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Display apparatus

A technology for display devices and driving transistors, which is applied to static indicators, instruments, semiconductor devices, etc., can solve the problems of accelerated shift of threshold voltage and difficulty in suppressing the shift of threshold voltage of driving transistors, and achieve the goal of suppressing the shift of threshold voltage Effect

Inactive Publication Date: 2010-03-17
FUJIFILM CORP
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Problems solved by technology

Therefore, this method cannot compensate for the difference in the threshold voltage of the independent driving transistors and the difference in the shift amount of the threshold voltage of the driving transistors when displaying an image.
Then, once a threshold voltage shift occurs in the driving transistor due to insufficient reverse bias, the threshold voltage will shift at an accelerated rate
That is, it is difficult for the method described in Patent Document 4 to suppress the threshold voltage shift in the driving transistor when the display image is updated for a long time

Method used

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Embodiment Construction

[0042] Hereinafter, an organic EL display device incorporating a first embodiment of the display device of the present invention will be described with reference to the drawings. figure 1 is a schematic configuration diagram of an organic EL display device incorporating the first embodiment of the display device of the present invention.

[0043] like figure 1 As shown, the organic EL display device according to the first embodiment of the present invention includes an active matrix substrate 10, a data driving circuit 12, and a scanning driving circuit 13. The active matrix substrate 10 has a plurality of Pixel circuits 11, each for holding charges according to a data signal output from a data driving circuit 12, and applying a driving current through the organic EL element according to the amount of charges held therein, and the data driving circuit 12 supplies the active matrix substrate Each pixel circuit 11 of 10 outputs a data signal, and the scan driving circuit 13 o...

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Abstract

A display apparatus, prevented in threshold voltage shift in drive transistors and capable of stably correcting threshold voltage variations in the drive transistors over a long time, including an active matrix substrate with an array of multiple pixel circuits, each having a light emitting element, a drive transistor connected to the light emitting element to apply a drive current to the light emitting element, a capacitor element connected between a gate terminal and the source terminal of the drive transistor, and a selection transistor connected between the gate terminal of the drive transistor and a data line through which a predetermined data signal flows, in which the drive transistor is an n-type thin film transistor having a current characteristic in which a drive current at a gate-source voltage Vgs = 0V corresponds to an average drive current Idavr.

Description

technical field [0001] The present invention relates to a display device having light emitting elements driven by an active matrix method. Background technique [0002] Display devices using light emitting elements such as organic EL elements have been proposed for use in various applications including televisions, cell phone displays, and the like. [0003] Generally, as described in Japanese Unexamined Patent Publication No. 8(1996)-234683 (Patent Document 1), an organic EL element is a current-driven light-emitting element, and unlike a liquid crystal display, at least a selection transistor, a holding capacitor, and a driving The transistor, the selection transistor is used to select the pixel circuit, the holding capacitor is used to hold charges according to the image to be displayed, and the driving transistor is used as a driving circuit to drive the organic EL element. [0004] So far, low-temperature polysilicon or amorphous silicon thin film transistors have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H01L27/32
CPCG09G3/3233G09G2300/0819
Inventor 高桥俊朗濑户康宏
Owner FUJIFILM CORP
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