WO2018099267A1 - 一种驱动控制电路及其驱动方法、显示装置 - Google Patents

一种驱动控制电路及其驱动方法、显示装置 Download PDF

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Publication number
WO2018099267A1
WO2018099267A1 PCT/CN2017/111154 CN2017111154W WO2018099267A1 WO 2018099267 A1 WO2018099267 A1 WO 2018099267A1 CN 2017111154 W CN2017111154 W CN 2017111154W WO 2018099267 A1 WO2018099267 A1 WO 2018099267A1
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Prior art keywords
driving
signal
circuit
control circuit
driving signal
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PCT/CN2017/111154
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English (en)
French (fr)
Inventor
陈心全
王向前
朱修剑
葛明伟
王峥
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昆山国显光电有限公司
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Application filed by 昆山国显光电有限公司 filed Critical 昆山国显光电有限公司
Priority to EP17875284.6A priority Critical patent/EP3493186A4/en
Priority to JP2019512737A priority patent/JP2019532330A/ja
Priority to US16/322,054 priority patent/US10748483B2/en
Priority to KR1020197007131A priority patent/KR20190033628A/ko
Publication of WO2018099267A1 publication Critical patent/WO2018099267A1/zh

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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
    • G09G3/30—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
    • G09G3/3233—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 current through the light-emitting element
    • 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
    • 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]
    • G09G3/3266—Details of drivers for scan 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
    • 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
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor

Definitions

  • the present invention relates to the field of display driving technologies, and in particular, to a driving control circuit, a driving method thereof, and a display device.
  • AMOLED Active-matrix organic light emitting diode
  • Magnetic Screen Active-matrix organic light emitting diode
  • the pixel circuit receives the data signal loaded by the scan driving circuit and the driving signal loaded by the transmitting control signal, so as to realize the opening and closing of each TFT in the pixel circuit, and further, the light emitting unit corresponding to each pixel point is realized. Bright and dark control.
  • the brightness of adjacent rows in the screen body is different, and thus the brightness unevenness occurs in the screen body.
  • the phenomenon, especially the lateral brightness is not uniform, thus forming a lateral Mura.
  • the invention provides a driving control circuit, a driving method thereof and a display device for improving the lateral Mura phenomenon in the display screen existing in the prior art.
  • a driving control circuit comprising: a driving integrated circuit, a transmitting control circuit, and a scanning drive a circuit and a pixel circuit;
  • the driving integrated circuit is configured to adjust a duty ratio of a driving signal to be output, generate a first driving signal, and send the first driving signal to the emission control circuit;
  • the emission control circuit is connected between the driving integrated circuit and the pixel circuit, and configured to convert the received first driving signal into a second driving signal having a preset duty ratio, and send the a pixel circuit, wherein a preset duty ratio of the second driving signal is greater than a duty ratio of the driving signal to be output;
  • the pixel circuit is configured to perform driving control on the corresponding pixel unit according to the received second driving signal and the first data signal sent by the scan driving circuit.
  • Driving the integrated circuit to adjust the duty ratio of the output driving signal, generating a first driving signal, and transmitting the first driving signal to the emission control circuit; and, reducing the amplitude of the data signal to be output, generating a first data signal and transmitting the first data signal to a scan driving circuit;
  • the emission control circuit converts the received first driving signal into a second driving signal having a preset duty ratio, and sends the second driving signal to the pixel circuit, wherein a preset duty ratio of the second driving signal is greater than a duty ratio of the driving signal to be output; and the scan driving circuit transmits the first data signal to the pixel circuit;
  • a display device includes the drive control circuit.
  • the driving integrated circuit adjusts the duty ratio of the driving signal provided to the emission control circuit, so that the generated first driving signal can cooperate with the emission control circuit to form the second driving with the preset duty ratio.
  • Signal; the amplitude of the data signal loaded when the data is written is lowered, and the brightness of each OLED per unit time is raised to ensure the brightness of the entire screen is unchanged.
  • FIG. 1 is a schematic structural diagram of a driving control circuit according to Embodiment 1 of the present invention.
  • FIG. 2(a) is a schematic structural diagram of a transmission control circuit 12 in the prior art
  • 2(b) is a schematic structural diagram of a simplified transmission control circuit in the solution of the present application.
  • Figure 3 (a) is a timing control diagram of the prior art
  • Figure 3 (b) is a timing control diagram of the solution of the present application.
  • FIG. 4 is a schematic diagram showing the steps of a driving method of a driving control circuit according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of a display screen A according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a display device according to Embodiment 3 of the present invention.
  • FIG. 1 is a schematic structural diagram of a driving control circuit according to Embodiment 1 of the present invention.
  • the driving control circuit mainly includes: a driving integrated circuit 11, a transmitting control circuit 12, a scan driving circuit 13, and a pixel circuit 14; among them:
  • Driving the integrated circuit 11 for adjusting the duty ratio of the driving signal to be output, generating the first driving signal S1, and transmitting the first driving signal S1 to the emission control circuit 12; and for using the data signal to be output
  • the amplitude is turned down, the first data signal D1 is generated, and the first data signal D1 is sent to the scan driving circuit 13;
  • the emission control circuit 12 is connected between the driving integrated circuit 11 and the pixel circuit 14 for converting the received first driving signal S1 into a second driving signal S2 having a preset duty ratio, and transmitting the signal to the pixel circuit 14
  • the preset duty ratio of the second driving signal S2 is greater than the duty ratio of the driving signal to be outputted;
  • the pixel circuit 14 is configured to perform driving control on the corresponding pixel unit according to the received second driving signal S2 and the first data signal D1 sent by the scan driving circuit 13.
  • the driving integrated circuit 11 may specifically be a driving chip integrated with various circuit functions, and the driving integrated circuit 11 respectively provides corresponding signals for the transmitting control circuit 12 and the scanning driving circuit 13, and also provides high and low power for the transmitting control circuit 12. level.
  • the driving integrated circuit 11 can adjust the duty ratio of the driving signal supplied to the emission control circuit 12 on the one hand, so that the generated first driving signal S1 can be combined with the emission control circuit 12 to form a preset duty ratio.
  • the second driving signal S2, the preset duty ratio of the second driving signal S2 is greater than the duty ratio of the driving signal to be output, that is, the duty ratio of the second driving signal S2 is higher than that of the prior art because
  • the driving integrated circuit 11 directly sends the driving signal to be output to the transmitting control circuit 12, and the transmitting control circuit 12 generally only performs current amplification processing on the driving signal, that is, sequentially loads each row in the pixel circuit. .
  • the present application adjusts the duty ratio of the driving signals to be outputted in the driving integrated circuit 11 so that the duty ratios of the second driving signals loaded into each row of the pixel circuits are all increased; Considering that the OLED in the pixel circuit is lit when the driving signal is at a low level, the duty ratio of the second driving signal is increased to mean that the low level continues for a short time, that is, the OLED is lit in each frame.
  • the driving integrated circuit 11 lowers the amplitude of the data signal loaded when the data is written, and improves each OLED per unit time. The brightness of the screen ensures the brightness of the entire screen.
  • the reason why the lateral Mura phenomenon can be improved in the present application is that: by shortening the lighting time of the OLED in each frame, the difference in brightness between each line of the pixel circuit is only reflected in a short time, and further, The overall time of Mura is shortened, and the lateral Mura phenomenon that occurs when the screen is displayed is improved.
  • the adjustment of the driving signal to be output by the driving integrated circuit 11 can be implemented by the duty ratio adjusting circuit: specifically, the driving integrated circuit includes a duty ratio adjusting circuit for The duty ratio of the original driving signal is adjusted, for example, the duty ratio of the driving signal with a duty ratio of 3% is amplified, and the original signal is passed through the duty ratio adjusting circuit, so that the duty ratio is enlarged to 60%, and then The duty ratio of the adjusted duty ratio of 60% is output as a driving signal to the emission control circuit 12. 2.
  • the duty ratio parameter to be adjusted is set in the driving integrated circuit 11 to directly output: specifically, the direct output A drive signal having a desired duty ratio, for example, a drive signal having a duty ratio of 60% is directly outputted to the emission control circuit 12 such that the duty ratio of the drive signal reaches a desired value.
  • a specific adjustment manner and parameters may be selected according to characteristics of the pixel circuit, wherein the characteristics of the pixel circuit include: display primary color, screen size, and screen resolution Rate and so on.
  • the circuit of the driver integrated circuit 11 and the improvement of the function may be combined with the improvement of the emission control circuit 12, or the emission control circuit 12 may maintain the existing circuit structure.
  • the transmission control circuit 12 includes a large number of circuit elements, which are not described herein. It should be noted that the transmission control circuit 12 receives the first driving signal sent by the driving integrated circuit 11 and various clock signals, wherein it is assumed that the driving integrated circuit 11 only adjusts the duty ratio of the first driving signal, and other clocks The signal is not adjusted, and after the amplification process by the emission control circuit 12, a second drive signal having a preset duty ratio is output.
  • the reason why the amplification process is needed is because the first driving signal S1 is not the current signal required to drive the pixel circuit, and the first driving signal S1 needs to be amplified to achieve the corresponding driving current threshold to open the corresponding pixel circuit. Switching elements to illuminate each row of OLEDs in the pixel circuit.
  • the duty ratio of the first driving signal and the preset duty ratio of the second driving signal have a certain value.
  • the emission control circuit 12 is configured to perform duty cycle inversion and current amplification processing on the received first driving signal S1 to form The second drive signal S2 of the preset duty ratio.
  • the duty ratio is reversed.
  • the preset duty ratio is 60%
  • the second driving signal S1 is obtained after the duty cycle inversion processing of the emission control circuit 12, therefore, the first driving signal S1 can be determined.
  • the duty cycle is 40%. Further, in the drive integrated circuit 11, regardless of the duty ratio of the drive signal to be output, it is necessary to finally generate the first drive signal S1 having a duty ratio of 40%.
  • the transmission control circuit 12 is connected to the driven integrated circuit 11 through a signal input port K1, and passes through a signal output port.
  • K2 is connected to the pixel circuit 14. Therefore, the connection mode of the single input and single output can simplify the circuit connection structure, and the purpose of sequentially outputting the second drive signal S2 can be realized only by providing the timing control device inside the emission control circuit 12.
  • the emission control circuit 12 specifically includes: a first P-type field effect transistor M1, a second P-type field effect transistor M2, a third P-type field effect transistor M3, and a first a capacitor C1; wherein the source of the first P-type field effect transistor M1 is connected to the first node N1, the gate is connected to the drain of the second P-type field effect transistor M2, and the drain is connected to the low level; the second P-type field The source of the effect transistor M2 is connected to the second node N2, the gate is connected to the first node N1, the drain is connected to the gate of the first P-type field effect transistor M1, and the source of the third P-type field effect transistor M3 is connected to the high level.
  • the gate is connected to the signal input port K1, and the drain is connected to the second node; one end of the first capacitor C1 is connected to the first node N1, the other end is connected to the second node N2, and the second node N2 is connected to the signal output port K2.
  • the high and low levels in the emission control circuit 12 are all provided by the driving integrated circuit 11 to implement reverse amplification of the first driving signal S1 in cooperation with the respective field effect transistors in the emission control circuit 12.
  • the driving integrated circuit 11 is further configured to adjust the period of the driving signal to be output, so that the second is sent to the pixel circuit 14.
  • the period T1 of the drive signal S2 is the same as the line period T2.
  • the period T1 of the second driving signal S2 is large. It is obviously larger than the line period T2, and the duty ratio is small, which causes the OLED to illuminate in the screen body for a long time and is almost continuous, and the Mura phenomenon is more obvious.
  • the period T1 of the second driving signal S2 is small, and is the same as the row period T2, and the duty ratio is large. Further, the OLED in the screen body is illuminated for a short time and is discontinuous; By adjusting the amplitude of the data signal, the brightness of the OLED per unit time is increased, thus reducing the lateral direction.
  • the Mura phenomenon improves display quality.
  • the duty ratio of the driving signal emitted from the conventional emission control circuit is generally 3%, that is, the lighting time is very long, and the data writing time is short. Therefore, it is only necessary to adjust the duty ratio of the driving signal to be outputted in the driving integrated circuit, and it is considered that the second driving is ensured in the driving integrated circuit due to the difference in the emission control circuit.
  • the duty ratio of the signal is greater than 3%, and in general, the duty ratio of the driving signal to be output is the duty ratio of the driving signal emitted by the transmitting control circuit in the prior art.
  • the range of the preset duty ratio in the present application may preferably be 40%-90%. Among them, 60% is preferred.
  • the selection of the preset duty ratio not only improves the lateral Mura phenomenon exhibited by the screen body, but also ensures that the data signal can be at a high level of the second driving signal during the driving control process.
  • the writing is sufficient for the duration.
  • FIG. 4 is a schematic diagram showing the steps of a driving method for the above-mentioned driving control circuit according to Embodiment 2 of the present invention; the method mainly includes the following steps:
  • Step 401 The driving integrated circuit adjusts the duty ratio of the driving signal to be output, generates a first driving signal, and sends the first driving signal to the transmitting control circuit; and lowers the amplitude of the data signal to be output. A first data signal is generated and the first data signal is sent to a scan drive circuit.
  • Step 402 The emission control circuit converts the received first driving signal into a second driving signal having a preset duty ratio, and sends the second driving signal to the pixel circuit, wherein the preset duty ratio of the second driving signal is greater than the waiting The duty cycle of the output drive signal.
  • Step 403 The scan driving circuit sends the first data signal to the pixel circuit.
  • step 402 The sequence of steps 403 in step 402 is not limited, and generally can be considered as specific. The timing is executed simultaneously.
  • a display screen A having a lateral Mura which is provided with a driving IC, a transmission control circuit EM, a scanning circuit S, and a pixel circuit M.
  • the duty ratio required to be adjusted by the present application is determined according to the model and the like. For example, the duty ratio of the drive signal currently outputted to the pixel circuit M is 3%, and the duty ratio of the drive signal output to the pixel circuit M is determined to be 60% to improve the Mura.
  • the emission control circuit EM adopts the circuit structure in FIG. 2(b).
  • the drive IC increases the duty ratio of the original drive signal from 3% to 40% to generate the signal X1, and the drive IC sends the signal X1 to the emission control circuit EM, after which the signal X1 is transmitted by the emission control circuit EM.
  • the signal is inverted and amplified to obtain a signal X2 having a duty ratio of 60% and having a strong driving force, and the signal X2 is sent to the pixel circuit M of the display A.
  • the driving IC reduces the amplitude of the original data signal to the signal Y1, and the specific adjustment value of the amplitude is related to the model of the display A, the degree of Mura, etc., and the parameters can be adjusted according to specific conditions, and
  • the drive IC transmits the adjusted signal Y1 to the scan driving circuit S.
  • the scan driving circuit S performs timing control on the signal Y1 and transmits it to the pixel circuit M of the display A.
  • the display screen A is driven by the pixel circuit M of the display A in accordance with the signal X2 and the signal Y1.
  • Step 404 When driving control of each row of pixel circuits, if the second driving signal is at a high level, the pixel circuit is turned off; if after the data is written and the second driving signal is at a low level, the pixel circuit is turned on.
  • the specific timing control may be combined with the scan signal s1 and the data signal s2 sent by the scan driving circuit to display the pixel points in the screen body, as shown in FIG. 3(b).
  • the function of the line synchronizing signal VS is to synchronize the signal transmitting end and the receiving end; the scanning signal s1 sent by the scan driving circuit is used for scanning initialization of the pixel of the screen line by line, and the data signal s2 sent by the scan driving circuit is used.
  • Data is written to the screen pixel points row by row, and in the process of driving and writing data to the same line of screen pixels, the data signal s2 lags behind the scan signal s1.
  • the screen pixel After the scan driving and data writing, the screen pixel is turned on when the second driving signal S2 is low voltage, the screen pixel is turned off when the voltage is high, and the second driving signal S2 having the 60% duty ratio is caused by the horizontal Mura displayed by the screen body.
  • the display time is 40% of the total display time. Because the signal frequency is high, and the display brightness is increased per unit time by adjusting the amplitude of the data signal, the horizontal Mura phenomenon is not easily captured by human eyes, and the screen body is improved. The horizontal Mura phenomenon is presented to improve the display quality.
  • the present invention also provides a display device, as shown in Figure 6, which includes any of the drive control circuits described above.
  • the driving integrated circuit 11 is located at one edge region of the non-display area of the display device
  • the emission control circuit 12 and the scan driving circuit 13 are respectively disposed at both side edge regions of the display region
  • the pixel circuit 14 is disposed at the display region.
  • the display device is specifically an AMOLED display device.
  • the display device further includes other display modules, such as a display substrate, a back panel, a touch screen, and the like.

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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 Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
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Abstract

一种驱动控制电路及其驱动方法、显示装置，用以改善现有技术存在的显示屏体中横向Mura现象。驱动集成电路（11）通过为提供给发射控制电路（12）的驱动信号进行占空比的调整，以使得生成的第一驱动信号（S1）能够配合发射控制电路（12）形成具有预设占空比的第二驱动信号（S2），该预设占空比大于驱动集成电路（11）中待输出的驱动信号的占空比；将写入数据时加载的数据信号的幅值调低，提升单位时间内每个OLED的亮度，以保证整个屏体亮度不变。通过缩短每一帧内OLED点亮的时间，使得像素电路每一行之间的亮度差异这一Mura仅体现在较短的时间内，进而，从整体上缩短了Mura发生的时间，改善了屏体显示时出现的横向Mura现象。

Description

一种驱动控制电路及其驱动方法、显示装置 技术领域
本发明涉及显示驱动技术领域，尤其涉及一种驱动控制电路及其驱动方法、显示装置。
背景技术
有源矩阵有机发光二极体面板(Active-matrix organic light emitting diode，AMOLED)也称“魔丽屏”。与多数手机使用的传统液晶显示器相比，AMOLED具有更宽的视角、更高的刷新率和更薄的尺寸，因此该技术逐渐受到重视。
在AMOLED显示驱动过程中，像素电路接收扫描驱动电路加载的数据信号以及发射控制信号加载的驱动信号，以实现对像素电路中各个TFT的打开与关闭，进而，实现对各个像素点对应的发光单元的亮暗控制。
然而，由于现有的AMOLED显示屏体中存在各种客观缺陷，例如，硬件材料属性以及工艺误差等缺陷而导致屏体中相邻行的亮度有差异，进而，使得屏体中出现亮度不均一的现象，尤其是横向的亮度不均一，从而形成横向Mura。
因此，如何改善显示屏体中横向Mura现象，是本领域技术人员亟需解决的技术问题。
发明内容
本发明提供了一种驱动控制电路及其驱动方法、显示装置，用以改善现有技术存在的显示屏体中横向Mura现象。
本发明采用以下技术方案：
一种驱动控制电路，包括：驱动集成电路，发射控制电路、扫描驱 动电路以及像素电路；其中，
所述驱动集成电路，用于对待输出的驱动信号的占空比进行调整，生成第一驱动信号，并将所述第一驱动信号发送至所述发射控制电路；以及，
用于将待输出的数据信号的幅值调低，生成第一数据信号，并将所述第一数据信号发送至所述扫描驱动电路；
所述发射控制电路，连接于所述驱动集成电路与所述像素电路之间，用于将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号，并发送至所述像素电路，其中，所述第二驱动信号的预设占空比大于所述待输出的驱动信号的占空比；
所述像素电路，用于根据接收到的所述第二驱动信号以及所述扫描驱动电路发出的第一数据信号对相应像素单元进行驱动控制。
一种对上述所述的驱动控制电路进行驱动的方法，所述方法包括：
驱动集成电路对待输出的驱动信号的占空比进行调整，生成第一驱动信号，并将所述第一驱动信号发送至发射控制电路；以及，将待输出的数据信号的幅值调低，生成第一数据信号，并将所述第一数据信号发送至扫描驱动电路；
所述发射控制电路将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号，并发送至所述像素电路，其中，所述第二驱动信号的预设占空比大于所述待输出的驱动信号的占空比；以及，所述扫描驱动电路发送第一数据信号至所述像素电路；
在对每一行像素电路进行驱动控制时，若所述第二驱动信号处于高电平，所述像素电路关闭；若在写入数据之后且所述第二驱动信号处于低电平，所述像素电路打开。
一种显示装置，包括所述的驱动控制电路。
本发明有益效果如下：
通过本发明实施例，驱动集成电路通过为提供给发射控制电路的驱动信号进行占空比的调整，以使得生成的第一驱动信号能够配合发射控制电路形成具有预设占空比的第二驱动信号；将写入数据时加载的数据信号的幅值调低，提升单位时间内每个OLED的亮度，以保证整个屏体亮度不变。通过缩短每一帧内OLED点亮的时间，使得像素电路每一行之间的亮度差异这一Mura仅体现在较短的时间内，进而，从整体上缩短了Mura发生的时间，改善了屏体显示时出现的横向Mura现象。
附图说明
图1为本发明实施例1提供的一种驱动控制电路的结构示意图；
图2(a)为现有技术中发射控制电路12的结构示意图；
图2(b)为本申请方案中简化的发射控制电路结构示意图；
图3(a)为现有技术的时序控制图；
图3(b)为本申请方案的时序控制图；
图4为本发明实施例2提供的一种驱动控制电路的驱动方法的步骤示意图；
图5为本发明实施例2提供的一种显示屏A的结构示意图；
图6为本发明实施例3提供的一种显示装置的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
以下结合附图，详细说明本申请各实施例提供的技术方案。
实施例1
如图1所示，为本发明实施例1提供的一种驱动控制电路的结构示意图，该驱动控制电路中主要包括：驱动集成电路11，发射控制电路12、扫描驱动电路13以及像素电路14；其中：
驱动集成电路11，用于对待输出的驱动信号的占空比进行调整，生成第一驱动信号S1，并将第一驱动信号S1发送至发射控制电路12；以及，用于将待输出的数据信号的幅值调低，生成第一数据信号D1，并将第一数据信号D1发送至扫描驱动电路13；
发射控制电路12，连接于驱动集成电路11与像素电路14之间，用于将接收到的第一驱动信号S1转换为具有预设占空比的第二驱动信号S2，并发送至像素电路14，第二驱动信号S2的预设占空比大于待输出的驱动信号的占空比；
像素电路14，用于根据接收到的第二驱动信号S2以及扫描驱动电路13发出的第一数据信号D1对相应像素单元进行驱动控制。
其中，驱动集成电路11具体可以为集成有多种电路功能的驱动芯片，该驱动集成电路11分别为发射控制电路12以及扫描驱动电路13提供相应信号，以及还可以为发射控制电路12提供高低电平。
此外，该驱动集成电路11一方面可以为提供给发射控制电路12的驱动信号进行占空比的调整，以使得生成的第一驱动信号S1能够配合发射控制电路12形成具有预设占空比的第二驱动信号S2，第二驱动信号S2的预设占空比大于待输出的驱动信号的占空比，即该第二驱动信号S2的占空比相比现有技术而言较高，因为，现有技术中，驱动集成电路11直接将待输出的驱动信号发送给发射控制电路12，该发射控制电路12一般只对该驱动信号进行电流放大处理，即依次加载给像素电路中的每一行。可 见，本申请通过在驱动集成电路11中对待输出的驱动信号的占空比进行调整，以使得加载至像素电路中每一行的第二驱动信号的占空比都是调高了的；而且，考虑到像素电路中OLED是在驱动信号处于低电平时点亮的，因此，第二驱动信号的占空比调高意味着低电平持续的时间变短，即在每一帧内OLED点亮的时间变短；另一方面，为了保证调整占空比后的整个屏体亮度不变，驱动集成电路11将写入数据时加载的数据信号的幅值调低，提升单位时间内每个OLED的亮度，从而保证整个屏体亮度不变。本申请中之所以能够改善横向Mura现象，是因为：通过缩短每一帧内OLED点亮的时间，使得像素电路每一行之间的亮度差异这一Mura仅体现在较短的时间内，进而，从整体上缩短了Mura发生的时间，改善了屏体显示时出现的横向Mura现象。
其实，在本发明实施例中，1、驱动集成电路11对待输出的驱动信号的调整可以通过占空比调整电路实现：具体地，在驱动集成电路中包含有占空比调整电路，用于对于原有驱动信号的占空比进行调整，例如：对占空比为3％的驱动信号的占空比进行放大，令原信号通过占空比调整电路，使得占空比放大为60％，然后，将调整后占空比为60％的占空比作为驱动信号输出至发射控制电路12。2、在驱动集成电路11中设置所需调整的占空比参数以直接输出：具体地，直接输出具有所需占空比的驱动信号，例如：直接输出占空比为60％的驱动信号至发射控制电路12，以使得驱动信号的占空比达到所需值。其中，驱动集成电路在对待输出的驱动信号进行占空比调整时，可根据像素电路的特点选择具体的调整方式及参数，其中，像素电路的特点包括：显示基色、屏体尺寸、屏体分辨率等。
可选地，在本发明实施例中，驱动集成电路11电路以及功能的改进，可以配合发射控制电路12的改进，或者，发射控制电路12保持现有的电路结构。
具体地，若发射控制电路12保持现有的电路结构，则第一驱动信号的占空比与第二驱动信号的预设占空比之间的比例关系需要根据发射控制电路12的具体结构进行适配，如图2(a)所示，发射控制电路12包含的电路元件较多，在此并不一一描述。而需要说明的是，发射控制电路12接收驱动集成电路11发送的第一驱动信号以及各种时钟信号，其中，假设驱动集成电路11仅对第一驱动信号的占空比进行调整，而其他时钟信号并未调整，那么，经过发射控制电路12的放大处理之后，输出具有预设占空比的第二驱动信号。之所以需要进行放大处理，是因为第一驱动信号S1并不是驱动像素电路所需的电流信号，需要对该第一驱动信号S1进行放大处理，以达到驱动阈值电流才可以打开像素电路中的相应开关元件，以点亮像素电路中的每一行OLED。
若发射控制电路12的电路结构发生改变，例如，简化为如图2(b)所示的电路结构，则第一驱动信号的占空比与第二驱动信号的预设占空比具有一定的互补关系；具体参照图2(b)所示，首先，考虑该电路结构的功能，发射控制电路12用于对接收到的第一驱动信号S1进行占空比反转以及电流放大处理，形成具有预设占空比的第二驱动信号S2。举例说明，当采用如图2(b)所示的电路结构时，要保证第二驱动信号的占空比为预设占空比，需要考虑此时发射控制电路12的作用：占空比反转以及电流放大；因此，假设预设占空比为60％，而该第二驱动信号S1是经过发射控制电路12的占空比反转处理后得到的，因此，可以确定第一驱动信号S1的占空比为40％。进而，在驱动集成电路11中，无论待输出的驱动信号的占空比是多少，最后经过调整必定要生成占空比为40％的第一驱动信号S1。
进一步，基于上述图2(b)的电路结构，发射控制电路12通过一个信号输入端口K1与所驱动集成电路11连接，且通过一个信号输出端口 K2与像素电路14连接。从而，该单输入单输出的连接方式可简化电路连接结构，仅在发射控制电路12内部设置时序控制装置即可实现依次输出第二驱动信号S2的目的。
其中，参照图2(b)所示的电路结构，该发射控制电路12具体包括：第一P型场效应晶体管M1、第二P型场效应晶体管M2、第三P型场效应晶体管M3以及第一电容C1；其中，第一P型场效应晶体管M1的源极连接第一节点N1，栅极连接第二P型场效应晶体管M2的漏极，漏极连接低电平；第二P型场效应晶体管M2的源极连接第二节点N2，栅极连接第一节点N1，漏极连接第一P型场效应晶体管M1的栅极；第三P型场效应晶体管M3的源极连接高电平，栅极连接信号输入端口K1，漏极连接第二节点；所述第一电容C1的一端连接第一节点N1，另一端连接第二节点N2，且第二节点N2连接信号输出端口K2。
其中，该发射控制电路12中的高低电平均由驱动集成电路11提供，以配合该发射控制电路12中的各个场效应晶体管实现对第一驱动信号S1的反转放大。
可选地，在本发明实施例中，为了进一步改善屏体所呈现的横向Mura现象，驱动集成电路11还用于对待输出的驱动信号的周期进行调整，以使得发送至像素电路14的第二驱动信号S2的周期T1与行周期T2相同。具体地，参照图3(a)所示的现有的时序控制图以及图3(b)所示的本申请的时序控制图可知，现有技术中，第二驱动信号S2的周期T1较大，明显大于行周期T2，且占空比较小，导致一帧内屏体中OLED点亮的时间较长且几乎后续都是连续的，进而Mura现象较为明显。而本申请中第二驱动信号S2的周期T1较小，且与行周期T2相同，且占空比较大，进而，一帧内屏体中OLED点亮的时间较短，且不连续；另外，通过调整数据信号的幅值提升了单位时间的OLED亮度，因而，减弱了横向 Mura现象，提升了显示品质。
此外，考虑到现有的由发射控制电路发出的驱动信号的占空比一般为3％，即点亮时间非常长，而数据写入时间较短。因而，仅需要在驱动集成电路中对待输出的驱动信号进行占空比调整即可，而考虑到由于发射控制电路的不同会导致在驱动集成电路中进行不同的调整，因此，只要保证第二驱动信号的占空比大于3％即可，而一般情况下，待输出的驱动信号的占空比即为现有技术中由发射控制电路发出的驱动信号的占空比。另外，结合经验值以及多次实验，且考虑到硬件的限制，本申请中预设占空比的取值范围可以优选为40％-90％。其中，以60％作为优选值。
另外，该预设占空比的取值选定，不仅可以改善屏体呈现出的横向Mura现象，还可以保证在驱动控制过程中，数据信号能够在足够多的第二驱动信号的高电平持续时间内写入充分。
实施例2
如图4所示为本发明实施例2提供的一种对上述所涉及的驱动控制电路的驱动方法的步骤示意图；该方法主要包括以下步骤：
步骤401：驱动集成电路对待输出的驱动信号的占空比进行调整，生成第一驱动信号，并将第一驱动信号发送至发射控制电路；以及，将待输出的数据信号的幅值调低，生成第一数据信号，并将第一数据信号发送至扫描驱动电路。
步骤402：发射控制电路将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号，并发送至像素电路，其中，第二驱动信号的预设占空比大于所述待输出的驱动信号的占空比。
步骤403：扫描驱动电路发送第一数据信号至像素电路。
其中，步骤402余步骤403的先后顺序不限，一般可以认为按照特定 的时序同时执行。
以下通过具体实例结合图5所示的显示屏A的结构示意图对上述步骤401-步骤404所涉及的方案进行详细说明：
现有一具有横向Mura的显示屏A，该显示屏A上设置有驱动IC，发射控制电路EM，扫描电路S，像素电路M；根据其型号、等确定通过本申请方案所需要调整的占空比的数值，例如，当前输出给像素电路M的驱动信号占空比为3％，现采用本申请方案确定输出给像素电路M的驱动信号占空比为60％才可改善Mura。其中，发射控制电路EM采用图2(b)中的电路结构。
首先，由驱动IC将原有驱动信号占空比由3％提升至40％，生成信号X1，并由驱动IC将信号X1发送至发射控制电路EM，之后，由发射控制电路EM将信号X1进行信号反转并进行放大处理，以得到占空比为60％且具有较强驱动力的信号X2，并将信号X2发送至显示屏A的像素电路M。
同时，驱动IC将原有的数据信号的幅值调低为信号Y1，该幅值具体调整值与该显示屏A的型号、Mura程度等条件有关，可根据具体情况进行参数的调整，并由驱动IC将调整后的信号Y1发送至扫描驱动电路S。扫描驱动电路S对信号Y1进行时序控制，并发送至显示屏A的像素电路M。
最后，由显示屏A的像素电路M根据信号X2及信号Y1对显示屏A进行驱动。
步骤404：在对每一行像素电路进行驱动控制时，若第二驱动信号处于高电平，像素电路关闭；若在写入数据之后且第二驱动信号处于低电平，像素电路打开。
具体地，具体时序控制可结合图3(b)所示，第二驱动信号S2配合扫描驱动电路所发送的扫描信号s1以及数据信号s2对屏体中像素点进行 逐行扫描并写入数据。其中，行同步信号VS的作用为使信号发送端与接收端同步；扫描驱动电路发送的扫描信号s1用于逐行对屏体像素点进行扫描初始化，而扫描驱动电路所发送的数据信号s2用于逐行对屏体像素点进行数据写入，且在对同一行屏体像素点进行驱动并数据写入的过程中，数据信号s2滞后于扫描信号s1。经过扫描驱动并数据写入，第二驱动信号S2为低电压时屏体像素打开，高电压时屏体像素关闭，具有60％占空比的第二驱动信号S2使得屏体所显示的横向Mura显示时间为总体显示时间的40％，由于信号频率较高，并且通过调整数据信号幅值提高屏体单位时间内内显示亮度，从而使横向Mura现象不易被人的视觉捕捉到，改善了屏体呈现出的横向Mura现象，提升显示品质。
实施例3
本发明还提供了一种显示装置，参照图6所示，该显示装置包括上述所涉及的任一驱动控制电路。具体地，驱动集成电路11位于显示装置的非显示区域的一个边缘区域，发射控制电路12和扫描驱动电路13分别设置在显示区域的两侧边缘区域，像素电路14设置在显示区域。其中，该显示装置具体为AMOLED显示装置。此外，该显示装置还包括其他显示模组，例如：显示基板、背板、触控屏等。
以上仅为本申请的实施例而已，并不用于限制本申请。对于本领域技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (9)

  1. 一种驱动控制电路，其特征在于，包括：驱动集成电路，发射控制电路、扫描驱动电路以及像素电路；其中，
    所述驱动集成电路，用于对待输出的驱动信号的占空比进行调整，生成第一驱动信号，并将所述第一驱动信号发送至所述发射控制电路；以及，
    用于将待输出的数据信号的幅值调低，生成第一数据信号，并将所述第一数据信号发送至所述扫描驱动电路；
    所述发射控制电路，连接于所述驱动集成电路与所述像素电路之间，用于将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号，并发送至所述像素电路，其中，所述第二驱动信号的预设占空比大于所述待输出的驱动信号的占空比；
    所述像素电路，用于根据接收到的所述第二驱动信号以及所述扫描驱动电路发出的第一数据信号对相应像素单元进行驱动控制。
  2. 如权利要求1所述的驱动控制电路，其特征在于，所述发射控制电路在将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号时，具体用于：
    对接收到的第一驱动信号进行占空比反转以及电流放大处理，形成具有预设占空比的第二驱动信号。
  3. 如权利要求2所述的驱动控制电路，其特征在于，所述发射控制电路通过一个信号输入端口与所述驱动集成电路连接，且通过一个信号输出端口与所述像素电路连接。
  4. 如权利要求3所述的驱动控制电路，其特征在于，所述发射控制电路包括：第一P型场效应晶体管、第二P型场效应晶体管、第三P型场效应晶体管以及第一电容；
    其中，所述第一P型场效应晶体管的源极连接第一节点，栅极连接第二P型场效应晶体管的漏极，漏极连接低电平；
    所述第二P型场效应晶体管的源极连接第二节点，栅极连接第一节点，漏极连接第一P型场效应晶体管的栅极；
    所述第三P型场效应晶体管的源极连接高电平，栅极连接信号输入端口，漏极连接第二节点；
    所述第一电容的一端连接第一节点，另一端连接第二节点，且所述第二节点连接信号输出端口。
  5. 如权利要求1-4任一项所述的驱动控制电路，其特征在于，所述驱动集成电路还用于对待输出的驱动信号的周期进行调整，以使得所述发送至所述像素电路的第二驱动信号的周期与行周期相同。
  6. 如权利要求1-4任一项所述的驱动控制电路，其特征在于，所述预设占空比的取值范围为40％-90％。
  7. 一种对上述1-6任一项所述的驱动控制电路进行驱动的方法，其特征在于，所述方法包括：
    驱动集成电路对待输出的驱动信号的占空比进行调整，生成第一驱动信号，并将所述第一驱动信号发送至发射控制电路；以及，将待输出的数据信号的幅值调低，生成第一数据信号，并将所述第一数据信号发送至扫描驱动电路；
    所述发射控制电路将接收到的第一驱动信号转换为具有预设占空比的第二驱动信号，并发送至所述像素电路，其中，所述第二驱动信号的预设占空比大于所述待输出的驱动信号的占空比；以及，所述扫描驱动电路发送第一数据信号至所述像素电路；
    在对每一行像素电路进行驱动控制时，若所述第二驱动信号处于高电平，所述像素电路关闭；若在写入数据之后且所述第二驱动信号处于低 电平，所述像素电路打开。
  8. 一种显示装置，其特征在于，包括如权利要求1～6任一项所述的驱动控制电路。
  9. 如权利要求8所述的显示装置，其特征在于，所述显示装置为AMOLED显示装置。
PCT/CN2017/111154 2016-11-29 2017-11-15 一种驱动控制电路及其驱动方法、显示装置 WO2018099267A1 (zh)

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