Patent ID: 8339926
Filing Date: 2012-12-25
Classification: B82Y,G11B

Abstract:
1. An apparatus for reproducing information written in a recording medium, by using an electric field read head, the apparatus comprising: a modulation unit that modulates an electric field variation transition of an electric field generated from the recording medium by using a modulation signal; a detection unit that detects a variation transition in the modulated electric field; and a demodulation unit that demodulates a voltage signal containing information regarding the variation transition in the modulated electric field and determined according to the detected variation transition by using the modulation signal, and determines information written in the recording medium according to a result of the demodulation, wherein the electric field read head comprises a writing electrode for writing the information to the recording medium, wherein the modulation signal is applied to the writing electrode to reproduce the information from the recording medium, and wherein the detection unit is disposed inside of the electric field read head.