LCD monitors are taking a larger part of the displays market nowadays. People obtain CRT monitors rarely, as there are FT models in different price ranges. The comparison of 15 LCD monitors from different companies, such as new models from Cornea nec Samsung, demonstrates the abilities in this area.
One of the most important advantages of LCD displays is the absence of problems with the geometry. These monitors do not display any distortions of the geometrical shapes. There are also no brightness problems. This property of LCD displays is very useful for designers, who appreciate exact graphical figures.
At the same time, LCD monitors have some problems, which make people still use CRT displays. The comparison of 15 LCD monitors is the best way to ensure which models of monitors have better technical parameters.
The contrast of the monitors is one of the most important characteristics. The one of the best CRT monitors is 700:1. Simultaneously, the best LCD monitors have only 450:1. There are many popular models, which have the contrast 250:1 or even 200:1. The low level of contrast makes dark colors display as absolutely black. In this way the picture looses colors easily.
The purchasing comparison of 15 LCD monitors shows that producers announce the support of sixteen million colors. Therefore, the TFT matrix is able to display only two hundred and sixty thousand colors in the most cases. The development of LCD monitors in the last years makes their spectrum close to the color range of CRT displays.
The update frequency 85 Hz is a good parameter for CRT displays. Nevertheless, you cannot transfer this parameter directly to the TFT monitor. The best CRT displays should have a higher frequency of the electronic beam scanning. Actually, CRT displays should work with the frequency 85-100 Hz. LCD displays create an image with the pixel, containing red, green and blue sub-pixels. The quality of image depends on the speed of pixels' switching on and off. The time of switching pixels on and off is called the response time.
The comparison of 15 LCD monitors and analogue CRT models provides the following results. The brightness of LCD monitors may vary from 170 up to 300 kD per square meter. This parameter varies from 80 up to 120 kd per square meter for CRT monitors.
The contrast of LCD displays is from 150:1 up to 450:1 and the CRT contrasts are from 350:1 up to 700:1. Another important parameter is a viewing angle, which varies from ninety up to one hundred and seventy degrees for LCD displays. This parameter is higher than one hundred and fifty degrees for CRT monitors.
At the same time, LCD displays do not provide any geometrical mistakes as CRT monitors. LCD monitors can be connected to the video adapter via analogue or digital interfaces. CRT monitors have only an analogue interface. There is one more strong advantage of LCD monitors - they do not blink at all, but CRT monitors present some visible blinking, when the frequency is lower than 85 Hz. The power supply of LCD monitors is one item that leads them to the superiority according to the comparison with 15 LCD monitors. A good TFT monitor needs from 25 up to 40 Wt and the CRT has a power supply of 60-160 Wt.