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An LCD technology is dynamic contrast (DC), also called advanced contrast ratio (ACR), and smart contrast ratio (SCR [4]) and various other designations.When there is a need to display a dark image, a display that supports dynamic contrast underpowers the backlight lamp (or decreases the aperture of the projector's lens using an iris), but proportionately amplifies the transmission through the ...
This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices. The luminance contrast (ratio), CR, is a dimensionless number , often indicated by adding ":1" to the value of the quotient (e.g. CR = 900:1).
Static contrast ratio Typical 200–300:1 [1] [2] 150 to 8,100:1 ... Sensitive to ambient magnetic fields, which can adversely affect convergence and color purity.
The maximum contrast of an image is termed the contrast ratio or dynamic range. In images where the contrast ratio approaches the maximum possible for the medium, there is a conservation of contrast. In such cases, increasing contrast in certain parts of the image will necessarily result in a decrease in contrast elsewhere.
With LCD screens, some manufacturers have opted to measure the contrast ratio and report the viewing angle as the angle where the contrast ratio exceeds 5:1 or 10:1, giving minimally acceptable viewing conditions. The viewing angle is measured from one direction to the opposite, giving a maximum of 180° for a flat, one-sided screen.
High contrast ratio: 137/313: The latest panel from IPS Alpha Technology with a wider color gamut [quantify] and contrast ratio [quantify] matching PVA and ASV displays without off-angle glowing. [citation needed] IPS alpha: IPS-Pro: 2008: High contrast ratio: Next generation of IPS-Pro IPS alpha next gen: IPS-Pro: 2010: High contrast ratio
Brightness and contrast ratio: Contrast ratio is the ratio of the brightness of a full-on pixel to a full-off pixel. The LCD itself is only a light valve and does not generate light; the light comes from a backlight that is either fluorescent or a set of LEDs .
Therefore the contrast ratio is as follows: contrast ratio = antilog (2.0 — 0.3) = antilog (1.7) = 50 Therefore contrast ratio = 50 : 1 (50 to 1). When applied to the negative film version of the same test card, the maximum density is 1.30 although the minimum density remains at 0.30. The contrast ratio of the negative is therefore as follows ...