An oled screen drive circuit with a fuse type anti-short circuit structure

Abstract

The invention discloses an OLED screen body of a fuse-type short-circuit prevention structure, and a screen body drive circuit for providing a compensating current for the OLED screen body when the OLED screen body is short-circuited to burn a short-circuit point, and returning the current to a normal value when the short-circuit point is burnt down. The drive circuit comprises a power supply circuit for supplying power to the OLED screen body, a current compensation circuit for supplementing a current to the OLED screen body, a switching circuit connected between the current compensation circuit and the OLED screen body, and a control circuit. When the control circuit controls the switching circuit to be turned on, the current compensation circuit starts to provide the compensating current for the OLED screen body; when the control circuit controls the switching circuit to be turned off, the current compensation circuit stops the providing of the compensating current for the OLED screen body. The circuit can timely burn down the fuse structure under the condition that the screen body is short-circuited, so as to protect other light emitting regions of the screen body from being affected, and prolong the service life of an OLED product.

Description

technical field [0001] The present disclosure generally relates to the technical field of lighting screens, specifically relates to a driving circuit of an OLED screen body, and especially relates to a driving circuit of an OLED screen body with a fuse type anti-short circuit structure. Background technique [0002] Most of the circuit devices used to drive organic light emitting diodes are to detect open circuit or short circuit of light emitting diodes and perform circuit protection to prevent other dangers. In the fuse-type anti-short-circuit OLED screen drive circuit, after the low-current screen pixels are short-circuited, the fusing mechanism is difficult to function, which will cause the OLED screen to fail. [0003] Based on the current OLED fusing anti-short circuit design, when there is a pixel short circuit, the current of the OLED is very small, and the fusing anti-short circuit mechanism is difficult to function under very small currents, so the fusing circuit d...

AI Technical Summary

Problems solved by technology

In the fuse-type anti-short-circuit OLED screen drive circuit, after the low-current screen pixels are short-circuited, the fusing mechanism is difficult to function, which will cause the OLED screen to fail

[0003] Based on the current OLED fusing anti-short circuit design, when there is a pixel short circuit, the current of the OLED is very small, and the fusing anti-short circuit mechanism is difficult to function under very small currents, so the fusing circuit design of the OLED screen cannot provide protection. The role of the OLED screen affects the service life of the OLED screen

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