| 摘要 |
A method and apparatus (130) is disclosed for incremental printing of images or text on printing media such as paper, transparency stock, or other glossy media, whereby images or text are constructed from individual ink drops deposited on printing media in a two-dimensional pixel array, employing printmode techniques to optimize image quality, throughput speed and reliability, including generating pseudo-random printmasks to minimize banding, bleeding, blocking, and other undesirable printing artifacts, and combining random selection (121) of a pass number for printing each pixel of a printmask with application of various constraints. In combination with other aspects of the invention, speed is optimized by depositing substantially a single drop of ink per pixel, thereby minimizing both the number of passes required to render all pixels completely and drying time. Image quality is optimized by maximizing the time and distance between deposition of individual ink drops, thereby minimizing coalescence, bleeding, cockling, blocking, pen temperature, and pen-firing frequency which affect uniformity and consistency of ink drop size. Reliability and durability are optimized by maintaining pen-firing frequency and carriage velocity below maximum limits set by manufacturers thereof.
|
