The QDI 302 microscope spectrophotometer from Craic Technologies is designed to measure and compare the spectral output, intensity and colour consistency of the pixels commonly found in OLED devices.
Organic light-emitting diodes (OLED) 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.
The biggest 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 the colour of the optical emission across the device are critical.
This is where instruments such as the QDI 302 spectrophotometer for microscopes are used.
The QDI 302 is a spectrophotometer that is designed to add to the open photo port 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 QDI 302 can be used to measure the colour and intensity of each pixel of an 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 QDI 302 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.
