Abstract: An electric precipitator to collect contaminants, such as dust, using electrical attraction. The electric precipitator includes high-voltage electrode plates and low-voltage electrode plates alternately stacked to form an electrification region and a collection region in an air flow direction, wherein each of the high-voltage electrode plates includes a discharge electrode to generate discharge between the discharge electrode and an opposite electrode so that contaminants are electrified in the electrification region and a collection electrode disposed over the electrification region and the collection region to collect the electrified contaminants in the collection region.

Abstract: An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.

Abstract: Provided is a thermal inkjet printhead. The inkjet printhead includes a substrate; an insulating layer formed on the substrate; a heater formed on the insulating layer and an electrode to apply current to the heater; a chamber layer that is stacked on the insulating layer and includes an ink chamber; a nozzle layer that is stacked on the chamber layer and includes a nozzle; and at least a heat transfer layer that is formed inside the insulating layer and dissipates heat generated in by the heater toward the substrate.

Abstract: A mobile terminal and a schedule notifying method of the mobile terminal are disclosed. The mobile terminal includes: a wireless communication unit configured to perform radio communication with a location-based service (LBS) providing server; a controller configured to select a participant in a schedule creation mode, discriminately display whether or not the selected participant uses the LBS, registers schedule to a scheduler when creating of the schedule is completed, and acquire location information of the participant using the LBS when an alarm time of the registered schedule arrives; and an output unit configured to output a schedule notification signal and location information of the participant.

Abstract: An optical disc includes a read-only area having a first wobble, which is a data wobble formed in the read-only area for only reading, a readable/writable area having a second wobble, which is different from the data wobble, and a connection area between the read-only area and the readable/writable area having a third wobble having the same frequency as one of the first and second wobbles.

Abstract: An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.

Abstract: An optical disc includes tracking polarity information. The optical disc includes a clamping area, a lead-in area, a data area, and a burst cutting area (BCA). The BCA is present between the clamping area and the lead-in area and in which information regarding the optical disc is recorded, and the information is read before performing tracking in the data area. Accordingly, it is possible to obtain the tracking polarity information and/or reflectivity information without trial and error and directly record or reproduce user data in a data area of the optical disc.

Abstract: An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

Abstract: The inkjet printhead includes substrate having an ink feed hole formed to supply ink, a chamber layer stacked on the substrate, and including a plurality of main ink chambers formed therein with the ink feed hole therebetween and a plurality of compensation ink chambers formed therein between the main ink chambers that face each other; and a nozzle layer stacked on the chamber layer, and including a plurality of main nozzles corresponding to the main ink chambers and a plurality of compensation nozzles corresponding to the compensation ink chambers.

Abstract: An optical recording medium has a user data area and a lead-out area each having grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of the grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of the wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproducing, from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have the same condition, thereby preventing deterioration in reproducing and/or recording due to a difference in light power transmittance of another recording layer.

Abstract: An optical information storage medium includes a lead-in area, a lead-out area, and a user data area between the lead-in and lead-out areas and in which user data is recorded. Pits are formed in the lead-in area, the user data area, and the lead-out area, and a track pitch in all or a portion of the lead-in area is different from a track pitch in the remaining area of the optical information storage medium.

Abstract: A thermal inkjet printhead includes a plurality of bonding pads to which an external voltage is applied, a plurality of common wires connected to the each of the bonding pads, respectively, a plurality of individual wires connected to each of the common wires, respectively, and heaters connected to each of the individual wires, respectively, to generate ink bubbles by heating ink, wherein each of the common wires includes a first metal layer and a first metal bump which are formed on the first metal layer.

Abstract: An inkjet printhead and a method of manufacturing the inkjet printhead. The inkjet printhead includes a substrate including a trench formed to a predetermined depth in an upper portion of the substrate and an ink feed hole formed through a bottom surface of the trench to supply ink, an etch stop layer formed of a metal and formed on an inner surface of the trench, a plurality of heaters, to create bubbles by heating ink, formed on the substrate, a plurality of electrodes, to apply a current to the plurality of heaters, formed on the substrate, a chamber layer stacked on the substrate and including a plurality of ink chambers formed above respective heaters to receive ink from the ink feed hole via the trench, and a nozzle layer stacked on the chamber layer and including a plurality of nozzles to eject ink from the plurality of ink chambers.

Abstract: An image data obtaining method to obtain three-dimensional (3D) image data by using a plurality of pieces of two-dimensional (2D) image data obtained by capturing an image of a scene, the image data obtaining method including: setting a focal length of an image-capturing device so as to allow a reference component, from among a plurality of components of the scene, to be focused; obtaining the plurality of pieces of 2D image data by using different aperture values in the image-capturing device having the set focal length; and obtaining the 3D image data by using a relation between the plurality of pieces of 2D image data.

Abstract: An ink feedhole of an inkjet printhead and a method of forming the same includes an ink feedhole that penetrates a substrate and has a width that narrows in an upper direction of the substrate, wherein at least one internal wall of the ink feedhole has a plurality of steps and inclines with respect to a surface of the substrate.

Abstract: An optical disc includes a plurality of recording layers, each layer having a lead-in area, a data area, and a lead-out area. A dedicated-reproducing area having a disc-related information zone, and a rewritable area are provided in at least one of the lead-in and lead-out areas of the optical disc. Accordingly, a reliability of a data recording/reproducing with respect to the optical disc is improved.

Abstract: A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower than the erase power level.

Abstract: A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a multi-pulse having a high level which is higher than an erase power level and a low level which is lower than the erase power level. A power level of a leading one of the multi-pulse of the erase pattern and a power level between an end of the erase pattern and a start point of a leading pulse of a recording pattern are controlled to be the low level and the high level, respectively, the high level and the high level, respectively, the high level and the low level, respectively, or the low level and the low level, respectively.

Abstract: An optical recording medium has a user data area and a lead-out area, wherein the user data area and the lead-out area each has grooves and lands formed thereon. Wobbles are formed on at least one lateral surface of grooves of the user data area and the lead-out area, and configured such that wobble characteristics are made different between the user data area and the lead-out area. Different types of wobbles are formed on the grooves of either the user data area or the lead-out area, thereby preventing an optical pickup that performs recording/reproduction from deviating from the user data area. Also, in a multi-layer optical recording medium, a whole area of a recording layer is configured to have a same condition, thereby preventing deterioration in reproduction and/or recording due to a difference in light power transmittance of another recording layer.

Abstract: An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.