Au Optronics Corporation

Hung-Min Shih

Chun-Kuei Wen

Chung-Kuang Tsai

Yu-Ting Huang

Chun-Yu Chen

Tsung-Shiun Lee

Jie-Chuan Huang

Chih-Lin Liao

Kuan-Yu Chen

Yung-Tse Cheng

Chih-Wei Wang

Chia-Hung Sun

Hsien-Ying Chou

Li-Ru Lyu

Ya-Fang Chen

Meng-Sheng Chang

Shih-Chieh Kuo

Yi-Hao Wang

Huang-De Lin

Ming-Chi Hung

Wu-Min Chen

Chia-Wei Yu

Yung-Zhi Wu

Che-Yu Kuo

Zuei-Tien Chao

Tian-Hua Su

A display device includes an output circuit, a multiplexer, and a controller. The output circuit is configured to output a data voltage to an output pin. The multiplexer is configured to sequentially output the data voltage to different data lines according to a first multiplexing signal and a second multiplexing signal. The controller is configured to generate a control signal according to a variation of the data voltage to make the output pin output a default voltage level different from the data voltage corresponding to the data voltage.

Display device and driving circuit of display device

A display device and a shutdown control method thereof are provided. In the display device, a display panel has multiple pixels. A power supply circuit generates a power supply voltage, a gate high voltage and a common voltage according to an input power. A gate driver generates gate scan signals, and a source driver provides source driving signals to drive the display panel. A shutdown detection circuit detects a variation state of voltages values of the power supply voltage, the input voltage and the gate high voltage, and starts a shutdown process when the variation state is a decreasing state. In the shutdown process, the source driver makes the source driving signals to be equal to a reference ground voltage, the gate driver generates the gate scan signals with a high voltage pulse, and the power supply circuit makes the common voltage to be equal to the reference ground voltage.

Display device and shutdown control method thereof

A driving method for a display panel is provided, including the following steps: providing a first control signal, and providing a second control signal, where a voltage change of the second control signal compensates for a voltage change of the first control signal.

Driving method for display panel

A display apparatus and a driving method thereof are provided. A data driving chip provides a plurality of data voltages to a plurality of multiplexers through a plurality of output lines. When the display apparatus displays a pure gray pattern, the data voltages are alternately provided to a first data line group and a second data line group during a scan line driving period of each of the scan lines to make two adjacent pixels have different polarities. During a blank period, a plurality of data lines corresponding to a plurality of pixels having the same color and the same polarity on two adjacent scan lines are electrically coupled to each other through the data driving chip to share charges.

Display apparatus and driving method thereof

An integrated circuit includes a sensing output terminal, a driver, a first sensing input terminal, a second sensing input terminal and a sensor. The driver is used to transmit a sensing test signal through the sensing output terminal. The first sensing input terminal is coupled to the sensing output terminal through a first external circuit for receiving the sensing test signal. The second sensing input terminal is coupled to the sensing output terminal through a second external circuit for receiving the sensing test signal. The sensor is used to compare the sensing test signals received by the first sensing input terminal and the second sensing input terminal with a clock signal respectively to generate a first comparison result and a second comparison result.

Method for determining a condition of pin connection of the integrated circuit and integrated circuit thereof

A charge-sharing controlling method and a display panel are disclosed. The charge-sharing controlling method is suitable for the display panel including plural sub-pixels. The charge-sharing controlling method includes following steps: determining whether the display panel is displaying a primary color screen; if the display panel is displaying a primary color screen, prolonging an activated time of a charge-sharing circuit, which is coupled between any two of the sub-pixels displaying the same color, adjacent to each other and having opposite polarities.

Charge-sharing controlling method and display panel

A clock generator circuit of a liquid display panel includes a charge sharing switch unit, a first capacitor, a first switch, a second switch, a third switch and a fourth switch. The charge sharing switch unit is configured to receive control signals and accordingly output a first-polarity voltage to the first capacitor. The clock generator circuit is configured to turn on the first switch, the second switch, the third switch and the fourth switch according to a specific sequence thereby outputting a clock signal. An operation method for the aforementioned clock generator circuit is also provided.

Clock generator circuit of liquid crystal display device and operation method thereof

A driving device is configured for driving a display panel and includes a data driver, a plurality of switches, and an image determiner. The switch is electrically coupled between data lines of a first data line group. The data driver is configured to output data signals to the data lines of the first data line group. The data signals transferred by the data lines of the first data line group include a plurality of pulse transitions while the display panel displays an image. The image determiner is configured to determine the image displayed by the display panel and output a driving signal based on a determined result for activating a corresponding switch such that the data lines of the first data line group can perform charge sharing therebetween. Furthermore, a method for driving a display panel is disclosed herein.

Driving device and display device and method for driving display panel

A multi-frame overdriving circuit for use in a liquid crystal display including a counting unit and a multi-frame overdriving unit is provided. The counting unit counts a number m of frame periods for which a pixel data corresponding to a pixel keeps a first gray value, wherein m is a positive integer. When the pixel data changes to a second gray value from the first gray value in a first frame period, the multi-frame overdriving unit respectively outputs y multi-frame overdriving pixel data corresponding to the pixel within successive y frame periods starting from the first frame period. The y multi-frame overdriving pixel data are related to the first gray value, the second gray value and the number m of frame periods, wherein y is a positive integer.

Multi-frame overdriving circuit and method and overdriving unit of liquid crystal display

A gamma voltage generator can control brightness of a first color pixel unit and a second color pixel unit. A first potential divider is coupled between a first node and a second node for generating a first main gamma voltage. At least one second potential divider is coupled between the second node and a third node for generating a first sub-gamma voltage and a second sub-gamma voltage. The brightness of the first color pixel unit is controlled by the first main gamma voltage and the first sub-gamma voltage. The brightness of the second color pixel unit is controlled by the first main gamma voltage and the second sub-gamma voltage.

Gamma voltage generator and control method thereof and liquid crystal display device utilizing the same

A matrix sensing apparatus with architecture having reduced quantity of required sensing lines is disclosed. The matrix sensing apparatus includes a plurality of driving lines, a plurality of sensing lines and a matrix sensing region. The matrix sensing region includes a plurality of sensing areas. Each sensing area includes a first transistor, a second transistor, and a sensing unit for generating a sensing signal. The first transistor is coupled to the sensing unit and a corresponding sensing line. The second transistor is coupled to the first transistor, a first corresponding driving line and a second corresponding driving line. The first transistor together with the second transistor functions to control the signal connection between the sensing unit and the corresponding sensing line based on the driving signals of the first and second corresponding driving lines.

Matrix sensing apparatus

A light module includes a plurality of light sources for generating light, a power controller, a bridge converter, a first piezoelectric transformer, a second piezoelectric transformer, a resonance balance circuit, and a protection circuit. The power controller is used for generating a power driving signal based on a control signal. The bridge converter is used for generating a supply voltage signal based on the power driving signal. The first piezoelectric transformer is used for transforming the supply voltage signal into a first driving voltage signal to a first end of each of the plurality of lamps. The second piezoelectric transformer is used for transforming the supply voltage signal into a second driving voltage signal to a second end of each of the plurality of lamps. The resonance balance circuit includes a primary winding coupled to the first and the second piezoelectric transformers, and a secondary winding for outputting a feedback signal in response to a current flowing through the primary winding. The protection circuit is coupled to the secondary winding of the resonance balance circuit, and is used for generating the control signal based on the feedback signal.

Piezoelectric transformer module for generating balance resonance driving current and related light module

A circuit and method of reducing noises for improving quality of display in a liquid crystal display (LCD) system. The LCD system includes an LCD panel and at least one lamp. In operation the LCD system is supplied with a vertical synchronization signal and a horizontal synchronization signal. In one embodiment, the method comprises the steps of determining a lamp driving frequency for the at least one lamp responsive to the horizontal synchronization signal, and generating a lamp driving signal with the lamp driving frequency to be received by the at least one lamp for producing light, wherein the following formulae (1) and (2) are satisfied: where His the frequency of the horizontal synchronization signal in unit of (Hz); fis the lamp driving frequency for the lamp driving signal in unit of (Hz); m, n=1, 2, 3, . . . , an integer; and &#x3b4; indicates the permissible error of the lamp driving frequency.

Circuit and method for improving image quality of a liquid crystal display

A backlight system for use in an LCD display with a driver providing current sink control includes an LED array module, a current feedback circuit, and a current compensation circuit. The LED array module has N columns of LEDs and each LED column has M LEDs connected in serial, wherein the current feedback circuit includes N current feedback units and the current compensation circuit includes N current compensation units, both of the current feedback circuit and the current compensation circuit being electrically coupled to the LED array module. When the backlight system is in operation, a current passes through an LED column, a current feedback unit, and a current compensation unit to generate an output voltage that is used for comparison with a predetermined DC voltage, and the current is compensated based on the results of the comparison.

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Hsin-Chu, Taiwan

Hung-Min Shih