An inkjet printing device includes a stage; an inkjet head disposed above the stage and comprising nozzles through which ink is discharged, the ink including bipolar elements extending in a direction; an ink circulation part which supplies the ink to the inkjet head, and to which the ink remaining after being discharged from the inkjet head is supplied; and at least one sensing part disposed between the inkjet head and the ink circulation part and sensing a number of the bipolar elements that are discharged through the nozzles.

A drag force sensor on a fountain solution carrier roller surface measures drag force of a fountain solution layer on the fountain solution carrier roller surface in real-time during a printing operation. The measured drag force is used in a feedback loop to actively control the fountain solution layer thickness by adjusting the volumetric feed rate of fountain solution added onto the imaging member surface during a printing operation to reach a desired uniform thickness for the printing. This fountain solution monitoring system may be fully automated.

An apparatus and a method for rapid monitoring of inkjet ink droplets using time delay integration are proposed. Inkjet ink droplets used in manufacturing a display panel may be captured for a set period of time using a wide one-dimensional (1D) line scan camera to obtain a plurality of pieces of high-resolution small-amount image data. The obtained plurality of pieces of high-resolution small-amount image data may be subjected to image processing to generate ink droplet two-dimensional (2D) time-space information. The ink droplet two-dimensional (2D) time-space information may be compared with pre-stored reference ink droplet 2D time-space information to determine whether the ink droplets are normal.

An apparatus and a method for rapid monitoring of inkjet ink droplets using time delay integration are proposed. Inkjet ink droplets used in manufacturing a display panel may be captured for a set period of time using a wide one-dimensional (1D) line scan camera to obtain a plurality of pieces of high-resolution small-amount image data. The obtained plurality of pieces of high-resolution small-amount image data may be subjected to image processing to generate ink droplet two-dimensional (2D) time-space information. The ink droplet two-dimensional (2D) time-space information may be compared with pre-stored reference ink droplet 2D time-space information to determine whether the ink droplets are normal.

A method and apparatus for detecting a pulsed THz beam includes emitting, by THz emitter, pulsed THz radiation of outgoing pulse shape for interacting with target body; detecting, by THz detector, incoming THz radiation comprising THz pulses, and outputting, by THz detector, a raw detector data of pulse shapes of incoming THz pulses; and determining, by pulse shape reconstruction module, a reconstructed incoming pulse shape based on the raw detector data, measuring, by sensor, a time-of-flight quantity (d) affecting the time of flight of the THz radiation; and adjusting operation of at least one of THz emitter, THz detector and pulse shape reconstruction module using the time-of-flight quantity (d), for correcting for variations in time of flight of the THz radiation.

A method and apparatus for detecting a pulsed THz beam includes emitting, by THz emitter, pulsed THz radiation of outgoing pulse shape for interacting with target body; detecting, by THz detector, incoming THz radiation comprising THz pulses, and outputting, by THz detector, a raw detector data of pulse shapes of incoming THz pulses; and determining, by pulse shape reconstruction module, a reconstructed incoming pulse shape based on the raw detector data, measuring, by sensor, a time-of-flight quantity (d) affecting the time of flight of the THz radiation; and adjusting operation of at least one of THz emitter, THz detector and pulse shape reconstruction module using the time-of-flight quantity (d), for correcting for variations in time of flight of the THz radiation.

A tint measuring device configured for being connected in series in a fluid flow circuit, the tint measuring device including at least one light source configured for emitting polychromatic light towards the fluid in a measurement zone; a light sensor configured for receiving a light signal either reflected from or transmitted through the fluid, the reflected or the transmitted light signal corresponding to the optical reflection or the optical transmission, respectively, by the fluid, of the polychromatic light emitted towards the fluid by the at least one light source; and a computing unit configured for performing a spectral analysis of the light signal received by the light sensor and for determining a chromatic signature of the fluid.

Methods and systems for adjusting formulation of pigments for dye sublimation are disclosed. In one embodiment, the method includes receiving, by a processor, a selection of the substrate and the image to be dye sublimated into the substrate. The method also includes determining, by the processor, an amount of each pigment of sublimation ink to be used to print the image on a sheet based on a characteristic of the substrate. The method further includes printing, by a dye sublimation apparatus, the image on the sheet using the amount of each pigment of sublimation ink and infusing, by the dye sublimation apparatus, the image from the sheet into the substrate.

Methods and systems for adjusting formulation of pigments for dye sublimation are disclosed. In one embodiment, the method includes receiving, by a processor, a selection of the substrate and the image to be dye sublimated into the substrate. The method also includes determining, by the processor, an amount of each pigment of sublimation ink to be used to print the image on a sheet based on a characteristic of the substrate. The method further includes printing, by a dye sublimation apparatus, the image on the sheet using the amount of each pigment of sublimation ink and infusing, by the dye sublimation apparatus, the image from the sheet into the substrate.

A SAP evaluation apparatus includes: a main body installed with a lifting bar that is raised or lowered; a container portion installed under the lifting bar in the main body and having an internal containing space for containing an absorber; an operating portion connected to the lifting bar and having a lifting plate that is raised or lowered within the containing space and applies pressure to the absorber and an injection portion for injecting an ink in the direction of the absorber; a dispersion measurement portion for measuring the dispersion of the ink through the absorber; and a controller installed at the main body to measure absorption of the ink into the absorber and measure swelling capacity of the absorber while the ink is injected into the absorber.