JP2011227119A - Projector and method of controlling the same - Google Patents

Abstract

Provided is a projector in which a lens adjustment amount is not easily changed.
A projector includes a light source, a light modulation device (liquid crystal light valve) that modulates light emitted from the light source into image light according to an image signal, and an image modulated by the light modulation device. A projection lens 13 that projects light, a lens adjustment mechanism that performs a predetermined adjustment operation on the projection lens 13 (focus adjustment mechanism 131, zoom adjustment mechanism 132, lens shift adjustment mechanism 133), and an operation reception unit that receives operation signals 21 and a control unit 20 that switches to a lens adjustment prohibition state that prohibits a predetermined adjustment operation by the lens adjustment mechanism when the operation reception unit 21 receives a first operation signal.
[Selection] Figure 1

Description

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

  Conventionally, a projector including a lens adjustment mechanism such as an electric focus, an electric zoom, and an electric lens shift is known. In situations where such projectors are used, after the projector installer has adjusted motorized focus, motorized zoom, and motorized lens shift to the optimum state, other users accidentally changed the lens adjustment amount (adjustment value). There was a case. In order to prevent such an erroneous operation, an electronic device (projector) capable of setting a key lock function that is a function that does not accept operation of an operation key is known (for example, Patent Document 1).

JP 2009-239720 A

  However, in the projector of Patent Document 1, since the entire key operation is locked, there is a problem that various functions other than the lens adjustment mechanism cannot be set or changed. In such projectors, the key operations on the projector itself are locked, but the key operations on the remote control (remote controller) are not locked, so the adjustment amount of electric focus, electric zoom, and electric lens shift can be changed using the remote control. There was a case where it was done. Therefore, there has been a demand for a projector in which the lens adjustment amount is not easily changed.

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

  Application Example 1 A projector according to this application example includes a light source, a light modulation device that modulates light emitted from the light source into image light according to an image signal, and the image modulated by the light modulation device. A projection lens that projects light, a lens adjustment mechanism that performs a predetermined adjustment operation on the projection lens, an operation reception unit that receives an operation signal, and the operation reception unit that receives a first operation signal, And a control unit that switches to a lens adjustment prohibition state that prohibits the predetermined adjustment operation by the lens adjustment mechanism.

  According to such a projector, the lens adjustment mechanism performs a predetermined adjustment operation on the projection lens. The control unit switches to a lens adjustment prohibited state in which a predetermined adjustment operation by the lens adjustment mechanism is prohibited when the operation reception unit receives the first operation signal. Thereby, in the lens adjustment prohibition state, a predetermined adjustment operation by the lens adjustment mechanism is prohibited, so that it is possible to prevent the lens adjustment amount from being changed by mistake. Further, in the lens adjustment prohibited state, for example, a predetermined adjustment operation by a remote controller or the like can be prohibited.

  Application Example 2 In the projector according to the application example, the predetermined adjustment operation by the lens adjustment mechanism may be a focus adjustment operation for focus adjustment, a zoom adjustment operation for adjusting a projection angle of view, or the projection. It is characterized by a lens shift adjustment operation that adjusts the projection position of an image by moving the lens.

  According to such a projector, the predetermined adjustment operation is a focus adjustment operation, a zoom adjustment operation, or a lens shift adjustment operation. Accordingly, since the focus adjustment operation is prohibited in the lens adjustment prohibited state, it is possible to prevent the focus adjustment amount from being changed by mistake. Further, in the lens adjustment prohibited state, zoom adjustment operation is prohibited, so that the zoom adjustment amount can be prevented from being changed by mistake. Further, since the lens shift adjustment operation is prohibited in the lens adjustment prohibited state, it is possible to prevent the lens shift adjustment amount from being changed by mistake.

  Application Example 3 In the projector according to the application example described above, when the operation receiving unit receives a second operation signal for causing the lens adjustment mechanism to perform the predetermined adjustment operation in the lens adjustment prohibited state. And an adjustment prohibition display control unit for projecting a screen indicating that the lens adjustment is prohibited.

  According to such a projector, the adjustment prohibition display control unit projects a screen indicating that the lens adjustment is prohibited when the second operation signal is received in the lens adjustment prohibited state. Thereby, the user who transmitted the second operation signal can recognize that the lens adjustment is prohibited.

  Application Example 4 In the projector according to the application example, the projector further includes an adjustment amount storage unit capable of storing adjustment amount information in the predetermined adjustment operation by the lens adjustment mechanism, and the control unit includes the operation reception unit When the first operation signal is received, the adjustment amount information is stored in the adjustment amount storage unit, and when the operation reception unit receives the third operation signal, the control unit is stored in the adjustment amount storage unit. According to the adjustment amount information, the lens adjustment mechanism performs the predetermined adjustment operation.

  According to such a projector, the adjustment amount storage unit stores adjustment amount information in a predetermined adjustment operation by the lens adjustment mechanism. When the control unit receives the first operation signal, the control unit stores the adjustment amount information in the adjustment amount storage unit. When the control unit receives the third operation signal, the control unit stores the lens adjustment mechanism according to the adjustment amount information stored in the adjustment amount storage unit. To perform a predetermined adjustment operation. Thus, if the desired adjustment amount information is stored by the first operation signal, even if the lens adjustment amount is changed by mistake, the user can return to the desired adjustment amount by the third operation signal. This improves convenience.

  Application Example 5 In the projector according to the application example described above, in the lens adjustment prohibited state, the control unit executes control other than the predetermined adjustment operation of the lens adjustment mechanism based on the operation signal. And

  According to such a projector, even in the lens adjustment prohibited state, the user can set and change various functions other than the predetermined adjustment operation by the lens adjustment mechanism, so that convenience is improved.

  Application Example 6 A projector control method according to this application example includes a light source, a light modulation device that modulates light emitted from the light source into image light according to an image signal, and a light modulation device that modulates the light. A projector control method comprising: a projection lens that projects the image light; a lens adjustment mechanism that performs a predetermined adjustment operation on the projection lens; and an operation reception unit that receives an operation signal. A first operation receiving step for receiving a first operation signal by the unit, and a lens adjustment for prohibiting the predetermined adjustment operation by the lens adjustment mechanism when the first operation signal is received by the first operation receiving step. And a control step for switching to the prohibited state.

  According to such a projector control method, in a lens adjustment prohibited state, a predetermined adjustment operation by the lens adjustment mechanism is prohibited, so that the lens adjustment amount can be prevented from being changed by mistake.

  Further, when the projector and the control method thereof are constructed using a computer provided in the projector, the form and the application example described above are a program for realizing the function, or the program is stored in the computer. It is also possible to constitute in the form of a recording medium or the like recorded so as to be readable by the user. Recording media include flexible disks, hard disks, CD-ROM (Compact Disk Read Only Memory), DVD (Digital Versatile Disk), Blu-ray Disc (registered trademark), magneto-optical disk, nonvolatile memory card, internal storage of projector Use various computer-readable media such as devices (semiconductor memories such as RAM (Random Access Memory) and ROM (Read Only Memory)) and external storage devices (USB (Universal Serial Bus) memory, etc.). Can do.

1 is a block diagram showing a schematic configuration of a projector. Explanatory drawing of the operation prohibition setting menu screen of a lens adjustment mechanism. 10 is a flowchart of processing when a lens adjustment prohibition setting operation is received. The flowchart of the process at the time of receiving a lens adjustment start signal. It is explanatory drawing of a lens adjustment prohibition display screen, (a) is explanatory drawing of a lens adjustment prohibition message screen, (b) is explanatory drawing of a lens adjustment prohibition icon screen. Explanatory drawing of the restoration operation menu screen of a lens adjustment amount. The flowchart of the process at the time of accepting restoration operation | movement of a lens adjustment amount. Explanatory drawing of a lens adjustment amount non-memory message screen.

  Hereinafter, embodiments will be described.

(Embodiment)
In the present embodiment, a projector capable of prohibiting the adjustment operation of the lens adjustment mechanism will be described.

  FIG. 1 is a block diagram illustrating a schematic configuration of a projector according to the present embodiment. The internal configuration of the projector 1 will be described with reference to FIG.

  The projector 1 includes an image projection unit 10, a control unit 20, an operation reception unit 21, a signal reception unit 22, a light source control unit 23, a focus control unit 24, a zoom control unit 25, a lens shift control unit 26, an adjustment amount storage unit 27, An image signal input unit 30, an image processing unit 31, an OSD (on-screen display) processing unit 32, a remote controller 50, and the like are provided.

  The image projection unit 10 includes a discharge-type light source such as an ultra-high pressure mercury lamp and a metal halide lamp, a light source 11 including a solid light source such as an LED (Light Emitting Diode) or a laser, a liquid crystal light valve 12 as a light modulation device, and a projection. A lens 13, a light valve driving unit 14 that drives the liquid crystal light valve 12, a focus adjustment mechanism 131, a zoom adjustment mechanism 132, and a lens shift adjustment mechanism 133 are provided.

  The liquid crystal light valve 12 is configured by a transmissive liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. When a driving voltage corresponding to an image signal is applied to each pixel of the liquid crystal light valve 12 by driving the light valve driving unit 14, each pixel transmits light source light with a light transmittance corresponding to the image signal.

  The light emitted from the light source 11 is modulated by passing through the liquid crystal light valve 12, and the modulated light is projected by the projection lens 13, whereby an image corresponding to the image signal is displayed on the screen SC or the like. The

  The projection lens 13 has a focus lens 13a, and focus adjustment (focus adjustment) is possible by moving the position of the focus lens 13a. The projection lens 13 has a zoom lens 13b, and the projection angle of view can be adjusted by changing the zoom state.

  The focus adjustment mechanism 131 includes a motor, a gear, and the like, and drives (moves) the focus lens 13a based on control from the focus control unit 24 to perform focus adjustment. The focus adjustment mechanism 131 detects the position of the focus lens 13a as a focus amount. Then, the focus amount that is the detection result is output to the focus control unit 24. In this embodiment, as a method of detecting the focus amount, the change amount of the focus lens 13a is detected by an encoder or the like. As another method of detecting the focus amount, the motor of the focus adjustment mechanism 131 may be a stepping motor, and the detection may be performed based on the number of steps of the stepping motor.

  The zoom adjustment mechanism 132 includes a motor, gears, and the like, and drives (moves) the zoom lens 13b based on control from the zoom control unit 25 to perform zoom adjustment. The zoom adjustment mechanism 132 detects the zoom state of the zoom lens 13b as a zoom amount. Then, the zoom amount that is the detection result is output to the zoom control unit 25. In this embodiment, as a method of detecting the zoom amount, the change amount of the zoom lens 13b is detected by an encoder or the like. As another method for detecting the zoom amount, the motor of the zoom adjustment mechanism 132 may be a stepping motor and may be detected based on the number of steps of the stepping motor.

  The lens shift adjustment mechanism 133 includes a motor and gears that move the projection lens 13, and moves the projection lens 13 based on the control from the lens shift control unit 26, thereby changing the projection position of the projection image. . The lens shift adjustment mechanism 133 detects the lens shift state of the projection lens 13 as a lens shift amount. Then, the lens shift amount as a detection result is output to the lens shift control unit 26. In this embodiment, as a method of detecting the lens shift amount, the position change amount of the projection lens 13 is detected by an encoder or the like. As another method of detecting the lens shift amount, the motor of the lens shift adjustment mechanism 133 may be a stepping motor and may be detected based on the number of steps of the stepping motor.

  The focus adjustment mechanism 131, zoom adjustment mechanism 132, and lens shift adjustment mechanism 133 described above correspond to the lens adjustment mechanism. Further, the above-described focus amount, zoom amount, and lens shift amount correspond to the adjustment amount information.

  The control unit 20 includes a CPU (Central Processing Unit), a RAM used for temporary storage of various data, and a non-volatile memory such as a mask ROM, flash memory, FeRAM (Ferroelectric RAM), etc. (Not shown) and functions as a computer. The control unit 20 performs overall control of the operation of the projector 1 by the CPU operating according to a control program stored in a nonvolatile memory. In addition, the control unit 20 includes a lens adjustment state flag 20a that stores a lens adjustment permission state and a lens adjustment prohibition state as a nonvolatile memory.

  The operation reception unit 21 includes a plurality of keys and the like for issuing various instructions to the projector 1. As keys provided in the operation receiving unit 21, a “power key” for turning on / off the power, an “input switching key” for switching an input image signal, and a menu screen for performing various settings are displayed. "Menu key" for switching between / non-display, "Focus adjustment start key" for starting focus adjustment, "Zoom adjustment start key" for starting zoom adjustment, "Lens shift adjustment for starting lens shift adjustment" There are “start key”, “cursor key” used for moving the cursor on the menu screen, changing the adjustment amount in each lens adjustment state, etc., “decision key” for determining various settings, and the like. When the user operates the operation receiving unit 21, the operation receiving unit 21 outputs control information corresponding to the user's operation content to the control unit 20.

  The remote controller 50 issues an operation signal such as an infrared ray corresponding to the operation content of the user, and gives various instructions to the main body of the projector 1. The remote controller 50 has a configuration covered with a casing, and has a plurality of keys on its surface. The keys provided on the remote controller 50 include a “power key” for turning on / off the power of the projector 1, an “input switching key” for switching an input image signal, and a menu screen for performing various settings. “Menu key” for switching display / non-display, “Focus adjustment start key” for starting focus adjustment, “Zoom adjustment start key” for starting zoom adjustment, “Lens shift for starting lens shift adjustment” There are “adjustment start key”, “cursor key” used for moving the cursor on the menu screen, changing the adjustment amount in each lens adjustment state, etc., “decision key” for determining various settings, and the like. The operation signal generated by the remote controller 50 is received by the signal receiving unit 22.

  The signal receiving unit 22 includes an infrared receiving module and the like, receives an operation signal issued from the remote controller 50, and outputs the operation signal to the control unit 20 as control information.

  Based on an instruction from the control unit 20, the light source control unit 23 controls the supply and stop of power to the light source 11 and switches between turning on and off the light source 11.

  The focus control unit 24 performs focus adjustment by controlling the focus adjustment mechanism 131 and moving the focus lens 13a based on an instruction from the control unit 20. The focus control unit 24 receives the focus amount from the focus adjustment mechanism 131 and outputs the focus amount to the control unit 20.

  Based on an instruction from the control unit 20, the zoom control unit 25 controls the zoom adjustment mechanism 132 to move the zoom lens 13b to perform zoom adjustment. Further, the zoom control unit 25 inputs the zoom amount from the zoom adjustment mechanism 132 and outputs it to the control unit 20.

  The lens shift control unit 26 controls the lens shift adjustment mechanism 133 based on an instruction from the control unit 20 to move the projection lens 13 to perform lens shift adjustment. The lens shift control unit 26 receives the lens shift amount from the lens shift adjustment mechanism 133 and outputs the lens shift amount to the control unit 20.

  The adjustment amount storage unit 27 includes a nonvolatile memory, and stores a focus amount, a zoom amount, and a lens shift amount when the operation prohibition setting of the lens adjustment mechanism is set. The control unit 20 writes the focus amount, zoom amount, and lens shift amount to the adjustment amount storage unit 27. The stored focus amount, zoom amount, and lens shift amount are read by the control unit 20.

  The image signal input unit 30 has various image input terminals for connecting to an external image supply device (not shown) such as a personal computer, a video playback device, a memory card, a USB storage, a digital camera, etc. via a cable. The image signal is input from the image supply device. The image signal input unit 30 converts the input image signal into image data in a format that can be processed by the image processing unit 31, and outputs the image data to the image processing unit 31.

  The image processing unit 31 adjusts brightness, contrast, sharpness, hue, and various image quality adjustments such as gamma correction on the image data input from the image signal input unit 30 based on instructions from the control unit 20. Apply. The image processing unit 31 outputs the image data subjected to such adjustment and processing to the OSD processing unit 32.

  The OSD processing unit 32 performs processing for superimposing an OSD image such as a menu screen or a message screen on image data input from the image processing unit 31 based on an instruction from the control unit 20. The OSD processing unit 32 includes an OSD memory (not shown), and stores OSD image data representing graphics, fonts, and the like for forming an OSD image. When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 32 reads out necessary OSD image data from the OSD memory and superimposes the OSD image on a predetermined position of the input image. The OSD image data is synthesized with the image data input from the. The image data combined with the OSD image data is output to the light valve driving unit 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 32 outputs the image data output from the image processing unit 31 to the light valve driving unit 14 as it is.

  When the light valve driving unit 14 drives the liquid crystal light valve 12 according to the image data input from the OSD processing unit 32, the liquid crystal light valve 12 modulates the light incident from the light source 11 into image light according to the image data. The image light is projected from the projection lens 13.

  Next, a setting method for prohibiting operation of the three lens adjustment mechanisms including the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 will be described. The operation prohibition setting of the lens adjustment mechanism is set from the menu screen by the user operating the operation receiving unit 21 or the remote controller 50.

  FIG. 2 is an explanatory diagram of an operation prohibition setting menu screen of the lens adjustment mechanism. The lens adjustment mechanism operation prohibition setting menu screen M1 is a menu screen for allowing the user to select operation prohibition settings for the three lens adjustment mechanisms of the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 of the projector 1. It is. In the present embodiment, the operation prohibition setting menu screen M1 of the lens adjustment mechanism is set to OSD display, and the control unit 20 instructs the OSD processing unit 32 to display the OSD display.

  As shown in FIG. 2, at the top of the lens adjustment mechanism operation prohibition setting menu screen M1, a character string “lens adjustment mechanism operation prohibition setting” indicating that the lens adjustment mechanism operation prohibition setting menu screen is displayed. It is displayed. Below that, a character string “Do you want to prohibit the operation of the lens adjustment mechanism (focus, zoom, lens shift)?” For explaining the operation prohibition setting of the lens adjustment mechanism is displayed. Furthermore, in the center of the screen, there are displayed options of “do not prohibit” and “prohibit”. In the lower part of the screen, an explanation about the key input procedure is displayed.

  When the user operates the operation reception unit 21 or the remote controller 50 and selects “do not prohibit” on the screen, the control unit 20 changes the state of the projector 1 to the lens adjustment permission state that permits the operation (operation) of the lens adjustment mechanism. Switch to. When the user selects “prohibit”, the control unit 20 switches the state of the projector 1 to a lens adjustment prohibited state in which the operation (operation) of the lens adjustment mechanism is prohibited. Here, the control part 20 shall memorize | store a lens adjustment permission state and a lens adjustment prohibition state in the lens adjustment state flag 20a.

Next, processing when the projector 1 receives a setting operation for prohibiting lens adjustment will be described. Here, the lens adjustment prohibition setting operation corresponds to the first operation signal.
FIG. 3 is a flowchart of processing when the projector 1 receives a setting operation for prohibiting lens adjustment.

  When the lens adjustment prohibition setting menu screen M1 is used to accept a lens adjustment prohibition setting operation (step S101), the control unit 20 sets the focus amount, the zoom amount, and the lens shift amount as adjustment amount information, and the focus control unit. 24, input from the zoom control unit 25 and the lens shift control unit 26, and stored in the adjustment amount storage unit 27 (step S102). Then, the control unit 20 switches the projector 1 to the lens adjustment prohibited state (step S103). At this time, the control unit 20 stores the lens adjustment prohibition state in the lens adjustment state flag 20a. Then, the processing when the projector 1 receives a setting operation for prohibiting lens adjustment is ended.

Next, processing when the projector 1 receives a lens adjustment start signal will be described. When the user presses a lens adjustment start key such as a focus adjustment start key, a zoom adjustment start key, or a lens shift adjustment start key provided in the operation reception unit 21 or the remote controller 50, a lens adjustment start signal is notified to the control unit 20. Here, the lens adjustment start signal corresponds to the second operation signal.
FIG. 4 is a flowchart of processing when the projector 1 receives a lens adjustment start signal.

  When the control unit 20 receives the lens adjustment start signal (step S201), the control unit 20 refers to the lens adjustment state flag 20a to determine whether or not the lens adjustment is prohibited (step S202). If the lens adjustment is prohibited (step S202: YES), the control unit 20 instructs the OSD processing unit 32 to display a lens adjustment prohibition display screen indicating that lens adjustment is prohibited (step S203). . The control unit 20 and the OSD processing unit 32 at this time correspond to an adjustment prohibition display control unit. Then, the processing when the projector 1 receives the lens adjustment start signal ends.

Here, a lens adjustment prohibition display screen indicating that lens adjustment is prohibited will be described.
FIG. 5 is an explanatory diagram of a lens adjustment prohibition display screen, FIG. 5 (a) is an explanatory diagram of a lens adjustment prohibition message screen, and FIG. 5 (b) is an explanatory diagram of a lens adjustment prohibition icon screen. . The lens adjustment prohibition display screen may display the lens adjustment prohibition message screen M2 as shown in FIG. 5A or the lens adjustment prohibition icon screen M3 as shown in FIG. 5B. Good.

  As shown in FIG. 5A, on the lens adjustment prohibition message screen M2, a character string “Operation of the lens adjustment mechanism is prohibited” is displayed. Further, as shown in FIG. 5B, an icon G1 representing a lock is displayed on the lens adjustment prohibition icon screen M3.

  Returning to FIG. 4, when the lens adjustment is not prohibited, that is, when the lens adjustment is permitted (step S202: NO), the control unit 20 shifts to a lens adjustment mode that is a lens adjustable mode. (Step S204). In the lens adjustment mode, focus adjustment, zoom adjustment, and lens shift adjustment can be performed by operating a cursor key. Then, the processing when the projector 1 receives the lens adjustment start signal ends.

  As described above, when the lens adjustment start state is received when the lens adjustment start signal is received, the projector 1 displays that the lens adjustment is prohibited and does not shift to the lens adjustment mode. When the lens adjustment permission state is set, the mode shifts to the lens adjustment mode. In the lens adjustment prohibition state, various functions other than the lens adjustment operation can be set or changed. That is, even in the lens adjustment prohibited state, it is possible to perform operations such as power on / off, input signal switching, and display / non-display of a menu screen for performing various settings.

  Next, an operation for driving the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 so as to obtain the focus amount, the zoom amount, and the lens shift amount stored in the adjustment amount storage unit 27 (hereinafter, referred to as “the focus amount adjustment mechanism”). (Referred to as “lens adjustment amount restoration operation”). It is assumed that the lens adjustment amount restoration operation is performed from the menu screen by the user operating the operation receiving unit 21 or the remote controller 50.

  FIG. 6 is an explanatory diagram of a lens adjustment amount restoration operation menu screen. The lens adjustment amount restoration operation menu screen M4 is a menu screen for causing the user to restore the three lens adjustment amounts of the focus amount, the zoom amount, and the lens shift amount of the projector 1. The lens adjustment amounts to be restored are the focus amount, the zoom amount, and the lens shift amount stored in the adjustment amount storage unit 27. In the present embodiment, the lens adjustment amount restoration operation menu screen M4 is displayed as OSD, and the control unit 20 instructs the OSD processing unit 32 to display it.

  As shown in FIG. 6, a character string “Restoring the lens adjustment amount” indicating the lens adjustment amount restoration operation menu screen is displayed at the top of the lens adjustment amount restoration operation menu screen M4. . Below that, a character string “Do you want to restore the adjustment amount of the lens adjustment mechanism (focus, zoom, lens shift)?” For explaining the restoration operation of the lens adjustment amount is displayed. Furthermore, in the center of the screen, there are displayed options of “do not restore” and “restore”. In the lower part of the screen, an explanation about the key input procedure is displayed.

  When the user operates the operation accepting unit 21 or the remote controller 50 and selects “Do not restore” on the screen, the control unit 20 does not restore the lens adjustment amount. When the user selects “restore”, the control unit 20 instructs the focus control unit 24, the zoom control unit 25, and the lens shift control unit 26 to store the focus stored in the adjustment amount storage unit 27. The focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 are driven so that the amount, the zoom amount, and the lens shift amount are obtained.

Next, a process when the projector 1 receives a lens adjustment amount restoration operation will be described. Here, the restoration operation of the lens adjustment amount corresponds to the third operation signal.
FIG. 7 is a flowchart of processing when the projector 1 receives a lens adjustment amount restoration operation.

  When a lens adjustment amount restoration operation is accepted through the lens adjustment amount restoration operation menu screen M4 (step S301), the control unit 20 determines whether or not adjustment amount information is stored in the adjustment amount storage unit 27 (step S301). Step S302). If the adjustment amount information is stored (step S302: YES), the control unit 20 issues an instruction to the focus control unit 24, the zoom control unit 25, and the lens shift control unit 26, and stores the instruction in the adjustment amount storage unit 27. The focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 are driven so that the focus amount, the zoom amount, and the lens shift amount are set (step S303).

  If the adjustment amount information is not stored (step S302: NO), the control unit 20 displays a lens adjustment amount non-storage message screen indicating that the adjustment amount information is not stored (step S304). Then, the processing when the projector 1 receives the lens adjustment amount restoration operation is ended.

Here, the lens adjustment amount unstored message screen indicating that the lens adjustment amount is not stored will be described.
FIG. 8 is an explanatory diagram of a lens adjustment amount not stored message screen. As shown in FIG. 8, a character string “lens adjustment amount information is not stored” is displayed on the lens adjustment amount unstored message screen M5.

  As described above, when the projector 1 accepts a lens adjustment amount restoration operation, the projector 1 can restore the lens adjustment amount if the adjustment amount information is stored.

According to the embodiment described above, the following effects can be obtained.
(1) When the projector 1 receives a lens adjustment prohibition setting operation, the projector 1 switches to a lens adjustment prohibition state in which adjustment operations (operations) by the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 are prohibited. . Thereby, in the lens adjustment prohibited state, the lens adjustment operation by the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 is prohibited, so that the focus amount, the zoom amount, and the lens shift amount are erroneously changed. Can be prevented. Further, since the user cannot perform the lens adjustment operation using either the operation accepting unit 21 or the remote controller 50, it is possible to prevent the focus amount, the zoom amount, and the lens shift amount from being changed. Even in the lens adjustment prohibition state, the user can set and change various functions other than the lens adjustment operation, which improves convenience.

  (2) When the lens adjustment prohibition state is received when the projector 1 receives the lens adjustment start signal, the projector 1 displays the lens adjustment prohibition message screen M2 or the lens adjustment prohibition icon screen M3. This is beneficial because the user who has transmitted the lens adjustment start signal can recognize that the lens adjustment is prohibited.

  (3) Upon receiving the lens adjustment prohibition setting operation, the projector 1 stores the focus amount, the zoom amount, and the lens shift amount in the adjustment amount storage unit 27. When the projector 1 receives the lens adjustment amount restoration operation, the projector 1 adjusts the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the focus amount, the zoom amount, and the lens shift amount stored in the adjustment amount storage unit 27. And the lens shift adjusting mechanism 133 is driven. As a result, even when the lens adjustment amount is changed by mistake, the user can return to the desired adjustment amount by the restoration operation of the lens adjustment amount, which improves convenience.

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

  (Modification 1) In the above embodiment, the projector 1 prohibits the adjustment of the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 by the lens adjustment prohibition setting operation, but the focus adjustment mechanism 131, At least one of the zoom adjustment mechanism 132 and the lens shift adjustment mechanism 133 may be prohibited. For example, the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 may be individually set to prohibit adjustment.

  (Modification 2) In the above embodiment, the projector 1 restores the focus amount, the zoom amount, and the lens shift amount by the restoration operation of the lens adjustment amount. However, the focus amount, the zoom amount, and the lens shift amount are restored. Of these, at least one of them may be restored. For example, the focus adjustment mechanism 131, the zoom adjustment mechanism 132, and the lens shift adjustment mechanism 133 may be restored individually.

  (Modification 3) In the above embodiment, the projector 1 stores the focus amount, the zoom amount, and the lens shift amount in the adjustment amount storage unit 27 using the lens adjustment prohibition setting operation as the first operation signal. The focus amount, zoom amount, and lens shift amount may be stored in the adjustment amount storage unit 27 by another predetermined operation or a predetermined signal. In this way, the focus amount, the zoom amount, and the lens shift amount can be stored in the adjustment amount storage unit 27 at a desired timing. A plurality of focus amounts, zoom amounts, and lens shift amounts may be stored in the adjustment amount storage unit 27. In this way, the focus amount, zoom amount, and lens shift amount of the projector 1 can be stored and restored according to the installation location.

  (Modification 4) In the embodiment described above, the projector 1 is assumed to be operated by the operation reception unit 21 or the remote controller 50 for the lens adjustment start signal, the lens adjustment prohibition setting operation, and the lens adjustment amount restoration operation. However, the projector 1 further includes a communication unit (not shown), and uses predetermined communication means to send a lens adjustment start signal, a lens adjustment prohibition setting operation signal, and lens adjustment from an external electronic device such as a computer. A volume restoration operation signal may be received. The predetermined communication means used by the communication unit may be a communication means using IP (Internet Protocol) network communication, or a communication means using communication by RS-232C or USB. Moreover, it is not limited to these, You may use another communication means.

  (Modification 5) In the above embodiment, the communication means between the remote controller 50 and the signal receiving unit 22 is a communication means by infrared communication, but is not limited to this. For example, communication means using radio waves for wireless communication may be used.

  (Modification 6) In the above embodiment, the transmissive liquid crystal light valve 12 is used as the light modulator, but a reflective light modulator such as a reflective liquid crystal light valve can also be used. In addition, it is possible to use a micromirror array device that modulates light emitted from a light source by controlling the emission direction of incident light for each micromirror as a pixel.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 10 ... Image projection part, 11 ... Light source, 12 ... Liquid crystal light valve, 13 ... Projection lens, 13a ... Focus lens, 13b ... Zoom lens, 14 ... Light valve drive part, 20 ... Control part, 20a ... Lens Adjustment state flag, 21 ... operation accepting unit, 22 ... signal receiving unit, 23 ... light source control unit, 24 ... focus control unit, 25 ... zoom control unit, 26 ... lens shift control unit, 27 ... adjustment amount storage unit, 30 ... Image signal input unit 31 ... Image processing unit 32 ... OSD processing unit 50 ... Remote control 131 ... Focus adjustment mechanism 132 ... Zoom adjustment mechanism 133 ... Lens shift adjustment mechanism M1 ... Lens adjustment mechanism operation prohibition setting menu Screen, M2 ... Lens adjustment prohibition message screen, M3 ... Lens adjustment prohibition icon screen, M4 ... Lens adjustment amount restoration operation menu Surface, M5 ... lens adjustment amount unstored message screen.

Claims (6)

A light source;
A light modulation device that modulates light emitted from the light source into image light according to an image signal;
A projection lens that projects the image light modulated by the light modulator;
A lens adjustment mechanism that performs a predetermined adjustment operation on the projection lens;
An operation reception unit for receiving operation signals;
A control unit that switches to a lens adjustment prohibition state that prohibits the predetermined adjustment operation by the lens adjustment mechanism when the operation reception unit receives a first operation signal;
A projector comprising: The projector according to claim 1,
The predetermined adjustment operation by the lens adjustment mechanism is:
A projector characterized by a focus adjustment operation for focus adjustment, a zoom adjustment operation for adjusting a projection angle of view, or a lens shift adjustment operation for adjusting a projection position of an image by moving the projection lens. . The projector according to claim 1 or 2,
In the lens adjustment prohibition state, when the operation reception unit receives a second operation signal for causing the lens adjustment mechanism to perform the predetermined adjustment operation, a screen indicating that the lens adjustment prohibition state is displayed. A projector further comprising an adjustment prohibition display control unit for projection. The projector according to any one of claims 1 to 3,
An adjustment amount storage unit capable of storing adjustment amount information in the predetermined adjustment operation by the lens adjustment mechanism;
When the operation accepting unit accepts the first operation signal, the control unit stores the adjustment amount information in the adjustment amount storage unit,
The control unit causes the lens adjustment mechanism to perform the predetermined adjustment operation according to the adjustment amount information stored in the adjustment amount storage unit when the operation reception unit receives a third operation signal. Projector. A projector according to any one of claims 1 to 4,
In the lens adjustment prohibited state, the control unit executes control other than the predetermined adjustment operation of the lens adjustment mechanism based on the operation signal. A light source, a light modulation device that modulates light emitted from the light source into image light according to an image signal, a projection lens that projects the image light modulated by the light modulation device, and the projection lens A projector adjustment method comprising: a lens adjustment mechanism that performs a predetermined adjustment operation; and an operation reception unit that receives an operation signal,
A first operation receiving step of receiving a first operation signal by the operation receiving unit;
A control step of switching to a lens adjustment prohibited state for prohibiting the predetermined adjustment operation by the lens adjustment mechanism when the first operation signal is received in the first operation reception step;
A projector control method comprising:

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