Backlight Drive Circuit, Blacklight Driving Method, And Display Device
AssigneeQingdao Hisense Electronics Co., Ltd.
InventorsYuxin ZHANG, Junxiong ZHANG, Qiang DU
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Abstract
Disclosed are a backlight drive circuit, a backlight driving method, and a display device. The backlight drive circuit according to some embodiments of the disclosure includes: a plurality of LED strips configured to be powered in a time-division mode; a discharging circuit connected with anodes of the plurality of LED strips; and a first switch element connected with cathodes of the plurality of LED strips, wherein the first switch element has a first terminal connected with the cathodes of the plurality of LED strips, and a second terminal grounded, and the first switch element is configured to be turned on when any one of the plurality of LED strips is powered on.
Claims20
A backlight drive circuit, comprising:
- a plurality of LED strips configured to be powered in a time-division mode;
- a discharging circuit connected with anodes of the plurality of LED strips;
- and a first switch element connected with cathodes of the plurality of LED strips, wherein the first switch element has a first terminal connected with the cathodes of the plurality of LED strips, and a second terminal grounded, and the first switch element is configured to be turned on when any one of the plurality of LED strips is powered on.
A backlight drive circuit, comprising:
- a backlight source comprising at least a first LED strip and a second LED strip;
- a power supply circuit configured to power the backlight source;
- a first switch element arranged between the power supply circuit and the backlight source, wherein the first switch element is configured to control the power supply circuit to power the first LED strip and the second LED strip in a time-division mode;
- a second switch element, wherein a first terminal of the second switch element is connected with a cathode of the first LED strip and a cathode of the second LED strip, and a second terminal of the second switch element is grounded, wherein the second switch element is configured to be turned on in response to the power supply circuit powering the first LED strip or the second LED strip;
- and
- a discharging circuit connected with an anode of the first LED strip.
A backlight driving method, applicable to a display device comprising a backlight source and a power supply circuit, wherein the backlight driving method comprises:
- in a first power supply period of time, controlling the power supply circuit to power a first LED strip in the backlight source;
- after the first power supply period of time elapses, disconnecting the first LED strip from the power supply circuit, and controlling a discharging circuit to discharge the first LED strip in a preset period of time;
- and
- after the preset period of time elapses, controlling the power supply circuit to power a second LED strip in the backlight source.
Dependencies are inferred from the claim text.