摘要:
The present invention relates to a liquid crystal display, a driving device thereof, a digital to analog converter, and an output voltage amplifying circuit. The present invention provides a liquid crystal display driving device including a reference gray voltage generator for generating a plurality of reference gray voltages, and a data driver for generating a plurality of gray voltages based on the plurality of reference gray voltages and applying a data signal that is generated by selecting a gray voltage corresponding to m-bit video signals applied from the outside from among the plurality of gray voltages to the pixel The data driver includes: a voltage generator for selecting a first gray voltage and a second gray voltage corresponding to bit values of (m−k) bits from among the video signal from among the plurality of gray voltages, and outputting the first and second gray voltages; an output voltage generator for outputting 2k voltages determined as one of the first and second gray voltages corresponding to bit values of k bits from among the video signal; and an output voltage amplifier for generating the data signal by combining the 2k voltages, and applying the data signal to a plurality of pixels. According to the present invention, a liquid crystal display having a small cost and area can be realized.
摘要:
An amplifying circuit of a display device including a plurality of pixels includes an input unit, a bias unit, and an output unit. The input unit is coupled between a first power source for supplying a first voltage and a second power source for supplying a second voltage, receives a first input signal and a second input signal, and is controlled by the first and second input signals. The bias unit receives a bias voltage for operating the input unit, and includes a first node and a second node controllable by the input unit. The output unit applies an output voltage to a pixel by using a first output transistor turned on/off by a signal applied to the first node and a second output transistor turned on/off by a signal applied to the second node, and the first output transistor is a different type to the second output transistor. In this instance, the input unit includes a first input transistor having a first terminal coupled to a first power source and being turned on/off by a first input signal and a second input transistor of the same type as the first input transistor, having a first terminal coupled to the first power source, and being turned on/off by a second input signal. The bias unit includes a first transistor controllable by the on/off state of the first input transistor and a second transistor controllable by the on/off state of the second input transistor.
摘要:
An amplifying circuit of a display device including a plurality of pixels includes an input unit, a bias unit, and an output unit. The input unit is coupled between a first power source for supplying a first voltage and a second power source for supplying a second voltage, receives a first input signal and a second input signal, and is controlled by the first and second input signals. The bias unit receives a bias voltage for operating the input unit, and includes a first node and a second node controllable by the input unit. The output unit applies an output voltage to a pixel by using a first output transistor turned on/off by a signal applied to the first node and a second output transistor turned on/off by a signal applied to the second node, and the first output transistor is a different type to the second output transistor. In this instance, the input unit includes a first input transistor having a first terminal coupled to a first power source and being turned on/off by a first input signal and a second input transistor of the same type as the first input transistor, having a first terminal coupled to the first power source, and being turned on/off by a second input signal. The bias unit includes a first transistor controllable by the on/off state of the first input transistor and a second transistor controllable by the on/off state of the second input transistor.
摘要:
The present invention relates to a liquid crystal display, a driving device thereof, a digital to analog converter, and an output voltage amplifying circuit. The present invention provides a liquid crystal display driving device including a reference gray voltage generator for generating a plurality of reference gray voltages, and a data driver for generating a plurality of gray voltages based on the plurality of reference gray voltages and applying a data signal that is generated by selecting a gray voltage corresponding to m-bit video signals applied from the outside from among the plurality of gray voltages to the pixel The data driver includes: a voltage generator for selecting a first gray voltage and a second gray voltage corresponding to bit values of (m−k) bits from among the video signal from among the plurality of gray voltages, and outputting the first and second gray voltages; an output voltage generator for outputting 2k voltages determined as one of the first and second gray voltages corresponding to bit values of k bits from among the video signal; and an output voltage amplifier for generating the data signal by combining the 2k voltages, and applying the data signal to a plurality of pixels. According to the present invention, a liquid crystal display having a small cost and area can be realized.
摘要:
An output voltage amplifier, and a driving device of a liquid crystal display using the same are disclosed. The output voltage amplifier includes: an amplifying unit to generate first and second signals corresponding to a gray voltage input to a first input terminal and a feedback signal input to a second input terminal, and to output a first voltage by using first and second switches driven to be on or off according to the first and second signals; an output unit to apply the first and second data signals to the first and second pixels by using third and fourth switches turned on or off according to the first and second signals; and a feedback circuit unit to selectively supply one of the first voltage and the first and second data signals to the second input terminal. Heating characteristics and a slew rate can be improved.
摘要:
A boiler furnace avoids NOx and increases thermal efficiency with a small boiler. The boiler furnace has a outer water walls and inner water walls. All of the water walls contain water which absorb heat from the flame and cool the water tube which act as a container, passage, evaporator of water and water walls with membrane that connect water tubes to each other. The spaces between outer water walls and inner water walls makes a cylindrical space which contain fires and avoids making a fire that produces nitrogen oxides due to high temperature induced from a concentrated flame.
摘要:
Disclosed is a low power and high density source driver and a current driven active matrix organic electroluminescent device having the same, in which all elements operate at a normal voltage and all circuits of the source driver are shielded from a high voltage of a panel. The source driver includes: a shift register for generating an enable signal for storing data; a data latch circuit for storing digital data inputted from an exterior; a line latch circuit for sequentially storing the data in response to the enable signal and outputting the stored data in parallel at one time in response to a load signal; a current type digital-to-analog converter for converting the digital data outputted from the line latch circuit into an analog signal, the analog signal being outputted in a form of a current signal; and a high voltage shield circuit for transferring the output of the current digital-to-analog converter to source lines of an external panel and for shielding internal circuits from a high voltage of the panel. The shift register, the data latch circuit, the line latch circuit, the current type digital-to-analog converter and the high voltage shield circuit are driven at a normal voltage.
摘要:
A method and apparatus for acquiring a refined carrier frequency by optimizing search areas are provided. The apparatus for acquiring a refined carrier frequency by optimizing search areas includes: a refined signal generation unit using a coarse carrier frequency and a coarse code phase extracted from a digitized signal and obtaining a refined carrier frequency approximated to the carrier frequency of an original signal from which the digitized signal is obtained by conversion; and a refined carrier frequency searching unit setting and providing a search area in which the refined signal acquisition unit can obtain the refined carrier frequency based on the coarse carrier frequency. According to the method and apparatus, as a result of the searching method reducing a search time, acquisition of a refined carrier frequency as well as fast acquisition of a signal is enabled, thereby allowing a precise initial value to be provided to a signal tracking unit.
摘要:
A boiler furnace avoids NOx and increases thermal efficiency with a small boiler. The boiler furnace has a outer water walls and inner water walls. All of the water walls contain water which absorb heat from the flame and cool the water tube which act as a container, passage, evaporator of water and water walls with membrane that connect water tubes to each other. The spaces between outer water walls and inner water walls makes a cylindrical space which contain fires and avoids making a fire that produces nitrogen oxides due to high temperature induced from a concentrated flame.
摘要:
The present invention relates to an inverter for outputting high voltage in use of CMOS transistors of low voltage, more particularly, to a circuit generating a high voltage output without subsidiary shield voltage. The present invention, wherein an inverter circuit generates high voltage in use of low voltage transistors, includes a first PMOS of which gate is supplied with a high input signal and of which source is connected to a power supply terminal, a second PMOS of which source is connected to a drain of the first PMOS and of which drain is connected to an output terminal, a first NMOS of which gate is connected to a low input signal and of which source is connected to a ground terminal, a second NMOS of which source is connected to a drain of the first NMOS and of which drain is connected to the output terminal, a third PMOS of which gate and source is connected to a high input signal and of which drain is connected to a gate of the second PMOS, and a third NMOS of which gate and source are connected to a low input signal and of which drain is connected to a gate of the second NMOS and the drain of the third PMOS.