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OLED pixel compensation circuit

A compensation circuit and pixel technology, applied in the field of pixel compensation circuit, can solve problems such as insufficient precision of compensation voltage extraction, poor pixel compensation effect, etc.

Active Publication Date: 2018-09-07
FUJIAN HUAJIACAI CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0006] To this end, it is necessary to provide a new OLED pixel compensation circuit to solve the problem of insufficient precision of compensation voltage extraction and poor pixel compensation effect in the prior art

Method used

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Embodiment Construction

[0021] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0022] see figure 1 , an OLED pixel compensation circuit, switching tubes T1, T3, T4, T6, the enabling terminals of the switching tubes T1, T3, T6 are connected to the scanning drive signal; the source terminal of T1 is connected to the enabling terminal of T4, and the drain connected to the threshold voltage output terminal; the enabling terminal of T4 is also connected to the drain of T3, and the source of T3 is also connected to the input voltage VDD; the source of T4 is also connected to the input voltage VDD, and the drain of T4 is connected to the OLED The positive electrode is connected; the source terminal of T6 is connected to the positive electrode of the OLED, and the drain of T6 is connected to the reference voltage Vref. ...

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Abstract

An OLED (Organic Light Emitting Diode) pixel compensation circuit comprises switch tubes T1, T3, T4 and T6, enabling terminals of the T1, T3 and T6 are connected with scanning drive signals; a sourceterminal of the T1 is connected with an enabling terminal of the T4, and a drain of the T1 is connected with a threshold voltage output terminal; the enabling terminal of the T4 is connected with a drain of the T3, and the source of the T3 is connected with an input voltage VDD; a source of the T4 is connected with the input voltage VDD, and the drain of the T4 is connected with a positive electrode of the OLED; the source of the T1 is connected with a source of the T6, the source of the T6 is connected with the positive electrode of the OLED, and a drain of the T6 is connected with a reference voltage Vref. The problems are solved that extraction of a compensation voltage is not precious, and the pixel compensation effect is not good.

Description

technical field [0001] The invention relates to OLED panel display technology, in particular to a pixel compensation circuit capable of effectively suppressing the influence of TFTs on OLED luminance. Background technique [0002] Organic light emitting diodes (Organic Light Emitting Diode, OLED) can be divided into passive matrix driving (Passive Matrix OLED, PMOLED) and active matrix driving (Active Matrix OLED, AMOLED) according to the driving method. Among them, the PMOLED does not emit light when data is not written, but only emits light during data writing. This driving method is simple in structure, low in cost, and easy to design, and is mainly suitable for small and medium-sized displays. [0003] Finally, AM stands for Active Matrix, which is relative to Passive Matrix and refers to the driving method of each OLED pixel. In Passive Matrix, the control of each pixel is realized through a complex electrode network, so as to realize the charge and discharge of a cer...

Claims

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Application Information

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IPC IPC(8): G09G3/3233
CPCG09G3/3233
Inventor 不公告发明人
Owner FUJIAN HUAJIACAI CO LTD
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