The refresh rate index on the TV - what is it?
When buying a TV it is desirable to learn and evaluate its parameters. In addition to the main (screen diagonal, price, etc.), there are a number of additional indicators that characterize the image quality. One such is the refresh rate index (IHO). We'll figure out what it is.
The resolution of the screen (the number of pixels) and the frame rate influence the quality of the picture on the TV screen. By permission, modern TVs have the standards of Full HD 1080p and Ultra HD 4K.
Along with this index, the index of the refresh rate of the TV set is also of great importance. In fact, IHO is characterized by the rate of staff update. This frequency is measured in Hz and shows how many times per second the picture changes on the TV screen.
Most older televisions have a frequency of 60 Hz. However, in order to obtain a better image, an increase in the refresh rate is required. This is due to the fact that in scenes with fast moving objects at a frame rate of 60 Hz, a blurred and uneven image appears.
At the first stage, the technology of frequency doubling was developed. For this purpose, digital processing of incoming frames was performed, as a result of which the frame rate increased to 100-120 Hz. Due to this, the most uncomfortable image defect - flicker - is eliminated.
Further increase in the number of intermediate frames takes into account two frames. As a result of using a large number of artificial frames (and increasing the refresh rate), a video with high accuracy and smoothness of the image is obtained. At the same time, objects moving at high speed have a high definition, and there is no blurring on them.
Modern TVs have a refresh rate index of up to 600-800 and even 1200 Hz. And although some experts doubt that such high frequencies significantly improve the quality of the image, when buying a high-quality TV of the Full HD or Ultra HD 4k classes, it is necessary to ensure that its IHO is at least 120-200 Hz..