JP4797750B2 - Camera and camera system - Google Patents

Description

  The present invention relates to a camera and a camera system.

  A camera that performs photographing and projection is known (see Patent Document 1).

JP 2005-250392 A JP 2005-236746 A

  According to Patent Document 1, since the photographing optical system and the projection optical system are disposed on the same surface of the housing, there is a possibility that the projected light beam is scattered when the photographing optical system protrudes from the housing surface.

The camera according to the present invention is arranged to project from the front surface of the camera housing, has a photographing optical system for guiding a subject image to the image sensor, and a projection optical system, and projects the optical image in the front direction of the housing. And a moving means for moving the projection means between a use position and a storage position, and the use position is such that an optical image projected by the projection means is not shifted by the photographing optical system. The projection optical system is further away from the photographing optical system than the storage position.

  According to the present invention, it is possible to provide a camera and a camera system in which the projected light beam is not lost even when the photographing optical system protrudes from the housing surface.

The best mode for carrying out the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is an oblique view of an electronic camera with a projector (hereinafter referred to as a PJ built-in electronic camera) according to a first embodiment of the present invention. In FIG. 1, a photographing lens 11, an illumination light window 12, and a projector projection window 13 are provided in front of the PJ built-in electronic camera 10. On the top surface of the PJ built-in electronic camera 10, a release button 14, a zoom switch 16, a mode switching dial 15, and a main switch 22 are provided.

  FIG. 2 is a view of the PJ built-in electronic camera 10 of FIG. In FIG. 2, a liquid crystal display 17, an electronic viewfinder 18, an operation member 19, and a speaker hole 20 are provided on the back surface of the PJ built-in electronic camera 10.

  The PJ built-in electronic camera 10 projects projection information such as an image by a built-in projection unit (projector) toward a screen or the like disposed on the front side of the PJ built-in electronic camera 10 in a state of being placed on a desk or the like. Projecting from the projection window 13. The PJ built-in electronic camera 10 has a built-in speaker 21 on the back side of the speaker hole 20 and reproduces information such as sound toward the back of the electronic camera 10.

  The mode switching dial 15 is a mode switching operation member for switching the operation mode of the PJ built-in electronic camera 10 such as a photographing mode and a projection mode. The photographing mode is an operation mode in which a subject image is photographed and the photographed image data is saved as an image file in a recording medium constituted by a memory card or the like. In the case of still image shooting, a still image file is generated, and in the case of moving image shooting, a moving image file is generated. The shooting start instruction corresponds to an operation signal output in response to the pressing operation of the release button 14. The electronic camera 10 with a built-in PJ has a built-in lighting device that illuminates a subject during shooting. The photographing auxiliary light from the illumination device is emitted from the illumination light window 12 toward the front of the PJ built-in electronic camera 10. In the photographing mode, the voice is collected by the microphone built in the back side of the speaker hole 20 together with the speaker 21, and the voice data can be stored in a recording medium.

  The projection mode is an operation mode in which captured image data is read from a recording medium (for example, a memory card 150 or an internal memory described later), and a reproduced image based on the image data is projected from the projector projection window 13 by the projection unit. is there. When audio data is recorded, audio reproduction is also performed from the speaker 21. As the projection source, in addition to the data recorded on the recording medium, data recorded in the internal memory, data supplied from the outside of the PJ built-in electronic camera 10, and the like can be selected. The projection unit projects a reproduced image based on data selected from the projection source.

  The PJ built-in electronic camera 10 is provided with a retracting mechanism for retracting the lens barrel P in the camera housing so that the light projected from the projector projection window 13 is not scattered by the lens barrel P of the photographing lens 11. It has been.

  FIG. 3 is a block diagram illustrating a circuit configuration of the electronic camera 10 with a built-in PJ. In FIG. 3, an electronic camera 10 with a built-in PJ includes a projection unit 220, an imaging unit 120, a CPU 101, a memory 102, an operation member 103, a liquid crystal display 104, a speaker 105, a microphone 106, and an external interface (I / F) 107 and a power supply circuit 108. A memory card 150 is mounted in a card slot (not shown). The memory card 150 is detachable. A battery 109 is mounted on a battery holder (not shown).

  The CPU 101 sends a control signal to each unit of the PJ built-in electronic camera 10 by performing a predetermined calculation using a signal input from each unit constituting the PJ built-in electronic camera 10 based on the control program. Controls the shooting and projection operations. The control program is stored in a nonvolatile memory (not shown) in the CPU 101.

  The memory 102 is used as a working memory for the CPU 101. The operation member 103 corresponds to the main switch 22, the release button 14, the zoom switch 16, the mode switching dial 15, and the operation member 19 in FIG. 2, and is turned on / off in conjunction with the pressing operation of the release button 14. Includes half-push switch and full-push switch (not shown). The half-press switch is turned on when the pressing amount of the release button 14 reaches the half-pressing operation amount, and the full-pressing switch is turned on when the pressing amount of the release button 14 reaches a full-pressing operation amount larger than the half-pressing operation amount. To do. The operation member 103 sends an operation signal corresponding to each operation content to the CPU 101.

  The memory card 150 is configured by a non-volatile memory such as a flash memory, and can write, save, and read data of an image captured by the imaging unit 120 according to an instruction from the CPU 101.

  The attitude sensor 111 detects the attitude of the PJ built-in electronic camera 10 and sends a detection signal to the CPU 101. Based on the posture detection signal, the CPU 101 determines whether the horizontal position shooting or the vertical position shooting is performed in the shooting mode. In the projection mode, the CPU 101 determines whether the mounting posture of the PJ built-in electronic camera 10 is within a predetermined tilt range. judge.

  The photometric device 112 calculates the luminance of the subject using the detection signal from the photometric sensor, and sends the luminance information to the CPU 101. Based on the luminance information, the CPU 101 performs an exposure calculation in the shooting mode to determine a control exposure. In the projection mode, whether or not projection is appropriate is determined based on the luminance information.

  The power supply circuit 108 is turned on / off in response to an instruction from the CPU 101, converts the voltage from the battery 109 into a voltage required by each circuit when the power is turned on, and supplies power to each unit of the PJ built-in electronic camera 10. Note that the CPU 101 is configured to be energized whenever the battery 109 is loaded, regardless of whether the power supply circuit 108 is on or off.

  The liquid crystal display 104 (corresponding to reference numeral 17 in FIG. 2) displays information such as images and texts according to instructions from the CPU 101. The text information is an operation state of the electronic camera 10 with a built-in PJ, an operation menu and the like. The speaker 105 (corresponding to reference numeral 21 in FIG. 2) reproduces sound based on sound data output from the CPU 101.

  The microphone 106 converts the collected sound into an electrical signal and sends it to the CPU 101. The audio signal data is recorded on the memory card 150 in the shooting mode.

  An external interface (I / F) 107 displays a video signal as an image in order to display a playback image based on a video signal transmitted from an external device such as a video camera on the liquid crystal display 104 or project the image on the projection unit 220. The data is converted into data, and the converted image data is sent to the CPU 101. The external interface (I / F) 107 converts an audio signal transmitted from an external device into audio data for reproduction from the speaker 105, and sends the converted audio data to the CPU 101.

  The temperature sensor 113 is disposed near the projection unit 220 and sends a temperature detection signal to the CPU 101. CPU 101 calculates the in-machine temperature near projection unit 220 based on the temperature detection signal.

<Imaging unit>
The imaging unit 120 includes a photographing optical system 121 (corresponding to reference numeral 11 in FIG. 1), an imaging element 122, a lens driving unit 123, a photographing control circuit 124, and a lens barrel retracting mechanism 125. As the image sensor 122, a CCD, a CMOS image sensor, or the like is used. The imaging control circuit 124 drives and controls the image sensor 122 and the lens driving unit 123 according to an instruction from the CPU 101 and performs predetermined image processing on the image signal (accumulated charge signal) output from the image sensor 122. Image processing includes color adjustment processing, contour enhancement, gamma correction processing, and the like.

  The imaging optical system 121 forms a subject image on the imaging surface of the imaging element 122. The imaging control circuit 124 causes the imaging device 122 to start imaging in response to an imaging start instruction, reads the accumulated charge signal from the imaging device 122 after the imaging is completed, sends the image processing to the CPU 101 as image data.

  The lens driving unit 123 drives a focus lens (not shown) constituting the photographing optical system 121 forward and backward in the optical axis direction based on the focus adjustment signal output from the photographing control circuit 124. The lens driving unit 123 drives the zoom lens (not shown) constituting the photographing optical system 121 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 124. To do. The focus adjustment amount and the zoom adjustment amount are instructed from the CPU 101 to the photographing control circuit 124.

<Camera focus adjustment>
The imaging unit 120 performs focus adjustment by the photographing optical system 121 by shifting the focus lens of the photographing optical system 121 in the optical axis direction. When performing autofocus adjustment, the CPU 101 performs integrated values (so-called focus evaluation values) of high frequency components for image signals corresponding to a focus detection area (for example, the center of the shooting screen) among image signals captured by the image sensor 122. Instructs the imaging control circuit 124 to adjust the focus so as to maximize the image quality. The position of the focus lens that maximizes the focus evaluation value is an in-focus position that eliminates blurring of the edge of the subject image captured by the image sensor 122 and maximizes the contrast of the image.

<Camera zoom adjustment>
The imaging unit 120 performs optical zoom adjustment by the photographing optical system 121 by shifting the zoom lens of the photographing optical system 121 in the optical axis direction. The CPU 101 sends a zoom adjustment signal to the photographing control circuit 124 in accordance with the operation signal from the zoom switch 16. For example, the CPU 101 sends a zoom adjustment signal to zoom up when an operation signal is input from the zoom switch 16, and zooms down when the operation signal is input from the zoom switch 16. Send an adjustment signal. The zoom switch 16 is configured to alternatively output two different operation signals.

  Further, the imaging control circuit 124 sends an instruction to the lens barrel retracting mechanism 125 in response to an instruction from the CPU 101, and the lens barrel P (FIG. 1) of the imaging optical system 121 is retracted into the housing of the PJ built-in electronic camera 10. The lens barrel P retracted in the housing is extended to the state at the time of photographing (FIG. 1).

<Projection unit>
The projection unit 220 includes a projection optical system 221, a liquid crystal panel 222, an LED (light emitting diode) light source 223, a lens driving unit 224, and a projection control circuit 225. The projection control circuit 225 supplies a drive current to the LED light source 223 in accordance with a projection instruction output from the CPU 101. The LED light source 223 illuminates the liquid crystal panel 222 with brightness according to the supply current.

  The projection control circuit 225 further generates a liquid crystal panel drive signal according to the image data sent from the CPU 101, and drives the liquid crystal panel 222 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. In this way, the liquid crystal panel 222 generates an optical image by modulating the light from the LED light source 223 in accordance with the image signal.

  The projection optical system 221 projects the light image emitted from the liquid crystal panel 222 onto a screen or the like. Based on the offset adjustment signal output from the projection control circuit 225, the lens driving unit 224 drives the projection optical system 221 forward and backward in a direction orthogonal to the optical axis. Further, the lens driving unit 224 drives a focus lens (not shown) constituting the projection optical system 221 to advance and retreat in the optical axis direction based on the focus adjustment signal output from the projection control circuit 225. The lens driving unit 224 further drives a zoom lens (not shown) constituting the projection optical system 221 forward and backward in the optical axis direction based on the zoom adjustment signal output from the projection control circuit 225. An offset adjustment amount, a focus adjustment amount, and a zoom adjustment amount are instructed from the CPU 101 to the projection control circuit 225.

<Offset of projected image>
By shifting the projection optical system 221 in a direction orthogonal to the optical axis, the emission direction of the light beam emitted from the projector projection window 13 (FIG. 1) changes, and the projection image is offset-adjusted. In addition to shifting the projection optical system 221, the offset of the projected image may be performed by shifting the liquid crystal panel 222 and the LED light source 223 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 optical system 221 and the liquid crystal panel 222 in a direction perpendicular to the optical axis.

<Keystone correction of projected image>
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 the trapezoidal shape to the 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 controls projection of the image data after the keystone correction processing. Send to circuit 225.

<Focus adjustment of projected image>
The projection unit 220 performs focus adjustment by the projection optical system 221 by shifting the focus lens of the projection optical system 221 in the optical axis direction. When performing manual focus adjustment, the CPU 101 sends a focus adjustment signal to the projection control circuit 225 in accordance with an operation signal from the operation member 103.

  Auto-focusing of the projection unit 220 is performed by imaging a projection image with the imaging unit 120. When performing autofocus adjustment, the CPU 101 integrates high frequency components (so-called focus evaluation value) for an image signal corresponding to a focus detection area (for example, the center of the shooting screen) among the image signals captured by the imaging unit 120. A focus adjustment signal is sent to the projection control circuit 225 so as to maximize. The position of the focus lens that maximizes the focus evaluation value is a focus adjustment position that eliminates blurring of the edge of the projected image that is the subject of the imaging unit 120 and maximizes the contrast of the projected image.

<Adjusting the zoom of the projected image>
The projection unit 220 performs zoom adjustment by the projection optical system 221 by shifting the zoom lens of the projection optical system 221 in the optical axis direction. The CPU 101 sends a zoom adjustment signal to the projection control circuit 225 in accordance with the operation signal from the operation member 103.

<Projection source: source>
The projection unit 220 projects and reproduces content from any of the following “source 1” to “source 4” according to an instruction from the CPU 101. Each time the source switching operation signal is input from the operation member 103, the CPU 101 displays the projection images of “source 1” to “source 3” as “source 1” → “source 2” → “source 3” → “source 1”. Image data corresponding to each image is sent to the projection unit 220 so as to be cyclically switched in the order of. However, when the memory card 150 is not attached to the PJ built-in electronic camera 10, “source 1” is skipped. If no external device is connected to the external interface (I / F) 107, “source 3” is skipped.

  Further, when a switching operation signal from the operation member 103 to the chart projection is input, the CPU 101 sends image data corresponding to the following “source 4” to the projection unit 220.

Source 1: Reproduced image source by data read from memory card 150 2: Reproduced image source by image data recorded in internal memory (non-volatile memory in CPU 101, etc.) 3: Input from external interface (I / F) 107 Reproduced image source 4 based on recorded data: a chart for focus adjustment, for example, an image composed of a striped pattern of black lines on a white background

  When the CPU 101 projects an image corresponding to the “source 1” or “source 2”, the image data having the newest recording date and time (the last recorded image data taken) is stored in the memory card 150. (Or the internal memory) is read in order, and the read image data is sent to the projection unit 220.

<Projection module>
Details of the optical system arrangement of the projection unit 220 will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view (FIG. 4A) of the optical system of the projection unit 220 built in the PJ built-in electronic camera 10 and a left side view thereof (FIG. 4B). FIG. 5 is a front view (FIG. 5A) of the optical system of FIG. 4A viewed from the front and a left side view thereof (FIG. 5B).

  The optical system of the projection unit 220 is configured as a quadrangular prism-shaped module (hereinafter referred to as a projection module) whose bottom surface is a substantially square having a side of about 10 mm. The projection module is disposed with its longitudinal direction being transverse, and a cooling block 230 configured in a substantially cubic shape with one side of about 10 mm is joined to the left side surface thereof. In FIGS. 4A and 5A, the size of the rectangular column in the longitudinal direction is shown longer than the actual size in order to easily illustrate the internal configuration.

  The projection module includes an LED 223, a mirror M1, a condensing optical system 226, a polarizing plate 227, a PBS (polarization beam splitter) block 228, a liquid crystal panel 222, a projection optical system 221, and an illumination optical system 229. Is included.

  Of the above members, members other than the projection optical system 221 and the illumination optical system 229 are integrated on a thin metal plate. Specifically, the LED 223 is mounted on a rectangular aluminum substrate 251 (on a pattern formed on the insulating layer) that forms one plane in the longitudinal direction of the quadrangular prism shape, and the light from the LED 223 is bent to the right. A mirror M1 and a mirror support member (not shown) that supports the mirror M1 are disposed on the substrate 251. The mirror support member is bonded to the substrate 251 and supports the mirror M1 so as to be movable between a position indicated by a broken line and a position indicated by a one-dot chain line. The mirror M1 is driven using an actuator (not shown) such as a piezoelectric element.

  On the substrate 251, a condensing optical system 226 and a PBS block 228 are further bonded to the right side of the mirror M1. The PBS block 228 is a polarization beam splitter in which a polarization separation unit 228a having an angle of 45 degrees with respect to an incident optical axis is sandwiched between two triangular prisms. The surface 228b of the PBS block 228 bonded to the substrate 251 is subjected to a non-reflective process such as a black process, for example.

  A polarizing plate 227 is disposed on the light condensing optical system side (left side) surface of the PBS block 228, and a liquid crystal panel 222 composed of a reflective liquid crystal element (LCOS) is disposed on the right side surface of the PBS block 228. . Here, the cover glass on the PBS block side (left side) surface where light enters and exits is omitted from the liquid crystal panel 222 and is directly bonded to the right side surface of the PBS block 228 (see FIG. 39A). When the cover glass is not omitted, as shown in FIG. 39 (b), the cover glass surface is fixed so that the right side surface of the PBS block 228 is in close contact.

  A lid member 252 is formed by bending an aluminum plate into a sheet so as to cover each member on the substrate 251. The lid member 252 is provided with an opening 252a and an opening 252b. A projection optical system 221 is provided in the opening 252a, and an illumination optical system 229 is provided in the opening 252b.

  Although the example which comprises the said opening in quadrilateral shape was illustrated, you may comprise an opening in circular shape. In the case of providing a circular opening, if the opening cross section is threaded and the lens barrel of the projection optical system 221 is screwed into the screw processing, the focus adjustment by the projection optical system 221 is performed by rotating the lens barrel. Can also be performed manually.

  The cooling block 230 includes a heat radiating member 232 formed so that a part of a cubic aluminum block has a substantially fan-shaped cross section, and a cooling fan 231. The heat dissipation member 232 is surface-bonded to the substrate 251 so as to improve heat conduction from the substrate 251. Specifically, a filler having high thermal conductivity is filled between the heat radiation member 232 and the substrate 251 or a high thermal conductivity sheet is sandwiched between them.

  The cooling fan 231 is configured by, for example, an intake fan, and intakes air from a vent hole 23 provided on the front surface of the PJ built-in electronic camera 10. The intake air flow is cooled along the curved surface of the heat radiating member 232, cools the heat radiating member 232, changes the course upward, and is exhausted from the vent hole 24 provided on the upper surface of the PJ built-in electronic camera 10.

  The substrate 251 is configured to radiate heat to other members in addition to the heat radiation to the cooling block 230. For example, between the substrate 251 (particularly in the vicinity of the heat dissipation member 232 and the LED 223) and the metal back panel member (not shown) of the liquid crystal display 104 (FIG. 3), and the lens driving included in the substrate 251 and the lens driving unit 123. The block member (not shown) of the motor DC motor is connected to each other by a heat conductive sheet or the like so as to conduct heat mutually.

  In the projection module having the above configuration, a drive current is supplied to the LED 223 on the substrate 251 via a harness and a pattern (not shown). The mirror M1 is moved to the broken line position (FIG. 4) by the mirror support member in the projection mode, and moved to the alternate long and short dash line position (FIG. 4) in the photographing mode. The movement of the mirror M1 is performed according to an instruction from the projection control circuit 225.

  The LED 223 emits light with brightness according to the drive current downward in FIG. In the projection mode, the LED light is bent by the mirror M1 and condensed by the condensing optical system 226. The condensing optical system 226 converts the LED light into substantially parallel light and enters the polarizing plate 227. The polarizing plate 227 converts (or extracts) the incident light into linearly polarized light, and emits the converted (or extracted) polarized light toward the PBS block 228.

  A polarized light beam (for example, P-polarized light) incident on the PBS block 228 passes through the PBS block 228 and illuminates the liquid crystal panel 222. The liquid crystal panel 222 includes a plurality of pixels on which red, green, and blue filters are formed, and generates a color image. When light that passes through the liquid crystal layer of the liquid crystal panel 222 enters the liquid crystal panel 222, the light travels rightward through the liquid crystal layer, is reflected by the reflective surface of the liquid crystal panel 222, and then travels leftward through the liquid crystal layer. The light is emitted from the panel 222 and is incident again on the PBS block 228. Since the liquid crystal layer to which the voltage is applied functions as a phase plate, the light incident again on the PBS block 228 is a mixed light of modulated light that is S-polarized light and unmodulated light that is P-polarized light. The PBS block 228 reflects (folds) only the modulated light, which is the S-polarized component, of the re-incident light beam by the polarization separation unit 228a, and emits the light as projection light toward the lower projection optical system 221. The arrangement position of the projection optical system 221 corresponds to the projector projection window 13 (FIG. 1).

  In one photographing mode, the LED light travels downward without being bent by the mirror M1 and enters the illumination optical system 229. The illumination optical system 229 emits LED light at an angle of view that is optimal for photographing auxiliary light. The arrangement position of the illumination optical system 229 corresponds to the illumination light window 12 (FIG. 1).

  Since the present invention is characterized by the operation when the PJ built-in electronic camera 10 is switched to the projection mode, the description will focus on the control performed by the CPU 101 when the projection mode is activated.

  FIG. 6 is a flowchart for explaining the flow of processing by a program executed by the CPU 101 of the PJ built-in electronic camera 10 in the projection mode. 6 is performed when the operation signal for instructing the CPU 101 to switch to the projection mode is input from the mode switching dial 15 when the power is turned on, or when the mode switching dial 15 is operated in the projection mode. Starts when an on operation is performed.

  In step S1 of FIG. 6, the CPU 101 instructs the imaging unit to turn off and instructs the liquid crystal display 104 to turn off the display, and then proceeds to step S2. Thereby, the imaging operation is stopped, and the display by the liquid crystal display 104 is stopped.

  In step S2, the CPU 101 determines whether or not the lens barrel P is in the retracted state. When the CPU 101 receives a signal indicating the collapsed state from the imaging control circuit 124, the CPU 101 makes a positive determination in step S2 and proceeds to step S3B. When the CPU 101 receives a signal indicating the non-collapsed state, the CPU 101 makes a negative determination in step S2 and proceeds to step S3. move on. In step S3, the CPU 101 sends a collapsible command (instruction) to the imaging control circuit 124 and proceeds to step S3B.

  In step S3B, the CPU 101 performs a check process and proceeds to step S4. The check process determines whether the brightness of the room and the posture of the electronic camera 10 with a built-in PJ are suitable for projection, and details thereof will be described later.

  In step S <b> 4, the CPU 101 instructs the projection control circuit 225 to start projection, and changes the functions of the release button 14 and the zoom switch 16 disposed on the upper surface of the electronic camera with projector 10 among the operation members 103. The process proceeds to step S5. In response to the projection start instruction, the LED light source 223 is turned on in the projection unit 220, the driving of the liquid crystal panel 222 is started, and the cooling fan 231 is started. Note that the functions of the release button 14 and the zoom switch 16 may be changed first, and the projection may be started in response to the full pressing operation of the release button 14.

  After step S4, the release button 14 and the zoom switch 16 are handled as operation members having functions different from those in the shooting mode until the function change of the operation member 103 is canceled in step S11 described later. In the case of the release button 14, it is not an operation member for instructing shooting, but auto-focus adjustment of the projection image is started, the chart projection image for focus adjustment of the “source 4” is switched, or the projection image is rotated. It is handled as an operation member for temporarily stopping the projection operation. The zoom switch 16 is handled as an operation member for zoom adjustment of the projection optical system 221 (projected image), not zoom adjustment of the photographing optical system 121.

  In addition, after step S4 for starting projection by the projection unit 220, the same check process as step S3B is performed every predetermined time as a timer interrupt process (except during the process of step S12 described later). .

  In the present embodiment, the projection source is set to “source 1” as a default setting in the projection mode. In step S5, the CPU 101 reads the image data with the newest recording date from the memory card 150, sends the read image data to the projection unit 220, and proceeds to step S6. As a result, a reproduction image based on the image data sent from the CPU 101 to the projection unit 220 is projected. Note that, when audio data is stored in association with the data file of the image being projected, the CPU 101 reproduces audio from the audio data from the speaker 105. The image data may be mixed like still image-moving image-still image-still image.

  In step S6, the CPU 101 determines whether an operation by the user has been performed. When an operation signal is input from the operation member 103 (FIG. 3), the CPU 101 makes an affirmative determination in step S6 and proceeds to step S7. If no operation signal is input from the operation member 103, the CPU 101 makes a negative determination in step S6. Proceed to S9.

  In step S <b> 9, the CPU 101 determines whether or not the image data to be sent to the projection unit 220 is an image corresponding to the “source 1” or “source 2” (that is, a captured recording image). If the image data to be sent to the projection unit 220 is a recorded image, the CPU 101 makes an affirmative decision in step S9 and proceeds to step S10. The image data to be sent to the projection unit 220 corresponds to the image corresponding to the “source 3” (that is, , A non-recorded image), a negative determination is made in step S9, and the process returns to step S6. Even in the case of the focus adjustment chart corresponding to the “source 4”, a negative determination is made in step S9.

  In step S10, the CPU 101 determines whether the time is up. When the built-in timer measures a predetermined display time (for example, 5 seconds), CPU 101 makes an affirmative decision in step S10 and returns to step S5. If the predetermined time has not been reached, the CPU 101 makes a negative decision in step S10 and returns to step S6. . Note that the time is the time elapsed since the image data being projected was read.

  When returning from step S10 to step S5, a so-called slide show projection is performed. That is, an image based on the image data read from the memory card 150 (or the internal memory) is projected, and when the time is counted for 5 seconds, the next image data is read from the memory card 150 (or the internal memory), and the image being projected is updated later. Are sequentially updated to a projected image based on the image data read out from. Note that the projection time per image in the slide show projection is not limited to the above-mentioned 5 seconds, but can be appropriately changed.

  In addition to the above timing, when an operation signal indicating the right direction is output from an operation member (for example, the cross key type operation member 19 shown in FIG. 2), the next image data is stored in the memory card 150 (or internal memory). When the operation signal indicating the left direction is output from the operation member, the previous image data may be read from the memory card 150 (or the internal memory).

  In step S7, which proceeds after making an affirmative determination in step S6, the CPU 101 determines whether or not the operation by the user is a mode switching operation. If the input operation signal is a switching operation signal for switching to the photographing mode by the mode switching dial 15, the CPU 101 makes an affirmative decision in step S7 and proceeds to step S11. Further, the CPU 101 receives the input operation signal as a source switching operation signal from the release button 14 and the zoom switch 16 (for example, an operation signal from the zoom switch 16 and a half-press operation signal from the release button 14 are input simultaneously). If there is, a negative determination is made in step S7 and the process proceeds to step S8. Furthermore, when the input operation signal is an operation signal from the release button 14 or the zoom switch 16, the CPU 101 makes a negative determination in step S7 and proceeds to step 12. When proceeding to step S8, it is considered that source switching has been instructed, and when proceeding to step S12, it is regarded that projection adjustment has been instructed.

  In step S11, the CPU 101 instructs the projection control circuit 225 to end the projection, cancels the function change of the release button 14 and the zoom switch 16, and ends the processing in FIG. Thereby, the LED light source 223 is turned off in the projection unit 220, the driving of the liquid crystal panel 222 is stopped, and the cooling fan 231 is stopped.

  In step S <b> 8, every time the operation signal of the zoom switch 16 and the half-press operation signal from the release button 14 are input simultaneously, the CPU 101 transmits the image data to be sent to the projection unit 220 from “Source 1” → “Source 2”. ”→“ Source 3 ”→“ Source 1 ”... In this order and proceed to Step S9.

  In step S12, the CPU 101 performs projection adjustment processing and proceeds to step S9. Details of the projection adjustment processing will be described with reference to the flowchart shown in FIG. In step S51 in FIG. 7, the CPU 101 determines whether or not the operation member operated by the user is a zoom switch. If the input operation signal is an operation signal from the zoom switch 16, the CPU 101 makes a positive determination in step S51 and proceeds to step S52. If the input operation signal is not an operation signal from the zoom switch 16, the CPU 101 makes a negative determination in step S51 and proceeds to step S53. move on.

  In step S52, the CPU 101 performs an optical zoom process and returns to step S51. For example, when the zoom switch 16 is turned clockwise, the CPU 101 sends a zoom adjustment signal to the projection control circuit 225 so as to zoom up the projected image when the zoom switch 16 is turned clockwise, and the zoom switch 16 is turned counterclockwise. First, a zoom adjustment signal is sent to the projection control circuit 225 so as to zoom down the projected image.

  In step S53, the CPU 101 determines whether or not the release button 14 has been half-pressed by the user (that is, an operation signal has been output from the half-press switch). If the input operation signal is a half-press operation signal, the CPU 101 makes a positive determination in step S53 and proceeds to step S54. If not, the CPU 101 makes a negative determination in step S53 and proceeds to step S56.

  In step S54, the CPU 101 determines whether or not a long press has been performed. When the half-press operation signal is released within a predetermined time (for example, 3 seconds), the CPU 101 makes a negative determination in step S54 and proceeds to step S55. When the CPU 101 continues for a predetermined time or more, the CPU 101 makes an affirmative determination in step S54. Then, the process proceeds to step S59.

  A half-press operation signal by a half-press operation that is not a long press of the release button 14 corresponds to an autofocus (AF) instruction. In step S55, the CPU 101 starts AF processing and proceeds to step S55B. Specifically, the imaging control circuit 124 is instructed to turn on the imaging unit, and the focus adjustment signal is sent to the projection control circuit 225 so that the focus evaluation value obtained from the image signal captured by the imaging unit 120 is maximized. . The subject imaged by the imaging unit 120 is a projected image on the screen. Note that the focus lens of the photographing optical system 121 is moved to a predetermined position (for example, a position corresponding to a subject distance of 1 m from the PJ built-in electronic camera 10) during the AF processing in step S55. When the CPU 101 finishes the AF process, it instructs the photographing control circuit 124 to turn off the imaging unit, and returns the focus lens to the original position.

  In step S55B, the CPU 101 stores the contrast information acquired by the AF process in the memory 102, and returns to step S51. The contrast information is distance information to the screen. In the CPU 101, contrast information obtained when an image of the focus adjustment chart of “source 4” projected onto a screen 1 m away from the electronic camera 10 with a built-in PJ is stored in advance as reference data. The CPU 101 stores the acquired contrast information so that it can be compared with reference data in step S65 described later.

  A half-press operation signal generated by pressing the release button 14 half-pressed corresponds to a chart projection on / off switching instruction. In step S <b> 59, the CPU 101 determines whether or not the “source 4” focus adjustment chart is being projected. If the CPU 101 is projecting the chart image (the chart image data for focus adjustment has already been sent to the projection unit 220), the CPU 101 makes an affirmative decision in step S59 and proceeds to step S60. "" Is being projected, a negative determination is made in step S59 and the process proceeds to step S61.

  In step S60, the CPU 101 turns off the chart projection. Specifically, instead of the chart image, the image data that has been projected most recently so as to project the reproduced image of any of the above-mentioned “source 1” to “source 3” that was projected most recently before the chart projection. To the projection unit 220 and returns to step S51.

  In step S61, the CPU 101 turns on chart projection. Specifically, the chart image data is sent to the projection unit 220 so as to project the chart image of the “source 4” instead of the reproduced image of any of the “source 1” to “source 3”. Return to S51.

  In step S56, the CPU 101 determines whether or not the release button 14 has been fully pressed by the user (that is, an operation signal has been output from the full press switch). If the input operation signal is a full-press operation signal, the CPU 101 makes an affirmative determination in step S56 and proceeds to step S57. If not, the CPU 101 makes a negative determination in step S56 and proceeds to step S65.

  In step S57, the CPU 101 determines whether or not a long press has been performed. The CPU 101 makes a negative determination in step S57 when the full-press operation signal is released within a predetermined time (for example, 3 seconds), proceeds to step S58, and affirms the determination in step S57 if continued for a predetermined time or longer. Then, the process proceeds to step S62.

  A full-press operation signal by a full-press operation that is not a long press of the release button 14 corresponds to an instruction to rotate the projection image. In step S58, the CPU 101 rotates the projection image as follows and returns to step S51.

<Rotation of projected image>
The CPU 101 rotates the image data 90 degrees clockwise on the memory 102 and sends the image data after the rotation processing to the projection unit 220. In this case, the CPU 101 also performs a size conversion process according to the aspect ratio of the projected image so that the image after the rotation process falls within the projection range. For example, when the aspect ratio of the image data is a ratio of horizontal 4: vertical and the aspect ratio of the liquid crystal panel 222 is also expressed by a ratio of horizontal 4: vertical 3, the image after the rotation process is processed in the vertical direction. The data size is reduced so as to be represented by 3/4 pixels in each horizontal direction. As a result, an image that has been subjected to rotation processing and reduction processing so that the long side of the image data corresponds to the short side of the liquid crystal panel 222 is projected.

  The CPU 101 is configured to repeat the size conversion process and the rotation process every time a projection image rotation instruction is input. The size conversion processing includes reduction processing (reducing the long side of the image data to correspond to the short side of the liquid crystal panel 222) for reducing the number of pixels to 3/4 in the vertical and horizontal directions according to the aspect ratio, and 4/3 in each of the vertical and horizontal pixels. The enlargement process (the long side of the image data corresponds to the long side of the liquid crystal panel 222) is alternately performed. For example, when the rotation instruction of the projection image is continuously performed four times by the above rotation processing, the projection image rotates once in the clockwise direction, and the projection image rotation instruction is input as the size of the projection image. Return to the same size as before. The rotation direction of the projection image may be configured to be counterclockwise.

  The full-press operation signal generated by the full-press and long-press operation of the release button 14 corresponds to an instruction to switch the projection operation temporarily. In step S62, the CPU 101 determines whether or not the projection operation is being paused. When the projection operation is temporarily stopped in response to the long press operation, the CPU 101 makes an affirmative decision in step S62 and proceeds to step S63. If the projection is in progress, the CPU 101 makes a negative decision in step S62 and proceeds to step S64.

  In step S63, the CPU 101 releases the temporary stop. Specifically, the CPU 101 sends a command to the projection control circuit 225, resumes energization of the LED light source 223 and the liquid crystal panel 222, and returns to step S51. Thereby, the projection of the optical image from the projection unit 220 is resumed.

  During the pause, when the projection content is “source 1”, the information of the memory card 150 and the data read from the memory card 150 are stored on the memory 102. Similarly, when the projection content is “source 3”, communication between the external interface 107 and the external device is continued, and data received by the external interface 107 is stored in the memory 102. By saving the data on the memory 102 during the pause as described above, the projection can be resumed immediately using the data saved in the memory 102 when the pause is released.

  In step S64, the CPU 101 temporarily stops the projection operation. Specifically, the CPU 101 sends a command to the projection control circuit 225, stops energization of the LED light source 223 and the liquid crystal panel 222, and returns to step S51. Thereby, the optical image from the projection unit 220 is not projected.

  In step S65, the CPU 101 determines whether the distance is OK. The CPU 101 compares the contrast information stored in step S55B with the reference data described above. If the contrast difference between the two is within a predetermined difference, the CPU 101 determines that the distance is OK, ends the processing in FIG. 7, and ends the processing in FIG. Proceed to S9. The contrast difference is minimized when the distance to the screen is 1 m and the focus of the projection optical system 221 is appropriately adjusted. When the distance to the screen is not 1 m, the contrast difference becomes large. If the contrast difference exceeds the predetermined difference, the CPU 101 makes a negative determination in step S65 and proceeds to step S66.

  In step S66, the CPU 101 sends an instruction to the projection control circuit 225, superimposes a message on the projection image, displays a similar message on the liquid crystal display 104, and ends the processing in FIG. The message content is, for example, “Please check the distance to the screen.” The user is prompted to confirm the installation of the screen.

  The AF process in step S55 described above will be further described. Since the PJ built-in electronic camera 10 performs autofocus adjustment by the projection optical system 221 using a focus detection method called a hill-climbing method, the focus lens (projection optical system 221) is projected while projecting from the projection unit 220 toward the screen. Driven back and forth in the optical axis direction, the projected image on the screen is repeatedly captured by the imaging unit 120.

  Therefore, the projection control circuit 225 drives both the LED light source 223 and the focus lens (projection optical system 221) during the AF process. The focus lens is driven by pulse driving a DC motor (not shown) in the lens driving unit 224. The current supplied to the DC motor for pulse driving is, for example, a pulsed current having a frequency of 60 Hz and a duty of 50%.

  On the other hand, the current supplied to the LED light source 223 is also a pulsed current having a frequency of 60 Hz and a duty of 50% during the driving of the DC motor. The projection control circuit 225 shifts both phases by 180 degrees so that the peak values of the drive current to the DC motor and the drive current to the LED light source 223 do not overlap. This is because the peak current consumption in the projection unit 220 is suppressed and the load on the power supply circuit 108 (in other words, the battery 109) is reduced.

  The projection image blinks by driving the LED light source 223 in a pulsed manner. However, since the blinking frequency is 60 Hz, the user who observes the projection image does not feel discomfort such as flicker. The projection control circuit 225 returns the current supplied to the LED light source 223 to a direct current during a period in which the focus motor is not driven (a pulse current is not supplied to the DC motor).

  The same operation is performed when both the LED light source 223 and the focus lens of the imaging unit 120 are driven. That is, when the focus lens of the photographing optical system 121 is moved to a predetermined position during the AF processing in step S55, the photographing control circuit 124 includes a DC motor (in a lens driving unit 123 that drives the focus lens (the photographing optical system 121)). A pulsed current having a frequency of 60 Hz and a duty of 50% is supplied to (not shown). The CPU 101 controls the photographing control circuit 124 and the projection control circuit 224 so that the drive current to the DC motor in the imaging unit 120 and the peak value of the drive current to the LED light source 223 do not overlap.

  Details of the check process will be described with reference to a flowchart shown in FIG. In step S81 of FIG. 8, the CPU 101 detects ambient brightness based on the luminance information from the photometric device 112, and proceeds to step S82.

  In step S82, the CPU 101 determines whether the brightness is equal to or less than a predetermined value. If the brightness is equal to or less than a predetermined value (e.g., equivalent to 1/3 of the brightness at the maximum projection brightness by the projection unit 220), the CPU 101 makes a positive determination in step S82 and proceeds to step S83, where the brightness is the predetermined value. If it exceeds, a negative determination is made in step S82 and the process proceeds to step S87. The process proceeds to step S87 when the surroundings are too bright and are not suitable for projection.

  In step S83, the CPU 101 determines whether or not the posture is OK. The CPU 101 determines that the mounting posture of the electronic camera 10 with a built-in PJ based on the detection signal from the posture sensor 111 is within a predetermined tilt range (for example, ± 10 degrees for both front and rear, left and right with respect to the horizontal direction). If it is constantly changing (carried), step S83 is affirmed and the process proceeds to step S84. If the detected posture exceeds the predetermined inclination range, step S83 is determined to be negative and the process proceeds to step S87. . When the process proceeds to step S87, there is a possibility that the observer of the projected image may be uncomfortable.

  In step S84, the CPU 101 determines whether or not the temperature is OK. When the in-machine temperature near the projection unit 220 based on the temperature detection signal from the temperature sensor 113 is equal to or lower than a predetermined temperature (for example, 60 ° C.), the CPU 101 makes an affirmative determination in step S84 and proceeds to step S85. When it exceeds, negative determination is made in step S84, and the process proceeds to step S92. The process proceeds to step S92 when the heat radiation of the projection unit 220 is not properly performed.

  In step S85, the CPU 101 determines whether projection is stopped. The CPU 101 makes an affirmative decision in step S85 when the projection of the optical image has been stopped in step S88, which will be described later, and proceeds to step S86. If an optical image is being projected, the CPU 101 makes a negative decision in step S85, and FIG. The process ends (return to FIG. 6). Note that the projection stop is a stop in step S88, and does not include a temporary stop (step S64 in FIG. 7) corresponding to the long press operation of the full-press switch. Also, a negative determination is made in step S85 even before the start of projection.

  In step S86, the CPU 101 resumes the projection operation. Specifically, similarly to the above-described temporary suspension cancellation (step S63 in FIG. 7), the energization of the LED light source 223 and the liquid crystal panel 222 is resumed, and the processing in FIG. 8 is terminated (return to FIG. 6). Thereby, the projection of the optical image from the projection unit 220 is automatically resumed.

  In step S87, in which the determination is negative after step S82 or step S83, the CPU 101 determines whether projection is in progress. When the light image is being projected from the projection unit 220, the CPU 101 makes a positive determination in step S87 and proceeds to step S88. When the light image is not projected, the CPU 101 makes a negative determination in step S87 and proceeds to step S89.

  In step S88, the CPU 101 stops the projection operation. Specifically, similarly to the above-described temporary stop (step S64 in FIG. 7), the power supply to the LED light source 223 and the liquid crystal panel 222 is stopped, and the process proceeds to step S90. Thereby, the optical image is not projected from the projection unit 220.

  In step S90, the CPU 101 displays a message on the liquid crystal display 104 and ends the process of FIG. 8 (returns to FIG. 6). The message content is, for example, “Projection has been paused”. Further, if the determination in step S82 is negative, a message such as “It is too bright”, and if the determination in step S83 is negative, a message such as “camera is tilted” may be added to prompt the user to take action. .

  In step S89 which proceeds after making a negative determination in step S87, the CPU 101 determines whether or not the projection is started. If the CPU 101 has not yet started projection in step S4 (FIG. 4), the determination in step S89 is affirmative and the process proceeds to step S93. If the projection has been started, the determination in step S89 is negative and the process proceeds to step S91.

  In step S91, the CPU 101 determines whether or not a predetermined time has elapsed after stopping the projection. The CPU 101 makes a positive determination in step S91 when a predetermined time (for example, 3 minutes) has elapsed since the projection stop in step S88, and proceeds to step S92. If the predetermined time has not elapsed, the CPU 101 makes a negative determination in step S91. The process according to FIG. 8 ends (returns to FIG. 6).

  In step S92, the CPU 101 displays a message on the liquid crystal display 104 and ends the projection processing (FIGS. 6 and 8). The message content is, for example, “Projection finished”. Further, if the determination in step S82 is negative, “it is too bright”, if the determination in step S83 is negative, “the camera is tilted”, and if the determination in step S84 is negative, “heat dissipation”. Please add a message such as "Please do so" to prompt the user to take action. The termination in step S92 is a power-off in which energization from the power supply circuit 108 to each unit is terminated while leaving a message displayed on the liquid crystal display 104. The CPU 101 after the power-off starts again the process of FIG. 6 when an operation signal is input from the main switch 22.

  In step S93, which proceeds after making an affirmative decision in step S89, the CPU 101 displays a message on the liquid crystal display 104, and ends the process of FIG. 8 (returns to FIG. 6). The message content is, for example, “Please prepare for projection”.

According to the first embodiment described above, the following operational effects can be obtained.
(1) Since the members (the LED light source 223, the cooling block 230, and the air holes 24) that raise the temperature are arranged at the upper center of the body of the electronic camera 10 with a built-in PJ, the configuration is such that the user cannot easily touch the temperature-rising portion. it can.

(2) Since the LED light source 223 is mounted on the rectangular thin plate substrate 251, workability is improved as compared with the case of mounting on a bent substrate.

(3) Since the cooling block 230 is disposed at the end of the camera body, intake and exhaust by the fan 231 can be performed efficiently.

(4) Since the heat radiation member 232 is provided with a curved surface and the intake air flow is changed along the curved surface while cooling the heat radiation member 232, the airflow whose temperature has been increased by heat exchange is not retained. The air can be discharged from the vent 24 on the upper surface of the body.

(5) In addition to conducting heat generated in the substrate 251 to the cooling block 230, heat conduction is also conducted to the metal back panel member of the liquid crystal display 104 (FIG. 3) and the block member of the lens driving DC motor. Because it did so, it can radiate heat efficiently.

(6) Since the LED light source 223 is configured to be used for both the photographing auxiliary light and the projection light, the cost can be reduced as compared with the case where the LED light sources are provided separately.

(7) Since the photographing auxiliary light is emitted without passing through the PBS block 228, the loss is less than that through the PBS block 228, and the guide number can be increased.

(8) Since the liquid crystal panel 222 is directly bonded to the PBS block, the cover glass of the liquid crystal panel 222 can be omitted, and an effect can be obtained in miniaturization and simplification of the structure. In addition, there is no air layer between the two by direct bonding, and reflection (usually about 4%) occurring at the interface between the air layer and the glass material (PBS) can be suppressed without applying an anti-reflection AR coat. it can. As a result, the loss of projection light is reduced and a bright projected image is obtained. Furthermore, it is only necessary to press the opposing surfaces at the time of direct joining, and there is no need to adjust the distance between the opposing surfaces required when an air layer is interposed, and the assembly man-hour can be reduced. In addition, since the liquid crystal panel 222 is a single plate type color image provided with a color filter, it does not require strong bonding as compared with a so-called three-plate type and can be easily assembled.

(9) Since the non-reflective process is performed on the surface 228b of the PBS block, a high-quality projected image can be obtained while suppressing stray light.

(10) If the brightness of the projection environment is brighter than the predetermined value (No in step S82), the projection is stopped if the projection is in progress (step S88). Therefore, in a bright place that is not suitable for observing the projection image. It is possible to prevent unnecessary projection.

(11) When the mounting posture of the PJ built-in electronic camera 10 exceeds the predetermined tilt range (No at Step S83), the projection is stopped when the projection is in progress (Step S88). It is possible to prevent unnecessary projection when the observer tilts and gives an unpleasant feeling to the observer, or when the projection light is scattered on a mounting plane such as a desk.

(12) Since the message is displayed on the liquid crystal display 104 after the projection is stopped (step S88), the user can be prompted to deal with it.

(13) Since the projection is automatically resumed when the predetermined brightness and the predetermined mounting posture are reached within a predetermined time after the projection is stopped (step S86), it is more convenient than the case where the projection start operation is performed again.

(14) When a predetermined time has elapsed after stopping the projection (Yes in step S91), the projection process is terminated (power off) (step S92), and thus when the projection is started against the user's intention due to an erroneous operation or the like. It is prevented that useless energization is continued. In addition, since the message is displayed on the liquid crystal display 104, the user is notified that the projection is finished (power off).

(15) When the in-machine temperature is higher than the predetermined temperature (determination of step S84 is negative), the projection process is ended (power off) (step S92), and thus energization is continued in a state where heat radiation is not properly performed. It is prevented. In addition, since the message is displayed on the liquid crystal display 104, the user is notified that the power has been turned off.

(16) During autofocus (AF) processing, the DC motor in the lens drive unit 224 is pulse-driven (duty 50% at a frequency of 60 Hz), the LED light source 223 is also pulse-driven at the same frequency and the same duty, and both are driven Complementary driving was performed by shifting the phase of the pulse current by 180 degrees. Thereby, the peak current consumption in the projection unit 220 can be suppressed, and the life of the battery 109 can be extended.

(Modification 1)
The frequency of the pulsed current supplied to the LED light source 223 and the DC motor may not be 60 Hz as long as both are the same, and may be appropriately changed within a range in which the viewer does not feel flicker (for example, 50 Hz). Further, the duty may not necessarily be 50%, but the phases of both are controlled so that the peak values of the drive current to the LED light source 223 and the drive current to the DC motor do not overlap. For example, when the duty of the current supplied to the LED light source 223 is 55%, the duty of the current supplied to the DC motor is set to 45% or less, and the two pulse currents are controlled to have a complementary relationship.

(Modification 2)
The driving of the liquid crystal panel 222 during the AF process may be synchronized with the driving timing of the LED light source 223. In other words, the pulsed power is also supplied to the liquid crystal panel 222 at the timing of supplying the pulsed current to the LED light source 223.

(Modification 3)
Although the lens driving DC motor has moved the focus lens back and forth, an example has been described in which a complementary relationship is provided between the pulsed current supplied to the LED light source 223 and the pulsed current supplied to the lens driving DC motor. The same applies when the lens driving DC motor moves the zoom lens forward and backward.

(Modification 4)
The pulse driving having the complementary relationship described above is not only between the LED light source 223 and the lens driving DC motor, but also between the LED light source 223 and the liquid crystal display 104, and between the LED light source 223 and the external interface (I / F) 107. Between the LED light source 223 and a circuit for accessing the recording medium. Further, when a flash light emitting device using a discharge type light source such as a xenon lamp is built in the electronic camera 10 with a built-in PJ, there is a complementary relationship between the circuit for charging the main capacitor for flash light emission and the LED light source 223. It is good to carry out pulse drive.

(Modification 5)
Before stopping the projection (step S88), a message for notifying the projection stop may be superimposed on the projection image, and the projection may be stopped after a predetermined time (for example, 1 minute has elapsed) from the start of the superposition.

(Modification 6)
The brightness detection (step S81) may be configured to be performed based on the imaging signal from the imaging unit 120. In this case, the CPU 101 instructs the imaging control circuit 124 to turn on the imaging unit, and acquires brightness information from an image signal captured by the imaging unit 120 (a signal corresponding to a subject other than the screen in the captured image). .

(Modification 7)
The external interface (I / F) 107 may be one that performs wired communication via a USB cable, for example, or may be one that performs wireless communication via a wireless transceiver.

(Modification 8)
FIG. 9 is a view of a PJ built-in electronic camera 10A according to Modification 8 as viewed from the front. Components common to those in FIG. 1 are denoted by common reference numerals and description thereof is omitted. In the present modification, the portion of the camera housing that houses the projection module is configured to be slidable in the horizontal direction, and is slid to the position shown in FIG. 9 in the projection mode. From the PJ built-in electronic camera 10A to the projection module, a drive current or the like is supplied to the LED 223 on the substrate 251 via a harness (not shown).

  When a part of the camera casing slides, the module guide surface 25 is exposed on the casing main body, and the heat radiation area increases. Furthermore, the module guide surface 25 is formed with a rail that fits with a part of the camera housing that has been slid and moved, and has a larger surface area than when formed in a planar shape. Accordingly, the PJ built-in electronic camera 10A can easily dissipate heat conducted from the projection module side to the camera housing.

  On the other hand, on the side of the projection module that has been slid, the substrate 251 is exposed on the back side, and the heat generated from the LED light source 223 is easily radiated. Further, a fitting member 252 c configured to be fitted to the rail of the module guide surface 25 and having thermal conductivity is joined to the bottom of the lid member 252. Since the fitting member 252c also has a larger surface area compared to the case where the fitting member 252c is formed in a planar shape, it is easy to dissipate heat on the projection module side.

(Second embodiment)
Details of the optical system arrangement of the projection unit 220 according to the second embodiment will be described with reference to FIGS. 10 and 11. FIG. 10 is a plan view of the optical system of the projection unit 220 as viewed from above, and FIG. 11 is a front view of the optical system of FIG. 10 as viewed from the front. In the second embodiment, the projection light and the photographing auxiliary light are emitted from a common optical system. When the projection light is emitted, the liquid crystal panel 222 is driven so as to generate an optical image. When the photographing auxiliary light is emitted, the transmittance of the liquid crystal layer of the liquid crystal panel 222 is controlled according to the required amount of illumination light.

  According to FIGS. 10 and 11, compared with the first embodiment (FIGS. 4 and 5), the mirror M1 and the illumination optical system 229 are omitted, and the heat dissipating member 270 is disposed in place of the cooling block 230. It is particularly different in the point that it is installed. Constituent elements common to the first embodiment are denoted by common reference numerals and description thereof is omitted.

  The LED 223 is mounted on an aluminum substrate 261 obtained by bending a rectangular metal thin plate into an L shape. The light from the LED 223 is configured to travel in the right direction without using a mirror. The point that the condensing optical system 226 and the PBS block 228 are bonded on the substrate 261 is the same as in the first embodiment.

  A lid member 262 is formed by bending an aluminum plate into a sheet metal so as to cover each member on the substrate 261. The lid member 262 is provided with an opening 262a, and a projection optical system 221 (also serving as an illumination optical system) is disposed in the opening 262a.

  The heat dissipating member 270 is surface-bonded to the surface opposite to the mounting surface of the LED light source 223 on the aluminum substrate 261 with good thermal conductivity. The heat radiating member 270 is formed, for example, by cutting a part of a cubic aluminum block to form fins.

  FIG. 12 is a side view of a PJ built-in electronic camera 10B on which the projection module described in FIGS. 10 and 11 is mounted. 12A is a diagram showing a state where the projection unit 220 is moved to the storage position, and FIG. 12B is a diagram showing a state where the projection unit 220 is moved (popped up) to the use position.

  The PJ built-in electronic camera 10B can emit photographing auxiliary light when the projection unit 220 is popped up to a use position in a state where the electronic camera 10B is activated in the photographing mode (main switch is on). In addition, the PJ built-in electronic camera 10B is activated in a projection mode and can emit projection light when the projection unit 220 is popped up to a use position with the main switch turned off. In order to detect the housed state / pop-up state of the projection unit 220, the PJ built-in electronic camera 10B incorporates a micro switch (not shown) that is turned on / off in conjunction with the movement of the projection unit 220.

  In FIG. 12 (b), the projection module popped up to the use position emits projection light from a higher position than when not popped up. The heat radiating member 270 is provided with a bellows 271 made of a material having good thermal conductivity, and heat is transmitted to the casing of the PJ built-in electronic camera 10B via the bellows 271. Thereby, the heat generated in the projection module is radiated not only from the heat radiating member 270 but also from the bellows 271 and the camera housing.

According to the second embodiment described above, the following operational effects can be obtained.
(1) Since the members (the LED light source 223 and the heat radiating member 270) that rise in temperature are disposed in the pop-up portion at the upper center of the body of the electronic camera 10B with a built-in PJ, it is possible to make it difficult for the user to touch the temperature-rising portion. .

(2) When the projection module is popped up to the use position, the exposed area becomes larger than when the pop-up module is not popped up, so that the heat radiation area can be widened. Furthermore, since heat is conducted to the camera housing via the bellows 271 having thermal conductivity, heat can be efficiently radiated. Since the bellows 271 conducts heat regardless of whether the projection unit 220 is in the use position or the storage position, the heat can be continuously dissipated even if the projection unit 220 is moved to the storage position immediately after the projection.

(3) By popping up the projection module to the use position, the height from the plane such as a table (not shown) on which the PJ built-in electronic camera 10B is placed to the projection optical system 221 can be earned. By raising the position of the projection optical system 221 (projection light beam exit), the possibility that a part of the projection light beam is displaced by the lens barrel or the mounting plane is reduced.

(4) Since the projection optical system 221 is also used as the illumination optical system, the cost can be reduced as compared with the case where the optical system is provided separately.

(Modification 9)
You may make it the structure which separated | separated the thermal radiation member 270 and LED light source 223 of a projection module, the condensing optical system 226, PBS block 228 grade | etc.,. FIG. 13 is a side view of a PJ built-in electronic camera 10 </ b> C on which the projection module according to Modification 9 is mounted. 13A is a diagram illustrating a state where the projection unit 220 is moved to the storage position, and FIG. 13B is a diagram illustrating a state where the projection unit 220 is moved (popped up) to the use position.

  In FIG. 13B, the pop-up section includes a condensing optical system 226, a PBS block 228, and the like. The members that raise the temperature (the LED light source 223 and the heat radiating member 270) are not included in the pop-up portion, but are placed at the upper center of the body of the PJ built-in electronic camera 10C so as to be difficult to touch.

  Heat conduction is performed between the heat dissipating member 270 and the metal back panel member 104B of the liquid crystal display 104 (FIG. 3) via the heat conducting member 272. As a result, heat can be efficiently radiated not only from the heat radiating member 270 but also from the metal back panel member 104B.

(Modification 10)
The projection optical system of the projection module may be separated from other members. FIG. 14 is a side view of a PJ built-in electronic camera 10D on which the projection module according to Modification 10 is mounted. FIG. 14A is a diagram illustrating a state where the projection unit 220 is moved to the storage position, and FIG. 14B is a diagram illustrating a state where the projection unit 220 is moved (popped up) to the use position.

  In FIG. 14B, the pop-up part includes a mirror M2 that also serves as a projection optical system. By raising the position of the mirror M2 (that is, the exit of the projected light beam) in the pop-up state, the possibility that a part of the projected light beam is displaced by the lens barrel or the mounting plane is reduced. Members that increase in temperature (such as the LED light source 223 and the cooling block 230 (similar to the first embodiment)) are not included in the pop-up part, but are placed at the upper center of the body of the electronic camera 10D with a built-in PJ so that the user cannot easily touch them. Set up.

  In the pop-up state, the cooling airflow flows more easily than when the pop-up is not performed. The cooling block sucks air from a vent hole (not shown) provided on the front surface of the PJ built-in electronic camera 10D. The cooling air flow is exhausted from a vent hole (not shown) provided on the upper surface of the PJ built-in electronic camera 10 </ b> D while cooling, as indicated by an arrow in the figure, while changing the course. This vent is provided so as to be exposed by the pop-up of the projection unit 220.

(Third embodiment)
FIG. 15 is a front view of a PJ built-in electronic camera 10E on which the projection module described in FIGS. 10 and 11 is mounted. According to FIG. 15, a projection unit 220 (shown by a broken line) is accommodated at the end of the camera casing that is located on the opposite side of the release button 14 (grip part G) across the photographic lens 11. (A portion accommodating the projection unit 220) is covered with the slide cover 26.

  16 is a diagram illustrating a state in which the projection unit 220 of the PJ built-in electronic camera 10E of FIG. 15 is enabled. FIG. 16 (a) is a top view, FIG. 16 (b) is a front view, and FIG. c) is a bottom view. When the slide cover 26 is pulled rightward from the housed state shown in FIG. 15, the end of the camera casing covered with the slide cover 26 is exposed, and the projection optical system 221 is exposed in front of the exposed casing end. Appears.

  When the slide cover 26 is pulled out while the PJ built-in electronic camera 10E is activated in the shooting mode (main switch is on), the projection auxiliary light can be emitted from the projection unit 220. Further, when the slide cover 26 is pulled out with the main switch turned off, the PJ built-in electronic camera 10E is activated in the projection mode, and projection light can be emitted from the projection unit 220. In order to detect the housed / drawn state of the slide cover 26, the PJ built-in electronic camera 10E incorporates a micro switch (not shown) that is turned on / off in conjunction with the movement of the slide cover 26.

  A space S is stretched and formed in the drawn slide cover 26 and becomes a passage for cooling airflow. In order to provide a cooling air flow path, at least two opposing surfaces of the space S are provided with vent holes. According to FIG. 16, the cooling air flow enters the slide cover 26 through the slit 26 b provided on the bottom surface of the slide cover 26 and the slit 26 f provided at the lower front of the slide cover 26, and moves upward in the slide cover 26. It advances and is discharged from a slit 26 t provided on the upper surface of the slide cover 26.

  In FIG. 16B, a black portion on the side surface of the housing of the PJ built-in electronic camera 10 </ b> E particularly indicates a portion where the temperature rises due to heat generated by the projection unit 220. A heat radiating member 270 that conducts heat generated by the LED light source 223 is joined to the side surface of the housing from the inside. Since the PJ built-in electronic camera 10E dissipates heat to the outside of the side surface of the housing, fins 27 are provided outside the side surface of the housing to enhance the cooling effect by the cooling airflow that moves upward in the slide cover 26.

  Further, in order to increase the flow velocity when the cooling airflow passes in the vicinity of the temperature rising portion, the elastic member 30 that narrows the space 30a in the vicinity of the temperature rising portion of the extended space S is disposed in the slide cover 26. It is installed. The elastic member 30 is composed of a plastic member, a thin metal plate, or the like, and is compressed when the slide cover 26 is in the storage state shown in FIG. 15, but the slide cover 26 is pulled out as shown in FIG. When in a state, it is configured to swell in the shape indicated by the broken line.

According to the third embodiment described above, the following operational effects can be obtained.
(1) The temperature rises from the inside of the camera case to the side of the case at the body end (right toward the front) of the PJ built-in electronic camera 10E located on the opposite side of the release button 14 (grip part G). Members (the LED light source 223 and the heat radiation member 270) were provided, and the outside of the side surface of the housing was covered with the slide cover 26. Thereby, it can be set as the structure which a user does not touch a temperature rising location easily.

(2) Since the slide cover 26 is configured to be slidable between the housed state and the drawer state, and the slide cover 26 covers the projection optical system 221 in the housed state, the slide cover 26 is used as a protective member for the projection optical system 221. You can also

(3) The projection unit 220 can emit light while the slide cover 26 is pulled out, and a space S is formed in the pulled slide cover 26 to secure a flow path for the cooling airflow. Thereby, it can be set as the structure which a user does not touch a temperature rising location easily. In addition to the slit 26b on the bottom surface of the slide cover 26, the slit 26f is also provided in the lower front portion of the slide cover 26. Therefore, even when the electronic camera 10E with a built-in PJ is placed on a flat surface, an entrance path for the cooling airflow is secured. The

(4) In order for the electronic camera 10E with a built-in PJ to radiate heat from the outside of the side surface of the housing to the space S in the slide cover 26, the fins 27 are provided on the outside of the side surface of the housing. Furthermore, since the elastic member 30 that narrows the space 30a in the vicinity of the temperature rise portion is disposed in the slide cover 26 in order to increase the flow velocity when the cooling airflow passes through the temperature rise portion, the heat dissipation effect can be enhanced.

(5) If the camera casing excluding the slide cover 26 has a waterproof structure, the waterproofness inside the camera casing can be maintained regardless of the movement state of the slide cover 26.

  In the above description, the example in which the slit 26f is provided in the lower front portion of the slide cover 26 separately from the bottom slit 26b of the slide cover 26 has been described. However, the slit may be provided in the lower side portion or lower back portion of the slide cover 26.

(Modification 11)
Instead of pulling out the cover, the projection housing part inside the cover may be pulled out. FIG. 17 is a front view of a PJ built-in electronic camera 10F according to the eleventh modification. According to FIG. 17, the PJ unit 28 that houses the projection unit 220 (shown by a broken line) is housed at the end of the electronic camera body (right toward the front).

  18A and 18B are diagrams showing a state in which the projection unit 220 of the electronic camera with built-in PJ 10F in FIG. 17 is usable. FIG. 18A is a top view, FIG. 18B is a front view, and FIG. c) is a bottom view. When the PJ portion 28 is pulled rightward from the storage state shown in FIG. 17, the PJ portion 28 covered with the camera body is exposed, and the projection optical system 221 appears in front of the exposed PJ portion 28.

  The PJ built-in electronic camera 10 </ b> F is capable of emitting photographing auxiliary light from the projection unit 220 when the PJ unit 28 is pulled out while being activated in the photographing mode (main switch on). In addition, when the PJ unit 28 is pulled out with the main switch turned off, the PJ built-in electronic camera 10 </ b> F is activated in the projection mode and can emit projection light from the projection unit 220. In order to detect the housed / drawn state of the PJ unit 28, the PJ built-in electronic camera 10F incorporates a micro switch (not shown) that is turned on / off in conjunction with the movement of the PJ unit 28.

  When the PJ portion 28 is pulled out, a space S is formed in the camera casing so as to be a passage for cooling airflow. In order to provide a cooling air flow path, at least two opposing surfaces of the space S are provided with vent holes. According to FIG. 18, the cooling air flow enters the camera casing from the slit 26b provided at the bottom surface of the casing end and the slit 26f provided at the lower front of the casing end and proceeds upward. The ink is discharged from a slit 26t provided on the upper surface of the housing end.

  In FIG. 18 (b), a black portion of the side surface of the PJ portion 28 indicates a portion where the temperature particularly increases due to the heat generated by the projection portion 220. A heat radiating member 270 that conducts heat generated by the LED light source 223 is joined to the side surface of the PJ portion 28 from the inside. Since the PJ built-in electronic camera 10F dissipates heat to the outside of the side surface of the PJ portion 28, fins 27 are provided outside the side surface of the PJ portion 28 to enhance the cooling effect by the cooling airflow that moves upward in the camera housing.

  Further, in order to increase the flow velocity when the cooling airflow passes in the vicinity of the temperature rising portion, an elastic member 30 that narrows the space 30a in the vicinity of the temperature rising portion of the extended space S is provided in the camera casing. Has been. The elastic member 30 is compressed when the PJ portion 28 is in the retracted state shown in FIG. 17, but when the PJ portion 28 is in the pulled-out state shown in FIG. Configured to swell.

(Modification 12)
In the third embodiment and the modified example, the space S is formed as a cooling airflow passage by pulling out the slide cover 26 and the PJ portion 28, respectively. You may comprise so that it may ensure.

(Modification 13)
In the PJ built-in electronic camera 10 shown in FIGS. 15 to 18, the height of the space S that is the passage of the cooling airflow is made the same as the height of the PJ built-in electronic camera 10 body. In this case, if the PJ built-in electronic camera 10 is placed in an upright state, it is difficult to take in the cooling airflow from the bottom surface of the space S. Therefore, a slit 26f is provided in the lower front portion of the space S. In this modification, in order to efficiently take in the cooling airflow, the structure is such that the bottom surface of the space S is slightly above the bottom surface of the PJ built-in electronic camera 10 body. With such a structure, even when the camera is placed upright, there is a space below the space S, so that it is easy to take in the cooling airflow from the bottom surface. When the space S is shortened, the shape of the portion where the projection unit 220 of the PJ built-in electronic camera 10 body is arranged may be shortened or not shortened according to the space S.

(Fourth embodiment)
FIG. 19 is a view of a PJ built-in electronic camera 10K on which the projection module described in FIGS. 10 and 11 is mounted as viewed from the front. The photographing optical system 121 of the PJ built-in electronic camera 10 </ b> K is a refractive optical system that folds the subject light beam incident from the front surface of the camera body and guides it to the image sensor 122. By using such a refractive optical system, a thin space is formed between the front surface and the back surface of the electronic camera with built-in PJ 10K.

  According to FIG. 19, the imaging unit 120 (shown by a broken line) is arranged vertically on the right side. Specifically, the photographing lens 11 (121) is disposed on the upper right side of the front surface, and the image sensor 122 is disposed near the right bottom surface. The projection unit 220 (shown by a broken line) is arranged side by side with the imaging unit 120 at the upper end of the body center (center in the left-right direction) of the PJ built-in electronic camera 10K. The optical system of the projection unit 220 is disposed with its longitudinal direction being transverse, and the members (the LED light source 223 and the heat dissipation member 270) whose temperature rises are the upper end of the body and are closer to the center in the left-right direction than the projection optical system 221. Located in. The release button 14 is disposed on the upper left portion of the body of the electronic camera 10K with a built-in PJ.

According to the fourth embodiment described above, the following operational effects can be obtained.
(1) Even in the case of the electronic camera 10K with a built-in PJ having the refraction type photographing optical system 121, since the members (the LED light source 223 and the heat radiation member 270) whose temperature rises are arranged at the upper center of the body, the user can When the user holds the finger and puts the finger on the release button 14, it is possible to make it difficult to touch the temperature rising portion.

(2) Since the heat dissipating member 270 is disposed at the upper end of the camera body, the heat dissipating effect can be further enhanced by providing the heat dissipating hole in the housing.

(Modification 14)
FIG. 20 is a diagram for explaining another PJ built-in electronic camera 10 </ b> L having the refraction type photographing optical system 121. In FIG. 20, the imaging unit 120 (shown by a broken line) is arranged vertically on the right side as in the case of FIG. The projection unit 220 (shown by a broken line) is arranged side by side with the imaging unit 120 at the center of the body (center in the left-right direction) of the electronic camera with built-in PJ 10L. The optical system of the projection unit 220 is arranged with the longitudinal direction vertical, and members (the LED light source 223 and the heat dissipation member 270) whose temperature rises are located in the center of the body and closer to the center than the projection optical system 221. .

  When a flash light emitting device using a discharge type light source such as a xenon lamp is built in the electronic camera 10L with a built-in PJ, a light irradiation window 35 is arranged alongside the projection optical system 221. The position of the light irradiation window 35 can be separated from the photographing lens 11 (121), and can be set to a position where it is difficult for the user's finger to touch.

  According to the modified example 14, since the members (the LED light source 223 and the heat radiating member 270) whose temperature rises are disposed at the center of the body of the PJ built-in electronic camera 10L having the refraction type photographing optical system 121, the user can hold the body. When gripping and putting the finger on the release button 14, it is possible to make it difficult to touch the temperature rising portion.

(Modification 15)
FIG. 21 is a diagram for explaining another PJ built-in electronic camera 10M having the refraction type photographing optical system 121. As shown in FIG. According to FIG. 21, the imaging unit 120 (shown by a broken line) is disposed horizontally long at the center of the body (center in the left-right direction) of the PJ built-in electronic camera 10M. Specifically, the photographing lens 11 (121) is disposed in the center of the front surface, and the image sensor 122 is disposed on the left side of the front surface. The projection unit 220 (shown by a broken line) is disposed at the upper center portion of the body of the PJ built-in electronic camera 10M. The optical system of the projection unit 220 is disposed with its longitudinal direction being transverse, and the members (the LED light source 223 and the heat dissipation member 270) whose temperature rises are the upper end of the body and are closer to the center in the left-right direction than the projection optical system 221. Located in.

According to the modified example 15, since the members (the LED light source 223 and the heat radiating member 270) whose temperature rises are disposed at the upper center of the body of the PJ built-in electronic camera 10M having the refraction type photographing optical system 121, the user When the user holds the finger and puts the finger on the release button 14, it is possible to make it difficult to touch the temperature rising portion.
(Modification 16)
FIG. 22 is a diagram for explaining another PJ built-in electronic camera 10N having the refraction type photographing optical system 121. In FIG. 22, the image pickup unit 120 (shown by a broken line) is arranged horizontally in the center of the body (center in the left-right direction) of the electronic camera with built-in PJ 10N, as in FIG. The projection unit 220 (shown by a broken line) is disposed at the body side end of the PJ built-in electronic camera 10N. The optical system of the projection unit 220 is arranged with the longitudinal direction vertical, and members (the LED light source 223 and the heat radiation member 270) whose temperature rises are body side ends (the side opposite to the release button 14) and are projected. It is located closer to the center in the vertical direction than the optical system 221.

  When a flash light emitting device using a discharge type light source such as a xenon lamp is built in the electronic camera with built-in PJ 10N, the light irradiation window 35A is arranged side by side with the projection optical system 221. The position of the light irradiation window 35 </ b> A can be separated from the photographing lens 11 and can be set to a position where it is difficult for the user's finger to touch.

  According to the modified example 16, since the members (the LED light source 223 and the heat radiating member 270) that rise in temperature are disposed at the body side end of the electronic camera 10N with a built-in PJ having the refraction type photographing optical system 121, the user When the user holds the finger and puts the finger on the release button 14, it is possible to make it difficult to touch the temperature rising portion.

  In the fourth embodiment described above and Modifications 14 to 16, the circuit that processes the projection image signal according to the position of the projection unit 220 (for example, image data sent from the CPU 101 to the projection control circuit 225) And the signal processing circuit thereof are preferably arranged in the vicinity of the projection unit 220. By shortening the projection image signal line, interference with other signal lines such as an imaging signal can be suppressed, and noise superimposed on the signal can be reduced.

(Fifth embodiment)
The projection direction by the projection unit 220 may be different from the photographing direction by the photographing lens 11. FIG. 23 is a diagram illustrating a PJ built-in electronic camera 10G on which the projection module described in FIGS. 10 and 11 is mounted. FIG. 23 (a) is a front view and FIG. 23 (b) is a side view. The PJ built-in electronic camera 10G illustrated in FIG. 23 is a single-lens reflex type, and the photographing lens 11 is attached to a lens mount (not shown) in front of the camera housing. A projection unit 220 (shown by a broken line) is accommodated in the camera housing, and the projection optical system 221 is located on the side surface of the camera housing opposite to the side surface on the grip portion G side with the photographing lens 11 interposed therebetween. . In addition, you may comprise with the camera of the type from which the taking lens 11 does not remove from a camera housing | casing.

  The PJ built-in electronic camera 10G is capable of emitting projection light when activated in the projection mode (main switch on), and prohibited from emitting projection light when activated in the imaging mode (main switch on). Is done.

  In FIG. 23 (b), heat conduction is performed between the heat dissipation member 270 of the projection unit 220 and the metal back panel member 104B of the liquid crystal display 104 (FIG. 3) via the heat conduction member 272. .

  The electronic camera with built-in PJ 10G is configured to be able to project even in a lean position and orientation with the photographing lens 11 down. According to FIG. 24, the outer diameter of the lens cap 11 </ b> C is sufficiently larger than the aperture of the photographic lens 11, and the placement area in the lean position / posture can be made larger than the aperture area of the photographic lens 11. Thereby, even when the interchangeable photographic lens 11 having a long focal length is attached to the electronic camera 10G with a built-in PJ, the mounting posture on the plane is stabilized.

  The CPU 101 of the PJ built-in electronic camera 10 </ b> G determines whether the mounting posture shown in FIG. 23 or the mounting posture shown in FIG. 24 based on the posture detection signal from the posture sensor 111. The CPU 101 further rotates the image data on the memory 102 according to the determined mounting posture, and sends the image data after the rotation processing to the projection unit 220.

According to the fifth embodiment described above, the following operational effects can be obtained.
(1) Since the projection direction from the projection unit 220 is the direction of the body side surface of the PJ built-in electronic camera 10G, the lens mirror can be used even when the photographing lens 11 having a long focal length is attached to the front of the camera body. There is no possibility that a part of the projected light beam is lost by the cylinder.

(2) Since the projection direction from the projection unit 220 is the direction of the body side surface, the projection light is blocked by the user's hand when the user grips the body side surface on the projection unit 220 side. For this reason, the user can be encouraged not to have the body side surface on the projection unit 220 side during projection, and the user can hardly touch the temperature rising portion.

(3) Since the body side surface is a surface opposite to the side surface on the grip portion G side, it is possible to reduce the possibility that the projection light is blocked by the user's hand when the user grips the body side surface. When it is assumed that the PJ built-in electronic camera 10G is projected on the projection unit 220 in a state of being placed on a plane, the projection unit 220 may be arranged on any side of the body and projected to the side. Absent.

(4) Since the members (the LED light source 223 and the heat dissipation member 270) that rise in temperature so as to be in contact with the side surface of the housing from the inside of the housing of the PJ built-in electronic camera 10G are disposed, the camera housing also moves to the outside of the housing. Heat can be dissipated.

(5) Since heat is transmitted from the heat dissipation member 270 to the metal back panel member 104B via the member 272 having thermal conductivity, heat can be efficiently radiated from the metal back panel member 104B.

(6) Since the protective member (lens cap 11C) having an outer diameter area sufficiently larger than the aperture area of the photographic lens 11 is attached to the photographic lens 11, the electronic camera 10G with a built-in PJ in the lean position posture with the photographic lens 11 down. Can be stabilized. Thereby, stable placement is possible even on an inclined surface.

(7) Since the posture is detected and image rotation processing is performed, and the image after the rotation processing is projected from the projection unit 220, it is possible to automatically project an erect image having the correct orientation from the lean position and posture. it can.

(Modification 17)
In the mounting posture of FIG. 23, when the photographing lens 11 having a long focal length is attached, the electronic camera 10G with a built-in PJ may be tilted to the front side (the photographing lens 11 side). In order to correct the tilt of the electronic camera with built-in PJ 10G in this case, the mounting posture of the electronic camera with built-in PJ 10G is stabilized using a protective member (lens cap 11D). FIG. 25A is a diagram illustrating a PJ built-in electronic camera 10G equipped with the lens cap 11D and the photographic lens 11. FIG. 25A is a front view and FIG. 25B is a side view.

  According to FIG. 25, the center of the outer diameter of the lens cap 11D is decentered so as to be different from the center of the aperture of the photographing lens 11. By rotating the lens cap 11D attached to the photographing lens 11 around the center of the photographing lens 11, the distance between the lens barrel of the photographing lens 11 and the plane on which the PJ built-in electronic camera 10G is placed is adjusted. The

  According to the modified example 17, even when the photographing lens 11 having a long focal length is attached to the PJ built-in electronic camera 10G, the mounting posture on the plane can be stabilized. Further, part of the projected light beam is not removed by the lens cap 11D.

(Modification 18)
FIG. 26 is a diagram for explaining another example of correcting the tilt of the PJ built-in electronic camera 10G. FIG. 26A is an overall view illustrating a PJ built-in electronic camera 10G supported by the memory holder 31, and FIG. 26B is a side view.

  In FIG. 26A, the memory holder 31 is attached to the camera strap 34. In FIG. 26B, the memory holder 31 is formed in a triangular prism shape, and is provided with a strap hole 32 penetrating in a direction perpendicular to the paper surface. The memory holder 31 is inserted between the barrel of the photographing lens 11 and the mounting plane of the PJ built-in electronic camera 10G in a state where the triangular prism is laid so that the wedge-shaped bottom surface can be seen from the side. In addition, illustration of the strap 34 is abbreviate | omitted in FIG.26 (b). Next to the strap hole 32, a holder portion 33 for storing the spare memory card 150 is provided. The surfaces 31a and 31b of the memory holder 31 are processed to be rough so that an anti-slip effect can be obtained.

  According to the modified example 18, even when the photographing lens 11 having a long focal length is mounted on the PJ built-in electronic camera 10G, the mounting posture on the plane can be stabilized. By varying the depth at which the memory holder 31 is inserted below the photographing lens 11, the distance between the lens barrel of the photographing lens 11 and the plane on which the PJ built-in electronic camera 10G is placed can be adjusted. Further, a part of the projected light beam is not lost by the memory holder 31.

  The mounting posture of the electronic camera with built-in PJ 10G is stabilized by using a lens cap holder for storing a lens cap or a remote control holder for storing a remote control transmitter (both having a wedge shape) instead of the memory holder 31. You may let them.

  Alternatively, the lens cap may be formed in a wedge shape, and the wedge-shaped portion of the lens cap may be inserted between the lens barrel of the photographing lens 11 and the mounting plane of the PJ built-in electronic camera 10G. Furthermore, in order to stabilize the mounting posture of the PJ built-in electronic camera 10 </ b> G, a dedicated wedge-shaped member may be provided. In this case, the wedge-shaped member is preferably configured to be attachable to the camera strap 34.

(Modification 19)
In order to stabilize the mounting posture of the PJ built-in electronic camera 10G, a configuration may be adopted in which a stabilizing plate that can be pulled out is provided on the bottom surface of the camera body. FIG. 27 is a side view illustrating the horizontal stabilizer 36 disposed on the bottom surface of the PJ built-in electronic camera 10G. In FIG. 27, the horizontal stabilizing plate 36 is constituted by two thin plate members connected to each other, and can be pulled out in two stages in the direction of the arrow. The user pulls out (opens) an amount necessary to stabilize the mounting posture of the PJ built-in electronic camera 10G. Thereby, the area which touches a mounting plane spreads, and a mounting attitude | position is stabilized.

  When the horizontal stabilizer 36 is not used, the horizontal stabilizer 36 is stored (closed) in a slot (shown by a broken line) provided along the bottom surface of the camera body. If heat from the heat radiating member 270 is transmitted to the slot portion (camera housing) via the member 272 having thermal conductivity, heat can be efficiently radiated from the horizontal stabilizer 36. The slot portion and the horizontal stabilization plate 36 are also connected with a heat conductive material.

  According to the modified example 19 described above, even when the photographing lens 11 having a long focal length is attached to the electronic camera with built-in PJ 10G, the mounting posture on the plane can be stabilized. Further, heat can be radiated from the horizontal stabilizer 36, and the horizontal stabilizer 36 does not scatter a part of the projected light beam.

(Modification 20)
The horizontal stabilizer may be configured to be rotatable. FIG. 28 is a side view illustrating a horizontal stabilization plate 36A that is rotatably supported by a hinge member (not shown) having a straight line (for example, one side of the bottom surface) in the bottom surface of the electronic camera with built-in PJ 10G as a rotation shaft. It is. In FIG. 28, the horizontal stabilizer 36A is rotated 180 degrees in the direction of the arrow from the folded state (indicated by a broken line). The user rotates and opens the horizontal stabilization plate 36A when stabilizing the mounting posture of the electronic camera with built-in PJ 10G. Thereby, the area which touches a mounting plane spreads, and a mounting attitude | position is stabilized.

  When the horizontal stabilizer 36A is not used, the horizontal stabilizer 36A is folded and closed along the bottom surface of the camera body (indicated by a broken line). If heat from the heat radiating member 270 is transmitted to the bottom surface of the camera body via the member 272 having thermal conductivity, heat can be efficiently radiated from the horizontal stabilizer 36A. Note that heat conduction is performed from the bottom surface of the camera body to the horizontal stabilization plate 36A via a hinge member that supports the horizontal stabilization plate 36A.

  According to the modified example 20 described above, even when the photographing lens 11 having a long focal length is attached to the electronic camera with built-in PJ 10G, the mounting posture on the plane can be stabilized. Further, heat can be radiated from the horizontal stabilizer 36A, and a part of the projected light beam is not lost by the horizontal stabilizer 36A.

(Modification 21)
In order to stabilize the mounting posture of the electronic camera with built-in PJ 10G, a configuration in which a stabilizing plate that can be pulled out on the side surface of the camera body may be provided. FIG. 29 is a diagram illustrating the vertical stabilizer 36B disposed on the side surface portion of the PJ built-in electronic camera 10G, in which FIG. 29 (a) is a top view and FIG. 29 (b) is a side view. In FIG. 29 (a) and FIG. 29 (b), the vertical stabilizing plate 36B is composed of two connected thin plate members, and can be pulled out in two stages in the direction of the arrow. The user pulls out (opens) an amount necessary to stabilize the mounting posture of the PJ built-in electronic camera 10G. Thereby, the mounting posture is stabilized.

  When the vertical stabilizer 36B is not used, the vertical stabilizer 36B is stored (closed) in a slot (indicated by a broken line in FIG. 29A) provided along the side surface of the camera body. If heat from the heat radiating member 270 is transmitted to the slot portion (camera housing) via a member (not shown) having thermal conductivity, heat can be efficiently radiated from the vertical stabilizer 36B. The slot portion and the vertical stabilizer 36B are also connected with a heat conductive material.

  Also in the modified example 21 described above, when the photographing lens 11 having a long focal length is mounted on the PJ built-in electronic camera 10G, the mounting posture on the plane can be stabilized. Further, heat can be radiated from the vertical stabilizer 36B, and a part of the projected light beam is not lost by the vertical stabilizer 36B.

(Modification 22)
The PJ built-in electronic camera 10G switches to the projection mode when the horizontal stabilizer or the vertical stabilizer is pulled out (or rotated) in the operation mode other than the projection mode such as the photographing mode. You may make it the structure which starts light emission. A built-in micro switch (not shown) that is turned on / off in conjunction with the above-described pulling (or turning) operation is detected in order to detect the state in which the horizontal stabilizing plate or the vertical stabilizing plate is drawn (or turned). Keep it. In this case, when the horizontal stabilizer or the vertical stabilizer is stored, the emission of the projection light is terminated, and the projection mode is switched to the most recent operation mode other than the projection mode.

  In Modifications 19 to 22, the electronic camera with built-in PJ 10G is activated in the projection mode when the horizontal stabilizer or the vertical stabilizer is pulled out (or rotated) with the main switch turned off. Then, the emission of the projection light may be started. In this case, when the horizontal stabilizer or the vertical stabilizer is stored, the projection is terminated and the power-off process is performed.

(Modification 23)
The vertical stabilizer may be configured to be rotatable. FIG. 30 is a side view illustrating a vertical stabilization plate 37 that is rotatably supported by a hinge member (not shown) having a straight line in the side surface of the electronic camera with built-in PJ 10G as a rotation axis. 30A shows the folded state of the vertical stabilizer 37, and FIG. 30B shows the pivoted state of the vertical stabilizer 37. FIG.

  The vertical stabilizing plate 37 of the modified example 23 also serves as a lid member that closes the opening of the camera casing. In the opening, a connector or the like constituting the projection optical system 221 and the external interface (I / F) 107 is disposed. When the vertical stabilizer 37 is folded (FIG. 30A), these projection optics The system 221 and the like are protected by the vertical stabilizer 37. When the vertical stabilizer 37 is rotated 180 degrees from the folded state, the vertical stabilizer 37 stabilizes the mounting posture of the PJ built-in electronic camera 10G as shown in FIG.

  If heat from the heat radiating member 270 is transmitted to the side surface of the camera body via a member having thermal conductivity, heat can be efficiently radiated from the vertical stabilizer 37 as well. Note that heat conduction is performed from the side surface of the camera body to the vertical stabilization plate 37 via a hinge member that supports the vertical stabilization plate 37.

  According to the modified example 23 described above, even when the photographing lens 11 having a long focal length is attached to the electronic camera with built-in PJ 10G, the mounting posture on the plane can be stabilized. Further, heat can be radiated from the vertical stabilizer 37, and the vertical stabilizer 37 does not scatter a part of the projected light beam. Further, since the folded vertical stabilizing plate 37 also serves as a lid member and protects the projection optical system 221 and the connector of the external interface (I / F) 107, the lid member and the vertical stabilizing plate are provided separately. The number of parts can be further reduced. Note that only the projection optical system 221 may be provided in the opening of the camera housing, or only the external interface (I / F) 107 may be provided. By rotating the vertical stabilization plate 37 by 180 degrees, the PJ built-in electronic camera 10G is activated in the projection mode to enable projection light emission, that is, the vertical stabilization plate 37 may be used as a projection switch. .

(Sixth embodiment)
A camera system is composed of a camera body whose photographing lens can be exchanged and a projector which can be mounted on the lens mount of the camera body. FIG. 31 is a block diagram illustrating a circuit configuration of the camera system. In FIG. 31, the same components as those in FIG.

  The electronic camera 10H is, for example, a single-lens reflex electronic camera. Compared with the circuit configuration described in FIG. 3, the lens driving unit and the lens barrel retracting mechanism are omitted, and the lens mount 110 is added. When a normal photographing lens (not shown) is attached to the lens mount 110, the CPU 101 communicates with the CPU on the photographing lens side via a communication terminal provided on the lens mount 110. The electronic camera 10H captures a subject image formed on the image sensor 112 by the photographing lens.

  When the projector 50 is mounted on the lens mount 110, the CPU 101 communicates with the CPU 201 on the projector 50 side via a communication terminal provided on the lens mount 110. In this case, the electronic camera 10H does not shoot, but causes the projector 50 to perform projection.

  In FIG. 31, the communication line via the communication terminal is indicated by a control line (Control I / F) and a data line (Data I / F). The contents transmitted by the CPU 101 to the photographing lens are, for example, the movement amount, movement direction, and movement start instruction of the focus optical system. The content transmitted by the CPU 101 to the projector 50 is, for example, a projection start / projection end instruction, content data to be projected, or the like. It is also possible to supply power from the electronic camera 10H to the taking lens via a power supply terminal provided in the lens mount 110.

  The projector 50 includes a projection unit 220, a CPU 201, an external interface (I / F) 202, a power supply circuit 203, a memory 205, an operation member 206, a temperature, in addition to a mounting unit 210 that fits into the lens mount 110. And a sensor 207. A battery 204 is mounted on a battery holder (not shown).

  The CPU 201 controls the projection operation by sending a control signal to each part of the projector 50 by performing a predetermined calculation using a signal input from each part of the projector 50 based on the control program. . The control program is stored in a nonvolatile memory (not shown) in the CPU 201.

  The memory 205 is used as a working memory for the CPU 201. The operation member 206 sends an operation signal corresponding to the operation content of each member to the CPU 201. The power supply circuit 203 is turned on / off according to an instruction from the CPU 201, converts the voltage from the battery 204 to a voltage required by each circuit when the power is turned on, and supplies power to each unit of the projector 50.

  The external interface (I / F) 202 converts the received signal into image data and sends the converted image data to the CPU 201 in order to cause the projection unit 220 to project a reproduced image based on the signal transmitted from the external device. The temperature sensor 207 is disposed near the projection unit 220 and sends a temperature detection signal to the CPU 201. The CPU 201 calculates the in-machine temperature near the projection unit 220 based on the temperature detection signal.

  FIG. 32 is a diagram illustrating a state in which the projector 50 on which the projection module described in FIGS. 10 and 11 is mounted is mounted on the electronic camera 10H. FIG. 32 (a) is a front view, and FIG. 32 (b) is a front view. It is a side view. 32 (a) and 32 (b), the projection module is set so that its longitudinal direction is horizontal and the line CP passing through the center of the projection optical system is offset above the line CL passing through the center of the lens barrel of the projector 50. Arranged. The projection unit 220 protrudes inside the electronic camera 10H, but is disposed at a position where it does not interfere with the mirror 131. If the mirror 131 moves in this state, the mirror 131 may be damaged. Therefore, when the projector 50 is mounted on the electronic camera 10H, the movement of the mirror 131 is prohibited.

  The lens barrel of the projector 50 is provided with a focus ring 51 and a zoom ring 52. When the zoom ring 52 is rotated, the zoom lens 221b constituting the projection optical system 221 is moved forward and backward in the optical axis direction according to the operation amount. When the focus ring 51 is rotated, the focus lens 221a constituting the projection optical system 221 is moved forward and backward in the optical axis direction according to the operation amount. The projector 50 can also perform autofocusing. In this case, autofocusing is performed by disposing an imaging unit or a distance measuring sensor for autofocusing in the projector 50 or the electronic camera 10H. These are electrically driven, but may be directly driven mechanically by operating the zoom ring and the focus ring.

  A length HB from the mounting portion 210 of the projector 50 to the outer edge (outer periphery) of the lens barrel is shorter than a length HA from the lens mount 110 of the electronic camera 10H to the bottom surface of the camera casing. Therefore, a support member 53 is disposed at the lower part of the lens barrel. The support member 53 is configured such that its position does not change even when the focus ring 51 and the zoom ring 52 are operated. With the electronic camera 10H mounted on the lens mount 110, the mounting posture on the plane is stabilized by the bottom surface of the electronic camera 10H and the support member 53. In the present embodiment, the length from the attachment portion 210 to the outer edge of the lens barrel and the length from the bottom surface of the camera housing have been described. However, the length from the center of the attachment portion 210 is not the length from the attachment portion 210. It becomes the same relation.

<Projection source: source>
The projection unit 220 of the projector 50 projects content from any of the following “source 1” to “source 3” in accordance with a command from the CPU 201. The CPU 201 receives image data corresponding to each image so that the projected images of “source 1” and “source 2” are alternately switched each time a source switching operation signal is input from the operation member 206 (or the electronic camera 10H). Is sent to the projection unit 220. However, if the projector 50 is not attached to the lens mount 110 of the electronic camera 10H, or if the electronic camera 10H is turned off even if the projector 50 is attached to the lens mount 110 of the electronic camera 10H, the “source “1” is not selected, and “source 2” is not selected when no external device is connected to the external interface (I / F) 202.

  In addition, when a switching instruction signal for chart projection is input from the attached electronic camera 10 </ b> H, the CPU 201 sends image data corresponding to “Source 3” below to the projection unit 220.

Source 1: Reproduced image by data transmitted from electronic camera 10H Source 2: Reproduced image by data input from external interface (I / F) 202 3: Chart for focus adjustment, for example, black line on white background Image composed of stripes by

  In the camera system according to the present embodiment, the projector 50 attached to the electronic camera 10H performs a projection operation while communicating with the electronic camera 10H.

<Projector-side processing>
FIG. 33 is a flowchart for explaining the flow of processing by a program executed by CPU 201 of projector 50. 33 starts when a main switch (not shown) of the projector 50 is turned on.

  In step S201 in FIG. 33, the CPU 201 determines whether communication has been established. The CPU 201 communicates with the CPU 101 on the electronic camera 10H side using a predetermined communication protocol, and if communication is established, an affirmative determination is made in step S201 and the process proceeds to step S202. If the communication is not established, the CPU 201 makes a negative determination in step S201 and proceeds to step S212.

  In step S212, the CPU 201 performs normal processing. In the normal processing, when the projector 50 is used alone without being attached to the electronic camera 10H, the main switch of the electronic camera 10 to which the projector 50 is attached is turned off, and communication with the projector 50 is performed. This is processing when the projector 50 is attached to a camera that does not have a function.

  The CPU 201 that performs normal processing instructs the projection control circuit 225 to perform projection on / off, projection source switching, focus adjustment, and zoom adjustment processing according to an operation signal input from the operation member 206. Specifically, when an operation signal from a light source on / off switch (not shown) is input, the LED light source 223 is instructed to be turned on / off according to the operation signal. When the source switching operation signal is input, the image data to be sent to the projection unit 220 is switched as described above. The initial image projected by the projector 50 when communication with the electronic camera 10H is not established is a reproduced image corresponding to the “source 2”.

  In addition, when an operation signal for adjusting the focus (an operation signal from the focus ring 51) is input, the CPU 201 sends a focus adjustment signal corresponding to the operation signal to the projection control circuit 225. When an operation signal for zoom adjustment (an operation signal from the zoom ring 52) is input, the CPU 201 sends a zoom adjustment signal corresponding to the operation signal to the projection control circuit 225. When the CPU 201 performs the normal process in this way, the process proceeds to step S211.

  In step S202, the CPU 201 determines whether a projection instruction has been issued. The CPU 201 makes a positive determination in step S202 when a signal instructing projection is input and proceeds to step S203. If a signal instructing the projection is not input, the CPU 201 makes a negative determination in step S202 and proceeds to step S204. The signal for instructing the projection is a control signal transmitted from the electronic camera 10H or an operation signal from the operation member 206.

  In step S203, the CPU 201 instructs the projection control circuit 225 to start or end the projection according to the input signal, and proceeds to step S204. Note that the initial image projected by the projector 50 onto the screen (not shown) when communication with the electronic camera 10H is established is reproduced by data transmitted from the electronic camera 10H of the “source 1”. An image.

  In step S204, the CPU 201 determines whether source switching has been instructed. When a signal instructing switching of the projection source is input, the CPU 201 makes a positive determination in step S204 and proceeds to step S205. When a signal instructing switching of the projection source is not input, the CPU 201 makes a negative determination in step S204. The process proceeds to S206. The signal for instructing the source switching is a control signal transmitted from the electronic camera 10H or an operation signal from the operation member 206.

  In step S205, the CPU 201 switches image data to be sent to the projection unit 220 according to the input signal, and proceeds to step S206. The image data to be sent corresponds to either “source 1” or “source 2”.

  In step S206, the CPU 201 determines whether zoom adjustment is instructed. When a signal for instructing zoom adjustment is input, the CPU 201 makes a positive determination in step S206 and proceeds to step S207. When a signal for instructing zoom adjustment is not input, the CPU 201 makes a negative determination in step S206 and proceeds to step S208. The signal for instructing zoom adjustment is a control signal transmitted from the electronic camera 10H or an operation signal by the zoom ring 52.

  In step S207, the CPU 201 performs zoom adjustment processing. The CPU 201 sends a zoom adjustment signal corresponding to the input signal to the projection control circuit 225, and proceeds to step S208.

  In step S208, the CPU 201 determines whether focus adjustment is instructed. If a signal instructing focus adjustment is input, CPU 201 makes an affirmative determination in step S208 and proceeds to step S209. If a signal instructing focus adjustment is not input, the CPU 201 makes a negative determination in step S208 and proceeds to step S210. The signal for instructing the focus adjustment is a control signal transmitted from the electronic camera 10H or an operation signal by the focus ring 51.

  In step S209, the CPU 201 performs focus adjustment processing. The CPU 201 sends the chart image data of the “source 3” to the projection control circuit 225 instead of the reproduced image of the “source 1” or “source 2”, and causes the chart image to be projected. The CPU 201 further sends a focus adjustment signal corresponding to the input signal to the projection control circuit 225. When a signal for instructing focus adjustment is not input and a predetermined time (for example, 5 seconds) elapses, the CPU 201 projects the original reproduction image instead of the chart image of “source 3”, and proceeds to step S210.

  In step S210, the CPU 201 determines whether an OFF instruction has been issued. When an off operation signal from the main switch or an off control signal transmitted from the electronic camera 10H is input, the CPU 201 makes an affirmative determination in step S210 and proceeds to step S211 when a signal for instructing power off is not input. Makes a negative determination in step S210 and returns to step S201.

  In step S211, the CPU 201 instructs the projection control circuit 225 to end the projection, performs a predetermined power-off process, and ends the process shown in FIG.

<Processing on the electronic camera>
FIG. 34 is a flowchart for explaining the flow of processing by a program executed by the CPU 101 of the electronic camera 10H. The process shown in FIG. 34 is activated when the electronic camera 10H is switched from the shooting mode to the playback mode. The playback mode is an operation mode in which captured image data is read from the memory card 150, and a playback image based on the image data is displayed on the liquid crystal display 104. In step S101 of FIG. 34, the CPU 101 instructs the imaging control circuit 124 to turn off the imaging unit, and proceeds to step S102. Thereby, the imaging operation by the imaging element 122 is stopped.

  In step S102, the CPU 101 determines whether communication has been established. The CPU 101 communicates with the CPU 201 on the projector 50 side mounted on the lens mount 110 using a predetermined communication protocol, and if communication is established (the communication partner recognizes the projector 50), step S102 is affirmed. Determine and proceed to step S109. If communication is not established, CPU 101 makes a negative determination in step S102 and proceeds to step S103.

  In the case of proceeding to step S103, the CPU 101 causes the liquid crystal display 104 to display the reproduced image. In step S103, the CPU 101 causes the liquid crystal display 104 to start reproduction display, and proceeds to step S104. In this case, the CPU 101 does not transmit a control signal or data to the projector 50.

  When proceeding to step S109, the CPU 101 causes the projector 50 to project the reproduced image. In step S109, the CPU 101 transmits a projection start instruction (control signal) to the projector 50, turns off the display by the liquid crystal display 104, and proceeds to step S104.

  In step S104, the CPU 101 reads the image data with the newest recording date from the memory card 150, and sets the read image data as image data for reproduction. The CPU 101 transmits the reproduction image data to the liquid crystal display 104 when displaying the reproduction image on the liquid crystal display 104, and transmits the reproduction image data to the projector 50 when projecting the reproduction image on the projector 50. As a result, a reproduced image based on the image data sent out by the CPU 101 is reproduced and displayed (projected) by the liquid crystal display 104 or the projector 50.

  In step S105, the CPU 101 determines whether or not a frame advance / frame return operation has been performed. When an operation signal instructing frame advance or frame return is input from the operation member 103, the CPU 101 makes an affirmative decision in step S105 and returns to step S104 to read out and read the image data corresponding to the operation signal from the memory card 150. The image data is set as image data for reproduction. On the other hand, when neither of the operation signals instructing frame advance and frame return is input from the operation member 103, the CPU 101 makes a negative determination in step S105 and proceeds to step S106.

  In step S106, the CPU 101 determines whether a source switching operation has been performed. When an operation signal instructing source switching is input from the operation member 103, the CPU 101 makes an affirmative determination in step S106 and proceeds to step S111. If an operation signal instructing source switching is not input, the CPU 101 makes a negative determination in step S106. Then, the process proceeds to step S107.

  In step S107, the CPU 101 determines whether or not a mode switching operation has been performed. When the operation signal for switching to the photographing mode is input from the operation member 103, the CPU 101 makes an affirmative decision in step S107 and proceeds to step S108. If the operation signal for switching to the shooting mode is not input, the CPU 101 makes a negative determination in step S107 and proceeds to step S110.

  In step S108, the CPU 101 turns off the display by the liquid crystal display 104 when the reproduced image is displayed on the liquid crystal display 104, and turns off the projection by the projector 50 when the reproduced image is projected on the projector 50. Then, the process according to FIG. 34 ends. When the projector 50 turns off the projection image, a projection end instruction (control signal) is transmitted to the projector 50. Note that an off control signal for power-off processing may be transmitted together with the projection end instruction.

  In step S110, the CPU 101 determines whether the reproduction image data is a recorded image. When the image data for reproduction is a recorded image recorded on the memory card 150, the CPU 101 makes an affirmative decision in step S110 and returns to step S105, and the image data for reproduction is input from the external interface (I / F) 107. If the received image is a negative image, a negative determination is made in step S110, and the process returns to step S106.

  In step S111, the CPU 101 switches the image data for reproduction and proceeds to step S112. Specifically, each time the source switching operation is performed, the image data read from the memory card 150 and the image data input from the external interface (I / F) 107 are switched, and the process proceeds to step S112.

  In step S112, the CPU 101 determines whether the reproduction image data is a recorded image. When the reproduction image data is switched to the recorded image recorded on the memory card 150, the CPU 101 makes an affirmative decision in step S112, returns to step S104, reads the image data from the memory card 150, and reads the read image data. It is set as image data for reproduction. On the other hand, when the reproduction image data is switched to the image data input from the external interface (I / F) 107, the CPU 101 makes a negative determination in step S112 and returns to step S106. In this case, determination of frame advance / return operation is unnecessary.

  The CPU 101 treats a part of the operation member 103 as an operation member having a function different from that when the normal photographing lens is mounted until the mode switching operation is affirmed in step S107 after affirmative determination in step S102 of the flowchart described above. For example, when the release button is operated alone, it is not an operation member for instructing shooting, but is handled as an operation member for instructing the projector 50 to switch to the chart projection image for focus adjustment of “source 3”. . Further, when the release button is operated together with the cross key type operation member, it is handled as an operation member for a zoom adjustment instruction to the projector 50. When combined with an operation signal indicating the right direction, it is handled as a zoom-up instruction, and when combined with a signal indicating the left direction, it is handled as a zoom-down instruction.

  Furthermore, when the AF operation button is operated together with the cross key type operation member, it is handled as an operation member for a focus adjustment instruction to the projector 50. When combined with an operation signal indicating the right direction, it is treated as an instruction to the near side, and when combined with a signal indicating the left direction, it is treated as an instruction to the infinity side.

According to the sixth embodiment described above, the following operational effects can be obtained.
(1) Since the projector 50 is configured in the same cylindrical shape as the interchangeable lens barrel so that the projector 50 is mounted on the lens mount 110 for the interchangeable lens of the electronic camera 10H, the projector 50 is directly mounted on the electronic camera 10H without using a cable or an adapter. can do.

(2) When the projector 50 is mounted on the lens mount, the projector module has a horizontally long arrangement in which the longitudinal direction of the projection module is horizontal. Therefore, the projector 50 is less likely to interfere with the quick return mirror 131 in the electronic camera 10H as compared with the case of the vertically long arrangement. At least a part of the projection module can enter the space in the electronic camera 10H. As a result, the size of the projector 50 (in the left-right direction in FIG. 32A) can be reduced.

(3) In addition to the above (2), since the line CP passing through the center of the projection optical system is offset above the line CL passing through the center of the lens barrel of the projector 50, the projection module is moved to the space in the electronic camera 10H. It is possible to enter deeper. As a result, the size of the projector 50 (in the left-right direction in FIG. 32A) can be further reduced. Furthermore, by raising the position of the projection optical system, it is possible to reduce the possibility that the lower end of the projected light beam is placed on a mounting plane such as a desk.

(4) Since the focus ring 51 and the zoom ring 52 are provided in the projector 50 and the focus adjustment and zoom adjustment are performed by the projection optical system 221 in accordance with the operation amount of these operation rings, the same as in the case of a normal photographing lens. The focus and zoom of the projected image can be adjusted by rotating the screen. Thereby, a user-friendly camera system can be provided.

(5) Since the length HB from the attachment part 210 of the projector 50 to the outer edge of the lens barrel is configured to be less than the length HA from the lens mount 110 of the electronic camera 10H to the bottom surface of the camera casing, the projector 50 is With the camera 10H mounted, the bottom surface of the electronic camera 10H can be brought into close contact with the mounting plane. Further, when the length HB <the length HA, the support member 53 is disposed at the lower part of the lens barrel of the projector 50, whereby the mounting posture can be prevented from being inclined toward the projector 50 side. As a result, even when the electronic camera 10H equipped with the projector 50 is placed on an inclined surface, the placement posture can be kept stable.

(6) When the electronic camera 10H and the projector 50 are configured to be communicable and communication is established between the electronic camera 10H and the electronic camera 10H set in the playback mode, a projection start instruction (control signal) is sent from the electronic camera 10H to the projector 50. ) And playback data are transmitted, and the projector 50 automatically projects a playback image based on the playback data. Thereby, the liquid crystal display 104 of the electronic camera 10H can be turned off, the on operation of the LED light source 223) of the projector 50 and the projection image selection operation can be omitted, and the usability of the camera system is improved.

(7) The electronic camera 10H treats a part of the operation member 103 as an operation member having a function different from that when a normal photographing lens is mounted until an affirmative determination is made in step S107 after the determination in step S102 is affirmative. I made it. Thereby, it is not necessary to add a new operation member related to projection to the electronic camera 10H.

(Modification 24)
When the battery 204 is not loaded in the projector 50, the projector 50 may be configured to be operated by the power supplied from the electronic camera 10H to the projector 50 via the lens mount 110.

(Modification 25)
The projector 50 may be provided with a speaker. In this case, when there is sound data associated with the data file of the image to be projected, sound based on the sound data is reproduced from the speaker.

(Modification 26)
The projector 50 may be provided with a memory card slot. In this case, the projector 50 reads the image data from the memory card mounted in the slot, and projects a reproduced image based on the read image data. Further, when the projector 50 projects a reproduced image based on data transmitted from the electronic camera 10H, the image data may be stored in a memory card. By adopting such a configuration, it is not necessary to transmit image data during the second and subsequent projections of the same data, so that there is a merit that a response before projection is accelerated. Further, when the projector 50 is detached from the electronic camera 10H and operates as a single projector, there is an advantage that the image data can be used for projection.

(Modification 27)
The electronic camera 10H transmits a power-off instruction (control signal) to the projector 50 during the power-off process of the electronic camera 10H (including when the timer is off) according to the contents set in advance by menu setting or the like. You may comprise. In this case, when an operation signal instructing to turn off the power is input from the operation member 103, the CPU 101 of the electronic camera 10H transmits a power-off control signal to the projector 50 and performs a predetermined power-off process for the electronic camera 10H. . Receiving the power-off instruction, the CPU 201 of the projector 50 performs the projection end from the projection unit 220 and a predetermined power-off process for the projector 50.

(Modification 28)
Further, the electronic camera 10H may be configured to be able to switch whether or not to supply power to the projector 50 from the power supply circuit 108 of the electronic camera 10H according to the contents set in advance by menu setting or the like. The projector 50 is configured to use a voltage supplied from the electronic camera 10H instead of the battery 204 when the voltage of the battery 204 becomes a predetermined value or less. When the power is supplied from the electronic camera 10H to the projector 50, the current value supplied to the LED light source 223 may be increased more than usual, and the projection unit 220 may be controlled so that the projected image becomes brighter.

(Modification 29)
When the projection start instruction (control signal) and reproduction data are transmitted from the electronic camera 10H to the projector 50 and the reproduction image based on the data is projected by the projector 50, the projector 50 does not receive the data from the electronic camera 10H. The projector 50 may be configured to end the projection when the state continues for a predetermined time.

(Modification 30)
The electronic camera 10H and the projector 50 communicate and supply power via the terminals in the lens mount 110 and the attachment unit 210. The external interfaces (I / F) 107 and 202 of the electronic camera 10H and the projector 50, respectively. They may be connected with an external connection cable, and may be configured to perform communication or supply power via the connection cable.

(Modification 31)
The focus ring 51 and the zoom ring 52 may be omitted from the projector 50, and the projector 50 may be further downsized. FIG. 35 is a diagram illustrating a projector 50A in this case. The projector 50A performs zoom adjustment and focus adjustment when receiving a control signal transmitted from the electronic camera 10H. Since the operation ring (51, 52) is omitted, the size and weight are reduced, so that the center of gravity when the projector 50A is mounted on the electronic camera 10H is located on the electronic camera 10H side. As a result, the mounting posture on the plane can be stabilized without providing the support member 53 illustrated in FIG.

<Modification 1 of a projection module>
A modification of the optical system arrangement of the projection unit 220 will be described with reference to FIG. FIG. 36 is a modification of the optical system arrangement illustrated in FIG. 4 and is a view of the optical system of the projection unit 220 as viewed from above. Compared to the first embodiment (FIG. 4), the movement range of the mirror M1 and the arrangement position of the cooling block 230 are mainly different. Components common to those in FIG. 4 are denoted by common reference numerals and description thereof is omitted.

  In FIG. 36, an LED 223 is mounted on a rectangular aluminum substrate 251A (on a pattern formed on an insulating layer) constituting one plane in the longitudinal direction of a quadrangular prism shape, and condensing optics to the right of the LED light source 223. System 226 and PBS block 228 are glued together. A mirror M1 that bends light from the LED 223 toward the condensing optical system 226, and a mirror support member (not shown) that movably supports the mirror M1 are disposed outside the module. The point that the mirror M1 moves between the position indicated by the broken line and the position indicated by the alternate long and short dash line when the support member is driven by the actuator is the same as in the case of FIG.

  The mirror M1 only needs to move between at least a state of moving on the optical path from the LED light source 223 and a state of retreating from the optical path, and the moving direction is the above-described optical path direction (left-right direction in FIG. 36). It does not have to be. Further, the mirror M1 may be rotationally moved instead of the illustrated parallel movement.

  The cooling block 230 is disposed so as to cool the substrate 251A from the back side of the surface on which the LED light source 223 is mounted. As for the direction of intake and exhaust, for example, the air is taken in from the top in FIG. 36 and is exhausted in the direction (up) perpendicular to the paper surface.

  According to the configuration of FIG. 36, the distance between the LED light source 223 and the condensing optical system 226 can be narrowed compared to the case of FIG. 4, so that the size of the optical system in the lateral direction can be kept small.

<Second Modification of Projection Module>
FIGS. 37A and 37B are modifications of the optical system arrangement illustrated in FIG. 10 and are views of the optical system of the projection unit 220 as viewed from above. FIG. 37 (a) shows a case where the photographing auxiliary light is emitted, and FIG. 37 (b) shows a case where the projection light is emitted. Compared to the second embodiment (FIG. 10), the optical member 238 is disposed on the surface 228b side of the PBS block 228, the cooling block 230 is disposed instead of the heat radiating member 270, and the aluminum substrate is bent. 261A is different in that an opening is provided at a position facing the surface 228b of the PBS block 228. Constituent elements common to those in FIG. 10 are denoted by common reference numerals and description thereof is omitted.

  In FIG. 37, the optical member 238 is supported by a support member (not shown) so as to be movable along the surface 228b of the PBS block 228. When this support member is driven by an actuator (not shown), the optical member 238 is translated in the left-right direction in FIG.

  The optical member 238 includes a region 238b that has been subjected to non-reflection processing such as black processing, and a region 238a in which a quarter-wave plate and a reflection mirror are joined (a quarter-wave plate is disposed on the PBS block 228 side) Is formed. When the photographing auxiliary light is emitted (photographing mode), the optical member 238 is moved to the position shown in FIG. In this state, the polarized light beam incident on the PBS block 228 has its P-polarized component transmitted through the PBS block 228 and converted into an S-polarized component by the liquid crystal panel 222. In this case, the entire surface of the liquid crystal panel 222 is in a bright state in order to make the auxiliary light as bright as possible. That is, the light incident on the liquid crystal panel 222 is converted from P-polarized light to S-polarized light in all pixels. The converted S-polarized component light beam is again incident on the PBS block 228, reflected by the polarization separation unit 228 a in the PBS block 228, and emitted to the projection optical system 221. A polarizing plate 227 is disposed before the PBS block 228 is incident. The polarizing plate 227 is rotated about the optical axis, and the light incident on the PBS block 228 is adjusted to P-polarized light 50% and S-polarized light 50% with respect to the polarization separation surface of the PBS block 228.

  The S-polarized component of the polarized light beam incident on the PBS block 228 is reflected by the polarization separation unit 228a in the PBS block 228 and is incident on the region 238a of the optical member 238. The S-polarized component is reflected by the mirror in the region 238a and is incident on the PBS block 228 again. However, since the quarter-wave plate in the region 238a is arranged in a predetermined direction, the P-polarized light passes through it twice. It has been converted into a component. This P-polarized component passes through the PBS block 228 and is emitted to the projection optical system 221. In this way, in the configuration of FIG. 10 (the same applies to FIGS. 4 and 36), since the polarization component that has not been used (guided to the non-reflective treatment surface 228b and discarded) is also emitted, the configuration of FIG. In addition, the amount of auxiliary photographing light can be increased. The ratio of light incident on the liquid crystal panel 222 and the region 238 a can be changed by rotating the polarizing plate 227. Note that since the light emitted from the LED light source 223 is non-polarized light, the ratio of the light incident on the liquid crystal panel 222 and the region 238a can be made the same without providing the polarizing plate 227.

  When the projection light is emitted (projection mode), the optical member 238 is moved to the position shown in FIG. In this case, as in the case of FIG. 10 (the same applies to FIGS. 4 and 36), only the P-polarized component of the polarized light beam incident on the PBS block 228 is used (the S-polarized component is the non-reflective surface of the region 238b). Therefore, stray light can be suppressed and a high-quality projected image can be obtained.

  The optical member 238 may be moved from the PBS block 228 so that the region 238a or the region 238b is located on the upward optical path in FIGS. 37 (a) and 37 (b). ) And the left-right direction exemplified in (b). Further, the optical member 238 having the region 238a and the region 238b is formed in a disk shape, and the light that travels upward from the PBS block 228 in FIGS. 37 (a) and 37 (b) by rotating the disk-shaped optical member 238. The region 238a or the region 238b may be moved on the road.

  The mirror in the region 238a described above may have a curvature. When shooting auxiliary light is emitted by giving a magnification to the mirror (imaging mode), the range of the light beam emitted from the projection optical system 221 as a P-polarized component is emitted from the projection optical system 221 as an S-polarized component. It is possible to illuminate a wider range than the range of the luminous flux.

  The heat radiating member of the projection module may be replaced with a cooling block. FIG. 38 is a diagram illustrating an example in which a cooling block 230 is provided instead of the heat dissipation member 270 in the projection module illustrated in FIG. In accordance with the cooling method of the projection module, the heat radiation member 270 or the cooling block 230 including the cooling fan may be appropriately combined.

  The above description is merely an example, and the present invention is not limited to the configuration of the above embodiment. The first embodiment to the sixth embodiment, Modification Examples 1 to 31, and Modification Examples 1 and 2 of the projection module may be configured by appropriately combining them.

  The present invention has been described with reference to an electronic camera with a built-in PJ. However, as long as the projector 220 is mounted, a projection device, a cellular phone with a built-in PJ, a PDA with a built-in PJ (personal digital assistant), a recording / playback device with a built-in PJ, etc. It can be applied to other electronic devices.

It is the figure which looked at the PJ built-in electronic camera by 1st embodiment of this invention from diagonally forward. It is the figure which looked at the electronic camera with a built-in PJ from behind. It is a block diagram explaining the circuit structure of a PJ built-in electronic camera. (a) is the top view which looked at the optical system of the projection part from the top, (b) is a left view. (a) is the front view which looked at the optical system of the projection part from the front, (b) is a left view. It is a flowchart explaining the flow of the process which CPU performs in projection mode. It is a flowchart explaining the detail of a projection adjustment process. It is a flowchart explaining the detail of a check process. It is the figure which looked at the PJ built-in electronic camera by the modification 8 from the front. It is the top view which looked at the optical system of the projection part by a second embodiment from the top. It is the front view which looked at the optical system of Drawing 11 from the front. It is a side view of a PJ built-in electronic camera, (a) is a diagram showing a state of moving the projection unit to the storage position, (b) is a diagram showing a state of moving the projection unit to the use position. It is a side view of the PJ built-in electronic camera by the modification 9, (a) is a figure which shows the state which moved the projection part to the storing position, (b) is a figure which shows the state which moved the projection part to the use position. is there. It is a side view of the PJ built-in electronic camera by the modification 10, (a) is a figure which shows the state which moved the projection part to the storing position, (b) is a figure which shows the state which moved the projection part to the use position. is there. It is a front view of the electronic camera with a built-in PJ according to the third embodiment. It is a figure showing the state by which the projection part of the electronic camera with a built-in PJ of FIG. 15 was enabled, (a) is a top view, (b) is a front view, (c) is a bottom view. 14 is a front view of an electronic camera with a built-in PJ according to Modification 11. FIG. It is a figure showing the state by which the projection part of the electronic camera with a built-in PJ of FIG. 17 was enabled, (a) is a top view, (b) is a front view, (c) is a bottom view. It is the figure which looked at the electronic camera with a built-in PJ according to the fourth embodiment from the front. It is a figure explaining the electronic camera with a built-in PJ by the modification 14. It is a figure explaining the electronic camera with a built-in PJ by the modification 15. It is a figure explaining the electronic camera with a built-in PJ by the modification 16. It is a figure which illustrates the electronic camera with a built-in PJ by 5th embodiment, (a) is a front view, (b) is a side view. It is a figure explaining the lean position posture which took a photography lens down. It is a figure which illustrates the electronic camera with a built-in PJ which attached the lens cap and imaging lens by the modification 17, (a) is a front view, (b) is a side view. It is a figure explaining the modification which correct | amends the inclination of a PJ built-in electronic camera, (a) is a general view, (b) is a side view. It is a side view which illustrates the horizontal stabilizer of a PJ built-in electronic camera. It is a side view which illustrates the horizontal stabilizer of a PJ built-in electronic camera. It is a side view which illustrates the vertical stabilizer of a PJ built-in electronic camera. It is a figure which illustrates the vertical stabilizer of an electronic camera with a built-in PJ, (a) shows a folded state, (b) shows a rotating state. It is a block diagram explaining the circuit structure of the camera system by 6th embodiment. It is a figure which illustrates a camera system, (a) is a front view, (b) is a side view. It is a flowchart explaining the flow of the process which CPU of a projector performs. It is a flowchart explaining the flow of the process which CPU of an electronic camera performs. It is a figure which illustrates the projector which abbreviate | omitted the focus ring and the zoom ring. It is a figure explaining the modification of the optical system arrangement | positioning of a projection part. It is a figure explaining the modification of the optical system arrangement | positioning of a projection part, (a) is a figure which shows the case where imaging assistance light is inject | emitted, (b) is a figure which shows the case where emission light is emitted. It is the top view which looked at the modification of the projection part from the top. It is an enlarged view of a PBS block and a liquid crystal panel, (a) is a figure which shows the case where a cover glass is abbreviate | omitted, (b) is a figure which shows the case where it has a cover glass.

Explanation of symbols

10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10K, 10L, 10M, 10N ... PJ built-in electronic camera 10H ... Electronic camera 11 ... Shooting lens 11C, 11D ... Lens cap 14 ... Release button 15 ... Mode switch Dial 16 ... zoom switch 22 ... main switch 26 ... outside housing 28 ... inside housing 30 ... elastic member 31 ... memory holder 34 ... strap 36, 36A ... horizontal stabilizer 36B, 37 ... vertical stabilizer 50, 50A ... projector 51 ... Focus ring 52 ... Zoom ring 53 ... Support members 101, 201 ... CPU
103, 206 ... operation member 104 ... liquid crystal display 104B ... liquid crystal back panel 110 ... lens mount 111 ... attitude sensor 112 ... photometric device 113, 207 ... temperature sensor 120 ... imaging unit 121 ... imaging optical system 122 ... imaging element 131, M1 M2 ... Mirror 150 ... Memory card 210 ... Mounting part 220 ... Projection part 221 ... Projection optical system 222 ... Liquid crystal panel 228 ... PBS block 223 ... LED light source 230 ... Cooling block 238 ... Optical member 251 ... Substrate 252c ... Fitting member 270 ... Heat dissipation member 272 ... Heat conduction member S ... Space

Claims (3)

An imaging optical system that is arranged to project from the front of the camera housing and guides the subject image to the image sensor,
A projection unit that has a projection optical system and projects an optical image in a front direction of the housing;
Moving means for moving the projection means between a use position and a storage position;
The camera according to claim 1, wherein the use position is such that the projection optical system is farther from the photographing optical system than the storage position so that an optical image projected by the projection means is not shifted by the photographing optical system. The camera of claim 1,
The projection means includes a light source part and a heat radiating member that radiates heat from the light source part, and a heat conduction member made of a heat conductive material is provided between the heat radiating member and the camera housing. A camera comprising a member. The camera according to claim 2,
The projection means includes a metal substrate to which the light source unit and the heat dissipation member are attached,
The heat radiating member conducts heat from the light source conducted through the metal substrate to the camera casing through the heat conducting member.

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