Abstract: An exemplary circuit board includes a plate body and a multilayer capacitor installed on a surface of the plate body. The multilayer capacitor includes a multilayer body and two outer electrodes located at the two opposite ends of the multilayer body. The multilayer body includes a plurality of ceramic layers and a plurality of internal electrodes alternately arranged. The two outer electrodes are connected to the plate body, and a stacking direction of the multilayer body is substantially parallel to the surface of the plate body.

Abstract: An exemplary liquid crystal display (200) has a liquid crystal panel (240); a gate driving circuit (230) configured for scanning the liquid crystal panel; a data driving circuit (220) configured for providing a plurality of gradation voltages to the liquid crystal panel; a photo sensor (241) configured for measuring a luminance of ambient light and generating a corresponding optical signal; a luminance control circuit (231) for receiving the optical signal from the photo sensor and transferring the optical signal to a measurement signal; a timing control circuit (210) configured for controlling the gate driving circuit and the data driving circuit; and a backlight circuit (270) for driving a light source to emit light beams for illuminating the liquid crystal panel, according to the measurement signal from the luminance control circuit.

Abstract: A light emitting diode driving circuit includes a light emitting diode, a temperature detector provided adjacent to the light emitting diode, a micro-processor and a constant current circuit. The constant current circuit is configured for generating a driving current to drive the light emitting diode. The micro-processor is configured for generating a plurality of pulse signals with an adjustable duty-cycle, and applying the pulse signals to the constant current circuit. The temperature detector is configured for detecting a present working temperature of the light emitting diode. The micro-processor is configured for adjusting the duty-cycle of the pulse signals according to the detected present working temperature of the light emitting diode. The constant current circuit adjusts the driving current according to the duty-cycle of the pulse signals.

Abstract: An exemplary liquid crystal panel control circuit (20) includes a direct current converting circuit (23). The direct current converting circuit includes a comparator (231), a reset circuit (232), and a DC-to-DC converting circuit (233) connected in series. The liquid crystal panel control circuit can return to an initial status from a protection status by the reset circuit.

Abstract: An exemplary driving circuit for a liquid crystal display (3) includes a power supply circuit (34), a backlight control circuit (356) and a counter (355). The power supply circuit provides voltages for the LCD. The backlight control circuit controls whether or not the voltages provided by the power supply circuit are transferred to a backlight module of the LCD. The counter is configured for counting a number of pulses received from an external circuit, when the number of pulses received reaches a predetermined threshold number, the counter provides a trigger signal to turn on the backlight control circuit, so that the voltages provided by the power supply are transferred to the backlight module.

Abstract: An exemplary power supply circuit (212) for a liquid crystal display (LCD) (2) includes a power source integrated circuit (IC) (214). The power source IC includes a voltage input (213) configured for receiving an external power source Vcc; a positive voltage output (215) configured for providing a first voltage; a negative voltage output (216) configured for providing a second voltage; a detecting circuit (2141) configured for generating a control signal when the LCD is turned off; and a switching circuit (2142) configured for receiving the control signal and electrically connecting the negative voltage output to the positive voltage output in order to increase a potential of the negative voltage output quickly.

Abstract: An exemplary liquid crystal display (200) has a liquid crystal panel (240); a gate driving circuit (230) configured for scanning the liquid crystal panel; a data driving circuit (220) configured for providing a plurality of gradation voltages to the liquid crystal panel; a photo sensor (241) configured for measuring a luminance of ambient light and generating a corresponding optical signal; a luminance control circuit (231) for receiving the optical signal from the photo sensor and transferring the optical signal to a measurement signal; a timing control circuit (210) configured for controlling the gate driving circuit and the data driving circuit; and a backlight circuit (270) for driving a light source to emit light beams for illuminating the liquid crystal panel, according to the measurement signal from the luminance control circuit.