OLED Displays: What is OLED

OLED displays are a new-generation technology utilizing organic compounds and having self-emissive characteristics. OLED displays produce higher contrast images, have a wider viewing angle, faster response and are thinner and more lightweight compared to conventional displays.

Working Principle of OLED
OLED has a simple structure, which has an organic light emitting layer between anodes and cathodes. When a direct current is applied to the device, holes with positive charges are injected from anodes and electrons with negative charges are injected from cathodes into the organic light emitting layer. Then, the organic molecules emit light when the positive hole and the negative electron couple and generate energy in the organic light emitting layer. Because most of the organic materials are insulators and do not easily conduct current, organic light emitting layers need to have very thin structures, approximately 0.1um.

Device Structure of OLED
The typical device structure of OLED is a laminated anode (transparent electrode), a hole injection layer, a hole transport layer, an emitting layer, an electron transport layer, an electron injection layer and a cathode (metal electrode) on the glass substrate. Each layer is stacked on the glass substrate using vacuum deposition technology. Because organic materials are affected by oxygen and moisture, OLED panels are encapsulated by sealing materials such as metal or glass after being produced into layers on the glass substrate.

Features
High contrast white color
High density
Wide viewing angle
Reliable COG construction
Low profile
Long life, high quality
-30C to +75C Operating Temp.

ME25664A OLED Glass

Compact design
Low profile
12 way flexi-connection

Crisp image
High contrast white color
High density
Wide viewing angle

Dependable
Reliable COG OLED panel
Long life, high quality

Specification:

Specification

Parameter	Condition
Color of illumination	White 85 cd/m² (Typ.)
Dot matrix	256 x 64
Display area	71.4 x 19.0 mm, Dot pitch 0.28 x 0.3 mm (X x Y)
Outline size	79.4 x 30.8 x 2.025 mm
Power supply	15.5V @ 28 mA (100%) 3.3V @ 2 mA
Operating / Storage Temperature	-30C to +75C / -40C to +85C
Interface	Clock Serial – SIN, SCK, RS, CS, RESET

GE256X64B-7032B OLED Module

Crisp image
High contrast white color
High density
Wide viewing angle

Easy to use
High performance MCU on board
Various text and graphic commands
Built-in international fonts

Easy interface
USART / UART / SPI / Parallel

Dependable
Reliable COG OLED panel
Long life, high quality

Specification

Specification

Parameter	Condition
Color of illumination	White 85 cd/m² (Typ.)
Dot matrix	256 x 64
Display area	71.4 x 19.0 mm, Dot pitch 0.28 x 0.3 mm (X x Y)
Outline size	94.0 x 36.0 x 8.2 mm
Command set	Noritake GU-7000B Series compatible. Code library available
Power supply	3.3 V 100 mA (50% on)
Operating / Storage Temperature	-30C to +75C / -40C to +85C

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