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Organic electroluminescent device and driving method thereof

A light-emitting device and device technology, applied in the direction of electroluminescent light source, electric light source, electrical components, etc., can solve the problems of not being able to emit light, increasing power consumption, etc.

Active Publication Date: 2009-07-15
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] As a result, the pixels E11 to E44 cannot emit light with desired brightness
[0018] If light is emitted at a low gray scale after emitting light at a high gray scale as described above, the pixels E11 to E44 cannot emit light at a desired luminance, and power consumption is increased to emit light at a desired luminance

Method used

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  • Organic electroluminescent device and driving method thereof
  • Organic electroluminescent device and driving method thereof
  • Organic electroluminescent device and driving method thereof

Examples

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Embodiment Construction

[0033] The present invention can be more clearly understood from the detailed description taken in conjunction with the accompanying drawings.

[0034] image 3 is a diagram schematically showing an organic electroluminescent device according to a first embodiment of the present invention. Figure 4 is a timing diagram illustrating scan signals and data currents supplied to pixels of an organic electroluminescent device according to an embodiment of the present invention.

[0035] exist image 3 Among them, the organic electroluminescent device according to the first embodiment of the present invention includes: a panel 200 , a scanning driving circuit 210 , a control circuit 220 , a data driving circuit 230 , a pre-charging circuit 240 and a first discharging circuit 250 .

[0036] The panel 200 includes a plurality of pixels E11 to E44 formed on emission regions where the data lines D1 to D4 and the scan lines S1 to S4 cross.

[0037] Each of the pixels E11 to E44 is form...

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Abstract

The invention relates to an organic electroluminescent device and a driving method thereof. The driving method of the organic electroluminescence device includes: detecting a gray scale of a data current according to display data input from the outside, generating a control signal for controlling a discharge level according to the detected gray scale; Discharging the data lines to the first and second discharge levels; and supplying a pre-charging current to the data lines during a pre-charging time following the discharging time based on the display data. The organic electroluminescent device and its driving method according to the present invention can emit pixels of desired brightness by making the discharge circuit adjust the discharge level according to the gray scale, independent of the gray scale.

Description

technical field [0001] The invention relates to an organic electroluminescent device and a driving method thereof. In particular, the present invention relates to an organic electroluminescent device capable of changing a discharge level according to a gray scale and a driving method thereof. Background technique [0002] An organic electroluminescent device is a device that emits light having a predetermined wavelength when a certain voltage is applied thereto. [0003] figure 1 is a diagram showing an organic electroluminescent device in the prior art. and, figure 2 is shown to provide figure 1 Timing diagram of pixel scan signal and data current. [0004] exist figure 1 Among them, the organic electroluminescent device in the prior art includes a panel 100 , a scanning driving circuit 110 , a control circuit 120 , a data driving circuit 130 , a pre-charging circuit 140 and a discharging circuit 150 . [0005] The panel 100 includes a plurality of pixels E11 to E44...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/30G09G3/20H05B33/08H05B33/14H05B44/00
CPCY02B20/343G09G3/2007G09G3/3216G09G3/3283G09G2340/16G09G2310/0248G09G2320/0252
Inventor 南荣熙李炫宰
Owner LG DISPLAY CO LTD