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Optical Characteristics
Table 5. Optical Characteristics.
Luminance (at screen center)
Contrast Ratio
Color Coordinates
Luminance Non-uniformity
Luminance Control (typical))
Ambient Light Sensor
Viewing Angles
1
The contrast brightness mode regulates backlight luminance via feedback over the life
of the lamps. The lamp and luminance life will vary depending on the chosen controlled
luminance level. For more information, see "Backlight Dimming" on page 20.
6
LC640.480.21-065 Operations Manual (OM610-00)
Standard (typical)
3 cd/m
1
Controlled (typical)
3 cd/m
Dark room ambient
150: 1 typical, 80:1 minimum
500 Lux ambient
92:1 typical
5K Lux ambient
12:1 typical
20K Lux ambient
4:1 typical
White field
x = .362 typical; y = .370 typical
25% maximum
With a white screen, max difference between any 2 of 5
points is defined as follows:
Lnu (%) = (1- (Lmin/Lmax)) x 100%
Dimming range
50:1 initial, 300:1 stabilized (Lmax after > 15 minutes
at max. lum., then Lmin at min. lum; dimming range =
Lmax/Lmin)
Response
Visible light filtered ~420 to 675nm @ 50% pts.
Field of view
±50 degrees typical to half sensitivity
Dynamic range
0 to 3000 Lux typ.; assumes 18% scene reflectance
Horizontal
±50 degrees typ., White/black CR
Vertical
+35/-45 degrees typ., White/black CR
(See Figure 1)
2
2
minimum, 1000 cd/m
maximum (initial)
2
2
minimum, 700 cd/m
maximum
10
10
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