Patent Publication Number: US-2006020980-A1

Title: Wireless digital audio and video transmission device

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to an audio and video (AV) transmission device, and particularly to a wireless digital audio and video transmission device which wirelessly transmits AV signals from a multimedia video device thereof to a display thereof.  
      2. Prior Art  
      As development of technology, various multimedia video devices, such as a DVD player, a cable TV and a satellite TV, are widely applied in modern life. However, each conventional multimedia video device is a separated system through wire connection, which results that the multimedia video device can only be used in a limited space. For example, when a person leaves a room in which he watches TV, he cannot go on watching TV. Therefore, it is inconvenient to use the multimedia video device.  
      Furthermore, when a user does not take with a conventional multimedia video device, he cannot watch a program through the multimedia video device. In other words, when a user leaves a conventional multimedia video device, he cannot use it. Therefore, use of the conventional multimedia video device is limited by space and so is inconvenient.  
     SUMMARY OF THE INVENTION  
      Accordingly, an object of the present invention is to provide a wireless digital audio and video transmission device, which includes a wireless emitter connected to a multimedia video device employed as an AV signal generator and a wireless receiver connected to a display device for receiving signals from the wireless emitter, whereby it is ready to display the signals from the AV signal generator and so it is convenient to watch a program without limitation of space.  
      Another object of the present invention is to provide a wireless digital audio and video transmission device, which includes a wireless receiver connected to a display device for displaying the received signals and a remote controller for selection of programs and tuning of volume whereby it is convenient to use a multimedia video device of the wireless digital audio and video transmission device without limitation of space.  
      Another object of the present invention is to provide a wireless digital audio and video transmission device, which connects a multimedia video device employed as an AV signal generator to a plurality of display devices through wireless AV signal transmission, whereby it is convenient to keep watching program without limitation of space.  
      To achieve the above-mentioned objects, a wireless digital audio and video transmission device in accordance with the present invention includes a multimedia video device employed as an AV signal generator, and at least one display device. The multimedia video device includes a wireless transmission module, a video compression module, a lock code module and an antenna device. The wireless transmission module includes a wireless emitter and a wireless receiver. The antenna device is communicated to the wireless receiver and the wireless emitter. Each display device includes a wireless transmission module and a display. The wireless transmission module includes a wireless emitter and a wireless receiver.  
      Other objects, advantages and novel features of the present invention will be drawn from the following detailed embodiment of the present invention with attached drawings, in which: 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a schematic view of a wireless digital audio and video transmission device of the present invention; and  
       FIG. 2  is a flow chart showing signal transmission of the wireless digital audio and video transmission device of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
      Referring to  FIGS. 1-2 , a wireless digital audio and video transmission device of the present invention includes a multimedia video device  10  and a plurality of display devices  20 . The multimedia video device  10  is employed as an audio and video (AV) signal generator, such as a DVD player, a cable TV, a satellite TV and a computer. The multimedia video device  10  includes a wireless transmission module  11 , a video compression module  12 , a lock code module  13  and an antenna device  14 . The wireless transmission module  11  may transmit signals through Bluetooth or Infrared Data Association (IrDA). The wireless transmission module  11  includes a wireless emitter  111  and a wireless receiver  112 . The video compression module  12  is employed to compress AV data to be in other format such as MPEG for facilitating to play and transmit. The lock code module  13  is configured with a lock code for verifying a received lock code signal and then deciding if the subsequential received signals access a controlling process. The antenna device  14  includes a first antenna  141  and a second antenna  142 . The first antenna  141  is communicated to the wireless receiver  112 . The second antenna  142  is communicated to the wireless emitter  111 .  
      The display device  20  includes a wireless transmission module  21  and a display  22 . The wireless transmission module  21  may transmit signals through Bluetooth or IrDA. The wireless transmission module  21  includes a wireless emitter  211  and a wireless receiver  212 . The display  22  is an LCD.  
      In this embodiment, the multimedia video device  10  is a computer which can be used to visit internet and receive or send emails. The multimedia video device  10  includes four AV contacts AV1, AV2, AV3 and AV4 for transmitting signals of a DVD, a TV, a SAT and so on. The wireless transmission modules  11 ,  21  transmit digital signals through 802.11a for high quality of digital signal transmission.  
      As shown in  FIG. 2 , the wireless receiver  112  of the multimedia video device  10  receives AV signals from the first antenna  141 . Then the AV signals are compressed by the video compression module  12  and then are transmitted to the wireless emitter  111  and emitted by the second antenna  142 . The wireless receiver  212  of the display device  20  receives the AV signals emitted by the second antenna  142  through wireless transmission and then transmits the AV signals to the display  22  for display.  
      Furthermore, the display  22  may be controlled by a remote controller  30 . That&#39;s, a password signal is input through the remote controller  30  and then emitted by the wireless emitter  211  of the display device  20 . The wireless receiver  112  of the multimedia video device  10  receives the password signal and then transmits the password signal to the lock code module  13 . When the password signal is verified, controlling signals are transmitted to the wireless receiver  212  and the display  22  of the display device  20  through the wireless emitter  111  and the second antenna  142 . Thus, the remote controller  30  can be used for selection of programs and tuning of volume whereby it is convenient to use a multimedia video device of the wireless digital audio and video transmission device without limitation of space.  
      As mentioned above, the wireless digital audio and video transmission device of the present invention provides the wireless transmission device to connect to the AV signal generator, and transmits AV signals to the wireless receiver of the display device through 802.11a for displaying the AV signals. Furthermore, a user can select a program and tune volume through the remote controller. It is convenient to use without limitation of space due to wireless transmission.  
      It is understood that the invention may be embodied in other forms without departing from the spirit thereof. Thus, the present examples and embodiments are to be considered in all respects as illustrative and not restrictive, and the invention is not to be limited to the details given herein.