Drive current regulator circuit, organic EL element drive circuit using the same drive current regulator circuit and organic EL display device using the same organic EL element drive circuit
First Claim
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1. A drive current regulator circuit of an organic EL element drive circuit, for regulating a drive current of one of terminal pins of an organic EL display panel, comprising:
- a switch circuit for selectively passing data stored in a memory; and
a current generator circuit provided for every one of said terminal pins, for generating a predetermined current on a basis of a drive current for driving said terminal pin or a basic current of the drive current and the ON/OFF operation of said switch circuit, said memory being a non-volatile memory written with said data or a volatile memory written with said data written in a non-volatile memory, said memory being adapted to regulate the drive current according to the predetermined current.
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Abstract
A drive current of every terminal pin is regulated according to data stored in a rewritable non-volatile memory by ON/OFF switching the data by a switch circuit. By writing data necessary for luminance regulation for correcting luminance variation or luminance unevenness in the non-volatile memory, luminance variation or luminance unevenness is reduced.
25 Citations
15 Claims
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1. A drive current regulator circuit of an organic EL element drive circuit, for regulating a drive current of one of terminal pins of an organic EL display panel, comprising:
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a switch circuit for selectively passing data stored in a memory; and
a current generator circuit provided for every one of said terminal pins, for generating a predetermined current on a basis of a drive current for driving said terminal pin or a basic current of the drive current and the ON/OFF operation of said switch circuit, said memory being a non-volatile memory written with said data or a volatile memory written with said data written in a non-volatile memory, said memory being adapted to regulate the drive current according to the predetermined current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An organic EL display device comprising:
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an organic EL display panel;
an output stage for current-driving a plurality of terminal pins of said organic EL display panel; and
a drive current regulator circuit of an organic EL element drive circuit for regulating a drive current for said terminal pin of said output stage, said drive current regulator circuit comprising a switch circuit for selectively passing data stored in a memory and a current generator circuit provided for every one of said terminal pin of said organic EL display panel, said current generator circuit being responsive to a current for driving said terminal pin or to a base current of the driving current to generate a predetermined current according to the driving current or the base current thereof and the ON/OFF switching of said switch circuit, said memory being a non-volatile memory written with said data or a volatile memory written with said data written in a non-volatile memory, said memory being adapted to regulate the drive current according to the predetermined current. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification