LED Digital tube, TFT screen and OLED screens are three types of screens widely used in electronic devices. They have significant differences in composition, technical principles, and applications.

I. LED digital tube

Composition:

LED The digital tube consists of multiple LED light-emitting diodes, each LED corresponding to a part of a number or symbol on the digital tube. They are encapsulated in a transparent plastic or glass shell to form an integrated display unit.

Technical principle:

LED The working principle of the digital tube is based on LED light-emitting characteristics. When current passes through LED it LED will emit light, and the color of the light depends on LED the material. In the digital tube, by controlling the on and off of different LED LEDs, numbers, letters, or symbols can be displayed.

Application:

LED Due to its simple structure, low cost, and ease of control, digital tubes are widely used in various occasions requiring digital displays, such as electronic clocks, counters, and thermometers.

Advantages:

Energy saving and environmental protection: LED Compared with traditional LCD displays, digital tubes have higher energy-saving and environmentally friendly characteristics. Because they use DC drive, the power consumption is lower, and they do not need to use a liquid crystal screen, so they are more energy-efficient.

Lower cost: Compared to some high-end display technologies, LED digital tubes are relatively inexpensive and more suitable for use in some low-end application scenarios.

Strong customizability: LED Digital tubes can achieve different character displays through LED different combinations, so they have high customizability and can be designed and produced according to needs.

Disadvantages:

Limited display effect: Compared with TFT screen and OLED screens, LED the display effect of digital tubes is relatively simple, usually used to display numbers, letters, and simple graphics, and is not suitable for displaying high-definition videos or complex images.

II. TFT screen (Thin Film Transistor)

Composition:

TFT The screen consists of many complex components, including a liquid crystal layer, a backlight module, a thin-film transistor, a color filter, a polarizer, etc. The liquid crystal layer is TFT the core part of the screen, used to control the transmission and blocking of light; the backlight module provides the light source; the thin-film transistor acts as a switching element to control the on and off of each pixel.

Technical principle:

TFT The screen is a type of active matrix liquid crystal display. It controls the arrangement direction of liquid crystal molecules through thin-film transistors, thereby controlling the amount of light transmission. When current passes through the thin-film transistor, an electric field is generated to cause the liquid crystal molecules to deflect, thereby changing the light transmittance and realizing image display.

Application:

TFT Due to its advantages such as high definition, high color reproduction, and low energy consumption, the screen is widely used in high-end electronic products such as smartphones, tablet computers, and LCD TVs.

Advantages:

High resolution: TFT Screens usually have high resolution, capable of presenting clear images and text, suitable for reading, watching high-definition videos, and graphic design tasks.

Fast response time: Due to the use of liquid crystal technology, TFT screens have a fast response time, suitable for playing dynamic content and games, reducing motion blur and ghosting.

Multifunctionality: TFT Screens are widely used in various electronic devices, including smartphones, tablet computers, TVs, and computer monitors, to meet the needs of different users.

Wide viewing angle: TFT Screens usually have a good viewing angle, and the image quality can be maintained even at oblique viewing angles.

Disadvantages:

Higher energy consumption: TFT Screens usually require a backlight to produce brightness, which may lead to higher energy consumption, especially when displaying high-brightness content.

Black level limitations: Compared with OLED screens, TFT screens may have some limitations in displaying deep black because the liquid crystal cannot completely turn off the light source.

III. OLED screen (Organic Light-Emitting Diode)

Composition:

OLED The screen consists of an organic light-emitting material layer, an anode, a cathode, and an encapsulation layer. The organic light-emitting material layer is OLED the core part of the screen. When current passes through, the organic material emits light.

Technical principle:

OLED The working principle of the screen is based on the electroluminescence phenomenon of organic materials. When current passes through the organic light-emitting material layer, electrons and holes recombine in the light-emitting layer to generate excitons, and when the excitons decay, they release energy and emit light. OLED Each pixel of the screen can emit light and control the brightness independently, so it has extremely high contrast and color saturation.

Application:

OLED Due to its advantages such as self-emission, high contrast, wide viewing angle, and low power consumption, the screen is widely used in smartphones, high-end TVs, wearable devices, and other fields. In addition, OLED screens can also achieve curved and flexible designs, providing more possibilities for product design.

Advantages:

Self-luminous: OLED Each pixel of the screen is self-luminous, so it is better than LCD Lighter and thinner, and without a backlight, it can achieve higher contrast and deeper blacks.

Low power consumption: OLED The screen saves the backlight, liquid crystal, and color filter structures, resulting in lower power consumption.

Flexible display: OLED The screen can achieve flexible display, providing more possibilities for the design of future electronic devices.

Vivid colors: OLED The screen has higher color saturation, and the image colors are more vivid.

Disadvantages:

Higher cost: OLED The production process of the screen is complex, so the price is relatively high.

Shorter lifespan: OLED The lifespan of organic materials is limited, usually only a few thousand hours.

Burn-in risk: OLED When displaying static images at low brightness for a long time, the screen may experience burn-in.