The Journal focuses on Optical signal and image processing device, Real-time readout, Multi-layered structures amorphous silicon color detectors. Optical signal is an electromagnetic signal. It has electric and magnetic fields that are orthogonal to each other. It is measured in terms of wavelength. Image processing a form of processing for which the input is an image or a series of images or videos, such as photographs or frames of video. The output of image processing can be either an image or a set of characteristics or parameters related to the image. Multilayer structures are formed by etching patterns in copper foil laminated to both sides of resin-based organic panels that are laminated together with one or more layers of the basic resin in between to act as an insulator. Amorphous silicon is the non-crystalline form of silicon used for solar cells and thin-film transistors in LCDs.

A two terminal optically addressed image processing device based on two stacked sensing/switching p–i–n a-SiC:H diodes are presented. The charge packets are injected optically into the p–i–n sensing photodiode and confined at the illuminated regions changing locally the electrical field profile across the p–i–n switching diode. A red scanner is used for charge readout. The various design parameters and addressing architecture trade-offs are discussed. The influence on the transfer functions of an a-SiC:H sensing absorber optimized for red transmittance and blue collection or of a floating anode in between is analyzed. Results show that the thin a-SiC: H sensing absorber confines the readout to the switching diode and filters the light allowing full color detection at two appropriated voltages. When the floating anode is used the spectral response broadens, allowing B&W image recognition with improved light-to-dark sensitivity. A physical model supports the image and color recognition process.

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Journal of Industrial Electronics and Applications
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