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Device and method for realizing multi-color backlight by means of two-line transmission diving method

A realization method and backlight technology, applied to instruments, static indicators, etc., can solve the problems of different light emitting diodes, poor backlight uniformity, uneven color brightness, etc., and achieve the goals of reducing complexity, reducing quantity, saving quantity and cost Effect

Active Publication Date: 2014-01-15
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method realizes using 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.

Method used

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  • Device and method for realizing multi-color backlight by means of two-line transmission diving method
  • Device and method for realizing multi-color backlight by means of two-line transmission diving method
  • Device and method for realizing multi-color backlight by means of two-line transmission diving method

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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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Abstract

The invention provides a multi-color backlight realizing device which comprises a positive pole transmission line used for transmitting driving currents of one kind of frequency, first to nth light emitting units used for displaying first to nth colors of light respectively, first to nth passive filters used for outputting driving currents of first to nth frequencies respectively to switch on one of the first to nth light emitting units correspondingly, and a negative pole transmission line connected with second ends of the first to nth light emitting units, wherein each light emitting unit is provided with a first end and a second end, n is a natural number which is larger than 1, and each passive filter comprises an input end connected to the positive pole transmission line, an output end connected to the first end of one of the first to nth light emitting units correspondingly, and a grounding end connected with the negative pole transmission line. Compared with a prior multi-color backlight driving method, the multi-color backlight realizing method has the advantages that the number of transmission lines is reduced, the number and cost of electronic elements are reduced, the complexity of an electronic circuit is reduced, and the reliability of a backlight circuit is improved.

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] Monochrome (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 A shows the LCD with the backlight turned off; while figure 1 B shows the LCD with the backlight turned on. [0004] figure 2 Shows the backlighting effect of a liquid crystal display. [0005] Generally, the backlight source of a liquid c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 费维和V.莫利顿李婵娟
Owner SCHNEIDER ELECTRIC IND SAS
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