LCD TV and Plasma: Size, inches, resolution, viewing angle, response time, brightness and contrast ratio
ByThe format refers to screen size, which corresponds to what the diagonal and is conventionally expressed in inches
The TV screen HDTV from 14 “LCD, although there are smaller screens but are intended to TV, DVD players and other devices-DivX strictly portable.Typically over 35 “are found only plasma televisions, which can exceed 50″ in this case the high prices certainly does not make them accessible to the consumer market. Although their size, the proportion exceeding 127 cm of the 50 “are not easily compatible with the spaces household.
Referring to the television, the term also indicates the format is television format, consisting of two numbers indicating the width and height of the screen ratio. For 4:3 and 16:9, however, is dedicated to one of the following chapters.
The resolution is measured and expressed in pixels and describes the ability to show the greatest number of pixels on the screen either horizontally or vertically and is given the number of horizontal pixels x number of vertical pixels.
We must not fall into the high resolution that will promote the best image definition as it increases the resolution decreases the size of them.
The format of the screen and its resolution must be compensated to avoid display problems, so it comes to optimal resolution, also given by the pitch between the pixels. Measured in millimeters, the pace is lower than most images are well defined.
The viewing angle denotes the angle range in which the display is within acceptable limits such good performance of the frontal view, adequate brightness and contrast ratios 5:1, that is the maximum viewing angle in which one screen is visible observer.
Normally an LCD screen has a horizontal and vertical viewing angle that is around 170 degrees.
The formula cd / m², which seems mysterious to many, is the ratio of candelas per square meter and refers to the brightness criterion that designates the brilliance of the colors. Low values of brightness are not appropriate because the images would fade and the colors very vivid.
It is true that the technical data of plasma televisions appear very high values of brightness (eg 1300 cd / m² against 500 cd / m² of a LCD TV), but the nominal quantity does not always make a real difference, both that LCD televisions with 450-550 cd / m² brightness often emit a higher plasma TV that transcend 1200-1300 cd / m².
Finally, the report focuses on the contrast between light transmission of light pixels and dark pixels, then between the lighter colors and darker colors that the screen can display.
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