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How to calculate LED viewing distance? What is the best viewing distance for LED?

Optimal Viewing Distance
Optimal Viewing Distance

As a professional LED display supplier with 10 years of sales experience, I often hear customers from all over the world ask questions like, “How to calculate LED viewing distance?”, “What is the best viewing distance for LED ?”

LED viewing distance Video introduction

We can use the simplest method to understand the viewing distance of the LED display. When the LED screen salesperson introduces the model of the display to you, this is the ideal viewing distance for the LED display.

For example, if the screen LED salesperson tells you, “This is a P4 rental LED display, suitable for stages, concerts…”, then the ideal viewing distance of this product is 4 meters. On this basis, It can also be appropriately expanded by 1.5-2 times, that is, within 6–8 meters, it can show its excellent viewing effect.

After understanding this point, we will further discuss some calculation methods of LED displays, and provide some suggestions on the viewing distance of indoor and outdoor LED displays and how to choose the appropriate pixel pitch. In addition, we will also discuss how to calculate the resolution and size of the LED display.

The first thing we need to understand is the concept of PPI (Pixel per inch). PPI indicates the number of pixels per inch of LED display screen, the higher the value, the clearer the displayed image. Generally speaking, the human eye cannot distinguish individual pixels for displays with a PPI of more than 300.

When we look at a LED display screen, the resolution ability of the human eye is limited. When the pixels are too dense, the human eye cannot distinguish individual pixels and thus perceive a continuous, seamless image.

When it comes to LED displays, PPI (Pixel per inch) is usually used to describe the number of pixels per inch of the display. However, we can also convert this to pixels per square meter to better fit LED display metrics.

The formula to convert PPI to pixels per square meter is as follows:

Pixels per square meter = PPI × 0.0254 × PPI × 0.0254

In this formula, we use 0.0254 to convert inches to meters, then multiply (square) the PPI twice to get the number of pixels per square meter.

For example, if an LED display has a PPI of 300:

Pixels per square meter = 300 × 0.0254 × 300 × 0.0254 = 22955

Therefore, the LED display has about 22955 pixels per square meter.

By converting PPI to the number of pixels per square meter, we can more intuitively understand the pixel density and resolution of the display screen for more accurate evaluation and selection.

Now, let’s answer the following questions step by step:

What is the viewing distance of LED display pixels?

The LED display pitch viewing distance of will vary greatly according to different application scenarios. The following are some common application scenarios.
Indoor meeting rooms, exhibitions, shopping malls, etc.: For close viewing (within 3 meters), you can choose a smaller pixel pitch, such as 1mm to 2mm.
Billboards, outdoor large screens, etc.: For a longer viewing distance (more than 5 meters), you can choose a larger pixel pitch, such as 4mm to more than 10mm.
Traffic signs, outdoor display screens, etc.: require a shorter viewing distance and higher definition, you can choose a display screen with a smaller pixel pitch, such as 2mm to 4mm.

Visual requirements:

Visual requirements are also one of the considerations in choosing pixel pitch. For scenes that require high definition and details, such as image display, video playback, etc., it is usually necessary to choose a smaller pixel pitch to provide higher resolution and clarity. For some simple text display, basic graphics and other scenarios, you can choose a larger pixel pitch.

It should be noted that the above are some general guidelines, and the actual selection of pixel pitch also needs to consider the technical characteristics of specific products, budget constraints and application requirements. It is best to consult a professional JYLED display supplier or engineer, and choose according to the specific situation.

How to calculate the best viewing distance?

The best viewing distance depends on the size of the LED display, its resolution and the viewer’s expectations for the image. Generally speaking, if the viewing distance is less than the ideal viewing distance, the viewer may perceive pixels, while at greater than the ideal viewing distance, the image may appear blurry.

The formula for calculating the ideal viewing distance in PPI is:

Ideal viewing distance (feet) = screen height (inches) / PPI

What is the best viewing distance for LEDs?

In order to get the best viewing effect, the viewing distance of the LED display should be twice its ideal viewing distance. This ensures that viewers can fully appreciate high-quality image details.

What is the viewing distance for indoor and outdoor LED displays?

There will be some differences in the viewing distance between indoor LED and outdoor LED displays, because there are lighter interference and visual requirements in the outdoor environment. The following are the general viewing distance ranges for indoor and outdoor LED displays (for reference only):

a. Indoor LED viewing distance:

  • – LED display with P1.5-P3 pixel pitch: the best viewing distance is 1–3 meters, the maximum viewing distance is 3–6 meters, and the long-distance viewing is more than 6 meters.
  • – LED display with P4-P5 pixel pitch: the best viewing distance is 2–5 meters, the maximum viewing distance is 5–10 meters, and the long-distance viewing is more than 10 meters.

In indoor environments, the light is more controlled and stable, and viewers can usually watch LED displays at a closer distance for higher pixel density and clearer images.

b. Outdoor LED viewing distance:

In outdoor environments where the light is bright, the viewing distance will increase accordingly. The viewing distance of an outdoor LED display depends on factors such as pixel pitch, lighting conditions, and audience requirements. The following are some common outdoor LED display viewing distance ranges (for reference only):

– Outdoor LED display with P5-P10 pixel pitch: the best viewing distance is 5–10 meters, the maximum viewing distance is 10–20 meters, and the long-distance viewing is more than 20 meters.

There is stronger ambient light interference in outdoor environments, and a larger viewing distance can help viewers better appreciate image details and reduce the impact of light on visual experience.

Note that these viewing distance ranges are general guidelines only, and actual viewing distances will be affected by LED display size, resolution, content type, and personal preference of the viewer. When selecting and installing an LED display, it is recommended to test and adjust according to the specific situation to ensure that the audience has the best viewing experience.

How to choose the appropriate pixel pitch?

Pixel pitch refers to the distance between two adjacent pixels (lights), which directly affects the viewing effect. For example, if the pixel pitch is 10mm, then if the viewing distance is less than 10 meters, you will see obvious lamp beads when viewing, thus affecting the viewing effect.

To choose the appropriate pixel spacing, we should consider the following points:

  • A. Viewing distance: As mentioned above, viewing distance and pixel pitch are closely related. Therefore, determine the viewing distance to choose the appropriate pixel spacing.
  • B. Image detail requirements: There are some models of LED displays that can be used in between. For example, if the viewing distance is 5 meters, both P4 and P5 model LED products can achieve good results, but if you choose the P4 model, the image clarity will be higher.
  • C. Usage environment: For the same model, if the usage environment is different, the price will vary greatly. If it is used outdoors, issues such as waterproofing, dust proofing, and brightness need to be considered, so the outdoor price is often much higher than the indoor price.

Through the above three points, we can choose the pixel spacing that suits us. Of course, in actual application, you must also consider the installation angle, installation scene, etc. It is recommended that you communicate with our professional engineers in order to choose an LED display with the best pixel pitch.

How to calculate the resolution and size of LED display?

The resolution and size of LED displays depend on the required pixel density and available space. Resolution is measured in pixels with the formula: W*H (Width * Height). Based on the resolution and ideal viewing distance of the LED display, we can calculate the appropriate LED display size. Let’s introduce some commonly used LED display calculation methods:

Resolution calculation:

– Resolution refers to the number of pixels in the horizontal and vertical directions of the LED display. For example, 1920×1080 is what we usually call 1080P. Applying the above formula, we can get a width of 1920 pixels and a height of 1080 pixels.

Size calculation:

  • – LED display size can be expressed in physical dimensions (such as inches or centimeters) or number of pixels.
  • – To calculate the physical size, two parameters, pixel pitch and resolution, need to be known. The formula for physical dimensions is: width (in pixels) times pixel pitch (in millimeters or inches)

The above method may have some deviations in actual calculations. Therefore, for more complex application scenarios, calculations need to be performed with the help of LED display manufacturers.

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