Why are black lit pixels in LED displays not turned off?

 A lot of people ask about the black pixels in LED displays and why they are turned on all the time even when there is no image, so I wanted to share this knowledge that I learned from one of our partners at AVR Expos in San Diego, CA, who specialize in audio visual rentals, staging and production equipment.

What are black lit pixels?

A Video Wall is a screen that is made up of smaller screens. These screens are connected by a computer program. The video wall is then used to display images or videos. It can be controlled by one person on the computer, or it can be controlled by multiple people in different places at the same time. The individual screens that make up the video wall can either show one image or video, or they can show multiple images or videos at the same time.
The individual screens that make up the video wall are called LED Displays. To create an effect of light coming from inside of these displays, designers often use black lit pixels. Black Lit Pixels look like normal LEDs (light emitting diodes) until they receive an electrical charge. The color of black lit pixels will change based on how much voltage they receive. When voltage is low, black lit pixels will appear as dark red and orange. When voltage increases, the pixel will turn white.
Black Lit Pixels also come in other colors such as green, blue and purple which can be used for any kind of event design needs.
The reason why some people don’t turn off black lit pixels when using video walls for events is because many hotel guidelines say that you need to leave your lights on during overnight hours so security guards know what’s happening with the building at all times; this means lights cannot go out during the night hours which would result in no power being provided to your video wall which could cause damage to equipment or software programming malfunctions

How do they occur?

A video wall is a display composed of a number of television sets, computer monitors or other video sources, set close together. In the past these were made up of CRT TVs but now they are more commonly composed of LCD panels, plasma screens and LED displays. TV manufacturers have started to use the term video wall to describe anything where there is a group of televisions or monitors that can be used for displaying images, including large-screen televisions with built-in DVD players and other home theater equipment. The term also applies to any type of screen that has been installed as part of an architectural feature such as hotel walls and lobby partitions. Orlando Audio Visual Rentals experts at SD AV rentals know what it takes to make your event successful!

What causes them?

Black pixels in an LED display can be caused by a number of different factors. The most common reason for black pixels is due to the video wall configuration. For example, if you have three screens showing the same content and the video wall is set up with the screens arranged in a vertical row, then each screen will show two thirds of the screen but there will be one third that doesn’t show anything at all because it is blocked from view. In this configuration, it’s possible for some LEDs to go out as they sit behind another screen which prevents them from receiving power or signal. However, video walls configured horizontally do not suffer from this problem because they are split into two rows with each pixel shown on both monitors.
A second reason for pixel burnout is an individual pixel actually dying. It may seem surprising that only one single pixel would die; however, many people often forget about things like dust accumulation on the monitor over time which reduces visibility in certain areas and can cause issues such as overheating of specific parts of the panel or liquid damage to sensitive components -both leading to screen death . Finally, a last cause for pixels burning out could be due to interference between panels; for example when plasma screens were first introduced, manufacturers found it difficult to make panels without creating unwanted dots on other panels next to them-also known as image retention.

How to fix them

With the thousands of events across the United States we have assisted with, our knowledge of hotel guidelines and procedures has given us insight on how to get your event running smoothly. One of the most common mistakes made by event planners is forgetting to turn off video walls before an event. Black lit pixels, also called phantom or floating video wall, can be a hazard for projectionists and other technicians working behind the screens. It can also cause light pollution if your event is on property that is near a residential area. These issues can be avoided by taking just a few extra steps during set up and teardown. First, when you plan your event check with the venue about their specific requirements for lighting. You might need to dim lights around the room and make sure there’s no red blinking lights from any equipment left on. If you are unsure about something, feel free to contact Orlando Audio Visual Rentals who will happily answer any questions you may have!