Choice of technologies such as LED, LCD, OLED, and E-Paper

Choice of technologies such as LED, LCD, OLED, and E-Paper

LED, LCD, OLED and E-Paper are the main types of modern display technologies, each with unique characteristics and application scenarios. Here is a detailed comparison of them:

LED directly emits light through light-emitting diodes (RGB LED), or as a backlight to support other display technologies (such as LCD). LED display technology has become the first choice for outdoor display with its excellent brightness capability and excellent visibility under strong light. Its brightness is extremely high, especially suitable for outdoor strong light environment, so the power consumption is high, especially when displaying on a large area. However, the contrast is average and not suitable for people with high-definition display needs, but high-end LED screens can enhance the contrast through local dimming. In addition, it has a long life and high durability. The disadvantages of LED are also obvious. Its power consumption is high, it is difficult to achieve high resolution, and the dot pitch is large, which is suitable for long-distance viewing. The high brightness, long life and color performance of LED make it irreplaceable in the field of large-screen display. It is especially suitable for large-screen displays such as outdoor advertising screens, stage backgrounds, and stadium displays.

LCD (Liquid Crystal Display) display is one of the most common display technologies at present. LCD displays images by adjusting the amount of light transmission under the backlight through liquid crystal molecules. Therefore, as a mature display technology, LCD has become a cost-effective choice for the mass market with its low cost, high resolution and stable performance. From TVs to computer monitors, LCD displays are widely used in various devices due to their stability and cost-effectiveness, making them suitable for most indoor scenes. Although there are certain disadvantages in black performance and contrast, its wide applicability and good color reproduction make it the first choice for consumers in terms of price and performance.

Due to its self-luminous characteristics, each pixel of OLED technology emits light by itself, without the need for a backlight source, and relies on organic materials to achieve photoelectric conversion, achieving excellent contrast and extreme color performance. The brightness is moderate and the effect is good in dark light environments. Its contrast is extremely high, and it can display pure black with strong color expression. The energy consumption is low when displaying dark colors, but high when displaying bright colors. Because organic materials have aging problems, especially blue light pixels are easy to decay, so their lifespan is limited, and screen burn-in will also occur.

However, it is flexible and supports curved and folding screen designs. It is suitable for high-end TVs and smartphones, wearable devices (such as smart watches), VR/AR display devices, and users who pursue high image quality and advanced design.

E-Paper technology uses electrophoresis technology to control the arrangement of ink particles to form images, simulating the visual experience of a paper book, so its display effect is close to printed paper, which is ideal for reading and low-power applications. Its brightness does not require backlight, it is very readable in sunlight, and it only consumes power when refreshing. In addition, the energy consumption is extremely low, and it only consumes power when refreshing. It is very suitable for displaying static content for a long time. Although it has disadvantages such as slow refresh rate and limited colors, it is suitable for low-power display devices such as e-book readers and supermarket shelf labels.