Micro LED screens what is it
Micro LED TVs, this is a new technology for the production of screens. The very principle of displaying an image that is created by LEDs is certainly not new. We all saw promotional video walls made of LEDs. Previously, they were far from perfect and were used only for advertising. If you look at such a screen at close range, you can see individual LEDs.
The main developer of Micro LED technology for Samsung TVs. Since Samsung at one time abandoned the development of OLED displays, the corporation directed the freed up scientific capacities to the development of Micro LED technologies.
What is the difference between Micro LED vs LED and OLED
Briefly about the differences between LED, OLED and micro LED:
- LED – classic displays, the screen consists of pixels (crystals), they rotate changes the polarization of the crystal, the light flux that is created by the backlight located at the back of the screen passes through the pixels (red, blue, green) and so we see the image.
- OLED – the screen consists of organic LEDs in pixel size (also 3 colors), organic LEDs emit light, the brightness changes from the magnitude of the applied voltage to the LEDs, the viewer sees the picture. OLED screens have one significant drawback, OLED diodes are aging.
- Micro LED – A pixel (pixels of three colors as well) consists of several tens of micro LEDs. Note that the LEDs are not organic. The manufacturing technology of Micro LED screens does not allow for viewing angles like that of OLED or LED. The viewing angles of the Micro LED screens 155 by 145 degrees, this is slightly worse than the OLED. The second minus the depth of color shades, manufacturers do not give how many shades transmit Micro LED screens, and this suggests that this parameter is much worse than that of OLED.
How Micro LED works
The principle of operation of micro LED does not differ from the operation of an OLED display. The voltage is applied to the LEDs (micro), the brightness of the LED changes from the voltage value. Micro LEDs are grouped, one pixel that is transmitted in the image is a few dozen micro LEDs that are placed side by side.
Why are micro LEDs used?
The question may arise why micro LEDs are used, you can make an LED in pixel size. But there are several factors that influence this. One of the factors of reliability in case of failure of the LED (if it is a pixel size) on the screen will be a broken pixel. This fault cannot be fixed without replacing the screen. If you use micro LEDs, then the failure of even several diodes will be practically not noticeable to the viewer. A large margin of fault tolerance is achieved. The service life of the micro LED screen is about 100,000 hours of operation, this is 12 years of continuous operation.
Why Micro LED Screens Are Expensive
While micro LED technology is under development, the cost of manufacturing such screens is very expensive. There are difficulties with placing tens of millions of micro LEDs on the screen matrix. You also need to test the LEDs before installation, they must have the same brightness and the same color cast.
Problems in the manufacture of Micro LED screens
So far, manufacturers have not been able to create acceptable Micro LED screens in terms of the number of pixels, the pixel size is quite large and you can create only a large TV, for example, the smallest Samsung TV with a size of 146 inches and the price of such a TV is about $ 200,000. And as you understand, you need to watch it from a distance of 5-10 meters. Most buyers do not need such huge screens. More popular screens are 50-60 inches.
Is there a future in micro LED screens
With certain improvements (reduction in pixel size) and cheaper production, of course, such screens will create significant competition for OLED screens. But as experts in this field say, and the manufacturers themselves, it will take about 5 years to finalize the Micro LED screens.