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OLED pixel driving circuit and display device

A technology of a pixel driving circuit and a driving transistor, which is applied in the field of OLED display, can solve the problem of uneven luminous brightness of organic light emitting diodes OLED, and achieve the effects of improving display effect and service life, multiple functions and simple circuit structure.

Active Publication Date: 2016-06-01
TRULY HUIZHOU SMART DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides an OLED pixel drive circuit and a display device, which effectively compensates the threshold voltage Vth and the power supply voltage drop, solves the problem of uneven luminance of organic light-emitting diodes (OLEDs), and can also avoid organic light-emitting diodes. The long-term DC bias light emitting state of the diode OLED causes the polarization of the organic material of the organic light-emitting diode OLED, which effectively improves the display effect and service life of the display device

Method used

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  • OLED pixel driving circuit and display device

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Embodiment 1

[0029] This embodiment provides an OLED pixel driving circuit, such as figure 1 As shown, it includes first transistor T1, second transistor T2, third transistor T3, fourth transistor T4, fifth transistor T5, drive transistor DTFT, storage capacitor C1, light emitting diode D1, first voltage source VDD, second voltage Source VSS, initialization power supply Vinit, data signal line Data, first node d, second node g, third node s, and fourth node a, and are provided with a first selection signal line S1, a second light emission control line S2, a second Three light control lines S3.

[0030] The first source / drain of the first transistor T1 is connected to the initialization power supply Vinit, the gate is connected to the first selection signal line S1, and the second source / drain is connected to the first node d;

[0031] The first source / drain of the second transistor T2 is connected to the initialization power supply Vinit, the gate is connected to the first selection signa...

Embodiment 2

[0054] This embodiment provides an OLED pixel driving circuit, such as Figure 4 As shown, it includes first transistor T1, second transistor T2, third transistor T3, fourth transistor T4, fifth transistor T5, drive transistor DTFT, storage capacitor C1, light emitting diode D1, first voltage source VDD, second voltage Source VSS, initialization power supply Vinit, data signal line Data, first node d, second node g, third node s, and fourth node a, and are provided with a first selection signal line S1, a second selection signal line S21, a second selection signal line Three light-emitting control lines S3;

[0055] The first source / drain of the first transistor is connected to the initialization power supply Vinit, the gate is connected to the first selection signal line S1, and the second source / drain is connected to the first node d;

[0056] The first source / drain of the second transistor is connected to the initialization power supply Vinit, the gate is connected to the ...

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Abstract

The invention provides an OLED pixel driving circuit and a display device. The OLED pixel driving circuit comprises a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a transistor fifth (T5), a driving transistor (DTFT), a storage capacitor (C1), a light emitting diode (D1), a first voltage source (VDD), a second voltage source (VSS), an initialization power source (Vinit), a data signal line (Data), a first node (d), a second node (g), a third node (s) and a fourth node (a); and the OLED pixel driving circuit is provided with a first selection signal line (S1), a second light emission control line (S2), a third light emission control line (S3), or is provided with a first selection signal line (S1), a selection second signal line (S21) and a third light emission control line (S3). With the OLED pixel driving circuit and the display device of the invention adopted, threshold voltage Vth and power source voltage drop can be effectively supplemented, the problem of organic material polarization of an organic light emitting diode (OLED) can be avoided, and the display effect of the display device can be improved, and the service life of the display device can be prolonged.

Description

technical field [0001] The invention relates to the technical field of OLED display, in particular to an OLED pixel driving circuit and a display device. Background technique [0002] Compared with liquid crystal display devices, organic light emitting diode (Organic Light Emitting Diode, OLED) display devices have advantages such as self-illumination, high contrast, fast response speed, and wide viewing angle. In an organic light emitting diode (OLED) display device, the luminance of the organic light emitting diode (OLED) depends on the driving current flowing through it, and the driving current is generated by the driving transistor of the pixel circuit according to the received data voltage, so the driving Whether the voltage level of each terminal of the transistor is correct and stable directly affects the display screen. [0003] The traditional 2T1C pixel circuit contains two thin film transistors (TFT), one is used as a driving transistor (DTFT) to provide driving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 胡中艺翁祖伟吴锦坤胡君文田栋协谢志生苏君海李建华
Owner TRULY HUIZHOU SMART DISPLAY
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