Commonly used display screens include standard screen (narrow screen) and wide screen, with the aspect ratio of standard screen being 4:3 (or a small ratio being 5:4), and the aspect ratio of wide screen being 16: 10 or 16:9. When the diagonal length is constant, the closer the width-height ratio is to 1, the larger the actual area is.
The height and width are converted according to the size,
22 inch 16: 9 widescreen area ≈133422 mm2 =1334.22 cm2 = 0.133422 flat.
9/ 16=0.5625
Looking up the trigonometric function table, we know: 0.5625≈tan29.3555.
sin29.3555≈0.490227
The height of the monitor is: 22×22×25.4×0.490227≈273.939 mm.
cos29.3555≈0.87 16
The length of the display is: 22× 25.4× 0.8716 ≈ 487.5008 mm.
Extended data
The contrast of the display screen affects the visual imaging effect. High contrast can improve the clarity and bright colors of the picture, and effectively improve the detail texture, clarity and gray level of the image quality. In addition, the contrast also has a certain influence on the resolution conversion of dynamic video. High contrast can make it easier for the naked eye to distinguish the light-dark transition process in dynamic images.
The number of times that the content of LED display screen can be repeatedly displayed per second is called refresh frequency. When the refresh frequency is low, the displayed image will flicker, especially during video shooting. So it is necessary to maximize the refresh frequency to ensure the stability of the display screen.
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