WO2013011675A1 - Projector and method for controlling projector - Google Patents

Projector and method for controlling projector Download PDF

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Publication number
WO2013011675A1
WO2013011675A1 PCT/JP2012/004525 JP2012004525W WO2013011675A1 WO 2013011675 A1 WO2013011675 A1 WO 2013011675A1 JP 2012004525 W JP2012004525 W JP 2012004525W WO 2013011675 A1 WO2013011675 A1 WO 2013011675A1
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WO
WIPO (PCT)
Prior art keywords
lamp
projector
light
period
unit
Prior art date
Application number
PCT/JP2012/004525
Other languages
English (en)
French (fr)
Inventor
Takashi Ozawa
Original Assignee
Seiko Epson Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corporation filed Critical Seiko Epson Corporation
Publication of WO2013011675A1 publication Critical patent/WO2013011675A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2086—Security or safety means in lamp houses

Definitions

  • the present invention relates to a projector and a method for controlling the projector.
  • PTL 1 and PTL 2 describe methods for saving the cumulative light-on period of the light source lamp in a memory and displaying a warning that prompts a user to exchange the light source lamp if the saved cumulative light-on period reaches a preset value.
  • An advantage of some aspects of the invention is to solve at least a part of the problem described above, and the invention can be implemented in the following forms or application examples.
  • This application example is directed to a projector including: an image projection unit that modulates light emitted from a lamp in accordance with image information and projects the modulated light; a light-on period measuring unit that measures a light-on period of the lamp; a mode setting unit that sets a normal mode in which the projector can be used normally or a limited use mode in which the projector is used under a limited condition; and a control unit that controls the operation of the projector.
  • the control unit instructs the image projection unit to project a first warning message that prompts a user to exchange the lamp and instructs the mode setting unit to set the limited use mode.
  • the projector when the light-on period of the lamp in the projector exceeds a predetermined lamp life warning period, the projector is used under a limited condition. In this way, the user is prompted to exchange the lamp but can use the projector under a limited condition until the lamp is exchanged.
  • Application Example 2 This application example is directed to the projector according to the application example described above, wherein if the mode setting unit has set the limited use mode and the projector has been used for a predetermined period, the control unit instructs the image projection unit to project a second warning message and powers off the projector.
  • the period during which the projector can be used continuously is limited to a predetermined period. Since the limited use mode only allows the user to project an image for a minimum required period, it is possible after the lamp life warning period is reached not only to prompt the user to quickly exchange the lamp but also to prevent the lamp from being burned out when the projector is in operation.
  • the intensity of the light from the lamp is set at a low value, whereby the user is prompted to quickly exchange the lamp and the projector can be used with the intensity or the burden of the lamp kept low after the lamp life warning period is reached.
  • the limited use mode is switched to the normal mode, whereby the user can use the projector normally without having to particularly change the settings.
  • Fig. 1 is a block diagram showing a circuit configuration of a projector.
  • Fig. 2 is a flowchart showing the operation of the projector when it is powered on.
  • Fig. 3 is a flowchart showing the operation of the projector after an operation period of the projector becomes equal to a limited use period.
  • Fig. 4 is a flowchart showing the operation of the projector after a lamp cumulative light-on period becomes equal to a lamp life warning period.
  • Fig. 5-A showing an example of a power-off notification message M2 displayed when the operation period of the projector becomes equal to the limited use period [T1].
  • Fig. 5-B showing an example of a warning message M1 displayed when the lamp in operation has operated for a lamp life warning period [T2].
  • Fig. 1 is a block diagram showing a circuit configuration of a projector 1 according to the present embodiment.
  • the projector 1 includes an image projection unit 10, a control unit 20, a storage unit 21, a light source control unit 22, an input operation unit 23, an image signal input unit 5, an image signal processing unit 3, an OSD processing unit 4, a power supply terminal 6, a power supply 7, and a lamp exchange detection unit 30, which are accommodated in an enclosure (not shown), as shown in Fig. 1.
  • the image projection unit 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulators, a projection lens 13 as a projection system, and a liquid crystal driver 14.
  • the liquid crystal light valves 12R, 12G, and 12B modulate light having exited from the light source 11 in accordance with image information, and the projection lens 13 projects the modulated light on a screen SC or any other suitable surface to display an image.
  • the light source 11 includes a discharge light source lamp 11a, such as an ultrahigh-pressure mercury lamp and a metal-halide lamp, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B.
  • the light source lamp 11a corresponds to a lamp.
  • the light having exited from the light source 11 is converted by an optical integration system (not shown) into light having a substantially uniform intensity distribution and separated by a color separation system (not shown) into red (R), green (G), and blue (B) color light components, which correspond to the three primary colors of light and impinge on the liquid crystal light valves 12R, 12G, and 12B, respectively.
  • the light source 11 is configured as an exchangeable unit.
  • Each of the liquid crystal light valves 12R, 12G, and 12B is formed, for example, of a liquid crystal panel having a liquid crystal material sealed between a pair of transparent substrates.
  • a plurality of pixels (not shown) arranged in a matrix are formed in each of the liquid crystal light valves 12R, 12G, and 12B, and a drive voltage is applicable to the liquid crystal material on a pixel basis.
  • the liquid crystal driver 14 applies a drive voltage according to inputted image information to each of the pixels, the optical transmittance of the pixel is set in accordance with the image information.
  • the light having exited from the light source 11 is modulated when passing through the liquid crystal light valves 12R, 12G, and 12B, and image light according to the image information is formed on a color light basis.
  • the thus formed color image light fluxes are combined by a light combining system (not shown) on a pixel basis into color image light, which is then enlarged and projected through the projection lens 13 on the screen SC or any other suitable surface.
  • the image projection unit 10 has been described with reference to a transmissive liquid crystal projection system using the light source 11 and the three liquid crystal light valves 12R, 12G, and 12B as light modulators.
  • a light modulator based on any other suitable display method for example, using a reflective liquid crystal material or a micromirror device (light switch display method) may be used.
  • the control unit 20 includes a CPU (central processing unit) (not shown) and a RAM (random access memory) (not shown) used to temporarily store a variety of data and other pieces of information and operates in accordance with a control program (not shown) stored in the storage unit 21 to oversee and control the operation of the projector 1. That is, the control unit 20, along with the storage unit 21, functions as a computer.
  • a CPU central processing unit
  • RAM random access memory
  • the control unit 20 further includes a mode setting unit 201 that sets (or stores) a normal mode in which the projector 1 can be used normally and a limited use mode in which the projector 1 is used under a limited condition.
  • the control unit 20 further includes a timer 20a that corresponds to a light-on period measuring unit and measures a light-on period of the light source lamp 11a. The measured light-on period is saved as a lamp light-on period 21a in the storage unit 21.
  • the control unit 20 uses the timer 20a to start measuring elapsed time, and the measured light-on period is added to the lamp light-on period 21a saved in the storage unit 21.
  • the timer 20a is also used to measure a limited use period when the projector 1 operates in the limited use mode.
  • the storage unit 21 is formed of a flash memory, an FeRAM (ferroelectric RAM), or any other suitable rewritable nonvolatile memory.
  • the storage unit 21 stores, for example, a control program for controlling the operation of the projector 1 and a variety of setting data for specifying operation conditions and other parameters of the projector 1.
  • the storage unit 21 saves the lamp light-on period 21a, which is a cumulative light-on period of the light source lamp 11a.
  • the input operation unit 23 includes, although not shown in Fig. 1, a plurality of operation keys that a user uses to issue a variety of instructions to the projector 1.
  • the operation keys provided on the input operation unit 23 include a power supply key for alternately switching the state of the power supply between on and off, an input switch key for selecting one of a plurality of image input terminals connected to the image signal input unit 5, a menu key for displaying a superimposed setting menu for performing a variety of kinds of setting operation, a cursor key that the user uses to select one of setting items from the menu, a return key, an escape key, and a help key.
  • the input operation unit 23 When the user operates any of the variety of operation keys on the input operation unit 23, the input operation unit 23 outputs an operation signal according to the operation performed by the user to the control unit 20.
  • the input operation unit 23 may alternatively be formed of a remote controller signal receiver (not shown) and a remotely operated remote controller (not shown).
  • the remote controller sends, for example, an infrared operation signal according to the operation performed by the user, and the remote controller signal receiver receives the operation signal and transmits it as control information to the control unit 20.
  • the lamp exchange detection unit 30 is formed, for example, of a mechanical or electrical switch, detects that the light source 11 has been removed from the projector 1, and notifies the control unit 20 of the removal.
  • the state of the lamp exchange detection unit 30 is set to a lamp exchange monitoring state in response to an instruction from the control unit 20 and changes to a lamp exchange detected state when the light source 11 is removed.
  • the control unit 20 detects that the light source 11 has been removed or attached again by checking whether the state of the lamp exchange detection unit 30 is the lamp exchange detected state.
  • the image signal input unit 5 includes a plurality of image input terminals as described above, to which image information is inputted from a video reproducing apparatus, a personal computer, and other external image output apparatus via cables (not shown).
  • the image signal processing unit 3 converts the image information inputted from the image signal input unit 5 into image information representing the grayscale of each of the pixels in the liquid crystal light valves 12R, 12G, and 12B.
  • the converted image information is formed of individual pieces of RGB color image information, specifically, a plurality of pixel values corresponding to all the pixels in the liquid crystal light valves 12R, 12G, and 12B.
  • the pixel value used herein represents optical transmittance of the corresponding pixel and specifies the intensity (grayscale) of light passing through and exiting out of the pixel.
  • the OSD processing unit 4 superimposes a menu image , a message image, or any other OSD (on-screen display) image over a projected image and displays the superimposed image based on an instruction from the control unit 20.
  • the OSD processing unit 4 includes an OSD memory (not shown), which stores OSD image information representing figures, fonts, and other objects for forming OSD images.
  • the OSD processing unit 4 When the control unit 20 instructs the OSD processing unit 4 to superimpose an OSD image, the OSD processing unit 4 reads necessary OSD image information from the OSD memory and combines the OSD image information with image information inputted from the image signal processing unit 3 in such a way that the OSD image is superimposed in a predetermined position over a projected image. The image information with which the OSD image information has been combined is outputted to the liquid crystal driver 14. When the control unit 20 issues no instruction to superimpose an OSD image, the OSD processing unit 4 outputs image information inputted from the image signal processing unit 3 as it is to the liquid crystal driver 14.
  • the liquid crystal driver 14 drives the liquid crystal light valves 12R, 12G, and 12B in accordance with the image information inputted from the OSD processing unit 4, and the liquid crystal light valves 12R, 12G, and 12B form images according to the image information, which are projected through the projection lens 13.
  • the power supply 7 is externally supplied with electric power, such as AC 100 V, via the power supply terminal 6.
  • the power supply 7 converts AC power, such as commercial power, into DC power of a predetermined voltage and supplies the resultant power to the components of the projector 1.
  • the power supply 7 can switch the operation of the projector 1 based on an instruction from the control unit 20 between a state in which electric power necessary to project an image (operating power) is supplied to the components of the projector 1 (power-on state) and a state in which the supply of the operating power is terminated and the projector 1 waits until it is powered on (standby state).
  • the light source control unit 22 controls supply and termination of electric power to the light source 11 based on an instruction from the control unit 20 to switch the operation of the light source lamp 11a between light-on and light-off states.
  • the light source control unit 22 can also change the intensity of the light from the light source lamp 11a in operation (for example, set the intensity at a high value that allows the user to feel brighter than in the normal mode or a low value that allows the user to feel darker than in the normal mode).
  • the projector 1 since the projector 1 according to the present embodiment is configured as described above, when a power supply cable (not shown) is connected to the power supply terminal 6 and electric power is supplied to the power supply 7, the power supply 7 supplies electric power (standby power) at least to the control unit 20, the storage unit 21, and the input operation unit 23, and the control unit 20 that receives the electric power starts operating in accordance with the control program.
  • a power supply cable not shown
  • the power supply 7 supplies electric power (standby power) at least to the control unit 20, the storage unit 21, and the input operation unit 23, and the control unit 20 that receives the electric power starts operating in accordance with the control program.
  • the projector 1 Immediately after the electric power is supplied, the projector 1 operates in the standby state (also called "power-off state"), and the light source lamp 11a is kept turned off.
  • the control unit 20 instructs the power supply 7 to start supplying the operating power to the components or/and the units of the projector 1 so that the projector 1 transitions to the power-on state.
  • FIG. 2 is a flowchart showing the operation of the projector 1 when it is powered on.
  • step S101 In the standby state of the projector 1, when the input operation unit 23 detects power-on (ON) operation (step S101), the control unit 20 checks whether or not the lamp exchange detection unit 30 has detected that the light source 11 (light source lamp 11a) had been exchanged (step S102), as shown in Fig. 2. When the lamp exchange detection unit 30 has detected that the light source 11 had been exchanged (step S102: Y), the control unit 20 proceeds to step S103. When the lamp exchange detection unit 30 has detected that the light source 11 had not been exchanged (step S102: N), the control unit 20 proceeds to step S105.
  • step S103 the control unit 20 resets the lamp light-on period 21a, instructs the lamp exchange detection unit 30 to operate in the lamp exchange monitoring state, and proceeds to step S104.
  • step S104 the control unit 20 instructs the mode setting unit 201 to set the normal mode and proceeds to step S105.
  • step S105 the control unit 20 instructs the light source control unit 22 to turn on the light source lamp 11a so that the projector 1 transitions to the power-on state.
  • the control unit 20 then proceeds to step S106.
  • step S106 the control unit 20 checks whether or not the mode setting unit 201 has set the limited use mode. If the mode setting unit 201 has set the limited use mode (step S106: Y), the control unit 20 proceeds to step S107. If the mode setting unit 201 has not set the limited use mode, that is, in case that the normal mode has been set (step S106: N), the control unit 20 proceeds to step S109.
  • step S107 the control unit 20 instructs the light source control unit 22 to set the intensity of the light from the light source lamp 11a at a low value and proceeds to step S108.
  • step S108 the control unit 20 instructs the image projection unit 10 to project a lamp exchange warning message M1 and proceeds to step S110.
  • Fig. 5-B shows an example of the lamp exchange warning message M1.
  • step S109 the control unit 20 instructs the light source control unit 22 to set the intensity of the light from the light source lamp 11a at a high value and proceeds to step S110.
  • step S110 the control unit 20 instructs the timer 20a to start measuring elapsed time and proceeds to step S111.
  • step S111 the control unit 20 instructs the image projection unit 10 to start projecting image data inputted from the image signal input unit 5, and the operation procedure is terminated.
  • FIG. 3 is a flowchart showing the operation of the projector 1 after the elapsed time measured by the timer 20a becomes equal to a limited use period T1 (30 minutes, for example), which is a predetermined period, in the limited use mode.
  • step S201 When the elapsed time measured by the timer 20a becomes equal to the limited use period T1 when the projector 1 is in operation (step S201), the control unit 20 instructs the image projection unit 10 to project a power-off notification message M2 for a predetermined period (step S202) and proceeds to step S203, as shown in Fig. 3.
  • Fig. 5-A shows an example of the power-off notification message M2.
  • step S203 the control unit 20 instructs the light source control unit 22 to turn off the light source lamp 11a, powers off the projector 1, and proceeds to step S204.
  • step S204 the control unit 20 makes the projector 1 transition to the standby state and terminates the operation procedure.
  • FIG. 4 is a flowchart showing the operation of the projector 1 after the lamp light-on period 21a becomes equal to a lamp life warning period during the operation of the projector 1.
  • control unit 20 When the control unit 20 has detected that the lamp light-on period 21a becomes equal to the lamp life warning period when the projector 1 is projecting an image (step S301), the control unit 20 instructs the mode setting unit 201 to set the limited use mode (step S302) and proceeds to step S303, as shown in Fig. 4.
  • step S303 the control unit 20 instructs the image projection unit 10 to project the lamp exchange warning message M1, which notifies the user that the lamp light-on period 21a becomes equal to the lamp life warning period, and the control unit 20 proceeds to step S304.
  • Fig. 5-B shows an example of the lamp exchange warning message M1.
  • step S304 the operation procedure is terminated.
  • the projector 1 of the present embodiment when the lamp light-on period 21a exceeds a predetermined lamp life warning period T2 (e.g. 4000hours), the projector 1 is set to operate in the limited use mode, in which the projector 1 is used under a limited condition. In this way, the user is prompted to exchange the light source lamp 11a but can use the projector 1 under a limited condition until the light source lamp 11a is exchanged.
  • a predetermined lamp life warning period T2 e.g. 4000hours
  • the period for which the projector 1 can be continuously used is limited.
  • the limited use mode can thus prevent the user from keeping using the projector 1 for a long period after the lamp light-on period 21a becomes equal to the lamp life warning period. Further, since the projector 1 can be used only for a minimum required period (T1), the user is prompted to quickly exchange the light source lamp 11a.
  • the intensity of the light from the light source lamp 11a is set at a low value, whereby the projector 1 can be used with the intensity or the burden of the light source lamp 11a kept low after the lamp light-on period 21a becomes equal to the lamp life warning period.
  • the mode setting unit 201 switches the limited use mode to the normal mode, whereby the user can use the projector 1 normally without having to particularly change the settings.
  • the transmissive liquid crystal light valve may be replaced with a reflective liquid crystal light valve or a digital mirror device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)
PCT/JP2012/004525 2011-07-20 2012-07-12 Projector and method for controlling projector WO2013011675A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011158733A JP5782888B2 (ja) 2011-07-20 2011-07-20 プロジェクター
JP2011-158733 2011-07-20

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WO2013011675A1 true WO2013011675A1 (en) 2013-01-24

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6440477B2 (ja) 2014-12-09 2018-12-19 キヤノン株式会社 光源制御装置および画像投射装置
JP2017146433A (ja) * 2016-02-17 2017-08-24 株式会社リコー 画像投射装置
JP6707953B2 (ja) * 2016-03-31 2020-06-10 セイコーエプソン株式会社 プロジェクター、及び、プロジェクターの制御方法
JP2018185494A (ja) * 2017-04-27 2018-11-22 大日本印刷株式会社 表示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04250437A (ja) 1991-01-28 1992-09-07 Matsushita Electric Ind Co Ltd 投射型画像表示装置
EP0978756A1 (en) * 1998-02-26 2000-02-09 Seiko Epson Corporation Projection display apparatus
US20010005172A1 (en) * 1996-04-10 2001-06-28 Seiko Epson Light-source lamp unit, light-source device and projection-type display apparatus
JP2002287243A (ja) 2001-03-23 2002-10-03 Seiko Epson Corp ランプ寿命表示
US20040155597A1 (en) * 2003-02-07 2004-08-12 Belliveau Richard S. Method of lamp replacement warning for image projection lighting devices

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Publication number Priority date Publication date Assignee Title
JP3951051B2 (ja) * 1996-04-10 2007-08-01 セイコーエプソン株式会社 投写型表示装置
JP2000194070A (ja) * 1998-12-28 2000-07-14 Fujitsu Ltd 投写型表示装置
JP2005181606A (ja) * 2003-12-18 2005-07-07 Seiko Epson Corp 個人認証機能を備える投写表示システム
JP2007171302A (ja) * 2005-12-19 2007-07-05 Sharp Corp 光源装置、光源ユニット及び投影型画像表示装置
JP4997929B2 (ja) * 2006-11-14 2012-08-15 セイコーエプソン株式会社 表示装置
JP4952333B2 (ja) * 2007-03-30 2012-06-13 株式会社ニコン プロジェクタ付きカメラ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04250437A (ja) 1991-01-28 1992-09-07 Matsushita Electric Ind Co Ltd 投射型画像表示装置
US20010005172A1 (en) * 1996-04-10 2001-06-28 Seiko Epson Light-source lamp unit, light-source device and projection-type display apparatus
EP0978756A1 (en) * 1998-02-26 2000-02-09 Seiko Epson Corporation Projection display apparatus
JP2002287243A (ja) 2001-03-23 2002-10-03 Seiko Epson Corp ランプ寿命表示
US20040155597A1 (en) * 2003-02-07 2004-08-12 Belliveau Richard S. Method of lamp replacement warning for image projection lighting devices

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JP2013025020A (ja) 2013-02-04
JP5782888B2 (ja) 2015-09-24

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