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Video frequency drive circuit for field emission display (FRD)

A driving circuit and field emission technology, applied in cathode ray tube indicators, static indicators, instruments, etc., can solve the problems of inability to realize video image display, small display capacity, etc., and achieve convenient and easy gray scale modulation, voltage High, easily controlled effects

Inactive Publication Date: 2008-02-13
厦门火炬福大显示技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned FED drive circuit has the disadvantages of small display capacity (not greater than 128×128 dot matrix), and can only realize graphic display, that is, it cannot realize video image display, etc.
[0006] At present, there is no FED drive circuit that can be used to display video images in China

Method used

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  • Video frequency drive circuit for field emission display (FRD)
  • Video frequency drive circuit for field emission display (FRD)
  • Video frequency drive circuit for field emission display (FRD)

Examples

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Embodiment Construction

[0022] As shown in Figures 1 to 4, the present invention is composed of a video receiving unit, a video A / D conversion unit, a data buffer unit, a grayscale modulation unit, a post-stage driving unit, and a driving power supply, wherein:

[0023] 1. The function of the video A / D conversion part is to convert the PAL standard TV, VCD or DVD signal into an 8-bit digital signal output of image brightness. Its core device is the video decoder SAA7111 produced by Philips. Through the microcontroller to 1 2 The corresponding registers of the C bus can be written from the address, which can realize 256-level adjustments of brightness, contrast, and chromaticity. The parity field discrimination signal, 13.5MHz sampling clock pulse, field synchronization pulse, line reference signal, system reset signal, etc. can also be separated from the video signal.

[0024] 2. The function of the data buffer part is to write the data into the buffer when the video signal is an odd field, and tak...

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Abstract

This invention provides a FED video drive circuit characterizing in including a video receive unit, an A / D unit, a buffer storage unit for storing the video data, a tonal value modulation unit, a power amplified rear dirve unit and a power supply. The circuit sends PAL video image signal to the bubber stroage after A / D collection and realizes the image zone capture, then transfers the image data in line-by-line scanning and finishes its tonal value recovery to be sent to the rear power drive amplifier to generate drive pulse to drive FED display screen, a supply supplies the above mentioned circuit, capable of collecting and processing single color vedeo image timely and displaying it on FED, solving the problem of displaying real time video image on FED.

Description

technical field [0001] The invention belongs to the technical field of display manufacturing, in particular to a video drive circuit for a field emission display device. Background technique [0002] The main purpose of the field emission display video drive circuit is: according to the comprehensive factors such as the electrical and optical parameters of the field emission display and the pixel resolution parameters of the display, the circuit provides matching video images and scanning driving voltage and current pulses to reproduce the video image on the display. [0003] Currently, displays mainly include cathode ray tubes (CRTs) and flat panel displays (FPDs). Due to the insurmountable inherent shortcomings of CRT, such as bulky, heavy, and X-ray radiation, it has been gradually eliminated. FPD has overcome many shortcomings of CRT and has been widely used more and more, and has a tendency to replace CRT. Field emission display is a relatively new type of FPD, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/22G09G5/395G09G1/00G09G5/00
Inventor 郭太良林志贤
Owner 厦门火炬福大显示技术有限公司
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