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LCX021AM View Datasheet(PDF) - Sony Semiconductor

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LCX021AM Datasheet PDF : 24 Pages
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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°.
Left
Center
Right
Optimum angle of incidence
6.0 ± 0.5°
Optimum angle of incidence
6.0 ± 0.5°
Pad
(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.
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