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Electron emission device (EED) with low background-brightness

A technology of electron emission and scanning electrodes, which can be used in instruments, static indicators, etc., to solve problems such as reduced contrast and reduced background brightness.

Inactive Publication Date: 2006-02-22
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, when no data is applied, the contrast decreases as the background brightness increases, requiring a method of reducing the background brightness

Method used

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  • Electron emission device (EED) with low background-brightness
  • Electron emission device (EED) with low background-brightness
  • Electron emission device (EED) with low background-brightness

Examples

Experimental program
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Embodiment Construction

[0025] The invention will be described more specifically below with reference to the accompanying drawings showing typical embodiments of the invention.

[0026] figure 1 is the block diagram of the EED. refer to figure 1 , the EED includes an electron emission display panel 10 and a driving device for driving the electron emission display panel 10 . The drive device includes an image processing unit 15 , a panel control unit 16 , a scan drive unit 17 , a data drive unit 18 and a power supply unit 19 .

[0027] The image processing unit 15 generates internal image signals such as red, green, and blue image data, clock signals, and vertical and horizontal synchronization signals by converting external analog image signals into digital signals.

[0028] The panel control unit 16 outputs the data-driven control signal S according to the internal image signal from the image processing unit 15. D and scan drive control signal S S Composed of drive control signals S D and S S...

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PUM

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Abstract

An Electron Emission Device (EED) that can reduce background-brightness resulting from collisions between anodes and only a few electrons when data is not supplied to an electron emission display panel includes: an electron emission display panel including scan electrodes, data electrodes, and anodes, electrons colliding with the anode in accordance with a voltage difference between the scan electrodes and the data electrodes; a discharge current measuring unit adapted to measure a discharge current value of the electron emission display panel; a comparison unit adapted to output control signals proportional to a current difference between the measured discharge current value and an inputted reference value; a scan voltage control unit adapted to amplify an output voltage of sequentially outputted scanning signals to scan electrode lines of the electron emission display panel according to scan driving signals having a predetermined frequency, the scan voltage control unit operating in accordance with the control signals of the comparison unit; and a scan driving unit.

Description

[0001] This application hereby references, incorporates and claims the benefit under 35 U.S.C. §119 of Korean Patent Application with assigned serial number KR 10-2004-0050477, filed with the Korean Intellectual Property Office on June 30, 2004, Titled Electron Emission Devices with Low Background Brightness. technical field [0002] The present invention relates to an electron emission device (EED) which controls the background brightness by adjusting the scanning signal voltage, and in particular to an EED which reduces the potential difference between the scanning signal voltage and the data electrode line voltage, which is proportional to the discharge current, when the data When the electron emission display panel is not supplied, background brightness is reduced due to collision between a small amount of electrons and the anode. Background technique [0003] The EED includes an electron emission display panel and a driving device that drives the electron emission displ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20
CPCG09G3/22G09G2360/16G09G3/2014G09G2360/18G09G2320/029G09G2320/0238G09G2320/0626G09G2310/063
Inventor 金成权
Owner SAMSUNG SDI CO LTD