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Electroluminescent display panel and method for operating the same

An electroluminescent display and panel technology, which is applied in the direction of electroluminescent light source, electric light source, light source, etc., can solve problems such as hindering the manufacture of high-definition electroluminescent display panels, blurred images, etc.

Inactive Publication Date: 2009-07-01
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The pixel source line passing through the entire area of ​​the electroluminescent display panel has a resistive component, and there is a parasitic capacitance between the gate line and the source line, so that in the current frame after the previous frame is completed, if a weak sink current flows to the source line SL in order to provide the data voltage associated with the weak sink current, it takes a long time to store the data voltage in the capacitor 15
Therefore, if figure 2 As shown, image blur occurs in the current frame 2f after the completion of the previous frame, which hinders the manufacture of high-definition electroluminescent display panels

Method used

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  • Electroluminescent display panel and method for operating the same
  • Electroluminescent display panel and method for operating the same
  • Electroluminescent display panel and method for operating the same

Examples

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no. 1 example

[0034] image 3 The circuit of the electroluminescence display panel according to the first embodiment of the present invention is explained. Figure 4 and 5 Instructions include image 3 Block diagram of a unit pixel electroluminescent display panel.

[0035] refer to image 3 , a plurality of unit pixels are provided, and a unit pixel is defined at each intersection of a plurality of gate lines GL and a source line SL perpendicular to the gate lines. Only one unit cell is shown in the figure.

[0036] The unit cell of the electroluminescent display panel according to the first embodiment of the present invention includes: a first switching device 100 for switching a data signal in response to a signal supplied to the gate line GL; a capacitor 110 having a first terminal and a second terminal, The first terminal is connected to the output of the first switching device 100, the second terminal is connected to the power terminal Vdd, and is used to charge the data voltage ...

no. 2 example

[0049] Figure 7 A circuit according to a second embodiment of the present invention is described. Figure 8 explained Figure 7 operating time chart. Figure 9 Instructions include Figure 7 Block diagram of an electroluminescent display panel with a unit pixel.

[0050] The second embodiment of the present invention is characterized in that the enable signal E is activated by the preceding gate line GL(N-1) of the plurality of gate lines GL(N), the enable signal E being the activation signal of the light emission suppressing section 140 . That is, the light emission suppression driving part 220 is not required to control the light emission suppression part 140 , but the light emission suppression part 140 controls itself to initialize the capacitor 110 .

[0051] The light emission suppressing portion 140 in the second embodiment can be used in a related art electroluminescent display panel also having four TFTs, that is, the light emitting suppressing portion 140 is con...

no. 3 example

[0058] Figure 10 illustrates a circuit according to a third embodiment of the present invention, its timing diagram is compared with Figure 4 same.

[0059] refer to Figure 10 , the electroluminescent display panel according to the third embodiment of the present invention is consistent with the first embodiment except that the light emission suppressing part 140 is connected between the output terminal of the first switching device 100 and the output terminal of the second switching device 120 .

[0060] In the electroluminescent display panel, before the current frame is operated, that is, before the gate signal is activated, if the light emission suppression driving part (not shown) provides the enable signal E to the light emission suppression part 140, the light emission suppression part 140 is operated to make the storage The data voltage in the capacitor 110 in the previous frame is initialized to a value near the threshold voltage of the second switching device 12...

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PUM

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Abstract

The present invention discloses a method for operating an electroluminescent display panel which includes: a plurality of unit pixels; grid lines and source lines are intersectional; a first switch for responsing to the signals provided to the grid line to be converted into data signals; a capacitor for providing and exerting data voltage through the first switch; a second switch connected to the power supply voltage end, being converted by the voltage induced by the capacitor; an electroluminescent part illuminating by the power supply voltage provided by the second switch. The method includes: exerting data voltage on the source lines, dividing each frame into a normal interval and a black data interval, adding real data into the normal interval and adding black data into the black data interval; using grid lines having a plurality of unit pixels in the normal and black data intervals; and exerting black data voltage on the grid lines of the black data interval when using the grid lines and disconnecting the electroluminescent part at a certain interval when displaying images.

Description

[0001] This application claims the benefit of Korean Patent Application Nos. P2001-86065 filed on December 27, 2001 and P2001-87831 filed on December 29, 2001, which are hereby incorporated by reference in their entirety. technical field [0002] The present invention relates to an electroluminescent device. In particular, the present invention relates to an electroluminescent display panel and a method for operating the same, in which the operation of the electroluminescent device is controlled for the manufacture of high-definition degree display. Background technique [0003] Since electroluminescent devices have attracted attention as next-generation flat panel displays compared with passive devices that require receiving light to display images, electroluminescent devices have advantages of fast response speed, excellent brightness as active devices, ease of Manufactured with simple structure, light weight as well as thin and small size. [0004] Electroluminescent dev...

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
CPCY02B20/325Y02B20/30G09G3/30
Inventor 李汉相李明镐朴浚圭
Owner LG DISPLAY CO LTD