Craic Technologies has introduced the 308 FPD spectrophotometer, designed to enable the high spatial resolution testing of the colour and relative intensity of organic light-emitting diode displays.
The spectrophotometer can be attached to inspection microscopes and probe stations, and can measure and compare the spectral output, intensity and colour consistency of each of the microscopic pixels commonly found in organic light-emitting diode (OLED) devices.
OLEDs have an emissive electroluminescent layer that consists of organic molecules in a supporting matrix.
For displays, this layer is formed into millions of microscopic pixels in ordered rows and columns.
As different organic compounds are used to generate different colours, pixels with different organic compounds can generate different colours for full-colour, high-resolution displays.
An advantage of the OLED devices, unlike traditional liquid crystal displays (LCD), is that the pixels combine both the light source and the colour source.
This means that OLED displays are lighter and thinner and use less electricity than an LCD.
However, consistency of the intensity and colour of the optical emission across the device is critical.
The 308 FPD spectrophotometer is designed to be added to the open photoport of a microscope or probe station.
It allows the user to acquire images and acquire spectra of microscopic sample areas quickly and rapidly.
When added to the appropriate microscope or probe station, the 308 FPD can be used to measure the colour and intensity of each pixel of a OLED display.
Pixels can then be compared with one another for consistency or maps of both the intensity and colour can be generated for each device.
As instruments such as the 308 FPD can acquire spectra on the order of a few milliseconds, entire OLED displays can be mapped quickly and accurately.
This will ensure the consistency of both colour and intensity across the entire device as well as from device to device.
