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A pixel circuit, its driving method and display panel

A driving method and pixel circuit technology, applied to static indicators, instruments, etc., can solve problems such as leaving horizontal stripes

Active Publication Date: 2020-04-10
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, an embodiment of the present invention provides a pixel circuit, its driving method and a display panel to solve the problem that the existing driving method leaves horizontal stripes

Method used

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  • A pixel circuit, its driving method and display panel
  • A pixel circuit, its driving method and display panel
  • A pixel circuit, its driving method and display panel

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Embodiment Construction

[0049] The specific implementations of the pixel circuit provided by the embodiments of the present invention, its driving method and the display panel will be described in detail below with reference to the accompanying drawings.

[0050] A driving method for a pixel circuit provided in an embodiment of the present invention is based on Figure 6a and Figure 6b For the illustrated pixel circuit with external compensation, for the convenience of description, the display time of each frame is now divided into a light-emitting time period and a blank time period, and the blank time period is divided into: the first time period, the second time period, The third time period, the fourth time period and the fifth time period; the specific driving method is as follows Figure 4 As shown, the following steps may be included:

[0051] S401. In the first time period, apply a first turn-on signal to the first scan signal terminal, apply a second turn-on signal to the second scan sign...

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Abstract

The invention discloses a pixel circuit, its driving method and a display panel. In the blank time period, in order to eliminate the influence of parasitic capacitance on the gate voltage of the driving transistor at the moment when the first switching transistor and the second switching transistor are turned on , firstly, a zero-voltage signal is applied to the data signal terminal. Afterwards, the data signal terminal is loaded with a first-level data signal for a certain period of time, so as to eliminate the hysteresis effect of the driving transistor in the process from being turned off to being turned on by using a bias algorithm. Then load the falling data signal on the data signal end to eliminate the influence of factors such as data coupling. Then, during the process of obtaining the compensation data, the second level data signal is kept loaded on the data signal end, and the sensing signal end is charged after the first switching transistor is turned off, and then the compensation data of the sensing signal end is obtained. Finally, a gain data signal is applied to the data signal end to eliminate dark scanning lines, thereby eliminating the problem of horizontal stripes left during screen switching.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof and a display panel. Background technique [0002] Organic Light Emitting Diode (OLED) display is one of the hot spots in the field of flat panel display research today. Compared with liquid crystal display, OLED display has low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. At present, OLED displays have begun to replace traditional Liquid Crystal Displays (LCDs) in flat panel display fields such as mobile phones, PDAs, and digital cameras. Among them, pixel circuit design is the core technical content of OLED display, which has important research significance. [0003] Unlike LCDs that use voltage to control brightness, OLEDs are driven by current and need to use current to control light emission. For example, in the existing 2T1C pixel circuit, such as figure 1 As shown, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233G09G3/20G09G2320/029G09G2310/08G09G2320/0295G09G2300/0819G09G2300/0842G09G2320/043G09G2320/045G09G2320/0233G09G3/3275G09G3/3258G09G3/3266G09G2310/061
Inventor 徐海侠吴月袁粲鲍文超
Owner BOE TECH GRP CO LTD
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