Organic light emission device display module

Details Organic light emission device display module Organic light emission device display module

2000-06-19

2001-12-25

Wong, Don (Department: 2821)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C315S169100, C315S169200, C315S169400, C313S496000, C313S505000

Reexamination Certificate

active

06333603

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of organic light emission devices, and especially to an organic light emission device display module having an organic light emission device panel and a driving circuit board connected to the organic light emission device panel by bonding wires.
2. Description of Related Art
An organic light emission device (hereinafter abbreviated as OLED) is an electronic element capable of converting electrical energy into light energy for output. The operating principle of the OLED is very similar to that of a light emitting diode (LED).
FIG. 14
shows a circuit diagram of an OLED panel formed by a plurality of OLEDs
901
. Each OLED
901
has two ends connected to an InTiO
3
(hereinafter abbreviated as ITO) electrode
902
and an aluminum electrode
903
, respectively. As such, by applying current to the electrodes
902
and
903
, the OLEDs
901
are controlled to emit light. Since illuminated light generated by the OLED
901
is approximately proportional to the working current thereof, the driving current applied to the OLED panel is generally very large. Therefore, the resistance of a connection between the OLED panel and a driving circuit must be relatively low to avoid the current loss and sustaining the uniform of illumination.
With reference to
FIG. 15
, in conventional skill, the connection between the OLED panel
900
and driving circuit is achieved by a tape carrier (TC) manner. That is, a soft aluminum foil board
905
is provided as a conductor tape for connecting the OLED panel
900
with a printed circuit board (hereinafter abbreviated as PCB) (not shown) having the driving circuit. By adhering the joint points at one end of the soft aluminum board
905
to the electrodes
902
and
903
of the OLED panel
900
, the OLED panel
900
is electrically connected to the driving circuit. Alternatively, a chip that includes the driving circuit may be adhered to the soft aluminum board
905
by welding in using the tap automatic bonding (TAB) technique. However, in the above conventional skill, the soft aluminum foil board
905
is too expensive and the cost for TAB package is relatively high. Furthermore, the package dimension can not be decreased due to the large aluminum foil board, which results in a difficulty in the miniaturization of OLED products. In addition, since the relatively long conductor tape is carried with a large driving current necessary by the OLEDs. It is likely to result in a current loss due to a large resistance of the conductor tape, and also cause an electromagnetic interference (hereinafter abbreviated as EMI) problem. Therefore, it is desired to have a novel OLED display module that can mitigate and/or obviate the aforementioned problems.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a low-cost and miniaturized OLED display module that does not cause the current loss and EMI problems.
To achieve the above object, the OLED display module in accordance with the present invention includes an OLED panel and a driving circuit board. The OLED panel has a plurality of electrodes extended to edges of the OLED panel for forming a plurality of first bonding pads, respectively. The driving circuit board has a driving circuit for driving the OLED panel, and a plurality of second bonding pads connected to the driving circuit. The plurality of second bonding pads of the driving circuit board are arranged with respect to the plurality of first bonding pads of the OLED panel, and each of the second bonding pads is connected to a respective first bonding pad by a bonding wire.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.


REFERENCES:
patent: 4459514 (1984-07-01), Morimoto et al.
patent: 5142388 (1992-08-01), Watanabe et al.
patent: 5793163 (1998-08-01), Okuda
patent: 5962970 (1999-10-01), Yokoi et al.

Affiliated with

Also associated with

Rating

Organic light emission device display module does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Organic light emission device display module, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic light emission device display module will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2583490