Pixel recession compensation circuit of silicon-based organic light emitting micro-display

Abstract

The invention relates to a pixel recession compensation circuit of a silicon-based organic light emitting micro-display. The compensation circuit is formed by a pixel unit circuit, an anode pressure reading-out circuit and a reference current generating circuit. The pixel unit circuit comprises three switch transistors, a driving transistor, a storage capacitor and an organic light emitting diode. The grid electrode of the first switch transistor is connected with a line driving signal, the drain electrode is connected with a row driving signal, and the source electrode is connected with the grid electrode of the third switch transistor. When the first switch transistor carries out line gating, the line driving signal is written into the storage capacitor so as to control the state of the third switch transistor. The drain electrode of the third switch capacitor is connected with the anode of the organic light emitting diode and the source electrode is connected with the drain electrode of the driving transistor. The source electrode of the driving transistor is connected with a positive power supply and the grid electrode is connected with reference current of the reference current generating circuit. The reading-out circuit is formed by the second switch transistor, the grid electrode of the reading-out circuit is connected with a reading-out signal and the source electrode is connected with the anode of the organic light emitting diode. When the reading-out signal is valid, the drain electrode of the second switch transistor outputs anode voltage.

Description

Technical field [0001] The invention relates to a pixel degradation compensation circuit of a silicon-based organic light-emitting microdisplay. Background technique [0002] Silicon-based organic light-emitting diodes (OLED-on-Silicon, OrganicLightEmittingDiodeonSilicon) are a combination of organic light-emitting diodes and monocrystalline silicon integrated circuits. CMOS process has the characteristics of low cost and small size, which is the cornerstone of the integrated circuit industry; OLED has the advantages of low power consumption, self-luminous, wide viewing angle, low cost, good temperature adaptability, and fast response speed. The advantages of the combination of the two make silicon-based organic light-emitting diodes a new type of display technology that has attracted much attention. [0003] Generally, a display with a screen diagonal of less than 3.3 cm is defined as a micro display. The size of the micro display itself is small, but it can achieve a super larg...

AI Technical Summary

Problems solved by technology

When OLED displays high-contrast and high-brightness displays for a long time, the OLED pixels decay inconsistently, resulting in poor luminous consistency. When the screen is refreshed, blurred afterimages will be observed. The place where the original luminous brightness is dark decays slowly, and the luminous light will be brighter. , and the place where the original luminous brightness is high decays faster, and the luminous light will be dim

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