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Segmented controlled drive device of light-emitting diodes (LEDs)

A light-emitting diode and segmented control technology, applied to instruments, static indicators, etc., can solve the problems of incomplete use of the channels of the drive device, waste of manufacturing costs of liquid crystal displays, etc.

Active Publication Date: 2014-07-02
MACROBLOCK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention proposes a driving device for segmental control of light-emitting diodes to solve the problem that the channels of the driving device are not fully used, resulting in a waste of manufacturing costs for liquid crystal displays using light-emitting diodes as backlight sources

Method used

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  • Segmented controlled drive device of light-emitting diodes (LEDs)
  • Segmented controlled drive device of light-emitting diodes (LEDs)
  • Segmented controlled drive device of light-emitting diodes (LEDs)

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Embodiment Construction

[0039] Please refer to figure 1 , is a schematic diagram of the circuit connection of the first embodiment of the driving device for segmental control according to the present invention applied to light-emitting diodes arranged in an array. The segmentally controlled drive device 100a, 100b for light-emitting diodes is suitable for driving a plurality of light-emitting diodes 90 arranged in an array. In this embodiment, the driving device 100a for segment control and the driving device 100b for segment control can respectively drive sixteen channels, and each channel may contain one or more light-emitting diodes 90, and the light-emitting diodes 90 in the same channel For synchronous operation, taking this embodiment as an example, each channel has only one light emitting diode 90 , but it is not limited thereto. As can be seen from the figure, since there are only 30 LEDs 90 in the LED array, the last two channels of the second segment-controlled driving device 100b are not co...

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Abstract

The invention discloses a segmented controlled drive device of light-emitting diodes (LEDs), which is suitable for driving a plurality of light-emitting diodes which are arranged in an array way. When a latch actuating signal for segmenting is received by the drive device, a group channel signal is registered in a group channel data area, a counting value at the moment is registered in a counting data area, when a latch actuating signal for segment updating is received by the drive device, a brightness signal is updated to a buffering circuit according to a designated channel of the group channel data area, and a comparison circuit outputs a drive signal according to the registered counting value, the instant counting value and the updated brightness signal so as to drive the light-emitting diodes in segmentation way.

Description

technical field [0001] The invention relates to a driving device of a light-emitting diode, in particular to a driving device suitable for driving a light-emitting diode backlight source of a liquid crystal display (Liquid Crystal Display, LCD), which can be updated and controlled by time divisions. Background technique [0002] Compared with general light sources, light emitting diodes (Light Emitting Diodes, LEDs) have the advantages of long life, low power consumption, and not easily damaged, making light emitting diodes an important object in human research and development and life applications. [0003] In recent years, liquid crystal displays have been widely used by humans. Since liquid crystal molecules do not emit light by themselves, light must be provided by the backlight module to achieve the display function. At present, the commonly used light source of the backlight module is a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), but the respo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36
Inventor 李振戎李宏斌郑扬旗
Owner MACROBLOCK INC
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