JP2015121544A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus which is capable of receiving a radio wave excellently with increased settings for the size and resolution of a display screen.SOLUTION: The electronic apparatus includes: a digital display section; one board or a board including a stack of arranged multiple wire layers as a whole; connection sections which are connected to a control section provided on a first layer and to the display section; output wiring which connects the connection sections to the control section; and a receiving section which has a bar antenna and receives a radio wave. When the board is seen as planer view, the bar antenna is mounted on a location between positions that respectively correspond to a position of one of the connection sections and a position of the control section. Specifically, the bar antenna is mounted on a wire layer that serves as one of both outer sides of the multiple wire layers, and that serves as a second layer being different from the first layer. More specifically, the bar antenna is mounted on a surface that serves as a side opposite to a side where the first layer is provided. Further, the output wiring connected to an output terminal of one of the connection sections is provided on the first layer so as to pass across regions that correspond to both ends of the bar antenna. On the second layer, an electromagnetic shield section is provided in an area located between such both ends.

Description

  The present invention relates to an electronic device having a digital display screen and capable of receiving radio waves.

2. Description of the Related Art Conventionally, there is an electronic timepiece (radio timepiece) that can receive a long wavelength band radio wave (standard radio wave) including time information, acquire time data, and correct the held time information. In this radio-controlled timepiece, the correct time display can be maintained by correcting the current time periodically and based on the user's operation.

In the radio timepiece, a small antenna for receiving a standard radio wave is provided inside the casing. As a small antenna, a bar antenna is preferably used. However,
Many electronic circuits and electronic components generate noise in the long wavelength band, and noise from adjacent wiring and electronic components is likely to be mixed when receiving standard radio waves. In particular, in a small radio timepiece such as a wristwatch, electronic components, wirings, and antennas must be arranged closely, and thus problems related to noise mixing are likely to appear remarkably.

Therefore, in Patent Document 1, an end of the substrate is cut and an antenna space is provided in the portion, thereby maintaining the distance from the wiring or electronic component on the substrate to the antenna while maintaining a compact size. Technology is disclosed. On the other hand, Patent Document 2 discloses a technique for reducing the reception level of noise by disposing an antenna with a shield electrode sandwiched between the back surfaces of the end portions of a substrate.

JP 2010-273231 A JP 2012-58161 A

However, in an electronic device that receives radio waves in this way, a liquid crystal display (LC
When a digital display screen such as D) is provided, output terminal connectors are provided at both ends of the substrate, and each pixel or segment of the display screen provided between the connectors is voltage-driven to perform a desired display. Therefore, if the edge part of a board | substrate is cut by the technique disclosed by patent document 1, there exists a subject that the area of a display screen is reduced by that much. On the other hand, when an antenna is provided on the back surface of the end portion of the substrate by the technique disclosed in Patent Document 2, it is necessary to suppress the width of the connector to be less than the length of the antenna, and the number of output terminals cannot be increased. Therefore, there is a problem that it is difficult to provide a high-resolution display screen with a large number of output terminals or a dot matrix display screen.

An object of the present invention is to provide an electronic device that can perform radio wave reception satisfactorily while setting the size and resolution of a display screen large.

In order to achieve the above object, the present invention
A display for digital display;
A substrate on which a plurality of wiring layers are laminated in a single sheet or a plurality of sheets arranged in the thickness direction;
A control unit that is mounted and disposed on a first layer of the plurality of wiring layers and controls display in the display unit;
A connection portion provided in the first layer and arranged with a plurality of output terminals connected to the display portion;
A receiver having a bar antenna and receiving radio waves;
An output wiring provided in the first layer and connecting each of the plurality of output terminals and the control unit;
When the substrate is viewed in plan, the bar antenna is a wiring layer at either end of the plurality of wiring layers, and the first layer side in a second layer different from the first layer; Is mounted and arranged at a position between the positions corresponding to the positions of the one connection section and the control section on the opposite surface, and the output wiring connected to the output terminal according to the one connection section is The first layer is provided so as to pass between regions corresponding to both end regions including both ends of the bar antenna,
In the second layer, the region between the both end regions is a shielding region provided with a magnetic shielding unit.

According to the present invention, in the electronic device, there is an effect that radio wave reception can be performed satisfactorily while setting the size and resolution of the display screen large.

It is a front view which shows the electronic timepiece of embodiment of this invention. It is a block diagram which shows the internal structure of an electronic timepiece. It is a figure explaining the structure of an antenna. It is a figure explaining the board | substrate of an electronic timepiece. It is a figure explaining the board | substrate of an electronic timepiece. It is a figure which shows the example of a display on the display screen of an electronic timepiece. It is a figure which shows the example of a display on the display screen of an electronic timepiece.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an electronic timepiece 1 according to an embodiment of an electronic apparatus of the present invention.

The electronic timepiece 1 is a wristwatch type that can be worn on the user's arm by a band (not shown), and performs a digital display on the center of the upper surface of the annular casing 2 (the surface that does not contact the user's arm). A screen 31a is provided. Around the display screen 31a, a bezel 3 provided with scales and signs relating to various functions executable by the electronic timepiece 1 is provided. Push button switches 35 a to 35 f are provided on the side surface of the casing 2.

In the electronic timepiece 1 of this embodiment, the casing 2 is formed of a conductive metal member such as stainless steel. The lower surface of the casing 2 (the surface that contacts the user's arm) is closed by a back cover (not shown). Between the display screen 31a and the bezel 3 and the back cover, a four-layer substrate 6 and an antenna 33, which will be described later, are arranged and stored in order.

The bezel 3 may be a conductive metal member such as stainless steel or an insulating member such as a rubber member. The bezel 3 also functions as a frame-like member that fits and holds the display unit 31 including the display screen 31 a and fixes the display unit 31 to the casing 2.

Each of the push button switches 35a to 35f is provided with a sign indicating a corresponding function. The push button switches 35a to 35d are respectively provided with a sign “COMP” indicating an azimuth display function, a sign “BARO” indicating an atmospheric pressure display function, and a sign “ALT” indicating an altitude display function.
“I”, a sign “LIGHT” indicating lighting is provided. In addition, the push button switches 35e and 35f are each provided with an indicator “ADJUST” indicating use for adjustment of settings and the like related to various functions and an indicator “MODE” indicating switching of various functions.

The display screen 31a of the present embodiment is a digital display screen by liquid crystal display. The display screen 31a is provided with three display areas, an upper stage, a middle stage, and a lower stage, and it is possible to perform various displays by combining the respective display contents. In the basic display state shown in FIG. 1, an indicator showing the reception level of the radio clock, the day of the week, and the date are displayed on the upper part of the display screen 31a, and AM / PM (in this case, “P indicating PM” in the middle part). "),
A display “PS” indicating a mode for shifting to a power saving state under a predetermined condition based on the time (here, 10:58) and a measurement value of an illuminance sensor 56 (see FIG. 2) described later is displayed. In the lower part, an auto light mode is set in which the EL element 37a is turned on when it is detected that the display surface is in a predetermined tilt angle range based on a measurement value of an acceleration sensor 58 (see FIG. 2) described later. A display “LT”, a second of the current time (here, 50 seconds), a battery status (here, a display “H” indicating a high level), and a display for setting whether or not to generate sound such as an alarm function ( Here, the occurrence of a time signal, the presence of an alarm notification, the activation of the snooze function, and the absence of sound during operation of the push button switches 35a to 35f) are performed. Display unit 3
1, among these displays, for example, a portion showing a predetermined symbol indicating a time signal generation, alarm notification or snooze function at a preset position is displayed in a segment system,
In other parts, it is also possible to configure by combining so as to perform display in a dot matrix system.

FIG. 2 is a block diagram showing an internal configuration of the electronic timepiece 1 of the present embodiment.
The electronic timepiece 1 includes a display unit 31 and a display driver 32, an antenna 33 and a radio wave reception unit 34, an operation unit 35, a power supply unit 36, a CPU (Central Processing Unit) 41, an R
OM (Read Only Memory) 42, RAM (Random Access Memory) 43, and oscillation circuit 4
4, a frequency dividing circuit 45, a time measuring circuit 46 (time measuring unit), a notification unit 37, a pressure sensor 50 and its driver 51, a magnetic field sensor 52 and its driver 53, a temperature sensor 54 and its driver 55, The illumination sensor 56 and its driver 57, the acceleration sensor 58, its driver 59, etc. are provided.

The display unit 31 includes the display screen 31a described above, and causes the display screen 31a to perform various displays including time. The display unit 31 switches display / non-display of each segment and pixel of the display screen 31a according to the drive signal input from the display driver 32 based on the control signal from the CPU 41. The display screen 31a may be displayed in other display methods such as organic EL (
Electro-Luminescent) display may be used, and the display driver 32 is provided according to the display method of the display screen 31a.

The radio wave receiver 34 receives an amplitude-modulated wave in a long wavelength band using the antenna 33. In other words, in the electronic timepiece 1 of the present embodiment, the radio wave receiver 34 receives standard radio waves from which time information is output and transmitted from around the world. Standard radio waves are mainly Japanese JJY (40 kHz, 60 kHz).
z), US WWVB (60 kHz), UK MSF (60 kHz), German DCF7
7 (77.5 kHz). The radio wave reception unit 34 can select a standard radio wave to be received based on the set city information, and can perform reception in synchronization with the selected frequency.
The antenna 33 and the radio wave receiver 34 constitute a receiver.

FIG. 3 is a diagram illustrating the shape of the antenna 33 used in the electronic timepiece 1 of the present embodiment. 3A is a plan view of the antenna 33, and FIG. 3B is a cross-sectional view taken along a cross-sectional line AA in FIG.
This antenna 33 is a bar antenna suitable for radio wave reception in a long wavelength band, and a conductive wire (winding wire) is wound around a central portion in the length direction of a long plate-like or rod-like core 33a to form a coil 33.
b is formed. Part or all of the side surfaces of the core 33a and the coil 33b are accommodated in the cover member 33d.

As the core 33a, a magnetic material that can be formed into a long plate shape or a rod shape and has a high magnetic permeability, for example, a ferrite core or an amorphous alloy can be used. The length of the core 33a is substantially equal to the length of the cover member 33d. Lead wires 33 are provided at both ends of the winding of the coil 33b.
c are connected to each other, and are pulled out in a direction perpendicular to the direction in which the antenna 33 extends. The coil 33b may be fixed to the core 33a or the cover member 33d using an insulating adhesive. The cover member 33d uses, for example, an insulating member such as various resins,
The core 33a and the coil 33b are fixed without affecting the reception sensitivity of the antenna 33,
Protect. The arrangement of the antenna 33 in the electronic timepiece 1 will be described in detail later.

The operation unit 35 detects input operations to the push button switches 35a to 35f, converts them into electrical signals, and outputs them to the CPU 41 as input signals. Alternatively, the operation unit 35 may include a configuration for detecting an input operation by other methods such as a crown or a touch panel sensor.

The power supply unit 36 supplies power to each unit of the electronic timepiece 1 including the CPU 41. The power supply unit 36 is small and can supply power stably for a long time, and is, for example, a rechargeable button battery.

The CPU 41 performs various arithmetic processes and controls the overall operation of the electronic timepiece 1. CPU4
1 is a ROM 4 that stores programs related to various functions in accordance with input signals input from the operation unit 35.
Read from 2 and execute.

The ROM 42 stores control programs, programs related to various functions, and initial setting data. These programs and initial setting data are read by the CPU 41 as necessary, and are developed on the RAM 43 and executed. The initial setting data includes a barometric altitude conversion table 42a for converting a measured value of barometric pressure into an altitude value.

The RAM 43 provides a working memory space to the CPU 41. The RAM 43 includes a measurement data history storage unit 43b that stores temporary data such as history data of measurement values measured by the pressure sensor 50, the magnetic field sensor 52, and the temperature sensor 54, and ON / OFF setting of alarm function and alarm setting time information. Is provided with an alarm setting storage unit 43a.
The CPU 41, ROM 42, and RAM 43 constitute a control unit, a decoding unit, and a time correction unit. The CPU 41, ROM 42 and RAM 43 are a control chip 62 which will be described later.
It can be set as the structure formed collectively (refer FIG. 4).

The oscillation circuit 44 generates and outputs a signal having a predetermined frequency. The oscillation circuit 44 is, for example, a crystal oscillation circuit.
The frequency dividing circuit 45 divides the signal having a predetermined frequency input from the oscillation circuit 44 into a signal having a frequency used by the CPU 41 and the time measuring circuit 46 and outputs the signal.
The time counting circuit 46 counts the number of signals input from the frequency dividing circuit 45 and counts the current time by adding to the initial set time. The current time counted by the timer circuit 46 is the CPU 4
1 and displayed on the display unit 31. Further, based on a command from the CPU 41, the current time counted by the time counting circuit 46 can be overwritten and corrected.

The notification unit 37 includes a configuration for performing various notification operations for the user of the electronic timepiece 1.
In the electronic timepiece 1, the notification unit 37 includes an EL element 37a, a PZT 37b (piezo element), and a vibration motor 37c. The EL element 37a includes a display screen 31a in the display unit 31.
Is a flat element provided at the bottom of the display screen 3 and emits light when a predetermined voltage is applied to the display screen 3.
It is the backlight which illuminates the whole surface of 1a. The PZT 37b generates a buzzer sound when a voltage is applied. Moreover, the vibration motor 37c notifies the user wearing the electronic timepiece 1 by generating vibration by the operation of the motor.
The configuration for performing the notification operation is not limited to the above. For example, an LED (Light Emitting Diode) or miniature bulb may be provided as another configuration for performing illumination, or a small speaker may be provided as another configuration for performing voice transmission.

The pressure sensor 50 is a small sensor that measures atmospheric pressure. As this pressure sensor 50,
For example, a semiconductor sensor using a piezo element is used. The driver 51 is connected to the pressure sensor 5
A predetermined voltage is applied to 0 to obtain an output voltage, which is output to the CPU 41.

The magnetic field sensor 52 is a small sensor that measures a geomagnetic field. As the magnetic field sensor 52, for example, a sensor using a magnetoresistive element can be used. The driver 53 applies a predetermined voltage to a pair of magnetic field sensors 52 for measuring magnetic fields in orthogonal directions, amplifies the output voltage, and outputs the amplified voltage to the CPU 41.

The temperature sensor 54 is a sensor that measures temperature. Here, the temperature sensor 54 is CP.
The IC circuit is arranged inside the control chip 62 (see FIG. 4) together with the U41, the ROM 42, and the RAM 43. The temperature sensor 54 is in a position where it can come into contact with the outside air through the hole so that the temperature outside the electronic timepiece 1 can be measured as much as possible. It is desirable to be provided at a position that is not affected by the body temperature transmitted from the user's arm through the CPU 41. However, the CPU 41 calculates the temperature by performing correction for removing these effects on the acquired measurement value. It is also good. The driver 55 includes a temperature sensor 54
Is supplied with a predetermined voltage and outputs an output voltage to the CPU 41.

The illuminance sensor 56 is a sensor that measures the amount of light incident on a predetermined portion of the display screen 31a. As the illuminance sensor 56, for example, a photodiode or a photo IC can be used. The driver 57 operates by applying a predetermined voltage to the illuminance sensor 56 and detects whether or not the amount of incident light is below a predetermined threshold level using, for example, a comparator, and detects the detection signal to the CPU 41. Is output.

The acceleration sensor 58 is a sensor capable of detecting at least the acceleration in the display surface of the electronic timepiece 1 and the direction perpendicular to the display surface, including gravitational acceleration. As the acceleration sensor 58, for example, a sensor using PZT can be used. The driver 59 supplies predetermined power to the acceleration sensor 58, amplifies the output of the acceleration sensor 58, and outputs it to the CPU 41.

Next, the arrangement of the casing 2 in the electronic timepiece 1 will be described.
In the electronic timepiece 1 of the present embodiment, a drive control circuit is formed using a single four-layer substrate 6 in which four wiring layers (first to fourth layers) are stacked.

4 and 5 are views for explaining the four-layer substrate 6 arranged inside the casing 2. FIG. 4 is a view showing the first layer and the second layer of the four-layer substrate 6, respectively.
It is the figure which showed the 3rd layer and the 4th layer of the layer board | substrate 6, respectively.

As shown in FIG. 4A, the outer layer on the display unit 31 side in the four-layer substrate 6, that is, the first layer (first layer) serving as the surface is connected to each input terminal of the display unit 31. Connected liquid crystal connector 6
1a and 61b (connection part) are provided at both ends. The respective terminals (output terminals) of the liquid crystal connectors 61a and 61b are respectively connected to the first terminals at positions between the liquid crystal connectors 61a and 61b via the liquid crystal wirings 63a and 63b (output wirings) provided in the first layer. It is connected to a control chip 62 mounted on the layer. Since the arrangement width of the liquid crystal wiring can be narrower than the arrangement width of each terminal, the entire width of the liquid crystal wiring 63a is also narrower than the width of the liquid crystal connectors 61a and 61b.

Here, the liquid crystal wirings 63a, 63b and other various wirings are provided in the first layer,
The parts on which the electronic components are mounted are grounded (the grounding area 64, a solid pattern) except for the wiring itself that is covered with insulation. On the other hand, on the outer sides of the ground region 64 related to the liquid crystal wiring 63a and the liquid crystal connector 61a, the non-wiring regions 65a, 6 are basically provided with no wiring.
5b is provided. These non-wiring regions 65a and 65b are covered and protected by an insulating film without being grounded.

FIG. 4B is a view when the second layer of the four-layer substrate 6 (inner layer provided on the display unit 31 side) is seen through from the first layer side. In the second layer, when the four-layer substrate 6 is viewed in plan, FIG.
A ground region 74 and non-wiring regions 75a and 75b are provided at positions corresponding to the ground region 64 and the non-wiring regions 65a and 65b in the first layer shown in a). Within the ground area 74, 4
The wiring which connects the opposite side across the control chip 62 and other electronic components provided on the first layer side of the layer substrate 6 is slightly provided, but includes a large area including the area between the non-wiring areas 75a and 75b. The part is grounded.

The third layer is an inner layer that is disposed substantially in parallel with the second layer on the opposite side of the first layer at a predetermined distance. FIG. 5A shows a plan view when the third layer is seen through from the first layer side. The third layer corresponds to the ground regions 64 and 74 and the non-wiring regions 65a, 65b, 75a, and 75b provided in the first layer and the second layer, respectively, when the four-layer substrate 6 is viewed in plan. The grounding region 84 and the non-wiring regions 85a and 85b are provided at the positions where they are located. The grounding region 84 is provided with a wiring that connects a part (for example, various sensors) that requires a coherent space or is separated from other electronic parts on the first layer (outer layer). .
In the electronic timepiece 1 of the present embodiment, due to the arrangement of the push button switch 35a, the input signal transmission wiring related to the operation of the push button switch 35a is slightly provided in the non-wiring area 85a.

FIG. 5B is a plan view of the fourth layer (second layer), which is the outer layer on the back cover side, when viewed from the back cover side. In the fourth layer, when the four-layer substrate 6 is viewed in plan, the grounding region 94 (shielding region) and the non-wiring region 95a are located at positions corresponding to the grounding region 84 and the non-wiring regions 85a and 85b.
, 95b are provided. In the grounding region 94, electronic components connected by the wiring provided in the third layer and some wirings are provided at positions separated from the antenna 33, but are sandwiched between the non-wiring regions 95a and 95b. Most of the area including the area is grounded.

In the fourth layer, both ends of the antenna 33 are fixed to the non-wiring regions 95a and 95b (both end region). That is, the antenna 33 has a non-wiring area 95 a in the ground area 94.
, 95b, and is attached to the fourth layer so as to straddle the portion corresponding to the position of the liquid crystal wiring 63a. The lead wire 33c of the antenna 33 is wired (signal line) in the ground areas 84 and 94.
To receive the radio wave signal to the radio wave receiver 34.

Thus, both ends of the antenna 33 (core 33a) are provided in the non-wiring regions 95a and 95b, and the grounding regions 74 and 94 are provided between the central portion of the antenna 33 and the wirings of the first to third layers.
An advantage of the arrangement in which the gap is sandwiched will be described.

In the antenna 33, a magnetic field line passing between both ends of the core 33a, that is, a change in magnetic flux passing through the coil 33b causes an induced current in the coil 33b to be acquired as a received radio wave signal. Therefore,
First, both ends of the core 33a are arranged by placing each of the first to fourth layers corresponding to the both end portions of the antenna 33 on the four-layer substrate 6 as a non-wiring portion, and without providing wiring or electronic components in principle. The portion is separated from the conductive member to prevent the magnetic flux change passing through the core 33a from being attenuated. Further, among magnetic field changes related to electromagnetic noise generated by electronic components and wiring on the four-layer substrate 6, in particular, changes in the extending direction of the antenna 33 are prevented from reaching both end portions of the antenna 33. .

On the other hand, most of the portions of the second layer and the fourth layer corresponding to the wiring and electronic components provided in the first layer and the third layer are grounded by the ground regions 74 and 94, respectively. It functions as a shielding region for preventing most of the noise radiated from the electronic component from reaching the antenna 33. Further, the shielding of the standard radio wave with respect to the central portion of the core 33a in the antenna 33 has less influence than the attenuation of the radio wave incident intensity to both ends of the core 33a, and does not significantly reduce the sensitivity.

Therefore, with the arrangement described above, it is possible to reduce the reception level of noise generated inside the electronic timepiece 1 while suppressing a decrease in the reception sensitivity of the standard radio wave as the whole antenna 33.

  6 and 7 show display examples of the display screen 31a of the electronic timepiece 1. FIG.

FIG. 6A shows a display example of the display screen 31a in the altitude display state. When the mode is switched to the altitude display state by pressing the push button switches 35e and 35f, the altitude value calculated based on the measured value of the pressure sensor 50 and the barometric altitude conversion table 42a is displayed in the middle of the display screen 31a up to 4 digits. Is displayed at the top of the one's place value unit (meters)
A display “m” is displayed. Further, the altitude display state is shifted to a predetermined time by pressing the push button switch 35c.

At this time, in the electronic timepiece 1 of the present embodiment, the altitude change history can be displayed in a graph on the upper stage of the display screen 31a, and the current time can be displayed on the lower stage.

FIG. 6B shows a display example of the display screen 31a in the atmospheric pressure and temperature display states. When the mode is switched to the atmospheric pressure and temperature display state by pressing the push button switches 35e and 35f, a maximum of 4 is displayed in the middle of the display screen 31a based on the measured value of the pressure sensor 50.
“HP” indicates the unit of measure (hectopascal) at the bottom of the one-digit value.
a "is displayed. In the lower part of the display screen 31a, based on the measurement value of the temperature sensor 54, a temperature display is performed with a maximum of "-" sign, two integer digits, decimal point ".", And one decimal digit. A display “° C.” indicating a display unit (in this case, Celsius) is displayed on the right side of the decimal digit.

At this time, the history of atmospheric pressure change can be displayed in a graph on the upper stage of the display screen 31a.

  FIG. 7 is another display example of the display screen 31 a of the electronic timepiece 1.

In this display example, only the pressure change history is displayed on the upper stage while the time is displayed on the middle and lower stages of the display screen 31a.
In this way, by adopting the above-described antenna arrangement, the display screen 31a can be made larger than the plane size of the electronic timepiece 1, and the number of display pixels and the number of segments can be increased to flexibly display a plurality of displays. It can be combined and performed simultaneously.

As described above, the electronic timepiece 1 of this embodiment includes the display unit 31 that performs digital display, the single four-layer substrate 6 in which four wiring layers are stacked in the thickness direction, and the four-layer substrate 6. Liquid crystal connectors 61a and 61b provided with a plurality of terminals attached and arranged on the first layer and connected to the display unit 31, the antenna 33 and the radio wave receiving unit 34. And liquid crystal wirings 63a and 63b for connecting each of the plurality of terminals of the liquid crystal connectors 61a and 61b and the control chip 62 in the first layer. When the four-layer substrate 6 is viewed in plan, the antenna 33 is attached to a position between positions corresponding to the control chip 62 and the liquid crystal connector 61a in the fourth layer, which is the outer layer opposite to the first layer. ing. Further, in the first layer, the liquid crystal wiring 63 a is provided so as to pass between both ends of the position corresponding to the antenna 33. In the fourth layer, most of the area between both ends of the antenna 33 is a ground region 94.
It has become. Therefore, the width of the liquid crystal connectors 61a and 61b can be increased while suppressing noise received by the antenna 33 from the wiring on the four-layer substrate 6 and electronic components. A display screen 31a that is wider and more accurate than the size can be provided.

Further, when the four-layer substrate 6 is viewed in plan, predetermined ranges including portions corresponding to both end portions of the antenna 33 in the first to fourth layers are defined as the non-wiring regions 65a, 65b, 75a, 7
By setting 5b, 85a, 85b, 95a, and 95b, it is possible to separate the conductive member from both ends that greatly affect the reception sensitivity of the antenna 33, and to suppress a decrease in reception sensitivity.

In addition, since the antenna 33 is disposed at a position away from the annular casing 2 that is a conductive material, it is possible to suppress a decrease in reception sensitivity due to the casing 2 as well as wiring and electronic components.

Further, by using the four-layer substrate 6 and attaching the antenna 33 to the fourth layer that is not adjacent to the first layer on which the control chip 62 and the liquid crystal wirings 63a and 63b are provided, the antenna is made larger from these electronic components and wirings. 33 can be separated, and the ground region 74 provided in the second layer and the ground region 94 provided in the fourth layer more effectively suppress the reception of noise from these electronic components and wiring. I can do it. Also, when a large number of sensors such as the magnetic field sensor 52 are provided, the control chip, the wiring, the sensor, and the antenna 33 can be spaced apart from each other.

Further, the ground regions 74 and 94 cause noise from the electronic components and wiring of the first layer to be generated in the antenna 33.
Therefore, the configuration is easy and the balance with sensitivity reduction can be set appropriately.

In addition, since the antenna 33 and the liquid crystal wiring 63a are provided so as to be orthogonal to each other in plan view, a large number of liquid crystal wirings 63a can be efficiently provided within a limited width, and the liquid crystal wiring 63a is generated. The parallel component of the noise antenna 33 can be effectively suppressed.

In addition, the electronic timepiece 1 can decode and acquire time information from the standard radio wave received by the radio wave receiver 34, and can correct the time of the time measuring circuit 46 based on the acquired time information. By applying the arrangement of each component and wiring using the above-described four-layer substrate 6, it is possible to obtain a radio timepiece that can acquire time information satisfactorily and can have a large and highly accurate display screen. I can do it.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above embodiment, the liquid crystal connector 61a is formed on the first layer using the four-layer substrate 6.
61b, a control chip 62, and liquid crystal wirings 63a and 63b for connecting them are provided.
Although the configuration in which the antenna 33 is provided in the layer has been described as an example, a structure in which a total of four wiring layers are formed by using two double-sided boards may be used.

Further, the present invention can be similarly applied even in the case of a two-layer structure using a single double-sided substrate. That is, a configuration in which the liquid crystal connectors 61a and 61b, the control chip 62, and the liquid crystal wirings 63a and 63b for connecting them are provided on the surface of one substrate and the antenna 33 is provided on the back surface is also related to the present invention. An effect can be obtained.
On the other hand, even when a multilayer substrate other than four layers, three or more double-sided substrates or single-sided substrates, or a combination of two or more of multilayer substrates, double-sided substrates, and single-sided substrates are used. In the case of a multilayer substrate, for example, in the case of a multilayer substrate, the antenna 33 is attached and arranged on the outer layer where the control chip 62 is not attached. It is possible to effectively suppress reception of noise from electronic components such as the chip 62 and the liquid crystal wirings 63a and 63b as well as wirings provided in other layers. Further, the control chip 62 has a structure in which the control chip 62 is embedded in the multilayer substrate and attached to the wiring layer in accordance with various conditions such as the arrangement relationship with other electronic components and wiring as long as the shielding region is disposed between the control chip 62 and the antenna 33. There may be.

In the above embodiment, the case where the antenna 33 is shorter than the liquid crystal connectors 61a and 61b has been described. However, when the annular casing 2 is used, the liquid crystal connectors 61a and 61b are arranged by arranging the antenna 33 closer to the center. Not only can the antenna 33 be lengthened at the same time. Thereby, the sensitivity of the antenna 33 can be further improved.

Further, the shape of the non-wiring regions 65a and 65b is not limited to the shape of the above embodiment. For example, it can be appropriately changed according to the arrangement of push button switches, various sensors, and wirings connected thereto.

In the above embodiment, the ground regions 74 and 94 are used for magnetic shielding against internal noise. However, other magnetic shielding members may be used as long as the reception sensitivity of the antenna 33 is not greatly deteriorated.

In the above embodiment, the configuration in the case of receiving a standard radio wave in a wristwatch-type electronic timepiece having a digital display screen has been described, but the present invention is not limited to this embodiment. For example,
You may use for small portable watches other than a wristwatch. Further, the present technology may be applied to electronic devices other than watches, such as a receiver that receives a long wave beacon and a radio receiver that receives a medium wave broadcast wave with a bar antenna.

In addition, the specific details shown in the above embodiment, such as the shape of the four-layer substrate 6, the casing 2, and the display screen 31a, can be changed as appropriate without departing from the spirit of the present invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below.
The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A display for digital display;
A substrate on which a plurality of wiring layers are laminated in a single sheet or a plurality of sheets arranged in the thickness direction;
A control unit that is mounted and disposed on a first layer of the plurality of wiring layers and controls display in the display unit;
A connection portion provided in the first layer and arranged with a plurality of output terminals connected to the display portion;
A receiver having a bar antenna and receiving radio waves;
An output wiring provided in the first layer and connecting each of the plurality of output terminals and the control unit;
When the substrate is viewed in plan, the bar antenna is a wiring layer at either end of the plurality of wiring layers, and the first layer side in a second layer different from the first layer; Is mounted and arranged at a position between the positions corresponding to the positions of the one connection section and the control section on the opposite surface, and the output wiring connected to the output terminal according to the one connection section is The first layer is provided so as to pass between regions corresponding to both end regions including both ends of the bar antenna,
In the second layer, the region between the both end region is a shielding region provided with a magnetic shielding unit.
<Claim 2>
When the substrate is viewed in plan, a non-wiring area in which no wiring is provided is provided in a predetermined portion including areas corresponding to the both end areas in all wiring layers. The electronic device according to claim 1.
<Claim 3>
The substrate has three or more wiring layers,
When the substrate is viewed in plan, a magnetic shielding portion is provided in a region corresponding to the shielding region in at least one of the wiring layers between the first layer and the second layer. The electronic device according to claim 1, wherein the electronic device is provided.
<Claim 4>
The electronic device according to claim 1, wherein the shielding region is a grounded region.
<Claim 5>
The said bar antenna is attached to said 2nd layer so that said output wiring may be orthogonally crossed when the said board | substrate is planarly viewed, The Claim 1 characterized by the above-mentioned. Electronics.
<Claim 6>
It has a timer that counts the current time,
The radio wave received by the receiving unit is a radio wave including time information,
The controller is
A decoding unit for obtaining time information from the received radio wave;
A time correction unit for correcting the current time of the timekeeping unit based on the time information decoded by the decoding unit,
The electronic device according to any one of claims 1 to 5, wherein the current time is continuously displayed on the display unit.

DESCRIPTION OF SYMBOLS 1 Electronic timepiece 2 Casing 3 Bezel 6 Board | substrate 31 Display part 31a Display screen 32 Display driver 33 Antenna 33a Core 33b Coil 33c Lead wire 33d Cover member 34 Radio wave reception part 35 Operation part 35a-35f Pushbutton switch 36 Power supply part 37 Notification part 37a EL element 37b PZT
37c Vibration motor 41 CPU
42 ROM
42a Pressure altitude conversion table 43 RAM
43a Alarm setting storage unit 43b Measurement data history storage unit 44 Oscillation circuit 45 Frequency dividing circuit 46 Timekeeping circuit 50 Pressure sensor 51 Driver 52 Magnetic field sensor 53 Driver 54 Temperature sensor 55 Driver 56 Illuminance sensor 57 Driver 58 Acceleration sensor 59 Drivers 61a, 61b Liquid crystal Connector 62 Control chip 63a, 63b Liquid crystal wiring 64 Ground area 65a, 65b Non-wiring area 74 Ground area 75a, 75b Non-wiring area 84 Ground area 85a, 85b Non-wiring area 94 Grounding area 95a, 95b Non-wiring area

Claims (6)

A display for digital display;
A substrate on which a plurality of wiring layers are laminated in a single sheet or a plurality of sheets arranged in the thickness direction;
A control unit that is mounted and disposed on a first layer of the plurality of wiring layers and controls display in the display unit;
A connection portion provided in the first layer and arranged with a plurality of output terminals connected to the display portion;
A receiver having a bar antenna and receiving radio waves;
An output wiring provided in the first layer and connecting each of the plurality of output terminals and the control unit;
When the substrate is viewed in plan, the bar antenna is a wiring layer at either end of the plurality of wiring layers, and the first layer side in a second layer different from the first layer; Is mounted and arranged at a position between the positions corresponding to the positions of the one connection section and the control section on the opposite surface, and the output wiring connected to the output terminal according to the one connection section is The first layer is provided so as to pass between regions corresponding to both end regions including both ends of the bar antenna,
In the second layer, the region between the both end region is a shielding region provided with a magnetic shielding unit. When the substrate is viewed in plan, a non-wiring area in which no wiring is provided is provided in a predetermined portion including areas corresponding to the both end areas in all wiring layers. The electronic device according to claim 1. The substrate has three or more wiring layers,
When the substrate is viewed in plan, a magnetic shielding portion is provided in a region corresponding to the shielding region in at least one of the wiring layers between the first layer and the second layer. The electronic device according to claim 1, wherein the electronic device is provided. The electronic device according to claim 1, wherein the shielding region is a grounded region. The said bar antenna is attached to said 2nd layer so that said output wiring may be orthogonally crossed when the said board | substrate is planarly viewed, The Claim 1 characterized by the above-mentioned. Electronics. It has a timer that counts the current time,
The radio wave received by the receiving unit is a radio wave including time information,
The controller is
A decoding unit for obtaining time information from the received radio wave;
A time correction unit for correcting the current time of the timekeeping unit based on the time information decoded by the decoding unit,
The electronic device according to any one of claims 1 to 5, wherein the current time is continuously displayed on the display unit.

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