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Is the hard-screen LCD TV just covered with a film?

Experts speak out for “hard screens”: It’s not just the surface that is hard.

“The so-called hard screen means that a resin protective film is added to the surface of the LCD screen. It just feels a little harder. The display effect is almost the same as that of a soft screen. Moreover, the heat dissipation is not good after adding a film to the hard screen!” When a promoter from a TV manufacturer using soft screen LCD introduced his superior technology to consumers, LG Display’s technical director Choi Jae Kwon looked unhappy. .

As the world's leading manufacturer in the field of LCD technology, LG Display's unique secret technology - IPS hard screen technology is unanimously favored by professionals. It is used in the world's top LCD monitors, such as EIZO, NEC, and APPLE. For professional display products, LCD panels using IPS hard screen technology are all used to meet the stringent color requirements of professionals in design, printing, aerospace and other industries. However, with the development of market demand, when LG Display applied IPS hard screen technology to large-size flat-panel TVs, it encountered an embarrassing situation: ordinary consumers cannot understand IPS hard screen technology. The advantages of LCD TVs are that the vast majority of consumers who buy LCD TVs know nothing about the panel, the most important component of LCD TVs. More people understand hard screens as "the surface is harder than soft screens", "more durable", "more durable" "Suitable for people with children at home" and so on, but they know very little about the viewing angle, dynamic picture clarity, accurate color reproduction and other display effects that IPS hard screen technology is proud of.

The reporter learned through the Home Appliances Industry Association that the debate over "soft screen" and "hard screen" in the field of LCD TVs has been going on for a long time. During the peak sales season, LCD TV manufacturers using "hard screen" technology will It has been attacked by manufacturers in the "soft screen" camp. Since in the home appliance sales process, consumers are more emotional and easily influenced by promoters' explanations, and many manufacturers use low-cost Taiwanese screens (soft screens), so the first scene occurred. Some promoters even said that "over time, the resin protective film of hard-screen LCD TVs may melt and stick to the LCD screen, damaging the LCD TV."

In response to the vivid attacks by competitors, LG Display conducted A powerful counterattack. Recently, LG released a test report on IPS panel LCD TVs commissioned by the National Digital Audio, Video and Multimedia Product Quality Supervision and Inspection Center (Fourth Research Institute). In this fair, scientific and authoritative test report, the Quality Inspection Center tested the dynamic definition project of LCD TVs using IPS panels based on the latest Electronic Visual Industry Association standards released in March 2008, and concluded: The dynamic resolution of LCD TVs with IPS screens reaches 780 lines. Although the relative static resolution has declined, it can still reach high definition according to the high-definition standard of 720 lines. This technology enhances the dynamic display effect of LCD TVs; it can provide better picture quality when watching fast-moving programs such as sports events and action movies. LG Display uses scientific basis to tell consumers: IPS hard screen technology is not only hard on the surface!

LG Display did not engage in a war of words with competing manufacturers over the softness and hardness of the LCD panel surface. Instead, it "proved that it is the best" in terms of the display effect that users are most concerned about. So what does dynamic clarity mean to consumers? We know that when buying an LCD, you have to buy a high-definition one. However, most of the high-definition TVs promoted in the market refer to the clarity of static images. When we watch TV and play games, in most cases we watch dynamic pictures. This requires the LCD TV to have a short response time and effectively control the smear and afterimage problems of dynamic display. And this is the strength of the IPS hard screen.

Many users have had similar experiences. If they gently slide their hands over the "soft screen" LCD TV screen, a "water mark" will appear. If they are playing fast dynamic pictures, , because the touch causes the display screen to pause, and is superimposed with the subsequent screen, causing the screen screen to become chaotic. This is the so-called LCD "image afterimage" phenomenon. If you watch a program with fast picture changes, such as racing sports, "soft screen" LCD TVs will produce a "smearing" blur phenomenon, and the dynamic clarity will be significantly reduced, which will be very tiring for your eyes if you watch it for a long time. The problems of smearing and afterimages in dynamic pictures are the "flaws" of soft-screen LCDs.

Because of this, when we see high-definition videos of live demonstrations by merchants in stores, they are usually specially produced programs with a relatively "soothing" rhythm, which feels good. However, when you buy it and watch the competition program at home, it will show The effect is much worse, precisely because the dynamic clarity is greatly reduced.

In contrast, the IPS hard screen solves the problem of dynamic display clarity very well. And in order to better adapt to the needs of large-size LCD TVs and flat-panel displays in public environments, IPS hard screens took the lead in increasing the viewing angle of LCDs to 178 degrees, almost reaching the limit of LCD technology and basically eliminating the need for visual On the "dead end". Careful consumers may find that almost all of the subway lines 5 and 10 opened in Beijing to welcome the Olympic Games use LCD TVs with IPS hard-screen technology. They play Olympic game descriptions every day and receive more than 100,000 daily videos. Tested by millions of passengers.

In fact, the "hard" display effect of IPS hard screens comes from its unique and advanced IPS liquid crystal technology. IPS (ln-Plane Switching) technology uses horizontally rotating molecular arrangements and has a stable and solid liquid crystal structure, so it feels "harder" than those vertically arranged soft-screen LCD technologies. In addition, when measuring the surface temperature of LCD TVs, the hard screen is about 40°C, while the soft screen is about 45°C. There is no problem that the hard screen has poor heat dissipation effect. If consumers encounter the statement "a hard screen is just a protective film" when purchasing an LCD TV, they might as well ask the promoter. But when we buy an LCD TV, don’t forget to “touch it”!