Provided are a light emitting device and a light emitting device package including the same. The system includes a heated windshield with an electrical heating element, an air circulation system with a blower to provide a stream of air over a surface of the windshield and a controller configured to select a duty cycle for the heating element based upon air circulation system operating parameters and environmental conditions such as ambient temperature. Slope may be determined between every adjacent pair of data points or between selected data points. The processor may also be able to facilitate the storage of the first vault key at a first data center and facilitate the storage of the second vault key at a second data center. The chip removal device is fitted with a gas flow generator, having a gas nozzle which points towards the tool and with a liquid flow generator having a liquid channel configured below the tools cutting edge. A pattern data adder adds, to transmission data, pattern data determined from the transmission data so that the transmission data per one bit becomes data having a form close to a repetition of 1, 0, and optical parallel transmission by AC coupling is realized thereby.