JPS5834793B2 - mobile phone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable electronic watch, and more particularly to a portable electronic watch that can selectively display the time and time using a television video signal and a built-in time measuring device, and can also display time and time using a television video signal and a built-in time measuring device. This invention relates to a portable electronic watch that is capable of selectively enlarging and displaying a portion of a video signal, and further displaying the enlarged display position on the display device at the same time as displaying the entire video signal. .

When displaying images transmitted by television (hereinafter abbreviated as TV) on a small display device such as a wristwatch display device, the image is often small and generally difficult to see.

In such a case, you can accurately understand the information in the image by enlarging the part.

For example, an image representing the time may be inserted into the received video at the same time as the original video.

According to the present invention, it is possible to display an image representing the time on a display device to know the accurate time, and thereby to adjust the time of the built-in time measuring device as appropriate. It is now possible to enlarge only a part of the screen to fill the entire display device, and also to display the enlarged position on the normal video screen so that it can be easily determined whether the enlarged part is a visit. The present invention provides a portable electronic watch.

That is, a TV received image is generally not a still image, and therefore, if a specific portion is to be selectively enlarged and displayed for clear viewing, it is necessary to select an enlargement position in a short time.

However, the conventional TV screen selection enlargement device for a portable watch has a single display device, so the selection result of the enlargement position cannot be known unless the screen is actually enlarged. Therefore, unless the device is capable of enlarging only one specific location, in the case of a device that can selectively enlarge multiple locations, the user must memorize the relationship between the magnification position and the magnification switch button, or each time the user is required to memorize the relationship between the magnification position and the magnification switch button. This involved the hassle of having to look at the product to confirm it, which ended up lowering the product's value.

The present invention has been made in order to eliminate such drawbacks in the conventional portable electronic watches that have a single display device. If you make a mistake, you can quickly correct it and enlarge the selection in a short time.Furthermore, if you roughly memorize the position of the enlargement switch, you can easily change the display screen each time. This allows you to reliably select the enlargement position without having to look outside the room to confirm.

The details will be explained below based on the illustrated embodiment.

FIG. 1 is an external view showing an embodiment of a portable electronic watch according to the present invention. In the figure, reference numeral 1 indicates the received video by the built-in TV signal receiving section and the time etc. by the built-in time measuring device. This is the side provided with glass that allows the display device 2 to be seen through.

On side 1, there are a display selection switch button 3 for selecting the TV and time display, a time adjustment switch button 4, a reception frequency selection switch button 5, and a screen enlargement switch button 6 for enlarging a part of the image. , an enlargement position selection switch button 7 for selecting the enlargement position of the video screen;
Furthermore, if a non-self-luminous display device such as a liquid crystal or PLZT is used for the display device, TVs that can be displayed even in dark times such as at night.
Switch buttons 8 are operable to turn on lamps, light emitting diodes, etc. so that video signals, time, etc. can be viewed.

FIG. 2 shows a specific example of the display device 2 used in the portable electronic watch according to the present invention, in which row electrodes X and column electrodes are made by thin film technology with a liquid crystal layer (not shown) in between. It has a structure in which an electrode Y is provided.

In this embodiment, the row electrodes X and the column electrodes Y each have 100 electrodes X1 to X1oo and Y1 to Y□.

It is composed of o.

Since the TV screen has an aspect ratio of 3:4, electrodes X1 to X1
Electrodes Y1 to Y for each interval of oo.

Each interval of 0 is set to 4/3 times. The operation of the display device 2 having such a configuration is such that, for example, when a necessary voltage is applied between the electrodes X2 and X3, the transmittance of the liquid crystal layer at the portion where they intersect is different from that in the absence of an electric field. Accordingly, that part performs a display operation, and by applying a selected voltage to the electrodes X1 to X1oo and electrodes 1 to Y1oo, images or characters such as numbers can be displayed.

FIG. 3 is a diagram showing a specific example of the circuit portion of the portable electronic timepiece according to the present invention, the details of which will be explained next.

In FIG. 3, reference numerals 9 to 18 indicate a group of circuits constituting a receiving section that receives TV video signals, including a high frequency amplification circuit 9,
A same wave number conversion circuit 10 mixes the amplified signal with a signal of a frequency oscillated by a local oscillation circuit (not shown) to obtain a video intermediate frequency signal, and a video intermediate frequency converter circuit 10 that obtains a video intermediate frequency signal; an amplifier circuit 11; a video detection/amplification circuit 12 that detects and amplifies the output from the video intermediate frequency amplification circuit 11; and a vertical synchronization signal and a horizontal synchronization signal from the output from the video detection/amplification circuit 12. A synchronous separation/amplification circuit 13 that separates and amplifies the signal, an integration circuit 14 that integrates the output signal from the synchronous separation/amplification circuit 13, a differentiation circuit 15 that differentiates the output signal, and a vertical synchronous signal that shapes the output of the integration circuit 14. a waveform shaping circuit 16 for obtaining pulses (hereinafter abbreviated as vertical pulses); a waveform shaping circuit 17 for waveform shaping the output of the differentiating circuit 15 to obtain horizontal synchronizing signal pulses (hereinafter abbreviated as horizontal pulses); It is composed of a comparison circuit 18 that compares the level of the video signal output from the video detection/amplification circuit 12 with a predetermined reference level, and roughly divides the video signal into white level and black level and outputs them. .

Although the operation of such a receiving section can be easily understood from the operation of a well-known TV receiver, it will be explained in order to better understand the present invention.

Taking as an example a TV broadcast signal in Japan, which has 525 scanning lines and a frame frequency of 30 Hz (field frequency of 60 Hz due to interlaced scanning) as a standard, vertical pulses are output from the waveform shaping circuit 16 at a period of 16.66 m5, and the synchronization rate is 63 m.
．． A horizontal pulse is output from the waveform shaping circuit 17 in 5 μs.

Furthermore, assuming that the horizontal retrace period is 16, the video signal has a valid period of 53.3 μs for one scanning line, and the comparison circuit 1
8 is input.

Since the video signal is negatively modulated, the black level, which appears black, has a larger amplitude than the white level, which appears white on the TV screen.

The comparison circuit 18 extracts a signal such as a time display that appears white on a TV screen from other signals from the video signal, and displays it on the display device 2 described above so that it can be distinguished from other signals. The level of the video signal is compared with a comparison reference voltage slightly higher than the level, and a logic "0" signal is output for the black level, and a logic "1" signal is output for the white level.

Reference numerals 19 to 47 are circuits for selectively displaying the whole or a part of the video obtained by the TV signal on the display device 2, and will be explained below.

Reference numeral S11 denotes a contact 11a which is operated by the screen enlargement switch button 6 shown in FIG.

1 l b + 11 c, and this switch S11 is a switch S1□l S13 j described later.
It is linked with S14.

Reference numeral 19 denotes a 263-base ring counter to which the horizontal pulse output from the waveform shaping circuit 17 is input to the input terminal C via the switch Sll, and the vertical pulse from the waveform shaping circuit 16 is input to the reset terminal R. This ring counter 19 sequentially outputs logic "1" signals from output terminals a1 to a263 every time a horizontal pulse is input,
Reset by vertical pulse, all outputs are logic rOJ
After the vertical pulse is no longer input, the above operation is repeated using the horizontal pulse.

Output terminal a1 t S75 s of ring counter 19
Each of S150 is connected to three contacts 2a, 2b, and 2c of switch S2, which are switched by operating the enlarged position selection switch button 7 shown in FIG. A signal from the output terminal is supplied to an input terminal T of a flip-flop circuit (hereinafter abbreviated as FF) 22.

The output of the FF 22 is supplied to the control terminal G of the gate circuit 20 and is also input to one input terminal of the AND circuit 23 .

The gate circuit 20 allows the horizontal pulse inputted from the waveform shaping circuit 17 via the switch Sll to pass through the decimal ring counter 21 only during the period when the output of the FF 22 is logic "1".

A vertical pulse is input to the reset terminal R of the ring counter 21, and the output terminal a10 of this ring counter 21
0, when the number of horizontal pulses input through the gate circuit 20 reaches 100, a logic "1" signal is output, and this output signal is supplied to the reset terminal R of the F and F 22. Ru.

On the other hand, a horizontal pulse is input to the other input terminal of the AND circuit 23 via the switch Sit.

Therefore, for example, if the switch S2 is turned on to the contact 2b, the AND circuit 23 outputs the 76th horizontal pulse for the first time after the vertical pulse is released, and the following 1.
The 7575th horizontal pulse is output.

The above explanation numerals 19 to 23 are circuits for determining the vertical position of the enlarged screen forming part of the enlarged display and enlarged position display circuit, and the switch S2 is for selecting the vertical position.

Reference numeral 24 indicates that the horizontal pulse is input to the input terminal C via the switch S1□ having three contacts 12a, 12b, and 12c.
This is a 5-ary ring counter in which the vertical pulse is input to the reset terminal R. Every time a horizontal pulse is input, a logic "1" signal is output from the output terminals a0 to a5 in sequence, and the vertical pulse is input to the reset terminal R. It is reset and the above operation is repeated again.

This ring counter 24 is for displaying the entire video screen obtained by the video signal.

Reference numeral 25 is a binary ring counter that constitutes an enlarged display and enlarged position display circuit, in which the horizontal pulse output from the AND circuit 23 is input to the input terminal C, and the vertical pulse is input to the reset terminal R. Each time a signal is input, a logic "1" signal is alternately output from the output terminals a1 and a2, and the signal is reset by a vertical pulse, and the above operation is repeated again.

Reference numeral 26 denotes an oscillation circuit, which is 53.3 of the effective scanning time.
At least 100 puzzles corresponding to the number of column electrodes Y of the display device 2 are generated during μs, and a number of pulses corresponding to the enlargement ratio when displaying a part of the image in enlargement are generated.

In this embodiment, the screen enlargement ratio is 6.25 times, so the oscillation frequency of the oscillation circuit 26 is 1.87 M for normal display.
Hz' and 4.67 MHz for enlarged display.

The output signals of two frequencies outputted from the oscillation circuit 26 are changed to a 1.87 MHz signal when the video screen is displayed normally and when the image is displayed in an enlarged position, and a signal of 1.87 MHz when the image screen is displayed in an enlarged position by a switch 14 having three contacts 14a, 14b, and 14c. Sometimes a 4.67 MHz signal is supplied to the gate circuit 41.

On the other hand, the 4.67 MHz signal is directly supplied to the 300-decimal ring counter 27 and the 118-decimal ring counter 28 .

The ring counter 27 sequentially outputs logic "1" from the output terminals a1 to a3oo every time the 4.67 MHz signal is input.
” and outputs a signal from output terminal a1. a8°.

The output from a1□6 is sent to the FF 29 via a switch S3 having three contacts 3a, 3b, and 3c, which are switched by operating the enlarged position selection switch button 7 shown in FIG. 1 counterclockwise. It is supplied to input terminal T.

The output of the FF 29 is inputted to the reset terminal R of the ring counter 28 via the inverter 30, and is also input to the other input terminal of a two-person AND circuit 31, to which the output from the output terminal a1 of the ring counter 25 is inputted. Manual input is applied to the input terminal.

The ring counter 28 counts 4.67 MHz signals from the time when the signal input to the reset terminal R becomes logic "0", and when it counts 118, outputs a logic "1" signal from the output terminal a118, Supplied to reset terminal R of FF29.

Note that the reset terminal R of the ring counter 27 is supplied with the output from the output terminal a2 of the ring counter 25.

The circuits indicated by numerals 25 to 30 above are circuits for determining the horizontal position of the enlarged screen forming part of the enlarged display and enlarged position display circuit, and the switch S3 is for selecting the horizontal position. It is.

Symbol S13 is a switch having three contacts 13a, 13b, and 13c, contacts 13a and 13b are grounded, and 13c is grounded.
A high potential voltage such as power supply voltage VDD is applied to.

The signal obtained by this switch S13 is inputted to one input terminal of an AND circuit 33 via an inverter 32, and is also directly inputted to one input terminal of an AND circuit 34 and an AND circuit 35.

The other input terminal of the AND circuit 33 is connected to the AND circuit 31.
The output of the AND circuit 33 is input to the other input terminal of a 3σR circuit 36, one input terminal of which receives the video signal output from the comparison circuit.

The signal from the output terminal a2 of the ring counter 25 is input to the other input terminal of the AND circuit 34, and the signal from the output terminal a2 of the ring counter 24 is input to one input terminal.
The output from 5 is input to the other input terminal of the OR circuit 37.

The output of the OR circuit 37 is supplied to the reset terminal R of the 120-decimal shift register 42 via the inverter 38.

The output from the output terminal a4 of the ring counter 24 and the output from the AND circuit 34 are input to the OR circuit 39, and this output is supplied as a clock to the 100-bit memory 43.

On the other hand, the control terminal G of the gate circuit 41 is supplied with the output of an OR circuit 40 into which the output from the output terminal a2 of the ring counter 24 and the output from the AND circuit 35 are input.
The gate circuit 41 allows the signal from the oscillation circuit 26 to pass through the clock terminal CL of the 120-decimal shift register 42 only during the period when the control terminal G is at logic "1".

The explanatory symbols 32 to 41 are circuits that are driven in any case of normal display, enlarged display, and enlarged position display.

The data input terminal of the shift register 42 has the above-mentioned OR
The output from the circuit 36 is supplied, sampled by clock pulses, and sequentially set in the shift register 42.

The set signal is cleared by the input reset signal.

Note that the timing at which the signal is cleared is at the rising edge of the signal input to the reset terminal R.

Among the signals set in the 120 registers of the shift register 42, 100 registers excluding the 20 registers where the retrace signal is set.The reset video signal is transferred from the output terminal Q to the 100-bit data in the memory 43. The contents of the shift register 42 are stored and output is held at the timing when the clock input to the input terminal and input through the OR circuit 39 changes from logic "O" to "1" in the memory 43.

This output-held signal is input to the column drive circuit 45 that drives the column electrodes Y of the display device 2 via the switch circuit 44, and the signal converted to a predetermined voltage is applied to the electrodes of the column electrodes Y.
1 to Y1oo.

Reference numerals 84□ to S43 are switches operated by the display selection switch button 3 shown in FIG. 1, and the illustrated state represents a switching state in which a TV signal is displayed.

A row drive circuit 46 generates a predetermined voltage for driving the row electrodes X of the display device 2, and the generated voltage is input to the ring counter 47.

The ring counter 47, in which the signal outputted from the OR circuit 39 via the switch S48 is input as a clock pulse to the clock terminal CL, includes two 50-decimal first counters and a 50-decimal second counter. First, the first counter counts the clock pulses input to the clock terminal CL, and when a reset signal is input to the reset terminal R, the contents of the first counter are set to Qi and IJ, and then the second counter counts the clock pulses input to the clock terminal CL. The counter counts the clock pulses, and when the reset signal is input again, the contents of the second counter are reset, and the first counter counts the clock pulses.

The output of the first count of the ring counter 47 corresponds to the odd-numbered electrodes X, , X3°X6, of the row electrodes X of the display device 2.・
...Xo, and the output of the second counter is input to the even numbered electrodes X4. Input to X6...X1oo.

Note that the voltage output from the ring counter 47 corresponds to the voltage generated from the row drive circuit 46.

When displaying a TV signal, a vertical pulse is input to the reset terminal R of the ring counter 47 via the switch S4□.

The above is a circuit for displaying an image obtained by a TV signal. Next, a description will be given of a circuit for displaying the time of the built-in time measuring device indicated by reference numerals 48 to 54.

Reference numeral 48 is an oscillation circuit using a crystal oscillator or the like that oscillates a signal of, for example, 32.768 KHz, and the oscillation frequency is divided into IHz by a frequency divider circuit 49 consisting of a division stage that performs 1/2 frequency division in 15 stages. The frequency is divided into pulses that serve as the reference for time measurement.

The pulse output from the frequency dividing circuit 49 is 6 seconds corresponding to seconds.
Counting is carried out by a counter 50 that includes a sexagesimal counter corresponding to a 0-decimal number, and a decimal or 24-decimal counter corresponding to an hour.

The counted contents of the counter 50 are converted by a code conversion circuit 51 into a code suitable for display on the display device 2.

Reference numeral 52 indicates a signal output from the oscillation circuit 48,
It is a variable frequency divider circuit that divides the frequency into a 3KHz signal, and its output is input to the clock terminal of the ring counter 47 via the switch 843, and a serial converter that converts the output of the code conversion circuit 51 into a serial signal. It is input to the clock terminal CL of the circuit 53.

The serial conversion circuit 53 converts the output of the code conversion circuit 51 into a serial signal in synchronization with the clock input to the clock terminal CL.

The serial conversion circuit 53 has 100 parallel output terminals corresponding to the column electrodes Y of the display device 2, and each serial signal outputted from these terminals is connected to a switch 541 (a terminal to which the power supply voltage VDD is applied to one end). is input to the column 1 drive circuit 45 via the switch circuit 44 if the signal (connected to 1) is switched opposite to the state shown.

Reference numeral 54 denotes a terminal Q5 that generates an output pulse every time 50 pulses output from the variable frequency dividing circuit 52 are counted.
0 and a terminal Q1o which generates an output pulse every time it counts 100 pieces.The output pulse from the terminal Q5o is sent to the ring counter 47 via the switch S42.
The output from the terminal Q100 is input to the control terminal C of the serial conversion circuit 53.

That is, the serial conversion circuit 53 starts serializing the output of the code conversion circuit 51 by inputting a pulse to the control terminal, and always connects the row electrodes X1. X3...Xo,
.

X2. The sequential driving of X4...X1oo and the synchronization with the corresponding serial signals are performed.

The operation of the portable electronic timepiece having such a configuration will be explained next.

First, switches 811 to S14 and switches 84□ to
The operation when switching S43 to the illustrated state and displaying the entire TV video signal (normally) on the display device 2 is as follows.

As mentioned above, the vertical synchronization signal included in the composite video signal of Japan's standard TV signal that uses interlaced scanning has a period of 16.6.
6 m5, during which one field scan was made, and 2
Scanning one frame is completed by scanning the field twice.

On the other hand, the horizontal synchronizing signal is repeated at a period of 63.5 μs, and there are 262 signals per field and 525 signals per frame.
pieces are sent out.

The output of the integrating circuit 14 is related to the vertical synchronizing signal and equalization pulse, and the waveform shaping circuit 16 is designed so that the width of the vertical pulse output from the waveform shaping circuit 16 is equal to the vertical blanking period. I'll keep it.

As is well known, during this vertical retrace period, the horizontal synchronizing signal is
The length includes

During the first field scanning period, 263 horizontal pulses are input to the 5-ary ring counter 24 via the switch S1□, and during the second field scanning period, 263 horizontal pulses are inputted to the quinary ring counter 24.
62 horizontal pulses will be input, but since a vertical pulse is input to the reset terminal R, the number of horizontal pulses actually counted by the ring counter 24 is 247 in the first field scan and 247 in the second field scan. becomes 246 pieces.

Considering the operation after the vertical pulse disappears and the reset is released with reference to FIG. 4, when the horizontal pulse represented by A is input to the ring counter 24, 63. The logic "
For example, from the output terminal a2, as shown by B, an output is generated every time the second horizontal pulse and the seventh horizontal pulse are input.

Now, when the second horizontal pulse is input and the output terminal a2 becomes logic "1", the gate circuit 41 passes the 1.87 MHz clock pulse generated by the oscillation circuit 26 to the shift register 42. .

Since the period during which the gate circuit 41 is open is 63.5 μs, 11 is stored in the 120-decimal shift register 42 during this period.
Eight clock pulses are input, and a video signal sampled by the clock pulses and output from the comparator circuit 18 is set.

Since the effective scanning period of the scanning line is 53.3 μs, the effective component of the video signal set in the shift register 42 is:
■There are 199th to 18th.

Since this is interlaced scanning and the second horizontal pulse after the vertical pulse actually corresponds to the third scanning line, the shift register 42 contains the video signal included in the third scanning line. be remembered.

The contents stored in the 118th to 199th positions of the shift register 42 are stored in the memory 43 at the timing when the fourth horizontal pulse is output and the output terminal a4 of the ring counter 24 changes to logic "1". .

Further, by inputting the output of the output terminal a4 to the ring counter 47, a predetermined voltage generated from the row drive circuit 46 is applied to the electrode X1 of the row electrode X of the display device 2.

The memory 43 stores its contents and outputs its contents to the terminal Q.
The output from the column electrode Y of the display device 2 is inputted to the column drive circuit 45 via the switch circuit 44.
Each electrode from ¥1 to Y.

0, drive voltages corresponding to the levels divided into two by the comparison circuit 18 of the video signal included in the third scanning line are applied.

Therefore, a display corresponding to the video signal output from the comparator circuit 18 is made on the electrodes \1 to Y1oo that intersect with the electrode X1.

The fifth horizontal pulse is input to the ring counter 24,
When the output terminal a becomes logic “L”, it is output to the OR circuit 3.
7 and the inverter 38 to the reset terminal R of the shift register 42.
2 is reset.

However, even during this time, the video signal is stored and held in the memory 43.

C in FIG. 4 represents the operating state of the shift register 42, and D represents the operating state of the memory 43.

In addition, ■3. (2) 13 means the video signals included in the third and 133rd scanning lines, respectively.

During the first field scanning period, 247 valid horizontal pulses are output as described above, so 49 pulses are output from the output terminal a4 of the ring counter 24.
By inputting this to the ring counter 47 described in detail above, the row electrodes X of the display device 2 are set to the odd-numbered electrodes X0. during the first field scanning period. X3...X,
7 are sequentially driven.

As can be seen from the above description, the video signal stored in the memory 43 when the electrodes X and 7 are driven corresponds to the 483rd scanning line.

The ring counter 24 is reset by a vertical pulse emitted between the end of the first field scan and the start of the second field scan, and the ring counter 47 becomes ready for operation.

With the start of the second field scan, the memory 43 is
The video signal stored in X2 . X
4...X, 8 are sequentially driven.

Upon completion of the second field scan, one frame scan is completed, and the entire TV video signal is displayed on the display device 2.

Next, connect the switches 811 to S14 to each contact 11C212.
c, 13c, and 14c side, and switch 841 to S4.
The operation when a part of the video signal is enlarged and displayed on the entire display screen by putting the switches S2.3 into the illustrated state is as follows. An example will be explained in which S3 is inserted into the 2b and 3b sides, respectively.

The horizontal pulse output from the waveform shaping circuit 17 is supplied as a clock pulse to a ring counter 19 for selecting the vertical position of the screen to be enlarged, and the output terminal a? From 5, vertical pulse (reset pulse)
When 75 horizontal pulses are input from the point in time when the signal disappears, a signal of logic "1" is output.

This signal causes the logic “1” to be output from the output terminal Q of the FF22.
" signal is output, and this signal is logic "1" period, 2
AND
A horizontal pulse is input through the circuit 23, and during this time the gate circuit 20 passes the horizontal pulse to the input terminal C of the ring counter 21.

The ring counter 21 outputs an output terminal a1o after counting 100 horizontal pulses.

outputs a logic “1” signal, and this signal causes F
F22 is reset and pulses from the AND circuit 23 and gate circuit 20 are no longer output.

Therefore, 100 horizontal pulses from the 76th to the 17575th are input to the input terminal C of the ring counter 25.

Similarly, 100 horizontal pulses are input during the second field scanning period.

The ring counter 25 is basically the same as the ring counter 2.
It performs the same operation as 4.

The output terminal al t 22 of the ring counter 25 sequentially outputs a logic "1" signal every time two horizontal pulses are input.

A signal is output from the output terminal a1, and the AND circuit 31
During the period when the signal applied to the other input terminal of
, 67 MHz pulses are passed to the clock terminal CL of the shift register 42.

Further, when a horizontal pulse is input to the ring counter 25, the output terminal a2 changes from the logic rOJ to "1".

At this rising timing, the memory 43 stores the contents of the shift register 42 and holds the output.

Furthermore, the shift register 42 is cleared at the timing when the output terminal a2 falls from logic "1" to "0".

In this way, the ring counter 19 can determine the upper end of the enlarged position of the video screen, and the ring counter 21 can determine the lower end.

FIG. 5 shows the enlarged vertical position when the switch S2 is in the illustrated state (closed to the contact 26 side) and the signal applied to the other input terminal of the AND circuit 31 is set to logic "1". It is indicated by a diagonal line E.

A 4.67 MHz pulse generated by the oscillation circuit 26 is input to the ring counter 27 at the input terminal C, but since the magnification rate is 6.25 times, this pulse is 25.4 μS ( Approximately 1 scanning period of one scanning line
/2.5 times), and 118 clock pulses are input to the shift register 42 as clock pulses.

Output terminal a of the ring counter 27 that counts these pulses
When 89 pulses are input from the time when the signal from the output terminal a2 of the link counter 25, which is input to the reset terminal, becomes the logic rOJ, a logic "1" signal is output from 89.

This signal causes the logic “1” to be output from the output terminal Q of the FF29.
" signal is output, and the ring counter 28 starts counting from the 90th pulse.

During this time, one input terminal of the AND circuit 31 (i.e. FF
The output terminal Q) of 29 is logic "1".

The ring counter 28 starts counting from the 90th pulse, and when 118 pulses are counted, the output terminal a
A logic "1" signal is output from 1 and 8.

This signal resets the FF 29, and the input terminal of the AND circuit 31 changes to logic "0".

Therefore, the output of the AND circuit 31 changes to logic "O" even if a logic "1" signal is output from the output terminal a1 of the ring counter 25.

In this way, the left and right enlarged positions of the video screen are determined by the ring counters 27 and 28.

In FIG. 6, the enlarged horizontal position is indicated by a diagonal line F when the output terminal a1 of the ring counter 25 is always at logic "1" and the switch S3 is turned on to the contact 3b side.

The gate circuit 41 opens and closes under the control of the signal from the output terminal a of the ring counter 25 and the signal from the FF 29, and the gate circuit 41 opens and closes under the control of the signal from the output terminal a of the ring counter 25 and the signal from the FF 29.
Hz pulse is passed.

Hereinafter, the operations of the circuits 42 to 47 are the same as in the case of displaying the entire video screen (normally) as described above.

FIGS. 5 and 6 show - by way of example, switch S2. S
7 shows how the horizontal and vertical positions are determined when 3 is inserted into the illustrated state, but in reality, as shown by the shaded area G in FIG.
The vertical intersecting portions are determined and displayed on the display device 2.
The image is enlarged and displayed.

Similarly, switch S2. It will be easily understood that nine different enlargement positions can be selected in this embodiment by appropriately switching S3.

Next, each of the switches Sll to S14 is connected to the contact point 11b.

12b, 13b, 14b side, and switch S2. S3. The operation will be described when S41 to S4□ are put into the illustrated state and the entire video screen (normally) is displayed and the enlarged position is displayed at the same time.

When displaying the enlarged position, the ring counter 24 described above operates, and the clock pulse passing through the gate circuit 41 is 1.
It is 87 MHz.

On the other hand, circuits indicated by symbols 19 to 23 and circuits 25 to 30
The circuit shown is also working.

However, since the logic rOJ signal is input to the inverter 32 and the AND circuit 34.35 via the switch S13, the output of the AND circuit 31 and the output from the output terminal a2 of the ring counter 25 are output from the gate circuit 41.
, shift register 42, and memory 43.

Therefore, the video signal is displayed on the display device 2 in the same way as when displaying the entire image.

However, as described above, the output of the AND circuit 31 is connected to the switch S2. When S3 is turned on in the illustrated state, it is at logic "1" only for a period corresponding to the portion indicated by the needle line G in FIG.

Therefore, during this period, a signal of logic "1" is applied to one input terminal of the OR circuit 36 via the AND circuit 33, and the shift register 42 receives the above-mentioned AND signal.
A signal of logic "1" is applied only while the output of the circuit 31 is logic "1", regardless of the level of the video signal.

In addition, during normal display, the video signal of one scanning line out of five scanning lines is displayed, and since the ring counter 25 is binary, in the enlarged position display area, the video signal of one out of every two scanning lines is displayed. A black display is made.

In this way, by inserting a signal indicating the enlarged position into the same display device, the enlarged position can be clearly determined.

In this embodiment, the magnification ratio is set to 6.25 times, but it will be easily understood that it can be set arbitrarily by changing the oscillation frequency of the oscillation circuit 26, the ring counter 21, etc.

On the other hand, although not shown in the drawings, it is necessary to provide a circuit for determining the start conditions for the first and second counters of the ring counter 47.

Next, a description will be given of the operation when the switches 84□ to 843 are switched to the opposite state from the illustrated state and the time measured by the built-in time measuring device is displayed on the display device 2.

By grounding the switch S41, the switch circuit 44 outputs the serial conversion circuit 5 instead of the output of the memory 43.
3 is supplied to the column drive circuit 45.

In addition, the output terminal Q of the counter 54 is connected via the switch S4□.
,.

The output of the variable frequency divider circuit 52 is input to the reset terminal R of the ring counter 47, and the output pulse of the variable frequency dividing circuit 52 is input to the clock terminal CL of the ring counter 47 via the switch 843.

On the other hand, the output of the counter 50 which counts the 31 Hz reference pulse outputted from the frequency dividing circuit 49 and whose counting content represents the time is converted by the code conversion circuit 51 into a code suitable for display on the display device 2, and this output is Variable frequency divider circuit 52
The signal is sampled by the pulse output from the serial converter circuit 53 and converted into a serial signal by the serial converter circuit 53.

The serial signals are sequentially supplied to the column drive circuit 45 via the switch circuit 44.

On the other hand, since the same signal as the sampling pulse input to the serial conversion circuit 53 is sequentially input to the ring counter 47, the row electrodes X of the display device 2 are sequentially driven in synchronization with the serial signal.

Note that the driving format of the row electrodes X is similar to the above-described TV signal display operation, in which the odd-numbered electrodes X1. X3・
. X4...X
1oo are sequentially driven.

The code conversion circuit 51 and the serial conversion circuit 53 are configured so that a serial signal corresponding to the driving of the electrodes X1 to X100 is input to the column drive circuit 45.

At the same time that the second pulse is emitted from the output terminal Q50 of the counter 54, a pulse is also output from the output terminal Q100, thereby driving the serial signal output from the serial conversion circuit 53 and the row electrodes X, ~X1oo by 1. Synchronization with timing is achieved.

It will be understood that the above operation causes the display device 2 to display the time according to the count of the counter 50 of the time measuring device.

Although not shown in the drawings, when displaying the time of a built-in time measuring device, a switch is provided to cut off power supply to circuits that are not operating, such as a receiving section that receives TV video signals.

Furthermore, although not all shown in the drawings, when driving the display device 2 in a matrix according to this embodiment, circuit measures are taken to prevent crosstalk between display points (a phenomenon in which parts that are not desired to be displayed are displayed). Naturally, the third
From the output terminal a of the switch circuit 44 in the figure, the row drive circuit 4
Input to the input terminal b is also one of the measures.

Further, the video signal from the comparator circuit 18 has a black and white level.
If the value is 3 or more, a clearer image can be obtained, and when displaying in color, the display will further enhance the product's appeal. The effects of the present invention are further enhanced.

Although the above-mentioned time measuring device has been described as an example in which the time is displayed, the present invention is not limited to this, and for example, the time measuring device can display the time interval measurement results corresponding to the chronograph function at the same time or It will be easily understood that the effects of the present invention are similar even when all the additional functions of the original electronic timepiece are included, including when they are selectively performed.

In addition, in the above embodiment, the built-in time measuring device and the oscillation circuit for the TV reception video display part were separated, but if all the oscillation signal sources were made common, for example, the AT-cut crystal oscillator 8
．． 388,608 MHz), the effect of the present invention will be even greater if the necessary frequency can be obtained by dividing or multiplying by variable frequency dividing means or the like.

Although the details of the portable electronic timepiece according to the present invention have been described above based on the illustrated embodiments, the present invention is not limited to the illustrated embodiments, and various changes and improvements can be made.

For example, display devices can be constructed with display elements such as electroluminescence, PLZT, LED, electrochromic materials, FDP, etc. Also, changes in the enlargement position and magnification ratio of the screen, or expansion of the screen can be made by making slight circuit changes. realizable.

As described above, the portable electronic watch according to the present invention has a built-in receiving section that receives television video signals, and can display the received television video on a display device. While it is possible to know the exact time by displaying the image on the display device, it also has a circuit that enlarges a part of the image displayed on the display device and selectively displays it on the entire display device, so that the desired image portion can be displayed on the display device. In addition, when enlarging a part of the image, the selected enlargement position is simultaneously displayed on the normal video screen, so the selected enlargement position can be accurately and quickly displayed. At the same time, the desired part can be reliably enlarged and displayed, and the output of the built-in time measuring device can be displayed on the display device instead of the television image, so the television image signal It can be used as a normal watch when no signal is being received, so it can fully achieve its intended purpose and is extremely effective in practice.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an embodiment of the portable electronic watch according to the present invention, FIG. 2 is a schematic view of a display device used in the portable electronic watch shown in FIG. 1, and FIG. 4 is a system diagram showing a specific example of the circuit of the portable electronic watch according to the present invention.
The figure is a time chart for explaining the operation of the circuit shown in FIG. 3, FIG. 5 is a diagram showing an example of an enlarged position in the vertical direction, and FIG. 6 is a diagram showing an example of an enlarged position in the horizontal direction. 7th
The figure shows a portion where the enlarged positions shown in FIGS. 5 and 6 intersect. 2...Display device, 3...Display selection switch button, 6...Screen enlargement switch button,
7... Enlarged position selection switch button, 9-18
...TV video signal receiving section, 19 to 47...
...Circuit for selectively displaying the whole or a part of the TV video signal, 19-23.25-31...Enlarged display circuit, 19-23°25-36... Enlarged position display circuit, 48-50...Time measuring device, 51-
54...Circuit for displaying the time of the time measuring device, S, 1, 4□, S13゜S14...Select normal display, enlarged position display, enlarged display of television image switch, S2. S3...Enlarged position selection switch 'h 841 j 843...TV
Switch for selecting video signal and time display.

Claims (1)

[Claims] 1. A receiving section that receives a television video signal, a display device that displays the video signal obtained by the receiving section, and a part of the video displayed on the display device that is enlarged and selectively displayed on the display device. An enlarged display circuit for displaying, a screen enlargement switch button connected to this enlarged display circuit,
an enlarged position display circuit for displaying the enlarged position of an image enlarged on the display device at the same time as the image is displayed; an enlarged position selection switch button connected to the enlarged position display circuit; and a time measurement device. a time measuring device that counts reference pulses of a frequency that is a reference of the device, and whose counted contents correspond to the time and time; a circuit that causes the counted contents of the time measuring device to be displayed on the display device; and the television. A switch for selectively displaying the video signal and the count contents of the time measuring device on the display device, and selecting the enlargement position while displaying the enlargement position on the display device by using the enlargement position selection switch button. A portable electronic watch was stolen so that it could be used.