A company that makes LED screens concentrates on one unit in the ecosystem of LED displays. It can involve the manufacturing, marketing, and sales of LED screens as well as setting them up. An LED display manufacturer can be described as a company that produces all kinds of LED screens like compact indoor sign displays or gigantic outdoor digital video walls. These companies spend a lot of money in research and development for advanced LED technologies like greater pixel density and improved screen energy efficiency. Custom vertical LED screen makers buy parts from several suppliers and sell them to clients from all sectors. These companies take care of the mounting of the LED screens which include video calibration and integration with other systems. Most screen companies also provide post-sale aid like servicing and maintenance and repair to build lasting relationships with their customers.