SINGAPORE -- This outdoor LED display on Orchard Road in Singapore has been around since 1999, but has since undergone an upgrade. We got a look behind the scenes.

Read moreTake a peek at the tech behind a giant outdoor LED display

Photo by: Shaw Organisation

Behind the screen is a narrow dust-filled corridor lined with display panels connected to power strips.

Photo by: Aloysius Low/CNET

Each panel shares information with the one before it to enable a coherent display.

Photo by: Aloysius Low/CNET

A railing that's accessible by ladder separates the room and enables a technician to service the 5.8 meter (19 feet)-tall display if need be.

Photo by: Aloysius Low/CNET

A few weeks later and the screen has been replaced. The new display is much wider -- and sharper. It's made up of new panels with a pixel density of 10mm, compared with the older screen's 24mm. This means images are much more crisp, even up close.

Photo by: Aloysius Low/CNET

The new panel has a shutter to help block out sunlight to ensure a brighter image.

Photo by: Aloysius Low/CNET

The newer (top) versus the older (bottom) panels.

Photo by: Aloysius Low/CNET

The newer panels are smaller in size since the LED bulbs are set closer.

Photo by: Aloysius Low/CNET

The new panels are more streamlined and come with handles for climbing.

Photo by: Aloysius Low/CNET

Here's what it looks like on the inside, with fans to keep things cool inside each panel box.

Photo by: Aloysius Low/CNET

Here's Shaw Organisation Vice President Terence Heng climbing up to show how easy it is to access the panels for maintenance.

Read more: Take a peek at the tech behind a giant outdoor LED display

Photo by: Aloysius Low/CNET

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