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LED (light-emitting diode) driving circuit, method and LED lamp bar

An LED driver and circuit technology, which is applied in the layout of electric lamp circuits, electric light sources, lighting devices, etc., can solve the problems of increased insulation requirements for light bars, and the safety problems cannot be well guaranteed.

Inactive Publication Date: 2013-01-16
SHENZHEN TCL NEW-TECH CO LTD
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  • Abstract
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Problems solved by technology

[0003] In the prior art, a light bar (LIGHT BAR) is generally composed of several LED lights connected in series, such as figure 1 Shown is the driving circuit diagram of the side-type LED backlight method, figure 1 The method shown is simple in structure and easy to implement. However, it is driven by direct current. When the number of LED lights is relatively large, the voltage required for LED backlight driving is very high, and the insulation requirements for the light strips are also correspondingly increased. less than good protection

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  • LED (light-emitting diode) driving circuit, method and LED lamp bar
  • LED (light-emitting diode) driving circuit, method and LED lamp bar
  • LED (light-emitting diode) driving circuit, method and LED lamp bar

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[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The invention provides an LED driving circuit.

[0029] refer to figure 2 , figure 2 It is a circuit structure diagram of an embodiment of the LED driving circuit of the present invention.

[0030] In this embodiment, the LED driving circuit includes a light emitting module 20 and a first AC input terminal 10 and a second AC input terminal 30 respectively disposed at two ends of the light emitting module 20 . The light emitting module 20 includes a first LED group 201 and a second LED group 202 arranged in parallel in two ways, wherein the first LED group 201 includes several LEDs connected in series and with the same conduction direction, and the second L...

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Abstract

The invention discloses a LED (light-emitting diode) driving circuit which comprises a light emitting module and an AC (alternate current) first input end and an AC second input end which are respectively arranged at both ends of the light emitting module, wherein the light emitting module comprises a first LED group and a second LED group which are connected in parallel; and both the first LED group and the second LED group comprise a plurality of LEDs which are correspondingly connected in series and have ethe same conduction directions. According to the invention, AC square signals with equal sizes and opposite phases are input into the light emitting module by the AC first input end and the AC second input end, so that the LEDs of a LED lamp bar are alternately lightened, the LED backlight is uniform, the LED brightness is strengthened, the display effect is better, the driving voltage is also reduced, the electric energy is saved and the use safety is ensured. Moreover, the LED driving circuit has the advantages of simple and reasonable circuit structure and easiness for implementing. The invention also further discloses a LED driving method and the LED lamp bar.

Description

technical field [0001] The invention relates to the technical field of LED driving, in particular to an LED driving circuit, a method and an LED light bar. Background technique [0002] With the continuous development and updating of backlight technology, CRT (Cathode Ray Tube, cathode ray tube) color TV is rapidly being replaced by LCD (Liquid Crystal Display, liquid crystal display) TV. Since the LCD screen of an LCD TV doesn't emit light itself, it needs a backlight. Backlight technology has gone through the process from CCFL (Cold Cathode Fluorescent Lamp, Cold Cathode Fluorescent Lamp) backlight to LED (Light Emitting Diode, Light Emitting Diode) backlight. The current mainstream of backlight technology. There are two types of LED backlight: direct-type and side-type. The method of side-type LED backlight is to set the LED lights around the LCD screen, and guide the light to the LCD screen through the light guide plate to achieve the purpose of lighting. The traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 王坚高建峰刘杞洪
Owner SHENZHEN TCL NEW-TECH CO LTD
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