WO2017063228A1 - Amoled驱动方法 - Google Patents

Amoled驱动方法 Download PDF

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Publication number
WO2017063228A1
WO2017063228A1 PCT/CN2015/092937 CN2015092937W WO2017063228A1 WO 2017063228 A1 WO2017063228 A1 WO 2017063228A1 CN 2015092937 W CN2015092937 W CN 2015092937W WO 2017063228 A1 WO2017063228 A1 WO 2017063228A1
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Prior art keywords
driving
frame
amoled
organic light
signal
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English (en)
French (fr)
Inventor
温亦谦
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/960,199 priority Critical patent/US10096276B2/en
Publication of WO2017063228A1 publication Critical patent/WO2017063228A1/zh
Anticipated expiration legal-status Critical
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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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • 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
    • 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
    • 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2350/00—Solving problems of bandwidth in display systems
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant

Definitions

  • the present invention relates to the field of electronic display, and in particular to an AMOLED driving method.
  • organic light-emitting diodes Due to advances in process technology and materials for planar display, organic light-emitting diodes (AMOLED, Active-matrix) Organic light-emitting diode) is slowly becoming the mainstream of future displays.
  • AMOLED Active-matrix
  • FIG. 1 shows a prior art AMOLED driving circuit including a first semiconductor controllable switch T1, a second semiconductor controllable switch T2, a storage capacitor C1, and an organic light emitting diode D1.
  • the second semiconductor controllable switch T2 is connected at one end to the first control voltage VDD, the other end is connected to the anode of the organic light emitting diode D1, and the cathode of the organic light emitting diode D1 is connected to the second control voltage VSS, the first semiconductor is controllable
  • the source of the switch T1 is connected to the data driving signal SN of the AMOLED display panel
  • the gate of the first semiconductor controllable switch T1 is connected to the scan driving signal GN of the AMOLED display panel
  • the drain of the first semiconductor controllable switch T1 is connected to the a gate of the semiconductor controllable switch T2
  • the storage capacitor C1 is connected in series between the source and the gate of the second semiconductor controllable switch T2, so that the second semiconductor controllable switch T2 is
  • the panel manufacturer proposes to use a pulse width modulation method to drive the AMOLED driving circuit.
  • a pulse width modulation method to drive the AMOLED driving circuit.
  • the driving time of the organic light emitting diode is divided into N sub-frame times, although the effect of the storage capacitor C1 on the second semiconductor controllable switch T2 can be better eliminated, but the transmission speed of the data driving signal in each sub-frame time is required. It must be relatively increased, so that the data transmission of the above AMOLED driving circuit is limited by the transmission speed of the driving chip and the access speed of the memory.
  • the object of the present invention is to provide an AMOLED driving method with low requirements on the transmission speed of the driving chip and the access speed of the memory; to solve the requirements of the current AMOLED driving method for the transmission speed of the driving chip and the access speed of the memory. Higher technical issues.
  • An embodiment of the present invention provides an AMOLED driving method, including:
  • n is a positive integer greater than or equal to 1;
  • All of the PWM driving signals of each frame of the picture are transmitted to the organic light emitting diode at the corresponding sub driving time to perform screen display driving.
  • the grayscale value of each pixel of each frame of the picture is divided into eight in bytes, and each of the PWM driving signals is used to represent one of the grayscale values. byte.
  • the step of dividing the driving time of each frame of the organic light emitting diode into n sub-driving times is specifically as follows:
  • the step of transmitting all the PWM driving signals of each frame to the organic light emitting diode at the corresponding sub driving time to perform screen display driving is specifically:
  • All of the PWM drive signals for each frame of the picture are combined to form a grayscale value for each pixel of each frame of the picture for screen display driving.
  • the AMOLED driving method further includes:
  • a discharge signal is used to discharge the storage capacitor corresponding to the organic light emitting diode.
  • the PWM driving signal includes a first start signal, a first clock signal, and a first enable signal.
  • the discharge signal includes a second start signal, a second clock signal, and a second enable signal.
  • the gray scale value of each pixel ranges from 0 to 255.
  • the PWM driving signal has two states of a high level driving signal and a low level driving signal.
  • An embodiment of the present invention further provides an AMOLED driving method, including:
  • n PWMs of the organic light emitting diode Pulse width modulation, Pulse Width Modulation
  • All of the PWM driving signals of each frame of the picture are transmitted to the organic light emitting diode at the corresponding sub driving time to perform screen display driving.
  • the grayscale value of each pixel of each frame of the picture is divided into n parts by byte.
  • the step of dividing the grayscale value of each pixel of each frame into n parts includes:
  • the binary value is used to represent the grayscale value of each pixel of each frame of the picture.
  • the grayscale value of each pixel of each frame of the picture is divided into eight in bytes, and each of the PWM driving signals is used to represent one of the grayscale values. byte.
  • the step of dividing the driving time of each frame of the organic light emitting diode into n sub-driving times is specifically as follows:
  • the step of transmitting all the PWM driving signals of each frame to the organic light emitting diode at the corresponding sub driving time to perform screen display driving is specifically:
  • All of the PWM drive signals for each frame of the picture are combined to form a grayscale value for each pixel of each frame of the picture for screen display driving.
  • the AMOLED driving method further includes:
  • a discharge signal is used to discharge the storage capacitor corresponding to the organic light emitting diode.
  • the PWM driving signal includes a first start signal, a first clock signal, and a first enable signal.
  • the discharge signal includes a second start signal, a second clock signal, and a second enable signal.
  • the gray scale value of each pixel ranges from 0 to 255.
  • the PWM driving signal has two states of a high level driving signal and a low level driving signal.
  • the AMOLED driving method of the present invention reduces the data amount of each PWM driving signal by dividing the grayscale value of each pixel, thereby reducing the transmission speed of the driving chip and The requirement of the access speed of the memory solves the technical problem that the current AMOLED driving method has high requirements on the transmission speed of the driving chip and the access speed of the memory.
  • 1 is a conventional AMOLED driving circuit
  • FIG. 2 is a flow chart of a first preferred embodiment of an AMOLED driving method of the present invention
  • FIG. 3 is a flow chart of a second preferred embodiment of the AMOLED driving method of the present invention.
  • FIG. 2 is a flow chart of a first preferred embodiment of the AMOLED driving method of the present invention.
  • the AMOLED driving method of the preferred embodiment includes:
  • Step S201 dividing the grayscale value of each pixel of each frame into n parts to obtain n PWM driving signals of the organic light emitting diode;
  • Step S202 dividing the driving time of each frame of the organic light emitting diode into n sub-driving times
  • step S203 all the PWM driving signals of each frame are sent to the organic light emitting diode at the corresponding sub driving time to perform screen display driving.
  • step S201 the AMOLED driving circuit divides the grayscale value of each pixel of each frame picture into n parts, thus obtaining n PWM driving signals of the light emitting diode.
  • Each PWM drive signal represents a portion of the grayscale value of the corresponding pixel, where n is a positive integer greater than or equal to one. Then it proceeds to step S202.
  • step S202 the AMOLED driving circuit divides the driving time of each frame of the organic light emitting diode into n sub-driving times, and the time interval of each sub-driving time is the same, wherein the sub-driving time of each frame is one with the PWM driving signal. A correspondence. Then it proceeds to step S203.
  • step S203 all the PWM driving signals of each frame of the picture acquired in step S201 are sent to the organic light emitting diodes in the corresponding sub driving time obtained in step S202, so that the organic light emitting diodes are for each frame described above. All PWM drive signals are accumulated to achieve picture display driving.
  • the AMOLED driving method of the preferred embodiment reduces the data amount of each PWM driving signal by dividing the grayscale value of each pixel, and the data amount of all the PWM driving signals of each frame is equivalent to the original frame every frame. One-nth of the data amount of all PWM drive signals, thereby reducing the transmission speed of the drive chip and the access speed of the memory.
  • FIG. 3 is a flow chart of a second preferred embodiment of the AMOLED driving method of the present invention.
  • the AMOLED driving method of the preferred embodiment includes:
  • Step S301 using a binary value to represent a grayscale value of each pixel of each frame of the picture
  • Step S302 dividing the grayscale value of each pixel of each frame picture into n parts to obtain n PWM driving signals of the organic light emitting diode;
  • Step S303 dividing the driving time of each frame of the organic light emitting diode into n sub-driving times
  • Step S304 transmitting all the PWM driving signals of each frame of the picture to the organic light emitting diode at the corresponding sub driving time for performing screen display driving;
  • Step S305 after the display of each frame is completed, discharging the storage capacitor corresponding to the organic light emitting diode by using a discharge signal.
  • step S301 the AMOLED driving device uses the binary value to represent the grayscale value of each pixel of each frame of the picture; since the grayscale value of each two pixels ranges from 0 to 255, the range of the grayscale value is 0 to 11111111. Then it proceeds to step S302.
  • step S302 the AMOLED driving device divides the grayscale value of each pixel of each frame picture into n parts to obtain n PWM driving signals of the organic light emitting diode. Specifically, the grayscale value of each pixel of each frame is divided into eight in bytes, so that each PWM driving signal can be used to represent one byte of the grayscale value. Then it proceeds to step S303.
  • step S303 the AMOLED driving device divides the driving time of each frame of the organic light emitting diode into n sub-driving times so that the organic light emitting diode effectively displays each PWM driving signal. Then it proceeds to step S304.
  • step S304 the AMOLED driving device sends all the PWM driving signals of each frame to the organic light emitting diode at the corresponding sub driving time to perform screen display driving; specifically:
  • the AMOLED driving device sends all the PWM driving signals of each frame to the organic light emitting diodes at corresponding sub driving times; that is, each PWM driving signal includes a first starting signal for controlling the start of the PWM driving signal, And a first clock signal for controlling a PWM drive signal time and a first enable signal for controlling a PWM drive signal output. Since one byte of the grayscale value may only be 1 or 0, the PWM drive signal has only two states of a high level driving signal and a low level driving signal, which are respectively used to represent 0 or 1.
  • the AMOLED driving device then synthesizes all the PWM driving signals of each frame of the picture to form a grayscale value of each pixel of each frame of the picture for screen display driving. Then it proceeds to step S305.
  • step S305 after each frame of the screen is displayed, the AMOLED driving device performs a discharging operation on the storage capacitor corresponding to the organic light emitting diode by using the discharge signal.
  • the discharge signal herein includes a second start signal for controlling the start of the discharge signal, a second clock signal for controlling the discharge signal time, and a second enable signal for controlling the discharge signal output.
  • the AMOLED driving method of the preferred embodiment refines the setting of the PWM driving signal on the basis of the first preferred embodiment, so that the number of PWM driving signals is smaller; and the storage capacitor pair is better eliminated by the setting of the discharging signal.
  • the display effect of the corresponding display device is further improved.
  • the AMOLED driving method of the present invention reduces the data amount of each PWM driving signal by dividing the grayscale value of each pixel, thereby reducing the transmission speed of the driving chip and the access speed of the memory;
  • the existing AMOLED driving method has a technical problem that the transmission speed of the driving chip and the access speed of the memory are high.

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

Abstract

一种AMOLED驱动方法，包括将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二极管的n个PWM驱动信号(S201)；将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间(S202)，其中每帧画面的子驱动时间与PWM驱动信号一一对应；将每帧画面的所有PWM驱动信号在对应的子驱动时间发送至有机发光二极管，以进行画面显示(S203)。

Description

AMOLED驱动方法 技术领域
本发明涉及电子显示领域，特别是涉及一种AMOLED驱动方法。
 背景技术
由于平面显示的制程技术及材料的进步, 使得有机发光二极体(AMOLED，Active-matrix organic light-emitting diode) 慢慢地成为未来显示器的主流。
图1所示为一种现有的AMOLED驱动电路，其包括第一半导体可控开关T1、第二半导体可控开关T2、储能电容C1和有机发光二级管D1。第二半导体可控开关T2一端连接到第一控制电压VDD，另一端与有机发光二级管D1的正极连接，有机发光二级管D1的负极连接到第二控制电压VSS，第一半导体可控开关T1的源极连接到AMOLED显示面板的数据驱动信号SN，第一半导体可控开关T1的栅极连接到AMOLED显示面板的扫描驱动信号GN，第一半导体可控开关T1的漏极连接到第二半导体可控开关T2的栅极，存储电容C1串接在第二半导体可控开关T2的源极和栅极之间，使得第二半导体可控开关T2控制于饱和区，借此提供AMOLED电流及发光。
为了提高上述AMOLED驱动电路的驱动一致性，面板制作商提出了一种使用脉冲宽度调变的方式来驱动AMOLED驱动电路，具体请参照申请号为201410014397.X的一种AMOLED驱动电路及其驱动方法的发明专利。其中将有机发光二极管一帧驱动时间分成N个子帧时间，虽然这样可以较好的消除存储电容C1对第二半导体可控开关T2的影响，但是要求每个子帧时间内的数据驱动信号的传输速度必须相对提升，使得上述AMOLED驱动电路的数据传输会受限于驱动芯片的传输速度以及存储器的存取速度。
故，有必要提供一种AMOLED驱动方法，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种对驱动芯片的传输速度以及存储器的存取速度要求较低的AMOLED驱动方法；以解决现有的AMOLED驱动方法对驱动芯片的传输速度以及存储器的存取速度的要求较高的技术问题。
 技术解决方案
本发明实施例提供一种AMOLED驱动方法，其包括：
使用二进制数值来表示每帧画面的每个像素的所述灰阶值；
将每帧画面的每个像素的灰阶值按字节划分为n份，以获得有机发光二级管的n个PWM驱动信号；其中n为大于等于1的正整数；
将所述有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；其中每帧画面的所述子驱动时间与所述PWM驱动信号一一对应；以及
将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动。
在本发明所述的AMOLED驱动方法中，所述将每帧画面的每个像素的灰阶值按字节划分为八份，每个所述PWM驱动信号用于表示所述灰阶值的一个字节。
在本发明所述的AMOLED驱动方法中，所述将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间的步骤具体为：
将有机发光二极管的每帧画面的驱动时间等分为n个子驱动时间；
所述将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动的步骤具体为：
将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管；以及
对每帧画面的所有的所述PWM驱动信号进行合成，形成每帧画面的每个像素的灰阶值，以进行画面显示驱动。
在本发明所述的AMOLED驱动方法中，所述AMOLED驱动方法还包括：
在每帧画面显示完毕后，使用放电信号对所述有机发光二级管对应的储能电容进行放电操作。
在本发明所述的AMOLED驱动方法中，所述PWM驱动信号包括第一起始信号、第一时钟信号以及第一使能信号。
在本发明所述的AMOLED驱动方法中，所述放电信号包括第二起始信号、第二时钟信号以及第二使能信号。
在本发明所述的AMOLED驱动方法中，每个像素的所述灰阶值的范围为0至255。
在本发明所述的AMOLED驱动方法中，所述PWM驱动信号具有高电平驱动信号以及低电平驱动信号两个状态。
本发明实施例还提供一种AMOLED驱动方法，其包括：
将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二级管的n个PWM（脉冲宽度调制，Pulse Width Modulation）驱动信号；其中n为大于等于1的正整数；
将所述有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；其中每帧画面的所述子驱动时间与所述PWM驱动信号一一对应；以及
将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动。
在本发明所述的AMOLED驱动方法中，所述将每帧画面的每个像素的灰阶值按字节划分为n份。
在本发明所述的AMOLED驱动方法中，所述将每帧画面的每个像素的灰阶值划分为n份的步骤之前还包括：
使用二进制数值来表示每帧画面的每个像素的所述灰阶值。
在本发明所述的AMOLED驱动方法中，所述将每帧画面的每个像素的灰阶值按字节划分为八份，每个所述PWM驱动信号用于表示所述灰阶值的一个字节。
在本发明所述的AMOLED驱动方法中，所述将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间的步骤具体为：
将有机发光二极管的每帧画面的驱动时间等分为n个子驱动时间；
所述将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动的步骤具体为：
将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管；以及
对每帧画面的所有的所述PWM驱动信号进行合成，形成每帧画面的每个像素的灰阶值，以进行画面显示驱动。
在本发明所述的AMOLED驱动方法中，所述AMOLED驱动方法还包括：
在每帧画面显示完毕后，使用放电信号对所述有机发光二级管对应的储能电容进行放电操作。
在本发明所述的AMOLED驱动方法中，所述PWM驱动信号包括第一起始信号、第一时钟信号以及第一使能信号。
在本发明所述的AMOLED驱动方法中，所述放电信号包括第二起始信号、第二时钟信号以及第二使能信号。
在本发明所述的AMOLED驱动方法中，每个像素的所述灰阶值的范围为0至255。
在本发明所述的AMOLED驱动方法中，所述PWM驱动信号具有高电平驱动信号以及低电平驱动信号两个状态。
 有益效果
相较于现有的AMOLED驱动方法，本发明的AMOLED驱动方法通过对每个像素的灰阶值进行划分，从而降低了每个PWM驱动信号的数据量，进而降低了对驱动芯片的传输速度以及存储器的存取速度的要求；解决了现有的AMOLED驱动方法对驱动芯片的传输速度以及存储器的存取速度的要求较高的技术问题。
 附图说明
图1为一种现有的AMOLED驱动电路；
图2为本发明的AMOLED驱动方法的第一优选实施例的流程图；
图3为本发明的AMOLED驱动方法的第二优选实施例的流程图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。
在图中，结构相似的单元是以相同标号表示。
请参照图2，图2为本发明的AMOLED驱动方法的第一优选实施例的流程图。本优选实施例的AMOLED驱动方法包括：
步骤S201，将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二极管的n个PWM驱动信号；
步骤S202，将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；
步骤S203，将每帧画面的所有的PWM驱动信号在对应的子驱动时间发送至有机发光二级管，以进行画面显示驱动。
下面详细说明本优选实施例的AMOLED驱动方法的各步骤的具体流程。
在步骤S201中，AMOLED驱动电路将每帧画面的每个像素的灰阶值划为n份，这样以获得发光二级管的n个PWM驱动信号。每个PWM驱动信号代表相应的像素的灰阶值的一部分，这里n为大于等于1的正整数。随后转到步骤S202。
在步骤S202中，AMOLED驱动电路将有机发光二级管的每帧画面的驱动时间分为n个子驱动时间，每个子驱动时间的时间间隔相同，其中每帧画面的子驱动时间与PWM驱动信号一一对应。随后转到步骤S203。
在步骤S203中，将步骤S201中获取的每帧画面的所有的PWM驱动信号在步骤S202中获取的对应的子驱动时间发送至有机发光二极管，这样有机发光二级管对上述的每帧画面的所有PWM驱动信号进行累积，从而实现了画面显示驱动。
这样即完成了本优选实施例的AMOLED驱动方法的画面驱动过程。
本优选实施例的AMOLED驱动方法通过对每个像素的灰阶值进行划分，从而降低了每个PWM驱动信号的数据量，每帧画面的所有的PWM驱动信号的数据量相当于原来每帧画面的所有PWM驱动信号的数据量的n分之一，进而降低了对驱动芯片的传输速度以及存储器的存取速度的要求。
请参照图3，图3为本发明的AMOLED驱动方法的第二优选实施例的流程图。本优选实施例的AMOLED驱动方法包括：
步骤S301，使用二进制数值来表示每帧画面的每个像素的灰阶值；
步骤S302，将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二极管的n个PWM驱动信号；
步骤S303，将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；
步骤S304，将每帧画面的所有PWM驱动信号在对应的子驱动时间发送至有机发光二极管，以进行画面显示驱动；
步骤S305，在每帧画面显示完毕后，使用放电信号对有机发光二级管对应的储能电容进行放电操作。
下面详细说明本优选实施例的AMOLED驱动方法的各步骤的具体流程。
在步骤S301中，AMOLED驱动装置使用二级制数值来表示每帧画面的每个像素的灰阶值；由于每二个像素的灰阶值的范围为0至255，因此灰阶值的范围为0至11111111。随后转到步骤S302。
在步骤S302中，AMOLED驱动装置将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二级管的n个PWM驱动信号。具体为，将每帧画面的每个像素的灰阶值按字节划分为八份，这样每个PWM驱动信号可用于表示灰阶值的一个字节。随后转到步骤S303。
在步骤S303中，AMOLED驱动装置将有机发光二极管的每帧画面的驱动时间等分为n个子驱动时间，以便有机发光二极管对每个PWM驱动信号进行有效显示。随后转到步骤S304。
在步骤S304中，AMOLED驱动装置将每帧画面的所有PWM驱动信号在对应的子驱动时间发送至有机发光二极管，以进行画面显示驱动；具体为：
首先AMOLED驱动装置将每帧画面的所有的PWM驱动信号在对应的子驱动时间发送至有机发光二级管；即每个PWM驱动信号均包括用于控制PWM驱动信号开始的第一起始信号、用于控制PWM驱动信号时间的第一时钟信号以及用于控制PWM驱动信号输出的第一使能信号。由于灰阶值的一个字节只可能是1或0，因此PWM驱动信号只具有高电平驱动信号以及低电平驱动信号两个状态，分别用于表示0或1。
随后AMOLED驱动装置对每帧画面的所有的PWM驱动信号进行合成，形成每帧画面的每个像素的灰阶值，以进行画面显示驱动。随后转到步骤S305。
在步骤S305中，AMOLED驱动装置在每帧画面显示完毕后，使用放电信号对有机发光二级管对应的储能电容进行放电操作。这样可以有效的消除存储电容对画面显示的影响。这里的放电信号包括用于控制放电信号开始的第二起始信号、用于控制放电信号时间的第二时钟信号以及用于控制放电信号输出的第二使能信号。
这样即完成了本优选实施例的AMOLED驱动方法的画面驱动过程。
本优选实施例的AMOLED驱动方法在第一优选实施例的基础上，细化了PWM驱动信号的设置，使得PWM驱动信号的数量更小；同时通过放电信号的设置较好的消除了存储电容对画面显示的影响。进一步提高了相应的显示装置的显示效果。
本发明的AMOLED驱动方法通过对每个像素的灰阶值进行划分，从而降低了每个PWM驱动信号的数据量，进而降低了对驱动芯片的传输速度以及存储器的存取速度的要求；解决了现有的AMOLED驱动方法对驱动芯片的传输速度以及存储器的存取速度的要求较高的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (18)

  1. 一种AMOLED驱动方法，其包括：
    使用二进制数值来表示每帧画面的每个像素的所述灰阶值；
    将每帧画面的每个像素的灰阶值按字节划分为n份，以获得有机发光二级管的n个PWM驱动信号；其中n为大于等于1的正整数；
    将所述有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；其中每帧画面的所述子驱动时间与所述PWM驱动信号一一对应；以及
    将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动。
  2. 根据权利要求1所述的AMOLED驱动方法，其中所述将每帧画面的每个像素的灰阶值按字节划分为八份，每个所述PWM驱动信号用于表示所述灰阶值的一个字节。
  3. 根据权利要求2所述的AMOLED驱动方法，其中所述将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间的步骤具体为：
    将有机发光二极管的每帧画面的驱动时间等分为n个子驱动时间；
    所述将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动的步骤具体为：
    将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管；以及
    对每帧画面的所有的所述PWM驱动信号进行合成，形成每帧画面的每个像素的灰阶值，以进行画面显示驱动。
  4. 根据权利要求1所述的AMOLED驱动方法，其中所述AMOLED驱动方法还包括：
    在每帧画面显示完毕后，使用放电信号对所述有机发光二级管对应的储能电容进行放电操作。
  5. 根据权利要求1所述的AMOLED驱动方法，其中所述PWM驱动信号包括第一起始信号、第一时钟信号以及第一使能信号。
  6. 根据权利要求4所述的AMOLED驱动方法，其中所述放电信号包括第二起始信号、第二时钟信号以及第二使能信号。
  7. 根据权利要求2所述的AMOLED驱动方法，其中每个像素的所述灰阶值的范围为0至255。
  8. 根据权利要求2所述的AMOLED驱动方法，其中所述PWM驱动信号具有高电平驱动信号以及低电平驱动信号两个状态。
  9. 一种AMOLED驱动方法，其包括：
    将每帧画面的每个像素的灰阶值划分为n份，以获得有机发光二级管的n个PWM驱动信号；其中n为大于等于1的正整数；
    将所述有机发光二极管的每帧画面的驱动时间分为n个子驱动时间；其中每帧画面的所述子驱动时间与所述PWM驱动信号一一对应；以及
    将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动。
  10. 根据权利要求9所述的AMOLED驱动方法，其中所述将每帧画面的每个像素的灰阶值按字节划分为n份。
  11. 根据权利要求9所述的AMOLED驱动方法，其中所述将每帧画面的每个像素的灰阶值划分为n份的步骤之前还包括：
    使用二进制数值来表示每帧画面的每个像素的所述灰阶值。
  12. 根据权利要求11所述的AMOLED驱动方法，其中所述将每帧画面的每个像素的灰阶值按字节划分为八份，每个所述PWM驱动信号用于表示所述灰阶值的一个字节。
  13. 根据权利要求12所述的AMOLED驱动方法，其中所述将有机发光二极管的每帧画面的驱动时间分为n个子驱动时间的步骤具体为：
    将有机发光二极管的每帧画面的驱动时间等分为n个子驱动时间；
    所述将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管，以进行画面显示驱动的步骤具体为：
    将每帧画面的所有的所述PWM驱动信号在对应的所述子驱动时间发送至所述有机发光二极管；以及
    对每帧画面的所有的所述PWM驱动信号进行合成，形成每帧画面的每个像素的灰阶值，以进行画面显示驱动。
  14. 根据权利要求9所述的AMOLED驱动方法，其中所述AMOLED驱动方法还包括：
    在每帧画面显示完毕后，使用放电信号对所述有机发光二级管对应的储能电容进行放电操作。
  15. 根据权利要求9所述AMOLED驱动方法，其中所述PWM驱动信号包括第一起始信号、第一时钟信号以及第一使能信号。
  16. 根据权利要求14所述的AMOLED驱动方法，其中所述放电信号包括第二起始信号、第二时钟信号以及第二使能信号。
  17. 根据权利要求12所述的AMOLED驱动方法，其中每个像素的所述灰阶值的范围为0至255。
  18. 根据权利要求12所述的AMOLED驱动方法，其中所述PWM驱动信号具有高电平驱动信号以及低电平驱动信号两个状态。
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CN103700348A (zh) * 2013-12-31 2014-04-02 深圳市华星光电技术有限公司 一种amoled驱动电路及其驱动方法
CN104575380A (zh) * 2014-12-31 2015-04-29 昆山工研院新型平板显示技术中心有限公司 像素电路和有源矩阵有机发光显示器

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