JP2009159394A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electronic equipment capable of confirming a projection range even without projection on a projector. <P>SOLUTION: The electronic equipment includes: projection units 1a, 22, 22a, 22b and 27a; imaging units 2a, 23, 24 and 27b; and a signal generating means 25 which generates a signal for displaying, on a display device 6, a projection range of the projection units 1a, 22, 22a, 22b and 27a, together with images captured by the imaging units 2a, 23, 24 and 27b, during no projection of the projection units 1a, 22, 22a, 22b and 27a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic apparatus including a projection unit and an imaging unit.

  A technique for capturing a projected image by a projector with a camera and displaying the captured monitor image is known (see Patent Document 1).

JP 2006-236195 A

  In the prior art, there is a problem that the projection range cannot be confirmed unless the projector is projected.

(1) An electronic apparatus according to the present invention generates a signal for causing a display device to display a projection range of a projection unit, an imaging unit, and an image acquired by the imaging unit when the projection unit is not projected. And a signal generation means.
(2) In the electronic apparatus according to (1), the signal generation unit may be configured to display an image obtained by the imaging unit according to a distance between the optical axis of the optical system on the projection unit side and the optical axis of the optical system on the imaging unit side. The shape showing the projection range can be changed with.
(3) In the electronic apparatus according to the first aspect, the signal generation unit can change the shape indicating the projection range on the image acquired by the imaging unit according to the distance projected by the projection unit.
(4) In the electronic device according to the third aspect, the distance to be projected can be obtained from the position information of the optical system after focus adjustment by the imaging unit.
(5) The electronic apparatus according to claim 4 may further include a determination unit that determines a focus adjustment amount of the optical system on the projection unit side in accordance with a projection distance.
(6) In the electronic device according to any one of claims 1 to 5, the signal generation unit changes a shape indicating a projection range on an acquired image by the imaging unit according to a projection angle of view by the projection unit. You can also.
(7) In the electronic device according to any one of claims 1 to 6, the signal generation unit can change the shape of the projection range on the image acquired by the imaging unit according to the attitude of the electronic device.
(8) In the electronic apparatus according to any one of claims 1 to 7, the signal generation unit can generate a signal for displaying a projection range together with an image repeatedly acquired by the imaging unit.
(9) In the electronic device according to any one of claims 1 to 8, the signal generation unit can generate a signal for displaying a projection range together with a still image acquired by the imaging unit.
(10) In the electronic apparatus according to any one of claims 1 to 9, the signal generation means can generate a signal for causing the display device to perform display for a predetermined time.
(11) In the electronic device according to any one of claims 1 to 10, a display device may be provided in the main body.

  In the electronic apparatus according to the present invention, the projection range can be confirmed without projecting the projector.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view including a front surface of an electronic camera 100 with a projector according to an embodiment of the present invention. In FIG. 1, a photographing aperture 2, a projection aperture 1, a flash light window 3, and an AF auxiliary light window 12 are arranged on the front surface of the electronic camera with a projector 100. An interval in the horizontal direction (distance of the opening center) between the photographing opening 2 and the projection opening 1 is d. Further, the height from the bottom surface of the electronic camera with projector 100 to the center position of the photographing aperture 2 and the projection aperture 1 is common.

  A release button 4 and a power button 5 are disposed on the upper surface of the electronic camera 100 with a projector. The release button 4 is an operation member for instructing the electronic camera with a projector 100 to shoot. The power button 5 is an operation member for turning on / off the electronic camera 100 with a projector.

  FIG. 2 is a perspective view including the back surface of the electronic camera 100 with a projector. In FIG. 2, the rear display module 6, zoom switches 7a and 7b, mode switch 8, menu switch 9, delete switch 10, cross switch 11a, and OK switch 11b are provided on the back of the electronic camera 100 with a projector. And are provided. The cross switch 11a configured in a ring shape generates an operation signal corresponding to the pressed position. The arrangement position of the OK switch 11b is the center of the cross switch 11a. The cross switch 11a and the OK switch 11b are operation members for instructing the electronic camera 100 with a projector to perform various settings.

  The zoom switches 7a and 7b are operation members for instructing the electronic camera 100 with a projector to zoom down (7a) or zoom up (7b). The mode switch 8 is an operation member for instructing the electronic camera 100 with a projector to switch between a photographing mode for photographing, a reproduction mode for reproducing and displaying a photographed image, and a projection mode for projecting a photographed image. .

  The menu switch 9 is an operation member for displaying a menu selection screen on the rear display module 6. The deletion switch 10 is an operation member for instructing the electronic camera 100 with a projector to delete an image file.

  FIG. 3 is a block diagram illustrating a schematic configuration of the electronic camera 100 with a projector. 3, an electronic camera with a projector 100 includes an arithmetic circuit 21, an image processing unit 23, an image sensor 24, a photographing lens group 2a, a projector control unit 22, a light source module 22a, a display module 22b, and a projection. Lens group 1a, display control unit 25, rear display module 6, backlight drive unit 26, backlight 29, lens drive control unit 27, light emitting device 3a, recording medium mounting unit 28, and AF assist The light source 12a and each switch group mentioned above are included.

  The arithmetic circuit 21 sends out a control signal to each part of the projector-equipped electronic camera 100 by performing predetermined computation using signals input from each part of the projector-equipped electronic camera 100 based on the control program. Thus, the camera operation and the projector operation are respectively controlled. The control program is stored in a nonvolatile memory (not shown) in the arithmetic circuit 21. The arithmetic circuit 101 further performs trapezoidal distortion correction (keystone correction) on the image data projected from the projection lens group 1a by image processing.

  The display control unit 25 generates a display signal for displaying information such as an image and text on the rear display module 6 according to an instruction from the arithmetic circuit 21. The rear display module 6 receives the display signal generated by the display control unit 25 and displays information such as an image and text. The backlight drive unit 26 supplies power to the backlight 29 that illuminates the rear display module 6 according to an instruction from the arithmetic circuit 21. The backlight 29 receives power supplied from the backlight driving unit 26 and turns on the backlight 29.

  The lens drive control unit 27 includes a first control unit 27a that drives the projection lens group 1a and a second control unit 27b that drives the photographing lens group 2a. The second control unit 27b moves a zoom lens (not shown) constituting the photographing lens group 2a forward and backward in the optical axis direction in response to an instruction from the arithmetic circuit 21. As a result, the shooting angle of view captured by the image sensor 24 is adjusted. The second control unit 27b further drives a focus lens (not shown) constituting the photographing lens group 2a to advance and retreat in the optical axis direction based on a focus adjustment instruction from the arithmetic circuit 21. Thereby, focus adjustment is performed.

  The first control unit 27a moves a zoom lens (not shown) constituting the projection lens group 1a forward and backward in the optical axis direction in response to an instruction from the arithmetic circuit 21. Thereby, the projection angle of view to be projected is adjusted. The first control unit 27a further drives a focus lens (not shown) constituting the projection lens group 1a forward and backward in the optical axis direction based on a focus adjustment instruction from the arithmetic circuit 21. Thereby, focus adjustment is performed.

  The light emitting device 3a emits a predetermined amount of light according to an instruction from the arithmetic circuit 21 in the photographing mode. The light emitted from the light emitting device 3a is emitted from the flash light window 3 to the front of the electronic camera 100 with a projector to illuminate the subject.

  The recording medium mounting unit 28 is configured to be capable of mounting a non-volatile recording medium such as a memory card. A recording medium (not shown) mounted on the recording medium mounting unit 28 can write, store, and read data such as image data processed by the image processing unit 23 according to an instruction from the arithmetic circuit 21. .

  The AF auxiliary light source 12a emits light of a predetermined pattern (for example, a circular shape) in response to an instruction from the arithmetic circuit 21 at the time of camera focus adjustment described later. The light emitted from the AF auxiliary light source 12a is emitted from the AF auxiliary light window 12 to the front of the electronic camera with projector 100 to illuminate the subject.

(The camera module)
The camera module includes a photographic lens group 2a, an image sensor 24, an image processing unit 23, and a second control unit 27b. As the imaging element 24, a CCD image sensor, a CMOS image sensor, or the like is used. In response to an instruction from the arithmetic circuit 21, the image processing unit 23 performs predetermined image processing on the imaging signal (accumulated charge signal) output from the imaging element 24. Image processing includes white balance processing and gamma processing.

  The taking lens group 2 a forms a subject image on the image pickup surface of the image pickup device 24. The image processing unit 23 reads an image pickup signal from the image pickup element 24 that has picked up an image in response to a shooting start instruction from the arithmetic circuit 21, performs the above image processing, and sends it to the arithmetic circuit 21 as image data.

(Camera focus adjustment)
The arithmetic circuit 21 in the case of performing autofocus adjustment includes an integrated value of high frequency components (so-called focus evaluation) for an image signal corresponding to a focus detection area (for example, the center of the shooting screen) among image signals captured by the image sensor 24. A focus adjustment instruction is sent to the second control unit 27b so as to maximize the value. The position of the focus lens that maximizes the focus evaluation value is a focus position that eliminates blurring of the edge of the subject image captured by the image sensor 24 and maximizes the contrast of the image. As described above, AF auxiliary light is emitted from the AF auxiliary light window 12.

(Camera zoom adjustment)
The camera module adjusts the optical zoom of the photographing lens group 2a by shifting the zoom lens constituting the photographing lens group 2a in the optical axis direction. The arithmetic circuit 21 sends a zoom adjustment signal to the second control unit 27b according to the zoom operation signals from the zoom switches 7a and 7b.

(Projector module)
The projector module includes a projection lens group 1a, a projector control unit 22, a light source module 22a, a display module 22b, and a first control unit 27a. The projector control unit 22 supplies a drive current to the light source module 22a according to the projection instruction output from the arithmetic circuit 21. The light source module 22a illuminates the display module 22b with brightness according to the supply current. The display module 22b is configured by a liquid crystal panel.

  The projector control unit 22 further generates a drive signal for driving the display module 22b according to the image data sent from the arithmetic circuit 21, and drives the display module 22b with the generated drive signal. Specifically, a voltage corresponding to the image signal is applied to the liquid crystal layer of the display module 22b for each pixel. In the liquid crystal layer to which a voltage is applied, the arrangement of liquid crystal molecules changes, and the light transmittance of the liquid crystal layer changes. Thus, the display module 22b generates a light image by modulating the light from the light source module 22a in accordance with the image signal. The projection lens group 1a emits the generated light image from the projection port 1 toward a screen or the like.

  Based on the focus adjustment signal output from the arithmetic circuit 21, the first controller 27a drives a focus lens (not shown) constituting the projection lens group 1a to advance and retreat in the optical axis direction. The first control unit 27a further drives a zoom lens (not shown) constituting the projection lens group 1a forward / backward in the optical axis direction based on the zoom adjustment signal output from the arithmetic circuit 21. The focus adjustment amount and the zoom adjustment amount are instructed from the arithmetic circuit 21 to the first control unit 27a.

(Keystone correction of projected image)
The arithmetic circuit 21 performs electrical keystone correction by image processing to correct the projection image from a trapezoidal shape to a rectangular shape. The memory in the arithmetic circuit 21 stores a correction value for correcting the projected image into a square shape in advance. The arithmetic circuit 21 reads a correction value from the memory in accordance with the irradiation pattern shape of the AF auxiliary light source 12a in the monitor image, which will be described later, and performs a keystone correction process on the projection image data on the memory based on the read correction value. The image data after the correction process is sent to the projector control unit 22. The arithmetic circuit 21 decreases the correction value for the keystone correction amount as the irradiation pattern shape is closer to the circular shape, and increases the keystone correction amount as the distortion from the circular shape of the irradiation pattern shape increases.

(Focus adjustment of projected image)
The arithmetic circuit 21 adjusts the focus of the projection image by the projector module by shifting the focus lens constituting the projection lens group 1a in the optical axis direction. The arithmetic circuit 21 sends a focus adjustment signal to the first control unit 27a in accordance with an operation signal from the operation member.

(Zoom adjustment of projected image)
The arithmetic circuit 21 adjusts the zoom of the projected image by the projector module by shifting the zoom lenses constituting the projection lens group 1a in the optical axis direction. The arithmetic circuit 21 sends a zoom adjustment signal to the first control unit 27a in accordance with an operation signal from the operation member.

  Since the present embodiment has a feature in the operation before the projection in the projection mode, the following description will be focused on this point. FIG. 4 is a diagram illustrating a scene in which an image or the like is projected onto the screen 200 on the wall 210 from the electronic camera 100 with a projector. The user determines the mounting posture of the projector-equipped electronic camera 100 while changing the orientation of the projector-equipped electronic camera 100 with respect to the screen 200 on a table (not shown). The electronic camera with a projector 100 in this case causes the rear display module 6 to display a display 201b indicating a projection range that will be projected from the projector module.

  A flow of processing executed by the arithmetic circuit 21 to display the shape indicating the projection range on the rear display module 6 will be described with reference to a flowchart of FIG. When the electronic camera with projector 100 is in the projection mode, for example, when the deletion switch 10 is operated, the arithmetic circuit 21 activates a program that performs the processing shown in FIG.

  In step S1 of FIG. 7, the arithmetic circuit 21 determines whether or not the zoom position of the taking lens group 2a is at the wide end. When the lens position information acquired from the lens drive control unit 27 (second control unit 27b) indicates the wide end (most wide angle side), the arithmetic circuit 21 makes an affirmative determination in step S1 and proceeds to step S2. If the acquired lens position information is different from the wide end, the arithmetic circuit 21 makes a negative determination in step S1 and proceeds to step S9.

  In step S9, the arithmetic circuit 21 sends an instruction to the lens drive control unit 27 (second control unit 27b), moves the zoom lens constituting the photographing lens group 2a to the wide end, and proceeds to step S2. Thereby, the angle of view captured by the image sensor 24 is widely changed.

  In step S2, the arithmetic circuit 21 activates the camera module to start imaging (through image), and proceeds to step S3. The arithmetic circuit 21 further sends through image data sequentially to the display control unit 25 to display a monitor image on the rear display module 6. Since the monitor images are sequentially displayed on the rear display module 6 of the electronic camera with projector 100, the user adjusts the mounting posture of the electronic camera with projector 100 so that the screen 200 is included in the monitor image. A square 200 a displayed on the rear display module 6 in FIG. 4 corresponds to the outline of the screen 200.

  In step S3, the arithmetic circuit 21 detects the distance to the screen 200 and proceeds to step S4. The arithmetic circuit 21 uses the focus lens position information of the photographing lens group 2a acquired from the lens drive control unit 27 (second control unit 27b) after the autofocus adjustment on the camera module side to the main subject (in this case, the screen 200). Calculate the distance. Data indicating the relationship between the focus lens position and the subject distance is stored in the memory in the arithmetic circuit 21 in advance.

  The arithmetic circuit 21 further determines the keystone correction amount described above in accordance with the irradiation pattern shape of the AF auxiliary light in the monitor image acquired during the autofocus adjustment. When the start of projection is instructed after the processing of FIG. 7 is finished, the keystone correction processing is performed on the projection image data using this keystone correction amount, and the image data after the keystone correction processing is sent to the projector control unit 22. Further, the projection range calculated in step S6 described later is a projection range when keystone correction is performed.

  In step S4, the arithmetic circuit 21 determines whether or not the distance to the projection object (in this case, the screen 200) is too far. The arithmetic circuit 21 makes an affirmative decision in step S4 when the distance is longer than a predetermined distance (for example, 2 m), and proceeds to step S10. The arithmetic circuit 21 makes a negative determination in step S4 if the distance is equal to or less than a predetermined distance (for example, 2 m), and proceeds to step S5.

  In step S10, the arithmetic circuit 21 sends an instruction to the display control unit 25 to display, for example, a warning message “Projection object is too far” on the rear display module 6 for a predetermined time (for example, 5 seconds), and the processing shown in FIG. Exit. In this case, since the brightness of the projection image may be insufficient, the user is prompted to change the projection condition.

  In step S5, the arithmetic circuit 21 determines whether or not the distance to the projection object (in this case, the screen 200) is too close. The arithmetic circuit 21 makes an affirmative decision in step S5 when the distance is shorter than a predetermined distance (for example, 20 cm), and proceeds to step S11. The arithmetic circuit 21 makes a negative determination in step S5 if the distance is equal to or less than a predetermined distance (for example, 20 cm), and proceeds to step S6.

  In step S11, the arithmetic circuit 21 sends an instruction to the display control unit 25 to display, for example, a warning message “Projection object is too close” on the rear display module 6 for a predetermined time (for example, 5 seconds), and the processing shown in FIG. Exit. In this case, since the projection image may be too bright, the user is prompted to change the projection condition.

  In step S6, the arithmetic circuit 21 determines the distance to the projection target (in this case, the screen 200), the field of view by the photographing lens group 2a (stored in the memory in the arithmetic circuit 21 as design information), The projection range 201 on the screen 200 is calculated using the projection angle of view by the projection lens group 1a (stored in the memory in the arithmetic circuit 21 as design information), and the process proceeds to step S7. Details of the calculation contents will be described later.

  In step S7, the arithmetic circuit 21 sends an instruction to the display control unit 25, displays the frame 201b indicating the projection range on the monitor image displayed on the rear display module 6, and proceeds to step S8. In FIG. 4, a frame 201 b indicating the projection range is displayed on the inner side of the quadrangle 200 a displayed on the rear display module 6.

  In step S8, the arithmetic circuit 21 determines whether or not the display has been performed for a predetermined time. The arithmetic circuit 21 makes an affirmative decision in step S8 when a predetermined time (for example, 10 seconds) has been counted after the display is started, and ends the process of FIG. The arithmetic circuit 21 stops the camera module and also stops the display by the rear display module 6. Also, a focus adjustment instruction is sent to the first control unit 27a, and the focus lens is moved to a position corresponding to the distance to the main subject (in this case, the screen 200). Data indicating the relationship between the focus lens position and the subject distance is stored in the memory in the arithmetic circuit 21 in advance. Accordingly, when the start of projection is instructed after the processing of FIG. 7 is finished, the focus adjustment on the projector module side can be performed in advance so that the projected image is sharp on the screen 200.

  If the arithmetic circuit 21 does not measure a predetermined time (for example, 10 seconds) after the start of display, the arithmetic circuit 21 makes a negative determination in step S8 and repeats the determination process.

The calculation contents of the projection range will be described with reference to FIGS. FIG. 5 is a view of the electronic camera with projector 100 and the wall 210 as seen from above. 5, and parallel to the optical axis Ax of the optical axis Ax _P of the projection lens unit 1a photographing lens unit 2a, the horizontal distance between the two optical axes is d. A wall 210 on which the screen 200 is provided is located at a distance L from the electronic camera 100 with a projector.

The distance d is known from the design information of the camera body, and the angle θ is known from the design information of the photographing lens group 2a. The angle theta _P is known from design information of the projection lens unit 1a. Angle theta in accordance with the zoom position, but the angle theta _P changes may be converted from each of the zoom movement amount. Therefore, if the distance L to the screen 200 is obtained in step S3, the projection range within the photographing range is obtained by the following calculation.

The horizontal shooting range χ of the half angle θ of the horizontal field angle is calculated by the following equation (1).
χ = L × tanθ (1)
Further, the horizontal projection range χ _P of the half angle θ _P of the horizontal field angle is calculated by the following equation (2).
χ _P = L × tan θ _P (2)

When the left and right projection ranges with respect to the optical axis Ax of the photographic lens group 2a are represented by χ _PL (left side) and χ _PR (right side), the following expressions (3) and (4) are established.
χ _PL = χ _P −d = L × tan θ _P −d (3)
χ _PR = χ _P + d = L × tan θ _P + d (4)

When the ratio of the projection range chi _PL for imaging range of the left of the optical axis Ax of the taking lens unit 2a chi P _L, and the right proportion of the projection range chi _PL for imaging range chi of the optical axis Ax represented by P _R, the following Equations (5) and (6) hold.
P _L = χ _PL / χ = (L × tan θ _P −d) / (L × tan θ) (5)
P _R = χ _PR / χ = (L × tan θ _P + d) / (L × tan θ) (6)

Arithmetic circuit 21 displays the left side of the frame 201b that indicates the projection range in the position represented by the ratio P _L in the left half of the back surface display module 6. Specifically, when P _L = 1, the left side of the frame 201b coincides with the left end of the display screen of the rear display module 6 (= the left end of the left imaging range χ), and when P _L = 0.5 The left side of the frame 201b is ¼ from the left end of the display screen of the rear display module 6 (= the center of the left imaging range χ).

Similar arithmetic circuit 21 displays the right side of the frame 201b that indicates the projection range in the position represented by the ratio P _R in the right half of the back surface display module 6. Specifically, when P _R = 1, the right side of the frame 201b coincides with the right edge of the display screen of the rear display module 6 (= the right edge of the right imaging range χ), and when P _R = 0.5. The right side of the frame 201b is 1/4 (= the center of the right imaging range χ) from the right end of the display screen of the rear display module 6.

FIG. 6 is a view of the electronic camera with projector 100 and the wall 210 as seen from the side (horizontal direction). 6, the point where the optical axis Ax _P of the projection lens unit 1a and the optical axis Ax of the taking lens unit 2a overlaps is different from the case of FIG.

The angle Δ is known from the design information of the photographing lens group 2a. The angle delta _P is known from design information of the projection lens unit 1a. Angle delta in accordance with the zoom position, but the angle delta _P changes may be converted from each of the zoom movement amount. Therefore, if the distance L to the screen 200 is obtained in step S3, the projection range within the photographing range is obtained by the following calculation.

The vertical shooting range y of the half angle Δ of the vertical field angle is calculated by the following equation (7).
y = L × tanΔ (7)
The projection range y _P in the vertical direction of the byte content delta _P in the vertical direction of the angle is calculated by the following equation (8).
y _P = L × tan Δ _P (8)

When representing the proportion of the projection range y _P against the upper side of the imaging range y of the optical axis Ax of the taking lens unit 2a in Py, the following equation (9) holds.
Py = y _P / y = tan Δ _P / tan Δ (9)
According to equation (9), the ratio Py is independent of the distance L to the screen 200.

  The arithmetic circuit 21 displays the upper side of the frame 201b indicating the projection range at the position represented by the ratio Py in the upper half of the rear display module 6. Specifically, when Py = 1, the upper side of the frame 201b coincides with the upper end of the display screen of the rear display module 6 (= the upper end of the upper shooting range y), and when Py = 0.5, the frame 201b. Of the upper side of the display screen of the rear display module 6 is ¼ (= the center of the upper imaging range y).

The same applies to the percentage Py projection range y _P for photographing range y of the lower side of the optical axis Ax of the taking lens unit 2a. That is, when Py = 1, the lower side of the frame 201b coincides with the lower end of the display screen of the rear display module 6 (= the lower end of the lower shooting range y), and when Py = 0.5, the lower side of the frame 201b The lower side is ¼ (= the center of the lower imaging range y) from the lower end of the display screen of the rear display module 6.

Note that when viewed projector-equipped electronic camera 100 and the wall 210 from the side (horizontal direction), when the optical axis Ax _P of the projection lens unit 1a and the optical axis Ax of the taking lens unit 2a do not overlap, the optical axis The same calculation as in FIG. 5 may be performed, where dh is the distance in the vertical direction between Ax _P and the optical axis Ax.

According to the embodiment described above, the following operational effects can be obtained.
(1) Since the monitor image obtained by imaging the screen 200 with the camera module is displayed on the rear display module 6 and the shape 201b indicating the projection range by the projector module is displayed on the screen 200b on the display screen, the user can The projection range within the shooting range can be confirmed without projecting the projector module. Accordingly, it is possible to suppress battery consumption and prevent the observer from knowing the projection contents during preparation for installation of the projector-equipped electronic camera 100.

(2) If the distance d between the optical axis Ax of the optical axis Ax _P of the projection lens unit 1a photographing lens unit 2a is different. Thus various shapes 201b indicating the projection range, the electronic device having a parallax The present invention can be applied.

(3) Since the distance L to the screen 200 is obtained from the focus lens position information after the autofocus adjustment on the camera module side, it is not necessary to provide a dedicated distance measuring sensor.

(4) When the distance L to the screen 200 is different, the shape 201b of the frame indicating the projection range is made different. The present invention can also be applied to.

(5) Since the focus lens on the projector module side is moved to a position corresponding to the distance L acquired on the camera module side, a sharp projection image can be obtained on the screen 200 when the start of projection is instructed.

(6) If the photographing field angle by the photographic lens unit 2a theta, projection angle theta _P by the projection lens unit 1a different. Thus various shapes 201b of frame indicating a projection range, when the zoom state is different The present invention can also be applied.

(7) Since the keystone correction amount is determined in accordance with the irradiation pattern shape of the AF auxiliary light in the monitor image acquired during autofocus adjustment, there is no distortion on the screen 200 when the start of projection is instructed. A projected image is obtained.

(8) Since the time for displaying the frame shape 201b indicating the projection range by the projector module on the monitor image is limited to a predetermined time, battery consumption can be suppressed.

(Modification 1)
In the above description, the keystone correction amount is determined according to the irradiation pattern shape of the AF auxiliary light. Instead, the electronic camera with a projector 100 may be provided with an attitude detection sensor, and the keystone correction amount may be determined according to a detection signal from the attitude detection sensor.

(Modification 2)
Instead of determining the keystone correction amount, the frame shape 201b indicating the projection range may be deformed according to the irradiation pattern shape of the AF auxiliary light or the detection signal from the posture detection sensor. In this case, the arithmetic circuit 21 causes the rear display module 6 to display a frame 201b indicating a projection range that will be projected from the projector module without performing keystone correction. For example, when it is determined from the irradiation pattern shape of the AF auxiliary light or the detection signal from the posture detection sensor that the projection optical axis Ax _P of the electronic camera with projector 100 is oriented upward from the horizontal direction, In response, the length of the upper side of the quadrangle constituting the frame 201b is deformed longer than the length of the lower side. By displaying the trapezoidal frame on the monitor image of the rear display module 6, the user can be prompted to change the projection condition.

(Modification 3)
Although the electronic camera 100 with a projector displays the frame 201b indicating the monitor image and the projection range on the rear display module 6, it may be displayed on an eyepiece type electronic viewfinder instead of the rear display module 6.

(Modification 4)
Although the electronic camera with a projector 100 displays the frame 201b indicating the projection range superimposed on the through image as the monitor image, the frame 201b indicating the projection range may be displayed superimposed on the still image. In this case, when the release button 4 is pressed, the electronic camera with a projector 100 acquires a captured image for one frame, and displays a frame 201b indicating a projection range on the acquired image.

(Modification 5)
In this description, the distance to the screen 200 is calculated from the focus lens position information after the autofocus adjustment on the camera module side (step S3). Instead of this, the distance may be measured by a dedicated distance measuring sensor.

(Modification 6)
In the above description, the projector-equipped electronic camera 100 has been described as an example. However, the present invention can be applied to any electronic apparatus including a projection unit and an imaging unit. In this case, instead of displaying the monitor image and the frame 201b indicating the projection range on the display module installed in the electronic device, a video signal for displaying the monitor image and the frame 201b indicating the projection range is output to the external display device. You may comprise.

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

1 is a perspective view including a front surface of an electronic camera with a projector according to an embodiment of the present invention. It is a perspective view including the back surface of the electronic camera with a projector. It is a block diagram explaining schematic structure of the electronic camera with a projector. It is a figure which illustrates the scene which projects an image etc. on a screen. It is the figure which looked at the electronic camera with a projector and a wall from the top. It is the figure which looked at the electronic camera with a projector and the wall from the side. It is a flowchart explaining the flow of the process which an arithmetic circuit performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Projection lens group 2a ... Shooting lens group 6 ... Back surface display module 21 ... Arithmetic circuit 22 ... Projector control part 22a ... Light source module 22b ... Display module 23 ... Image processing part 24 ... Imaging element 25 ... Display control part 27 (27a, 27b) ... Lens drive control unit 100 ... Electronic camera with projector 200 ... Screen 201b ... Frame 210 ... Wall

Claims (11)

A projection unit;
An imaging unit;
An electronic apparatus comprising: a signal generation unit configured to generate a signal for causing a display device to display a projection range of the projection unit together with an image acquired by the imaging unit when the projection unit is not projected. The electronic device according to claim 1,
The signal generation unit changes a shape indicating the projection range on an image acquired by the imaging unit according to a distance between an optical axis of the optical system on the projection unit side and an optical axis of the optical system on the imaging unit side. An electronic device characterized by that. The electronic device according to claim 1,
The electronic apparatus according to claim 1, wherein the signal generation unit changes a shape indicating the projection range on an image acquired by the imaging unit in accordance with a distance projected by the projection unit. The electronic device according to claim 3,
The electronic apparatus is characterized in that the projection distance is obtained from position information of an optical system after focus adjustment by the imaging unit. The electronic device according to claim 4,
An electronic apparatus, further comprising: a determination unit that determines a focus adjustment amount of the optical system on the projection unit side according to the projection distance. In the electronic device as described in any one of Claims 1-5,
The electronic apparatus according to claim 1, wherein the signal generation unit changes a shape indicating the projection range on an acquired image by the imaging unit in accordance with a projection angle of view by the projection unit. In the electronic device as described in any one of Claims 1-6,
The electronic device according to claim 1, wherein the signal generation unit changes a shape of the projection range on an image acquired by the imaging unit in accordance with an attitude of the electronic device. In the electronic device as described in any one of Claims 1-7,
The electronic apparatus according to claim 1, wherein the signal generation unit generates a signal for displaying the projection range together with an image repeatedly acquired by the imaging unit. In the electronic device as described in any one of Claims 1-8,
The electronic apparatus according to claim 1, wherein the signal generation unit generates a signal for displaying the projection range together with a still image acquired by the imaging unit. In the electronic device as described in any one of Claims 1-9,
The electronic device is characterized in that the signal generating means generates a signal for causing the display device to perform the display for a predetermined time. In the electronic device as described in any one of Claims 1-10,
An electronic apparatus, wherein the display device is provided in a main body.

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