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A novel amoled pixel driving circuit and driving method

A pixel drive circuit and new technology, applied in static indicators, instruments, etc., can solve the problem of uneven brightness of AMOLED display, and achieve the effect of suppressing IRDrop phenomenon, uniform luminous brightness, and compensating threshold voltage and mobility.

Active Publication Date: 2022-08-02
CHONGQING UNIV OF POSTS & TELECOMM
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  • Description
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Problems solved by technology

[0008] In view of this, the object of the present invention is to provide a novel AMOLED pixel drive circuit and drive method, adding a compensation circuit to each pixel, that is, to compensate the threshold voltage and mobility of the drive thin film transistor in each pixel, and the IRDrop phenomenon , so that the output current becomes irrelevant to these factors, so as to solve the problem of uneven brightness of AMOLED display

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  • A novel amoled pixel driving circuit and driving method
  • A novel amoled pixel driving circuit and driving method
  • A novel amoled pixel driving circuit and driving method

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Embodiment Construction

[0041] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of ​​the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] see Figure 2 to Figure 5 , The present invention designs a new type of AMOLED pixel drive circuit, including: a first thin film transistor T1, a second thin ...

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Abstract

The invention relates to a novel AMOLED pixel driving circuit and a driving method, belonging to the technical field of display. The pixel driving circuit performs threshold voltage compensation by directly grabbing and compensating the threshold voltage of the thin film transistor; applying the voltage of the organic light emitting diode to node B through the parallel connection of the second capacitor and the third capacitor for mobility compensation; controlling the driving by applying an external voltage The gate and source voltages of the thin film transistor to avoid the influence of IR Drop, by compensating the threshold voltage, mobility and IR Drop of the driving thin film transistor, the current flowing through the organic light-emitting diode is stabilized, and the luminous brightness of the organic light-emitting diode is guaranteed, and The uniformity of display improves the display quality of the OLED; the present invention improves the work efficiency, through signal control, the organic light emitting diode only has current passing through the light emitting stage, avoiding unnecessary light emission of the organic light emitting diode and reducing power consumption.

Description

technical field [0001] The invention belongs to the field of display technology, and relates to a novel AMOLED pixel driving circuit and a driving method. Background technique [0002] Organic Light Emitting Display (OLED) display devices have self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, and wide operating temperature range, which can realize flexible display and It has many advantages such as large-area full-color display and is recognized by the industry as the display device with the most development potential. [0003] OLED display devices can be divided into passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED) two categories according to the driving method, namely direct addressing and thin film transistor matrix addressing. . Among them, AMOLED has pixels arranged in an array, is an active display type, has high luminous ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258G09G3/3291G09G3/3266
CPCG09G3/3258G09G3/3291G09G3/3266
Inventor 谢应涛陈鹏龙
Owner CHONGQING UNIV OF POSTS & TELECOMM