JP2008276129A - Camera with projection function, cellular phone with the projection function and portable electronic equipment with the projection function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera with a projection function, a cellular phone with a projection function and portable electronic equipment with a projection function, capable of making projection time longer. <P>SOLUTION: The camera with a projection function is equipped with a projection unit 200 projecting a projection image; an imaging unit 100 for photographing a subject; a battery residual capacity prediction circuit 323 for detecting the residual capacity of a battery; and a battery residual capacity management part 101A for inhibiting predetermined action, based on the detected residual capacity of the battery. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a camera with a projection function, a mobile phone with a projection function, and a portable electronic device with a projection function.

A camera is known in which a projector is incorporated (see, for example, Patent Document 1).
JP 2005-250392 A

  In the camera of Patent Document 1, a projector function is added to the original function as a camera. Further, since the projector consumes more power than the camera, it is desirable to suppress power consumption by functions not related to the projector function when the projector is used.

(1) The portable electronic device with a projection function according to the first aspect of the invention includes a projection unit that projects a projection image, an operation unit that performs a predetermined operation other than projection, a detection unit that detects a remaining battery level, and a detection And a control unit for prohibiting the operation of the operation unit based on the remaining battery level detected by the unit.
(2) The invention according to claim 2 is the portable electronic device with a projection function according to claim 1, wherein the operation unit is a unit that performs a plurality of different operations, and the control unit has a remaining battery level equal to or less than a predetermined value. In this case, a part of the plurality of operations is prohibited.
(3) A third aspect of the present invention is the portable electronic device with a projection function according to the first aspect, wherein the operation unit is a unit that performs a plurality of different operations, and the control unit consumes power in the plurality of operations. The operation is sequentially prohibited in accordance with the remaining battery level.
(4) The invention of claim 4 is the portable electronic device with a projection function according to claim 1, wherein the operation unit is a unit that performs a plurality of different operations, and the control unit consumes power in the plurality of operations. Since the operation is large, the operation is sequentially prohibited every predetermined time.
(5) The invention of claim 5 is a camera with a projection function, and the predetermined operation other than projection has an operation of photographing a subject.
(6) The invention of claim 6 is the camera with a projection function according to claim 5, further comprising a video terminal, and the operation unit has an operation of transmitting and receiving commands and data to and from an external device from the video terminal. The control unit prohibits the operation of the video terminal.
(7) The invention of claim 7 is the camera with a projection function according to claim 5,
A charging device, and the operation unit has an operation of charging the charging device with power for causing the lighting device to emit a flash, and the control unit prohibits charging of the charging device.
(8) The invention according to claim 8 is the camera with a projection function according to claim 5, further comprising a display monitor, the operation unit has an operation of displaying an image on the display monitor, and the control unit is a display monitor The display is prohibited.
(9) The invention according to claim 9 is the camera with a projection function according to claim 5, further comprising a wireless communication device, and the operation unit has an operation of transmitting and receiving data to and from an external device by the wireless communication device. The control unit prohibits data transmission / reception with an external device by the wireless communication device.
(10) The invention of claim 10 is the camera with a projection function according to claim 5, further comprising a wireless communication device, and the operation unit has an operation of transmitting / receiving data to / from an external device by the wireless communication device. The control unit permits transmission / reception of data instructing the operation of the projection unit to / from an external device by the wireless communication device, and prohibits transmission / reception of data other than data instructing the operation of the projection unit. To do.
(11) A portable electronic device with a projection function according to an eleventh aspect of the invention includes a projection unit that projects a projection image, an operation unit that performs a predetermined operation other than projection, a detection unit that detects a remaining battery level, and a detection And a control unit that controls a current supplied to the light source of the projection unit based on the remaining battery level detected by the unit.
(12) The invention of claim 12 is a camera with a projection function, and the predetermined operation other than the projection is an operation of photographing a subject.
(13) The invention of claim 13 is a mobile phone with a projection function, and the predetermined operation other than the projection is an operation of a call function.

  According to the first aspect of the invention, the operation by the operating means is prohibited based on the remaining amount of the battery. According to the invention of claim 11, the current supplied to the light source of the projection means is controlled based on the remaining amount of the battery. Therefore, the projection time can be lengthened.

-First embodiment-
The camera with a projection function according to the first embodiment of the present invention can display a battery remaining amount display when the projection function is operated and a battery remaining amount display when the photographing function is operated.

  A camera 1 with a projection function according to a first embodiment for carrying out the present invention will be described below with reference to the drawings. The camera with a projection function 1 has a photographing function and a projection function, and can display the remaining amount of the battery attached to the main body on a liquid crystal monitor. Fig.1 (a) is the figure which looked at the camera 1 with a projection function by the 1st Embodiment of this invention from the front. In FIG. 1A, on the front surface of the camera 1 with a projection function, a photographing lens 121A constituting the imaging optical system 121, a projection window 221A of the projection optical system 221 and an illumination light window 106A are provided.

  The camera with a projection function 1 is placed on a desk or the like, or placed on a cradle (not shown), and the image is projected by a built-in projection unit 200 (projector) toward a front screen or the like. Project projection information. A release switch 103A is provided on the upper surface of the camera 1 with a projection function. An imaging optical system 121 of the imaging unit 100 (FIG. 2), which will be described later, and a projection optical system 221 of the projection unit 200 are arranged side by side in the vertical direction.

  FIG.1 (b) is the figure which looked at the camera 1 with a projection function by the 1st Embodiment of this invention from back. In FIG. 1B, a display unit 105A of the liquid crystal monitor 105, a photographing / liquid crystal reproduction / projection reproduction switching button 103B, a mode button 103C, a multi-selector switch 103D, and a projection are provided on the back of the camera 1 with a projection function. A start button 103E, a menu button 103F, and a delete button 103G are provided.

  The camera 1 with a projection function can project a still image, a moving image, or the like on the display unit 105 </ b> A of the liquid crystal monitor 105 at the same time as projecting a still image, a moving image, or the like.

  The shooting / liquid crystal playback / projection playback switching button 103B is a button for switching between a shooting mode, a liquid crystal playback mode, and a projection playback mode. The shooting mode is a mode for shooting (when the shooting function is operated), the liquid crystal playback mode is a mode for playing back an image or the like on the LCD monitor 105, and the projection playback mode is for projecting an image or the like. Mode when playing back (when operating the projection function). When the shooting / liquid crystal playback / projection playback switching button 103B is pressed in the shooting mode, the mode is switched to the liquid crystal playback mode. Pressing the shooting / liquid crystal playback / projection playback switching button 103B in the liquid crystal playback mode switches to the projection playback mode. When the shooting / liquid crystal playback / projection playback switching button 103B is pressed in the projection playback mode, the mode is switched to the shooting mode.

  The mode button 103C is a button for displaying a mode menu on the display unit 105A of the liquid crystal monitor 105. For example, when the mode button 103C is pressed in the projection playback mode, a mode menu including a setting mode and a captured image confirmation mode is displayed. By operating the multi selector switch 103D, various modes can be selected from the mode menu displayed on the display unit 105A of the liquid crystal monitor 105. The projection start button 103E is a button for starting projection of a projected image.

  The menu button 103F is a button for displaying a menu corresponding to the mode selected by the mode button 103C. For example, if the menu button 103F is pressed after selecting the setting mode for projection reproduction, a menu for setting the battery remaining amount display, a menu for setting a slide show, a menu for setting the brightness of the projected image, and the like are displayed.

  Here, the slide show means that images recorded in a built-in memory or a memory card are automatically reproduced one by one in order. Further, by operating the multi selector switch 103D, it is possible to switch from the menu for setting the brightness of the projected image to the high brightness mode and the low brightness mode. The high luminance mode is a mode in which the current supplied to the LED light source described later is increased to increase the luminance of the projected image. On the other hand, the low luminance mode is a mode in which a current supplied to an LED light source, which will be described later, is reduced to reduce the luminance of the projected image.

  The delete button 103G is a button for deleting an unnecessary image from the built-in memory or the memory card from images reproduced one frame at a time in the captured image confirmation mode. When the delete button 103G is pressed in the shooting mode, the remaining battery level display in the shooting mode / liquid crystal playback mode displayed on the display unit 105A of the liquid crystal monitor 105 can be switched to the remaining battery level display in the projection playback mode. it can. The remaining battery level display in the shooting mode and the remaining battery level display in the liquid crystal playback mode are common. Hereinafter, the remaining battery level display in the liquid crystal playback mode is also referred to as the remaining battery level display in the photographing mode. The battery remaining amount display in the photographing mode and the battery remaining amount display in the projection reproduction mode will be described later.

FIG. 2 is a block diagram illustrating a configuration of the camera 1 with a projection function. In FIG. 2, the camera with a projection function 1 includes an imaging unit 100, a projection unit 200, a power supply unit 300, a control circuit 101, a memory 102, an operation member 103, a liquid crystal monitor 105, and an external interface (I / F). ) Circuit 104, illumination device 106, photometric device 107, and wireless communication device 108. A detachable memory card 150 loaded in a card slot (not shown) is connected to the control circuit 101.

  Based on the control program, the control circuit 101 performs a predetermined calculation using signals input from each part in the camera, and sends a control signal to each part in the camera. Thereby, the photographing operation, the liquid crystal reproduction operation, and the projection reproduction operation of the camera 1 with a projection function are controlled. The control program is stored in a ROM (not shown) in the control circuit 101. The control circuit 101 incorporates an image processing semiconductor (not shown). The image processing semiconductor performs image processing for displaying a still image or a moving image on the liquid crystal monitor 105 or the projection image.

  The control circuit 101 includes a battery remaining amount management unit 101A and a remaining amount display control unit 101B. The battery remaining amount management unit 101A controls various functions of the camera 1 with a projection function based on the remaining amount data of the battery output from the power supply unit 300, that is, the remaining amount of the battery. The remaining amount display control unit 101B controls the display of the projected image and the remaining amount display of the battery displayed on the display unit 105A of the liquid crystal monitor 105.

  The memory 102 is used as a working memory for the control circuit 101. The operation member 103 includes a release switch 103A, a photographing / liquid crystal reproduction / projection reproduction switching button 103B, a mode button 103C, a multi-selector switch 103D, a projection start button 103E, a menu button 103F, and a delete button 103G. A corresponding operation signal is sent to the control circuit 101. The memory card 150 can write, store, and read data according to instructions from the control circuit 101.

  The liquid crystal monitor 105 displays information such as an image and text according to an instruction from the control circuit 101. The text information is an operation menu, a message, and the like of the camera 1 with a projection function. The external interface circuit 104 sends commands and data to / from external devices (personal computers, televisions, video decks, printers, cradles, etc.) via the input / output terminal connection unit or the wireless communication device 108 according to instructions from the control circuit 101. Send and receive.

  The thus configured camera 1 with a projection function can be used by being connected to the input / output terminal connection unit 400 shown in FIG. The input / output terminal connection unit 400 will be described with reference to FIG. The input / output terminal unit 400 includes a camera mounting portion 401, a USB terminal 402, a video terminal 403, and a DC input terminal 404. As shown in FIG. 3, the camera 1 with a projection function is attached by being inserted into a camera attachment portion 401. A camera connection terminal (not shown) is provided on the bottom surface of the camera mounting portion 401. When the camera 1 with a projection function is attached to the input / output terminal connection unit 400, the camera connection terminal and a terminal (not shown) provided on the bottom surface of the camera 1 with a projection function are fitted. As a result, the camera with a projection function 1 is connected to the USB terminal 402, the video terminal 403, and the DC input terminal 404 provided in the input / output terminal unit 400.

  The USB terminal 402 and the video terminal 403 transmit / receive commands and data to / from an external device. For example, image data of a captured image can be transmitted to a personal computer via the USB terminal 402, and the captured image can be displayed on a television display monitor via the video terminal 403. Further, a battery attached to the camera 1 with a projection function can be charged via the DC input terminal 404.

  A wireless communication apparatus 108 shown in FIG. 2 is an apparatus for connecting to a wireless LAN by wireless means. Thereby, image data of an image taken by the camera with a projection function 1 can be transmitted to an external device such as a personal computer using wireless means, or data can be received from the external device.

  The imaging unit 100 in FIG. 2 includes an imaging optical system 121, an imaging element 122, and an imaging control circuit 123, and images a subject in accordance with an instruction from the control circuit 101. The imaging optical system 121 forms a subject image on the imaging surface of the imaging element 122. As the image sensor 122, a CCD, a CMOS image sensor, or the like is used. The imaging control circuit 123 drives and controls the imaging element 122 according to an instruction from the control circuit 101 and performs predetermined signal processing on the image signal output from the imaging element 122. The image data after the signal processing is recorded in the memory card 150 as an image file in a predetermined format.

  The illumination device 106 illuminates the subject with a predetermined amount of light, for example, flashing when a light emission is instructed from the control circuit 101 during photographing. The illumination light is emitted forward of the camera through the illumination light window 106A. The lighting device 106 includes a charging device (not shown), and the lighting device 106 emits light by the electric power charged in the charging device. In order to be able to emit light immediately after switching to the shooting mode, the charging device is charged even in the projection playback mode and the liquid crystal playback mode (preliminary charging).

  The photometric device 107 calculates the luminance of the subject using the detection signal from the photometric sensor, and sends the luminance information to the control circuit 101. Based on the luminance information, the control circuit 101 performs an exposure calculation in the shooting mode to calculate an exposure value.

  2 includes a projection optical system 221, a liquid crystal panel 222, an LED light source 223, and a projection control circuit 224. The LED light source 223 illuminates the liquid crystal panel 222 with brightness according to the supply current. The liquid crystal panel 222 generates a light image according to the drive signal from the projection control circuit 224. The projection optical system 221 projects a light image emitted from the liquid crystal panel 222. The projection control circuit 224 sends a control signal to the LED light source 223 and the liquid crystal panel 222 according to an instruction from the control circuit 101.

  With reference to FIG. 4, the projection unit 200 built in the camera 1 with a projection function is demonstrated in detail. FIG. 4A is a diagram for explaining the projection unit 200 when the camera 1 with a projection function is viewed from the front. FIG.4 (b) is AA sectional drawing of Fig.4 (a). The projection unit 200 is an L-shaped module.

  The projection unit 200 includes a condensing optical system 225 and a PBS (polarized beam splitter) block 226 in addition to the projection optical system 221, the liquid crystal panel 222, and the LED light source 223. The projection optical system 221 includes a bending prism 221B and a projection lens 221C. A heat sink 227 is provided on the bottom surface of the LED light source 223.

  The projection function by the projection unit 200 having the above configuration will be described. In the projection unit 200 configured as described above, a drive current is supplied to the LED light source 223 via a harness and a pattern (not shown). The LED light source 223 emits light with brightness according to the drive current toward the condensing optical system 225. The condensing optical system 225 converts the LED light into substantially parallel light and enters the PBS block 226.

  The light beam incident on the PBS block 226 passes through the PBS block 226 and illuminates the liquid crystal panel 222. The liquid crystal panel 222 is a reflective liquid crystal panel, which is composed of a plurality of pixels on which red, green, and blue filters are formed, and is driven to generate a color image. The light that passes through the liquid crystal layer of the liquid crystal panel 222 is reflected by the reflection surface of the liquid crystal panel 222, is then emitted from the liquid crystal panel 222, and is incident on the PBS block 226 again. The PBS block 226 reflects (folds) the re-entered light beam by the polarization separation unit 226a and emits the light as projection light toward the upper projection optical system 221. The light beam incident on the projection optical system 221 is bent by the bending prism 221A and emitted to the front of the camera 1 with a projection function.

  2 includes a battery 321, a power supply circuit 322, and a battery remaining amount prediction circuit 323. The battery 321 includes a rechargeable battery, a removable battery pack, a dry battery, or the like. The power supply circuit 322 converts the voltage supplied from the battery 321 into a predetermined voltage. The battery remaining amount prediction circuit 323 predicts the remaining amount of the battery 321 and outputs it to the control circuit 101 as remaining amount data.

  The battery remaining amount prediction circuit 323 will be described with reference to FIG. The battery remaining amount prediction circuit 323 includes a control circuit 521, a voltage / current detection circuit 522, an A / D converter 523, a RAM 524, and a data table ROM 525. The control circuit 521 controls the remaining battery capacity prediction function of the remaining battery capacity prediction circuit 323. The voltage / current detection circuit 522 detects the battery voltage and current consumption of the battery 321. The A / D converter 523 converts the analog data detected by the voltage / current detection circuit 522 into digital data. The RAM 524 temporarily stores voltage data converted into digital data. The data table ROM 525 stores a data table for converting the battery voltage of the battery 321 into the remaining amount of the battery 321.

  The battery remaining amount prediction process of the battery remaining amount prediction circuit 323 will be described with reference to the flowchart of FIG. The processing in FIG. 6 is executed in the control circuit 521.

  In step S <b> 601, the battery voltage of the battery 321 is detected by the voltage / current detection circuit 522. In step S <b> 602, the battery voltage of the battery 321 detected by the voltage / current detection circuit 522 is converted into digital data by the A / D converter 523. In step S603, the voltage value converted into digital data is temporarily stored in the RAM 524. In step S604, the voltage value temporarily stored in the RAM 524 is collated with the data table stored in the data table ROM 525. In step S605, the remaining battery level calculated by collating the data table is output to the control circuit 101 as remaining amount data.

  With reference to FIG. 7, the battery remaining amount display in the photographing mode and the battery remaining amount display in the projection reproduction mode will be described. FIG. 7A is a diagram for explaining the remaining amount display of the battery 321 in the photographing mode, and is a diagram illustrating the relationship between the discharge time and the battery voltage. Battery voltages V1, V2, and V3 are battery voltages when the remaining battery levels are 50%, 30%, and 0%, respectively. Further, the discharge times T1, T2, and T3 are times when the battery voltages become V1, V2, and V3, respectively.

  The battery remaining amount display during the shooting mode setting is displayed by the number of lit segments according to the remaining amount of the battery 321, that is, according to the battery voltage of the battery 321. For example, when the battery voltage of the battery 321 is higher than V1, four segments are displayed on the remaining amount display 71a, and when the battery voltage of the battery 321 is higher than V2 and lower than V1, three segments are lit. It is displayed by the remaining amount display 71b. When the battery voltage of the battery 321 is greater than V3 and less than or equal to V2, two segments are displayed in the remaining amount display 71c. When the voltage of the battery 321 is less than or equal to V3, the remaining amount display in which one segment is lit. 71d.

  Therefore, until the discharge time T1, the battery remaining amount display is the remaining amount display 71a, and when the discharge time T1 is reached, the remaining amount display is switched from the remaining amount display 71a to the remaining amount display 71b. The remaining amount display is switched to the remaining amount display 71c when the discharging time T2 is reached, and is switched to the remaining amount display 71d when the discharging time T3 is reached.

  FIG. 7B is a diagram for explaining the battery remaining amount display in the projection reproduction mode, and is a diagram showing the relationship between the discharge time and the battery voltage. Battery voltages V1, V2, and V3 are battery voltages when the remaining amount of battery 321 is 50%, 30%, and 0%, respectively, as described above. The discharge times T1 ', T2', and T3 'are times when the battery voltages become V1 + h1, V2 + h2, and V3 + h3, respectively. h1, h2, and h3 are predetermined positive voltage values.

  The battery remaining amount display in the projection reproduction mode is also displayed in accordance with the remaining amount of the battery 321, that is, the battery voltage of the battery 321, similarly to the battery remaining amount display in the photographing mode. For example, when the battery voltage of the battery 321 is larger than V1 + h1, the remaining amount display 71a is displayed, and when the battery voltage of the battery 321 is larger than V2 + h2 and equal to or lower than V1 + h1, the remaining amount display 71b is displayed. When the battery voltage of the battery 321 is greater than V3 + h3 and less than or equal to V2 + h2, it is displayed on the remaining amount display 71c, and when the voltage of the battery 321 is less than or equal to V3 + h3, it is displayed on the remaining amount display 71d.

  Thus, the battery remaining amount display in the projection playback mode is switched at a higher battery voltage of the battery 321 than that in the photographing mode and the liquid crystal reproduction mode, that is, at a higher battery remaining amount. This is because the battery 321 is consumed more quickly when the projected image is projected and reproduced than when the image is taken or reproduced on the liquid crystal monitor 105, and the battery 321 is consumed earlier than the user. This is because it is necessary to notify.

  Next, the battery remaining amount display in the first embodiment of the present invention will be described with reference to FIG. FIG. 8A is a diagram for explaining the back of the camera with a projection function 1 in the photographing mode. On the display unit 105A of the liquid crystal monitor 105, a battery remaining amount display 81a in the shooting mode is displayed together with a shooting preparation image (so-called through image) at the time of shooting. The battery remaining amount display 81a is displayed in a shape simulating a dry cell.

  When photographing, it may be desired to check whether the battery 321 has enough capacity to project the photographed image. At this time, the user presses the delete button 103G provided on the back of the camera 1 with a projection function. As a result, as shown in FIG. 8B, the battery remaining amount display 82a in the projection reproduction mode is displayed on the display unit 105A of the liquid crystal monitor 105.

  The battery remaining amount display 82a is also displayed in a shape simulating a dry cell. The battery remaining amount display 82a in the projection reproduction mode is attached with a letter “P” 83a indicating that the battery remaining amount display 82a is in the projection reproduction mode. When the user stops pressing the delete button 103G, the battery remaining amount display 81a in the photographing mode is displayed again on the display unit 105A of the liquid crystal monitor 105.

  Next, the battery remaining amount display process in the first embodiment of the present invention will be described with reference to the flowchart of FIG. The process of FIG. 9 is performed in the remaining amount display control unit 101B of the control circuit 101 by executing a program that starts when the camera 1 with a projection function is turned on.

  In step S901, it is determined whether or not the state of the camera 1 with a projection function is a projection playback mode. If the state of the camera with a projection function 1 is the projection reproduction mode, an affirmative determination is made in step S901, and the process proceeds to step S907. If the state of the camera with projection function 1 is not the projection playback mode, that is, if it is the shooting mode or the liquid crystal playback mode, a negative determination is made in step S901, and the process proceeds to step S902. In step S902, the battery remaining amount display 81a in the photographing mode is displayed on the liquid crystal monitor 105.

  In step S903, it is determined whether or not the delete button 103G has been pressed. If the delete button 103G is pressed, an affirmative determination is made in step S903 and the process proceeds to step S904. If the delete button 103G is not pressed, the process directly returns. In step S904, the battery remaining amount display 82a in the projection reproduction mode is displayed on the liquid crystal monitor 105.

  In step S905, it is determined whether or not the delete button 103G has been pressed. If the delete button 103G is pressed, step S905 is repeated. If the delete button 103G is not pressed, a negative determination is made in step S905, and the process proceeds to step S906. In step S906, the battery remaining amount display 81a in the photographing mode is displayed on the liquid crystal monitor 105. Then return.

  In step S907, the battery remaining amount display 82a in the projection reproduction mode is superimposed on the projection image projected from the projection unit 200. Then return.

According to the first embodiment described above, the following operational effects can be obtained.
(1) The battery remaining amount display 82a in the projection reproduction mode is displayed in a mode different from the battery remaining amount display 81a in the photographing mode. Therefore, the remaining amount of the battery 321 in the projection playback mode can be easily grasped.

(2) By pressing the delete button 103G during the shooting mode setting, the display can be switched from the battery remaining amount display 81a in the shooting mode to the remaining amount display 82a in the projection playback mode. Therefore, it is possible to determine whether or not the capacity of the battery 321 that can project the captured image remains after the capturing without switching to the projection playback mode.

(3) A battery remaining amount (battery voltage) that is a reference when the battery remaining amount display 82a in the projection reproduction mode is changed stepwise, and a reference when the battery remaining amount display 81a in the photographing mode is changed stepwise. The value was higher than the remaining battery level (battery voltage). Thereby, in the projection reproduction mode in which the battery power consumption is larger than that in the photographing mode, the battery 321 can be replaced or the battery 321 can be charged at an appropriate timing.

(4) In the battery remaining amount display 82a in the projection reproduction mode, a character “P” 83a indicating the projection reproduction mode is added, so that the display mode of the battery remaining amount display 81a in the photographing mode is different. Therefore, it is possible to easily recognize whether or not the displayed remaining amount display is the remaining amount display 82a in the projection reproduction mode.

The above first embodiment can be modified as follows.
(1) The battery remaining amount displays 81 a and 82 a are displayed based on the remaining amount of the battery 321 predicted from the battery voltage of the battery 321. However, the battery remaining amount displays 81 a and 82 a are not limited to those predicted from the battery voltage of the battery 321 as long as they are displayed according to the remaining amount of the battery 321.

  For example, when a microcomputer is built in the battery 321 and information on the remaining amount of the battery 321 is output from the battery 321 itself, the remaining battery amount displays 81a and 82a are displayed based on the information on the remaining battery amount. You may do it. Further, the remaining amount of the battery 321 may be predicted by integrating the discharge current of the battery 321, and the remaining battery amount displays 81a and 82a may be displayed.

(2) In the projection reproduction mode remaining amount display 82a, a letter “P” 83a indicating the projection reproduction mode is added, thereby changing the display mode of the projection reproduction mode remaining amount display 82a to the battery remaining amount display in the photographing mode. The display mode is different from that of 81a. However, if the display mode of the remaining battery level display 82a in the projection playback mode can be different from the display mode of the remaining battery level display 81a in the shooting mode, it is determined that the projection playback mode is in the remaining playback level display 82a in the projection playback mode. It is not limited to attaching the character 83a to show.

  For example, as shown in FIG. 10A, the display mode of the remaining battery level display 82b in the projection playback mode is set by attaching an icon 83b indicating the projection playback mode in the remaining battery level display 82b in the projection playback mode. You may make it differ from the display mode of the battery residual amount display 81a of imaging | photography mode. Further, as shown in FIG. 10B, the display color (for example, red) of the battery remaining amount display 82c in the projection playback mode is different from the display color (for example, blue) of the battery remaining amount display 81a in the photographing mode. By doing so, the display mode of the remaining battery level display 82a in the projection playback mode may be different from the display mode of the remaining battery level display 81c in the shooting mode.

  As shown in FIG. 11 (a), the letter “P” 83d is attached to the battery remaining amount display 82d in the projection reproduction mode, and the shape of the dry battery of the battery remaining amount display 82d in the projection reproduction mode is similar to that of “P”. The display mode of the remaining amount display 82d in the projection reproduction mode may be made different from the display mode of the remaining battery level display 81a in the shooting mode by further enclosing the character 83d with a shape imitating a dry battery.

  Further, as shown in FIG. 11 (b), an icon 83e is attached to the battery remaining amount display 82e in the projection reproduction mode, and a shape imitating the dry battery of the battery remaining amount display 82e in the projection reproduction mode and the icon 83e are further replaced with a dry battery. The display mode of the remaining amount display 82e in the projection reproduction mode may be different from the display mode of the remaining battery level display 81a in the shooting mode.

  As shown in FIG. 12 (a), in the battery remaining amount display 82f in the projection reproduction mode, the shape imitating the dry battery of the battery remaining amount display 82f in the projection reproduction mode is further surrounded by the shape imitating the lamp. The display mode of the remaining battery level display 82f in the playback mode may be different from the display mode of the remaining battery level display 81a in the shooting mode. In this case, when the mode is switched to the projection playback mode, it is obvious that the remaining battery level display is in the projection playback mode. Therefore, as shown in FIG. The shape imitating is deleted.

  As shown in FIG. 13A, the shape of the battery remaining amount display 82g in the projection reproduction mode is changed from a shape imitating a dry cell to a shape imitating a lamp, that is, the shape of the battery remaining amount display is changed. Accordingly, the display mode of the battery remaining amount display 82g in the projection reproduction mode may be different from the display mode of the battery remaining amount display 81a in the photographing mode. In the battery remaining amount display 82g in the projection reproduction mode, the battery remaining amount is displayed by the number of lighting of the bar representing the light from the lamp.

  Further, as shown in FIG. 13B, instead of the battery remaining amount display 82a in the projection reproduction mode, a projectable time 84 based on the remaining amount of the battery 321 may be displayed. The projectable time can be calculated by dividing the remaining battery level by the battery current consumption at the time of projection. Since the user can directly know the projectable time, it is not necessary to predict the projectable time from the battery remaining amount display in the projection playback mode, which is convenient.

-Second Embodiment-
The camera with a projection function 1 according to the second embodiment of the present invention is configured to simultaneously display the remaining battery level in the projection playback mode and the remaining battery level in the shooting mode.

  The configuration of the camera with a projection function of the second embodiment is the same as that of the first embodiment (see FIGS. 1 to 6). The remaining battery level display in the shooting mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  Next, the battery remaining amount display in the 2nd Embodiment of this invention is demonstrated with reference to FIG. FIG. 14 is a diagram for explaining the back of the camera 1 with a projection function in the shooting mode. On the display unit 105A of the liquid crystal monitor 105, a battery remaining amount display 141a in which a battery remaining amount display 142a in the projection reproduction mode and a battery remaining amount display 143a in the photographing mode are collectively displayed is displayed together with the through image. The battery remaining charge collective display 141a is displayed in a shape simulating a dry cell.

  In order to distinguish between the remaining battery level display 142a in the projection playback mode and the remaining battery level display 143a in the shooting mode, the battery remaining level display 142a in the projection playback mode has a character “P” 144a. Is attached.

  On the other hand, a letter “C” 145a is added to the battery remaining amount display 143a in the photographing mode. Thereby, the user can know whether or not the battery 321 has sufficient capacity to project the captured image in the capturing mode.

  In the projection reproduction mode, the battery remaining amount collective display 141a is superimposed on the projected image. As a result, the user can recognize whether or not the battery 321 has sufficient capacity for taking a large number of images during projection.

  Next, the battery remaining amount display processing in the second embodiment of the present invention will be described with reference to the flowchart of FIG. The process of FIG. 15 is performed in the remaining amount display control unit 101B of the control circuit 101 by executing a program that starts when the camera 1 with a projection function is turned on.

  In step S1501, the remaining battery level data of the battery 321 is acquired from the remaining battery level prediction circuit 323. In step S1502, the number of segments to be displayed on the battery remaining amount display 142a in the projection reproduction mode is determined based on the remaining amount data of the battery 321. In step S1503, the number of segments to be displayed on the battery remaining amount display 143a in the photographing mode is determined based on the remaining amount data of the battery 321. As in the first embodiment, the remaining amount of the battery 321 serving as a reference for the number of segments in the battery remaining amount display 142a in the projection playback mode is larger than that in the remaining battery amount display 143a in the shooting mode. .

  In step S1504, an image of the battery remaining amount collective display 141a to be displayed to display the battery remaining amount display 142a in the projection reproduction mode and the battery remaining amount display 143a in the photographing mode is generated. In step S1505, it is determined whether or not the state of the camera with a projection function 1 is the projection playback mode. If the state of the camera 1 with the projection function is the projection reproduction mode, an affirmative determination is made in step S1505, and the process proceeds to step S1506. If the state of the camera with a projection function 1 is not the projection playback mode, that is, if it is the shooting mode or the liquid crystal playback mode, a negative determination is made in step S1505, and the process proceeds to step S1507.

  In step S1506, the battery remaining amount collective display 141a is superimposed on the projection image projected from the projection unit 200. Then return.

  In step S1507, the battery remaining amount collective display 141a in the photographing mode is displayed on the liquid crystal monitor 105. Then return.

According to the second embodiment described above, the following operational effects can be obtained.
(1) The battery remaining amount display 142a in the projection reproduction mode and the battery remaining amount display 143a in the photographing mode are simultaneously displayed on the liquid crystal monitor 105 or the projected image. Thus, regardless of the shooting mode, the liquid crystal playback mode, and the projection playback mode, the user can recognize the remaining battery level of the projection playback mode and the remaining battery level of the shooting mode, and correctly grasp the remaining battery level of the battery 321. it can.

(2) The remaining amount of the battery 321 serving as a reference for the number of segments in the battery remaining amount display 142a in the projection playback mode is made higher than that in the battery remaining amount display 143a in the shooting mode. Thereby, in the projection reproduction mode in which the battery power consumption is larger than that in the shooting mode, the battery 321 can be replaced or the battery 321 can be charged at an appropriate timing.

(3) Displaying the remaining amount in the projection reproduction mode by adding the letter “P” 144a in the battery remaining amount display 142a in the projection reproduction mode and attaching the character “C” 145a in the remaining battery amount display 143a in the shooting mode. The display mode of 142a is different from the display mode of the remaining battery level display 143a in the shooting mode. Therefore, it is possible to distinguish which of the two battery remaining amount displays 142a and 143a displayed on the battery remaining amount collective display 141a is in the projection reproduction mode and which is in the photographing mode.

The above second embodiment can be modified as follows.
(1) The battery remaining amount collective display 141a is displayed based on the remaining amount of the battery 321 predicted from the voltage of the battery 321 as in the first embodiment. However, the battery remaining amount collective display 141 a is not limited to the one predicted from the battery voltage of the battery 321 as long as it is displayed according to the remaining amount of the battery 321.

  For example, as in the first embodiment, when the microcomputer has a built-in battery 321 and information on the remaining amount of the battery 321 is output from the battery 321 itself, based on the information on the remaining amount of the battery 321. The battery remaining amount collective display 141a may be displayed. Alternatively, the discharge current of the battery 321 may be integrated to predict the remaining amount of the battery 321 and the battery remaining amount collective display 141a may be displayed.

(2) Projection reproduction on the battery remaining charge collective display 141a is made by attaching the letter “P” 144a to the remaining amount display 142a in the projection reproduction mode and attaching the character “C” 145a to the remaining amount display 143a in the shooting mode. The display mode of the mode remaining amount display 142a is different from the display mode of the remaining battery level display 143a in the shooting mode. However, the present invention is not limited to the second embodiment as long as the display mode of the remaining amount display 142a in the projection reproduction mode in the battery remaining amount display 141a can be different from the display mode of the battery remaining amount display 143a in the shooting mode.

  For example, as shown in FIG. 16, in the remaining amount display 142b in the projection playback mode and the remaining amount display 143b in the shooting mode, an icon 144b indicating the projection playback mode and an icon 145b indicating the shooting mode are attached. The display mode of the remaining battery level display 142a in the projection playback mode in the battery remaining level batch display 141b may be different from the display mode of the remaining battery level display 143a in the shooting mode.

  As shown in FIG. 17A, the remaining amount display 142c in the projection reproduction mode is displayed in the shape of an electric lamp, and the remaining amount display 143c in the shooting mode is displayed in the shape of a dry battery, that is, by changing the shape. The display mode of the remaining battery level display 142c in the projection playback mode in the battery remaining level batch display 141c may be different from the display mode of the remaining battery level display 143c in the shooting mode. In the remaining amount display 142c in the projection reproduction mode, the remaining amount of battery is displayed by the number of illuminated bars representing light from the electric light.

  Also, as shown in FIG. 17B, a partition line is displayed between each segment of the shooting mode remaining amount display 143d, and the partition line is used as a projection reproduction mode remaining amount display 142d. The display mode of the remaining amount display 142d in the projection playback mode in the collective display 141d may be different from the display mode of the remaining battery level display 143d in the shooting mode. In the remaining capacity display 142d in the projection reproduction mode, the remaining battery capacity is displayed by the number of lit division lines.

(3) By displaying two battery remaining amount displays 142a and 143a in one battery remaining amount display 141a, a battery remaining amount display 142a in the projection reproduction mode and a battery remaining amount display 143a in the photographing mode are displayed. displayed. However, the battery remaining amount display in the projection playback mode and the battery remaining amount display in the photographing mode are displayed by separately displaying two battery remaining amount displays on the display unit 105A of the liquid crystal monitor 105 or a part of the projection image. You may make it do.

  For example, in FIG. 18A, the battery remaining amount display 82i in the projection reproduction mode and the battery remaining amount display 81i in the photographing mode are displayed on the display unit 105A of the liquid crystal monitor 105. In order to distinguish between the remaining battery level display 82i in the projection playback mode and the remaining battery level display 81i in the shooting mode, a bar is displayed above the segment of the remaining battery level display 82i in the projection playback mode. A dot is displayed above the segment of the battery remaining amount display 81i.

  Also, in FIG. 18B, a battery remaining amount display 82j in the projection reproduction mode and a battery remaining amount display 81j in the photographing mode are displayed on the display unit 105A of the liquid crystal monitor 105. In order to distinguish between the remaining battery level display 82j in the projection playback mode and the remaining battery level display 81j in the shooting mode, the display color (for example, red) of the remaining battery level display 82j in the projection playback mode and the battery in the shooting mode are displayed. The display color (for example, blue) of the remaining amount display 81j may be different.

(4) By displaying the two battery remaining amount displays 142a and 143a on the display unit 105A of one liquid crystal monitor 105 or a part of one projected image, the battery remaining amount display 142a in the projection reproduction mode and the shooting mode are displayed. A battery remaining amount display 143a is displayed. However, as shown in FIG. 19, in the projection playback mode, playback by projection and playback by the liquid crystal monitor 105 are performed at the same time. The projection remaining image 82a in the projection playback mode is displayed on the projection image 180 by projection, and the liquid crystal The display unit 105A of the monitor 105 may display the remaining battery level display 81a in the projection playback mode and the remaining battery level display 81a in the shooting mode by displaying the remaining battery level display 81a in the shooting mode.

  As shown in FIG. 20, when the remaining battery level display 82g in the projection reproduction mode is superimposed on the projected image 180 by projection and the remaining battery level display 81a in the photographing mode is displayed on the display unit 105A of the liquid crystal monitor 105, projection reproduction is performed. The shape of the battery remaining amount display may be changed so that the battery remaining amount display 82g in the mode is in the shape of a light bulb and the battery remaining amount display 81a in the shooting mode is in the shape of a dry battery.

  As shown in FIG. 21, in the projection reproduction mode, reproduction by projection and reproduction by the liquid crystal monitor 105 are performed simultaneously, and the battery remaining amount display 82a in the projection reproduction mode is superimposed on the projection image 180 by projection, and the liquid crystal monitor 105 is displayed. The display unit 105A displays a battery remaining amount display 142a in the projection reproduction mode and a shooting mode battery remaining amount display 141a displaying the battery remaining amount display in the projection reproduction mode and the battery remaining amount display in the photographing mode. The battery remaining amount display 143a may be displayed.

(5) The number of segments in the battery remaining amount display 142a in the projection playback mode is the same as the number of segments in the battery remaining amount display 143a in the shooting mode. The number may differ from the number of segments in the remaining battery level display 143a in the shooting mode.

  For example, as shown in FIG. 22A, in the battery remaining amount display 141d, the number (3) of segments in the battery remaining amount display 142d in the projection playback mode is set to the number of segments in the battery remaining amount display 143a in the shooting mode. You may make it reduce compared with (4).

  Also, as shown in FIG. 22B, in the battery remaining amount display 141e, the number of segments (12) in the battery remaining amount display 142e in the projection playback mode is set to the number of segments in the battery remaining amount display 143a in the shooting mode. You may make it increase compared with (4). The display accuracy of the battery remaining amount display 142e in the projection reproduction mode can be changed according to the user's preference, which is convenient.

  For example, when the battery 321 is replaced or charged when the remaining amount of the battery 321 is sufficient, the number of segments of the remaining amount display 142d in the projection playback mode may be reduced. However, when the battery 321 is replaced or charged when the battery 321 is almost exhausted, the number of segments of the remaining amount display 142e in the projection playback mode is increased to improve the display accuracy of the battery remaining amount display. There is a need.

-Third embodiment-
In the camera with a projection function 1 according to the third embodiment of the present invention, when the shooting function is operated, the remaining capacity of the battery 321 decreases, and the projection operation is impossible when the projection operation is impossible. Is notified to the user.

  The configuration of the camera 1 with a projection function of the third embodiment is the same as that of the first embodiment (see FIGS. 1 to 6). The remaining battery level display in the shooting mode and the liquid crystal playback mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  Next, projection function notification in the shooting mode according to the third embodiment of the present invention will be described with reference to FIG. FIGS. 23A to 23C are diagrams for explaining the back of the camera with a projection function 1 in the photographing mode. On the display unit 105A of the liquid crystal monitor 105, a battery remaining amount display 81a in the photographing mode is displayed together with a through image.

  Since the main function of the camera 1 with a projection function is a photographing function, it is not preferable that the projection function exhausts the battery 321 and cannot photograph. Therefore, when the remaining amount of the battery 321 is equal to or less than a predetermined value, projection is disabled. Here, the predetermined value is a capacity of a battery that the camera with a projection function 1 can use in a shooting mode for a predetermined time.

  When the remaining amount of the battery 321 is larger than the predetermined value and the projection operation is possible, as shown in FIG. 23A, a projectable mark in which the letter “P” is displayed below the remaining battery amount display 81a. 231a is displayed. On the other hand, when the remaining amount of the battery 321 is less than the predetermined value and the projection operation is impossible, as shown in FIG. 23B or FIG. Unprojectable marks 232a and 233a in which “P” is overwritten with “slash” are displayed. Thereby, the user can recognize whether or not the capacity of the battery 321 necessary for projecting the photographed image remains when photographing.

  Next, projection function notification processing in the shooting mode according to the third embodiment of the present invention will be described with reference to the flowchart of FIG. The processing in FIG. 24 is performed in the remaining amount display control unit 101B of the control circuit 101 by executing a program that starts when the camera 1 with a projection function is turned on.

  In step S2401, it is determined whether or not the state of the camera 1 with a projection function is a projection playback mode. If the state of the camera with a projection function 1 is the projection reproduction mode, an affirmative determination is made in step S2401 and the process proceeds to step S2408. If the state of the camera with a projection function 1 is not the projection playback mode, that is, if it is the shooting mode or the liquid crystal playback mode, a negative determination is made in step S2401, and the process proceeds to step S2402. In step S2402, the remaining battery level data of the battery 321 is acquired from the remaining battery level prediction circuit 323. In step S2403, the number of segments to be displayed on the battery remaining amount display 81a in the photographing mode is determined based on the remaining amount data of the battery 321. In step S2404, the battery remaining amount display 81a in the photographing mode is displayed on the liquid crystal monitor 105.

  In step S2405, it is determined whether the remaining amount of the battery 321 is equal to or less than a predetermined value based on the remaining amount data of the battery 321. If the remaining amount of the battery 321 is less than or equal to the predetermined value, an affirmative determination is made in step S2405 and the process proceeds to step S2406. If the remaining amount of the battery 321 is greater than the predetermined value, a negative determination is made in step S2405 and the process proceeds to step S2407. In step S2406, the projectable mark 231a is displayed on the liquid crystal monitor 105. Then return. In step S2407, the projection impossible marks 232a and 233a are displayed on the liquid crystal monitor 105. Then return.

  In step S2408, the remaining battery level data of the battery 321 is acquired from the remaining battery level prediction circuit 323. In step S2409, the number of segments to be displayed on the battery remaining amount display 82a in the projection playback mode is determined based on the remaining amount data of the battery 321. In step S2410, the battery remaining amount display 82a is superimposed on the projection image projected from the projection unit 200. Then return.

According to the third embodiment described above, the following operational effects can be obtained.
(1) In the shooting mode, when the remaining battery level is greater than the predetermined value and the projection operation is possible, the projectable mark 231a is displayed, and the remaining battery level is equal to or lower than the predetermined value, and the projection operation is impossible. In this case, the projection impossible marks 232a and 233a are displayed. Therefore, it is possible to prevent the user from using up the battery 321 in the projection playback mode and being unable to shoot. In addition, the user can recognize whether or not the photographed image can be projected while photographing, and the convenience of the camera 1 with the projection function is improved.

(2) When the remaining battery capacity is equal to or less than a predetermined battery capacity, the projection unit 200 is prevented from projecting. Therefore, it is possible to prevent the camera from being unable to take a picture by switching to the projection reproduction mode and performing projection even though the battery capacity is small.

(3) The battery remaining amount display 81a is displayed together with the projectable mark 231a and the unprojectable marks 232a and 233a. Therefore, the battery remaining amount can be grasped together with whether or not the projection operation is possible, and the convenience of the camera 1 with the projection function is improved.

The above third embodiment can be modified as follows.
(1) In the shooting mode, when the battery remaining amount is larger than the predetermined value and the projection operation is permitted, the projectable mark 231a is displayed, and when the battery remaining amount is less than the predetermined value and the projection operation is prohibited, Neither the projection possible mark 231a nor the projection impossible mark 232a, 233a may be displayed.

  Also, in the shooting mode, even when the remaining battery level is greater than the predetermined value and the projection operation is permitted, the projection possible mark 231a is not displayed, the remaining battery level is less than the predetermined value, and the projection operation is prohibited. The projection impossible marks 232a and 233a may be displayed. Even in this way, the user can recognize whether or not the photographed image can be projected while photographing, and the convenience of the camera 1 with the projection function is improved.

(2) Although the projectable mark 231a is represented by characters, the projectable mark 231b may be displayed by an icon as shown in FIG. Similarly, the projection impossible marks 232b and 233b may be displayed as icons.

(3) By displaying the projectable mark 231a on the liquid crystal panel 105, the user is informed that the operation of the projection function is possible, and by displaying the unprojectable marks 232a and 233a on the liquid crystal panel 105, the projection is performed. The user is notified that the function is not operational. However, a dividing line may be provided between battery display segments, and the user may be notified of whether or not the projection function can be operated depending on whether or not the remaining battery level is greater than the dividing line.

  For example, as shown in FIG. 26A, separation lines 261a and 261b are provided between segments of the remaining battery level display 81k in the photographing mode. The reason why the two separation lines 261a and 261b exist is to allow the user to select whether to increase or decrease the remaining amount of the battery 321 for ensuring the operation of the photographing function. The user can select one of the separation lines 261a and 261b by a predetermined operation of the operation member 103.

  For example, when the user selects the separation line 261b, the user is notified as to whether or not the projection function can be operated as follows. As shown in FIG. 26 (b), when the remaining battery level is greater than the dividing line 261b, that is, when the segment that is lit remains on the left side of the dividing line 261b, the projection function can be operated. However, as shown in FIG. 26C, when the remaining battery level is lower than the dividing line 261b, that is, when the lit segment does not remain on the left side of the dividing line 261b, the projection function cannot be operated. become.

  As shown in FIGS. 27A and 27B, the battery remaining amount display 81l in the photographing mode may display the remaining amount of the battery 321 by the length of one bar 262. As shown in FIG. 27 (a), when the length of the bar 262 is longer than the dividing line 261c, the projection function can be operated assuming that the remaining battery capacity is sufficient for operating the photographing function. . However, as shown in FIG. 27B, when the length of the bar 262 is shorter than the dividing line 261c, it is impossible to operate the projection function because the remaining battery capacity is not sufficient to operate the shooting function. become. The position of the dividing line 261c is movable in the left-right direction by the operation of the operation member 103 by the user, and the remaining battery level for ensuring the operation of the photographing function can be adjusted.

(4) As shown in FIG. 28 (a), the remaining battery level displays 281a and 281b of the two shooting modes are displayed, and one of the remaining battery level displays 281a is used for notifying that the projection function can be operated. The user may be notified of whether the projection function can be operated. As shown in FIG. 28B, among the segments of the battery remaining amount display 281a, the segment corresponding to the remaining amount of the battery 321 necessary for ensuring the operation of the photographing function is previously turned off, that is, displayed as empty. deep. As a result, when the remaining battery level reaches the remaining battery level necessary to ensure the operation of the photographing function, as shown in FIG. The amount display 281a is displayed as if all the batteries are empty and the remaining battery level is exhausted. Thereby, the user can recognize that the operation of the projection function has become impossible.

(5) The present invention is not limited to the third embodiment as long as it displays at least one of projection in the projection reproduction mode and projection in the projection reproduction mode.

-Fourth Embodiment-
The camera with a projection function 1 according to the fourth embodiment of the present invention switches to the shooting mode when the remaining battery level becomes low and the projection operation becomes impossible in the projection playback mode.

  The configuration of the camera 1 with a projection function of the fourth embodiment is the same as that of the first embodiment (see FIGS. 1 to 6). The remaining battery level display in the shooting mode and the liquid crystal playback mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  Next, automatic switching between the projection reproduction mode and the photographing mode in the fourth embodiment of the present invention will be described with reference to FIGS. 29 and 30. FIG. The following description assumes that a slide show is being executed in the projection playback mode.

  Since the main function of the camera 1 with the projection function is the photographing function, it is not preferable that the battery is used up by the projection function and the photographing cannot be performed. Therefore, in the projection playback mode, when the remaining amount of the battery 321 falls below a predetermined value, the camera with a projection function 1 switches from the projection playback mode to the shooting mode. Here, the predetermined value is a battery capacity that allows the camera with a projection function 1 to be used in a shooting mode for a predetermined time.

  When the remaining battery level falls below the specified value, the slide show stops, and as shown in FIG. 29 (a), the display unit 105A of the LCD monitor 105 displays “The battery level is low and the projection playback mode is terminated. Message 291 is displayed. A similar message 292 is also displayed on the projected image 180 from the projection unit 200. Then, the slide show is interrupted, and the camera with projection function 1 switches from the projection playback mode to the shooting mode. When the mode is switched to the shooting mode, as shown in FIG. 29B, a message 293 “Switched to the shooting mode” is displayed on the display unit 105A of the liquid crystal monitor 105.

  When the battery 321 is charged or replaced and the remaining battery capacity exceeds a predetermined value, the camera with a projection function 1 switches from the shooting mode to the projection playback mode. Then, as shown in FIG. 30, a projection image 180 when the projection reproduction mode is interrupted is projected, and a message 294 “projection reproduction mode is resumed” is displayed on the projection image 180. In addition, an image when the projection reproduction mode is interrupted is displayed on the display unit 105A of the liquid crystal monitor 105, and a message 295 “Restart projection reproduction mode” is displayed. Then, the slide show is started from the projection image 180 from the time of interruption. Even when the camera 1 with a projection function is connected to the input / output terminal connection unit 400 shown in FIG. 3 and power is supplied from the DC input / output terminal 404 to the camera 1 with a projection function, the shooting mode is similarly changed to the projection playback mode. Switch to

  Next, automatic switching processing between the projection reproduction mode and the shooting mode in the shooting mode according to the fourth embodiment of the present invention will be described with reference to the flowchart of FIG. The process of FIG. 24 is performed in the remaining battery charge management unit 101A of the control circuit 101 by executing a program that starts when the camera 1 with a projection function is turned on.

  In step S <b> 3101, it is determined whether the remaining battery level is equal to or less than a predetermined value based on the remaining battery level data of the battery 321 acquired from the remaining battery level prediction circuit 323. If the remaining battery level is equal to or less than the predetermined value, an affirmative determination is made in step S3101 and the process proceeds to step S3102. If the remaining battery level is greater than the predetermined value, a negative determination is made in step S3101 and the process proceeds to step S3108. In step S3102, it is determined whether or not the state of the camera 1 with a projection function is the projection playback mode. If the state of the camera 1 with the projection function is the projection playback mode, an affirmative determination is made in step S3102 and the process proceeds to step S3103. If the camera with projection function 1 is not in the projection playback mode, that is, if it is in the shooting mode or the liquid crystal playback mode, a negative determination is made in step S3102 and the routine returns.

  In step S3103, the brightness and amount of light when the projection image is projected, the information of the image (frame) projected when the projection playback mode is interrupted, the playback time of the video that has been played back, and the like are displayed. Information is stored in the memory 102. In step S <b> 3104, messages 291 and 292 are displayed on the liquid crystal monitor 105 and the projection image projected from the projection unit 200, “Projection playback mode is terminated because the remaining battery level is low”.

  In step S3105, the state of the camera 1 with a projection function is switched from the projection playback mode to the shooting mode. In step S3106, the fact that the mode has been switched to the shooting mode is stored in the memory 102. In step S <b> 3107, a message 293 “Transition to shooting mode” is displayed on the liquid crystal monitor 105. Then return.

  In step S3108, it is determined whether or not the shooting mode has been switched from the projection reproduction mode in step S3105. This determination is made based on whether or not the memory 102 stores the switch to the shooting mode. When the shooting mode is switched from the projection reproduction mode in step S3105, an affirmative determination is made in step S3108, and the process proceeds to step S3109. If the shooting mode has not been switched from the projection reproduction mode in step S3105, a negative determination is made in step S3108, and the process returns.

  In step S3109, the state of the camera 1 with a projection function is switched from the shooting mode to the projection playback mode. In step S3110, the memory 102 stores that the playback mode has been switched. In step S3111, the projection state information stored in the memory 102 is read. In step S3112, messages 294 and 295 “projection reproduction mode is resumed” are displayed on the projection images projected from the liquid crystal monitor 105 and the projection unit 200. In step S3113, together with the messages 294 and 295, the image is projected and displayed on the liquid crystal panel 105 in the projection state stored in the memory 102, and then the projection is restarted from the image displayed when the projection reproduction mode is interrupted. .

According to the fourth embodiment described above, the following operational effects can be obtained.
(1) In the projection playback mode, the camera 1 with a projection function is switched to the shooting mode when the remaining battery level becomes equal to or less than a predetermined capacity in the shooting mode. Therefore, it can be prevented that the battery 321 is used up in the projection reproduction mode and the photographing cannot be performed.

(2) Since the messages 291 and 292 are displayed before switching from the projection playback mode to the photographing mode and the user is notified that the mode is switched, sudden switching of the mode can be prevented.

(3) Since the message 293 is displayed after switching from the projection playback mode to the shooting mode and the user is notified that the mode has been switched, it is possible to reliably recognize that the mode has been switched to the shooting mode.

(4) The projection state when the projection reproduction mode is interrupted is stored, and the projection reproduction mode is restarted in the stored projection state. Therefore, it is possible to resume from the projected image that was projected when it was interrupted, which is convenient. Further, when the projection reproduction mode is resumed, it is not necessary to adjust brightness, light amount, and the like.

The above fourth embodiment can be modified as follows.
(1) Although the projection state is stored in the memory 102 when the projection reproduction mode is interrupted, the projection state is not limited to when the projection reproduction mode is interrupted, but may be periodically stored. For example, as shown in FIG. 32, every time a negative determination is made in step S3102, the projection state may be stored in the memory 102 in step S3201. In this case, in step S3109, the latest information of the projection state information stored in the memory 102 is read. Further, the projection state may be stored in the memory 102 at regular time intervals such as 1 minute intervals or 5 minute intervals.

(2) When the slide show is resumed, it may be resumed from the image displayed immediately before the image displayed when the projection reproduction mode is interrupted. If the image that was displayed when the projection playback mode was first interrupted is displayed, the image displayed when the projection playback mode is interrupted may shift to the next image without carefully viewing the image. It is.

(3) In the projection playback mode, when the remaining battery level is equal to or less than a predetermined capacity in the shooting mode of the camera 1 with the projection function, the projection playback mode may be prohibited and projection may be disabled. Thereby, after the camera with a projection function 1 is switched to the shooting mode, it is possible to prevent the camera from switching to the projection playback mode by the user's operation and using up the capacity of the battery 321 in the projection playback mode, thereby preventing shooting.

(4) Instead of automatically switching from the projection playback mode to the shooting mode, the projection playback mode may be switched to the shooting mode by a user operation. In this case, when the remaining battery level becomes equal to or less than the predetermined capacity, the camera with a projection function 1 notifies the user to switch from the projection playback mode to the shooting mode. The user who has received the notification manually switches from the projection playback mode to the shooting mode. In some cases, the capacity of the battery 321 may be used up in the projection playback mode. In this case, it is possible to take pictures until the capacity of the battery 321 is used up at the user's discretion, and the convenience of the camera 1 with a projection function is improved.

-Fifth embodiment-
The camera with a projection function 1 according to the fifth embodiment of the present invention prevents variations in the battery remaining amount display in the projection playback mode due to the operating state of the camera with a projection function 1.

  The configuration of the camera 1 with a projection function of the fifth embodiment is the same as that of the first embodiment (see FIGS. 1 to 6). The remaining battery level display in the shooting mode and the liquid crystal playback mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  When the images are switched in the slide show, the image processing semiconductor in the control circuit 101 performs image processing, and the discharge current of the battery 321 increases. At this time, the battery voltage of the battery 321 decreases, and the remaining battery level is displayed low. On the other hand, when a still image is displayed in the slide show, the image processing semiconductor of the control circuit 101 does not perform much image processing, so the discharge current of the battery 321 becomes small. At this time, the battery voltage of the battery 321 increases, and a large amount of remaining battery 321 is displayed. Therefore, when a sladd show is being projected, the battery remaining amount display may increase or decrease and may fluctuate.

  Further, when displaying a moving image, the usage rate of the image processing semiconductor is further increased by executing the moving image encoding, so that the discharge current of the battery 321 is increased and the remaining amount of the battery 321 is displayed less. . In order to prevent such a variation in the battery remaining amount display due to the operating state of the camera 1 with a projection function, the camera 1 with a projection function according to the fifth embodiment detects the battery voltage of the battery 321 while projecting a still image. The remaining amount of the battery 321 is predicted.

  The remaining amount prediction process for the battery 321 according to the fifth embodiment of the present invention will be described with reference to the flowchart of FIG. The processing in FIG. 33 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the camera 1 with a projection function is turned on. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S3301, it is determined whether or not the state of the camera 1 with a projection function is a projection playback mode. If the state of the camera 1 with the projection function is the projection playback mode, an affirmative determination is made in step S3301 and the process proceeds to step S3302. If the state of the camera 1 with a projection function is not the projection playback mode, that is, if it is the shooting mode or the liquid crystal playback mode, a negative determination is made in step S3301, and the process proceeds to step S601. In step S3302, a signal indicating the operation status of the camera with a projection function 1 is received from the control circuit 101, and it is determined whether a still image is being projected. If a still image is being projected, an affirmative decision is made in step S3302 and the process proceeds to step S601. If a still image is not being projected, a negative determination is made in step S3302 and the process returns.

According to the fifth embodiment described above, the following operational effects can be obtained.
While projecting a still image, the battery voltage of the battery 321 is detected and the remaining battery level is predicted. Thereby, since the battery voltage of the battery 321 can be detected in a state where the discharge current of the battery 321 is substantially constant, it is possible to prevent variations in the battery remaining amount display due to the operating state of the camera 1 with a projection function.

The above fifth embodiment can be modified as follows.
(1) FIG. 34A shows the current consumption of the camera with a projection function 1 when images A, B and C having different image patterns are sequentially projected in a slide show. Even for the same still image, the power consumption differs because the power consumption of the liquid crystal panel 222 differs depending on the pattern of the still image (image A, image B, image C). For this reason, as shown in FIG. 34 (b), the battery voltage of the battery 321 also varies depending on the still image pattern (image A, image B, image C). Then, even if the battery voltage of the battery 321 is detected during projection of a still image, the predicted remaining battery level may change depending on the pattern of the still image being projected.

  Therefore, when the battery voltage of the battery 321 is detected, a predetermined image may be projected to prevent variations in the battery remaining amount display due to differences in the pattern of the still image. As the predetermined image, when making the discharge current of the battery 321 constant at a low value, a solid image or a solid image is preferable. Moreover, when making the discharge current of the battery 321 constant at a high value, a checkered pattern image is preferable.

  The remaining amount prediction process of the battery 321 for projecting a predetermined image and detecting the battery voltage of the battery 321 will be described with reference to the flowchart of FIG. The process of FIG. 35 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the mode of the camera 1 with a projection function becomes the projection reproduction mode. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S3501, the control circuit 101 is instructed to project a predetermined image. In step S3502, the control circuit 101 receives a signal indicating that a predetermined image projection operation is being executed. In step S601, the voltage of the battery 321 is detected. In step S3503, the control circuit 101 is instructed to end the predetermined image projection. Then, the process proceeds to step S602.

(2) When the camera 1 with a projection function is connected to a wireless LAN and the wireless communication device 108 operates, the current consumption of the camera 1 with a projection function increases and the discharge current of the battery 321 also increases. At this time, the battery voltage of the battery 321 decreases, and the remaining battery level is displayed low. For this reason, the operation state of the battery remaining amount display varies depending on the operation of the wireless communication device 108. In order to prevent such variation in battery remaining amount display due to the operating state of the camera 1 with a projection function, the battery voltage of the battery 321 is detected after the wireless communication device 108 is stopped, and the remaining battery amount is predicted. Also good.

  The remaining capacity prediction process of the battery 321 for detecting the battery voltage of the battery 321 by stopping the wireless communication apparatus 108 will be described with reference to the flowchart of FIG. The process of FIG. 36 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the mode of the camera 1 with a projection function is the projection reproduction mode. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S 3601, the control circuit 101 is instructed to stop the wireless communication apparatus 108. In step S3602, a signal indicating that the wireless communication apparatus 108 is stopped is received from the control circuit 101. In step S601, the voltage of the battery 321 is detected. In step S3603, the control circuit 101 is instructed to cancel the wireless communication apparatus stop. Then, the process proceeds to step S602.

(3) A projected image by the projection unit 200 is photographed by the photographing unit 100, and the contrast of the projected image is detected. There is a projection image autofocus method in which the projection optical system 221 is adjusted so that the contrast of the projection image photographed by the photographing unit 100 is maximized, and the projection image is focused on the projection surface. When such autofocus of the projection function operates, the current consumption of the camera 1 with the projection function increases and the discharge current of the battery 321 also increases. At this time, the battery voltage of the battery 321 decreases, and the remaining battery level is displayed low. For this reason, the operation state of the battery remaining amount display varies due to the autofocus operation.

  In order to prevent such a variation in the battery remaining amount display due to the operating state of the camera 1 with a projection function, the battery voltage of the battery 321 may be detected after the autofocus is finished to predict the battery remaining amount. .

  The remaining amount prediction process of the battery 321 for detecting the battery voltage of the battery 321 after terminating the autofocus of the projection function will be described with reference to the flowchart of FIG. The processing of FIG. 37 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the mode of the camera 1 with a projection function becomes the projection reproduction mode. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S3701, a signal indicating the operation status of the camera with a projection function 1 is received from the control circuit 101, and it is determined whether or not the autofocus of the projection function is in progress. If the autofocus is being performed, an affirmative determination is made in step S3701 and the process proceeds to step S601. If the autofocus is not in progress, a negative determination is made in step S3301 and the routine returns.

  In addition, when it has the projection image blur prevention function which prevents the blur of a projection image, after prohibiting operation | movement of a projection image blur prevention function, you may make it detect the voltage of the battery 321. FIG. This is because the power consumption of the camera 1 with the projection function is increased also when the projection image blur prevention function is executed.

(4) Since the current consumption of the LED light source 223 is very high, the operation state of the battery remaining amount display varies depending on the variation in the current consumption of the LED light source 223. In order to prevent such variation in the battery remaining amount display due to the operating state of the camera 1 with a projection function, the battery voltage of the battery 321 is detected after the LED light source 223 is turned off, that is, after the LED light source 223 is turned off. The remaining battery capacity may be predicted.

  The remaining amount prediction process of the battery 321 for detecting the battery voltage of the battery 321 after turning off the LED light source 223 will be described with reference to the flowchart of FIG. The process of FIG. 38 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the mode of the camera 1 with a projection function is the projection playback mode. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S3801, it is determined whether one minute has elapsed since the previous voltage detection of the battery 321. This process is performed to detect the voltage of the battery 321 at a cycle of 1 minute. If one minute has elapsed since the last voltage detection of the battery 321, an affirmative determination is made in step S3801, and the flow proceeds to step S3802. If one minute has not elapsed since the previous voltage detection of the battery 321, step S3801 is repeated.

  In step S3802, a signal indicating the operation status of the camera with a projection function 1 is received from the control circuit 101, and it is determined whether the image processing semiconductor is performing image processing. This process is performed in order to detect the voltage of the battery 321 while the current consumption of the camera 1 with a projection function is as small as possible. If the image processing semiconductor is performing image processing, an affirmative decision is made in step S3802 and the routine returns. If the image processing semiconductor is not performing image processing, a negative determination is made in step S3802 and the process proceeds to step S3803.

  In step S3803, the control circuit 101 is instructed to turn off the LED light source 223. In step S3804, a signal notifying that the LED light source 223 is off is received. In step S3805, the system waits for 1/50 second. This process is performed to stabilize the voltage of the battery 321. In step S601, the voltage of the battery 321 is detected. In step S3806, the control circuit 101 is instructed to turn on the LED light source 223. Then, the process proceeds to step S602.

  In order to prevent variation in the current consumption of the LED light source 223, the battery voltage of the battery 321 may be detected by maximizing the light amount and luminance of the LED light source 223 to predict the remaining battery level.

(5) When a slide show is performed in the projection playback mode, the voltage of the battery 321 may be detected before the display of the displayed still image ends and the next still image is displayed. . When the slide show is not performed, the voltage of the battery 321 is detected when the image processing semiconductor is not performing the image processing, thereby preventing variations in the remaining battery level display due to the presence or absence of the slide show.

  The remaining amount prediction process for the battery 321 during the slide show will be described with reference to the flowchart of FIG. The processing in FIG. 39 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when a slide show in the projection reproduction mode is started. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S 3901, the control circuit 101 receives one still image display end signal. In the control circuit 101, when the image processing semiconductor that has been performing image processing for the display preparation processing of the still image to be displayed next ends the processing, it outputs an image processing end signal to the battery remaining amount prediction circuit 323. . In step S3902, an image processing end signal is received from the control circuit 101. In step 3903, the process waits for 1/50 second. This process is for stabilizing the voltage of the battery 321. In step S601, the voltage of the battery 321 is detected. In step S3904, the control circuit 101 is instructed to display the next still image. Then, the process proceeds to step S602.

(6) As shown in FIG. 34B, while the image processing semiconductor of the control circuit 101 is performing image processing, the battery voltage of the battery 321 decreases, but the value is constant. This is because the processing capability of the control circuit 101 is almost maximized during image processing of the image processing semiconductor. Therefore, by detecting the voltage of the battery 321 during the image processing by the image processing semiconductor, it may be possible to prevent variations in the battery remaining amount display due to the operating state of the camera 1 with a projection function.

  The remaining capacity prediction process for the battery 321 for detecting the battery voltage of the battery 321 during the image processing of the image processing semiconductor will be described with reference to the flowchart of FIG. The process of FIG. 40 is performed in the battery remaining amount prediction circuit 323 by executing a program that starts when the mode of the camera 1 with a projection function is the projection playback mode. The processes common to the first embodiment (see FIG. 6) are denoted by the same reference numerals, and differences from the first embodiment will be mainly described.

  In step S4001, a signal indicating the operating status of the camera 1 with a projection function is received from the control circuit 101, and it is determined whether the image processing semiconductor of the control circuit 101 is performing image processing. If the image processing semiconductor of the control circuit 101 is undergoing image processing, an affirmative decision is made in step S4001 and the process proceeds to step S601. If the image processing semiconductor of the control circuit 101 is not being processed, a negative determination is made in step S4001 and the process returns.

(7) The present invention is not limited to the fifth embodiment as long as the remaining amount of the battery 321 is predicted based on the voltage of the battery 321 detected under the condition that the current discharged from the battery 321 becomes substantially constant.

-Sixth Embodiment-
The camera with a projection function 1 according to the sixth embodiment of the present invention limits the operation of some of the functions of the camera 1 with a projection function in order to lengthen the projection time as much as possible when the remaining battery level is low. It is a thing.

  The configuration of the camera with a projection function 1 of the sixth embodiment is the same as that of the first embodiment (see FIGS. 1 to 6). The remaining battery level display in the shooting mode and the liquid crystal playback mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  In the camera 1 with a projection function of the sixth embodiment, in order to increase the projection time as much as possible, when the remaining amount of the battery 321 becomes a predetermined value or less in the projection playback mode, the operation of functions not related to projection is prohibited. To do. For example, the preliminary charging operation of the lighting device 106 is prohibited, or the wireless operation of the wireless communication device 108 is prohibited. Further, the display of the liquid crystal monitor 105 is prohibited, or when the liquid crystal monitor 105 is attached to the input / output terminal connection unit 400, the video terminal 403 is disabled and the operation of the video terminal 403 is prohibited.

  Moreover, you may make it prohibit operation | movement of several functions instead of operation | movement of one function. The operations of a plurality of functions may be prohibited at the same time, or may be prohibited sequentially. When the operation of a plurality of functions is sequentially prohibited, it may be prohibited from a function with large power consumption. For example, the preliminary charging operation of the lighting device 106, the wireless operation of the wireless communication device 108, the display operation of the liquid crystal monitor 105, and the operation of the video terminal 403 may be prohibited. Thereby, the power consumption of the camera 1 with a projection function can be efficiently saved, and the projection time can be extended as much as possible.

  Next, the functional operation prohibiting process according to the sixth embodiment of the present invention will be described with reference to the flowchart of FIG. The process of FIG. 41 is performed in the remaining battery charge management unit 101A of the control circuit 101 by executing a program that starts when the projection playback mode is switched. A first predetermined value, a second predetermined value, a third predetermined value, and a fourth predetermined value, which will be described later, are batteries that start saving power consumption of the camera with a projection function 1 in order to increase the projection time. 321 is the remaining amount. The value decreases in the order of the first predetermined value, the second predetermined value, the third predetermined value, and the fourth predetermined value.

  In step S4101, it is determined whether the remaining battery level is equal to or less than a first predetermined value based on the remaining battery level data of the battery 321 acquired from the remaining battery level prediction circuit 323. If the remaining battery level is equal to or less than the first predetermined value, an affirmative determination is made in step S4101 and the process proceeds to step S4102. If the remaining battery level is greater than the first predetermined value, a negative determination is made in step S4101 and the process returns. In step S4102, the preliminary charging operation of the lighting device 106 is prohibited.

  In step S4103, based on the remaining amount data of the battery 321 acquired from the remaining battery amount prediction circuit 323, it is determined whether the remaining battery amount is equal to or less than a second predetermined value. If the remaining battery level is less than or equal to the second predetermined value, an affirmative determination is made in step S4103 and the process proceeds to step S4104. If the remaining battery level is greater than the first predetermined value, a negative determination is made in step S4103, and the process returns. In step S4104, wireless operation of the wireless communication device 108 is prohibited.

  In step S4105, based on the remaining amount data of the battery 321 acquired from the remaining battery amount prediction circuit 323, it is determined whether or not the remaining battery amount is equal to or less than a third predetermined value. If the remaining battery level is equal to or less than the third predetermined value, an affirmative determination is made in step S4105 and the process proceeds to step S4106. If the remaining battery level is greater than the first predetermined value, a negative determination is made in step S4105, and the process returns. In step S4106, display on the display monitor 105 is prohibited.

  In step S4107, based on the remaining amount data of the battery 321 acquired from the remaining battery amount prediction circuit 323, it is determined whether the remaining battery amount is equal to or less than a fourth predetermined value. If the remaining battery level is less than or equal to the fourth predetermined value, an affirmative decision is made in step S4107 and the process proceeds to step S4108. If the remaining battery level is greater than the fourth predetermined value, a negative determination is made in step S4107, and the process returns. In step S4108, the video terminal 403 is invalidated.

According to the sixth embodiment described above, the following operational effects can be obtained.
(1) Operation of functions not related to projection based on the remaining battery capacity, for example, preliminary charging operation of the lighting device 106, wireless operation of the wireless communication device 108, display operation of the liquid crystal monitor 105, operation of the video terminal 403 Banned. Therefore, the projection time can be lengthened.

(2) Since some of the plurality of operations are prohibited based on the remaining battery capacity, the power consumption of the camera with a projection function 1 can be efficiently saved and the projection time can be extended.

(3) When sequentially prohibiting the operation of a plurality of functions, it is prohibited from the function with large power consumption. For example, the preliminary charging operation of the lighting device 106, the wireless operation of the wireless communication device 108, the display operation of the liquid crystal monitor 105, and the operation of the video terminal 403 are prohibited. Thereby, the power consumption of the camera 1 with a projection function can be saved efficiently, and projection time can be lengthened.

The above sixth embodiment can be modified as follows.
(1) Although the operation of a plurality of functions is sequentially prohibited depending on the remaining battery capacity, the operation of the next function may be prohibited after a predetermined time has elapsed after the operation of one function is prohibited. Since it is not necessary to set a reference value (threshold) for the remaining amount such as the second to fourth predetermined values and check the threshold with the remaining battery amount, the processing can be simplified.

  The functional operation prohibiting process based on the passage of time will be described with reference to the flowchart of FIG. The process of FIG. 42 is performed in the remaining battery charge management unit 101A of the control circuit 101 by executing a program that starts when the projection playback mode is switched.

  In step S4201, it is determined whether or not the remaining battery level is equal to or less than a predetermined value based on the remaining battery level data of the battery 321 acquired from the remaining battery level prediction circuit 323. If the remaining battery level is less than or equal to the predetermined value, an affirmative decision is made in step S4201 and the process proceeds to step S4202. If the remaining battery level is greater than the predetermined value, a negative determination is made in step S4201 and the process returns. In step S4202, the preliminary charging operation of the lighting device 106 is prohibited.

  In step S4203, it is determined whether one minute has elapsed since the preliminary charging operation of the lighting device 106 was prohibited. If one minute has elapsed, an affirmative determination is made in step S4203 and the process proceeds to step S4204. If one minute has not elapsed, step S4203 is repeated. In step S4204, the wireless operation of the wireless communication device 108 is prohibited.

  In step S4205, it is determined whether one minute has elapsed since the wireless operation of the wireless communication apparatus 108 was prohibited. If one minute has elapsed, an affirmative decision is made in step S4205 and the process proceeds to step S4206. If one minute has not elapsed, step S4205 is repeated. In step S4206, display on the display monitor 105 is prohibited.

  In step S4207, it is determined whether one minute has elapsed since the display monitor 105 was prohibited from displaying. If one minute has elapsed, an affirmative decision is made in step S4207 and the process proceeds to step S4208. If one minute has not elapsed, step S4207 is repeated. In step S4208, the video terminal 403 is invalidated.

(2) When the remaining battery level is low, the projection time may be lengthened by reducing the supply current to the LED light source 223. When the supply current to the LED light source 223 decreases, the power consumption of the camera 1 with a projection function decreases, but the projection image becomes dark. However, even if the projected image becomes dark, the human eye immediately gets used to the dark projected image, so that the dark projected image does not feel strange. Therefore, there is no problem even if the projected image becomes dark.

  The supply current control process of the LED light source 223 will be described with reference to the flowchart of FIG. The process of FIG. 43 is performed in the remaining battery charge management unit 101A of the control circuit 101 by executing a program that starts when the projection playback mode is switched. Control of the supply current of the LED light source 223 is performed by switching the mode of the camera 1 with a projection function between the high luminance mode and the low luminance mode. As described above, the high luminance mode is a mode in which the supply of current to the LED light source described later is increased to increase the luminance of the projected image. The low luminance mode is a mode in which the supply of current to the LED light source described later is reduced and the luminance of the projected image is lowered.

  In step S4301, it is determined whether or not the mode of the camera 1 with a projection function is a high luminance mode. When the mode of the camera with a projection function 1 is the high luminance mode, an affirmative determination is made in step S4301 and the process proceeds to step S4302. If the mode of the camera 1 with projection function is not the high luminance mode, that is, if the mode of the camera 1 with projection function is the low luminance mode, a negative determination is made in step S4301, and the process returns. In step S4302, whether or not the remaining battery level is equal to or less than a predetermined value is determined based on the remaining battery level data of the battery 321 acquired from the remaining battery level prediction circuit 323. If the remaining battery level is equal to or less than the predetermined value, an affirmative determination is made in step S4302 and the process proceeds to step S4303. If the remaining battery level is greater than the predetermined value, a negative determination is made in step S4302 and the process returns.

  In step S4303, a message “Battery level is low, so switch to low brightness mode.” Is displayed on the projection image to notify the switch to low brightness mode. In step S4304, the current supplied to the LED light source 223 is reduced and the mode is switched to the low luminance mode.

(3) In the case of sequentially prohibiting the operation of a plurality of functions, it is prohibited from the function with large power consumption, but the order of sequentially prohibiting the operations of the plurality of functions is not limited to the embodiment. For example, the operation may be prohibited in the order of the functions that are less required to be used in the projection playback mode. For example, in the projection reproduction mode, the lighting device 106 is not caused to emit light, so that the preliminary charging operation of the lighting device 106 is first prohibited. Next, since there is no need to display the liquid crystal monitor 105, the display operation of the liquid crystal monitor 105 is prohibited.

  When the wireless communication device 108 and the video terminal 403 are used to receive image data and project the image, the wireless communication device 108 and the video terminal 403 may be used. In this case, since the wireless communication device 108 is less likely to be used, the wireless operation of the wireless communication device 108 is prohibited next. Finally, the operation of the video terminal 403 may be prohibited.

(4) When the projection of the projected image is completed or stopped, the prohibition of the operation may be canceled. For example, in step S4401 in FIG. 44, it is determined whether or not the projection has been completed or stopped. If the projection is completed or stopped, an affirmative determination is made in step S4401, and the process proceeds to step S4402. If the projection is continued, a negative determination is made in step S4401, and the process directly returns. In step S4402, the prohibition / invalidity of the operation performed to save power consumption of the camera 1 with a projection function is canceled.

(5) Operation prohibition may not be performed in a state where the camera 1 with a projection function is supplied with power from the outside. For example, the camera 1 with a projection function is connected to the input / output terminal connection unit 400 shown in FIG. 3 and power is supplied from the DC input terminal 404 to the camera 1 with a projection function. When it becomes unnecessary to save the power consumption of the camera 1 with the projection function, the operation is not automatically prohibited, so that the convenience of the camera 1 with the projection function is improved.

(6) Data may be received using the wireless communication apparatus 108, and the camera 1 with a projection function may project based on the data. In such a case, if the wireless operation of the wireless communication device 108 is prohibited, projection cannot be performed. Therefore, transmission / reception of data instructing projection of the projection unit 200 to / from an external device by the wireless communication apparatus 108 may be permitted, and transmission / reception of data other than data instructing projection of the projection unit 200 may be prohibited. . It is possible to prevent the projection from becoming impossible even if the projection time is increased.

-Seventh embodiment-
In order to save power consumption, the camera with a projection function 1 according to the seventh embodiment of the present invention stops the projection when the connection of the external interface circuit 104 to an external device is detected.

  The structure of the camera 1 with a projection function of 7th Embodiment is the same as that of 1st Embodiment (refer FIGS. 1-6). The remaining battery level display in the shooting mode and the liquid crystal playback mode and the remaining battery level display in the projection playback mode are the same as in the first embodiment (see FIG. 7).

  When the camera 1 with a projection function is connected to an external device through an external interface, it is conceivable to view an image through a personal computer or a television. In such a case, since it is not necessary to project and show an image, it is wasteful to continue projecting the projected image. Therefore, in order to save power consumption of the camera 1 with a projection function and extend the life of the battery 321, when a connection with an external device of the external interface circuit 104 is detected during projection of a projection image from the projection unit 200, the projection is performed. Was canceled.

  The projection control process of the seventh embodiment of the present invention will be described with reference to the flowchart of FIG. The processing in FIG. 45 is performed in the control circuit 101 by executing a program that starts when switching to the projection reproduction mode.

  In step S4501, it is determined whether or not a projection image is projected from the projection unit 200. If a projection image is projected from the projection unit 200, an affirmative decision is made in step S4501 and the process proceeds to step S4502. If a projection image is not projected from the projection unit 200, a negative determination is made in step S4501, and the process returns. In step S4502, it is determined whether an external device is connected to the external interface. If an external device is connected to the external interface, an affirmative determination is made in step S4502 and the process proceeds to step S4503. If an external device is not connected to the external interface, a negative determination is made in step S4502, and the process returns. In step S4503, the projection by the projection unit 200 is stopped.

-Common modification-
The above first to seventh embodiments can be modified as follows.
Although the first to seventh embodiments have been described by taking the camera 1 with a projection function as an example, the present invention is not limited to the camera 1 with a projection function as long as it is a portable electronic device with a projection function. In this case, a mode in which a projection image is projected by a portable electronic device with a projection function corresponds to a projection playback mode, and a mode in which the main functions of the portable electronic device with a projection function are operated corresponds to a shooting mode. For example, in the case of a mobile phone with a projection function, the mode for projecting a projected image on the mobile phone with a projection function corresponds to the projection playback mode, and the mode for calling on the mobile phone with a projection function corresponds to the shooting mode. Generally, the power consumption is larger when a projected image is projected than when the main functions of a portable electronic device with a projection function are operated. Therefore, according to the present invention, it is possible to appropriately manage the remaining battery level and display the remaining battery level even in a portable electronic device with a projection function.

  The above description is merely an example, and the present invention is not limited to the configuration of the above embodiment.

It is the figure which looked at the camera with a projection function by one embodiment of this invention from the front and back. It is a block diagram explaining the structure of a camera with a projection function. It is a figure for demonstrating an input / output terminal unit. It is a figure for demonstrating a projection unit. It is a figure for demonstrating the structure of a battery residual amount prediction circuit. It is a flowchart for demonstrating the battery residual amount prediction process of a battery residual amount prediction circuit. It is a figure for demonstrating the relationship between a battery battery voltage and a battery remaining charge display. It is a figure for demonstrating the battery remaining charge display in the 1st Embodiment of this invention. It is a flowchart for demonstrating the battery remaining amount display process in the 1st Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining amount display of the projection reproduction | regeneration mode in the 1st Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining amount display of the projection reproduction | regeneration mode in the 1st Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining amount display of the projection reproduction | regeneration mode in the 1st Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining amount display of the projection reproduction | regeneration mode in the 1st Embodiment of this invention. It is a figure for demonstrating the battery remaining charge display in the 2nd Embodiment of this invention. It is a flowchart for demonstrating the battery remaining amount display process in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining charge display in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining charge display in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification of the battery remaining charge display in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification which displayed the battery residual amount display on the projection image and the liquid crystal monitor in the battery residual amount display in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification which displayed the battery residual amount display on the projection image and the liquid crystal monitor in the battery residual amount display in the 2nd Embodiment of this invention. It is a figure for demonstrating the modification which displayed the battery residual amount display on the projection image and the liquid crystal monitor in the battery residual amount display in the 2nd Embodiment of this invention. In the battery remaining amount display in the second embodiment of the present invention, the battery remaining amount display when the number of segments of the battery remaining amount display in the projection playback mode and the number of segments of the battery remaining amount display in the shooting mode are changed is displayed. It is a figure for demonstrating a modification. It is a figure for demonstrating the projection function notification in the 3rd Embodiment of this invention. It is a flowchart for demonstrating the projection function notification process in the 3rd Embodiment of this invention. It is a figure for demonstrating the modification of the projection function notification in the 3rd Embodiment of this invention. It is a figure for demonstrating the modification of the projection function notification which displayed the dividing line in the projection function notification in the 3rd Embodiment of this invention. It is a figure for demonstrating the modification of the projection function notification which displayed the dividing line in the projection function notification in the 3rd Embodiment of this invention. It is a figure for demonstrating the modification of the projection function notification using segment extinction in the projection function notification in the 3rd Embodiment of this invention. It is a figure for demonstrating the automatic switch between the projection reproduction | regeneration mode and imaging | photography mode in the 4th Embodiment of this invention. It is a figure for demonstrating the automatic switch between the projection reproduction | regeneration mode and imaging | photography mode in the 4th Embodiment of this invention. It is a flowchart for demonstrating the automatic switching process between the projection reproduction | regeneration mode and imaging | photography mode in the 4th Embodiment of this invention. It is a flowchart for demonstrating the modification of the automatic switching process between the projection reproduction | regeneration mode and imaging | photography mode in the 4th Embodiment of this invention. It is a flowchart for demonstrating the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a figure for demonstrating the consumption current and battery battery voltage of a camera with a projection function when images with different image patterns are sequentially projected in a slide show. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the modification of the battery remaining charge prediction process in the 5th Embodiment of this invention. It is a flowchart for demonstrating the function operation prohibition process in the 6th Embodiment of this invention. It is a flowchart for demonstrating the modification of the function operation | movement prohibition process in the 6th Embodiment of this invention. It is a flowchart for demonstrating the supply current control process of the LED light source which is a modification of the 6th Embodiment of this invention. It is a flowchart for demonstrating the modification of the function operation | movement prohibition process in the 6th Embodiment of this invention. It is a flowchart for demonstrating the projection control process of the 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera 101 with a projection function Control circuit 101A Battery remaining amount management part 101B Remaining amount display control part 102 Memory 103 Operation member 103G Delete button 104 External interface circuit 105 Liquid crystal monitor 105A Display part 106 Illuminating device 108 Radio | wireless apparatus 100 Imaging unit 200 Projection unit 221 Projection optical system 223 LED light source 300 Power supply unit 321 Battery 323 Battery remaining amount prediction circuit 403 Video terminal

Claims (13)

A projection unit for projecting a projection image;
An operation unit for performing a predetermined operation other than the projection;
A detection unit for detecting the remaining battery level;
A portable electronic device with a projection function, comprising: a control unit that prohibits the operation of the operation unit based on the remaining battery level detected by the detection unit. The portable electronic device with a projection function according to claim 1,
The operation unit is a unit that performs a plurality of different operations,
The portable electronic device with a projection function, wherein the control unit prohibits some of the plurality of operations when a remaining battery level is equal to or less than a predetermined value. The portable electronic device with a projection function according to claim 1,
The operation unit is a unit that performs a plurality of different operations,
The portable electronic device with a projection function, wherein the control unit sequentially prohibits an operation with large power consumption among the plurality of operations in accordance with the remaining battery level. The portable electronic device with a projection function according to claim 1,
The operation unit is a unit that performs a plurality of different operations,
The portable electronic device with a projection function, wherein the control unit sequentially prohibits an operation with large power consumption among the plurality of operations every predetermined time. The portable electronic device according to any one of claims 1 to 4, is a camera with a projection function,
The camera with a projection function, wherein the predetermined operation other than the projection includes an operation of photographing a subject. The camera with a projection function according to claim 5,
It has a video terminal,
The operation unit has an operation of transmitting and receiving commands and data between the video terminal and an external device,
The camera with a projection function, wherein the control unit prohibits the operation of the video terminal. The camera with a projection function according to claim 5,
A lighting device;
A charging device,
The operation unit has an operation of charging the charging device with electric power for causing a flash to be emitted from the illumination device,
The camera with a projection function, wherein the control unit prohibits charging of the charging device. The camera with a projection function according to claim 5,
Equipped with a display monitor,
The operation unit has an operation of displaying an image on the display monitor,
The camera with a projection function, wherein the control unit prohibits display of the display monitor. The camera with a projection function according to claim 5,
A wireless communication device,
The operation unit has an operation of transmitting and receiving data to and from an external device by the wireless communication device,
The camera with a projection function, wherein the control unit prohibits data transmission / reception with an external device by the wireless communication device. The camera with a projection function according to claim 5,
A wireless communication device,
The operation unit has an operation of transmitting and receiving data to and from an external device by the wireless communication device,
The control unit permits transmission / reception of data instructing the operation of the projection unit to / from an external device by the wireless communication device, and prohibits transmission / reception of data other than data instructing the operation of the projection unit. A camera with a projection function. A projection unit for projecting a projection image;
An operation unit for performing a predetermined operation other than the projection;
A detection unit for detecting the remaining battery level;
A portable electronic device with a projection function, comprising: a control unit that controls a current supplied to a light source of the projection unit based on the remaining battery level detected by the detection unit. The portable electronic device according to claim 11 is a camera with a projection function,
A camera with a projection function, wherein the predetermined operation other than the projection is an operation of photographing a subject. The portable electronic device according to claim 11 is a mobile phone with a projection function,
The mobile phone with a projection function, wherein the predetermined operation other than the projection is a call function operation.

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