Abstract: A source driver and a liquid crystal display (LCD) device having the same. A source driver may carry a clock in a data current, and may recover a clock signal and/or a data signal without being substantially affected by external frequencies and/or resistance. A source driver may include a trans-impedance amplifier which may receive data currents, convert data currents into voltages, and/or output voltages as data voltages and/or clock voltages. A source driver may include a comparator electrically coupled to a trans-impedance amplifier, which may change levels of data and/or clock voltages applied from a trans-impedance amplifier, and/or may output level-changed voltages as data signals and/or a clock signal.

Abstract: An AMP output protective circuit for an LCD panel source driver is disclosed. To solve a problem that internal diodes of PMOS/NMOS of an AMP output circuit are turned on, embodiments are characterized in making input and output voltages of the AMP in a charge sharing interval equal to HVDD and short-circuiting outputs of PAMP and NAMP with VRST_GH and VRST_GL lines, respectively. Accordingly, since there is no increase of voltage (Vth) attributed to a body effect, a speed is not reduced. An additional body bias control circuit is unnecessary. Power consumption can be reduced. Also, an AMP circuit can be more safely protected by adding an output reset function and an AMP protecting circuit.

Abstract: An AMP output protective circuit for an LCD panel source driver is disclosed. To solve a problem that internal diodes of PMOS/NMOS of an AMP output circuit are turned on, embodiments are characterized in making input and output voltages of the AMP in a charge sharing interval equal to HVDD and short-circuiting outputs of PAMP and NAMP with VRST_GH and VRST_GL lines, respectively. Accordingly, since there is no increase of voltage (Vth) attributed to a body effect, a speed is not reduced. An additional body bias control circuit is unnecessary. Power consumption can be reduced. Also, an AMP circuit can be more safely protected by adding an output reset function and an AMP protecting circuit.

Abstract: A source driver and a liquid crystal display (LCD) device having the same. A source driver may carry a clock in a data current, and may recover a clock signal and/or a data signal without being substantially affected by external frequencies and/or resistance. A source driver may include a trans-impedance amplifier which may receive data currents, convert data currents into voltages, and/or output voltages as data voltages and/or clock voltages. A source driver may include a comparator electrically coupled to a trans-impedance amplifier, which may change levels of data and/or clock voltages applied from a trans-impedance amplifier, and/or may output level-changed voltages as data signals and/or a clock signal.

Abstract: There is provided a differential current driving current type transmission system. The system includes a transmission line pair for transmitting a signal by a differential scheme; a transmission unit having a transmission circuit for making the transmission line pair have a current difference according to a logic value of a transmission signal and equalizing the transmission line pair at a predetermined timing, and a transmission controller for controlling the signal transmission of the transmission circuit and the equalization of the transmission line pair; and a receiving unit having an I-V converter circuit for mirroring a current difference of the transmission line pair and converting the current difference into a voltage difference, and a differential amplifier for amplifying the voltage difference of the I-V converter circuit.

Abstract: A liquid crystal display (LCD) driver integrated circuit (IC) is provided. The LCD driver IC, according to an embodiment, can include gamma reference buffers built in respective source drivers, where an output connection resistance is provided for connecting an output of a gamma reference buffer of one source driver to an output of a gamma reference buffer of another source driver.

Abstract: Provided are a liquid crystal display (LCD) driver integrated circuit (IC) and a method for manufacturing the same. The LCD driver IC comprises a conductor, a first passivation layer, a first bump, and a first lead. The conductor is disposed on a source driver. The first passivation is disposed on the conductor and comprises a first trench exposing an upper side of the conductor. The first bump fills the first trench. The first lead is disposed on the first bump.

Abstract: Disclosed is an inner shell for safety helmets, which is massproduced and has a structure capable of efficiently absorbing and dispersing an impact, and a method of producing the same, which ensures the reduced material costs and the improved workability and productivity. The inner shell (10) includes a liner member (12) having openings at upper and lower parts thereof, and an impact absorbing member (14) surrounding a circumference of the liner member (12). The method includes injection-molding a molten plastic resin into a predetermined shape of liner member (12), putting the molded liner member (12) in a metal mold, forming the impact absorbing member (14) using a foamed resin, including Styrofoam, a polyethylene foam, and a urethane foam, in the metal mold after the metal mold is hermetically sealed, separating the inner shell (10) from the metal mold, and finishing the inner shell (10).

Abstract: A TFT-LCD source driver for driving L channels of a liquid crystal panel (where L is a positive integer), the TFT-LCD source driver comprising a plurality of DACs (digital-to-analog converters) for converting (M+N)-bit different digital signals into analog signals (where M and N are positive integers), the DAC including: a coarse gradation voltage generator, configured with 2M resistors connected in series, for generating 2M gradation voltages; a first decoder for selecting two consecutive voltages among the 2M gradation voltages in response to M-bit digital signals; a fine gradation voltage generator, configured with 2N resistors connected in series, for receiving output voltages of the first decoder and outputting 2N gradation voltages; and a second decoder for selecting one of the 2N gradation voltages in response to the N-bit digital signals and outputting the selected gradation voltage as the analog signal.

Abstract: A semiconductor device chip includes channel blocks each of which includes channels, each of the channels including unit devices placed in a substrate and well regions; first metal interconnection lines connected to the unit devices comprising the channels to receive and transfer data signals from and to the external side; normal bumps for transferring the data signals received by the first metal interconnection lines through first external interconnection lines to be connected to the external side; second metal interconnection lines placed between the channel blocks, each of the second metal interconnection lines being connected to one of the substrate and a corresponding well region; and first heat transfer bumps placed over the second metal interconnection lines to receive the heat generated during driving the channel blocks through the second metal interconnection lines and transfer the received heat to second external interconnection lines to be connected to the external side.

Abstract: A backpack for back-mounting a compressed-air cylinder, fastened to the backpack by a cylinder fastening belt, when a user wears harnesses and a waist belt. The backpack inlcudes a backboard (100) having support hooks (105) to support the compressed-air cylinder (50); a harness support (130) for the harnesses (30) coupled to the backboard (100) so as to rotate upwards and downwards around the center; a waist protector (120) coupled to the backboard (100) in the back of the harness support (130) so as to cover and protect the back of the user's waist; and a rotary unit for rotatably supporting both the harness support (130) and the waist protector (120) on the backboard (100). The waist protector and the harness support move separately from the backboard by the rotary unit, thus allowing the user to work without stressed by the waist belt or the harnesses.

Abstract: A backpack for back-mounting a compressed-air cylinder, fastened to the backpack by a cylinder fastening belt, when a user wears harnesses and a waist belt. The backpack inlcudes a backboard (100) having support hooks (105) to support the compressed-air cylinder (50); a harness support (130) for the harnesses (30) coupled to the backboard (100) so as to rotate upwards and downwards around the center; a waist protector (120) coupled to the backboard (100) in the back of the harness support (130) so as to cover and protect the back of the user's waist; and a rotary unit for rotatably supporting both the harness support (130) and the waist protector (120) on the backboard (100). The waist protector and the harness support move separately from the backboard by the rotary unit, thus allowing the user to work without stressed by the waist belt or the harnesses.

Abstract: A semiconductor device chip includes channel blocks each of which includes channels, each of the channels including unit devices placed in a substrate and well regions; first metal interconnection lines connected to the unit devices comprising the channels to receive and transfer data signals from and to the external side; normal bumps for transferring the data signals received by the first metal interconnection lines through first external interconnection lines to be connected to the external side; second metal interconnection lines placed between the channel blocks, each of the second metal interconnection lines being connected to one of the substrate and a corresponding well region; and first heat transfer bumps placed over the second metal interconnection lines to receive the heat generated during driving the channel blocks through the second metal interconnection lines and transfer the received heat to second external interconnection lines to be connected to the external side.

Abstract: There is provided a differential current driving current type transmission system. The system includes a transmission line pair for transmitting a signal by a differential scheme; a transmission unit having a transmission circuit for making the transmission line pair have a current difference according to a logic value of a transmission signal and equalizing the transmission line pair at a predetermined timing, and a transmission controller for controlling the signal transmission of the transmission circuit and the equalization of the transmission line pair; and a receiving unit having an I-V converter circuit for mirroring a current difference of the transmission line pair and converting the current difference into a voltage difference, and a differential amplifier for amplifying the voltage difference of the I-V converter circuit.

Abstract: A TFT-LCD source driver for driving L channels of a liquid crystal panel (where L is a positive integer), the TFT-LCD source driver comprising a plurality of DACs (digital-to-analog converters) for converting (M+N)-bit different digital signals into analog signals (where M and N are positive integers), the DAC including: a coarse gradation voltage generator, configured with 2M resistors connected in series, for generating 2M gradation voltages; a first decoder for selecting two consecutive voltages among the 2M gradation voltages in response to M-bit digital signals; a fine gradation voltage generator, configured with 2N resistors connected in series, for receiving output voltages of the first decoder and outputting 2N gradation voltages; and a second decoder for selecting one of the 2N gradation voltages in response to the N-bit digital signals and outputting the selected gradation voltage as the analog signal.