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Organic el display device

A display device, organic technology, applied in lighting devices, static indicators, instruments, etc., can solve problems such as brightness deviation

Active Publication Date: 2017-04-12
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in an organic EL display device that controls gradation levels based on video voltages corresponding to video data, the current value of the current flowing through the organic EL element fluctuates due to variations in the threshold voltage of the drive transistor or threshold fluctuations over time. The problem of brightness deviation

Method used

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  • Organic el display device
  • Organic el display device
  • Organic el display device

Examples

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Embodiment Construction

[0048] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0049] In addition, in all the drawings for explaining the embodiment, members having the same function are given the same reference numerals, and redundant description thereof will be omitted. In addition, although the embodiment shown below is an example of embodiment of this invention, this invention is not limited to these embodiment.

[0050] figure 1 It is a block diagram showing a schematic configuration of an organic EL display device according to one embodiment of the present invention.

[0051] figure 1 Among them, 1 is an organic EL display device. The organic EL display device 1 includes an organic EL drive circuit 10 and an organic EL display panel 20 . The organic EL display panel 20 has video lines (not shown) and scanning lines (not shown), and a scanning line drive circuit 21 is provided therein.

[0052] The organic EL drive circuit 10 i...

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PUM

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Abstract

The present invention provides an organic EL display device which increases the time for writing an image voltage in an organic EL display device to which an initial value voltage is applied compared with the prior art. The organic EL display device of the present invention is arranged in a plurality of pixels in a matrix; a plurality of image lines for supplying image voltage to each of the above-mentioned pixels; and a plurality of scanning lines for supplying a scanning voltage to each of the above-mentioned pixels, each of which has an organic EL The above-mentioned organic EL display device is characterized in that: when N is an integer greater than or equal to 2 (2≤N), and k is any positive integer, during the k-th scanning period, the above-mentioned N scanning lines are collectively supplied with a unit for selecting a scan voltage and supplying an initialization voltage to each of the image lines; and sequentially supplying a selection scan voltage to the N scan lines during each scan period from (k+1)th to (k+N)th, And means for supplying video voltage to each video line.

Description

technical field [0001] The present invention relates to an organic EL display device, and particularly relates to a technique effective for compensating the threshold voltage of a driving transistor of a pixel circuit. Background technique [0002] In recent years, demand for flat panel display (FPD: flat panel display) devices has increased. In particular, organic EL display devices using organic EL (Electro Luminescence) elements (OLED; Organic Light Emitting Diode; Organic Light Emitting Diode) are excellent in power consumption, lightness, thinness, dynamic image characteristics, and viewing angles. Development and practical use are also advancing. [0003] The organic EL display device includes a pixel circuit having a driving transistor. The driving transistor of the pixel circuit controls the driving current flowing through the organic EL element based on the video voltage corresponding to the video data input to the gate electrode, and controls the grayscale of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208H05B44/00
CPCG09G2300/0866G09G2320/045G09G3/3233G09G2320/0233G09G2310/0205G09G3/2085G09G3/3258G09G3/3266G09G2300/0439G09G2300/0809G09G2300/0861G09G2310/0243G09G2310/08G09G2330/028G09G2360/12
Inventor 武田伸宏
Owner JAPAN DISPLAY INC