WO2010109577A1 - Dispositif d'affichage par projection - Google Patents

Dispositif d'affichage par projection Download PDF

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Publication number
WO2010109577A1
WO2010109577A1 PCT/JP2009/055650 JP2009055650W WO2010109577A1 WO 2010109577 A1 WO2010109577 A1 WO 2010109577A1 JP 2009055650 W JP2009055650 W JP 2009055650W WO 2010109577 A1 WO2010109577 A1 WO 2010109577A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
display device
mounting base
projection display
strain
Prior art date
Application number
PCT/JP2009/055650
Other languages
English (en)
Japanese (ja)
Inventor
恭太郎 奥津
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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 Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2009/055650 priority Critical patent/WO2010109577A1/fr
Priority to JP2011505689A priority patent/JP5126413B2/ja
Publication of WO2010109577A1 publication Critical patent/WO2010109577A1/fr

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    • 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
    • G03B21/145—Housing details, e.g. position adjustments thereof

Definitions

  • the present invention relates to a projection display device that can be fixed to a mounting base.
  • a projector as a projection display device may be placed on a desk or a floor during use, and may be suspended from, for example, a ceiling (see Patent Documents 1-3).
  • a ceiling mount is used as an instrument for suspending the projector.
  • the ceiling hanger has a support part and a mounting base connected to the support part.
  • the support portion is fixed to the ceiling, and the projector is fixed to the mounting base. In this way, the projector is suspended from the ceiling.
  • FIG. 1 is a perspective view showing an example of a projector attached to an attachment base.
  • the projector 100 is fixed to the mounting base 110 while being suspended from the mounting base 110.
  • a support portion (not shown) is connected to the mounting base, and the support portion is fixed to the ceiling, for example.
  • the projector 100 and the mounting base 110 have screw holes and are fixed to each other by screws 122.
  • the size, number, and position of the screw holes formed in the projector are different for each product, there is a problem that only a mounting base suitable for the product can be used. Therefore, the size, number, and position of screw holes formed in the housing and the mounting base are defined by standards. In this way, various types of projectors can be fixed to the same mounting base.
  • the shape of the bottom surface of the housing and the shape of the mounting base do not match even if the size, number, and position of the screw holes are determined. Sometimes. In addition, it is difficult to manufacture a mounting base that fits a housing having various shapes.
  • FIG. 2 shows a state in which a projection type display device having irregularities formed on the bottom surface of the housing is fixed to a plate-like mounting base.
  • the convex portion 106 on the bottom surface may come into contact with the mounting base 110.
  • a gap is generated between the screw hole 124 formed in the housing 102 and the mounting base 110.
  • the mounting base 110 has higher strength than the housing 102, so that the housing 102 is distorted.
  • the housing Even if the shape of the housing matches the shape of the mounting base, if the strength of screw tightening varies between the screws that secure the mounting base and the housing, the housing will be distorted and the housing will be distorted. The body may deteriorate.
  • a precision optical component such as a light separation component is housed inside the housing of the projection display device.
  • the inventor of the present application has found that a further problem that a band-like shadow occurs in the projected image as a result of the distortion of the optical base affecting the optical component.
  • Japanese Patent Application Publication No. 2006-34879 Japanese Patent Application Publication No. 2007-178651 Japanese Patent Application Publication No. 2007-285355 Japanese Patent Application Publication No. 2005-37474
  • An object of the present invention is to provide a projection display device that solves any of the above-described problems.
  • the first projection display device of the present invention has a casing that can be fixed to the mounting base and a strain sensor that detects strain.
  • FIG. 1 is a perspective view of a projector according to an embodiment of the invention.
  • FIG. 4 is a perspective view of the projector shown in FIG. 3 fixed to a mounting base. It is a perspective view of the optical base provided in the housing
  • FIG. 2 is a schematic plan view of a projector according to an embodiment fixed to a mounting base. It is a schematic diagram of the foot
  • the present invention will be described in detail by taking a projector as an example.
  • the present invention can be applied to all projection display devices having a housing that can be fixed to the mounting base.
  • FIG. 3 is a perspective view of the projector according to the first embodiment.
  • the projector 10 includes a housing 12 that can be fixed to a mounting base, and an optical base on which optical components are mounted.
  • the optical base is provided inside the housing 12. Examples of the optical component mounted on the optical base include a photosynthetic component and a light separating component.
  • FIG. 4 is a perspective view of the projector fixed to the mounting base of the ceiling mount.
  • the attachment base 20 may be a plate formed integrally with a support portion (not shown) fixed to the ceiling, for example.
  • the projector 10 can be fixed to the lower surface of the mounting base 20.
  • the housing 12 is strongly fixed to the mounting base 20 by the fixture 22. Thereby, the projector 10 is prevented from dropping from the mounting base 20.
  • the mounting base 20 does not necessarily need to be installed horizontally, and may be angled with respect to a horizontal plane.
  • a screw can be used as the fixture 22, for example.
  • a screw hole 24 is formed in the projector.
  • a foot portion 26 is formed on the bottom surface 14 of the housing to support the housing when the projector is installed, and a screw hole 24 is formed in the bottom surface 28 of the foot portion (see FIG. 3).
  • the bottom surface 14 of the housing refers to one surface of the housing 12 that faces the mounting base 20 when the housing 12 is mounted to the mounting base 20. In the figure, four feet 26 are provided, but any number of feet may be used.
  • FIG. 5 is a schematic perspective view of the optical base provided inside the projector housing.
  • the optical base 30 is provided with a strain sensor that detects distortion of the optical base.
  • a strain gauge sensor 34 is used as a strain sensor, which detects a strain at a location where the strain sensor is attached as a change in electrical resistance.
  • the strain sensor is not limited to the strain gauge sensor as long as the strain of the optical base 30 can be detected.
  • the strain gauge sensor 34 is attached to the optical base 30. Specifically, the strain gauge sensor 34 is attached to the surface 32 of the optical base (hereinafter simply referred to as “the bottom surface of the optical base”) located toward the bottom surface 14 of the housing.
  • the strain gauge sensor 34 Since the bottom surface 32 of the optical base is located in the vicinity of the bottom surface 14 of the housing, it is easily affected by distortion of the bottom surface 14 of the housing. Therefore, by attaching the strain gauge sensor 34 to the bottom surface 32 of the optical base, the strain detection accuracy of the optical base 30 is improved.
  • the strain gauge sensor 34 may be attached to the bottom surface 14 of the housing. Since the distortion of the optical base 30 is caused by the distortion of the casing 12, the distortion of the optical base 30 can be indirectly detected by detecting the distortion of the casing 12.
  • FIG. 6 is a block diagram showing a configuration for displaying a detection result by the strain gauge sensor.
  • FIG. 6 shows only the configuration related to the display of the detection result.
  • the arrow in the figure indicates the direction in which the output signal from the strain gauge sensor 34 is transmitted.
  • the projector 10 includes an A / D converter 40, a CPU 42 as a control unit, a light emitting diode (LED) 44 as a display unit, an on-screen display (OSD) control unit 46, Have.
  • a / D converter 40 a CPU 42 as a control unit
  • a light emitting diode (LED) 44 as a display unit
  • an on-screen display (OSD) control unit 46 Have.
  • the strain gauge sensor 34 When the optical base 30 is distorted, the strain gauge sensor 34 outputs an electrical signal (analog signal). The analog signal from the strain gauge sensor 34 is converted into a digital signal by the A / D converter 40.
  • the A / D converter 40 transmits a high level signal when it receives an analog signal that is equal to or larger than a predetermined magnitude, and transmits a low level signal when it receives a smaller analog signal. Thus, the A / D converter 40 binarizes the distortion signal.
  • the signal digitized by the A / D converter 40 is sent to the CPU 42 as a control unit.
  • the CPU 42 sends a signal to the LED 44 or the OSD control unit 46 in accordance with the received signal.
  • the OSD control unit controls the OSD displayed on the screen.
  • the CPU 42 when the CPU 42 receives a high level signal, the CPU 42 displays a warning on a display unit such as the LED 44 or the OSD.
  • warning can be performed by blinking the LED 44.
  • a warning message may be displayed on the OSD displayed on the screen.
  • the warning may be issued by stopping the projection of the image from the projector 10.
  • the projector 10 can warn the user through these operations. Further, the warning is not limited to a visual one but may be a sound.
  • the strain sensor can cause the user to detect the occurrence of strain, so that the user can take measures such as loosening the fixture 22 that is strongly fixed to the housing 12. Thereby, the burden concerning the housing
  • the A / D converter 40 binarizes the distortion signal, but the A / D converter 40 may convert the distortion signal into a multistage digital signal. Thereby, a stepwise warning can be performed according to the magnitude of distortion of the optical base 30.
  • FIG. 7 is a schematic plan view of the projector device fixed to the mounting base
  • FIG. 8 is a schematic view of the feet formed on the housing.
  • a screw hole 24 is formed in the bottom surface 28 of the foot provided on the bottom surface 14 of the housing (see also FIG. 3). As described above, the housing 12 is fixed to the mounting base 20 via the foot portion 26.
  • the foot part 26 of the housing 12 supports the projector 10, it generally has high strength. Therefore, the distortion of the housing 12 can be reduced by fixing the housing 12 and the mounting base 20 via the foot portion 26 rather than directly fixing the housing 12 and the mounting base 20. In order to fix the housing 12 to the mounting base 20 via the foot portions 26, it is preferable that at least three foot portions 26 are formed.
  • the convex portion 50 does not contact the mounting base 20 even if the convex portion 50 is formed on the bottom surface 14 of the housing. Therefore, since there is no gap between the mounting base 20 and the bottom surface 28 of the foot, the distortion of the housing 12 is reduced as compared with the case shown in FIG.
  • the foot part 26 is configured to be extendable, and it is more preferable that the foot part 26 is configured to be able to bend back and forth.
  • a direction F in which the projector 10 projects an image is defined as “front”, and a direction B on the opposite side to the front is defined as “rear”.
  • the foot part 26 has an upper part 60, a lower part 62, and a hinge 64.
  • the upper portion 60 and the lower portion 62 are connected by a hinge 64.
  • the hinge 64 extends substantially parallel to the bottom surface 28 of the foot, and the foot 26 can be bent forward and backward with the hinge 64 as a center.
  • the hinge 64 is preferably bendable in several stages.
  • the tilt adjustment structure described in Patent Document 4 may be adopted. That is, the foot part 26 is connected to a tilt adjusting part 66 provided in the housing 12, and the tilt adjusting part 66 is movable in the height direction H of the projector. Thereby, the length of the foot
  • the direction in which the image is projected can be controlled by configuring the foot to be bendable and / or extendable.
  • an elastic member 70 for closing the screw hole 24 is detachably attached to the bottom surface 28 of the foot. Rubber can be used as the elastic member 70.
  • the elastic member 70 When the projector 10 is attached to the attachment base 20, the elastic member 70 is removed from the foot portion 26 (see FIG. 8). On the other hand, when the projector is placed on a desk, for example, the elastic member 70 is preferably attached to the foot portion 26. Thereby, the vibration of the projector is prevented.
  • the projector 10 includes a light source, an image forming element, a projection lens, and the like.
  • the light emitted from the light source is converted into an image by the image forming element.
  • the light converted into an image is projected onto a screen, for example, through a projection lens.
  • those of conventional techniques can be arbitrarily adopted.
  • the projector 10 may further include a sensor that detects the tilt of the housing 12, for example, a biaxial acceleration sensor. Thereby, the inclination of the housing

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

Selon l'invention, l'influence d'une déformation d'un boîtier ou l'influence d'une déformation d'une base optique à l'intérieur du boîtier est réduite. Le boîtier du dispositif d'affichage par projection peut être fixé à une base de fixation, et un extensomètre (34) est prévu pour détecter une déformation.
PCT/JP2009/055650 2009-03-23 2009-03-23 Dispositif d'affichage par projection WO2010109577A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2009/055650 WO2010109577A1 (fr) 2009-03-23 2009-03-23 Dispositif d'affichage par projection
JP2011505689A JP5126413B2 (ja) 2009-03-23 2009-03-23 投写型表示装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/055650 WO2010109577A1 (fr) 2009-03-23 2009-03-23 Dispositif d'affichage par projection

Publications (1)

Publication Number Publication Date
WO2010109577A1 true WO2010109577A1 (fr) 2010-09-30

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Family Applications (1)

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PCT/JP2009/055650 WO2010109577A1 (fr) 2009-03-23 2009-03-23 Dispositif d'affichage par projection

Country Status (2)

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JP (1) JP5126413B2 (fr)
WO (1) WO2010109577A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114594648A (zh) * 2020-12-04 2022-06-07 卡西欧计算机株式会社 投影装置及投影装置的扩展单元

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10307202A (ja) * 1997-05-09 1998-11-17 Fujitsu General Ltd プロジェクタ用反射鏡及び光学歪み調整システム
JP2006165949A (ja) * 2004-12-07 2006-06-22 Seiko Epson Corp プロジェクタシステムおよびプロジェクタ
JP2007206226A (ja) * 2006-01-31 2007-08-16 Matsushita Electric Ind Co Ltd 光源装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10307202A (ja) * 1997-05-09 1998-11-17 Fujitsu General Ltd プロジェクタ用反射鏡及び光学歪み調整システム
JP2006165949A (ja) * 2004-12-07 2006-06-22 Seiko Epson Corp プロジェクタシステムおよびプロジェクタ
JP2007206226A (ja) * 2006-01-31 2007-08-16 Matsushita Electric Ind Co Ltd 光源装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114594648A (zh) * 2020-12-04 2022-06-07 卡西欧计算机株式会社 投影装置及投影装置的扩展单元
JP2022089480A (ja) * 2020-12-04 2022-06-16 カシオ計算機株式会社 投影装置及び投影装置の拡張ユニット
JP7205730B2 (ja) 2020-12-04 2023-01-17 カシオ計算機株式会社 投影装置及び投影装置の拡張ユニット

Also Published As

Publication number Publication date
JPWO2010109577A1 (ja) 2012-09-20
JP5126413B2 (ja) 2013-01-23

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