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Organic light-emitting diode pixel circuit and displayer

A technology of light-emitting diodes and pixel circuits, applied in static indicators, instruments, etc., can solve problems such as inability to drive organic light-emitting diodes correctly, current offset, etc.

Active Publication Date: 2014-02-12
INNOCOM TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the drive transistor degrades over time and its threshold voltage changes over time, causing the supplied current to shift and not properly drive the OLED

Method used

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  • Organic light-emitting diode pixel circuit and displayer
  • Organic light-emitting diode pixel circuit and displayer
  • Organic light-emitting diode pixel circuit and displayer

Examples

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Embodiment Construction

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, the following specific examples will be described in detail with reference to the accompanying drawings.

[0043] figure 1 An organic light emitting diode pixel circuit is illustrated according to an embodiment of the present invention, which includes: organic light emitting diode OLED, driving transistor T_dri, switching transistors TD, TDG and T_SW, capacitors C1, C2 and switching circuit SW. Capacitor C2 can be used depending on the needs of users. In addition, the user can decide whether to further set up the coupling capacitor Cc or Cc' according to the requirement. The symbol C_OLED indicates the bypass capacitor of the organic light emitting diode OLED.

[0044] As shown in the figure, the switching transistor TD, the driving transistor T_dri and the organic light emitting diode OLED are connected in series to a high power supply terminal ELVDD (w...

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PUM

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Abstract

The invention discloses an organic light-emitting diode pixel circuit and a displayer. According to the disclosed pixel circuit, a driving transistor of an organic light-emitting diode is driven to provide a reset operation and a compensation operation for the pixel circuit under control so that a critical voltage numerical value of the driving transistor is memorized on the control end of the driving transistor. In the compensation operation, a connecting point between the driving transistor and the organic light-emitting diode is needed to be particularly controlled. According to the pixel circuit, a switch circuit is disclosed, wherein the connecting point is coupled with a control potential according to a control signal. An enabling interval of the control signal covers effect intervals of the reset operation and the compensation operation.

Description

technical field [0001] The invention relates to a pixel circuit and a display of an organic light-emitting diode (Organic Light-Emitting Diode, OLED). Background technique [0002] Organic light emitting diodes (OLEDs) are usually coupled to a driving transistor, and the driving transistor delivers current to drive them. However, the driving transistor will deteriorate over time, and its threshold voltage will change over time, resulting in a shift in the supplied current and failing to properly drive the OLED. Contents of the invention [0003] This case discloses an OLED pixel circuit and a display. [0004] An organic light emitting diode pixel circuit realized according to an embodiment of the present invention includes: an organic light emitting diode, a driving transistor, first to third switching transistors, a capacitor and a switching circuit. The first switching transistor, the driving transistor and the organic light emitting diode are connected in series betw...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3225
Inventor 郭拱辰曾名骏
Owner INNOCOM TECH SHENZHEN
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