Dynamic dimming circuit for splicing large-area field emission backlight

A field emission and dynamic dimming technology, applied in static indicators, instruments, etc., can solve problems such as narrow color gamut, high power consumption, and large volume, and achieve the effects of simple circuit, long service life, and low energy consumption
CN101976549BActive Publication Date: 2012-06-27FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUZHOU UNIV
Publication Date
2012-06-27

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Abstract

The invention relates to a dynamic dimming circuit for splicing large-area field emission backlight. The backlight is formed by splicing a plurality of triode field emission backlight units with certain regular shapes, wherein each backlight unit is relatively independent. The dynamic dimming circuit is characterized by comprising a video signal receiving and processing module, a frame storage module and a driving module, wherein the video signal receiving and processing module generates a luminance control signal of each field emission backlight unit according to the received video signal; the frame storage module is used for storing video image data and has a data caching effect; and the driving module performs current and voltage amplification on the luminance control signals so as to drive the field emission backlight.
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Description

technical field

[0001] The invention relates to a liquid crystal display device, in particular to a dynamic dimming circuit of a spliced ​​large-area field emission backlight, which belongs to the field of backlight, and also belongs to the field of video signal processing and control and the field of drive of field emission devices. Background technique

[0002] At present, liquid crystal display (LCD) has been widely used in TVs, mobile phones, computers, monitors and other equipment. As an indispensable part of LCD, backlight is mainly used at present. LED) assembled. However, cold-cathode fluorescent lamps contain metal mercury that is harmful to the environment, narrow color gamut, insufficient brightness uniformity, short life, large volume, and high power consumption, which are gradually inhibiting their application in the field of large-area backlights. However, semiconductor light-emitting diode backlight sources require heat sinks, which have problems such as high...

Claims

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