Patent application number | Description | Published |
20080204121 | Voltage generating circuit having charge pump and liquid crystal display using same - An exemplary voltage generating circuit ( | 08-28-2008 |
20080238902 | Display device with automatic power on-off switching - An exemplary display device ( | 10-02-2008 |
20080278471 | Liquid crystal display with common voltage compensation and driving method thereof - An exemplary liquid crystal display ( | 11-13-2008 |
20080284772 | Liquid crystal display with alternating current off control circuit - An exemplary liquid crystal display includes a power supply circuit, a scaler, and an alternating current off control circuit connected between the power supply circuit and the scaler. The alternating current off control circuit is configured to detect an operation state of the power supply circuit, and output a corresponding control signal to the scaler. | 11-20-2008 |
20080291154 | Backlight system with detection circuit and liquid crystal display device using same - An exemplary backlight system includes a power input circuit ( | 11-27-2008 |
20080297458 | Liquid crystal display using combination dot inversion driving method and driving method thereof - An exemplary liquid crystal display includes a data circuit, a memory, and a timing controller. The timing controller includes: a data analysis circuit configured for analyzing video signals stored in the memory and generating a corresponding control signal; and a polarity generating circuit configured for receiving the control signal and outputting a selected one of a first polarity control signal and a second polarity control signal to the data circuit according to the control signal. A related method for driving the liquid crystal display is also provided. | 12-04-2008 |
20080297524 | Liquid crystal display with symbol bit generating circuit and driving method thereof - An exemplary liquid crystal display includes a data circuit, a memory, and a timing controller. The data circuit includes a polarity generating circuit. The timing controller includes: a data analysis circuit configured for analyzing video signals stored in the memory and generates a corresponding symbol bit to each datum according to the category of each datum; and a symbol bit generating circuit configured for receiving the video data from the data analysis circuit, and keeping or altering the symbol bit of each datum according to the symbol bit of each datum outputted from the data analysis circuit. The data circuit is configured for receiving the video data having symbol bits from the timing controller. The polarity generating circuit is configured for generating a corresponding polarity control signal according to each of the symbol bits of the video data. A related method for driving the liquid crystal display is also provided. | 12-04-2008 |
20080303808 | Liquid crystal display with flicker reducing circuit and driving method thereof - An exemplary liquid crystal display includes an image signal analyzing circuit, a frame rate controlling circuit, an image signal processing circuit, and an output circuit. The image signal analyzing circuit is configured for judging whether images corresponding to input signals have flicker by analyzing pixel intensities and pixel voltage polarities of the input signals of each frame, and outputting controlling signals. The frame rate controlling circuit is configured for controlling a frame rate of output signals according to the controlling signals received from the image signal analyzing circuit. The image signal processing circuit is configured for inserting black image signals into input signals if the images corresponding to input signals have flicker. The output circuit is configured for outputting image signals according to signals transmitted from the frame rate controlling circuit and the image signal processing circuit. | 12-11-2008 |
20080303967 | Liquid crystal display capable of compensating common voltage signal thereof - An exemplary liquid crystal display ( | 12-11-2008 |
20080309247 | Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp - An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current voltage to a lamp. The PWM circuit is configured to provide a pulse control signal to the inverter. The frequency setting circuit is configured to regulate a frequency of the pulse control signal provided by the PWM circuit according to a temperature of the lamp. | 12-18-2008 |
20080309248 | Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp - An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current voltage to a lamp. The PWM circuit is configured to provide a pulse control signal to the inverter. The frequency setting circuit configured to regulate a frequency of the pulse control signal provided by the PWM circuit according to an environment temperature. | 12-18-2008 |
20080309306 | Power control circuit with coupling circuit for controlling output power sequence and liquid crystal display using same - An exemplary power control circuit ( | 12-18-2008 |
20080309604 | Liquid crystal display having polarity analyzing unit for determining polarities pixels thereof - A liquid crystal display ( | 12-18-2008 |
20080315796 | Backlight modulation circuit and method thereof - A backlight modulation circuit includes an illumination controlling signal generating circuit, an illumination control signal separating circuit, and an illumination modulation circuit. The illumination controlling signal generating circuit is configured for receiving an modulation signal and generating an illumination controlling signal according to the modulation signal. The illumination control signal separating circuit is configured for separating the illumination controlling signal into a first modulation signal and a second modulation signal. The illumination modulation circuit is configured for modulating illumination of a backlight module according to the first and second modulation signals. | 12-25-2008 |
20080316162 | Liquid crystal display and driving method thereof - An exemplary liquid crystal display ( | 12-25-2008 |
20090002303 | Liquid crystal display capable of compensating common voltage signal thereof - An exemplary liquid crystal display includes a liquid crystal panel having a plurality of pixel units arranged in rows, a scanning circuit configured to activate the pixel units row by row by outputting a plurality of corresponding scanning signals, a data circuit configured to provide data voltage signals to the activated pixel units, and a common voltage circuit. Each pixel unit includes a coupling member. When a row of pixel units is activated, all the coupling members in the row of pixel units cooperatively generate a coupling signal according to the data voltage signals applied to the activated row of pixel units, and superpose the coupling signal to the corresponding scanning signal so as to form a feedback signal. The common voltage circuit adjusts a reference voltage signal according to the feedback signal, and provides at least one common voltage signal to the pixel units. | 01-01-2009 |
20090002306 | Common voltage generating circuit having square wave generating unit and liquid crystal display using same - A common voltage generating circuit includes a square wave generating unit, a diode, a NOT gate, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, and an output terminal. The square wave generating unit includes an output terminal, which is coupled to the output terminal of the common voltage generating circuit via the first resistor, a positive terminal of the diode, a negative terminal of the diode, and the second resistor in series. The output terminal of the square wave generating unit is coupled to the negative terminal of the diode via the NOT gate and the first capacitor. The positive terminal of the diode is grounded via the second capacitor, and the output terminal of the common voltage generating circuit is grounded via the third capacitor. A duty ratio of the output square wave generating unit is capable of being modulated. | 01-01-2009 |
20090009648 | Display device having camera - An exemplary display device includes a monitor, a camera, a comparison circuit connected to the camera, and a control circuit connected to the control circuit and the monitor. The camera is capable of capturing a plurality of instantaneously captured images. The comparison circuit is capable of generating a positive result when one of the instantaneously captured images matches a pre-stored reference image, and generating a negative result when no instantaneously captured images match the reference image. The control circuit is configured for generating a first instruction to turn on the monitor according to the positive comparison result and to turn off the monitor according to the negative comparison result. | 01-08-2009 |
20090015544 | Backlight modulation circuit and method thereof - An exemplary backlight modulation circuit ( | 01-15-2009 |
20090039801 | Backlight control circuit - An exemplary backlight control circuit for changing a brightness of a light source includes a coarse adjusting circuit and a fine adjusting circuit. The coarse adjusting circuit is configured to coarsely adjust a DC voltage according to one received coarse adjusting signal. The fine adjusting circuit is configured to finely adjust the DC voltage according to one received fine adjusting signal. A change of the DC voltage generated by the coarse adjusting circuit is greater than another change of the DC voltage generated by the fine adjusting circuit. | 02-12-2009 |
20090040356 | Digital photo frame and method for controlling same - An exemplary digital photo frame includes an image memory configured for storing a display image, a display device configured for reading and displaying the display image, an infrared sensor configured for detecting infrared light, generating a first detecting signal when the infrared light is detected, generating a second detecting signal when the detected infrared light is no longer detectable, and a camera control circuit including a reference image therein. The camera control circuit generates an instant image and compares the instant image with the reference image when the first detecting signal is generated. The digital photo frame is configured to operate in a monitor mode or a display mode according to a comparing result when the infrared light is detected. | 02-12-2009 |
20090073150 | Liquid crystal display panel with image sensing system and image processing system using same - A liquid crystal display panel ( | 03-19-2009 |
20090085848 | Liquid crystal display with color sensor on substrate - An exemplary liquid crystal display includes a substrate, a light source, and a color feedback system. The light source includes light emitting diodes. The color feedback system includes either one color sensor or plural color sensors. In one example, a single color sensor is disposed on the substrate and samples the light at the substrate. The color feedback system adjusts the brightness of the light emitting diodes according to the sampling signals of the color sensor. | 04-02-2009 |
20090189882 | Data driver circuit, method for driving same, and LCD device using same - An exemplary data driving circuit includes a data register, a counter, and a comparator. The data register is configured for receiving serial gray level signals in turn, and outputting the plurality of gray level signals in parallel. The counter is configured for outputting counting signals. The comparator is configured for receiving the gray level signals and the counting signals, and outputting pulse voltage signals according to the gray level signals and the counting signals. A variety of duty ratios of the pulse voltage signals correspond to a variety of gray levels. | 07-30-2009 |
20090262103 | Method for adjusting common voltage of liquid crystal display device - A method for adjusting a common voltage of an LCD device includes providing an LCD device and a photodetector, obtaining variable parameters Ya, Yb and Yc, the variable parameters Ya, Yb and Yc respectively denoting flicker intensity of the LCD device when the common voltages are parameters Va, Vb and Vc, Vb exceed Va, and is less than Vc, when Yb exceeds Yc and is less than Ya, increasing the parameters Va, Vb and Vc respectively and repeating the two steps, when Yb exceeds Ya and is less than Yc, decreasing the parameters Va, Vb and Vc respectively and repeating the two steps, and when Yb is less than or equals Ya and is less than or equals Yc, setting an arbitrary value between Va and Vc as an optimum common voltage of the LCD device. | 10-22-2009 |
20090322799 | Liquid crystal display - A liquid crystal display (LCD) has a voltage generating circuit, a voltage regulating circuit, and a liquid crystal panel. The voltage generating circuit provides the liquid crystal panel with positive gray voltages and negative gray voltages. The voltage regulating circuit creates a compensating voltage lookup table recording compensated voltages according to the luminance, the positive gray voltage and the negative gray voltage of every gray level. The voltage regulating circuit regulates the positive gray voltage and the negative gray voltage using the compensated voltages recorded in the compensating voltage lookup table. | 12-31-2009 |
20100134536 | LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR COMPENSATING IMAGE THEREOF - An exemplary liquid crystal display (LCD) device includes a liquid crystal pane and a gamma correction module. The liquid crystal panel includes a plurality of pixels including normal pixels and abnormal pixels. For a same gray scale, the normal pixels are driven by a first gray scale signal and the abnormal pixels are driven by a second gray scale signal, in order that the brightness of an image displayed by the normal pixels and the brightness of the image displayed by the abnormal pixels are substantially identical. | 06-03-2010 |
20100231602 | BACKLIGHT ADJUSTING SYSTEM AND METHOD - A backlight adjusting system and method is adapted for adjusting a backlight brightness of a light emitting element for a display panel based on an ambient light around the display panel. The backlight adjusting system includes a first calculator, a processor and a driver. The first calculator calculates a target display brightness value of the display panel based on an actual ambient brightness value of the ambient light, a predetermined optimal ambient brightness value of the ambient light, and a predetermined optimal display brightness value of the display panel determined according to the predetermined optimal ambient brightness value. The processor obtains a target pulse duty value based on the target display brightness value. The driver generates a driving signal based on the target pulse duty value utilizing pulse width modulation techniques for driving the light emitting element so as to adjust the backlight brightness of the light emitting element. | 09-16-2010 |
20110084988 | LIQUID CRYSTAL DISPLAY AND DRIVING METHOD THEREOF - A liquid crystal display includes a liquid crystal panel, a gray scale correction circuit, a control circuit, and a data driver. The gray scale correction circuit provides a corrected red, green, blue (RGB) data set corresponding to a white image element. The control circuit receives an original RGB data set, and selectively outputs one of the original RGB data set and a corrected RGB data set according to a gray scale value of the of the original data set. The data driver provides a gray scale voltage to the liquid crystal panel according to the output RGB data set of the control circuit. | 04-14-2011 |
20110102478 | GAMMA ADJUSTMENT CIRCUIT AND METHOD AND DISPLAY DEVICE EMPLOYING SAME - A display device includes a gamma adjustment circuit employing a method for adjusting red, green, blue (R, G, B) data of an image signal. The gamma adjustment circuit provides at least one look up table (LUT) to store gamma correction values, determines whether at least two kinds of color data from the R, G, B data require adjustment, searches for gamma correction values corresponding to the at least two kinds of color data from the R, G, B data requiring adjustment in the at least one LUT, and outputs the R, G, B data and the gamma correction values corresponding to the at least two kinds of color data from the R, G, B data requiring adjustment. | 05-05-2011 |
20110109536 | LIQUID CRYSTAL DISPLAY AND METHOD FOR TESTING SAME - A liquid crystal display (LCD) includes an interface circuit configured to provide a test enable signal when the liquid crystal display is in a test mode; a timing control circuit configured to provide build in system test (BIST) data signals corresponding to at least one predetermined BIST image and a high voltage stress (HVS) start signal according to the test enable signal; a DC/DC converter configured to generate test-related voltages in response to the HVS starting signal; a data driver configured to provide a plurality of test gray voltage signals according to the BIST data signals and the test-related voltages; a scanning driver configured to provide a plurality of test scanning signals according to the test-related voltages; and a liquid crystal panel configured to receive the test gray voltage signals and test scanning signals. A method for testing an LCD is also provided. | 05-12-2011 |
20110292012 | METHOD FOR DRIVING LIQUID CRSYTAL DISPLAY AND LIQUID CRSYTAL DISPLAY USING SAME - An exemplary liquid crystal display (LCD) provides data lines, gate lines, and pixel units arranged as a matrix array. A method for driving the LCD includes a step of analyzing and determining polarities of one column of the pixel units as determining pixels, thereby defining a first polarity group and a second polarity group, and a step of sequentially applying corresponding data signals to a part of the whole pixel units that are arranged at same rows with the first polarity group in a part of a period of a frame. Corresponding data signals are sequentially applied to the other part of the whole pixel units that are arranged at same rows with the second polarity group in another part of a period of a frame. | 12-01-2011 |
20120038545 | LIQUID CRYSTAL DISPLAY WITH PERIODICAL CHANGED VOLTAGE DIFFERENCE BETWEEN DATA VOLTAGE AND COMMON VOLTAGE - An exemplary liquid crystal display includes a plurality of pixel units each including a pixel electrode for receiving data voltages and a common electrode for receiving a common voltage having a constant value. The data voltages applied to each pixel electrodes are equal a sum of a main data voltage having a square waveform and an auxiliary voltage that is periodically changed at intervals each formed by four continuous frames. An absolute value of the auxiliary voltage is less than a voltage difference between the main data voltage and the common voltage. A sum of the auxiliary voltage is zero in a minimum period. | 02-16-2012 |
20120068926 | DISPLAY DEVICE WITH REVERSIBLE DISPLAY AND DRIVING METHOD THEREOF - A display device includes a control circuit, a data driving circuit, a gate driving circuit, and a display panel comprising a display region. The control circuit determines a located orientation of the display panel, sets a display-mode state parameter according to the located orientation of the display panel, and outputs control signals to the data driving circuit and the gate driving circuit according to the display-mode state parameter. The data driving circuit outputs data signals of an image along a first shift direction according to corresponding control signals to the display region, and the gate driving circuit outputs gate signals along a second shift direction according to corresponding control signals to the display region. | 03-22-2012 |