JP2003015539A - Drive device of organic el panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive device for an organic EL panel, in which the panel and driving elements are connected electrically, employing a smaller number of connecting processes and no large arranging space is required, after the completion of assembling. SOLUTION: The device is provided with a first flexible circuit substrate 2 which has an anode terminal group 12 for an organic EL panel, a land group 21 connected to the group 12, a land group 23 that transmits control signals to a drive element 22, a land group 24 that is used to connect a cathode terminal group 13 and the element 22, an input section 31 to input the control signals and a flexible second circuit substrate 3 which has a land group 32 that connects the control signals to the group 23, a land group 33 that is connected to the group 13, and a land group 34 that is connected to the group 24 to transmit output signals from the element 22 to the group 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for an organic EL panel having an organic EL (electroluminescence) element.

[0002]

2. Description of the Related Art Organic EL display panels are disclosed in, for example, Japanese Patent Laid-Open No.
As described in Japanese Patent Application Laid-Open No. 001-142432, a plurality of anode lines using transparent electrodes such as ITO (indium tin oxide) are formed in parallel on a translucent insulating support substrate such as a glass substrate, and the back surface of the anode lines is formed. Forming an organic layer on
A plurality of parallel cathode lines using a metal deposition film such as aluminum are formed on the back surface of the organic layer so as to be orthogonal to the anode line, and a pair of electrodes sandwiching the organic layer between the anode line and the cathode line is formed. There is a formed dot matrix type.

The organic EL panel constructed as described above is desired to have a larger size or a clearer display. Therefore, since the organic EL panel has a structure in which the number of the anode lines and the cathode lines is large, the anode terminal group and the cathode terminal group formed by being drawn out to electrically connect with these lines are organic. Generally, the EL panel is provided over two or more sides.

Further, in order to drive such an organic EL panel, a drive element for selecting any one of the anode line and the cathode line and applying a predetermined drive current is used.

The driving device for such an organic EL panel is composed of a flexible printed wiring or a connector for electrically connecting the driving element to the anode terminal group and the cathode terminal group of the organic EL panel. Wiring members are required.

[0006]

However, such a drive device for an organic EL panel has a large number of parts for electrically connecting the drive element to the anode terminal group and the cathode terminal group of the organic EL panel. Therefore, not only does the manufacturing process become complicated due to the increased number of connecting steps at the time of assembly, but many wiring members for connecting the both members are connected at the peripheral edge of the organic EL panel. The drive unit for the organic EL panel itself becomes large, and a large installation space must be secured in the storage case for storing the organic EL panel, and the display device including the drive unit for the organic EL panel is downsized. It has a problem that it can not be done.

The present invention has been made by paying attention to such a problem, and it is possible to electrically connect the organic EL panel and the driving element with a small number of connecting steps, and to provide a large installation space after assembling. It is an object of the present invention to provide a drive device for an organic EL panel that does not require the above.

[0008]

In order to solve the above-mentioned problems, the driving element of the organic EL panel of the present invention comprises, as described in claim 1, an organic layer exhibiting light emission on a translucent supporting substrate. An organic EL panel in which organic EL elements sandwiched by a pair of electrodes are arranged; an anode terminal group and a cathode terminal group of the organic EL elements formed in a row in at least two sides of the organic EL panel; A drive element that selectively supplies a drive current to the anode terminal group and the cathode terminal group,
A first land group connected to one terminal group of the anode terminal group and the cathode terminal group and arranged in a row, and a second land group arranged to transmit a control signal to the driving element. A land group, a third land group arranged in the same row as the second land group and connected to the other terminal group of the anode terminal group and the cathode terminal group, the drive element, the first and second land groups. Second,
A flexible first circuit board including a third land group;
An input section for inputting the control signal is provided, and a fourth land group arranged in a row for connecting the control signal to the second land group and a row for connecting to the other terminal group And a fifth land group arranged in a line, and connected to the third land group for transmitting the output signal from the driving element to the other terminal group and arranged in the same row as the fourth land group. A sixth land group to be provided, and the fourth, fifth, sixth
And a flexible second circuit board including the land group.

Further, as described in claim 2, claim 1
In the drive unit for the organic EL panel described in the paragraph 1,
The second circuit board and the second circuit board are
The land group and the fourth and sixth land groups are electrically connected to each other on the back surface side of the organic EL panel.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, the driving device of the organic EL panel is composed of an organic EL panel 1, a first circuit board 2 and a second circuit board 3.

The organic EL panel 1 includes a plurality of transparent anode lines made of a conductive material such as ITO and arranged in parallel.
An organic layer formed by sequentially stacking a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer by a method such as a vapor deposition method, and aluminum (Al), aluminum lithium (Al-Li), magnesium silver (Mg -Ag) or other metallic conductive material, and an organic EL element 11 composed of a plurality of cathode lines arranged in parallel with each other so as to be orthogonal to the anode line, and a rectangular translucent support. The organic EL element 11 is laminated on the substrate and is formed by a flat plate-shaped sealing member made of a glass material.
Is configured to cover. The anode line and the cathode line are formed to have a uniform thickness by a method such as a sputtering method or an evaporation method, and the anode line and the cathode line form a pair of electrodes sandwiching the organic layer.

In the organic EL panel 1, an anode terminal group 12 and a cathode terminal group 13 respectively corresponding to the anode line and the cathode line of the organic EL element 11 are formed on two sides of the organic EL panel in a row. ing.

The first circuit board 2 is a flexible board on which an element made of TCP (tape carrier package) is mounted. The first circuit board 2 is arranged in a row on one side of the first circuit board 2 corresponding to each terminal of the anode terminal group 12, and the anode terminal group 12 and the anisotropic conductive film are arranged. A first land group 21 that is electrically connected via a predetermined drive current in accordance with a control signal from a control circuit (not shown);
A driving element selectively applied to any one of the anode terminal group 12 and the cathode terminal group 13 (any one of the anode lines is selected and a voltage is applied, and one of the cathode lines is selected and grounded). Driver integrated circuit 22) for transmitting the control signal to the drive element 22 through the second circuit board 3 and arranged through a lead portion electrically connected to each terminal of the drive element 22. The first circuit board 2
The second land group 23 in a row formed on the side opposite to the side on which the first land group 21 is formed, and the driving element 22.
Through the lead-out portion electrically connected to each terminal of the
And a third land group 24 for electrically connecting to the cathode terminal group 13 of the organic EL panel 1 through the second circuit board 3 in the same row as the land group 23 of FIG. There is.

The second circuit board 3 is a flexible board made of FPC (flexible printed circuit board) and has a substantially L shape. The second circuit board 3 is provided with an input unit 31 having a shape connectable to an external device for inputting the control signal from the control circuit, and capable of transmitting the control signal from the input unit 31. And a fourth land group 32 arranged in a row at a position facing the input section 31 on the second circuit board 3 and a row corresponding to each terminal of the cathode terminal group 13. In addition, the cathode terminal group 1 is provided outside the right end from the formation position of the fourth land group 32.
5 and a fifth land group 33 electrically connected to the cathode terminal group 13 via the anisotropic conductive film, and an output signal (anode) from the drive element 22 to the cathode terminal group 13 via the fifth land group 33. In order to enable this, the fourth land group 32 and the sixth land group 34 arranged in the same row are provided. The second circuit board 3 also includes circuit elements 3 such as capacitors and resistance elements.
5 are provided.

First circuit board 2 and second circuit board 3
Is conductively connected to the organic EL panel 1 by an anisotropic conductive film, and is bent to the back surface side of the organic EL panel 1 as shown in FIG. 2 to provide a second land group 23 and a fourth land group. 32, and the third land group 24 and the sixth land group 34 are electrically connected via solder. Therefore, the control signal from the input unit 31 can be transmitted to the drive element 22, and the cathode from the drive element 22 can be connected to the organic EL.
The structure can be transmitted to the cathode terminal group 13 of the panel 1.

The control signal from the input section 31 is transmitted from the fourth land group 32 of the second circuit board 3 to the second land group 23 of the first circuit board 2 and then to the second land group 23. With the transmitted control signal, the driving element 22 selects a cathode line and an anode line to which a predetermined driving current should be applied, and the driving current of the selected cathode line is stored in the third land group 24. It is transmitted from any land to the land of the sixth land group 34 corresponding to the land, and the land of the fifth land group 33 (the sixth land group 2
The land corresponding to the land 4) is applied to the terminals of the cathode terminal group 13 of the organic EL panel 1. On the other hand, the drive current of the anode line selected by the drive element 22 is
Anode terminal group 12 from any one of the land groups 21 of
Is applied to the terminals of the anode terminal group 13 of the organic EL panel 1 corresponding to the lands.

The organic EL panel drive device includes an organic EL panel 1 and an organic EL panel 1 in which an organic EL element having a light-emitting organic layer sandwiched by a pair of electrodes is disposed on a translucent support substrate. An anode terminal group 12 of the organic EL element formed in a row on at least two sides of 1;
A drive element 22 for selectively applying a predetermined drive current to the anode terminal group 12 and the cathode terminal group 13, a first land group 21 connected to the anode terminal group 12 and arranged in a row, and a control signal A second land group 23 arranged in a row for transmitting to the driving element 22; a third land group 24 arranged in the same row as the second land group 23 for connecting to the cathode terminal group 13;
Drive element 22 and first, second and third land groups 21,2
A flexible first circuit board 2 provided with 3, 24, and an input section 31 for inputting the control signal are provided, and the control signal is arranged in a row for connecting to the second land group 23. In order to transmit the output signal from the fourth land group 32 provided, the fifth land group 33 arranged in a row connected to the cathode terminal group 13, and the drive element 22 to the cathode terminal group 13. A sixth land group 34 connected to the third land group 24 and arranged in the same row as the fourth land group 32;
Flexible second with sixth land group 32, 33, 34
The second and third circuit boards 3 are provided.
Land groups 23 and 24, and fourth and sixth land groups 3
Since 2 and 34 are respectively arranged in the same row, the two connection points can be solder-connected at one time, and the number of connection steps can be reduced.

Further, in the organic EL panel driving device, since the flexible first and second circuit boards 2 and 3 are bent and brought into close proximity to each other, the flexible circuit boards 2 and 3 are connected to each other. No wiring member such as a connector or a flexible printed wiring for electrically connecting the circuit boards to each other or a socket for connecting these is formed,
Connection can be easily made only by using solder or an anisotropic conductive film.

Further, in the organic EL panel driving device, the flexible first and second circuit boards 2 and 3 are bent,
By connecting and arranging on the back surface side of the organic EL panel 1, space saving is achieved as compared with a case where a circuit board is provided around the organic EL panel 1. In particular, since it is not necessary to provide a separate illumination such as a backlight on the back surface side of the organic EL panel 1 having the self-luminous organic EL element 11, it is possible to effectively use the space.

In the embodiment of the present invention, the one in which the first circuit board 2 and the second circuit board 3 are connected by solder has been described as an example, but the present invention is not limited to this. Instead, they may be connected by an anisotropic conductive film, for example.

Further, in the embodiment of the present invention, the driving device of the organic EL panel having the dot matrix type organic EL element 11 has been described, but the present invention is not limited to this and the organic EL element 11 is not limited thereto. It is effective if the anode terminal group 12 and the cathode terminal group 13 led out from the organic EL panel are formed on at least two sides. For example, driving of an organic EL panel having a segmented organic EL element divided into display sections. It may be a device.

[0023]

The present invention provides a drive device for an organic EL panel, which can electrically connect the organic EL panel and the drive element with a small number of connection steps and does not require a large installation space after assembly. can do.

[Brief description of drawings]

FIG. 1 is a plan view showing a driving device of an organic EL panel according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an organic E circuit connecting the first and second circuit boards of FIG.
The top view which shows the back surface side of L panel.

[Explanation of symbols]

1 Organic EL panel 11 Organic EL element 12 Anode terminal group 13 Cathode terminal group 2 First circuit board 21 First Land Group 22 Drive element 23 Second Land Group 24 Third Land Group 3 Second circuit board 31 Input section 32 Fourth Land 33 Fifth Land Group 34 Sixth Land Group

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H05B 33/14 H05B 33/14 AF term (reference) 3K007 AB18 BA06 BB07 CB01 CC05 DA01 DB03 EB00 FA02 5C080 AA06 BB05 DD23 DD30 JJ06 5C094 AA15 AA43 AA48 BA27 CA19 DB03 DB05 EB02 FA01 FA02 FA04 FB01 FB20 GB01 5G435 AA17 AA18 BB05 CC09 EE32 EE35 EE36 EE40 EE42 EE43 KK05

Claims (2)

[Claims] 1. An organic EL panel comprising an organic EL element in which a light-emitting organic layer is sandwiched between a pair of electrodes on a translucent support substrate, and a row-like array on at least two sides of the organic EL panel. An anode terminal group and a cathode terminal group of the organic EL element formed to be drawn out to a drive element, a drive element for selectively supplying a drive current to the anode terminal group and the cathode terminal group, the anode terminal group and the cathode terminal group A first land group connected to one of the terminal groups and arranged in a row, a second land group arranged to transmit a control signal to the driving element, and a second land. A third land group arranged in the same row as the group and connected to the other terminal group of the anode terminal group and the cathode terminal group, the drive element, and the first, second, and third land groups A flexible first circuit board including: and inputting the control signal Provided with an input unit of the order,
A fourth land group arranged in a row for connecting the control signal to the second land group, a fifth land group arranged in a row for connecting to the other terminal group, and A sixth land group connected to the third land group and arranged in the same row as the fourth land group for transmitting an output signal from the driving element to the other terminal group; An organic EL panel drive device comprising: a flexible second circuit board including fifth and sixth land groups. 2. The first circuit board and the second circuit board have the second, third land group and the fourth, sixth land group on the back surface side of the organic EL panel. 2. The organic E according to claim 1, wherein the organic E is electrically connected to each other.
L panel drive device.