Different 120Hz refresh rates? High brush TV should be carefully selected!

As for the concept of screen refresh rate, most of the groups concerned are game players. Because if the game wants to immerse players in it, it must provide a smooth picture and keep it as real as possible. So from the past few years, displays that can achieve a 144Hz refresh rate were called e-sports displays. At the same time, mobile phones also launched e-sports mobile phones with the same high refresh rate, while game TV with a 120Hz screen refresh rate only began to rise last year.

Once the concept of game TV emerged, it attracted a large number of console game players, and the screen refresh rate of up to 120Hz seems to have become the standard configuration in the industry, because in the same year Microsoft and Sony both said that the new generation of game consoles can output 4K 120Hz game graphics. As the main display device for host players, the low screen refresh rate can not give players too much upgrade experience.

But is 120Hz useless for ordinary consumers who do not play games? In fact, in many high-end TV products, there are some complementary frame functions for TV pictures, which can increase the number of pictures of movies and TV plays that we watch on streaming media from no more than 30 frames to a higher number of frames, thus giving full play to the advantages of TV panels. But why are different televisions different in the effect of complementary frames? Because they use different techniques.

Method 1: Insert black frame and repeat frame

If the picture in a movie or TV play is 30 frames, it simply means that 30 pictures are played continuously in one second. If you want to increase the frame number of the picture, you can insert the corresponding pure black or the same picture directly. Although this practice seems simple, as if it was just a random idea of the manufacturer, it actually has scientific basis.

First of all, the human eye has visual inertia, and every picture will have residual image before disappearing. If the TV picture displays a pure black image after displaying a frame of image, it can use the visual inertia of the human eye to cover it up, so as to eliminate smear and make the picture display more smooth. However, the disadvantages of this approach are also obvious, especially in LCD TV The screen flickers and brightness decreases. In contrast, the method of inserting duplicate images has a worse effect. Although the number of frames has increased, the visual experience has not been improved.

Method 2: MEMC

Many people are familiar with the MEMC function, also known as motion compensation. Providing the MEMC function on high-end TV can prevent tearing and dragging when playing high-speed motion pictures. However, compared with inserting black frames and repeated frames, it inserts "operation frames". This method is mainly based on the intelligent analysis of the two adjacent images before and after, and the algorithm automatically generates a frame that does not exist in the original picture and is between the original two images. This can not only make the picture smoother, but also effectively reduce the picture trailing phenomenon.

However, it is worth noting that since this frame is output by the chip based on the algorithm, errors may occur if the image exceeds the algorithm, so most TVs provide the active switch function. However, in general, the MEMC function must be the optimal solution to increase the number of frames.

Selection suggestions

In fact, no matter what kind of function, it is ultimately to bring better visual experience to consumers. At present, film and television works and games that can reach 120Hz are really rare. It may be the most important form in a short time to give full play to the power of high refresh panels through complementary frames. So at the same price, try to choose a TV with MEMC function. After all, it is not impossible to insert black frames even at 240Hz. Of course, due to the different algorithm schemes of different chip manufacturers, there will be slight differences in the final results, and there will also be slight differences in the name.

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