JP2002204408A - Wireless network terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless network terminal the display section of which can simply be carried anywhere in a home for display and reproduction of a video signal and an audio signal and that is provided with an energy-saving means. SOLUTION: The wireless network terminal consists of a broadcast program reception recorder 200, of the display section 100 provided with a broadcast program reception communication means 500 that wirelessly communicates video, audio and data files, a reproduction output means 501 for video and audio signals, a battery 103 and a battery charging/display section feeding device 104, and of a stand section 300 provided with a power supply circuit 301 and a battery charging/display section feeding device 304. The display section 100 is attachable to/detachable from the stand section 300 and only when wireless connection with an in-home network cannot be established in the case that the display section 100 is removed from the stand section 300 and driven by the battery, the power of the display section 100 is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises means for displaying and reproducing video and audio signals connected to a wireless home network system for wirelessly transmitting contents (video, audio, data files) used at home. It concerns the terminal.

[0002]

2. Description of the Related Art At present, a liquid crystal TV is a TV using a CRT.
Although the portability is high compared to, but because it is not a wireless network, the power cable connection and
The signal input cable must be connected.

Some portable terminals have a communication function using a contact terminal. However, a cover or a shutter is provided to protect the contact terminal during non-communication. It takes time to mount / remove the camera and open / close the shutter.

In a device having a built-in power supply circuit, the power consumption of the device can be reduced to zero by turning off a main power switch of the main body. However, a general liquid crystal TV has no built-in power supply circuit. An AC adapter that connects to the outside is used. Even when not in use, power is consumed inside the AC adapter. You have to unplug it.

[0005] Further, in a general radio communication system, a communication channel is created by appropriately dividing a frequency band approved for use for each application in accordance with the amount of data to be handled. And if you use the same channel to communicate at the same time, interference will occur, data will be destroyed,
Since retransmission is necessary, the device that intends to communicate first detects an empty channel and starts communication before the device itself starts communication. Cannot be performed, power is wasted until the channel becomes empty.

[0006]

[0005] In the above-mentioned equipment, even if the size and the size of the equipment can be easily reduced to anywhere in the home, the communication /
In addition to the need for connecting and disconnecting power cables, it is necessary to pay attention to the presence and location of power outlets and signal cables to which the equipment is to be relocated, which is unsuitable for casual carrying and use. Further, it is difficult to reduce the power consumption of the device and the AC adapter to zero when not in use, without the user being conscious.

The present invention has been made to solve the above problems, and has a feature that a display unit can be easily carried anywhere in a home to display and reproduce a video signal and an audio signal. In addition, options such as peripheral equipment
It has expandability that can be used by connecting to a VC network. When the display unit is removed, the power consumption of the stand unit is automatically set to zero, and the display unit removed from the stand unit is connected to the home network wirelessly. It is an object of the present invention to realize a wireless network terminal provided with an energy saving means for turning off the power of a display unit when a connection cannot be established, thereby suppressing battery consumption.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a display unit having a built-in battery which operates only in a state of being wirelessly connected to a broadcast program receiving and recording device, and a power supply circuit. A wireless network terminal including a built-in stand unit, wherein the display unit includes a first charging and power supply device that charges the battery and supplies power to the entire display unit, and the stand unit includes the display unit. A second charging and power supply device that performs charging and power supply to the unit,
By attaching the display unit to the stand unit, the first and second charging and feeding devices come into contact with each other, and from the power supply circuit to the display unit via the first and second charging and feeding devices. Charging and power supply.

Further, in the present invention, in the wireless network terminal, the first and second charging / power-supplying devices are contacted via a connection terminal.

Further, according to the present invention, in the wireless network terminal, the display unit is mounted on the stand unit, and when the weight of the display unit is applied to the stand unit, the power of the entire stand unit is turned on, and the display unit is turned on. A power ON / OFF means for turning off the power of the entire stand unit by removing the unit from the stand unit so that the weight of the display unit is not applied to the stand unit.

Further, in the present invention, in the wireless network terminal, when the display unit cannot establish a wireless connection with the broadcast program receiving and recording device,
If the display unit is mounted on the stand unit, the power supply is continued without turning off the power, and only when the display unit is not mounted on the stand unit, the predetermined power is turned off. When the operation time is detected, a power switch on a supply line from the battery to the entire display unit is turned off to reduce battery consumption.

Further, according to the present invention, in the wireless network terminal, communication between the display unit and the stand unit can be performed at a speed higher than or equal to that of wireless communication between the broadcast program receiving and recording device and the display unit. This is performed using infrared communication means and does not cause the display unit to wait for transmission of data from the display unit to the stand unit, thereby reducing the memory capacity of the display unit that holds data waiting for transmission.

Further, according to the present invention, in the wireless network terminal, the stand unit has a hub function for connecting a digital AVC device which is usually used in a stand-alone mode, and the display unit is attached to the stand unit. In this state, the digital AVC device connected to the stand unit is connected to a home A including the broadcast program receiving and recording device.
It is provided with communication means for connecting to a VC network and transmitting and receiving data.

Further, according to the present invention, in the wireless network terminal, the stand has a function of connecting a personal computer main body, and a monitor signal from the personal computer main body is converted into a second video signal and a second video signal. A signal processing unit that converts the first video signal and the first audio signal wirelessly transmitted from the broadcast program receiving and recording device, or the second audio signal. An input selection switch unit for selecting one of a video signal and a second audio signal; and the first selection unit when the display unit is not mounted on the stand unit.
And the input selection switch section to select the second video signal and the second audio signal when the display section is mounted on the stand section. And an input selection control unit for controlling the

Further, according to the present invention, the display unit includes a forced selection switch unit for forcibly selecting the first video signal and the first audio signal, and when the forced selection switch unit is turned on. The input selection control unit may be configured to forcibly select the first video signal and the first audio signal regardless of whether the display unit is attached to the stand unit or not. This is to control the section.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of the entire system of a wireless network terminal according to the present invention. The wireless network terminal according to the present invention is broadly divided into devices such as a tuner, STB, PVR, VTR, etc. (hereinafter, referred to as “broadcast program reception and recording device”) 200 for receiving and recording a broadcast program, and wireless video. Wireless communication means 500 for communicating data, voice, and data files;
Video signal / audio signal reproduction / output means 501, battery 1
03, display unit 1 including first charging / power supply device 104
00, the power supply circuit 301 and the second charging / power-supplying device 30
4 comprising a stand 300. Display unit 100
Can be attached to and detached from a recess provided in the stand section 300.

FIG. 2 is an external view of the wireless network terminal according to the present invention in a state where the display unit is mounted on a stand unit. FIG. 2A is a front view, and FIG. 2B is a side view. With the display unit 100 attached to the stand unit 300, the contact terminal 1 (114) and the contact terminal 2 (312)
They are arranged in a positional relationship in contact with each other. Similarly,
The first high-speed infrared communication unit 105 and the second high-speed infrared communication unit 305 are arranged at positions facing each other. Further, the display unit detection switch 302 is installed at a position where the weight of the display unit 100 is applied in the recess provided in the stand unit 300. FIG. 3 is an external view of the wireless network terminal according to the present invention with the display unit removed from the stand unit. FIG. 3A is a front view, and FIG.
(B) is a side view.

The DC power generated by the power supply circuit 301 of the stand section 300 is supplied to the first charging / power supply device 104.
Contact terminal 1 (114) and second charging / power supply device 30
And a charging / power supply unit 502 configured to supply the battery 103 from the stand unit 300 to the display unit 100 by contact energization of the contact terminal 2 (312) to charge the battery 103 or to supply power to the entire display unit. ing.

Further, there is provided a means for turning on / off the power supply according to the state of attachment of the display unit 100 to the stand unit 300. The power ON / OFF means 503 includes a display unit detection switch 302, a power circuit control unit 303, a power switch 2
(311), and a display unit 100 to be detected.
Reference numeral 2 is provided on the inner surface of the concave portion that fits with the display unit 100 provided on the stand unit 300.

[0020] The wireless home network terminal according to the present invention operates only when the wireless connection with the home network cannot be established and when the display unit 100 is detached from the stand unit 300 and is driven by the battery.
In order to suppress the consumption of the battery 103 of the
0 means for turning off the power supply. Therefore, even when the wireless connection with the home network cannot be established, if the display unit 100 is mounted on the stand unit 300 and driven by the power supplied from the stand unit 300, the power supply of the display unit 100 The means for turning off does not work. Therefore, the power supply OFF unit 506 includes the antenna unit 111, the wireless communication unit 102, the wireless communication control unit 116 in the wireless communication unit, and the stand attachment detection unit 5.
07, a charging / power supply control unit 115 also serving as a power supply control unit,
A contact terminal 1 (114), a power supply circuit 107, a power switch 1 (117), a signal control unit 109 for controlling the operation of the display unit 100, a signal processing unit 110 for indicating a communication state to a user, and a display display 101. And an operation panel unit 106 operated by a user.

Further, in the wireless home network terminal according to the present invention, when the display unit 100 is mounted on the stand unit 300, the influence of disturbance light is small and the optical axis of optical communication can be easily adjusted. High-speed infrared communication units 105 and 305 are provided on the surfaces of the display sections facing the inner surfaces, respectively, and when the display section 100 is mounted on the stand section 300, the non-contact communication means 504 is realized between them. This high-speed infrared communication unit is a currently used infrared communication IrD.
High-speed communication can be realized by using a light-emitting element and a light-receiving element having a higher response speed than the A1.0 unit.
For example, when the transmission speed of the wireless communication function of the display unit 100 has a communication capability capable of transmitting signals of BS digital high-definition, the high-speed infrared communication unit has a communication capability of 24 Mbps or more at the effective transmission speed.

Further, the wireless home network terminal according to the present invention provides an AV
External interface 3 for connecting C device 410
07, using the signal processing unit 306 for converting the signal format, the wireless communication unit, and the non-contact communication unit, add the function expansion unit 505 via the stand unit 300 to the wireless network system to which the wireless network terminal belongs. It will be realized. While the device as the option 400 and the AVC device 410 are connected to the external interface 307 of the stand unit 300, the display unit 1
00 can be removed and easily carried anywhere in the home to display and reproduce video and audio signals.

Here, with reference to FIG. 1, the operation of each functional means provided in the wireless network terminal of the present invention will be described in order. (Wireless Communication Means) When requesting a video and audio signal to be transmitted to the display unit, the signal control unit 109 generates a command signal based on the signal input to the operation panel unit 106, and sends the command signal to the signal processing unit 110. Send out. Signal processing unit 110
Converts the received command signal into a format suitable for wireless communication means, and then sends it to the wireless communication unit 102. The wireless communication unit 102 detects a signal received by the antenna unit 111 as in a general wireless communication unit,
Check whether the frequency channel used for wireless communication is free. When the channel to be used is not vacant, the operation is performed in accordance with a display unit power OFF means described later. If the channel to be used is vacant, the command signal is modulated for wireless transmission, and then the antenna section 11
Send to 1. The command signal is converted from an electric signal into a radio signal by the antenna unit 111 and emitted to the air.

The command signal is converted into an electric signal by the antenna unit 202 of the broadcast program receiving and recording apparatus 200,
The broadcast program is transmitted to the wireless communication unit 201 included in the broadcast program receiving and recording apparatus 200. The command signal demodulated by the wireless communication unit 201 is transmitted to the broadcast program receiving and recording device 200. The broadcast program receiving and recording apparatus 200 that has received the command signal transmits the digital video / video data specified by the command signal.
The audio signal is transmitted to the wireless communication unit 201 included in the broadcast program receiving and recording apparatus 200. The radio communication unit 201 that has received the digital video / audio signal
The audio signal is modulated for wireless transmission, and then transmitted to the antenna unit 202. The signal is transmitted to the antenna unit 20
In step 2, the electric signal is converted into a radio wave signal and emitted into the air. The radio signal is transmitted to the antenna unit 11 of the display unit 100.
At 1, the signal is converted into an electric signal and input to the wireless communication unit 102. The wireless communication unit 102 demodulates the input signal, converts the signal back to the original digital video / audio signal, and sends the signal to the signal processing unit 110.

(Video / Audio Signal Display / Playback Means)
The signal processing unit 110 that has received the digital video / audio signal
The digital video / audio signal is separated into a video signal and an audio signal, and the video signal is converted into a data format that can be handled by the display display 101, and then converted to a data format that can be handled by the speaker 112. Send it to the speaker 112. The display 101 displays an image based on the data sent from the signal processing unit 110. The speaker 112 outputs a sound reproduced based on the data sent from the signal processing unit 110.

(Charging / Power Supply Means) When the display unit 100 is mounted on the stand unit 300, the AC power supplied from the power line via the power plug 310 and the power line 313 is supplied to the power circuit 301 of the stand unit 300. Is converted into DC power, and each component of the stand unit 300 and the second
To the charging / power-supplying device 304. The DC power supplied to the second charging / power supply device 304 is
Contact current is supplied between (312) and the contact terminal 1 (114) and supplied to the charging / power supply control unit 115 of the first charging / power supply device 104 of the display unit 100. Charge / power supply control unit 115
From the signal control unit 109, whether the display unit 100 is operating,
It receives data for determining whether it is not in operation or not, and supplies power to the power supply circuit 107 if it is in operation.

The charge / power supply control unit 115 receives data indicating the state of charge of the battery 103 from the battery fuel gauge 113, and displays the state where the display unit 100 is inactive and the battery 103 is not fully charged. If so, power is supplied to the charging circuit 108. On the other hand, charging / power supply control unit 1
15 is the charging circuit 1 when the battery 103 is fully charged.
The power supply to 08 is stopped. The power supply circuit 107 that has received the power supplies power to the entire display unit 100. Then, the charging circuit 108 that has received the electric power supplies the battery 10
3 is supplied.

(Power ON / OFF means) Display unit 100
2 is mounted in the recess of the stand unit 300 as shown in FIG. 2, the weight of the display unit 100 on the stand unit 300 is detected by the display unit detection switch 302, and the power supply circuit control unit To 303, a signal of "display unit present" is sent. The power supply circuit control unit 303 receiving the signal of “display unit present” sends the signal of “display unit present” to the power switch 2 (311) as it is. The power switch 2 (311) that has received the “display unit present” signal connects a power supply line for supplying power to the power supply circuit 301 and turns on power supply to the stand unit 300.

As shown in FIG. 3, when the display unit 100 is detached from the stand unit 300, the display unit detection switch 302 detects that the display unit 100 no longer weighs itself on the stand unit 300, and Detection switch 302
Sends a signal of “no display section” to the power supply circuit control section 303. The power supply circuit control unit 303 includes the stand unit 300
After confirming in the state of the signal processing unit 306 that communication has not been performed or has been completed, "No display unit"
To the power switch 2 (311). The power switch 2 (311) that has received the signal of “no display section”
The power supply line for supplying power to the power supply circuit 301 is disconnected, and the power supply to the stand unit 300 is turned off.

(Display unit power OFF means)
As will be described later, the operation may be performed as follows. When the power of the display unit 100 is turned on, first, the communication state detection unit 511, like a general wireless communication unit,
A signal received by the antenna unit 111 is detected by the wireless communication unit 102, and it is confirmed whether or not a frequency channel used for wireless communication is free. If the channel to be used is vacant, the communication with the broadcast program receiving and recording apparatus 200 is started as described in the above description of the operation of the wireless communication means. The information that the communication channel is congested is transmitted from the wireless communication control unit 116 in the 102 to the signal control unit 109. The signal control unit 109 includes the signal processing unit 11
0, the display display 101 indicates that the communication channel is congested, and waits for a new operation by the user. If there is a user operation on the operation panel 106, the process proceeds to a process corresponding to the operation content. However, if the user operation is not performed from the operation panel unit 106 for a fixed time or more, the signal control unit 109 starts charging. Send display unit power OFF information to the power supply control unit 115.

The stand attachment detection unit 507 is provided on the display unit 10
0 is attached to or not attached to the stand unit 300 by detecting the presence or absence of energization supplied from the contact terminal 1 (114), and if attached, the stand attachment detection unit 507
The stand mounting information is returned to the signal control unit 109, and the operation wait state of the user is maintained. When the information is not mounted, the charging / power supply control unit 115 controls the power switch 1 (1).
17) is turned off and the display unit 100 is
The power supply to the whole is stopped to reduce battery consumption. When restarting, manually turn on the power switch 1
Turn on (117) and restart the power supply from the battery 103, or attach the display unit 100 to the stand unit 300 and start the power supply from the stand unit 300 to the display unit 100.

(Explanation of Operation of Non-Contact Communication Means) Display Unit 10
When performing non-contact communication from 0 to the stand unit 300, the first high-speed infrared communication unit 105 that has received the transmission data transmitted from the signal processing unit 110 modulates the transmission data for infrared communication. Then, an electric signal is converted into an infrared signal and transmitted to the second high-speed infrared communication unit 305. The second high-speed infrared communication unit 305 that has received the infrared signal converts the received signal into an electric signal, performs demodulation, and sends the signal to the signal processing unit 306.

When performing non-contact communication from the stand unit 300 to the display unit 100, the second high-speed infrared communication unit 3 that has received the transmission data transmitted from the signal processing unit 306
In step 05, the transmission data is modulated for infrared communication, then converted from an electric signal to an infrared signal, and transmitted to the first high-speed infrared communication unit 105. The first high-speed infrared communication unit 105 that has received the infrared signal
Converts the received signal into an electric signal, demodulates the signal, and sends the signal to the signal processing unit 110.

(Explanation of Operation of Function Expansion Means) Stand Unit 3
In 00, an optional connection connector 308 for connecting a device to be an option 400, for example, a peripheral device such as a camera 401, a disk drive 402, and a memory card reader 403, a sensor, etc., and an AV for connecting an AVC device 410.
An external interface 307 having a C device connection connector 309 is provided. This wireless network terminal
As shown in FIG. 2, the above-mentioned options and AVC equipment can be utilized while the display unit is mounted on the stand unit.

The case where the video signal transmitted from the broadcast program receiving and recording apparatus 200 is recorded on the portable disk drive 402 connected as an option will be described. The digital video signal is transmitted from the wireless communication unit 500 to the signal processing unit 110. The signal processing unit 110
After converting the video signal into a format suitable for infrared communication, the video signal is sent to the first high-speed infrared communication unit 105.
The video signal transmitted to the first high-speed infrared communication unit 105 is transmitted to the stand 300 by the non-contact communication means 504.
To the signal processing unit 306. Signal processing unit 306
Converts the video signal into a data format that can be handled by the disk drive device 402 connected as an option, and sends it to the external interface 307. The external interface 307 is a portable disk drive 4
The video signal is transmitted to the portable disk drive device 402 via the optional connector 308 in accordance with the communication protocol adopted between the portable disk drive 402 and the external device. The portable disk drive device 402 records the transmitted video signal on a disk in the device.

Next, a case where a video signal output from the digital video camera 411 connected to the external interface 307 is transmitted to the broadcast program receiving and recording apparatus 200 will be described. In accordance with the communication protocol adopted between the external interface 307 and the digital video camera 411, the digital video signal output from the digital video camera 411 is transmitted to the AVC device connector 309.
Is transmitted to the external interface 307 via the.
The external interface 307 demodulates a digital video signal from the transmitted data and sends the demodulated digital video signal to the signal processing unit 306. The signal processing unit 306 converts the video signal into a format suitable for infrared communication, and sends it to the second high-speed infrared communication unit 305. The video signal transmitted to the second high-speed infrared communication unit 305 is transmitted to the signal processing unit 110 of the display unit 100 by the non-contact communication unit 504. The signal processing unit 110 converts the video signal into a format suitable for wireless communication, and sends the converted signal to the wireless communication unit 102. The video signal transmitted to the wireless communication unit 102 is transmitted to the broadcast program receiving and recording device 200 by the wireless communication unit 500.

FIG. 4 is a block diagram showing the configuration of another embodiment of the wireless network terminal according to the present invention.
Note that the same components as those in the embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. The power supply control unit 508 in FIG. 4 has the same function as the charge / power supply control unit 115 (see FIG. 1). The wireless network terminal in FIG. 4 is roughly divided into a display unit 100 and a stand unit 300, and the display unit 100 includes a display unit 51.
0 and other power supplies and their control circuits.

The display unit 510 includes an antenna unit 111, a wireless communication unit unit 102, a signal processing unit 11
0, a display 101, a speaker 112, a communication state detector 511, a signal controller 109, and an operation panel 106. A power supply and its control circuit other than the display unit 510 include a power supply control unit 508, a timer 509, a stand attachment detection unit 507, a charging circuit 108,
It comprises a battery 103, a switch 1a (117a), a switch 1b (117b), a power switch 117c), and a contact terminal 1 (114).

Next, the operation of the wireless network terminal shown in FIG. 4 will be described below. The power supply unit 508 is always supplied with power from the power supply circuit 301 or the battery 103 regardless of whether the display unit 100 is attached to the stand unit 300 or not. When the display unit 100 is mounted on the stand unit 300, the power supply circuit 301, the contact terminal 2 (312), the contact terminal 1 (114), the switch 1
a (117a), when the power is supplied from the power supply circuit 301 and the display unit 100 is not mounted on the stand unit 300, the battery 103 and the switch 1b (1
17b), the power is supplied from the battery 103 through the path of the switch 1a (117a).

The communication state detecting section 511 detects from the wireless communication unit section 102 whether or not a frequency channel used for wireless communication is vacant, and applies the detection result to the power control section 508. Also, a stand attachment detection unit 507
Detects whether or not the display unit 100 is attached to the stand unit 300 based on the presence or absence of energization supplied from the contact terminal 1 (114), and compares the detection result with the power control unit 508.
Is applied. The power control unit 508 has a built-in timer 509, and has a communication state detection unit 511 and a stand attachment detection unit 50.
7 operates as follows based on the respective detection results from.

FIG. 5 is a flowchart showing a processing procedure of the power control unit of the wireless network terminal shown in FIG. The operation of the power control unit will be described below with reference to FIG. First, it is determined whether or not the display unit 100 is mounted on the stand unit 300 based on the detection result from the stand mounting detection unit 507 (step S501). If the switch 1a has been attached, the process proceeds to step S502.
After switching (117a) to the power supply circuit 301 side, the process returns to step S501.

If it is not mounted, step S
Proceeding to 503, switch 1a (117a) is
03, switch 1b (117b) is turned on
After (Step S504), the process proceeds to Step S505. In step S505, the communication state detection unit 511
It is determined whether or not the frequency channel used for the wireless communication is vacant, that is, whether or not the communication state is good, based on the detection result from. If the communication state is good, step S
Return to 501.

If the communication state is bad, the user is notified of the poor communication state from the display 101 and the speaker 112 via the signal control section 109 and the signal processing section 110 (step S506), and then the step S507.
Proceed to. In step S507, the operation panel 106
It is determined whether or not the operation has been performed by the user via the signal control unit 109 from. If the operation has been performed, the processing of the operation contents is performed (step S508), and then the operation proceeds to step S508.
Return to 501.

If not operated, the timer 5
09 is incremented (t ← t + 1) (step S5
09), the process proceeds to step S510. Step S5
At 10, it is determined whether or not the time T has elapsed (t ≧ T?). If the time T has not elapsed, step S5
Return to 07. If the time T has elapsed, the switch 1b (117b) is turned off (step S511).
The process moves to step S512. In step S512, it is determined whether the power switch 117c has been pressed. If the power switch 117c has been pressed, the process returns to step S501. If not, the process proceeds to step S513. In step S513, based on the detection result from the stand attachment detection unit 507, the display unit 10
It is determined again whether 0 is attached to the stand section 300 or not.

If so, the process returns to step S502; otherwise, the process returns to step S512.
As described above, when the display unit 100 is attached to the stand unit 300, step S501 → step S502.
→ In the path of step S501, the power supply circuit 301 is always displayed on the display unit 510 regardless of the quality of the communication state.
More power is supplied. If the display unit 100 is not mounted on the stand unit 300, the process proceeds to step S501.
Power is supplied from the battery 103 to the display unit 510 only when the communication state is good in the route from step S503 to S505 to step S501, and when the communication state is bad, the step S501 to step S503 to S5 is performed.
12 → Step S501 or Step S501 →
In the path from steps S503 to S513 to S502, the operation is performed so that power is not supplied to the display unit 510.

FIG. 6 is a block diagram showing the configuration of another embodiment of the wireless network terminal according to the present invention. FIG. 6 is different from the configuration of the embodiment shown in FIG. 4 in that an input selection control unit 120, an input selection switch unit 121, a contact terminal 3 (122), and a forced selection switch unit 123 are added to the display unit 100. Further, the stand 300
A personal computer apparatus main body 600 is connected to a stand section 300, and a stand section 300 is provided with a signal processing section 320 and a contact terminal 4 (321) therefor. 6, the same components as those in the embodiment shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.

Personal computer main body 600
Is connected to the input side of the signal processing unit 320 of the stand unit 300, and the output side of the signal processing unit 320 is connected to the contact terminals 4 (3
21) and the display unit 10 via the contact terminal 3 (122).
One input side 121 of the input selection switch unit 121 within 0
b, 121d. In the display unit 100, the output of the signal processing unit 110 is
21 is connected to the other input side 121a, 121c. Further, one output side 121 f of the input selection switch section 121 is connected to the speaker 112, and the other output side 121 e of the input selection switch section 121 is connected to the display 101. Further, a stand attachment detection unit 507 is connected to the input side of the input selection control unit 120, and the output side of the input selection control unit 120 is connected to the input selection switch unit 121. The forced selection switch unit 123 is connected to the input selection control unit 120.

Next, the operation of each block of the wireless network terminal shown in FIG. 6 will be described. The signal processing section 320 of the stand section 300 converts the monitor signal input from the personal computer apparatus main body 600 into a second video signal P2 and a second audio signal S2. The second video signal P2 is input to the input 121b of the input selection switch unit 121 of the display unit 100 via the contact terminal 4 (321) and the contact terminal 3 (122), and the second audio signal S2 is Terminal 4 (321) and contact terminal 3 (12
2) via the input selection switch unit 12 of the display unit 100
1 is input to the input side 121d. In the display unit 100, the first video signal P1 output from the signal processing unit 110 is input to the input side 121a of the input selection switch unit 121.
And the first audio signal S1 output from the signal processing unit 110 is input to the input side 12 of the input selection switch unit 121.
1c.

The input selection switch unit 121 outputs the first video signal P1 (input side 12) output from the signal processing unit 110.
1a) or the second video signal P2 (input side 121b) output from the signal processing unit 320 is selected and output (output side 121e), and the first video signal P2 output from the signal processing unit 110 is output. The audio signal S1 (input side 121c) or the second audio signal S output from the signal processing unit 320
2 (input side 121d) and output (output side 121f). The video signal selected and output by the input selection switch unit 121 is input to the display 101 and displayed as an image, and the audio signal selected by the input selection switch unit 121 is output from the speaker 112.
And output as audio. Further, the stand attachment detection unit 507 detects whether or not the display unit 100 is attached to the stand unit 300, and outputs a result of the detection to the input selection control unit 120.

When the display unit 100 is not mounted on the stand unit 300 based on the detection result input from the stand mounted detection unit 507, the input selection control unit 120 outputs the first video signal P1 and the first video signal P1. Is selected, and when the display unit 100 is mounted on the stand unit 300, the second video signal P2 and the second audio signal S2
The input selection switch unit 121 is controlled so as to select. In addition, when the forced selection switch unit 123 is turned on, the input selection control unit 120 forcibly forces the first video signal P1 and the first video signal P1 regardless of whether the display unit 100 is attached to the stand unit 300. The input selection switch unit 121 is controlled so as to select one audio signal S1.

FIG. 7 is a flowchart showing a processing procedure of the input selection control unit of the wireless network terminal shown in FIG. The operation of the input selection control unit will be described with reference to FIG. The input selection control unit 120 is constituted by, for example, a microcomputer. Hereinafter, the input selection control unit 1 in the case of being constituted by a microcomputer will be described.
20 will be described. First, step S701
It is checked whether or not the forced selection switch unit 123 is turned on. If the forced selection switch unit 123 is on, the process proceeds to step S703; otherwise, the process proceeds to step S702.

In step S702, it is checked whether or not the display unit 100 is mounted on the stand unit 300.
If the display unit 100 is mounted on the stand unit 300,
The process proceeds to step S704, and if the display unit 100 is not mounted on the stand unit 300, the process proceeds to step S703. In step S703, the input selection switch unit 121
To the wireless communication unit 102 side. That is, control is performed such that the first video signal P1 and the first audio signal S1 from the signal processing unit 110 are selected, and step S
Return to 701. In step S704, the input selection switch unit 121 is switched to the personal computer apparatus main body 600 side. That is, control is performed so as to select the second video signal P2 and the second audio signal S2 from the signal processing unit 320, and the process returns to step S701.

As described above, when the display unit 100 is mounted on the stand unit 300, the display unit 100 functions as a monitor of the personal computer apparatus main body 600, and the display unit 100 is detached from the stand unit 300. The display unit 100 displays an image wirelessly transmitted from the broadcast program receiving and recording device, and performs, for example, a function of a wireless television.

[0054]

As described above, according to the wireless network terminal of the present invention, the physical connection between the display unit and the stand unit is performed only by contact, so that the display unit is attached to the stand unit. Removal is feasible. Therefore, in an environment in which the wireless connection between the broadcast program receiving and recording apparatus and the display unit is maintained, services such as broadcasting, viewing of recorded images, and Internet access using the display unit as a wireless network terminal can be used for information and power supply wiring. The effect that it can be used anywhere without being caught is obtained.

Further, according to the wireless network terminal of the present invention, when the display unit is detached from the stand unit, the power consumption in the stand unit is completely zero and the wireless communication cannot be established. The effect of completely reducing the power consumption of the display unit to zero can be obtained.

According to the wireless network terminal of the present invention, options connected to the external interface of the stand unit, for example, peripheral devices such as a camera, a disk drive, and a memory card reader, without impairing the portability of the display unit. , Sensors and the like can be used as options of the wireless network system.

Further, according to the wireless network terminal of the present invention, a personal computer apparatus main body can be connected to the stand section, and the display section displays an image wirelessly transmitted from the broadcast program reception / recording apparatus. ,
Two functions of the personal computer apparatus main body and the monitor apparatus can be realized. Further, by automatically switching between the two functions depending on whether the display unit is mounted on the stand unit, it is possible to save the trouble of switching and improve the usability.

Further, according to the wireless network terminal of the present invention, the display section is forcibly selecting a switch section for forcibly selecting a video signal and an audio signal wirelessly transmitted from the broadcast program receiving and recording apparatus. By providing, in addition to the convenience of the automatic switching, when the display unit is mounted on the stand unit and is required even during operation of the personal computer device main body, it is wirelessly transmitted from the broadcast program reception and recording device. The displayed image can be displayed and its contents can be confirmed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a configuration of an entire system of a wireless network terminal according to the present invention.

FIG. 2 is an external view of a wireless network terminal according to the present invention with a display unit mounted on a stand unit.

FIG. 3 is an external view of a wireless network terminal according to the present invention in a state where a display unit is detached from a stand unit.

FIG. 4 is a block diagram showing a configuration of another embodiment of the wireless network terminal according to the present invention.

FIG. 5 is a flowchart showing a processing procedure of a power control unit of the wireless network terminal shown in FIG. 4;

FIG. 6 is a block diagram showing a configuration of another embodiment of the wireless network terminal according to the present invention.

FIG. 7 is a flowchart illustrating a processing procedure of an input selection control unit of the wireless network terminal illustrated in FIG. 6;

[Explanation of symbols]

100 display unit, 101 display display, 102
Wireless communication unit, 103, battery, 104, first charging / power supply device, 105, first high-speed infrared communication unit, 106, operation panel unit, 107, power supply circuit, 10
8: charging circuit, 109: signal control unit, 110: signal processing unit, 111: antenna unit, 112: speaker, 113 ...
Battery fuel gauge, 114 ... Contact terminal 1, 115 ... Charging /
Power supply control unit, 116: wireless communication control unit, 117: power switch 1, 117a: switch 1a, 117b: switch 1b, 117c: power switch, 120: input selection control unit, 121: input selection switch unit, 122: contact terminal 3, 123: forced selection switch unit, 200: broadcast program reception and recording device, 201: wireless communication unit, 202: antenna unit, 300: stand unit, 301: power supply circuit, 30
2 ... display section detection switch, 303 ... power circuit control section, 3
04: second charging / power supply device, 305: second high-speed infrared communication unit, 306: signal processing unit, 307: external interface, 308: option connector,
309 AVC device connector, 310 Power plug, 311 Power switch 2, 312 Contact terminals 2, 3
13: power supply line, 320: signal processing unit, 321: contact terminal 4, 400: option, 401: camera, 402
... Disk drive, 403 ... Memory card reader, 4
10 ... AVC equipment, 411 ... Digital video camera, 5
00: wireless communication means, 501: reproduction output means, 502:
Charge / power supply means, 503: power ON / OFF means, 50
4: non-contact communication means, 505: function expansion means, 506 ...
Power OFF means, 507 ... Stand attachment detection unit, 508
.., Power supply control unit, 509, timer, 510, display unit, 511, communication state detection unit, 600, personal computer main body.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/76 H04N 5/76 Z (72) Inventor Takazo Hirata 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Akira Shibata 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Prefecture Inside Sharp Corporation (72) Zenhei Inventor 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Sharp Corporation (72) Inventor Tsutomu Sanehara 22-22, Nagaike-cho, Abeno-ku, Osaka-shi F-term (reference) 5C025 BA18 BA26 BA30 DA08 DA10 5C026 EA07 5C052 AB04 DD10 5C056 FA01 HA01 HA04 HA08 5C080 AA10 BB05 DD13 DD26 FF03 JJ02 JJ07 KK07

Claims (8)

[Claims] 1. A wireless network terminal comprising: a display unit having a built-in battery that operates only in a state of being wirelessly connected to a broadcast program receiving and recording device; and a stand unit having a built-in power supply circuit. The unit includes a first charging and power supply device that charges the battery and supplies power to the entire display unit, and the stand unit includes a second charging and power supply device that charges and supplies power to the display unit. Prepared,
By attaching the display unit to the stand unit, the first and second charging and feeding devices come into contact with each other, and from the power supply circuit to the display unit via the first and second charging and feeding devices. A wireless network terminal for charging and feeding power. 2. The first and second charging and feeding devices,
The contact is made via a connection terminal.
A wireless network terminal as described. 3. The display unit is mounted on the stand unit,
The power of the entire stand unit is turned on by the weight of the display unit being applied to the stand unit, and the display unit is removed from the stand unit so that the weight of the display unit is not applied to the stand unit. 3. The wireless network terminal according to claim 1, further comprising a power ON / OFF unit for turning off the power of the entire stand unit. 4. When the display unit cannot establish a wireless connection with the broadcast program receiving and recording device, power is turned off if the display unit is mounted on the stand unit. No, the power supply is continued as it is, and only when the display unit is not attached to the stand unit, if a predetermined inoperative time is detected, a power switch on a supply line from the battery to the entire display unit is turned off. The wireless network terminal according to any one of claims 1 to 3, further comprising means for turning off the battery and reducing battery consumption. 5. The communication between the display unit and the stand unit is performed by using infrared communication means that is at least as fast as the radio communication between the broadcast program receiving and recording device and the display unit, and the display is performed. 5. The apparatus according to claim 1, wherein a waiting time for data transmission from the unit to the stand unit does not occur, thereby reducing a memory capacity of the display unit that holds the data waiting for transmission. A wireless network terminal according to claim 1. 6. The stand unit generally has a hub function for connecting a digital AVC device used in a stand-alone mode, and a digital unit connected to the stand unit while the display unit is mounted on the stand unit. AVC equipment,
The wireless network terminal according to any one of claims 1 to 5, further comprising communication means for connecting to a home AVC network including the broadcast program receiving and recording device and transmitting and receiving data. 7. The signal processing unit for converting the monitor signal from the personal computer device into a second video signal and a second audio signal. With
A first video signal and a first audio signal wirelessly transmitted from the broadcast program receiving and recording device;
Or an input selection switch unit for selecting one of the second video signal and the second audio signal, and the first video signal and the first video signal when the display unit is not mounted on the stand unit. An input selection control unit that selects an audio signal and controls the input selection switch unit to select the second video signal and the second audio signal when the display unit is mounted on the stand unit; The wireless network terminal according to any one of claims 1 to 6, comprising: 8. The display unit includes a forced selection switch unit for forcibly selecting the first video signal and the first audio signal, and when the forced selection switch unit is turned on, the display unit includes: The input selection control unit controls the input switch unit to forcibly select the first video signal and the first audio signal regardless of whether the display unit is attached to the stand unit or not. The wireless network terminal according to claim 7, wherein