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Panchromatic organic electroluminescent display screen and its making method and driving circuit

A display, organic technology, applied in the field of full-color flat display, can solve the problems of reducing the aperture ratio, raising the driving voltage, increasing the impedance, etc., to achieve the effect of enhancing the luminous efficiency

Inactive Publication Date: 2004-09-29
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0037] When arranging pixels according to a straight line method or a Δ shape, the sizes of RGB light-emitting pixels are set almost the same, so that R pixels that are poor in brightness and luminous efficiency are not properly represented, thus deteriorating texture
[0038] Also, the opening ratio is lowered, and the ITO lines for connecting the light-emitting pixels become thinner and longer to cause an increase in impedance, so that the uniformity on the screen is lowered, and the driving voltage is raised.

Method used

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  • Panchromatic organic electroluminescent display screen and its making method and driving circuit
  • Panchromatic organic electroluminescent display screen and its making method and driving circuit
  • Panchromatic organic electroluminescent display screen and its making method and driving circuit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0089] Figure 3A to Figure 3K is a plan view showing the process of manufacturing the full-color EL display device according to the first embodiment of the present invention.

[0090] like Figure 3A As shown, an anode line pattern 102-2 is formed on glass 101 by using ITO or other transparent electrodes. Here, the light-emitting pixel 102-1 is formed in a polygonal shape having at least three corners, and its area emitting red light is larger than that of blue and green light. Half of the area of ​​the light-emitting pixel 102-1 is arranged for red, and the remaining area is arranged for blue and green. Another anode line pattern is also formed under the light emitting pixel 102-1.

[0091] Then, if Figure 3B As shown, the auxiliary electrode 105 is formed in the anode line 102-2 connected to the light-emitting pixel 102-1 in order to reduce the impedance of the anode line 102-2. When the auxiliary electrode 104 is also provided around the light-emitting pixel 102-1, it...

no. 2 example

[0106] Figure 8A to Figure 8L is a plan view showing the process of manufacturing the full-color organic EL display device according to the second embodiment of the present invention.

[0107] First, if Figure 8A As shown, patterns of anode lines 202-1 and 202-2 are formed on glass 201 using ITO or other transparent electrodes. The anode lines 202-1 and 202-2 are patterned into the above-mentioned shape, so that each unit of the light-emitting pixel 202-3 is divided into four sub-pixels 202-4 along the diagonal direction, and the shape of each sub-pixel is rounded. corner triangle. A unit light-emitting pixel 202-3 composed of sub-pixels 202-4 is provided with a light-emitting material layer for emitting red, green and blue light.

[0108] In the sub-pixel 202-4 of the above structure, a pair of sub-pixels facing each other in the diagonal direction are applied with a red light-emitting material layer, which will emit weak red light with relatively low luminous efficiency...

no. 3 example

[0123] Figure 10 A driving circuit of an organic EL device having an array structure according to a third embodiment of the present invention is shown.

[0124] see Figure 10 , the driving circuit includes: an anode circuit 301, which is used to apply a specific driving voltage to each light-emitting RGB pixel; a cathode circuit 302, which is used to output a scanning signal to a cathode line, and the two ends of the cathode line are connected in a circuit and a display unit 303 for displaying with data signals and scan signals by adjusting the area ratio of each RGB light-emitting pixel and the width of the anode line according to the characteristics of the driving voltage applied to each light-emitting RGB pixel.

[0125] Below, the Figure 10 The current-driven organic EL device of the present invention is shown for comparison with the prior art EL device shown in FIG. 1 .

[0126] If, as in the prior art circuit in FIG. 1 , a drive voltage of a different value is outp...

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Abstract

Disclosed is a full color flat display panel by using an organic electro-luminescent(EL) device, a manufacturing method thereof and a driving circuit of the organic EL device, in particular, which includes first, second and third pixels, a plurality of first electrodes, and a plurality of second electrodes perpendicularly intersecting the first electrodes, in which each of the first, second and third light emitting pixels is arranged in each of intersecting positions of the first and second electrodes. Light emitting pixels are arranged to have different areas according to luminous efficiency so that a red light emitting area with relatively poorer efficiency is sized larger than a blue or green light emitting area thereby manufacturing an efficient full color organic EL display panel.

Description

technical field [0001] The invention relates to a full-color flat display screen using an organic electroluminescence (EL) device, a manufacturing method thereof and a driving circuit of the organic EL device. Background technique [0002] Recently, the flat panel display industry has been rapidly developed. In particular, since organic EL arrays can generate a relatively large amount of light and displays employing organic EL arrays can be used under various environmental conditions, organic EL arrays are gradually attracting attention as image sources in direct displays or virtual displays. [0003] In other words, an organic EL array can emit a sufficient amount of light to be used as a display under various environmental conditions ranging from no or little light to a sufficient amount of light. [0004] Moreover, the manufacturing cost of the organic EL array is low, and it can be applied to a very small size below 1 inch to a very large size of tens of inches. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32
CPCH01L51/5203H01L51/5212H01L27/3211H01L27/3281H01L27/329G09G3/3216G09G2300/0426H10K59/352H10K59/353H10K59/17H10K59/1795H10K50/813H10K50/814
Inventor 金昌男金学洙金正倍金明燮
Owner LG ELECTRONICS INC