Before purchasing a TV, it is usually determined with the model, diagonal, type, brand and price. But few know that special attention should be paid to the value of the ICHO (update rate index). He has a great influence on the demonstration of TV.
What is the TV refresh rate index?
What is the TV refresh rate index? For the unit of measurement, ICH is usually taken to hertz. The parameter shows how many times the frame changes per second. The accuracy and brightness of playback depends on it.
Older models differ by 60 Hz. With this indicator, playback becomes inexpressive, pictures are blurry and uneven. If you increase the refresh rate, then the pictures will acquire evenness, brightness and accuracy.
To get rid of low-quality images, digital frequency doubling technology was invented. Incoming frames were processed. The result was an increase in values to 100-120 Hz. This removed the flicker defect and improved image quality.
The next doubling is based on two. Due to the increase in the number of artificial frames, the picture becomes clear, playback acquires smoothness and consistency. Increasing the frequency has a positive effect on improving display performance.
The index of the refresh rate for more modern models is 600-800 Hz, and for some it reaches 1200 Hz. Some buyers disagree with this technology. In this case, they need to make sure that the device they want to purchase has a value of at least 120-200 Hz.
What is affected by the refresh rate index on the TV
What affects the refresh rate of the TV screen? This option improves image quality. Thanks to its influence, pictures get rid of flicker. The effect is expressed in an increase in the number of frames, which improves the picture. The higher the ICHO indicator, the better the TV shows. This value is measured in hertz and indicates the number of frames produced per second. PQI has another name, scan.
Older models had a blurry, flickering image with fast moving objects. This quality distinguished monitors with an ICH of 50 Hz. Televisions with a PQI of 100 Hz have proven much better. But this indicator has not yet ensured the best quality of display. Only at 200 Hz did the image begin to conform to standards.
Digital TV has 3 additional, intermediate frames. Resolution also affects the quality of the demonstration. For example, for 4K devices with very high resolution, 120 Hz is enough.
What do the hertz on TV
Hertz show the refresh rate index parameter. The higher the number of hertz, the clearer and better the image will be. By their number you can determine how many "finished", intermediate frames the device produces. Their main purpose: to indicate how many frames this model is capable of producing.
With a scan of 100 hertz, the picture improved slightly. But it was clearly visible on the screens with a small resolution. For more formatted devices, a larger number of hertz is needed.
Datasheet Technical Description
The development process occurs in different models in its own way:
- LCD (The image appears due to the CCFL fluorescent backlight. It is not the best. But there is no flicker effect when scanning more than 100 Hz).
- LED (these are more modern LCD models, with a new image illumination using LED diodes. They are distinguished by greater contrast).
- Plasma panel (plasma cells are illuminated by ultraviolet radiation of the phosphor. The contrast here is higher, and the darker tones are more pronounced).
- OLED (organic molecules and polymers are introduced into the design. Due to the composition of the case, they do not need additional lighting).
Scan technology is as follows. Normal TV generates 50 frames per second. In digital processing, each of them is repeated, copied. Thus, a 100 Hertz scan was created. This method removed one of the most unpleasant effects: flickering with accelerated movement of objects.
Scientists working for world brands drew attention to how computer animation works. The technique consisted in the fact that two frames are selected for the primary basis, forming new, intermediate, intelligent. So a smooth, progressive, continuous movement was ensured. This invention produced the desired quality of pictures. "Dorisovka" additional frames proceeded from an analysis of the previous ones. The technology made it possible to achieve a smooth, very clear image with high-speed movement of objects. As a result, the blur phenomenon completely disappeared.
The most advanced models of the modern market have a sweep frequency of 600-800 Hz. They are equipped with integrated Sub-Field Driving. Display quality exceeds all expectations.
What affects the resolution of the TV
This characteristic is measured in pixels. Resolution also has a direct impact on the quality of the demonstration. Just five years ago, models were created with a resolution of 720 p. Today, manufacturers have released a new range of Full HD products with a screen resolution of 1080 p. Global brands have begun to develop the most advanced line: the HDTV-4K Ultra HD series. The product has been updated with a new indicator. It has 4 times more pixels than Full HD technology.
Japanese scientists briefly noted that they will begin to develop screens with a resolution of several million pixels. To raise this technology requires a lot of work in the spectrum of computer technology and TV. Science and production keep pace, developing new aspects of reality with TV.
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