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