2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-09 13:15
TV manufacturers with each new model released declare its improved features and functions. One of these parameters is the contrast of the TV. Its various types, advantages and disadvantages are difficult for an ordinary buyer of equipment to perceive, and therefore it is important to find out how important it is for viewing, and which type is preferable.
What is TV Contrast?
Today, television is a source of information that everyone perceives visually and through their hearing aids. Contrast is an important parameter of image quality, which means that it will depend on it how well information will be visually conveyed to a person . Designating this parameter, the manufacturer shows how many times the lightest point in the image is brighter than the darkest one.
Note that today these rates fluctuate and are designated as 4500: 1, 1200: 1, etc . There are models with indicators over 30,000: 1, however, such an eye contrast does not catch, and therefore an expensive TV with this parameter will not differ from its more budgetary competitor. In addition, the characteristic cannot be measured with improvised means, and manufacturers often indicate incorrect overestimated values, thereby attracting buyers.
It should also be noted that not every TV user needs a high level of performance … So, preferential viewing during the day does not require high numerical values of the parameter from the TV, in contrast to evening screenings of films with a large number of dark scenes. Good contrast in the latter case allows you to notice all penumbra and silhouettes, to see the black palette in all its diversity.
Display technology is responsible for contrast. In the case of an LCD display, this parameter is determined by the liquid crystal panel . Today, well-known equipment manufacturers have found several ways to increase the numerical value of the parameter. The main way to achieve this goal is to use LED sources, which are edge (side) illumination. The brightness of each LED can vary depending on the displayed image, making it as contrasting as possible and close to reality.
Despite the fact that this alternative method does not relate to the pixel level and works zonal, the result is pleasing to the eye in every sense.
Views
Today, there are two types of contrast widely advertised by marketers.
Dynamic
Dynamic Contrast Ratio is now an extended term for the TV's ability to overstate static contrast ratios. A TV equipped with this function is able to adjust the total luminous flux directed to the image in real time . For example, in a dark scene, the black level increases significantly. This process resembles manual contrast change, however, it is more advanced and does not require any human action.
Despite such "smart" developments in relation to televisions, in reality everything seems a little different. If the backlight of the LCD display shows the maximum brightness value of the light tones, then the black palette becomes insufficient . If the backlight level is set to a minimum, the black palette will contrast favorably, however, lighter shades will show a low level of contrast.
In general, such a development takes place, however, when buying, you should not chase the extended level of dynamic contrast, giving preference to the static parameter.
Static or natural
Static, native or natural contrast determines the capabilities of a particular HDTV model. To determine it, a still image is used, in which the ratio of the brightest point to the darkest point is estimated. Unlike dynamic contrast, statics are required to evaluate this parameter.
High values of natural contrast are always appreciated, because when available, the image on the TV becomes close to the image on the screen in the cinema. White remains white and black remains black.
Which is better?
Many manufacturers deliberately increase the values of static and dynamic indicators solely for marketing purposes. Unfortunately, it is very problematic to determine the exact level of the parameter today, because it can be assessed in different ways and only with the presence of special instruments and testers . The common man and the buyer have to be content with the data of professional reviews of new TV models, which can be found in Internet sources, however, cases of inaccuracies have been identified in them.
Experts recommend opting for models with a high level of static contrast, rather than dynamic, paying attention to the presence of LED sources.
At the same time, digital values, as mentioned earlier, are not always correct, and therefore you should listen to your inner feelings and do not forget that the saturation of the image is affected not only by contrast, but also by the dullness or gloss of the panel, its anti-glare properties.
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