Device and method for realizing multi-color backlight by two-line transmission driving method

Abstract

The present invention provides a multi-color backlight realization device, comprising: a positive transmission line, used to transmit a driving current of one frequency; The light emitting unit has a first terminal and a second terminal, wherein n is a natural number greater than 1; the first to nth passive filters are used to respectively output driving currents of the first to nth frequencies to turn on the first to nth light emitting A corresponding one of the units, wherein each passive filter includes: an input terminal connected to the positive transmission line, an output terminal connected to the first end of a corresponding one of the first to n light-emitting units, and a negative transmission line The connected ground terminal; the negative transmission line is connected to the second terminals of the first to nth light-emitting units. Compared with the previous multi-color backlight driving method, the invention reduces the number of transmission lines, saves the number and cost of electronic components, reduces the complexity of electronic circuits, and improves the reliability of the backlight circuit.

Description

technical field [0001] The present invention relates to a device and method for realizing multiple backlights, more specifically, to a device and method for realizing multi-color backlights by using a two-line transmission driving method. Background technique [0002] Monochromatic (that is, black and white) liquid crystal displays are still widely used in the industrial field due to their advantages such as high reliability and low power consumption. In order to allow users to see the displayed content clearly in a dark environment, we usually add a backlight to the display, and the user can turn on or off the backlight as needed. [0003] figure 1 The backlight structure of the current liquid crystal display module is shown. figure 1 The picture on the left shows the LCD with the backlight turned off; while figure 1 The image on the right shows the LCD with the backlight turned on. [0004] figure 2 Shows the backlighting effect of a liquid crystal display. [0005]...

AI Technical Summary

Problems solved by technology

Although this method realizes the use of two transmission lines to drive backlights of different colors, since the selected driving voltages are different, the number of light-emitting diodes in each group of colors is also different. If they are used as backlights for liquid crystal displays, It will cause problems such as poor backlight uniformity and uneven brightness of various colors.

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