yes

An eggcrate display is a display technology that consists of a matrix of light bulbs, usually incandescent. Behind the matrix lies a foam backing with a series of indentations to accommodate the bulbs, which resembles the indentations in an eggcrate. Most eggcrate displays use a complete 5×7 matrix for each digit, permitting the display of nearly all alphanumeric characters. Some variants exist that can only display numbers, but require fewer bulbs. This type of eggcrate display is popularly used for sports scoreboards. Two types of eggcrate displays have been used on game shows because other types of displays, such as light-emitting diode seven-segment displays, were prone to being washed out by bright studio lights.

Diffuser - band - was created in 1994.

They arent - its just a cooincidence that they look like soundproofing materials called 'eggcrate'.

A diffuser is often used in scanning technology.

A fax is a combination of a scanner, printer, and phone modem - the diffuser helps with image quality from the scan of the document.