Sunlight readable screens have two core advantages over their non-sunlight readable alternative. As of 2014, they cost up to 50% more than their equivalent model, but this is more than offset by their improved general durability and the fact that screen is purpose built to operate without impaired performance in bright conditions. The larger the screen, the more difficult it is to maintain optimum conditions and so within this frame the technology is becoming ever more sophisticated. Overall, the functionality of high brightness monitors is assessed according to two principal factors.
Luminance:
This is a physical term which measures which measures the intensity of light emitted from a flat surface (such as nec monitors) per unit area of light in a particular direction. The unit used to quantify luminance is the candela per metre squared (cd/m2from devices such as nec touch screen monitors will be detected by the eye when it responds to the light emitted from the screen at a given angle. In other words, luminance is a function of how bright the surface will appear to a person and not necessarily how much light is being emitted. The sun has a luminance number of 1.6 X 109 cd/m2 the laptop used to write this article has a luminance of between 400 and 500 cd/m2 monitor will have a luminance rating of at least three times this figure but are often rated as having a luminance of several thousand cd/m2.
High Contrast Ratio
Perhaps surprisingly there is no accepted standard way of measuring the contrast ratio. This is because it will depend on the environment in which the screen is being viewed. The contrast ratio measures the ratio of the brightest light (which is white light) to the darkest light (which is black light) that the screen will produce. The contrast ratio measures the maximum extremes that a given range of high brightness screens will produce when they are in operation. In an ideal situation only the light emitted from the screen is visible (such as happens in the cinema), where the contrast ratio of the device is the same as the contrast ratio of the image. In most situations is reflected from the external environment into the monitor screen, which lowers the contrast ratio on the screen.
So, sunlight readable monitors function by maintaining the maximum possible contrast ratio under a given set of conditions. In other words for all digital signage display monitors the maximum possible ratio is required for all points on the screen. This will produce images of the appropriate quality and clarity. The movement of display screens from dark to light rooms causes the contrast ratio to fall from several hundred (or even thousand), units down to single figure numbers. High brightness screens function by accommodating changes in luminance relative to external light parameters with no demonstrable reduction in image quality.
www.pixelution.co.uk
Luminance:
This is a physical term which measures which measures the intensity of light emitted from a flat surface (such as nec monitors) per unit area of light in a particular direction. The unit used to quantify luminance is the candela per metre squared (cd/m2from devices such as nec touch screen monitors will be detected by the eye when it responds to the light emitted from the screen at a given angle. In other words, luminance is a function of how bright the surface will appear to a person and not necessarily how much light is being emitted. The sun has a luminance number of 1.6 X 109 cd/m2 the laptop used to write this article has a luminance of between 400 and 500 cd/m2 monitor will have a luminance rating of at least three times this figure but are often rated as having a luminance of several thousand cd/m2.
High Contrast Ratio
Perhaps surprisingly there is no accepted standard way of measuring the contrast ratio. This is because it will depend on the environment in which the screen is being viewed. The contrast ratio measures the ratio of the brightest light (which is white light) to the darkest light (which is black light) that the screen will produce. The contrast ratio measures the maximum extremes that a given range of high brightness screens will produce when they are in operation. In an ideal situation only the light emitted from the screen is visible (such as happens in the cinema), where the contrast ratio of the device is the same as the contrast ratio of the image. In most situations is reflected from the external environment into the monitor screen, which lowers the contrast ratio on the screen.
So, sunlight readable monitors function by maintaining the maximum possible contrast ratio under a given set of conditions. In other words for all digital signage display monitors the maximum possible ratio is required for all points on the screen. This will produce images of the appropriate quality and clarity. The movement of display screens from dark to light rooms causes the contrast ratio to fall from several hundred (or even thousand), units down to single figure numbers. High brightness screens function by accommodating changes in luminance relative to external light parameters with no demonstrable reduction in image quality.
www.pixelution.co.uk