OLED Displays

OLED technology is familiar from consumer devices such as smartphones and TVs. While these are customer-specific active matrix (AM) displays that are used in large quantities, passive matrix (PM) displays are also available in small quantities as a standard product. They are ideal for devices that require an easy-to-read display with a low to medium level of complexity and good readability. They are available in monochrome versions in various colors, e.g. white, yellow, green, light blue and orange, but also in RGB color. Thanks to simple technology, customer-specific layouts can also be developed for moderate quantities, ranging from segmented displays with application-specific icons to full graphic displays. Control is simple as the controller is already integrated.

OLED displays can be used for a wide range of products from all sectors, such as household appliances, kitchen appliances, tools, handheld measuring devices and medical technology. They are ideal for IoT devices, such as displaying battery level, IP address, link status and more.

Displays are usually permanently installed in devices, where they provide an interactive interface to the user in conjunction with a touchscreen. What matters here is a suitable diagonal that is as large as possible and a clear, full-color interface.

Low-complexity displays can be found in simpler devices, where the display of a measured value with a 7-segment display is sufficient. Examples of this are medical instruments such as devices for determining blood pressure or blood oxygen saturation.

For some applications where you would like to have both hands free, displays that are mounted close to the eye are suitable. Large glasses for stereo visualization of augmented or virtual reality come to mind first, but there are also micro-displays that show specific information in the beam path of the eye. Examples of this are optical measuring devices that display auxiliary lines, dimensions and measured values, or target markers with distances and inclination angles.

OLED technology is particularly suitable for this as the aperture, the ratio of active to inactive area, can be sufficiently large. Passive matrix technology offers an advantage over AM OLED because it dispenses with active semiconductor components within the field of view that restrict transparency. Optical refinement can drastically reduce reflection at the interfaces between air and glass. There are virtually no limits to the design, whether rectangular or round. Parts of the display can be finished in a different color, e.g. red and green.

Technical data: Transparency >95%, brightness 3,000cd, pixel dimensions 55µm
Applications: Rangefinder for sports and geodesy, spotting scope for animal observation, telescope, riflescope for shooting sports