Appendix F. Reference

Material

Application Note 1027:

Soldering LED Components

Application Note 1015: Contrast

Enhancement Techniques for

LED Displays

Figure 10. Relative luminous Intensity versus ambient temperature.

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 multiply

the two relative brightness

factors. For example, if Control

Register 0 holds the word

1001101, the peak current is

= H). The resulting brightness is

44% (.73 x .60 = .44) of full

scale.

The temperature of the display

will also affect the LED

brightness as shown in Figure 10.

0

-50

AMBIENT TEMPERATURE – °C

3.0

2.5

2.0

1.5

1.0

0.5

100

50

0

RED

GREEN