A kind of driving method and device of oled lighting screen body

Abstract

Based on a certain technical solution in this application, after a fault occurs, the reverse drive voltage mode can be activated, that is, a reverse voltage is applied to the OLED lighting screen, so that the pixels that are about to have problems or have already appeared on the OLED lighting screen The problematic pixels focus on blowing the fuse through current to prevent hidden dangers before the next use. This method improves the reliability and user experience of OLED products. Based on another technical solution in this application, before the failure occurs, the reverse drive voltage mode can be activated, that is, the reverse voltage is applied to the OLED lighting screen to concentrate the pixels that have problems in the OLED lighting screen through the current. Fuse the fuse to prevent hidden dangers before the next use, and improve the reliability and user experience of OLED products through this method.

Description

technical field [0001] The present disclosure generally relates to the technical field of OLED lighting screens, and in particular to a driving method and device for OLED lighting screens. Background technique [0002] The basic structure of organic electroluminescent devices (Organic Light Emitting Devices, referred to as OLED) is: an organic light-emitting unit is arranged in a closed space formed by a glass substrate and a package cover. The organic light-emitting unit includes various layers such as an anode, an organic light-emitting layer, and a cathode. The anode and the cathode are led out by lead wires in the non-light-emitting area, and are bonded to the integrated circuit (IC) or flexible circuit board (FPC). [0003] Dust particles, burrs, pinholes, cracks and other defects inevitably exist in the manufacturing process of OLED screens, and the distance between the anode and cathode of OLED screens is usually very small (about tens to hundreds of nanometers). As ...

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Problems solved by technology

Therefore, it has the following characteristics: one is: single point, the fuse works at the short-circuit point, and the fuse fusing changes from short circuit to open circuit; The fuse is blown, so this kind of circuit structure cannot be completely repaired by itself, that is, it cannot guarantee that the fuse can be blown every time, which needs to be improved urgently

[0005] Another example is the "connector-type short-circuit prevention structure" in the prior art. This short-circuit protection structure is to connect a high-resistance connector in series in the sub-light-emitting area of ​​the OLED panel, and the purpose is to reduce the short-circuit current when the pixel point is short-circuited. The short-circuit current does not exceed 10% of the total current, which is completely opposite to the "fuse type anti-short circuit structure". This kind of circuit protection structure will reduce the short-circuit current once a short-circuit fault occurs. The short-circuit current does not exceed 10% of the total current. It has the following Features: One is: single-point, the connector at the short-circuit point works, and the connector will reduce the short-circuit current; the other is: passive, only when the pixel point is short-circuited, it will work, so this circuit structure cannot repair the pixel by itself Short circuit, needs to be improved urgently

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