JPH03233520A - Connection structure for display panel - Google Patents

Abstract

PURPOSE:To reduce the external form size of a display panel about the actual display range of the display panel and to obtain layout for size reduction by providing a notch on one corner of a carrier tape. CONSTITUTION:At least two carrier tapes adjacent to one corner part of the display panel among carrier tapes 4 and 5 arrayed at side parts intersecting orthogonally with each other while holding the corner part of the display panel there between are notched from sides facing the side parts to sides facing the display panel 1. Those notched parts can be put close to each other and never overlap with each other. Consequently, a margin on the display panel 1 which is required to bend and mount the carrier tapes 4 and 5 on the back surface of the display panel 1 can be reduced and the external form of the display panel about the actual display range is reducible in size.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a display panel connection structure.

[Prior Art] Conventionally, in small electronic devices, predetermined information is displayed on the liquid crystal display panel by driving the liquid crystal display panel with a plurality of semiconductor chips.

For example, a structure shown in FIG. 3 is known as a connection structure for this liquid crystal display panel. That is, in this liquid crystal display panel, liquid crystal is sealed between the opposing surfaces of a pair of upper and lower glass substrates 11 and 12, and connection terminals 2 are arranged on each side in the orthogonal direction. A plurality of rectangular carrier tapes 6 are electrically connected to the connection terminal 2 to a hard circuit board 3 arranged on the back side of the liquid crystal display panel l. Then, the carrier tape 6 is attached to the wiring pattern on which the semiconductor chip 7 for the drive circuit for driving the liquid crystal display panel l is formed.
The output terminal 6 connected to the liquid crystal display panel 1 and the input terminal 6 connected to the circuit board 3 extend from the wiring pattern.

In such a connection structure of the liquid crystal display panel 1, the carrier tape 6 is connected to the connection terminal 2 of the liquid crystal display panel l,
In order to prevent the carrier tapes 6 from overlapping each other when being bent and connected to the circuit board 3 disposed on the back surface of the liquid crystal display panel 1, the display panel is enlarged to provide a corresponding margin. At least, the orthogonal corners of the sides of the liquid crystal display panel were designated as corner areas B for extra space, and no connection terminals 2 were provided in those areas. Furthermore, the carrier tape 6 was not mounted either.

[Problem to be Solved by the Invention] However, in the connection structure described above, since each carrier tape 6 has a rectangular shape, it is necessary to prevent the carrier tapes 6 from overlapping each other on the circuit board 3 disposed on the back surface of the liquid crystal display panel l. In order to connect to the LCD panel, it is necessary to secure corner area B at least at the corner of the LCD panel as an area where the carrier tape cannot be mounted, and to provide a margin for the effective display range on the LCD panel. Therefore, a display panel outer shape A was required. This has caused problems in making the layout more compact.

In view of the above-mentioned circumstances, the purpose of the present invention is to prevent the carrier tapes from overlapping each other on the back surface of one display panel without providing a margin to prevent the carrier tapes from overlapping each other on one display panel. The purpose of the present invention is to provide a mounting structure for a display panel that does not require a display panel.

[Means for Solving the Problems] In order to solve the above problems, the display panel connection structure of the present invention includes carrier tapes arranged on sides orthogonal to each other across one corner of the display panel. Inside, at least two carrier tapes adjacent to the corner of the display panel are cut out from the side opposite to the corner to the side opposite to the display panel, and both carrier tapes are cut out to form the display panel. This prevents them from overlapping when folded toward the back of the panel.

[Function] According to the present invention, the two carrier tapes arranged on each orthogonal side of the display panel have one corner extending from the side facing the angle of the display panel to the side facing the display panel. It is formed by cutting it out, connects it to connection terminals arranged on each side of the display panel, and is mounted by bending it to the back surface of the display panel.

Therefore, carrier tapes that are mounted facing each other across the corners of the display panel can bring their notches closer together, and do not overlap each other. There is no need for the extra space on the display panel required for folding and mounting on the back of the panel, and the outer size of the display panel relative to the effective display range of the display panel is reduced.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 81 shows a rear view of a state in which a carrier tape is connected to a liquid crystal display panel.

The liquid crystal display panel l has a pair of upper and lower glass substrates 11 and 12.
A liquid crystal is sealed between the opposing surfaces of the glass substrates 11 and 12, and connection terminals 2 are provided at the ends of the upper glass substrate 1.1 and the lower glass substrate 12. and,
The connection terminals between the lower glass substrate 12 and the upper glass substrate are arranged in a direction perpendicular to the connection direction.

The carrier tapes 4 and 5 are generally made of a rectangular resin film, on which a wiring pattern made of metal foil is formed, and a device hole formed in the center of the carrier tape is provided with a protruding finger lead. At one end of the carrier tape 4.5, an input terminal 4 extending to the wiring pattern via an outer lead 44. .5, and an output terminal 42.52 extending to the wiring pattern via an outer lead 45.55 is provided at the other end. Furthermore, this carrier tape 4.5 is connected to the input terminal 7 outer lead 4.
By moving the 4.45 group to one side of the two corners on the input terminal 41.51 side, and cutting out the remaining corner where the outer lead does not pass through at approximately 45 degrees, this notch 43.53 allows for irregularities. It has a pentagonal shape.

Therefore, to explain the mounting of this carrier tape 4.5, as shown in FIG. 2, the liquid crystal display panel l is held on the surface of the holder 8, and the output terminals 42. Connected to connection terminal 2. In this way, the output terminal 42 at one end is connected to the liquid crystal display panel l.
．． 52 is connected to the carrier tape 4.5 by bending the output terminal outer lead 45.55 along the side surface of the holder 8, and connecting the input terminal 41.51 at the other end to a hard circuit placed on the back of the liquid crystal display panel l. Connected to the board 3.

In the connection structure of the liquid crystal display panel mounted in this way, a plurality of carrier tapes 4.5 are connected to one part of the liquid crystal display panel l.
In order to prevent the carrier tapes 4 and 5 from overlapping each other, conventionally, the carrier tapes 4 and 5 are connected to the connecting terminals 2 arranged on two sides in the orthogonal direction with the two corners in between. In order to eliminate overlap at the corners of the display panel, the display panel was designed to have a sufficient space to provide an empty area such as corner area B, but the carrier tape 4.5 covers one corner of the input terminal side. By forming an irregular pentagonal shape with a cutout, the carrier tape 4 is connected to the two orthogonal sides of the liquid crystal display panel using the cutout 43.53 minutes.
．． 5 can be approached from both sides toward their orthogonal corners. In other words, conventionally, the carrier tapes 4.5 mounted across the corners of the liquid crystal display panel are provided with sufficient margin to prevent the carrier tapes 4.5 from overlapping each other, and the empty corner area B is wide. However, by making the irregular pentagonal carrier tape 4.5, the notch 43.5
Even if the corner area B is narrowed by narrowing the corner area B, they will not overlap.Therefore, in order to prevent the carrier tapes 4.5 from overlapping each other when mounting the carrier tape 4.5 on the liquid crystal panel l,
This eliminates the need to take the necessary margin, and the external dimension A of the liquid crystal display panel 1 (see the broken line in Figure 1) is reduced by that amount, which reduces the effective display range of the liquid crystal display panel. Its external dimensions can be reduced compared to conventional ones.

Note that the connection structure of the front and display panels of the present invention can also be applied to the case where carrier tapes are connected to the three sides of the display panel. For the carrier tapes, only the ones on both sides sandwiching the corners have a notch in the corner on the side where both sides face each other, and the other carrier tapes do not need to have a notch, and one carrier tape is placed on each side. It can also be used when doing 6.

[Effects of the Invention] As described in detail above, according to the present invention, after connecting the carrier tape to the connection terminal on the liquid crystal display panel, the carrier tape is bent and placed on the back surface of the liquid crystal display panel. Since the carrier tape has a notch in one corner, there is no need to provide the necessary margin to prevent the carrier tapes from overlapping each other. Although the outer dimensions of the display panel were thick relative to the display range, the notch can now be reduced, allowing a more compact layout.

[Brief explanation of drawings]

Fig. 1 is a rear view of a display panel mounted with a carrier tape showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the main part structure showing its mounting structure, and Fig. 3 is a rear view of a display panel mounted with a conventional carrier tape. It is. 1...Display panel, 2...Connection terminal,
3...Circuit board, 4.5.6...-Carrier tape, 7...Semiconductor chip for drive circuit. Figure ■ Figure Figure

Claims (1)

[Claims] a display panel in which connection terminals are arranged on each side in a direction orthogonal to each other with at least one corner in between; a plurality of carrier tapes that are connected to the connection terminals, bent toward the back of the display panel, and connected to a circuit board; In a display panel connection structure comprising a drive circuit semiconductor chip bonded to the carrier tape, at least the carrier tapes on both sides adjacent to the corners of the display panel are arranged on each side of the display panel. A connection structure for a display panel, characterized in that each carrier tape is cut diagonally from the side facing the corner to the side facing the circuit board.