Views: 0 Author: Site Editor Publish Time: 2022-08-03 Origin: Site
As a visual tool in a digital color device, LCD Monitor play an irreplaceable role.With the development of modern electronic technology, the color performance of the display is continuously improved, which can simulate the real effect of the scene.Not only that, with the development of network technology, color images as an information carrier have attracted more and more attention, and people have higher and higher requirements for the visual effects of graphic images.Display is an input and output device in a computer system and an important part of an image processing system.The display effect of its color directly affects the reproduction quality of the color image.Therefore, it is also necessary to analyze and study the color characteristics of displays in the field of image processing.With its thin and light body, low energy consumption, low radiation and other characteristics, LCD MonitorIt is not only widely used in the field of office, but also widely used in the field of professional image processing and design.As technology develops, the trend to eventually replace CRT monitors is unstoppable.
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Importance and Status Parameters of Monitor Calibration
Main parameters for evaluating display performance
The LCD display is a window into the world of digital color, providing the easiest way to view color and graphic images.However, the degree of color reproduction of the monitor will change over time, so the monitor should be calibrated and debugged regularly during use; the monitor used for graphic image color processing and screen soft proofing should comply with ISO standards.Perform periodic calibration to ensure that the color display is as accurate and true as possible.Before the liquid crystal display is calibrated, its working state must be adjusted.As a color expression tool, each primary color light quantity of the display has a certain brightness range (dynamic density range), the hue relationship of brightness expression, and the maximum brightness formed by mixing.The photometric and chromatic characteristics of bright white (called white point), the specific measurable performance indicators are:
(1) The brightness of the white point of the liquid crystal display: that is, the brightness of the white light formed by the mixture of the maximum light intensities of red, green and blue, usually expressed in the unit of luminosity 'candela/square meter';
(2) White point of color displayed by LCD: expressed in color temperature, the unit is Kelvin, usually set to the color temperature of standard light source D65.
(3) LCD display Gamma coefficient: expressed in gamma value.By adjusting these three main performance indicators, the working state of the monitor can be changed to achieve an ideal color display effect.
The ISO 12646 international standard specifies the relevant standards for the performance of professional image processing liquid crystal displays.These include display uniformity, focus performance, refresh rate, color, resolution, brightness, and more.
(1) Display uniformity index: When displaying a uniform white, black or color image, the display should be visually uniform; that is, the brightness difference of all measurement points on the liquid crystal display relative to the center point should be within 5%, at least within 10% , there should be no apparent visual inhomogeneity in these areas.
(2) Accuracy of displayed colors: There are tens of thousands of colors in nature, which are very rich. Each display device expresses colors according to its own color space and corresponding medium, so the displayed colors may deviate from the real scene.
(3) Display color gamut range: It refers to the range area formed by the number of colors that can be expressed by a liquid crystal display, and also refers to the color range that a specific medium can express.
The above is the relevant content about the introduction of liquid crystal display.If you are interested in LCD monitors, you can contact us.Our website is www.smartboardfactory.com.
