JP2018205344A - Image display device - Google Patents

Abstract

To provide an image display device capable of achieving the reduction in manufacturing cost, improvement in productivity, and improvement in quality.SOLUTION: In an image display device, an FPC9 is electrically connected to an image display panel 1 having a pixel 12 in a clearance that is formed by pasting a first substrate 2 on a second substrate 3 via a seal material 4. A first inlet 5 is disposed at a position adjacent to an electric connection portion between the image display panel 1 and the FPC9. The first inlet 5 is sealed by a part of a protective resin 8 covering the electric connection portion between the image display panel 1 and the FPC9.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image display device.

  FIG. 2A is a top view showing an example of an image display device in the prior art, and FIG. In the image display device shown in FIG. 2, the image display panel 1 includes a first substrate 2 made of a semiconductor substrate such as silicon having pixels 12 such as a plurality of EL (Electro Luminescence) elements formed on the surface, and a transparent substrate such as glass. An EL panel in which a filling resin 7 is filled in a gap formed by adhering a second substrate 3 made of the above to a second substrate 3 through a sealing material 4 at a predetermined position and interval, and the first substrate of the image display panel 1 2 is electrically connected to the FPC 9 to constitute an image display device. The sealing material 4 is disposed so as to surround the plurality of pixels 12, and a first injection port 5 for injecting a filling resin 7 from the outside between the first substrate 2 and the second substrate 3 and a second one are partly provided. Two inlets 6 are provided. The first inlet 5 and the second inlet 6 are sealed with a sealing material 11 made of resin or the like. The FPC 9 and the first substrate 2 are connected via an ACF (anisotropic conductive film) 10, and the connecting portion is covered with a protective resin 8.

  In the above conventional configuration, since the protective resin 8 and the sealing material 11 are separately applied, there is a problem that the number of application steps increases. A configuration for solving this is described in Patent Document 1. In this configuration, the injection port is sealed by a part of the protective resin that covers the connection portion between the EL panel and the FPC. According to this configuration, since the protective resin and the sealing material are used together, the number of steps for applying the sealing material to the injection port can be reduced.

JP2001-203076

  In the conventional configuration described in Patent Document 1, since the injection port is disposed at a position away from the connection portion of the FPC, the protective resin must be applied over a wide range, and the amount of the protective resin applied increases. As the manufacturing cost increases, the stress due to expansion and contraction of the protective resin increases, which may reduce image quality. Moreover, since it takes time until the protective resin reaches the entire application region, the number of manufacturing steps increases.

  The above problems are not limited to an image display device using an EL panel, and an image using a liquid crystal panel in which liquid crystal is injected between a first substrate and a second substrate from an injection port provided in a sealing material. This also occurs in the case of a display device or the like.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image display device capable of realizing reduction in manufacturing cost, improvement in productivity, improvement in quality, and the like.

  An image display panel in which a pixel is provided in a gap formed by bonding the first substrate and the second substrate through a sealing material, and an opening communicating with the clearance is provided in the sealing material; An image display device having an electrical signal transmission member electrically connected to the image display panel and transmitting an electrical signal to the image display panel, wherein the electrical connection between the image display panel and the electrical signal transmission member The connection part is covered with a protection member, the opening is provided at a position adjacent to the electrical connection part, and the opening is sealed by a part of the protection member. And

  The opening may be an image display device provided at a position adjacent to the center of the electrical connection portion.

  The gap formed between the first substrate and the second substrate is filled with a filling member that protects the pixels, and the protection member is in contact with the filling member exposed from the opening. It may be an image display device.

  The protective member may be an image display device in contact with the filling member inside the opening.

  The protective member may be an image display device that is in contact with the sealing material inside the opening.

  The opening includes a first opening and a second opening, and the first opening and the second opening are provided along an extending direction of the electric signal transmission member, and the first opening Is provided at a position adjacent to the electrical connection portion, and the second opening portion is an image display device provided at a position facing the first opening portion across the region where the pixels are provided. There may be.

  According to the present invention, the opening of the sealing material is provided at a position adjacent to the electrical connection between the image display panel and the outside, and the opening is sealed with a part of the protective member covering the electrical connection. By doing so, it is possible to realize reduction in manufacturing cost, improvement in productivity, improvement in quality, and the like.

(A) Top view which shows one Example of the image display apparatus in this invention, (b) AA sectional drawing (A) Top view showing an example of an image display device in the prior art, (b) AA sectional view

  FIG. 1A is a top view and FIG. 1B is a cross-sectional view taken along line AA, showing an embodiment of an image display device according to the present invention. In this embodiment, the image display panel 1 includes a first substrate 2 made of a semiconductor substrate such as silicon having a plurality of EL elements and other pixels 12 formed thereon, and a second substrate 3 made of a transparent substrate such as glass. Is an EL panel in which a filling resin 7 is filled in a gap formed by adhering through a sealant 4 at a predetermined position and interval, and the FPC 9 is electrically connected to the first substrate 2 of the image display panel 1. It is configured as an image display device by being connected.

  The filling resin 7 is for protecting the plurality of pixels 12 formed on the surface of the first substrate 2 from external moisture and the like, and is provided so as to cover the entire formation region (image display region) of the plurality of pixels 12. It has been.

  The sealing material 4 is made of an ultraviolet curable resin or the like, and is disposed in an image non-display area around the image display area so as to surround the image display area, and the filling resin 7 is externally provided between the first substrate 2 and the second substrate 3. It plays a role in preventing the outflow. A part of the sealing material 4 is provided with a first injection port 5 and a second injection port 6 for injecting a filling resin 7 from the outside between the first substrate 2 and the second substrate 3. The first inlet 5 and the second inlet 6 are formed as projecting openings extending to the outer peripheral end face of the image display panel 1 and are provided along the extending direction of the FPC 9. The first injection port 5 is provided at a position adjacent to the center of the connecting portion between the FPC 9 and the first substrate 2, and the second injection port 6 is provided at a position facing the first injection port 5 across the image display region. ing. The opening end surface of the first injection port 5 is provided in the direction facing the connection portion between the FPC 9 and the first substrate 2, and the opening end surface of the second injection port 6 is the side facing the connection portion between the FPC 9 and the first substrate 2. It is provided to face the opposite side. The first injection port 5 and the second injection port 6 have the same function as each other, but when the filling resin 7 is injected between the first substrate 2 and the second substrate 3, one of them is an exhaust port. May be used as

  The electrode provided on the upper surface of the first substrate 2 of the image display panel 1 and the electrode provided on the lower surface of the FPC 9 are electrically connected by pressure bonding via the ACF 10, and are connected to the plurality of pixels 12 via the FPC 9. Various image displays are performed by applying an electrical signal from the outside. The electric signal transmitted through the FPC 9 is not limited to the electric signal for driving the pixel 12 but for driving other driving units of the image display panel 1 and electronic components attached to the image display panel 1. May include electrical signals.

  A connecting portion between the FPC 9 and the first substrate 2 is covered and protected by a protective resin 8 made of a moisture curable resin such as a silicon resin or a thermosetting resin such as an epoxy resin. Further, the protective resin 8 is also applied between the side surface of the first substrate 2 and the lower surface of the FPC 9 (stepped portion), and the FPC 9 is reinforced so as not to peel from the first substrate 2.

  The protective resin 8 is also used as a sealing material for sealing the first injection port 5, and the first injection port 5 is sealed with a part of the protective resin 8. In this state, the protective resin 8 is in contact with the end surface of the first substrate 2, the end surface of the sealing material 4 forming the first injection port 5, the filling resin 7 exposed from the opening end surface of the first injection port 5, and the like. . When the filling resin 7 is not filled up to the opening end surface of the first inlet 5 and there is a gap inside the first inlet 5, a part of the protective resin 8 enters the gap, and the first The sealant 4 and the filling resin 7 are brought into contact with the inside of the inlet 5. In this case, since adhesion between each member becomes denser, moisture permeation into the image display panel 1 and separation between each member are effectively prevented.

  The second inlet 6 is sealed with a sealing material 11 different from the protective resin 8. However, the second inlet 6 may be sealed with a part of the protective resin 8 similarly to the first inlet 5. In this case, the protective resin 8 is applied so as to extend from the connection portion between the FPC 9 and the second substrate 3 to the second inlet 6 through the outer peripheral portion of the image display panel 1, and one of the extended protective resins 8. The second inlet 6 is sealed at the portion.

  In this embodiment, since the first injection port 5 is provided at a position adjacent to the connection portion between the FPC 9 and the first substrate 2, a part of the protective resin 8 covering the connection portion between the FPC 9 and the first substrate 2. Thus, the first inlet 5 can be efficiently sealed, and the productivity can be improved. Moreover, since the usage-amount of the protective resin 8 can be reduced compared with the prior art described in patent document 1, a manufacturing cost can be reduced. Moreover, since the projection to the exterior by the sealing material 11 which seals the 1st injection port 5 like the prior art shown in FIG. 2 is lose | eliminated, the external size of an image display apparatus can be made small. Further, since the second injection port 6 is provided along the extending direction of the FPC 9, the protrusion to the outside by the sealing material 11 that seals the second injection port 6 is in a direction orthogonal to the extending direction of the FPC 9. The external size of the image display device can be reduced in that direction. Further, since the first injection port 5 is adjacent to the center of the connecting portion between the FPC 9 and the first substrate 2, the first injection port 5 can be reliably sealed with a sufficient amount of the protective resin 8, In particular, since the opening end face of the first injection port 5 is provided in a direction facing the connecting portion between the FPC 9 and the first substrate 2, the effect is higher. Further, since the connecting portion between the FPC 9 and the first substrate 2 is provided at a step portion (offset portion) between the first substrate 2 and the second substrate 3, the height of the protective resin 8 is set to the upper surface of the second substrate 3. Can be kept to the same level or lower.

  Injection of the filling resin 7 is performed in a chamber whose inside is in a vacuum state, and one of the first injection port 5 and the second injection port 6 of the image display panel 1 (for example, the first injection port 5) is liquid. Filled resin 7 is injected into the inside of the image display panel 1 by capillary action by immersing in resin and evacuating the chamber. At this time, the inlet (for example, the second inlet 6) opposite to the side immersed in the resin is used as an exhaust for keeping the inside of the image display panel 1 in a vacuum state.

  The filling resin 7 injected into the image display panel 1 is cured by irradiating it with ultraviolet rays. Thereafter, the FPC 9 is connected to the first substrate 2 of the image display panel 1 by the ACF 10, and then the protective resin 8 is collectively applied to the connection portion between the FPC 9 and the first substrate 2 and the opening end surface of the first injection port 5. At the same time, a sealing material 11 is separately applied to the opening end face of the second inlet 6 and cured by a predetermined curing process such as moisture absorption or heat treatment.

  An arbitrary material can be used for the filling resin 7, but stress is generated between the filling resin 7 and the protective resin 8 due to a difference in expansion coefficient between them, which causes problems in the operation of the image display panel 1. In such a case, such a problem can be alleviated by using the filling resin 7 and the protective resin 8 made of materials having the same linear expansion coefficient. In that case, the filling resin 7 and the protective resin 8 may be made of different materials. However, when the linear expansion coefficients are made the same, they may be made of the same material.

  The resin inlets formed in a part of the sealing material 4 are not limited to two places, and may be provided only at one place or at three or more places as necessary. For example, when it is provided at only one place, only the first inlet 5 is provided, and when it is provided at three places, two first inlets 5 and one second inlet 6 or one first inlet 5 are provided. Two second inlets 6 are provided.

  The position of the first inlet 5 is not limited to the position adjacent to the center of the connection portion between the FPC 9 and the first substrate 2, but may be the position adjacent to the end portion of the connection portion between the FPC 9 and the first substrate 2. good.

  The filling resin 7 may be replaced with other media (oil, liquid, gas, vacuum atmosphere, etc.).

  The image display panel 1 is not limited to an EL panel, and may be a liquid crystal panel in which liquid crystal is filled between the first substrate 2 and the second substrate 3. In this case, the pixel 12 is formed by sandwiching liquid crystal between a pixel electrode provided on the first substrate 2 and a counter electrode provided on the second substrate 3.

  A member for connecting the image display panel 1 and the FPC 9 is not limited to the ACF 10 but may be a conductive resin or solder.

  The FPC 9 may be replaced with a rigid circuit board or a wire made of a glass epoxy board.

  The protective resin 8 may be replaced with a material different from the resin.

DESCRIPTION OF SYMBOLS 1 Image display panel 2 1st board | substrate 3 2nd board | substrate 4 Sealing material 5 1st injection port 6 2nd injection port 7 Filling resin 8 Protection resin 9 FPC
10 ACF
11 Sealing material 12 pixels

Claims (6)

An image display panel in which a pixel is provided in a gap formed by bonding the first substrate and the second substrate through a sealing material, and an opening communicating with the gap is provided in the sealing material;
An electrical signal transmission member that is electrically connected to the image display panel and transmits an electrical signal to the image display panel;
An image display device comprising:
An electrical connection between the image display panel and the electrical signal transmission member is covered with a protective member,
The opening is provided at a position adjacent to the electrical connection;
The opening is sealed by a part of the protective member,
An image display device characterized by that.   The image display device according to claim 1, wherein the opening is provided at a position adjacent to a center of the electrical connection portion.   The gap formed between the first substrate and the second substrate is filled with a filling member that protects the pixels, and the protection member is in contact with the filling member exposed from the opening. The image display device according to claim 1, wherein the image display device is an image display device.   The image display device according to claim 3, wherein the protection member is in contact with the filling member inside the opening.   The image display device according to claim 4, wherein the protection member is in contact with the sealing material inside the opening.   The opening includes a first opening and a second opening, and the first opening and the second opening are provided along an extending direction of the electric signal transmission member, and the first opening Is provided at a position adjacent to the electrical connection portion, and the second opening portion is provided at a position facing the first opening portion across the region where the pixel is provided. The image display device according to claim 1.

Images