Patent ID: 7237863
Filing Date: 2007-07-03
Classification: B41J

Abstract:
1. A recording device having a recording head operable to perform recording using thermal energy, the recording device comprising: a sensor having a p-n junction of a semiconductor and being disposed inside the recording head, wherein the p-n junction includes a P-side portion and a N-side portion; an analog/digital converter converting a first voltage value at the P-side portion into a first digital data and converting a second voltage value at the N-side portion into a second digital data; a difference calculator calculating a difference data of the first and second digital data, a power supply; a first resistance element connected between the P-side portion and the power supply; a ground; a second resistance element connected between the N-side portion and the ground; the analog/digital converter including at least two channels including first and second channels; a first node between the P-side portion and the first resistance element; means for connecting the first node to the first channel; a second node between the N-side portion and the second resistance element; and means for connecting the second node to the second channel, wherein each of the first and second resistance elements has a resistance value such that each of the first and second voltage values is substantially about a center of a dynamic range of the analog/digital converter.