JPH1048599A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device with which the improvement in an assembling characteristic and the reduction of a production cost are possible. SOLUTION: A case part 38 of a holding frame 12 is connected by means of a thin hinge part 40 to a base part 36. The case part 38, the base part 36 and the hinge part 40 are integrally molded by synthetic resins. A liquid crystal cell 10 is held at its peripheral edge between the base part 36 and the case part 38 and is held by a holding frame 12. A driving circuit 20 is connected to the liquid crystal cell 10 and is arranged on the side edge on the side opposite to the hinge part 40 in the base part 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display device having a liquid crystal cell and a holding frame holding the liquid crystal cell.

[0002]

2. Description of the Related Art Display devices for personal computers,
A liquid crystal display device used for a liquid crystal television or the like generally includes a liquid crystal cell and a holding frame holding the liquid crystal cell.
The liquid crystal cell has a pair of glass substrates facing each other and a liquid crystal layer sealed between these glass substrates, and a liquid crystal driving circuit is connected to the liquid crystal cell.

Further, the holding frame is configured by combining a rectangular frame-shaped resin frame and a rectangular frame-shaped case made of metal. That is, the liquid crystal cell is held by covering the metal case from above with the peripheral portion of the liquid crystal cell placed on the resin frame, and sandwiching the liquid crystal cell peripheral portion between the resin frame and the metal case.

When assembling the liquid crystal display device having the above structure, the liquid crystal cell is placed at a predetermined position on a resin frame, and then, for example, a double-sided tape is used so that the liquid crystal cell does not come off or displace during operation. To temporarily fix the liquid crystal cell to the resin frame. In this state, after the connection of the liquid crystal drive circuit and the like are performed, the liquid crystal cell is sandwiched and fixed by covering the metal case with the resin frame.

[0005]

As described above, in the conventional liquid crystal display device, the liquid crystal cell is sandwiched and held between two independent resin frames and a metal case. Must be temporarily fixed to the resin frame, which increases the number of working steps and lowers the assemblability. Further, it is necessary to combine the independent resin frame, the liquid crystal cell, and the metal case after aligning them with each other, and this also causes a reduction in assemblability.

Further, when the holding frame is composed of two independent parts made of different materials, the number of parts increases, which leads to an increase in manufacturing cost. The present invention has been made in view of the above points, and an object of the present invention is to provide a liquid crystal display device capable of improving assemblability and reducing manufacturing costs.

[0007]

In order to achieve the above object, a liquid crystal display device according to a first aspect of the present invention is provided with a substantially rectangular liquid crystal cell and one side edge of the liquid crystal cell. A liquid crystal driving circuit, and a holding frame holding the liquid crystal cell, wherein the holding frame is provided with a rectangular frame-shaped base on which a peripheral portion of the liquid crystal cell is mounted, and a thin hinge portion. A rectangular frame-shaped case portion rotatably connected to the base portion and holding the peripheral portion of the liquid crystal cell between the base portion and the liquid crystal cell.

The base, the hinge, and the case are integrally formed of resin, and the hinge is provided on a side of the liquid crystal cell opposite to the liquid crystal drive circuit. It is characterized by being provided adjacently.

According to the liquid crystal display device of the present invention, the case portion is further provided with an engagement claw extending from a side edge facing the hinge portion and engaging with the base portion. ing.

[0010] According to the liquid crystal display device of the present invention according to claim 3, the engaging claw is provided in the first portion extending from the case portion.
And a second portion connected to the first portion via a thin bent portion. And the first
Is opposed to a side surface of the base portion, and the second portion is engaged with an engagement portion provided on a bottom surface of the base portion.

According to a fourth aspect of the present invention, in the liquid crystal display device, the liquid crystal driving circuit includes a flexible circuit board extending from the liquid crystal cell and folded back on the back side of the base portion; A printed circuit board connected to the substrate and facing the liquid crystal cell with the base portion interposed therebetween, wherein the flexible circuit board and the printed circuit board have a mounting surface facing the base portion side. It is characterized by having.

According to a fifth aspect of the present invention, one end of the flexible circuit board is connected to a mounting surface of the printed circuit board and is located between the printed circuit board and the base. It is characterized by doing.

According to the liquid crystal display device configured as described above, the base portion and the case portion of the holding frame are integrally formed of resin, and the case portion is rotatable with respect to the base portion by the hinge portion. It is connected to.
Therefore, at the time of assembly, the liquid crystal cell is arranged on the base portion with the case portion opened, and then the case portion is rotated around the hinge portion toward the base portion so that the periphery of the liquid crystal cell is connected to the base portion. It is sandwiched and fixed between the case part.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIGS. 1 to 3, the liquid crystal display device according to the present embodiment
The liquid crystal display device includes a liquid crystal cell 10 and a holding frame 12 that holds a peripheral portion of the liquid crystal cell.

The liquid crystal cell 10 includes a rectangular array substrate 14 and a rectangular counter substrate 16 which are disposed to face each other.
A liquid crystal layer (not shown) is sealed between the array substrate 14 and the counter substrate 16. Array substrate 1
A deflector 18 is attached to each of the outer surface 4 and the outer surface of the counter substrate 16.

A drive circuit 20 is connected to one longitudinal edge of the array substrate 14. The drive circuit 20
It has an elongated rectangular printed circuit board 22 located opposite one side edge of the array board 14, and this printed circuit board is provided via four tape carrier packages (hereinafter referred to as TCP) 24 as flexible circuit boards. And connected to one side edge of the array substrate 14. Note that signal lines and scanning lines (not shown) are formed in a matrix on the array substrate 14, and the drive circuit 20 is connected to the signal lines.

Each TCP 24 and printed circuit board 22
Has a mounting surface facing the holding frame 12 side, as will be described later.
C26 is mounted and the printed circuit board 2
A plurality of electronic components are also mounted on the mounting surface of No. 2.

Another driving circuit 34 having a TCP 32 on which a driving IC 30 is mounted is attached to one side edge of the array substrate 14 in the lateral direction. This drive circuit 34
Are connected to the scanning lines of the array substrate 14.

On the other hand, the holding frame 12 is
And a rectangular frame-shaped base portion 36 having a size slightly larger than the external size of the base portion 36 and a rectangular frame-shaped case portion 38 having an external size substantially equal to that of the base portion 36.

The base 36 and the case 38 are connected to each other at one side via a hinge 40. The hinge part 40 is formed to be thin and bendable. Accordingly, the case portion 38 pivots about the hinge portion 40 between an open position separated from the base portion 36 as shown in FIG. 1 and a holding position exactly overlapping the base 36 as shown in FIG. It is free.

A step portion 36a is formed on the upper surface of the base portion 36 along the periphery of the inner hole of the base portion 36.
6a functions as a supporting portion for supporting the peripheral portion of the liquid crystal cell 10. Further, the base portion 36 is formed so as to be entirely thicker than the case portion 38, and has a side surface and a bottom surface.

Engagement projections functioning as engagement portions are provided on both longitudinal ends of the side surface 42 of the frame portion facing the hinge portion 40, that is, the opposite side of the hinge portion. 44 are provided respectively.

The case 38 has a pair of engaging claws 46 which can be engaged with the engaging projections 44 of the base 36. That is, the engagement claws 46 are provided at both ends of the side edge of the case portion 38 opposite to the hinge portion 40. Each of the engagement claws 46 has an engagement hole 48 that can be engaged with the engagement protrusion 44 of the base portion 36. Therefore, the case portion 38 is rotated around the hinge portion 40 to the holding position, and each engaging claw 46 is
The case portion 38 is held at a holding position adjacent to and opposed to the base portion 36 by engaging with the corresponding engagement protrusions 44 of the first and second portions.

The holding frame 12 having the above-described structure is integrally formed of a synthetic resin.
Next, the above-described liquid crystal cell 10 and the holding frame 12 will be described.
The overall configuration of the liquid crystal display device having the above will be described together with its assembling method.

First, as shown in FIG.
With the second case part 38 opened, the peripheral part of the liquid crystal cell 10, particularly the peripheral part of the array substrate 14, is positioned and placed on the step part 36a on the upper surface of the base part 36. At this time, the liquid crystal cell 10 is arranged such that the side edge opposite to the side edge to which the driving section 20 is connected is adjacent to the hinge section 40, and the driving section 20 is connected to the hinge section 40 of the base section 36. It is arranged on the side surface 42 opposite to the side.

Subsequently, the case portion 38 is pivoted about the hinge portion 40 to the holding position, and the pair of engagement claws 46 are engaged with the corresponding engagement protrusions 44 of the base portion 36, thereby to make the case portion 38 Is held in the holding position. Thereby,
The periphery of the liquid crystal cell 10 is sandwiched between the base 36 and the case 38, and is fixed and held by the holding frame 12.

As shown in FIG. 4, each of the TCPs 24 of the drive unit 20 is provided with a side surface 42 and a bottom surface 43 of the base unit 36.
, And the printed circuit board 22 faces the bottom surface 43 of the base portion 36 in parallel. Here, TCP24
Mounting surface 24a and printed circuit board 22 mounting surface 2
2a is located on the base portion 36 side, and the drive IC 26 and the electronic component 50 mounted on these mounting surfaces are respectively disposed between the TCP and the base portion and between the printed circuit board and the base portion. I have.

Thereafter, the liquid crystal display device assembled as described above is mounted on a casing or a case (not shown) and connected to a power supply, a control unit, and the like, and the assembly is completed. According to the liquid crystal display device configured as described above, the holding frame 12 that holds the liquid crystal cell 10 includes the base portion,
Since the case portion and the hinge portion are integrally formed of synthetic resin, in the assembling process, after mounting the liquid crystal cell on the base portion, the simple operation of simply rotating the case portion to the holding position is performed. Liquid crystal cell holding frame 12
Can be fixedly held. Therefore, it is not necessary to temporarily fix the liquid crystal cell 10 to the base portion 36 with a double-sided tape or the like, and it is not necessary to align the case portion 38 with the base portion and the liquid crystal cell. Is greatly improved.

Further, the holding frame 12 is integrally molded.
Since it can be handled as a part, the manufacturing cost can be reduced by reducing the number of parts. The TCP 24 and the printed circuit board 26 of the drive circuit 20 are:
The mounting surface is located on the holding frame 12 side and is not exposed to the outside. Therefore, the driving circuit 20
Need not be covered by a shield plate, a shield case, or the like, and the entire device can be reduced in size and thickness.

The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the present invention. For example, in the above-described embodiment, each of the TCPs 24 of the drive circuit 20 has a configuration in which the conductive portion provided at one end thereof is connected to the back surface of the printed circuit board 22. However, as shown in FIG. May be connected to the mounting surface 22a side of the printed circuit board 22. In this case, the shielding properties are further improved. In FIG. 5, reference numeral 54 denotes a connector attached to the outer surface of the printed circuit board 22.

FIGS. 6 and 7 show the holding frame 1.
14 shows another embodiment of the engagement claw 46 provided on the second case portion 38. According to this embodiment, each engaging claw 46 includes a rectangular plate-shaped first portion 46a extending perpendicularly from one side edge of the case portion 38, and a rectangular plate-shaped second portion 46b. , And the first and second portions are connected via a thin bent portion 46c. And the second
Of the first portion 46 around the bent portion 46c.
a, and has an engagement hole 48.

On the other hand, in the base portion 36 of the holding frame 12, the engagement protrusions 44 that engage with the engagement claws 46 are provided on the bottom surface 43 of the frame portion of the base portion 36 opposite to the hinge portion 40. Have been.

In the above configuration, when the case portion 38 is rotated to the holding position and held by the pair of engagement claws 46, the first portion 46 a of each engagement claw 46 is attached to the side surface 42 of the base portion 36. Then, the second portion 46b is bent toward the rear surface 43 of the base portion at the position of the bent portion 46c, and the engagement hole 48 is engaged with the engagement protrusion 44. Thereby, the case part 38 is fixed to the holding position where the case part 38 is in close contact with the base part 36.

According to the other embodiment, the same operation and effect as those of the above-described embodiment can be obtained, and the case portion 38 is more securely held at the holding position by the pair of engaging claws 46. In addition, the peripheral portion of the liquid crystal cell 10 can be reliably supported by the holding frame 12.

[0035]

As described in detail above, according to the present invention, the base part and the case part of the holding frame are integrally formed of synthetic resin, so that the assembling property is high and the manufacturing cost is reduced. A possible liquid crystal display device can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2 is a perspective view of the liquid crystal display device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along the line BB in FIG. 2;

FIG. 5 is a sectional view of a liquid crystal display device according to another embodiment of the present invention.

FIG. 6 is a perspective view showing an engagement claw according to another embodiment of the present invention.

FIG. 7 is a sectional view of a liquid crystal display device provided with the engagement claws shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Liquid crystal cell 12 ... Holding frame 14 ... Array board 16 ... Opposite board 20, 34 ... Drive circuit 22 ... Printed circuit board 24 ... TCP 36 ... Base part 38 ... Case part 40 ... Hinge part 44 ... Engagement protrusion 46 ... Dovetails 46a: first portion 46b: paired portion 46c: bent portion 48: engagement hole

Claims (5)

[Claims] 1. A liquid crystal cell having a substantially rectangular shape, a liquid crystal driving circuit provided along one side edge of the liquid crystal cell, and a holding frame holding the liquid crystal cell. A rectangular frame-shaped base portion on which the peripheral portion of the liquid crystal cell is placed; and a rotatable connection to the base portion via a thin hinge portion, and a peripheral portion of the liquid crystal cell between the base portion and the base portion. A base portion, a hinge portion, and a case portion are integrally formed of resin, and the hinge portion is formed of a side edge of the liquid crystal cell. A liquid crystal display device provided adjacent to a side edge opposite to a drive circuit. 2. A liquid crystal cell having a substantially rectangular shape, a liquid crystal drive circuit provided along one side edge of the liquid crystal cell, and a holding frame holding the liquid crystal cell. A rectangular frame-shaped base portion on which the peripheral portion of the liquid crystal cell is mounted; and a thin hinge portion rotatably connected to one side edge of the base portion. The peripheral portion of the liquid crystal cell is connected to the base portion. And a case portion having a rectangular frame shape sandwiched between the base portion, the case portion having an engaging claw extending from a side edge facing the hinge portion and engaging with the base portion; The part, the hinge part, and the case part are integrally formed of resin, and the hinge part is provided adjacent to a side edge of the side of the liquid crystal cell opposite to the liquid crystal drive circuit. A liquid crystal display device characterized by the above-mentioned. 3. The engaging claw has a first portion extending from the case portion, and a second portion connected to the first portion via a thin bent portion, The first part is
3. The liquid crystal display device according to claim 2, wherein the second portion is engaged with an engagement portion provided on a bottom surface of the base portion, facing the side surface of the base portion. 4. 4. The liquid crystal drive circuit is connected to the flexible circuit board extending from the liquid crystal cell and folded back to the back side of the base section, and the base section is interposed between the flexible circuit board and the flexible circuit board. And a printed circuit board facing the liquid crystal cell with the flexible circuit board and the printed circuit board having a mounting surface facing the base portion side. 4. The liquid crystal display device according to any one of 3. 5. The flexible circuit board according to claim 4, wherein one end of the flexible circuit board is connected to a mounting surface of the printed circuit board and is located between the printed circuit board and the base. Liquid crystal display device.