Electronic cigarettes are now more popular with display screens. It is reported that the types of screens currently used include LED digital tubes and LCD screens. In the past two years, digital tubes were the mainstream, while in recent times, TFT-LCD screens have been receiving more attention. Let's briefly understand the difference between LED digital tubes and LCD screens in this article.
1, LCD screen and its characteristics
The full name of LCD (Liquid Crystal Display) is liquid crystal display, which is composed of a certain number of colored or black and white pixels, placed in front of the light source or reflective surface. The main principle is to stimulate liquid crystal molecules with electric current to produce dots, lines, and surfaces, combined with the back light tube to form a picture. Its characteristics are low power consumption, low price, and therefore widely used.
In terms of classification, LCD is mainly divided into two types: black and white and color screen (TFT).
Advantages and disadvantages of LCD display screens
Advantages:
LCD has obvious advantages in energy conservation.
Its radiation index is generally lower than CRT.
Due to its principle, there will be no geometric distortion or linear distortion.
LCD displays have a large visible area.
High precision image quality (excluding some low-priced shrink down displays).
Compared to CRTs, monitors are several times lighter in weight and thinner in thickness, making them easy to move.
Will not cause color distortion in the picture due to insufficient power supply.
Disadvantages:
The visual deflection angle is small.
It is prone to image dragging phenomenon (such as rapid mouse pointer shaking), which is due to the fact that ordinary LCD screens are mostly 60Hz (displaying 60 frames per second), while CRTs are mostly 85Hz (displaying 85 frames per second). However, this problem mainly occurred in games when LCD displays first became popular (i.e. "screen tearing"), and has been basically solved since then. If it still occurs, it can be solved using "vertical synchronization".
The brightness and contrast of LCD displays are not very good.
LCD "bad spot" problem.
Limited lifespan.
When the resolution is lower than the default resolution of the monitor, the blurring of the image will be very noticeable, while CRT will not be very noticeable even if the current resolution is 1 times lower than the default.
When the resolution is greater than the default resolution of the monitor (which needs to be forcibly set by software), the colors in the details will be lost, while CRT causes severe screen flicker and obvious blurring of the image.
2, LED digital tubes and their characteristics
LED Segment Display is a device composed of multiple light-emitting diodes packaged together to form an "8" shape, with light-emitting diodes as the light-emitting unit. The colors include single red, yellow, blue, green, white, yellow green, and other effects.
For example, the LED screens used in ZOOY DIAMOND 15000 and ELF BOX Digital 12000 are characterized by a very bright and clear display.
Electronic cigarettes are popular with display screens, and the main characteristics and advantages of LED digital tubes compared to LCD/TFT LCD and OLED display devices are:
Active emission type, therefore it has high brightness, wide viewing angle, and can be clearly distinguished for outdoor applications.
Fast luminous response time!
It can drive luminescence under low voltage and low current conditions, and is compatible with CMOS and ITL circuits.
Small size, light weight, and good impact resistance.
Long lifespan, with a service life of over 50000 hours and low cost.
And its disadvantage is:
High thickness, large volume, and heavy.
High power consumption.
The content that can display information is limited.
Overall, LCD screens are a display product with low power consumption, narrow viewing angle, and rich display content, so they are mostly used for handheld products with rich colors, diverse display content, and low power consumption; Digital tubes are suitable for products with a single display, wide viewing angle, and direct power connection.