Abstract:
A microfluidic printing apparatus responsive to an image file for printing a plurality of pixels on a receiver. The apparatus includes a plurality of colorant delivery chambers which contain colorants having mobile ions; and channels for delivering colorants to each colorant delivery chamber. A structure for colorant delivery is connected to the channels for controlling the amount of colorants delivered to the colorant delivery chambers. Electric drivers associated with the microfluidic pumps and the microvalves and which operate the microvalves and the microfluidic pumps for delivering the colorant to the colorant delivery chambers.
Abstract:
Apparatus for embedding information in a digital image digitized from a developed photographic film in response to a film property and information to be embedded into the digital image includes a scanner for scanning the image on the developed photographic film to produce the digital image. The apparatus stores the film property and has input circuitry for storing information associated with the image and to be embedded in the digital image. The apparatus responds to the stored the film property and the associated information for modifying a predetermined number of pixel values with the associated information in the digital image so that the associated information is embedded in the digital image, wherein the embedded information can subsequently be extracted.
Abstract:
A method for microfluidic printing continuous tone color pixels on a reflective receiver by using cyan, magenta, and yellow inks including supplying a fourth, colorless ink along with the cyan, magenta, and yellow inks needed for color printing; pumping the inks through capillary microchannels by microfluidic pumps; mixing the correct amount of colorless ink with the cyan, magenta, or yellow inks to produce both the correct hue and tone scale for each colored pixel; and transferring the colored pixels of mixed ink to the reflective receiver to form colored pixels on the receiver.
Abstract:
Ink jet printing apparatus and method using timing control of electronic waveforms for variable gray scale printing while eliminating image artifacts and while also reducing printing time and improving accuracy of ink droplet placement on a receiver medium. More specifically the prints an output image on a receiver medium in response to an input image file defined by a plurality of pixels, each pixel obtaining a pixel value. The apparatus includes a print head and a plurality of nozzles integrally attached to the print head. Each of the nozzles is capable of ejecting a plurality of ink droplets therefrom. A waveform generator generates a plurality of electronic waveforms, each of the waveforms being defined by a plurality of electric pulses supplied to the nozzles for ejecting the ink droplets. A printer performance look-up table is also provided for storing a plurality of waveform serial numbers therein. Each of the waveform serial numbers is associated with each one of the electronic waveforms and each of the waveforms is defined by waveform parameters. A controller connected to the look-up table and the waveform generator generates the waveform parameters. This configuration allows the waveforms to accurately place the ink droplets on the receiver medium. A calibrator adapted to receive the input image file for converting the pixel values thereof to a plurality of waveform index numbers is associated with respective ones of the waveform serial numbers and outputs a calibrated image file. The apparatus further comprises an image halftoning unit connected to the calibrator for halftoning the calibrated image file. In addition, the apparatus includes a nozzle selector interconnecting the waveform generator and the print head for selecting predetermined ones of the nozzles for actuation.
Abstract:
An ink jet printing apparatus responsive to an input digital image for producing a halftone image on a receiver, such as a lithographic plate, having halftone dots with each halftone dot being formed by one or more microdots in a screen dot of selectable areas, including an adjustable printhead for delivering different volumes of ink droplets which, when they contact the receiver, forming microdots of different areas according to the selected screen dot size. The apparatus delivers ink to the printhead and is responsive to a selected screen dot size and the digital image to control the printhead to form ink droplets of different volumes to produce a halftone image on the receiver.
Abstract:
An image producing apparatus which can produce a plurality of ink pixels on a display such as a receiver medium is disclosed. The apparatus includes a plurality of ink delivery chambers; a plurality of microfluidic pumps, each associated with a particular ink delivery chamber; and a computer for producing pump parameters to compensate for variabilities in each ink delivery chamber. The apparatus further is responsive to the pump parameters for delivering the correct amount of ink into each ink delivery chamber which is compensated for variabilities in each delivery chamber.
Abstract:
A microfluidic printing apparatus responsive to an image file for printing a plurality of pixels on a display is disclosed. The apparatus includes a plurality of ink delivery chambers; ink channels for delivering ink to each ink delivery chamber; and heater elements associated with particular delivery chambers and effective for causing the transfer of heat to inks in such chambers for regulating ink flow from the ink delivery chambers to the display. The apparatus further includes a circuit for controlling the heater elements for regulating the ink flow in response to the code values of the image file.
Abstract:
Ink jet printing apparatus and method for improved accuracy of ink droplet placement on a receiver medium by compensating for jet direction variabilities between ink nozzles. More specifically, the invention is an ink jet printing apparatus and method for printing an output image on a receiver medium in response to an input image file having a plurality of pixels. The apparatus includes a print head and a nozzle integrally attached to the print head. The nozzle has a droplet placement characteristic (e.g., undesired placement of the droplet on the receiver medium) associated therewith. A waveform generator associated with the nozzle generates an electronic waveform including a plurality of electronic pulses to be supplied to the nozzle for adjusting the droplet placement characteristic. In this manner, the invention compensates for the undesired droplet placement characteristic, so that the droplet is accurately placed on the receiver medium irrespective of physical variabilities between nozzles.
Abstract:
A method for microfluidic printing continuous tone color pixels on a reflective receiver by using cyan, magenta, and yellow inks, including supplying a fourth, colorless ink along with the cyan, magenta, and yellow inks needed for color printing and pumping the inks through capillary microchannels by microfluidic pumps. The method further includes mixing the correct amount of colorless ink with the cyan, magenta, or yellow inks to produce mixtures of ink having a desired correct hue and tone scale; and transferring the pixels of the ink mixtures to the reflective receiver to form colored pixels on the receiver comprising a support, a layer formed over the support of an ink impermeable material and cavities defined in a surface of the ink impermeable layer and an ink absorbing material disposed in the cavities for absorbing a determinable amount of ink until saturated such that ink is not conveyed to adjacent cavities.
Abstract:
A method for transferring colorant from a donor element to a dye receiving layer to form a desired label includes providing an embossed surface on the dye receiving layer having desired spacing to minimize mottling; positioning the embossed surface of the dye receiving layer in the focal plane of a focused laser beam with a colorant donor element being positioned in transferable relationship with the dye receiving element; and focusing a laser beam on the colorant donor element to heat the donor element to a sufficient temperature to transfer colorant to the dye receiving element to thereby effect the transfer of colorant from the donor element to the dye receiving layer. The method also includes providing relative movement between the dye receiving layer and the laser beam and modulating the laser beam in correspondence with a data record, thereby effecting laser thermal colorant transfer to the embossed surface on the dye receiving layer from the donor element in correspondence with a desired label so that the embossed spacing provides a high quality mottle free label.