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>> Quickly get to know LCD and OLED panel differences 10th,Jan,2017
Apple iPhone when the use of OLED panel news, almost every day. The major panel makers all want to fight for this large Apple orders. But what Apple iPhone now use the panel with the OLED What is the difference, why this topic began to heat up this year, with you to understand.In short, most of the current smart phone panel is divided into TFT LCD and AMOLED two categories. The TFT LCD is an abbreviation for a thin film transistor liquid crystal display (thin film transistor liquid crystal display). The technology is in two glass substrates by adding a layer of liquid crystal, the upper glass substrate with color filters, the lower is embedded in the transistor. When the current through the transistor to produce electric field changes, resulting in the transfer of liquid crystal molecules to change the pixel rendering, with the upper glass color filter, forming each pixel contains red, blue, green, through the red, blue, green color Of the pixels will constitute the image on the panel screen, and then with the backlight, that is, mobile phones use the color screen.
Super TFT, Super PLS, etc., early TFT-LCD display, the middle of the LCD array is mostly used TN (Twisted Nematic) mode, but its biggest drawback is the viewing angle So in order to solve this problem, VA liquid crystal (Vertical Alignment liquid crystal) technology came into being, can have a higher contrast and a wider viewing angle, is also the basis of the current TFT screen.The IPS (In-Plane-Switching Liquid Crystal) is a TFT which is more expensive, the rate is also a lower liquid crystal, the IPS liquid crystal electrodes and LCD in a plane, so there is no direction of technical problems, the screen can be up and down , 170 degrees around the standard perspective. In short, TN, VA, IPS difference is mainly in the side, top, depending on the perspective of the contrast with the color cast of the performance is not the same. Is currently being used for Apple iPhone, iPad series and LG smart phones.
The Super LCD is derived from the FFS (Fringe Field Switching) technology, which features a direct sunlight viewing feature, which emphasizes a face-to-face contrast ratio of 800: 1 and a horizontal 160 / vertical viewing angle of over 100: 1 Presentation. Currently used by Sony and HTC manufacturers. Super PLS (Plane to Line Switching) is developed by Samsung TFT panel technology, similar to the IPS function, not only the screen brightness increased 10%, the cost is relatively low, only Samsung own products.OLED panel advantages Where?
AMOLED is a shorthand (active matrix organic light-emitting diode) of Active-matrix organic light-emitting diodes, while AM active matrix refers to the pixel addressing technology behind OLEDs. Because AMOLED each pixel will be their own light, can be independently controlled, can achieve a more pure black and higher contrast. In addition, turning off unnecessary pixels while displaying a screen also reduces power consumption. As the screen module less internal layers, so the light transmission rate is better, is conducive to achieving higher brightness and a wider viewing angle. Also because AMOLED does not require TFT backlight, compared to the thickness of thin. But because AMOLED each pixel has its own use of time, if a block of long-term display high-brightness light source, easy to cause images with residual defects printed on the screen visual defects.
Samsung Display is the most important AMOLED technology manufacturers, which introduced the Super AMOLED is developed for smart phones, multi-touch panel embedded in the AMOLED, in order to reduce the thickness of the phone, because the current production capacity, mainly for Samsung's own products.Therefore, compared with the LCD OLED screen can be done very thin, very suitable for mobile phone-like mobile devices. In addition, due to the lack of hard backlight layer together with the maturity of the flexible plastic substrate, OLED flexible screen also has a great advantage, but also because of the development process AMOLED, Samsung was able to initiate the edge series phones.
Why this time to change the iPhone to change the OLED panel?
Because according to IHS latest report, AMOLED panel production costs and LCD formation of gold cross, both in the first quarter production costs were 14.3 US dollars and 14.6 US dollars, on behalf of AMOLED panel to replace the LCD panel in the coming days, and this is Apple to consider IPhone into the OLED panel, one of the factors is the cost is low enough. However, to cope with the huge demand for iPhone, the current capacity of the supplier is far from enough, so who can provide enough, enough cheap OLED panel, I believe more favorable to win Apple's orders.
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