1,1when the length-width ratio of 30 inch curtain ruler is 4:3? It is 2.642m long and 1.98 1 m wide.
When the length-width ratio of 2 130 inch curtain ruler is 16:9, it is 2.878m long and 1.6 19m wide.
3, 130 inch curtain ruler has a length of 3.038m and a width of 1.294m when the length-width ratio is 2.35: 1.
Extended data:
aspect ratio
The aspect ratio of the projection screen directly affects the picture quality. Only when the aspect ratio of the projection screen completely matches the natural resolution of the projector and the resolution (resolution) of the signal source will the display screen be more exciting. The aspect ratio of the projection screen mainly includes the following contents:
1.33: 1 (4: 3), mainly video /PC images, diagonal x 0.8 width;
1.78:1(16: 9), mainly for HDTV;
1.85: 1, mainly for widescreen TV signal images;
2.35: 1, mainly used for widescreen stereoscopic image display.
At present, the most commonly used video images are 4: 3 and 16: 9. You can choose which screen ratio to use according to the display ratio of your machine.
contrast
Contrast is very important for the uniformity and resolution of the picture, which mainly refers to the ratio of high-level and low-level, and in layman's terms, it is the ratio of bright areas and dark areas of the picture. High contrast screen is very important for the hierarchical display of the picture.
Baidu encyclopedia-projection curtain