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Company News >> Will AMOLED replace LCD? 9th,May,2017

In recent years, the debate about whether Active Matrix Organic Light Emitting Diode (AMOLED) can replace active matrix liquid crystal display (AMLCD) as the next generation of mainstream display technology is rampant. However, So far no conclusion. At present, AMLCD has a mature industrial chain, manufacturing a display of the cost is gradually declining.

However, Samsung as the representative of the Korean manufacturers are fully layout AMOLED technology in the application of mobile phone screen, which has its own mobile phone display nearly 70% replaced AMOLED screen, and even stopped their own 7-generation AMLCD phone panel production line. In order to promote the development of AMOLED industry chain, Samsung is also actively promoting the Chinese-made mobile phone Samsung AMOLED screen. At present, OPPO, vivo, Meizu, Huawei, ZTE and other domestic mobile phones have been used by Samsung AMOLED touch integrated screen, AMOLED display shipments continued to rise.

It is reported that in the second half of 2016, Samsung will continue to expand its in the AMOLED display chip size, and next year Apple iPhone 8 mobile phone debugging new production line. According to IHS estimates, AMOLED's share of the display panel market continues to increase, with shipments currently up to 11% and expected to climb to 22% in 2020.

In addition, Japan's Sharp and South Korea's LG are also researching and advancing large-size AMOLED displays. Sharp reports its 13.5-inch AMKED display with a 4K2K resolution at the important conference SID in 2012. LG reported and demonstrated its 55-inch Full HD AMOLED TV prototype on the 2014 SID.

It can be seen that the current AMOLED display is thriving, compared to AMLCD, AMOLED has a higher contrast, wider color gamut, lower power consumption, more light, wider viewing angle, faster response, outdoor readability Stronger and so on. The following will be a technical point of view from the perspective of AMLCD and AMOLED advantages and disadvantages.

First introduce the AMLCD light principle. AMLCD is the use of liquid crystal photoelectric effect, through the thin film transistor (Thin Film Transistor, TFT) circuit control of the liquid crystal cell transmittance and reflectivity, resulting in a different gray level of a flat panel display technology.

Since the liquid crystal material itself does not emit light, so AMLCD is a passive light type display, the need for backlight. AMLCD structure layer shown in Figure 1. The backlight module generates a white backlight, converts the polarizer into a uniform line of polarization in the direction of vibration, and then passes through the TFT and the liquid crystal molecular layer. Depending on the voltage generated by the TFT layer, the liquid crystal molecular layer will have different twist angles to polarize the polarized light, twist the direction of vibration, and then produce different colors through the filter sheet, and finally through the second layer of polarizer The first layer of vertical), to achieve the control of light intensity, and ultimately through the red, green and blue three different colors of light combination to achieve different colors and grayscale.