Samsung XL20 LED screen will highlight the real color

Super wide color gamut LED backlight provides the excellent color accuracy, many for professional and high-end application design includes a built-in calibration device, the Samsung XL20 is a high-end and professional super lethal products, of course, in order to have it you must be able to bear the high price.

Have you ever noticed that the color of our computer monitor is quite different from the real world? Those who are very picky about the color of the professional users are aware of a "secret": ordinary displays can only show that we can perceive a very small part of the natural color of the eye. But the 20 inch LCD XL20 from Samsung an unprepossessing has changed this situation, through the use of LED backlight technology, it can show the number of colors than ordinary display increased more than 50%.

LED ascendant

In fact, LED (light-emitting diode) can be seen everywhere in our lives. A lot of equipment on the lights are LED, stadium and public places in the large outdoor display is also mostly using LED technology, and even the car taillights, traffic lights have begun to use LED. The popularity of LED has been greatly improved in recent years in terms of luminous efficiency, life expectancy, cost and color performance. We tested shortly before the Samsung handheld projector uses three LED as light source, mobile phone and handheld LCD screen also started using LED as a backlight source, in SONY, DELL and ASUS recently have launched using LED as the screen backlight notebook computer, so the desktop LCD LED as the backlight source nor what a surprise, but Samsung XL20 is the first LED backlit LCD display we tested.

Desktop computer or laptop LCD monitor has been using CCFL (cold cathode fluorescent lamp) backlight, the light source and our home fluorescent lamp is similar to the principle of. Considering the cost and the CCFL tube slender shape, liquid crystal display tube is arranged in the liquid crystal panel often face, and then through the light guide plate of complex structure for light evenly spread onto the screen, so as to increase the complexity of the structure, but also reduces the light utilization efficiency, and achieve the final screen uniformity is still not very ideal. In addition, the CCFL lamp color performance is not good, the ordinary LCD display color gamut can only reach 70-80%NTSC, far less than the real world color range, especially in the performance of the green will feel full of vigour to lifeless picture.

According to the data, the Samsung XL20 LED backlight color range after a staggering 114%NTSC, it can not only make the picture look more colorful, more reflect the true colors of the world, but also brought benefits to the professional image of workers. Because it can meet the Adobe RGB1998 standard to make wide color gamut, photographers, professional designers see their works on the display of true colors, and ordinary display only reach sRGB standard will make Adobe RGB standard photo or image color dim distortion.

LED backlight with lattice, there are hundreds of LED light emitting unit evenly distributed in the back of the LCD panel, they emit light directly transmitted to the screen, so do not need light guide design is complex and low efficiency of light. And each of the LED can be controlled separately, which makes it possible to adjust the backlight to set the brightness of the various regions of the screen or even color uniformity. The XL20 also provides a matching test probe allows the user to calibrate the screen color and brightness uniformity.

In addition, the life of the CCFL is also worthy of attention, the use of 2-5 hours, the brightness will be greatly reduced, seriously affecting the screen effect. The life of the LED is more than doubled, so that the display can not keep a long time to maintain the effect of bright".

Of course, LED as a new technology still needs to be improved and improved, there will be many deficiencies at this stage. For example, in terms of luminous efficiency is still not as good as CCFL. Through the actual test, the XL20 energy efficiency index is only 0.45, while the ordinary LCD can reach about 0.8, that is to say the same screen size in order to obtain the same brightness, XL20 to nearly double the power consumption. Of course, the efficiency of LED in recent years, the rapid increase, we can expect the next generation of XL20 products may be significantly improved.

XL20 uses LED backlight lattice method, because LED uses matrix direct lighting, in order to avoid the formation of a bright spot on the screen, you need to tell the LED and LCD screen to keep enough distance, so that the light diffusion uniformity. We see that the thickness of the XL20 is more than twice that of an ordinary LCD monitor, but this does not cause much inconvenience to the user. Increase the thickness of a better solution to the problem of LED heat dissipation, and XL20 also has a built-in fan for active cooling, such a design is not seen in the ordinary LCD display. From the point of view of our actual use, under normal circumstances, it is basically not aware of the working noise, so you do not have to worry about.

Source: CNET science and Technology Information Network