Abstract: The major characteristics of the present invention lies in that, on one hand, conventional driving or overdriving techniques that do not add significant cost to the display device are used for scanning while, on the other hand, the direct-lit, LED-based backlight is turned off during the pixels' transient period where their grey levels gradually approach or overshoot above the target grey levels so that the residuals of the dynamic images during the transient period are not manifested.

Abstract: A system for adjusting color image quality includes converting color video signal sources into component video signals including a luminance signal and chrominance signals. A signal axis rotation circuit performs coordination transformation on the chrominance signals in accordance with a hue calibration parameter; and a multiplier multiplies the coordinate-transformed chrominance signals with a chroma calibration parameter to obtain output chrominance signals. The output chrominance signals and the luminance signal together form a component chrominance signal, which is applied to and output by a chrominance signal inverse conversion unit.

Abstract: An overdrive method for anti-double edge of LCD uses: a register unit, a signal processing module including a selection unit and a driving-voltage lookup table (ADE LUT) and a plurality of multiplex processing units to effectively save the resources of hardware and to eliminate the double edge phenomenon generated during overdrive liquid-crystal image developing by selecting among present frame driving-voltage values, overdrive voltage values and actually achieved voltage values input from the driving-voltage lookup table and by outputting driving-voltage values suitable for respective situations according to selection signals of a selection unit by the multiplex processing units. The method is added with a complementary table and an operation unit to increase its scope of application, to eliminate double edge generated by different response speeds; and thereby is suitable for various liquid crystal displays.

Abstract: A display overdrive method applicable to LCD picture process involves having image data containing gray scale presentation range inputted into the display; a corresponding gray scale range being set up based on the time of a frame from the former range to be present on the display; each gray scale code in the former range being corresponded to the that of the latter to drive the display; gamma voltage corresponding to gray scale in the former range being adjusted relatively to those in the latter range for reducing response time of pixels of the display comparatively to the frame time.

Abstract: A dynamic control method for controlling backlight module of liquid crystal display (LCD) comprises steps of: receiving a frame data which is transferred to the LCD and consists a plurality of raw grayscale level; processing a statistical analysis for distribution of the plurality of raw grayscale level; and transferring a plurality of corrected grayscale level which is resulted from the statistical analysis corresponding to the raw grayscale level to the backlight control unit and a data modification simultaneously, wherein the backlight control unit uses the plurality of corrected grayscale level to modify brightness of backlight module and the data modification uses the plurality of corrected grayscale level to compare with the plurality of raw grayscale level for accurate display performance, so that the electrical power consumption is reduced and image quality is enhanced.

Abstract: A DC-DC converter includes a temperature compensation circuit arranged between a feedback differential amplification circuit and an output voltage detection circuit to compensate the variation of the voltage level of the DC output voltage of the converter caused by ambient temperature changes. The temperature compensation circuit includes a temperature detection circuit that detects the ambient temperature and, in response thereto, generates a temperature signal; and a current source circuit that is connected between a feedback signal input terminal of the feedback differential amplification circuit and the output voltage detection circuit. The current source circuit, based on the temperature signal, generates an electrical current and a compensation voltage proportional to the electrical current. The compensation voltage is applied to the DC output voltage to thereby regulate the voltage level of the DC output voltage.

Abstract: An overdrive accuracy adjustment device and method for use in a liquid crystal display panel is presented. According to a current grayscale value of a pixel in an awaiting to be displayed image and a previous grayscale value of the corresponding pixel in an already-displayed image, the corresponding overdrive grayscale value is found from a look-up table. In order to more efficiently use the limited storage capacity of the look-up table as well as improve the accuracy of the overdrive, in accordance with the physical characteristics of the liquid crystal display panel in particular (in particular to the grayscale values which often require the overdrive), the gap size between the current grayscale values and/or the gap size between the previous grayscale values may be adjusted in the look-up table, without having to increase the quantity of the overdrive grayscale values stored in the look-up table.

Abstract: A double-frame-rate method for reducing the time lapse of a LCD pixel between its two consecutive scans within a frame is provided. The method horizontally partitions the scan lines into (k) non-overlapping regions, each containing m1, m2, . . . , mk scan lines. The method then scans each of the regions twice before continuing to the next region and, as such, completes two passes of scanning of the entire frame. For a pixel in a region (j), the time lapse between the pixel's two consecutive scans during the frame's frame time is (mj/n) of the time lapse of conventional double-frame-rate methods.

Abstract: A method to drive a display with grid array pixels is comprised of writing image data containing a range of grayscale code into multiple pixels; at least a time of a pixel row being divided into frame time and black picture time; each code in the grayscale range being mapped to that in and adjusted range to drive the display without changing gamma voltage or with increased gamma voltage of the greatest grayscale code to present the luminance desired; pixel response time being shorter than frame time; and black picture data being written into the pixel row during the black picture time.

Abstract: The method increases the output frame rate to p/q (p, q are both natural numbers and p>q) times of the input frame rate. In a period of time equal to the least common multiple of the input and output frame times, q input frames are output and (p?q) transient frames are generated and inserted at appropriate places before or after the q input frames in the output frame sequence so as to enhance the dynamic display effect of the display device.

Abstract: A constant current regulator includes a current sensing circuit loop connected to a switch unit of the constant current regulator to detect a current flowing through the switch unit and to generate a detection current that is in proportion to the current flowing through the switch unit. The detection current flows through a detection resistor to induce a detection voltage. A differential amplifier bases on a set voltage and the received detection voltage to generate an error voltage to a pulse width modulation controller, which in turn causes a gate driver circuit to control the switching operation of the switch unit thereby supplying a constant current to a load connected to an output voltage of the regulator.

Abstract: A driving device for quickly changing the gray level of the liquid crystal display (LCD and its driving method are disclosed. The driving device includes a group of thin film transistors with matrix array, a plurality of gate lines and a plurality of data lines. The object of quickly changing the gray level of the LCD can be accomplished by the different arrangement of the gate lines and the data lines and the different connection of the thin film transistors with the gate lines and the data lines. The driving method includes: two gate lines in the LCD are simultaneously or synchronously turned on according to in the bright, period or in the black, period, the voltage for displaying the present frame interval data or the voltage for displaying black image is given to the thin film transistors connected with the gate lines, and scanning continues in turn.

Abstract: A dynamic control method for controlling backlight module of liquid crystal display (LCD) comprises steps of: receiving a frame data which is transferred to the LCD and consists a plurality of raw grayscale level; processing a statistical analysis for distribution of the plurality of raw grayscale level; and transferring a plurality of corrected grayscale level which is resulted from the statistical analysis corresponding to the raw grayscale level to the backlight control unit and a data modification simultaneously, wherein the backlight control unit uses the plurality of corrected grayscale level to modify brightness of backlight module and the data modification uses the plurality of corrected grayscale level to compare with the plurality of raw grayscale level for accurate display performance, so that the electrical power consumption is reduced and image quality is enhanced.

Abstract: A method and device for providing electrostatic discharge (ESD) protection are disclosed. The method uses the gate-controlled conductivity of field n-channel metal-oxide-semiconductor field effect transistor (field NMOSFET), wherein considerable ESD current can be conducted away when any ESD event beyond range of operation voltage, unlike PMOS ESD protection which is to be turned on at negative voltage. Instead of the traditional two-stage ESD protection (using one ESD protection between open drain output and VSS and the other ESD protection between VDD and VSS), the device can be directly used between open drain output and power source VDD for the wide range of operation voltage. Unlike the floating-gate field NMOS using punch through current for ESD protection, a controllable triggered voltage by changing the gate threshold voltage supports the device to be a robust ESD protection.

Abstract: A driving system used for light emitting diodes relating to a controllable driver which can detect the voltage desire from application and adjust driving voltage (Vapp1-Vapp2) automatically in order to reach a steady driving current. Additionally, users can adjust the setting of driving current and the output value of DC voltage source for application with different voltage and current requirements through a control interface. The over-temperature and over-current protections (e.g. cutting off driving current or setting the upper limit of driving current) are also included in the system for prevention of possible harms. In the system, a driving system is also disclosed for integration of all the mentioned functions but no need of massive space and can be used in LED lighting system or LED backlight system for constant power emitting.

Abstract: The present invention discloses a method for driving a liquid crystal display device for enhancing a picture quality. More specifically, a method for driving liquid crystal display in a multi-frame polarity inversion manner is disclosed. Based on standard liquid crystal display structure, hardware and specification, the method improves frame rate by increasing input rate of grayscale level with a better brightness performance and fewer loss of grayscale.

Abstract: A method for color correction is provided. In this method, a plurality of groups of gray levels and luminance of light source of display device are respectively selected by color measurement system. The selected data of each color light are respectively calculated to obtain fitting functions which can fit the gray level data of each interval. The fitting luminance of the gray levels in interval is obtained by the fitting function and formed into a lookup table. Then in order to correspond a gamma curve of normalized gray data of image to a predetermined target curve, the two gamma curves are first taken to logarithmic calculation and the modified gray signals are obtained from the lookup table, then the modified gray signals are transmitted out for providing the display device to express the gray distribution state. The method for color correction is applicable to various display devices, especially liquid crystal display device.

Abstract: A method of increasing image gray-scale response speed comprising the following steps: to divide plural driven gate lines of an LCD into plural areas; to divide the frame interval time relative to the plural areas into plural sub-intervals, and to sequentially activate each first gate line of these areas during a time period of synchronized signals, then to sequentially activate the next gate lines of these areas, the operation is repeated; to apply an advance voltage to at least a gate line to overdrive frames, and to apply an image data voltage to at least a gate line; to repeat the above steps until the end of the entire frame interval time and to enter the next frame interval. The LCD can be fast driven by dividing of time and space. The method suits for treatment of frames of displays of various LCD's and organic light emitting diodes (OLED's).

Abstract: A constant power DC light emitting diode (LED) driving system and method is disclosed. The system comprises a plurality of LED, a DC voltage source for LED current generation, and a constant-voltage and constant-current regulator for constant luminance control. A method and a redundancy circuit thereof for LED current detouring and LED luminance maintenance are also disclosed.

Abstract: Method and device for simulating an impulse-type CRT display is provided, in which the device has first and second input control lines, first and second input data lines, first and second capacitors, a driving voltage output line, and a first transistor having a gate connected to the first input control line, a source connected to the first input data line, and a drain connected to the driving voltage output line, the first capacitor and the drain of a second transistor that is similarly connected to various elements as in the first transistor. The two capacitors are connected to ground respectively, and the driving voltage output line is to output the simulation driving voltage to the pixels of an LCD panel. The first and second input control lines are connected to a first and second gate driver, and the first and second data lines are connected to a data driver respectively.