公开(公告)号：US5946519A

公开(公告)日：1999-08-31

申请号：US912626

申请日：1997-08-18

Applicant: Chih-Chien Chao ,  Chun-Hsiung Yen ,  Ying-Hung Chuang ,  Keh-Chung Su

Inventor： Chih-Chien Chao ,  Chun-Hsiung Yen ,  Ying-Hung Chuang ,  Keh-Chung Su

IPC: H01J9/227 ,  G03B41/00 ,  H01J29/12

CPC classification number: H01J9/2272

Abstract: Apparatus for use as a lighthouse in the manufacture of a color cathode ray tube (CRT) includes a housing with a cover lens. Disposed within the housing is a light source assembly including a light source in the form of a cylindrical shaped mercury lamp and an optical aperture closely spaced to the mercury lamp. The mercury lamp directs light through the optical aperture as well as through the cover lens onto the inner surface of the CRT's glass faceplate in a photo-stenciling process for registering, or aligning, phosphor dots on the faceplate's inner surface with electron beam passing apertures in the CRT's color selection electrode, or shadow mask. The optical aperture is elongated, with its longitudinal axis aligned generally transverse to the longitudinal axis of the mercury lamp, and is curvilinear having from two (2) to eight (8) inflection points along its length. The inflection points of the optical aperture, or the points along its length where it undergoes a slope reversal, direct the light beam through the shadow mask apertures and onto the CRT's faceplate in a manner which closely simulates electron beam trajectories under the influence of a self-convergent magnetic deflection yoke to correct for residual misregistration errors arising from the use of the self-convergent magnetic deflection yoke in the CRT. The unique shape of the optical aperture also reduces registration sensitivity of the light beam directed onto the faceplate, thus relaxing alignment tolerances and assembly precision of the light source and associated components.

Abstract translation: 在彩色阴极射线管（CRT）的制造中用作灯塔的装置包括具有盖透镜的壳体。 设置在壳体内的是包括圆柱形汞灯形式的光源和与汞灯紧密分开的光学孔的光源组件。 水银灯通过光学孔径以及通过盖子透镜将光通过光掩模过程引导到CRT玻璃面板的内表面上，用于在面板内表面上配准或对准荧光点，电子束通过孔 CRT的选色电极或荫罩。 光学孔是细长的，其纵向轴线大致横向于水银灯的纵向轴线，并且是曲线的，沿其长度具有两个（2）至八个（8）拐点。 光学孔径的拐点或其沿着其长度的点经历斜率反转，将光束通过阴影掩模孔并以其自身的影响紧密地模拟电子束轨迹的方式引导到CRT的面板上 - 会聚磁偏转线圈，用于校正在CRT中使用自会聚磁偏转线圈引起的残留对准误差。 光学孔径的独特形状也降低了被引导到面板上的光束的配准灵敏度，从而减轻了光源及相关组件的对准公差和组装精度。