GF is the abbreviation of "Glass Fine Color". Maybe you are not familiar with GF LCD screen. Because there are very few GF products on the market. In fact, GF belongs to STN. The main feature of GF is that the brightness is enhanced under the premise of low power consumption. But the GF LCD has some color.
TFD is the abbreviation of "Thin Film Diode". Because TFT LCD has higher power consumption. And the cost is higher. Thus greatly increasing the cost of products. So EPSON developed TFD technology specially for mobile phone screen. It also belongs to active matrix LCD screen. Each pixel on the LCD is equipped with a single diode. Each pixel can be individually controlled. So that each pixel will not interact with each other. This can significantly improve the resolution. It can display dynamic pictures and gorgeous colors without tailing. In terms of performance, TFD LCD has the advantages of TFT LCD and STN LCD screen. The brightness of TFD LCD is higher than that of STN LCD. And the colors are brighter. At the same time, it saves electricity more than TFT LCD screen. However, the color and brightness are still inferior to that of TFT LCD.
