Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2003-10-24
2004-10-12
Vu, David (Department: 2821)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000
Reexamination Certificate
active
06803718
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a flat panel display device and, more particularly, to an organic electroluminescent (OEL) display device suitable for displaying various kinds of information and images.
2. Description of Related Art
Organic electroluminescent display devices become focus among various flat panel display devices in recent years because of their advantage of spontaneous emission. In other words, the pixels on the organic electroluminescent display device are capable to display colored images without external backlight modules. Therefore, an organic electroluminescent display device can be a suitable flat panel display device for future applications owing to the advantages of lightweight, compact-size, and thin-thickness.
Generally speaking, the panel of the organic electroluminescent display device is divided into two areas—i.e. an active area and a lead-out area for conducting lines. In most cases, the electrical current is transmitted through the conducting lines to the electrode lines in the active areas. In most current OLED panel, each conducting line is composed of a transparent electrical conducting layer and fine auxiliary metal (e.g., chromium) lines mounted in the layer of transparent electrical conducting layer for increasing the current density therein and simplifying the manufacturing process of the display panel. However, the stacked structure of the conducting lines are easily deteriorated or peeled off due to the damages caused by environmental moisture, oxygen or the frequent driving of electrical currents. As a result, some problems, such as burnout or short circuit occurs frequently in the conducting lines which connect the electrodes in the active area of the conventional electroluminescent display device and the external parts (e.g. ICs). The problems caused from the damages made by moistures, and other electrical factors often lead to unusual deterioration of display qualities. For example, an abnormal bright line (or bands) or an abnormal dark line (or bands) occasionally shows up on the OLED display panel. Moreover, the lifetime of the electroluminescent display device is shortened. Owing to the deterioration of the display quality, the yield for manufacturing OLED is also decreased.
Therefore, it is desirable to provide an organic electroluminescent display device and method for packaging the same to mitigate the aforementioned problems.
SUMMARY OF THE INVENTION
The present invention is to provide an organic electroluminescent display device to reduce or prevent the damage to the conducting lines caused by the environmental moisture and oxygen, to avoid the burnout or short circuit happening to the conducting lines, to improve the display quality, to extend the lifetime of the OLED, to improve the manufacturing yield of display panel, and to reduce the cost of the wasted panels.
The present invention is also to provide a method for packaging an organic electroluminescent display device to reduce or prevent the damage to the conducting lines caused by the environmental moisture and oxygen, to avoid the burnout or short circuit happening to the conducting lines, to improve the display quality, to extend the lifetime of the OLED, to improve the manufacturing yield of display panel, and to reduce the cost of the wasted panels.
In accordance with the present invention, the organic electroluminescent display device of the present invention comprises: a substrate having a first conducting area, a second conducting area, and an active area; wherein said active area locates adjacent to said first conducting area and said second conducting area; a plurality of connecting wires, which do not connect with each other and are located outside said active area on said substrate; a plurality of stripes of first electrodes located in said active area, wherein said first electrodes connect to said connecting wires; a plurality of first conducting lines, which do not connect with each other and are located in said first conducting area on said substrate; a plurality of second conducting lines, which do not connect with each other and are located in said second conducting area on said substrate; a plurality of second electrodes located in said active area, wherein each of said second electrodes connects a first conducting line or a second conducting line; at least one organic electroluminescent medium located in said active area, wherein said organic electroluminescent medium is sandwiched between said first electrode and said second electrode; an upper cover mounted over or on said active area of said substrate for covering said active area; a sealing layer sandwiched between said upper cover and said substrate for sealing, surrounding said active area, and isolating said active area from air or moisture; and an insulating layer filled over said first conducting lines, said second conducting lines, and said connecting wires for isolating said first conducting lines, said second conducting lines, and said connecting wires from air or water; wherein part of each first electrodes, each first conducting lines, each second conducting lines, and each connecting wires has at least one auxiliary metal layer and one transparent electrical conducting layer, and said transparent electrical conducting layer is sandwiched between said auxiliary metal layer and said substrate.
The panel for an organic electroluminescent display device of the present invention includes: a substrate having a first conducting area, a second conducting area, and an active area; wherein said active area locates adjacent to said first conducting area and said second conducting area; a plurality of connecting wires located outside said active area on said substrate, wherein said connecting wires do not connect with each other; a plurality of stripes of first electrodes located in said active area, wherein said first electrodes connect to said connecting wires; a plurality of first conducting lines located in said first conducting area on said substrate and do not connect with each other; and a plurality of second conducting lines located in said second conducting area on said substrate and do not connect with each other; wherein each first conducting line, each second conducting line, and each connecting wire in said active area has at least one transparent electrical conducting layer and optionally an auxiliary metal layer, said transparent electrical conducting layer is sandwiched between said auxiliary metal layer and said substrate; and no auxiliary metal layer exists in each first conducting lines, each second conducting lines, and each connecting wires outside said active area.
The organic electroluminescent display device of the present invention includes: a substrate having a first conducting area, a second conducting area, and an active area; wherein said active area locates adjacent to said first conducting area and said second conducting area; a plurality of connecting wires located outside said active area on said substrate, wherein said connecting wires do not connect with each other; a plurality of stripes of first electrodes located in said active area, wherein said first electrodes connect to said connecting wires; a plurality of first conducting lines located in said first conducting area on said substrate and do not connect with each other; a plurality of second conducting lines located in said second conducting area on said substrate and do not connect with each other; an upper cover mounted over or on said active area of said substrate for covering said active area; and a sealing layer sandwiched between said upper cover and said substrate for sealing, surrounding said active area, and isolating said active area from air or moisture; wherein each first conducting line, each second conducting line, and each connecting wire in said active area has at least one transparent electrical conducting layer and optionally an auxiliary metal layer, said transparent electrical conducting layer is sandwiched between said auxiliary m
Lee Jiun-Haw
Liao Meng-Chieh
Wu Chao-Chin
RiTdisplay Corporation
Vu David
LandOfFree
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