OSRAM ORBEOS Components - Manual (Page 5)

5
OLED INTEGRATION
OLED devices without Flex-PCB (for Flex-PCB, please see
below) are electrically connected via the metallized areas
at the contact ledges (see fi g. 1). Usually, symbols at the
metallization indicate the polarity of the contacts. For round
ORBEOS ® (CDW-031, CMW-031) devices, the cathode
contacts can be identifi ed when looking at the emissive side
of the device: Cathode contacts exhibit a comb structure at
the edge of the active area (see fi g. 2). Often, devices have
more than two contact ledges, i.e. there might be more than
one contact ledge for each polarity (see device in fi g. 2).
The rectangular ORBEOS ® RMW-046 exhibits three contact
ledges, two cathode pads and one anode pad (see fi g. 2c).
All contact ledges must be electrically connected in order to
ensure optimum current supply from all sides necessary for
best brightness homogeneity over the active area. Other
confi gurations will usually lead to a signifi cant reduction of
brightness homogeneity.
1.2. Contact ledges and their polarity
Fig. 2. a) Polarity of a round ORBEOS ® CDW-031, CMW-031. b) The cathode contacts exhibit a comb structure. c) The rectangular ORBEOS ® RMW-046 has three contact ledges.
a b c
–
–
–
–
+
+
+ +
Fig. 1. Rear side of an OLED device. The device is electrically connected at the contact
ledges. Symbols usually indicate the polarity of the contacts.