JPH08213818A - Radio terminal equipment - Google Patents

Abstract

PURPOSE: To provide a radio terminal equipment in which an antenna pattern receiving a frequency signal sent from an electromagnetic pen and an antenna pattern receiving a signal whose frequency differs from that of the signal sent from the electromagnetic pen are arranged on a same plane. CONSTITUTION: An antenna pattern 2 in the X axis direction is arranged to a front side of a sensor board 1 and an antenna pattern 9 in the Y axis direction is arranged to a rear side, and the antenna patterns 2, 9 in the X and Y axis directions receive a radio wave sent from an electromagnetic pen to detect a coordinate on the sensor board 1 pointed out by the pen. Furthermore, antenna patterns 4, 5 for radio communication are arranged to a pattern gap of the antenna pattern 2 in the X axis direction to make transmission/reception of a radio wave by using the frequency different from the frequency of a radio wave emitted from the pen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless terminal device having a digitizer function for detecting radio waves emitted from an electromagnetic induction pen.

[0002]

2. Description of the Related Art FIG. 10 is a diagram showing the layout and shape of antennas in a conventional portable radio apparatus. Here, in consideration of the reception environment, the external type is shown as shown in the figure. The antenna can be retracted or rotated for storage when it is carried or not in use.

The antenna 59 of the portable radio equipment 58 shown in FIG. 10 (A) is of a type protruding from the rear surface of the equipment 58, and the antenna 68 of the portable radio equipment 67 of FIG. 10 (B) is equipment. It comes out from the side of 67. Furthermore, FIG.
The portable wireless device 60 of (C) is compatible with diversity reception, and as shown in the drawing, an external reception-only antenna 62,
Two transmitting / receiving antennas 61 are provided.

Further, even in a device having a built-in antenna, the antenna is generally housed inside the case of the device and is not provided below the display section.

[0005]

For this reason, in the above-mentioned conventional example, the antenna must be expanded or rotated so as to stand upright every time wireless communication is performed, and when the antenna is housed, it is reversed. It is very inconvenient because it requires operation. Furthermore, in the case of diversity reception that improves reception performance, two antennas are provided. Therefore, when changing a portable non-wireless device to a wireless device, the strength of mounting the antenna and the mounting interval of the antennas. However, there was a problem in that the design of the entire device including the redesign of the case was required during development, which was a heavy burden.

In addition, in the position of the conventional built-in antenna,
It is not possible to apply conductive coating inside the case, which can be expected to have a considerable effect on EMI countermeasures. This is because if such conductive coating is applied, the radio waves reaching the antenna inside the case will be significantly attenuated. Similarly, human hands are also a great enemy of radio waves, and there is a risk that a communication error will occur if, for example, the antenna is touched during communication.

The present invention has been made in view of the above conventional example, and a pattern for receiving a frequency signal of a signal emitted from an electromagnetic pen and an antenna pattern for receiving a signal of a frequency different from the frequency of the signal. It is an object of the present invention to provide a wireless terminal device in which the above are arranged on the same plane.

Another object of the present invention is to provide a wireless terminal device in which an antenna pattern for detecting radio waves emitted from a pen and an antenna pattern for wireless communication are arranged on the same substrate. .

Another object of the present invention is to mount an antenna by providing an antenna pattern for receiving radio waves from a pen and an antenna pattern for wireless communication on a built-in substrate. An object of the present invention is to provide a wireless terminal device that does not require man-hours or an external antenna member.

[0010]

In order to achieve the above object, the wireless terminal device of the present invention has the following configuration.
That is, a wireless terminal device having a digitizer function for receiving an electromagnetic wave emitted from an electromagnetic induction type pen to detect a coordinate position designated by the pen, and a plurality of first terminal units receiving a radio wave emitted from the pen. A second antenna for transmitting and receiving a signal of a frequency different from the radio wave from the pen in the gap between the antenna pattern of one and the plurality of antenna patterns;
Antenna pattern.

[0011]

In the above structure, a plurality of first antennas
According to the pattern, the electric wave emitted from the electromagnetic pen is received, and the coordinate position designated by the pen is detected. The second antenna pattern arranged in the gap between the plurality of antenna patterns transmits and receives using a signal of a frequency different from the radio wave from the pen.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[First Embodiment] FIG. 1 is an external view of a portable wireless terminal device having a digitizer function according to this embodiment.

Reference numeral 10 indicates a coordinate designating pen, and 13 designates a digitizer input surface on which glass or the like is arranged. By designating a coordinate position on the input surface using the pen 10, the digitizer is designated. Coordinate information can be entered.
Reference numeral 12 indicates a case of the device.

FIG. 2 is a diagram showing the shape of the sensor board 1 of a pen-input type portable wireless terminal device (including a digitizer function) according to an embodiment of the present invention. FIG. FIG. 2B is a view showing the front surface, and FIG. 2B is a view showing the back surface of the sensor board 1. The wireless terminal device receives the radio wave transmitted from the coordinate input pen 10 by the antenna of the sensor board 1 and detects the coordinate on the sensor board 1 designated by the pen 10.

In FIG. 2A, 1 is a sensor board, which is an antenna for receiving radio waves emitted from the pen 10.
The pattern is arranged. 2 is an antenna in the X-axis direction
The pattern is shown and is provided on the front surface side of the sensor board 1. An interface unit 3 connects the sensor board 1 to other electric circuits. Reference numeral 4 denotes a local weak radio antenna, 5 is a wide area radio antenna, 6 is an output signal from the wide area radio antenna 5, and 7 is an output signal from the local weak radio antenna 4. Reference numeral 8 denotes the back surface of the sensor board 1, and is provided with a pattern of an antenna 9 in the Y-axis direction that receives a radio wave emitted from the pen 10.

As shown in FIG. 2, the surface of the sensor board 1 has an X for receiving radio waves emitted from the pen 10.
The axis antenna 2 and the Y-axis antenna 9 are provided on the back surface 8 of the sensor board 1. The distance between the patterns in each of the X-axis and Y-axis antenna patterns is the same as that of the wireless type of the present embodiment. It is not arranged corresponding to the resolution of the digitizer, but is provided with a long interval to some extent. Then, based on the signal strengths received by these antenna patterns, the coordinate position on the sensor board 1 designated by the pen 10 is detected, and the accuracy corresponding to the resolution of the digitizer is obtained. The distance between these antenna patterns varies depending on the position detecting method of the pen 10, but is usually 3 to 5 mm.

In the present embodiment, the local weak radio antenna 4 and the wide-area radio antenna 5 for transmitting / receiving another frequency between the antenna patterns in the X-axis or Y-axis direction.
And are provided. As a result, even during coordinate input by the pen 10, wireless transmission / reception can be performed with another wireless device that communicates using a frequency different from the frequency of the signal emitted from the pen 10.

Further, as described above, the wireless digitizer of this embodiment has two built-in wireless functions, that is, two functions, namely, a weak local area wireless communication and a wide area wireless communication. By setting the signals for weak wireless communication and wide area wireless communication to be signals in different frequency bands, even if each wireless antenna is provided on the same sensor board 1, they can be used without mutual interference. This allows
There is no need to provide an external antenna for each wireless function as in the conventional case.

FIG. 3 is a view showing the sectional structure of a pen-input type portable wireless terminal device of this embodiment.

In FIG. 3, 10 is a digitizer dedicated pen, 11 is a radio wave emitted from the pen 10, and 12 is a case of an electromagnetic induction pen input type portable wireless terminal device. 1
A transparent glass 3 protects the liquid crystal (display) surface. 1
4 is a display unit (for example, LCD), 15 is a backlight,
It is used to make the contents displayed on the display unit 14 easy to see when the surrounding environment where the device is used is dark.
Reference numeral 1 is a sensor board that receives radio waves emitted from the pen 10, 17 is a main board of an electromagnetic induction pen input type portable wireless terminal device, and 18 is a case 12 provided as an EMI countermeasure.
The inner part of the painted part is shown. Reference numeral 19 is a relay station for wide area wireless, 20 is an antenna of the relay station 19, and 21 is a radio wave emitted from the relay station 19 for wide area wireless. 65
Is a shield plate attached to the back surface of the sensor board 1 for the purpose of noise shielding, and 66 is high-frequency noise emitted from the main board 17.

As described above, in the electromagnetic induction pen input type portable wireless terminal device of this embodiment, the transparent glass 13 and the display portion 14 are provided from the upper part of the device, and the sensor board 1 is provided under the transparent glass 13.
Is arranged. The main board 17 and the case 12 are provided below the sensor board 1.

Here, the electric wave 11 emitted from the pen 10
Reaches the sensor board 1 through the transparent glass 13 and the display unit 14. However, it does not pass below the sensor board 1 due to the action of the shield plate 65. On the contrary, the high frequency noise 66 emitted from the main board 17 is also shielded by the shield plate 65, and therefore does not reach the antenna pattern on the sensor board 1. That is, the shield plate 65 separates the digitizer portion from the electric circuit portion including the main board 17. As a result, the wireless communication antennas 4 and 5 provided on the sensor board 1 do not pick up noise emitted from the main board 17,
Also, when performing wireless transmission using the antennas 4 and 5,
Since harmful electromagnetic noise that causes a malfunction to the main board 17 is not given to the main board 17, stable circuit operation is performed.

Regarding voluntary control of harmful electromagnetic waves, there are VCCI in Japan and FCC in the United States, but as a noise countermeasure in device development, the inside of the main body case 12 is coated with a conductive coating 18
A method is often used in which the electromagnetic waves generated inside are prevented from being emitted to the outside. In this embodiment, as shown in FIG. 3, since the antenna is formed by the surface on which the conductive coating 18 is not applied, such noise countermeasures can be taken without any problem.

FIG. 4 is a block diagram showing a part of the internal structure of the pen input type portable wireless terminal device of the first embodiment of the present invention.

In FIG. 4, reference numeral 22 denotes a digitizer section, which processes signals from the X-axis antenna 2 and the Y-axis antenna 9 of the sensor board 1 to detect the coordinate position on the sensor board 1 designated by the pen 10. ing. Reference numeral 23 denotes an interface unit that connects the digitizer unit 22 and other electric circuits, 2
A wide area wireless unit 4 processes a signal 6 obtained from a wide area wireless antenna 5. Reference numeral 25 is an interface unit that connects the wide area wireless unit 24 and other electric circuits, 26 is a local weak wireless unit that processes the signal 7 obtained from the local weak wireless antenna 4, and 27 is the local weak wireless unit 26 and the like. It is an interface part that connects with the electric circuit of.

Thus, on the surface of the sensor board 1, the antenna 2 used for the digitizer function, the local weak radio antenna 4 and the wide area radio antenna which are the radio communication antennas provided in this embodiment are provided. 5 and 5 are arranged. A digitizer unit 22, a wide-area radio unit 24, and a local weak radio unit 26, which are processing circuits, are provided for each input / output of these antennas, and these are connected to other electric circuits to receive signals from the pen 10. The detection of the instructed coordinate position based on the above, and the wireless transmission / reception of data are performed.

[Second Embodiment] FIG. 5 is a block diagram showing a part of the internal structure of a pen-input type portable wireless terminal device according to a second embodiment of the present invention. In FIG. 5, reference numeral 28 denotes a wireless antenna, which is used when wirelessly communicating with another communication device. Reference numeral 29 is an interface unit that connects the wireless unit 30 and another electric circuit. Reference numeral 30 is a wireless unit that processes the signal 6 obtained from the wireless antenna 29.

In the second embodiment, two types of wireless circuits are mounted in the first embodiment, whereas the second embodiment is mounted.
In the embodiment, only one radio circuit is mounted.

In general, providing a plurality of types of wireless circuits in the same device is problematic in terms of the Radio Law. Therefore, as shown in the second embodiment, it is considered to be feasible only when the weak radio applicable to the Radio Law is used. Therefore, this second embodiment shows a case of higher feasibility.

[Third Embodiment] FIG. 6 is a block diagram showing a part of the internal structure of a portable radio terminal device according to a third embodiment of the present invention. The parts common to those in the above drawings are designated by the same reference numerals. The description of rz is omitted.

In FIG. 6, reference numeral 31 is a reception-only antenna that receives radio waves from other communication equipment, 32 is a reception signal obtained from the reception-only antenna 31, and 33 is radio waves from other communication equipment or emits radio waves. Or the like, 34 is a reception signal obtained from the transmission / reception antenna 33, 35 is an antenna spacing indicating the physical distance d between the antennas 31 and 33, and 36 is obtained from the reception-only antenna 31 and the transmission / reception antenna 33. Received signal 32 and received signal 34
It is a reception changeover switch for selecting any of the above. Three
7 is an antenna switching signal, which is output from the radio unit 39,
The switching of the reception changeover switch 36 is controlled. Reference numeral 38 is a reception signal selected by the reception changeover switch 36, 39 is a diversity radio unit having a diversity reception function, and 40 is the diversity radio unit 39.
It is a diversity wireless (I / F) unit that is an interface that connects the power supply with other electric circuits.

In the third embodiment, an antenna capable of performing diversity reception is provided assuming a bad radio wave condition. Then, as shown in FIG. 5, since the antenna spacing d that can be adapted to the wavelength of the wireless signal to be used can be set so as not to overlap the spacing of the originally provided digitizer antenna pattern 2, an ideal antenna The interval d can be set.

On the other hand, considering the case of the external antenna, it is possible to cope with the change of the radio frequency used to some extent, but every time the interval is subtly changed, the case or the
Other changes are needed. Further, when the antenna is built in, it becomes very difficult to set the ideal antenna distance d.

On the other hand, according to the diversity reception of the third embodiment, the antenna 31 is dedicated for reception, the antenna 33 is used for both transmission and reception, and switching is performed by the selection signal 37 so as to obtain a reception signal from the antenna having a high gain during reception. By switching the switch 36, communication can be performed using a radio signal having a higher gain.

[Fourth Embodiment] FIG. 7 is a block diagram showing a part of the internal structure of a portable wireless terminal device according to a fourth embodiment of the present invention. The same parts as those in the above drawings are designated by the same reference numerals. ,
The description of rz is omitted.

In FIG. 7, reference numeral 41 is a reception-only antenna that receives a radio wave emitted from another communication device, 42 is a reception signal obtained from the reception-only antenna 41, 43 is a transmission-only antenna that emits a radio wave to another communication device, 44 is a transmitter 4
5 is a transmission signal output from Reference numeral 45 denotes a wireless transmission unit, which modulates and outputs a transmission signal supplied to the transmission antenna 41. Reference numeral 46 denotes a wireless reception unit that demodulates the reception signal 42 obtained from the reception-only antenna 41.
47 is a control unit that receives radio waves from other communication devices,
It emits radio waves to other devices and exchanges data with other electric circuits to control the operation of the entire device. Reference numeral 48 is an I / F for a wireless control unit, which is an interface unit connecting with other electric circuits.

FIG. 8 is a diagram for explaining the antenna lengths of the antennas 41 and 43 in the device of the fourth embodiment.

In FIG. 8, reference numeral 49 is a receive-only antenna 4
1 shows the antenna length (1r), and 50 shows the antenna length (1s) of the transmitting antenna 41.

In the fourth embodiment, a wireless terminal device having different transmission and reception wavelengths is shown. In this case, the sensor board 1 can be provided with an arbitrary number of antennas to a certain extent. Thus, two antennas for frequency signals having different wavelengths, that is, two antennas 41 and 43 having different antenna lengths are provided.

[Fifth Embodiment] FIG. 9 is a block diagram showing a part of the internal structure of a portable radio terminal device according to a fifth embodiment of the present invention. The same parts as those in the above drawings are designated by the same reference numerals. ,
The description thereof will be omitted.

In FIG. 9, 51 is an AM receiving antenna for receiving a radio signal having a relatively low frequency, and 52 is an A antenna.
The M reception signal is output from the AM reception antenna 51 and input to the demodulation unit 53. The demodulation unit 53 demodulates the AM reception signal 52 obtained from the AM reception antenna 51 into a voice signal and outputs an AM demodulation output 54. An amplifier (AMP) 55 drives the speaker 56 by amplifying the AM demodulated output 54 demodulated into an audio signal. The speaker 56 outputs an audible sound that is actually heard by the human ear. Reference numeral 57 indicates an audible sound generated from the speaker 56.

The fifth embodiment shows an example in which an antenna for a signal having a long wavelength, that is, an antenna having a long antenna length is provided, and here, an AM wave is taken as an example of a signal having a long wavelength.

As shown in FIG. 9, an antenna 51 for AM reception is provided avoiding the antenna pattern 2 for the original digitizer function. In this embodiment, the antenna 51 is provided.
Can be freely arranged as long as they do not overlap the original antenna pattern 2 and its own antenna, and thus can handle signals of various wavelengths.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. The present invention can also be applied to the case where it is achieved by supplying a program for implementing the present invention to a system or an apparatus.

As described above, according to this embodiment, the following effects can be obtained. (1) Since the antenna pattern for wireless communication is arranged in the vicinity of the pattern for digitizer function, it is not necessary to newly provide an antenna for wireless communication in the device. (2) Since the antenna is arranged on the existing digitizer substrate, man-hours and costs for newly mounting the antenna are unnecessary. (3) Because the antenna is formed by the wiring pattern.
Weight reduction can be achieved. (4) When the frequencies of the transmission / reception signals are different, an antenna having an optimum length can be used for transmission / reception. (5) The inside of the case can be conductively painted to prevent noise. (6) It is possible to form an antenna for a signal having a long wavelength such as AM. (7) By providing the shield plate between the antenna pattern and the main board of the device, the device will not malfunction even during wireless transmission and reception. (8) A plurality of types of antennas can be easily provided. (9) Since the antenna can be built-in, there is no protrusion and there is no moving part, so there is no fear of breakage as compared with the case where the antenna is provided outside. (10) It is possible to deal with the case where it is necessary to separate the two antennas by a certain fixed distance such as diversity. (11) It is unlikely that the strength of the received radio wave is significantly attenuated by the user's hand or the like.

[0047]

As described above, according to the present invention, the pattern for receiving the frequency signal of the signal emitted from the electromagnetic pen and the antenna pattern for receiving the signal of the frequency different from the frequency of the signal are provided. A wireless terminal device arranged on the same plane can be provided.

Further, according to the present invention, it is possible to provide a wireless terminal device in which an antenna pattern for detecting a radio wave emitted from a pen and an antenna pattern for wireless communication are arranged on the same substrate.

Further, according to the present invention, by providing an antenna pattern for receiving radio waves from a pen and an antenna pattern for wireless communication on the built-in substrate, the number of steps for mounting the antenna and This has the effect of eliminating the need for an external antenna member or the like.

[0050]

[Brief description of drawings]

FIG. 1 is an external perspective view of an electromagnetic induction pen input type portable wireless terminal device of the present embodiment.

FIG. 2 is an external view of a sensor board of the wireless terminal device according to the present embodiment.

FIG. 3 is a cross-sectional view showing the structure of the wireless terminal device of this embodiment.

FIG. 4 is a block diagram showing a configuration of an electromagnetic induction pen input type portable wireless terminal device according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of an electromagnetic induction pen input type portable wireless terminal device according to a second embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of an electromagnetic induction pen input type portable wireless terminal device according to a third embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of an electromagnetic induction pen input type portable wireless terminal device according to a fourth embodiment of the present invention.

FIG. 8 is a diagram showing an antenna length embedded on a sensor board according to a fourth embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of an electromagnetic induction pen input type portable wireless terminal device of a fifth embodiment of the present invention.

FIG. 10 is an external view of a conventional electromagnetic induction pen input type portable wireless terminal device.

[Explanation of symbols]

 1 Sensor Board 2 X-axis Antenna for Digitizer 3 Sensor Board I / F 4 Antenna for Weak Radio on Site 5 Wide-area Wireless Antenna 9 Y-axis Antenna for Digitizer 10 Pen for Digitizer 12 Case 13 Transparent Glass (Coordinate Input Surface) 14 Display Part (LCD) 17 Main board 18 Conductive coating for EMI measures 22 Digitizer part 24 Wide area radio part 26 Weak radio part on the premises 28 Radio antenna 30 Radio part 31 Receive only antenna 33 Transmit / receive antenna 36 Receive changeover switch 39 Radio part 41 Receive only antenna 43 antenna for exclusive use of transmission 45 wireless transmission unit 46 wireless reception unit 47 control unit 51 AM reception antenna 53 AM demodulation unit

Claims (10)

[Claims] 1. A wireless terminal device having a digitizer function of receiving an electromagnetic wave emitted from an electromagnetic induction type pen to detect a coordinate position designated by the pen, and receiving a radio wave emitted from the pen. A wireless terminal, comprising: a plurality of first antenna patterns; and a second antenna pattern for transmitting and receiving a signal of a frequency different from a radio wave from the pen in a gap between the plurality of antenna patterns. machine. 2. The wireless terminal device according to claim 1, wherein the second antenna pattern includes an antenna pattern for weak local radio or an antenna pattern for wide area radio. 3. The wireless terminal device according to claim 1, wherein the second antenna pattern includes an antenna for diversity reception. 4. The wireless terminal device according to claim 1, wherein the second antenna patterns are antenna patterns having different lengths according to a reception frequency. 5. The second antenna pattern is AM
The wireless terminal device according to claim 1, further comprising a receiving antenna pattern. 6. The first antenna pattern includes an X-axis direction pattern arranged on one surface of the substrate and a Y-axis direction pattern arranged on the other surface of the substrate. The wireless terminal device according to claim 1, wherein: 7. The wireless terminal according to claim 1, wherein an electromagnetic shield is provided between a substrate on which the first and second antenna patterns are arranged and a substrate on which a control circuit is mounted. machine. 8. A wireless terminal device having a digitizer function of receiving an electromagnetic wave emitted from an electromagnetic induction type pen and detecting a coordinate position indicated by the pen, which is instructed by the electromagnetic induction type pen. A coordinate input surface, a plurality of first antenna patterns provided below the coordinate input surface for detecting electromagnetic waves emitted from the pen, and arranged in a gap between the plurality of first antenna patterns. A sensor board having a second antenna pattern for wireless communication, a control board disposed below the sensor board, and a control board disposed between the sensor board and the control board. A wireless terminal device, comprising: an electromagnetic shield; and a case member that exposes at least the coordinate input surface to protect the wireless terminal device. 9. The first antenna pattern has a pattern in the X-axis direction arranged on one surface of the sensor board and a pattern in the Y-axis direction arranged on the other surface of the sensor board. The wireless terminal device according to claim 8, comprising: 10. The second antenna pattern has at least two receiving antennas, and selects a signal from any one of the receiving antennas according to a received signal level. 9. The wireless terminal device according to claim 8, further comprising selection means for performing the selection.