Abstract: A load driving apparatus for driving a plurality of loads is provided. The load driving apparatus includes an output stage module, a load driving module, and an output stage selection module. The output stage module includes a plurality of output stages. Each of the output stages is coupled to a corresponding one of the loads. The load driving module is coupled to the output stage module and outputs a driving signal to drive one of the loads through the output stage module. The output stage selection module is coupled between the output stage module and the load driving module and selects one of the output stages in the output stage module, so that the load driving module drives the load which is coupled to the selected output stage through the selected output stage. Furthermore, a grayscale voltage generating circuit including the foregoing load driving apparatus is also provided.

Abstract: An output buffer circuit for avoiding voltage overshoot includes an input stage, an output bias circuit, an output stage, a clamp circuit, and a control unit. The input stage includes a positive input terminal, for receiving an input voltage, and a negative input terminal. The input stage generates a current signal according to the input voltage. The output bias circuit is coupled to the input stage, for generating a dynamic bias according to the current signal. The output stage is coupled to the input stage and the output bias circuit, including an output terminal, reversely coupled to the positive input terminal, and at least one output transistor, coupled to the output bias circuit and the output terminal, for providing a driving current to the output terminal according to the dynamic bias to generate an output voltage.

Abstract: An amplifier device including a gain stage, an output stage, at least one phase compensation circuit and at least one coupling suppression device is provided. The gain stage has at least one feedback node. The output stage is coupled to the gain stage and has an output node for outputting an output voltage. Each of the at least one phase compensation circuit is coupled between a corresponding one of the at least one feedback node and the output node. Each of the at least one coupling suppression device is coupled between a corresponding one of the at least one feedback node and a respective coupling node, and is spontaneously turned on in response to a change of a voltage level at the corresponding feedback node when the corresponding feedback node is coupled by noise, thereby suppressing the change of the voltage level at the corresponding feedback node.

Abstract: A driving device for a display device is disclosed. The driving device includes a first output buffer, for generating a first source driving signal at a first output end; a second output buffer, for generating a second source driving signal at a second output end; and an electric charge storage unit, including a voltage sensing end coupled to the first output buffer and the second output buffer, for receiving and storing electric charges released by the first output buffer via the voltage sensing end when a level of the first source driving signal decreases, and for outputting the electric charges to the second output buffer via the voltage sensing end when a level of the second source driving signal increases.

Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to form a signal output path and for adjusting impedance of the signal output path when the signal output path is formed. The output control unit comprises a plurality of output switches for individually turning on or off the electrical connection between the output terminal and the capacitive load of the operational amplifier.

Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to form a signal output path and for adjusting impedance of the signal output path when the signal output path is formed.

Abstract: A display driving circuit includes: a circuit under test; a first circuit, selectively coupled to the circuit under test and selectively coupled to an output, the first circuit having a stabilization period longer than that of the circuit under test; and a test auxiliary circuit, coupled to the circuit under test. In normal operation, after a normal signal flows into the circuit under test, the normal signal flows into the first circuit but not into the test auxiliary circuit. In test, after a test signal flows into the circuit under test, the test signal flows into the test auxiliary circuit but not into the first circuit.

Abstract: A test circuit of a source driver is disclosed. The test circuit includes a voltage selector and at least one digital-to-analog converter (DAC). The voltage selector has a plurality of first output terminals. The voltage selector outputs a first voltage at one of the first output terminals in a sequential order according to a selection signal and outputs a second voltage at the other first output terminals. Each of the at least one DACs has a plurality of the input terminals respectively coupled to the first output terminals and also has a second output terminal. The DAC transmits the first voltage received by one of the input terminals to the second output terminal in a sequential order according to the selection signal.

Abstract: An amplifier device including a gain stage, an output stage, at least one phase compensation circuit and at least one coupling suppression device is provided. The gain stage has at least one feedback node. The output stage is coupled to the gain stage and has an output node for outputting an output voltage. Each of the at least one phase compensation circuit is coupled between a corresponding one of the at least one feedback node and the output node. Each of the at least one coupling suppression device is coupled between a corresponding one of the at least one feedback node and a respective coupling node, and is spontaneously turned on in response to a change of a voltage level at the corresponding feedback node when the corresponding feedback node is coupled by noise, thereby suppressing the change of the voltage level at the corresponding feedback node.

Abstract: An electronic device of a source driver in an LCD device, for enhancing accuracy of voltage outputted to an equivalent capacitor of a panel of the LCD device, includes a first node, a second node, an output unit, a first charge sharing switch, a second charge sharing switch, a first precharge switch, and a second precharge switch. The electronic device only uses two precharge switches to implement the precharge function and can decrease the current limiting resistor for enhancing the output voltage accuracy and decrease the charge time of the equivalent capacitor.

Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to forma signal output path and for adjusting impedance of the signal output path when the signal output path is formed.

Abstract: An output buffer circuit for avoiding voltage overshoot includes an input stage, an output bias circuit, an output stage, a clamp circuit, and a control unit. The input stage includes a positive input terminal, for receiving an input voltage, and a negative input terminal. The input stage generates a current signal according to the input voltage. The output bias circuit is coupled to the input stage, for generating a dynamic bias according to the current signal. The output stage is coupled to the input stage and the output bias circuit, including an output terminal, reversely coupled to the positive input terminal, and at least one output transistor, coupled to the output bias circuit and the output terminal, for providing a driving current to the output terminal according to the dynamic bias to generate an output voltage.

Abstract: A driving circuit of enhancing response speed is disclosed. The driving circuit includes an operational amplifier and a slew rate enhancement unit. The operational amplifier is utilized for generating a driving voltage according to an input voltage. The slew rate enhancement unit is coupled to the operational amplifier, and is utilized for generating a compensation current to the operational amplifier to enlarge a bias current of the operational amplifier according to voltage difference between the input voltage and the driving voltage when variation of the input voltage occurs.

Abstract: A driving method for a Liquid Crystal Display (LCD) device is used for reducing power consumption of the LCD device. The driving method includes determining a driving approach of the LCD device, and performing corresponding charge sharing on a plurality of data channels according to the driving approach. The driving approach of the LCD device is determined according to a latch data (LD) signal and a polarity signal.

Abstract: An operational amplifier capable of enhancing slew rate is disclosed. The operational amplifier includes a first current generator for generating a first bias current, a second current generator for generating a second bias current, an amplification stage, coupled to the first current generator, for generating a amplification signal according to an input signal, an output stage, coupled to the second current generator and the amplification stage, for generating an output signal according to the amplification signal, and a bias current allocation unit, coupled to the first current generator, the second current generator, the amplification stage and the output stage, for reallocating current intensities of the first bias current and the second bias current according to a control signal.

Abstract: A driving circuit of enhancing response speed is disclosed. The driving circuit includes an operational amplifier and a slew rate enhancement unit. The operational amplifier is utilized for generating a driving voltage according to an input voltage. The slew rate enhancement unit is coupled to the operational amplifier, and is utilized for generating a compensation current to the operational amplifier to enlarge a bias current of the operational amplifier according to voltage difference between the input voltage and the driving voltage when variation of the input voltage occurs.

Abstract: An operational amplifier capable of enhancing slew rate is disclosed. The operational amplifier includes a first current generator for generating a first bias current, a second current generator for generating a second bias current, an amplification stage, coupled to the first current generator, for generating a amplification signal according to an input signal, an output stage, coupled to the second current generator and the amplification stage, for generating an output signal according to the amplification signal, and a bias current allocation unit, coupled to the first current generator, the second current generator, the amplification stage and the output stage, for reallocating current intensities of the first bias current and the second bias current according to a control signal.

Abstract: An electronic device of a source driver in an LCD device, for enhancing accuracy of voltage outputted to an equivalent capacitor of a panel of the LCD device, includes a first node, a second node, an output unit, a first charge sharing switch, a second charge sharing switch, a first precharge switch, and a second precharge switch. The electronic device only uses two precharge switches to implement the precharge function and can decrease the current limiting resistor for enhancing the output voltage accuracy and decrease the charge time of the equivalent capacitor.