Some companies acquire their own projectors whilst others prefer to hire units when required. Where a projector is only going to be used 3 or 4 times a year, them hiring makes good sense. Similarly where a unit is going to be used once or more every month, then purchasing can be justified. The break point between hire and purchase is somewhere in the region of 7 hires per year. Return to questions 8.
Electrical signals turn on individual pixels in a matrix of cells.
Normally there are three sets of panels, one for each of the three primary colours, red, green and blue. LCD technology produces rich saturated colours that are well suited to business presentations. Return to questions 9. There is a single chip that has on the surface an array of tiny aluminium mirrors, each of which represents a single pixel on the screen. Each mirror is hinged and is controlled by its own cell beneath it.