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A pixel driving circuit, pixel driving method and display device

A technology of pixel drive circuit and drive unit, which is applied to static indicators, instruments, etc., and can solve problems such as long detection time and low accuracy of detection results

Active Publication Date: 2019-05-07
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a pixel driving circuit, a pixel driving method and a display device, so as to solve the problem that the detection result of the threshold voltage of the driving transistor in the existing pixel driving circuit is not accurate and the detection time is not high. long technical question

Method used

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  • A pixel driving circuit, pixel driving method and display device
  • A pixel driving circuit, pixel driving method and display device
  • A pixel driving circuit, pixel driving method and display device

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Embodiment 1

[0055] figure 2 A schematic structural diagram of a pixel driving circuit provided for an embodiment of the present invention, such as figure 2 As shown, the pixel driving circuit provided by the embodiment of the present invention is used for driving light-emitting elements, including: a first control unit, a second control unit, a third control unit, an energy storage unit and a driving unit.

[0056] In this embodiment, the first control unit is respectively connected to the data signal terminal Data, the first signal control terminal V1 and the first node a, and is used to provide the first node a under the control of the first signal control terminal V1 The signal of the data signal terminal Data; the second control unit is respectively connected with the second node b, the fourth node d, the second signal control terminal V2, the third signal control terminal V3 and the first power supply terminal VDD, for the third Under the control of the signal control terminal V3,...

Embodiment 2

[0091] Based on the inventive concepts of the foregoing embodiments, Image 6 The flow chart of the pixel driving method provided by the embodiment of the present invention, such as Image 6 As shown, the pixel driving method provided in the embodiment of the present invention is implemented by using the pixel driving circuit provided in Embodiment 1, and specifically includes the following steps:

[0092] Step 100, in the reset phase, the first control unit provides the signal of the data signal terminal to the first node under the control of the first signal control terminal; the second control unit provides the first signal to the fourth node under the control of the third signal control terminal. The signal of the power supply terminal provides the signal of the fourth node to the second node under the control of the third signal control terminal; the third control unit provides the signal of the second power supply terminal to the third node under the control of the fourt...

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Abstract

The embodiment of the present invention discloses a pixel driving circuit, a pixel driving method and a display device. The circuit includes: under the control of the first signal control terminal, a first control unit that provides the signal of the data signal terminal to the first node; Under the control of the signal control terminal, the second control unit that provides the signal of the first power supply terminal to the fourth node and under the control of the second signal control terminal provides the signal of the fourth node to the second node, under the control of the fourth signal control terminal , the third control unit that provides the signal of the second power terminal to the third node, the energy storage unit that stores the potential between the first node and the second node, and under the control of the second node and the fourth node, the third node The driving unit that sends the driving current for driving the light-emitting element, the invention uses the third control unit to short-circuit the light-emitting element during the threshold detection stage, which improves the accuracy of the threshold detection result and reduces the time required for threshold voltage detection.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, in particular to a pixel driving circuit, a pixel driving method, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) display is one of the hotspots in the field of display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, low production cost, self-luminescence, Wide viewing angle and fast response speed etc. advantages. [0003] Among them, the pixel driving circuit is the core technology of the OLED display. In the OLED display, the pixel driving circuit needs to detect the threshold voltage of the driving transistor to output a stable current to control the OLED to emit light. [0004] The inventors found that the detection result of the threshold voltage of the driving transistor is not accurate and the detection time is too long because the existing pixel driving circuit ignores the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G3/3233G09G2300/0819G09G2300/0842G09G2310/0262G09G2320/045G09G3/325G09G3/3275G09G2300/043
Inventor 胡琪敬辉廖伟经
Owner BOE TECH GRP CO LTD