Light emitting diode and display device using the same
First Claim
1. An LED driver, for driving a first set of LEDs and a second set of LEDs, comprising:
- an inductor, having a first terminal, for receiving an input voltage;
a main switch, having a first terminal coupled to a second terminal of the inductor and a second terminal coupled to a common level, for adjusting a current of the inductor;
a first switch, having a first terminal coupled to the first set of LEDs and a second terminal coupled to the second terminal of the inductor;
a second switch, having a first terminal coupled to the second set of LEDs and a second terminal coupled to the second terminal of the inductor; and
a controller, coupled to controlling terminals of the main switch, the first switch and the second switch respectively, for controlling conducting statuses thereof.
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Accused Products
Abstract
An LED driver and a display device using the same are disclosed. The LED driver is adapted for driving a first set of LEDs and a second set of LEDs. The LED driver includes an inductor, a main switch, a first switch, a second switch, and a controller. The inductor has a first terminal receiving an input voltage. The main switch is coupled between a second terminal of the inductor and a common level for adjusting a current flowing therethrough. The first switch is coupled between the first set of LEDs and the second terminal of the inductor. The second switch is coupled between the second LEDs and the second terminal of the inductor. The controller is coupled to controlling terminals of the main switch, the first switch, and the second switch respectively for controlling conducting statuses of the main switch, the first switch, and the second switch respectively.
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Citations
14 Claims
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1. An LED driver, for driving a first set of LEDs and a second set of LEDs, comprising:
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an inductor, having a first terminal, for receiving an input voltage; a main switch, having a first terminal coupled to a second terminal of the inductor and a second terminal coupled to a common level, for adjusting a current of the inductor; a first switch, having a first terminal coupled to the first set of LEDs and a second terminal coupled to the second terminal of the inductor; a second switch, having a first terminal coupled to the second set of LEDs and a second terminal coupled to the second terminal of the inductor; and a controller, coupled to controlling terminals of the main switch, the first switch and the second switch respectively, for controlling conducting statuses thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display device, comprising:
a backlight module, comprising; a first set of LEDs; a second set of LEDs; an inductor, having a first terminal receiving an input voltage; a main switch, having a first terminal coupled to a second terminal of the inductor, and a second terminal coupled to a common level, for adjusting a current of the inductor; a first switch, having a first terminal coupled to the first set of LEDs, and a second terminal coupled to the second terminal of the inductor; a second switch, having a first terminal coupled to the second set of LEDs, and a second terminal coupled to the second terminal of the inductor; and a controller, coupled to controlling terminals of the main switch, the first switch and the second switch, respectively, for controlling conducting statuses thereof. - View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification