The advantages and disadvantages of OLED and LCD, the difference between OLED and LCD part one

Organic light-emitting diodes (Organic Light-EmitTIng Diode, UIV OLED) are also known as organic electro-laser displays and organic light-emitting semiconductors (Organic Electroluminesence Display, UIV OLED). And liquid crystal display (Liquid Crystal Display, LCD) is a different type of light-emitting principle. OLED was discovered in the laboratory by Chinese-American professor Ching W. Tang in 1979, and the research on OLED was launched. OLED display technology has the advantages of self-luminescence, wide viewing angle, almost infinitely high contrast, low power consumption, and extremely high response speed. However, the price (larger display panel), life span, and resolution are temporarily unable to match the LCD monitor.

The advantages and disadvantages of OLED and LCD, the difference between OLED and LCD

The structure of LCD is to place a liquid crystal cell between two parallel glass substrates. The lower substrate glass is equipped with TFT (thin film transistor), and the upper substrate glass is equipped with color filters. The signal and voltage on the TFT are changed to control the liquid crystal molecules. Rotate the direction, so as to achieve the display purpose by controlling whether the polarized light of each pixel point is emitted or not.

The difference between OLED and LCD

The advantages and disadvantages of OLED and LCD, the difference between OLED and LCD

LCD and OLED are two completely different display technologies, both of which are currently widely used in the field of smart phones and flat-panel TVs. In addition, there are old technologies like plasma that once existed in the TV field, but they have gradually disappeared. At present, most users can only choose between these two display panel products, and if you don’t know how to choose, then this article will tell you some basic knowledge, and tell you the difference between LCD and OLED, and tell you How to pursue a balance between demand and budget.

LCD display

The whole process of LCD is called Liquid Crystal Display (liquid crystal display), which creates various colors based on white light passing through color filters. After passing through, the white light will form basic colors such as red, green and blue, and the light passing rate of each pixel is controlled by the current, thereby controlling the color of the pixel.

In the LCD display, it is very difficult to completely block the white light and display black. There will always be more or more light leakage, and this is why it is not possible to display true black on most night scene displays. s reason.

Passive and active matrix

LCD segment display screens have been used since the 1980s and were first used in "portable computers". These screens have pixels arranged in a "matrix" and are divided into active and passive matrices. Active matrix technology is more advanced, and allows more detailed control, and has a faster switching speed than passive matrix. Active matrix technology was introduced for the first time using TFT matrix screens, but later more variant technologies appeared, but they basically all work on the same principle, and the cost continues to decrease.

LCD backlight

All LCD displays require some form of white backlighting, and over time, backlighting technology has continued to improve. The purpose of the backlight is to have higher brightness, more uniform illumination, and to make the display smaller, thinner, and lighter.