JP5199699B2 - Transmission type liquid crystal display device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a transmissive liquid crystal display device and a method for manufacturing the same.

  A transmission type liquid crystal panel using an SOS substrate on one side and a transparent substrate on the other side has been developed. It has been developed mainly as an engine used for liquid crystal projectors. (See Patent Document 1)

  4A and 4B show a transmissive liquid crystal display device according to the prior art, in which FIG. 4A is a front view, FIG. 4B is a side view, and FIG.

  The transmissive liquid crystal panel includes an SOS substrate 1 and a transparent substrate 2, and a pixel electrode, a TFT for driving a pixel, other circuit elements and wiring are formed on a silicon thin film formed on the SOS substrate. In addition, although there are components necessary for the transmissive liquid crystal panel, they are omitted here. Polarizing plates 3 and 4 are bonded to the surfaces of the SOS substrate 1 and the transparent substrate 2 so that the transmission axes are orthogonal to each other.

  In the FPC circuit board 6 and the reinforcing plate 5, openings 6A and 5A corresponding to the image display part S of the transmissive liquid crystal panel are formed and fixedly bonded. The openings 5A, 6A and the image display part S of the transmissive liquid crystal panel are aligned, and the outer periphery of the opening 6A of the FPC circuit board 6 and the outer periphery of the image display part S of the polarizing plate 3 are fixed with a double-sided adhesive. .

  The external connection terminal of the transmissive liquid crystal display panel and the FPC circuit board are electrically connected by the bonding wire 7 to complete the transmissive liquid crystal display device. If necessary, the bonding wire 7 is covered and protected with a resin or the like.

  In general, an SOS substrate is formed by epitaxially growing silicon on a sapphire substrate to form circuit elements, wiring, TFTs, etc. in several layers, but the current situation is that the yield is still poor. In addition, there are problems such as dust mixed when the SOS substrate and the transparent substrate are pasted together and voids mixed when the liquid crystal is injected, and the completed transmissive liquid crystal display panel has a worse yield. In particular, the electrical characteristics of the transmissive liquid crystal display panel must be inspected, and small dust and voids cannot be distinguished from each other unless enlarged and projected.

  Therefore, it is attached to a circuit board in which an opening corresponding to the image display part of the transmissive liquid crystal panel is formed, and after electrically connecting the transmissive liquid crystal panel and the circuit board, between the polarizing plates arranged in crossed Nicols. A method of manufacturing a transmissive liquid crystal display device was considered in which the transmissive liquid crystal panel was placed and inspected, and only non-defective products were bonded to a polarizing plate on the SOS substrate and the transparent substrate.

  3A and 3B are diagrams for explaining a method of manufacturing a transmissive liquid crystal display device according to the prior art, in which FIG. 3A is a side view of a transmissive liquid crystal panel, FIG. 3B is a front view of an FPC circuit board, and FIG. Is a front view in which a transmissive liquid crystal display panel is mounted on an FPC circuit board and bonding wires are used, (D) is a side view of (C), (E) is an XX sectional view, and (F) is a polarizing plate attached. It is sectional drawing.

  The transmissive liquid crystal panel is composed of an SOS substrate 1 and a transparent substrate 2 (A), and openings 6A and 5A corresponding to the image display portions of the transmissive liquid crystal panel are formed in the FPC circuit board 6 and the reinforcing plate 5, respectively. It is bonded and fixed (B). The openings 5A and 6A and the image display part S of the transmissive liquid crystal panel are aligned so that the outer periphery of the opening 6A of the FPC circuit board 6 and the outer periphery of the image display part S of the SOS substrate 1 are fixed by a double-sided adhesive. The external connection terminal of the transmissive liquid crystal display panel and the terminal of the FPC circuit board 6 are electrically connected by the bonding wire 7, and the bonding wire 7 is covered and protected with a resin or the like if necessary (C), (D), (E ). Thereafter, the transmissive liquid crystal panel is placed between the polarizing plates arranged in crossed Nicols and inspected, and the polarizing plates 3 ′ and 4 are pasted on the SOS substrate 1 and the transparent substrate 2 only for non-defective products (F).

Japanese Patent Laid-Open No. 11-337919

  It is difficult to attach the polarizing plate 3 'to the image display portion of the SOS substrate 1 facing the openings (5A, 6A) formed in the FPC circuit board and the reinforcing plate. In particular, since the SOS substrate 1 and the polarizing plate 3 'are fixed with a double-sided adhesive tape (not shown), they cannot be aligned after being applied. Further, it is necessary to prevent air and dust from entering between the SOS substrate 1 and the polarizing plate 3 '. The work is performed with the polarizing plate sandwiched between tweezers, but the side face of the opening becomes a bank by the thickness, making the pasting work difficult.

A transmissive liquid crystal panel using a translucent substrate on one side and the other is pasted on a circuit board having an opening corresponding to the image display portion of the transmissive liquid crystal panel, and is attached to the surface of the translucent substrate on one and the other side. In the transmissive liquid crystal display device to which the polarizing plate is attached, an opening corresponding to the image display portion of the transmissive liquid crystal panel is formed on the surface of the circuit board opposite to the side to which the transmissive liquid crystal panel is attached. The reinforcing plate is affixed, and becomes deeper from the outer periphery to the inner periphery on at least a part of one side around the opening of the reinforcing plate and opposite to the side on which the transmissive liquid crystal panel is affixed A transmissive liquid crystal display device in which a notch groove is formed.

It said circuit board is a transmission type liquid crystal display device Ru F PC circuit board der.

A transmissive liquid crystal panel using a translucent substrate on one side and the other is pasted on a circuit board having an opening corresponding to the image display portion of the transmissive liquid crystal panel, and is attached to the surface of the translucent substrate on one and the other side. In the method of manufacturing a transmissive liquid crystal display device for attaching a polarizing plate,
Forming a notch in a part of one side around the opening of the circuit board in which the opening corresponding to the image display portion of the transmissive liquid crystal panel is formed; and opening corresponding to the image display portion of the transmissive liquid crystal panel And a step of attaching to a circuit board having a notch formed on a part of one side around the opening and the opening, a step of electrically connecting the transmissive liquid crystal panel and the circuit board, and a polarizing plate disposed in crossed Nicols wherein the step of transmission type liquid crystal panel arranged to test, the formed one and the other of the circuit board on the surface of the light transmitting substrate side to be attached to the circuit board of the light-transmitting substrate A method of manufacturing a transmissive liquid crystal display device including a step of attaching a polarizing plate through a notch .

  The circuit board is an FPC circuit board having a reinforcing plate in which an opening corresponding to an image display portion of a transmissive liquid crystal panel is formed, and a step of forming a notch in a part of one side around the opening of the reinforcing plate A transmissive liquid crystal display device comprising:

  By forming a notch in a part of one side around the opening of the circuit board or a part of one side around the opening of the reinforcing plate, the work for attaching the polarizing plate to the surface of the SOS board becomes easy.

  A transmissive liquid crystal panel using an SOS substrate on one side and a transparent substrate on the other is attached to an FPC circuit board having a reinforcing plate having an opening corresponding to the image display portion of the transmissive liquid crystal panel, and the SOS substrate and the transparent substrate In the transmissive liquid crystal display device in which a polarizing plate is attached to the surface, a transmissive liquid crystal display device in which a notch is formed on at least a part of one side around the opening of the circuit board.

  5A and 5B are views for explaining a method of manufacturing a transmissive liquid crystal display device according to the present invention. FIG. 5A is a side view of a transmissive liquid crystal panel, FIG. 5B is a front view of a circuit board, and FIG. Front view of a transmissive liquid crystal panel mounted on a circuit board and bonding wires, (D) is a side view of (C), (E) is a cross-sectional view taken along XX, and (F) is a cross-sectional view with a polarizing plate attached. is there.

  The transmissive liquid crystal panel is composed of an SOS substrate 1 and a transparent substrate 2 (A), and an opening 8A corresponding to the image display portion S of the transmissive liquid crystal panel is formed in the circuit board 8 and is bonded and fixed (B ). One side of the outer periphery of the opening 8A is cut away, and the circuit board 8 has a U shape. The opening 8A and the image display part S of the transmissive liquid crystal panel are aligned, and the outer peripheral part of the opening 8A of the circuit board 8 and the outer peripheral part of the image display part S of the SOS substrate 1 are fixed by a double-sided adhesive. The external connection terminal of the display panel and the terminal of the circuit board 8 are electrically connected by the bonding wire 7, and the bonding wire 7 is covered and protected with a resin or the like if necessary (C), (D), (E). Thereafter, the transmissive liquid crystal panel is placed between the polarizing plates arranged in crossed Nicols and inspected, and the polarizing plates 3 ′ and 4 are pasted on the SOS substrate 1 and the transparent substrate 2 only for non-defective products (F).

  Conventionally, the operation of attaching the polarizing plate 3 ′ to the image display portion S of the SOS substrate 1 facing the opening 8A formed in the circuit board 8 has been performed with the polarizing plate 3 ′ sandwiched between tweezers. Although the side surface of the portion 8A becomes a bank by the thickness, making the pasting work difficult, in the present invention, since one side around the opening 8A of the circuit board 8 is notched, the tweezers do not hit, and the SOS substrate 1 The work at the time of sticking polarizing plate 3 'on the surface becomes easy.

  1A and 1B are views for explaining a method of manufacturing a transmissive liquid crystal display device according to the present invention, in which FIG. 1A is a side view of a transmissive liquid crystal panel, FIG. 1B is a front view of an FPC circuit board, and FIG. Is a front view in which a transmissive liquid crystal panel is mounted on an FPC circuit board and bonding wires are used, (D) is a side view of (C), (E) is an XX cross-sectional view, and (F) is a cross-section with a polarizing plate attached. FIG.

  The transmissive liquid crystal panel is composed of an SOS substrate 1 and a transparent substrate 2 (A). Openings 6′A and 9A corresponding to the image display portion S of the transmissive liquid crystal panel are provided in the FPC circuit board 6 ′ and the reinforcing plate 9, respectively. Is formed and bonded and fixed (B). The openings 6'A and 9A are aligned with the image display S of the transmissive liquid crystal panel, and the outer periphery of the opening 6'A of the FPC circuit board 6 'and the outer periphery of the image display S of the SOS substrate 1 are bonded on both sides. The external connection terminal of the transmissive liquid crystal panel and the terminal of the FPC circuit board are electrically connected by the bonding wire 7, and the bonding wire 7 is covered and protected with resin or the like if necessary (C), (D) (E). Thereafter, the transmissive liquid crystal panel is placed between the polarizing plates arranged in crossed Nicols and inspected, and the polarizing plates 3 ′ and 4 are pasted on the SOS substrate 1 and the transparent substrate 2 only for non-defective products (F).

  Since the openings 6'A and 9A having cutout sides corresponding to the image display portions of the transmissive liquid crystal panel are formed in the FPC circuit board 6 'and the reinforcing plate 9, the same effects as in the first embodiment are obtained.

  FIG. 2 is a front view (A) of a modified example of the notch shape of the FPC board according to the present invention, a front view (B) of a modified example of the notch of the reinforcing plate, and a side cross-sectional view (C).

  The FPC circuit board 10 has a notch 10B formed in the opening 10A and a part of the upper side. The position of the notch 10B may be the left side or the right side of the opening 10A, but it is preferably formed on the upper side because the FPC circuit board can be made symmetrical. The reinforcing plate 11 has a notch groove 11B that deepens from the outer periphery toward the inner periphery in the opening 11A and part of the upper side. 11C is a sticking surface with the FPC circuit board. Even with such a shape, tweezers can be facilitated.

It is a figure for demonstrating the manufacturing method of the transmissive liquid crystal display device by this invention, Comprising: (A) is a side view of a transmissive liquid crystal panel, (B) is a front view of an FPC circuit board, (C) is an FPC circuit Front view of a transmissive liquid crystal display panel mounted on a substrate and bonding wires, (D) is a side view of (C), (E) is an XX cross-sectional view, and (F) is a cross-sectional view with a polarizing plate attached. The front view (A) of the modification of the notch shape of the FPC board by this invention, the front view (B) of the modification of the notch of a reinforcement board, and side XX sectional drawing (C) It is a figure for demonstrating the manufacturing method of the transmission type liquid crystal display device by a prior art, (A) is a side view of a transmission type liquid crystal panel, (B) is a front view of a FPC circuit board, (C) is a FPC circuit. Front view of a transmissive liquid crystal display panel mounted on a substrate and bonding wires, (D) is a side view of (C), (E) is an XX cross-sectional view, and (F) is a cross-sectional view with a polarizing plate attached. 1A is a front view, FIG. 1B is a side view, and FIG. 2C is a cross-sectional view taken along line XX. It is a figure for demonstrating the manufacturing method of the transmissive liquid crystal display device by this invention, (A) is a side view of a transmissive liquid crystal panel, (B) is a front view of a circuit board, (C) is a circuit board. Front view with a transmissive liquid crystal display panel and bonding wires, (D) is a side view of (C), (E) is an XX cross-sectional view, and (F) is a cross-sectional view with a polarizing plate attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 SOS substrate 2 Transparent substrate 3 Polarizing plate 3 'Polarizing plate 4 Polarizing plate 5 Reinforcing plate 5A Reinforcing plate opening 6 FPC circuit board 6A FPC circuit board opening 6' FPC circuit board 6'A FPC circuit board opening 7 Bonding wire 8 Circuit board 8A Circuit board opening 9 Reinforcement plate 9A Reinforcement plate opening 10 FPC circuit board 10A FPC circuit board opening 10B FPC circuit board notch 11 Reinforcement plate 11A Reinforcement plate opening 11B Reinforcement Plate groove (notch)
11C Sticking surface S of reinforcing plate Image display part

Claims (4)

A transmissive liquid crystal panel using a translucent substrate on one side and the other is pasted on a circuit board having an opening corresponding to the image display portion of the transmissive liquid crystal panel, and is attached to the surface of the translucent substrate on one and the other side. In a transmissive liquid crystal display device to which a polarizing plate is attached,
On the surface of the circuit board opposite to the side on which the transmission type liquid crystal panel is attached, a reinforcing plate having an opening corresponding to the image display part of the transmission type liquid crystal panel is attached,
A notch groove that is deeper from the outer periphery toward the inner periphery is formed on a surface that is at least a part of one side around the opening of the reinforcing plate and opposite to the side on which the transmissive liquid crystal panel is attached. A transmissive liquid crystal display device. Transmissive liquid crystal display device according to claim 1, wherein said circuit board is Ru F PC circuit board der. A transmissive liquid crystal panel using a translucent substrate on one side and the other is pasted on a circuit board having an opening corresponding to the image display portion of the transmissive liquid crystal panel, and is attached to the surface of the translucent substrate on one and the other side. In the method of manufacturing a transmissive liquid crystal display device for attaching a polarizing plate,
Forming a notch in a part of one side around the opening of the circuit board in which the opening corresponding to the image display portion of the transmissive liquid crystal panel is formed;
Attaching the transmissive liquid crystal panel to an opening corresponding to the image display unit and a circuit board having a notch formed on a part of one side around the opening; and
Electrically connecting the transmissive liquid crystal panel and the circuit board;
A step of arranging and inspecting the transmissive liquid crystal panel between polarizing plates arranged in crossed Nicols;
A step of attaching a polarizing plate to the surface of the light-transmitting substrate on one side of the one and the other light-transmitting substrates, which is attached to the circuit substrate, through the notches formed on the circuit substrate. A method for manufacturing a transmissive liquid crystal display device. The circuit board is an FPC circuit board having a reinforcing plate in which an opening corresponding to an image display portion of a transmissive liquid crystal panel is formed, and a step of forming a notch in a part of one side around the opening of the reinforcing plate The method of manufacturing a transmissive liquid crystal display device according to claim 3.

Images