Backlight module

Abstract

The invention discloses a backlight module comprising a plurality of light-source arrays, a current alignment circuit and a light source driving circuit, wherein each light-source array respectively comprises N luminescence units, N is an integer which is more than 1, the first ends of the luminescence units are electrically connected with each other, and the second end of the ith luminescence unit is electrically connected with the ith potential switching line, wherein i is an integer which is more than or equal to 1 and less than or equal to N; on the other hand, the current alignment circuit can supply and control the current of each light-source array through the ith potential switching line; and the light source driving circuit is used for sequentially starting the light-source arrays.

Description

technical field [0001] The present invention relates to a light source module, and in particular to a backlight module. Background technique [0002] In recent years, backlight modules in liquid crystal displays mostly use light emitting diodes (Light Emitting Diodes, LEDs), which have the characteristics of long life, high efficiency, and low environmental pollution, as backlight sources. Among them, the size of the light source emitted by the light-emitting diode is related to the image quality of the liquid crystal display, so the current industrial technology is all focused on the design of the backlight module. [0003] figure 1 It is shown as a circuit block diagram of an existing backlight module. refer to figure 1 , the existing backlight module 100 utilizes the output voltage V generated by the voltage converter 110 out to drive the LED array 120, wherein the LED array 120 is composed of a plurality of LED strings. The current regulation circuit 130 is used to ...

AI Technical Summary

Problems solved by technology

[0005] However, in the actual application of the existing backlight module 100, since the current of each group of LED strings must be controlled through a switch and a current source, when the contrast of the display image is improved under the area control, the current With the backlight module 100, the number of switches and current sources in the current adjustment circuit 130 must be correspondingly increased

At this time, the existing backlight module 100 will not only consume huge power consumption, but also increase the temperature of its internal circuit, thereby reducing its service life

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