The materials of mobile phone screen are STN, CSTN, UFB, TFD, TFT, (LTPS)TFT, etc.
Super Twisted Nematic can only display 256 colors at first, and finally support 4096 colors or even 65536 colors. It's more energy-efficient and cheaper, but when you get what you paid for, STN's response is slow. When playing dynamic images, it is easy to cause image residue and affect the image quality. In addition, color and brightness are fatalistic shortcomings, which are always worse than TFT. Representative models: STN screen is preferred for low-end models, and the price will generally not exceed 2000 yuan, such as Nokia 66 10i, Siemens C62, etc.
It's an enhanced version of STN.
Ultra-fine & bright, equivalent to TFD, characterized by ultra-thin and high brightness. In design, UFB LCD also adopts a special grating design, which can reduce the pixel spacing and obtain better image quality. Generally, UFB LCD can display 65536 colors with a resolution of 128× 160 pixels. At the same time, the contrast of UFB liquid crystal is twice that of STN liquid crystal. 65,536 colors, the brightness is comparable to TFT LCD, but the power consumption is less than TFT LCD. The price is similar to STN LCD, and the representative models are Samsung X608(65K color) and LG 865438.
Thin film diode has better brightness and color saturation than STN, and saves energy than TFT. Representative models: Samsung V208(65K color), Sony Ericsson Z608(65K color), LG 8280 (26 260,000 color), Lenovo G900 (26 260,000 color), etc.
Thin film transistor (TFT) is a kind of high-quality screen, which can display more accurate and high-resolution images with high power consumption and high cost. At present, it has gradually become the mainstream, and many mobile phones have been equipped with TFT screens. Representative models: mid-to-high-end models are preferred, and the price is generally more than 2,500 yuan, such as Nokia 7200(65K color), Sony Ericsson K700C(65K color), Amoi DF9 (26 260,000 color), NEC N600 (26 260,000 color) and so on.
Low temperature polysilicon is the best display TFT. At present, most TFT panel products on the market adopt a-Si TFT manufacturing technology, and a few small-sized products begin to adopt LTPS technology. LRPS TFT is a new generation product derived from TFT, which has the characteristics of ultra-thin, light weight and strong durability. In addition, it also has the advantages of fast response, low power consumption, and the circuit can be attached to the glass. Its application covers mobile phones, PDA and so on. The biggest difference between LTPS TFT and a-Si TFT is that it can provide brighter and finer pictures, which is lighter and more energy-saving. However, not all manufacturers are willing to use it because it has not yet formed mass production and the cost is high. According to the international photoelectric and display forecast, by 20 10, 80% of the global mobile phone panels will be replaced by TFT-LCD, among which LTPS with the best display effect is one of the main forces. Representative models: high-end model patents, Alcatel OT835 (26 260,000 colors), Konka A08 (26 260,000 colors), etc.
At present, the best mobile phone screen is Sharp's CGS-TFT (CG-Silicon Continuous Granular Crystal Silicon Technology) screen. Because it is a patent, only this brand uses this screen.
Organic light-emitting display (OLED) belongs to a new category of mobile phone LCD, and is known as "dream display". Organic light emitting diode display technology is different from the traditional liquid crystal display mode. It does not need backlight, but uses non-very thin organic material coating and glass substrate. These organic materials will emit light when current passes through them. In addition, the organic light-emitting diode display screen can be made lighter and thinner, with a larger viewing angle, and can significantly save electricity. In the two major organic light-emitting diode technology systems, the low-molecular-weight organic light-emitting diode technology is mastered by Japan, while the polymer PLED technology and patents are mastered by the British technology company CDT. Compared with PLED products, it is still difficult to color, while low-molecular organic light-emitting diodes are easier to color. However, although the OLED with better technology will replace LCD such as TFT in the future, the OLED display technology still has some shortcomings, such as short life and difficult to enlarge the screen. At present, organic light-emitting diodes are mainly used on the outer screen of dual-screen mobile phones, mostly in 256 colors.