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Comparison of advantages and disadvantages between OLED and miniled

Source: Lin Chuan precision article author: Lin Chuan precision time: August 7, 2020 23:19 reading: 531

   Introduction to miniled:

Mini led, also known as millimeter led, refers to the LED with grain size of about 50-200 μ m, and its grain size and point spacing are between the traditional small spacing led and micro led.

 Miniled backlight TV

As the outpost of micro led, mini led was put forward after micro led. Due to the key technical bottlenecks and high cost problems of micro led, such as micro process, massive transfer and full-color, it is necessary to develop Mini led with larger grain size, traditional process technology and lower technical difficulty. Combined with flip chip cob or IMD technology, mini LED can achieve point spacing less than 1 mm, pixel density is higher than small spacing led, and can achieve high gray display under low brightness. At the same time, mini led is used as backlight in LCD, which can improve the contrast through regional dimming, and realize the fine display effect such as HDR. LCD + Mini LED backlight has great development space in the field of large-scale display in recent years.

   OLED introduces:

The organic light-emitting diodes (OLEDs) are typical organic light-emitting diodes (OLEDs) with the structure of indium oxide (ITO) and tin oxide (ITO) as the cathode.

Advantages of OLED:

Display technology uses organic materials to self light, with flexible display, transparent display, high contrast, wide viewing angle, wide color gamut, light and thin.

OLED disadvantages:

1. The problem of short lifetime of mass-produced OLED blue phosphorescent materials has not been solved. At present, fluorescent materials are the main materials with low luminous efficiency;

2. Because the life of blue light is lower than that of red and green light, some pixels with longer working time accelerate aging, which may lead to screen burning;

3. Organic materials are prone to photooxidation reaction in the presence of water vapor and oxygen, so the precision requirements of organic film-forming technology and device packaging technology are high, which increases the cost of OLED;

 High cost curve of OLED

4. At present, the yield of OLED, especially large size, is low.

   Through the analysis of miniled and OLED, it is not difficult to find out : Mini LED backlight has excellent display performance such as high resolution, high contrast, high HDR and high curved surface backlight with flexible substrate. Compared with OLED , mini LED backlight has longer life, higher reliability and environmental adaptability due to the use of inorganic materials, and has no burning screen. According to Zhongguancun Online, the cost of TV with mini led direct backlight will be 20-30% lower than that of OLED.

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