KR20050038892A - Driving method of plasma display panel - Google Patents
Driving method of plasma display panel Download PDFInfo
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- KR20050038892A KR20050038892A KR1020030074204A KR20030074204A KR20050038892A KR 20050038892 A KR20050038892 A KR 20050038892A KR 1020030074204 A KR1020030074204 A KR 1020030074204A KR 20030074204 A KR20030074204 A KR 20030074204A KR 20050038892 A KR20050038892 A KR 20050038892A
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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
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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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
- G09G3/294—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 lighting or sustain discharge
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
본 발명은 플라즈마 디스플레이 패널의 구동방법에 관한 것이다. 본 발명에 따르면 PDP 구동파형의 유지 구간에서 첫 번째 유지방전 펄스의 폭을 방전가스 내의 Xe의 비율에 따라 각각 다르게 설정한다. 이와 같이 하면, 고효율의 PDP에서도 두 번째 유지방전을 안정적으로 일으킬 수 있다. The present invention relates to a method of driving a plasma display panel. According to the present invention, the width of the first sustain discharge pulse is set differently according to the ratio of Xe in the discharge gas in the sustain section of the PDP driving waveform. In this way, a second sustain discharge can be stably generated even in a high efficiency PDP.
Description
본 발명은 플라즈마 디스플레이 패널(plasma display panel; PDP)의 구동방법에 관한 것으로, 특히 안정적인 방전을 위한 플라즈마 디스플레이 패널의 구동방법에 관한 것이다.The present invention relates to a method of driving a plasma display panel (PDP), and more particularly to a method of driving a plasma display panel for stable discharge.
최근 액정표시장치(liquid crystal display; LCD), 전계 방출 표시장치(field emission display; FED), PDP 등의 평면 표시 장치가 활발히 개발되고 있다. 이들 평면 표시 장치 중에서 PDP는 다른 평면 표시 장치에 비해 휘도 및 발광효율이 높으며 시야각이 넓다는 장점이 있다. 따라서, PDP가 40인치 이상의 대형 표시 장치에서 종래의 CRT(cathode ray tube)를 대체할 표시 장치로서 각광받고 있다. Recently, flat display devices such as liquid crystal displays (LCDs), field emission displays (FEDs), and PDPs have been actively developed. Among these flat panel display devices, PDPs have advantages of higher luminance and luminous efficiency and wider viewing angles than other flat panel display devices. Therefore, the PDP is in the spotlight as a display device to replace the conventional cathode ray tube (CRT) in a large display device of 40 inches or more.
PDP는 기체 방전에 의해 생성된 플라즈마를 이용하여 문자 또는 영상을 표시하는 평면 표시 장치로서, 그 크기에 따라 수십에서 수백 만개 이상의 픽셀(pixel)이 매트릭스(matrix)형태로 배열되어 있다. 이러한 PDP는 인가되는 구동 전압 파형의 형태와 방전 셀의 구조에 따라 직류형(DC형)과 교류형(AC형)으로 구분된다.PDPs are flat display devices that display characters or images using plasma generated by gas discharge, and dozens to millions or more of pixels are arranged in a matrix according to their size. Such PDPs are classified into a direct current type (DC type) and an alternating current type (AC type) according to the shape of the driving voltage waveform applied and the structure of the discharge cell.
직류형 PDP는 전극이 방전 공간에 그대로 노출되어 있어서 전압이 인가되는 동안 전류가 방전공간에 그대로 흐르게 되며, 이를 위해 전류제한을 위한 저항을 만들어 주어야 하는 단점이 있다. 반면 교류형 PDP에서는 전극을 유전체층이 덮고 있어 자연스러운 캐패시턴스 성분의 형성으로 전류가 제한되며 방전시 이온의 충격으로부터 전극이 보호되므로 직류형에 비해 수명이 길다는 장점이 있다. In the DC-type PDP, since the electrode is exposed to the discharge space as it is, the current flows in the discharge space while voltage is applied, and there is a disadvantage in that a resistance for current limitation must be made for this purpose. On the other hand, in the AC type PDP, the electrode covers the dielectric layer, so the current is limited by the formation of a natural capacitance component, and the electrode is protected from the impact of ions during discharge.
도 1은 AC형 플라즈마 디스플레이 패널의 일부 사시도이다. 1 is a partial perspective view of an AC plasma display panel.
도 1에 도시한 바와 같이, 제1유리기판(1) 위에는 유전체층(2) 및 보호막(3)으로 덮인 주사전극(4)과 유지전극(5)이 쌍을 이루어 평행하게 설치된다. 제2유리기판(6) 위에는 절연체층(7)으로 덮인 복수의 어드레스전극(8)이 설치된다. 어드레스전극(8)들 사이에 있는 절연체층(7) 위에는 어드레스 전극(8)과 평행하게 격벽(9)이 형성되어 있다. 또한, 절연체층(7)의 표면 및 격벽(9)의 양측면에 형광체(10)가 형성되어 있다. 제1유리기판(1)과 제2유리기판(6)은 주사전극(4)과 어드레스전극(8) 및 유지전극(5)과 어드레스전극(8)이 직교하도록 방전공간(11)을 사이에 두고 대향하여 배치되어 있다. 어드레스전극(8)과, 쌍을 이루는 주사전극(4)과 유지전극(5)과의 교차부에 있는 방전공간이 방전셀(12)을 형성한다.As shown in FIG. 1, the scan electrode 4 and the sustain electrode 5 covered with the dielectric layer 2 and the protective film 3 are arranged in parallel on the first glass substrate 1. A plurality of address electrodes 8 covered with the insulator layer 7 are provided on the second glass substrate 6. A partition 9 is formed on the insulator layer 7 between the address electrodes 8 in parallel with the address electrode 8. In addition, the phosphor 10 is formed on the surface of the insulator layer 7 and on both side surfaces of the partition wall 9. The first glass substrate 1 and the second glass substrate 6 have a discharge space 11 therebetween so that the scan electrode 4 and the address electrode 8 and the sustain electrode 5 and the address electrode 8 are orthogonal to each other. They are arranged to face each other. The discharge space at the intersection of the address electrode 8 and the pair of the scanning electrode 4 and the sustain electrode 5 forms a discharge cell 12.
도 2는 플라즈마 디스플레이 패널의 전극 배열도를 나타낸다. 2 shows an electrode arrangement diagram of the plasma display panel.
도 2에 도시한 바와 같이, PDP 전극은 m ×n의 매트릭스 구성을 가지고 있으며, 구체적으로 열 방향으로는 어드레스전극(A1~Am)이 배열되어 있고 행방 향으로는 n행의 주사전극(Y1~Yn) 및 유지전극(X1~Xn)이 지그재그로 배열되어 있다. 이하에서는 주사전극을 "Y 전극", 유지전극을 "X 전극"이라 칭한다. 도 2에 도시된 방전셀(12)은 도 1에 도시된 방전셀(12)에 대응한다.As shown in Fig. 2, the PDP electrode has a matrix structure of m x n. Specifically, the address electrodes A1 to Am are arranged in the column direction and the n rows of scanning electrodes Y1 to the row direction. Yn) and sustain electrodes X1 to Xn are arranged in a zigzag. Hereinafter, the scanning electrode will be referred to as "Y electrode" and the sustain electrode as "X electrode". The discharge cell 12 shown in FIG. 2 corresponds to the discharge cell 12 shown in FIG.
도 3은 종래 기술에 의한 플라즈마 디스플레이 패널의 구동파형도를 나타내는 도면이다. 3 is a view showing a driving waveform of the plasma display panel according to the prior art.
도 3에 도시한 바와 같이 종래의 PDP의 구동방법에 따르면 각 서브필드는 리셋구간, 어드레스 구간, 유지구간으로 구성된다. As shown in FIG. 3, according to the conventional PDP driving method, each subfield includes a reset section, an address section, and a sustain section.
리셋구간은 이전의 유지 방전의 벽전하 상태를 소거하고, 다음의 어드레스 방전을 안정적으로 수행하기 위해 벽전하를 셋업(setup) 하는 역할을 한다. The reset section serves to erase the wall charge state of the previous sustain discharge and to set up wall charge in order to stably perform the next address discharge.
어드레스 구간은 패널에서 켜지는 셀과 켜지지 않는 셀을 선택하여 켜지는 셀(어드레싱된 셀)에 벽전하를 쌓아두는 동작을 수행하는 구간이다. 유지 구간은 어드레싱된 셀에 실제로 화상을 표시하기 위한 방전을 수행하는 구간이다. The address section is a section in which wall charges are accumulated on cells (addressed cells) turned on by selecting cells turned on and cells not turned on in the panel. The sustain section is a section in which discharge for actually displaying an image on the addressed cell is performed.
한편, 최근에는 PDP의 효율을 향상시키기 위한 방법으로 방전 가스 중 크세논(Xe)의 비율을 10% 이상으로 높여서 사용하는데, Xe의 비율이 높아질수록 방전 개시 전압도 높아진다. On the other hand, in recent years, as a method for improving the efficiency of the PDP, the ratio of xenon (Xe) in the discharge gas is increased to 10% or more, and as the ratio of Xe increases, the discharge start voltage also increases.
도 4는 Xe의 비율에 따른 방전개시 전압을 나타낸 것이다.4 shows the discharge start voltage according to the ratio of Xe.
도 4에 도시된 바와 같이, Xe의 함량이 높아질수록 방전 개시 전압도 높아지며, 방전 딜레이도 증가되어 유지 방전이 안정적으로 이루어지지 않으므로 PDP 구동이 불안해진다.As shown in Fig. 4, the higher the content of Xe is, the higher the discharge start voltage is, and the discharge delay is also increased, so that sustain discharge is not stable.
이러한 문제점을 해결하기 위하여 종래에는 유지구간의 첫 펄스의 폭을 다른 유지방전 펄스의 폭보다 넓게 설정하였다. 그러나 종래에는 첫 번째 유지방전 펄스의 폭이 고정되어 있었으므로, Xe의 비율에 따라 방전 개시전압 및 방전 딜레이가 증가하는 것에 대응하지 못하여 두 번째 유지방전 펄스에서 지속적으로 안정적인 유지방전이 이루어지지 않았다. In order to solve this problem, conventionally, the width of the first pulse of the sustain period is set wider than that of other sustain discharge pulses. However, since the width of the first sustain discharge pulse is fixed in the related art, the discharge start voltage and the discharge delay are not increased according to the ratio of Xe, and thus the sustain discharge is not continuously stable in the second sustain discharge pulse.
그러므로 본 발명이 이루고자 하는 기술적 과제는 이와 같은 종래의 기술의 문제점을 해결하기 위한 것으로서, 고효율 PDP에 있어서 Xe의 분압에 따라 안정적인 유지방전이 이루어지도록 하는 플라즈마 디스플레이 패널의 구동장치 및 구동방법을 제공하기 위한 것이다. Therefore, the technical problem to be achieved by the present invention is to solve the problems of the prior art, to provide a driving apparatus and a driving method of the plasma display panel to achieve a stable sustain discharge according to the partial pressure of Xe in the high efficiency PDP. It is for.
이러한 기술적 과제를 달성하기 위한 본 발명의 특징에 따른 플라즈마 디스플레이 패널의 구동방법은 복수의 제1 전극 및 제2 전극을 포함하는 플라즈마 디스플레이 패널의 구동방법으로서, A driving method of a plasma display panel according to an aspect of the present invention for achieving the technical problem is a driving method of a plasma display panel including a plurality of first electrodes and a second electrode,
상기 플라즈마 디스플레이 패널의 방전 가스에는 크세논(Xe)이 포함되어 있고, 상기 크세논의 함량이 5%이상 10%이하일 때, 유지 구간에서 상기 제1 전극에 인가되는 첫 번째 유지 방전 펄스의 폭을 8㎲이상 12㎲ 이하로 설정한다. The discharge gas of the plasma display panel includes xenon (Xe), and when the content of the xenon is 5% or more and 10% or less, the width of the first sustain discharge pulse applied to the first electrode in the sustain period is 8 ㎲. Up to 12 ms is set.
또한, 상기 크세논의 함량이 10%이상 20%이하일 때, 유지 구간에서 상기 제1 전극에 인가되는 첫 번째 유지 방전 펄스의 폭이 10㎲이상 16㎲ 이하인 것이 바람직하다.In addition, when the content of the xenon is 10% or more and 20% or less, it is preferable that the width of the first sustain discharge pulse applied to the first electrode in the sustain period is 10 ms or more and 16 ms or less.
또한, 상기 크세논의 함량이 20%이상일 때, 유지 구간에서 상기 제1 전극에 인가되는 첫 번째 유지 방전 펄스의 폭이 13㎲이상 18㎲ 이하인 것이 바람직하다.In addition, when the content of xenon is 20% or more, it is preferable that the width of the first sustain discharge pulse applied to the first electrode in the sustain period is 13 kW or more and 18 kW or less.
아래에서는 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였다. 명세서 전체를 통하여 유사한 부분에 대해서는 동일한 도면 부호를 붙였다. DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.
앞서 기술한 바와 같이 PDP는 방전 가스 중 Xe의 함량이 높아질수록 방전 개시 전압도 높아지며, 방전 딜레이도 증가된다. 그러므로 본 발명은 Xe의 비율에 따라 증가하는 방전 개시전압 및 방전 딜레이에 대응되도록 유지방전 기간의 첫 펄스의 폭을 각각 다르게 설정한다. As described above, the higher the content of Xe in the discharge gas is, the higher the discharge start voltage is and the discharge delay increases. Therefore, the present invention sets the width of the first pulse of the sustain discharge period differently so as to correspond to the discharge start voltage and the discharge delay which increase with the ratio of Xe.
먼저, Xe 함량에 따라 바람직한 첫 번째 유지방전의 펄스 폭을 구하기 위하여 Xe의 함량에 따라 첫 번째 유지방전 펄스의 폭을 변화시켜가면서 두 번째 유지방전의 안정도(light intensity)를 측정하였으며, 그 결과는 도 5a와 같다. 도 5b는 도 5a의 결과를 그래프로 나타낸 것이다.First, the light intensity of the second sustain discharge was measured by varying the width of the first sustain discharge pulse according to the content of Xe in order to obtain the desired pulse width of the first sustain discharge according to the Xe content. Same as FIG. 5A. FIG. 5B graphically illustrates the results of FIG. 5A.
한편, 도 6은 위의 결과를 토대로 Xe의 함량에 따라 두 번째 유지방전을 안정적으로 일으키기 위한 첫 번째 유지방전 펄스의 폭의 바람직한 범위를 나타낸 것이다.On the other hand, Figure 6 shows the preferred range of the width of the first sustain discharge pulse to stably cause the second sustain discharge based on the content of Xe based on the above results.
도 5a, 도 5b, 및 도 6에 도시한 바와 같이, 두 번째 유지방전이 안정적으로 일어나기 위해서는 Xe의 함량이 높아질수록 첫 번째 유지방전 펄스 폭도 커야 한다. 5A, 5B, and 6, in order for the second sustain discharge to occur stably, the first sustain discharge pulse width should be larger as the content of Xe increases.
또한, 위의 결과를 통하여 알 수 있듯이, 본 발명의 실시예에 따른 플라즈마 디스플레이 패널은 Xe의 비율이 5~10%, 10~20%, 20% 이상일 때 각각 첫 번째 유지방전 펄스의 폭을 8.0~12.0, 10.0~16.0, 13.0~18.0으로 설정하는 것이 바람직하다. 이와 같이 하면, 두 번째 유지방전을 안정적으로 일으킬 수 있다.In addition, as can be seen from the above results, in the plasma display panel according to the embodiment of the present invention, when the ratio of Xe is 5-10%, 10-20%, 20% or more, the width of the first sustain discharge pulse is 8.0. It is preferable to set to -12.0, 10.0-16.0, and 13.0-18.0. In this way, a second sustain discharge can be stably generated.
이상에서 본 발명의 바람직한 실시예에 대하여 상세하게 설명하였지만 본 발명은 이에 한정되는 것은 아니며, 그 외의 다양한 변경이나 변형이 가능하다. Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.
이상에서와 같이 본 발명에 따르면 PDP 구동파형의 유지 구간에서 첫 번째 유지방전 펄스의 폭을 방전가스 내의 Xe의 비율에 따라 각각 다르게 설정함으로써, 고효율의 PDP에서도 두 번째 유지방전을 안정적으로 일으킬 수 있다. As described above, according to the present invention, by setting the width of the first sustain discharge pulse differently according to the ratio of Xe in the discharge gas in the sustain section of the PDP driving waveform, the second sustain discharge can be stably generated even in a high efficiency PDP. .
도 1은 교류형 플라즈마 디스플레이 패널의 일부 사시도이다. 1 is a partial perspective view of an AC plasma display panel.
도 2는 플라즈마 디스플레이 패널의 전극 배열도이다. 2 is an arrangement diagram of electrodes of a plasma display panel.
도 3은 종래 플라즈마 디스플레이 패널의 구동파형도이다. 3 is a driving waveform diagram of a conventional plasma display panel.
도 4는 Xe의 비율에 따른 방전개시 전압을 나타낸 도이다.4 is a diagram illustrating a discharge start voltage according to the ratio of Xe.
도 5a 내지 도 5b는 Xe의 함량 및 첫 번째 유지방전 펄스의 폭에 따른 두 번째 유지방전의 안정도(light intensity)를 나타낸 도이다.5a to 5b are diagrams showing the light intensity of the second sustain discharge according to the content of Xe and the width of the first sustain discharge pulse.
도 6은 도 5의 결과를 토대로 Xe의 함량에 따라 두 번째 유지방전을 안정적으로 일으키기 위한 첫 번째 유지방전 펄스의 폭의 바람직한 범위를 나타낸 도이다.6 is a view showing a preferred range of the width of the first sustain discharge pulse to stably cause the second sustain discharge based on the content of Xe based on the result of FIG.
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