2 Types of TFT-LCD Backlight

Views : 518
Author : China TFT-LCD supplier
Update time : 2019-10-09 10:46:36
There are two common TFT-LCD backlight options: LED backlight and CCFL backlight.

1. CCFL backlight.

Cold cathode fluorescent lamp (CCFL) is a kind of AC driven backlight, which needs inverter to convert DC to AC. Ac signals and inverters may produce EMI (electromagnetic interference) and arcs; for intrinsically safe products, arcs must be eliminated.

CCFL is still available, but is becoming a legacy (obsolete) component. TFT displays with CCFL require a higher MOQ (minimum order quantity) than LED backlight displays.

If this is a new design, it is recommended that you choose LED as the backlight option.

2. LED backlight.

LED backlight is driven by DC and is the most commonly used backlight technology in TFT. There are two different LED backlight options: RGB and white.

a. RGB LED backlight.

Red, green, and blue (RGB) backlight consists of one LED that produces red, green, and blue colors or three separate red, green, or blue LED.

The RGB backlight requires a controller to adjust the different intensity of each color. The function of the controller is to combine the unique red, green and blue levels to produce any of the 64m different colors.

b. White LED backlight.

White LED is actually a blue LED, with yellow phosphor that gives the impression of white light.
Related News
Read More >>
Market Prospect of Outdoor LCD Advertising Machine Market Prospect of Outdoor LCD Advertising Machine
May .25.2022
The outdoor LCD advertising machine uses LCD monitors to play video advertisements, which is especially suitable for the comprehensive multimedia technology of high-end brands to deliver a full range of product information and promotional information to consumers. Different from newspapers, magazines, radio, television and other media, LCD advertising machine has a wide range of applications and remarkable effects.
Comparison of 3 Different Models of BOE 18.5-inch LCD Screen Comparison of 3 Different Models of BOE 18.5-inch LCD Screen
Apr .21.2022
There are 3 outstanding models of BOE's popular 18.5 inch LCD screen, namely the DV185WHM-NM1, QV185FHB-N81 and MV185WHB-N20, of which the MV185WHB-N20 is available in both normal and high brightness versions. So what's the difference among them?
3 Common Problems of Using Capacitive Touchscreen 3 Common Problems of Using Capacitive Touchscreen
Feb .24.2022
Users may encounter some problems when using capacitive touch screens. When using it for the first time, the user first correctly installs the driver needed for the capacitive touch screen according to the requirements of the relevant instructions, and then runs the screen calibration program to calibrate the screen. In fact, the touch screen will be calibrated before it leaves the factory, so end users don't have to worry. In addition, users may encounter the following three situations when using a capacitive touch screen.
3 Differences Between Assembly LCD Module and Original LCD Screen 3 Differences Between Assembly LCD Module and Original LCD Screen
Feb .17.2022
In the LCD display screen industry, LCD has been called two ways, one is the assembly LCD module, the other is the original LCD screen. Do you know the difference between them? To sum up, there are three main obvious differences.
Know more about LCD technology?