公开(公告)号：US06926412B2

公开(公告)日：2005-08-09

申请号：US10730036

申请日：2003-12-09

申请人： Sung-gi Kim ,  Seok-il Yoon ,  Suk-sun Lee

发明人： Sung-gi Kim ,  Seok-il Yoon ,  Suk-sun Lee

IPC分类号： G02B3/08 ,  G02F1/1335 ,  G03B21/10 ,  G03B21/26 ,  G03B21/62 ,  G03B21/625 ,  H04N5/74 ,  G03B21/56 ,  G03B21/60 ,  H04N9/31

CPC分类号： G03B21/26

摘要： A projection display apparatus with red (R), green (G), and blue (B) monochromatic cathode ray tubes (CRTs) and three projection lenses, disposed in front of the R, G, and B monochromatic CRTs respectively, along with a screen having a predetermined curvature concave in a view direction to control a view distance and focus the light rays projected from the respective projection lenses. The screen includes a Fresnel screen converting the light rays incident from the projection lenses to have predetermined optical directional characteristics in an optical axis direction, and a Lenticular screen, disposed in front of the Fresnel screen and having a curvature corresponding to the Fresnel screen, for forming images from the light rays passing through the Fresnel screen, controlling a view angle, and enhancing an entire screen luminance. The view distance is determined based on a focal length and a curvature radius of the Fresnel screen.

摘要翻译： 分别设置在R，G和B单色CRT前面的具有红色（R），绿色（G）和蓝色（B）单色阴极射线管（CRT）和三个投影透镜的投影显示装置，以及 屏幕具有在观察方向上凹入的预定曲率，以控制视距，并聚焦从各个投影透镜投射的光线。 屏幕包括：菲涅尔屏幕，其将从投影透镜入射的光线转换为在光轴方向上具有预定的光学方向特性;以及透镜屏幕，设置在菲涅尔屏幕的前面并具有对应于菲涅尔屏幕的曲率，用于 从通过菲涅尔屏幕的光线形成图像，控制视角，并提高整个屏幕亮度。 基于菲涅尔屏幕的焦距和曲率半径来确定视距。

公开(公告)号：US20050018286A1

公开(公告)日：2005-01-27

申请号：US10874700

申请日：2004-06-24

申请人： Seok-il Yoon ,  Sung-gi Kim ,  Gyu-hwan Hwang

发明人： Seok-il Yoon ,  Sung-gi Kim ,  Gyu-hwan Hwang

IPC分类号： G02B3/08 ,  G03B21/10 ,  G03B21/62 ,  G03B21/625 ,  G03G21/10 ,  H04N5/74 ,  H04N9/31 ,  G03B21/60

CPC分类号： G02B3/08 ,  G03B21/602 ,  H04N9/31 ,  H04N9/3141

摘要： Provided is an image display screen having wide horizontal and vertical viewing angles and a projection television including the same. The image display screen includes a Fresnel screen, a first lenticular screen that widens a horizontal viewing angle and a second lenticular screen including a first portion that widens a vertical viewing angle and a second portion that prevents degradation of contrast due to external light, and a protective screen. The second lenticular screen and the protective screen can be replaced by an integrated screen or a composite screen having the characteristics of both. In addition, a pattern may be formed on the rear surface of the Fresnel screen to perform the same function as the first portion.

摘要翻译： 提供了具有宽的水平和垂直视角的图像显示屏幕和包括其的投影电视机。 图像显示屏幕包括菲涅耳屏幕，第一透镜屏幕，其加宽水平视角，第二透镜屏幕包括加宽垂直视角的第一部分和防止由外部光引起的对比度降低的第二部分，以及 屏障。 第二透镜屏和保护屏可以由具有两者特征的集成屏或复合屏替代。 此外，可以在菲涅尔屏幕的后表面上形成图案以执行与第一部分相同的功能。

公开(公告)号：US06559272B1

公开(公告)日：2003-05-06

申请号：US10057386

申请日：2002-01-24

申请人： Jae-Young Jeon ,  Yoon-Hee Hong ,  Sung-Gi Kim

发明人： Jae-Young Jeon ,  Yoon-Hee Hong ,  Sung-Gi Kim

IPC分类号： C08G6378

CPC分类号： C08G63/85 ,  C08G63/181 ,  C08K5/49

摘要： Disclosed is a method for preparing polyester resins copolymerized with glycol for modification such as 1,4-cyclohexanedimethanol, in which the content of said glycol ingredient for modification ranges from 20 to 80 mol % of the total glycol content. Dicarboxylic acid such as terephthalic acid is esterified with ethylene glycol and said glycol for modification. The esterification product is subjected to polycondensation in the presence of a titanium dioxide/silicon dioxide coprecipitate catalyst, said catalyst being in the form of 4% or less strength by weight suspension in glycol. The copolyester prepared as above shows excellent transparency and color properties in addition to being produced at high efficiency.

摘要翻译： 公开了一种用于制备与乙二醇共聚的聚酯树脂的方法，例如1,4-环己烷二甲醇，其中所述改性二醇成分的含量为总二醇含量的20至80摩尔％。 二羧酸如对苯二甲酸用乙二醇酯化，所述二醇用于改性。 酯化产物在二氧化钛/二氧化硅共沉淀催化剂存在下进行缩聚，所述催化剂为乙二醇悬浮液中4重量％以下的重量。 如上制备的共聚聚酯除了高效生产之外还显示出优异的透明性和着色性。