WO2010146704A1 - Projector, projection control method, and recording medium - Google Patents

Projector, projection control method, and recording medium Download PDF

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Publication number
WO2010146704A1
WO2010146704A1 PCT/JP2009/061202 JP2009061202W WO2010146704A1 WO 2010146704 A1 WO2010146704 A1 WO 2010146704A1 JP 2009061202 W JP2009061202 W JP 2009061202W WO 2010146704 A1 WO2010146704 A1 WO 2010146704A1
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Prior art keywords
projector
screen
image
detection
detection means
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PCT/JP2009/061202
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French (fr)
Japanese (ja)
Inventor
利一 大久保
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Ｎｅｃディスプレイソリューションズ株式会社
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Priority to JP2011519381A priority Critical patent/JP5288512B2/en
Priority to PCT/JP2009/061202 priority patent/WO2010146704A1/en
Publication of WO2010146704A1 publication Critical patent/WO2010146704A1/en

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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
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's

Definitions

  • the present invention relates to a projector, a projection control method, and a recording medium.
  • Patent Document 1 the amount of change in the position of the apparatus body is detected, and even if the position changes, the position, shape, and size of the projected image can be maintained.
  • a projector for performing is described. When the power is turned on, the projector turns on the light source lamp and projects an image corresponding to the image data.
  • Patent Document 2 describes a small projector built in a mobile phone. This small projector uses a battery as a power source, and when the operation is started, the light source is turned on and an image corresponding to the image data is projected.
  • the projector described in Patent Document 1 projects an image even when the image is not required to be projected when the power is on. Moreover, when the operation of the small projector described in Patent Document 2 is started, an image is projected even in a situation where it is not necessary to project the image. That is, the projector described in Patent Document 1 and the small projector described in Patent Document 2 project an image even in a situation where it is not necessary to project the image.
  • situations where projection of an image is not necessary include situations where a projector is being transported and situations where an image from a projector is being projected on something other than a screen.
  • wasteful power consumption is particularly a problem in a projector that uses a battery as a power source (for example, the projector described in Patent Document 2) because it shortens the drive time of the battery.
  • An object of the present invention is to provide a projector and a projection control method that can solve the above-described problems.
  • the projector according to the present invention is a projector that projects an image, and detects whether or not a screen exists in a projection direction of the image, and first detection means that detects whether or not the projector is stationary.
  • the projection control method of the present invention is a projection control method in a projector that projects an image, and detects whether or not the projector is in a stationary state and determines whether or not a screen exists in the projection direction of the image. If it is detected, the stationary state is detected, and the presence of a screen is detected, the video is projected.
  • the recording medium of the present invention includes a projection unit that projects an image, a first detection unit that detects whether or not the projector is stationary, and a first unit that detects whether or not a screen exists in the projection direction of the image.
  • the detection result of the first detection means indicates the stationary state, and the detection result of the second detection means indicates that a screen exists,
  • FIG. 1 is a block diagram showing a projector according to a first embodiment of the present invention.
  • 3 is a flowchart for explaining the operation of the projector shown in FIG. 1. It is the block diagram which showed the projector of 2nd Embodiment of this invention. It is the block diagram which showed the projector of 3rd Embodiment of this invention.
  • FIG. 1 is a block diagram showing a projector according to a first embodiment of the present invention.
  • the projector 1 includes an acceleration detector 11, a distance measuring device 12, and an image projection unit 13.
  • the video projection unit 13 includes a projection unit 14, a battery 15, a display control unit 16, and a storage unit 16a.
  • the projector 1 uses a battery 15 as a power source.
  • the projector 1 receives video data from a device such as a PC (Personal Computer) that can output video data, and projects a video corresponding to the video data.
  • a device such as a PC (Personal Computer) that can output video data, and projects a video corresponding to the video data.
  • the projector 1 is a small projector that fits in a pocket, for example.
  • the projector 1 is not limited to a small projector.
  • the acceleration detector 11 can be generally called first detection means (stationary state detection means).
  • the acceleration detector 11 detects whether or not the projector 1 is stationary.
  • the acceleration detector 11 is a semiconductor acceleration sensor, for example, and is in an unstable state (non-stationary state) such as the projector 1 being held by a user's hand, or the projector 1 is in a stable position such as a tabletop. It is detected whether it is placed (stationary state).
  • the acceleration detector 11 outputs the detection result to the distance measuring device 12 and the display control unit 16.
  • the acceleration detector 11 starts detecting whether or not the projector 1 is in a stationary state when a power button (not shown) of the projector 1 is operated and the power of the projector 1 is turned on.
  • the distance measuring device 12 can be generally referred to as second detection means (screen detection means).
  • the distance measuring device 12 detects whether or not a screen exists in the projection direction of the image by the projector 1.
  • the distance measuring device 12 includes, for example, an infrared distance sensor 12a and a determination unit 12b.
  • the infrared distance sensor 12a measures the distance from the projector 1 to an object (hereinafter simply referred to as “object”) existing in the direction in which the projector 1 projects an image.
  • the infrared distance sensor 12a measures the distance from the projector 1 to an object (for example, a screen) a plurality of times.
  • the infrared distance sensor 12a outputs the distance measurement result to the determination unit 12b.
  • the determination unit 12b determines whether the measurement result satisfies a condition for screen detection.
  • the determination unit 12b uses a condition that distances measured a plurality of times have the same value as a condition for screen detection.
  • the determination unit 12b When the measurement result of the infrared distance sensor 12a satisfies the condition for screen detection, the determination unit 12b outputs the detection result indicating that the screen exists to the display control unit 16. On the other hand, when the measurement result of the infrared distance sensor 12a does not satisfy the condition for screen detection, the determination unit 12b outputs a detection result indicating that the screen does not exist to the display control unit 16.
  • the distance measuring device 12 starts measuring the distance from the projector 1 to the object, and starts detecting whether or not a screen exists in the image projection direction. To do.
  • the image projection unit 13 can be generally called image projection means.
  • the image projection unit 13 projects an image corresponding to image data from a PC, for example. To do. Note that the image projection unit 13 does not project an image when the detection result of the acceleration detector 11 does not indicate a stationary state. Further, the image projection unit 13 does not project an image when the detection result of the distance measuring device 12 indicates that there is no screen.
  • the projection unit 14 projects an image corresponding to image data from a PC, for example.
  • the battery 15 mainly supplies a power supply voltage to the projection unit 14.
  • the display control unit 16 supplies power from the battery 15. A voltage is supplied to the projection unit 14. As a result, the projector 1 projects an image on the screen 2 and displays the image.
  • the projector 1 is moved and the display range of the image is changed from the screen 2. If there is a possibility of disconnection, the display control unit 16 stops supplying the power supply voltage from the battery 15 to the projection unit 14. Thereby, the display of the video from the projector 1 is stopped.
  • the display control unit 16 may be realized by a computer, for example.
  • the storage unit 16a can be generally called a computer-readable recording medium.
  • the storage unit 16 a stores a program that defines the procedure performed by the display control unit 16. This program may be downloaded to the storage unit 16a from a predetermined site via a communication line, for example.
  • the display control unit 16 When the display control unit 16 is realized by a computer, the computer functions as the display control unit 16 by reading and executing a program recorded in the storage unit 16a.
  • the display control unit 16 is realized by birdware such as a logic circuit and does not need to read and execute a program in the storage unit 16a, the storage unit 16a may be omitted.
  • FIG. 2 is a flowchart for explaining the operation of the projector 1. Hereinafter, the operation of the projector 1 will be described with reference to FIG.
  • step S101 When a power button (not shown) of the projector 1 is operated to turn on the power of the projector 1 (step S101), the acceleration detector 11 starts detecting whether or not the projector 1 is stationary (step S101). S102).
  • the acceleration detector 11 When the projector 1 is not placed at a stable position and is being transported, for example, the acceleration detector 11 outputs a detection result indicating that the projector 1 is not stationary. On the other hand, when the projector 1 is placed at a stable position (flat position), the acceleration detector 11 outputs a detection result indicating that the projector 1 is stationary.
  • the acceleration detector 11 outputs the detection result to the distance measuring device 12 and the display control unit 16.
  • step S103 when the detection result of the acceleration detector 11 indicates that the projector 1 is not in a stationary state because the projector 1 is being transported (step S103), the display control unit 16 projects the power supply voltage from the battery 15. It is not supplied to the section 14. For this reason, the projector 1 does not project an image on the screen 2 and no image is displayed (step S107). When step S107 is executed, step S102 is subsequently executed.
  • the acceleration detector 11 detects that the projector 1 is stationary and outputs a detection result indicating that the projector 1 is stationary.
  • the distance measuring device 12 starts measuring the distance from the projector 1 to the object, and in the image projection direction. Start detecting if screen is present.
  • the distance measuring device 12 irradiates an infrared pulse in the image projection direction, for example, and receives an infrared pulse reflected from an object (for example, the screen 2) existing in the image projection direction. Is measured (step S104).
  • the distance measuring device 12 measures the time from irradiating the infrared pulse to receiving the infrared pulse reflected by the object, and measures the distance a based on the measurement time. Further, the distance measuring device 12 may measure the distance a based on the principle of triangulation based on the position where the infrared pulse reflected by the object is received.
  • the measurement of the distance a by the distance measuring device 12 is executed at a predetermined time interval for a predetermined time.
  • the distance measuring device 12 displays the screen in the image projection direction. It is determined that the screen exists, and a detection result indicating that the screen exists is output to the display control unit 16.
  • the distance measuring device 12 will project the image projection direction And the detection result indicating that there is no screen is output to the display control unit 16.
  • the display control unit 16 supplies the power supply voltage from the battery 15 to the projection unit 14 when the detection result of the distance measuring device 12 indicates that a screen is present (step S105). Thereby, the projector 1 projects an image on the screen 2 and starts displaying the image (step S106). When step S106 is executed, step S102 is subsequently executed.
  • the display control unit 16 stops supplying the power supply voltage from the battery 15 to the projection unit 14. Thereby, the output of the video from the projector 1 is stopped (step S107).
  • the image projection unit 13 projects an image on the screen 2 when the projector 1 is in a stationary state and the screen 2 is detected.
  • the projector 1 is being transported or the image is projected in a situation where the image from the projector 1 is projected on something other than the screen, that is, in a situation where the projection of the image is not necessary. Can be prevented. Therefore, it is possible to avoid projecting an image to a place unintended by the user. Therefore, it is possible to reduce wasteful power consumption. Further, in a projector that uses a battery as a power source, it is possible to extend the drive time of the battery.
  • the distance measuring device 12 measures the distance to an object existing in the image projection direction, and if the measurement result satisfies the condition for screen detection, the detection result indicating that the screen exists. Is output.
  • the distance measuring device 12 measures the distance to the object existing in the image projection direction a plurality of times, and the condition that the distance measured a plurality of times is the same value as a condition for screen detection. Is used.
  • the acceleration detector 11 when the power of the projector 1 is turned on, the acceleration detector 11 starts detecting whether or not the projector 1 is stationary, and the distance measuring device 12 detects the acceleration detector 11. When the result indicates a stationary state, detection of whether or not there is a screen in the image projection direction is started.
  • the distance measuring unit 12 can be operated only when the screen needs to be detected. Therefore, it is possible to reduce power consumption in the distance measuring unit 12.
  • the distance measuring device 12 when the power of the projector 1 is turned on, the distance measuring device 12 starts detecting whether or not there is a screen in the image projection direction, and the detection result of the distance measuring device 12 is the screen.
  • the acceleration detector 11 may be modified to start detecting whether or not the projector 1 is stationary.
  • the acceleration detector 11 can be operated only when it is necessary to detect whether or not the projector 1 is stationary. Therefore, it is possible to reduce power consumption in the acceleration detector 11.
  • the distance measuring device 12 is used as the first detecting means (screen detecting means), but the first detecting means is not limited to the distance measuring device 12 and can be changed as appropriate.
  • the first detection unit including a two-dimensional image sensor and an image processing unit may be used as the first detection unit.
  • the two-dimensional image sensor generates image data indicating an image in the projection direction of the video, and outputs the image data to the image processing unit.
  • the image processing unit analyzes the image data and determines whether a white rectangular area (screen area) having a predetermined size or larger exists in the image indicated by the image data. to decide.
  • the image processing unit When a white rectangular area having a predetermined size or more exists in the image indicated by the image data, the image processing unit outputs a detection result indicating that the screen exists in the video projection direction. On the other hand, when a white rectangular area having a predetermined size or larger does not exist in the image indicated by the image data, the image processing unit outputs a detection result indicating that there is no screen in the video projection direction.
  • a battery is used as the power source, but it may be modified so that a commercial AC power source is used as the power source.
  • FIG. 3 is a block diagram showing a projector according to the second embodiment of the present invention. 3, the same components as those shown in FIG. 1 are denoted by the same reference numerals.
  • the projector 1A of the second embodiment is different from the projector 1 of the first embodiment in that the setting storage unit 17 is added and the screen detection method by the distance measuring device 12 is different.
  • the setting storage unit 17 and the distance measuring device 12 are included in the screen detection unit 18.
  • Screen detector 18 can generally be referred to as second detection means (screen detection means).
  • the projector 1A will be described focusing on differences from the projector 1.
  • the projector 1 of the first embodiment detects the presence of a screen when the distance a measured a plurality of times by the distance measuring device 12 shows the same value. For this reason, when there is no wall in the direction in which the projector 1 is directed, that is, the image projection direction, and there is a wall that the user does not recognize as a screen in the distance, the projector 1 uses the wall as a screen. Misdetected. In this case, the projector 1 projects an image on a wall that the user does not recognize as a screen.
  • the setting storage unit 17 holds data indicating a predetermined distance range (b to c).
  • the distance range (b to c) is set in advance according to the screen size intended by the user.
  • the determination unit 12b uses a condition that the measurement result of the infrared distance sensor 12a is included in the distance range (b to c) as a condition for screen detection.
  • the determination unit 12b reads the data in the setting storage unit 17 and recognizes the distance range (b to c). When the measurement result of the infrared distance sensor 12a is included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that a screen exists. On the other hand, when the measurement result of the infrared distance sensor 12a is not included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that there is no screen.
  • the determination unit 12b outputs a detection result indicating that a screen exists when a plurality of measurement results of the infrared distance sensor 12a are included in the distance range (b to c). On the other hand, when the plurality of measurement results of the infrared distance sensor 12a are not included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that there is no screen.
  • the screen detection unit 18 includes, as a condition for screen detection, a measurement result indicating a distance from the projector 1 to an object existing in the image projection direction is included in the distance range (b to c). This condition is used.
  • FIG. 4 is a block diagram showing a projector according to a third embodiment of the invention. 4, the same components as those shown in FIG. 3 are denoted by the same reference numerals.
  • the distance measuring device 12 when the status display unit 19 is added and when the power of the projector 1B is turned on, the distance measuring device 12 starts detecting the screen, and the distance measuring device 12 displays the screen.
  • the acceleration detector 11 is different from the projector 1A of the second embodiment in that it starts detecting whether or not the projector 1B is in a stationary state.
  • the projector 1B will be described focusing on differences from the projector 1A.
  • the status display unit 19 can be generally called display means.
  • the status display unit 19 is a display device such as a liquid crystal display device.
  • the distance measuring device 12 measures the distance to an object (for example, a screen) existing in the image projection direction.
  • the user had to fix the projector 1A at an arbitrary position in a situation where the user cannot recognize whether the distance from the projector to the object is included in the distance range (b to c).
  • the distance measuring device 12 starts measuring the distance a from the projector 1B to the object when the power of the projector 1 is turned on.
  • the state display unit 19 determines the value closest to the measurement result among the values in the distance range (b to c), and the measurement The difference between the result and the result is displayed.
  • the user can fix the projector 1B at a position where the distance from the projector 1B to the object is included in the distance range (b to c) while referring to the difference displayed on the status display unit 19. .
  • the distance measuring device 12 When the measurement result of the distance measuring device 12 is included in the distance range (b to c), the distance measuring device 12 outputs a detection result indicating that the screen exists to the acceleration detector 11 and the display control unit 16.
  • the acceleration detector 11 starts detecting whether or not the projector 1B is stationary when the detection result of the distance measuring device 12 indicates that a screen is present.
  • the acceleration detector 11 detects that the projector 1B is in a stationary state, it outputs a detection result indicating that the projector 1B is in a stationary state to the display control unit 16.
  • the display control unit 16 supplies a power supply voltage from the battery 15 to the projection unit 14 when the detection result of the acceleration detector 11 indicates that the projector 1B is in a stationary state. As a result, the projector 1B projects an image on the screen 2 and starts displaying the image.
  • the distance measuring device 12 measures the distance to the object existing in the image projection direction, When the measurement result of the distance measuring device 12 is out of the distance range (b to c), the status display unit 19 determines the value closest to the measurement result among the values in the distance range (b to c) and the measurement. You may display the difference with a result.
  • the state display unit 19 displays the measurement result among the values in the distance range (b to c). The difference between the closest value and the measurement result is displayed.
  • the user can fix the projector 1B at a position where the distance from the projector 1B to the object is included in the distance range (b to c) while referring to the difference displayed on the status display unit 19. become. Therefore, the user can easily determine the installation position of the projector 1B.

Abstract

Disclosed is a projector (1) for projecting an image. The projector (1) comprises a first detection means (11) for detecting whether or not the projector (1) is in a still state, a second detection means (12) for detecting whether or not a screen is present in the image projecting direction, and an image projection means (13) for projecting the image, if the detection result of the first detection means (11) indicates the still state and if the detection result of the second detection means (12) indicates the presence of the screen.

Description

プロジェクタ、投写制御方法および記録媒体Projector, projection control method, and recording medium
　本発明は、プロジェクタ、投写制御方法および記録媒体に関する。 The present invention relates to a projector, a projection control method, and a recording medium.
　種々のプロジェクタが知られている。 Various projectors are known.
　特許文献１には、装置本体の位置の変化量を検出し、位置が変化しても投影画像の位置、形状および大きさを保持できるように、その検出結果に応じて、投影画像の画像調整を行うプロジェクタが記載されている。なお、このプロジェクタは、電源がオンされると、光源ランプを点灯して、映像データに応じた映像を投写する。 In Patent Document 1, the amount of change in the position of the apparatus body is detected, and even if the position changes, the position, shape, and size of the projected image can be maintained. A projector for performing is described. When the power is turned on, the projector turns on the light source lamp and projects an image corresponding to the image data.
　特許文献２には、携帯型電話機に内蔵された小型プロジェクタが記載されている。この小型プロジェクタは、電源としてバッテリーを用い、動作が開始されると、光源を点灯して、映像データに応じた映像を投写する。 Patent Document 2 describes a small projector built in a mobile phone. This small projector uses a battery as a power source, and when the operation is started, the light source is turned on and an image corresponding to the image data is projected.
特開２００９－７５１４７号公報JP 2009-75147 A 特開２００５－２９２４２８号公報JP 2005-292428 A
　特許文献１に記載のプロジェクタは、電源がオンになっていると、映像の投写が必要ない状況でも、映像を投写してしまう。また、特許文献２に記載の小型プロジェクタは、動作が開始されると、映像の投写が必要ない状況でも、映像を投写してしまう。つまり、特許文献１に記載のプロジェクタおよび特許文献２に記載の小型プロジェクタは、映像の投写が必要ない状況でも、映像を投写してしまう。 The projector described in Patent Document 1 projects an image even when the image is not required to be projected when the power is on. Moreover, when the operation of the small projector described in Patent Document 2 is started, an image is projected even in a situation where it is not necessary to project the image. That is, the projector described in Patent Document 1 and the small projector described in Patent Document 2 project an image even in a situation where it is not necessary to project the image.
　なお、映像の投写が必要ない状況としては、例えば、プロジェクタが運搬されている状況、および、プロジェクタからの映像がスクリーン以外のものに投写されている状況が挙げられる。 Note that examples of situations where projection of an image is not necessary include situations where a projector is being transported and situations where an image from a projector is being projected on something other than a screen.
　映像の投写が必要ない状況で、映像が投写されると、無駄な電力が消費されるという課題が生じる。 When a video is projected in a situation where it is not necessary to project a video, there arises a problem that wasteful power is consumed.
　なお、無駄な電力の消費は、電源としてバッテリーを使用するプロジェクタ（例えば、特許文献２に記載のプロジェクタ）では、バッテリーによる駆動時間の短縮につながるため、特に問題となる。 Note that wasteful power consumption is particularly a problem in a projector that uses a battery as a power source (for example, the projector described in Patent Document 2) because it shortens the drive time of the battery.
　本発明の目的は、上述した課題を解決可能なプロジェクタおよび投写制御方法を提供することである。 An object of the present invention is to provide a projector and a projection control method that can solve the above-described problems.
　本発明のプロジェクタは、映像を投写するプロジェクタであって、前記プロジェクタが静止状態であるか否かを検出する第１検出手段と、前記映像の投写方向にスクリーンが存在するか否かを検出する第２検出手段と、前記第１検出手段の検出結果が前記静止状態を示し、かつ、前記第２検出手段の検出結果がスクリーンが存在することを示す場合、前記映像を投写する映像投写手段と、を含む。 The projector according to the present invention is a projector that projects an image, and detects whether or not a screen exists in a projection direction of the image, and first detection means that detects whether or not the projector is stationary. A second detection means, and a video projection means for projecting the video when the detection result of the first detection means indicates the stationary state and the detection result of the second detection means indicates that a screen exists. ,including.
　本発明の投写制御方法は、映像を投写するプロジェクタでの投写制御方法であって、前記プロジェクタが静止状態であるか否かを検出し、前記映像の投写方向にスクリーンが存在するか否かを検出し、前記静止状態を検出し、かつ、スクリーンが存在することを検出した場合、前記映像を投写する。 The projection control method of the present invention is a projection control method in a projector that projects an image, and detects whether or not the projector is in a stationary state and determines whether or not a screen exists in the projection direction of the image. If it is detected, the stationary state is detected, and the presence of a screen is detected, the video is projected.
　本発明の記録媒体は、映像を投写する投写手段と、プロジェクタが静止状態であるか否かを検出する第１検出手段と、前記映像の投写方向にスクリーンが存在するか否かを検出する第２検出手段と、を備えたプロジェクタ内のコンピュータに、前記第１検出手段の検出結果が前記静止状態を示し、かつ、前記第２検出手段の検出結果がスクリーンが存在することを示す場合、前記投写手段に前記映像を投写させる映像投写手順を実行させるためのプログラムを記録したコンピュータ読み取り可能な記録媒体である。 The recording medium of the present invention includes a projection unit that projects an image, a first detection unit that detects whether or not the projector is stationary, and a first unit that detects whether or not a screen exists in the projection direction of the image. The detection result of the first detection means indicates the stationary state, and the detection result of the second detection means indicates that a screen exists, A computer-readable recording medium having recorded thereon a program for causing a projection means to project a video projection procedure.
　本発明によれば、プロジェクタでの無駄な電力消費を少なくすることが可能になる。 According to the present invention, it is possible to reduce wasteful power consumption in the projector.
本発明の第１実施形態のプロジェクタを示したブロック図である。1 is a block diagram showing a projector according to a first embodiment of the present invention. 図１に示したプロジェクタの動作を説明するためのフローチャートである。3 is a flowchart for explaining the operation of the projector shown in FIG. 1. 本発明の第２実施形態のプロジェクタを示したブロック図である。It is the block diagram which showed the projector of 2nd Embodiment of this invention. 本発明の第３実施形態のプロジェクタを示したブロック図である。It is the block diagram which showed the projector of 3rd Embodiment of this invention.
　以下、本発明の実施形態を図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　（第１実施形態）
　図１は、本発明の第１実施形態のプロジェクタを示したブロック図である。 (First embodiment)
FIG. 1 is a block diagram showing a projector according to a first embodiment of the present invention.
　図１において、プロジェクタ１は、加速度検出器１１と、距離測定器１２と、映像投写部１３と、を含む。映像投写部１３は、投写部１４と、バッテリー１５と、表示制御部１６と、格納部１６ａと、を含む。 In FIG. 1, the projector 1 includes an acceleration detector 11, a distance measuring device 12, and an image projection unit 13. The video projection unit 13 includes a projection unit 14, a battery 15, a display control unit 16, and a storage unit 16a.
　プロジェクタ１は、電源として、バッテリー１５を使用する。プロジェクタ１は、ＰＣ（Personal　Computer）等の映像データを出力可能な装置から映像データを受け付け、その映像データに応じた映像を投写する。プロジェクタ１は、例えば、ポケットに入るサイズの小型プロジェクタである。なお、プロジェクタ１は、小型プロジェクタに限るものではない。 The projector 1 uses a battery 15 as a power source. The projector 1 receives video data from a device such as a PC (Personal Computer) that can output video data, and projects a video corresponding to the video data. The projector 1 is a small projector that fits in a pocket, for example. The projector 1 is not limited to a small projector.
　加速度検出器１１は、一般的に第１検出手段（静止状態検出手段）と呼ぶことができる。加速度検出器１１は、プロジェクタ１が静止状態であるか否かを検出する。加速度検出器１１は、例えば、半導体加速度センサであり、プロジェクタ１が使用者の手に握られているなどの不安定な状態（非静止状態）であるか、プロジェクタ１が卓上など安定した位置に置かれている状態（静止状態）であるかを検出する。加速度検出器１１は、検出結果を、距離測定器１２と表示制御部１６に出力する。 The acceleration detector 11 can be generally called first detection means (stationary state detection means). The acceleration detector 11 detects whether or not the projector 1 is stationary. The acceleration detector 11 is a semiconductor acceleration sensor, for example, and is in an unstable state (non-stationary state) such as the projector 1 being held by a user's hand, or the projector 1 is in a stable position such as a tabletop. It is detected whether it is placed (stationary state). The acceleration detector 11 outputs the detection result to the distance measuring device 12 and the display control unit 16.
　なお、加速度検出器１１は、プロジェクタ１の電源ボタン（不図示）が操作されて、プロジェクタ１の電源がオンになると、プロジェクタ１が静止状態であるか否かの検出を開始する。 The acceleration detector 11 starts detecting whether or not the projector 1 is in a stationary state when a power button (not shown) of the projector 1 is operated and the power of the projector 1 is turned on.
　距離測定器１２は、一般的に第２検出手段（スクリーン検出手段）と呼ぶことができる。距離測定器１２は、プロジェクタ１による映像の投写方向にスクリーンが存在するか否かを検出する。距離測定器１２は、例えば、赤外線距離センサ１２ａと、判定部１２ｂと、を含む。 The distance measuring device 12 can be generally referred to as second detection means (screen detection means). The distance measuring device 12 detects whether or not a screen exists in the projection direction of the image by the projector 1. The distance measuring device 12 includes, for example, an infrared distance sensor 12a and a determination unit 12b.
　赤外線距離センサ１２ａは、プロジェクタ１から、プロジェクタ１による映像の投写方向に存在する物体（以下、単に「物体」と称する）まで、の距離を測定する。本実施形態では、赤外線距離センサ１２ａは、プロジェクタ１から物体（例えば、スクリーン）までの距離を複数回測定する。赤外線距離センサ１２ａは、距離の測定結果を、判定部１２ｂに出力する。 The infrared distance sensor 12a measures the distance from the projector 1 to an object (hereinafter simply referred to as “object”) existing in the direction in which the projector 1 projects an image. In the present embodiment, the infrared distance sensor 12a measures the distance from the projector 1 to an object (for example, a screen) a plurality of times. The infrared distance sensor 12a outputs the distance measurement result to the determination unit 12b.
　判定部１２ｂは、赤外線距離センサ１２ａの測定結果を受け付けると、その測定結果が、スクリーン検出用の条件を満たしているかを判定する。なお、本実施形態では、判定部１２ｂは、スクリーン検出用の条件として、複数回測定された距離が同じ値であるという条件を用いる。 When the determination unit 12b receives the measurement result of the infrared distance sensor 12a, the determination unit 12b determines whether the measurement result satisfies a condition for screen detection. In the present embodiment, the determination unit 12b uses a condition that distances measured a plurality of times have the same value as a condition for screen detection.
　赤外線距離センサ１２ａの測定結果が、スクリーン検出用の条件を満たしている場合、判定部１２ｂは、スクリーンが存在する旨の検出結果を、表示制御部１６に出力する。一方、赤外線距離センサ１２ａの測定結果が、スクリーン検出用の条件を満たしていない場合、判定部１２ｂは、スクリーンが存在しない旨の検出結果を、表示制御部１６に出力する。 When the measurement result of the infrared distance sensor 12a satisfies the condition for screen detection, the determination unit 12b outputs the detection result indicating that the screen exists to the display control unit 16. On the other hand, when the measurement result of the infrared distance sensor 12a does not satisfy the condition for screen detection, the determination unit 12b outputs a detection result indicating that the screen does not exist to the display control unit 16.
　距離測定器１２は、加速度検出器１１の検出結果が静止状態を示すと、プロジェクタ１から物体までの距離の測定を開始して、映像の投写方向にスクリーンが存在するか否かの検出を開始する。 When the detection result of the acceleration detector 11 indicates a stationary state, the distance measuring device 12 starts measuring the distance from the projector 1 to the object, and starts detecting whether or not a screen exists in the image projection direction. To do.
　映像投写部１３は、一般的に映像投写手段と呼ぶことができる。映像投写部１３は、加速度検出器１１の検出結果が静止状態を示し、かつ、距離測定器１２の検出結果がスクリーンが存在することを示す場合、例えばＰＣからの映像データに応じた映像を投写する。なお、映像投写部１３は、加速度検出器１１の検出結果が静止状態を示さない場合、映像の投写を行わない。また、映像投写部１３は、距離測定器１２の検出結果がスクリーンが存在しないことを示す場合、映像の投写を行わない。 The image projection unit 13 can be generally called image projection means. When the detection result of the acceleration detector 11 indicates a stationary state and the detection result of the distance measuring device 12 indicates that a screen exists, the image projection unit 13 projects an image corresponding to image data from a PC, for example. To do. Note that the image projection unit 13 does not project an image when the detection result of the acceleration detector 11 does not indicate a stationary state. Further, the image projection unit 13 does not project an image when the detection result of the distance measuring device 12 indicates that there is no screen.
　投写部１４は、バッテリー１５から電源電圧が供給されると、例えばＰＣからの映像データに応じた映像を投写する。 When the power supply voltage is supplied from the battery 15, the projection unit 14 projects an image corresponding to image data from a PC, for example.
　バッテリー１５は、主に投写部１４に対して電源電圧を供給する。 The battery 15 mainly supplies a power supply voltage to the projection unit 14.
　表示制御部１６は、加速度検出器１１が、プロジェクタ１が安定した場所に置かれていること（静止状態）を検出し、かつ、距離測定器１２がスクリーン２を検出すると、バッテリー１５からの電源電圧を投写部１４に供給する。これにより、プロジェクタ１は、スクリーン２に映像を投写して映像の表示を行う。 When the acceleration detector 11 detects that the projector 1 is placed in a stable place (stationary state) and the distance measuring device 12 detects the screen 2, the display control unit 16 supplies power from the battery 15. A voltage is supplied to the projection unit 14. As a result, the projector 1 projects an image on the screen 2 and displays the image.
　一方、プロジェクタ１とスクリーン２の間に障害物が入り、赤外線距離センサ１２ａの測定結果が、スクリーン検出用の条件を満たさなくなった場合や、プロジェクタ１が移動されて映像の表示範囲がスクリーン２から外れる可能性が生じた場合は、表示制御部１６は、バッテリー１５からの電源電圧を投写部１４へ供給することを停止する。これにより、プロジェクタ１からの映像の表示が中止される。 On the other hand, when an obstacle enters between the projector 1 and the screen 2 and the measurement result of the infrared distance sensor 12a does not satisfy the conditions for screen detection, the projector 1 is moved and the display range of the image is changed from the screen 2. If there is a possibility of disconnection, the display control unit 16 stops supplying the power supply voltage from the battery 15 to the projection unit 14. Thereby, the display of the video from the projector 1 is stopped.
　表示制御部１６は、例えば、コンピュータで実現されてもよい。 The display control unit 16 may be realized by a computer, for example.
　格納部１６ａは、一般的に、コンピュータにて読み取り可能な記録媒体と呼ぶことができる。格納部１６ａは、表示制御部１６が行う手順を規定したプログラムを格納する。なお、このプログラムは、例えば、予め定められたサイトから、通信回線を介して、格納部１６ａにダウンロードされてもよい。 The storage unit 16a can be generally called a computer-readable recording medium. The storage unit 16 a stores a program that defines the procedure performed by the display control unit 16. This program may be downloaded to the storage unit 16a from a predetermined site via a communication line, for example.
　表示制御部１６がコンピュータで実現される場合、そのコンピュータは、格納部１６ａに記録されたプログラムを読み取り実行することによって、表示制御部１６として機能する。 When the display control unit 16 is realized by a computer, the computer functions as the display control unit 16 by reading and executing a program recorded in the storage unit 16a.
　なお、表示制御部１６が、論理回路等のバードウェアで実現され、格納部１６ａ内のプロクラムを読み取り実行する必要がない場合、格納部１６ａは、省略されてもよい。 If the display control unit 16 is realized by birdware such as a logic circuit and does not need to read and execute a program in the storage unit 16a, the storage unit 16a may be omitted.
　次に、動作を説明する。 Next, the operation will be described.
　図２は、プロジェクタ１の動作を説明するためのフローチャートである。以下、図２を参照して、プロジェクタ１の動作を説明する。 FIG. 2 is a flowchart for explaining the operation of the projector 1. Hereinafter, the operation of the projector 1 will be described with reference to FIG.
　プロジェクタ１の電源ボタン（不図示）が操作されて、プロジェクタ１の電源がオンになると（ステップＳ１０１）、加速度検出器１１は、プロジェクタ１が静止状態であるか否かの検出を開始する（ステップＳ１０２）。 When a power button (not shown) of the projector 1 is operated to turn on the power of the projector 1 (step S101), the acceleration detector 11 starts detecting whether or not the projector 1 is stationary (step S101). S102).
　プロジェクタ１が、安定した位置に置かれておらず、例えば運搬されている場合には、加速度検出器１１は、プロジェクタ１が静止状態でない旨の検出結果を出力する。一方、プロジェクタ１が安定した位置（平坦な位置）に置かれている場合には、加速度検出器１１は、プロジェクタ１が静止状態である旨の検出結果を出力する。 When the projector 1 is not placed at a stable position and is being transported, for example, the acceleration detector 11 outputs a detection result indicating that the projector 1 is not stationary. On the other hand, when the projector 1 is placed at a stable position (flat position), the acceleration detector 11 outputs a detection result indicating that the projector 1 is stationary.
　加速度検出器１１は、その検出結果を、距離測定器１２と表示制御部１６に出力する。 The acceleration detector 11 outputs the detection result to the distance measuring device 12 and the display control unit 16.
　例えば、プロジェクタ１が運搬されているために、加速度検出器１１の検出結果が、プロジェクタ１が静止状態でないことを示す場合（ステップＳ１０３）、表示制御部１６は、バッテリー１５からの電源電圧を投写部１４へ供給しない。このため、プロジェクタ１は、スクリーン２に映像を投写せず、映像の表示は行われない（ステップＳ１０７）。ステップＳ１０７が実行されると、続いて、ステップＳ１０２が実行される。 For example, when the detection result of the acceleration detector 11 indicates that the projector 1 is not in a stationary state because the projector 1 is being transported (step S103), the display control unit 16 projects the power supply voltage from the battery 15. It is not supplied to the section 14. For this reason, the projector 1 does not project an image on the screen 2 and no image is displayed (step S107). When step S107 is executed, step S102 is subsequently executed.
　使用者がプロジェクタ１を平坦な場所に置くと、加速度検出器１１は、プロジェクタ１が静止状態であることを検出し、プロジェクタ１が静止状態である旨の検出結果を出力する。 When the user places the projector 1 on a flat place, the acceleration detector 11 detects that the projector 1 is stationary and outputs a detection result indicating that the projector 1 is stationary.
　加速度検出器１１の検出結果が、プロジェクタ１が静止状態であることを示すと（ステップＳ１０３）、距離測定器１２は、プロジェクタ１から物体までの距離の測定を開始して、映像の投写方向にスクリーンが存在するか否かの検出を開始する。 When the detection result of the acceleration detector 11 indicates that the projector 1 is in a stationary state (step S103), the distance measuring device 12 starts measuring the distance from the projector 1 to the object, and in the image projection direction. Start detecting if screen is present.
　距離測定器１２は、例えば、映像の投写方向に赤外線パルスを照射し、映像の投写方向に存在する物体（例えば、スクリーン２）からの反射された赤外線パルスを受信することで、プロジェクタ１から物体までの距離ａを測定する（ステップＳ１０４）。 The distance measuring device 12 irradiates an infrared pulse in the image projection direction, for example, and receives an infrared pulse reflected from an object (for example, the screen 2) existing in the image projection direction. Is measured (step S104).
　例えば、距離測定器１２は、赤外線パルスを照射してから、物体で反射された赤外線パルスを受信するまでの時間を計測し、その計測時間に基づいて、距離ａを測定する。また、距離測定器１２は、物体で反射された赤外線パルスを受信した位置に基づいて、三角測量の原理で距離ａを測定してもよい。 For example, the distance measuring device 12 measures the time from irradiating the infrared pulse to receiving the infrared pulse reflected by the object, and measures the distance a based on the measurement time. Further, the distance measuring device 12 may measure the distance a based on the principle of triangulation based on the position where the infrared pulse reflected by the object is received.
　距離測定器１２による距離ａの測定は、一定時間間隔ごとに、予め定められた時間実行される。 The measurement of the distance a by the distance measuring device 12 is executed at a predetermined time interval for a predetermined time.
　距離測定器１２は、一定時間間隔ごとに測定された距離ａが一定期間同じ値を示すと、つまり、距離の測定結果がスクリーン検出用の条件を満たしていると、映像の投写方向にスクリーンが存在すると判断し、スクリーンが存在する旨の検出結果を、表示制御部１６に出力する。 When the distance a measured at a certain time interval shows the same value for a certain period of time, that is, when the distance measurement result satisfies the conditions for screen detection, the distance measuring device 12 displays the screen in the image projection direction. It is determined that the screen exists, and a detection result indicating that the screen exists is output to the display control unit 16.
　一方、一定時間間隔ごとに測定された距離ａが一定期間同じ値を示さないと、つまり、距離の測定結果がスクリーン検出用の条件を満たしていないと、距離測定器１２は、映像の投写方向にスクリーンが存在しないと判断し、スクリーンが存在しない旨の検出結果を、表示制御部１６に出力する。 On the other hand, if the distance a measured at certain time intervals does not show the same value for a certain period of time, that is, if the distance measurement result does not satisfy the conditions for screen detection, the distance measuring device 12 will project the image projection direction And the detection result indicating that there is no screen is output to the display control unit 16.
　表示制御部１６は、距離測定器１２の検出結果が、スクリーンが存在することを示す場合（ステップＳ１０５）、バッテリー１５からの電源電圧を投写部１４に供給する。これにより、プロジェクタ１は、スクリーン２に映像を投写して映像の表示を開始する（ステップＳ１０６）。ステップＳ１０６が実行されると、続いて、ステップＳ１０２が実行される。 The display control unit 16 supplies the power supply voltage from the battery 15 to the projection unit 14 when the detection result of the distance measuring device 12 indicates that a screen is present (step S105). Thereby, the projector 1 projects an image on the screen 2 and starts displaying the image (step S106). When step S106 is executed, step S102 is subsequently executed.
　映像の出力後に、距離測定器１２で複数回測定された距離が同じ値を示さない、または、加速度検出器１１によってプロジェクタ１の移動が検出された場合には、プロジェクタ１での映像の出力条件（距離測定器１２の測定結果がスクリーン検出用の条件を満たし、かつ、加速度検出器１１がプロジェクタ１の静止状態を検出すること）が満たされなくなる。この場合、表示制御部１６は、バッテリー１５からの電源電圧を投写部１４へ供給することを停止する。これにより、プロジェクタ１からの映像の出力が中止される（ステップＳ１０７）。 If the distance measured a plurality of times by the distance measuring device 12 does not show the same value after the output of the image, or if the movement of the projector 1 is detected by the acceleration detector 11, the output condition of the image in the projector 1 (The measurement result of the distance measuring device 12 satisfies the condition for screen detection and the acceleration detector 11 detects the stationary state of the projector 1) is not satisfied. In this case, the display control unit 16 stops supplying the power supply voltage from the battery 15 to the projection unit 14. Thereby, the output of the video from the projector 1 is stopped (step S107).
　本実施形態によれば、映像投写部１３は、プロジェクタ１が静止状態であり、かつ、スクリーン２が検出された場合に、スクリーン２に映像を投写する。 According to this embodiment, the image projection unit 13 projects an image on the screen 2 when the projector 1 is in a stationary state and the screen 2 is detected.
　このため、例えば、プロジェクタ１が運搬されているか、または、プロジェクタ１からの映像がスクリーン以外のものに投写されている状況、つまり、映像の投写が必要ない状況で、映像が投写されることを防止できる。よって、使用者が意図しない場所に映像を投写することを避けることで可能となる。したがって、無駄な電力の消費を少なくすることが可能になる。また、バッテリーを電源として用いるプロジェクタでは、バッテリーでの駆動時間を延ばすことが可能になる。 For this reason, for example, the projector 1 is being transported or the image is projected in a situation where the image from the projector 1 is projected on something other than the screen, that is, in a situation where the projection of the image is not necessary. Can be prevented. Therefore, it is possible to avoid projecting an image to a place unintended by the user. Therefore, it is possible to reduce wasteful power consumption. Further, in a projector that uses a battery as a power source, it is possible to extend the drive time of the battery.
　また、本実施形態では、距離測定器１２は、映像の投写方向に存在する物体までの距離を測定し、その測定結果が、スクリーン検出用の条件を満たす場合、スクリーンが存在する旨の検出結果を出力する。 In the present embodiment, the distance measuring device 12 measures the distance to an object existing in the image projection direction, and if the measurement result satisfies the condition for screen detection, the detection result indicating that the screen exists. Is output.
　この場合、距離を測定する装置を用いて、スクリーンの存在を検出することが可能になる。 In this case, it is possible to detect the presence of the screen using a device for measuring the distance.
　また、本実施形態では、距離測定器１２は、映像の投写方向に存在する物体までの距離を複数回測定し、スクリーン検出用の条件として、複数回測定された距離が同じ値であるという条件を用いる。 Further, in the present embodiment, the distance measuring device 12 measures the distance to the object existing in the image projection direction a plurality of times, and the condition that the distance measured a plurality of times is the same value as a condition for screen detection. Is used.
　この場合、プロジェクタ１と映像の投写方向に存在する物体との間の距離における変動がなくなると、スクリーンが存在すると判定される。よって、プロジェクタ１が固定されていても、映像の投写方向に存在する物体が、人間のような動く物体であった場合に、その動く物体をスクリーンとして誤検出してしまうことを防止できる。 In this case, when there is no change in the distance between the projector 1 and the object existing in the image projection direction, it is determined that the screen exists. Therefore, even when the projector 1 is fixed, when a moving object such as a person is present in the image projection direction, it is possible to prevent the moving object from being erroneously detected as a screen.
　また、本実施形態では、加速度検出器１１は、プロジェクタ１の電源がオンになると、プロジェクタ１が静止状態であるか否かの検出を開始し、距離測定器１２は、加速度検出器１１の検出結果が静止状態を示すと、映像の投写方向にスクリーンが存在するか否かの検出を開始する。 In the present embodiment, when the power of the projector 1 is turned on, the acceleration detector 11 starts detecting whether or not the projector 1 is stationary, and the distance measuring device 12 detects the acceleration detector 11. When the result indicates a stationary state, detection of whether or not there is a screen in the image projection direction is started.
　この場合、スクリーンの検出が必要になったときだけ、距離測定部１２を動作させることができる。よって、距離測定部１２での電力消費を少なくすることが可能になる。 In this case, the distance measuring unit 12 can be operated only when the screen needs to be detected. Therefore, it is possible to reduce power consumption in the distance measuring unit 12.
　なお、本実施形態は、プロジェクタ１の電源がオンになると、距離測定器１２が、映像の投写方向にスクリーンが存在するか否かの検出を開始し、距離測定器１２の検出結果が、スクリーンが存在することを示すと、加速度検出器１１が、プロジェクタ１が静止状態であるか否かの検出を開始するように変形されてもよい。 In this embodiment, when the power of the projector 1 is turned on, the distance measuring device 12 starts detecting whether or not there is a screen in the image projection direction, and the detection result of the distance measuring device 12 is the screen. , The acceleration detector 11 may be modified to start detecting whether or not the projector 1 is stationary.
　この変形例では、プロジェクタ１が静止状態であるか否かの検出が必要になったときだけ、加速度検出器１１を動作させることができる。よって、加速度検出器１１での電力消費を少なくすることが可能になる。 In this modification, the acceleration detector 11 can be operated only when it is necessary to detect whether or not the projector 1 is stationary. Therefore, it is possible to reduce power consumption in the acceleration detector 11.
　また、本実施形態では、第１検出手段（スクリーン検出手段）として距離測定器１２が用いられたが、第１検出手段は、距離測定器１２に限らず適宜変更可能である。例えば、本実施形態において、第１検出手段として、２次元イメージセンサと画像処理部とを備えた第１検出部が用いられるように変形されてもよい。 In the present embodiment, the distance measuring device 12 is used as the first detecting means (screen detecting means), but the first detecting means is not limited to the distance measuring device 12 and can be changed as appropriate. For example, in the present embodiment, the first detection unit including a two-dimensional image sensor and an image processing unit may be used as the first detection unit.
　この変形例では、２次元イメージセンサは、映像の投写方向の画像を示す画像データを生成し、その画像データを画像処理部に出力する。画像処理部は、画像データを受け付けると、その画像データを解析して、その画像データが示す画像の中に、予め定められた大きさ以上の白色の矩形領域（スクリーン領域）が存在するかを判断する。 In this modification, the two-dimensional image sensor generates image data indicating an image in the projection direction of the video, and outputs the image data to the image processing unit. When the image processing unit receives the image data, the image processing unit analyzes the image data and determines whether a white rectangular area (screen area) having a predetermined size or larger exists in the image indicated by the image data. to decide.
　画像データが示す画像の中に、予め定められた大きさ以上の白色の矩形領域が存在する場合、画像処理部は、映像の投写方向にスクリーンが存在する旨の検出結果を出力する。一方、画像データが示す画像の中に、予め定められた大きさ以上の白色の矩形領域が存在しない場合、画像処理部は、映像の投写方向にスクリーンが存在しない旨の検出結果を出力する。 When a white rectangular area having a predetermined size or more exists in the image indicated by the image data, the image processing unit outputs a detection result indicating that the screen exists in the video projection direction. On the other hand, when a white rectangular area having a predetermined size or larger does not exist in the image indicated by the image data, the image processing unit outputs a detection result indicating that there is no screen in the video projection direction.
　また、本実施形態では、電源としてバッテリーが用いられたが、電源として商用交流電源が用いられるように変形されてもよい。 In this embodiment, a battery is used as the power source, but it may be modified so that a commercial AC power source is used as the power source.
　（第２実施形態）
　図３は、本発明の第２実施形態のプロジェクタを示したブロック図である。図３において、図１に示したものと同一構成のものには同一符号を付してある。 (Second Embodiment)
FIG. 3 is a block diagram showing a projector according to the second embodiment of the present invention. 3, the same components as those shown in FIG. 1 are denoted by the same reference numerals.
　第２実施形態のプロジェクタ１Ａは、設定記憶部１７が追加された点、および、距離測定器１２によるスクリーンの検出手法が、第１実施形態のプロジェクタ１と異なる。なお、本実施形態では、設定記憶部１７と距離測定器１２は、スクリーン検出部１８に含まれる。スクリーン検出部１８は、一般的に第２検出手段（スクリーン検出手段）と呼ぶことができる。以下、プロジェクタ１Ａについて、プロジェクタ１と異なる点を中心に説明する。 The projector 1A of the second embodiment is different from the projector 1 of the first embodiment in that the setting storage unit 17 is added and the screen detection method by the distance measuring device 12 is different. In the present embodiment, the setting storage unit 17 and the distance measuring device 12 are included in the screen detection unit 18. Screen detector 18 can generally be referred to as second detection means (screen detection means). Hereinafter, the projector 1A will be described focusing on differences from the projector 1.
　第１実施形態のプロジェクタ１は、距離測定器１２で複数回測定された距離ａが同じ値を示す場合、スクリーンが存在することを検出する。このため、プロジェクタ１を向けた方向、つまり、映像の投写方向に、スクリーンが無く、かつ、遠方に使用者がスクリーンと認識していない壁が存在する場合、プロジェクタ１は、その壁をスクリーンとして誤検出してしまう。この場合、プロジェクタ１は、使用者がスクリーンと認識していない壁に、映像を投写してしまう。 The projector 1 of the first embodiment detects the presence of a screen when the distance a measured a plurality of times by the distance measuring device 12 shows the same value. For this reason, when there is no wall in the direction in which the projector 1 is directed, that is, the image projection direction, and there is a wall that the user does not recognize as a screen in the distance, the projector 1 uses the wall as a screen. Misdetected. In this case, the projector 1 projects an image on a wall that the user does not recognize as a screen.
　第２実施形態のプロジェクタ１Ａでは、設定記憶部１７は、予め定められた距離範囲（ｂ～ｃ）を示すデータを保持する。距離範囲（ｂ～ｃ）は、使用者が意図したスクリーンのサイズに合わせて、予め設定される。 In the projector 1A of the second embodiment, the setting storage unit 17 holds data indicating a predetermined distance range (b to c). The distance range (b to c) is set in advance according to the screen size intended by the user.
　また、第２実施形態のプロジェクタ１Ａでは、判定部１２ｂは、スクリーン検出用の条件として、赤外線距離センサ１２ａの測定結果が、距離範囲（ｂ～ｃ）に含まれるという条件を用いる。 In the projector 1A of the second embodiment, the determination unit 12b uses a condition that the measurement result of the infrared distance sensor 12a is included in the distance range (b to c) as a condition for screen detection.
　判定部１２ｂは、設定記憶部１７内のデータを読み取って距離範囲（ｂ～ｃ）を認識する。判定部１２ｂは、赤外線距離センサ１２ａの測定結果が距離範囲（ｂ～ｃ）に含まれる場合には、スクリーンが存在する旨の検出結果を出力する。一方、赤外線距離センサ１２ａの測定結果が、距離範囲（ｂ～ｃ）に含まれない場合には、判定部１２ｂは、スクリーンが存在しない旨の検出結果を出力する。 The determination unit 12b reads the data in the setting storage unit 17 and recognizes the distance range (b to c). When the measurement result of the infrared distance sensor 12a is included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that a screen exists. On the other hand, when the measurement result of the infrared distance sensor 12a is not included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that there is no screen.
　本実施形態では、判定部１２ｂは、赤外線距離センサ１２ａの複数の測定結果が距離範囲（ｂ～ｃ）に含まれる場合に、スクリーンが存在する旨の検出結果を出力する。一方、赤外線距離センサ１２ａの複数の測定結果が、距離範囲（ｂ～ｃ）に含まれない場合には、判定部１２ｂは、スクリーンが存在しない旨の検出結果を出力する。 In the present embodiment, the determination unit 12b outputs a detection result indicating that a screen exists when a plurality of measurement results of the infrared distance sensor 12a are included in the distance range (b to c). On the other hand, when the plurality of measurement results of the infrared distance sensor 12a are not included in the distance range (b to c), the determination unit 12b outputs a detection result indicating that there is no screen.
　なお、プロジェクタ１Ａにおける他の動作、および、その変形例は、プロジェクタ１と同様である。 It should be noted that other operations in the projector 1A and modifications thereof are the same as those of the projector 1.
　本実施形態によれば、スクリーン検出部１８は、スクリーン検出用の条件として、プロジェクタ１から映像の投写方向に存在する物体までの距離を示す測定結果が、距離範囲（ｂ～ｃ）に含まれるという条件を用いる。 According to the present embodiment, the screen detection unit 18 includes, as a condition for screen detection, a measurement result indicating a distance from the projector 1 to an object existing in the image projection direction is included in the distance range (b to c). This condition is used.
　この場合、例えば、使用者がスクリーンと認識していない遠方の壁をスクリーンとして検出することを防止可能になる。つまり、プロジェクタ１Ａからの距離が予め定められた範囲となるスクリーンにのみ、映像を投写することが可能となる。したがって、スクリーンの誤検出が原因となって、意図しないスクリーンへ映像を投射してしまうことを防止可能になり、無駄な電力の消費を少なくすることが可能になる。また、バッテリーを電源として用いるプロジェクタでは、バッテリーでの駆動時間を延ばすことが可能になる。 In this case, for example, it is possible to prevent the user from detecting a distant wall that the user does not recognize as a screen. That is, it is possible to project an image only on a screen whose distance from the projector 1A is in a predetermined range. Therefore, it is possible to prevent an image from being projected onto an unintended screen due to erroneous screen detection, and it is possible to reduce wasteful power consumption. Further, in a projector that uses a battery as a power source, it is possible to extend the drive time of the battery.
　（第３実施形態）
　図４は、本発明の第３実施形態のプロジェクタを示したブロック図である。図４において、図３に示したものと同一構成のものには同一符号を付してある。 (Third embodiment)
FIG. 4 is a block diagram showing a projector according to a third embodiment of the invention. 4, the same components as those shown in FIG. 3 are denoted by the same reference numerals.
　第３実施形態のプロジェクタ１Ｂは、状態表示部１９が追加された点、および、プロジェクタ１Ｂの電源がオンされると、距離測定器１２がスクリーンの検出を開始し、距離測定器１２がスクリーンを検出してから、加速度検出器１１がプロジェクタ１Ｂは静止状態であるか否かの検出を開始する点が、第２実施形態のプロジェクタ１Ａと異なる。以下、プロジェクタ１Ｂについて、プロジェクタ１Ａと異なる点を中心に説明する。 In the projector 1B of the third embodiment, when the status display unit 19 is added and when the power of the projector 1B is turned on, the distance measuring device 12 starts detecting the screen, and the distance measuring device 12 displays the screen. After the detection, the acceleration detector 11 is different from the projector 1A of the second embodiment in that it starts detecting whether or not the projector 1B is in a stationary state. Hereinafter, the projector 1B will be described focusing on differences from the projector 1A.
　状態表示部１９は、一般的に表示手段と呼ぶことができる。状態表示部１９は、液晶表示装置のような表示デバイスである。 The status display unit 19 can be generally called display means. The status display unit 19 is a display device such as a liquid crystal display device.
　第２実施形態のプロジェクタ１Ａでは、プロジェクタ１Ａが固定されたことを加速度検出器１１が検出した後に、距離測定器１２が、映像の投写方向に存在する物体（例えば、スクリーン）までの距離を測定していた。 In the projector 1A of the second embodiment, after the acceleration detector 11 detects that the projector 1A is fixed, the distance measuring device 12 measures the distance to an object (for example, a screen) existing in the image projection direction. Was.
　この場合、使用者は、プロジェクタから物体までの距離が距離範囲（ｂ～ｃ）に含まれるかどうか認識できない状況で、プロジェクタ１Ａを任意の位置に固定しなければならなかった。 In this case, the user had to fix the projector 1A at an arbitrary position in a situation where the user cannot recognize whether the distance from the projector to the object is included in the distance range (b to c).
　第３実施形態のプロジェクタ１Ｂでは、距離測定器１２は、プロジェクタ１の電源がオンになると、プロジェクタ１Ｂから物体までの距離ａの測定を開始する。 In the projector 1B of the third embodiment, the distance measuring device 12 starts measuring the distance a from the projector 1B to the object when the power of the projector 1 is turned on.
　状態表示部１９は、距離測定器１２の測定結果が、距離範囲（ｂ～ｃ）から外れている場合、距離範囲（ｂ～ｃ）内の値のうち測定結果に最も近い値と、その測定結果と、の差を表示する。 When the measurement result of the distance measuring device 12 is out of the distance range (b to c), the state display unit 19 determines the value closest to the measurement result among the values in the distance range (b to c), and the measurement The difference between the result and the result is displayed.
　このため、使用者は、状態表示部１９に表示された差を参照しながら、プロジェクタ１Ｂから物体までの距離が距離範囲（ｂ～ｃ）に含まれる位置に、プロジェクタ１Ｂを固定することができる。 Therefore, the user can fix the projector 1B at a position where the distance from the projector 1B to the object is included in the distance range (b to c) while referring to the difference displayed on the status display unit 19. .
　距離測定器１２の測定結果が、距離範囲（ｂ～ｃ）に含まれると、距離測定器１２は、スクリーンが存在する旨の検出結果を、加速度検出器１１と表示制御部１６に出力する。 When the measurement result of the distance measuring device 12 is included in the distance range (b to c), the distance measuring device 12 outputs a detection result indicating that the screen exists to the acceleration detector 11 and the display control unit 16.
　加速度検出器１１は、距離測定器１２の検出結果が、スクリーンが存在することを示すと、プロジェクタ１Ｂが静止状態であるか否かの検出を開始する。 The acceleration detector 11 starts detecting whether or not the projector 1B is stationary when the detection result of the distance measuring device 12 indicates that a screen is present.
　その後、加速度検出器１１が、プロジェクタ１Ｂが静止状態であることを検出すると、プロジェクタ１Ｂが静止状態である旨の検出結果を、表示制御部１６に出力する。 Thereafter, when the acceleration detector 11 detects that the projector 1B is in a stationary state, it outputs a detection result indicating that the projector 1B is in a stationary state to the display control unit 16.
　表示制御部１６は、加速度検出器１１の検出結果が、プロジェクタ１Ｂが静止状態であることを示す場合、バッテリー１５からの電源電圧を投写部１４に供給する。これにより、プロジェクタ１Ｂは、スクリーン２に映像を投写して映像の表示を開始する。 The display control unit 16 supplies a power supply voltage from the battery 15 to the projection unit 14 when the detection result of the acceleration detector 11 indicates that the projector 1B is in a stationary state. As a result, the projector 1B projects an image on the screen 2 and starts displaying the image.
　なお、プロジェクタ１Ｂにおける他の動作、および、スクリーン検出手段の変形例は、プロジェクタ１Ａと同様である。 Note that other operations in the projector 1B and a modification of the screen detection means are the same as those in the projector 1A.
　また、プロジェクタ１Ｂは、プロジェクタ１Ａのように、プロジェクタ１Ａが固定されたことを加速度検出器１１が検出した後に、距離測定器１２が、映像の投写方向に存在する物体までの距離を測定し、距離測定器１２の測定結果が、距離範囲（ｂ～ｃ）から外れている場合、状態表示部１９が、距離範囲（ｂ～ｃ）内の値のうち測定結果に最も近い値と、その測定結果と、の差を表示してもよい。 Further, in the projector 1B, like the projector 1A, after the acceleration detector 11 detects that the projector 1A is fixed, the distance measuring device 12 measures the distance to the object existing in the image projection direction, When the measurement result of the distance measuring device 12 is out of the distance range (b to c), the status display unit 19 determines the value closest to the measurement result among the values in the distance range (b to c) and the measurement. You may display the difference with a result.
　本実施形態によれば、状態表示部１９は、距離測定器１２の測定結果が、距離範囲（ｂ～ｃ）から外れている場合、距離範囲（ｂ～ｃ）内の値のうち測定結果に最も近い値と、測定結果と、の差を表示する。 According to the present embodiment, when the measurement result of the distance measuring device 12 is out of the distance range (b to c), the state display unit 19 displays the measurement result among the values in the distance range (b to c). The difference between the closest value and the measurement result is displayed.
　このため、使用者は、状態表示部１９に表示された差を参照しながら、プロジェクタ１Ｂから物体までの距離が距離範囲（ｂ～ｃ）に含まれる位置に、プロジェクタ１Ｂを固定することが可能になる。よって、使用者が容易にプロジェクタ１Ｂの設置位置を決定することが可能になる。 Therefore, the user can fix the projector 1B at a position where the distance from the projector 1B to the object is included in the distance range (b to c) while referring to the difference displayed on the status display unit 19. become. Therefore, the user can easily determine the installation position of the projector 1B.
　以上、実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されるものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.
　　　１、１Ａ、１Ｂ　プロジェクタ
　　　１１　　　加速度検出器
　　　１２　　　距離測定器
　　　１２ａ　　赤外線距離センサ
　　　１２ｂ　　判定部
　　　１３　　　映像投写部
　　　１４　　　投写部
　　　１５　　　バッテリー
　　　１６　　　表示制御部
　　　１７　　　設定記憶部
　　　１８　　　スクリーン検出部
　　　１９　　　状態表示部
　　　２　　　　スクリーン DESCRIPTION OF SYMBOLS 1, 1A, 1B Projector 11 Acceleration detector 12 Distance measuring device 12a Infrared distance sensor 12b Judgment part 13 Image | video projection part 14 Projection part 15 Battery 16 Display control part 17 Setting memory | storage part 18 Screen detection part 19 Status display part 2 Screen

Claims (16)

  1. 　映像を投写するプロジェクタであって、
    　前記プロジェクタが静止状態であるか否かを検出する第１検出手段と、
    　前記映像の投写方向にスクリーンが存在するか否かを検出する第２検出手段と、
    　前記第１検出手段の検出結果が前記静止状態を示し、かつ、前記第２検出手段の検出結果がスクリーンが存在することを示す場合、前記映像を投写する映像投写手段と、を含むプロジェクタ。     A projector for projecting images,
    First detection means for detecting whether or not the projector is stationary;
    Second detection means for detecting whether a screen is present in the projection direction of the image;
    A projector for projecting the image when the detection result of the first detection means indicates the stationary state and the detection result of the second detection means indicates that a screen is present;
  2. 　前記第２検出手段は、前記映像の投写方向に存在する物体までの距離を測定し、その測定結果が、スクリーン検出用の条件を満たす場合、スクリーンが存在する旨の検出結果を出力する、請求項１に記載のプロジェクタ。 The second detection means measures a distance to an object existing in the projection direction of the image, and outputs a detection result indicating that a screen exists when the measurement result satisfies a condition for screen detection. Item 14. The projector according to Item 1.
  3. 　前記第２検出手段は、前記スクリーン検出用の条件として、前記測定結果が予め定められた距離範囲に含まれるという条件を用いる、請求項２に記載のプロジェクタ。 The projector according to claim 2, wherein the second detection unit uses a condition that the measurement result is included in a predetermined distance range as the condition for detecting the screen.
  4. 　前記第２検出手段は、前記距離を複数回測定し、前記スクリーン検出用の条件として、前記複数回測定された距離が同じ値であるという条件を用いる、請求項２に記載のプロジェクタ。 The projector according to claim 2, wherein the second detecting means measures the distance a plurality of times, and uses the condition that the distance measured a plurality of times is the same value as the condition for detecting the screen.
  5. 　前記測定結果が前記距離範囲から外れている場合、前記距離範囲内の値のうち前記測定結果に最も近い値と、前記測定結果と、の差を表示する表示手段をさらに含む請求項３に記載のプロジェクタ。 4. The display device according to claim 3, further comprising: a display unit configured to display a difference between the measurement result and a value closest to the measurement result among values in the distance range when the measurement result is out of the distance range. Projector.
  6. 　前記第１検出手段は、前記プロジェクタの電源がオンになると、前記プロジェクタが静止状態であるか否かの検出を開始し、
    　前記第２検出手段は、前記第１検出手段の検出結果が前記静止状態を示すと、前記映像の投写方向にスクリーンが存在するか否かの検出を開始する、請求項１から５のいずれか１項に記載のプロジェクタ。     The first detection means starts detecting whether or not the projector is in a stationary state when the projector is turned on,
    The said 2nd detection means starts the detection whether a screen exists in the projection direction of the said image | video, if the detection result of the said 1st detection means shows the said stationary state. The projector according to item 1.
  7. 　前記第２検出手段は、前記プロジェクタの電源がオンになると、前記映像の投写方向にスクリーンが存在するか否かの検出を開始し、
    　前記第１検出手段は、前記第２検出手段の検出結果がスクリーンは存在することを示すと、前記プロジェクタが静止状態であるか否かの検出を開始する、請求項１から５のいずれか１項に記載のプロジェクタ。     When the projector is turned on, the second detection means starts detecting whether a screen is present in the projection direction of the video,
    The said 1st detection means starts the detection whether the said projector is a stationary state, if the detection result of the said 2nd detection means shows that a screen exists, The any one of Claim 1 to 5 The projector according to item.
  8. 　映像を投写するプロジェクタでの投写制御方法であって、
    　前記プロジェクタが静止状態であるか否かを検出し、
    　前記映像の投写方向にスクリーンが存在するか否かを検出し、
    　前記静止状態を検出し、かつ、スクリーンが存在することを検出した場合、前記映像を投写する、投写制御方法。     A projection control method for a projector that projects an image,
    Detecting whether the projector is stationary,
    Detecting whether a screen is present in the projection direction of the image;
    A projection control method for projecting the image when the stationary state is detected and the presence of a screen is detected.
  9. 　前記スクリーンが存在するか否かを検出することは、前記映像の投写方向に存在する物体までの距離を測定し、その測定結果が、スクリーン検出用の条件を満たす場合、スクリーンが存在する旨の検出結果を出力することを含む、請求項８に記載の投写制御方法。 Detecting whether or not the screen exists means measuring a distance to an object existing in the projection direction of the image, and if the measurement result satisfies a condition for screen detection, it indicates that the screen exists. The projection control method according to claim 8, comprising outputting a detection result.
  10. 　前記スクリーン検出用の条件は、前記測定結果が予め定められた距離範囲に含まれるという条件である、請求項９に記載の投写制御方法。 The projection control method according to claim 9, wherein the condition for detecting the screen is a condition that the measurement result is included in a predetermined distance range.
  11. 　前記距離を複数回測定し、
    　前記スクリーン検出用の条件は、前記複数回測定された距離が同じ値であるという条件である、請求項９に記載の投写制御方法。     Measuring the distance multiple times,
    The projection control method according to claim 9, wherein the condition for detecting the screen is a condition that the distances measured a plurality of times are the same value.
  12. 　前記測定結果が前記距離範囲から外れている場合、前記距離範囲内の値のうち前記測定結果に最も近い値と、前記測定結果と、の差を表示手段に表示することをさらに含む請求項１０に記載の投写制御方法。 11. The display device further includes displaying a difference between a value closest to the measurement result among values within the distance range and the measurement result when the measurement result is out of the distance range. The projection control method described in 1.
  13. 　前記プロジェクタの電源がオンになると、前記プロジェクタが静止状態であるか否かの検出を開始し、
    　前記静止状態が検出されると、前記映像の投写方向にスクリーンが存在するか否かの検出を開始する、請求項８から１２のいずれか１項に記載の投写制御方法。     When the projector is turned on, it starts detecting whether the projector is stationary,
    The projection control method according to any one of claims 8 to 12, wherein when the stationary state is detected, detection of whether or not a screen is present in a projection direction of the video is started.
  14. 　前記プロジェクタの電源がオンになると、前記映像の投写方向にスクリーンが存在するか否かの検出を開始し、
    　スクリーンが存在することが検出されると、前記プロジェクタが静止状態であるか否かの検出を開始する、請求項８から１２のいずれか１項に記載の投写制御方法。     When the projector is turned on, it starts detecting whether there is a screen in the projection direction of the image,
    The projection control method according to claim 8, wherein when it is detected that a screen is present, detection of whether or not the projector is in a stationary state is started.
  15. 　映像を投写する投写手段と、プロジェクタが静止状態であるか否かを検出する第１検出手段と、前記映像の投写方向にスクリーンが存在するか否かを検出する第２検出手段と、を備えたプロジェクタ内のコンピュータに、
    　前記第１検出手段の検出結果が前記静止状態を示し、かつ、前記第２検出手段の検出結果がスクリーンが存在することを示す場合、前記投写手段に前記映像を投写させる映像投写手順を実行させるためのプログラムを記録したコンピュータ読み取り可能な記録媒体。     Projection means for projecting an image; first detection means for detecting whether or not the projector is stationary; and second detection means for detecting whether or not a screen is present in the projection direction of the image. On the computer in the projector
    When the detection result of the first detection means indicates the stationary state and the detection result of the second detection means indicates that a screen is present, the image projection procedure for causing the projection means to project the image is executed. A computer-readable recording medium on which a program for recording is recorded.
  16. 　前記第２検出手段は、前記映像の投写方向に存在する物体までの距離を測定し、その測定結果が、スクリーン検出用の条件を満たす場合、スクリーンが存在する旨の検出結果を出力する、請求項１５に記載の記録媒体。 The second detection means measures a distance to an object existing in the projection direction of the image, and outputs a detection result indicating that a screen exists when the measurement result satisfies a condition for screen detection. Item 16. The recording medium according to Item 15.
PCT/JP2009/061202 2009-06-19 2009-06-19 Projector, projection control method, and recording medium WO2010146704A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014153701A (en) * 2013-02-14 2014-08-25 Seiko Epson Corp Projector and method for controlling projector
JP7322844B2 (en) 2020-09-24 2023-08-08 カシオ計算機株式会社 PROJECTION DEVICE, LIGHTING CONTROL METHOD AND PROGRAM

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005292428A (en) * 2004-03-31 2005-10-20 Sharp Corp Portable terminal
JP2009003281A (en) * 2007-06-22 2009-01-08 Ricoh Co Ltd Portable electronic equipment
JP2009075147A (en) * 2007-09-18 2009-04-09 Seiko Epson Corp Projector, image adjustment method for projector, and program

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005292428A (en) * 2004-03-31 2005-10-20 Sharp Corp Portable terminal
JP2009003281A (en) * 2007-06-22 2009-01-08 Ricoh Co Ltd Portable electronic equipment
JP2009075147A (en) * 2007-09-18 2009-04-09 Seiko Epson Corp Projector, image adjustment method for projector, and program

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014153701A (en) * 2013-02-14 2014-08-25 Seiko Epson Corp Projector and method for controlling projector
JP7322844B2 (en) 2020-09-24 2023-08-08 カシオ計算機株式会社 PROJECTION DEVICE, LIGHTING CONTROL METHOD AND PROGRAM

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