Datasheet
Appendix E. Display Brightness
Two ways have been shown to control the brightness
of this LED display: setting the peak current and setting
the duty factor. Both values are set in Control Word 0.
To compute the resulting display brightness when both
PWM and peak current control are used, simply multi-
ply the two relative bright ness factors. For example, if
Control Register 0 holds the word 1001101, the peak
current is 73% of full scale (BIT D
5
= L, BIT D
4
= L) and
the PWM is set to 60% duty factor (BIT D
3
= H, BIT D
2
= H, BIT D
1
= L, BIT D
0
= H). The resulting brightness is
44% (.73 x .60 = .44) of full scale.
The temperature of the display will also aect the LED
bright ness as shown in Figure 5.
Appendix F. Reference Material
Application Note 1027: Soldering LED Components
Applica tion Note 1015: Contrast Enhancement Techniques
for LED Displays
Figure 5.
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Data subject to change. Copyright © 2005-2014 Avago Technologies. All rights reserved. Obsoletes 5989-3181EN
AV02-0699EN - October 9, 2014
YELLOW
HER/ORANGE
0.2
-55
T
A
– AMBIENT TEMPERATURE – °C
3.0
2.6
2.2
1.8
1.4
1.0
0.6
856545255-15-35
GREEN
DEEP RED