DVST 和 CRT 的区别

1. 阴极射线管(CRT)：
CRT 就像一个真空玻璃管。真空管的一端装有电子枪，真空管的另一端装有屏幕，屏幕上涂有点图案，也可以说是磷晶体。磷发出的光会很快从屏幕上消失。为了在屏幕上保持图像更长时间，电子束在相同点上非常快速地重新定向。因此，屏幕上的磷晶体会持续发光。这种类型的 CRT 也称为刷新型 CRT。

CRT 中使用的各种组件是：

1. 电子枪
2. 调焦系统
3. 偏转系统
4. 磷涂层屏幕。

2. 直视存储管(DVST)：
由于具有绘制和显示图像的特性，DVST 与 CRT 相似。它使用电子枪绘制图像并使用磷涂层屏幕显示图像。磷的使用具有高持久性。为了存储图像的定义，它不使用刷新缓冲区或帧缓冲区。在这种情况下，图像的定义以正电荷分布的形式存储在 CRT 中。由于这个原因，它也被称为存储型 CRT。在此不使用刷新，因为 DVST 上的哪张图片在褪色前只能看到 40-50 分钟。

DVST 中使用的各种组件是：

1. 电子枪
2. 磷涂层筛网
3. 强力网
4. 集电极

DVST 和 CRT 的区别：

Sr. No.	Basis	CRT	DVST
1.	Use of Refresh Buffer	To store the picture definition, it uses refresh or frame buffer.	To store the picture definition, it uses grid which is called as storage mesh.
2.	Form of storage of picture definition	It stores the picture definition in the form of intensity values for different points on the screen.	It stores the picture definition in the form of positive charge distribution on storage mesh.
3.	Refreshing	Refreshing is required.	No refreshing is required.
4.	Colors Produced	It display wide range of colors.	It does not display colors.
5.	Use of Electron guns	It uses three electron guns i.e., Red, Green and Blue.	It uses two electron guns i.e., primary and flood gun.
6.	Flickering	In this the problem of flickering is observed; if the persistence of phosphor and refresh rate does not match.	In this there is no problem of flickering is observed.
7.	Modification of picture	In this the user can modify the particular portion of picture at any time.	In this the user cannot modify the particular portion of picture at any time. For modification, entire picture must be erased and redrawn.
8.	Use of Collector mesh	To control the flow of electrons, it does not use collector mesh.	To control the flow of electrons, it uses collector mesh.
9.	Application	CRT is widely used to display animations, realistic scenes and graphics etc.	DVST is only used for the line drawing applications.