WO2020173003A1 - 显示器驱动电路及显示器驱动方法 - Google Patents

显示器驱动电路及显示器驱动方法 Download PDF

Info

Publication number
WO2020173003A1
WO2020173003A1 PCT/CN2019/087450 CN2019087450W WO2020173003A1 WO 2020173003 A1 WO2020173003 A1 WO 2020173003A1 CN 2019087450 W CN2019087450 W CN 2019087450W WO 2020173003 A1 WO2020173003 A1 WO 2020173003A1
Authority
WO
WIPO (PCT)
Prior art keywords
transistor
emitting diode
organic light
light emitting
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/087450
Other languages
English (en)
French (fr)
Inventor
李新吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Publication of WO2020173003A1 publication Critical patent/WO2020173003A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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]
    • 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]
    • G09G3/3225—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 an active matrix
    • G09G3/3258—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 an active matrix with pixel circuitry controlling the voltage across the light-emitting element

Definitions

  • the present invention relates to the field of display technology, in particular to a display driving circuit and a driving method.
  • OLED displays have the advantages of wide color gamut, high contrast, high brightness, fast response, low energy consumption, flexibility, etc., so they have gradually become a key technology in the development of the display field. Due to the above advantages, compared with thin film transistor (TFT) displays, OLED displays are more suitable for preparing large-size, thin, flexible, transparent and double-sided displays. Among them, Active-Matrix Organic Light Emitting Diode (Active-Matrix Organic Light-Emitting Diode (AMOLED) has the advantage of being thinner than ordinary thin-film transistors, so AMOLED has become a key technology for organic light-emitting diode applications.
  • Active-Matrix Organic Light Emitting Diode Active-Matrix Organic Light-Emitting Diode
  • AMOLED Active-Matrix Organic Light-Emitting Diode
  • AMOLED has the advantage of being thinner than ordinary thin-film transistors, so AMOLED has become a key technology for organic light-emitting dio
  • AMOLED can be divided into three categories according to the driving type: digital, current and voltage.
  • the digital driving method achieves gray scale by using Thin Film Transistor (TFT) as a switch to control the driving time.
  • TFT Thin Film Transistor
  • the advantage of the digital driving method is that it does not need to compensate for the uniformity of pixels, but its operating frequency varies with the display size It increases and rises, so it is not suitable for large-size display applications.
  • the current driving method achieves gray scale by directly supplying different currents to the driving transistor. Current driving has better compensation for TFT uniformity and voltage degradation (IR Drop), but when writing low gray scale signals, Smaller driving current requires longer charging time on data lines with parasitic capacitance, resulting in too long data signal writing time.
  • the display driving circuit 10 for driving an organic light emitting diode OLED is composed of two thin film transistors (T11 and T12) and a storage capacitor C1.
  • the thin film transistor T11 is a switching transistor
  • the gate of the thin film transistor T11 is connected to the scan line Gn of the nth stage to access the scan signal
  • the source is connected to the data line Data to access the data signal.
  • the thin film transistor T11 turns on the data line Data.
  • the thin film transistor T12 is a driving transistor.
  • the voltage provided to the organic light emitting diode OLED is controlled by the thin film transistor T12.
  • the source of the thin film transistor T12 is connected to the voltage source ELVDD, and the gate of the thin film transistor T12 is connected to the drain of the thin film transistor T11.
  • the thin film transistor T11 turns on the data signal Data, and the thin film transistor T12 will also be turned on, so the organic light emitting diode OLED will emit light.
  • the 2T1C driving circuit will make the display brightness uneven, and the wiring of the circuit will cause the aperture ratio of the pixel to be low. Therefore, a display driving circuit is needed to solve the problem of the brightness in the voltage driving circuit. The problem of unevenness and low aperture ratio.
  • the present invention provides a display driving circuit that includes a scan line, a data line, a first transistor, a storage capacitor, a second transistor, an organic light emitting diode, and a compensation transistor.
  • the current level scan line is used to transmit the current level scan signal.
  • the data line is used to transmit data signals.
  • the gate of the first transistor is connected to the scan line of the current level, and the source of the first transistor is connected to the data line.
  • the first end of the storage capacitor is connected to the upper-level scan line, and the second end of the storage capacitor is connected to the drain of the first transistor.
  • the gate of the second transistor is connected to the drain of the first transistor and the second end of the storage capacitor, and the source of the second transistor is connected to a high-level signal.
  • the anode of the organic light emitting diode is connected to the drain of the second transistor.
  • the gate of the compensation transistor is connected to the control signal, the source of the compensation transistor is connected to the sensing signal, and the drain of the compensation transistor is connected to the anode of the organic light emitting diode.
  • the control signal controls the on and off of the compensation transistor according to the level of the anode of the organic light emitting diode, and the display driving circuit adjusts the voltage of the sensing signal according to the level of the anode of the organic light emitting diode .
  • the present invention also provides a display driving circuit including the scan line, the data line, the first transistor, the storage capacitor, the second transistor and the organic light emitting diode.
  • the current level scan line is used to transmit the current level scan signal.
  • the data line is used to transmit data signals.
  • the gate of the first transistor is connected to the scan line of the current level, and the source of the first transistor is connected to the data line.
  • the first end of the storage capacitor is connected to the upper-level scan line, and the second end of the storage capacitor is connected to the drain of the first transistor.
  • the gate of the second transistor is connected to the drain of the first transistor and the second end of the storage capacitor, and the source of the second transistor is connected to a high-level signal.
  • the anode of the organic light emitting diode is connected to the drain of the second transistor.
  • the display driving circuit includes a compensation transistor, and the anode of the organic light emitting diode is connected to the compensation transistor.
  • the gate of the compensation transistor is connected to the control signal
  • the source of the compensation transistor is connected to the sensing signal
  • the drain of the compensation transistor is connected to the anode of the organic light emitting diode.
  • control signal controls the on and off of the compensation transistor according to the level of the anode of the organic light emitting diode.
  • the display driving circuit adjusts the voltage level of the sensing signal according to the level of the anode of the organic light emitting diode.
  • the present invention also provides a display driving method, which is used in a display driving circuit having a scan line, a data line, a storage capacitor, a first transistor, a second transistor, and an organic light emitting diode.
  • the driving method includes that the gate of the first transistor receives a scan signal, the source of the first transistor receives a data signal, the drain of the first transistor is connected to the gate of the second transistor, the The source of the second transistor is connected to a high-level signal, and the drain of the second transistor is connected to the anode of the organic light emitting diode.
  • the first end of the storage capacitor is connected to the upper-level scan line, and the second end of the storage capacitor is connected to the drain of the first transistor.
  • the first transistor When the scan signal of the current level transmitted by the scan line of the current level is high, the first transistor conducts the data signal to the gate of the second transistor, and the second transistor conducts its source.
  • the connected high-level signal is conducted to the anode of the organic light emitting diode, so that the organic light emitting diode emits light.
  • the display driving circuit includes a compensation transistor, and the anode of the organic light emitting diode is connected to the compensation transistor.
  • the gate of the compensation transistor is connected to the control signal
  • the source of the compensation transistor is connected to the sensing signal
  • the drain of the compensation transistor is connected to the anode of the organic light emitting diode.
  • control signal controls the on and off of the compensation transistor according to the level of the anode of the organic light emitting diode.
  • the display driving circuit adjusts the voltage level of the sensing signal according to the level of the anode of the organic light emitting diode.
  • the advantage of the present invention is that the display driving circuit and method of the present invention can improve the uniformity of display brightness and at the same time increase the aperture ratio of display pixels.
  • Figure 1 shows a conventional 2T1C display drive circuit
  • Figure 2 shows the display driving circuit of the present invention
  • FIG. 3 shows a timing diagram of the display driving circuit of the present invention.
  • the display driving circuit 20 includes a compensation transistor T20, a first transistor T21, a second transistor T22, a storage capacitor C2, and an organic light emitting diode OLED.
  • the first transistor T21 is a switching transistor and the second transistor T22 is a driving transistor.
  • the gate of the first transistor T21 is connected to the n-th level scan line to access the scan signal, the data line Data connected to the source is to access the data signal, and the drain is connected to the gate of the second transistor T22.
  • the first transistor T21 When the scan signal connected to the gate of the first transistor T21 is at a high level, the first transistor T21 turns on the data signal connected to the source to the gate of the second transistor T22, making the source of the second transistor T22
  • the high level signal ELVDD connected to the electrode is turned on to the drain of the second transistor T22.
  • the anode of the organic light emitting diode OLED connected to the drain of the second transistor T22 is connected to the high-level signal ELVDD, so the organic light emitting diode OLED emits light.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种显示器驱动电路包含本级扫描线（Gn）、数据线（Data）、第一晶体管（T21）、存储电容（C2）、第二晶体管（T22）以及有机发光二极管（OLED）。本级扫描线（Gn）用来传输本级扫描信号。数据线（Data）用来传输数据信号。当本级扫描线（Gn）所传输的本级扫描信号为高电平时，第一晶体管（T21）将数据信号导通至第二晶体管（T22）的栅极，第二晶体管（T22）将高电平信号导通至有机发光二极管（OLED）的正极，使有机发光二极管（OLED）发光；该显示器驱动电路可以改善显示亮度的均匀性并提高显示像素的开口率。

Description

显示器驱动电路及显示器驱动方法 技术领域
本发明涉及显示技术领域，尤其是涉及显示器驱动电路及驱动方法。
 背景技术
有机发光二极管(Organic Light Emitting Diode, OLED)显示器具有色域广、对比度高、亮度高、反应快、耗能低、具柔软性等优点，因此逐渐成为显示领域发展的重点技术。因上述优点，与薄膜晶体管(Thin film transistor, TFT)显示器相比，OLED显示器更适合用于制备大尺寸、薄型、柔性、透明及双面显示的显示器。其中主动矩阵有机发光二极管(Active-Matrix Organic Light-Emitting Diode, AMOLED)相较于一般薄膜晶体管更具有厚度薄的优势，因此AMOLED成为有机发光二极管应用的重点技术。
AMOLED按照驱动类型可以划分为三大类：数字式、电流式和电压式。数字式驱动方法通过将薄膜晶体管（Thin Film Transistor, TFT）作为开关来控制驱动时间的方式来实现灰阶，数字式驱动方法的好处是不需补偿像素的均匀性，但是其工作频率随显示尺寸增大而上升，因此不适合大尺寸显示应用。电流式驱动方法是通过直接提供大小不同的电流给驱动晶体管的方式实现灰阶，电流式驱动具有较好的补偿TFT均匀性及电压衰退(IR Drop），但是在写入低灰阶信号时，较小的驱动电流对在具有寄生电容数据线上所需的充电时间较长，造成数据信号的写入时间过长，在大尺寸显示中数据线的寄生电容会更大，使得写入时间更长，因此电流式驱动也不适用于大尺寸显示。电压式驱动由驱动IC提供一个表示灰阶的电压信号，电压信号会在像素电路内部被转化为驱动晶体管的电流信号，以实现亮度灰阶，这种方法具有驱动速度快，实现简单的优点，适合驱动大尺寸面板，被业界广泛采用。
现有技术中的电压型驱动电路采用2T1C的像素电路结构，如图1所示，驱动有机发光二极管OLED的显示器驱动电路10是由两个薄膜晶体管(T11与T12)及一个存储电容C1所组成，薄膜晶体管T11为开关晶体管，薄膜晶体管T11的栅极连接第n级的扫描线Gn以接入扫描信号，源极连接数据线Data以接入数据信号，当栅极接收到高电平的扫描信号时，薄膜晶体管T11导通数据线Data。薄膜晶体管T12为驱动晶体管，提供给有机发光二极管OLED的电压由薄膜晶体管T12控制，薄膜晶体管T12的源极接入电压源ELVDD，薄膜晶体管T12的栅极与薄膜晶体管T11的漏极相连，因此当薄膜晶体管T11导通数据信号Data，薄膜晶体管T12也将被导通，因此有机发光二极管OLED便会发光。
 技术问题
然而2T1C的駆动电路会使得显示亮度不均匀，并且电路的走线会造成像素的开口率(aperture ratio)较低，因此，需要一种显示器驱动电路，来解决在电压型驱动电路中，亮度不均匀及开口率低的问题。
 技术解决方案
为解决上述问题，本发明提供一种显示器驱动电路包含本级扫描线、数据线、第一晶体管、存储电容、第二晶体管、有机发光二极管以及补偿晶体管。所述本级扫描线用来传输本级扫描信号。所述数据线用来传输数据信号。所述第一晶体管的栅极与所述本级扫描线连接，所述第一晶体管的源极与所述数据线连接。所述存储电容第一端与上一级扫描线连接，所述存储电容第二端与所述第一晶体管的漏极连接。所述第二晶体管的栅极与所述第一晶体管的漏极及所述存储电容的第二端连接，所述第二晶体管的源极连接高电平信号。所述有机发光二极管的正极与所述第二晶体管的漏极连接。所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极。其中所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止，所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
本发明另提供一种显示器驱动电路包含本级扫描线、数据线、第一晶体管、存储电容、第二晶体管以及有机发光二极管。所述本级扫描线用来传输本级扫描信号。所述数据线用来传输数据信号。所述第一晶体管的栅极与所述本级扫描线连接，所述第一晶体管的源极与所述数据线连接。所述存储电容第一端与上一级扫描线连接，所述存储电容第二端与所述第一晶体管的漏极连接。所述第二晶体管的栅极与所述第一晶体管的漏极及所述存储电容的第二端连接，所述第二晶体管的源极连接高电平信号。所述有机发光二极管的正极与所述第二晶体管的漏极连接。
较佳地，所述显示器驱动电路包含补偿晶体管，所述有机发光二极管的正极与所述补偿晶体管连接。
较佳地，所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极。
较佳地，所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止。
较佳地，所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
本发明还提供一显示器驱动方法，用于具有本级扫描线、数据线、存储电容、第一晶体管、第二晶体管以及有机发光二极管的显示器驱动电路。所述驱动方法包含所述第一晶体管的栅极接收扫描信号，所述第一晶体管的源极接收数据信号，所述第一晶体管的漏极与所述第二晶体管的栅极连接，所述第二晶体管的源极接入高电平信号，所述第二晶体管的漏极连接所述有机发光二极管的正极。所述存储电容第一端与上一级扫描线连接，所述存储电容第二端与所述第一晶体管的漏极连接。当所述本级扫描线所传输的本级扫描信号为高电平时，所述第一晶体管将所述数据信号导通至所述第二晶体管的栅极，所述第二晶体管将其源极接入的高电平信号导通至所述有机发光二极管的正极，使所述有机发光二极管发光。
较佳地，所述显示器驱动电路包含补偿晶体管，所述有机发光二极管的正极与所述补偿晶体管连接。
较佳地，所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极。
较佳地，所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止。
较佳地，所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
 有益效果
本发明的优点在于，利用本发明的显示器驱动电路及方法，可以改善显示亮度的均匀性，同时提高显示像素的开口率。
 附图说明
图1绘示现有2T1C的显示器驱动电路；
图2绘示本发明的显示器驱动电路；
图3绘示本发明显示器驱动电路的时序图。
 本发明的最佳实施方式
下面结合附图对本发明提供的显示面板及显示装置做详细说明。具体实施方式中的纵向、横向、上、下、左、右、前、后仅是为了便于描述各部件之间的相对关系，而非用来限定本发明的实施方式。显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参考图2，图2所示为本发明的显示器驱动电路。显示器驱动电路20包含一个补偿晶体管T20、第一晶体管T21、第二晶体管T22、存储电容C2以及一个有机发光二极管OLED，其中第一晶体管T21为开关晶体管，第二晶体管T22为驱动晶体管。第一晶体管T21的栅极与第n级扫描线连接以接入扫描信号，源极所连接的数据线Data以接入数据信号，漏极与第二晶体管T22的栅极连接。当第一晶体管T21的栅极所接入的扫描信号为高电平时，第一晶体管T21将源极所接入的数据信号导通至第二晶体管T22的栅极，使第二晶体管T22的源极所接入的高电平信号ELVDD导通至第二晶体管T22的漏极。如此一来，与第二晶体管T22的漏极相连的有机发光二极管OLED的正极便接入高电平信号ELVDD，因此有机发光二极管OLED便会发光。
在本发明的显示器驱动电路20中，存储电容C2的第一端与上一级的扫描线Gn-1连接，存储电容C2的第二端与第一晶体管T21的漏极及第二晶体管T22的栅极之间的节点Q连接。意即存储电容C2在执行上一级的扫描时开始充电。由于存储电容C2的第一端是与上一级的扫描线Gn-1连接，因此上一级的扫描线Gn-1可以作为存储电容C2其中一面的面积，因此可以节省存储电容C2所需的额外面积，使得像素的开口率也随之提高。
由于存储电容C2的第一端是与上一级的扫描线Gn-1连接，因此本发明的显示器驱动电路尚有补偿晶体管T20。补偿晶体管T20的栅极接入控制信号RD、源极接人感测信号Sense，补偿晶体管T20的漏极与第二晶体管T22的漏极及有机发光二极管OLED的正极连接。感测信号Sense针对有机发光二极管OLED的正极所需的电压差进行补偿，当有机发光二极管OLED正极的电压不足时，控制信号RD便输入高电平至补偿晶体管T20的栅极，使补偿晶体管T20传送对应的感测信号Sense至有机发光二极管OLED的正极进行电压补偿，避免存储电容C2放电过快使得驱动电压不稳造成有机发光二极管OLED闪烁。
图3为本发明显示器驱动电路的时序图，如图3所示，在一帧的显示画面中，分成驱动阶段A与维持阶段B，在驱动阶段A中，数据线Data的数据信号在驱动阶段A输出高电平。请一并参考图2，在图2中的扫描线Gn为高电平时，作为开关晶体管的第一晶体管T21便将数据信号导通至作为驱动晶体管的第二晶体管T22的栅极，因此有机发光二极管OLED的正极便会接入高电平信号ELVDD而发光。同时图2中的补偿晶体管T20的控制信号RD会接入高电平，因此补偿晶体管T20便会将感测信号Sense导通至有机发光二极管OLED的正极。感测信号Sense的电平可依据需求调整，通过本发明的显示器驱动电路，有机发光二极管OLED的正极便可接入所需的驱动电压大小，以维持显示面板的亮度均匀性。而在维持阶段B中，扫描信号、数据信号高电平信号ELVDD以及第二晶体管T22的控制信号与感测信号皆维持低电平至此帧结束。
由于本发明的显示器驱动电路中，存储电容C2的第一端与上一级的扫描线Gn-1连接，第二端与第一晶体管连接，因此当显示器驱动电路中具有M条扫描线时，扫描线开启的时间约为1/M，关闭的时间约为 (M-l) /M，M值愈大，扫描线开启的时间比例愈低，对第一晶体管T21栅极电压所造成的影响也愈小，因此本发明的显示器驱动电路可适用于高解析度的大尺寸面板。
利用本发明的显示器驱动电路，因存储电容设置在开关晶体管与上一级扫描线之间，因此上一级扫描线可作为存储电容的一部分，因此存储电容所需的额外面积便可缩小，藉此提升像素的开口率。同时本发明还具有补偿晶体管可以使有机发光二极管的亮度维持恒定，以提升显示面板的亮度均匀性。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (11)

  1. 一种显示器驱动电路，包含：
    本级扫描线，用来传输本级扫描信号；
    数据线，用来传输数据信号；
    第一晶体管，所述第一晶体管的栅极与所述本级扫描线连接，所述第一晶体管的源极与所述数据线连接；
    存储电容，具有第一端及第二端，所述第一端与上一级扫描线连接，所述第二端与所述第一晶体管的漏极连接；
    第二晶体管，所述第二晶体管的栅极与所述第一晶体管的漏极及所述存储电容的第二端连接，所述第二晶体管的源极连接高电平信号；以及
    有机发光二极管，具有正极及负极，所述有机发光二极管的正极与所述第二晶体管的漏极连接；以及
    补偿晶体管，所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极；
    其中所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止，所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
  2. 一种显示器驱动电路，包含：
    本级扫描线，用来传输本级扫描信号；
    数据线，用来传输数据信号；
    第一晶体管，所述第一晶体管的栅极与所述本级扫描线连接，所述第一晶体管的源极与所述数据线连接；
    存储电容，具有第一端及第二端，所述第一端与上一级扫描线连接，所述第二端与所述第一晶体管的漏极连接；
    第二晶体管，所述第二晶体管的栅极与所述第一晶体管的漏极及所述存储电容的第二端连接，所述第二晶体管的源极连接高电平信号；以及
    有机发光二极管，具有正极及负极，所述有机发光二极管的正极与所述第二晶体管的漏极连接。
  3. 如权利要求2所述的显示器驱动电路，其中所述显示器驱动电路包含补偿晶体管，所述有机发光二极管的正极与所述补偿晶体管连接。
  4. 如权利要求3所述的显示器驱动电路，其中所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极。
  5. 如权利要求4所述的显示器驱动电路，其中所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止。
  6. 如权利要求4所述的显示器驱动电路，其中所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
  7. 一种显示器驱动方法，用于具有本级扫描线、数据线、存储电容、第一晶体管、第二晶体管以及有机发光二极管的显示器驱动电路上，包含：
    所述第一晶体管的栅极接收扫描信号，所述第一晶体管的源极接收数据信号，所述第一晶体管的漏极与所述第二晶体管的栅极连接，所述第二晶体管的源极接入高电平信号，所述第二晶体管的漏极连接所述有机发光二极管的正极；
    所述存储电容第一端与上一级扫描线连接，所述存储电容第二端与所述第一晶体管的漏极连接；
    当所述本级扫描线所传输的本级扫描信号为高电平时，所述第一晶体管将所述数据信号导通至所述第二晶体管的栅极，所述第二晶体管将其源极接入的高电平信号导通至所述有机发光二极管的正极，使所述有机发光二极管发光。
  8. 如权利要求7述的显示器驱动方法，其中所述显示器驱动电路包含补偿晶体管，所述有机发光二极管的正极与所述补偿晶体管连接。
  9. 如权利要求8述的显示器驱动方法，其中所述补偿晶体管的栅极连接控制信号，所述补偿晶体管的源极连接感测信号，所述补偿晶体管的漏极连接所述有机发光二极管的正极。
  10. 如权利要求9述的显示器驱动方法，其中所述控制信号依据所述有机发光二极管正极的电平控制所述补偿晶体管的导通与截止。
  11. 如权利要求9述的显示器驱动方法，其中所述显示器驱动电路依据所述有机发光二极管正极的电平调整所述感测信号的电压大小。
PCT/CN2019/087450 2019-02-27 2019-05-17 显示器驱动电路及显示器驱动方法 Ceased WO2020173003A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910144971.6A CN109801597B (zh) 2019-02-27 2019-02-27 显示器驱动电路及显示器驱动方法
CN201910144971.6 2019-02-27

Publications (1)

Publication Number Publication Date
WO2020173003A1 true WO2020173003A1 (zh) 2020-09-03

Family

ID=66561309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/087450 Ceased WO2020173003A1 (zh) 2019-02-27 2019-05-17 显示器驱动电路及显示器驱动方法

Country Status (2)

Country Link
CN (1) CN109801597B (zh)
WO (1) WO2020173003A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110472606B (zh) 2019-08-21 2022-05-20 京东方科技集团股份有限公司 一种超声波识别模组、其驱动方法及显示装置
CN110706650A (zh) * 2019-09-17 2020-01-17 深圳市华星光电半导体显示技术有限公司 像素驱动电路

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101231821A (zh) * 2006-12-21 2008-07-30 三星Sdi株式会社 有机发光显示器及其驱动方法
US20100141645A1 (en) * 2008-12-05 2010-06-10 Samsung Mobile Display Co., Ltd. Organic light emitting display device and method of driving the same
CN102243839A (zh) * 2010-05-11 2011-11-16 三星移动显示器株式会社 有机发光显示器及其驱动方法
CN105336293A (zh) * 2014-08-06 2016-02-17 上海和辉光电有限公司 Oled像素电路
CN105702206A (zh) * 2016-03-04 2016-06-22 北京大学深圳研究生院 一种像素矩阵的外围补偿系统及其方法、显示系统
CN107039004A (zh) * 2017-06-08 2017-08-11 深圳市华星光电技术有限公司 Amoled显示面板的老化补偿方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8405585B2 (en) * 2008-01-04 2013-03-26 Chimei Innolux Corporation OLED display, information device, and method for displaying an image in OLED display
CN104021756B (zh) * 2014-05-29 2017-04-12 京东方科技集团股份有限公司 像素电路及其驱动方法、有机发光显示面板及显示装置
KR102168879B1 (ko) * 2014-07-10 2020-10-23 엘지디스플레이 주식회사 유기발광다이오드의 열화를 센싱할 수 있는 유기발광 표시장치
KR101676259B1 (ko) * 2014-10-01 2016-11-16 엘지디스플레이 주식회사 유기 발광 표시 장치
WO2018119650A1 (zh) * 2016-12-27 2018-07-05 深圳市柔宇科技有限公司 像素电路驱动方法、像素电路组及有机发光显示设备
CN106652911B (zh) * 2017-02-24 2019-03-12 深圳市华星光电半导体显示技术有限公司 Oled像素驱动电路及oled显示装置
CN107424567B (zh) * 2017-09-06 2019-12-24 深圳市华星光电半导体显示技术有限公司 Oled像素驱动电路及oled显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101231821A (zh) * 2006-12-21 2008-07-30 三星Sdi株式会社 有机发光显示器及其驱动方法
US20100141645A1 (en) * 2008-12-05 2010-06-10 Samsung Mobile Display Co., Ltd. Organic light emitting display device and method of driving the same
CN102243839A (zh) * 2010-05-11 2011-11-16 三星移动显示器株式会社 有机发光显示器及其驱动方法
CN105336293A (zh) * 2014-08-06 2016-02-17 上海和辉光电有限公司 Oled像素电路
CN105702206A (zh) * 2016-03-04 2016-06-22 北京大学深圳研究生院 一种像素矩阵的外围补偿系统及其方法、显示系统
CN107039004A (zh) * 2017-06-08 2017-08-11 深圳市华星光电技术有限公司 Amoled显示面板的老化补偿方法

Also Published As

Publication number Publication date
CN109801597B (zh) 2020-12-25
CN109801597A (zh) 2019-05-24

Similar Documents

Publication Publication Date Title
US11881164B2 (en) Pixel circuit and driving method thereof, and display panel
KR100858618B1 (ko) 유기전계발광 표시장치 및 그의 구동방법
US10930728B2 (en) Organic light-emitting diode display and method of manufacturing the same
US8941309B2 (en) Voltage-driven pixel circuit, driving method thereof and display panel
US9779658B2 (en) Pixel circuit, display panel and display device comprising the pixel circuit
CN109300436B (zh) Amoled像素驱动电路及驱动方法
US9548024B2 (en) Pixel driving circuit, driving method thereof and display apparatus
JP6201465B2 (ja) 表示装置、表示装置の駆動方法、及び、電子機器
WO2020233491A1 (zh) 像素电路及其驱动方法、阵列基板及显示装置
WO2019071724A1 (zh) Amoled显示装置及其驱动方法
US20090295772A1 (en) Pixel and organic light emitting display using the same
JP2012242838A (ja) 画素ユニット回路及びｏｌｅｄ表示装置
WO2016011711A1 (zh) 像素电路、像素电路的驱动方法和显示装置
KR20120015076A (ko) 화소 및 이를 이용한 유기전계발광 표시장치
CN105096826A (zh) 一种像素电路及其驱动方法、阵列基板、显示装置
CN105609050A (zh) 像素补偿电路及amoled显示装置
WO2017117983A1 (zh) 像素补偿电路及amoled显示装置
US20230206850A1 (en) Display device
CN106067291A (zh) 一种像素驱动电路及其驱动方法、显示装置
US9728133B2 (en) Pixel unit driving circuit, pixel unit driving method, pixel unit and display apparatus
CN114023261B (zh) 显示面板和显示装置
CN104282260B (zh) 显示装置、用于显示装置的驱动方法和电子设备
KR102723500B1 (ko) 표시 장치
US20230197013A1 (en) Display apparatus and method for operating the same
WO2016187991A1 (zh) 像素电路、驱动方法、有机电致发光显示面板及显示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19916688

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19916688

Country of ref document: EP

Kind code of ref document: A1