WO2015176420A1 - Circuit de pixel, son procédé d'attaque et son dispositif d'affichage - Google Patents

Circuit de pixel, son procédé d'attaque et son dispositif d'affichage Download PDF

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Publication number
WO2015176420A1
WO2015176420A1 PCT/CN2014/086311 CN2014086311W WO2015176420A1 WO 2015176420 A1 WO2015176420 A1 WO 2015176420A1 CN 2014086311 W CN2014086311 W CN 2014086311W WO 2015176420 A1 WO2015176420 A1 WO 2015176420A1
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Prior art keywords
module
compensation
emitting device
driving voltage
voltage
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PCT/CN2014/086311
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English (en)
Chinese (zh)
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王颖
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京东方科技集团股份有限公司
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Publication of WO2015176420A1 publication Critical patent/WO2015176420A1/fr

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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]

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a pixel circuit, a driving method thereof, and a display device.
  • the luminance of the OLED device is proportional to the driving current and exponentially related to the driving voltage; in the state of low gray scale display Under the IGBT device, the driving voltage has a significant influence on the change of its illuminance.
  • the electrical performance of OLED devices is attenuated with increasing use time. The voltage drop of OLED devices will increase during use, that is, as the use time increases, OLED devices are used when driving OLED devices with the same driving voltage. The brightness of the image is lowered, resulting in uneven display brightness, which affects the display of the entire image.
  • the OLED device belongs to a current driving device, and requires a stable current to control the light emission.
  • the threshold voltage Vth of the driving transistor of the pixel circuit is uneven, which causes the flow to flow.
  • the current of the OLED at each pixel changes to make the display brightness uneven, which also affects the display of the entire image.
  • a pixel circuit having an internal compensation function includes a driving transistor T1, a switching transistor T2, an input control circuit module, a capacitor C, and an OLED device.
  • the internal compensation circuit can be used to make the driving voltage for driving the light emitting device to be related only to the data signal voltage input at the data signal end, irrespective of the threshold voltage of the driving transistor, and the threshold voltage can be avoided for the light emitting device.
  • the effect cannot eliminate the phenomenon that the voltage drop of the OLED device will increase during use, making the display brightness uneven, affecting the display effect of the entire image.
  • the embodiment of the present invention provides a pixel circuit, a driving method thereof, and a display device, which are used to solve the problem that the brightness of the display panel is uneven due to the decrease of the brightness of the light-emitting device. question.
  • An embodiment of the present invention provides a pixel circuit, including a light emitting device and a driving module for providing a driving voltage for the light emitting device, further comprising: a sampling module, a compensation module, and a processing module;
  • An input end of the sampling module is connected to an output end of the driving module, and the sampling module is configured to sample a driving voltage provided by the driving module;
  • An input end of the processing module is connected to an output end of the sampling module, the processing module is configured to use a driving voltage sampled according to the sampling module, and a pre-stored brightness of the light emitting device according to a usage time Determining a corresponding voltage with a corresponding voltage to determine a compensation voltage corresponding to the driving voltage;
  • An input end of the compensation module is connected to an output end of the processing module, and the compensation module is configured to input a compensation voltage determined by the processing module to the light emitting device.
  • the sampling module samples the driving voltage
  • the processing module processes according to the driving voltage sampled by the sampling module, and the pre-stored light emitting device.
  • the brightness of the light-emitting brightness is matched with the driving voltage according to the change of the use time, and the compensation voltage corresponding to the driving voltage is obtained, and the compensation module inputs the compensation voltage determined by the processing module to the corresponding light-emitting device, thereby realizing the use time of the light-emitting device.
  • the sampling module includes: a first thin film transistor and a second thin film transistor;
  • the gate of the first thin film transistor is electrically connected to the sampling signal control end, and the sampling signal control end is configured to control the sampling module to be in an on state during a sampling period;
  • a drain of the first thin film transistor is electrically connected to a source of the second thin film transistor and an output end of the driving module
  • a source of the first thin film transistor is electrically connected to a gate of the second thin film transistor
  • the drain of the second thin film transistor is electrically connected to the input end of the processing module.
  • the compensation module includes: a third thin film transistor and a fourth thin film transistor: wherein
  • the gate of the third thin film transistor is electrically connected to the compensation signal control end, and the compensation signal control end is configured to control the compensation module to be in an on state during the compensation period;
  • a drain of the third thin film transistor is electrically connected to a source of the fourth thin film transistor and an output end of the processing module;
  • the third thin film transistor source is electrically connected to the gate of the fourth thin film transistor
  • the drain of the fourth thin film transistor is electrically connected to the input end of the light emitting device.
  • the input end and the output end of the processing module are the same port; the sampling signal control end or the compensation signal control end is time-sharing The sampling module or the compensation module corresponding to the driving is in an on state.
  • the foregoing pixel circuit provided by the embodiment of the present invention further includes: connecting between an output end of the sampling module and an input end of the processing module, and connected to the compensation module a cache module between the input end and the output end of the processing module; the cache module is configured to buffer a driving voltage signal sampled by the sampling module or a compensation voltage signal determined by the processing module.
  • the cache module includes a capacitor, one end of the capacitor is grounded, and the other end is connected to an output end of the sampling module and the processing module. Between the inputs and between the input of the compensation module and the output of the processing module.
  • the processing module includes:
  • An analog-to-digital conversion unit configured to convert an analog signal of a driving voltage sampled by the sampling module into a corresponding digital signal
  • a storage unit configured to store a correspondence between a change in the light-emitting brightness of the light-emitting device that is established in advance and a driving voltage according to a change in use time
  • a determining unit configured to determine, according to the digital signal converted by the analog-to-digital conversion unit, and the pre-stored light-emitting luminance of the light-emitting device, corresponding to a change in usage time and a driving voltage, to determine a corresponding to the driving voltage Digital signal of the compensation voltage;
  • a digital-to-analog conversion unit configured to convert the digital signal of the compensation voltage determined by the determining unit into a corresponding analog signal.
  • An embodiment of the present invention provides a display device, including any of the above pixel circuits provided by the embodiments of the present invention.
  • Embodiments of the present invention provide a driving method of a pixel circuit, including:
  • the sampling module samples the driving voltage, and inputs the sampled driving voltage to the processing module under the control of the sampling signal control end;
  • the processing module determines the compensation voltage corresponding to the driving voltage according to the driving voltage sampled by the sampling module and the pre-stored brightness of the light-emitting device, and the corresponding relationship between the driving time and the driving voltage. And inputting the compensation voltage to the compensation module;
  • the compensation module inputs the compensation voltage determined by the processing module to the light emitting device under the control of the compensation signal control terminal.
  • the processing module is configured according to the driving voltage sampled by the sampling module, and the pre-stored brightness of the light emitting device.
  • the compensation voltage corresponding to the driving voltage is determined according to the corresponding relationship between the change of the use time and the driving voltage, and specifically includes:
  • An analog-to-digital conversion unit in the processing module converts an analog signal of a driving voltage sampled by the sampling module into a corresponding digital signal
  • the digital-to-analog conversion unit in the processing module converts the digital signal of the compensation voltage determined by the determining unit into a corresponding analog signal.
  • FIG. 1 is a schematic structural view of a pixel circuit using internal compensation in the prior art
  • FIG. 2 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention.
  • FIG. 4 is a timing chart of operation of a sampling signal control end and a compensation signal control end in a pixel circuit according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of an analog-to-digital conversion circuit according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a digital-to-analog conversion circuit according to an embodiment of the present invention.
  • FIG. 7 is a corresponding relationship diagram between light emission luminance and driving voltage of a light emitting device according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a driving method of a pixel circuit according to an embodiment of the present invention.
  • a pixel circuit as shown in FIG. 2, includes a light emitting device 01 and a driving module 02 for providing a driving voltage for the light emitting device, and further includes: a sampling module 03, a compensation module 04, and a processing module 05. ;among them,
  • sampling module 03 The input end of the sampling module 03 is connected to the output end of the driving module 02, and the sampling module 03 is used to sample the driving voltage provided by the driving module 02;
  • the input end of the processing module 05 is connected to the output end of the sampling module 03.
  • the processing module 05 is configured to determine and drive according to the driving voltage sampled by the sampling module 03 and the corresponding relationship between the brightness of the light-emitting device 01 and the driving voltage stored in advance.
  • the input of the compensation module 04 is connected to the output of the processing module 05, and the compensation module 04 is used to input the compensation voltage determined by the processing module 05 to the light-emitting device.
  • the driving module 02 provides a driving voltage for the light emitting device 01, and when the driving module 02 inputs a driving voltage to the light emitting device 01, the sampling module 03 samples the driving voltage, and The sampled driving voltage is output to the processing module 05; the processing module 05 processes the sampling voltage, determines a compensation voltage corresponding to the driving voltage, and outputs the compensation voltage to the compensation module 04; the compensation module 04 determines the compensation voltage determined by the processing module 05. Input to the light emitting device 01.
  • the sampling module 03 samples the driving voltage
  • the processing module 05 processes according to the driving voltage sampled by the sampling module 03
  • the pre-stored light-emitting luminance of the light-emitting device 01 is a compensation voltage corresponding to the driving voltage according to the corresponding relationship between the change of the use time and the driving voltage
  • the compensation module 04 inputs the compensation voltage determined by the processing module 05 to the corresponding light-emitting device.
  • the display 01 which realizes different compensation functions for the driving voltage of the light emitting device 01 according to the use time of the light emitting device 01, and avoids the occurrence of the light emitting device 01 when the light emitting device 01 is driven by the same driving voltage as the use time of the light emitting device 01 increases.
  • the brightness of the light-emitting device is lowered, and the display brightness of the display panel is uneven, which improves the uniformity of display brightness of the display panel.
  • the driving mode is The block 02 can be the same as the prior art, and adopts an internal compensation circuit, and specifically includes: an input control module, a capacitor Cst, a driving transistor DTFT, and a switching transistor STFT.
  • the driving module 02 and the compensation module 04 jointly provide the compensated driving voltage for the light emitting device 01 through the node N1; wherein the driving current input to the light emitting device 01 is:
  • V up module 04 to compensate for output voltage compensation.
  • the driving voltage of the light emitting device 01 is compensated, and the brightness reduction caused when the light emitting device 01 drives the light emitting device 01 with the same driving voltage with the increase of the use time is avoided.
  • the problem that the display panel is uneven in brightness is improved, and the uniformity of display brightness of the display panel is improved.
  • V gs, DTFT is the potential difference between the gate and source of the driving transistor DTFT
  • ⁇ is the carrier mobility
  • Cox is the gate insulating layer capacitance
  • W/L is the transistor width to length ratio
  • Vdata is the data voltage
  • Vdd For the supply voltage
  • Vth is the threshold voltage of the drive transistor DTFT.
  • the driving transistor DTFT of the driving module 02 may be a P-type transistor or an N-type transistor, which is not limited herein.
  • the above-mentioned light-emitting device 01 generally refers to an organic light-emitting diode (OLED), and may of course be other electroluminescent devices, which is not limited herein.
  • OLED organic light-emitting diode
  • the sampling module 03 in the pixel circuit may specifically include: a first thin film transistor T1 and a second thin film transistor T2; ,
  • the gate of the first thin film transistor T1 is electrically connected to the sampling signal control terminal SW1, and the sampling signal control terminal SW1 is configured to control the sampling module 03 to be in an on state during the sampling period;
  • a drain of the first thin film transistor T1 is electrically connected to a source of the second thin film transistor T2 and an output end of the driving module 02;
  • the source of the first thin film transistor T1 is electrically connected to the gate of the second thin film transistor T2;
  • the drain of the second thin film transistor T2 is electrically connected to the input end of the processing module 05.
  • the first thin film transistor T1 and the second thin film transistor T2 of the sampling module 03 can be N-type transistors or P-type transistors at the same time. There is no limit here.
  • the first thin film transistor T1 and the second thin film transistor T2 are P-type transistors.
  • the sampling module 03 provided by the embodiment of the present invention receives the low-level signal when the sampling signal control terminal SW1 receives the low-level signal.
  • the transistor T1 and the second thin film transistor T2 are in an on state, and constitute a unidirectional signal path from the output end of the driving module 02 to the input end of the processing module 05, that is, the output of the driving module 02 under the control of the sampling signal control terminal SW1.
  • the drive voltage is sampled. Moreover, according to the connection relationship between the first thin film transistor T1 and the second thin film transistor T2, the transmission direction of the signal in the sampling module 03 can only be single-passed from the output end of the driving module 02 to the input end of the processing module 05, To the end.
  • the compensation module 04 of the pixel circuit may specifically include: a third thin film transistor T3 and a fourth thin film transistor T4;
  • the gate of the third thin film transistor T3 is electrically connected to the compensation signal control terminal SW2, and the compensation signal control terminal SW2 is used to control the compensation module 04 to be in an on state during the compensation period;
  • a drain of the third thin film transistor T3 is electrically connected to a source of the fourth thin film transistor T4 and an output end of the processing module 05;
  • the source of the third thin film transistor T3 is electrically connected to the gate of the fourth thin film transistor T4;
  • the drain of the fourth thin film transistor T4 is electrically connected to the input end of the light emitting device.
  • the third thin film transistor T3 and the fourth thin film transistor T4 of the compensation module 04 may be N-type transistors or P-type transistors at the same time, which is not limited herein.
  • the third thin film transistor T3 and the fourth thin film transistor T4 are P-type transistors.
  • the compensation module 04 provided by the embodiment of the present invention receives the low-level signal when the compensation signal control terminal SW2 receives the third film.
  • the transistor T3 and the fourth thin film transistor T4 are in an on state, and constitute a unidirectional signal path from the output end of the processing module 05 to the input end of the light emitting device 01, that is, the output of the processing module 05 under the control of the compensation signal control terminal SW2.
  • the compensation voltage is input to the input terminal of the light emitting device 01.
  • the transmission direction of the signal in the compensation module 04 can only be single-passed from the output end of the processing module 05 to the input end of the light-emitting device 01. To the end.
  • the sampling module 03 and the compensation module 04 and the driving module 02 and the light emitting device 01 are generally disposed in a display area of the display panel, and the processing module is 05 is set in the non-display area.
  • the processing module is 05 is set in the non-display area.
  • the input end and the output end of the processing module 05 are set to be the same port, that is, the output end of the sampling module 03 and the input end of the compensation module 04 are commonly connected to one port of the processing module 05.
  • the sampling signal control terminal SW1 or the compensation signal control terminal SW2 is required to be time-divisionally required.
  • the corresponding sampling module 03 or the compensation module 04 is driven to be in an on state, and the sampling timing of the sampling signal control terminal SW1 and the compensation signal control terminal SW2 is as shown in FIG. 4 . In this way, the unidirectionality of the signal flow is ensured, so that the sampling process and the compensation process are not interfered by external signals.
  • the foregoing pixel circuit provided by the embodiment of the present invention may further include an output connected between the output end of the sampling module 03 and the input end of the processing module 05, and connected to the input end of the compensation module 04 and the output of the processing module 05.
  • Cache module 06 between the ends. As shown in FIG. 3, the cache module 06 can buffer the drive voltage signal sampled by the sampling module 03 or the compensation voltage signal determined by the processing module 05. In this way, the buffering module 06 is used to buffer the sampling voltage signal or the compensation voltage signal, and on the one hand, the current to voltage signal conversion can be performed, and on the other hand, the working timing of the corresponding sampling signal control terminal SW1 or the compensation signal control terminal SW2 is reduced, and the implementation is reduced. Externally compensated real-time data read and write refresh frequency, thereby reducing power consumption.
  • the cache module 06 in the pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3, may be a capacitor C1.
  • One end a of the capacitor C1 is connected to the output end of the sampling module 03 and the processing module 05. Between the inputs, and between the input of the compensation module 04 and the output of the processing module 05, the other end b is grounded.
  • the driving voltage of the light emitting device 01 can be preferably sampled or compensated, thereby compensating for the attenuation of the electrical performance of the light emitting device 01 to ensure The display system displays the uniformity of brightness.
  • the analog-to-digital conversion unit 051 is configured to convert an analog signal of the driving voltage sampled by the sampling module 03 into a corresponding digital signal;
  • a storage unit 052 configured to store a correspondence between a change in the brightness of the light-emitting device 01 that is established in advance and a driving voltage as a function of the time of use;
  • a determining unit 053 configured to perform a digital signal converted according to the analog-to-digital conversion unit 051, and a corresponding relationship between a change in the light-emitting brightness of the light-emitting device and the driving voltage Determining a digital signal of a compensation voltage corresponding to a driving voltage;
  • the digital-to-analog conversion unit 054 is configured to convert the digital signal of the compensation voltage determined by the determining unit 053 into a corresponding analog signal.
  • FIG. 5 and FIG. 6 respectively show circuit diagrams of the analog-to-digital conversion unit and the digital-to-analog conversion unit. Since the working principle of the analog-to-digital conversion circuit and the digital-to-analog conversion circuit is the same as that of the prior art, the repeated description will not be repeated here.
  • the corresponding relationship between the light-emitting luminance and the driving voltage of the light-emitting device 01 stored in the memory unit in the processing module 05 in the pixel circuit provided by the embodiment of the present invention is based on the VL curve of the light-emitting device 01, that is, the light-emitting device 01.
  • the corresponding relationship between the time and the driving voltage of the monochrome light-emitting luminance is as shown in FIG. 7, and the corresponding look-up table is established and stored in the storage unit 052 in advance.
  • the processing module 05 determines a compensation voltage corresponding to the driving voltage according to a look-up table of the corresponding relationship between the light-emitting luminance of the light-emitting device 01 and the driving voltage, which is stored in advance by the storage unit 052, and outputs the compensation voltage to the compensation module 04.
  • the compensation module 04 outputs the compensation voltage to the light emitting device 01 to compensate the driving voltage of the light emitting device 01, thereby compensating for the attenuation of the electrical performance of the light emitting device, thereby avoiding the use of the same driving due to the increase of the use time of the light emitting device 01.
  • the voltage is driven to the light-emitting device 01, the brightness is lowered, and the display brightness of the display panel is uneven, which improves the uniformity of display brightness of the display panel and ensures uniformity of display brightness of the display system.
  • an embodiment of the present invention further provides a display device, including any of the above pixel circuits provided by the embodiments of the present invention. Since the principle of solving the problem of the display device is similar to that of the pixel circuit, the implementation of the display device can be referred to the implementation of the pixel circuit, and the repeated description is omitted.
  • the above display device provided by the embodiment of the present invention can be applied to a liquid crystal display panel, and can also be applied to an organic electroluminescence display panel, which is not limited herein.
  • the display device may be a display, a mobile phone, a television, a notebook, an all-in-one, etc., and other essential components of the display device are understood by those of ordinary skill in the art, and will not be described herein. As a limitation of the invention.
  • an embodiment of the present invention further provides a driving method of a pixel circuit, as shown in FIG. 8 , including the following steps:
  • the sampling module samples the driving voltage, and inputs the sampled driving voltage to the processing module under the control of the sampling signal control end;
  • the sampling module may sample the driving voltage between each frame in which the driving module inputs the driving voltage to the light emitting device, and may also sample the driving voltage in each frame time, which is not limited herein;
  • the processing module determines a compensation voltage corresponding to the driving voltage according to a driving voltage sampled by the sampling module and a corresponding relationship between the driving brightness and the driving brightness of the pre-stored light-emitting device, and inputs the compensation voltage to the compensation voltage.
  • Compensation module determines a compensation voltage corresponding to the driving voltage according to a driving voltage sampled by the sampling module and a corresponding relationship between the driving brightness and the driving brightness of the pre-stored light-emitting device, and inputs the compensation voltage to the compensation voltage.
  • the compensation module inputs the compensation voltage determined by the processing module to the light emitting device under the control of the compensation signal control end.
  • the sampling module samples the driving voltage
  • the processing module processes according to the driving voltage sampled by the sampling module, and pre-stores
  • the illuminating brightness of the illuminating device is matched with the driving voltage according to the change of the use time, and the compensation voltage corresponding to the driving voltage is obtained, and the compensation module inputs the compensation voltage determined by the processing module to the corresponding illuminating device, thereby realizing the illuminating according to the illuminating device.
  • the different use time of the device compensates the driving voltage of the light-emitting device differently, which avoids the decrease of the brightness of the light-emitting device when the light-emitting device drives the light-emitting device with the same driving voltage as the light-emitting device increases with the use time.
  • the problem that the display panel is uneven in brightness is improved, and the uniformity of display brightness of the display panel is improved.
  • the processing module according to the driving voltage sampled by the sampling module and the corresponding brightness of the light emitting brightness of the light emitting device with the driving time according to the change of the use time
  • the relationship, determining the compensation voltage corresponding to the driving voltage can be achieved in the following manner:
  • the analog-to-digital conversion unit in the processing module converts the analog signal of the driving voltage sampled by the sampling module into a corresponding digital signal
  • the determining unit in the processing module determines to compensate the light emitting device according to the digital signal converted by the analog-to-digital conversion unit and the corresponding relationship between the change of the light-emitting brightness of the light-emitting device and the driving voltage stored in advance by the storage unit.
  • Digital signal of the compensation voltage
  • the digital to analog conversion unit in the processing module converts the digital signal of the compensation voltage determined by the determination unit into a corresponding analog signal.
  • the embodiment of the present invention provides a pixel circuit, a driving method thereof, and a display device.
  • the driving module provides a driving voltage for the light emitting device
  • the sampling module samples the driving voltage and processes the pixel. The module is based on the driving voltage sampled by the sampling module.
  • the compensation function of the driving voltage of the light emitting device is different according to the use time of the light emitting device, thereby avoiding the brightness of the light emitting device which occurs when the light emitting device drives the light emitting device with the same driving voltage as the light emitting device increases with the use time.
  • the problem of uneven display brightness of the display panel caused by the decrease is improved, and the uniformity of display brightness of the display panel is improved.

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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)

Abstract

L'invention concerne un circuit de pixel, son procédé d'attaque, et son dispositif d'affichage. Dans le circuit de pixel, lorsqu'un module d'attaque (02) fournit une tension d'attaque à un dispositif d'émission de lumière (01), un module d'échantillonnage (03) échantillonne la tension d'attaque, un module de traitement (05) effectue un traitement en fonction de la tension d'attaque échantillonnée par le module d'échantillonnage ainsi que d'une relation de correspondance entre la luminance pré-stockée du dispositif d'émission de lumière (01) et la tension d'attaque en fonction du temps de service, de manière à obtenir une tension de compensation correspondant à la tension d'attaque; un module de compensation (04) entre la tension de compensation déterminée par le module de traitement (05) dans le dispositif émetteur de lumière correspondant (01). Ainsi, la fonction de compensation différente pour la tension d'attaque du dispositif d'émission de lumière conformément à un temps de service différent du dispositif émetteur de lumière (01) permet de résoudre le problème selon lequel la luminance d'affichage non uniforme d'un panneau d'affichage est provoquée par une diminution de la luminance du dispositif émetteur de lumière (01) pendant le temps de service du dispositif émetteur de lumière (01) lorsque la même tension d'attaque est utilisée pour attaquer le dispositif émetteur de lumière (01), et permet d'améliorer l'uniformité de luminance d'affichage du panneau d'affichage.
PCT/CN2014/086311 2014-05-22 2014-09-11 Circuit de pixel, son procédé d'attaque et son dispositif d'affichage WO2015176420A1 (fr)

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CN201410219292.8A CN104021755B (zh) 2014-05-22 2014-05-22 一种像素电路、其驱动方法及显示装置

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CN107331346A (zh) * 2017-08-18 2017-11-07 深圳市华星光电半导体显示技术有限公司 显示设备的亮度调节装置及亮度调节方法、显示设备
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