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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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December 11, 2015

What is Dot Pitch or Pixel Pitch?

The dot pitch specification for a display monitor tells you how sharp the displayed image can be. The dot pitch is measured in millimeters (mm) and a smaller number means a sharper image. In desk top monitors, common dot pitches are .31mm, .28mm, .27mm, .26mm, and .25mm. Personal computer users will usually want a .28mm…

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December 11, 2015

What is a Viewing Angle and why does it matter?

The viewing angle is the angle at which the image quality of an LCD degrades and becomes unacceptable for the intended application. Viewing angles are usually quoted in horizontal and vertical degrees with importance dependent on the specific application. As the observer physically moves to the sides of the LCD, the images will degrade in…

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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,…