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    • 3. 发明授权
    • Cathode ray tube apparatus
    • 阴极射线管装置
    • US5552663A
    • 1996-09-03
    • US310325
    • 1994-09-22
    • Koichi IidaMichihisa Yano
    • Koichi IidaMichihisa Yano
    • H01J29/86H01J31/10H01J29/18
    • H01J29/861H01J2229/8616
    • The present invention enlarges the effective display area of a CRT for projecting while maintaining the strength of the panel necessary to allow for normal usage without breaking. The inside portion of the effective display area inside the rectangular display area is of a predetermined radius, and protrudes inward, extending in all directions. The four corners of the display area are outside of the circular boundary line comprised of the standard thickness Tf. Non-display areas H which are outside the boundary line are flat or protuberant, and have a thickness greater than the standard thickness Tf. Accordingly, with the present invention, the effective display area A2 can be made larger than previous effective display areas A1 in the prior art, which could not extend beyond a border that included the four corners, while maintaining overall the necessary strength.
    • 本发明在保持需要的面板的强度而不破坏的情况下扩大用于投影的CRT的有效显示区域。 矩形显示区域内的有效显示区域的内部部分是预定的半径,并向内突出,在所有方向上延伸。 显示区域的四个角落在由标准厚度Tf组成的圆形边界线之外。 在边界线之外的非显示区域H是平坦的或突出的,并且具有大于标准厚度Tf的厚度。 因此,利用本发明,可以使有效显示区域A2大于现有技术中的先前有效显示区域A1,其不能超过包括四个角的边界,同时保持总体必要的强度。