摘要:
An inkjet printing system and method capable of automatically calibrating non-uniform speed of a printhead carriage, which includes a test pattern generator, a printing device, an image extractor, a processor and a printhead carriage control signal generator. The test pattern generator generates at least one test pattern. The printing device prints the test pattern on a recording medium. The image extractor captures an image of the test pattern. The processor reads and analyzes the image of the test pattern to accordingly generate a look-up table. The printhead carriage control signal generator generates an inkjet control signal for the printhead carriage, and adjusts a clock of the inkjet control signal in accordance with the look-up table.
摘要:
A method and an apparatus of flexibly controlling printing speed and quality are disclosed. The method controls the inkjet printhead module under the draft print mode. According to the moving distance of the inkjet printhead module, the apparatus generates the address sequence reset signal. According to the address sequence reset signal, the apparatus outputs a plurality of address signals to the printhead. When the address sequence reset signal is enabled, the apparatus re-outputs the address signal to the printhead and transmits the primitive data to the printhead according to the sequence of the address signals.
摘要:
An inkjet printing system and method capable of automatically calibrating non-uniform speed of a printhead carriage, which includes a test pattern generator, a printing device, an image extractor, a processor and a printhead carriage control signal generator. The test pattern generator generates at least one test pattern. The printing device prints the test pattern on a recording medium. The image extractor captures an image of the test pattern. The processor reads and analyzes the image of the test pattern to accordingly generate a look-up table. The printhead carriage control signal generator generates an inkjet control signal for the printhead carriage, and adjusts a clock of the inkjet control signal in accordance with the look-up table.
摘要:
A circuit and a method of estimating pulse frequencies of nozzles in an ink-jet head use a new mechanism of estimating pulse frequencies of nozzles instead of in a conventional counting mechanism. The circuit includes a DRAM, an adder and a method control mechanism. The method control mechanism controls the access method. The DRAM retrieves a plurality of pulse frequency parameters of nozzles after ink-jet cycle signals are received. The adder adds the parameters and weighted values to update pulse frequency parameters. The updated parameters are saved back to the DRAM.
摘要:
A block decoding method and system capable of decoding and outputting data in a rotated direction, which has a Huffman decoding device, a zigzag device, an inverse quantizer, an inverse discrete cosine device, a data buffer and a controller. In this invention, a dynamically set decoding window is introduced to perform the complete JPEG decoding on blocks in the decoding window and the Huffman decoding on blocks out of the decoding window. When decoding and outputting one or more columns of blocks in the decoding window is complete, the decoding window is dynamically adjusted to a next location for decoding and obtaining a next column of block or a next plurality of columns of blocks.
摘要:
An image processing mechanism combines the halftone method and image enhancement technique for processing halftone and improving image performance. The mechanism includes an image input module, an image enhancement module and a halftone module. The image input module sends the original image data to the image enhancement module to enhance the image by filtering. The halftone module processes the enhanced image data by the algorithm of error diffusion. It combines two different processes into one mechanism to simplify the hardware architecture and to decrease the usage of memory.
摘要:
A method and apparatus for detecting faulty nozzles is applied to a multi-function peripheral (MFP). The method is to print a predefined test pattern by an inkjet component of a printing unit. A scanning unit connecting with the printing unit scans the predefined test pattern to generate an image data of the predefined test pattern. Afterwards, an analyzing unit analyzes the image data of the predefined test pattern to see if any one of the nozzles is clogged. Finally, the analyzing unit reports the result to the printing unit. The printing unit will avoid using the clogged nozzles during the printing process to improve the quality of printing.
摘要:
A method of arranging orifices on a print head and the corresponding structure. The invention uses a design that changes relative positions of orifices on a print head so that different ink droplets for the same pixel fall in different areas of the pixel. The printing quality is enhanced because of a more homogeneous distribution of the ink droplets.
摘要:
A scanner unit of a multifunction printer (MFP) increases the speed of the movement of the scanner head, lowers the scanning resolution and uses only a single scanning channel during the scanning of a blank area, and decreases the speed of the movement of the scanner head, increases the scanning resolution and uses the three scanning channels of RGB during the scanning of a graphic area.
摘要:
A method creates printing data applied to a printer that is capable of generating different sizes of ink drops. Firstly, a halftoning threshold table is created based on all possible combinations that are determined based on the quantity of the printheads and the sizes of ink drops quantity provided by each printhead. When the image data to be printed is received, each pixel of an image will correspond to one combination based on the halftoning threshold table. The corresponding combination is deemed as a halftoning encoded data and represented by several bits. These bits can be separated into plural groups, where the bits contained in each group are for driving a specific printhead. That is to say, each printhead has its own driving data so that the printing process will have superior efficiency.