公开(公告)号：US5822130A

公开(公告)日：1998-10-13

申请号：US613101

申请日：1996-03-08

申请人： Hiroyuki Nagano ,  Takashi Inoue ,  Kazuo Ueno ,  Shohroh Mochida ,  Shuji Ueda ,  Osamu Adachi

发明人： Hiroyuki Nagano ,  Takashi Inoue ,  Kazuo Ueno ,  Shohroh Mochida ,  Shuji Ueda ,  Osamu Adachi

IPC分类号： H01J9/227 ,  G02B13/08 ,  G03C5/00 ,  G02B41/00

CPC分类号： H01J9/2274 ,  H01J9/2272 ,  H01J9/2273

摘要： Light radiated from a light source is gathered by an oval mirror. The gathered light is incident on one end of a rod-shaped optical integrator, integrated and made uniform within the optical integrator, and is radiated from the other end of the optical integrator. The light from the optical integrator is diffused and projected on an exposure area of a display tube by a lens system. The lens system presents an astigmatism, thereby forming a first virtual focus and a second virtual focus on its virtual image area. The diffused light is apparently diffused vertically at the first virtual focus and apparently diffused horizontally at the second virtual focus. The first vertical focus and the second vertical focus correspond respectively in position to the positions of the vertical deflection means and horizontal deflection means of the display tube. Therefore, the directions of the exposure light beams which shed light on green, blue, and red dots are in agreement with the directions of the deflected electron beams. As a result, the deflected electron beams can sweep over the green, blue, and red dots accurately in synchronization with image signals.

摘要翻译： 从光源辐射的光由椭圆形镜子聚集。 收集的光入射到棒状光学积分器的一端，在光学积分器内整合并均匀，并从光学积分器的另一端辐射。 来自光学积分器的光被透镜系统扩散并投影在显示管的曝光区域上。 透镜系统呈现散光，从而在其虚拟图像区域上形成第一虚拟焦点和第二虚拟焦点。 散射光明显地在第一虚拟焦点处垂直扩散，并且在第二虚拟焦点处明显地水平扩散。 第一垂直焦点和第二垂直焦点分别对应于显示管的垂直偏转装置和水平偏转装置的位置。 因此，在绿色，蓝色和红色点处发光的曝光光束的方向与偏转的电子束的方向一致。 结果，偏转的电子束可以与图像信号同步地精确地扫过绿色，蓝色和红色点。