Which performance is better: AMOLED and LCD contrast

- Oct 11, 2018-


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We know that the quality of the screen is one of the main factors that users pay attention to when purchasing mobile phones. The screen of the mobile phone is not only the difference between size and resolution, but also divided into different screen types. For example, Samsung's AMOLED technology and HTC's solid LCD technology, the industry's debate about which screen is better has been ongoing. So, what is the difference between the two display technologies? Please continue to look down.

Technical principle

Let's start with the LCD. The full name of this English abbreviation is liquid crystal display. The characteristics of the liquid crystal are a bit complicated, we only need to understand that it is like a blind, it will rearrange when there is current, and let light of different frequencies pass. With two horizontal and vertical polarizers, we can control the arrangement of liquid crystal molecules to control the passing light.

However, the liquid crystal material itself does not emit light, so a backlight is required. Each pixel is controlled by energizing a lateral ordinate on the mesh integrated circuit. Finally, red, green, and blue filters, also known as blends of sub-pixels, are used to produce different colors.

Glass substrate, liquid crystal, glass substrate, longitudinal polarizing plate

Is it complicated? The principle of AMOLED is much simpler. The technology uses a variety of tiny color LEDs to emit light of various colors. By adjusting the voltage to change the brightness of each of the red, green, and blue LEDs, we can get a variety of colors.

Color gamut

The most striking difference between the two screen technologies is the range of colors they can display. The set of colors displayed is called the level scale, which is part of the human eye's discernable color set.

Most media use the standard RGB (sRGB) level, which is matched by the LCD screen. This is also why LCD screens usually look more natural because they best match the range of colors used by other media. AMOLED can display more colors than LCDs, thus making the image look more vivid.

The reason for this difference is that the principles of the two technologies are different. We can control each LED pixel on a larger scale, so we can create a wider color gamut by mixing the main colors. Another benefit of AMOLEDs is the ability to more precisely control the display of black by dimming or extinguishing individual LEDs.

The color gradation of the AMOLED screen used by the Galaxy S4 and the LCD screen used by the HTC One. The curve represents the visible spectrum,