The Trends in LED Printheads
نویسنده
چکیده
The market for colour printers based on electrophotographic systems is growing steadily. The sector exceeded 690,000 units in 2001 and is forecast to reach some 1.5 million units by 2005. The printer expected to be the main driving force behind this market expansion is the tandem type colour printer. The tandem colour printer has separate processes and recording systems for cyan, magenta, yellow and black, and is able to form a toner image in a single pass of the printing paper. This means that the printer has a simple structure and is suitable for high-speed printing, as well as achieving compact design and lower prices. The recording light source in a tandem colour printer uses either an LED printhead or a laser scanner head. The LED printhead has several advantages being a solid-state light source, it is easy to handle, and its compact design allows for reduction in the printer size. These make it the ideal choice for tandem colour printers, a situation which has led to pressure for further price reductions in LED printheads, whilst maintaining performance factors, such as high print density and high speed. Oki Digital Imaging Corp. started operations in October 1999, with its aim to become the world’s leading supplier of LED printheads through a comprehensive approach combining R&D, design, manufacture and marketing. The company is developing LED printhead technology, in parallel with the development of colour printers, and has already managed to devise the compact and inexpensive high-density, high-speed technologies required in light sources for electrophotographic colour printers. This paper compares the structure of LED printheads with that of laser scanner heads, discussing the issues involved with head design, and introducing the technology that has been developed by Oki Digital Imaging.
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تاریخ انتشار 2003