Video display apparatus, video viewing glasses, and system comprising the display apparatus and the glasses

Abstract

Provided is a video system equipped with a video display apparatus, and video viewing glasses for use in viewing a video displayed on the video display apparatus. The video display apparatus includes: a display section for displaying a video; a synchronizing signal generator for generating an external synchronizing signal for notifying an end of displaying a frame constituting the video in synchronism with the video; and a synchronizing signal transmitter for transmitting the external synchronizing signal to the video viewing glasses. The video viewing glasses include: a synchronizing signal receiver for receiving the external synchronizing signal; an optical filter section having a pair of optical filters for adjusting amounts of light to be transmitted to a left eye and a right eye of a viewer, respectively; and an optical filter controller for controlling the optical filter section based on the external synchronizing signal.

1 . A video display apparatus for displaying a video to be viewed through video viewing glasses, comprising:
 a display section for displaying the video;   a synchronizing signal generator for generating an external synchronizing signal for notifying the video viewing glasses of an end of displaying a frame constituting the video in synchronism with the video; and   a synchronizing signal transmitter for transmitting the external synchronizing signal.   
     
     
         2 . The video display apparatus according to  claim 1 , wherein
 the external synchronizing signal is used in control of closing an optical filter section of the video viewing glasses.   
     
     
         3 . The video display apparatus according to  claim 1 , wherein
 the synchronizing signal generator generates the external synchronizing signal based on a display characteristic of the display section.   
     
     
         4 . The video display apparatus according to  claim 3 , wherein
 the display characteristic of the display section is an afterglow characteristic.   
     
     
         5 . The video display apparatus according to  claim 4 , wherein
 the display section is a plasma display panel.   
     
     
         6 . The video display apparatus according to  claim 1 , further comprising a transmission controller, wherein
 the transmission controller controls the synchronizing signal transmitter to transmit a synchronizing signal group comprising a plurality of the external synchronizing signals included in a predetermined time.   
     
     
         7 . The video display apparatus according to  claim 6 , wherein
 the synchronizing signal transmitter transmits one of the synchronizing signal groups under a control of the transmission controller a predetermined time after the other one of the synchronizing signal groups is transmitted under a control of the transmission controller.   
     
     
         8 . The video display apparatus according to  claim 7 , further comprising a remote controlling device for transmitting data for causing the video display apparatus to perform a predetermined operation to the video display apparatus, wherein
 the predetermined time equals twice of a time required for the remote controlling device to transmit the data, or more.   
     
     
         9 . The video display apparatus according to  claim 1 , wherein
 the video includes a first video and a second video,   the display section switchingly displays the first video and the second video with time,   the synchronizing signal generator generates two kinds of the external synchronizing signals for notifying a start of displaying a frame constituting the first video, an end of displaying the frame constituting the first video, a start of displaying a frame constituting the second video, and an end of displaying the frame constituting the second video, and   waveforms of the two kinds of the external synchronizing signals are different from each other.   
     
     
         10 . The video display apparatus according to  claim 9 , wherein
 the two kinds of the external synchronizing signals include a first synchronizing signal for notifying the start of displaying the frame constituting the first video, and the end of displaying the frame constituting the first video, and a second synchronizing signal for notifying the start of displaying the frame constituting the second video, and the end of displaying the frame constituting the second video.   
     
     
         11 . The video display apparatus according to  claim 10 , wherein
 the synchronizing signal transmitter transmits the first synchronizing signal, the first synchronizing signal, the second synchronizing signal, and the second synchronizing signal in this order, when contents of the first video and contents of the second video are different from each other.   
     
     
         12 . The video display apparatus according to  claim 1 , wherein
 the video includes a first video and a second video,   the display section switchingly displays the first video and the second video with time,   the synchronizing signal generator generates three kinds of the external synchronizing signals for notifying a start of displaying a frame constituting the first video, an end of displaying the frame constituting the first video, a start of displaying a frame constituting the second video, and an end of displaying the frame constituting the second video, and   waveforms of the three kinds of the external synchronizing signals are different from each other.   
     
     
         13 . The video display apparatus according to  claim 12 , wherein
 the three kinds of the external synchronizing signals include a first synchronizing signal for notifying the start of displaying the frame constituting the first video, a second synchronizing signal for notifying the start of displaying the frame constituting the second video, and a third synchronizing signal for notifying the end of displaying the frame constituting the first video and the end of displaying the frame constituting the second video.   
     
     
         14 . The video display apparatus according to  claim 13 , wherein
 the synchronizing signal transmitter transmits the first synchronizing signal, the third synchronizing signal, the second synchronizing signal, and the third synchronizing signal in this order, when contents of the first video and contents of the second video are different from each other.   
     
     
         15 . The video display apparatus according to  claim 13 , wherein
 the synchronizing signal transmitter transmits solely one of the first synchronizing signal, the second synchronizing signal, and the third synchronizing signal, in the case where contents of the first video and contents of the second video are identical to each other, or in the case where the video to be displayed on the display section is constituted solely of the first video.   
     
     
         16 . The video display apparatus according to  claim 1 , wherein
 the video includes a first video and a second video,   the display section switchingly displays the first video and the second video with time,   the synchronizing signal generator generates four kinds of the external synchronizing signals for notifying a start of displaying a frame constituting the first video, an end of displaying the frame constituting the first video, a start of displaying a frame constituting the second video, and an end of displaying the frame constituting the second video, and   waveforms of the four kinds of the external synchronizing signals are different from each other.   
     
     
         17 . The video display apparatus according to  claim 16 , wherein
 the four kinds of the external synchronizing signals include a first synchronizing signal for notifying the start of displaying the frame constituting the first video, a second synchronizing signal for notifying the start of displaying the frame constituting the second video, a third synchronizing signal for notifying the end of displaying the frame constituting the first video, and a fourth synchronizing signal for notifying the end of displaying the frame constituting the second video.   
     
     
         18 . The video display apparatus according to  claim 17 , wherein
 the synchronizing signal transmitter transmits the first synchronizing signal, the third synchronizing signal, the second synchronizing signal, and the fourth synchronizing signal in this order, when contents of the first video and contents of the second video are different from each other.   
     
     
         19 . The video display apparatus according to  claim 17 , wherein
 the synchronizing signal transmitter transmits solely one of the first synchronizing signal, the second synchronizing signal, the third synchronizing signal, and the fourth synchronizing signal, in the case where contents of the first video and contents of the second video are identical to each other, or in the case where the video to be displayed on the display section is constituted solely of the first video.   
     
     
         20 . Video viewing glasses comprising:
 a synchronizing signal receiver for receiving an external synchronizing signal for notifying an end of displaying a frame constituting a video in synchronism with the video;   an optical filter section including a pair of optical filters for adjusting amounts of light to be transmitted to a left eye and a right eye of a viewer, respectively; and   an optical filter controller for controlling the optical filter section based on the external synchronizing signal.   
     
     
         21 . The video viewing glasses according to  claim 20 , wherein
 the optical filter controller controls the optical filter section based on the external synchronizing signal to close one of the optical filters so that both of the optical filters are closed for a predetermined period until the other of the optical filters is opened.   
     
     
         22 . The video viewing glasses according to  claim 21 , further comprising an internal synchronizing signal generator for generating an internal synchronizing signal based on the external synchronizing signal, wherein
 the optical filter controller controls the optical filter section, using the internal synchronizing signal based on the external synchronizing signal.   
     
     
         23 . The video viewing glasses according to  claim 22 , wherein
 the optical filter controller controls the optical filter section to close both of the optical filters for the predetermined period, based on the internal synchronizing signal.   
     
     
         24 . The video viewing glasses according to  claim 22 , wherein
 the optical filter controller controls the optical filter section, based on the internal synchronizing signal and a characteristic of the optical filters.   
     
     
         25 . The video viewing glasses according to  claim 21 , wherein
 the external synchronizing signal includes a first external synchronizing signal and a second external synchronizing signal having waveforms different from each other.   
     
     
         26 . The video viewing glasses according to  claim 25 , wherein
 the optical filter controller controls the optical filter section to close the one of the optical filters based on the first external synchronizing signal upon receiving the first external synchronizing signal by the external synchronizing signal receiver after the one of the optical filters is controlled so as to be opened, and   the optical filter controller controls the optical filter section to close the other of the optical filters based on the second external synchronizing signal upon receiving the second external synchronizing signal by the external synchronizing signal receiver after the other of optical filters is controlled so as to be opened.   
     
     
         27 . The video viewing glasses according to  claim 21 , wherein
 the external synchronizing signal includes a first external synchronizing signal, a second external synchronizing signal, and a third synchronizing signal having waveforms different from each other.   
     
     
         28 . The video viewing glasses according to  claim 27 , wherein
 the optical filter section controls the optical filter section to open the one of the optical filters, based on the first external synchronizing signal,   the optical filter section controls the optical filter section to open the other of the optical filters, based on the second external synchronizing signal, and   the optical filter section controls the optical filter section to close both of the optical filters, based on the third external synchronizing signal.   
     
     
         29 . The video viewing glasses according to  claim 26 , wherein
 the external synchronizing signal receiver receives the external synchronizing signal in the order of the first external synchronizing signal, the third external synchronizing signal, the second external synchronizing signal, and the third external synchronizing signal.   
     
     
         30 . The video viewing glasses according to  claim 21 , wherein
 the external synchronizing signal includes a first external synchronizing signal, a second external synchronizing signal, a third synchronizing signal, and a fourth external synchronizing signal having waveforms different from each other.   
     
     
         31 . The video viewing glasses according to  claim 28 , wherein
 the optical filter section controls the optical filter section to open the one of the optical filters, based on the first external synchronizing signal,   the optical filter section controls the optical filter section to open the other of the optical filters, based on the second external synchronizing signal,   the optical filter section controls the optical filter section to close the one of the optical filters, based on the third external synchronizing signal, and   the optical filter section controls the optical filter section to close the other of the optical filters, based on the fourth external synchronizing signal.   
     
     
         32 . The video viewing glasses according to  claim 31 , wherein
 the external synchronizing signal receiver receives the external synchronizing signal in the order of the first external synchronizing signal, the third external synchronizing signal, the second external synchronizing signal, and the fourth external synchronizing signal.   
     
     
         33 . The video viewing glasses according to  claim 20 , wherein
 the external synchronizing signal includes a plurality of the external synchronizing signals having waveforms different from each other, and   the internal synchronizing signal generator generates the internal synchronizing signal, based on a receiving time interval among the plurality of the external synchronizing signals.   
     
     
         34 . A video system provided with a video display apparatus, and video viewing glasses for use in viewing a video displayed on the video display apparatus,
 the video display apparatus including:
 a display section for displaying a video; 
 a synchronizing signal generator for generating an external synchronizing signal for notifying an end of displaying a frame constituting the video in synchronism with the video; and 
 a synchronizing signal transmitter for transmitting the external synchronizing signal to the video viewing glasses, and 
   the video viewing glasses including:
 a synchronizing signal receiver for receiving the external synchronizing signal; 
 an optical filter section having a pair of optical filters for adjusting amounts of light to be transmitted to a left eye and a right eye of a viewer, respectively; and 
 an optical filter controller for controlling the optical filter section based on the external synchronizing signal.