What is the viewing angle of LED display?

34 views admin 2025-05-15

When we look at an object from the front and side, there is often a relatively obvious visual difference. Similarly, when we look at the LED screen from different angles, there are often some subtle and imperceptible differences. Once this difference in viewing angle has a relatively obvious impact on the image quality of the LED screen, it can be easily captured by our naked eyes and cause a decrease in the viewing experience, indicating that our current viewing angle has exceeded the maximum viewing angle of the LED screen. So, what is the viewing angle of the LED screen? What factors affect the viewing angle of the LED screen? Like SMD LED, DIP LED and COB LED, these relatively common LED packaging technologies, do their viewing angles have obvious differences? Now, please follow the editor's footsteps to find out.

The viewing angle of the LED display refers to the angle at which the user can clearly observe all the contents on the screen from different directions, including indicators in both horizontal and vertical directions. ‌‌

Horizontal viewing angle‌ refers to the angle range within which the audience can still view the image normally within a certain angle to the left or right from the vertical normal of the display screen (the vertical imaginary line in the middle of the display screen). ‌

Vertical viewing angle‌ refers to the viewing angle upward or downward based on the horizontal normal of the display screen.

The size of the viewing angle is mainly determined by the packaging method of the LED chip. Different packaging technologies will affect the divergence angle of light, thereby affecting the viewing angle. In theory, the larger the viewing angle, the wider the range that the audience can see, but it may also cause the screen brightness to decrease. For different application scenarios, such as indoor and outdoor LED displays, the requirements for viewing angles are also different. Usually, indoor displays require a viewing angle of more than 120°, while outdoor displays require a viewing angle of more than 140°.

The measurement of the viewing angle is usually based on the contrast change as a reference standard. When the observation angle increases, the contrast of the displayed image will gradually decrease. When the contrast drops to 10:1, this angle is the maximum viewing angle of the LED display. Therefore, the optimization of viewing angle is actually the pursuit of the best balance between contrast and viewing angle.

The viewing angle of LED display screens is related to multiple factors, including LED chip packaging, viewing angle and distance, pixel density, lamp bead arrangement, brightness, LED display module and manufacturing process, ambient light intensity, panel design, surface treatment technology, and the fineness of manufacturing process. ‌

LED chip packaging method‌: The size of the viewing angle is mainly determined by the packaging method of the LED chip. Different packaging technologies will lead to different light scattering angles, which will affect the viewing angle.

Viewing angle and distance‌: The viewing angle is related to the angle and distance of the viewer. In theory, the larger the viewing angle, the wider the range that the audience can see.

Pixel density‌: The higher the pixel density, the audience can still clearly identify the image at a larger angle.

Lamp bead arrangement‌: Different lamp bead arrangements will affect the viewing angle. For example, the lamp bead arrangement method using SMD packaging usually has a wider viewing angle.

Brightness: There is a trade-off between brightness and viewing angle. The higher the brightness, the more light scattering and refraction may occur, resulting in a reduced viewing angle.

LED display modules and manufacturing processes: High-quality LED display modules and sophisticated manufacturing processes can provide a wider viewing angle. Manufacturers can improve the viewing angle of the display by optimizing the optical design and reducing light scattering and reflection.

Ambient light intensity: When used outdoors, strong ambient light may cause the image brightness of a full-color LED display to be insufficient and lose its viewing value. Proper sun protection measures are essential to provide a good viewing angle.

Panel design: Different panel designs determine the way and range of light scattering on the screen. For example, some advanced LED folding screens use a wide-angle design, which optimizes the propagation path of light so that a clear picture can still be maintained at a larger angle.

Surface treatment technology: Some screens use special coatings or surface treatment technologies that can effectively reduce the reflection and scattering of light and improve the contrast and clarity of the picture. This processing technology enables the LED folding screen to maintain high brightness and color reproduction at a larger viewing angle.

The sophistication of the manufacturing process: The sophistication of the manufacturing process will also affect the viewing angle. Some manufacturers will improve the viewing angle of the LED folding screen by optimizing the optical design to reduce light scattering and reflection.

It can be seen that the viewing angle of the LED display is the result of the combined effect of multiple factors. By optimizing these factors, the viewing angle of the display can be improved, thereby enhancing the audience's viewing experience.

SMD LED: It has a wider viewing angle and more uniform color performance. SMD (surface mount device) technology allows multiple chips to be integrated in one package, which increases pixel density and is suitable for high-definition display. The viewing angle of SMD LED displays is usually around 140°, which allows viewers to view the screen content from a wider angle while maintaining good color performance and image quality.

DIP LED: The viewing angle is generally between 100-110°. The lamp beads of DIP (dual in-line package) display screens are made by wave soldering. In the early stage, the red, green and blue lights were inserted into the PCB to form an RGB pixel. Since the production organization of DIP display screens is relatively complex, it is not easy to implement mechanized production and the production efficiency is low, so the viewing angle is not as wide as that of SMD and COB display screens.

COB LED: The viewing angle can reach 160° or even higher. COB (chip-on-board packaging) technology fixes the LED chip directly on the PCB board and then encapsulates it with epoxy resin to form a module. This packaging method does not require mask protection, the left and right viewing angles are increased, and a wider viewing angle is provided, allowing viewers to view the screen content from a wider angle while maintaining good image quality. 12.

In summary, SMD LED displays provide a wider viewing angle and uniform color performance, while COB LED displays provide the widest viewing angle, which is suitable for application scenarios that require a wide vie