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Light-emitting device, display device and drive control method for light-emitting device

一种发光装置、显示装置的技术，应用在静态指示器、仪器等方向，能够解决不能电压测定、很难检测出有机EL元件特性变化等问题

Inactive Publication Date: 2009-10-07
SOLAS OLED LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned display device, the voltage across the two ends of the organic EL element cannot be measured, and it is difficult to detect the characteristic change of the organic EL element.
Therefore, it is not possible to perform drive control according to the characteristic change of the organic EL element

Method used

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  • Light-emitting device, display device and drive control method for light-emitting device
  • Light-emitting device, display device and drive control method for light-emitting device
  • Light-emitting device, display device and drive control method for light-emitting device

Examples

Experimental program
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no. 1 Embodiment approach

[0133] The structure of the display device of the first embodiment is as follows figure 1 shown.

[0134] The display device according to the first embodiment includes: a plurality of pixels 11_ij (i=1 to m, j=1 to n, m, n is a natural number); a light emitting region (light emitting region) 10 in which the plurality of pixels 11_ij are arranged; an anode circuit ( power line driving section) 12; a data driver (data driving section) 13; a selection driver (selection driving section) 14; and a control section 15.

[0135] Each pixel 11_ij corresponds to one pixel of an image, and is arranged in a matrix in the row and column directions in the light emitting region 10 . Each pixel 11_ij has: an organic EL element 111 as a light emitting element; transistors T1 to T3; and a pixel drive circuit composed of a capacitor (voltage holding unit) C1.

[0136] The organic EL element (Organic Electroluminescent Element: organic electroluminescent element) 111 is a light emitting element...

no. 2 Embodiment approach

[0244] The display device according to the second embodiment is a device that measures the voltage of each organic EL element for each row.

[0245] In image display, when the frequency of displaying horizontal lines is high, the value of the current flowing is different for each line. Therefore, the value of the voltage VEL is also different for each row. In order to accurately measure the voltage VEL in this case, the display device according to the second embodiment measures the voltage VEL for each row.

[0246] The display device of the second embodiment has the same features as those of the first embodiment, such as figure 1 structure shown.

[0247] Next, the operation of the display device according to the second embodiment will be described.

[0248] In the measurement operation of the voltage VEL, the control unit 15 measures the voltage VEL of the organic EL element 111 of each pixel 11_ij of each row. Such as Figure 9 As shown, the control unit 15 controls th...

no. 3 Embodiment approach

[0272] The display device according to the third embodiment is a device for measuring the voltage of the organic EL element of each pixel on a pixel-by-pixel basis.

[0273] For example, when a display (indicator) of a digital camera is used to display for a long time, if a part of the organic EL elements 111 deteriorate, the voltage VEL varies for each pixel. In order to accurately measure the voltage VEL of each organic EL element 111 in such a case, the display device according to the third embodiment measures the voltage VEL for each pixel.

[0274] The structure of the display device of the third embodiment is as follows Figure 10 shown.

[0275] The display device of the third embodiment includes a second selection driver 16 (second selection driver) in addition to the first selection driver 14 (first selection driver) having the same configuration as that of the first embodiment. Here, under the control of the control unit 15, the first selection driver 14 controls t...

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Abstract

The present invention provides a light-emitting device, capable of detecting a characteristic variation of a light-emitting element and being driven controlled taking regard of the characteristic variation of the light-emitting element. The light-emitting device is provided with a power supply line; at least a data line; at least a pixel having a light-emitting element and a first transistor, wherein one end of the light-emitting element is connected with the power supply line, the other end is provided with a prescribed electric potential, the first transistor is connected to the data line and one end of the light-emitting element; a power supply circuit, outputting a detection current of a presetting current value; and a data drive part, having a voltage measuring circuit which obtains the voltage of the end of the light-emitting element as the detection voltage by the data line and a current path of the first transistor of the pixel when the detection current from the voltage measuring circuit flows from one end to the other end of the light-emitting element through the power supply line.

Description

technical field [0001] The present invention relates to a light-emitting device, a display device, and a driving control method of the light-emitting device, and more particularly, to a light-emitting device provided with a light-emitting element on a pixel, a display device provided with the light-emitting device, and a driving control method of the light-emitting device. Background technique [0002] Conventionally, there are light-emitting elements such as organic EL (Electroluminescent: electroluminescence), inorganic EL, or LED (light emitting diode: light emitting diode) as optical elements of pixels, and it is known that each pixel is arranged in one column or in a matrix (row and column) And a light-emitting device in which a light-emitting element of each pixel emits light, or a light-emitting-element type display (display device) in which a display is performed using the pixel. [0003] In particular, light-emitting element displays of an active matrix drive method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/325G09G3/3266G09G3/3283G09G2300/0842G09G2300/0866G09G2320/0295G09G2320/043G09G2320/045G09G2330/021G09G3/30G09G3/20
Inventor 水谷康司森本和纪尾崎刚
Owner SOLAS OLED LTD
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