In modern LED displays, the backlight is a crucial factor influencing image quality, brightness, contrast, and the overall display effect. Choosing the right type of backlight can significantly enhance the visual experience, and a suitable LED display can help double your business volume. This article will discuss the backlight technologies commonly used in LED displays and help you understand which type of backlight is more suitable for your needs.
1. Edge – lit Backlight
Working principle: The edge – lit backlight technology arranges LED lights around the perimeter of the display. The light is evenly distributed across the entire screen through a light – guide plate. It is suitable for ultra – thin displays due to its very compact design.
If you are after a thin and light design and have a limited budget, the edge – lit backlight is a good choice. It is suitable for most home TVs and indoor office LED monitors.
However, since the light source is only at the edges of the screen, the brightness uniformity can be affected. In particular, there may be uneven brightness in dark scenes.
2. Direct – lit Backlight
Working principle: The direct – lit backlight places LED lights directly on the back of the LED display. The light shines directly onto the display panel, providing more uniform brightness compared to the edge – lit backlight.
If you have high requirements for the display effect, especially in terms of color and brightness uniformity, the direct – lit backlight would be a good option. It is suitable for mid – to high – end LED monitors.
Due to the need to arrange multiple LED lights on the back, the display is slightly thicker and is more suitable for fixed installation. It is also more expensive than the edge – lit backlight.
3. Local Dimming Backlight
Working principle: The local dimming technology can automatically adjust the brightness of the backlight according to different areas of the displayed content. For example, in dark areas, the backlight will be dimmed, resulting in deeper blacks.
If you are enthusiastic about watching movies, playing games, or engaging in multimedia creation, the local dimming backlight can enhance the image contrast and detail performance of the LED display, making the picture more realistic and vivid.
However, the local dimming backlight has a relatively high cost, and occasionally, a halo effect may occur, affecting the overall naturalness of the picture.
4. Full – array Backlight
Working principle: The full – array backlight technology evenly distributes a large number of LED lights on the back of the display and can precisely adjust the brightness according to the needs of different areas, improving the picture quality.
The full – array backlight is suitable for users with high requirements for picture quality, especially film and television enthusiasts and professional image workers. The LED display with this type of backlight can provide more accurate brightness control and contrast.
Compared with other backlight technologies, the full – array backlight is more expensive, and the LED display will also be thicker.
5. Cold Cathode Fluorescent Lamp (CCFL) Backlight
Working principle: The CCFL backlight uses cold cathode fluorescent tubes to emit light, and the light is evenly distributed through a light – guide plate. This technology is outdated and was once widely used in old – style liquid – crystal displays.
Currently, the CCFL backlight has been gradually replaced by the LED backlight and mainly remains in some older displays.
The CCFL backlight has low energy efficiency, a short lifespan, and contains mercury, which has a certain impact on the environment. That’s why it has been gradually phased out.
6. How to choose the right type of backlight?
The key to choosing the right backlight type for an LED display is to balance image quality and cost according to your needs. If you value an ultra – thin design and have a limited budget, the edge – lit backlight is a good choice. If you have high requirements for the LED display effect, especially in terms of image brightness and contrast, you can choose the direct – lit backlight or the full – array backlight. If you are a movie lover or a gamer, the LED screen with a local dimming backlight can give you a more realistic picture – viewing experience. With the development of Mini – LED and Micro – LED technologies, there will be more efficient, environmentally friendly, and better – performing backlight types for LED displays to choose from.
Post time: Feb-14-2025