SSD1339U3 ETC1 [List of Unclassifed Manufacturers], SSD1339U3 Datasheet - Page 41

Manufacturer Part Number

SSD1339U3

Description

132RGB x 132 with 2 smart Icon lines Dot Matrix OLED/PLED Segment/Common Driver with Controller

Manufacturer

ETC1 [List of Unclassifed Manufacturers]

Datasheet

1.SSD1339U3.pdf (59 pages)

Master Contrast Current Control (C7h)

This command is to control the segment output current by a scale factor. This factor is common to color

A, B and C. The chip has 16 master control steps. The factor is ranged from 1 [0000] to 16 [1111]. POR

is 16 [1111]. The smaller the master current value, the dimmer the OLED panel display is set. For

example, if original segment output current of a color is 160uA at scale factor = 16, setting scale factor to

8 to reduce the current to 80uA. Please see Figure 26.

Set Multiplex Ratio (CAh)

This command switches default 1:132 multiplex mode to any multiplex mode from 16 to 132. For

example, when multiplex ratio is set to 16, only 16 common pins are enabled. The starting and the

ending of the enabled common pins are depended on the setting of “Display Offset” register programmed

by command A2h.

SSD1339

Figure 26 – Segment output current for different contrast control and master current setting

200

150

100

Rev 1.1

P 41/59 Jul 2005

Change contrast control

moves along the contrast

curve with constant slope

Segment output current

Contrast setting

Master current setting

Change master current

selects different contrast

slope.

Solomon Systech