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US 2008/0074358 A1Published application
Electroluminescence display apparatus and method of correcting display variation for electroluminescence display apparatus
AssigneesSanyo Electric Co., Ltd., Sanyo Semiconductor Co., Ltd.
InventorTakashi Ogawa
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Abstract
By correcting a data signal based on a current flowing through an EL element when an element driving transistor which controls a drive current to be supplied to the EL element is operated in a saturation region and the EL element is set to an emission level, it is possible to realize a rapid display variation inspection and a high precision display variation correction. By providing a current measuring function on an EL display apparatus, a characteristic variation after the apparatus is shipped can be handled and corrected.
Claims10
A method of correcting a display variation for an electroluminescence display apparatus, wherein
- the display apparatus comprises, in each pixel, an electroluminescence element having a diode structure and an element driving transistor which is connected to the electroluminescence element and which controls a current flowing through the electroluminescence element;
- an inspection ON display signal which sets the electroluminescence element to an emission level is supplied to each pixel, the element driving transistor is operated in a saturation region of the transistor, and a current flowing through the electroluminescence element is detected, and
- a data signal to be supplied to a corresponding pixel is corrected based on a value of the current flowing through the electroluminescence element.
A method of correcting a display variation for an electroluminescence display apparatus, wherein
- the display apparatus comprises, in each pixel, an electroluminescence element having a diode structure and an element driving transistor which is connected to the electroluminescence element and which controls a current flowing through the electroluminescence element;
- the element driving transistor of each pixel is operated in a saturation region of the transistor and an inspection ON display signal which sets the electroluminescence element to an emission level and an inspection OFF display signal which sets the electroluminescence element to a non-emission level are supplied to each pixel;
- an ON-OFF current difference between a current flowing through the electroluminescence element corresponding to the inspection ON display signal and a current flowing through the electroluminescence element corresponding to the inspection OFF display signal is detected;
- the ON-OFF current difference is compared to a reference value and a characteristic variation of an operated pixel is detected;
- and
- a data signal to be supplied to a corresponding pixel is corrected based on the detected characteristic variation.
3 more elements
An electroluminescence display apparatus comprising:
- a display section having a plurality of pixels;
- a correction data storage section which stores correction data for correcting a display variation;
- and
- a correction section which corrects the display variation, wherein
- each of the plurality of pixels comprises an electroluminescence element and an element driving transistor which is connected to the electroluminescence element;
- the correction data storage section stores correction data corresponding to a current flowing through the electroluminescence element when an inspection ON display signal which sets the electroluminescence element to an emission level is supplied;
- and
- the correction section corrects a data signal to be supplied to each pixel based on the correction data.
5 more elements
An electroluminescence display apparatus comprising:
- a display section having a plurality of pixels;
- a correction data storage section which stores correction data for correcting a display variation;
- and
- a correction section which corrects the display variation, wherein
- each of the plurality of pixels comprises an electroluminescence element and an element driving transistor which is connected to the electroluminescence element;
- the correction data storage section stores correction data corresponding to an ON-OFF current difference between a current flowing through the electroluminescence element corresponding to an inspection OFF display signal which sets the electroluminescence element to a non-emission level and a current flowing through the electroluminescence element corresponding to an inspection ON display signal which sets the electroluminescence element to an emission level when the inspection OFF display signal and the inspection ON display signal are supplied;
- and
- the correction section corrects a data signal to be supplied to each pixel based on the correction data.
5 more elements
An electroluminescence display apparatus comprising:
- a display section having a plurality of pixels;
- a variation detecting section which detects a display variation in each pixel;
- and
- a correction section which corrects the display variation, wherein
- each of the plurality of pixels comprises an electroluminescence element and an element driving transistor which is connected to the electroluminescence element;
- the variation detecting section detects an ON-OFF current difference between a current flowing through the electroluminescence element corresponding to an inspection OFF display signal which sets the electroluminescence element to a non-emission level and a current flowing through the electroluminescence element corresponding to an inspection ON display signal which sets the electroluminescence element to an emission level when the inspection OFF display signal and the inspection ON display signal are supplied, and compares the detected ON-OFF current difference to a reference value;
- and
- the correction section corrects a data signal to be supplied to each pixel based on a result of the comparison.
5 more elements
Dependencies are inferred from the claim text.