Home » What is the difference between soft and hard LCD TV screens? Which one is better

What is the difference between soft and hard LCD TV screens? Which one is better

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LCD screen is divided into soft screen and hard screen, but this is not literally, but refers to the different arrangement of liquid crystal molecules, soft screen liquid crystal molecules are perpendicular to the screen, hard screen liquid crystal molecules are arranged parallel to the screen, so the soft screen will appear water ripples when pressed by hand, while the hard screen is not easy to appear, hence the name soft screen hard screen.

I discussed with the big brother who did the monitor review, and found that the monitor screen and TV screen are very different, and the user needs to use the scene is also very different, so you can not discuss the same, such as response time, according to the theory of the monitor, IPS screen response time is a significant advantage, but in the TV screen, IPS is no such advantage.

And color gamut and color accuracy, TV soft screen can also do high color gamut and high color accuracy. And for the TV, in fact, color accuracy is not important, the monitor is a productivity tool, high requirements for color accuracy is very reasonable, but the TV is a digital product for entertainment, consumers want to look good color rather than good color accuracy, the two are even the opposite of the road. Some TV color accuracy measured very good, but the actual playback of the source, due to manufacturers have their own tuning style and algorithms, color differences are still very large. Therefore, please do not use the theory of the monitor to evaluate the TV screen.

Next we talk about what are the differences between the soft and hard screens of TVs, which will be helpful when buying a TV.

First, the contrast ratio
Contrast ratio is the ratio of the maximum brightness of the screen to the minimum brightness, generally speaking, the higher the contrast ratio is better, such as OLED TV is almost infinitely high contrast ratio, so the picture quality is very good. Soft screen contrast ratio advantage is obvious, the basic contrast ratio can reach 3000 to 5000, plus the checkerboard type light control partition, can reach more than 7000. The contrast ratio of IPS hard screen is worse, the base contrast ratio is about 1000, plus the case of tessellated light control partition is about 2000.

It should be noted that the general method used to measure the screen contrast is the checkerboard grid, which relatively more reflect the contrast of the real scene, rather than testing the screen all-white brightness and screen all-black brightness, some brands will test this way, to make the data better.

Second, the screen response time
Response time refers to the time required for pixels to switch from one state to another, such as white to black, black to white, gray to another gray, etc., limited by the physical characteristics of the liquid crystal molecules, state switching requires a certain amount of time, and OLED TV is completely different from the LCD, can achieve an instant response. The length of the response time affects the sense of trailing images on the screen, it is clear that the screen with a long response time will be more prone to trailing problems.

I extracted the response time data of 25 models from Rtings, there are soft screens and hard screens, it can be found that the IPS screen in the response time is not advantageous compared to VA soft screen.

Third, the minimum brightness
Minimum brightness affects the depth of the black area of the screen, OLED screen thanks to the pixel-level light control advantage, you can completely close the pixel point to achieve complete black, while ordinary LCD TVs due to the need for backlighting light, but also by the surrounding backlighting can not be completely black, so the black will be displayed as gray. Here is also related to the contrast ratio, for example, when two TVs are 600 nits peak brightness, a VA screen (contrast ratio 5000:1), an IPS screen (contrast ratio 1200:1), then the minimum brightness of the VA screen is 0.12 nits, IPS screen minimum brightness is 0.5 nits, obviously the VA screen will be darker deeper. And this also affects the TV screen transparency, IPS is hard in this regard.

On IPS, under VA
Fourth, the viewing angle
We all know that the IPS viewing angle is good, this is true, from the side of the view, IPS almost no loss of color and brightness, and frontal viewing effect is similar. And VA screen from the side to see the color will be different, the brightness will drop, which is related to the direction of the liquid crystal molecules are arranged in a very large screen, the viewing angle is relatively important, such as 98 inches, in smaller screens such as 65 inches and below size, the impact is not significant, because the normal TV is sitting in front of the TV, sitting on the side of the TV, I’m afraid that people do not care about the picture quality effect. Samsung and Sony in order to improve the viewing angle of their own soft-screen TV, the use of a wide viewing angle film program, but this program will significantly reduce the picture contrast, feel like a kind of pick up the sesame seeds to lose the watermelon behavior.

Five, light leakage problem
As the saying goes, ten hard screen nine leaks, there is a special leak, said the IPS hard screen generally has the problem of light leakage, the edge of the screen / four corners, there will be a large area of brightness more than the average, as shown in the figure. Common glory wisdom screen / Sony 8 series and other hard screen models are commonly seen. And VA soft screen almost will not appear this situation.To summarize the difference.

Finally teach you how to distinguish between soft screen and hard screen, in fact, the way to pinch by hand for newcomers is still not intuitive and accurate, if the physical store, the guide may not let you pinch (afraid of pinching bad), in fact, there is a simpler way, the TV off state, take out the phone to open the flash, shine it against the screen, look at the reflection pattern can be.

Note that the Samsung Sony high-end machine if the photo out of the rainbow stripes, that is, with a wide range of sharp view film models, are soft screen.

At present, Japan and South Korea LCD screen gradually exit, domestic BOE (hard screen) and Huaxing photoelectric (soft screen) is the mainstream, even Samsung Sony is also using, so there is no need to “foreign” that foreign screen is good domestic screen is poor, but the soft screen hard screen has a certain impact on the picture quality, this can be noted when shopping for

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