JP4952333B2 - Camera with projector - Google Patents

Description

  The present invention relates to a camera with a projector.

  There is known a projector that automatically terminates projection (auto power off) when a preset continuous projection time has elapsed (see Patent Document 1).

JP 2007-74650 A

  In the prior art, for example, a case where projection cannot be performed depending on the state of the device, such as a shortage of remaining battery power when driving the battery, has not been considered.

A camera with a projector according to a first aspect includes a projection unit that projects an optical image, and a control unit that limits a continuous projection time of the projection unit based on information indicating heat generated by the projection unit. The continuous projection time is a slide show projection time in which the projection unit projects while changing the projection content, and the control means controls the projection unit to change the reproduction speed of the projection content according to the continuous projection time. Further control is provided.
A camera with a projector according to a second aspect of the present invention includes a projection unit that projects an optical image, and a control unit that limits a continuous projection time of the projection unit based on information indicating heat generated by the projection unit. The continuous projection time is a slide show projection time in which the projection unit projects while changing the projection content, and the control means selects the projection content according to the continuous projection time and causes the projection unit to project the projection content. Features.
A camera with a projector according to a third aspect of the present invention is a projection unit that projects an optical image, and a control unit that calculates a time limit for continuous projection of the projection unit based on information indicating heat generated by the projection unit. A display unit that displays the time limit calculated by the control unit, the time limit of the continuous projection is a slide show projection time that the projection unit projects while changing the projection content, the control unit, The projection unit is further controlled to change the reproduction speed of the projection content according to the time limit of the continuous projection .
A camera with a projector according to claim 4 is a projection unit that projects an optical image, and a control unit that calculates a time limit for continuous projection of the projection unit based on information indicating heat generated in the projection unit. A display unit that displays the time limit calculated by the control unit, the time limit of the continuous projection is a slide show projection time that the projection unit projects while changing the projection content, the control unit, The projection content corresponding to the continuous projection time is selected and projected onto the projection unit .

  In the camera with a projector according to the present invention, the continuous projection time of the projection unit can be appropriately limited according to the state of the device.

The best mode for carrying out the present invention will be described below with reference to the drawings.
≪Electronic camera≫
FIG. 1 is a front view of an electronic camera with a projector according to an embodiment of the present invention. In FIG. 1, a photographing lens 71, a projection lens 61, a laser light source unit 13, and a flash light source unit 21 are disposed on the front surface of the electronic camera 10. On the top surface of the electronic camera 10, a zoom switch 11, a release button 12, and a projector button 14 are disposed. The release button 12 is an operation member for instructing the electronic camera 10 to take a picture. The zoom switch 11 is an operation member for instructing the electronic camera 10 to zoom down or zoom up. The projector button 14 is an operation member for instructing the electronic camera 10 to perform projection.

  FIG. 2 is a rear view of the electronic camera of FIG. In FIG. 2, a display monitor 108, a switching button 15, a mode button 16, a menu button 17, a delete button 18, an OK button 20 and a dial 19 are provided on the back of the electronic camera 10. The dial 19 configured in a ring shape generates a rotation operation signal corresponding to the rotation operation and a pressing position signal corresponding to the pressing operation. The OK button 20 is disposed at the center of the dial 19. The dial 19 and the OK button 20 are operation members for instructing the electronic camera 10 to make various settings.

  The switch button 15 is an operation member for instructing the electronic camera 10 to switch between a shooting mode for shooting and a playback mode for playing back and displaying a shot image. The mode button 16 is an operation member for causing the liquid crystal monitor 108 to display a mode selection screen on which menus are arranged. The menu button 17 is an operation member for causing the liquid crystal monitor 108 to display a menu selection screen. The delete button 18 is an operation member for instructing the electronic camera 10 to delete an image file.

  The electronic camera 10 can be used even when placed on the cradle 50. The electronic camera 10 is configured to be able to receive power from the cradle 50 in addition to performing predetermined communication with the cradle 50. The electronic camera 10 charges the battery 103 (described later in FIG. 3) in the electronic camera 10 with the current supplied from the cradle 50, or operates the electronic camera 10 with the current supplied from the cradle 50.

  FIG. 3 is a block diagram illustrating a circuit configuration of the electronic camera 10 of FIG. In FIG. 3, an electronic camera 10 includes a CPU 101, a memory 102, a microphone 105, an external interface circuit 106, a power supply circuit 107, a display monitor 108, an operation member 109, a speaker 110, a laser light source 13, A projector module 60 and a camera module 70 are provided, and a detachable battery 103 and a memory card 104 are mounted. As shown in FIG. 1, the projector module 60 and the camera module 70 have the projection optical system (projection lens 61) and the photographing optical system (photographing lens 71) on the same plane.

  Based on the control program, the CPU 101 performs a predetermined calculation using signals input from each unit constituting the electronic camera 10 and sends a control signal to each unit of the electronic camera 10 to perform camera operation and Each projector operation is controlled. The control program is stored in a nonvolatile memory (not shown) in the CPU 101. The CPU 101 further performs trapezoidal distortion correction (keystone correction) on the image data projected by the projector module 60 by image processing.

  The memory 102 is used as a working memory for the CPU 101. The memory card 104 is composed of a non-volatile memory. According to an instruction from the CPU 101, for example, image data output from the camera module 70 or data such as video / audio data input from the outside via the external interface circuit 106 is written. Can be stored and read.

  The microphone 105 converts the collected sound into an electrical signal and sends it to the CPU 101. The audio signal is recorded on the memory card 104 during recording. The external interface circuit 106 transmits / receives data to / from a cradle described later or an external device connected to the cradle according to an instruction from the CPU 101. Data to be transmitted / received is video / audio data or a control signal for the electronic camera 10. The external interface circuit 106 also includes a power supply line.

  The speaker 110 reproduces sound based on the sound signal output from the CPU 101. The operation member 109 includes the operation buttons described above, and sends operation signals corresponding to the operation buttons to the CPU 101.

  The battery 103 is constituted by a rechargeable secondary battery. The power supply circuit 107 includes a DC / DC conversion circuit, a charging circuit, and a voltage detection circuit, and converts the voltage of the battery 103 into a voltage necessary for each part in the electronic camera 10. The power supply circuit 107 further charges the battery 103 with a charging current supplied via the external interface circuit 106 when the voltage of the battery 103 is low and the remaining capacity is low.

  The display monitor 108 has a liquid crystal display panel, and displays information such as images and texts according to instructions from the CPU 101. The laser light source unit 13 emits red visible light, for example, in front of the electronic camera 10 in response to an instruction from the CPU 101. The laser beam section 13 has an optical system 13A and a drive mechanism (not shown) that moves the optical system 13A forward and backward in a direction orthogonal to the optical axis. This drive mechanism drives the optical system 13 </ b> A according to an instruction from the CPU 101, so that the emitted light from the laser beam unit 13 reaches any position within the projection range by the projector module 60. That is, the laser beam unit 13 functions as a laser pointer.

  The flash light source unit 21 emits a predetermined amount of light in response to an instruction from the CPU 101 in the shooting mode. In addition, when a projector module 60 described later is used, a predetermined amount of light is emitted in response to an instruction from the CPU 101.

(The camera module)
The camera module 70 includes a shooting lens (shooting optical system) 71, an image sensor 72, a lens driving circuit 73, and a shooting control circuit 74. As the image sensor 72, a CCD, a CMOS image sensor or the like is used. The imaging control circuit 74 controls driving of the image sensor 72 and the lens driving circuit 73 in accordance with an instruction from the CPU 101 and performs predetermined image processing on the imaging signal (accumulated charge signal) output from the image sensor 72. Image processing includes white balance processing and gamma processing.

  The photographing lens 71 forms a subject image on the imaging surface of the image sensor 72. The imaging control circuit 74 causes the image sensor 72 to start imaging in response to the imaging start instruction, reads the accumulated charge signal from the image sensor 72 after the imaging is completed, sends the image processing to the CPU 101 as image data.

  The lens driving circuit 73 drives a focus lens (not shown) constituting the photographing lens 71 forward and backward in the optical axis direction based on the focus adjustment signal output from the photographing control circuit 74. The lens driving circuit 73 drives the zoom lens (not shown) constituting the photographing lens 71 to advance and retreat in the optical axis direction (tele side or wide side) based on the zoom adjustment signal output from the photographing control circuit 74. . The focus adjustment amount and the zoom adjustment amount are instructed from the CPU 101 to the photographing control circuit 74.

(Camera focus adjustment)
The camera module 70 adjusts the focus of the photographing lens 71 by shifting the focus lens constituting the photographing lens 71 in the optical axis direction. When performing autofocus adjustment, the CPU 101 integrates high frequency components (so-called focus evaluation value) for the image signal corresponding to the focus detection area (for example, the center of the shooting screen) among the image signals captured by the image sensor 72. A focus adjustment signal is sent to the imaging control circuit 74 so as to maximize. The position of the focus lens that maximizes the focus evaluation value is a focus position that eliminates blurring of the edge of the subject image captured by the image sensor 72 and maximizes the contrast of the image.

(Camera zoom adjustment)
The camera module 70 performs optical zoom adjustment of the photographing lens 71 by shifting the zoom lens constituting the photographing lens 71 in the optical axis direction. The CPU 101 sends a zoom adjustment signal to the photographing control circuit 74 in accordance with a zoom operation signal from the operation member 109 (zoom switch 11).

(Projector module)
The projector module 60 includes a projection lens (projection optical system) 61, a liquid crystal panel 62, an LED light source 63, a projection control circuit 64, and a lens drive circuit 65. The projection control circuit 64 supplies a drive current to the LED light source 63 in accordance with a projection instruction output from the CPU 101. The LED light source 63 illuminates the liquid crystal panel 62 with brightness according to the supplied current.

  The projection control circuit 64 further generates a liquid crystal panel drive signal in accordance with the image data sent from the CPU 101, and drives the liquid crystal panel 62 with the generated drive signal. Specifically, a voltage corresponding to the image signal is applied to the liquid crystal layer for each pixel. In the liquid crystal layer to which a voltage is applied, the arrangement of liquid crystal molecules changes, and the light transmittance of the liquid crystal layer changes. Thus, the liquid crystal panel 62 generates an optical image by modulating the light from the LED light source 63 in accordance with the image signal.

  The projection lens 61 projects the light image emitted from the liquid crystal panel 62 onto a screen or the like. Based on the offset adjustment signal output from the projection control circuit 64, the lens driving circuit 65 drives the projection lens 61 to advance and retract in a direction orthogonal to the optical axis. Further, the lens driving circuit 65 drives the focus lens (not shown) constituting the projection lens 61 to advance and retreat in the optical axis direction based on the focus adjustment signal output from the projection control circuit 64. The lens driving circuit 65 further drives a zoom lens (not shown) constituting the projection lens 61 forward and backward in the optical axis direction based on the zoom adjustment signal output from the projection control circuit 64. The offset adjustment amount, the focus adjustment amount, and the zoom adjustment amount are instructed from the CPU 101 to the projection control circuit 64.

(Projected image offset)
By shifting the projection lens 61 in a direction orthogonal to the optical axis, the emission direction of the light beam emitted from the projector module 60 changes, and the projection image is offset. In addition to shifting the projection lens 61, the projection image may be offset by shifting the liquid crystal panel 62 and the LED light source 63 in the direction perpendicular to the optical axis. That is, the offset of the projected image can be realized by changing the relative positional relationship between the projection lens 61 and the liquid crystal panel 62 in a direction perpendicular to the optical axis.

(Keystone correction of projected image)
When a part of the projection lens 61, the liquid crystal panel 62, and the LED light source 63 is shifted in a direction perpendicular to the optical axis, keystone correction is performed on the data to be projected according to the shift amount. Since the projection image changes to a trapezoidal shape only by giving the offset to the projection image, the CPU 101 performs electrical keystone correction by image processing to correct the projection image from a trapezoidal shape to a rectangular shape. The memory in the CPU 101 stores an initial correction value for correcting the projected image into a square shape in advance. The CPU 101 reads an initial correction value corresponding to the offset adjustment amount, performs keystone correction processing on the image data to be projected based on the read initial correction value on the memory 102, and outputs the image data after the keystone correction processing to the projection control circuit. 64.

(Focus adjustment of projected image)
By shifting the focus lens constituting the projection lens 61 in the optical axis direction, the projector module 60 adjusts the focus of the projected image. The CPU 101 sends a focus adjustment signal to the projection control circuit 64 in accordance with the operation signal from the operation member 109.

(Zoom adjustment of projected image)
By shifting the zoom lens constituting the projection lens 61 in the optical axis direction, the projector module 60 performs zoom adjustment of the projected image. The CPU 101 sends a zoom adjustment signal to the projection control circuit 64 in accordance with an operation signal from the operation member 109.

(Projection source: source)
The projector module 60 receives the following source 1. ~ Source 3. Project and play back content based on either Whenever the source switching operation signal is input from the operation member 109, the CPU 101 converts the projection image into the source 1. → 2. → 1. Image data corresponding to each image is sent to the projector module 60 so as to be switched in this order.

Source 1. 1. Reproduced image source based on data read from the memory card 104 Reproduced image by data input from external interface circuit 106

  The CPU 101 uses the source 1. When the image corresponding to is projected, the image data with the newest recording date and time (the last recorded image data taken) is read sequentially from the memory card 104, and the read image data is sent to the projector module 60. Send it out. When text data is selected as the content data, data for projecting the text screen is sent to the projector module 60.

≪Cradle≫
FIG. 4 is a block diagram illustrating a circuit configuration of the cradle 50. 4, the cradle 50 includes a CPU 501, a memory 502, an operation member 503, a hard disk drive (HDD) 504, a power circuit 506, a detection switch 508, a projector interface (I / F) circuit 510, A stereo speaker system 509 and an external interface (I / F) circuit 505 are provided, and a battery 507 and a memory card 508 are mounted.

  The CPU 501 that is a controller performs a predetermined calculation using signals input from the respective parts constituting the cradle 50 based on the control program, and sends control signals to the respective parts of the cradle 50 to thereby transmit the cradle 50. To control the operation. The control program is stored in a nonvolatile memory (not shown) in the CPU 501.

  The memory 502 is used as a working memory for the CPU 501. The operation member 503 sends an operation signal corresponding to each operation switch to the CPU 501.

  The memory card 508 is a recording medium configured by a nonvolatile memory. The memory card 508 can individually write, save, and read data such as video / audio data in accordance with instructions from the CPU 501.

  A hard disk drive (HDD) 504 is a recording device having a larger capacity than a memory card. A hard disk drive (HDD) 504 can write, save, and read data such as video / audio data in accordance with instructions from the CPU 501. The hard disk drive (HDD) 504 is configured to be able to copy and save image data projected by the electronic camera 10 and save history information of image data projected by the electronic camera 10.

  The external interface circuit 505 transmits / receives data to / from an external device such as a personal computer (PC) according to an instruction from the CPU 501. Data to be transmitted / received includes data transmitted from the electronic camera 10, data stored in the cradle 50, data transmitted from an external device, a control signal for the electronic camera 10, and the like. The stereo speaker system 509 performs stereo reproduction of the audio signal output from the CPU 501. The stereo speaker 509 includes an amplifier circuit, and the diameter of each speaker is configured to be larger than that of the speaker 110 on the electronic camera 10 side, so that higher quality reproduction can be performed.

  The battery 507 is constituted by a rechargeable secondary battery, and supplies power to each part in the cradle 50. The power supply circuit 506 includes a DC / DC conversion circuit, a charging circuit, and a voltage detection circuit, and converts the voltage of the battery 507 into a voltage necessary for each part in the cradle 50. The power supply circuit 506 further charges the battery 507 with a current supplied from the commercial power supply via the AC / DC adapter 510 when the voltage of the battery 507 is low and the remaining capacity is low.

  The power supply circuit 506 is configured to supply power also to the electronic camera 10 mounted on the cradle 50. The capacity of the battery 507 is configured to be larger than the capacity of the battery 103 on the electronic camera 10 side, and the cradle 50 and the electronic camera 10 can be driven by the power of the battery 507 even when a commercial power source is not connected to the cradle 50.

  The detection switch 508 is turned on when the electronic camera 10 is placed on the device placement portion on the cradle 50 and sends a detection signal to the CPU 501. When the electronic camera 10 is not placed on the equipment placement section, it is turned off and no detection signal is sent out.

  The projector interface circuit 510 transmits and receives data to and from the electronic camera 10 (external interface circuit 106) according to instructions from the CPU 501. Data transmitted from the electronic camera 10 is video / audio data or the like. Data transmitted to the electronic camera 10 is a control signal for the electronic camera 10. The projector interface circuit 510 also includes a power supply line.

  Since the present embodiment is characterized in the operation when the projector module 60 is used, the description will focus on the projection by the projector module 60. When the projector button 14 is pressed, the electronic camera 10 causes the projector module 60 to start projection. When the projector button 14 is pressed during projection, the projector module 60 stops projection. The electronic camera 10 further performs the following control regarding projection.

1. Continuous Projection Time The electronic camera 10 limits the upper limit of the continuous projection time to, for example, 10 minutes. The electronic camera 10 automatically stops the projection even if the projector button 14 is not pressed when 10 minutes have elapsed since the start of projection. In this case, when it is one minute before the time limit (in this example, 9 minutes have elapsed since the start of projection), a message “soon 10 minutes” is overlaid on the projection image and displayed. When the electronic camera 10 reaches 30 seconds before the time limit (in this example, 9 minutes and 30 seconds have elapsed from the start of projection), the electronic camera 10 projects and displays a message “30 seconds left” superimposed on the projected image.

  Further, the electronic camera 10 projects and displays a display that counts down the remaining number of seconds when the remaining 30 seconds are cut until the time limit is overlaid on the projection image. When the time limit is reached, the electronic camera 10 causes the projector module 60 to end projection.

  The electronic camera 10 that has finished projecting by the projector module 60 due to reaching the time limit does not allow the projector module 60 to project until the same time (10 minutes in this example) as the time limit has elapsed since the end of the projection. . If the projector button 14 is pressed before 10 minutes have elapsed, the electronic camera 10 displays a message “Cooling” on the liquid crystal monitor 108 for a predetermined time (for example, 10 seconds).

  The time limit is determined in consideration of at least one of the discharge state of the battery 103 and the heat generation state (heat dissipation state) in the electronic camera 10. When calculating the time limit based on the discharge state of the battery 103, the time limit is calculated with reference to a table showing the relationship between the voltage of the battery 103 and the continuous projection time of the projector module 60. This table outputs the continuous projection time with the voltage value of the battery 103 and the current value supplied to the LED light source 63 (corresponding to the projection luminance) as arguments, and is stored in the CPU 101 in advance. In addition, the battery 103 is not used up completely, but a table is made so as to secure a remaining capacity required for photographing a predetermined number (for example, five) after the projection is completed.

  When calculating the time limit using a thermal model based on the heat generation state (heat dissipation state) in the electronic camera 10, refer to a table showing the relationship between the current value supplied to the LED light source 63 and the continuous projection time of the projector module 60. To calculate. This table outputs the continuous projection time with the current value (corresponding to the projection luminance) supplied to the LED light source 63 as an argument, and is stored in the CPU 101 in advance.

  When the electronic camera 10 calculates the time limit based on both the discharge state of the battery 103 and the heat generation state (heat dissipation state) in the electronic camera 10, the shorter time of the two consecutive projection times. Is adopted. The above-mentioned 10 minutes is an example, and it may be appropriately changed according to the capacity of the battery 103 to be used, the heat radiation characteristics of the electronic camera 10, and the like. When the electronic camera 10 is supplied with power from the cradle 50, the continuous projection time is calculated based on the heat generation state (heat dissipation state) in the electronic camera 10 regardless of the remaining capacity (battery voltage) of the battery 103. do it.

2. Leave battery level for shooting (Aspect 1)
The electronic camera 10 controls the projection of the projector module 60 so as to ensure the remaining battery level for photographing. When the electronic camera 10 placed on the cradle 50 starts the projection with the projector module 60 in a state where the electric power is supplied from the cradle 50, the electric camera is not supplied with electric power from the cradle 50. 10 projects, for example, a message “Return connection” on the projected image. The electronic camera 10 starts a countdown of 30 seconds and projects and displays a message “It will end in XX seconds”.

  If the power supply from the cradle 50 has not been restored, the electronic camera 10 causes the projector module 60 to end projection when the count time reaches 30 seconds. On the other hand, when the power supply from the cradle 50 is restored or when an operation signal is input from the operation member 109, the electronic camera 10 turns off the projection display of the message and continues the projection.

3. Leave battery level for shooting (Aspect 2)
The electronic camera 10 controls the projection of the projector module 60 so as to ensure the remaining battery level for photographing. When the electronic camera 10 placed on the cradle 50 starts the projection with the projector module 60 in a state where the electric power is supplied from the cradle 50, the electric camera is not supplied with electric power from the cradle 50. 10 determines whether projection can be continued based on the remaining capacity (battery voltage) of the battery 103. Specifically, when the electronic camera 10 continues to project until the time limit (1) above (without power supply from the cradle 50), a predetermined number (for example, 5) of images is still taken after the projection is completed. If it is possible to secure the necessary remaining capacity, it is determined whether projection can be continued. The electronic camera 10 that has determined whether the projection can be continued continues the projection as it is, and automatically stops the projection by the projector module 60 when the time limit is reached.

  On the other hand, the electronic camera 10 that has determined that projection cannot be continued reduces the brightness of the projection light from the projector module 60. When the projection is continued to the time limit of (1) above (without external power supply) in a state where the brightness of the electronic camera 10 is lowered, a predetermined number (for example, 5) is still obtained after the projection ends. If the remaining capacity required for shooting can be secured, projection is continued. If projection cannot be continued until the above-mentioned time limit even if the brightness of the projection light is lowered, or if the remaining capacity required for a predetermined number of images cannot be secured if projection is continued, a 30-second countdown is started. “End in XX seconds” is displayed on the projected image.

  If the power supply from the cradle 50 has not been restored, the electronic camera 10 causes the projector module 60 to end projection when the count time reaches 30 seconds. When the power supply from the cradle 50 is restored, the electronic camera 10 restores the brightness of the projection light from the projector module 60, turns off the message projection display, and continues the projection.

4). The electronic camera 10 that notifies the continuous projection time (time limit) at the time of luminance setting accepts a projection luminance setting operation by the projector module 60 on the menu selection screen displayed on the liquid crystal monitor 108. The electronic camera 10 calculates the expected continuous projection time based on the set brightness, the remaining capacity (battery voltage) of the battery 103, and the heat generation state (heat dissipation state) in the electronic camera 10, and displays the calculated projection time. This is performed on the liquid crystal monitor 108. The calculation method is the same as the time limit of (1) above.

  When the brightness of the projection light is set high, the current value supplied to the LED light source 63 becomes large, so that the projection may not be continued until the calculated time limit depending on the state of the remaining capacity (battery voltage) of the battery 103. Arise. On the other hand, when the brightness of the projection light is set low, the current value supplied to the LED light source 63 is small, so that there is a margin in the remaining capacity of the battery 103 compared to when the brightness is high. The electronic camera 10 recalculates the calculation (1) according to the set luminance and displays the projection time on the liquid crystal monitor 108 (FIG. 9), thereby notifying the user of the expected projection time. In the state where the electronic camera 10 is supplied with power from the cradle 50, the expected continuous projection time is calculated based on the heat generation state (heat dissipation state) in the electronic camera 10 regardless of the remaining capacity (battery voltage) of the battery 103. What is necessary is just to calculate.

5. The luminance is changed according to the remaining capacity of the battery. The electronic camera 10 determines the remaining capacity (battery voltage) and the projection time of the battery 103 so that projection can be continued until the standard reproduction time of the content to be projected or the calculated time limit. Based on the calculated brightness, the projector module 60 is instructed to project at the calculated brightness.

6). The projection content is selected according to the remaining capacity of the battery. The electronic camera 10 calculates the expected continuous projection time based on the remaining capacity (battery voltage) of the battery 103 and the set brightness, and within the calculated projection time until the end. Automatically select content that can be played. The content may be either the content in the memory card 104 or the content input from the external interface circuit 106.

7). The electronic camera 10 calculates the expected continuous projection time based on the remaining capacity (battery voltage) of the battery 103 and the set luminance, and changes the content playback speed according to the remaining capacity of the battery. The playback speed of the content is automatically changed so that the playback ends to the end. Specifically, when the standard reproduction time of the moving image content is longer than the expected continuous projection time, the reproduction speed of the moving image content is increased.

8). Continuing the reproduction of content until a predetermined projection time The electronic camera 10 automatically changes the reproduction speed of the content in order to continue projection for the time limit (1) above or for a time specified in advance. Specifically, when the number of contents is smaller than a predetermined projection time, the content reproduction time is extended. As modes for extending the playback time, (a) a mode in which the playback speed per content is slowed down to increase the playback time, and (b) a series of content playback is repeated without changing the playback time per content. Thus, a mode in which the entire reproduction time is lengthened can be selected.

  The control related to the projector module 60 described above will be described by taking a slide show projection as an example. In slide show projection, projection is continued while changing the playback content. For example, the electronic camera 10 displays a slideshow setting menu screen illustrated in FIG. 5 on the liquid crystal monitor 108. In FIG. 5, “automatic reproduction” and “manual reproduction” are selectable.

  When the electronic camera 10 selects “automatic reproduction”, the setting screen illustrated in FIG. 6 is displayed on the liquid crystal monitor 108. In FIG. 6, the selection item at the time of “automatic reproduction” is configured to be selectable. The electronic camera 10 that projects the slide show by “automatic reproduction” performs, for example, the above-described projection control of 1, 3, and 5-8. Among these, the projection control 5 described above is performed when “time” is set to be prioritized in FIG. 6 and is not performed when “luminance” is set to be prioritized. Further, the above projection control 7 is performed when “shift possible” is set in FIG. 6 and is not performed when “shift impossible” is set.

  In the above-described projection control 8, the control (A) is performed when “extend” is set in FIG. 6, and the control (B) is performed when “repeat” is set in FIG. 6.

  The electronic camera 10 when “manual playback” is selected performs, for example, the above-described 1, 2, and 4 projection controls. The setting contents for “manual playback” can be set through a menu screen (illustrated in FIGS. 7 to 11) displayed when “manual playback” is selected on the slide show setting menu screen of FIG.

  The electronic camera 10 is configured so that selection items for “manual playback” can be selected on the setting screen illustrated in FIG. 7. “Select image” is a menu for selecting playback content. When “Select Image” is selected, the electronic camera 10 causes the liquid crystal monitor 108 to display a content selection screen illustrated in FIG. The user selects image content while viewing the thumbnail image on the display screen. The image content may be a still image or a moving image, and a plurality of image contents may be set.

  “Brightness setting” (FIG. 7) is a menu for instructing the projection brightness. When the “brightness setting” is selected, the electronic camera 10 displays the brightness setting screen illustrated in FIG. 9 on the liquid crystal monitor 108. The electronic camera 10 changes the length of the band display displayed on the liquid crystal monitor 108 according to the brightness changing operation. The electronic camera 10 further performs the calculation of the above (4) and further performs a band display indicating the calculated projection time. Usually, when the luminance is set high, the band display indicating the projection time is shortened, and when the luminance is set low, the band display indicating the projection time is long.

  The electronic camera 10 varies the calculation conditions for the expected continuous projection time between a state in which power is supplied from the cradle 50 and a state in which power is not supplied from the cradle 50. In a state where power is supplied from the cradle 50, the expected continuous projection time is calculated in consideration of the set brightness, the heat generation state in the electronic camera 10, and the heat dissipation state. On the other hand, when no power is supplied from the cradle 50, the expected continuous projection time is calculated based on the set brightness and the remaining capacity (battery voltage) of the battery 103.

  “Sound selection” is a menu for selecting playback content. When “sound selection” is selected, the electronic camera 10 displays a content selection screen illustrated in FIG. 10 on the liquid crystal monitor 108. The user selects the sound content while viewing the file information on the display screen.

  “Volume setting” (FIG. 7) is a menu for instructing the reproduction volume. When “Volume setting” is selected, the electronic camera 10 displays a volume setting screen illustrated in FIG. 11 on the liquid crystal monitor 108. The electronic camera 10 changes the volume display displayed on the liquid crystal monitor 108 in response to the volume change operation.

  The above setting contents are determined when the menu button 17 is pressed and stored in a nonvolatile memory (not shown) in the CPU 101. When the projector button 14 is pressed down, the electronic camera 10 causes the projector module 60 to start projection based on the setting content.

According to the embodiment described above, the following operational effects can be obtained.
(1) Since the continuous projection time of the projector module 60 is limited based on the voltage of the battery 103, for example, the projection can be terminated before the remaining amount of the battery 103 runs out.

(2) Since the continuous projection time of the projector module 60 is limited based on the voltage of the battery 103 and the current value (corresponding to the projection luminance) supplied to the LED light source 63 of the projector module 60, projection is performed with low luminance. Even in the case of projecting with high brightness, the continuous projection time can be appropriately determined from the aspect of the remaining battery level.

(3) Since the continuous projection time of the projector module 60 is limited based on information indicating the heat generated by the projector module 60 (current value supplied to the LED light source 63), for example, the projection is performed before the temperature rises higher than a predetermined temperature. Can be terminated.

(4) Since the continuous projection time of the projector module 60 is limited based on the current value (corresponding to the projection luminance) supplied to the LED light source 63 of the projector module 60, the projection is performed with high luminance even when projection is performed with low luminance. Even in this case, the continuous projection time can be obtained appropriately from the viewpoint of temperature rise.

(5) The above-described projection limitation is effective in the case of slide show projection or moving image projection. It is possible to prevent overdischarge of the battery 103 and overheating of the projector module 60 due to long-time projection such as slide show projection.

(6) The expected continuous projection time is calculated based on the remaining capacity (battery voltage) of the battery 103 and the heat generation state (set brightness) in the electronic camera 10 and is presented on the liquid crystal monitor 108 in advance (FIG. 9). ). Thereby, the user can confirm the expected continuous projection time for starting projection.

(7) When the electronic camera 10 calculates the time limit based on both the discharge state of the battery 103 and the heat generation state (heat dissipation state) in the electronic camera 10, the shorter one of the two consecutive projection times calculated Therefore, the projection time can be appropriately limited according to the state of the electronic camera 10.

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

It is a front view of the electronic camera with a projector by one embodiment of this invention. It is a rear view of the electronic camera of FIG. It is a block diagram explaining the circuit structure of an electronic camera. It is a block diagram explaining the circuit structure of a cradle. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen. It is a figure which illustrates a setting menu screen.

Explanation of symbols

10. Electronic camera 60 ... Projector module 70 ... Camera module 70
101 ... CPU
103 ... Battery 107 ... Power supply circuit 108 ... Display monitor

Claims (6)

A projection unit that projects an optical image;
Control means for limiting the continuous projection time of the projection unit based on information indicating heat generated in the projection unit;
The continuous projection time is a slide show projection time in which the projection unit projects while changing the projection content,
The camera with a projector, wherein the control unit further controls the projection unit so as to change a reproduction speed of the projection content according to the continuous projection time. A projection unit that projects an optical image;
Control means for limiting the continuous projection time of the projection unit based on information indicating heat generated in the projection unit;
The continuous projection time is a slide show projection time in which the projection unit projects while changing the projection content,
The camera with a projector, wherein the control means selects the projection content corresponding to the continuous projection time and causes the projection unit to project the projection content. A projection unit that projects an optical image;
Control means for calculating a time limit for continuous projection of the projection unit based on information indicating heat generated by the projection unit;
A display unit for displaying the time limit calculated by the control means ,
The time limit for the continuous projection is a slide show projection time for the projection unit to project while changing the projection content,
The camera with a projector , wherein the control unit further controls the projection unit so as to change a reproduction speed of the projection content according to a time limit of the continuous projection . A projection unit that projects an optical image;
Control means for calculating a time limit for continuous projection of the projection unit based on information indicating heat generated by the projection unit;
A display unit for displaying the time limit calculated by the control means,
The time limit for the continuous projection is a slide show projection time for the projection unit to project while changing the projection content,
The camera with a projector , wherein the control means selects the projection content corresponding to the continuous projection time and causes the projection unit to project the projection content . In the camera with a projector as described in any one of Claims 1-4 ,
The camera with a projector , wherein the control unit further controls the projection unit so as to extend a reproduction time of the projection content according to a time limit of the continuous projection . The camera with a projector according to claim 5,
The camera with a projector, wherein the control means controls the projection unit so as to delay the reproduction time of the projection content or repeatedly project the projection content .

Images