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Image gray scale modulation method and driving circuit of field-enhanced emission display used for big screen

A field emission, image grayscale technology, applied in static indicators, instruments, etc., can solve the problem that ADS technology cannot be directly applied to FED displays, and achieve broad practical value and market application prospects, strong scalability, and flexible control. handy effect

Active Publication Date: 2009-01-14
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

[0007] But FED does not have storage memory function like AC-PDP, so ADS technology cannot be directly applied to FED display

Method used

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  • Image gray scale modulation method and driving circuit of field-enhanced emission display used for big screen
  • Image gray scale modulation method and driving circuit of field-enhanced emission display used for big screen
  • Image gray scale modulation method and driving circuit of field-enhanced emission display used for big screen

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Embodiment Construction

[0029] The image grayscale modulation method applied to the field emission display of the large screen of the present invention divides one line of image data into several sub-line time pulse widths according to the data bit weight to drive, and the usual sub-line display method is to divide one line of data into There are 8 sub-rows, and the lighting time of each sub-row corresponds to different weights, so as to display different gray levels through the combination of each sub-row; each sub-row is composed of an addressing period and a display period, such as figure 2 As shown, the addressing period ( figure 2 The dark part in the middle) sends the display data to the shift register of the driver chip, and the display period ( figure 2The middle white part) uses the high-voltage output driver chip with data shift latch to latch the data and transmit it to the high-voltage output, so as to maintain the display according to the time length divided by the sub-rows, and the s...

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Abstract

The invention provides an image gray-scale modulation method and a driving circuit which are applicable to a field emission display of a large screen, relating to the field of display manufacture technique. The method of the invention adopts a method which carries out the driving by dividing one line of image data into a plurality of sub-line time pulse width according to the weight of data line, and breaks through the limit that the traditional ADS method which is only suitable for displays such as PDP, etc. with memory effect has short luminescence time and large data register. The method of the invention adopts FPGA and a driving chip specially used for a plasma display to carry out control and data processing and realize the gray-scale modulation and driving of FED. The driving circuit consists of three parts: an FPGA control circuit, a gray-scale modulation high-voltage driving circuit and a damping isolating circuit. The driving circuit further improves the integration of the circuit, improves the output pulse voltage of the circuit, leads the contrast of the image displayed by the FED display to be greatly improved, and improves the reliability of the circuit and reduces the cost of the driving circuit simultaneously.

Description

technical field [0001] The invention relates to the technical field of display manufacturing, in particular to an image grayscale modulation method and a driving circuit applied to a large-screen field emission display. Background technique [0002] Field emission display (FED) is a relatively new type of flat panel display, and it is another most promising new type after liquid crystal display (LCD), plasma display (PDP), electroluminescence display (ELD), etc. A generation of flat panel displays. Large-area printed FED adopts unique low-cost large-area low-work function FED cathode material and its cathode slurry. Different from other types of FED, large-area printed FED has low cost, simple process, and the materials used have low The power output feature can reduce the emission voltage required in the FED and simplify the external circuit. The successful research and development of color large-screen printed field emission display is the first at home and abroad. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/22
Inventor 林志贤郭太良徐胜郑可炉
Owner FUZHOU UNIV
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