Round OLED displays, fast and temperature-stable
Circular, high contrast, ultra-thin, power-saving and stable over a very wide temperature range: The OLED displays of the EA W128128-XR series provide the ideal solution for compact handheld devices.
The new OLED displays from ELECTRONIC ASSEMBLY are just 2.05 mm thick. Its display area has a diameter of 30 mm (1.2") and consists of a passive matrix of 128 x 128 pixels. This format qualifies perfectly for the display of analogue measurement scales. The external dimensions of the entire module, including the connection cable, amount to almost 37x41mm.
As a self-luminous display technology, OLEDs offer numerous advantages compared to LCDs. In addition to the extremely flat design, the advantages include very wide viewing angles all around up to almost 180°. Thanks to the deep black level, this display technology impresses with a contrast ratio of >2000:1. The brightness of the controlled areas in the 50% checkerboard pattern is 80cd/m2. At first glance, this may not sound much, but it is brilliant even in bright daylight. With 10 µs, the display reacts extremely fast, even at ice-cold -40°C as well as scorching +80°C.
The integrated controller SSD1327ZB requires a supply voltage of 3.3V, the display 14.5V. The current consumption for displaying a checkerboard pattern typically amounts to 24 mA which is a very economical consumption. The display is controlled via SPI protocol via a 24-pole ZIFF connection. Thanks to numerous initialization examples, measured values, graphics and icons can be displayed quickly and with high contrast.
The EA W128128-XR displays are offered in three colours: EA W128128-XRLG with yellow, EA W128128-XRLW with white and EA W128128-XRLB with blue pixels on a black background. The typical lifetime of the yellow display amounts to 50,000 hours. As a rule, it takes 20,000 hours for white and blue to lose half their brightness.
Owing to its compact design, the energy-saving display and the extreme temperature stability, the EA W128128-XR series is excellently suited for use in mobile handheld devices. A USB test board and OLED simulation software for Windows are also available for quick testing of individual applications.