JPS6434754A - Printer device - Google Patents

Abstract

PURPOSE:To prevent the breakage of a ribbon and to enhance a printing time and the life of the ribbon, by a method wherein, a printing duty per predetermined dot line is calculated, printing cycle information per dot line is formed according to the calculation result, and a printing is carried out in control of a printing cycle per dot line on the basis of the printing cycle information. CONSTITUTION:A control part 11 consists of a counter 11a calculating a printing duty per predetermined dot line, a printing cycle information forming part 11b forming printing cycle information according to the calculation result, and a printing instruction part 11c imparting a printing instruction to a motor drive part 15 and a heat control part 16 on the basis of the printing cycle information. When printing information is stored for one line in a printing buffer 14a, the control part 11 judges a printing cycle per dot line according to the printing instruction part 11c. For example, if the printing cycle information for extending the printing cycle is set, the printing instruction part 11c imparts a printing instruction for extending the printing cycle to the motor drive part 15 and simultaneously a pattern of image data to the heat control part 16. In this manner, the conduction to head electrodes of a printing head 18 is carried out at longer intervals and the amount of heat accumulation in a conductive heat-sensitive ribbon is reduced; thus, the breakage of the ribbon is prevented.