JP2015087575A - Projector and projector control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector and a projector control method capable of efficiently confirming an image to be projected and adjusting an installation position.SOLUTION: A projector 1 for modulating light emitted from a light source device 11 on the basis of image information and projecting the modulated light, includes: a power supply unit 31 that supplies electric power using both a battery 311 and an external power supply; storage means 21 storing setting information necessary for projection; image-signal input means 18 to which image data for projection is input; display means 40 displaying various information; and control means 20 controlling the projector 1 to operate. The control means 20 controls the projector 1 to be driven by the battery 311, controls the electric power not to be supplied to the light source device 11, and controls the display means 40 to display the setting information and/or an image based on the image data if the projector 1 is turned on without supply of the electric power from the external power supply.

Description

  The present invention relates to a projector and a projector control method.

  2. Description of the Related Art Conventionally, projectors that modulate and project light emitted from a light source device according to image information are known. Such a projector can be carried and used where it is used. And when using a projector, it projects by supplying electric power from an external power supply (commercial power supply) via a power cable. Thereafter, the installation position of the projector is adjusted according to the size of the screen or the like as the projection surface, and the image to be projected is confirmed.

  Patent Document 1 discloses a projector that displays an image to be projected on a lens cover in a closed state, so that the image can be confirmed without projecting to the outside.

  Patent Document 2 discloses a projector that holds a battery as a backup power source for a watch.

JP 2011-22235 A JP 2006-243099 A

However, in the projector including the projector of Patent Document 1, normally, in order to confirm the image to be projected, first, as described above, in order to drive the light source device or the like, from the commercial power supply via the power cable. It is necessary to supply power. Further, in order to make it easy for the viewer to see the projected image, it is necessary to adjust the installation position of the projector in accordance with the size of the screen. In any case, it is troublesome to check the image to be projected and adjust the installation position, and there is a problem that it takes time and effort. Moreover, although the projector of patent document 2 is equipped with the liquid crystal display device as a alerting | reporting part, there existed a subject that the image projected cannot be displayed.
Accordingly, there has been a demand for a projector that can efficiently check the image to be projected and adjust the installation position, and a projector control method.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector that modulates and projects light emitted from a light source device based on image information, and supplies power using both a battery and an external power source as power sources. A power source, storage means for storing setting information necessary for projection, image signal input means for inputting image data for projection, display means for displaying various information, and control means for controlling the operation of the projector; When the power is turned on without power supply from an external power source, the control means is driven by a battery, does not supply power to the light source device, and displays an image based on setting information and / or image data on the display means. It is characterized by displaying.

  According to such a projector, when the power is turned on without power supply from an external power source, the control unit is driven by a battery, does not supply power to the light source device, and does not supply power to the display unit. Display an image with data. As a result, even if the power is not supplied from an external power source via a power cable or the like, the setting information and / or the image data is displayed on the display means by the power supply from the battery installed in the main body of the projector. Information and images to be projected can be checked. Therefore, it is possible to efficiently check the setting information and the image to be projected before projecting the image on the screen (during preparation before setting the connection to the external power source).

  Application Example 2 In the projector according to the application example described above, it is preferable that a notification unit that notifies various types of information is provided, and the notification unit notifies the fact as information when power is supplied by a battery.

  According to such a projector, it is possible to notify the user that the current power source (power supply source) is a battery by notifying the power supply by the battery by the notification means.

  Application Example 3 The projector according to the application example described above includes a measurement unit that measures the projection distance to the projection surface, and the storage unit defines the range of the projection distance when projecting with a predetermined image size as setting information. When the power is turned on without power supply from an external power source, the control means is driven by a battery, and the distance data measured by the measurement means and the projection distance range of the projection distance information It is preferable to display and / or notify the comparison result on the display means and / or the notification means.

  According to such a projector, when the power is turned on without power supply from an external power supply, the control means is driven by a battery, and the distance data measured by the measurement means and the projection distance range of the projection distance information And the comparison result is displayed on the display means. Alternatively, the notification means is notified. Thereby, the user can confirm the comparison result and adjust the installation position of the projector. Therefore, it is possible to efficiently adjust the installation position of the projector before projecting an image on the screen (during preparation before setting the connection to the external power source).

  Application Example 4 In the projector according to the application example, the projector includes an input operation unit that instructs the control unit to perform an operation by an input operation, and the control unit detects power supply from an external power source during driving by the battery. When an image for confirming whether or not to project an image is displayed on the display means and an input operation for projecting the image by the input operation means is detected, it is preferable to turn on the light source device and project the image.

  According to such a projector, when power supply from the external power source is detected during driving by the battery, it is possible to easily switch the power supply from the battery to power supply by the external power source and project an image.

  Application Example 5 A projector control method according to this application example is a projector control method for projecting light emitted from a light source device by modulating the light based on image information, and includes both a battery and an external power source. A power supply unit that supplies power as a power source, a storage unit that stores setting information necessary for projection, an image signal input unit that inputs image data for projection, a display unit that displays various information, and an operation of the projector And a control step for detecting power supply from an external power source when the power is turned on, and power from the battery when no power supply from the external power source is detected by the detection step. A display step of performing supply, not supplying power to the light source device, and causing the display means to display an image based on the setting information and / or the image data; It is characterized by providing.

  According to such a projector control method, when the power is turned on, the power supply from the external power source is detected in the detection step, and when the power supply from the external power source is not detected, the power supply from the battery is performed. The power is not supplied to the light source device, and an image based on the setting information and / or image data is displayed on the display means in the display step. This makes it possible to check the setting information and the projected image before projecting the image on the screen.

  [Application Example 6] In the projector control method according to the application example described above, the projector includes a notification unit that notifies various types of information, and when power is supplied from the battery, a notification step of notifying the notification unit of the fact as information is performed. It is preferable to provide.

  According to such a projector control method, it is possible to notify the user that the current power source is a battery by notifying that power is supplied from the battery in the notification step.

  Application Example 7 In the projector control method according to the application example, the storage unit includes, as the setting information, projection distance information for setting a projection distance range when projecting with a predetermined image size, and the battery. In the case of supplying power from the measurement step, the measurement step for measuring the projection distance to the projection surface, the comparison step for comparing the distance data by the measurement step and the projection distance range of the projection distance information, and the comparison step It is preferable to include a comparison display step of displaying the comparison result on the display means and / or notifying on the notification means.

  According to such a projector control method, when power is supplied from the battery, the projection distance to the projection surface is measured in the measurement step, and the distance data in the measurement step and the projection distance information are measured in the comparison step. The range of the projection distance is compared, and in the comparison display step, the comparison result is displayed on the display means and / or notified on the notification means. This makes it possible to efficiently adjust the installation position of the projector before projecting an image on the screen.

It is a figure which shows the use condition of the projector which concerns on embodiment, (a) is the perspective view which looked at the projector from the front, (b) is a figure which shows the state which uses a projector with the electric power by an external power supply, (c) is a battery The figure which shows the state which uses a projector with the drive power by. It is a figure which shows the transition of the operation state of a projector, (a) is a figure which shows a power-off state, (b) is a figure which shows a battery operation state, (c) is a figure which shows AC operation state. The block diagram which shows the circuit structure of a projector. The flowchart which shows operation | movement of a projector.

Hereinafter, embodiments will be described with reference to the drawings.
Embodiment

  FIG. 1 is a diagram illustrating a usage state of the projector 1 according to the present embodiment. FIG. 1A is a perspective view of the projector 1 viewed from the front, and FIG. FIG. 1C is a diagram illustrating a state in which the projector 1 is used, and FIG. 1C is a diagram illustrating a state in which the projector 1 is used with driving power from the battery 311.

  As shown in FIG. 1A, the projector 1 according to the present embodiment is covered with an outer casing 100 having a substantially rectangular parallelepiped shape. An opening 101 is formed in the front surface 100b of the exterior casing 100, and a projection lens 13 that projects an image (image light) forward is installed inside the opening 101. In addition, a window 102 is formed at the end of the front surface 100b, and a distance sensor (not shown) that constitutes the measuring means 15 installed inside the exterior casing 100 is installed inside the window 102. In the present embodiment, the upper surface 100a of the exterior casing 100 is configured by a liquid crystal display device, and includes an input operation unit configured by a display unit 40 that displays various types of information and various input keys that are input by a user. 23 and a notification means 50 configured to notify various types of information are installed.

  As shown in FIGS. 1B and 1C, the projector 1 according to the present embodiment has a specification that operates with an external power source and a battery 311 (see FIG. 3) serving as an internal power source. As shown in FIG. 1B, the projector 1 is connected to a commercial power supply AC (alternating current) power source serving as an external power source by being connected to an outlet 150 via a power cable 110. With this connection, the projector 1 is supplied with power from the AC power source and can project an image (image light) onto the screen SC. Hereinafter, a state in which the projector 1 is operated by the AC power supply is referred to as an AC operation state (AC operation state S3 illustrated in FIG. 2).

  Further, as shown in FIG. 1C, the projector 1 is operated by a battery 311 installed inside the projector 1 when not connected to an AC power source (no power supply from the AC power source). be able to. Hereinafter, a state in which the projector 1 is operated by the battery 311 is referred to as a battery operation state (battery operation state S2 illustrated in FIG. 2).

  When the battery 311 is used as a power source (battery operation state S2), the projector 1 does not supply power from the battery 311 to the light source device 11 (light source control means 25: see FIG. 3), and projects an image. Do not do. Then, the projector 1 causes the display unit 40 installed on the upper surface 100a to display setting information necessary for projection and an image to be projected.

  Further, in the battery operating state S2, the projector 1 displays and notifies the display means 40 and the notifying means 50 as information that the battery operating state S2. In the battery operating state S2, the projector 1 measures the distance D (projection distance) to the screen SC as the projection surface, and compares the measurement data with the projection distance range of the projection distance information 21a (FIG. 3). The result (comparison result) is displayed and notified on the display means 40 and the notification means 50.

  FIG. 1C shows a display image G1 as an example of a display image displayed on the display means 40. Specifically, an image to be projected on the screen SC is displayed as the display image G1, and a message (character string) “battery operating” indicating the battery operating state S2 is displayed.

  Further, as the display image G1, in the present embodiment, two triangular shapes having acute angles in the upward direction and the downward direction are displayed in a relative manner. The triangular portion is a portion where the distance D to the screen SC is measured and the result of comparison with the projection distance information 21a is displayed.

  As a measurement result (comparison result), when it is necessary for the display unit 40 to bring the projector 1 close to the screen SC (move it in the forward direction), as shown in the display image G1, it has a triangular shape with an acute angle upward. The part is blinked and displayed (the triangular part with a sharp downward angle remains lit).

  On the other hand, when it is necessary to move the projector 1 away from the screen SC (move it backward), a sharp triangular part is displayed blinking downward (the acute triangular part remains on). ). Further, when the distance between the projector 1 and the screen SC is appropriate (when the distance D is within the projection distance range defined in the projection distance information 21a), both triangular portions are lit and displayed.

  Moreover, in FIG.1 (c), the alerting | reporting means 50 is shown as an enlarged view. The notification means 50 is configured by an LED, and in the present embodiment, is configured by a round-shaped portion and a portion where two triangular shapes having acute angles in the upward direction and the downward direction are disposed opposite to each other. . And the alerting | reporting means 50 lights up and displays a round shaped part, when it is battery operation state S2.

  Further, the notification means 50 has an acute angle upward when it is necessary to bring the projector 1 closer to the screen SC (move it forward) based on the comparison result between the distance D (projection distance) and the projection distance information 21a. The triangular part blinks. Further, when it is necessary to move the projector 1 away from the screen SC (move backward), a triangular portion having an acute angle in the downward direction is displayed blinking. Further, when the distance between the projector 1 and the screen SC is appropriate, both triangular portions are lit and displayed.

FIG. 2 is a diagram illustrating transition of the operation state of the projector 1, FIG. 2A is a diagram illustrating the power-off state S1, and FIG. 2B is a diagram illustrating the battery operation state S2. 2 (c) is a diagram illustrating an AC operation state S3.
As shown in FIG. 2, the projector 1 has three states of a power-off state S1, a battery operation state S2, and an AC operation state S3.

  When a power-on operation is performed from the power-off state S1 without connection to an AC power source, the state transits to the battery operation state S2. Further, when the power is turned on by connecting to the AC power source from the power off state S1, the state transits to the AC operating state S3. Note that, in the battery operation state S2 and the AC operation state S3, a transition to the power-off state S1 is made by a power-off operation using the power key. In addition, when it is detected that the battery is connected to the AC power source in the battery operation state S2, an AC operation check is performed to determine whether or not the AC operation state S3 is to be changed.

  The AC operation confirmation is displayed on the display means 40 as a display image G2. Specifically, when the message image for confirming the AC operation that is superimposed and displayed as the display image G2 is changed to the AC operation state S3 (image projection is started), the determination key is operated. Transition with. In this embodiment, as a message image for confirming the AC operation, as shown in the display image G2, a character string “Connected to the AC power source. Image projection is started by the ENT key.” Is displayed. The

FIG. 3 is a block diagram illustrating a circuit configuration of the projector 1.
As shown in FIG. 3, the projector 1 includes an image input terminal 6, an image projection unit 10, a measurement unit 15, an OSD processing unit 16, an image signal processing unit 17, an image signal input unit 18, a control unit 20, a storage unit 21, The input operation means 23, the light source control means 25, the power supply terminal 30, the power supply part 31, the display means 40, the alerting | reporting means 50, etc. are comprised. In addition, these circuit blocks are arranged inside or outside the exterior casing 100 of the projector 1.

  The image projection means 10 includes a light source device 11, three liquid crystal light valves 12R, 12G, and 12B, a projection lens 13, a liquid crystal drive means 14, and the like. The image projecting means 10 modulates the light emitted from the light source device 11 with the liquid crystal light valves 12R, 12G, and 12B, and projects the modulated image (image light) from the projection lens 13, thereby the screen SC or the like. Displayed as a projected image on the projection surface.

  The light source device 11 includes a discharge-type light source lamp 11a such as an ultra-high pressure mercury lamp or 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. ing. The light emitted from the light source device 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R) and green, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into light components of each color (G) and blue (B), they are incident on the corresponding liquid crystal light valves 12R, 12G, and 12B.

  The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, and a driving voltage can be applied to the liquid crystal for each pixel.

  When the driving voltage corresponding to the image data input by the liquid crystal driving unit 14 is applied to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source device 11 is modulated by transmitting through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  In the present embodiment, a discharge light source is used as the light source device 11. However, a solid light source may be used as the light source device. As the solid light source, various solid light emitting elements such as a laser light source, an LED, an organic EL (Electro Luminescence) element, and a silicon light emitting element may be used.

  In the present embodiment, the image projection unit 10 exemplifies a transmissive liquid crystal type projection optical system using the three liquid crystal light valves 12R, 12G, and 12B as a light modulation device, but a reflective liquid crystal display method or a micromirror device. You may employ | adopt the projection optical system using the light modulation apparatus of other display systems, such as a system (light switch display system).

  The control unit 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, and operates according to a control program (not shown) stored in the storage unit 21. By doing so, the overall operation of the projector 1 is controlled. The control means 20 functions as a so-called computer together with the storage means 21.

  The storage means 21 is composed of a rewritable nonvolatile memory such as a flash memory or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting information (setting data) that defines the operation conditions of the projector 1, and the like.

  In the present embodiment, the storage unit 21 stores projection distance information 21a. The projection distance information 21a defines the range of the projection distance when projecting with a predetermined image size. The storage means 21 stores a control program for comparing the distance data between the projector 1 and the screen SC measured by the measuring means 15 and the projection distance range defined in the projection distance information 21a.

  The input operation unit 23 includes an operation panel 231 (see FIG. 1) for a user to give various instructions to the projector 1. As described above, the operation panel 231 is provided on the upper surface 100a of the exterior casing 100 of the projector 1 and is configured by a plurality of operation keys.

  The operation keys provided in the input operation means 23 (operation panel 231) include a power key for alternately switching on / off the power, and an input for switching a plurality of image input terminals 6 input to the image signal input means 18. There are a switch key, a menu key for superimposing a setting menu for performing various settings, a cursor key for selecting a setting item from the menu, a determination key, an escape key, and the like.

  When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20. The input operation unit 23 may include a receiving unit (not shown) that receives a signal from a remote controller (not shown) that can be remotely operated. In this case, the remote controller transmits an operation signal such as an infrared ray corresponding to the operation content of the user, and the receiving means receives this and transmits it to the control means 20 as control information.

  The image signal input means 18 receives image information from an external image output device such as a video reproduction device or a PC (personal computer) via a cable and a plurality of image input terminals 6 connecting the cables. The input image information is output to the image signal processing unit 17 based on an instruction from the control unit 20. The image signal input means 18 may be configured to include receiving means (not shown) such as wireless communication and optical communication, and to input an image signal wirelessly from an external device.

  The image signal processing means 17 converts the image information input from the image signal input means 18 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image information is classified into red (R), green (G), and blue (B) color lights, and a plurality of pixels corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. Consists of values. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted through the pixel is defined by the pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (On-Screen Display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing means 16 includes an OSD memory (not shown), and stores OSD image information representing graphics, fonts, and the like for forming an OSD image.

  When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 16 reads necessary OSD image information from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is synthesized with the image information input from the processing means 17. The image information combined with the OSD image information is output to the liquid crystal driving means 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 16 outputs the image information input from the image signal processing unit 17 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the OSD processing unit 16, the liquid crystal light valves 12R, 12G, and 12B form image light corresponding to the image information. The image light is combined by a cross dichroic prism (not shown) and projected from the projection lens 13.

  The light source control unit 25 controls the supply and stop of driving power to the light source device 11 based on an instruction from the control unit 20, and switches between turning on and off the light source device 11.

  The power source unit 31 supplies power to each unit of the projector 1 using a commercial power source (AC (alternating current) power source) as an external power source or a battery 311 as a power source. When an AC power source is used as the power source, power such as AC 100 V is supplied to the power source unit 31 via the power terminal 30. Then, the power supply unit 31 converts the input power (AC power) into predetermined DC power and supplies it to each unit of the projector 1.

  In the present embodiment, the battery 311 uses a rechargeable secondary battery and is installed inside the outer casing 100. When the battery 311 is used as a power source, power is supplied to each unit of the projector 1 as in the case of a commercial power source, but power is not supplied to the light source device 11. Note that the battery 311 may employ a battery of another mode such as a fuel cell.

  The power supply unit 31 includes a power supply detection unit (not shown) that detects whether the power supply cable 110 is connected to the power supply terminal 30, and the power supply detection unit controls the detection result of the connection of the power supply cable 110. Output to means 20. The power supply unit 31 supplies power by switching the power supply (switching the battery 311 to an AC power supply) according to an instruction from the control unit 20. The battery 311 is configured to be rechargeable, and is charged when the projector 1 operates by switching to an AC power source.

  The measuring means 15 measures the distance (projection distance) between the projector 1 and the screen SC as the projection surface. In this embodiment, the measuring means 15 is composed of a distance sensor using infrared rays. The distance data measured by the measuring unit 15 is output to the control unit 20. The measuring means 15 may be constituted by a distance sensor using laser light, ultrasonic waves, or the like other than infrared rays.

  The display means 40 is configured using a liquid crystal display device. In the present embodiment, the display unit 40 displays setting information necessary for projection, an image to be projected, and the like based on an instruction from the control unit 20.

  The notification means 50 is configured using an LED. In the present embodiment, the notification unit 50 notifies the state where the battery 311 is used as a power source (battery operation state S2) and the measurement result of the distance between the projector 1 and the screen SC based on an instruction from the control unit 20. I do. The notification unit 50 also includes an LED (not shown), a buzzer (not shown), and the like that perform predetermined display corresponding to various operation states of the projector 1.

FIG. 4 is a flowchart showing the operation of the projector 1.
As shown in FIG. 4, when the projector 1 is powered on by the power key operation of the input operation means 23 in the power off state S1 (step S100), the process proceeds to step S101.

In step S101, the control unit 20 determines whether there is an input of power (AC power) from an external power source (AC power source) (whether it is connected to the AC power source). If no AC power is input (step S101: N), the process proceeds to step S102. When AC power is input (step S101: Y), the process proceeds to step S110. In step S101, when there is no input of AC power, the control unit 20 starts driving with the battery 311 as a power source. Further, the projector 1 transits to the battery operation state S2.
Note that step S101 corresponds to a detection step of detecting power supply from an external power source.

In step S102, the control unit 20 notifies the battery operating state S2 by the notification unit 50, and proceeds to step S103. Note that the way of notification is the same as the description of the notification by the notification means 50 in FIG.
Step S102 corresponds to a notification step.

  In step S103, the control unit 20 displays the image input from the image signal input unit 18 to the image signal processing unit 17 on the display unit 40 via the OSD processing unit 16, and proceeds to step S104. The image displayed on the display means 40 is the same as the projected image. The projector 1 is connected to an image output device, and displays an image (for example, a display image G1) input from the image output device.

  At the same time, the control unit 20 instructs the OSD processing unit 16 to display a message image indicating that the battery operating state S2 is superimposed on the image displayed on the display unit 40. Based on an instruction from the control unit 20, the OSD processing unit 16 displays a message image (character string “battery in operation” shown in the display image G1 in FIG. 1C) indicating the battery operation state S2 in the OSD memory. Is superimposed on the image input from the image signal processing means 17 and displayed on the display means 40.

In step S103, the user can confirm the projected image before the image is projected on the screen SC by displaying the image projected on the screen SC on the display unit 40.
Note that step S103 corresponds to a display step of causing the display means 40 to display an image based on setting information and / or image data.

In step S104, the control unit 20 instructs the measurement unit 15 to measure the distance D to the screen SC as the projection plane, and proceeds to step S105. The measuring unit 15 measures the distance D to the screen SC based on an instruction from the control unit 20 and outputs the distance D to the control unit 20 as distance data.
Note that step S104 corresponds to a measurement step of measuring the projection distance (distance D) to the projection surface (screen SC).

In step S105, the control unit 20 compares the distance data measured by the measuring unit 15 with the projection distance range defined by the projection distance information 21a, and displays the measurement result (comparison result) on the display unit 40. Specifically, the control means 20 calculates whether or not the measured distance D is within the projection distance range, and compares whether the distance D is larger or smaller than the specified projection distance (projection distance range). Display as a result.
Note that step S105 corresponds to a comparison step of comparing the distance D with the projection distance range of the projection distance information 21a.

  As a comparison result, when the installation position of the projector 1 is away from the screen SC (when the distance D is larger than the specified projection distance), a display for bringing the installation position of the projector 1 closer to the screen SC I do. Further, when the installation position of the projector 1 is approaching the screen SC (when the distance D is small with respect to the specified projection distance), a display for moving the installation position of the projector 1 away from the screen SC is performed. . This is the same as the content described in the description of the display image G1 in FIG. The display of the comparison result is also displayed by the OSD processing unit 16 with the display image of the comparison result superimposed.

In S <b> 105, the control unit 20 notifies the comparison result to the notification unit 50 in addition to displaying the comparison result on the display unit 40. Note that the way of notification is the same as the description of the notification by the notification means 50 in FIG.
Note that step S105 corresponds to a comparison display step of displaying the comparison result on the display means 40 and / or notifying the notification means 50.

  In step S105, the user can set the projector 1 to an appropriate position according to the size of the screen SC before projecting an image on the screen SC based on the comparison result displayed and notified on the display unit 40 and the notification unit 50. It can be.

  In step S106, the control means 20 determines whether or not input of power (AC power) from the AC power source is detected. When the input of AC power is not detected (step S106: N), the process proceeds to step S104. When the input of AC power is detected (step S106: Y), the process proceeds to step S107.

  In step S107, the control unit 20 instructs the OSD processing unit 16 to display a message image on the display unit 40 as a confirmation image indicating that the AC power source is connected (AC power input is detected). Displayed on the image to be superimposed. The OSD processing unit 16 reads out a message image indicating that it is connected to the AC power source from the OSD memory based on an instruction from the control unit 20, superimposes it on the image input from the image signal processing unit 17, and displays the display unit. 40. In this embodiment, as a message image serving as a confirmation image, as shown in the display image G2 in FIG. 2, for example, “Connected to an AC power source. Image projection starts with the ENT key.” A character string is displayed.

  In step S107, when the user who has confirmed the confirmation image displayed on the display unit 40 operates the determination key serving as an input operation for projecting an image, the process proceeds to step S110.

  In step S110, the control unit 20 switches the power source from the battery 311 to an AC power source as an external power source. Then, the control unit 20 instructs the light source control unit 25 with AC power to supply the light source device 11 with predetermined power to turn on the light source device 11, and the process proceeds to step S111. In step S110, the projector 1 transits to the AC operation state S3.

In step S111, the control unit 20 inputs the image data output from the image signal processing unit 17 to the liquid crystal driving unit 14 via the OSD processing unit 16, and drives the liquid crystal light valves 12R, 12G, and 12B. Projection of an image onto the screen SC is started.
Thus, the operation flow ends.

According to the embodiment described above, the following effects can be obtained.
In the projector 1 of the present embodiment, the control unit 20 drives the battery 311 when the power is turned on without supplying power from the external power supply (AC power supply), does not supply power to the light source device 11, and displays the display unit. 40 displays an image based on the image data. Thus, an image to be projected is displayed on the display means 40 by displaying power on the display means 40 by supplying power from the battery 311 installed in the main body of the projector 1 without supplying power from an external power source via a power cable or the like. Can be confirmed. Accordingly, it is possible to efficiently check the projected image before projecting the image onto the screen SC (during preparation before setting the connection to the AC power source).

  In the projector 1 according to the present embodiment, the notification means 50 notifies the user that the power is supplied by the battery 311, so that the user can be notified that the current power supply (power supply source) is the battery 311.

  In the projector 1 according to the present embodiment, the control unit 20 is driven by the battery 311 when the power is turned on without power supply from the external power source, and the distance data measured by the measurement unit 15 and the projection distance information 21a. The range of the projection distance is compared, and the comparison result is displayed on the display means 40. Alternatively, the notification means 50 is notified. Thereby, the user can confirm the comparison result and adjust the installation position of the projector 1. Therefore, it is possible to efficiently adjust the installation position of the projector 1 before projecting an image on the screen SC (during preparation before connection setting to the AC power source).

  In the projector 1 of the present embodiment, when the control unit 20 detects power supply from an external power source during driving by the battery 311, the control unit 20 displays an image for confirming whether to project an image (for example, a display image G <b> 2). When an input operation that is displayed on the display unit 40 and that the image is projected by the input operation unit 23 is detected, the light source device 11 is turned on to project the image. Thus, when power supply from the external power supply is detected during driving by the battery 311, it is possible to easily switch the power supply from the battery 311 to power supply from the external power supply and project an image.

  In the projector 1 of the present embodiment, the image to be projected can be confirmed by the display means 40 before the image is projected on the screen SC, and the installation position of the projector 1 can also be adjusted appropriately. Thereby, the convenience of the projector 1 can be improved.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the invention. A modification will be described below.

(Modification 1)
In the projector 1 according to the embodiment, an image to be projected is displayed on the display unit 40 when power is supplied from the battery 311 (battery operation state S2). However, the present invention is not limited to this, and the setting information of the projector 1 may be displayed in the battery operation state S2.

(Modification 2)
In the projector 1 of the embodiment, the notification unit 50 notifies that the power is supplied by the battery 311, but if the power is switched to the external power supply, the notification means 50 notifies the power supply by the external power supply. May be.

(Modification 3)
In the projector 1 of the embodiment, the distance data measured by the measuring unit 15 is compared with the projection distance range defined in the projection distance information 21a, and the measurement result (comparison) is displayed on the display unit 40 (or the notification unit 50). The display method for displaying (result) can be changed as appropriate.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 11 ... Light source device, 15 ... Measuring means, 18 ... Image signal input means, 20 ... Control means, 21 ... Storage means, 21a ... Projection distance information, 23 ... Input operation means, 25 ... Light source control means, 31 ... power supply unit, 40 ... display means, 50 ... notification means, 311 ... battery, D ... distance, SC ... screen.

Claims (7)

A projector that modulates and projects light emitted from a light source device based on image information,
A power supply unit that supplies power using both a battery and an external power supply as a power supply;
Storage means for storing setting information necessary for projection;
Image signal input means for inputting image data for projection;
Display means for displaying various information;
Control means for controlling the operation of the projector,
When the power is turned on without power supply from the external power supply, the control means is driven by the battery, does not supply power to the light source device, and the setting means and / or the image data is supplied to the display means. A projector characterized by displaying an image according to the above. The projector according to claim 1,
Provided with an informing means for informing various information;
When the power is supplied by the battery, the notification means notifies the information as the information. The projector according to claim 1 or 2, wherein
Equipped with measuring means to measure the projection distance to the projection surface,
The storage means includes, as the setting information, projection distance information that defines a range of the projection distance when projecting with a predetermined image size,
When the power is turned on without power supply from the external power supply, the control means is driven by the battery, and the distance data measured by the measurement means and the range of the projection distance of the projection distance information are obtained. A projector that compares and displays a comparison result on the display unit and / or the notification unit. It is a projector as described in any one of Claims 1-3, Comprising:
An input operation means for instructing the control means to perform an operation by an input operation;
When the control unit detects power supply from the external power source during driving by the battery, the control unit displays an image for confirming whether to project the image on the display unit, and the input operation unit A projector characterized in that when the input operation for projecting an image is detected, the light source device is turned on to project the image. A method for controlling a projector that modulates and projects light emitted from a light source device based on image information,
A power supply unit that supplies power using both a battery and an external power supply, a storage unit that stores setting information necessary for projection, an image signal input unit that inputs image data for projection, and displays various types of information Display means for controlling, and control means for controlling the operation of the projector,
A detection step of detecting power supply from the external power source when the power is turned on;
When power supply from the external power source is not detected by the detection step, power is supplied from the battery, power is not supplied to the light source device, and the setting means and / or the image data is supplied to the display means. And a display step of displaying an image. A projector control method according to claim 5, comprising:
Provided with an informing means for informing various information;
A method for controlling a projector, comprising: a notifying step of notifying the fact that the power is supplied from the battery by the notifying means as the information. A projector control method according to claim 5 or 6, wherein:
The storage means includes, as the setting information, projection distance information for setting a projection distance range when projecting with a predetermined image size,
When supplying power from the battery,
A measurement step for measuring the projection distance to the projection surface;
A comparison step of comparing the distance data obtained by the measurement step with the projection distance range of the projection distance information;
And a comparison display step of displaying the comparison result in the comparison step on the display means and / or notifying on the notification means.

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