先决条件 – 刷新型输出设备
1. 光束穿透法：
射束穿透法与普通 CRT 非常相似，它只使用一个电子枪。在这种情况下，屏幕的内表面涂有不同颜色的多层，通常涂有两层磷，即红色和绿色。它是一种用于显示已与随机扫描监视器一起使用的彩色图片的方法。
2. 阴影遮罩法：
阴影遮罩方法是用于光栅扫描系统的方法，包括彩色电视。在这种情况下，像素由三种颜色组成。因此，由于三种颜色，它使用三个电子枪来产生每种颜色。颜色是红色、绿色和蓝色。在这方面，彩色监视器的重要考虑因素是电子枪的设置和形成像素的荧光点。
光束穿透和阴影遮罩的区别：
| Sr. No. | Basis | Beam Penetration | Shadow Mask |
|---|---|---|---|
| 1. | Colors produced | In this method, there is the production of only four colors i.e., red, green, yellow, orange. | In this method, there is the production of millions of colors. |
| 2. | Color dependency | As in this method only four colors are produced it is because of the speed of the electron gun. | As in this method millions of colors are produced because it depends upon the intensity value of the three available guns. |
| 3. | Number of electron guns used. | In this method, only one electron gun is used. | In this methods, three electron guns are used; i.e red, green and blue. |
| 4. | Picture quality | As we know in this different colors and shades are not possible. So, it’s picture quality is poor. | As we know in this different colors and shades are possible. So, it’s picture quality is quite good. |
| 5. | Realistic view | This method is not suitable for providing the realistic view. | This method is suitable for providing the realistic view. |
| 6. | Resolution | This method provides high resolution. | Whereas, this method does not able to provide high resolution. |
| 7. | Cost | It is cheaper than shadow mask method. | It is an expensive method. |
| 8. | Application | It is used in random scan system to display color. | It is used in raster scan system to display color. |