Patent ID: 7907495
Filing Date: 2011-03-15
Classification: G11B,G11C

Abstract:
1. A two-dimensional digital data acquisition element which applies light to an optical information recording medium having a plurality of unit data areas each formed of one encoded data and having two-dimensional digital image information recorded thereon, and acquires two-dimensional digital data reproducing the two-dimensional digital image information based on reproduced light supplied from the optical information recording medium, the two-dimensional digital data acquisition element comprising: a pixel area having a plurality of pixels arranged in a matrix form, each of the pixels having a photoelectric conversion element to convert the reproduced light from the optical information recording medium to an electric signal; selection circuits which select the pixel; a readout circuit which reads out an electric signal of a pixel selected by the selection circuits; and a 1-bit AD converter which converts an output of the readout circuit to 1-bit digital data, wherein a pitch ratio N between a pitch P where A is the number of digital data in one-dimensional direction of one byte of the two-dimensional digital data and n is a natural number of at least 2.