An electronic imaging device includes a display unit and a barrier layer. At least two spaced apart vacuum panels are positioned between the upper and central channel, and at least two spaced apart vacuum panels are positioned between the central channel and lower channel. A photoresist pattern of a line shape is formed on the entire surface such that the photoresist pattern is exposed to be narrower than the region through which the second hard mask layer is exposed. Two handles are provided for manually positioning the trailer at a desired display angle. The first to fourth pixels include a switching element and an organic light emitting element connected to the switching element, and the sum of the areas of the first to fourth pixels is substantially the same as the area of the dot. The collected scattering signals are analyzed using a computing device such as a computer or a microprocessor.