Drive device and drive method of self light emitting display panel and electronic equipment

Abstract

The present invention provides a drive device of a self light emitting display panel which is equipped with a plurality of organic EL elements 14 arranged at intersection positions between a plurality of data lines and plurality of scan lines comprises a first gradation control means for time-dividing a frame period into a plurality of subframe periods and setting gradation of each pixel by the sum of lighting periods of one or plural subframe periods, a second gradation control means for treating mutually adjacent plural pixels as a group and performing dither processing on a per group basis, and a reverse bias voltage applying means 27 for applying a reverse bias voltage to the light emitting elements. A subframe period to be a non-lighting period is provided in the plural subframes so that during this period the reverse bias voltage is applied to all light emitting elements by the reverse bias voltage applying means.

Description

technical field [0001] The present invention relates to a drive device, a drive method, and an electronic device equipped with a self-luminous display panel that divides one frame period into a plurality of subframe periods and performs gradation expression by lighting and controlling each subframe period. 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, for example, an organic EL (electroluminescence) element using an organic material for a light-emitting layer is attracting attention. [0003] As a display panel using such organic EL elements, there is an active matrix type display panel in which active elements including, for example, TFTs (Thin Film Transistors) are added to EL elements arranged in a matrix. The active matrix display panel can realize low power consumption, and...

AI Technical Summary

Problems solved by technology

That is, as long as there is a change such that the lighting rate increases greatly, the amount of the voltage drop of the wiring resistance increases, and as a result, the driving voltage of the element decreases and the emission brightness decreases.

This phenomenon is highly likely to occur in the weighted subframe method in which the lighting rate tends to change rapidly. In this case, there is a problem that the gradation display is damaged and normal gradation expression cannot be performed (occurrence of abnormal gradation).

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