JP2011165546A - Projector, accumulated lighting time management system for projector, control method of projector and its control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector in which the accumulated lighting time is reset only when exchanged into a new lamp unit, to provide an accumulated lighting time management system for projector, and to provide a control method of the projector and its control program. <P>SOLUTION: The projector 1 modulates and projects light emitted from a lamp 11 of a detachable lamp unit 10 according to an image signal. The projector has an accumulated lighting time memory 23 which memorizes the accumulated lighting time of the lamp 11, and a control unit 20 which receives a reset code for resetting the accumulated lighting time. The control unit 20 resets the accumulated lighting time when the input reset code is one that is issued at first time based on an information unique to the lamp unit scheduled for exchange and an information showing the projector scheduling exchange of the lamp unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projector, a cumulative lighting time management system for a projector, a projector control method, and a control program therefor.

  There is known a projector that counts the cumulative lighting time of a lamp and prompts the replacement of the lamp unit by displaying a warning or the like when a predetermined cumulative lighting time has elapsed. The cumulative lighting time is stored in a rewritable nonvolatile memory such as an EEPROM.

  Normally, when a new lamp unit is replaced, the cumulative lighting time stored in the nonvolatile memory is automatically reset, and the lighting time for the new lamp is counted. However, when the lamp unit is replaced with a used lamp unit, the accumulated lighting time may be reset in the same way as when the lamp unit is replaced with a new lamp unit, and the accurate lamp life time cannot be warned. There is.

  Patent Document 1 proposes a projector having a lamp unit with a memory for storing the lamp lighting time. According to Patent Document 1, when the lamp is replaced, there is no fear that the lighting time of the lamp will be lost, and the accurate lighting time of the lamp can be known.

JP 2000-267061 A

  However, as described in Patent Document 1, when the lamp unit includes a memory for storing the lamp lighting time, the cost of the lamp unit, which is a consumable item, is increased.

  Further, the user can manually reset the cumulative lamp operating time from the projector setting menu or the like. For this reason, there is a case where the user erroneously resets the accumulated lighting time even though the lamp unit is not actually replaced.

  The present invention has been made in order to solve the above-described problems. When a lamp unit is replaced with a used lamp unit without actually adopting a configuration that leads to an increase in the cost of the lamp unit, the lamp unit is actually replaced. The cumulative lighting time is prevented from being reset when it is not, and the projector is reset only when it is replaced with a new lamp unit, the cumulative lighting time management system for the projector, the projector control method, and its control The purpose is to provide a program.

The present invention that can solve the above-mentioned problems is a lighting that stores the cumulative lighting time of the lamp in a projector that projects the light emitted from the lamp of the detachable lamp unit according to the video signal. A time storage unit, and a control unit that receives a reset code for resetting the cumulative lighting time, wherein the control unit includes information specific to the lamp unit to be replaced and the lamp The cumulative lighting time is reset when it is first issued based on information indicating a projector scheduled for replacement of a unit.
According to the above configuration, since the reset code is issued first when the lamp unit is replaced with a new lamp unit, it is possible to provide a projector that resets the cumulative lighting time when the lamp is replaced with a new lamp unit. .

In the projector according to the aspect of the invention, when the input reset code is a code associated with a unique identification code given to each lamp unit and the unique identification information of the projector, It is preferable to reset the cumulative lighting time.
According to the above configuration, only the user who has the identification code and the identification information can acquire the reset code. For example, if a user uses a used lamp unit that has been used once but has not yet reached the end of its life, the reset code for the used lamp unit should already be issued at the first installation. Therefore, the reset code cannot be acquired again. In addition, even if an attempt is made to use the reset code issued at the time of the initial mounting, the identification information unique to the projector does not match, so it cannot be used. In addition, even if the lamp unit is not actually replaced, even if the user accidentally resets the cumulative lighting time, the reset code for the once installed lamp unit has already been issued at the first installation. The reset code cannot be obtained again. Therefore, the accumulated lighting time is prevented from being reset when it is replaced with a used lamp unit or when the lamp unit is not actually replaced, and only when it is replaced with a new lamp unit. Can be reset.

In the projector according to the aspect of the invention, the projector may further include a reset code storage unit that stores the reset code input when the lamp unit is replaced, and the control unit matches the newly input reset code. When a code is already stored in the reset code storage unit, it is preferable to output the error information without resetting the cumulative lighting time.
According to the above configuration, the same reset code can be prevented from being used multiple times by storing the input reset code. Therefore, even if the reset code is properly acquired, it is possible to suppress the repeated use of the code and to prevent the cumulative lighting time reset process from being performed unnecessarily.

Further, in the projector according to the aspect of the invention, the reset code is an encrypted code, and the control unit does not match the projector-specific identification information with the decryption code obtained by decrypting the reset code. Preferably, the error information is output without resetting the cumulative lighting time.
According to the above-described configuration, even if the user inputs an illegally acquired reset code, the accumulated lighting time cannot be reset if the identification information of the projector on which the lamp unit is mounted and the decryption code do not match. For this reason, it is possible to prevent the accumulated lighting time from being reset by unauthorized means.

In addition, a cumulative lighting time management system for a projector according to the present invention that can solve the above-described problems includes a reset code issuing device that issues a reset code for resetting the cumulative lighting time of a lamp, and the cumulative lighting time of the lamp. The lighting time storage unit to be stored and the reset code are received, and the input reset code is first issued based on information specific to the lamp unit to be replaced and information indicating a projector to be replaced. The projector includes a control unit that resets the cumulative lighting time.
According to the above configuration, since the reset code is first issued when the lamp unit is replaced with a new lamp unit, the cumulative lighting time management system for the projector that resets the cumulative lighting time when the lamp unit is replaced with a new lamp unit. Can be provided.

Further, the present invention capable of solving the above-mentioned problems is a cumulative control of the lamp in a projector control method for projecting light emitted from a lamp of a detachable lamp unit according to a video signal. A step of accepting a reset code for resetting the time, and the input reset code was first issued based on information specific to the lamp unit scheduled to be replaced and information indicating a projector scheduled to replace the lamp unit If it is, the step of resetting the cumulative lighting time is included.
According to the above configuration, since the reset code is first issued when the lamp unit is replaced with a new lamp unit, a projector control method for resetting the cumulative lighting time when the lamp is replaced with a new lamp unit is provided. be able to.

In addition, the projector control program of the present invention that can solve the above-described problems is applied to a computer included in a projector that modulates and projects light emitted from a lamp included in a detachable lamp unit according to a video signal. A step of receiving a reset code for resetting the cumulative lighting time of the lamp, and the input reset code is based on information specific to the lamp unit scheduled for replacement and information indicating a projector scheduled for replacement of the lamp unit. And a step of resetting the cumulative lighting time when it is issued for the first time.
According to the above configuration, since the reset code is issued first when the lamp unit is replaced with a new lamp unit, the projector provides a projector control program that resets the cumulative lighting time when the lamp is replaced with a new lamp unit. be able to.

It is the figure which showed schematic structure of the cumulative lighting time management system of this embodiment. It is a block diagram which shows the internal structure of the projector of this embodiment. It is a flowchart explaining the process performed when a user performs reset operation of accumulation lighting time. It is a figure which shows an example of a reset code input request screen. It is a flowchart for demonstrating the reset code issuing process by a reset code issuing apparatus. It is an example of the error screen for notifying that the input reset code is invalid. It is an example of an error screen for notifying that a reset code has already been used. It is a flowchart for demonstrating the process performed when it replaces | exchanges for a new lamp unit.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a projector, a projector cumulative lighting time management system, a projector control method, and a control program thereof according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the cumulative lighting time management system 100 according to the present embodiment can communicate with a projector 1 connected via a LAN 95 and a host computer 50 that controls the operation of the projector 1 via the LAN 95 and the Internet 90. And a reset code issuing device 80 connected thereto.

  The projector 1 modulates a video signal received from a video data supply device such as the host computer 50 to form an optical image, and enlarges and projects the optical image.

  The host computer 50 includes a CPU 51 that forms the center of arithmetic processing. The CPU 51 can access a ROM 53 and a RAM 55 written in the BIOS or the like via a system bus 69. A hard disk drive 59, a floppy (registered trademark) disk drive 61, and a CD-ROM drive 63 as external storage devices are connected to the system bus 69, and an OS (Operating System) stored in the hard disk drive 59 and An application or the like is transferred to the RAM 55, and the CPU 51 accesses the ROM 53 and the RAM 55 as appropriate to execute the software.

  An input device for operation of a keyboard 57a and a mouse 57b is connected to the communication I / O 57, and a display 65 for display is also connected via a video board (not shown). Further, it can communicate with the projector 1 connected to the LAN 95 via the communication interface 67. Further, communication with a reset code issuing device 80 connected to the Internet 90 is possible via the communication interface 67. As the host computer 50, a computer having a general configuration as a personal computer can be adopted.

  The reset code issuing device 80 includes a CPU 81, a RAM 83, a ROM 85, a key code storage unit 87, a serial number storage unit 88 and a communication interface 89. The CPU 81 reads a program from the ROM 85 and executes various arithmetic processes in the RAM 83. In the present embodiment, when the CPU 81 receives a reset code issuance request for resetting the cumulative lighting time from the host computer 50 via the communication interface 89, the CPU 81 generates a reset code. The generated reset code is transmitted to the host computer 50 via the communication interface 89.

  The reset code is a code associated with a key code unique to the lamp unit that can be attached to and detached from the projector 1 (lamp unit identification code) and a serial number unique to the projector 1 (identification information of the projector body). .

  The reset code issuing device 80 is a server managed by, for example, a projector manufacturer, and the serial number storage unit 88 stores serial numbers for all projectors shipped from the manufacturer to the factory. Here, the serial number of the projector 1 is also stored in the serial number storage unit 88.

  The CPU 81 determines whether or not a number that matches the received serial number is stored in the serial number storage unit 88. If the matching serial number is not stored in the serial number storage unit 88, the reset code is not issued because the received serial number is an invalid number. If a matching serial number is stored, a predetermined operation is performed on the basis of the received key code and serial number, encryption is performed, and a reset code is generated.

  Further, when the CPU 81 issues a reset code, the key code used for issuing the reset code is stored in the key code storage unit 87. Further, the CPU 81 determines whether or not the received key code matches the code stored in the key code storage unit 87, and does not generate a reset code even if the key code matches. This is because if the received key code matches the key code stored in the key code storage unit 87, the reset code has already been issued based on the key code.

Next, the internal configuration of the projector 1 will be described with reference to FIG.
As shown in FIG. 2, the projector 1 includes a lamp 11, liquid crystal light valves 12 R, G, and B that are light modulation means, a projection optical system 13, a liquid crystal light valve driving unit 14, a control unit 20, and a lighting unit. Time counter 21, cumulative lighting time storage unit 23, reset code storage unit 25, lamp replacement detection unit 27, video / audio processing unit 32, frame memory 33, video processing unit 34, and audio processing unit 35 , A speaker 36, an OSD (On Screen Display) processing unit 38, a lamp driving unit 40, an operation signal processing unit 43, an operation panel 44, an input terminal 45, and a communication interface 46.

  The lamp 11 is housed in a lamp housing and can be separated from the projector 1 as a single lamp unit 10. Since the lamp has a lifetime, when the lamp is consumed, the entire lamp unit 10 can be replaced with a new one.

  The projection optical system 13 has a projection lens 13a. The projector 1 projects an optical image corresponding to a video signal supplied from the input terminal 45, and a projection object such as a screen, a white wall, or a white board (hereinafter, “screen SC in the present embodiment”) via the projection lens 13a. ").

  The control unit 20 includes a lighting time counter 21, a cumulative lighting time storage unit 23, a reset code storage unit 25, a lamp replacement detection unit 27, a video signal processing unit 32, an OSD processing unit 38, a lamp driving unit 40, and an operation signal processing unit 43. And a communication interface 46. The control unit 20 includes a microprocessor, a nonvolatile storage unit, and a main storage unit that can be directly accessed by the microprocessor. The nonvolatile storage unit stores a control program for controlling various operations of the projector 1, OSD information for generating an OSD image such as display of a keystone distortion correction amount, and various setting values of the projector 1. Is remembered. For example, the serial number of the projector 1 is stored.

  The microprocessor executes a control program or the like stored in the non-volatile storage unit to control the operation of the projector 1 and calculates various data input from each unit connected to the control unit 20. The result is output to each part.

  The lighting time counter 21 counts the lighting time of the lamp 11 provided in the lamp unit 10 in accordance with an instruction from the control unit 20. The lighting time counter 21 outputs an update signal to the control unit 20 when the power of the projector 1 is turned off or every predetermined time.

  The cumulative lighting time storage unit 23 is a rewritable nonvolatile storage unit such as an EEPROM or a flash memory, and stores the cumulative lighting time of the lamp 11. When the control unit 20 receives the update signal from the lighting time counter 21, the control unit 20 adds the value counted by the lighting time counter 21 so far and writes it as a new cumulative lighting time in the cumulative lighting time storage unit 23.

  The reset code storage unit 25 is also a rewritable nonvolatile storage unit such as an EEPROM or a flash memory. The reset code issued by the reset code issuing device 80 and input to the projector 1 is stored. In addition to the reset code, a key code unique to the lamp unit corresponding to the reset code is stored. The control unit 20 stores the key code together with the input reset code in the reset code storage unit 25. The control unit 20 determines whether or not the next received reset code matches the reset code stored in the reset code storage unit 25. If the reset codes match, the accumulated lighting time stored in the cumulative lighting time storage unit 23 is not reset because the reset code has already been used.

  The lamp replacement detection unit 27 is composed of, for example, a push switch, and detects attachment / detachment of the lamp unit 10 when the push switch is pressed when the lamp unit 10 is mounted. The lamp replacement detection unit 27 is not limited to a push switch, and may be any unit that can detect attachment / detachment of the lamp unit 10.

  The video / audio processing unit 32 decodes the video signal received from the input terminal 45 and converts it into video data before compression encoding, converts these into RGB signals, for example, and sequentially outputs them to the video processing unit 34. Further, the audio signal input from the audio input terminal is similarly decoded, converted into audio data by D / A conversion, and sequentially output to the audio processing unit 35. A frame memory 33 is connected to the video / audio processing unit 32, and the video data is stored in the frame memory 33 for each frame and the video data stored in the frame memory 33 is read out.

  The video processing unit 34 performs γ correction processing, trapezoidal correction processing, resolution conversion processing, and the like on the RGB signal received from the video / audio processing unit 32, and outputs the result to the liquid crystal light valve driving unit 14.

  The liquid crystal light valve drive unit 14 drives the liquid crystal light valves 12R, G, and B according to the input RGB signals. Each liquid crystal light valve 12R, G, B includes a plurality of pixels in a matrix form. By adjusting the transmittance of each pixel by the liquid crystal light valve driving unit 14, R (red), G (green), B (blue) emitted from the lamp 11 and separated into each color light by the color light separation optical system. ) Are modulated by the corresponding liquid crystal light valves 12R, G, and B, and an optical image is emitted. The optical images emitted from the liquid crystal light valves 12R, 12G, and 12B are combined by a combining optical system such as a cross dichroic prism, and are enlarged and projected on the screen SC by the projection lens 13a of the projection optical system 13.

  The audio processing unit 35 outputs the audio data received from the video / audio processing unit 32 to the speaker 36. Note that the audio processing unit 35 has a volume amplifying unit, amplifies the volume, and outputs it to the speaker 36. As a result, the speaker 36 outputs an analog audio signal that is amplified and input.

  The OSD processing unit 38 receives OSD information from the control unit 20 such as a menu video or a video when a video input terminal is detected, and generates an OSD video. Further, the generated OSD video and the video data received from the video processing unit 34 are combined and transmitted to the liquid crystal light valve driving unit 14. For example, when the cumulative lighting time of the lamp 11 has reached the life warning time, video data for warning the user that the life time of the lamp 11 is approaching is generated according to an instruction from the control unit 20, and the liquid crystal is generated. It transmits to the light valve drive unit 14. In addition, if the input reset code is invalid, has been used, or does not match the projector serial number, video data is generated to notify the error, and the liquid crystal light valve drive unit 14 to send.

  The lamp driving unit 40 is a lighting unit that turns on or off the lamp 11 in accordance with an instruction from the control unit 20. For example, when the lamp 11 is a high-pressure discharge lamp, a lighting circuit that applies a starting voltage or an appropriate lamp It consists of a ballast that supplies current.

  The operation signal processing unit 43 receives an operation signal input from the operation panel 44 or the remote controller RC and outputs it to the control unit 20.

  The communication interface 46 is an interface for communicating with the host computer 50 via the LAN 95 to transmit / receive various data. Further, the communication interface 45 may communicate with the reset code issuing device 80 via the LAN 95 and the Internet 90.

  When a reset code is input via the communication interface 46 or the operation signal processing unit 43, the control unit 20 of the present embodiment switches the key code unique to the lamp unit to be replaced and the projector 1 that is scheduled to replace the lamp unit. If it is issued first based on the serial number shown, the cumulative lighting time stored in the cumulative lighting time storage unit 23 is reset. In addition, when a code that matches the input reset code is already stored in the reset code storage unit 25, the control unit 20 outputs error information to the OSD processing unit 38 without resetting the cumulative lighting time. Instruct them to do so. Further, the control unit 20 causes the OSD processing unit 38 to output error information without resetting the accumulated lighting time even when the decoded code obtained by decoding the reset code does not match the serial number of the projector 1. Instruct.

<Regarding the cumulative lighting time reset process>
Next, the accumulated lighting time reset process executed by the projector according to the present embodiment will be described in detail with reference to FIGS. First, with reference to FIG. 3 to FIG. 7, a process executed when the user performs a reset operation of the cumulative lighting time will be described.

  First, when resetting the cumulative lighting time, the user performs an input operation for displaying a setting menu screen using the operation panel 44 of the projector 1 or the remote controller RC. When receiving an input operation via the operation signal processing unit 43, the control unit 20 causes the OSD processing unit 38 to generate video data for the setting menu. The video data of the setting menu is enlarged and projected on the screen SC by the projection lens 13a via the liquid crystal light valve driving unit 14, the liquid crystal light valves R12, G, B, and the projection optical system 13.

  When the user gives a reset operation for the cumulative lighting time based on the projected setting menu screen, the control unit 20 accepts the reset operation (step S11), and generates the video data of the reset code input request screen in the OSD processing unit 38. Let A reset code input request screen is projected on the screen SC (step S13).

  As shown in FIG. 4, on the reset code input request screen, the message “The key code attached to the lamp unit and the serial number are used to enter the reset code from http: //www.*** Acquire and enter. "And the serial number" 099AA2107-01254-02 "of the projector 1 are included.

  Referring to the screen of FIG. 4, the user accesses the reset code issuing device 80 at the address “http: //www.***...” Using the host computer 50 here. From here, it demonstrates according to the flowchart of FIG. The user inputs the key code attached to the lamp unit to be replaced and the serial number of the projector 1 displayed on the reset code input request screen from the keyboard 57a and the mouse 57b.

  As shown in FIG. 5, when the CPU 81 of the reset code issuing device 80 receives the input of the key code and the serial number (step S31: Yes), the serial number identical to the received serial number is stored in the serial number storage unit 88. It is determined whether or not it has been. If the same serial number is not stored (step S32: No), error information is transmitted to the host computer 50 without generating a reset code and displayed (step S39). If the same serial number is stored (step S32: Yes), it is determined whether or not the received key code is an unused key code. That is, the CPU 81 determines whether or not the received key code matches the code stored in the key code storage unit 87. If the key codes match, it is a used key code (step S33: No), so that error information is transmitted to the host computer 50 without being generated and displayed (step S39).

  If the key codes do not match, it is an unused key code (step S33: Yes), and therefore an unused key code is stored in the key code storage unit 87 (step S35). The CPU 81 encrypts the reset code generated based on the key code and the serial number, and issues the encrypted reset code to the host computer 50. (Step S37). The encrypted reset code received from the reset code issuing device 80 is displayed on the display 65 of the host computer 50, and the user obtains the encrypted reset code by referring to the display 65.

  Next, returning to FIG. 3, the user inputs the encrypted reset code on the reset code input request screen of FIG. 4 using the operation panel 44 or the remote controller RC. An encrypted reset code may be input from the communication interface 46 via the LAN 95 from the host computer 50. When receiving the encrypted reset code (step S14: Yes), the control unit 20 decrypts the encrypted reset code (step S15). Then, it is determined whether or not the decrypted reset code is a valid reset code (step S17).

  If it is determined that the reset code is not valid (step S17: No), the OSD processing unit 38 is caused to generate video data of an error screen without resetting the cumulative lighting time. For example, as shown in FIG. 6, an error screen for notifying that the reset code is invalid is projected on the screen SC (step S29).

  On the other hand, if the control unit 20 determines that the reset code is valid (step S17: Yes), the control unit 20 determines whether the reset code is already used (step S19). That is, the control unit 20 determines whether or not the decrypted reset code matches the code stored in the reset code storage unit 25. If the reset codes match, the reset code is already used (step S19: Yes), and the OSD processing unit 38 is caused to generate video data of the error screen without resetting the cumulative lighting time. For example, as shown in FIG. 7, an error screen for notifying that the reset code has already been used is projected on the screen SC (step S29).

  On the other hand, if the reset codes do not match, the control unit 20 is an unused reset code (step S19: No), and therefore acquires a decrypted code, that is, a key code and a serial number, from the decrypted reset code. (Step S21). It is determined whether or not the serial number acquired in step S21 matches the serial number of the projector 1 included in the control unit 20 (step S23). If the serial numbers do not match (step S23: No), the OSD processing unit 38 generates video data of the error screen without resetting the cumulative lighting time, and the error screen is projected (step S29). This is to prevent resetting the cumulative lighting time of different projectors when the serial numbers do not match.

  On the other hand, when the serial numbers match (step S23: Yes), the control unit 20 resets the cumulative lighting time stored in the cumulative lighting time storage unit 23 (step S25), and resets the reset code together with the key code. The data is stored in the code storage unit 25 (step S27), and the process is terminated.

  Next, processing executed when the lamp unit is replaced with a new lamp unit will be described with reference to FIG.

  When the lamp replacement detection unit 27 detects replacement of the lamp unit (step S41: Yes), the control unit 20 is newly mounted with the key code of the lamp unit 10 before replacement stored in the reset code storage unit 25. It is determined whether the key codes of the lamp units are the same (step S42). The key code of the newly installed lamp unit may be input from the operation signal processing unit 43 or the communication interface 46, or when each lamp unit has a built-in memory for storing the key code, The control unit 20 may read from the memory of the lamp unit.

  If the control unit 20 determines that the key codes of the lamp units before and after replacement are the same (step S42: Yes), the newly installed lamp unit is the same lamp unit 10 as before the replacement, and therefore reset after step S43. The normal process is executed without executing the process. In this case, the cumulative lighting time can be continuously counted without being reset.

  If the control unit 20 determines that the key codes of the lamp units before and after replacement are not the same (step S42: No), the accumulated lighting time is reset. That is, the control unit 20 causes the OSD processing unit 38 to generate the video data of the reset code input request screen and causes the screen SC to project the reset code input request screen shown in FIG. 4 (step S43).

  The user inputs the key code attached to the newly installed lamp unit and the serial number of the projector 1 displayed on the reset code input request screen using the keyboard 57a and mouse 57b of the host computer 50. Thereafter, the reset code issuing device 80 executes the same processing as the flow of FIG. 5 described above, and issues a reset code.

  The user who has acquired the reset code issued by the reset code issuing device 80 inputs the encrypted reset code to the reset code input request screen of FIG. 4 using the operation panel 44 of the projector 1 or the remote controller RC. An encrypted reset code may be input from the communication interface 46 via the LAN 95 from the host computer 50. When the control unit 20 receives the encrypted reset code via the operation signal processing unit 43 (step S44: Yes), the encrypted reset code is decrypted (step S45). Then, it is determined whether or not the decrypted reset code is a valid reset code (step S47).

  If it is determined that the reset code is not valid (step S47: No), the OSD processing unit 38 is caused to generate video data of an error screen without resetting the cumulative lighting time. For example, as shown in FIG. 6, an error screen for notifying that the reset code is invalid is projected on the screen SC (step S59). Then, the control unit 20 instructs the lamp driving unit 40 to turn off the lamp 11, turns off the lamp 11, and executes a power-off process (step S61).

  On the other hand, when the control unit 20 determines that the reset code is valid (step S47: Yes), the control unit 20 determines whether the reset code is already used (step S49). That is, the control unit 20 determines whether or not the decrypted reset code matches the code stored in the reset code storage unit 25. If the reset codes match, the reset code is already used (step S49: Yes), and the OSD processing unit 38 is caused to generate video data of the error screen without resetting the cumulative lighting time. For example, as shown in FIG. 7, an error screen for notifying that the reset code has already been used is projected on the screen SC (step S59). Then, the control unit 20 instructs the lamp driving unit 40 to turn off the lamp 11, turns off the lamp 11, and executes a power-off process (step S61).

  On the other hand, if the reset codes do not match, the control unit 20 is an unused reset code (step S49: No), and therefore obtains a key code and a serial number that are decryption codes from the decrypted reset code ( Step S51). It is determined whether or not the serial number acquired in step S51 matches the serial number of the projector 1 included in the control unit 20 (step S53). If the serial numbers do not match (step S53: No), the OSD processing unit 38 generates video data of the error screen without resetting the cumulative lighting time, and the error screen is projected (step S59). This is to prevent resetting the cumulative lighting time of different projectors when the serial numbers do not match. Then, the control unit 20 instructs the lamp driving unit 40 to turn off the lamp 11, turns off the lamp 11, and executes a power-off process (step S61).

  On the other hand, when the serial numbers match (step S53: Yes), the control unit 20 resets the cumulative lighting time stored in the cumulative lighting time storage unit 23 (step S55), and the newly installed lamp unit is reset. The unique key code is stored in the reset code storage unit 25 together with the reset code (step S57), and the process ends.

Thus, according to this embodiment, only a user who has the key code of the lamp unit 10 and the serial number of the projector 1 can access the reset code issuing device 80 and acquire the reset code. The reset code is issued for each key code by the reset code issuing device 80.
Even if a user tries to use a used lamp unit that has been used once but has not yet reached the end of its life, the reset code for the used lamp unit is the same as when the lamp unit shown in Fig. 8 is replaced. In the process to be executed, it should have been issued and the reset code cannot be acquired again. Also, even if an attempt is made to use the reset code issued at the time of initial mounting, the projector-specific serial numbers do not match and cannot be used. In addition, even if the lamp unit is not actually replaced and the user erroneously attempts to reset the cumulative lighting time, the reset code for the lamp unit once installed is the lamp shown in FIG. The reset code cannot be acquired again because it should have been issued in the process executed when the unit is replaced.

  That is, the input reset code is a valid reset code (step S17: Yes, step S47: Yes), and is an unused reset code (step S19: No, step 47: No), and is input. When the serial number obtained based on the reset code matches the serial number of the projector 1 to which the projector 1 is mounted (step S23: Yes, step S53: Yes), the reset code is first replaced with a new lamp unit. You can see that it was issued. For this reason, it is possible to provide the projector 1 that resets the cumulative lighting time only when the lamp unit is replaced with a new lamp unit.

  Further, according to the embodiment, the reset code once input to the projector 1 is stored in the nonvolatile reset code storage unit 25. Therefore, even if the main body power is turned off, the reset code is stored in the reset code storage unit 25, so that the same reset code can be prevented from being used multiple times. Therefore, even if the reset code is properly acquired, it is possible to suppress the repeated use of the code and to prevent the cumulative lighting time reset process from being performed unnecessarily.

  Further, according to the above embodiment, even if the reset code obtained by the user is illegally input, the serial number of the projector 1 on which the lamp unit is mounted and the serial number obtained from the decrypted reset code must match. If this is the case, the cumulative lighting time cannot be reset. For this reason, it is possible to prevent the accumulated lighting time from being reset by unauthorized means.

  Further, according to the above embodiment, when the lamp unit is replaced as shown in FIG. 8, the reset code is invalid (step S47: No) or the reset code has been used (step S49: Yes). ) If the serial numbers do not match (step S53: No), an error is displayed, the lamp 11 is turned off, and the power OFF process is executed. For this reason, when the lamp 11 is replaced with a used lamp unit that has been used once but has not reached the end of its life, or is replaced with an illegally acquired lamp unit, the lamp 11 cannot be used, that is, the projection process cannot be executed. can do.

  Further, according to the above embodiment, when the key codes of the lamp units before and after replacement are the same as shown in FIG. 8 (step S42: Yes), normal processing is executed. When the key codes are the same, the same lamp unit is mounted again. In such a case, if the cumulative lighting time is reset, the accurate cumulative lighting time cannot be maintained, and warning information for notifying the lamp life cannot be output at the correct time. . According to the present embodiment, in such a case, the cumulative lighting time is continuously counted without resetting the cumulative lighting time, so that warning information can be output at the correct time.

  In the above-described embodiment, the key code of the lamp unit and the serial number of the projector 1 are input from the host computer 50 that is communicably connected to the projector 1 via the LAN 95, and the reset code is acquired from the reset code issuing device 80. did. However, the present invention is not limited to such a configuration, and by providing the projector 1 with means for directly communicating with the reset code issuing device 80, the projector 1 can directly access the reset code issuing device 80 to obtain the key code and serial number. The reset code may be acquired directly from the reset code issuing device 80. The reset code does not necessarily have to be acquired via a network such as the LAN 95 or the Internet 90. The reset code may be acquired using other communication means such as a portable terminal, a PDA (Personal Digital Assistant), and a telephone.

  In the above-described embodiment, the liquid crystal light valve projector that modulates and projects the light from the light source by the liquid crystal light valves 12R, 12G, and 12B that are light modulators is exemplified, but the present invention adopts other methods. It can also be applied to projectors. Specifically, a projection system using a DMD (Digital Micromirror Device), a so-called DLP (Digital Light Processing) (registered trademark) system. That is, in the DLP method, the light of the lamp that shines in white is condensed by the lens and applied to the DMD, and the light when each mirror of the DMD is tilted to the on state is enlarged by another lens and projected onto the screen. Therefore, the present invention can also be applied to such a projector. In the above-described embodiment, the projector 1 that projects using a discharge lamp as a light source is exemplified. However, the present invention can also be applied to a projector that projects using an LED light source or a laser light source as a light source.

1: projector, 11: lamp, 12R, G, B: liquid crystal light valve, 13: projection optical system, 14: liquid crystal light valve driving unit, 20: control unit, 21: lighting time counter, 23: cumulative lighting time storage unit 25: Reset code storage unit, 27: Lamp replacement detection unit, 32: Video / audio processing unit, 33: Frame memory, 34: Video processing unit, 40: Lamp drive unit, 43: Operation signal processing unit, 44: Operation panel 45: input terminal 46: communication interface 50: host computer 80: reset code issuing device RC: remote control SC: screen

Claims (7)

In a projector that modulates and projects light emitted from a lamp of a detachable lamp unit according to a video signal,
A lighting time storage unit for storing the cumulative lighting time of the lamp;
A control unit for receiving a reset code for resetting the cumulative lighting time,
The control unit, when the input reset code is first issued based on information specific to a lamp unit scheduled to be replaced and information indicating a projector scheduled to replace the lamp unit. A projector characterized by resetting the lighting time. The projector according to claim 1,
The control unit resets the cumulative lighting time when the input reset code is a code associated with a unique identification code given to each lamp unit and identification information unique to the projector. Projector. The projector according to claim 1 or 2,
A reset code storage unit for storing the reset code input at the time of replacement of the previous lamp unit;
The control unit outputs the error information without resetting the cumulative lighting time when a code that matches the newly input reset code is already stored in the reset code storage unit. Projector. The projector according to any one of claims 1 to 3,
The reset code is an encrypted code,
The control unit outputs the error information without resetting the cumulative lighting time when the decoded code obtained by decoding the reset code does not match the projector-specific identification information. projector. A reset code issuing device for issuing a reset code for resetting the cumulative lighting time of the lamp;
A lighting time storage unit that stores the cumulative lighting time of the lamp, the reset code is received, and the input reset code is information specific to the lamp unit that is scheduled to be replaced and information that indicates a projector that is scheduled to be replaced. A projector that includes a control unit that resets the cumulative lighting time when it is issued for the first time based on the above. In a projector control method for projecting light emitted from a lamp included in a detachable lamp unit according to a video signal,
Receiving a reset code for resetting the cumulative lighting time of the lamp;
When the input reset code is first issued based on information specific to a lamp unit scheduled to be replaced and information indicating a projector scheduled to be replaced, the accumulated lighting time is reset. And a projector control method. To a computer that has a projector that modulates and projects the light emitted from the lamp of the detachable lamp unit according to the video signal,
Receiving a reset code for resetting the cumulative lighting time of the lamp;
When the input reset code is first issued based on information specific to a lamp unit scheduled to be replaced and information indicating a projector scheduled to be replaced, the accumulated lighting time is reset. And a projector control program.

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