作业帮请高手帮忙翻译一下,着急啊
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/22 14:13:44
请高手帮忙翻译一下,着急啊
一、点距.
所谓点距就是指同一象素中两个颜色相近的磷光体之间的距离.屏幕是由许多个像素组成,而每个像素又是由红绿蓝三个磷光体组成,因为像素与像素是挨着的,所以相临的像素中相同颜色的磷光体之间的距离就是点距.目前CRT监视器的点距大多为0.22-0.26毫米,而LCD由于其技术与CRT不同,点距多为0.297-0.32毫米.
二、分辨率.
分辨率是一个非常重要的性能指标.它指的是屏幕上水平和垂直方向所能够显示的点数（屏幕上显示的线和面都是由点构成的）的多少,分辨率越高,同一屏幕内能够容纳的信息就越多.对于一台能够支持1280x1024分辨率的CRT来说,无论是320x240还是1280x1024分辨率,都能够比较完美地表现出来（因为电子束可以做弹性调整）.但它的最大分辨率未必是最合适的分辨率,因为如果17寸监视器上到1280x1024分辨率的话,WINDOWS的字体会很小,时间一长眼睛就容易疲劳,所以17寸监视器的最佳分辨率应为1024x768.
但对LCD来说则不然.LCD的最大分辨率就是它的真实分辨率,也就是最佳分辨率.一旦所设定的分辨率小于真实分辨率（比如说15寸LCD,其真实分辨率为1024x768,而WINDOWS中设定分辨率为800x600）的话,将有两种显示方式.一是居中显示,只有LCD中间的800x600个点会显示图象,其他没有用到的点不会发光,保持黑暗背景,看起来画面是居中缩小的.另一种是扩展显示,这种方式会使用到屏幕上每一个像素,但由于像素很容易发生扭曲,所以会对显示效果造成一定影响.
三、刷新率。
对于CRT来讲，屏幕上的图形图像是由一个个因电子束击打而发光的荧光点组成，由于显像管内荧光粉受到电子束击打后发光的时间很短，所以电子束必须不断击打荧光粉使其持续发光。电子枪从屏幕的左上角的第一行（行的多少根据监视器当时的分辨率所决定，比如800X600分辨率下，电子枪就要扫描600行）开始，从左至右逐行扫描，第一行扫描完后再从第二行的最左端开始至第二行的最右端，一直到扫描完整个屏幕后再从屏幕的左上角开始，这时就完成了一次对屏幕的刷新，周而复始。这样我们就能够理解，为什么监视器的分辨率越高，其所能达到的刷新率最大值就越低。一般来讲，屏幕的刷新率要达到75HZ以上，人眼才不易感觉出屏幕的闪烁，CRT监视器的刷新率是由其行频和当时的分辨率决定的，行频越高，同一分辨率下的刷新率就越高；而行频一定的情况下，分辨率越高则它所能达到的刷新率越低。
对于LCD来说则不存在刷新率的问题，它根本就不需要刷新。因为LCD中每个像素都在持续不断地发光，直到不发光的电压改变并被送到控制器中，所以LCD不会有“不断充放电”而引起的闪烁现象。
一、点距.
所谓点距就是指同一象素中两个颜色相近的磷光体之间的距离.屏幕是由许多个像素组成,而每个像素又是由红绿蓝三个磷光体组成,因为像素与像素是挨着的,所以相临的像素中相同颜色的磷光体之间的距离就是点距.目前CRT监视器的点距大多为0.22-0.26毫米,而LCD由于其技术与CRT不同,点距多为0.297-0.32毫米.
二、分辨率.
分辨率是一个非常重要的性能指标.它指的是屏幕上水平和垂直方向所能够显示的点数（屏幕上显示的线和面都是由点构成的）的多少,分辨率越高,同一屏幕内能够容纳的信息就越多.对于一台能够支持1280x1024分辨率的CRT来说,无论是320x240还是1280x1024分辨率,都能够比较完美地表现出来（因为电子束可以做弹性调整）.但它的最大分辨率未必是最合适的分辨率,因为如果17寸监视器上到1280x1024分辨率的话,WINDOWS的字体会很小,时间一长眼睛就容易疲劳,所以17寸监视器的最佳分辨率应为1024x768.
但对LCD来说则不然.LCD的最大分辨率就是它的真实分辨率,也就是最佳分辨率.一旦所设定的分辨率小于真实分辨率（比如说15寸LCD,其真实分辨率为1024x768,而WINDOWS中设定分辨率为800x600）的话,将有两种显示方式.一是居中显示,只有LCD中间的800x600个点会显示图象,其他没有用到的点不会发光,保持黑暗背景,看起来画面是居中缩小的.另一种是扩展显示,这种方式会使用到屏幕上每一个像素,但由于像素很容易发生扭曲,所以会对显示效果造成一定影响.
三、刷新率。
对于CRT来讲，屏幕上的图形图像是由一个个因电子束击打而发光的荧光点组成，由于显像管内荧光粉受到电子束击打后发光的时间很短，所以电子束必须不断击打荧光粉使其持续发光。电子枪从屏幕的左上角的第一行（行的多少根据监视器当时的分辨率所决定，比如800X600分辨率下，电子枪就要扫描600行）开始，从左至右逐行扫描，第一行扫描完后再从第二行的最左端开始至第二行的最右端，一直到扫描完整个屏幕后再从屏幕的左上角开始，这时就完成了一次对屏幕的刷新，周而复始。这样我们就能够理解，为什么监视器的分辨率越高，其所能达到的刷新率最大值就越低。一般来讲，屏幕的刷新率要达到75HZ以上，人眼才不易感觉出屏幕的闪烁，CRT监视器的刷新率是由其行频和当时的分辨率决定的，行频越高，同一分辨率下的刷新率就越高；而行频一定的情况下，分辨率越高则它所能达到的刷新率越低。
对于LCD来说则不存在刷新率的问题，它根本就不需要刷新。因为LCD中每个像素都在持续不断地发光，直到不发光的电压改变并被送到控制器中，所以LCD不会有“不断充放电”而引起的闪烁现象。
呵呵.好长一段.
1. Dot pitch
The so called dot pitch is the distance between two phosphors with similar colors in a pixel. The screen is made of millions of pixels, and each pixel consists of red, blue and green phosphors. Pixels are packed tightly, so the distance between two same color phosphors in different pixels is defined as the dot pitch. Currently, CRT monitors have dot pitches from 0.22 mm to 0.26 mm; LCDs, on the other hand, due to its distinct core technology, have dot pitches from 0.297 mm to 0.32 mm.
2. Resolution
Resolution is one of the most important specifications of a monitor. It is the count of all horizontal and vertical dots (which form lines and areas displayed). A higher resolution contains more information in a unit area. For a CRT that supports 1280X1024 resolution, no matter the resolution is 320X240 or 1280X1024, the display results will be fairly good (due to electron current's elastic tuning effect). However, this CRT's highest resolution isn't necessarily the best in reality. For instance, on a 17 inch monitor, a 1280X1024 resolution makes the font displayed in WINDOWS very small, and thus tires the eye after long period of usage. Therefore, the resolution of a 17 inch monitor should be set to 1024X768.
LCD has a completely different story. LCD's highest resolution is its native, and best resolution. Once a lower resolution is used (for example, when a 15 inch with 1024x768 native resolution is set to 800x600), there will be two display modes. One is center, where only the central parts of the LCD displays the 800x600 image, and the rest of the unused dots will remain dark, making the image look smaller. Another is stretch, which uses all the dots on the display. But since pixels are stretched, the display effects are worse than normal.
1. Dot pitch
The so called dot pitch is the distance between two phosphors with similar colors in a pixel. The screen is made of millions of pixels, and each pixel consists of red, blue and green phosphors. Pixels are packed tightly, so the distance between two same color phosphors in different pixels is defined as the dot pitch. Currently, CRT monitors have dot pitches from 0.22 mm to 0.26 mm; LCDs, on the other hand, due to its distinct core technology, have dot pitches from 0.297 mm to 0.32 mm.
2. Resolution
Resolution is one of the most important specifications of a monitor. It is the count of all horizontal and vertical dots (which form lines and areas displayed). A higher resolution contains more information in a unit area. For a CRT that supports 1280X1024 resolution, no matter the resolution is 320X240 or 1280X1024, the display results will be fairly good (due to electron current's elastic tuning effect). However, this CRT's highest resolution isn't necessarily the best in reality. For instance, on a 17 inch monitor, a 1280X1024 resolution makes the font displayed in WINDOWS very small, and thus tires the eye after long period of usage. Therefore, the resolution of a 17 inch monitor should be set to 1024X768.
LCD has a completely different story. LCD's highest resolution is its native, and best resolution. Once a lower resolution is used (for example, when a 15 inch with 1024x768 native resolution is set to 800x600), there will be two display modes. One is center, where only the central parts of the LCD displays the 800x600 image, and the rest of the unused dots will remain dark, making the image look smaller. Another is stretch, which uses all the dots on the display. But since pixels are stretched, the display effects are worse than normal.