Pixel unit driving circuit and display device

A pixel unit and drive circuit technology, applied in the field of pixel unit drive circuits and display devices, can solve the problems of display effect obstruction, voltage drop, data signal Vdata voltage drop, etc., achieve the effect of maintaining stable luminous brightness and improving display effect

Active Publication Date: 2016-02-03
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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Problems solved by technology

However, since one of the main components of the compensation circuit is usually a thin film transistor, the thin film transistor inevitably has different degrees of leakage, which will cause the voltage at the second terminal of the storage capacitor Cst to drop, that is, cause the voltage of the data signal Vdata stored in the storage capacitor Cst to drop, As a result, it is difficult to maintain a stable luminance of the organic light-emitting diode OLED, which ultimately hinders the further improvement of the display effect.

Method used

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  • Pixel unit driving circuit and display device
  • Pixel unit driving circuit and display device
  • Pixel unit driving circuit and display device

Examples

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Embodiment Construction

[0065] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0066] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, one skilled in the art will appreciate tha...

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Abstract

The invention provides a pixel unit drive circuit and a display device. The pixel unit drive circuit comprises an organic light-emitting diode, a drive transistor, a switch transistor, a storage capacitor and a compensation circuit. The first end of the storage capacitor is connected with the first end of a power supply, and the second end of the storage capacitor is connected with the drain electrode of the switch transistor, the grid electrode of the drive transistor and the compensation circuit. The pixel unit drive circuit further comprises a voltage negative feedback circuit which is respectively connected with the second end of the storage capacitor and the first end of the power supply, and the voltage negative circuit is used for adjusting voltage of the second end of the storage capacitor reversely according to changes of voltage at the second end of the storage capacitor. In the pixel unit drive circuit, data signal voltage stored in the storage capacitor relatively keeps stable, and accordingly the light-emitting brightness of the organic light-emitting diode can keep stable and the display effect is improved.

Description

technical field [0001] The present disclosure relates to the field of display technology, and in particular to a pixel unit driving circuit and a display device including the pixel unit driving circuit. Background technique [0002] Compared with traditional liquid crystal panels, OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) panels have the characteristics of faster response speed, higher contrast ratio, wider viewing angle, etc. Therefore, OLED technology has received increasing attention from display technology developers. [0003] A pixel unit in an OLED panel mainly includes an organic light emitting diode and a pixel unit driving circuit for driving the organic light emitting diode. The traditional 2T1C pixel unit driving circuit such as figure 1 As shown in: it includes a switching transistor T1, a driving transistor T2 and a storage capacitor Cst. Wherein, the switching transistor T1 is controlled by the first scanning signal Vscan output by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233G09G3/3258
Inventor 周兴雨
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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