JPS60160278A - Portable television with electronic camera - Google Patents

Abstract

PURPOSE:To improve the utility value by adding a simple circuit so as to combine organically components of an electronic camera and a portable television set. CONSTITUTION:A video signal switching circuit 29 is provided as a means to switch a video signal Va and an image pickup signal Vp in response to a mode changeover switch 9. For example, the switch 9 is selected to the TV mode, the circuit 29 outputs the video signal Va and a displayswitching control circuit 75 applies a video display signal Vd and a timing control signal Vc to a diaplay drive section 80. In this case, the signal Va and a synchronizing signal of a synchronizing separator circuit 31 are applied also to a still picture signal forming section 35. In operating a shutter switch 11 in this state, a timing control signal for extracting a frame is outputted by a control signal generating circuit 37 extracts a signal for one frame's share from the signal Va, outputs as a still picture signal Vf and is recorded in a magnetic disc 4 at a pictture recording section 50. Moreover, the display device plays a role of a finder at picture pickup.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to an electronic camera equipped with functions for photographing and recording still images as so-called electronic photographs in addition to television broadcast reception and video display functions. It concerns mobile television.

[Technical background]

In recent years, the rapid development of electronic technology has led to the miniaturization of electronic devices, and for example, portable size televisions have come to be realized.

On the other hand, instead of cameras using conventional film, CCD (Charge Coupled Device)
ce) Alternatively, images captured using a solid-state image sensor such as an MO3 type image sensor can be stored in sheet-type storage media such as magnetic disks, optical disks, and magneto-optical disks, or solid-state storage media such as non-volatile semiconductor memory and magnetic bubble memory. So-called electronic cameras configured to record on storage media have also been proposed.

[Purpose of the invention]

An object of the present invention is to organically combine the components of the above-mentioned electronic camera and portable television to realize a novel portable electronic device whose usability is dramatically increased.

[Embodiments of the invention]

Figures 1 to 3 show a portable television with an electronic camera according to an embodiment of the present invention, with Figure 1 being a perspective view showing its appearance, and Figure 2 showing some of its components. It is a sectional view showing roughly.

The portable television of this embodiment has an X-Y matrix type liquid crystal display device 1 with low power consumption as an electro-optical display device. In addition, for the imaging function of an electronic camera, an imaging optical system 2 consisting of a lens, etc., a CCD, a CP, etc.
It has a solid-state imaging device 3 consisting of a D or MO5 type image sensor, and also records and records the captured images.
For the reproduction function, a magnetic disk 4 as a storage medium,
It has a recording head 5, a reproducing head 6, and a motor block 7 for driving these magnetic disk 4, recording head 5, reproducing head 6, and the like. Further, 8 is a power switch, 9 is a mode changeover switch, 11 is a shutter switch, 12 is a speaker for audio reproduction, and 13 is an antenna for receiving television broadcast waves.

Regarding the aperture adjustment mechanism etc. for the functions of the electronic camera, since it has no direct relation to the gist of the present invention and is also disclosed in, for example, Japanese Patent Application Laid-Open No. 58-215872, etc., FIG. Illustrations are omitted here.

Next, FIG. 3 is a block diagram showing the entire system of the portable television with electronic camera of this example.

A TV video signal forming block 20 for receiving TV broadcast radio waves and forming a TV video signal includes an antenna 13
The tuner part 21 is further comprised of a high frequency amplifier 22, a mixer 23, and a local oscillator 24, and the video signal forming circuit 25 is an intermediate frequency amplifier. 26, a video detector 27, and a video amplifier 28.

Note that each of the above-mentioned elements is well known, so a description of their operations and the like will be omitted.

On the other hand, an imaging block 40 provided for taking so-called electrophotography is composed of the above-described imaging optical system 2, solid-state imaging device 3, and imaging signal forming circuit 41. The imaging signal forming circuit 41 includes a synchronizing signal generating circuit 42 that forms a timing control signal necessary for performing imaging using the solid-state imaging device 3;
The solid-state imaging device 3 according to the timing control signal from
and an imaging signal processing circuit 44 that outputs an imaging signal Vp based on inputs from the solid-state imaging device 3 and the synchronization signal generation circuit 42.
It is composed of.

The video signal switching circuit 29 is provided as a switching control means for supplying either the video signal Va or the imaging signal Vp to the video signal processing block 30 according to the state of the mode changeover switch 9.

The video signal processing block 30 includes the video signal switching circuit 2
A sync separation circuit 31 receives the video signal Va or the imaging signal Vp inputted through the sync signal 9, performs sync separation, and outputs horizontal and vertical sync signals. a control signal generation circuit 32 for forming each timing control signal c for display driving, and the video signal Va or the imaging signal Vp which is an analog signal.
It is comprised of an A/D converter 33 for converting the image into a video display signal Vd consisting of a digital signal corresponding to the brightness level.

Video signal V' output from the video signal switching circuit 29
a or the imaging signal Vp and the synchronization signal from the synchronization separation circuit 31 of the video signal processing block 30 are static signals for extracting the still image signal Vf corresponding to the still image at IR level from the video signal Va or the imaging signal Vp. It is configured so that it is also input to the image signal forming block 35.

The still image signal forming block 35 generates one unit of still image signal from the video signal Va or the imaging signal Vp based on the shutter trigger signal from the shutter switch 11 and the synchronization signal from the synchronization separation circuit 31 of the video signal processing block 30. A control signal generation circuit 36 generates a timing control signal necessary for extracting the video signal V according to the timing control signal from the control signal generation circuit 36.
The frame extraction circuit 37 extracts one frame (or one field) worth of signal from the image signal Vp or the image pickup signal Vp as a still image signal Vf and supplies it to the image recording block 50.

The image recording block 50 is composed of a recording signal processing circuit 51 consisting of a low-pass filter (hereinafter referred to as LPF) 52 and a frequency modulation circuit 53, an amplifier circuit 54, and a recording head 5. The incoming still image signal Vf is passed through the LPF 52 with components in a band of, for example, about 4 MHz or less passed through the frequency modulation circuit 53 at one peak level.
．． 5 MHz, and 5.5 M at the other peak level
The signal is frequency modulated to have a frequency of about Ilz, and the frequency modulated signal is further supplied to the recording head 5 via the amplifier circuit 54, so that recording on the magnetic disk 4, which is a storage medium, is performed. It is composed of

On the other hand, an image reproduction signal forming block 60 that forms an image reproduction signal for reproducing images recorded on the magnetic disk 4 includes a reproduction head 6, an amplification circuit 61, an image reproduction signal formation circuit 62, and an image reproduction signal processing block 60. It is composed of a circuit 67.

The image reproduction signal forming circuit 62 includes a bypass filter (hereinafter referred to as HPF) 63, an amplitude limiting circuit 64, a demodulation circuit 65, and an amplification circuit 66, and outputs the output from the reproduction head 6 for reading the recorded contents of the magnetic disk 4. The signal is
It is input to the HPF 63 via the amplifier circuit 61, and the HPF
After the components in a band of about 1.5 MHz or higher are passed through 63, they are input to a demodulation circuit 65 via an amplitude limiting circuit 64, and the signal demodulated by the demodulation circuit 65 is sent to an amplifier circuit 6.
6 as the image signal Pa through the image reproduction signal processing circuit 6
7.

The image reproduction signal processing circuit 67 includes a synchronization separation circuit 68 that receives the image signal Pa, performs synchronization separation, and outputs a synchronization signal, and converts the above-mentioned image signal Pa, which is an analog signal, into a digital signal corresponding to the brightness level. an A/D conversion circuit 71 for storing digital signals, and a memory circuit 72 consisting of a RAM or the like for storing digital signals from the A/D conversion circuit 71.
an addressing circuit 70 for specifying the address of the memory circuit 72; and an address specifying circuit 70 for supplying the digital signal to the address specifying circuit 70 based on a synchronization signal from the synchronization separation circuit 68 when writing the digital signal to the memory circuit 72; A control signal generating circuit 69 that forms an address increment signal and a write control signal W for supplying to the memory circuit 72, etc. and a control signal generation circuit 69 that reads out the memory contents of the memory circuit 72 and outputs it as an image reproduction signal Pd. A control signal generation circuit that generates an address increment signal to be supplied to the address designation circuit 70, a memory readout control signal R1 to be supplied to the memory circuit 72, and each timing control signal Pc for display driving, etc. It is composed of 73.

On the other hand, the display switching control circuit 75 selectively transfers either the signal from the video signal processing block 30 or the signal from the image reproduction signal processing circuit 67 to a display driving block 80 (described later) according to the state of the mode switching switch 9. This is provided as a switching control means for supplying the same.

That is, the display switching control circuit 75 includes a control signal switching circuit 76 for selectively outputting either the timing control signal Vc from the control signal generation circuit 32 or the timing control signal Pc from the control signal generation circuit 73. , a display signal switching circuit 77 for selectively outputting either the video display signal Vd from the A/D conversion circuit 33 or the image reproduction signal Pd from the memory circuit 72.
It is composed of.

The display drive block 80 is a direct drive block consisting of a shift register.
A parallel conversion circuit 81, a line memory 82 consisting of a launch circuit for launching the output from the serial/parallel conversion circuit 81, and supplying driving signals to the scanning side electrode and signal side electrode of the liquid crystal display device l, respectively. It is composed of a scanning side drive circuit 83 and a signal side drive circuit 84.

The serial/parallel conversion circuit 81 receives a video display signal V that is serially supplied via the display signal switching circuit 77.
d or image reproduction signal Pd into a parallel signal. line memory 82
is configured to latch the contents of the serial/parallel conversion circuit 81 according to the timing control signal Vc or Pc sent via the control signal switching circuit 76, and more specifically, the line memory 82 is configured to latch the contents of the serial/parallel conversion circuit 81. Inside, a video display signal V for one new scanning line is generated at each scanning shift timing of the scanning side electrode of the liquid crystal display device 1.
d or the image reproduction signal Pd are sequentially launched.

That is, the scanning side drive circuit 83 is configured to sequentially supply a scanning drive signal to each scanning side electrode of the liquid crystal display device 1 in accordance with the timing control signal Vc or Pc supplied via the control signal switching circuit 76. Further, the signal side drive circuit 84 is configured to supply a display drive signal to each signal side electrode of the liquid crystal display device 1 in accordance with the signals sequentially launched into the line memory 82. .

In FIG. 3, illustrations of power supply-related elements and power supply lines are omitted to simplify the drawing.

Each operation of the portable television with electronic camera of this example will be explained below.

First, when the mode changeover switch 9 is in the TV mode selection state, the mode changeover switch 9
The video signal switching circuit 29 is in a state of selectively outputting the video signal Va from the video signal forming circuit 25 of the video display signal forming block 20, and the display switching control circuit 75 is in a state of signal processing. It is in a state where the video display signal Vd and timing control signal Vc from the circuit 30 are selectively output.

Therefore, in this state, the video signal processing block 30 forms and outputs a synchronization separation signal, a timing control signal Vc, and a video display signal Vd based on the video signal Va inputted via the video signal switching circuit 29. At the same time, the display switching control circuit 75 is in a state of supplying the timing control signal Vc and the video display signal Vd to the display drive block 80.

As a result, the display drive block 80 drives the liquid crystal display device 1 according to the timing control signal Vc and video display signal Vd supplied via the control signal switching circuit 76 and the display signal switching circuit 77, respectively. Therefore, the liquid crystal display device 1 displays the video based on the television broadcast received by the video display signal forming block 20.

Also, as mentioned above, the mode selector switch 9 is set to
When in mode selection state, shutter switch 1
By the operation 1, it is possible to extract and record a desired scene from a television image as a still image.

That is, in the television mode selection state, the video signal Va output from the video signal switching circuit 29 and the synchronization signal output from the synchronization separation circuit 31 of the video signal processing block 30 are also transmitted to the still image signal forming block 35. It is in a state of being supplied.

Therefore, in this state, when the shutter switch 11 is operated, the control signal generation circuit 36
By receiving a shutter trigger signal based on the operation of One frame (or one field) of signals is extracted from the video signal Va supplied from the video signal forming circuit 25 via the signal switching circuit 29, and one
It is output as a still image signal Vf corresponding to a unit still image.

The above still image signal Vf is input to the image recording block 50, and as a result, the extracted still image is recorded on the magnetic disk 4 by the recording head 5.

Next, the electrophotographic photographing operation when the mode changeover switch 9 is in the photographing mode selection state will be described.

In this state, the video signal switching circuit 29 is in a state of selectively outputting the imaging signal Vp from the imaging block 40 according to the state of the mode selection switch 9, and the display switching control circuit 75 is in a state of selectively outputting the imaging signal Vp from the imaging block 40. 30
The video display signal Vcl and the timing control signal Vc are selectively output.

Therefore, in this state, the video signal processing block 30 generates the synchronization separation signal, the timing control signal Vc, and the video display signal Vd based on the imaging signal Vp supplied from the imaging block 40 via the video signal switching circuit 29. In addition to forming and outputting, the display switching control circuit 75
is in a state of supplying the timing control signal Vc and the video display signal Vd to the display drive block 80.

As a result, the display drive block 80 drives the liquid crystal display device 1 according to the timing control signal Vc and video display signal Vd supplied via the control signal switching circuit 76 and the display signal switching circuit 77, respectively. Therefore, the liquid crystal display device l has an imaging block 4.
0, the image being shot will be displayed.

Further, when the mode selector switch 9 is in the photographing mode selection state as described above, by operating the shack switch 11, it is possible to extract and record a desired still image as an electrophotograph from the video being photographed.

That is, in the shooting mode selection state, the imaging signal Vp output from the video signal switching circuit 29 and the synchronization signal output from the synchronization separation circuit 31 of the video signal processing block 30 are supplied to the still image signal forming block 35. is in a state of

Therefore, in this state, when the shank switch 11 is operated, the control signal generation circuit 36
By receiving a shutter trigger signal based on the operation of A signal for one frame (or one field) is extracted from the imaging signal Vp supplied from the imaging signal forming circuit 41 via the video signal switching circuit 29, and
It is output as a still image signal Vf corresponding to a unit still image.

The above still image signal Vf is input to the image recording block 50, and as a result, the still image extracted from the video being photographed by the imaging block 40 comprising the imaging optical system 2, solid-state imaging device 3, etc. , will be recorded on the magnetic disk 4 by the recording head 5 as an electrophotograph.

That is, in the above shooting mode, the liquid crystal display device 1
Since the image being photographed by the imaging optical system 2, the solid-state imaging device 3, etc. is to be displayed,
When taking a photo, the liquid crystal display device 1 displays a so-called view screen.
It will serve as a finder. Therefore, the photographer only needs to look for a desired photographic composition while looking at the display on the liquid crystal display device 1, and then operate the shutter switch 11.

Next, the operation of reproducing images recorded on the magnetic disk 4 will be explained.

When the playback mode selection state is set by the mode changeover switch 9, the display changeover control circuit 75 displays the image reproduction signal Pd and timing control signal Pc from the image reproduction signal forming block 60 according to the state of the mode changeover switch 9. It is controlled so that it is supplied to the drive block 80.

First, when the recorded content of the magnetic disk 4 is read by the reproducing head 6, the output signal of the reproducing head 6 is transmitted to the amplifier circuit 6.
The image signal Pa that is input to the image reproduction signal forming circuit 62 via the image reproduction signal forming circuit 62 through the image reproduction signal forming circuit 62 is inputted to the image reproduction signal processing circuit 67.

As a result, the synchronization separation circuit 6 of the image reproduction signal processing circuit 67
8 first separates and outputs a start reference signal indicating the beginning of the image signal Pa consisting of a signal of one frame, and thereafter separates and outputs a horizontal synchronizing signal until the image signal Pa of one frame ends to generate a control signal. Supplied to circuit 69. The control signal generating circuit 69 first outputs a cent signal for resetting the addressing circuit 70 in response to the start reference signal, and thereafter outputs the horizontal synchronizing signal as a reference until one frame of image signal Pa is completed. The memory write control signal W and address increment signal continue to be output at predetermined timing. Note that the memory write control signal W and the address increment signal are signals that have the same period and are out of phase with each other.

As a result, the digital signal indicating the brightness level output from the A/D conversion circuit 71 is sent to the address ( The contents of the address designating circuit 7o are also sequentially incremented according to the address increment signal from the control signal generation circuit 69.
After all, in response to the address designation signal from the address designation circuit 70 and the memory write control signal W from the control signal generation circuit 69, within each address of the memory circuit 72,
(2) Brightness level data based on the image signal Pa of the frame is sequentially stored and written.

When the contents of the address designation circuit 70 reach the value indicating the final address and the writing of the brightness level data based on the image signal Pa of one frame to the memory circuit 72 is completed, the contents of the address designation circuit 70 are initialized again. At the same time, the control signal generating circuit 73 starts outputting the memory read control signal R and the address increment signal, and reading out the stored contents from the memory circuit 72 starts. Note that the above-mentioned memory readout control signal R and address increment signal have the same period and are out of phase with each other; Necessary synchronization is achieved with the timing control signal Pc.

As a result, the storage contents within the designated address of the memory circuit 72 are read out every time the memory read control signal R is supplied from the control signal generation circuit 73, but the contents of the address designation circuit 70 are also read out when the control signal generation circuit 73 generates the control signal. In order to be sequentially incremented according to the address increment signal from the circuit 73,
As a result, the brightness level data corresponding to one frame of the reproduced image stored in the memory circuit 72 is sequentially read out from each address of the memory circuit 72 as the image reproduction signal Pd.

In addition, in the case of this reading, the addressing circuit 70
When the contents of the address specification circuit 70 reach the value indicating the final address, the contents of the address designation circuit 70 return to the initial value again in response to the next address increment signal from the control signal generation circuit 73, and the contents of the address specification circuit 70 again return to the initial value. Since the readout is repeated, the image reproduction signal P is not output from the memory circuit 72 while the reproduction mode selection state is maintained.
d continues to be output repeatedly and cyclically.

Therefore, in this state, the display drive block 80 receives the timing control signal Pc supplied via the control signal switching circuit 76 and the display signal switching circuit 77, respectively.
Since the liquid crystal display device 1 is driven according to the image reproduction signal Pd, the liquid crystal display device 1 reproduces and displays the still image recorded on the magnetic disk 4.

〔Effect of the invention〕

As described above, according to the present invention, by organically combining the components of an electronic camera and a mobile television, it is possible to individually realize the original electronic photographing function and the television broadcast reception and video display function. However, by using some of the components of the TV video display function, such as the display device and display drive means of the TV, when taking an electronic photograph, the display device can be used as a shooting finder. It becomes possible to accomplish this. As a result, by using existing functional elements, it is no longer necessary to provide an optical viewfinder with a relatively complex structure, and a new portable electronic device that has the functions of an electronic camera and a portable television can be created. This can be realized at low cost.

[Supplement] In the above-mentioned embodiment, the liquid crystal display device l is configured as a so-called black and white display device to simplify the explanation, but the present invention also applies when a display means for color display is used. , it is clear that it can be applied.

[Brief explanation of the drawing]

Figures 1 to 3 show a portable television with an electronic camera according to an embodiment of the present invention, with Figure 1 being a perspective view showing its appearance, and Figure 2 schematically showing some of its components. FIG. FIG. 3 is a block diagram showing the entire system.

Claims (1)

[Scope of Claims] +l) Video display signal forming means for receiving television broadcast radio waves and forming signals for displaying television images; imaging means for photographing images and forming imaging signals; still image signal forming means for extracting a still image signal corresponding to one unit of still image from the image pickup signal from the means; and storing and writing the still image signal from the still image signal forming means into a predetermined storage medium. an image recording means for driving a display device; a display driving means for driving a display device; and a display driving means for selectively supplying one of the television image display signal and the imaging signal to the display driving means. A portable television with an electronic camera, characterized in that it is equipped with a display switching means. (2) A portable television with an electronic camera according to claim 1, wherein the storage medium is a magnetic disk.