A driving device for el cold light sheet generating forward and reverse square wave driving
A square wave driving and driving device technology, applied in the field of backlight driving, can solve the problem of inability to reduce the thickness of PCBA, and achieve the effect of good uniform effect
Inactive Publication Date: 2017-05-10
HUIZHOU TCL MOBILE COMM CO LTD
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide an EL cold-light drive device that generates forward and reverse square-wave drives for the above-mentioned defects of the prior art, aiming at solving the problem that the drive circuit of the existing EL cold-light cannot make the thickness of the PCBA Meet the thinning requirements
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[0024] The present invention provides an EL electroluminescent film drive device that generates forward and reverse square wave drives. In order to make the purpose, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] see figure 1 , the present invention provides an EL electroluminescent film drive device that generates forward and reverse square wave drives, including a first boost module 100, a second boost module 200, a control module 300 and a conversion module 400, and the first boost module 100 is connected to the second boost module Two booster modules 200 , the conversion module 400 is connected to the second booster module 200 , the control module 300 and the E...
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The invention discloses an EL cold light piece drive device for generating forward / reverse square wave drive. The EL cold light piece drive device comprises a first boosting module, a second boosting module, a control module and a conversion module. The first boosting module is connected with the second boosting module, and the conversion module is connected with the control module and an EL cold light piece. The first boosting module boosts the input voltage into first voltage. The second boosting module boosts the first voltage into direct current voltage of the preset voltage value and then outputs the direct current voltage to the conversion module to supply power to the conversion module. The conversion module generates forward / reverse square wave signals according to square wave signals and control signals to drive the EL cold light piece to emit light, wherein the square wave signals and control signals are output by the control module. By means of the EL cold light piece drive device, the backlight requirement for thin-type electronic products is met, a rather good uniform effect is achieved through the brightness, and backlight control over different brightness can be further achieved.
Description
technical field [0001] The present invention relates to the technical field of backlight driving of terminal equipment, in particular to an EL cold light chip driving device generating forward and reverse square wave driving. Background technique [0002] At present, some electronic products take thinning as the main research and development purpose. For example, DJ MIX electronic products, which can be connected with mobile phones or tablets to play DJ music. The DJ MIX electronic product needs to be very thin, with a total thickness of about 4.5MM. In the structure of the DJ MIX electronic product, PCBA (Printed Circuit Board + Assembly, the finished circuit board obtained after the empty PCB board passes through the SMT assembly and the entire process of the DIP plug-in) has a thickness of nearly 2MM, and the touch structure and exterior The box structure has a total thickness of 2MM. The thickness of the backlight is only 0.5MM left. In order to ensure that DJ MIX el...
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IPC IPC(8): H05B37/02
Inventor 王江
Owner HUIZHOU TCL MOBILE COMM CO LTD