Abstract: Provided is a directional backlight unit. The directional backlight unit includes a source light unit configured to generate dot source light, a linear source light generator configured to separate a plurality of source lights, which are output in a direction vertical to a line type output surface, from the dot source light according to different grating periods and generate the separated plurality of source lights as linear source lights, and a light guide panel configured to output backlight, which has a form of flat source lights and includes the plurality of source lights, in a direction vertical to a plate type output surface according to the different grating periods. The linear source light generator includes an incident surface on which the dot source light is incident and the line type output surface on which a plurality of grating patterns having the different grating periods are provided.

Abstract: Provided herein is a single module bi-directional optical transmitting and receiving system including a transmitter transmitting an optical signal by converting a down-signal, and obtaining an up-signal by converting y the optical signal that is received, and a receiver transmitting the optical signal by converting the up-signal, and obtaining the down-signal by converting the optical signal that is received, wherein the transmitter and the receiver include a single optical transmitting module including a monitor receiving module, transmit the optical signal through the single optical transmitting module, and receive the optical signal through the monitor receiving module.

Abstract: A display device includes a display panel, and a depth perception adjusting unit for adjusting a depth perception, based on polarization characteristics of light output from the display panel, wherein the depth perception adjusting unit includes a directional mirror and a reflective polarizer. Thus, the display device is implemented such that the directional mirror transmits or reflects light depending on an advancing direction of the light. Accordingly, any crosstalk phenomenon does not occur, and a depth perception can be adjusted without any loss of brightness efficiency.

Abstract: A display device includes a display panel, and a depth perception adjusting unit for adjusting a depth perception, based on polarization characteristics of light output from the display panel, wherein the depth perception adjusting unit includes a directional mirror and a reflective polarizer. Thus, the display device is implemented such that the directional mirror transmits or reflects light depending on an advancing direction of the light. Accordingly, any crosstalk phenomenon does not occur, and a depth perception can be adjusted without any loss of brightness efficiency.

Abstract: Provided herein is a single module bi-directional optical transmitting and receiving system including a transmitter transmitting an optical signal by converting a down-signal, and obtaining an up-signal by converting y the optical signal that is received, and a receiver transmitting the optical signal by converting the up-signal, and obtaining the down-signal by converting the optical signal that is received, wherein the transmitter and the receiver include a single optical transmitting module including a monitor receiving module, transmit the optical signal through the single optical transmitting module, and receive the optical signal through the monitor receiving module.

Abstract: Provided is a display apparatus. The display apparatus includes a backlight unit configured to successively output backlight at multi output angles and a display module configured to successively output a 3D image corresponding to the backlight in multi output directions respectively corresponding to the multi output angles.

Abstract: Provided is a directional backlight unit. The directional backlight unit includes a source light unit configured to generate dot source light, a linear source light generator configured to separate a plurality of source lights, which are output in a direction vertical to a line type output surface, from the dot source light according to different grating periods and generate the separated plurality of source lights as linear source lights, and a light guide panel configured to output backlight, which has a form of flat source lights and includes the plurality of source lights, in a direction vertical to a plate type output surface according to the different grating periods. The linear source light generator includes an incident surface on which the dot source light is incident and the line type output surface on which a plurality of grating patterns having the different grating periods are provided.

Abstract: Provided is a directional backlight unit that enables a three-dimensional (3D) image to be viewed at various viewing angles. The directional backlight unit includes a light source configured to emit light, a first reflector configured to reflect light emitted from the light source, a second reflector configured to additionally reflect the light reflected by the first reflector, a light guide plate configured to accommodate the light reflected by the first reflector or the second reflector and output the light to an outside, and an angle adjustor configured to rotate the first reflector or the second reflector to a reflective angle. The angle adjustor rotates the first reflector or the second reflector to change an incident angle of the light incident on the light guide plate and a refractive angle of the light output to the outside.

Abstract: An image forming apparatus and a control method thereof in which occurrence or removal of a paper rolling state in a fusing device is judged based on temperature of the fusing device. The apparatus includes a temperature sensor to sense temperature of the fusing device, a memory to store information about occurrence or removal of the paper rolling state, and a controller to judge occurrence or removal of the paper rolling state. The controller detects an initial temperature of the fusing device when the apparatus is turned off and then on in a state in which the information about occurrence of the paper rolling state is stored in the memory, heats the fusing device by applying power thereto for a predetermined time based on the initial temperature, and judges occurrence or removal of the paper rolling state based on temperature of the fusing device detected after power application.

Abstract: Provided is a directional backlight unit that enables a three-dimensional (3D) image to be viewed at various viewing angles. The directional backlight unit includes a light source configured to emit light, a first reflector configured to reflect light emitted from the light source, a second reflector configured to additionally reflect the light reflected by the first reflector, a light guide plate configured to accommodate the light reflected by the first reflector or the second reflector and output the light to an outside, and an angle adjustor configured to rotate the first reflector or the second reflector to a reflective angle. The angle adjustor rotates the first reflector or the second reflector to change an incident angle of the light incident on the light guide plate and a refractive angle of the light output to the outside.

Abstract: An image forming apparatus and a control method thereof in which occurrence or removal of a paper rolling state in a fusing device is judged based on temperature of the fusing device. The apparatus includes a temperature sensor to sense temperature of the fusing device, a memory to store information about occurrence or removal of the paper rolling state, and a controller to judge occurrence or removal of the paper rolling state. The controller detects an initial temperature of the fusing device when the apparatus is turned off and then on in a state in which the information about occurrence of the paper rolling state is stored in the memory, heats the fusing device by applying power thereto for a predetermined time based on the initial temperature, and judges occurrence or removal of the paper rolling state based on temperature of the fusing device detected after power application.

Abstract: Disclosed is an image forming apparatus capable of controlling a fuser thereof to operate effectively even with a possible fluctuation in the AC voltage input. The image forming apparatus may include an input for receiving an AC voltage, a detector that outputs a DC voltage corresponding to a level of the AC voltage input, a fuser operable to produce heat according to the AC voltage input, a storage in which fusing temperature control information and a controller that controls the fuser using the fusing temperature control information corresponding to the DC voltage.

Abstract: Disclosed is an image forming apparatus incorporating a discharging unit that discharges a printing medium outside the housing of the image forming apparatus, and which stacks the discharged printing medium. The discharging unit includes a discharging part arranged on the transportation path of the printing medium in the housing, a stacking lever rotatably supported on the housing and a driving unit that drives the stacking lever to rotate. The discharging part discharges a printing medium outside the housing, and stacks the discharged printing medium on a stacking unit provided outside the housing. The stacking lever guides the stacking of the printing medium in the stacking unit. A control unit may be provided to control the driving unit so as to vary the revolution position of the stacking lever based on the discharged position of the printing medium discharged by the discharging part.

Abstract: Disclosed is an image forming apparatus capable of controlling a fuser thereof to operate effectively even with a possible fluctuation in the AC voltage input. The image forming apparatus may include an input for receiving an AC voltage, a detector that outputs a DC voltage corresponding to a level of the AC voltage input, a fuser operable to produce heat according to the AC voltage input, a storage in which fusing temperature control information and a controller that controls the fuser using the fusing temperature control information corresponding to the DC voltage.

Abstract: A developer filling apparatus includes a developer supply container for containing a developer and compressed air, the developer supply container includes a developer discharge mechanism, the developer discharge mechanism including a developer outlet opening for discharging the developer and compressed air, and a valve structure disposed at the developer outlet opening for normally closing the developer outlet opening and for opening the developer outlet opening upon application of an external force. Accordingly, because a developer cartridge can be easily filled with a developer using the force of compressed air in a developer filling operation, the developer filling operation can be performed more easily in comparison to a conventional manual one utilizing a developer measuring container. In addition, the developer is prevented from being blown around during the developer filling operation, thereby improving working conditions and avoiding environmental pollution.

Abstract: Disclosed is a remote control system in a mobile communication terminal and method thereof enabling a user to use the mobile communication terminal not only passively but also actively. The present invention includes a first step of receiving a remote control command from a subscriber, a second step of recording the remote control command in a reserved field of the page message, a third step of transmitting the page message to the mobile communication terminal, and a fourth step of having the mobile communication terminal operate in accordance with the remote control command included in the page message.

Abstract: A duplex automatic document feeder (DADF) includes a pickup roller, an image reading unit, and a discharge roller, and includes first, second, third, and fourth document feeding paths. When performing duplex scanning in the DADF, the document is fed from the pickup roller to the image reading unit through the second document feeding path, and then the document passes through the third document feeding path, which is a closed-loop feeding path, to reverse feed the document back to the image reading unit, so that both sides of the document are scanned. Next, the document is discharged by the discharge roller. When discharged, the front side of the document faces down corresponding to the document as stacked in a paper supply tray. Accordingly, an additional feeding path for rearrangement of the discharged document can be omitted, thereby improving duplex efficiency.

Abstract: A developer filling apparatus includes a developer supply container for containing a developer and compressed air, the developer supply container includes a developer discharge mechanism, the developer discharge mechanism including a developer outlet opening for discharging the developer and compressed air, and a valve structure disposed at the developer outlet opening for normally closing the developer outlet opening and for opening the developer outlet opening upon application of an external force. Accordingly, because a developer cartridge can be easily filled with a developer using the force of compressed air in a developer filling operation, the developer filling operation can be performed more easily in comparison to a conventional manual one utilizing a developer measuring container. In addition, the developer is prevented from being blown around during the developer filling operation, thereby improving working conditions and avoiding environmental pollution.

Abstract: Disclosed is a remote control system in a mobile communication terminal and method thereof enabling a user to use the mobile communication terminal not only passively but also actively. The present invention includes a first step of receiving a remote control command from a subscriber, a second step of recording the remote control command in a reserved field of the page message, a third step of transmitting the page message to the mobile communication terminal, and a fourth step of having the mobile communication terminal operate in accordance with the remote control command included in the page message.

Abstract: Disclosed is a remote control system in a mobile communication terminal and method thereof enabling a user to use the mobile communication terminal not only passively but also actively. The present invention includes a first step of receiving a remote control command from a subscriber, a second step of recording the remote control command in a reserved field of the page message, a third step of transmitting the page message to the mobile communication terminal, and a fourth step of having the mobile communication terminal operate in accordance with the remote control command included in the page message.