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Pixel circuit, driving method thereof and display panel

A pixel circuit and drive unit technology, applied in static indicators, instruments, etc., can solve problems such as threshold voltage drift, abnormal display, etc., and achieve the effect of improving service life and display effect

Active Publication Date: 2019-01-04
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, an embodiment of the present invention provides a pixel circuit and its driving method, and a display panel, so as to compensate the threshold voltage of devices in the pixel circuit and solve the problem of abnormal display due to threshold voltage drift

Method used

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  • Pixel circuit, driving method thereof and display panel
  • Pixel circuit, driving method thereof and display panel
  • Pixel circuit, driving method thereof and display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] figure 1 A schematic structural diagram of a pixel circuit provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the pixel circuit includes a data writing unit 10 , a compensation unit 20 , a driving unit 30 , a first storage element 40 and a second storage element 50 .

[0045]Wherein, the control terminal B1 of the data writing unit 10 is connected to the scan signal input terminal A1 of the pixel circuit, the first terminal B2 is connected to the data signal input terminal A2 of the pixel circuit, and the second terminal B3 is connected to the first node n1. The control terminal D1 of the compensation unit 20 is connected to the first level signal input terminal A3 of the pixel circuit, and the first terminal D2 is connected to the first node n1. The control terminal E1 of the driving unit 30 is connected to the first node n1, the first terminal E2 is connected to the first electrode H1 of the light emitting element 60, and the second ter...

Embodiment 2

[0082] On the basis of the above embodiments, Embodiment 2 of the present invention provides a display panel, Figure 4 It is a schematic structural diagram of a display panel provided by an embodiment of the present invention. Such as Figure 4 As shown, the display panel 200 includes the pixel circuit 100 of the above embodiment. The display panel 200 may include a plurality of light emitting elements 60 arranged in a matrix. Each pixel circuit 100 is set corresponding to a light emitting element 60 in the display panel 200. The light emitting element 60 is arranged in a Under the action of the driving current generated by the pixel circuit 100, light-emitting display is performed. Figure 4 Only one thin film transistor is used as an example to represent one pixel circuit 100, and the pixel circuit 100 also includes other thin film transistors and storage capacitors.

[0083] Since the second embodiment of the present invention includes the pixel circuit of the above-ment...

Embodiment 3

[0085] On the basis of the above examples, Figure 5 It is a schematic flow chart of a pixel circuit driving method provided by Embodiment 3 of the present invention. The technical solution of this embodiment can be applied in a scene where pixel circuits need to be driven, and can be executed by the pixel circuit provided by the embodiment of the present invention. The method includes:

[0086] S110, the data signal writing phase, the data writing unit and the compensation unit are turned on, and the driving unit is turned off; the data signal is written into the first node through the data writing unit, and written into the second node through the data writing unit and the compensation unit.

[0087] Exemplary, combined with figure 2 and image 3 , can control the first thin film transistor T1 and the second thin film transistor T2 to turn on, the third thin film transistor T3 to turn off, the data signal is written into the first node n1 through the first thin film trans...

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Abstract

The embodiments of the invention disclose a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a data writing unit, a compensation unit, a driving unit, a first storage component and a second storage component; the control end of the data writing unit is connected with a scanning signal input end; the first end of the data writing unit is connected with a datasignal input end; the second end of the data writing unit is connected with a first node; the control end of the compensation unit is connected with a first level signal input end; the first end of the compensation unit is connected with the first node; the control end of the driving unit is connected with the first node; the first end of the driving unit is connected with a light emitting component; the second end of the driving unit is connected with the first level signal input end; the first storage component is located between the first node and a light emitting control signal input end;the second storage component is arranged between the control end of the compensation unit and the second end of the compensation unit; the second electrode of the light emitting component is connected with a second level signal input end; and the driving current of the driving unit is not affected by the threshold voltage of the driving unit. With the above technical schemes of the present invention adopted, under the premise of realizing the compensation function of the pixel circuit, the probability of the failure of a pixel driving circuit and the difficulty of the pixel layout of a high-resolution display device are reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a pixel circuit, a driving method thereof, and a display panel. Background technique [0002] OLED, Organic Light-Emitting Diode (Organic Light-Emitting Diode), also known as organic electroluminescent device, due to its many advantages such as self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, OLED has been obtained more and more widely applied. [0003] According to the driving method, OLED display devices can be divided into passive matrix OLED, namely PMOLED (PassiveMatrix OLED) and active matrix OLED, namely AMOLED (Active Matrix OLED), in which AMOLED has pixels arranged in an array and has higher luminous efficiency , usually used as a high-definition large-size display device. [0004] AMOLED is a current-driven device. When a driving current flows through the organic light-emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 王焕楠刘刚
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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