JVC Model 200 Image Light Amplifier Technology, The Hughes-JVC Image Light Amplifier

Chapter 2---System Description

2.4 Image Light Amplifier Technology

Section 2.2 explained how the various units, including the ILA® assemblies, in the Optical System work together to produce the image on the screen. This section focuses mainly on how the ILA® assembly itself works.

An Image Light Amplifier (ILA®) assembly (Figure 2-18) is a device that uses low-intensity images to modulate a high-intensity light through a liquid crystal layer. It is the key component in producing very bright, high resolution images from Hughes-JVC large-screen projectors.

Figure 2-18.The Hughes-JVC Image Light Amplifier®.

Optically, there are two sides to an ILA® assembly with a light blocking layer in the center. On the input side there is a photo- conductive layer where the image from a CRT is focused through a relay lens. This image is electrostatically coupled through the light-blocking layer and mirror to a liquid crystal layer on the output side of the ILA® assembly.

Model 200 Service Manual 2-63