JP2002277575A - Receiver - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the size of an entire device by preventing an antenna from being affected by noise of a liquid crystal display device. A liquid crystal display device, an antenna provided below the liquid crystal display device, and driving stop means for stopping driving of the liquid crystal display device when the antenna receives radio waves. Accordingly, since the antenna 17 is provided below the liquid crystal display device 14, the size of the entire device can be reduced, and the driving of the liquid crystal display device 14 is stopped when the antenna 17 receives radio waves by the driving stop means. Even if the antenna 17 is arranged below the liquid crystal display device 14, the antenna 17 can be prevented from being affected by noise of the liquid crystal display device 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving device used for an electronic device such as an electronic timepiece.

[0002]

2. Description of the Related Art Conventionally, an electronic wristwatch has a radio wave reception function in addition to a time display function, receives a radio wave including time information by the radio wave reception function, and sets a time based on the time information of the received radio wave. There is a radio clock that is designed to correct. This type of electronic wristwatch includes, for example, a synthetic resin wristwatch case 1 as shown in FIG. A watch glass 2 is mounted on the front surface of the watch case 1, and various push button switches 3 for mode switching and light lighting are provided on the side surface of the watch case 1.

[0003] Also, inside the watch case 1, FIG.
The circuit board 4 shown in FIG. A liquid crystal display device 5 is supported on the circuit board 4 while being electrically connected by an interconnector 6. An antenna 7 is arranged on the circuit board 4 located on the 12 o'clock side (the right side in FIG. 13) of the liquid crystal display device 5 at a predetermined interval from the liquid crystal display device 5. On the 6 o'clock side (the left side in FIG. 13), a push button switch 8 for reception is arranged. As shown in FIG. 12, the push button switch 8 is provided with its button portion 8a protruding from the front surface of the watch case 1.

[0004]

However, in such an electronic wristwatch, since the noise of the liquid crystal display device 5 affects the reception of radio waves by the antenna 7, the antenna 7 is arranged at a position distant from the liquid crystal display device 5. Therefore, there is a problem that the watch case 1 becomes large, and the entire watch becomes large.

An object of the present invention is to reduce the size of the entire device by preventing the antenna from being affected by the noise of the liquid crystal display device.

[0006]

According to a first aspect of the present invention, there is provided a receiving apparatus comprising: a liquid crystal display device; an antenna provided below the liquid crystal display device; Drive stopping means for stopping the driving of the motor. According to the present invention, since the antenna is provided below the liquid crystal display device, the size of the entire device can be reduced, and the driving of the liquid crystal display device is stopped when the antenna receives radio waves by the driving stop means. Even if the antenna is arranged below the liquid crystal display device, the antenna can be prevented from being affected by noise of the liquid crystal display device.

In this case, as set forth in claim 2, the antenna is disposed so as to overlap a part of the liquid crystal display device, and the drive stopping means stops driving the portion of the liquid crystal display device where the antenna overlaps. By doing so, the antenna can be prevented from being affected by the noise of the liquid crystal display device.
Information can be displayed by driving the liquid crystal display device except for the portion where the antenna overlaps.

[0008] A receiving device according to a third aspect of the present invention provides a liquid crystal display device, an antenna arranged side by side on a side of the liquid crystal display device, and a combination of the antenna and the liquid crystal display device. And an input device disposed therebetween. According to the present invention, since the input device is disposed between the antenna and the liquid crystal display device, even if both the distance between the input device and the antenna and the distance between the input device and the liquid crystal display device are reduced, The input device allows the antenna to be sufficiently separated from the liquid crystal display device, so that the antenna is not affected by noise of the liquid crystal display device, and the overall size of the device can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment in which a receiver according to the present invention is applied to an electronic wristwatch will be described below with reference to FIGS. FIG. 1 is a front view of an electronic wristwatch of the present invention, FIG. 2 is an enlarged view schematically showing an internal structure taken along the line AA of FIG. 1, and FIG. 3 is a front view showing a state during radio wave reception in FIG. is there. This electronic watch is
As shown in FIG. 1, a watch case 10 is provided. The watch case 10 may be made of metal, but is preferably made of synthetic resin. A watch glass 11 is mounted on the front surface of the watch case 10, and various push button switches 12 for mode switching and light lighting are provided on the side surface of the watch case 10.

FIG. 2 shows the inside of the watch case 10.
As shown in FIG. 1, a circuit board 13 is arranged. On the circuit board 13, a liquid crystal display device 14 for electro-optically displaying information such as time is supported by an interconnector 15 while being electrically connected thereto. A push button switch 16 for radio wave reception is arranged on the circuit board 13 at a position located at the 6 o'clock side (the left side in FIG. 2) of the liquid crystal display device 14. As shown in FIG. 1, the push button switch 16 has a button portion 16 a protruding from the front surface of the watch case 10. An antenna 17 is mounted on the circuit board 13 below the liquid crystal display device 14.
4 are arranged. In this case, the antenna 17
Is located on the 12 o'clock side (the right side in FIG. 2) in the display area of the liquid crystal display device 14, as shown in FIG. It may be. Further, the liquid crystal display device 14 is configured so that the driving is stopped by a driving stop means described later when the antenna 17 receives a radio wave.

Next, a circuit configuration of the electronic wristwatch will be described with reference to FIG. The clock circuit 20 measures the current time, and the time information of the clock circuit is sent to the display drive circuit 21, converted into a display drive signal by the display drive circuit 21, and supplied to the liquid crystal display device 14. Then, the time information is displayed on the liquid crystal display device 14. The receiving circuit 22 is for receiving a radio wave including a time code by the antenna 17 and extracting the time code. The time adjustment control circuit 23 controls the reception circuit 22, the clock circuit 20, and the display drive circuit 21 to adjust the time every day at a predetermined time or when the reception push-button switch 16 is operated.

The time correction control circuit 23 sends a display drive signal a to the display drive circuit 21 at a predetermined time or when the push button switch 16 for reception is operated, and stops driving the liquid crystal display device 14. The operation start signal b is supplied to the receiving circuit 22 to start the operation, and the radio wave including the time code is received. The receiving circuit 22 extracts a time code from the received radio wave and supplies the time code to the time correction control circuit 23. When the reception is completed, the time correction control circuit 23
2, an operation stop signal c is sent to stop the operation of the reception circuit 22, and a display drive start signal d is supplied to the display drive circuit 21 to start display driving.
The time of the clock circuit 20 is corrected using the time code obtained in step (1).

As described above, in this electronic wristwatch, since the antenna 17 is arranged below the liquid crystal display device 14, the wristwatch is compared with the case where the antenna 7 is arranged away from the liquid crystal display device 5 as in the conventional example. Since the case 10 can be made much smaller, the size of the entire timepiece can be reduced, and the driving of the liquid crystal display device 14 is stopped when the antenna 17 receives radio waves. The antenna 17 can be prevented from being affected by the noise of the liquid crystal display device 14 even if the antenna 17 is disposed below the antenna.

[Second Embodiment] Next, a second embodiment in which the receiving apparatus of the present invention is applied to an electronic wristwatch will be described with reference to FIGS. The same parts as those in the first embodiment shown in FIGS. As shown in FIGS. 5 and 6, this electronic wristwatch has an antenna 1 at a position below the 12 o'clock side (upper side in FIG. 5) in the display area of the liquid crystal display device 30.
7 is arranged, and when a radio wave is received by the antenna 17, driving of a portion 30a of the liquid crystal display device 30 where the antenna 17 overlaps is stopped by driving stop means described later. It has almost the same configuration as.

That is, the liquid crystal display device 30 has the structure shown in FIG.
As shown in the figure, the date and day of the week (for example, SU 30) are displayed on the portion 30a of the display area where the antenna 17 overlaps at 12 o'clock, and the hour and minute are displayed in the center of the display area. The time (for example, 10:58) is displayed, and the second time (for example, 50) is displayed on the right side of the 6 o'clock side in the display area. As shown in FIG. 6, the liquid crystal display device 30 stops driving the portion 30a where the antenna 17 overlaps during radio wave reception, turns off the display of the date and day of the week, and displays the date and time in the display area.
The left side of the hour side is driven to display "receiving" indicating that the radio wave is being received.

The circuit configuration of such an electronic wristwatch is substantially the same as that of the first embodiment except that the time adjustment control circuit 23 is configured as follows. That is, the time correction control circuit 23 sends a display drive signal a to the display drive circuit 21 when a predetermined time or the push button switch 16 for reception is operated, and only the date / day portion 30a of the liquid crystal display device 14 is displayed. The driving is stopped and the liquid crystal display device 1 is stopped.
The left side of the 6 o'clock side of 4 is driven to display "receiving", and an operation start signal is supplied to the receiving circuit 22 to start the operation and receive a radio wave including a time code. When the reception of the radio wave is completed, the time correction control circuit 23 sends an operation stop signal to the reception circuit 22 to stop the operation of the reception circuit 22, and supplies a display drive start signal to the display drive circuit 21 to output the date drive signal. The driving of the day portion 30a is started and the driving of the portion displaying "receiving" is stopped.

In such an electronic wristwatch, the antenna 17 is arranged below the date / day portion 30a located on the 12 o'clock side in the display area of the liquid crystal display device 30. In addition to reducing the size of the whole, the liquid crystal display
Is stopped, the antenna 17 can be prevented from being affected by the noise of the liquid crystal display device 30, and the date and day of the liquid crystal display device 30 can be controlled during reception of this radio wave. Since the hour, minute, second time and "receiving" are displayed in the portions other than the day portion 30a, even while the radio wave is being received, the time can be known and the fact that the radio wave is being received is displayed. You can know.

In the second embodiment, the liquid crystal display device 30 stops driving only the date / day portion 30a where the antenna 17 overlaps, and the liquid crystal display device 3
Although the left part on the 6 o'clock side of 0 is driven to display “receiving”, the present invention is not limited to this, and may be configured as in a modified example shown in FIGS. 7 and 8, for example. That is, in this modified example, the antenna 17 is arranged below the date / day portion 30a of the liquid crystal display device 30, and the "radio wave receiving" is placed on the lower surface of the liquid crystal display device 30 located at the 6 o'clock side. A printing unit 30b on which a display is printed is provided, and as shown in FIG.
By driving a portion corresponding to the printing section 30b on which “0 receiving radio wave” is printed to display black, the display of “receiving radio wave” is hidden, and as shown in FIG. Sometimes, as in the first embodiment, the driving of the entire liquid crystal display device 30 is stopped, and the printing unit 3 on the 6 o'clock side of the liquid crystal display device 30 is stopped.
It is configured so that an indication of “receiving radio wave” appears on 0b. With such a configuration, in addition to the same operation and effect as the first embodiment, it is possible to know that the radio wave is being received.

Further, in the first and second embodiments and the modifications thereof, the entire antenna 17 is disposed below the liquid crystal display device 14 or 30, but the present invention is not limited to this. For example, as shown in FIG. , Part of the antenna 17 is connected to the liquid crystal display device 1
It may be arranged so as to protrude to the side of 4 or 30. Further, in the first and second embodiments and the modifications thereof, the push button switch 16 for radio wave reception is set to the button portion 16a.
Is provided so as to protrude from the front of the watch case 10,
However, the present invention is not limited to this. For example, a push button switch for radio wave reception may be provided on the side of the watch case 10. With this configuration, the size of the entire timepiece can be further reduced.

[Third Embodiment] Next, FIG. 10 and FIG.
With reference to FIG. 1, a third embodiment in which the receiving device of the present invention is applied to an electronic wristwatch will be described. In this case, the same parts as those of the conventional example shown in FIGS. As shown in FIGS. 10 and 11, this electronic wristwatch has a liquid crystal display device 5 and an antenna 7 on a circuit board 4 arranged in a synthetic resin wristwatch case 1.
Are arranged side by side in a plane, and a push-button switch 8 for reception, which is an input device, is arranged between the liquid crystal display device 5 and the antenna 7, and the other structure is the same as that of the conventional example. .

In this case, a watch glass 2 is mounted on the front of the watch case 1. In addition, the liquid crystal display device 5
Is mounted on the circuit board 4 as in the conventional example.
Are electrically connected to each other, and are arranged in the watch case 1 in this state in correspondence with the watch glass 2. Further, the push button switch 8 is provided on the circuit board 4 with the button portion 8a protruding from the front surface of the watch case 1, as shown in FIG.

In such an electronic wristwatch, since the push button switch 8 is disposed between the antenna 7 and the liquid crystal display device 5, the interval between the push button switch 8 and the antenna 7 and the distance between the push button switch 8 and the liquid crystal display device 5 The antenna 7 can be sufficiently separated from the liquid crystal display device 5 by the push button switch 8 even if both of the distances are narrowed, so that the antenna 7 is not affected by the noise of the liquid crystal display device 5. In addition to this, the watch case 1 can be made smaller than in the conventional example, thereby making it possible to reduce the size of the entire timepiece.

In the first to third embodiments, the case where the receiving device is applied to an electronic watch has been described. However, the present invention is not limited to this, and the present invention is also applicable to an electronic watch such as a pocket watch, a travel watch, and a table clock. In addition, the present invention can be widely applied to electronic devices equipped with a liquid crystal display device for displaying information such as time, for example, electronic devices such as calculators and electronic organizers.

[0024]

As described above, according to the first aspect of the present invention, since the antenna is arranged below the liquid crystal display device, the size of the entire device can be reduced, and
Since the driving of the liquid crystal display device is stopped when the antenna receives radio waves by the driving stop means, even if the antenna is arranged below the liquid crystal display device, the antenna is not affected by the noise of the liquid crystal display device. it can. In this case, the antenna is disposed so as to overlap with a part of the liquid crystal display device, and the drive stopping means stops driving the portion of the liquid crystal display device overlapping the antenna, so that the antenna is not affected by the noise of the liquid crystal display device. The information can be displayed by driving the liquid crystal display device except for the portion where the antenna overlaps, while receiving the radio wave from the antenna.

According to the third aspect of the present invention, the liquid crystal display device and the antenna are arranged side by side in a plane, and the input device is arranged between the antenna and the liquid crystal display device. Even if both the distance between the antenna and the input device and the distance between the input device and the liquid crystal display device are reduced, the antenna can be sufficiently separated from the liquid crystal display device by the input device. In addition to being able to be unaffected, the overall size of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment in which a receiving device of the present invention is applied to an electronic wristwatch.

FIG. 2 is an enlarged view schematically showing the internal structure of the wristwatch case as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is an exemplary front view showing a display state of the electronic wristwatch shown in FIG. 1 during reception of a radio wave;

FIG. 4 is a block diagram showing a circuit configuration of the electronic wristwatch of FIG. 1;

FIG. 5 is a front view of a second embodiment in which the receiving device of the present invention is applied to an electronic watch.

FIG. 6 is an exemplary front view showing a display state of the electronic wristwatch of FIG. 5 during reception of a radio wave;

FIG. 7 is a front view of the electronic wristwatch showing a normal display state in which radio waves are not received in the modification of the second embodiment of FIGS. 5 and 6;

FIG. 8 is an exemplary front view showing a display state of the electronic wristwatch shown in FIG. 7 during reception of a radio wave;

FIG. 9 is an enlarged view schematically showing the internal structure of another modification in which a part of the antenna is arranged to protrude to the side of the liquid crystal display device as viewed in the direction of arrows BB in FIG.

FIG. 10 is a front view of a third embodiment in which the receiving device of the present invention is applied to an electronic wristwatch.

FIG. 11 is an enlarged view schematically showing the internal structure of the wristwatch case as viewed in the direction of arrows CC in FIG. 10;

FIG. 12 is a front view of a conventional electronic watch.

FIG. 13 is an enlarged view schematically showing the internal structure of the wristwatch case as viewed in the direction of arrows DD in FIG. 12;

[Explanation of symbols]

 5, 14, 30 Liquid crystal display device 7, 17 Antenna 8 Push button switch 20 Clock circuit 21 Display drive circuit 22 Receiving circuit 23 Time correction control circuit

Claims (3)

[Claims] 1. A liquid crystal display, comprising: an antenna provided below the liquid crystal display; and driving stop means for stopping driving of the liquid crystal display when receiving radio waves from the antenna. Receiving device. 2. The liquid crystal display device according to claim 1, wherein the antenna is disposed so as to overlap with a part of the liquid crystal display device, and the driving stop means stops driving of a portion of the liquid crystal display device where the antenna overlaps. The receiving device according to the above. 3. A liquid crystal display device, comprising: an antenna arranged in a plane on a side of the liquid crystal display device; and an input device arranged between the antenna and the liquid crystal display device. A receiving device characterized by the above-mentioned.