Image segmentation method based on particle measurements for charged particle transition analysis in e-paper

In the e-paper including two differently-charged particle, the direction of the electric field generated from a voltage source make particles move up or down between two parallel electrodes resulting in the black or white cell. The average particle diameter was about 10μm and the gap between the parallel ITO glasses was 50μm. To investigate the particle transition characteristics for each applied voltage, we proposed the image segmentation method to analyze the image taken from the microscope over the e-paper based on the particle measurements, such as particle location, area and shape. Two sample images captured from the microscope at two applied voltages (-250 and +90V DC), were analyzed and their results were also shown in this letter. Experimental results showed that the proposed method can be a good candidate to evaluate the e-paper panel.