JP4341407B2 - Imaging projection device - Google Patents

Description

  The present invention relates to an imaging / projection apparatus particularly suitable for small portable devices such as digital cameras and camera-equipped mobile phones.

  Recently, small electronic devices that place importance on portability, such as digital cameras and camera-equipped mobile phones, not only have an imaging function, but also improve visibility on a display unit that reproduces and displays an image obtained by imaging. The size of the liquid crystal display is gradually increasing.

However, while the size of the main body of the device has been reduced year by year, there is a limit to increasing the size of the display unit, which makes it possible to enlarge the display unit screen for viewing. Various things are considered. (For example, Patent Documents 1 and 2)
JP 2001-197177 A JP 2003-143282 A

  However, each of the above-mentioned patent documents has a technique in which a magnifying optical lens is attached to the display unit of the device, and must be carried in a state of being attached to the device body or in a separate state. In addition, there was a problem that handling in a state where it is not used is troublesome.

  The present invention has been made in view of the above circumstances, and the object of the present invention is a small electronic device that is supposed to be carried and used to enlarge an image beyond the size of the display screen. It is an object of the present invention to provide an image pickup and projection apparatus that enables all displays but does not complicate handling without using a mechanism therefor, and does not impair portability.

According to the first aspect of the present invention, there is provided an optical lens system, an image sensor that is removably disposed at a focus position on an optical path of the optical lens system, a transmissive display panel that displays an image, and the transmissive display. A backlight disposed on the back side of the image display direction of the panel, position control means for switching insertion / removal of the image sensor to and from the in-focus position in the shooting mode and the projection mode, and the backlight in the projection mode And a projection mechanism for disposing at least a part of both the transmissive display panel on the optical path of the optical lens system, and at least a part of the projection mechanism disposed on the optical path of the optical lens system in the projection mode of the backlight. In the projection mode, the light emission brightness is further increased, and the backlight is provided with a separate light emitting element in a part disposed on the optical path of the optical lens system in the projection mode and another part not disposed. Emitting element part side which is disposed on the optical path of the optical lens system when mode is characterized in that a controllable at least a light-emitting luminance.

According to a second aspect of the invention, there is provided the projection lens according to the first aspect, further comprising a projection lens dedicated to a projection mode, which is detachably disposed in an optical path of the optical lens system.

The invention according to claim 3 is the invention according to claim 1, wherein at least a part of both the backlight and the transmissive display panel is not on the optical path of the optical lens system in the photographing mode by the projection mechanism. The image processing apparatus further includes a light blocking unit that blocks light incident on the image sensor from outside the apparatus.

The invention described in claim 4 is the invention described in claim 3 , wherein the light shielding means also serves as a switch for setting a projection mode.

According to a fifth aspect of the present invention, in the invention according to the third aspect , the light shielding means is arranged in conjunction with the imaging element inside the apparatus by the position control means.

The invention described in claim 6 is the invention described in claim 3 , wherein the device has a foldable main body in which two housings are connected via a hinge mechanism, and the optical lens system, the image pickup device, and the light shielding device. Means and position control means are provided on the first casing, and the light shielding means is provided on the inner surface side when the main body is folded, and the transmissive display panel and the backlight are inner surfaces when the main body is folded on the second casing. It is provided in the side which becomes.

According to the first aspect of the present invention, the optical lens system for imaging, the transmissive display panel for display, and the backlight are also used for projection, and the position of the image sensor inside the apparatus is retracted from the optical path. The display image can be projected as it is by arranging at least a part of both the backlight and the transmissive display panel on the optical path of the optical lens system, so that the mechanism for projection display is not used. Is not complicated and does not impair portability. In addition, the brightness of at least part of the backlight, which is the light source in the projection mode, is further increased, so that it is brighter in the projection mode, and therefore a larger image can be projected and displayed at a distance from the projection target. Can do. Furthermore, by adopting a light emitting element suitable as a light source in the projection mode in advance for at least a part of the backlight, the light emitting element in the projection mode is increased, and a light emitting element that consumes less power is selected. It is possible to reduce the burden on the apparatus while improving the quality of an image projected and displayed in the mode.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, a projection lens dedicated to the projection mode is provided to compensate for the optical characteristics such as the focal length in the projection mode, thereby taking an image. The design of the optical lens system for performing the above becomes easier.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to reliably prevent external light from entering the image pickup device from other than the optical lens system in the photographing mode.

According to the fourth aspect of the invention, in addition to the effect of the third aspect of the invention, the light shielding means is also used as a switch for setting the projection mode, thereby providing a mechanism for setting / releasing the projection mode. Not only can it be reduced, but the operability for setting / releasing the projection mode can be further improved.

According to the invention described in claim 5 , in addition to the effect of the invention described in claim 3 , the light shielding means is arranged in conjunction with the image pickup device inside the apparatus, for example, light shielding by a user. It is possible to eliminate the trouble of manually attaching and detaching the cover for the operation and to further improve the operability.

According to the invention described in claim 6 , in addition to the effect of the invention described in claim 3 , image formation in the projection mode and position setting on the light source side and the projection side can be easily realized by the folding operation of the apparatus.

(First embodiment)
A first embodiment when the present invention is applied to a digital camera with a projection function will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing the external configuration, in which FIG. 1 (A) is mainly a front view and FIG. 1 (B) is a mainly rear view.

  The digital camera 1 has a photographing lens 2 having an (optical) zoom function, a self-timer lamp 3, an optical viewfinder window 4, a microphone unit 5, a strobe light emitting unit 6, and a bar grip 7 on a front surface of a substantially rectangular thin plate body. The power key 8 and the shutter key 9 are disposed on the right end side (for the user) of the upper surface.

  The bar grip 7 is made of a metal that is arranged so that the middle finger, the ring finger, and the little finger of the right hand can securely hold the housing when the user grips the digital camera 1 from the right side of the housing with the right hand during shooting. It is a band-like projection.

  The power key 8 is a key operated every time the power is turned on / off, and the shutter key 9 instructs photographing in the photographing mode.

  Also, on the back of the digital camera 1, there are a W / T key 10, a shooting mode (REC) key 11, a playback mode (PLAY) key 12, a projection mode (PROJ.) Key 13, a menu (MENU) key 14, and a ring key. 15, a set (SET) key 16, a speaker unit 17, an indicator unit 18, an optical finder 19, and a display unit 20.

  The W / T key 10 is a seesaw switch, and is operated continuously on the W (Wide: wide angle) side or T (Tele: telephoto) side within the range of the focal length of the photographing lens 2. Variable setting.

  The shooting mode key 11, the playback mode key 12, and the projection mode key 13 unconditionally turn on the power regardless of whether the power is turned on or off, and shoot the basic mode according to the operated key. Select and set the mode, playback mode or projection mode.

  The menu key 14 is operated when selecting various menu items and the like.

  The ring key 15 is a circumferential key, and instructs to move the cursor in the vertical and horizontal directions corresponding to the operation position. The set key 16 is located at the center of the ring-shaped ring key 15 and instructs to select and set an item that is temporarily selected.

  The speaker unit 17 amplifies and outputs sound as necessary in the playback mode or the projection mode.

  The indicator unit 18 is composed of, for example, two LED lamps, one each for red and green, and displays the charging state of the strobe, the in-focus state associated with the AF (autofocus) function, and the like by lighting or blinking and its pattern. .

  The display unit 20 is configured integrally with a backlight mechanism composed of a transmissive color liquid crystal display panel, a cold cathode tube, and a diffusion plate. As shown in the drawing, the display unit 20 rotates as indicated by an arrow A with a hinge unit 21 as a center. This figure shows the rotation position in the playback mode.

  In this playback mode state, the color liquid crystal panel is positioned on the front side, the backlight mechanism is positioned on the back side (front of the camera) side, and an image displayed and played back by the user positioned on the back side of the digital camera 1 is displayed. Visible.

  In the projection mode, the display unit 20 is rotated about 180 ° about the hinge 21 along the arrow A, and is fitted into the opposite body recess 1a. The body recess 1a is for placing the display unit 20 on the optical path of the photographic lens 2 while the surface on which the display unit 20 contacts is sealed with a transparent resin and keeping the airtight inside the digital camera 1. is there.

  In the photographing mode and the reproduction mode, a resin-made light shielding cap 22 is fitted into and covered with the body recess 1a as shown by an arrow B, so that the inside of the digital camera 1 body, particularly solid-state imaging described later. The incident of external light to the CCD, which is an element, is avoided.

  Although not shown, the digital camera 1 has a memory card slot for attaching / detaching a memory card used as a recording medium, a serial interface connector for connecting to an external personal computer, etc., for example, USB (Universal). (Serial Bus) connector and the like are provided.

  FIG. 2 shows the concept of the arrangement of parts inside and outside the digital camera 1 that is switched between the projection mode, the imaging mode, and the playback mode. In the figure, the CCD 23 at the in-focus position on the optical path of the photographing lens 2 in the photographing mode and the reproduction mode is retracted from the optical path as shown by an arrow C in the projection mode.

  In addition, in the projection mode, a projection lens 24 is disposed on the optical path as indicated by an arrow D instead of the CCD 23. The projection lens 24 compensates optical characteristics such as the focal length of the photographing lens 2 in the projection mode, and focuses the projected image at a position close to the front of the photographing lens 2.

  In FIG. 2, the CCD 23 and the projection lens 24 are moved separately. For example, the CCD 23 and the projection lens 24 are arranged on the same circumference of a single circuit board, and the focal length, aperture, etc. of the photographing lens 2 are set. The CCD 23 and the projection lens 24 are alternatively arranged on the optical path of the photographing lens 2 without physically interfering with each other by rotating the circuit board by switching driving of a motor that variably drives the lens. You may do it.

Further, as shown in FIG. 1, the display unit 20 is manually disposed on the optical path of the photographing lens 2 as indicated by an arrow A. In this projection mode, the display unit 20 has a backlight mechanism 20a on the back side of the camera and a color liquid crystal panel 20b on the front side thereof, and displays on the color liquid crystal panel 20b as shown by the arrow C in FIG. The formed light image is projected and displayed on an object (not shown) such as a screen positioned in front of the digital camera 1 through the projection lens 24 and the photographing lens 2 by illumination of the backlight mechanism 20a.
The rotation position of the display unit 20 that is manually operated is detected by a position detection switch 25 described later provided on the hinge unit 21.

Next, the electronic circuit configuration of the digital camera 1 will be described with reference to FIG.
In the figure, in the photographing mode which is the basic mode, the photographing lens 2 is configured such that the lens position is moved according to the focal length by driving the motor 31 at a predetermined video rate, for example, every 1/30 [second]. The CCD 23, which is an image sensor disposed behind the photographing optical axis of the lens optical system 32, is scanned and driven by a timing generator (TG) 33 and a vertical driver 34, and photoelectrics corresponding to optical images formed at regular intervals. Output the converted output for one screen.

  This photoelectric conversion output is appropriately gain-adjusted for each primary color component of RGB in the state of an analog value signal, then sampled and held by a sample hold circuit (S / H) 35, and digital data by an A / D converter 36 The color process circuit 37 further performs color process processing including pixel interpolation processing and γ correction processing to generate a luminance signal Y and color difference signals Cb, Cr, and a DMA (Direct Memory Access) controller. 38.

  The DMA controller 38 once uses the luminance signal Y and the color difference signals Cb and Cr output from the color process circuit 37 by using the composite synchronization signal, the memory write enable signal, and the clock signal from the color process circuit 37 once. And the DMA transfer to the DRAM 40 used as a buffer memory via the DRAM interface (I / F) 39.

  The control unit 41 includes a CPU, a ROM that fixedly stores an operation program executed by the CPU including processing in a projection mode, which will be described later, and a RAM that is used as a work memory. 1 Controls overall control operations.

  Thus, after the DMA transfer of the luminance and color difference signals to the DRAM 40 is completed, the control unit 41 reads the luminance and color difference signals from the DRAM 40 via the DRAM interface 39 and writes them into the VRAM 43 via the VRAM controller 42.

  The digital video encoder 44 periodically reads the luminance and color difference signals from the VRAM 43 through the VRAM controller 42, generates a video signal based on these data, and outputs the video signal to the color liquid crystal panel 20b of the display unit 20.

  As described above, the display unit 20 is configured such that the backlight mechanism 20a and the color liquid crystal panel 20b are integrally rotated on the back side of the digital camera 1, and the display unit 20 is in the shooting mode as shown in FIG. In the rotating state, it functions as a monitor display unit (electronic finder) and performs display based on the video signal from the digital video encoder 44 so that an image based on the image information fetched from the VRAM controller 42 at that time is displayed in real time. Will be displayed.

  In this way, when the shutter key 9 is operated at a timing at which still image shooting is desired in a so-called through image monitor display state in which the current image is displayed on the display unit 20 in real time as a monitor image, a trigger signal is generated. Is generated.

  In response to the trigger signal, the control unit 41 stops driving the CCD 23 according to the video rate at that time, and then performs an automatic focusing process and an automatic exposure process to obtain an appropriate focusing value and exposure value. Then, based on the obtained contents, the focusing position of the lens optical system 32, the stop, and the exposure time of the CCD 23 are controlled to perform another imaging.

  After the newly obtained image data for one frame is DMA-transferred and written in the DRAM 40 in this way, the control unit 41 transmits the luminance and color difference signals for one frame written in the DRAM 40 via the DRAM interface 39. The Y, Cb, and Cr components are read in a unit called a basic block of vertical 8 pixels × horizontal 8 pixels and written to a JPEG (Joint Photographic Coding Experts Group) circuit 45. The JPEG circuit 45 uses ADCT (Adaptive). Data compression is performed by processing such as Discrete Cosine Transform (adaptive discrete cosine transform) and Huffman coding which is an entropy coding method.

  Then, the obtained code data is read out from the JPEG circuit 45 as a data file of one image, and when the memory card 46 is detachably attached as a recording medium of the digital camera 1 or when the memory card 46 is not attached. The data is written in the built-in memory 47 fixedly built in the digital camera 1.

  Then, with the compression processing of the luminance and color difference signals for one frame and the completion of writing all the compressed data to the memory card 46 or the built-in memory 47, the control unit 41 passes from the CCD 23 based on the video rate via the DRAM 40. The driving for displaying the through image on the display unit 20 on the monitor is resumed.

  The control unit 41 is connected to a key input unit 48, an audio processing unit 49, a strobe driving unit 50, and a position detection switch 25.

  The key input unit 48 includes the power key 8, shutter key 9, W / T key 10, shooting mode key 11, shooting mode key 11, playback mode key 12, projection mode key 13, menu key 14, ring key 15, and the like described above. And a set key 16 and the like, and signals accompanying these key operations are sent directly to the control unit 41.

  The audio processing unit 49 includes a sound source circuit such as a PCM sound source, digitizes the audio signal input from the microphone unit (MIC) 5 when recording audio, and performs a predetermined data file format such as MP3 (MPEG-1 audio layer). 3) Data compression is performed in accordance with the standard to create an audio data file and send it to the memory card 46 or the built-in memory 47. On the other hand, when playing back audio, the audio data file sent from the memory card 46 or the key input unit 48 Uncompressed and converted to analog, and the speaker unit (SP) 17 is driven to emit loud sound.

  Further, the sound processing unit 49 generates various operation sounds based on the control from the control unit 41, for example, a pseudo shutter sound associated with the operation of the shutter key 9, a beep sound associated with the operation of other keys, and the like. A loud sound is emitted from the unit 17.

  The strobe driving unit 50 charges a large-capacity strobe capacitor (not shown) at the time of still image shooting, and then flashes the strobe light emitting unit 6 based on the control from the control unit 41.

  As described above, the position detection switch 25 is disposed on the hinge unit 21, detects the rotational position of the display unit 20, and sends a detection signal to the control unit 41.

  However, when shooting a moving image instead of a still image, the above-described still image data is compressed by the JPEG circuit 45 and the still image data file is stored in the memory card 46 or the built-in memory 47 while the shutter key 9 is being operated. When the operation of the shutter key 9 ends or when a predetermined time limit, for example, 30 seconds elapses, the series of still image data files are collectively recorded as motion JPEG. Re-set as a data file (AVI file).

  At this time, when shooting of a moving image with sound is designated, the sound data file obtained by the input from the microphone unit 5 is also recorded in association with the sound as described above.

  In the playback mode, which is the basic mode, the control unit 41 selectively reads out the image data recorded in the memory card 46 or the built-in memory 47, and the procedure is completely opposite to the procedure in which the JPEG circuit 45 compresses the data in the shooting mode. The decompressed image data is decompressed, and the decompressed image data is retained in the DRAM 40 via the DRAM interface 39, and the retained contents of the DRAM 40 are stored in the VRAM 43 via the VRAM controller 42. The image data is periodically read out to generate a video signal, which is reproduced and output by the color liquid crystal panel 20b of the display unit 20.

  If the selected image data is not a still image but a moving image, playback of the individual still image data constituting the selected moving image file is executed continuously in time, and playback of all the still image data is finished. At that time, the image is reproduced and displayed using only the still image data located at the head until the next reproduction instruction is given.

Next, the operation of the above embodiment will be described.
Each process shown below is basically executed based on a program fixedly stored in advance by the control unit 41.

FIG. 4 illustrates the operation in the projection mode, which is the basic mode.
In this operation, the projection mode is determined by repeatedly determining whether or not the projection mode key 13 has been operated when the power is turned off or when the photographing mode or the playback mode is designated after the power is turned on. It waits for an instruction (step A01).

  When the projection mode key 13 is operated, the CCD 23 is first retracted from the optical path of the photographing lens 2 as shown by the arrow C in FIG. 2 prior to projection (step A02), and instead the arrow D in FIG. As shown in FIG. 8, the projection lens 24 is inserted and arranged on the optical path (step A03).

  Thereafter, it is determined whether or not the display unit 20 is at the projection position based on the detection signal of the position detection switch 25 (step A04). If not, the time is counted by a timer inside the control unit 41 (step A05). Then, it is determined whether or not a predetermined time, for example, 5 [seconds] has been reached (step A06), and if not, the process of returning to step A04 is repeatedly executed, and the display unit 20 is manually operated by the user. Wait for the projection position.

When a predetermined time elapses without the display unit 20 being at the projection position, and this is determined in step A06, the color liquid crystal panel 20b of the display unit 20 is displayed,
"Turn the display panel to the projection position"
Is displayed (step A07), the process returns to step A04 and waits for the display unit 20 to be rotated.

  Thus, when the light shielding cap 22 is removed from the body recess 1a of the digital camera 1 and the display unit 20 is rotated to the projection position, this is determined in step A04 and before the projection mode key 13 is operated. If the playback mode is designated, the image that was last played back is displayed, and if not, the image with the latest time stamp information among the images recorded in the memory card 46 or the built-in memory 47 is displayed. This is selected and reproduced and displayed on the color liquid crystal panel 20b of the display unit 20 (step A08), and the light emission luminance of the backlight mechanism 20a of the display unit 20 is maximized (step A09).

  At this time, the light image formed by the display on the color liquid crystal panel 20b is projected to the front of the digital camera 1 through the projection lens 24 and the photographing lens 2 by illumination with the maximum luminance of the backlight mechanism 20a. By disposing the digital camera 1 at an appropriate distance from an object (not shown) such as a screen, the image can be projected and displayed in an enlarged state.

  In this projection display state, whether or not the W / T key 10 has been operated (step A10), whether or not the key indicating the left or right direction of the ring key 15 has been operated (step A11), the shooting mode key 11 or These key operations are accepted by repeatedly determining whether or not the reproduction mode key 12 has been operated to instruct the release of the projection mode (step A12).

  If it is determined in step A10 that the W / T key 10 has been operated, the focal position of the photographic lens 2 is changed in accordance with the operation to move the in-focus position of the projected image (step A13). The projection display state from step A09 is returned again.

  If it is determined in step A11 that a key indicating either the left or right direction of the ring key 15 has been operated, the left key can be used instead of the image displayed so far, corresponding to the operation direction. For example, if the time stamp information is one old image, if it is the right key, an image having one new time stamp information is selected from the memory card 46 or the built-in memory 47 and reproduced and displayed on the color liquid crystal panel 20b (step A14). It returns to the projection display state from step A09.

  In this case, when the left key is further operated from the state where the image with the oldest time stamp information recorded in the memory card 46 or the built-in memory 47 is displayed, the image with the newest time stamp information is selected. On the contrary, when the right key is further operated from the state where the image with the newest time stamp information is displayed, the image with the oldest time stamp information is selected and reproduced and displayed. The image data recorded in the memory 47 can be handled cyclically.

  If it is determined in step A12 that the shooting mode key 11 or the playback mode key 12 has been operated to instruct the release of the projection mode, the light emission luminance of the backlight mechanism 20a of the display unit 20 is changed to the normal light emission luminance. After returning to avoid wasteful power consumption (step A15), the projection lens 24 is retracted from the optical path of the photographing lens 2 (step A16) as opposed to the processing in steps A02 and A03, and the CCD 23 is replaced. Is inserted and arranged on the optical path (step A17), and the projection mode is canceled as described above, and the process returns to the process from step A01 again, and the projection mode key is executed while executing the process in the photographing mode or the reproduction mode. Wait for 13 to be operated.

  In this way, the lens optical system 32 including the photographing lens 2 for imaging, the color liquid crystal panel 20b for display, and the backlight mechanism 20a are also used for projection, and the position of the CCD 23 inside the apparatus is retracted from the optical path. By arranging both the backlight mechanism 20a and the color liquid crystal panel 20b on the optical path of the lens optical system 32 so that the display image can be projected as it is, a separate structure only for projection is mounted outside the digital camera 1. The handling of the digital camera 1 is not complicated and the portability is not impaired.

  In addition, in the above embodiment, since the light emission luminance of the backlight mechanism 20a serving as the light source in the projection mode is further increased, it is brighter in the projection mode, and therefore, a larger image can be obtained by taking a distance from the projection target. Projection display is possible.

  Further, in the above embodiment, since the projection lens 24 dedicated to the projection mode is provided, the design of the photographing lens 2 for photographing can be further improved by compensating optical characteristics such as the focal length in the projection mode. It becomes easy.

  It should be noted that the light shielding cap 22 is attached to the body recess 1a of the digital camera 1 except during the projection mode, so that external light can be reliably prevented from entering the CCD 23 from other than the photographing lens 2 particularly during the photographing mode.

  However, even without using a light shielding cap 22 as a separate component from the digital camera 1, the light shielding is performed so as to shield the contact surface of the body recess 1 a with the display unit 20 in conjunction with the CCD 23 inside the digital camera 1. If the members are moved and arranged, it is possible to save the trouble of manually attaching and detaching the light shielding cap 22 by the user and to further improve the operability.

  In the above embodiment, the display unit 20 is described as rotating about the hinge unit 21. However, for example, the display unit 20 is removed from the bottom direction of the digital camera 1 by sliding the display unit 20 with respect to the digital camera 1. In the projection mode, the structure relating to the light shielding can be simplified if the structure is such that the projection of the image can be realized by replacing the front and back of the display unit 20 once removed and remounting. it can.

(Second Embodiment)
A second embodiment when the present invention is applied to a CDMA (Code Division Multiple Access) type mobile phone with a projection function will be described below with reference to the drawings.

  FIGS. 5A and 5B show the external configuration of the mobile phone 51 according to the second embodiment. Two casings 53 and 54 are in a certain angular range with a hinge 52 interposed therebetween. The inner surface of FIG. 5 (A) is fully opened, and the inner surface of FIG. 5 (B) is mainly folded. Shows the exterior.

As shown in FIG. 5A, the inner surface of the upper housing 53 is provided with a speaker 55 serving as a receiver and a main display unit 56.
On the other hand, various keys 57 including dial keys, a microphone 58 serving as a transmitter, and a slide cover 59 are provided on the inner surface of the lower housing 54.

  Further, as shown in FIG. 5B, a camera unit 60 and a photographing light 61 are provided on the outer surface of the lower housing 54. Further, an antenna 62 that extends into the lower housing 54 is formed to protrude outward from the rear side of the end of the hinge portion 52.

  The various keys 57 include keys such as a dial key, a power key, line connection, and line disconnection, and further include a “+” key 57 a and a “−” key 57 b on the side surface of the lower housing 54.

  The slide cover 59 is slid rightward as it is engraved on the surface in the projection mode. Although not shown here, when the slide cover 59 is slid rightward, the position of the original slide cover 59 is not shown. A transparent resin window is disposed on the lower housing 54, and the lens of the camera unit 60 can be viewed from the back side while keeping the inside of the lower housing 54 airtight.

  It is assumed that a sub display unit 79 is provided on the outer surface of the upper housing 53, although not shown.

  FIG. 6 shows the concept of the structure in the mobile phone 51 related to the projection mode. In the figure, in the camera section 60 of the lower housing 54, the CCD 64, which is an image pickup element, disposed on the optical path of the optical lens 63 is retracted from the optical path as shown by an arrow E in the drawing in the projection mode. It is supposed to be.

  In the upper casing 53, a transmissive color liquid crystal panel 56a constituting the main display unit 56 is disposed on the inner surface side thereof, and the upper side of the upper casing 53 is cooled with respect to most of the rear surface side of the color liquid crystal panel 56a. While a backlight mechanism 56b using a cathode tube is provided, a plurality of high-intensity white LEDs 56c are provided only in a portion corresponding to the broken line range F in FIG.

  These high-intensity white LEDs 56c can change the overall emission luminance by controlling the number of light emission, and the broken line range F in which the high-intensity white LEDs 56c are provided on the back side folds the cellular phone 51. In this state, the window is made of a transparent resin below the slide cover 59 and the optical path position of the optical lens 63.

  FIG. 7 shows a circuit configuration of the mobile phone 51. In the figure, the antenna 62 performs CDMA communication with some of the nearest base stations, and an RF unit 71 is connected to the antenna 62.

  The RF unit 71 separates the signal input from the antenna 62 at the time of reception from the frequency axis by a duplexer, mixes it with a local oscillation signal of a predetermined frequency output from the PLL synthesizer, and converts the frequency to an IF signal. Only the reception frequency channel is extracted by the broadband BPF, and the signal level of the desired reception wave is made constant by the AGC amplifier, and then output to the modulation / demodulation unit 72 in the next stage.

  On the other hand, the RF unit 71 performs transmission power control on the OQPSK (Offset Quadri-Phase Shift Keying) modulation signal sent from the modulation / demodulation unit 72 by the AGC amplifier based on the control from the control unit 75 described later during transmission. The signal is mixed with a local oscillation signal of a predetermined frequency output from the PLL synthesizer, frequency-converted to an RF band, amplified to a large power by a PA (Power Amplifier), and radiated and transmitted from the antenna 62 via the duplexer.

  The modulation / demodulation unit 72 separates the IF signal from the RF unit 71 into a baseband IQ signal (In-phase / Quadrature-phase) signal by a quadrature detector at the time of reception, and digitizes the signal to output to the CDMA unit 73.

  On the other hand, the modulation / demodulation unit 72 converts the digital I / Q signal sent from the CDMA unit 73 into an analog signal and transmits it to the RF unit 71 after performing OQPSK modulation with a quadrature modulator.

  The CDMA unit 73 inputs the digital signal from the modulation / demodulation unit 72 at the time of reception to a PN (Pseudo Noise) code timing extraction circuit and a plurality of demodulation circuits that perform despreading / demodulation in accordance with instructions from the timing circuit. A plurality of demodulated symbols output from the above are synchronized, synthesized by a synthesizer, and output to the audio processing unit 74.

  On the other hand, at the time of transmission, the CDMA unit 73 spreads the output symbol from the voice processing unit 74, limits the band with a digital filter, generates an I / Q signal, and sends it to the modem unit 72.

  The voice processing unit 74 deinterleaves the output symbols from the CDMA unit 73 at the time of reception, and after performing error correction processing by a Viterbi demodulator, the digital signal is compressed from a digital signal compressed by a voice processing DSP (Digital Signal Processor). This is expanded into a digital audio signal, converted into an analog signal, and the speaker (SP) 55 is driven to speak out.

  On the other hand, at the time of transmission, the audio processing unit 74 digitizes the analog audio signal input from the microphone (MIC) 58, compresses the data amount by the audio processing DSP, and then performs error correction encoding by the convolutional encoder. Are interleaved and the output symbols are sent to the CDMA unit 73.

  Then, a control unit 75 is connected to the RF unit 71, the modem unit 72, the CDMA unit 73, and the sound processing unit 74, and a GPS receiver 76, an image capturing unit 77, an image processing unit 78, The main display unit 56, sub display unit 79, memory card 80, vibrator unit 81, LED drive units 82 and 83, motor (M) 84, and cover switch (SW) 85 are connected.

  Here, the control unit 75 includes a CPU, a ROM that stores various operation programs including operations in a projection mode, which will be described later, and a RAM that is used as a work memory. Control the behavior.

  The GPS receiver 76 calculates the latitude, longitude and altitude of the current position and the accurate current time based on the positioning information from the plurality of GPS satellites received by the GPS antenna 86, and outputs it to the control unit 75.

  Under the control of the control unit 75, the image photographing unit 77 performs photographing operation with the CCD 64 that is disposed behind the photographing optical axis of the optical lens 63 that is driven by the motor (M) 84 and that constitutes the camera unit 60. The image data obtained by photographing is digitized and output.

  The image processing unit 78 compresses the image data obtained from the image capturing unit 77 based on, for example, the JPEG method, while decompressing the received image data by decompressing the original image data. obtain.

  The memory card 80 is detachably attached to the cellular phone 51, and stores image data photographed by itself, image data obtained by reception, and the like.

  The vibrator unit 81 vibrates with a vibration pattern and vibration intensity that are set in advance when an incoming call is received.

  The LED driving unit 82 is a driving circuit for a high-intensity white LED that constitutes the photographing light 61, and emits auxiliary light toward the subject to be photographed by the camera unit 60 by the photographing light 61 as necessary.

  The LED drive unit 83 drives the high-intensity white LED 56c to turn on and drive the high-intensity white LED 56c so as to have a low light emission luminance in accordance with the surrounding backlight mechanism 56b when the normal main display unit 56 is displayed. All the high-intensity white LEDs 56c are turned on to emit light at the maximum luminance.

  The cover switch 85 detects the operation position of the slide cover 59 and sends a detection signal to the control unit 75.

  Although not shown, the hinge 52 has a mechanism for detecting the expanded state and the folded state of the upper housing 53 and the lower housing 54. Based on the information from the detection mechanism, the control unit 75 determines whether or not the upper housing 53 and the lower housing 54 are folded after the operation of the slide cover 59 is performed in the projection mode, and the projector can be actually projected. Can be determined.

  Note that this mobile phone 51 can record and reproduce not only still images but also moving images, as with the digital camera 1 of the first embodiment.

  In this case, both still image data and moving image data obtained by shooting are stored in the memory card 80, and the contents stored in the memory card 80 are arbitrarily reproduced and output on the color liquid crystal panel 56a of the main display unit 56 according to a selection instruction. It is possible to transmit to a communication partner by selecting and setting as an attached file of an electronic mail as appropriate.

Next, the operation of the above embodiment will be described.
Each process shown below is basically executed by the control unit 75 based on a program fixedly stored in advance.
FIG. 8 illustrates the operation in the projection mode, which is the basic mode.
In this operation, for example, from the standby state, the projection mode is instructed by repeatedly determining whether or not the slide cover 59 has been slid rightward from the position shown in FIG. Wait (step B01).

  When the slide cover 59 is slid, first, the CCD 64 is retracted from the optical path of the optical lens 63 of the camera unit 60 as shown by the arrow E in FIG. 6 before projection (step B02).

  Thereafter, it is determined whether or not the cellular phone 51 is in a folded state based on information from a mechanism for detecting the unfolded state and the folded state of the upper housing 53 and the lower housing 54 of the hinge portion 52 described above (step B03). If it is not in the folded state, the time is counted by a timer inside the control unit 75 (step B04), and it is determined whether or not a predetermined time, for example, 5 [seconds] has been reached (step B05). For example, the process of returning to step B03 is repeatedly executed to wait for the mobile phone 51 to be folded.

When a certain time elapses without the cellular phone 51 being in the folded state, and this is determined in step B05, the color liquid crystal panel 56a of the main display unit 56 is displayed,
"Please fold the body"
Is displayed (step B06), the process returns to step B03 again to wait for the mobile phone 51 to be folded.

  Thus, when the cellular phone 51 is folded, this is determined in step B03. In other operations other than the projection mode, the display on the main display unit 56 is generally turned off according to folding of the cellular phone 51, and instead The display on the sub display unit 79 (not shown) is turned on. In this projection mode, the display on the sub display unit 79 is intentionally turned off (step B07).

  In addition, if any image is reproduced on the main display unit 56 in a standby state before operating the slide cover 59, the image is recorded on the main display unit 56. Otherwise, the image recorded on the memory card 80 is displayed. The image having the latest time stamp information is selected and reproduced, and the pixels are thinned out so that the image size matches the broken line range F of the main display unit 56 shown in FIG. A portion corresponding to the broken line range F of the color liquid crystal panel 56a is displayed (step B08), and all the elements constituting the high-brightness white LED 56c are driven to light up to increase the light emission luminance to the maximum (step B09).

  At this time, the light image formed by the display in the broken line range F of the color liquid crystal panel 56a is illuminated with the maximum luminance of the high-brightness white LED 56c, and the lower casing 54 of the mobile phone 51 through the optical lens 63 of the camera unit 60. Since the mobile phone 51 is projected from the side, the mobile phone 51 can be projected and displayed in an enlarged state by disposing the mobile phone 51 at an appropriate distance from an object (not shown) such as a screen.

  In this projection display state, whether or not any of the “+” key 57a or the “−” key 57b is operated (step B10), whether a call or e-mail is received from the outside (step B11), or These key operations are accepted by repeatedly determining whether or not the cancellation of the projection mode has been instructed by unfolding the mobile phone 51 and returning the slide operation position of the slide cover 59 (step B12).

  If it is determined in step B10 that either the “+” key 57a or the “−” key 57b has been operated, instead of the previously displayed image corresponding to the operated key, for example, If the “−” key 57b is selected, an image with one old time stamp information is selected from the memory card 80 if the “+” key 57a is selected, and the color liquid crystal panel 56a of the main display unit 56 is selected. Is reproduced and displayed in the broken line range F (step B13), and the projection display state from step B09 is resumed.

  In this case, when the “−” key 57b is further operated from the state in which the image with the oldest time stamp information recorded in the memory card 80 is displayed, the image with the newest time stamp information is selected, On the contrary, when the “+” key 57a is further operated from the state in which the image having the latest time stamp information is displayed, the image having the oldest time stamp information is selected and reproduced and displayed. It is possible to handle the image data recorded in the cycle.

  If it is determined that there is an incoming call in step B11, the projection mode canceling operation shown in steps B15 to B17 shown below is executed collectively (step B14), and the incoming call is immediately received. Transition to the corresponding normal incoming call operation.

  Further, when it is determined that the release of the projection mode is instructed by the mobile phone 51 being unfolded in step B12 and the slide operation position of the slide cover 59 being returned, the number of light emitting elements of the high-intensity white LED 56c is emitted. Is reduced to normal light emission brightness to avoid wasteful power consumption (step B15), and then the CCD 64 is placed on the optical path of the optical lens 63 of the camera unit 60, contrary to the processing in step B02. (Step B16), and after turning on the display of either the main display unit 56 or the sub display unit 79 provided on the upper housing 53 according to the expanded or folded state of the mobile phone 51 (step B16). B17) Assuming that the projection mode has been canceled as described above, the process returns to step B01 again and waits. While executing the process in the state, slide cover 59 to wait for the projection mode is slid is indicated.

  As described above, the high-intensity white LED 56c used as a light source in the projection mode is integrated with the backlight mechanism 56b of the main display unit 56, and the number of light emitting elements is reduced except in the projection mode to emit light equivalent to the surroundings. By improving the brightness of the image displayed in the projection mode while increasing the light emission brightness in the projection mode and selecting a light emitting element such as an LED that consumes less power, the brightness is improved. The burden on the device can be reduced.

  In addition, the slide cover 59 serves both as a light-blocking unit that causes external light to enter the CCD 64 from other than the optical lens 63 system when shooting with the camera unit 60, and as a projection mode instruction switch. By providing such a slide cover 59, not only can the number of mechanisms for setting / releasing the projection mode be reduced, but the operability for setting / releasing the projection mode can be further improved.

  In addition, in the present embodiment, the folding mobile phone 51 projects in a state where the upper casing 53 having the main display section 56 disposed on the inner surface and the lower casing 54 having the camera section 60 are folded. The optical members of the system are linearly arranged so that a projection operation can be performed. Like the hinge portion 21 for reversing the display direction of the display portion 20 in the digital camera 1 of the first embodiment. Since it is not necessary to provide a separate mechanism, image formation in the projection mode and position settings on the light source side and the projection side can be easily realized by folding the apparatus.

  In addition, although the said 1st Embodiment demonstrated the case where this invention was applied to the digital camera and 2nd Embodiment was applied to the foldable mobile phone, this invention is not restricted to this, Relatively easy for portable electronic devices having a photographing unit and a display unit, such as PDAs (Personal Digital Assistants) equipped with camera functions, wristwatches, portable navigation devices, etc. Is feasible.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a perspective view showing an external configuration of a digital camera with a projection function according to a first embodiment of the present invention. The figure explaining the projection mechanism which concerns on the same embodiment. FIG. 2 is a block diagram showing a basic circuit configuration according to the embodiment. The flowchart which mainly shows the processing content at the time of the projection mode which concerns on the embodiment. The figure which shows the external appearance structure of the mobile telephone with a projection function which concerns on the 2nd Embodiment of this invention. The figure explaining the projection mechanism which concerns on the same embodiment. FIG. 2 is a block diagram showing a basic circuit configuration according to the embodiment. The flowchart which mainly shows the processing content at the time of the projection mode which concerns on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Digital camera, 1a ... Body recessed part, 2 ... Shooting lens, 3 ... Self-timer lamp, 4 ... Optical finder window, 5 ... Microphone part (MIC), 6 ... Strobe light emission part, 7 ... Bar grip, 8 ... Power key , 9 ... Shutter key, 10 ... W / T key, 11 ... Shooting mode (REC) key, 12 ... Playback mode (PLAY) key, 13 ... Projection mode key (PROJ.), 14 ... Menu (MENU) key, 15 ... Ring key, 16 ... Set (SET) key, 17 ... Speaker part (SP), 18 ... Indicator part, 19 ... Optical finder, 20 ... Display part, 20a ... Backlight mechanism, 20b ... Color liquid crystal panel, 21 ... Hinge , 22 ... light-shielding cap, 23 ... CCD, 24 ... projection lens, 25 ... position detection switch (SW), 31 ... motor (M), 32 ... lens Academic system, 33 ... Timing generator (TG), 34 ... Vertical driver, 35 ... Sample hold circuit (S / H), 36 ... A / D converter, 37 ... Color process circuit, 38 ... DMA controller, 39 ... DRAM Interface (I / F), 40 ... DRAM, 41 ... control unit, 42 ... VRAM controller, 43 ... VRAM, 44 ... digital video encoder, 45 ... JPEG circuit, 46 ... memory card, 47 ... built-in memory, 48 ... key input 49: Audio processing unit, 50 ... Strobe drive unit, 51 ... Mobile phone, 52 ... Hinge unit, 53 ... Upper housing, 54 ... Lower housing, 55 ... Speaker, 56 ... Main display unit, 57 ... Various keys 57a ... "+" key, 57b ... "-" key, 58 ... microphone, 59 ... slide cover, 60 ... camera unit, 61 ... shooting light, 2 ... Antenna, 63 ... Optical lens, 64 ... CCD, 71 ... RF unit, 72 ... Modulation / demodulation unit, 73 ... CDMA unit, 74 ... Audio processing unit, 75 ... Control unit, 76 ... GPS receiver, 77 ... Image capturing unit, 78 ... Image processing unit, 79 ... Sub display unit, 80 ... Memory card, 81 ... Vibrator unit, 82 ... LED drive unit, 83 ... LED drive unit, 84 ... Motor (M), 85 ... Cover switch, 86 ... GPS antenna .

Claims (6)

An optical lens system;
An image sensor that is detachably disposed at a focus position on the optical path of the optical lens system;
A transmissive display panel for displaying images;
A backlight arranged on the back side in the image display direction of the transmissive display panel;
Position control means for switching insertion / removal of the image sensor to and from the in-focus position between the photographing mode and the projection mode;
A projection mechanism for disposing at least a part of both the backlight and the transmissive display panel in the projection mode on the optical path of the optical lens system, and disposing on the optical path of the optical lens system in the projection mode of the backlight. At least part of which is more luminous in projection mode,
The backlight is provided with a light emitting element separately for a part disposed on the optical path of the optical lens system in the projection mode and another part not disposed, and is disposed on the optical path of the optical lens system in the projection mode. An imaging projection apparatus characterized in that at least light emission luminance can be controlled by a light-emitting element on the part side .   The imaging projection apparatus according to claim 1, further comprising a projection lens for projection mode, which is detachably disposed in an optical path of the optical lens system.   A light shielding means for blocking light incident on the image sensor from outside the apparatus in a state where at least a part of both the backlight and the transmissive display panel is not on the optical path of the optical lens system in the photographing mode by the projection mechanism; The imaging projection apparatus according to claim 1, further comprising: 4. The imaging projection apparatus according to claim 3 , wherein the light shielding means also serves as a switch for setting a projection mode. The imaging projection apparatus according to claim 3 , wherein the light shielding unit is arranged in conjunction with the imaging element inside the apparatus by the position control unit. The device has a foldable body that connects two housings via a hinge mechanism,
The optical lens system, the image sensor, the light shielding means and the position control means are provided in the first housing, and the light shielding means is provided on the side that becomes the inner surface when the main body is folded,
The imaging projection apparatus according to claim 3, wherein the transmissive display panel and the backlight are provided on an inner surface side when the main body of the second casing is folded.

Images