CN100454951C - Device and method for expanding display carrier of handheld mobile device - Google Patents

Abstract

A device and method for expanding a display carrier of a handheld mobile device (1), wherein the expanding device includes: a signal modulation circuit (2), used to modulate a video signal of the handheld mobile device into a display signal that can be displayed on a television; an IR Modulating circuit (41), used for modulating the display signal output by the signal modulating circuit into an infrared signal; IR transmitting circuit (51), used for transmitting the infrared signal; IR receiving circuit (52), used for receiving the infrared signal emitted by the IR transmitting circuit an infrared signal; and an IR demodulation circuit (42), used to demodulate the infrared signal received by the IR receiving circuit into a display signal. Wherein, the display signal output by the IR demodulation circuit will be displayed on the TV screen (6) via the TV input interface (32). In this way, the information displayed by the handheld mobile device can be transmitted to the TV for display through the expansion device and method.

Description

Device and method for expanding display carrier of handheld mobile device

【Technical field】

The present invention relates to a device and a method for expanding a display carrier, in particular to a device and a method for expanding a display carrier of a handheld mobile device.

【Background technique】

With the development of communication technology and the Internet, mobile phones, personal digital assistants (PDAs) and other handheld mobile devices are widely used, such as wireless Internet access, sending and receiving emails, etc. As the content that can be displayed becomes more and more abundant, consumers' demand for the display screen of handheld mobile devices is developing in the direction of large screen and colorization. Through the larger color display, consumers can fully enjoy a variety of information resources. However, in some cases, such as browsing web pages, watching video on demand, etc., these functions cannot be fully realized due to the size and resolution of the display screen. On the other hand, in response to the trend of light, thin, short, and small shapes of handheld mobile devices, simply enlarging the display screen cannot completely solve the above problems.

At present, many common and interoperable communication connections have been established between handheld mobile devices and computers (computers), and the application of computers as display carriers for handheld mobile devices has become increasingly common, such as the recently popular "camera mobile phones", which have Digital camera camera, the photos taken can be transmitted to a computer through a data cable or an infrared (Infra-red, IR) method, and displayed on a computer display screen for further digital processing.

Chinese Invention Patent Application No. 00136838 published on July 31, 2002 discloses a method for editing mobile phone information, which converts the information to be edited in the mobile phone into a text format (TXT), and then connects the mobile phone The transmission line with the computer is sent to the computer, and the information is edited using any editing software in the computer, and then the edited information is sent back to the mobile phone through the transmission line, and the processor of the mobile phone is used to store the information in the original position.

In addition, the industry has also made many attempts and efforts in the interoperability of computers and televisions. For example, the Chinese Utility Model Patent No. 94238470 issued on October 25, 1995, which provides a computer television, consists of a high-frequency and intermediate-frequency amplifying circuit, a detection circuit, a color decoding circuit, a color driving circuit, a display, a computer circuit, an image The processing circuit, the field circuit, and the line circuit are connected. The line and field circuits of the TV are designed to be compatible with the line and field circuits of the computer image processing circuit, and can be synchronized. The color amplification channel of the TV and the color image of the computer The display is unified, and the TV picture tube and the computer color display are shared, so that the functions of the computer and the TV are realized in one electrical appliance.

The above-mentioned Chinese invention patent application No. 00136838 shows that the application of mobile phones and other handheld mobile devices using peripheral devices such as computers as display carriers has gradually developed; Chinese utility model patent No. 94238470 discloses the application of interactive display carriers between televisions and computers .

And the Chinese invention patent application No. 99102245 published on August 23, 2000 discloses a kind of communication device that can be connected with the output device. If this communication device is a telephone, it includes: a telephone host, a central processing unit 1. A display controller and a control module. According to the control of the control module, the central processing unit transmits the data received by the telephone host to the display controller, and the display controller generates corresponding signals according to the data, and sends them to output devices such as Television set: connect the telephone set and the television set by direct connection, so as to realize the purpose of displaying text, images and other information in the telephone set on the television set. However, the telephone set performs wired communication through a fixed network, and the current fixed network supports limited functions, so the content that can be displayed on the telephone set is also relatively limited, and the television set has not been fully utilized as a display carrier for these communication devices.

Current TV technology allows TVs to perform well in both color and resolution. Combined with the Internet, handheld mobile devices can display richer information. Therefore, it is necessary to establish a communication connection between the handheld mobile device and the TV, so that the content displayed on the handheld mobile device can be transmitted to the TV for display, thereby expanding the TV to become another display carrier of the handheld mobile device, and also expanding the Applications for handheld mobile devices.

【Content of invention】

An object of the present invention is to provide an expansion device for a display carrier of a handheld mobile device, which establishes a communication connection between the handheld mobile device and a TV, so that the TV becomes a display carrier of the handheld mobile device.

Another object of the present invention is to provide a method for expanding the display carrier of the handheld mobile device, which can establish a communication connection between the handheld mobile device and the TV, so that the TV becomes the display carrier of the handheld mobile device.

To achieve the above object, the present invention provides an expansion device and method for a display carrier of a handheld mobile device, wherein the expansion device includes: a signal modulation circuit for modulating a video signal output by a handheld mobile device into a display signal; an IR modulation circuit, It is used to modulate the display signal output by the signal modulation circuit into an infrared signal; the IR transmitting circuit is used to transmit the infrared signal; the IR receiving circuit is used to receive the infrared signal transmitted by the IR transmitting circuit; and the IR demodulation circuit is used to convert The infrared signal received by the IR receiving circuit is demodulated into a display signal. Wherein, the display signal output by the IR demodulation circuit will be displayed on the TV screen through the TV input interface. In this way, the information displayed by the handheld mobile device can be transmitted to the television for display through the expansion device and method.

The device and method for expanding the display carrier of the handheld mobile device provided by the present invention can make full use of the TV as the display carrier of the handheld mobile device, and display the video signal of the handheld mobile device on the TV screen to overcome the problem caused by handheld mobile devices. The limitations imposed by the small screen size of the device when performing corresponding functions.

【Description of drawings】

FIG. 1 is a block diagram of a display carrier expansion device for a handheld mobile device provided by the present invention.

FIG. 2 is a flow chart of the method for expanding the display carrier of the handheld mobile device provided by the present invention.

【Detailed ways】

Please refer to FIG. 1 , which is a block diagram of an expansion device for a display carrier of a handheld mobile device provided by the present invention. The handheld mobile device involved in the present invention is an electronic device with a radio frequency module capable of sending and receiving information wirelessly, such as a mobile phone. The handheld mobile device 1 outputs a video signal to the signal modulation circuit 2, and the signal modulation circuit 2 modulates the video signal into a display signal. There are two options in the way of outputting the display signal. One is a wired method, that is, the output interface 31 of the handheld mobile device and the input interface 32 of the TV are connected through wired cables such as data lines, so that the display signal can be transmitted to the input interface 32 of the TV, and then displayed on the TV screen. 6 on. Another way is infrared output, the display signal will first be modulated into an infrared signal in the IR modulation circuit 41, then transmitted to the IR receiving circuit 52 by the IR transmitting circuit 51, and then demodulated into a display signal in the IR demodulating circuit 42 , and finally displayed on the TV screen 6 via the TV input interface 32. In this embodiment, the signal modulating circuit 2 , the IR modulating circuit 41 and the IR emitting circuit 51 can all be embedded in a video encoding (Video Encode) chip, and further built into the handheld mobile device 1 . The IR receiving circuit 52 and the IR demodulating circuit 42 can be built into the television, or be independent components, and are electrically connected to the input interface of the television through a connector (not shown).

IR解调电路42将IR接收电路52接收的红外信号解调为显示信号。在步骤S8中，该显示信号经由电视机输入接口32在电视机显示屏6上显示。若在步骤S4中选择有线方式输出，则执行步骤S9，显示信号通过数据线等有线电缆由手持行动设备输出接口31传送至电视机输入接口32；然后最后执行步骤S8，该显示信号经由电视机输入接口32在电视机显示屏6上显示。步骤S10为结束步骤。Please refer to FIG. 2 , which is a flow chart of the method for expanding the display carrier of the handheld mobile device provided by the present invention. After starting step S1 , execute step S2 , the handheld mobile device 1 sends the video output signal to the signal modulation circuit 2 . Step S3 is executed again, and the signal modulation circuit 2 modulates the video signal into a display signal. Thereafter, step S4 will be executed, and the user decides whether to output the display signal in a wired mode or an infrared mode, which can be realized by activating the corresponding function options provided by the built-in software of the handheld mobile device 1 . If the infrared mode is selected, step S5 is performed, and the display signal is modulated into an infrared signal by the IR modulation circuit 41 . Then step S6 is executed, the IR transmitting circuit 51 transmits the infrared signal to the IR receiving circuit 52 . Then execute step S7

The IR demodulation circuit 42 demodulates the infrared signal received by the IR receiving circuit 52 into a display signal. In step S8, the display signal is displayed on the TV screen 6 via the TV input interface 32 . If the wired mode output is selected in step S4, then step S9 is performed, and the display signal is transmitted from the handheld mobile device output interface 31 to the TV input interface 32 through wired cables such as data lines; The input interface 32 is displayed on the TV screen 6 . Step S10 is an end step.

Claims (5)

1. An expansion device for a display carrier of a handheld mobile device, which is used to expand a television set into a display carrier for a handheld mobile device, the handheld mobile device has a radio frequency module, and can send and receive information wirelessly, characterized in that: the expansion device include: The signal modulation circuit is used to modulate the video signal of the handheld mobile device into a display signal that can be displayed on the TV; An IR modulation circuit, used to modulate the display signal output by the signal modulation circuit into an infrared signal; an IR emitting circuit, used to emit the infrared signal; The IR receiving circuit is used to receive the infrared signal emitted by the IR emitting circuit; and The IR demodulation circuit is used to demodulate the infrared signal received by the IR receiving circuit into a display signal, and the display signal is displayed on the TV screen through the TV input interface. 2. The expansion device according to claim 1, characterized in that the expansion device has an output interface of a handheld mobile device, and when the wired output mode is selected, the display signal output by the signal modulation circuit can be transmitted from the output interface through a wired cable to the input interface of the TV, and then displayed on the TV screen. 3. The expansion device according to claim 1, wherein when the infrared output mode is selected, the display signal output by the signal modulation circuit is modulated and demodulated by IR, transmitted to the TV input interface, and displayed on the TV screen. 4. The expansion device according to claim 2, wherein the selection of the display signal output mode is realized by activating corresponding function options provided by the built-in software of the handheld mobile device. 5. A method for expanding the display carrier of a handheld mobile device, the handheld mobile device has a radio frequency module that can send and receive information wirelessly, and the method for expanding includes the steps of: The video output signal of the handheld mobile device is modulated by the signal modulation circuit into a display signal that can be displayed on the TV; When the wired output mode is selected, the display signal is transmitted by the handheld mobile device to the TV input interface through the wired cable; When the infrared output mode is selected, the display signal is modulated into an infrared signal by the IR modulation circuit; The IR transmitting circuit transmits the infrared signal; The IR receiving circuit receives the emitted infrared signal; The IR demodulation circuit demodulates the received infrared signal into a display signal; and The demodulated display signal is displayed on the TV screen through the TV input interface.

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