JP2002108232A - Display device and its manufacturing method and electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which connection pins and a display panel are connected with high joining strength. SOLUTION: An electrode terminal 33 is provided at a terminal part 32 existing along one side of the panel substrate 34 of a display panel 30 and clipping parts 12 of the connection part 10 are connected electrically to the electrode terminal 33 while holding the terminal 33 between them. Moreover, the clipping parts 12 are adhered to the terminal part 32 of the substrate 34 by a resin part 37. The resin part 37 consisting of plural layers 38, 39 adheres the clipping part 12, to the terminal part 32 of the substrate 34 in a state covering the back side clipping piece 14 positioned at a side opposite to the side where the electrode 33 of the substrate 34 is arranged. At least either a terminal side clipping piece 13 or the back side clipping piece 14 is provided with a projected part projecting in a direction roughly parallel with the one side along which the electrode terminal 33 of the substrate 34 is formed or an opening part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a connection pin which sandwiches an edge portion of a display panel and is bonded with a resin, a method of manufacturing the same, and an electronic apparatus.

[0002]

2. Description of the Related Art In order to electrically connect a display panel having terminals on edges along one side to a circuit board or the like, for example, as shown in FIG. The connect pin 10 including the clip portion 12 and the extending portion 16 may be used. In this connection, as shown in FIG. 10, the terminal portion of the panel substrate of the display panel 30 is sandwiched by the clip portion 12 of the connect pin 10, and the clip portion is electrically connected to the electrode terminal provided on the panel substrate. Then, the extension 16 of the connect pin 10 is electrically connected to the circuit board 50 or the like. Then, although not shown in this figure, the clip portion 12 and the terminal portion of the display panel 30 are adhered to each other with a resin, thereby increasing the bonding strength between the connect pin 10 and the panel substrate and suppressing invasion of moisture and the like. Improves the reliability of electrical connections.

By the way, in such a structure, the mechanical bonding strength between the connect pin and the display panel is sufficient in order to maintain connection reliability even in various use environments, for example, when an external impact is applied. Is required. In particular, the strength against the pulling force acting in the direction in which the clip portion holding the panel substrate is pulled out may not be sufficient depending on the use environment.

[0004] The present invention has been made in view of the above points, and an object thereof is to provide a display device in which a connect pin and a display panel are connected with high bonding strength, a method of manufacturing the display device, and electronic equipment. Is to do.

[0005]

(1) A display device according to the present invention comprises a panel substrate, a display panel having an electrode terminal at an edge along one side of the panel substrate, and an edge of the panel substrate. A connect pin having a clip portion that is electrically connected to the electrode terminal by holding the clip portion, and a resin portion that adheres the clip portion to an edge of the panel substrate;
The clip portion includes a terminal-side clip piece located on the side of the panel substrate on which the electrode terminal is disposed, and a back-side clip disposed on a side of the panel substrate opposite to the side on which the electrode terminal is disposed. And the resin portion adheres the clip portion to an edge of the panel substrate in a state in which the resin portion covers the back side clip portion.

According to the present invention, since the clip portion is bonded to the edge of the panel substrate by the resin portion in a state where the resin portion covers the clip portion on the back side of the clip portion, the resin is close to the back portion near the clip portion on the back side. The clip portion can be joined to the edge portion of the panel substrate with greater strength than when the side clip piece and the panel substrate are arranged only in the region close to the panel substrate.

(2) The display device according to the present invention is characterized in that the resin portion has a plurality of layers.

For this reason, if the inner layer is first formed of a low-viscosity resin, the area close to the clip portion and the edge of the panel substrate can be surely spread by the capillary phenomenon. Then, if the outer layer is formed of a high-viscosity resin, it is possible to cover the back side clip piece with the resin without flowing the resin to unnecessary portions, and to obtain a sufficient bonding strength between the connect pin and the display panel. A resin portion having a required thickness can be formed. In this way, the bonding strength can be increased as compared with the case where the resin portion is composed of only one layer.

(3) A display device according to the present invention comprises a panel substrate, a display panel having an electrode terminal at an edge along one side of the panel substrate, and the electrode sandwiching the edge of the panel substrate. A connection pin having a clip portion electrically connected to a terminal; and a resin portion for bonding the clip portion to an edge of the panel substrate, wherein the clip portion has the electrode terminal disposed on the panel substrate. A terminal-side clip piece located on the side of the panel, and a back-side clip piece disposed on a side of the panel substrate opposite to the side on which the electrode terminal is placed, wherein the terminal-side clip piece and the back side At least one of the clip pieces has an opening.

According to the present invention, at least one of the terminal-side clip piece and the back-side clip piece has an opening, so that the resin portion is securely disposed in the area near the clip portion and the edge of the panel substrate. And a sufficient bonding strength between the connect pin and the display panel can be reliably obtained. The presence of the opening increases the frictional force between the clip portion and the panel substrate with respect to the pulling force acting in the direction in which the clip portion holding the panel substrate is pulled out, so that the strength against the tensile force acting in that direction is increased. Increase.

(4) A display device according to the present invention comprises a panel substrate, a display panel having an electrode terminal at an edge along one side of the panel substrate, and the electrode having an edge of the panel substrate sandwiched therebetween. A connection pin having a clip portion electrically connected to a terminal; and a resin portion for bonding the clip portion to an edge of the panel substrate, wherein the clip portion has an electrode terminal arranged on the panel substrate. A terminal-side clip and a rear-side clip disposed on a side of the panel substrate opposite to the side on which the electrode terminals are disposed, and the terminal-side clip and the rear-side clip Is characterized by having a projection projecting in a direction substantially parallel to the one side of the panel substrate.

According to the present invention, the presence of the protrusion increases the frictional force between the clip and the resin with respect to the pulling force acting in the direction of pulling out the clip holding the panel substrate. , The strength against the pulling force acting on the surface increases.

(5) The display device according to the present invention, in any one of the display devices described above, further comprising a circuit board, wherein the connect pin includes an extending portion extending from the clip portion. The circuit board and the circuit board are electrically connected.

According to the present invention, as described above, through the connect pins that are joined to the display panel with high strength,
A display device in which the display panel and the circuit board are electrically connected is obtained.

(6) An electronic apparatus according to the present invention uses any one of the display devices described above as a display unit.

(7) The method for manufacturing a display device according to the present invention is the method for manufacturing a display device according to (2), wherein a low-viscosity resin is applied to a region where the clip portion and the edge portion are close to each other. And a step of positioning and curing a high-viscosity resin so as to be in close contact with the cured resin and to cover the back-side clip.

According to the present invention, first, the low-viscosity resin can be spread to the region near the clip portion and the panel substrate by capillary action. Then, after curing the low-clay resin, it is placed in close contact with the resin layer so that the high-viscosity resin covers the back side clip piece,
It is possible to form a resin portion having a thickness necessary for obtaining sufficient bonding strength between the connect pin and the display panel without flowing the resin to unnecessary portions.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below more specifically with reference to the drawings.

1. <First Embodiment> FIG. 1 shows a connect pin 1 used in the present embodiment.
It is a typical perspective view of No. 0. As shown in this figure, a connect pin 10 is provided with a clip portion 12 formed in a clip shape and electrically connected to an electrode terminal of a terminal portion of a display panel.
And an extending portion 16 extending from the clip portion 12 and soldered to the circuit board. The clip section 12
One clip piece, that is, a terminal-side clip piece 13 and a back-side clip piece 14 are provided. Connect pin 10
Usually, a plurality is arranged at a predetermined pitch, for example, about 1.5 to 3.0 mm. In addition, the connect pins are applicable not only to the predetermined pitch but also to random arrangement or mounting as a single product. In this figure, a connecting portion 20 that connects the ends of the extending portion 16 is shown. Connecting part 20
Are provided to prevent the extension portions 16 from being deformed in the process of connecting the connect pins 10 and to keep the plurality of connect pins 10 at a predetermined pitch.
Is disconnected after being connected to the terminal portion of the display panel. The connect pin 10 has an F-shaped side surface, is called an F type or a DIP type, and is formed so as to hold the liquid crystal panel substantially perpendicular to the extending portion. The connecting pin 10 includes phosphor bronze for spring (PBSR-1 / 2H, P
A material obtained by subjecting a material such as BSR-H), special aluminum brass (TSB), or cold-rolled steel (SPCC) to solder plating is used.

FIG. 2 is a schematic view showing a display device 6 in which the connect pins 10 are connected and fixed to a liquid crystal panel 30 as a display panel. As shown in this figure, the liquid crystal panel 30 is joined to each other via a spacer along one side thereof with one of the two panel substrates 34 protruding from the other panel substrate 34,
The protruding edge is a terminal portion 32. The display device 6, for example, as shown in FIG. 10 as a schematic diagram,
The circuit board 50 is soldered with the connecting pin extending portions 16 inserted into the through holes 52 of the circuit board 50.
Is electrically connected to The electrical connection between the connect pin 10 and the circuit board 50 is performed by providing a socket on the circuit board 50 and providing the socket with the extending portion 16 of the connect pin 10.
May be inserted.

FIG. 3 is a view showing a terminal 32 of the liquid crystal panel 30 with the connect pin 10 in the display device 6 shown in FIG.
FIG. 4 is an enlarged schematic view showing the vicinity of a region where is connected.
As shown in this figure, an electrode terminal 33 is provided on a terminal portion 32 of the liquid crystal panel 30. The clip portion 12 of the connect pin 10 has a terminal-side clip piece 13 located on the side of the panel substrate 34 where the electrode terminal 33 is disposed, and a side opposite to the side of the panel substrate 34 where the electrode terminal 33 is disposed. The terminal portion 32 to which the conductive material 35 is applied is sandwiched in a state where the back side clip piece 14 is located at the rear side. As a result, the terminal side clip piece 13 located on the side where the electrode terminal 33 is disposed is connected to the electrode terminal 3 of the terminal portion 32.
3 is electrically connected. As the conductive material 35, a carbon-based paste, a silver-based paste, or a copper-based paste is used.

Further, the clip portion 12 connected to the terminal portion 32 is adhered and covered with the resin portion 37, for example, an ultraviolet curable resin. by this,
The joining force between the terminal portion 32 and the clip portion 12 is strengthened and improved. Further, the resin portion 37 also plays a role of improving the moisture resistance of the display device 6. In particular, in the present embodiment, the resin portion 37 is in a state of covering the back side clip piece 14 and adheres the clip portion 12 to the edge portion of the panel substrate, that is, the terminal portion 32. As a material of the resin portion 37, a methacrylate resin, an epoxy resin, or the like can be used.

As described above, in the display device 6 according to the present embodiment, the clip portion 12 is mounted on the panel substrate 34 while the resin portion 37 covers the rear side clip piece 14 of the clip portion 12.
Since the resin is adhered to the terminal portion 32 of the rear side, the resin near the rear side clip piece 14 is disposed only in the region where the rear side clip piece 14 and the panel substrate 34 are close to each other.
The clip portion 12 can be joined to the terminal portion 32 with high strength. According to the experiment of the present inventor, the panel substrate 3
The tensile strength in the direction in which the clip portion 12 holding the clip 4 is pulled out is 1 when the resin is disposed in the vicinity of the back side clip piece 14 only in the region where the back side clip piece 14 and the panel substrate 34 are close to each other. In contrast to 0.8 kg · G per book connect pin, in the present embodiment, it was 3.0 kg · G per book connect pin.

2. <Second Embodiment> The second embodiment is different from the first embodiment in the structure of a resin portion for bonding a clip portion to a panel substrate. In the following, only portions different from the first embodiment will be described. Otherwise, the present embodiment is configured similarly to the case of the first embodiment. Note that the same reference numerals as those in the first embodiment are used for corresponding parts in the drawings.

FIG. 4B is a schematic diagram showing an enlarged view of the vicinity of the region where the connect pins 10 and the terminal portions 32 of the liquid crystal panel 30 are connected in the display device 6 according to the present embodiment. As shown in this figure, in the present embodiment, the resin portion 37 covers the first layer 38 disposed in a region near the terminal portion 32 and the connect pin 10, and covers the first layer 38 and covers the back side clip piece 14. 2 with the second layer 39 arranged as
It is formed from three layers.

In forming the resin portion 37, first,
Terminal part 32 and clip part 1 which are edges of panel substrate 34
The first layer 38 is formed as shown in FIG. 4A by setting a low-viscosity resin in a region close to the region 2 and curing the resin. Since the low-viscosity resin can spread to the region where the clip portion 12 and the terminal portion 32 of the panel substrate 34 are close to each other due to the capillary phenomenon, the resin can be reliably applied to the region where the clip portion 12 and the terminal portion 32 are close to each other. Can be located. The low-viscosity resin has a viscosity of 1
A resin of about 000 to 7000 cP (centipoise) can be used.

Next, a second layer 39 is formed by positioning and curing a high-viscosity resin so as to be in close contact with the first layer 38 formed of the cured resin and to cover the back side clip piece 14. As shown in FIG. 4B, a resin portion 37 composed of two layers is obtained. As described above, since the second layer 39 is formed in such a manner that the high-viscosity resin is disposed in close contact with the first layer 38 so as to cover the rear-side clip piece 14, as in the case where the low-viscosity resin is used. Unnecessary area, for example, polarizing plate 4
The resin portion 37 having a thickness necessary for obtaining a sufficient bonding strength between the connect pin 10 and the display panel 30 can be formed without flowing the resin to the region where the 5 is attached. The high-viscosity resin has a viscosity of 7000 c
A resin of about P (centipoise) or more can be used.

As described above, the resin portion 37 is divided into the two layers 38 and 3.
9, the present inventor has found that the bonding strength is increased as compared with the case where the resin portion 37 is formed of only one layer (even if the resin layer is formed thick using a high-viscosity resin). Confirmed by experiment.

3. <Third Embodiment> The third embodiment is slightly different from the first embodiment in the shape of the clip portion. In the following, only portions different from the first embodiment will be described. Otherwise, the present embodiment is configured similarly to the case of the first embodiment. Note that the same reference numerals as those in the first embodiment are used for corresponding parts in the drawings.

FIG. 6 is a schematic diagram showing, in an enlarged manner, the vicinity of the region where the connect pins 10 and the terminal portions 32 of the liquid crystal panel 30 are connected in the display device 6 according to the present embodiment. FIG. 5 is a schematic perspective view showing the connect pin 10 used in the present embodiment. FIG. 6 shows a state in which the plurality of connect pins 10 are connected by the connecting portions 20. The connecting portions 20 are cut and removed after the connect pins 10 are attached to the liquid crystal panel 30. As shown in these drawings, in the present embodiment, the back side clip piece 14 of the clip portion 12 has an opening 60. In addition, the opening 60 may be formed in the terminal-side clip piece 13, or may be formed in both the terminal-side clip piece 13 and the back-side clip piece 14.

As described above, in this embodiment, since at least one of the terminal side clip piece 13 and the back side clip piece 14 has the opening 60, the opening 60
The resin portion 37 is connected to the clip portion 12 and the panel substrate 34 through the
And the liquid crystal panel 30 can be reliably provided with a sufficient bonding strength between the connect pin 10 and the liquid crystal panel 30. Further, the clip portion 12 and the panel substrate 3 against the pulling force acting in the direction in which the clip portion 12 holding the panel substrate 34 is pulled out.
4 is increased by the presence of the opening 60, so that the strength against the pulling force acting in that direction is increased.

4. <Fourth Embodiment> In the fourth embodiment, the shape of the clip portion is slightly different from that of the first embodiment. In the following, only portions different from the first embodiment will be described. Otherwise, the present embodiment is configured similarly to the case of the first embodiment. Note that the same reference numerals as those in the first embodiment are used for corresponding parts in the drawings.

FIG. 7 shows the connection pins 10 and the terminals 3 of the liquid crystal panel 30 in the display device 6 according to the present embodiment.
FIG. 4 is a schematic enlarged bottom view of the vicinity of an area where the second clip is connected to the rear clip piece viewed from the side of the rear clip piece; Although the resin portion 37 is not shown in FIG.
Are formed in the same manner as in the first embodiment. As shown in FIG. 7, in the present embodiment, the back side clip piece 14 of the clip portion 12 is
2 is provided with a protruding portion 65 protruding in a direction substantially parallel to one side on which the second portion 2 is formed. The protrusion 65 may be formed on the terminal-side clip 13, or may be formed on both the terminal-side clip 13 and the back-side clip 14.

As described above, in the present embodiment, at least one of the back side clip piece 14 and the terminal side clip piece 13 projects in a direction substantially parallel to one side of the panel substrate 34 where the terminal portion 32 is formed. Projection 6
5, the frictional force between the clip portion 12 and the resin portion 37 against the pulling force acting in the direction in which the clip portion 12 holding the panel substrate 34 is pulled out increases due to the presence of the protrusion portion 65. The strength against the tensile force acting in that direction increases.

5. <Electronic Device Using Display Device> FIGS. 8A, 8B, and 8C are external views showing examples of electronic devices using the display device 6 of the first embodiment as a display unit. Note that the display device is not limited to the display device of the first embodiment, and a display device of another embodiment can be used. FIG. 8A shows a mobile phone 88 having a display device 6 above the front surface thereof. FIG. 8B shows a wristwatch 9.
2, a display unit using the display device 6 is provided at the center of the front of the main body. FIG. 8C illustrates a portable information device 96 including a display unit including the display device 6 and an input unit 98. Although not shown, these electronic devices include various circuits such as a display information output source, a display information processing circuit, and a clock generation circuit, and a power supply circuit that supplies power to those circuits, although not shown. It is configured to include a display signal generation unit. For example, in the case of the portable information device 96, a display image is formed by supplying a display signal generated by the display signal generation unit based on information input from the input unit 98 to the display unit.

The electronic devices into which the display device 6 of the present embodiment is incorporated are not limited to portable telephones, wristwatches, and portable information devices, but may be notebook computers, electronic notebooks, pagers, calculators, POS terminals, IC cards, Various electronic devices such as a mini-disc player are conceivable.

6. <Other Modifications> 6.1 In each of the above-described embodiments, an example in which a type called an F type or a DIP type is used as the connect pin 10 is shown. A type called a Y type or a SIP type shown as a schematic perspective view may be used. This type of connect pin 10 is formed so as to hold a terminal portion (edge) 32 of the liquid crystal panel 30 in a state substantially parallel to the extending portion 16.

6.2 In each of the embodiments described above,
The example in which the display panel to which the connect pin 10 is connected is the liquid crystal panel 30 has been described. However, the display panel to which the connect pins are connected is not limited to the liquid crystal panel 30, but may be another flat panel display panel having a terminal portion along at least one side, for example, a plasma display, an FED (Field
Emission Display).

6.3 Further, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention or within the equivalent scope of the claims. It is.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a connect pin used in a first embodiment.

FIG. 2 is a schematic diagram showing a display device in which the connect pins shown in FIG. 1 are connected to and fixed to a liquid crystal panel.

FIG. 3 is an enlarged schematic view showing the vicinity of a region where a connect pin and a terminal portion of a liquid crystal panel are connected in the display device shown in FIG. 2;

FIGS. 4A and 4B are schematic diagrams showing, in an enlarged scale, the vicinity of a region where a connect pin and a terminal portion of a liquid crystal panel are connected in a manufacturing process of a display device according to a second embodiment.

FIG. 5 is a schematic perspective view showing a connect pin used in a third embodiment.

FIG. 6 is a schematic diagram showing, in an enlarged manner, the vicinity of a region where a connect pin is connected to a terminal portion of a liquid crystal panel in a display device according to a third embodiment.

FIG. 7 is a schematic enlarged bottom view of the vicinity of a region where a connect pin and a terminal portion of a liquid crystal panel are connected in a display device according to a fourth embodiment, as viewed from a side of a back side clip piece;

FIGS. 8A, 8B, and 8C are external views showing examples of electronic devices using the display device of the first embodiment.

FIG. 9 is a schematic perspective view showing a Y-type connect pin.

FIG. 10 is a schematic diagram showing a display device formed by connecting a display panel and a circuit board with connect pins.

[Explanation of symbols]

 Reference Signs List 6 display device 10 connect pin 12 clip part 13 terminal side clip piece 14 back side clip piece 16 extension part 30 liquid crystal panel (display panel) 32 terminal part (edge) 33 electrode terminal 34 panel board 37 resin part 50 circuit board 60 Opening 65 Projection

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H092 GA52 GA55 GA56 NA15 NA27 NA30 5E077 BB11 BB26 BB31 BB34 CC02 CC22 DD01 DD15 EE13 FF22 JJ10 5G435 AA00 AA16 EE42 EE43 EE44 KK05 KK10

Claims (7)

[Claims] 1. A display panel comprising a panel substrate and an electrode terminal at an edge along one side of the panel substrate, and a clip for sandwiching an edge of the panel substrate and electrically connected to the electrode terminal. And a resin portion for bonding the clip portion to an edge of the panel substrate, wherein the clip portion is a terminal-side clip located on a side of the panel substrate on which the electrode terminal is arranged. And a rear-side clip piece disposed on a side of the panel substrate opposite to the side on which the electrode terminals are disposed, wherein the resin portion covers the rear-side clip piece, and Is adhered to an edge of the panel substrate. 2. The display device according to claim 1, wherein the resin portion has a plurality of layers. 3. A display panel comprising a panel substrate and having an electrode terminal at an edge along one side of the panel substrate; and a clip for sandwiching an edge of the panel substrate and being electrically connected to the electrode terminal. And a resin portion for bonding the clip portion to an edge of the panel substrate, wherein the clip portion is a terminal-side clip located on a side of the panel substrate on which the electrode terminal is arranged. And a rear-side clip piece disposed on a side of the panel substrate opposite to the side on which the electrode terminals are disposed. At least one of the terminal-side clip piece and the rear-side clip piece has an opening. A display device comprising a unit. 4. A display panel comprising a panel substrate and having an electrode terminal on an edge along one side of the panel substrate, and a clip for sandwiching an edge of the panel substrate and being electrically connected to the electrode terminal. And a resin portion for bonding the clip portion to an edge of the panel substrate, wherein the clip portion is a terminal-side clip piece located on a side of the panel substrate on which an electrode terminal is arranged. And a rear-side clip piece disposed on a side of the panel substrate opposite to the side on which the electrode terminals are disposed, and at least one of the terminal-side clip piece and the rear-side clip piece is provided on the panel substrate. A display device having a projection projecting in a direction substantially parallel to the one side. 5. The circuit according to claim 1, further comprising a circuit board, wherein the connect pin includes an extending portion extending from the clip portion, wherein the extending portion and the circuit are provided. A display device, wherein the display device is electrically connected to a substrate. 6. An electronic apparatus using the display device according to claim 1 as a display unit. 7. The method for manufacturing a display device according to claim 2, wherein a low-viscosity resin is located in a region where the clip portion and the edge portion are close to each other, and cured. A method of positioning and curing a high-viscosity resin so as to be in close contact with the resin and to cover the back side clip piece, and a method of manufacturing the display device.