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    • 2. 发明公开
    • Cathode ray tube display apparatus
    • Kathodenstrahlrohr-Bildwiedergabevorrichtung。
    • EP0557053A1
    • 1993-08-25
    • EP93301109.0
    • 1993-02-16
    • International Business Machines Corporation
    • Beanlands, PeterBeeteson, John S.Sawdon, David
    • H04N3/223G09G1/04H04N5/63
    • H04N3/223G09G1/04H02M2001/0032H04N5/63Y02B70/16
    • This specification concerns cathode ray tube display apparatus comprises a cathode ray tube display screen (10). A beam generator (60,30) is provided for generating at least one electron beam in the cathode ray tube display screen (10) to produce a video image. Also provided is a line timebase circuit (40) for generating a line deflection signal to sequentially address the or each electron beam to successive pixels on the screen (10) in a line of a raster, and a frame timebase circuit (50) for generating an alternating frame deflection signal for sequentially addressing the or each electron beam to successive lines of the raster. The apparatus further comprises a standby circuit (110) connected to the line and frame timebase circuits (40,50). The standby circuit (40,50) switches the deflection signals generated by the timebase circuits (40,50) between first predetermined amplitudes and second predetermined amplitudes, less than the first predetermined amplitudes, in response to a control input (100) switching between first and second predetermined states. Because the amplitudes of the deflection signals are reduced when the display is configured to operate in standby mode, both the power dissipated by, and the stray electric and magnetic fields radiating from the display can be significantly reduced during periods of temporary non-use.
    • 本说明书涉及阴极射线管显示装置,包括阴极射线管显示屏(10)。 提供了一种光束发生器(60,30),用于在阴极射线管显示屏(10)中产生至少一个电子束,以产生视频图像。 还提供了一种线时基电路(40),用于产生线偏转信号,以顺序地将该电子束或每个电子束寻址到栅格(10)上的一行光栅中的连续像素;以及帧时基电路(50),用于产生 交替的帧偏转信号,用于顺序地将该电子束或每个电子束寻址到光栅的连续行。 该装置还包括连接到线路和帧时基电路(40,50)的备用电路(110)。 备用电路(40,50)响应于控制输入(100)在第一预定振幅和第二预定幅度之间切换,在第一预定幅度和小于第一预定幅度的第二预定幅度之间切换由时基电路(40,50)产生的偏转信号 和第二预定状态。 因为当显示器被配置为在待机模式下工作时,偏转信号的振幅减小,所以在临时不使用期间,从显示器辐射的杂散电场和磁场两者都能够显着地减少。