What is a Micro Display

A Micro display is a display too small for direct viewing. They are usually used together with an optical system. Some micro displays are also called “Spacial Light Modulators”. Typical consumer applications are projectors and electronic view finders. Micro displays can also be used in a variety of applications like holography, pulse shaping, research and medical.

Micro Display Types

• Transmissive LCD:   For projector applications transmissive LCD panels are typically monochrome. For color projectors 3 displays and a color combining optics is used. Some transmissive LCD’s are avalilable with mosaic color filters for electronic color view finders.

• Reflective LCD: LCOS SXRD Reflective LCD’s are typically used together with a polarizing beam splitter that separates the incoming and outgoing light path. For color projectors depending on the type of LCD, 3 displays and a color combining optics or color sequential operation is used.   Reflective LCD’s are also used for electronic view finders typically in color sequential operation.

Micro OLED

Micro OLED is typically used for electronic view finders. It is self emitting. Light output is normally not sufficient for projection.

DLP  

A DLP display includes an array of micro mirrors that can fastly switch between 2 positions. Gray scale and color is modulated by the temporal ratio the mirrors stay in the on or off position. DLP displays can be used for projection and direct viewing. For smaller system color sequential operation is usual.
For highest light output like cinema projectors 3 DLP and a color combining optics is used.

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