With the wide application of LCD technology, LED backlight has become an indispensable and important part of all kinds of display devices. A high-quality backlight system not only enhances brightness and display effect, but also enhances user experience and device performance. So, how should customers judge the quality of LED backlight when purchasing? This article will analyze What is LED Backlight Technology and its core component – light guide plate, bring you to understand how does LED backlight work , and how to choose the right materials and suppliers.
What is LED Backlight Technology?
LED backlight technology is through the light-emitting diode (LED) to provide a light source, combined with the light guide plate, diffusion film, reflective film and other optical materials, point light source or line light source into a uniform surface light source, for the LCD screen to provide a stable, uniform backlight support.
Compared to the earlier CCFL (Cold Cathode Fluorescent Lamp) technology, LED backlighting has the following significant advantages:
*High brightness, low energy consumption, green and environmentally friendly non-mercury components
*Fast response time, suitable for dynamic picture display
*Thin and light structure, conducive to equipment miniaturization
*Long life and high stability
Therefore, LED backlight technology is widely used in TVs, notebooks, car displays, medical equipment, advertising light boxes and other industries.
How Does LED Backlight Work?
A complete LED backlight module usually includes the following core structure:
1)LED light source: emits directional light, installed on the side or back of the light guide plate;
2)Light Guide Plate : Converts the linear light emitted by the LED into a uniform surface light source;
3)Diffusion film and brightness enhancing film: break up light spots and enhance front view brightness;
4)Reflective Film: Reflects underutilized light and improves overall brightness;
5)Backplate and structural frame: fixing optical materials to ensure stable operation of the module.
The role of the light guide plate is particularly critical, it is through the bottom of the micro-structure of the light guide point, control the refraction, reflection and light direction, so as to achieve uniform brightness, no light leakage of the display effect.
The light guide plate determines the key to the performance of the backlight system
In the LED backlight, the performance of the guide plate directly determines the brightness distribution, energy efficiency and service life. Currently the mainstream light guide plate manufacturing process includes:
Screen printing light guide point: applicable to conventional brightness requirements;
Laser engraving light guide plate: more uniform light effect and higher precision;
Injection molding micro-structure light guide plate: applicable to ultra-thin, high brightness devices;
Micro-prism/micro-lens light guide plate: provide high quality optical performance for high-end products.
Light guide plate material is usually selected optical grade PMMA (acrylic) or PC plate, with high light transmission and excellent thermal stability.
How do customers choose the right LED backlight material?
When purchasing LED backlight panel, it is recommended to evaluate from the following aspects:
1)Does the light guide plate produce light evenly?
2)Is the optical film material (diffusion film, light-enhancing film) reasonably matched?
3)Is the structure compact and does it have the ability to resist thermal deformation?
4)Does it support customized size and optical design?
At the same time, it is recommended to cooperate with experienced suppliers to ensure stable product quality and controllable delivery time.
We are a Professional Light Guide Plate Manufacturer
As a professional supplier of light guide plate materials, we are committed to providing customers with high-quality LED backlighting solutions, support a variety of sizes and shapes customized, the service covers a variety of industries, such as notebooks LGP, advertising light boxes, medical equipment, vehicle displays and so on.
We offer:
*Customized light guide plate (size, thickness, and design of light guide point can be customized)
*Full set of backlight module components: light guide plate + reflective film + diffusion film + intensifier film
*Support OEM/ODM to meet the needs of small, medium and large quantities.
*Cooperate with professional light guide plate manufacturers to ensure stable optical performance and quality.
