摘要:
An illumination circuit includes a series circuit including light sources connected in series between a high voltage node and a low voltage node, and break-protecting circuits. Each break-protecting circuit includes a control circuit and a bypass circuit. The bypass circuit is connected in parallel to at least one corresponding light source of the light sources. The control circuit is connected to the series circuit and the bypass circuit to detect a voltage change of the series circuit and control the bypass circuit to be in a conduct state or a blocked state according to the voltage change
摘要:
An illumination circuit includes a series circuit including light sources connected in series between a high voltage node and a low voltage node, and break-protecting circuits. Each break-protecting circuit includes a control circuit and a bypass circuit. The bypass circuit is connected in parallel to at least one corresponding light source of the light sources. The control circuit is connected to the series circuit and the bypass circuit to detect a voltage change of the series circuit and control the bypass circuit to be in a conduct state or a blocked state according to the voltage change
摘要:
A liquid crystal display device (8) includes a TFT LCD panel (10), a power/inverter board (20) and an interface board (30). The LCD panel includes a liquid crystal display (12), a backlight module (14) and a driving circuit (16). The power/inverter board and the interface board are installed on one printed circuit board (40), and a certain distance is left therebetween. An inverter circuit of the power/inverter board is electrically connected with a CCFL (142) of the backlight module and is used to convert direct current (DC) into alternating current (AC) to light on the CCFL. The interface board is electrically connected with the driving circuit and is used to receive RGB (red, green and blue) signals, process and send said signals to the driving circuit. That the power/inverter board and the interface board are integrated on one printed circuit board reduces the cost of the liquid crystal display device and ensures stable work thereof.
摘要:
A liquid crystal display includes a control unit, an inverter connected to the control unit and a load connected to the inverter. The control unit provides a first control signal and a second control signal to the inverter according to a degree of brightness of an external image signals. The inverter adjusts luminous intensity of the load according to the first control signal and the second control signal. Also provided is a method for driving the liquid crystal display.