Driving device, display apparatus using the same, and driving method therefor

Abstract

A driving device which supplies a current to a plurality of current driven optical elements (Ep) to drive the optical elements includes at least a driving current supply circuit (133) which supplies a driving current to each optical element for a predetermined period, and a control voltage applying circuit (132) which applies a charge voltage having a voltage value corresponding to a voltage to be applied to each optical element using the driving current, before the driving current is supplied. The driving current supply circuit (133) includes a single constant current generating circuit (10A, 10B, 10C) which outputs a constant current having the same current value as that of a driving current, and a plurality of current storage circuits (30A, 30B, 30C) which sequentially receive and hold the constant current and output the driving current on the basis of the constant current.

Description

technical field [0001] The present invention relates to a driving device, a display device using the driving device and a driving method for the display device, in particular to a driving device for driving an optical element with a driving current, and using the driving device for driving a A display device for driving a simple matrix type display panel of a display element formed of optical elements and a driving method for the display device. Background technique [0002] In recent years, it has been noted that display devices and devices such as liquid crystal displays (LCDs) have been rapidly developed as monitors and displays for personal computers and video equipment instead of cathode ray tubes (CRTs). In particular, liquid crystal displays have rapidly come into widespread use because they can achieve thinness and light weight, space saving, reduced power consumption, etc., compared with conventional display devices (CRTs). In addition, relatively small liquid crys...

AI Technical Summary

Problems solved by technology

As shown in FIGS. 15A and 15B, the rising characteristics of the current value and voltage value supplied to the display element are degraded due to the junction capacitance of the display element and the interconnection capacitance of the signal line.

In addition, the degree of degradation changes due to changes in junction capacitance between individual display elements, differences in interconnection capacitance between signal lines, etc.

As a result, the amount of charge delivered to the display elements during the drive current supply period falls below the amount required for display at the desired brightness level, which results in insufficient emission luminance or variations in emission luminance between display elements

This causes degradation of the display state

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