When you are purchasing video playback equipment for the company’s meeting room or the school’s classroom, you might not know whether to choose a projector or to opt for the LED wall service. This article will provide you with a detailed explanation and will help you make a better decision.
What Is a Projector？
The projectors’ working principle is very simple. There is a screen facing the audience. It does not emit light itself, but can reflect any light projected onto it. The light’s real source is located at a certain distance from the screen: the projector. The projector’s bulb projects the image onto the screen, and the screen then reflects the light to the audience’s eyes.
The bulbs used in projectors are consumables. Once they fail, new bulbs need to be replaced. The bulbs generate heat while working, which shortens their own lifespan and usually requires a fan to cool them down.
What Is an LED Wall?
Countless small light-emitting diodes are composed to become an LED wall. Three LED lamps are combined together, each emitting red, blue, and green light, respectively. When these three colors are mixed in a specific proportion, they can form various colors.
Unlike the projector’s screen, when these light-emitting diodes are subjected to voltage, they will emit light by themselves rather than reflecting external light. Light-emitting diodes can efficiently convert electrical energy into light energy, with only a small portion being converted into heat energy. Therefore, the LED wall is more energy-efficient and easier to dissipate heat compared to other display screens.
LED Walls vs Projector: Differences in Image Quality
Difference in Luminance
The bulb in a projector can achieve very high lumen. However, this data only reflects the brightness output by the projector bulb, not the brightness which is perceived by the audience with their naked eyes.
Projector screens have a strong ability to reflect light. But they have a drawback: they cannot distinguish which light is emitted by the projector and which is emitted by the surrounding environment. They will reflect all the light that shines on them. They cannot be used in brightly lit indoor spaces or sunny outdoor days because when the ambient light is abundant, the image quality will be greatly reduced.
The image will be interfered with by various other lights, becoming dim and difficult to distinguish colors. In areas with strong ambient light, the performance of a 3000-lumen projector may actually be inferior to that of a 600-nit LED wall. When choosing a video playback device for an indoor space with abundant lighting, you should take this into account and carefully select a projector.
The LED wall does not rely on the reflection by a screen; instead, it emits light by itself. Therefore, it can achieve extremely high brightness, and even in outdoor environments exposed to direct sunlight, it can still suppress ambient light and maintain the clarity.
Difference in Viewing Angles
The projector has only one bulb, so most light is reflected by the screen in a specific direction. This direction is the optimal viewing angle for the projector. The further away from this angle, the less light from the projector reaches the audience, and the picture will become dull with less vibrant colors.
Therefore, the projector viewing angle is relatively narrow. People sitting on the side of the screen might even be unable to recognize the image.
In contrast, the LED lamps on the LED wall emit light by themselves, and the light can directly enter the viewers’ eyes without having to be reflected by the screen. This provides the LED wall with a very wide viewing angle, which can reach over 160 degrees. You can even use a curved LED screen to further enhance the viewing angle.
Difference in Contrast Ratio
If you want to test the contrast ratio, the best way is to observe its performance in handling black and white images. The greater the difference in brightness between the black image and the white image, the more distinct the contrast between the bright and dark parts will be.
The projector screen is usually white or gray in color. This is because these colors can better reflect light rather than absorb it. However, this also means that it cannot display pure black. The black in the image always turns gray on the projector’s screen, failing to provide the audience with vivid colors.
The background panels of most LED walls are black. When the LED wall shows black, it can directly turn off the light-emitting diodes, making the black color closer to pure black and presenting distinct colors with clear gradations. Furthermore, the self-luminous property enables the LED wall to remain unaffected by the backdrop and accurately display various colors.
Difference in Stability
The images produced by the projector are very susceptible to interference. When someone passes in front of the screen, the projector’s light will fall on that person, thereby creating a shadow on the screen. The room where the projector is located must be free from any wind, otherwise the wind will cause the screen to sway back and forth, resulting in a shaky image. Furthermore, since the projector’s bulb generates a large amount of heat, it cannot be used for too long at one time to avoid excessive heat affecting its internal structure.
The LED wall, however, does not have this problem at all. Its LED lamp can operate stably for a long time and is hardly affected by external factors. After undergoing protective treatment, the outdoor LED wall can withstand direct sunlight, wind and rain.
LED Walls vs Projector: Differences in Cost Performance
Difference in Flexibility
Many LED screen modules form the LED wall. This means that you can change its size at will according to your needs, just like building with building blocks. Whether you want a round LED display or a triangle LED screen or any other shapes, the LED wall can meet your requirements.
The image shape formed by the projector is usually fixed as a rectangle, and the picture cannot be infinitely enlarged because the size is not only limited by the screen size but also by the bulb brightness.
The projector bulb brightness is fixed. This means that when you replace a larger screen and move the projector further away from the screen in an attempt to enlarge the image, the amount of light allocated to the fixed area will decrease. As a result, you will notice that the projector image brightness diminishes as the size increases.
Difference in Installation Cost
The installation cost of the projector is lower than that of the LED wall. Because you only need to install the screen in an appropriate position and then fix the projector at a suitable distance. The projector is very small in size and can be carried by one person, which significantly reduces the labor costs.
The LED wall requires multiple LED display module assembly and subsequent debugging. Its cost depends on the pixel pitch. The smaller the pixel pitch, the higher the cost. You can choose the appropriate pixel pitch based on the optimal viewing distance to reduce the installation cost.
However, projectors need to be kept at a certain distance from the screen, which requires that the room where they are placed should have sufficient depth. In contrast, LED walls do not have this concern.
Difference in Maintenance Cost
The projector bulb lifespan is shorter than the LED lamp lifespan, and it often needs to be replaced. Projectors also come with various accessories, such as dust-proof filters and cooling fans. These components need to be cleaned and maintained regularly, which increases the maintenance cost.
Furthermore, you may find that you need to purchase additional blackout curtains to achieve a better picture quality with the projector.
You will find that maintaining the LED wall will be much simpler.
Firstly, LED lamps have a very long lifespan, so you don’t need to frequently repair or replace them.
Secondly, the LED wall is composed of many independent LED display modules. When one module fails, you don’t need to dismantle the entire LED wall; instead, you only need to replace the faulty module.
Most LED walls support hot swapping, which means you don’t even need to power off or shut down the LED wall during maintenance, making the maintenance much more convenient.
FAQ
Why Are the Parameter Units of Projectors in Lumens, but Those of LED
Walls in Nits?
Because the projector has only one bulb, the light source it generates is a point source. The power of this point source is measured in lumens. While the LED wall is a surface light source, its brightness is measured in nits.
You can convert lumens to nits by multiplying the projector’s lumens by the gain coefficient of the screen, then dividing by the conversion coefficient and the product of the screen size.
Which Device Can Help Me Increase the Utilization Rate of the Venue?
The LED wall enables viewers seated on the side of the equipment and directly below it to clearly see the content. This means you can arrange more seats in one venue.
Which Device Can Display Colors More Accurately?
The LED lamps on the LED wall can accurately display the colors, while the color projected by the projector is affected by the surrounding ambient light and the color of the screen itself, resulting in inaccurate colors.
Which Equipment Would be Better to Choose for the Potential Expansion Site?
You can choose the LED wall, as it can be freely expanded in size.
Which Device Is More Convenient for Demonstration?
LED wall. Because the presenter can freely point to the area being explained with their finger. The projector will cause the presenter’s arms to cast shadows on the screen. Furthermore, you can also utilize interactive LED screens to further simplify the operation.
Final Thoughts
As a professional manufacturer which produces LED screens, JINGYLED can help you create high-quality LED walls. If you have any requirements, please contact us to obtain customized services.
