Current driving circuit and display

Abstract

A current drive circuit is provided with a bias generator and a current output unit; wherein the bias generator is provided with: p-channel MOS transistor, p-channel MOS transistor, and reference current source; and the current output unit is provided with: p-channel MOS transistor, switch means, p-channel MOS transistor, and output terminal.

Description

technical field [0001] The present invention relates to a current driving circuit and a display, more particularly, to a current driving circuit and a display of an organic EL element. Background technique [0002] Since the luminance of emitted light in an organic EL element is determined by a drive circuit, in a display in which a plurality of organic EL elements are arranged in a matrix, a current driver can better eliminate variations in emitted light luminance than a voltage driver . Generally, a current is driven from a structure as shown in FIG. 1 as a current of an organic EL element. FIG. 1 is a circuit diagram of a current driving circuit in the prior art. As shown in Figure 1, the current drive circuit in the prior art is provided with: p-channel MOS transistor M01, p-channel MOS transistor M11, reference current source I1, switching device SW1 and output terminal O1; organic EL element Z1 and output terminal O1 connection, as a load. In addition, the p-channe...

AI Technical Summary

Problems solved by technology

As another problem, the use of a basic current mirror circuit in the current drive current of the prior art example shown in Fig. 1 hinders the acquisition of high precision return current

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