You’ve undoubtedly heard of LED before, which stands for “light emitting diodes”. This device lighting technology is found in so many fields and product classes. From lightbulbs to car headlights, flashlights, and the screens of monitors and TVs. Yet, when monitor companies use the term LED, it actually refers to the backlight of LCD monitors. LEDs in screens act as the light source for individual pixels, allowing for the flat screens and bright monitors consumers have come to expect from modern products due to their super compact design. There are other types of light sources for LED, such as CCFL, or fluorescents. But LEDs have proven far better over the years, especially in cutting down the dimensions of TVs. Without LED, thin flat screen form factors would not be possible. So what’s OLED? You can think of OLED as an evolution of LED, or next generation LED, even though OLEDs have been around for quite some time by now. The term stands for “organic light emitting diode”, which means that each pixel is self-lit, and therefore there’s no central light source needed, as is the case with LCDs of all types, LED or otherwise. With no backlight or edge light, OLED screens are even thinner than regular LCD displays. But that’s not the only difference.

OLED (Organic Light-Emitting Diode) is an advanced display technology that is widely used in modern displays. OLED displays have many unique advantages over traditional liquid crystal displays (LCDs). OLED displays evolved from a thin film of organic materials that emit light, so they don't require a backlight module. This means each pixel can emit light independently, enabling higher contrast and more vibrant colors.

 

1. Working principle of OLED display

The working principle of OLED displays is based on the properties of organic light-emitting materials. These organic light-emitting materials are usually a carbon-based compound that can emit light through the action of electric current and voltage. OLED displays consist of a series of organic light-emitting layers that are placed between two electrodes. When electric current passes through these layers, electrons and holes combine and emit visible light. Each pixel is composed of three organic light-emitting materials, red, green and blue, and their different combinations form the desired color.

 

2. Advantages and application fields of OLED displays

OLED displays have many advantages that make them a mainstream display technology. First, OLED displays have higher contrast ratios and a wider color gamut, enabling deeper blacks and brighter whites for more lifelike images and videos. Second, because each pixel can emit light independently, OLED displays have faster response times and eliminate motion blur. In addition, OLED displays have a wider viewing angle, so the quality of the image remains consistent no matter which angle it is viewed from.

Owing to their excellent performance, OLED displays are widely used in many application fields. First, they are widely used in high-end TVs and monitors for a more realistic and immersive viewing experience. Second, OLED displays are also widely used in mobile devices such as smartphones and tablets because of their energy-saving and flexible properties. In addition, OLED technology has also been applied to virtual reality (VR) and augmented reality (AR) devices to present users with a more realistic virtual world.

 

Summarize:

OLED display is an advanced display technology that realizes the presentation of images through the characteristics of organic light-emitting materials. Its advantages include higher contrast, wider color gamut, faster response time and wider viewing angles. Due to these advantages and its wide application in fields such as high-end TVs, mobile devices, and virtual reality, OLED displays have become one of the mainstream display technologies.