JP2846802B2 - EL display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL display device, and more particularly to a wiring connection structure between an EL panel and a drive circuit board.

[0002]

2. Description of the Related Art A conventional EL display device will be described with reference to FIGS. 6 is a top view of a connection portion of the EL display device, FIG. 7 is a side view when FIG. 6 is viewed from the direction B, and FIG. 8 is a rear view of the EL panel of the EL display device.

[0003] Reference numeral 1 denotes an EL panel. The EL panel 1 is usually wired on a glass substrate so that a data side electrode and a scanning side electrode are orthogonal to each other, and is provided between the data side electrode and the scanning side electrode. It has a structure in which a first dielectric layer and a second dielectric layer made of SiO ₂ or Si ₃ N ₄ or the like, and a light emitting layer obtained by adding Mn to ZnS are sandwiched between the first and second dielectric layers. I have.

The EL panel 1 has a data-side electrode connection terminal 4 and a scanning-side electrode connection terminal 5 connected to the data-side electrode and the scanning-side electrode in four directions, up, down, left and right, around a display unit. When the data side FPC (flexible substrate) 2 and the scanning side FPC 3 are connected to the EL panel 1, the connection terminals 4 and 5 are connected to the data electrode driving ICs mounted on the data side FPC 2 and the scanning side FPC 3, respectively.
C10 and the scanning electrode driving IC12.

The data-side FPC 2 is provided with a flat cable 18 having a plug 19 for receiving a drive signal. The flat cable 18 is connected to the data electrode driving IC 10 via the data-side signal line 11. Similarly, a flat cable 18 having a plug 19 is provided in the scanning-side FPC 3, and is connected to the scanning electrode driving IC 12 via the scanning-side signal line 13.

A drive circuit board 14 is fixed to the back surface of the EL panel 1 with screws 15, and the data side FPC 2 and the scanning side FPC 3 are bent toward the back side of the EL panel 1 so as to be bent. By connecting the plug 19 to the upper connector 16, the drive signal from the drive circuit board 14 was sequentially transmitted to the corresponding electrodes.

[0007]

However, in the above-described wiring connection structure of the conventional EL display device, a total of four connectors 16 are required on the drive circuit board 14 so as to correspond to the data side FPC 2 and the scanning side FPC 3 respectively. Therefore, the number of parts increases, and furthermore, their connectors 1
In addition, the number of steps for connection with No. 6 increased, resulting in high costs and poor productivity.

The drive circuit board 14 needs to have a wiring pattern corresponding to the mounted connector 16, and when designing the wiring pattern of the drive circuit board 14, the connector 16 may Since the number of wirings connected to the connector 16 is easy to intersect, it is difficult to route the pattern.
It was necessary to design so as not to intersect, so that the degree of freedom in design was reduced.

Further, the data side FPC 2 and the scanning side FPC
In No. 3, since a wiring pattern for mounting a flat cable 18 to be connected to each of the connectors 16 is necessary, the degree of freedom in design is reduced similarly to the drive circuit board 14.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. An EL layer is provided between a scanning electrode and a data electrode arranged in a direction intersecting each other.
An EL panel having layers interposed therebetween, and an EL panel around the EL panel.
An EL display device comprising: an independent FPC (flexible printed circuit board) connected in each direction; and a drive circuit board connected to the FPC by a connection terminal and transmitting a drive signal for driving the EL panel. A signal communication line is formed at a corner of the panel where no electrode or the like is formed, and an adjacent FP is connected through the signal communication line.
The wiring pattern of C is connected.

[0011]

Therefore, according to the EL display device of the present invention, the EL
By using a signal connection line formed at a corner portion of the panel where no electrode or the like is formed, a drive signal can be supplied to a plurality of FPCs by one connection terminal extending from the drive circuit board. The number of components such as terminals can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the EL display device according to the present invention will be described below in detail with reference to FIGS. 1 is a top view of a connection portion of the EL display device, FIG. 2 is a side view when FIG. 1 is viewed from a direction A, and FIG. 3 is a rear view of an EL panel of the EL display device.

In FIGS. 1 to 3, the same reference numerals as those used in FIGS. 6 to 8 showing the prior art indicate the same parts.

First, the data side FPC 2 is placed on the EL panel 1.
And a data-side electrode connection terminal 4 connected to the scanning-side FPC 3
And the scanning-side electrode connection terminals 5 are formed. At this time, the signal connection lines 7 are formed in two dead spaces 6 of the four corners of the EL panel 1 where no electrodes or the like are formed at the same time.

A flat cable 8 having a plug 9 at its end is mounted on the data-side FPC 2. Half of the terminals of the flat cable 8 are connected to a data-side signal line 11 extending from a data electrode driving IC 10. Are connected to the scanning signal supply line 20.

The scanning electrode drive I is provided on the scanning side FPC 3.
C12 is mounted, and a scanning-side signal line 13 extends from the scanning electrode driving IC12.

When the EL panel 1 is connected to the data-side FPC 2 and the scanning-side FPC 3 with an anisotropic conductive film interposed between connection portions of wiring, the data-side FPC 2
2, the data-side electrode connection terminal 4 of the EL panel 1 is connected to the data electrode driving IC 10, and the terminal of the scanning signal supply line 20 connected to the flat cable 8 is formed in the dead space 6 of the EL panel 1. In the scanning side FPC 3, the scanning side electrode connection terminal 5 of the EL panel 1 is connected to the scanning electrode driving IC 12 and is connected to the scanning electrode driving IC 12. The extending scanning signal line 13 is connected to a terminal on the other side of the signal communication line 7. Subsequently, after a driving circuit board 14 is fixed to the back surface of the EL panel 1 with screws 15, the data side FPC 2 and the scanning side FPC 2 are fixed.
The display section of the EL display device and its drive section are formed by bending the PC 3 toward the back side of the EL panel 1 and connecting the plug 9 provided on the data side FPC 2 to the connector 16 on the drive circuit board 14. Can be.

That is, the connector 16 on the drive circuit board 14 is connected to the plug 9 of the flat cable 8, and half of the terminals of the flat cable 8 are connected to the data FPC 2 via the data signal line 11. And the other half of the terminals are connected to the scan electrode drive IC 12 on the scan side FPC 3 via the scan signal supply line 20 and the signal communication line 7 formed in the dead space 6. doing.

As a result, the drive signal from the drive circuit board 14 is transmitted to the data electrode drive IC via the plug 9 and the flat cable 8 provided on the data side FPC 2.
The signal is transmitted to not only 10 but also the scan electrode drive IC 12 on the adjacent scan-side FPC 3.

Therefore, in this embodiment, the scanning side F
The PC 3 does not need the flat cable 8 for receiving the supply of the drive signal from the drive circuit board 14, and only requires two sets of the plug 9 and the flat cable 8 in the data-side FPC 2. , Only two connectors 16 are required.

FIG. 4 shows the dead space 6 of the EL panel 1.
3 shows various formation patterns of the signal communication line 7 formed in FIG.

As shown in FIGS. 4 (a) to 4 (f), the shape and structure of the glass substrate and the pattern such as the shape of the connection wiring and the number of lines are optimized according to the obstacle 17 and the like existing on the substrate. It can be formed as

In this embodiment, two sets of flat cables 8 and connectors 16 are used. However, the present invention is not limited to this, and as shown in FIG. 8 and the connector 16.

In this case, the flat cable 8 is connected to one data side FPC2 of a total of four FPCs, that is, the data side FPC2 and the scanning side FPC3, which are two at the top, bottom, left and right of the periphery of the EL panel 1. Implemented
The flat cable 8 is connected to the connector 1 of the drive circuit board 14.
6 and a plug 9.

The terminals of the flat cable 8 are divided into approximately four parts and connected to the four FPCs, respectively.
In order to connect to an FPC located at a more distant position, the signal communication line 7 as in the above-described embodiment is used, or a wiring pattern for transmitting a drive signal to an empty space of the FPC is formed. And one flat cable 8 is connected to all four data-side FPCs 2 and scanning-side FPCs 3.

When drive signals corresponding to each of the four FPCs are generated from the drive circuit board 14, the drive signals are transmitted via the connector 16, plug 9, and flat cable 8 to the corresponding data-side FPC 2. And transmitted to the scanning-side FPC 3.

Therefore, the embodiment shown in FIG. 5 can be dealt with by using one flat cable 8 and one connector 16 for driving the EL panel 1, so that the components shown in FIG. It indicates the possibility of reducing the number.

[0028]

As described above, in the EL display device of the present invention, the driving from the driving circuit board is performed by using the signal communication lines formed at the corners where the electrodes and the like on the EL panel are not formed. A drive signal is supplied to a plurality of FPCs with one connection terminal that transmits a signal, and the drive control of the FPCs can be performed. Therefore, the number of connection terminals can be reduced.

Therefore, the cost and the number of working steps can be reduced by reducing the number of parts.

In the drive circuit board, the number of connectors to be connected to the connection terminals is reduced, so that the number of wiring patterns corresponding to each of the connectors is reduced on the board in accordance with the decrease in the number of connectors. The degree of freedom in pattern design on the drive circuit board can be increased.

Further, in the FPC, it is necessary to provide a pattern for connecting to the connection terminal.
Since there is no need to provide a pattern for connecting to the connection terminal on the FPC connected to the connection terminal via the signal communication line on the panel, the degree of freedom in designing the pattern of the FPC can be increased.

[Brief description of the drawings]

FIG. 1 is a top view showing a connection portion of an EL display device according to an embodiment of the present invention.

FIG. 2 is a side view from the direction A in FIG. 1;

FIG. 3 is a back view of an EL panel in the device.

FIG. 4 is an explanatory diagram showing various formation patterns of signal communication lines formed in a dead space of an EL panel.

FIG. 5 shows an EL display device according to another embodiment of the present invention.
The back view of a panel.

FIG. 6 is a top view showing a connection portion of a conventional EL display device.

FIG. 7 is a side view from the direction B in FIG. 1;

FIG. 8 is a rear view of an EL panel in the device.

[Explanation of symbols]

 Reference Signs List 1 EL panel 2 Data side FPC 3 Scanning side FPC 4 Data side electrode connection terminal 5 Scanning side electrode connection terminal 6 Dead space 7 Signal connection line 8, 18 Flat cable 9, 19 Plug 10 Data electrode drive IC 11 Data side signal line 12 Scan electrode drive IC 13 Scan side signal line 14 Drive circuit board 15 Screw 16 Connector 17 Obstacle 20 Scan signal supply line

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H05K 1/14 G09F 9/30 365

Claims (1)

(57) [Claims] 1. An EL panel having an EL layer provided between scanning-side electrodes and data-side electrodes arranged in directions intersecting with each other, and connected in four directions around the EL panel. An EL display device comprising: an independent FPC (flexible printed circuit board); and a drive circuit board connected to the FPC via a connection terminal and transmitting a drive signal for driving the EL panel. An EL display device, characterized in that a signal communication line is formed at a corner where no is formed, and a wiring pattern of an adjacent FPC is connected via the signal communication line.