Abstract: Provided are a pixel circuit and a display device having the pixel circuit. The pixel circuit includes an organic light emitting diode, a switching transistor, a storage capacitor, and a driving transistor. The switching transistor is turned off when a scan signal has a first voltage and turned on when the scan signal has a second voltage. The storage capacitor stores a data voltage when the switching transistor is turned on in response to the scan signal. The driving transistor is electrically connected with the organic light emitting diode between a high power supply voltage and a low power supply voltage to provide a driving current to the organic light emitting diode, and includes a first bottom gate electrode that is provided with the first voltage. The driving current corresponds to the data voltage stored in the storage capacitor.

Abstract: The present invention relates to a carbon dioxide monitoring apparatus for vehicles, and to a carbon dioxide management system and carbon dioxide management method using same. It is an aim of the present invention to provide a carbon dioxide monitoring apparatus for vehicles, as well as a carbon dioxide management system and a carbon dioxide management method using same, which enable drivers and passengers to visually check the amount of carbon dioxide emitted by vehicles to alert the drivers and passengers to the emission of carbon dioxide, and which compensate vehicle owners for reducing the emission of carbon dioxide by maintaining a constant travel speed or the like, thereby correcting driving habits and reducing the emission of carbon dioxide, thus achieving environmentally-friendly fuel-saving effects.