Writer: adminRelease Time: 2024-09-23 09:34Browse: 122
The backlight technology and driving mode of the display are important factors affecting the display effect and performance. The following is a detailed explanation of the backlight technology and driving mode of the display:
Backlight technology refers to the light source technology used on the back of the display, which directly affects the brightness, color and contrast of the screen. Common backlight technologies include the following:
Backlight technology used in early LCD monitors.
It can provide uniform backlight, but the power consumption is high, and with the development of technology, it is gradually replaced by LED backlight.
LED backlight:
It has become the mainstream backlight technology for modern LCD monitors.
It is divided into two types: direct-type LED backlight and edge-type LED backlight:
Direct-type LED backlight: The LED light is directly installed on the back of the LCD panel, which can provide a more uniform backlight. It is further subdivided into full array local dimming (FALD) and full array micro-zone dimming (FALD Pro). These two technologies can provide different brightness in different areas of the screen, thereby improving the contrast and black display effect.
Edge LED backlight: The LED light group is installed at the edge of the LCD panel, and the light is distributed to the entire screen through a light guide plate or lens. This method is usually thinner than direct-type LED backlight, but there may be certain challenges in the uniformity of the light source.
Other new backlight technologies:
Such as quantum dot LED (QLED) backlight, by adding a layer of quantum dot reinforcement film in front of the WLED light source, the characteristics of the quantum dot film are used to improve the color expression and color gamut coverage.
RGB-LED backlight, using red, green and blue LEDs to produce broad-spectrum white light, theoretically more standard color, but the cost is high and gradually withdrawing from the mainstream market.
The driving method refers to the method of controlling the brightness and color of each pixel or LED light on the display. Common driving methods include the following:
Each LED pixel or each point on the display requires an independent drive port to control.
The control method is simple, but it requires a large number of IO ports and is more expensive. It is suitable for small-area or low-resolution display screens.
Including dynamic row drive, dynamic dot matrix drive and other methods.
The brightness and color of each pixel or LED light can be controlled by time-sharing control or setting a time sequence.
It can save the number of IO ports, but requires high control accuracy and complex control logic.
It combines the characteristics of static scanning and dynamic scanning.
Each row and column of LED lights are controlled by independent control lines, and full-color display is achieved by coordinating the control lines of each row and column.
It requires fewer pins, and can also achieve a high refresh rate and good display effect, but the cost is high.
Commonly used in indoor full-color display screens.
The brightness and color of LED lights are adjusted by controlling the current.
It has the advantages of good stability, uniform brightness, and bright colors.
In summary, there are various backlight technologies and driving methods for display screens, and each technology has its unique advantages and applicable scenarios. When choosing a display screen, it is necessary to comprehensively consider factors such as specific application requirements, display effects and costs.
TFT LCD Displays product links for reference:
https://www.youritech.com/products/tft-displays/
Shenzhen Youritech Technology Co.,Ltd. focuses on the research and development ,design ,customization and production of LCD,OLED,touch screen and other products.
website:https:www.youritech.com
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