Seiko Epson Corporation

HTPS is an abbreviation of High Temperature Poly-Silicon. It is an active matrix transmissive LCD. It is superior to other types of LCDs in that it is smaller, has higher resolution and higher contrast, and can have embedded drivers. The main use of HTPS is as a light valve for projectors.

There are various kinds of LCDs. Each type of display is used according to its particular characteristics.

HTPS is one kind of TFT and is mainly used as a core device of projectors and electronic view finders.

In each pixel of the HTPS there is a thin-film transistor (TFT) made of poly-silicon. These pixel transistors act as a conduction switch by changing the scan line's voltage.
It is produced in the same way as semiconductors. It is small and highly reliable because it can be easily miniaturized by processing at a high temperature, and drivers can be created directly onto substrates.