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December 11, 2015

What is a NIT?

A NIT is a measurement of light in candelas per meter square (Cd/m2) For an LCD monitor it is brightness out of the front panel of the display. A NIT is a good basic reference when comparing brightness from monitor to monitor. Most desktop LCD’s or Notebook LCD’s have a brightness of 200 to 250…

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December 11, 2015

What is Luminance?

Luminance is the scientific term for “Photopic Brightness” which specifies the visual brightness of an object. In layman’s terms, it is commonly referred to as “brightness”. Luminance is specified in candelas per square meter (Cd/m2) or nits. In the US, the British unit Foot-lamberts (fL) is also frequently used. To convert from fL to nits,…

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December 11, 2015

What is Contrast Ratio (CR)?

Contrast ratio (CR) is the ratio of luminance between the brightest “white” and the darkest “black” that can be produced on a display. CR is another influence of perceived picture quality. If a picture has high CR, you will consider it to be sharper and crisper than a picture with lower CR. For example, a…

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December 11, 2015

How do I know how many NIT’s I require for my application?

Applications will vary depending on the location of the LCD and how much ambient light is available that could cause the display to become washed out or unreadable. As a rule of thumb; notebooks and desktop LCD’s which are generally used in office light conditions are in the 200-250 nit range. For indoor use with…

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December 11, 2015

What is considered a true sunlight readable or outdoor readable LCD?

First, the display screen on a sunlight readable/outdoor readable LCD should be bright enough so that the display is visible in direct or strong sunlight. Second, the display contrast ratio must be maintained at 5 to 1 or higher. Although a display with less than 500 nits screen brightness and a mere 2 to 1…

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December 11, 2015

Are there thermal management issues with sunlight readable LCD’s?

Yes -any high brightness backlight system will consume a significant amount of power, thereby increasing the LCD temperature. The brighter the backlight, the greater the thermal issue. As well, if the LCD is used under direct sunlight additional heat will be generated as a result of sunlight exposure. Temperature issues have been handled through proper…

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