JP2010003385A - Image display unit and power supply control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology to improve user's convenience for using an image display unit having: an information medium driving section to read information stored in a removable information medium; and a power supply. <P>SOLUTION: The image display unit includes the power supply for outputting a power required to operate the image display unit based on a power inputted from a commercial power supply, a display section, the information medium-driving section for detecting a loaded removable information medium and reading the information stored in the information medium, an image processing section, and a control section for controlling the power supply. The control section informs that the information medium is loaded when the information medium is loaded in the information medium-driving section and a first stop command is issued to stop the power output from the power supply, and after informing, stops the power output from the power supply when a second stop command is issued to stop the power output from the power supply. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image display apparatus including an information medium driving unit that reads information stored in a removable information medium, and a power supply unit.

  For example, when using an optical disc player configured to be able to play back an optical disc such as a DVD (Digital Versatile Disc), the user operates the power switch with the optical disc in the optical disc drive to turn off the power. There is. In an optical disk player, when the power is turned off, it is difficult to determine whether or not an optical disk is in the optical disk drive. Therefore, for example, when the optical disk is a product borrowed from a rental company, the user may not notice that he forgot to take out the optical disk from the optical disk player, and may return only the storage case to the rental company. In order to solve such a problem, a technique has been proposed in which an alarm sound is output when a user performs an operation to turn off the power while an optical disk is inserted (see, for example, Patent Document 1).

JP-A-63-217568

  However, in the configuration described in Patent Document 1, since an alarm sound is generated and the power is turned off, when the user notices the alarm sound and tries to take out the optical disk, it is necessary to turn on the power again. The user may have to wait for a long time until the optical disk player is started in order to take out the optical disk, which is inconvenient.

  Therefore, in view of the above-described problems of the prior art, the present invention provides a user who uses an image display device that includes an information medium drive unit that reads information stored in a removable information medium and a power supply unit. An object is to provide a technique for improving convenience.

  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 An image display device,
A power supply unit that outputs power required for the operation of the image display device based on power input from a commercial power supply;
A display unit;
An information medium driving unit that detects whether or not a removable information medium is mounted and reads information stored in the information medium;
An image processing unit for displaying an image on the display unit based on the information read by the information medium driving unit;
A control unit for controlling the power supply unit;
With
The controller is
When the information medium is attached to the information medium drive unit and the first stop instruction is issued to stop the output of power from the power supply unit, the information medium is attached. An image display for stopping the output of power from the power supply unit when a second stop instruction is issued to stop the output of power from the power supply unit after the notification. apparatus.

  According to this image display apparatus, when the user tries to stop the output of power from the power supply unit with the information medium loaded, an instruction to stop the output of power (for example, the remote controller The power output is not stopped unless the power button is operated twice. Therefore, when the user takes out the information medium after the first stop instruction, since the power is still supplied from the power supply unit to the information medium driving unit, the user does not need to turn on the power. The information medium can be taken out quickly and easily, and the convenience for the user can be improved.

Application Example 2 In the image display device according to Application Example 1,
The controller is
An image display device that displays a message indicating that the information medium is mounted on the display unit as a notification that the information medium is mounted.

  In this way, the user can perceive that the information medium is mounted by visually recognizing the message displayed on the display unit.

Application Example 3 In the image display device according to Application Example 1 or 2,
The controller is
After notifying that the information medium is loaded, if the predetermined time has passed without the second stop instruction being given again, the notification is stopped and the first An image display device that invalidates the second stop instruction.

  In this case, when a predetermined time elapses after the first stop instruction is given and the image display apparatus informs that the information medium is loaded, and the user does not perform any operation. The power output from the power supply unit is continued. Then, since the first stop instruction is invalidated, for example, when a user who notices that the output of power from the power supply unit is continued operates the power key of the remote controller, the power off instruction is This corresponds to the first stop instruction, and it is notified again that the information medium is loaded. Therefore, the possibility that the user notices that the information medium remains is improved.

Application Example 4 In the image display device according to any one of Application Examples 1 to 3,
The display unit
A light source;
A modulator for modulating light from the light source;
A projection lens that projects the image formed by the modulated light onto a projection surface;
An image display device comprising:

Application Example 5 In the image display device according to Application Example 4,
The display unit further includes a light blocking unit for blocking light output through the projection lens,
The control unit stops output of power from the power source unit when the first stop instruction is given when the light is blocked by the light blocking unit, regardless of whether the information medium is attached or not. , Image display device.

  For example, when the light is shielded by the light shielding unit, a message indicating that the information medium is loaded is not displayed, and the user may not notice that the information medium is loaded and may not perform any operation. is there. In that case, if the output of the power from the power supply unit is left without being stopped, the image display device may be damaged due to heat generation of the light source, or the projection lens may be deformed.

  On the other hand, according to the image display device of the application example 5, when the light is shielded by the light shielding unit, the information medium is mounted, and even if there is no second stop instruction, Since the output of power from the power supply unit is stopped, it is possible to reduce the above-described problems such as damage to the image display device and deformation of the projection lens.

  The present invention is not limited to the above-described aspects of the image display apparatus, but various aspects such as a power supply control method, a computer program for realizing the functions of these methods or apparatuses, and a recording medium on which the computer program is recorded. Can be realized.

Hereinafter, the best mode for carrying out the present invention will be described in the following order based on examples.
A. Example:
A-1. Example configuration:
A-2. Example operation:
A-3. Effects of the embodiment Variation:

A. Example:
A-1. Configuration of Embodiment FIG. 1 is a block diagram showing a configuration of a projector 100 as an embodiment of the present invention. The projector 100 projects image light representing an image and displays the image on a screen (not shown). The projector 100 includes a power supply unit 10, a CPU 20, an image processing unit 30, a memory 40, an external signal input unit 50, an optical disc driving unit 60, a remote control control unit 70, a timer unit 90, and a light source lamp 82. A liquid crystal panel 84 and a projection optical system 86. As shown in the figure, the power supply unit 10, the CPU 20, the image processing unit 30, the memory 40, the external signal input unit 50, the optical disk drive unit 60, the remote controller control unit 70, and the timer unit 90 are connected to a bus 98. Are connected to each other. The projector 100 in this embodiment corresponds to the image display device in the claims.

  The power supply unit 10 receives a commercial power supply 200 such as AC100V, generates a DC power supply voltage necessary for various operations of the projector 100, and generates a light source driving power for driving the light source lamp 82. Supply (output) power to

  The CPU 20 reads out and executes the control program stored in the memory 40, thereby controlling the operation of each unit in the projector 100. Further, as will be described later, the power supply unit 10 is controlled in accordance with an instruction from the user received through the remote control unit 70. The CPU 20 in this embodiment corresponds to a control unit in the claims.

  The image processing unit 30 performs image processing on the image data supplied from the external signal input unit 50 or the optical disc driving unit 60 and supplies the processed image data to the liquid crystal panel 84.

  The external signal input unit 50 is, for example, image data and sound based on image and sound data supplied from the outside such as a PC (personal computer), an optical disc player, an external memory, etc. connected to an external connection connector (not shown). Data is generated and supplied to the image processing unit 30 and a sound processing unit (not shown).

  The optical disk drive unit 60 is configured to be able to mount an optical disk 300 such as a DVD or a BD (Blu-ray Disc (registered trademark)), for example, and is based on video and audio data read from the mounted optical disk 300. Then, image data and sound data are generated and supplied to the image processing unit 30 and a sound processing unit (not shown). Further, whether or not the optical disk 300 is mounted is detected, and the detection result is supplied to the CPU 20. The optical disk drive unit 60 in this embodiment corresponds to the information medium drive unit in the claims, and the optical disk 300 corresponds to the information medium in the claims.

  The remote controller control unit 70 receives an instruction from the user through the remote controller 72 and transmits the instruction to the CPU 20 via the bus 98. In the present embodiment, the projector 100 receives an instruction from the user through the remote controller 72 and the remote controller control unit 70. However, it is assumed that the instruction from the user is received through another configuration such as an operation panel. Is also possible.

  The light source lamp 82 irradiates the liquid crystal panel 84 with light, and performs a lighting operation with light source driving power generated by the power supply unit 10. The liquid crystal panel 84 includes a transmissive liquid crystal panel and a liquid crystal panel driving unit, modulates light emitted from the light source lamp 82 based on image data given from the image processing unit 30, and emits light representing an image. .

  The projection optical system 86 includes a projection lens 861 and a lens shutter 862, and projects light emitted from the liquid crystal panel 84 onto a screen (not shown). As a result, an image is displayed on the screen. The lens shutter 862 is provided in front of the projection lens 861 included in the projection optical system 86, and opens and closes the lens shutter 862 to allow light representing an image emitted through the lens to pass or be blocked. . As the lens shutter 862, for example, two light shielding plates are provided in front of the projection lens 861 (that is, outside the projection lens 861), and the posture of the light shielding plate is controlled by a rotating gear to open and close the light shielding plate. Use things. In addition, a method using three or more shading plates or a method of opening and closing a lens cover-like one may be used.

  For example, during a presentation using the projector 100, there is a case where it is desired to temporarily stop the projection of the projector during the explanation, for example, in order to enhance the presentation effect or prevent the presenter from being dazzled. There are methods to stop the projection of the projector, such as converting the image signal to black (all black) or turning off the power, but these methods require time to resume projection and are complicated to operate. is there. On the other hand, if the front of the projection lens is blocked by the lens shutter, the light is blocked, so that the projection of the image can be controlled only by opening and closing the lens shutter without performing complicated operations of the projector.

  The light source lamp 82 in this embodiment corresponds to the light source in the claims, and the liquid crystal panel 84 corresponds to the modulation section in the claims. Further, the light source lamp 82, the liquid crystal panel 84, and the projection optical system 86 in this embodiment correspond to a display unit in the claims.

A-2. Example operation:
FIG. 2 is a flowchart for explaining the flow of the power supply stop process in the projector 100 according to the present embodiment. First, a case where the user gives an instruction to turn off the power using the remote controller 72 with the optical disc 300 mounted on the optical disc drive unit 60 of the projector 100 will be described as an example.

  When the CPU 20 receives a power-off instruction (corresponding to the first stop instruction in the claims) from the user via the remote control unit 70 (step S102), the CPU 20 determines whether or not the power-off instruction is in the sleep mode. (Step S104). The sleep mode is a mode in which a power-off instruction is automatically given at a time specified by the user. The operation when the sleep mode is set will be described later.

  When CPU 20 determines that it is not a power-off instruction in the sleep mode (No in step S104), CPU 20 determines whether or not optical disk 300 is loaded in optical disk drive unit 60 (step S106). Specifically, the CPU 20 controls the optical disc driving unit 60 to detect whether or not the optical disc 300 is loaded. The CPU 20 determines whether or not the optical disc 300 is mounted based on the detection result output from the optical disc driving unit 60.

  If the CPU 20 determines that the optical disk 300 is loaded (Yes in step S106), the CPU 20 controls the image processing unit 30 to show a message image 400 that is prepared in advance and indicates that the optical disk 300 is loaded. The image data is output to the liquid crystal panel 84. The liquid crystal panel 84 modulates the light from the light source lamp 82 based on the image data output from the image processing unit 30, and a message image indicating that the optical disk 300 is mounted on the screen via the projection optical system 86. 400 is displayed (step S108).

  FIG. 3 is an explanatory diagram showing a message image 400 displayed on the screen. As shown in the figure, in the message image 400, a message “A disc is inserted. Do you want to turn off the power?”, An instruction to turn off the power “Yes: Press the power”, and an instruction to turn off the power. Includes “No: Press other buttons”.

  Subsequently, the CPU 20 determines whether or not the lens shutter 862 is closed (step S108). Specifically, the CPU 20 controls the projection optical system 86 to detect opening / closing of the lens shutter. For example, the projection optical system 86 includes a position sensor (not shown) that detects the opening / closing position of a light shielding plate provided in the lens shutter, and detects the opening / closing of the lens shutter by the position sensor. The CPU 20 determines whether the lens shutter is opened or closed based on the detection result output from the projection optical system 86.

  When CPU 20 determines that the lens shutter is open (No in step S110), CPU 20 determines whether or not the power supply key is operated on remote controller 72 (step S112). If there is no power key operation (No in step S112), the presence / absence of another key operation is determined (step S114), and if there is no other key operation (No in step S114), a message is displayed. From (Step S108), it is determined whether 7 seconds have passed (Step S116).

  If CPU 20 determines that 7 seconds have not elapsed (No in step S116), it returns to step S110. That is, after displaying the message (step S108), the CPU 20 repeats the processes of steps S110 to S116 until the lens shutter 862 is closed or any key operation is not performed until 7 seconds elapse. In this embodiment, in step S116, it is determined whether or not 7 seconds have elapsed since the message image 400 was displayed in step S108. However, the elapsed time is not limited to 7 seconds, and is desired. It is possible to set the time.

  As described above, since the lens shutter 862 is open, the message image 400 is projected onto the screen, so that the user recognizes that the optical disk 300 is still mounted in the optical disk drive unit 60. For example, when the user intends to turn off the power after removing the optical disc 300, the user operates other keys without operating the power key of the remote controller 72. When the CPU 20 receives information that a key other than the power key has been operated via the remote control unit 70, the CPU 20 controls the image processing unit 30 to stop displaying the message image 400 (step S118), and step S102. Return to.

  The user takes out the optical disk 300 from the optical disk drive unit 60 and operates the power key of the remote controller 72 again. When receiving a power-off instruction via the remote control unit 70 (step S102), the CPU 20 determines that it is not in the sleep mode (No in step S104), and determines the presence or absence of the optical disc 300 (step S104). Step S106).

  As described above, since the optical disk 300 has been taken out and is not mounted on the optical disk drive unit 60, the CPU 20 controls the optical disk drive unit 60 to detect whether or not the optical disk 300 is mounted. The unit 60 sends the detection result indicating no optical disk to the CPU 20. When CPU 20 determines that there is no optical disk based on the detection result from optical disk drive unit 60 (No in step S106), CPU 20 controls light source lamp 82 to perform a cool-down process (step S120). To stop the power supply to each part of the projector 100 (step S122). Thereby, the power supply stop process of the projector 100 ends.

  Note that after the message image 400 is displayed on the screen, the user may operate the power key of the remote controller 72 after removing the optical disc 300 from the optical disc drive unit 60. If the power key operation by the user is within 7 seconds after the message image 400 is displayed in step S108, the CPU 20 instructs the power off from the user via the remote control unit 70 (second claim in the claims). (Corresponding to the second stop instruction) is received, and it is determined that the power key is operated (Yes in step S112), the process proceeds to step S120, the light source lamp 82 is controlled, and a cool-down process is performed (step S120). Then, the power supply unit 10 is controlled to stop the power supply to each unit of the projector 100 (step S122). Thereby, the power supply stop process of the projector 100 ends.

  So far, the case where the user turns off the power after removing the optical disc 300 when confirming the message image 400 has been described as an example. Next, a case where the user confirms the message image 400 but turns off the power without taking out the optical disc 300 will be described as an example. For example, it is assumed that the user wants to keep the optical disk 300 in the optical disk drive unit 60, such as when viewing the contents of the optical disk 300 halfway and viewing the continuation on another day.

  CPU20 performs the process of step S102-108, and displays the message image 400 (FIG. 3) on a screen (not shown). Since the user wants to turn off the power while the optical disk 300 is still in the optical disk drive unit 60, the user operates the power key of the remote controller 72. When the CPU 20 receives the fact that the power key of the remote control 72 has been operated (corresponding to the second stop instruction in the claims) via the remote control unit 70 (Yes in step S112), the CPU 20 controls the light source lamp 82. Then, a cool-down process is performed (step S120), the power supply unit 10 is controlled, and the power supply to each unit of the projector 100 is stopped (step S122). Thereby, the power supply stop process of the projector 100 ends.

  Subsequently, an example in which the message image 400 (FIG. 3) is displayed on a screen (not shown), but the user does not notice the message image 400 and then 7 seconds have elapsed without any key operation. Will be described. When the user operates the power key of the remote controller 72 while the optical disk 300 remains in the optical disk drive unit 60 (corresponding to the first stop instruction in the claims), the CPU 20 controls the remote controller control unit 70. Then, the power-off instruction is received, and the processing of steps S102 to S108 is performed to display the message image 400 (FIG. 3) on a screen (not shown).

  As described above, since the user does not notice the message image 400 and does not perform any key operation, the CPU 20 performs the processing of steps S110 to S116 until 7 seconds have elapsed after the message image 400 is displayed. repeat. When CPU 20 determines that 7 seconds have elapsed (Yes in step S116), CPU 20 controls image processing unit 30 to stop displaying message image 400 (step S118), and returns to step S102. That is, the first stop instruction is invalidated, and the CPU 20 waits for a power-off instruction to be input.

  Next, a case where the optical disk 300 is mounted on the optical disk drive unit 60 of the projector 100 and the user operates the power key of the remote controller 72 with the lens shutter 862 closed will be described as an example. . For example, the user uses the projector 100 to display an image stored on the optical disc 300 on the screen, and during the presentation, the user closes the lens shutter to stop the display of the image, and directly uses the remote controller 72. A case where the power key is operated to turn off the power is assumed.

  When the user operates the power key of the remote controller 72, the CPU 20 receives a power-off instruction (corresponding to the first stop instruction in the claims) via the remote controller control unit 70 (step S102), and proceeds to step S104. move on. If CPU 20 determines that it is not in the sleep mode (No in step S104), it determines whether or not there is an optical disk (step S106). As described above, when the detection result indicating that there is an optical disk is received from the optical disk drive unit 60 (Yes in step S106), the message image 400 is displayed (step S108).

  Subsequently, it is determined whether the lens shutter 862 is opened or closed (step S110). As described above, the CPU 20 determines whether the lens shutter 862 is opened or closed based on the detection result output from the projection optical system 86. If the CPU 20 determines that the lens shutter 862 is closed (Yes in step S110), the process proceeds to step S120, the light source lamp 82 is controlled, the cool-down process is performed, the power source unit 10 is controlled, and the projector is controlled. The power supply to each unit of 100 is stopped (step S122). Thereby, the power supply stop process of the projector 100 ends. That is, when the lens shutter 862 is closed, even if the optical disk 300 is in the optical disk drive unit 60, even if there is no second stop instruction (power key operation by the user), Stop supplying.

  Next, a case where the user has set the power to be turned off at a predetermined time in the sleep mode will be described as an example. When the user sets the sleep mode so that the power is turned off at a predetermined time using the remote controller 72, the CPU 20 recognizes that the sleep mode is set via the remote control control unit 70, and the timer unit 90 is controlled to start the time count. The timer unit 90 inputs a power-off instruction to the CPU 20 at the set time.

  When the CPU 20 accepts the power-off instruction (step S102) and determines that it is in the sleep mode (Yes in step S104), the CPU 20 proceeds to step S120 and controls the light source lamp 82 to perform the cool-down process. The unit 10 is controlled to stop the power supply to each unit of the projector 100 (step S122). Thereby, the power supply stop process of the projector 100 ends. That is, when the sleep mode is set, there is no second stop instruction (power key operation by the user) at the set time regardless of the presence or absence of the optical disc 300 in the optical disc drive unit 60. However, the power supply from the power supply unit 10 is stopped.

  Finally, a case where the user instructs to turn off the power using the remote controller 72 after taking out the optical disc 300 will be described as an example. When the CPU 20 receives a power-off instruction from the user via the remote control unit 70 (step S102), the CPU 20 determines whether or not the power-off instruction is in the sleep mode (step S104), and is not a power-off instruction in the sleep mode. If it is determined (No in step S104), it is determined whether or not the optical disc 300 is loaded in the optical disc drive unit 60 (step S106). When the CPU 20 receives the detection result indicating that the optical disk 300 is not installed from the optical disk drive unit 60 and determines that the optical disk 300 is not present (No in step S106), the CPU 20 proceeds to step S120, controls the light source lamp 82, and performs a cool-down process. Then, the power supply unit 10 is controlled to stop the power supply to each unit of the projector 100 (step S122). Thereby, the power supply stop process of the projector 100 ends. That is, if the optical disc 300 is not in the optical disc drive unit 60 when the power-off instruction is input, the power supply from the power source unit 10 can be performed even if there is no second stop instruction (power key operation by the user). Is stopped.

A-3. Effects of the embodiment:
According to the projector 100 of the present embodiment, even when the user instructs to turn off the power using the remote controller 72 when the optical disk 300 is still in the optical disk drive unit 60, the power supply unit 10 is immediately turned on. First, a message image 400 indicating that the optical disk 300 is still inserted is displayed. Therefore, the user can recognize that the optical disk 300 is still mounted by looking at the image.

  In the projector 100 according to the present embodiment, the power supply from the power supply unit 10 is not stopped immediately after the message image 400 is displayed, but the user again uses the remote controller 72 to turn off the power supply. If not, the power supply from the power supply unit 10 is not stopped.

  If the projector is configured to stop the power supply from the power supply unit immediately after displaying the message image, the user cannot take out the optical disk immediately even if he / she tries to remove it. The user must turn on the power again and wait for the projector to be activated before taking out the optical disk.

  On the other hand, according to the projector 100 of the present embodiment, when the user views the message image 400 and recognizes that the optical disk 300 is still mounted, the user can quickly and easily remove the optical disk 300. Since it can be taken out, user convenience is improved.

  Also, if the power supply from the power supply unit is stopped immediately after the projector displays the message image on the screen and the user removes the optical disk, the following problems may occur. For example, the first user may turn off the power while the first optical disc is still in the projector and leave the message image without confirming it. At that time, when a second user who is a third party tries to play back the second optical disk with the projector, the first optical disk remains in the projector. The operation of taking out the optical disk 1 is performed. Then, the power supply from the power supply unit is stopped, which is inconvenient because the second user must turn on the power again and wait for the projector to be activated.

  On the other hand, in the projector 100 of the present embodiment, even if the user takes out the optical disc 300 after the message image 400 is displayed, the power supply from the power supply unit 10 is not stopped immediately, and the user again The power supply from the power supply unit 10 is not stopped unless a power-off instruction is given using the remote controller 72. Therefore, even in the case described above, the second user can quickly and easily play and view the second optical disk after inserting the second optical disk, thereby improving user convenience. Is done.

  In addition, if a predetermined time elapses after the projector displays a message image on the screen and the user does not perform any key operation, the power supply from the power supply unit is stopped. May not be aware that the optical disk is still in the storage.

  On the other hand, in the projector 100 of the present embodiment, after the projector 100 displays the message image 400 on the screen, when a predetermined time (7 seconds) elapses before the user performs any key operation. Does not stop the power supply from the power supply unit 10, stops the display of the message image 400, returns to step S102, and waits for the power-off instruction to be input. That is, after the projector 100 displays the message image 400 on the screen, the power supply from the power supply unit 10 continues even if a predetermined time (7 seconds) elapses before the user performs any key operation. Is done. Then, since light is emitted from the light source lamp 82, a default image such as a so-called blue background or some image is displayed on the screen.

  Therefore, the possibility that the user notices that the power supply from the power supply unit 10 is continued is improved. Then, a user who notices that the power supply from the power supply unit 10 is continued, operates the power key, and inputs a power-off instruction (corresponding to the first stop instruction in the claims) to the CPU 20. Then, since the message image 400 is displayed again on the screen, the possibility that the user notices that the optical disc 300 is still inserted is improved.

  Further, even if the projector lens shutter is closed, if the optical disk drive unit has an optical disk inserted, the power supply from the power supply unit will not be stopped unless the user operates the power key again. The following problems may occur. In the projector, when the lens shutter is closed, even if the CPU controls the image processing unit to display the message image, the message image is not displayed on the screen because it is shielded by the lens shutter. Therefore, the user does not notice that the optical disk 300 remains in the optical disk drive unit.

  Further, since the user does not see the message image, the user does not perform any key operation. Then, the power supply from the power supply unit is continued in the projector. However, since the light is shielded by the lens shutter and nothing is displayed on the screen, the user may not notice that the power supply from the power supply unit is continued. If the projector is left in a state where the power supply from the power supply unit is continued, the projector may be damaged due to heat generated by the light source lamp, or the projection lens may be deformed.

  On the other hand, according to the projector 100 of the present embodiment, when the lens shutter 862 is closed, there is no second power-off instruction even if the optical disk 300 remains in the optical disk drive unit 60. However, since the power supply from the power supply unit 10 is stopped, it is possible to reduce the above-described problems such as damage to the projector and deformation of the projection lens.

B. Variation:
The present invention is not limited to the above-described embodiments, and can be carried out in various modes without departing from the gist thereof.

  (1) In the above-described embodiment, the projector 100 modulates the light from the light source lamp 82 using the transmissive liquid crystal panel 84, but is not limited to the transmissive liquid crystal panel 84. Modulates light from a light source lamp using a micromirror device (DMD (registered trademark): Digital Micro-Mirror Device), a reflective liquid crystal panel (LCOS (registered trademark): Liquid Crystal on Silicon), or the like. It may be configured.

  (2) In the above-described embodiment, the projector 100 has exemplified the configuration in which the message image 400 is projected on the screen as a means for notifying that the optical disk 300 is mounted on the optical disk drive unit 60. It may be configured, may be configured to output an alarm, and can be notified by various other known methods. Even if it does in this way, the effect similar to an above-mentioned Example can be acquired.

  (3) In the above-described embodiment, the case where the optical disc 300 such as a DVD or a BD is reproduced using the projector 100 and an image is displayed on the screen is exemplified. However, as the optical disc 300, a CD (Compact Disc: Compact Disc) Disc) and the projector 100 may be used to play music and voice. For example, when a music CD is reproduced using the projector 100, if the light source lamp 82 is not driven, a configuration in which the optical disk 300 is mounted on the optical disk drive unit 60 is notified by voice or an alarm. That's fine. Even in this case, the user can recognize that the optical disc 300 is inserted in the projector 100, and then can remove the optical disc 300 without turning on the power again. Is improved.

  (4) In the above-described embodiment, the projector 100 is illustrated as having the lens shutter 862. However, the projector 100 may be configured without the lens shutter 862. Even if it is such a structure, the effect similar to the above-mentioned Example can be acquired.

  (5) In the above-described embodiments, the projector 100 is exemplified as the image display device. However, the projector 100 is not limited to the projector. For example, a DVD player including a display unit such as a liquid crystal display, an organic EL display, or a plasma display can be attached and detached. This includes various image display devices that include an information medium driving unit that reads information stored in a possible information medium and a power source unit.

  (6) In the above-described embodiments, an optical disk is illustrated as a removable information medium. However, the removable information medium is not limited to an optical disk, and various information media such as a magnetic tape cartridge and a removable memory are available. Included in this.

1 is a block diagram showing a configuration of a projector 100 as an embodiment of the present invention. It is a flowchart for demonstrating the flow of the electric power supply stop process in the projector 100 of a present Example. It is explanatory drawing which shows the message image 400 displayed on a screen.

Explanation of symbols

10 ... Power supply unit 20 ... CPU
DESCRIPTION OF SYMBOLS 30 ... Image processing part 40 ... Memory 50 ... External signal input part 60 ... Optical disk drive part 70 ... Remote control part 72 ... Remote control 82 ... Light source lamp 84 ... Liquid crystal panel 86 ... Projection optical system 90 ... Timer part 98 ... Bus 100 ... Projector DESCRIPTION OF SYMBOLS 200 ... Commercial power supply 300 ... Optical disk 400 ... Message image 861 ... Projection lens 862 ... Lens shutter

Claims (6)

An image display device,
A power supply unit that outputs power required for the operation of the image display device based on power input from a commercial power supply;
A display unit;
An information medium driving unit that detects whether or not a removable information medium is mounted and reads information stored in the information medium;
An image processing unit for displaying an image on the display unit based on the information read by the information medium driving unit;
A control unit for controlling the power supply unit;
With
The controller is
When the information medium is attached to the information medium drive unit and the first stop instruction is issued to stop the output of power from the power supply unit, the information medium is attached. An image display for stopping the output of power from the power supply unit when a second stop instruction is issued to stop the output of power from the power supply unit after the notification. apparatus. The image display device according to claim 1,
The controller is
An image display device that displays a message indicating that the information medium is mounted on the display unit as a notification that the information medium is mounted. The image display device according to claim 1 or 2,
The controller is
After notifying that the information medium is loaded, if the predetermined time has passed without the second stop instruction being given again, the notification is stopped and the first An image display device that invalidates the second stop instruction. The image display device according to any one of claims 1 to 3,
The display unit
A light source;
A modulator for modulating light from the light source;
A projection lens that projects the image formed by the modulated light onto a projection surface;
An image display device comprising: The image display device according to claim 4,
The display unit further includes a light blocking unit for blocking light output through the projection lens,
The control unit stops output of power from the power source unit when the first stop instruction is given when the light is blocked by the light blocking unit, regardless of whether the information medium is attached or not. , Image display device. A power control method for controlling the power supply unit in an image display device including an information medium drive unit and a power supply unit that detects whether or not a detachable information medium is mounted and reads information stored in the information medium. There,
(A) a step of determining whether or not the information medium is mounted in the information driving unit when a first stop instruction is issued to stop the output of power from the power source unit;
(B) In the step (a), when it is determined that the information medium is mounted, a step of notifying that the information medium is mounted;
(C) When the second stop instruction for stopping the output of power from the power supply unit is made after the notification in the step (b), the output of power from the power supply unit is stopped. Process,
A power supply control method.

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