LED BACKLIGHT DRIVER CIRCUIT, LCD DEVICE AND DRIVING METHOD
First Claim
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1. A light emitting diode (LED) backlight driver circuit, comprising:
- at least two lightbars which are independently driven; and
a monitoring module;
wherein an output end of each of the lightbars is coupled with a constant current driver integrated circuit (IC), the monitoring module controls the constant current driver integrated circuit (IC) and outputs a phase delay time to drive each lightbar and a current duty of each lightbar to the constant current driver IC, and the constant current driver IC drives the lightbar one by one according to the corresponding current duty in accordance with the phase delay time in sequence.
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Abstract
A light emitting diode (LED) backlight driver circuit includes at least two lightbars which are independently driven, an output end of each lightbar is coupled with a constant current driver integrated circuit (IC), and a monitoring module controlling the constant current driver IC. The monitoring module outputs a phase delay time to drive each lightbar and a current duty of each lightbar to the constant current driver IC, and the constant current driver IC drives the lightbars one by one according to the corresponding current duty in accordance with the phase delay time in sequence.
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Citations
17 Claims
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1. A light emitting diode (LED) backlight driver circuit, comprising:
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at least two lightbars which are independently driven; and a monitoring module; wherein an output end of each of the lightbars is coupled with a constant current driver integrated circuit (IC), the monitoring module controls the constant current driver integrated circuit (IC) and outputs a phase delay time to drive each lightbar and a current duty of each lightbar to the constant current driver IC, and the constant current driver IC drives the lightbar one by one according to the corresponding current duty in accordance with the phase delay time in sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A liquid crystal display (LCD) device, comprising:
a light emitting diode (LED) backlight driver circuit, wherein the LED backlight driver circuit comprises at least two lightbars which are independently driven, an output end of each lightbar is coupled with a constant current driver integrated circuit (IC), and a monitoring module controlling the constant current driver IC;
the monitoring module outputs a phase delay time to drive each lightbar and a current duty of each lightbar to the constant current driver IC, and the constant current driver IC drives the lightbar one by one according to the corresponding current duty in accordance with the phase delay time in sequence.- View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A light emitting diode (LED) backlight driving method, comprising:
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A. employing a monitoring module to generate a phase delay time between two lightbars and a current duty of each lightbar, and sending the phase delay time to drive each lightbar and the current duty of each lightbar to a constant current driver integrated circuit (IC); B. driving the lightbars one by one in accordance with the corresponding current duty in sequence according to the phase delay time by the constant current driver IC. - View Dependent Claims (16, 17)
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Specification