Abstract: Disclosed are a composition and a perfume composition for inhibiting growth of breast cancer stem cells containing phenylacetaldehyde or a pharmaceutically acceptable salt thereof as an active (effective) ingredient, and a pharmaceutical composition, a food composition or the like for inhibiting metastasis of breast cancer, or treating or preventing breast cancer, including the composition. The phenylacetaldehyde inhibits growth of breast cancer cells and formation of breast cancer stem cells. In addition, the phenylacetaldehyde inhibits expression of self-renewal genes such as Nanog, Sox2, Oct4, and CD44 known to be specifically expressed in breast cancer stem cells, inhibits production of IL-6 known to be involved in formation of mammospheres of breast cancer stem cells, and inhibits STATS signaling pathways. Accordingly, the compound inhibits growth of breast cancer stem cells and is useful for the treatment of breast cancer.

Abstract: Disclosed are a composition and a perfume composition for inhibiting growth of breast cancer stem cells containing phenylacetaldehyde or a pharmaceutically acceptable salt thereof as an active (effective) ingredient, and a pharmaceutical composition, a food composition or the like for inhibiting metastasis of breast cancer, or treating or preventing breast cancer, including the composition. The phenylacetaldehyde inhibits growth of breast cancer cells and formation of breast cancer stem cells. In addition, the phenylacetaldehyde inhibits expression of self-renewal genes such as Nanog, Sox2, Oct4, and CD44 known to be specifically expressed in breast cancer stem cells, inhibits production of IL-6 known to be involved in formation of mammospheres of breast cancer stem cells, and inhibits STATS signaling pathways. Accordingly, the compound inhibits growth of breast cancer stem cells and is useful for the treatment of breast cancer.

Abstract: A method of compensating for alignment errors includes determining a degree of overlap between nozzles of a plurality of head chips; checking driving information corresponding to the determined degree of overlap between nozzles, from a pre-provided compensation table, and controlling the driving of the nozzles in an overlapping area, according to the checked driving information.

Abstract: An ink level detecting apparatus usable with an ink-jet printer includes an ink tank having a bottom, a ceiling, and a sidewall, a shrinkable ink pack is accommodated in the ink tank and having a top surface that moves down evenly as an ink level in the shrinkable ink pack decreases, a fixed electrode installed to an upper portion of the ink tank, and a movable electrode disposed to face the fixed electrode at a predetermined distance from the fixed electrode. The movable electrode moves in a horizontal direction according to a height variation of the top surface of the shrinkable ink pack such that an overlap area between the movable electrode and the fixed electrode varies. Therefore, the ink level is detected from electric capacity variation sensed between the fixed electrode and the movable electrode.

Abstract: A method of compensating for alignment errors includes determining a degree of overlap between nozzles of a plurality of head chips; checking driving information corresponding to the determined degree of overlap between nozzles, from a pre-provided compensation table, and controlling the driving of the nozzles in an overlapping area, according to the checked driving information.

Abstract: An ink cartridge includes a residual ink sensing unit having a simple structure of an upper electrode plate and a lower electrode plate to accurately detect a capacitance between the upper and lower electrode plate. Therefore, data of a remaining amount of ink is reliably measured, there is less possibility that an ink bag is damaged when the residual ink sensing unit is installed in the ink bag, and damage to the ink cartridge and defective printing due to unstable supply of ink and the missing of the time for replacing the ink cartridge are prevented.

Abstract: An inkjet image forming apparatus and a method of performing a high resolution printing using multiple passes. In the inkjet image forming apparatus and a method of performing a high resolution printing, it is possible to obtain a resolution that is higher than an actual resolution of a print head by performing a printing operation several times on a printing medium in a multi-pass type printing method while moving the print head along a length direction thereof. As a result, printing quality can be improved by minimizing visibility of missing dots that occur due to failed nozzles.

Abstract: An ink level detecting device also functions as a cover opening sensor, and an ink-jet image forming apparatus having the ink level detecting device functions in the same way. The ink level detecting device detects an ink level in an ink container mounted on an ink container mounting unit, and includes a first electrode disposed on an inner surface of a cover which covers the ink container mounting unit and a second electrode disposed on the ink container. The ink level detecting device detects an opening of the cover as well as an ink level variation by sensing a variation in a capacitance between the first and second electrodes.

Abstract: An ink level detecting apparatus of an ink-jet image forming apparatus includes a switching part which is switched on and off by an input signal, an ink detecting part which is turned on and off according to a switching operation of the switching part to detect an ink level of ink in the ink-jet image forming apparatus, and a controller which checks a voltage between the ink and the ink detecting part before a saturation period of the ink detecting part in order to detect the ink level, based on whether the ink detecting part is turned on.

Abstract: An ink level detecting device also functions as a cover opening sensor, and an ink-jet image forming apparatus having the ink level detecting device functions in the same way. The ink level detecting device detects an ink level in an ink container mounted on an ink container mounting unit, and includes a first electrode disposed on an inner surface of a cover which covers the ink container mounting unit and a second electrode disposed on the ink container. The ink level detecting device detects an opening of the cover as well as an ink level variation by sensing a variation in a capacitance between the first and second electrodes.

Abstract: An ink cartridge includes a residual ink sensing unit having a simple structure of an upper electrode plate and a lower electrode plate to accurately detect a capacitance between the upper and lower electrode plate. Therefore, data of a remaining amount of ink is reliably measured, there is less possibility that an ink bag is damaged when the residual ink sensing unit is installed in the ink bag, and damage to the ink cartridge and defective printing due to unstable supply of ink and the missing of the time for replacing the ink cartridge are prevented.

Abstract: An ink level detecting apparatus usable with an ink-jet printer includes an ink tank having a bottom, a ceiling, and a sidewall, a shrinkable ink pack is accommodated in the ink tank and having a top surface that moves down evenly as an ink level in the shrinkable ink pack decreases, a fixed electrode installed to an upper portion of the ink tank, and a movable electrode disposed to face the fixed electrode at a predetermined distance from the fixed electrode. The movable electrode moves in a horizontal direction according to a height variation of the top surface of the shrinkable ink pack such that an overlap area between the movable electrode and the fixed electrode varies. Therefore, the ink level is detected from electric capacity variation sensed between the fixed electrode and the movable electrode.

Abstract: An inkjet image forming apparatus and a method of performing a high resolution printing using multiple passes. In the inkjet image forming apparatus and a method of performing a high resolution printing, it is possible to obtain a resolution that is higher than an actual resolution of a print head by performing a printing operation several times on a printing medium in a multi-pass type printing method while moving the print head along a length direction thereof. As a result, printing quality can be improved by minimizing visibility of missing dots that occur due to failed nozzles.