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] ...

Examples

Embodiment Construction

[0041] The present invention will be fully described below with reference to the accompanying drawings showing embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0042] It will be understood that when an "element" is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected to" or "directly coupled to" another element, there are no intervening elements present. The same reference numerals designate the same elements. As used herein, the term "and / or" i...

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] ...

Examples

Embodiment Construction

[0041] The present invention will be fully described below with reference to the accompanying drawings showing embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.

[0042] It will be understood that when an "element" is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected to" or "directly coupled to" another element, there are no intervening elements present. The same reference numerals designate the same elements. As used herein, the term "and / or" i...

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