Organic electroluminescent diode service life tester

Abstract

The invention discloses an organic electroluminescent diode service life tester, which comprises a microprocessor, a display and prompt circuit, a parameter setting circuit, a data storage circuit, a time-base circuit, a temperature measuring circuit, a communication interface circuit, a numerically controlled voltage output circuit, a numerically controlled constant current source circuit and a measuring circuit. The numerically controlled voltage output circuit provides voltages for a diode to be tested, and the numerically controlled constant current source circuit provides constant current for the diode to be tested; and the measuring circuit is connected with the diode to be tested so as to measure the voltage and luminous intensity of the diode to be tested. The tester provides adjustable voltage, outputs constant current under set voltage, sets a voltage value and a constant current value through an external keyboard, performs measurement and adjustment through the measuring circuit, provides the stable test voltage and current and improves the test accuracy. Besides, the tester can measure the environmental temperature of a sample to be tested, so the tester can correct a brightness test result by utilizing the temperature under the condition of high accuracy requirement.

Description

technical field [0001] The invention belongs to the field of detection of organic electroluminescent diodes, and relates to a detector, in particular to a detector for life detection of organic electroluminescent diodes. Background technique [0002] OLED display device is a light-emitting device with fast response speed and no viewing angle, but it is also an organic substance, which has problems such as aging and service life. Therefore, service life has become a key factor restricting OLED. In the development process of OLED display devices, the measurement of its lifetime is an important index to characterize the performance of the device. At present, there are few types of instruments used to measure the lifetime of OLEDs, and the operation in laboratories and factories is also very inconvenient. There is no device with relatively complete functions for automatic testing of the lifetime of organic electroluminescent devices. There are few kinds of OLED lifetime measuri...

AI Technical Summary

Problems solved by technology

At present, there are few types of instruments used for OLED life measurement, and the operation in laboratories and factories is also very inconvenient. There is no device with relatively complete functions for automatic testing of the life of organic electroluminescent devices.

There are few types of OLED life measuring instruments in the prior art, which can provide measurement voltage to the device under test, or can only provide a fixed constant current output

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