KR20040073784A - Video output apparatus for mobile communication device using bluetooth - Google Patents

Abstract

PURPOSE: An image output device of a mobile communication terminal using Bluetooth is provided to output digital image data outputted from a mobile communication terminal through a Bluetooth interface, and to continuously input the image data by using a Bluetooth protocol, thereby displaying the image data in various video formats. CONSTITUTION: A video decoder comprises as follows. A Bluetooth communication module(303) inputs digital image data. An image decoder(304) decodes a received image. A Bluetooth slave module(305) interprets digital image data having a Bluetooth protocol type. A frame buffer(306) buffers the digital image data, and outputs the buffered digital image data. The first converter(307) converts the digital image data into digital data. A DAC(Digital to Analog Converter)(308) converts the digital image data into an analog image, and outputs the analog image to an outer display device. The second converter(309) converts analog image data, and outputs the converted image data.

Description

Image output device of mobile communication terminal using Bluetooth {VIDEO OUTPUT APPARATUS FOR MOBILE COMMUNICATION DEVICE USING BLUETOOTH}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image output apparatus using Bluetooth of a mobile communication terminal, and more particularly, to a mobile terminal using Bluetooth for outputting an image using a Bluetooth interface of a mobile communication terminal and outputting the output image through an external display device. An image output apparatus of a terminal.

As the functions of the mobile communication terminal have advanced, functions beyond the wireless communication such as a camera function and a multimedia playback function have been added to the mobile communication terminal beyond simple wireless communication means.

Such multimedia functions are being gradually expanded by improving display parts of mobile communication terminals and realizing high speed communication, and have already been commercialized to use mobile communication terminals as the ultimate portable entertainment system.

Among the multimedia functions, the camera function and the multimedia playback function are the most popular advanced functions, and the quality of the screen is high enough to be able to shoot through the camera and to watch video on video (VOD).

However, the mobile communication terminal itself is intended to be used for moving and making phone calls, so that a display device provided with video and various additional services is limited to the size of the liquid crystal display of the terminal itself. Therefore, in the home where there is little movement, the liquid crystal display will not use the additional function by using the small mobile communication terminal, and there arises a problem of simply using the function of the telephone.

1 is a block diagram illustrating a screen output in a conventional mobile communication terminal. The processor 100 performs an image processing operation for communication and image output, and buffers the image data output from the processor 100. A frame buffer 101, an LCD driver 102 for driving an image data output through the frame buffer 101 through an LCD, and a digital image data driven by the LCD driver 102. LCD display 103 to display the.

2 is a block diagram illustrating a conventional mobile communication terminal equipped with a Bluetooth communication function. The processor 200 includes a Bluetooth master module and performs an image processing operation for Bluetooth communication and image output. The Bluetooth communication module 201 performs actual Bluetooth protocol communication under the control of the Bluetooth master module, the frame buffer 202 buffering the image data output from the processor 200, and the frame buffer 202. An LCD driver 203 is configured to drive the image data to be displayed through the LCD, and an LCD display 204 is driven by the LCD driver 203 to display digital image data.

As described above, the conventional mobile communication terminal is configured to output an image through an internal LCD display, but in fact, the LCD display has an LCD display of a predetermined size or more due to problems of portability, manufacturing cost, and power consumption of the terminal. It cannot be built.

However, the trend of technological development is to ensure a high-resolution color screen output using the LCD, and a lot of games for mobile phones using a high resolution screen output has appeared. However, there is a problem in that the narrow LCD screen embedded in the conventional mobile phone does not satisfy the user's desires by narrowing and sharpening the user's vision.

In addition, even in the case of a terminal capable of Bluetooth communication, in the process of transmitting the image output data to the piconet of the Bluetooth, all except the Bluetooth communication module are driven in software inside the processor of the terminal, so if the resolution of the image data is high, the processor There is a problem that gives a lot of load.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and uses a Bluetooth to output an image using a Bluetooth interface of a mobile communication terminal, and output the output image through an external display device. Its purpose is to provide an image output apparatus of a communication terminal.

The present invention for achieving the above object, Bluetooth interface means for receiving digital image data from a mobile communication terminal having a Bluetooth communication means; A frame buffer for buffering and outputting the digital image data received through the Bluetooth interface means to an external display device; And decoder means for converting the digital image data buffered in the frame buffer into a corresponding video format according to the type of external display means.

1 is a block diagram showing a configuration for screen output in a conventional mobile communication terminal.

Figure 2 is a block diagram showing the configuration of a mobile communication terminal equipped with a conventional Bluetooth communication function.

3 is a block diagram showing the configuration of an image output apparatus using Bluetooth of a mobile communication terminal according to the present invention;

* Description of the symbols for the main parts of the drawings *

300: Bluetooth master module 301: video encoder

302303: Bluetooth communication module 304: video decoder

305: Bluetooth slave module 306: frame buffer

307: first converter 308: die converter

309: second converter

According to the present invention, digital image data output from a mobile communication terminal can be output to the outside through a Bluetooth interface, and the image data can be continuously input using a Bluetooth protocol and displayed through an external display means such as a TV. It features so that it can be converted to various video formats and output.

That is, the present invention relates to a mobile communication terminal having a Bluetooth interface means for outputting digital image data and a video decoder device having Bluetooth interface means for receiving digital image data from the terminal. A Bluetooth pico-net is formed in the device to enable image data communication using the Bluetooth protocol, and to output continuous moving images between the decoder devices.

In other words, the present invention can be said to be a device having Bluetooth communication means and various video format decoders.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a block diagram showing a configuration of an image output apparatus using Bluetooth of a mobile communication terminal according to the present invention, wherein the mobile communication terminal further includes a Bluetooth master module and a Bluetooth communication module for outputting digital image data to the outside. And output the digital image data buffered in the frame buffer 101 of the terminal through the Bluetooth master module 300 and the communication module 302. In this case, an image encoder 301 is further included between the Bluetooth master module 300 and the Bluetooth communication module 302.

Referring to FIG. 3, the video decoder of the present invention decodes a picture received through the Bluetooth communication module 303 and the Bluetooth communication module 303 for receiving digital image data from a mobile communication terminal using a Bluetooth protocol. An image decoder 304, a Bluetooth slave module 305 for interpreting the digital image data of the Bluetooth protocol type, and a digital image data received through the Bluetooth slave module 305 for buffering and outputting to an external display device. A frame buffer 306, a first converter 307 for converting digital image data buffered in the frame buffer 306 into digital data converted into vertical / horizontal synchronization and color signals, and the vertical / horizontal synchronization and color Convert digital image data by signals to analog images and output them to an external display device. Constitute including dieyi converter 308 and second converter 309 for converting and outputting an analog image data converted in the dieyi converter 308 to S-Video format.

The Bluetooth communication module and the master / slave module are communication interface means between the terminal and the video decoder device, and can be converted and applied to a higher speed communication interface later.

Hereinafter, referring to the operation of the device configured as described above, the Bluetooth master module 300 continuously operates the digital image data contained in the frame buffer 101 to output to the Bluetooth piconet using the Bluetooth protocol. The digital video data of the Bluetooth protocol type transmitted through the Bluetooth piconet is continuously input to the Bluetooth slave module 305 of the video decoder. It is stored in the buffer 306.

In addition, when using the Bluetooth protocol for wireless communication by forming a Bluetooth piconet, the available bandwidth is 1Mbps or less. This is enough to send a QCIF sized screen, but it is quite lacking when sending a larger screen. Thus, when continuously transmitting a screen that cannot handle the bandwidth, the Bluetooth master module 300 and the Bluetooth slave module 305 respectively compress and transmit the image data.

In addition, since the video decoder is wirelessly connected with the mobile communication terminal, since the video decoder cannot operate by directly receiving power from the terminal, the video decoder has its own power supply 310, which uses a battery or an external power supply. Power supply using a direct current adapter).

As described above, according to the present invention, the Bluetooth master module 300 of the terminal continuously outputs digital image data contained in the frame buffer 101 through the image encoder 301 and the Bluetooth communication module 302 using the Bluetooth protocol. . Digital image data transmitted through the Bluetooth interface is continuously input to the Bluetooth slave module 305 via the image decoder 304 through the Bluetooth communication module 303. The Bluetooth slave module 305 interprets the digital image data of the Bluetooth protocol type and stores it in its own frame buffer 306.

Next, the digital image data stored in the frame buffer 306 outputs data of its own frame buffer for digital output, and converts the color space data of its own frame buffer 306 for analog RGB and components. The output signal is generated through the DMA conversion, the vertical synchronization signal, and the horizontal synchronization signal.

For the RCA and S-Video, the output signal for the analog RGB is converted once again to match the video format through the second converter 309 and output. In an embodiment of the invention the video decoder provides outputs for digital output (DVI), analog RGB (D-Sub), component, RCA (Composite), S-Video.

As described above, the present invention provides a standard image output terminal interface to a mobile communication terminal, so that various types of high resolution external display means can be mounted. Accordingly, the game screen operating in the mobile communication terminal can be output to the large TV screen through the component terminal, the RCA terminal, and the S-Video terminal, so that the terminal can be used as a substitute for a home game machine.

In addition, by outputting the Internet web browser screen running on the mobile terminal to the high-definition monitor through the DVI terminal or the D-sub terminal, the mobile terminal can be used as a substitute for the Internet terminal or for presentation purposes.

As described above, the image output device of the mobile communication terminal using Bluetooth according to the present invention has an effect of outputting an image using the Bluetooth interface of the mobile communication terminal and outputting the output image through an external display device.

Claims (3)

Bluetooth interface means for receiving digital image data from a mobile communication terminal having Bluetooth communication means; A frame buffer for buffering and outputting the digital image data received through the Bluetooth interface means to an external display device; And decoder means for converting the digital image data buffered in the frame buffer into a corresponding video format according to the type of external display means. The Bluetooth device as claimed in claim 1, wherein the decoder means comprises a plurality of converters and a De-D converter for generation of vertical / horizontal synchronization signals, color space conversion, and die conversion. Image output device of a mobile communication terminal using a. The apparatus of claim 1, wherein the Bluetooth interface means comprises: a Bluetooth communication module for receiving digital image data from a mobile communication terminal, an image decoder for decoding an image received through the Bluetooth communication module, and a digital image in the form of the Bluetooth protocol. An image output device of a mobile communication terminal using Bluetooth, comprising a Bluetooth slave module for interpreting data.