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Image display

An image display device and unit pixel technology, applied in lighting devices, electrical components, circuits, etc., can solve the problems of increased manufacturing procedures and cost increases, and achieve the effect of simple manufacturing process

Inactive Publication Date: 2005-12-28
KYOCERA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the conventional image display device 1, although there is a so-called 1 ~4 3 The advantage of increasing the luminance per unit pixel and reducing the current value per unit pixel by lamination, but with the increase of the number of laminations, there are disadvantages of so-called increase in the manufacturing process and increase in cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a plan view showing the configuration of the image display device 10 according to Embodiment 1 of the present invention. figure 2 From figure 1 A cross-sectional view viewed along line A1-A1 is shown. image 3 From figure 1 A cross-sectional view viewed along the line B1-B1 is shown.

[0025] figure 1 The image display device 10 shown has a plurality of pixel areas 11 arranged in a matrix 1 ~11 n , ... are display devices that emit light using the aforementioned organic EL elements. These pixel areas 11 1 ~11 n , ... each correspond to one pixel, are adjacently formed in the same layer, and are electrically connected in series. The image display device 10 is manufactured by known vapor deposition or printing techniques.

[0026] Specifically, the pixel area 11 1 There are two light emitting regions of the first light emitting region 12 and the second light emitting region 13 . The light emitting areas of the first light emitting region 12...

Embodiment 2

[0037] In the aforementioned embodiment 1, for the through-hole (through-hole 14: refer to figure 2 ) to connect the cathode (cathode metal layer 27) of the first light-emitting region 12 and the anode (anode metal layer 21) of the second light-emitting region 13 have been described, but instead of the through hole, the through hole may be replaced A configuration example in which the anode and the cathode are connected by a flat pad. Hereinafter, this configuration example will be described as Embodiment 2. FIG. Figure 4 It is a plan view showing the configuration of an image display device 40 according to Embodiment 2 of the present invention. Figure 5 From Figure 4 A cross-sectional view of line A2-A2 is shown.

[0038] Figure 4 The image display device 40 shown has a plurality of pixel areas 41 arranged in a matrix 1 ~41 n , ... are display devices that emit light using the aforementioned organic EL elements. These pixel areas 41 1 ~41 n , ... each correspond...

Embodiment 3

[0049] In the foregoing embodiments 1 and 2, the application examples for specific circuits are not mentioned, but they can also be applied to Figure 6 ~ Figure 8 circuit shown. Hereinafter, this application example will be described as Embodiment 3. FIG. Figure 6 The circuit shown corresponds to one pixel in the image display device, and is connected to the scanning line S 60 and data line D 60 The thin film transistor 60, the thin film transistor 61, the first organic EL element 62, and the second organic EL element 63 are constituted. This circuit is a drain-grounded type circuit.

[0050] The first organic EL element 62 and the second organic EL element 63 are connected in series, and figure 1 The illustrated organic EL elements in the first light emitting region 12 correspond to the organic EL elements in the second light emitting region 13 . Alternatively, the first organic EL element 62 and the second organic EL element 63 are connected in series, and Figure 4...

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PUM

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Abstract

The present invention provides an image display device capable of reducing the current value per unit pixel at low cost. The image display device includes: an organic EL element that emits light by current injection; and a thin film transistor that controls the value of the current flowing through the organic EL element to control the brightness of the organic EL element; Among them, the organic EL element has a plurality of light emitting layers divided into a first light emitting region (12) and a second light emitting region (13), and the first light emitting region (12) and the second light emitting region (13) are electrically connected in series.

Description

technical field [0001] The present invention relates to an image display device using, for example, an organic EL (Electronic Luminescent) element, and particularly relates to an image display device capable of reducing the current value per unit pixel at low cost. Background technique [0002] Conventionally, an image display device using an organic EL element having a function of emitting light by recombination of holes injected into a light emitting layer and electron emission has been proposed. [0003] This image display device includes: for example, a plurality of pixel circuits arranged in a matrix; a signal line driver circuit that supplies a luminance signal described later to the plurality of pixel circuits through a plurality of signal lines; Scanning lines are used to supply a scanning signal for selecting a pixel circuit for supplying a luminance signal to the pixel circuit. [0004] Figure 9 It is a side view showing the configuration of a conventional image ...

Claims

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Application Information

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IPC IPC(8): H01L27/32H05B33/14
CPCH10K59/86H10K59/122H10K59/12
Inventor 辻村隆俊田中淳小野晋也
Owner KYOCERA CORP