Hard screen must be better than soft screen? LCD TV to buy misunderstanding

[PConline News] In the current home appliance stores, it is easy to find a phenomenon that is the LCD TV has a soft screen and hard screen, some consumers do not understand the product, it is easy to be guided by advertising and sales staff, fall into the election Misunderstandings. As for the LCD TV screen, is it better than hard screen? This may not be the case. Below, we will come to a deeper understanding of the soft and hard screens to clarify the actual situation.

Hard screen must be better than soft screen?

What is a soft screen?

The so-called soft screen, that is, with a finger crossed the LCD panel at the same time there will be "ripple", more representative of the Sharp ASV technology, Samsung S-PVA technology and AUO's MVA technology.

The simplest way to distinguish between hard and soft screens is to press the screen with your finger

ASV LCD panel, ASV technology is characterized by the original spherical pixels, true color reproduction, the overall tone is reddish, and the viewing angle is large. However, it is not possible to distinguish ASV panels by pixel alone, because Sharp has already exported the technology to panel makers in Taiwan. It is difficult to see the panel produced by Taiwan's ASV LCD panel and Sharp Kameyama plant in Taiwan. difference.

Cellular display pixel features

Sharp LCD-60X50A panel pixel close up (four-color technology)

Fujitsu's MVA technology, known as Multi-domain Vertical Alignment, is a multi-quadrant vertical alignment technology, it can be said that the first appeared wide-angle LCD screen technology, the current production of MVA manufacturers Chi Mei Electronics and AU Optronics. This type of screen can provide a larger viewing angle, usually up to 170°. The improved viewing angle of the P-MVA screen can reach 178°, which is close to the current consumer demand for viewing at home, and the response time can reach 8ms or less.

Skyworth 42E60HR panel pixel close up

Samsung's PVA technology (Patterned Vertical Alignment) also belongs to the category of VA technology. It is the successor and developer of MVA technology. The improved S-PVA can already be used in parallel with P-MVA. PVA uses a transparent ITO electrode instead of the protrusions of the liquid crystal layer in the MVA, and the transparent electrode can obtain a better aperture ratio, minimizing the waste of the backlight source.

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Samsung D8000 LCD panel close up

At present, flat panel TVs use a lot of soft screen products, and soft screens are divided into many kinds. Relatively speaking, VA class panels have high frontal contrast, but the uniformity of the screen is not good enough, and color drift often occurs. Sharp and sharp The text is its killer, and its black and white contrast is quite high. >>

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What is a hard screen?

Hard-screen (IPS) is relative to the soft screen, and it is a concept that many manufacturers have been scrambling for in recent years. IPS technology (In-Plane Switching, plane conversion) is a liquid crystal screen technology introduced by Hitachi in 2001, commonly known as "Super TFT".

The so-called IPS refers to: the screen pixels are full-pixel fish scales, the direction of the left, commonly known as "human" shape, the current hard-screen representative manufacturers are LGD and IPSα and other brands; hard screen is hard (touch-free pattern ), not to add a resin protective film outside the LCD screen, but determined by the molecular structure of the LCD screen, the LCD screen material, the soft screen and hard screen is also the physical structure of the LCD, its basic performance is the same .

LG 47LW6500-CA panel pixel close up

The IPS hard screen technology achieves a more stable liquid crystal structure by changing the vertical molecular structure of the VA soft screen to be arranged horizontally, bringing a more stable dynamic picture and a larger viewing angle. The most important feature of this technology is that its two poles are on the same plane, unlike other liquid crystal mode electrodes, which are arranged on top and bottom. Since the electrodes are on the same plane, the liquid crystal molecules are always parallel to the screen regardless of the state, which will reduce the aperture ratio and reduce the light transmittance. Therefore, the IPS application on the LCD TV will require more lamps, and in certain cases To the extent, power consumption will also be greater.

IPSα hard screen

The advantages of the IPS screen are high viewing angle, fast response, and accurate color reproduction. Compared with other types of screens, the screen of IPS screens is relatively "hard", and it is not easy for water-pattern deformation to occur when the hand is gently stroked, so it is also called a hard screen. >>

No distinction between soft and hard screen

Although hard screens and soft screens have certain differences in the production process, there is no absolute superiority or inferiority in performance. Hard screens must be better than soft screens. Hard-screen leakage contrast is poor, soft-screen side to see color distortion, however, hard-screen and soft-screen manufacturers have gradually improved their respective disadvantages.

TV production line

The physical properties of the hard screen and the soft screen are the same, as long as they do not damage by gravity or scratch with sharp objects. Whether it is a hard screen or a soft screen, it is impossible to determine the quality of LCD TV products, nor should it be the only criterion for consumers to choose between them. In fact, whether it is a soft screen or a hard screen, it will be broken and damaged when it encounters a sharp impact.

There is no absolute advantage or disadvantage between hard screen and soft screen

The author believes that using hard or soft as the standard for dividing the screen quality is not rigorous. For the liquid crystal display effect, not only the screen plays a role, but the image processing engine and the panel driving circuit are also very important.

Image processing engine and panel driver circuit are also important

Regarding the arguments for soft and hard screens, there are no “soft” and “hard” statements in the reference standards for LCD screen quality at home and abroad, and there are no authoritative organizations that have compromised hard screens and soft screens. Reviews. Therefore, it can be said that the hard screen and the soft screen are merely the differences in the later-stage processing of the liquid crystal panel, and there are no fundamental advantages or disadvantages. [Back to Channel Home]

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