How is the brightness of LCD segment code screen defined?

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How is the brightness of LCD segment code screen defined? [Copy link]

LCD segment screen brightness is an indicator of display clarity. Passive display LCDs are expressed in contrast, generally 5:1~20:1, while active light-emitting displays such as PDP, OLED, etc. are expressed in brightness, generally 100nt~300nt. LCDs with added backlights can also be expressed in brightness, and generally the brightness will not exceed 250nt. If power consumption is not considered, adding more backlight tubes can also achieve more than 400nt, and the contrast ratio reaches 100:1. Active light-emitting displays can easily reach more than 800nt, and the contrast ratio can reach more than 500:1.

In addition, LCD display is similar to writing black words on gray paper. No matter how high the contrast is, the display effect is not as good as the electrophoretic display or the black words on white paper of electronic ink.

Therefore, whether from the brightness index with backlight or the contrast index of reflective display without backlight, LCD display is at a disadvantage.

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