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Sometimes People would be confused by so many parameters of digital frames, such as digital drame brightness Feature, just same to buy LCD Displays, the main parameters of liquid crystal display are: screen size, display resolution, contrast, brightness, viewing angle, this guidence detailed the digital frame brightness parameters, and let you know which one is your best choice.
The maximum image brightness of a digital photo frame is measured in candelas per square metre (cd/mē), and a typical value for a digital picture frames is 200cd/mē. A higher figure is generally better, but this is not the sole indication of image quality. The higher the brightness, the image effect will be clear, can see the details of the more. All LCD's brightness is generally in the 250 cd / m2 (lumens), the LCD's brightness is higher than most of the brightness!
Brightness or luminance--typically expressed in candelas per square meter (cd/m2)--is at least as important to many LCD buyers as contrast ratio. Vendors measure contrast ratio using full-white and full-black screens.
According to TCO’03/TCO’99 and ISO 13406, the minimum required brightness levels for LCD
monitors are 150 cd/m2 and 100 cd/m2 respectively. This standard was based on an
eye-to-monitor distance of 50 cm, and zero degree ambient light.
Recently however, different usage scenarios have emerged wherein ambient light and viewing
distance are quite varied. With this in mind, Acer now offers LCDs with varying brightness, each
designed for the specific usage scenarios described below:
Public areas (department stores, hospitals, transit stations)
• High-level brightness LCDs (300 cd/m2 and above) are recommended to suit higher
ambient light and viewing distances of around 100 cm.
Offices
• Mid-level brightness LCDs (250cd/m2 to 300 cd/m2) are recommended for normal ambient
light and viewing distances of around 60 cm.
Study rooms
• Low-level brightness LCDs (200cd/m2 to 250cd/m2) are recommended for lower ambient
light (e.g. desk lamp) and distances of around 50 cm.
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