Pixel driving circuit

A pixel driving circuit and current technology, applied in instruments, static indicators, etc., can solve the problems of thin film transistor electrical drift, uneven display, etc., and achieve the effect of reducing luminous efficiency attenuation
CN112735337AInactive Publication Date: 2021-04-30SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Publication Date
2021-04-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a pixel driving circuit. The pixel driving circuit comprises a first thin film transistor (T1), a second thin film transistor (T2), a third thin film transistor (T3), a storage capacitor (Cst), an organic light-emitting element (OLED), a photoelectric detector (T4) and a current detector (CS), According to the pixel driving circuit, a photoelectric detector and a current detector are additionally arranged in a 3T1C pixel circuit to detect a current-voltage-brightness curve of a light emitting device, and the magnitude of data voltage needing to be compensated in the pixel driving circuit is calculated by comparing the current-voltage-brightness curve; and the data voltage of the thin film transistor is further compensated, so that the display problem of the OLED device caused by luminous efficiency attenuation is further solved.
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Description

technical field

[0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit. Background technique

[0002] Organic light emitting diode (OLED) is a self-luminous display technology, which has the advantages of wide viewing angle, high contrast ratio, low power consumption, and bright colors. Due to these advantages, the proportion of active matrix organic light emitting diode (AMOLED) in the display industry is increasing year by year. Oxide thin film transistors are widely used in large-size AMOLEDs due to their high mobility and good uniformity. However, as the panel is used for a longer period of time, the electrical properties of the thin film transistor and OLED will drift, and the luminous efficiency of the OLED device will drop significantly, and eventually fail due to problems such as uneven display.

[0003] Therefore, it is urgent to provide a new pixel driving circuit for compensating the data voltage of the ...

Claims

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