摘要:
Disclosed herein is an apparatus for driving a plasma display panel in which a gray scale inversion phenomenon can be prevented. According to the present invention, the apparatus for driving the PDP includes an error diffusion unit for diffusing error of data received from an inverse gamma correction unit, a gray scale inversion check unit connected to the inverse gamma correction unit, for checking whether a gray scale value of the data received from the inverse gamma correction unit is a gray scale value where a gray scale inversion phenomenon is generated, and generating a 1-bit control signal according to the check result, an adder disposed between the error diffusion unit and the gray scale inversion check unit, for adding the 1-bit control signal to lower bits of the data received from the error diffusion unit, and a dithering unit for performing dithering by using the lower bits received from the adder. Therefore, when dithering is performed on data where gray scale inversion is generated, a gray scale value can be improved by adding 1 to lowest bits of the data. It is thus possible to prevent the gray scale inversion phenomenon.
摘要:
A plasma display apparatus is provided. The plasma display apparatus comprises a data driver comprising a data arranging unit. Accordingly, the manufacturing cost of the plasma display apparatus decreases. Further, a signal loss and a noise according to data transmission decrease.
摘要:
Disclosed therein is an apparatus for driving a plasma display panel, with a simple structure. The apparatus includes a signal processor for converting an external image signal into image data suitable for driving the plasma display panel; a data arranger for reconstructing the image data to a plurality of sub-fields in order to process the gray scale of the image data converted by the signal processor and serially transmitting control data corresponding to one or more scan lines; an X-electrode driver for receiving the control data corresponding to one or more scan lines from the data arranger and applying an address pulse corresponding to the control data to X electrodes; a Y-electrode driver for applying a scan pulse for addressing and a sustain pulse for maintaining a discharge to Y electrodes; a Z-electrode driver for applying the sustain pulse for maintaining a discharge to Z electrodes; and a main controller for performing a control operation to sequentially read out the image data reconstructed by the data arranger according to the external image signal and to transmit the control data corresponding to one or more scan lines to the X-electrode driver.
摘要:
Disclosed therein is an apparatus for driving a plasma display panel, with a simple structure. The apparatus includes a signal processor for converting an external image signal into image data suitable for driving the plasma display panel; a data arranger for reconstructing the image data to a plurality of sub-fields in order to process the gray scale of the image data converted by the signal processor and serially transmitting control data corresponding to one or more scan lines; an X-electrode driver for receiving the control data corresponding to one or more scan lines from the data arranger and applying an address pulse corresponding to the control data to X electrodes; a Y-electrode driver for applying a scan pulse for addressing and a sustain pulse for maintaining a discharge to Y electrodes; a Z-electrode driver for applying the sustain pulse for maintaining a discharge to Z electrodes; and a main controller for performing a control operation to sequentially read out the image data reconstructed by the data arranger according to the external image signal and to transmit the control data corresponding to one or more scan lines to the X-electrode driver.
摘要:
A flash memory device having a function of selectively changing a precharge voltage for a sensing node and a read operation method thereof. The flash memory device includes a memory cell array, a precharge voltage generator, and a plurality of page buffers. The memory cell array includes a plurality of memory cells respectively sharing a plurality of word lines and a plurality of bit lines. The precharge voltage generator outputs one of first and second voltage as a precharge voltage in response to a selection control signal. The plurality of page buffers are connected to every pair of the plurality of bit lines one by one and precharge sensing lines to the precharge voltage in response to a precharge control signal.
摘要:
Disclosed herein is a process for preparing a metal or nonmetal phthalocyanine by using both microwave and ultrasonic wave energy in the presence of a solvent, or by using microwave energy in the absence of a solvent. Specifically, according to the process, anhydrous phthalic acid, phthalimide, 1,3-diiminoisoindoline, 1,2-dicyanobenzene, an halogen derivative thereof, an alkyl_derivative thereof or an alkoxy derivative thereof is mixed with a metal chloride or an alkoxy metal at 130250° C. for 0.2515 hours by using microwave at a frequency of 0.1-1000 Hz and a power of 100-3,000 W and ultrasonic wave at a frequency of 1-1,000 GHz and a power of 100-5,000 W in the presence of a solvent, or by using microwave at a frequency of 0.1-100 GHz and a power of 100-4,000 W in the absence of a solvent. Further disclosed is an apparatus for preparing a metal or nonmetal phthalocyanine in the absence or presence of solvent.
摘要:
Provided are a terminal supporting peer-to-peer (P2P) communication, a communication method using the terminal, and a billing method based on the terminal. A transceiver of the terminal is implemented to support P2P communication with an adjacent terminal in the same cell. Thus, when short-range communication is possible, the terminal performs P2P communication directly with the adjacent terminal, not via a base station. Consequently, when terminals use different mobile telecommunication service providers or there is no base station network, the terminals can be used for short-range communication. When a receiving channel state becomes satisfactory while communication with an adjacent terminal is being performed via a base station, the terminal switches to a P2P communication mode and performs communication with the adjacent terminal. On the contrary, when the receiving channel state deteriorates while communication with the adjacent terminal is being performed in the P2P communication mode, the terminal switches to a base station communication mode and performs communication with the adjacent terminal. Therefore, it is possible to use the terminal for short-range communication without attaching an additional short-range communication module to the terminal.
摘要:
Provided is a voltage multiplier converting an alternating current (AC) electromagnetic wave into a direct current (DC) voltage signal in a radio frequency identification (RFID) tag, and including means for obtaining voltage gain, the means being connected to an input terminal through which the AC electromagnetic wave is input. The voltage multiplier can generate a greater DC output voltage than a conventional voltage multiplier at the same input power. Therefore, a desired DC output voltage can be obtained at low input power, so that an effective operating distance can be increased. In addition, since the voltage multiplier is easily integrated into a tag chip using a complementary metal-oxide semiconductor (CMOS) process, the size of the tag does not increase and it is easy to package an antenna and the tag chip.
摘要:
A compatible optical pick-up apparatus, which records to and/or reproduce from both digital versatile disc (DVD)-type optical disks and compact disc (CD)-type optical disks for improving a signal regeneration capacity and a tracking capacity in operation at a high temperature. A polarized hologram of the optical pick-up apparatus is divided into six diffraction regions. The rays of a first light diffracted at the first and second diffraction regions are separately received by divided parts of a first bisected light-receiving portion of a photodetector.
摘要:
Provided is a low-complexity and low-power-consumption turbo decoder with a variable scaling factor. The performance of the turbo decoder is enhanced by evaluating a decoding convergence degree of the turbo decoder using a sign difference ratio (SDR) value, limiting the iterative-decoding number, and calculating and applying a variable scaling factor producing optimal performance in each decoding convergence area based on the SDR value, and power consumption is reduced by reducing the average number of decoding iterations. Thus, the performance degradation when the encoded block is large, which is a shortcoming of a conventional EMLMAP algorithm, can be prevented, the average number of decoding iterations can be reduced, and accordingly power consumption can be reduced.