Driving method and driver for active luminous display panel

A technology of light-emitting display and driving method, which is applied in the direction of lighting devices, electroluminescent light sources, light sources, etc., and can solve the problems of poor linearity of gray scale control, decreased luminous efficiency, and reduced lighting time rate of EL elements, etc.
CN1499471AInactive Publication Date: 2004-05-26TOHOKU PIONEER CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TOHOKU PIONEER CORP
Publication Date
2004-05-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

In a drive device for an active type light emitting display panel which can apply a reverse bias voltage to an EL element, in order to be able to compensate deterioration in light-emitting efficiency of the EL element accompanied by applying of the reverse bias voltage and the like, one pixel 10 is composed of a controlling TFT (Tr1), the driving TFT (Tr2 ) , a capacitor C1, and the EL element E1. Switching switches SW1, SW2 mutually enables a supplying state of a forward current to the EL element E1 and an applying state of the reverse bias voltage to be selected . In one control form according to the present invention, when the applying state of the reverse bias voltage shifts to the supplying state of the forward current, by switching one switch first, the anode and cathode of the EL element E1 are made to the same electrical potential to allow electrical charges to be discharged. Thus, charge of the forward current for a parasitic capacitance of the EL element E1 can be performed rapidly, and rising of the lighting operation of the EL element can be advanced.
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Description

technical field

[0001] The present invention relates to a driving device for a light-emitting display panel that can apply a reverse bias voltage to the above-mentioned light-emitting element while actively driving the light-emitting element constituting a pixel with a TFT (Thin Film Transistor), especially capable of compensating the luminous efficiency of the above-mentioned light-emitting element A driving method and a driving device of an active light-emitting display panel that decreases with the application of a reverse bias voltage. Background technique

[0002] The development of a display using a display panel configured by arranging light-emitting elements in a matrix is ​​progressing widely. As a light-emitting element used in such a display panel, an organic EL (electroluminescence) element in which an organic material is used for a light-emitting layer is attracting attention. This is because, as a background, progress has been made in improving efficiency and ...

Claims

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