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LCX021AM

Optical Characteristics

1. Microlens outline

The LCX021AM has a single built-in microlens on the substrate side facing the TFT for the three TFT panel

picture elements. This microlens serves the following purposes.

(1)

The microlens converges the incident light striking the LCD panel to the dot aperture in order to improve

the effective aperture ratio and increase the display brightness.

(2)

The microlens provides a color representation by distributing the light flux for each of the three primary

colors R, G and B which strike the panel at different angles to the dot apertures corresponding to each

color.

This allows the light utilization efficiency to be improved by eliminating the light absorption by the color filter,

which had been unavoidable with conventional single panel projectors.

2. Recommended lighting conditions

In order to bring out the full light converging effects of the microlens and provide a color representation with

high color purity, the following lighting is recommended.

(1)

The incident light angle of the three primary colors should be as shown in the figure below. The center

light should strike the panel from the panel normal direction, and the left and right light from angles

inclined to the right and left of the panel normal direction. The design optimal angle of incidence is the

range of 6.0 ± 0.5°. However, the optimal angle of incidence may be altered slightly depending on the

panel. Be sure to allow adjustment of the mutual angles of the dichroic mirrors so that the angle of

incidence can be varied within the range of 6.0 ± 0.5°.

Center

Right

Left

Pad

Optimum angle of incidence

6.0 ± 0.5°

Optimum angle of incidence

6.0 ± 0.5°

(2)

Effective light: The normal direction (center light), left light and right light noted above should strike the

panel at an angle of ±3.5° or less. Light with a dispersion angle greater than this value will

strike adjoining dot apertures and cause the color purity to worsen. (See the incident angle

distribution for System

Ι.)

3. Recommended projection optical system

The maximum egress light angle for light passing through the LCD is approximately ±17°. Therefore, setting

the F stop of the projection lens to about 1.7 is recommended in order to maximize the light converging effects

of the microlens and provide a representation with excellent color balance. If the projection lens F stop is larger

than this value, the right and left light are kicked accordingly by the projection lens, thereby reducing the

egress light flux to the screen and the same time shifting the white balance.