Tft lcd display arduino.What are the display technologies? Mobile phones, televisions, notebooks, tablets and computers take up 80% of our daily life, and everyone uses display products from work to entertainment to study.

Most people rarely understand their principles, even if they do not understand the principles, if you can understand their respective characteristics and advantages, and then compare their own use to make choices, can also make the future use experience better and better.

LCD is liquid crystal display technology, which is commonly known as LCD screen. Liquid crystal (LCD) is the most mature display technology at present, and it is the most widely used screen display technology in the market because of its cost, quality rate, market recognition and other factors. In the use of mobile phone screens, liquid crystal (LCD) is mostly used in mid-range flagship phone models, while high-end flagships have turned to OLED screens in recent years.

To put it simply, its panel mainly has three layers: backlight layer (Back-light), liquid crystal layer (Liquid crystal) and color filter layer (Color filter).

The luminous principle of LCD is mainly based on the white light emitted by the light bulb or LED light bulb covered with the backlight layer, and then projects a thin film layer of red, green and blue, showing a variety of colors. But only in this way, the proportion of color can not be controlled, and a liquid crystal layer is added between the backlight layer and the color layer. the main function of the liquid crystal layer is to use the electric field to control the rotation of the liquid crystal branch to change the direction of the light. in this way, different electric field sizes will form different colors. This is the technical principle of liquid crystal (LCD). Liquid crystal (LCD) belongs to passive luminescence.

The Chinese name of OLED is “organic light-emitting diode”, also known as “electromechanical laser display” or “organic light-emitting display technology”. To put it simply, it refers to the phenomenon that organic semiconductor materials lead to luminescence driven by electric field.

The luminescence principle of OLED: a layer of organic light-emitting material with a thickness of tens of nanometers is made on the glass substrate as a luminous layer, which emits light under the action of electrons injected into the electrode. Specifically, the electrons and holes injected by the electrode are recombined in the light-emitting layer to form electron hole pairs, namely excitons, which are at the bound energy level, and the exciton radiation de-excitates to emit photons and produce visible light. The structure and function of OLED and the principle of luminescence are too complex, which may not be understood by non-professional students. You only need to know that OLED is completely different from liquid crystal (LCD) display. It does not need backlight. It uses a very thin organic material coating and glass substrate. When an electric current passes through, these organic materials will glow. This is the technical principle of OLED. OLED belongs to active luminescence. It is much thinner than liquid crystal (LCD), so it has outstanding advantages in folding, bending, energy consumption and so on, but it can not achieve mass production of large-size screens at present, and it is mostly used in portable products such as mobile phones.

Its principle is that the viewing angle is improved by switching the plane of liquid crystal molecules, making use of the space thickness, friction strength and the change driven by transverse electric field to make liquid crystal molecules do the maximum plane rotation angle to increase the viewing angle; IPS changes the arrangement of liquid crystal molecules and the distribution of electrodes, and the working situation is also changed. When no voltage is applied, the liquid crystal will not rotate at all, and the two orientation layers will show a relatively pure black when they are 90 degrees perpendicular. When a voltage is applied, the liquid crystal molecule rotates vertically so that light can pass through. This will give the screen a wider viewing angle, higher contrast, higher resolution and brighter color presentation.

It means that each liquid crystal pixel on the LCD is driven by a thin film transistor integrated behind it. Thus, it is possible to display screen information with high speed, high brightness and high contrast. TFT-LCD (thin Film Transistor liquid Crystal display) is one of most liquid crystal displays.

Thin film transistor liquid crystal display, its main function is to use thin film transistor to generate voltage to control liquid crystal steering. The main feature of TFT-LCD is that each pixel is equipped with a semiconductor switching device. Because each pixel can be directly controlled by a point pulse. Therefore, each node is relatively independent and can be controlled continuously. This design method not only improves the reaction speed of the display screen, but also accurately controls the display gray level. TFT has the characteristics of large area, high integration, powerful function, low cost, flexible process, wide application field and so on.

SLCD is “splicing special LCD screen”. SLCD is a high-grade derivative of LCD, using the world’s most advanced industrial-grade LCD panel with a service life of up to 60, 000 hours. SLCD is a complete splicing display unit, which can not only be used as a display, but also can be spliced into a super-large screen. The functions include: single screen split display, single screen separate display, arbitrary combination display, full screen splicing, vertical screen display, optional compensation or covering of image frame, etc.

AMOLED is a panel of active matrix organic light-emitting diodes and an enhancement technology of OLED, which belongs to the large class of OLED. The name AMOLED can be split into AM and OLED, where OLED describes the specific type of thin-film display technology ‘organic light-emitting diodes’ and AM refers to the pixel addressing technology behind it. With AM is equivalent to increasing the ‘active control’ OLED as long as the positive and negative poles plus the correct voltage, will emit light, but the lack of “AM” that is, active control, so the screen will always shine, and AMOELD screen its work not only needs a signal, but also needs additional power supply, so that the diode to achieve the working state, at this time to give bright or not bright signal, the screen will have the corresponding display. Samsung also launched the Super AMOLED,Super AMOLED screen on the basis of the AMOLED, which can be seen as an upgraded version of the AMOLED. Currently, Samsung is the only manufacturer supplying the screen, which should be regarded as the best screen among smartphone applications.

This technology is launched by Hisense and is mainly developed for electronic medical care and high-end LCD TVs. ULED needs to emit light through the backlight, while the liquid crystal molecules themselves cannot emit light. LED refers to the backlight, which needs to be distinguished from OLED.