JP2011253022A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that photographs a subject effectively using a light flux projected from a projector.SOLUTION: An electronic apparatus includes a photography unit 18 for photographing a subject; a projection unit 20 for projecting a light flux that projects an image; and a light flux adjustment member 24 having at least one light flux adjustment window that determines a traveling direction and an optical path region of the light flux so that the light flux radiates a range photographed by the photography unit.

Description

  The present invention relates to an electronic device.

  A camera incorporating a projector is known (for example, see Patent Document 1).

JP 2006-91091 A

  However, in the above-described camera, the shooting center in the camera and the projection center in the projector do not match, and the shooting range in the camera and the projection range in the projector do not match, so the projector projection light is used as auxiliary light for shooting. Even if it is used, there is a problem that it cannot perform a sufficient function as auxiliary light and lacks practicality.

  The objective of this invention is providing the electronic device which can image | photograph a to-be-photographed object using effectively the light beam projected from the projector.

  The electronic apparatus according to the present invention includes a photographing unit for photographing a subject, a projection unit for projecting a light beam for projecting an image, and a progress of the light flux so as to irradiate a range where the light flux is photographed by the photographing unit. And a light beam adjusting member having at least one light beam adjusting window for determining a direction and an optical path region.

  According to the electronic apparatus of the present invention, a subject can be photographed by effectively using the light beam projected from the projector.

It is a perspective view which shows the external appearance of the front surface of the digital camera which concerns on embodiment. It is a front view which shows the inside of the housing | casing of the digital camera which concerns on embodiment. It is a figure which shows the structure of the projection unit in the digital camera which concerns on embodiment. It is sectional drawing of the light beam adjustment member and projection unit in the digital camera which concerns on embodiment. It is sectional drawing of the light beam adjustment member and projection unit in the digital camera which concerns on embodiment. 1 is a block diagram showing a system configuration of a digital camera according to an embodiment. It is a flowchart which shows the process of the digital camera which concerns on embodiment. It is a figure which shows the position of the light beam adjustment member at the time of the power supply OFF of the digital camera which concerns on embodiment. It is a figure which shows the position of the light beam adjustment member at the time of AF auxiliary light projection of the digital camera which concerns on embodiment. It is a figure which shows the position of the light beam adjustment member at the time of the image projection of the digital camera which concerns on embodiment. It is a top view which shows the optical path of AF auxiliary light at the time of AF auxiliary light projection of the digital camera which concerns on embodiment. It is a side view which shows the optical path of AF auxiliary light at the time of AF auxiliary light projection of the digital camera which concerns on embodiment. It is a figure which shows the position of the light beam adjustment member at the time of the flash light projection of the digital camera which concerns on embodiment. It is a top view which shows the irradiation range of the flash light at the time of the flash light projection of the digital camera which concerns on embodiment. It is a side view which shows the irradiation range of the flash light at the time of the flash light projection of the digital camera which concerns on embodiment.

  A digital camera according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating an appearance of a front surface of a digital camera according to an embodiment. The digital camera 2 includes a housing 4 made of metal or plastic, and a front surface of the housing 4 is provided with a photographing window 6 for entering subject light and a projection window 8 for projecting a projected image. Further, on the upper surface of the camera 2, a release button 12 for instructing a release operation, a power button 14, and a PJ button 16 for switching between a photographing mode for performing camera photographing and a projection mode for projecting a projected image are provided.

  FIG. 2 is a front view showing the inside of the housing 4 of the digital camera 2 according to the embodiment. Inside the digital camera 2 are a photographing unit 18 for photographing a subject, a projection unit 20 for projecting a projection image, a battery 22 for supplying power to the photographing unit 18 and the projection unit 20, and a housing 4. A moving light flux adjusting member 24 and a drive motor 26 for moving the position of the light flux adjusting member 24 are provided.

  Here, the light flux adjusting member 24 has a rectangular shape having a long side in the width direction of the housing 4, and is disposed on the upper front side of the projection unit 20 inside the housing 4. The length of the light beam adjusting member 24 in the long side direction is approximately three times the width of the opening 44 (see FIG. 10) of the projection unit 20, and the length of the light beam adjusting member 24 in the short side direction. The length is slightly longer than the height of the opening 44. The light beam adjusting member 24 also has a shielding portion 27 that shields the opening 44 on the photographing unit 18 side, and AF auxiliary light that is emitted to obtain a predetermined luminance when performing distance measurement for photographing a subject in the center portion. Are provided with a circular AF auxiliary light beam adjusting window 28 for projecting light, and a rectangular flash light beam adjusting window 30 for projecting flash light for flashing to obtain a predetermined luminance at the time of photographing on the battery 22 side.

  The drive motor 26 has a rotating shaft (not shown), and a pinion gear 31 is fixed to the rotating shaft. The pinion gear 31 is engaged with a rack gear 32 provided below the light flux adjusting member 24. When the pinion gear 31 is rotated by driving of the drive motor 26, the light flux adjusting member 24 is moved in the width direction of the housing 4. Along the inside of the housing 4.

  FIG. 3 is a diagram showing a configuration of the projection unit 20 according to the embodiment. The projection unit 20 includes an LED 33 as a light source, a condensing lens 34 for making the light beam emitted from the LED 33 substantially parallel, and a polarization beam splitter that separates the incident light beam into a P-polarized component beam and an S-polarized component beam. 36, an LCOS 38 for displaying a projection image projected by the projection unit 20, a projection lens 40 for projecting the projection image, and a mirror 42 for deflecting the projection direction of the light beam emitted from the projection lens 40. Here, as the luminance of the luminous flux emitted from the LED 33, three types of luminance are set in advance: luminance for AF auxiliary light, luminance for flash light, and luminance for optical image projection. Is adjusted to a predetermined luminance. The brightness level is the highest for flash light and the lowest for AF auxiliary light.

  FIG. 4 is a cross-sectional view of the light beam adjusting member 24 and the projection unit 20 when the AF auxiliary light beam adjusting window 28 of the light beam adjusting member 24 is positioned on the opening 44 of the projection unit 20. In this case, the light beam emitted from the opening 44 is projected in the front direction of the housing 4 through the projection window 8 after the traveling direction and the optical path region are determined in the AF auxiliary light beam adjustment window 28. The AF auxiliary light beam adjustment window 28 has a circular opening of a predetermined size, and the traveling direction and optical path area of the light beam depend on the size of the opening of the AF auxiliary light beam adjustment window 28. It is determined uniquely.

  FIG. 5 is a cross-sectional view of the light beam adjusting member 24 and the projection unit 20 when the flash light beam adjusting window 30 of the light beam adjusting member 24 is positioned on the opening 44 of the projection unit 20. In this case, the light beam emitted from the opening 44 is projected in the front direction of the housing 4 through the projection window 8 after the traveling direction and the optical path region are determined in the flash light beam adjustment window 30. The flash light beam adjustment window 30 has a rectangular opening of a predetermined size, and the traveling direction and optical path area of the light beam are uniquely determined by the size of the opening of the flash light beam adjustment window 30. To be determined.

  FIG. 6 is a block diagram showing a system configuration of the digital camera 2 according to the embodiment. The digital camera 2 includes a CPU 50, and an operation unit 52 including a photographing unit 18, a projection unit 20, a release button 12, a power button 14, a PJ button 16, and the like is connected to the CPU 50.

  Here, the photographing unit 18 includes a photographing control circuit 70, an image sensor 72, a photographing lens 74, and a lens driving circuit 76. Note that the imaging control circuit 70 performs drive control of the image sensor 72 and the lens driving circuit 76 in accordance with an instruction from the CPU 50.

  The projection unit 20 also includes a projection lens 40, LCOS 38, LED 33, projection control circuit 82, lens drive circuit 84, and light beam adjustment member drive circuit 86 that controls the drive of the light beam adjustment member 24. Here, the projection control circuit 82 controls the LED 33, the LCOS 38, and the lens driving circuit 84 based on a projection instruction output from the CPU 50, and performs projection of a light beam and projection of an image. Further, the light flux adjusting member drive circuit 86 is operated based on the drive instruction output from the CPU 50, and the light flux adjusting member 24 is moved to a predetermined position.

  The CPU 50 also includes a memory 54 for storing image data generated by A / D conversion of an imaging signal output from the imaging device 72 of the imaging unit 18 in an A / D conversion unit (not shown), a captured image, and a projection. A memory card 56 that stores data such as images and sounds, a liquid crystal display 58 that is provided on the back of the housing 4 and displays captured images, etc., power from the battery 22 to each unit of the imaging unit 18 and the projection unit 20 A power supply circuit 60 that supplies audio, a microphone 62 that acquires audio, a speaker SR64 and speaker SL66 that output audio based on audio data, and an external interface 68 that transmits or acquires image data and the like to and from external devices are connected. ing.

  Next, processing of the digital camera 2 according to the embodiment will be described with reference to a flowchart shown in FIG. First, as shown in FIG. 8, when the power is turned off, the shielding part 27 of the light flux adjusting member 24 is positioned on the opening 44 of the projection unit 20, and the opening 44 of the projection unit 20 is shielded by the light flux adjusting member 24. Has been. When the power button 14 is turned on, the CPU 50 sets a photographing mode for photographing a subject by the photographing unit 18 (step S1), and drives the drive motor 26 by the light flux adjusting member drive circuit 86 via the projection control circuit 82. Then, the pinion gear 31 is rotated to move the light beam adjusting member 24 so that the AF auxiliary light beam adjusting window 28 is positioned on the opening 44 of the projection unit 20 as shown in FIG. 9 (step S2).

  Next, the CPU 50 determines whether or not the PJ button 16 has been pressed (step S3). When the PJ button 16 is pressed, the CPU 50 sets a projection mode in which a projection image is projected by the projection unit 20 (step S4). Next, the light flux adjusting member drive circuit 86 is controlled via the projection control circuit 82, and the light flux adjusting member 24 is moved from above the opening 44 of the projection unit 20 as shown in FIG. (Step S5). When the movement of the light beam adjusting member 24 is completed, the CPU 50 instructs the projection unit 20 to start projection, reads the image data from the memory card 56, and causes the projection control circuit 82 to display an image based on the image data on the LCOS 38. The projection control circuit 82 adjusts the luminance of the light beam emitted from the LED 33 to the luminance for projecting the optical image in response to an instruction to start projection, and lights it. The projection light is emitted from the projection window 8 and projected to a predetermined position. An image is projected (step S6).

  On the other hand, when the PJ button 16 is not pressed (step S3; No), when the release button 12 is pressed halfway by the operator (step S7), the CPU 50 starts the irradiation of the AF auxiliary light to the projection unit 20. When instructed, the projection control circuit 82 adjusts the brightness of the light beam emitted from the LED 33 to the brightness for AF auxiliary light and lights it, and emits AF auxiliary light from the opening 44 (step S8). The AF auxiliary light emitted from the opening 44 is emitted through the projection window 8 after the traveling direction and the optical path area are determined in the AF auxiliary light beam adjustment window 28 and irradiates the subject.

  Here, FIG. 11 is a plan view showing the optical path of the AF auxiliary light when the digital camera 2 is viewed from above. As shown in FIG. 11, the incident light path of the subject light entering the photographing unit 18 from the subject through the photographing window 6 and the photographing lens 74 and the light beam adjustment for AF auxiliary light emitted from the projection unit 20 and emitted from the light beam adjusting member 24. After the traveling direction and the optical path area are determined in the window 28, the optical path of the AF auxiliary light emitted from the projection window 8 intersects at the focal position of the standard focus in the imaging unit 18, and the imaging center at the focal position and the AF auxiliary Are substantially coincident with each other. FIG. 12 is a side view showing an optical path of AF auxiliary light when the digital camera 2 is viewed from the side surface on the photographing unit 18 side. Similarly, when viewed from the side, the incident light path of subject light entering the photographing unit 18 from the subject through the photographing window 6 and the photographing lens 74 and the AF auxiliary light emitted from the projection unit 20 and emitted from the light beam adjusting member 24 are also shown. After the advancing direction and the optical path region are determined in the light beam adjustment window 28 for light, the optical path of the AF auxiliary light emitted from the projection window 8 intersects at the focal position of the standard focus in the photographing unit 18 and the photographing center at the focal position. , AF-assist projection centers substantially coincide.

  Next, the CPU 50 controls the photographing unit 18 to perform the photometry of the subject and the distance from the housing 4 to the subject in a state where the AF auxiliary light is irradiated on the subject, and after the photometry and the distance measurement are completed. The LED 33 is turned off (step S9). Next, the photographing control circuit 70 operates the lens driving circuit 76 based on the distance measurement result to move the photographing lens 74 and adjust the focus. On the other hand, the CPU 50 determines whether or not the luminance of the subject has exceeded a predetermined threshold based on the photometric result (step S10). Note that the operator can arbitrarily set the predetermined threshold.

  When the brightness of the subject exceeds a predetermined threshold (step S10; Yes), when the release button 12 is fully pressed by the operator (step S11), the image sensor 72 takes a picture (step S15) and the image is taken. Image data based on the imaging signal read from the element 72 via the imaging control circuit 70 is stored in the memory 54 and stored in the memory card 56 as an image file of a predetermined file format such as Exif.

  On the other hand, when the luminance of the subject does not exceed the predetermined threshold (step S10; No), the CPU 50 controls the light flux adjusting member drive circuit 86 to drive the drive motor 26 and rotate the pinion gear 31, As shown in FIG. 13, the light beam adjusting member 24 is moved so that the flash light beam adjusting window 30 is positioned on the opening 44 of the projection unit 20 (step S12). Next, when the release button 12 is fully pressed by the operator (step S13), the CPU 50 instructs the projection unit 20 to start irradiating flash light, and the projection control circuit 82 determines the luminous flux emitted from the LED 33. The brightness is adjusted to the brightness for flash light and the light is turned on, and the flash light is emitted from the opening 44 (step S14). The flash light emitted from the opening 44 is emitted through the projection window 8 after the traveling direction and the optical path region are determined in the flash light beam adjustment window 30, and irradiates the subject.

  Here, FIG. 14 is a plan view showing the flash light irradiation range when the digital camera 2 is viewed from above. As shown in FIG. 14, a photographing range that is a range of a subject to be photographed by the photographing unit 18 via the photographing window 6 and the photographing lens 74, and a light beam adjustment window for flash light emitted from the projection unit 20 and of the light flux adjusting member 24. After the traveling direction and the optical path area are determined at 30, the irradiation range of the flash light emitted from the projection window 8 substantially matches the focal position of the standard focus in the photographing unit 18. FIG. 15 is a side view showing a flash light irradiation range when the digital camera 2 is viewed from the side surface on the photographing unit 18 side. Similarly, when viewed from the side, the photographing range that is the range of the subject to be photographed by the photographing unit 18 through the photographing window 6 and the photographing lens 74 and the flash light emitted from the projection unit 20 and emitted from the light flux adjusting member 24 are used. After the traveling direction and the optical path area are determined in the light beam adjustment window 30, the irradiation range of the flash light emitted from the projection window 8 substantially matches the focal position of the standard focus in the photographing unit 18.

  In a state where the flash light is irradiated on the subject, the image pickup device 72 takes a picture (step S15), and image data based on the image pickup signal read from the image pickup device 72 via the image pickup control circuit 70 is stored in the memory 54. And stored in the memory card 56 as an image file in a predetermined file format such as Exif. When photographing is performed, the CPU 50 turns off the LED 33 and moves the light flux adjusting member 24 to the original position (see FIG. 8).

  According to the digital camera 2 according to this embodiment, a subject can be photographed by effectively using AF auxiliary light and flash light projected from the projection unit 20. Further, it is not necessary to provide dedicated parts and circuits for the AF auxiliary light emitting device and the flash light emitting device, and the digital camera 2 can be reduced in size and cost.

  In the above-described embodiment, the flash light is projected when the luminance of the subject does not exceed the predetermined threshold. However, a flash button for instructing the flash light is provided, and the flash button is set by the operator. When pressed, the flash light beam adjusting window 30 of the light beam adjusting member 24 may be positioned on the opening 44 of the projection unit 20 to project the flash light.

  In the above-described embodiment, the luminance of the light beam is adjusted to a predetermined luminance when the LED 33 is turned on. However, the predetermined luminance may be arbitrarily set by the operator. Moreover, you may enable it for an operator to set arbitrarily the lighting time of LED33.

  In the above-described embodiment, the CPU 50 drives the drive motor 26 to move the position of the light flux adjusting member 24. However, the operator may appropriately move the position of the light flux adjusting member 24. .

  In the above-described embodiment, the digital camera 2 has been described as an example of the electronic device. However, the present invention can be applied to other electronic devices such as a mobile phone as long as the photographing unit and the projection unit are provided. Can do.

  2 ... digital camera, 4 ... housing, 6 ... shooting window, 8 ... projection window, 12 ... release button, 14 ... power button, 16 ... PJ button, 18 ... shooting unit, 20 ... projection unit, 22 ... battery, 24 DESCRIPTION OF SYMBOLS ... Luminous flux adjustment member, 26 ... Drive motor, 27 ... Shielding part, 28 ... AF auxiliary light beam adjustment window, 30 ... Flash light adjustment window

Claims (4)

A shooting unit for shooting the subject;
A projection unit for projecting a light beam for projecting an image;
An electronic apparatus comprising: a light beam adjusting member having at least one light beam adjusting window that determines a traveling direction and an optical path region of the light beam so as to irradiate a range where the light beam is photographed by the photographing unit. The luminous flux adjusting member is
AF auxiliary light beam adjustment window for determining the traveling direction and optical path area of the AF auxiliary light when the luminous flux is used as AF auxiliary light, and the traveling direction and optical path area of the flash light when the luminous flux is used as flash light The electronic apparatus according to claim 1, further comprising at least one of a light beam adjustment window for a flash light that determines the light intensity.   When the image is projected by the projection unit, the light flux adjusting member driving unit that moves the position of the light flux adjusting window for AF auxiliary light and the light flux adjusting window for flash light in the light flux adjusting member to the outside of the optical path of the light flux. The electronic apparatus according to claim 2, further comprising:   When the subject is photographed by the photographing unit, the luminous flux adjusting member driving unit that moves the position of the luminous flux adjusting window for AF auxiliary light or the luminous flux adjusting window for flash light on the luminous flux adjusting member on the optical path of the luminous flux. The electronic apparatus according to claim 2, further comprising:

Images