KR20080020230A - Organic electro luminescence display long life drive method - Google Patents
Organic electro luminescence display long life drive method Download PDFInfo
- Publication number
- KR20080020230A KR20080020230A KR1020060083431A KR20060083431A KR20080020230A KR 20080020230 A KR20080020230 A KR 20080020230A KR 1020060083431 A KR1020060083431 A KR 1020060083431A KR 20060083431 A KR20060083431 A KR 20060083431A KR 20080020230 A KR20080020230 A KR 20080020230A
- Authority
- KR
- South Korea
- Prior art keywords
- voltage
- organic
- driving
- long life
- display
- Prior art date
Links
Images
Classifications
-
- 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
- G09G3/30—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 electroluminescent panels
- G09G3/32—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3216—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 electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0278—Details of driving circuits arranged to drive both scan and data electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
Description
도1은 일반적인 유기이엘 디스플레이의 구조를 나타낸 회로도.1 is a circuit diagram showing the structure of a typical organic EL display.
도2는 유기이엘 디스플레이에 인가되는 종래의 전압 파형을 나타낸 타이밍도.2 is a timing diagram showing a conventional voltage waveform applied to an organic EL display.
도3은 도2에 나타낸 전압 파형의 크기에 따른 유기이엘 화소의 휘도 변화를 나타낸 그래프.3 is a graph showing a change in luminance of the organic EL pixel according to the magnitude of the voltage waveform shown in FIG.
도4는 본 발명에 따른 구동방법에 의한 구동파형을 나타낸 타이밍도.4 is a timing diagram showing a driving waveform by the driving method according to the present invention;
도5는 본 발명에 따른 구동방법에 의한 구동파형을 발생시키는 일실시예를 나타낸 테브닌 등가회로도.Figure 5 is a Thevenin equivalent circuit diagram showing an embodiment for generating a drive waveform by the driving method according to the present invention.
본 발명은 유기이엘 디스플레이의 장수명 구동방법에 관한 것으로서, 더욱 상세하게는 무수히 많은 유기이엘 화소들로 이루어진 유기이엘 디스플레이 시트에 공급되는 전압 파형의 형태를 조절하여 디스플레이의 사용수명을 연장시킬 수 있는 유기이엘 디스플레이의 장수명 구동방법에 관한 것이다. The present invention relates to a long life driving method of an organic EL display. More particularly, the present invention relates to an organic EL display sheet which can extend a service life of a display by controlling a shape of a voltage waveform supplied to an organic EL display sheet composed of numerous organic EL pixels. It relates to a long life driving method of EL display.
일반적으로 디스플레이 장치에는 빛이 발생되는 조명수단이 구비되어 있다.In general, the display device is provided with lighting means for generating light.
이러한 조명수단은 별도의 전원을 공급받아 점등되는 것이며, 상기 조명수단에서 발생된 빛은 그 전면에 설치된 표시수단(엘이디 패널 등)의 후방에서 전방으로 조사되도록 되어 있다.The lighting means is turned on by receiving a separate power, and the light generated from the lighting means is irradiated to the front from the rear of the display means (LED panel, etc.) installed on the front.
이와 같이 빛이 발생되지 않는 표시수단에는 별도의 조명수단이 반드시 설치하여야 한다.As such, a separate lighting means must be installed on the display means which does not generate light.
한편, 최근에는 별도의 조명수단을 사용하지 않고도 사용할 수 있도록 자체 발광 가능한 유기이엘 디스플레이가 개발되어 사용되고 있다.On the other hand, recently, an organic EL display capable of emitting light has been developed and used so that it can be used without using a separate lighting means.
상기 유기이엘 디스플레이는 무수히 많은 유기이엘 화소들로 구성되어 있으며, 이들 각각은 가로 주사전극과 세로 데이터전극에 연결되어 있다. The organic EL display is composed of numerous organic EL pixels, each of which is connected to a horizontal scan electrode and a vertical data electrode.
유기이엘 화소의 발광 또는 소광은 주사전극에 인가된 주사전압과 데이터전극에 인가된 데이터전압에 따라 결정된다. The emission or quenching of the organic EL pixel is determined according to the scan voltage applied to the scan electrode and the data voltage applied to the data electrode.
즉, 그 동작을 설명하면 다음과 같다.That is, the operation is as follows.
수직 동기신호에 따라 프레임이 시작되면 도1에 나타낸 것과 같이 첫 번째 주사전극은 선택되어 비선택 주사전압(VsH)(10V)에서 선택 주사전압(VsL)(0V)으로 순간적으로 변화되어 매우 큰 전류가 흐르다가 작은 전류로 안정된다. When the frame is started according to the vertical synchronization signal, as shown in FIG. 1, the first scan electrode is selected and is instantaneously changed from the unselected scan voltage V sH (10V) to the selected scan voltage V sL (0 V). Large current flows and then stabilizes with small current.
그러는 동안에 데이터전극들 역시 발광 또는 소광 데이터에 따라 발광전압(VdH)(10V) 또는 소광전압(VdL)(0V)을 순간적으로 공급하기 때문에 매우 큰 전류가 흐르고 유기 이엘소자는 피로가 누적된다. In the meantime, the data electrodes also instantaneously supply the emission voltage V dH (10 V) or the extinction voltage V dL (0 V) according to the emission or quenching data, so a very large current flows and the organic EL element accumulates fatigue. .
주사전극이 0V를 유지하고 있는 상태에서 데이터전극에 10V를 인가하면 유기이엘 화소는 10V가 공급되어 빛이 발생되고, 데이터전극에 0V를 인가하면 유기이엘 화소는 0V가 공급되어 소광한다. When 10 V is applied to the data electrode while the scan electrode is maintained at 0 V, 10 V is supplied to the organic EL pixel and light is generated. When 0 V is applied to the data electrode, 0 V is supplied to the organic EL pixel to quench the light.
선택되지 않은 주사전극 화소들은 비선택 주사전압 10V를 유지하고 데이터전극에 10V 또는 0V를 공급하기 때문에 유기이엘 화소의 두 전극 전압은 0V가 되거나 -10V가 되어 항상 소광 상태를 유지하게 된다.Since the unselected scan electrode pixels maintain the unselected scan voltage of 10 V and supply 10 V or 0 V to the data electrodes, the two electrode voltages of the organic EL pixel become 0 V or −10 V to always maintain the quenching state.
첫 번째 주사전극의 선택기간이 끝나면 주사전압이 0V에서 다시 처음의 10V로 순간적으로 증가되어 매우 큰 전류가 흐르고 유기이엘 소자는 피로가 누적된다.At the end of the selection period of the first scan electrode, the scan voltage is instantaneously increased from 0V back to the first 10V, a very large current flows, and the organic EL element accumulates fatigue.
화소에 인가되는 구동전압은 주사전극과 데이터전극에 인가된 전압에 의해 결정되며, 선택기간과 비선택기간을 합하여 시간 축으로 표현하면 도2와 같은 양의 전압과 음의 전압 크기가 비슷한 구형파 형태의 전압이 된다. The driving voltage applied to the pixel is determined by the voltages applied to the scan electrode and the data electrode, and when the sum of the selection period and the non-selection period is expressed on the time axis, a square wave shape similar in magnitude to the positive voltage and the negative voltage as shown in FIG. Becomes the voltage of.
두 번째 주사전극이 선택되면 두 번째 주사전극 역시 10V에서 0V로 순간적으로 감소하여 매우 큰 전류가 흐르다가 작은 전류로 안정되며, 화소들은 데이터전극에 인가된 전압 10V 또는 0V에 따라 발광하거나 소광한다. When the second scan electrode is selected, the second scan electrode is also instantaneously reduced from 10V to 0V so that a very large current flows and stabilizes with a small current. The pixels emit or quench according to a voltage of 10V or 0V applied to the data electrode.
이와 같은 방법으로 마지막 주사전극까지 주사가 끝나면 1 프레임이 완료되고 다시 처음 주사전극으로 돌아가서 주사를 반복하게 된다. In this way, when the scan is completed to the last scan electrode, one frame is completed, and the scan is returned to the first scan electrode again.
프레임을 반복하는 동안에 주사전극은 비선택 전압에서 선택전압, 선택전압에서 비선택 전압으로 순간적인 변화를 반복하고, 데이터 전극 역시 소광전압에서 발광전압으로 또는 발광전압에서 소광전압으로 순간적인 변화를 반복하여 유기 이엘소자는 매우 큰 전류가 흐르고, 피로가 누적되어 디스플레이의 수명시간을 단축 시키는 역할을 한다. During the repetition of the frame, the scan electrode repeats the instantaneous change from the unselected voltage to the select voltage and the select voltage to the unselected voltage, and the data electrode repeats the instantaneous change from the extinction voltage to the emission voltage or from the emission voltage to the extinction voltage. Therefore, the organic EL element plays a role of shortening display life time due to very large current flow and fatigue accumulation.
현재 주사전극과 데이터전극에 인가되는 주사전압(VsH)과 발광전압(VdH)은 각각 10V 내외를 사용하고 서로 비슷한 값을 갖기 때문에 위에서 설명한 10V는 대표적인 전압이다.10V described above is a representative voltage because the scan voltage V sH and the light emission voltage V dH applied to the scan electrode and the data electrode are about 10 V and have similar values.
수동 유기이엘 디스플레이의 밝기는 선택시간 내에서 구동펄스의 펄스폭을 조절(pulse width modulation, PWM)하거나, 구동펄스의 크기를 조절(pulse amplitude modulation, PAM)하여 조정한다.The brightness of the passive organic EL display is adjusted by adjusting the pulse width modulation (PWM) of the driving pulse or the amplitude of the driving pulse (PAM) within the selection time.
한편, 유기이엘 화소는 내부에 커패시터와 저항 성분을 동시에 다 가지고 있다. 또한 구동전압은 도2에 나타낸 바와 같이 양과 음의 전압 크기가 비슷한 구형파 형태의 전압이다. 따라서, 종래에는 구동전압이 순간적으로 변하게 되면 유기이엘 소자의 내부 커패시터에 의해 매우 큰 전류가 흐르고 피로가 누적되어 유기이엘 소자의 수명시간이 짧아지게 되는 문제점이 있었다.On the other hand, the organic EL pixel has both a capacitor and a resistor at the same time. In addition, the driving voltage is a square wave voltage similar in magnitude to the positive and negative voltage as shown in FIG. Therefore, in the related art, when the driving voltage changes instantaneously, a very large current flows due to an internal capacitor of the organic EL element and fatigue accumulates, thereby shortening the life time of the organic EL element.
본 발명은 상기한 문제점을 해결하기 위하여 발명한 것으로서, 그 목적은 구동전압을 서서히 변화시켜 흐르는 전류를 감소시키고, 피로를 줄여 유기이엘 디스플레이의 수명을 향상시키기 위하여 순간적인 전압변화를 흡수시킬 수 있는 커패시터를 이용하는 것으로서, 데이터 구동 집적회로(Integrated Circuit, IC) 또는 주사 구동 IC의 출력 부분에 유기이엘 소자와 병렬로 완화 커패시터(relaxation capacitor)를 연결하여 순간적으로 급변하는 공급전압을 흡수하여 전압기울기를 조절할 수 있는 유기이엘 디스플레이의 장수명 구동방법을 제공함에 있다.The present invention has been invented to solve the above problems, the object of which is to gradually change the driving voltage to reduce the current flowing, to reduce the fatigue can absorb the instantaneous voltage change to improve the life of the organic EL display By using a capacitor, a relaxation capacitor is connected in parallel with an organic EL element to an output portion of a data driving integrated circuit (IC) or a scan driving IC to absorb a sudden change in supply voltage, thereby reducing the voltage gradient. It is to provide a long life driving method of the adjustable organic EL display.
상기 목적을 달성하기 위한 본 발명의 특징적인 구성을 설명하면 다음과 같다.Referring to the characteristic configuration of the present invention for achieving the above object is as follows.
본 발명의 유기이엘 디스플레이의 장수명 구동방법은 수동 유기이엘 디스플레이에 설치된 화소를 펄스폭조절(pulse width modulation, PWM) 또는 펄스높이조절(pulse amplitude modulation, PAM) 구동 시 화소를 소광에서 발광 또는 발광에서 소광으로 절환 할 때 유기이엘 소자와 병렬로 연결된 완화 커패시터(relaxation capacitor)에서 순간적으로 급변하는 공급전압을 흡수하여 전압기울기를 완만하게 조절하여서 된 것이다.The long life driving method of the organic EL display according to the present invention is characterized in that the pixel is disposed in the quenched light emission or the light emission during the pulse width modulation (PWM) or pulse amplitude modulation (PAM) driving of the pixel installed in the passive organic EL display. When switching to quenching, the voltage gradient is slowly adjusted by absorbing the rapidly changing supply voltage in a relaxation capacitor connected in parallel with the organic EL element.
이와 같은 특징을 갖는 본 발명을 상세하게 설명하면 다음과 같다. Referring to the present invention having such characteristics in detail as follows.
도4는 본 발명에 따른 구동방법에 의한 구동파형을 나타낸 타이밍도이고, 도5는 본 발명에 따른 구동방법에 의한 구동파형을 발생시키는 일실시예를 나타낸 테브닌 등가회로도이다.4 is a timing diagram showing a driving waveform by the driving method according to the present invention, Figure 5 is a Thevenin equivalent circuit diagram showing an embodiment of generating a driving waveform by the driving method according to the present invention.
여기에서 참조되는 바와 같이 유기이엘 소자는 내부에 커패시터와 저항을 가지고 있기 때문에 구동전압이 변화되면 전압기울기에 비례하는 전류가 흐른다. 또한 커패시터에 흐르는 전류는 수학식1과 같이 표현된다. As referred to herein, since the organic EL element has a capacitor and a resistor therein, a current proportional to the voltage gradient flows when the driving voltage changes. In addition, the current flowing through the capacitor is represented by Equation (1).
[수학식1] [Equation 1]
상기 수학식1은 구동전압이 순간적으로 변화되면 매우 큰 전류가 흐르고, 유 기이엘 소자는 피로가 발생되어 수명시간이 짧아질 수 있음을 나타낸다. 이를 해결하기 위해서는 순간적인 전압변화를 흡수시킬 수 있는 커패시터를 이용하는 것이다.
데이터 구동 IC 또는 주사 구동 IC의 출력 부분에 유기이엘 소자와 병렬로 완화 커패시터(relaxation capacitor, CR)를 연결하면 순간적으로 변화하는 공급전압을 서서히 변화시킬 수 있다. When a relaxation capacitor (C R ) is connected in parallel with the organic EL element to the output of the data driver IC or the scan driver IC, it is possible to gradually change the supply voltage that is changed momentarily.
또한 완화 커패시터(CR) 용량을 조절하면 전압기울기도 조절할 수 있다. You can also adjust the voltage slope by adjusting the relaxation capacitor (C R ) capacitance.
완화 커패시터가 연결된 상태에서의 유기이엘 디스플레이는 다음과 같이 동작한다.With the relaxation capacitor connected, the OLED display works as follows.
수직 동기신호에 따라 프레임이 시작되면 주사 구동 IC 내부의 첫 번째 주사전극은 선택되어 비선택 주사전압 VsH(10V)에서 선택 주사전압 VsL(0V)으로 순간적으로 변화된다. When a frame is to start scanning the first scan electrode driving IC of the internal is selected is instantaneously changed to the selection scan voltage V sL (0V) in the non-scanning selection voltage V sH (10V) in accordance with the vertical synchronizing signal.
그러나 완화 커패시터는 순간적인 공급전압 변화를 방전되면서 변화시키기 때문에 구동전압을 서서히 감소시킨다. 그러는 동안에 전류도 서서히 감소하여 유기 이엘소자의 피로를 감소시켜준다. 또한 데이터전극들은 발광 또는 소광 데이터에 따라 발광전압(VdH) 또는 소광전압(VdL)을 공급한다. However, the relaxation capacitor gradually decreases the driving voltage because it changes the supply voltage momentarily with discharge. In the meantime, the current gradually decreases, reducing the fatigue of the organic EL element. In addition, the data electrodes supply the light emission voltage V dH or the extinction voltage V dL according to the light emission or extinction data.
주사전극이 0V를 유지하고 있고 데이터전극에 발광전압을 순간적으로 공급하면 데이터전극에 연결된 완화 커패시터가 전압을 충전시키면서 상승시키기 때문에 구동전압은 완만히 증가하고 흐르는 전류를 감소시켜 유기이엘소자의 피로를 덜어 준다. 데이터전극에 소광전압(VdL)을 인가하면 0V를 그대로 유지하기 때문에 유기이엘 화소는 전류가 흐르지 않고 소광한다.If the scan electrode maintains 0V and the light emitting voltage is supplied to the data electrode momentarily, the relaxation capacitor connected to the data electrode increases while charging the voltage, so that the driving voltage gradually increases and the current flow decreases to reduce the fatigue of the organic EL element. give. When the extinction voltage V dL is applied to the data electrode, 0 V is maintained as it is, so that the organic EL pixel is extinguished without current.
선택되지 않은 주사전극 화소들은 양의 주사전압 VsH(10V)을 유지하고 데이터전극에 발광전압(VdH) 또는 소광전압(VdL)을 공급하기 때문에 유기이엘 화소의 두 전극 전압은 VdH - VsH(0V)가 되거나 VdL - VsH(-10V)가 되어 항상 소광 상태를 유지하게 된다. Since the unselected scan electrode pixels maintain a positive scan voltage V sH (10V) and supply a light emission voltage (V dH ) or an extinction voltage (V dL ) to the data electrode, the two electrode voltages of the organic EL pixel are V dH −. It becomes V sH (0V) or V dL -V sH (-10V) and always keeps extinction.
그러나 이때에도 0V가 되거나 순간적으로 -10V가 인가될 수도 있지만, 데이터 전극에 연결된 완화 커패시터가 공급전압을 흡수하여 구동전압과 흐르는 전류를 서서히 감소시키고 피로를 감소시켜 준다. At this time, however, 0V or -10V may be instantaneously applied, but a relaxation capacitor connected to the data electrode absorbs the supply voltage, gradually reducing the driving voltage and the current flowing and reducing fatigue.
첫 번째 주사전극의 선택기간이 끝나면 선택 주사전압(VsL)(0V)에서 다시 처음의 비선택 주사전압(VsH)(10V)으로 증가된다. The first end of the selection period of the second scan electrodes is increased to a selected scanning voltage (V sL) (0V) the first non-selected scanning voltage (V sH) (10V) in the back.
그러나 이때에도 완화 커패시터가 공급전압을 충전시키면서 증가시키기 때문에 과도한 전류는 흐르지 않는다. 선택기간과 비선택기간을 합하여 장수명 구동 전압파형을 나타내면 도4와 같다. However, at this time too much current does not flow because the relaxation capacitor increases while charging the supply voltage. The long-life driving voltage waveforms in which the selection period and the non-selection period are summed are shown in FIG. 4.
이와 같은 방법으로 마지막 주사전극까지 주사가 끝나면 1 프레임이 완료되어 다시 처음의 주사전극으로 돌아가서 주사를 반복하게 된다. In this way, when the scan is completed to the last scan electrode, one frame is completed, and the scan returns to the first scan electrode and repeats the scan.
이와 같이 본 발명은 유기이엘 화소에 공급되는 구동파형의 상승시간과 하강 시간을 조절하여 전류가 적게 흐르게 하고 상기 유기이엘 소자의 피로를 감소시키게 되므로 사용수명을 연장시킬 수 있는 특유의 효과가 있다.As such, the present invention adjusts the rise time and the fall time of the driving waveform supplied to the organic EL pixel so that the electric current flows less and the fatigue of the organic EL element is reduced, thereby extending the service life.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060083431A KR100845185B1 (en) | 2006-08-31 | 2006-08-31 | Drive Method for Extending Life of a Passive Matrix Organic Electro Luminescence Display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060083431A KR100845185B1 (en) | 2006-08-31 | 2006-08-31 | Drive Method for Extending Life of a Passive Matrix Organic Electro Luminescence Display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20080020230A true KR20080020230A (en) | 2008-03-05 |
| KR100845185B1 KR100845185B1 (en) | 2008-07-10 |
Family
ID=39395286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020060083431A KR100845185B1 (en) | 2006-08-31 | 2006-08-31 | Drive Method for Extending Life of a Passive Matrix Organic Electro Luminescence Display |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100845185B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268754A (en) * | 2013-05-28 | 2013-08-28 | 上海中科高等研究院 | Ascending and descending time control circuit and AMOLED drive control signal producing circuit |
| US9013375B2 (en) | 2011-03-16 | 2015-04-21 | Samsung Display Co., Ltd. | Organic light-emitting display apparatus and method of driving the same |
| CN108848600A (en) * | 2018-09-25 | 2018-11-20 | 开源集成电路(苏州)有限公司 | PWM output method, system, device and storage medium applied to LED matrix |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4604455B2 (en) * | 2003-04-08 | 2011-01-05 | セイコーエプソン株式会社 | Electro-optical device, driving method of electro-optical device, and electronic apparatus |
| KR20050032319A (en) * | 2003-10-01 | 2005-04-07 | 삼성에스디아이 주식회사 | Field emission display and deriving method thereof |
-
2006
- 2006-08-31 KR KR1020060083431A patent/KR100845185B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9013375B2 (en) | 2011-03-16 | 2015-04-21 | Samsung Display Co., Ltd. | Organic light-emitting display apparatus and method of driving the same |
| CN103268754A (en) * | 2013-05-28 | 2013-08-28 | 上海中科高等研究院 | Ascending and descending time control circuit and AMOLED drive control signal producing circuit |
| CN108848600A (en) * | 2018-09-25 | 2018-11-20 | 开源集成电路(苏州)有限公司 | PWM output method, system, device and storage medium applied to LED matrix |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100845185B1 (en) | 2008-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9673705B2 (en) | Power supply apparatus and display device including the same | |
| US20030043090A1 (en) | Apparatus and method for driving luminescent display panel | |
| EP1486943A2 (en) | Drive device and drive method for light emitting display panel | |
| WO2000019401A1 (en) | Analog active matrix emissive display | |
| US9390647B2 (en) | Pulse width correction for LED display driver | |
| JP2003288053A (en) | Driving method of luminous display panel and organic el display device | |
| US6771235B2 (en) | Apparatus and method for driving display panel | |
| JP4406372B2 (en) | Display device and control method thereof | |
| JP3864145B2 (en) | Driving method of organic EL display device | |
| JP3882995B2 (en) | Driving method of light emitting display panel and organic EL display device | |
| JP2006261160A (en) | Inductive led driver | |
| KR100797749B1 (en) | Organic Light Emitting Display Device and Driving Circuit Applying Pulse Amplitude ModulationPAM Driving Method and Pulse Width ModulationPWM Driving Method | |
| JP2004184643A (en) | Method for driving organic el display device | |
| JP2000206935A (en) | Capacitive light emitting element display device and its manufacture | |
| KR100845185B1 (en) | Drive Method for Extending Life of a Passive Matrix Organic Electro Luminescence Display | |
| JP4936340B2 (en) | Display device and driving method of display device | |
| KR20040086181A (en) | Drive method and drive device for light emitting display panel | |
| KR100732851B1 (en) | Dc/dc converter and organic light emitting display using the same | |
| JP2000004048A (en) | Battery drive circuit for light-emitting element | |
| KR100835888B1 (en) | Organic Electro Luminescence Display Efficient Drive Method | |
| KR101620554B1 (en) | Set of light emissive diode elements for a backlight device and backlight display | |
| KR102103798B1 (en) | Method of driving light-source, light-source apparatus for performing the method and display apparatus having the light-source apparatus | |
| JP2010123644A (en) | Lighting apparatus using light emitting diodes | |
| TWI298472B (en) | Pixel driving circuit and method thereof | |
| JPWO2012153594A1 (en) | Lighting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E90F | Notification of reason for final refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| LAPS | Lapse due to unpaid annual fee |