Abstract: An onscreen display (OSD) system for a display device includes an OSD module including a microprocessor and a memory. The memory stores instructions about adjustment of a display characteristic and the microprocessor reads the instructions and generates an OSD menu including the instructions. An operation method for the system is also provided.

Abstract: An exemplary external electrode fluorescent lamp includes a fluorescent tube having two electrodes fixed at two ends thereof, and two inner caps respectively holding the electrodes. Each inner cap includes an electrode receiving portion configured for receiving the electrode, a conductive layer provided at inner surfaces of the electrode receiving portion, a lead receiving portion integrally formed with the electrode receiving portion, and a conductive lead received in the lead receiving portion. The conductive layer contacts the conductive layer. A backlight module employing the external electrode fluorescent lamp is also provided.

Abstract: An exemplary backlight control circuit includes a load (250), an inverter circuit (230), a pulse width modulation integrated circuit (PWM IC) (210), a protecting circuit (270), and a feedback circuit (240). The load (250) includes two backlight lamps (251, 252) with first terminals (241). The PWM IC with a protecting output (215) is connected to the load via the inverter circuit. The protecting circuit haves a reference voltage. The first feedback circuit is capable of outputting a voltage to the protecting circuit corresponding to the voltage detected from the first terminals. The protecting circuit is configured to control the PWM IC to stop outputting a backlight adjusting signal to the inverter circuit such that the inverter circuit stops driving the load when the output voltage is higher than the reference voltage of the protecting circuit.

Abstract: An exemplary backlight control circuit includes a lamp, a transformer, and a lamp driving circuit. The lamp driving circuit includes a duty ratio determining unit, a duty ratio adjusting unit, and an output unit. The output unit is configured for outputting two pulse signals having a same duty ratio and opposite phases to the transformer. The transformer is configured for generating an alternating voltage for driving the lamp. The duty ratio determining unit is configured for determining if the duty ratio of the pulse signals is in a predetermined duty ratio range. The duty ratio adjusting unit is configured for adjusting the duty ratio of the pulse signals in order to adjust a brightness of the lamp.

Abstract: An exemplary backlight control circuit includes a transformer, a control circuit, a lamp. The control circuit and the transformer form an inverter circuit to providing an alternating current (AC) voltage for driving the lamp. When the backlight control circuit works in a startup mode, the backlight control circuit defines a first current path including the lamp and the first current path forms a first resonant circuit. When the backlight control circuit works in an operation mode, the backlight control circuit defines a second current path including the lamp and the second current path forms a second resonant circuit. The first and second resonant circuits have different resonant frequencies from each other.

Abstract: A backlight driving circuit includes a brightness controller, a timing controller, and a logic calculation circuit. The brightness controller is configured to provide a first control signal to the logic calculation circuit, the timing controller is configured to provide a second control signal to the logic calculation circuit, and the logic calculation circuit is configured to select the first or second control signal to adjust a brightness of a lamp.

Abstract: A liquid crystal display includes one or more data drivers for outputting data signals, a processor, and at least two control units, each of which controls polarities of data signals of selected data drivers. The processor processes the data signals of the data drivers, and sends control signals to the control units. The control units control polarities of selected data signals to balance summing positive polarities and summing negative polarities of the data signals. A related method for driving the liquid crystal display is also provided.

Abstract: An exemplary backlight module includes lamps (21), a power supply circuit (20), a detecting circuit (22), and a direct current voltage compensation circuit (23). The power supply circuit is configured for supplying a driving voltage to the lamps. The first detecting circuit is configured for detecting a direct current voltage component of the driving voltage at one end of one of the lamps. The first direct current voltage compensation circuit is configured for providing a compensation direct current voltage to an opposite end of all the lamps according to the detected direct current voltage component.

Abstract: An exemplary liquid crystal display (20) includes a liquid crystal panel (27) having at least one pixel block, a source driver (26) configured to drive the at least one pixel block, a backlight module having at least one light source block, a backlight driver (23) configured to drive the light source blocks, and a data processor (21) configured to provide gray level values and provide backlight control signals. The data processor receives display signals, converts the display signals to a plurality of primary gray level values, and averages the primary gray level values to obtain an average gray level value. The source driver and the backlight driver respectively generate data voltages and driving voltages to drive the at least one pixel block and the at least one pixel block according to the average gray level value. A related method for driving the liquid crystal display is also provided.

Abstract: An exemplary liquid crystal display device includes a scanning voltage adjusting circuit (250), a scaler (220), and a liquid crystal display panel (200). The scanning voltage adjusting circuit is configured for detecting an environment temperature and generating a scanning voltage adjusting signal corresponding to the environment temperature. The scaler is capable of receiving the scanning voltage adjusting signal and generating a scanning voltage according to the scanning voltage adjusting signal. The liquid crystal display (LCD) panel is configured to be driven by the scanning voltage and thereby display images.

Abstract: An exemplary liquid crystal display includes parallel data lines, a data driver configured for driving the data lines, a coupling line crossing the data lines, a common electrode layer, and a common voltage generator configured for applying common voltages to the common electrode layer. The common voltage generator is connected to the coupling line. When data driver applies a plurality of data signals to the data lines, the data signals generate an influence signal at the coupling line. The common voltage generator adjusts common voltages applied to the common electrode layer according to the influence signal. A related method for driving the liquid crystal display is also provided.

Abstract: An exemplary liquid crystal display (20) includes gate lines (21), a gate driver (25) configured for receiving input signals, a comparator (28), a reference voltage generator (29) configured for outputting a reference voltage to the comparator, and a timing control circuit (27). The gate driver is further configured for driving the gate lines. Falling edges of waveforms of the input pulse signals drop gradually from a first voltage to a second voltage. The comparator is configured for receiving the input pulse signals and the reference voltage, and outputting a control signal according to the input pulse signals and the reference voltage. The timing control circuit is configured for receiving the control signal from the comparator, and, according to the control signal, outputting output enable signals to the gate driver to adjust gate signals applied to the gate lines.

Abstract: An exemplary backlight module (20) includes a plurality of light units (22) disposed in parallel. Each light unit includes two opposite electrodes (221, 222). Two alternating current (AC) voltages having 180° phase difference and a same frequency are respectively applied to the two opposite electrodes, and two AC voltages respectively applied to the two electrodes, at a same side, of two adjacent light units, have 180° phase difference and a same frequency.

Abstract: An exemplary liquid crystal display (300) includes a liquid crystal panel (301) having a plurality of pixel units (340), a common voltage generating circuit (304), and a common voltage compensating circuit (306). The common voltage compensating circuit receives display signals, and compares odd-column display signals of said display signals with even-column display signals of said display signals, so as to provide a compensating signal. The common voltage generating circuit generates a common voltage signal according to the compensating signal, and outputs the common voltage signal to the pixel units. A related method for driving a liquid crystal display is also provided.

Abstract: An exemplary liquid crystal panel (20) includes a plurality of scanning lines (23) that are parallel to each other, a plurality of data lines (24) that are parallel to each other and orthogonal to the scanning lines, at least one first data driving (221) circuit configured for proving a plurality of gray scale voltages to part of immediately adjacent data lines, and at least one second data driving circuit (222) configured for providing a plurality of gray scale voltages to the other part of the data lines. The scanning lines and date lines cooperatively define a plurality of sub-pixels (26) formed in a matrix. The polarities of the sub-pixels in each row that receive the first gray scale voltages being correspondingly opposite to the polarities of the sub-pixels in the same row that receive the second gray scale voltages.

Abstract: An exemplary method for driving a liquid crystal display (200) includes: (a) providing a liquid crystal panel (20) including a plurality of pixels (205) arranged in a matrix to define sub-matrices of pixels, each sub-matrix including a plurality of pixel blocks; (b) providing a predetermined polarity pattern for each pixel block for a first frame period, such that each pixel has a predetermined polarity; (c) reversing the polarity of one of the pixels of each pixel block of each sub-matrix in each successive frame period, wherein a different pixel of each pixel block has its polarity reversed with each succeeding frame period, such that in one cycle of frame periods the polarities of all the pixels in each pixel block are reversed once only, and after each pixel block has its polarity reversed, the polarity of the pixel block is maintained for at least four successive frames periods.

Abstract: A liquid crystal display (1) includes a liquid crystal panel (12) including a number of thin film transistors (123), a timing control circuit (16), a common voltage generating circuit (14) and a gamma circuit (13). The timing control circuit is configured for generating timing signals. The common voltage generating circuit is configured for generating a common voltage. The gamma circuit is configured for generating gray-scale voltages. When the liquid crystal panel is powered on, the common voltage is applied to the liquid crystal panel and reaches a predetermined value before the gray-scale voltages are applied to the liquid crystal panel and comes to predetermined values. And when liquid crystal panel is powered off the common voltage and the gray-scale voltages drops to 0V simultaneously by control of the common voltage generating circuit and the gamma circuit with the thin film transistors switched on.