Most LCD monitors offer a setting of 6500 K among their colour temperature options. Some major real-world examples are given below.Ī colour temperature of 6500 K is standard for ordinary PC use and for the sRGB standard. Ideally, due to the need to choose the optimal colour temperature corresponding to individual applications and circumstances, we should be able to adjust colour temperature using Kelvin values. Most offer significantly fewer options in the OSD menu: 5000, 6500, and 9300 K, for example. Some other LCD monitors allow users to designate colour temperature by Kelvin value. For example, on most EIZO LCD monitors, users can choose from about 14 levels (in 500-K intervals from 4000 to 10,000 K, plus 9300 K). It helps to be able to specify precise Kelvin values when we adjust the picture quality of an LCD monitor. While these options make it easier to understand how the eye will sense the colour white, since the user is not given specific Kelvin values, they can be inconvenient when trying to adjust the monitor to a specific colour temperature. If the options for selecting colour temperature are “blue” and “red” or “cool” and “warm,” choose “red” or “warm” to lower the colour temperature and “blue” or “cool” to raise the colour temperature. Some ask users to choose from terms like “blue” and “red” or “cool” and “warm” others ask users to set numerical values like 6500 K or 9300 K. The menu items for adjusting colour temperature vary from product to product. As we would expect, reducing the colour temperature on an LCD monitor gives the entire screen an increasingly reddish cast, while increasing the colour temperature makes the colour cast increasingly blue. Anyone with a deeper interest is encouraged to consult reference works.Īs mentioned in passing at the start of this session, most current LCD monitors allow users to adjust colour temperatures using the OSD menu. While this is a complex topic with detailed explanations grounded in physics and mathematics, we do not need to understand this in depth to adjust the colour temperature of an LCD monitor. For this reason, a black body is an idealized object, used to generate standard values by matching specific colours of radiated light to specific temperatures. ![]() While any object will radiate various light frequencies when heated to high temperature, the temperature at which the light becomes a certain colour differs from object to object. This is how colour temperature is defined. Third, assume that the temperature of the black body when it radiates a certain colour of light is also understood to describe that colour. Second, assume that this black body radiates light when heated and that the wavelength and spectrum of this light varies with the temperature of the black body. This object (an idealized object, not one encountered in reality) is a black body, or perfect radiator. First, assume a subject that can completely absorb heat and light, then radiate this energy back out. Here we’ll touch briefly on the technical definition of colour temperature. Since daylight has a colour temperature of 5000-5500 K, setting the white balance to this figure makes it possible to capture photos with colour reproduction close to that perceived by the eye.Ĭolour is expressed as a temperature due to the relationship between the colour of light and temperatures when objects are heated to high temperatures. Most photographers shooting pictures with digital SLR cameras might set their white balance to 5000-5500 K. As you can probably guess, lower colour temperatures mean redder light, while higher temperatures mean bluer light. The tables below indicate rough colour temperatures for various lighting sources, including sunlight. ![]() While Kelvin is less familiar that Celsius, it should present no problems if we keep the following two basic points in mind: the lower the Kelvin value for colour temperature, the redder a white object appears the higher the colour temperature, the bluer it appears. ![]() Colour temperature is specified in units of Kelvin (K) of absolute temperature, not the degrees Celsius (C) used to express the temperature of air and other materials. Colour temperature refers to the colour of light, serving as the standard index for colour balance for a range of products, including monitors, cameras, and lighting equipment. We’ll start with a brief explanation of the meaning of colour temperature. Since colour temperature settings affect colour reproduction significantly on an LCD monitor, if a user wants to display an image with the appropriate colour cast, he or she must choose the correct colour temperature. Most of today’s LCD monitors feature colour-temperature adjustment options in their OSD menus.
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