Laser printer capable of and method for printing rasterized data of high image quality

A method for printing rasterized image data of high quality in a printer using a printer engine, comprising:

• receiving image data from a host computer and storing the image data in a first memory;
• comparing a dot density of the image data received from the host computer with a dot density of said printer engine;
• transmitting the image data corresponding to one line to said printer engine in accordance with a horizontal synchronization signal, when the dot density of the image data corresponding to said one line is the same as the dot density of said printer engine;
• and
• successively transmitting the image data corresponding to said one line “n” number of times to said printer engine in accordance with corresponding successive horizontal synchronization signals of “n” in number, when the dot density of the image data corresponding to said one line is 1/n of the dot density of said printer engine, “n” being a positive integer.

A printer, comprising:

• means for receiving rasterized image data from a host computer;
• a printer engine;
• a first memory for storing the image data received from the host computer;
• a second memory for temporary storing the image data read from said first memory;
• means for comparing a dot density of the image data with a dot density of said printer engine;
• and
• a printer controller controlling transmission of the image data corresponding to one line to said printer engine for printing on a recording medium in response to receipt of a first clock when the dot density of the image data corresponding to said one line and the dot density of said printer engine are the same;
• and, when the dot density of the image data corresponding to said one line and the dot density of the printer engine are different, said printer controller controlling transmission of the image data corresponding to said one line from said first memory to said printer engine for printing on said recording medium and controlling temporarily storing the image data corresponding to said one line read from said first memory in said second memory in response to receipt of said first clock and controlling successively transmitting at least once the image data corresponding to said one line read from said second memory to said printer engine in response to receipt of at least a second clock following said first clock of a predetermined number of successive clocks.