, a first projector 50 as a display device or a first display device, a second projector 60 as a second display device, and a camera 33. A screen 3 and a network 8 are arranged or connected to the multi-projection system 100. The computer 70 is connected to the first projector 50, the second projector 60, and the camera 33 via the network 8. Therefore, the computer 70 does not need to be in the same place as the first projector 50, the second projector 60, and the camera 33. The multi-projection system 100 of the present embodiment differs from the multi-projection system 1 of the first embodiment in that a computer 70 controls the automatic adjustment.

[0072] The computer 70 includes a control unit 71 , an image processing unit 72 , a display unit 73 , a no-signal detection unit 74 , an automatic adjustment unit 75 , a storage unit 76 , a communication unit 77 , and an input unit 78 .

[0073] The control unit 71 is, for example, one or more processors. The communication unit 77 includes, for example, a terminal for connecting to a cable for wired communication, an antenna for wireless communication, and an interface circuit. The image processing unit 72 generates divided image 50A and divided image 60A based on image information stored in the memory unit 76 or image information stored in a server on the network 8, and outputs them to the first projector 50 and the second projector 60, respectively.

[0074] The no-signal detection unit 74 monitors whether or not the divided image 50A and the divided image 60A are output to the first projector 50 and the second projector 60, and outputs detection information to the control unit 71. The no-signal detection unit 74 is configured to include, for example, a circuit that detects the output of an image signal. The no-signal detection unit 74 may be configured integrally with an interface circuit included in the communication unit 77.

[0075] The automatic adjustment unit 75 performs automatic adjustment regarding image display based on an automatic adjustment program. The image processing unit 72 and the automatic adjustment unit 75 are configured, for example, by an integrated circuit. The integrated circuit includes an LSI, an SOC, a DSP, an ASIC, a PLD, an FPGA, etc. Furthermore, an analog circuit may be included as part of the configuration of the integrated circuit, and the integrated circuit may be configured to be combined with the control unit 71. Based on a transmission request from computer 70 , camera 33 captures an image of a pattern for adjustment displayed on screen 3 during automatic adjustment, and transmits the image to automatic adjustment unit 75 .

[0076] The automatic adjustment unit 75 analyzes the pattern image captured by the camera 33 and modifies the adjustment parameters so that the pattern image becomes a specified display image, and when the adjustment is completed, stores the modified adjustment parameters in the memory unit 76.

[0077] The storage unit 76 is composed of memories such as RAM and ROM. The storage unit 76 stores the OS, application programs, various data, etc. Specifically, it stores various control programs including an automatic adjustment program, adjustment parameters for image adjustment, and various information such as the power-on time, automatic adjustment history, and automatic adjustment interruption information.

[0078] The first projector 50 and the second projector 60 have the same configuration. When the automatic adjustment is started, the adjustment sections 31 of the first projector 50 and the second projector 60 execute the adjustment based on a control signal from the computer 70 .

[0079] The first projector 50 and the second projector 60 may be configured to include a no-signal detection unit 13. In this case, the no-signal detection unit 13 monitors the presence or absence of an input of an image signal based on a transmission request from the computer 70, and transmits the monitoring result to the computer 70.

[0080] 2.2. Control method of multi-projection system Next, a control method for the multi-projection system 100 will be described with reference to Fig. 3. In this embodiment, the automatic adjustment is controlled by the computer 70. The flow of control executed by the computer 70 is approximately the same as the control executed by the primary projector in the first embodiment.

[0081] In step S1, the first projector 50 and the second projector 60 are started. The start-up of the first projector 50 and the second projector 60 may be controlled by the computer 70. In addition, the automatic adjustment program may be programmed to start up together with the start-up of the first projector 50 and the second projector 60.

[0082] In step S2, it is determined whether or not an image signal has been input to the first projector 50 and the second projector 60. Based on detection information from the no-signal detection unit 74 or the no-signal detection unit 13, the control unit 71 determines whether or not an image signal has been input.

[0083] In step S3, it is determined whether or not there is a history of automatic adjustment. If there is no input of an image signal (step S2: YES), it is further determined whether or not automatic adjustment has been performed since the first projector 50 and the second projector 60 were powered on. The automatic adjustment history is stored in the storage unit 76, and is reset to "NO" when the first projector 50 and the second projector 60 are powered on, and is changed to "YES" after the automatic adjustment is completed.

[0084] In step S4, it is determined whether or not 20 minutes have passed since the first projector 50 and the second projector 60 were powered on.

[0085] In step S5, the automatic adjustment is started. When the automatic adjustment starts, the computer 70 starts up the camera 33 and executes the processes of steps S6 to S14 and steps S21 to S23, which will be described later.

[0086] In step S6, the presence or absence of interruption information of the automatic adjustment is determined. The interruption information is stored in the storage unit .

[0087] In step S7, the adjustment is restarted based on the interruption information of the automatic adjustment. If the interruption information is stored, the interruption information is read from the storage unit 76, and the adjustment is resumed based on the interruption information.

[0088] In step S8, the pattern image to be used in the automatic adjustment is displayed on the screen 3, and the automatic adjustment is performed. The adjustment units 31 of the first projector 50 and the second projector 60 are controlled by the computer 70 to display pattern images.

[0089] In step S12, the adjustment parameters adjusted by the automatic adjustment are saved. The adjustment parameters are stored in the storage units 17 of the first projector 50 and the second projector 60, respectively.

[0090] In step S14, the interruption information stored in memory unit 76 or memory unit 17 is reset. When all adjustments programmed in the automatic adjustment program have been completed, the automatic adjustment is completed, and the interruption information stored in memory unit 76 or memory unit 17 is reset.

[0091] In step S22, the interruption information is saved. The interruption information is stored in the storage unit 76 or the storage unit 17.

[0092] As described above, according to this embodiment, in addition to the effects of the above-mentioned embodiments, the following effects can be obtained. A control method for a first projector 50 as a display device according to one embodiment of the present invention includes, when input of an image signal to the first projector 50 is detected, the first projector 50 displays an image based on the image signal, and, when input of an image signal is not detected, the first projector 50 adjusts a pattern image as a display image.

[0093] As a result, when the input of an image signal to the first projector 50 is not detected, automatic adjustment is performed, and when the input of an image signal to the first projector 50 is detected, image display based on the input image signal is performed. Therefore, it is possible to avoid impairing user convenience, and a highly convenient control method for a display device can be realized.

[0094] A control method of a multi-projection system 100 as a display system according to one embodiment of the present invention includes detecting an input of a first image signal to a first projector 50 as a first display device, detecting an input of a second image signal to a second projector 60 as a second display device, and, if the input of the first image signal is detected, causing the first projector 50 to display a first image based on the first image signal, and, if the input of the second image signal is detected, causing the second projector 60 to display a second image based on the second image signal, and, if the input of the first image signal and the input of the second image signal are not detected, causing the first projector 50 to adjust a pattern image as a first display image, and the second projector 60 to adjust the pattern image as a second display image.

[0095] As a result, when input of an image signal to the first projector 50 and the second projector 60 is not detected, automatic adjustment is performed, and when input of an image signal to the first projector 50 and the second projector 60 is detected, image display based on the input image signal is performed. This makes it possible to avoid impairing user convenience and to realize a highly convenient control method for a display system.

[0096] A program according to one embodiment of the present invention includes causing the first projector 50 to adjust a pattern image as a display image when input of an image signal to the first projector 50 as a display device is not detected. As a result, when the input of an image signal to the first projector 50 is not detected, the program causes the first projector 50 to adjust the display image. This makes it possible to avoid impairing user convenience and to realize a highly convenient program.

[0097] 3. Embodiment 3 3.1.Projector configuration The configuration of a projector 5 as a display device will be described with reference to Fig. 5. Fig. 5 is a block diagram showing an example of the configuration of a projector according to this embodiment. In the following description, the same reference numerals are used for the same configurations and procedures as those in embodiment 1, and duplicated descriptions will be omitted.

[0098] As shown in FIG. 5, the projector 5 displays a large-screen image on the screen 3 based on an image signal input from the image signal output device 2. A projector 5 of the present embodiment differs from the multi-projection system 1 of the first embodiment in that a large screen is displayed by a single projector.

[0099] Projector 5 has the same configuration as first projector 5 of embodiment 1. In addition, the automatic adjustment program stored in storage unit 17 is programmed to operate in the same manner as the automatic adjustment program of embodiment 1, except that control of the secondary projector is not necessary and the adjustment contents executed during automatic adjustment are partially different.

[0100] In this embodiment, adjustments performed by the automatic adjustment program can include, for example, frame alignment adjustment to fit the display image of the projector 5 to the frame of the screen 3, and keystone correction to adjust the display image of the projector 5 to a square.

[0101] In the above-mentioned first and second embodiments, examples have been described in which a projector is used as a display device, but a multi-display system may be configured by adopting a direct-view display such as an FPD (Flat Panel Display) as the display device. In this case, adjustments to be performed by the automatic adjustment program can be programmed to adjust, for example, color variation and brightness variation. The panel of a direct-view display such as an FPD is an example of a display panel.

[0102] In addition, in the above-mentioned third embodiment, an example in which a projector is used as the display device has been described, but a direct-view display such as an FPD may also be used as the display device. In this case, for example, resolution adjustment, brightness adjustment, and color tone adjustment can be programmed as adjustments executed by the automatic adjustment program. The panel of a direct-view display such as an FPD is an example of a display panel.

[0103] Although the present invention has been described based on the preferred embodiment, the present invention is not limited to the above-mentioned embodiment. Furthermore, the configuration of each part of the present invention can be replaced with any configuration that exhibits the same function as the above-mentioned embodiment, and any configuration can be added.

[0104] [Summary of this disclosure] The following is a summary of this disclosure. (Appendix 1) When an input of an image signal to a display device is detected, the display device displays an image based on the image signal; and performing calibration of the display device when the input of the image signal is not detected. A method for controlling a display device. As a result, when the input of an image signal to the display device is not detected, automatic adjustment is performed, and when the input of an image signal to the display device is detected, an image is displayed based on the input image signal. Therefore, it is possible to avoid impairing user convenience, and a highly convenient control method for a display device can be realized.

[0105] (Appendix 2) If input of the image signal is detected during execution of the calibration, the calibration is interrupted. A method for controlling the display device according to claim 1. As a result, if input of an image signal is detected during execution of automatic adjustment, the adjustment is interrupted, so that loss of convenience for the user can be avoided.

[0106] (Appendix 3) the calibration includes a first process and a second process different from the first process, If input of the image signal is detected during execution of the second process after execution of the first process, interrupting the second process; and resuming the second process when the input of the image signal is no longer detected after the second process is interrupted. A method for controlling the display device according to claim 1. As a result, if automatic adjustment is interrupted and then performed again, adjustment can be resumed from the adjustment item where it was interrupted, thereby achieving a highly convenient control method for a display device.

[0107] (Appendix 4) When the calibration is interrupted, the display device displays the image signal based on a first parameter; restarting the calibration when the input of the image signal is no longer detected during the display based on the first parameters after the calibration is interrupted; When the calibration is completed, storing a second parameter obtained by the calibration; and and when an input of the image signal is detected after the second parameter is stored, the display device displays the image signal based on the second parameter. A method for controlling the display device according to claim 2. As a result, if the automatic adjustment is interrupted, the image is displayed using the adjustment parameters before the automatic adjustment was performed, so that it is possible to avoid display problems caused by the image being displayed using the adjustment parameters stored during the adjustment. Therefore, a highly convenient control method for a display device can be realized.

[0108] (Appendix 5) The calibration is performed when the input of the image signal is not detected and a first period has elapsed since the display device was powered on. A method for controlling the display device according to any one of claims 1 to 4. This allows the display device to be controlled so that automatic adjustment is performed after the display device has warmed up, so that executing automatic adjustment before the display device has warmed up can prevent adjustment deviation from occurring thereafter. Thus, a highly convenient display device control method can be realized.

[0109] (Appendix 6) Detecting an input of a first image signal to a first display device; Detecting an input of a second image signal to a second display device; When an input of the first image signal is detected, the first display device displays a first image based on the first image signal; When the input of the second image signal is detected, the second display device displays a second image based on the second image signal; and When the input of the first image signal and the input of the second image signal are not detected, performing a calibration of the first display device and performing a calibration of the second display device. A method for controlling a display system. As a result, when the input of an image signal to the first display device and the second display device is not detected, automatic adjustment is performed, and when the input of an image signal to the first display device and the second display device is detected, control is performed so that an image display based on the input image signal is performed. This makes it possible to avoid impairing user convenience and realize a highly convenient control method for a display system.

[0110] (Appendix 7) a first circuit for detecting an input of an image signal; a display panel that displays an image based on the image signal when the input of the image signal is detected; and a second circuit that performs calibration when the input of the image signal is not detected. Display device. As a result, when the input of an image signal to the display device is not detected, automatic adjustment is performed, and when the input of an image signal to the display device is detected, an image is displayed based on the input image signal. This makes it possible to avoid impairing user convenience and realize a highly convenient display device.

[0111] (Appendix 8) When an input of an image signal to the display device is not detected, a calibration of the display device is performed. program. As a result, when the input of an image signal to the display device is not detected, the program causes the display device to adjust the displayed image. This makes it possible to avoid impairing user convenience and realize a highly convenient program. [Explanation of symbols]

[0112] 1...multi-projection system, 2...image signal output device, 3...screen, 4...transmission cable, 5...projector, first projector, 5A...divided image, 6...second projector, 6A...divided image, 7...communication unit, 7a...antenna, 8...network, 8a...access point, 10...control unit, 11...full image, 12...image signal input unit, 13...no signal detection unit, 14...image signal processing unit, 15...automatic adjustment unit, 16...camera , 17...memory unit, 18...operation signal receiving unit, 19...remote control, 20...projection unit, 21...light source, 22...optical engine, 23...projection optical system, 31...adjustment unit, 33...camera, 50...first projector, 50A...divided image, 60...second projector, 60A...divided image, 70...computer, 71...control unit, 72...image processing unit, 73...display unit, 74...no signal detection unit, 75...automatic adjustment unit, 76...memory unit, 77...communication unit, 78...input unit.

Claims

1. When an input of an image signal to a display device is detected, the display device displays an image based on the image signal, and when the input of the image signal is not detected, the display device performs calibration of the display device, including: A control method for a display device.

2. When an input of the image signal is detected during the execution of the calibration, the calibration is interrupted, further including: The control method for a display device according to claim 1.

3. When the calibration is interrupted, the display device displays an image based on the image signal, further including: The control method for a display device according to claim 2.

4. The calibration includes a first process and a second process different from the first process, and when an input of the image signal is detected during the execution of the second process after the execution of the first process, the second process is interrupted, and when the input of the image signal is no longer detected after the interruption of the second process, the second process is resumed, further including: The control method for a display device according to claim 1.

5. When the calibration is interrupted, the display device displays the image signal based on a first parameter, and when the input of the image signal is no longer detected during the display based on the first parameter after the interruption of the calibration, the calibration is resumed, including: When the calibration is completed, the second parameter obtained by the calibration is stored. The second parameter is stored. After the second parameter is stored, when the input of the image signal is detected, the display device displays the image signal based on the second parameter. Further included. Moreover, The control method of the display device according to claim 2.

6. The calibration is executed when the input of the image signal is not detected and when a first period has elapsed since the power of the display device was turned on. The control method of the display device according to any one of claims 1 to 5.

7.

7. Detecting the input of the first image signal to the first display device. Detecting the input of the second image signal to the second display device. When the input of the first image signal is detected, the first display device displays a first image based on the first image signal. When the input of the second image signal is detected, the second display device displays a second image based on the second image signal. When the input of the second image signal is detected, the second display device displays a second image based on the second image signal. When the input of the first image signal and the input of the second image signal are not detected, calibrating the first display device and calibrating the second display device. When the input of the first image signal and the input of the second image signal are not detected, calibrating the first display device and calibrating the second display device. Executing calibration of the first display device and executing calibration of the second display device. The control method of the display system includes. The control method of the display system.

8. A first circuit for detecting the input of the image signal. When the input of the image signal is detected, a display panel for displaying an image based on the image signal. A display panel for displaying an image based on the image signal. A second circuit that performs calibration when the input of the image signal is not detected , and, A display device.

9. When the input of the image signal to the display device is not detected, causing the computer to perform calibration of the display device, and, A program.

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