Boe Technology Group Co., Ltd.

Pilseok Kim

Ying Wang

Na Li

Taegyu Kim

Joohyeon Lee

The present invention belongs to the technical field of transparent conductive films and provides a graphene derivative, a transparent conductive film and an organic electroluminescent (EL) device. Methods are also provided for preparation of the graphene derivative and for preparation of an anode of the organic EL device. The graphene derivative exhibits a lower evaporation temperature and a higher work function. The graphene derivative is represented by formula (I): wherein A represents a graphene substrate, n represents the number of the group connected to adjacent two carbon atoms of a carbon ring of the graphene substrate; each X independently represents an electron-withdrawing group; and each R independently represents any one of &#x2014;R, &#x2014;R, &#x2014;O&#x2014;R, &#x2014;O&#x2014;R, &#x2014;R&#x2014;CH, &#x2014;R&#x2014;CH, and &#x2014;R, wherein each Ris independently an n-alkyl group having no less than 5 carbon atoms, each Ris independently a substituted n-alkyl group having no less than 5 carbon atoms in its main chain and having an alkyl substituent, the CHrepresents a phenyl group which is connected to the end of Ror R, and Ris an aryl group.

Graphene derivatives, transparent conductive films, organic electroluminescent devices, methods of preparing the graphene derivatives and methods of preparing anode layers of the devices

A gate on array driver unit, a gate on array driver circuit, and a display device. The gate on array driver unit comprises an input sampling unit, an output unit, a reset unit, and a storage capacitor. The storage capacitor is connected at a first end thereof to a gate electrode driving signal output end of the present stage. The input sampling unit is connected to a second end of the storage capacitor, and, under the control of a gate electrode driving signal of a previous stage of the gate on array driver unit, precharges the storage capacitor and allows the gate driving signal of the present stage to sample the input signal. The output unit is connected to the second end of the storage capacitor, and, when the input sampling unit completes the precharging of the storage capacitor, controls the output of the gate electrode driving signal of the present stage. The reset unit, under the control of the gate electrode driving signal of the gate on array driver unit of a next stage, resets the gate electrode driving signal of the present stage. Employment of the gate on array driver unit allows for reduced circuit layout area for the gate on array driver circuit.

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Beijing, China

Pilseok Kim