KR100585633B1 - Driving Method of Plasma Display Panel for Radio Frequency - Google Patents

Driving Method of Plasma Display Panel for Radio Frequency Download PDF

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KR100585633B1
KR100585633B1 KR1019990020304A KR19990020304A KR100585633B1 KR 100585633 B1 KR100585633 B1 KR 100585633B1 KR 1019990020304 A KR1019990020304 A KR 1019990020304A KR 19990020304 A KR19990020304 A KR 19990020304A KR 100585633 B1 KR100585633 B1 KR 100585633B1
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discharge
plasma display
driving method
pdp
electrode
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KR1019990020304A
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Korean (ko)
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KR20010001233A (en
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송준원
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엘지전자 주식회사
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/293—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for address discharge
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Abstract

본 발명은 방전전압을 낮춤과 아울러, 방전효율이 향상되도록 하는 고주파용 플라즈마 표시장치의 구동방법에 관한 것이다.The present invention relates to a method of driving a high frequency plasma display device which reduces the discharge voltage and improves the discharge efficiency.

본 발명의 고주파용 플라즈마 표시장치의 구동방법은 라인별로 적어도 2회의 어드레스 방전을 순차 수행하는 라인 어드레싱 구간을 다수 조합하여 하나의 어드레싱 구간을 구성한다. In the driving method of the high frequency plasma display device of the present invention, one addressing period is formed by combining a plurality of line addressing periods which sequentially perform at least two address discharges per line.

이러한, 고주파용 플라즈마 표시장치의 구동방법에 의해 방전전압을 낮춤과 아울러, 발광효율을 향상시키게 된다. The driving method of the high frequency plasma display device reduces the discharge voltage and improves the luminous efficiency.

Description

고주파용 플라즈마 표시장치의 구동방법{Driving Method of Plasma Display Panel for Radio Frequency}Driving method of high frequency plasma display device {Driving Method of Plasma Display Panel for Radio Frequency}

도 1은 종래의 RF용 PDP 구조를 도시한 사시도.1 is a perspective view showing a conventional PDP structure for RF.

도 2는 도 1의 전극 배치를 도시한 평면도.FIG. 2 is a plan view showing the electrode arrangement of FIG. 1; FIG.

도 3은 RF용 PDP의 동작원리를 설명하기 위해 도시한 도면.3 is a view for explaining the operation principle of the RF PDP.

도 4는 종래의 RF용 PDP의 구동방법을 설명하기 위해 도시한 도면.4 is a view for explaining a conventional method of driving a PDP for RF.

도 5는 본 발명의 RF용 PDP의 구동방법을 설명하기 위해 도시한 도면.5 is a view for explaining a method of driving a PDP for RF of the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

2 : 데이터전극 4 : 스캔전극2: data electrode 4: scan electrode

6 : 고주파전극 8 : 하부기판6: high frequency electrode 8: lower substrate

10 : 상부기판 12 : 격벽10: upper substrate 12: bulkhead

14 : 형광체 16 : 유전층14 phosphor 16: dielectric layer

20 : 방전셀20: discharge cell

본 발명은 평판표시장치의 구동방법에 관한 것으로, 특히 방전전압을 낮춤과 아울러, 방전효율이 향상되도록 구동하는 고주파용 플라즈마 표시장치의 구동방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving method of a flat panel display device, and more particularly, to a driving method of a high frequency plasma display device which drives a discharge voltage and improves discharge efficiency.

최근, 액정표시장치(Liquid Crystal Display), 전계방출 표시장치(Field Emission Display) 및 플라즈마 디스플레이 패널(Plasma Display Panel; 이하 "PDP"라 함)등의 평면 표시장치가 활발히 개발되고 있으며, 이들 중 PDP는 단순구조에 의한 제작의 용이성, 휘도 및 발광 효율의 우수, 메모리 기능 및 160。 이상의 광시야각을 갖는 점과 아울러 40 인치이상의 대화면을 구현할 수 있는 장점을 가지고 있다. 이러한 PDP는 유지방전의 횟수를 조절함에 의해 화상 표시에 필요한 단계적인 밝기, 즉 그레이 스케일(Gray Scale)을 구현하게 된다. 이와같이 유지방전횟수는 PDP의 휘도 및 방전효율을 결정하는 중요한 요소로 인식되고 있다. 실제로, 교류방식의 PDP에서는 유지방전을 수행하기 위해 통상 10 - 100㎑의 구형펄스를 주기적으로 인가하게 된다. 이 경우, 유지방전은 서스테인 펄스당 극히 짧은 순간에 1번씩만 발생하게 된다. 또한, 유지방전에 의해 발생된 하전입자들은 서스테인 전극쌍에 형성된 방전경로를 전극의 극성을 따라 이동함으로써 셀의 방전공간 내부에는 공간전하가 형성되고 이 공간전하에 의해 방전공간 내의 방전전압이 감소하면서 방전개시 전압보다 낮은 전압으로 서스테인을 지속할 수 있다. 이때, 유지펄스에 의한 유지방전은 매 펄스마다 극히 짧은 순간에 1번씩만 발생하고 그외의 대부분의 시간은 벽전하 형성 및 다음 방전을 위한 준비단계로 소비됨으로써 PDP의 방전효율이 저하되게 된다. 이러한 문제를 해결하기 위해 고주파(Radio Frequency; 이하 "RF"라 한다)용 PDP가 제안되고 있다. 도 1 내지 도 3을 결부하여 종래의 RF용 PDP에 대하여 살펴보기로 한다. Recently, flat display devices such as liquid crystal displays, field emission displays, and plasma display panels (hereinafter referred to as "PDPs") have been actively developed. The simple structure has the advantages of ease of fabrication, excellent brightness and luminous efficiency, memory function, and a wide viewing angle of 160 ° or more, and a large screen of 40 inches or more. The PDP realizes stepwise brightness, ie, gray scale, necessary for displaying an image by adjusting the number of sustain discharges. Thus, the number of sustain discharges is recognized as an important factor for determining the brightness and discharge efficiency of the PDP. In fact, in the AC type PDP, in order to perform sustain discharge, a spherical pulse of 10-100 Hz is periodically applied. In this case, the sustain discharge occurs only once at an extremely short instant per sustain pulse. In addition, the charged particles generated by the sustain discharge are moved along the polarity of the discharge path formed in the sustain electrode pair to form a space charge inside the discharge space of the cell, and the discharge voltage in the discharge space decreases due to the space charge. Sustain can be maintained at a voltage lower than the starting voltage. At this time, the sustain discharge caused by the sustain pulse is generated only once at an extremely short moment every pulse, and most of the other time is consumed in the preparation stage for the wall charge formation and the next discharge, thereby lowering the discharge efficiency of the PDP. In order to solve this problem, a PDP for radio frequency (hereinafter referred to as "RF") has been proposed. 1 to 3, a conventional RF PDP will be described.

도 1을 참조하면, 종래의 RF용 PDP는 하부기판(8)의 상부에 형성된 데이터 전극(2)과, 데이터전극(2)과 직교하도록 유전층(16)에 실장된 스캔전극(4)과, 유전층(16)의 상부에 수직으로 형성되어 각각의 방전셀을 분할하는 격벽(12)과, 격벽(12)의 내측벽에 도포되어 광빔을 발생하는 형광체(14)와, 상부기판(10)의 상부에 투명하게 형성되어 RF신호를 인가하는 RF전극(6)을 구비한다. 도 2를 결부하여 전극의 배열상태를 살펴보면, 하부기판(8)에는 제1 내지 제m 데이터 전극(D1 내지 Dm)과 직교하도록 제1 내지 제n 스캔전극(S1 내지 Sn)이 형성되어 있다. 이때, 스캔전극(4)과 데이터 전극(2) 에 의해 어드레스 방전이 일어나게 된다. 상부기판 (10)에는 스캔전극(4)과 동일한 방향으로 형성된 n개의 RF전극(6)이 공통 접속되도록 배치되어 있다. 이때, 스캔전극(4)과 RF전극(6)은 서로 대향되도록 배치되어 있으며, 상기 두 전극에 의해 서스테인 방전이 일어나게 된다. Referring to FIG. 1, the conventional RF PDP includes a data electrode 2 formed on the lower substrate 8, a scan electrode 4 mounted on the dielectric layer 16 to be orthogonal to the data electrode 2, and A partition 12 formed vertically on top of the dielectric layer 16 to divide each discharge cell, a phosphor 14 applied to an inner wall of the partition 12 to generate a light beam, and an upper substrate 10 It is provided with an RF electrode 6 formed on the transparent to apply an RF signal. Referring to FIG. 2, the arrangement of the electrodes is illustrated in the lower substrate 8, and the first to n th scan electrodes S1 to Sn are orthogonal to the first to m th data electrodes D1 to Dm. At this time, the address discharge is caused by the scan electrode 4 and the data electrode 2. On the upper substrate 10, n RF electrodes 6 formed in the same direction as the scan electrodes 4 are arranged to be commonly connected. In this case, the scan electrode 4 and the RF electrode 6 are disposed to face each other, and the sustain discharge is caused by the two electrodes.

한편, 도 3을 결부하여 RF용 PDP의 동작에 대하여 설명하기로 한다. 데이터 신호에 대응하도록 데이터 전극(2) 및 스캔전극(4) 사이에 구동전압이 인가되면, 어드레스 방전이 수행되어 방전셀에는 하전입자가 발생하게 된다. 이때를 어드레싱 구간이라 한다. 또한, 어드레싱 구간동안 형성된 하전입자들은 RF전극(6)에 인가된 RF펄스에 의해 진동운동함으로써 방전셀 내부를 연속적으로 이온화시킴과 아울러, 여기시키게 되어 방전시간동안 연속적인 방전을 일으키게 한다. 이때를 서스테인 구간이라 한다. 이 경우, RF펄스는 수㎒ - 수십㎒의 구형펄스(또는 사인파)를 사용하는 것이 바람직하다. Meanwhile, the operation of the RF PDP will be described with reference to FIG. 3. When a driving voltage is applied between the data electrode 2 and the scan electrode 4 to correspond to the data signal, address discharge is performed to generate charged particles in the discharge cell. This is called an addressing section. In addition, the charged particles formed during the addressing period are vibrated by the RF pulse applied to the RF electrode 6 to continuously ionize and excite the inside of the discharge cell, thereby causing continuous discharge during the discharge time. This is called a sustain period. In this case, it is preferable to use a rectangular pulse (or sine wave) of several MHz to several tens of MHz.

한편, 도 4를 결부하여 RF용 PDP의 계조구현에 대하여 살펴보기로 한다. 도 4에 도시된 ADS(Addressing Display Separated; 이하 "ADS"라 한다) 구동방법은 구현하고자 하는 계조에 따라 한 프레임(Frame)을 복수개의 서브필드(Sub Field)로 분할하여 구동하는 방식으로 교류형 PDP 및 RF용 PDP에서도 적용될수 있는 방법이 된다. 하나의 서브필드는 어드레스 방전을 수행하는 어드레싱 구간과 RF방전을 수행하는 서스테인 구간으로 구분되어진다. 이때, 서스테인 구간의 방전전압을 낮춤과 아울러, 발광효율을 향상시키기 위해서는 어드레싱 구간동안 충분히 많은 양의 하전입자들을 생성하는 것이 바람직하다. 도 4에 도시된 바와같이 어드레싱 구간동안 한 라인의 어드레싱을 위해 데이터신호와 반대의 극성을 갖는 스캔펄스를 인가하여 어드레스 방전을 수행하게 된다. 그러나, 종래의 RF용 PDP에서는 한 라인의 어드레싱을 위해 한번의 어드레스 방전을 수행함에 의해 발생되는 하전입자로는 서스테인 방전에 필요한 하전입자들이 불충분하게 된다. 이에따라, 서스테인 구간동안의 방전전압이 증가함과 아울러, 발광효율이 저하되는 문제점이 도출되고 있다. On the other hand, with reference to Figure 4 will be described with respect to the gray scale implementation of the RF PDP. The ADS (Addressing Display Separated) driving method shown in FIG. 4 is an AC type in which a frame is divided into a plurality of subfields and driven according to a gray scale to be implemented. It can be applied to PDP and PDP for RF. One subfield is divided into an addressing period for performing an address discharge and a sustaining period for performing an RF discharge. In this case, in order to lower the discharge voltage of the sustain period and to improve the luminous efficiency, it is preferable to generate a sufficient amount of charged particles during the addressing period. As shown in FIG. 4, the address discharge is performed by applying a scan pulse having a polarity opposite to that of the data signal for addressing one line during the addressing period. However, in the conventional RF PDP, charged particles required for sustain discharge are insufficient as charged particles generated by performing one address discharge for one line of addressing. As a result, a problem arises in that the discharge voltage during the sustain period increases and the luminous efficiency decreases.

따라서, 본 발명의 목적은 방전전압을 낮춤과 아울러, 방전효율이 향상되도록 구동하는 고주파용 플라즈마 표시장치의 구동방법을 제공하는데 있다.Accordingly, it is an object of the present invention to provide a driving method of a high frequency plasma display device which drives the discharge voltage while lowering the discharge efficiency.

상기 목적을 달성하기 위하여 본 발명의 고주파용 플라즈마 표시장치의 구동방법은 라인별로 적어도 2회의 어드레스 방전을 순차 수행하는 라인 어드레싱 구간을 다수 조합하여 하나의 어드레싱 구간을 구성하여 어드레스 방전을 수행한다.In order to achieve the above object, the driving method of the high-frequency plasma display device of the present invention configures one addressing period by combining a plurality of line addressing periods which sequentially perform at least two address discharges per line to perform address discharge.

상기 목적외에 본 발명의 다른 목적 및 특징들은 첨부도면을 참조한 실시예에 대한 설명을 통하여 명백하게 드러나게 될 것이다.Other objects and features of the present invention other than the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

도 5를 참조하여 본 발명의 바람직한 실시예에 대하여 설명 하기로 한다.A preferred embodiment of the present invention will be described with reference to FIG. 5.

도 5를 참조하면, 본 발명의 RF용 PDP의 구동방법을 설명하기 위한 도면이 도시되어 있다.
본 발명의 RF용 PDP의 구동방법은 어드레싱 구간 동안에 한 라인의 어드레싱을 위해 2번의 어드레스 방전을 수행한다. 이를위해, 도 5의 (c)에 도시된 바와같이 어드레스 구간동안 한 라인의 어드레싱을 위해 스캔전극에 음의전압레벨을 갖는 스캔펄스와 양의 전압레벨을 갖는 스캔펄스를 순차적으로 인가한다.
먼저, 스캔전극에 음의 전압레벨을 갖는 스캔펄스와 일치하도록 데이터 전극에 도 5의 (b)에 도시된 바와같이 양의 전압레벨을 갖는 펄스를 인가하면 첫번째 어드레스방전이 수행되어 유전층(도시되지 않음)의 상부에 양(+)의 벽전하가 쌓이게 된다. 이어서, 스캔전극에 양의 전압레벨을 갖는 스캔펄스를 상기 유전층에 축적된 양(+)의 벽전하와 스캔전극에 인가된 양의 전압레벨이 더해져 2번째 어드레스 방전이 수행된다. 이때, 데이터 전극은 기준레벨로 작용하게 된다. 이러한 과정에 의해 어드레싱 구간 동안에 많은 양의 하전입자가 형성된다.
이어서, 서스테인 구간동안 도 5의 (a)에 도시된 바와 같이 RF전극에 인가된 RF펄스에 의해 상기 많은 양의 하전입자들이 진동운동함으로써 방전셀 내부를 연속적으로 이온화시킴과 아울러, 여기시키게 되어 방전시간 동안 연속적인 방전을 일으키게 한다. 이 경우, 하전입자의 양이 많아지므로 방전전압이 낮아지게 됨과 아울러, 발광효율이 향상된다. Referring to FIG. 5, there is shown a diagram for explaining a method of driving an RF PDP of the present invention.
The driving method of the RF PDP of the present invention performs two address discharges for addressing one line during the addressing period. To this end, as shown in (c) of FIG. 5, scan pulses having a negative voltage level and scan pulses having a positive voltage level are sequentially applied to the scan electrodes for addressing one line during the address period.
First, when a pulse having a positive voltage level is applied to the data electrode as shown in FIG. Positive wall charges build up on top of the Subsequently, the second address discharge is performed by adding a scan pulse having a positive voltage level to the scan electrode and a positive wall charge accumulated in the dielectric layer and a positive voltage level applied to the scan electrode. At this time, the data electrode acts as a reference level. This process forms a large amount of charged particles during the addressing period.
Subsequently, a large amount of charged particles vibrate by the RF pulse applied to the RF electrode during the sustain period, thereby continuously ionizing and exciting the inside of the discharge cell, as shown in FIG. Causing continuous discharge over time. In this case, since the amount of charged particles increases, the discharge voltage is lowered and the luminous efficiency is improved.

상술한 바와같이, 본 발명의 RF용 PDP의 구동방법은 방전전압을 낮춤과 아울러, 발광효율을 향상시킬 수 있는 장점이 있다. As described above, the driving method of the RF PDP of the present invention has the advantage of lowering the discharge voltage and improving luminous efficiency.

이상 설명한 내용을 통해 당업자 라면 본 발명의 기술사상을 일탈하지 아니하는 범위에서 다양한 변경 및 수정이 가능함을 알수 있을 것이다. 따라서, 본 발명의 기술적 범위는 명세서의 상세한 설명에 기재된 내용으로 한정되는 것이 아니라 특허 청구의 범위에 의해 정하여 져야만 할 것이다.Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (3)

라인별로 적어도 2회의 어드레스 방전을 순차 수행하는 라인 어드레싱 구간을 다수 조합하여 하나의 어드레싱 구간을 구성함을 특징으로 하는 고주파용 플라즈마 표시장치의 구동 방법. A method of driving a high frequency plasma display device, characterized in that one addressing section is formed by combining a plurality of line addressing sections sequentially performing at least two address discharges per line. 제 1 항에 있어서, 상기 어드레스 방전은, The method of claim 1, wherein the address discharge, 스캔전극에 음의 전압레벨을 갖는 스캔펄스와 일치하도록 데이터 전극에 양의 전압레벨을 갖는 펄스를 인가하여 수행되는 제1 어드레스방전과,A first address discharge performed by applying a pulse having a positive voltage level to the data electrode to coincide with a scan pulse having a negative voltage level on the scan electrode; 상기 스캔전극에 양의 전압레벨을 갖는 스캔펄스를 인가하여 수행되는 제2 어드레스 방전으로 이루어짐을 특징으로 하는 고주파용 플라즈마 표시장치의 구동방법.And a second address discharge performed by applying a scan pulse having a positive voltage level to the scan electrode. 삭제delete
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