Novatek Microelectronics Corp.

Yueh-Hsiu Liu

Chih-Jen Yen

Ju-Lin Huang

Yu-Shao Liu

Tung-Shuan Cheng

Peng-Yu Chen

Kai-Shu Han

Chin-Hung Hsu

Kuang-Feng Sung

Yi-Chuan Liu

Jr-Ching Lin

Wei-Ta Chiu

Chih-Chiang Chuang

Chih-Yung Hsu

Yueh-Hsun Tsai

Li-Jun Chen

Hsin-Yih Li

A source driver utilized for a display device and switching between two operational modes includes a reception module for receiving a plurality of display information and a plurality of transmission channels. Each transmission channel includes a register module for receiving one of the plurality of display information; a voltage level transformer for determining a voltage level of the one of display information; a polarization digital-to-analog converter for processing a digital-to-analog operation for the voltage level of the one display information; and an output module for outputting a plurality of voltage levels of the display information. The voltage levels of every two adjacent transmission channels include different polarization of voltage levels, and the output module processes an odd-number switching operation before outputting the plurality of voltage levels.

Source driver and driving method thereof

A gamma-voltage generator is provided to generating a plurality of first gamma voltages and second gamma voltages. At least one of the first gamma voltages generated by DACs of the gamma-voltage generator within a first frame period and at least one of the second gamma voltages generated by the DACs within a second frame period are outputted from a same one of the gamma buffers of the gamma-voltage generator, whereby the transmitted gamma voltages have substantially equal offset. Therefore, the display quality approaches an ideal condition.

Gamma-voltage generator

A driving circuit of flat display including a charging circuit path, a discharging circuit path, and a detecting circuit is provided. The charging circuit path has first and second impedance states, wherein an impedance value of the first impedance state is smaller than that of the second impedance state. The discharging circuit path has third and fourth impedance states, wherein an impedance value of the third impedance state is smaller than that of the fourth impedance state. The detecting circuit detects whether the charging circuit path or the discharging circuit path is in an unstable first state or stable second state, controls the charging circuit path to the first impedance state or the discharging circuit path to the third impedance state in the first state, and controls the charging circuit path to the second impedance state or the discharging circuit path to the fourth impedance state in the second state.

Driving circuit of flat display

A frame maintaining circuit including a detection circuit and a display control circuit is provided. The detection circuit detects an unusual status to output a status feedback signal. The display control circuit maintains a frame displayed by a display apparatus according to the status feedback signal until the unusual status ceases.

Frame maintaining circuit and frame maintaining method

A driving method is provided for reducing power consumption of a liquid crystal display. The driving method includes steps of sequentially receiving first data and second data, determining whether the second data is the same as the first data, and controlling a data-line driving circuit not to read in driving data corresponding to the second data when the second data is the same as the first data.

Driving method and related device for reducing power consumption of LCD by comparing received data

A driving device of a liquid crystal display (LCD) utilized for preventing noises of a clock signal from causing error operation of a shift register is disclosed. The driving device includes a shift register, a reception terminal, a noise elimination circuit and a control signal generation circuit. The reception terminal is utilized for receiving a first clock signal. The noise elimination circuit is coupled to the reception terminal, and is utilized for eliminating noises of the first clock signal and delaying the first clock signal for a preset time to generate a second clock signal. The control signal generation circuit is coupled to the reception terminal, the noise elimination circuit and the shift register, and is utilized for generating a first control signal and a second control signal to control the shift register.

Driving device for liquid crystal display

The present invention provides a differential signal interfacing device, including a reduced swing differential signaling (RSDS) transmitter and a plurality of RSDS receivers, in order to improve RSDS signal capacity. The RSDS transmitter is coupled to the plurality of RSDS receivers via a bus and transmits a RSDS signal in a discontinuous manner. The plurality of RSDS receivers receives the RSDS signal for signals of different types.

Differential signal interfacing device and related method

A shift register circuit includes a plurality of bit register units, coupled in series, for transferring an input signal among the plurality of bit register units to sequentially output the input signal to a plurality of data output terminals according to a control signal and a clock signal, wherein the number of the plurality of data output terminals is greater than that of the plurality of bit register units, and a control unit for generating the control signal to control transference of the input signal.

Shift register circuit

A control circuit for an operational amplifier and a method thereof are provided to dynamically modulate the operational amplifier for strong driving capability and power saving. The control circuit comprises a bias unit coupled to the operational amplifier and a control unit coupled to the bias unit. The bias unit normally outputs a bias signal to bias the operational amplifier so that the operational amplifier has a first driving capability. However, when the driving capability of the operational amplifier needs to be adjusted, the control unit receives a modulating signal and outputs a control signal according to the modulating signal. When the bias unit receives the control signal, the bias unit dynamically modulates the bias signal according to the control signal, and hence the driving capability of the operational amplifier is dynamically modulated in an indirect manner.

Control circuit for operational amplifier and method thereof

A sample-and-hold device including first and second capacitors, first and second switches, amplifier and feedback network is provided. The amplifier includes first and second input stages, output stage and switchable bias current source. The first switch and the first capacitor are coupled in series between input signal and first voltage, and a common node is coupled to a first positive input terminal of the amplifier. The first switch is on during first period and off during second period. The second switch and the second capacitor are coupled in series between the input signal and second voltage, and a common node is coupled to a second positive input terminal of the amplifier. The second switch is on during second period and off during first period. The switchable bias current source biases the second input stage during first period, and switches to bias the first input stage during second period.

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Hsinchu, Taiwan

Yueh-Hsiu Liu