Abstract: Disclosed herein are a printing apparatus that is mounted with roll-shaped drawable printing paper made of thermal paper whose color changes by heat, performs printing on the printing paper and cuts the printing paper via a cutter, and a printing method that is performed by the printing apparatus.

Abstract: The present disclosure relates to a polyimide-based resin film comprising a polyimide-based resin containing a polyimide repeating unit represented by Chemical Formula 1 and a polyimide repeating unit represented by Chemical Formula 2, a substrate for display device, and an optical device using the same.

Abstract: Disclosed herein is a method of managing a printing apparatus including a thermal print head. The method of managing a printing apparatus includes: starting, by the controller of a printing apparatus, the cleaning of a thermal print head when a predetermined condition is satisfied; selecting, by the controller, a cleaning method based on at least one the satisfied condition and previously stored information; and cleaning, by the controller, the thermal print head by driving at least one of heating elements, included in a plurality of recording elements constituting the thermal print head, according to the selected cleaning method.

Abstract: Disclosed herein are a method and apparatus for performing print jobs in a printing system including a host device and a printing device. The method of performing print jobs in a printing system including a host device and a printing device includes: requesting printing while transmitting print data and identifications (IDs) corresponding to one or more print jobs, included in a job list, to the printing device; if an identification (ID) corresponding to at least one completed print job is received from the printing device, updating the job list by deleting a print job corresponding to the received ID from the job list; if an error has occurred in the printing system, determining whether the error has been resolved; and if it is determined that the error has been resolved, resuming printing.

Abstract: Disclosed herein are a method and apparatus for performing print jobs in a printing system including a host device and a printing device. The method of performing print jobs in a printing system including a host device and a printing device includes: requesting printing while transmitting print data and identifications (IDs) corresponding to one or more print jobs, included in a job list, to the printing device; if an identification (ID) corresponding to at least one completed print job is received from the printing device, updating the job list by deleting a print job corresponding to the received ID from the job list; if an error has occurred in the printing system, determining whether the error has been resolved; and if it is determined that the error has been resolved, resuming printing.

Abstract: There is provided a printing method including: receiving at least one of print data and control commands from a host device; storing print image data on the basis of the received print data when there is no previously stored print image data before the receiving of the print data, and storing print image data on the basis of the received print data after deleting previously stored print image data when there is the previously stored print image data before the receiving of the print data; and printing the stored print image data according to a preset control command among the control commands received from the host device.