JPH0519228A - Liquid crystal display device module - Google Patents

Abstract

PURPOSE:To exactly execute positioning without using a jig, and also, to execute the assembly in its positioned state by providing a positioning means to an electronic parts loading substrate and a front frame on a backlight main body. CONSTITUTION:In the liquid crystal display device module constituted by assembling successively a backlight main body 70, an electronic parts loading substrate 35 on which a liquid crystal display substrate 62 is loaded, and a front frame 41, a pin-like projecting body 44A is formed integrally in four corners of a frame-like body 42 for constituting the backlight main body 70. On the other hand, in four corners of the substrate 35 in which the liquid crystal display substrate 62 is fitted, a pin insertion hole 35A is formed. In such a state, by placing the substrate 35 so that the pin-like projecting body 44A is inserted into the insertion hole 35A, the substrate 35 is positioned exactly to the backlight main body 70 and assembled. In the same way, in the front frame 41, as well, a pin insertion hole 41A is formed in its four corners, and it is positioned and assembled in the same way.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device module, and more particularly to a liquid crystal display device module in which a backlight body, an electronic component mounting substrate on which a liquid crystal display substrate is mounted, and a front frame are sequentially assembled.

[0002]

2. Description of the Related Art A liquid crystal display device module is roughly divided into a backlight main body which also serves as a back frame,
Some of them include an electronic component mounting board on which a liquid crystal display board is mounted and a front frame.

A window portion exposing the display surface of the liquid crystal display substrate is provided on the front frame, and the illumination area of the backlight body must be brought into contact with a predetermined area on the back surface of the liquid crystal substrate. Since they must be placed, their positioning during assembly becomes an important issue.

Conventionally, each of the backlight body, the electronic component mounting board on which the liquid crystal display board is mounted, and the front frame has pin insertion holes formed in the four corners thereof.

Then, as another object, there is a jig having four pins planted at positions corresponding to the pin insertion holes formed in the backlight body or the like, and each pin of the next tool is The backlight main body, the electronic component mounting board on which the liquid crystal display board is mounted, and the front frame are sequentially stacked so as to be inserted into the pin insertion holes and positioned.

Incidentally, as this type of liquid crystal display device, Applied Physics Letter 45, No. 10, 1021, 1984 (App.
lied Physics Letter, TJSheffer, J.Nehring: "A new, h
ighly multiplexable liquid crystal disply ".

[0007]

However, in the positioning having the conventional structure, it is necessary to invert the jig together with the other members in the assembly after the positioning is performed. The assembly work was inevitably complicated.

Therefore, the present invention has been made under such circumstances, and the object of the present invention is that accurate positioning can be performed without using a jig, and in that positioning state. An object of the present invention is to provide a liquid crystal display device module that can be assembled.

[0009]

In order to achieve such an object, the present invention provides a liquid crystal display device module in which a backlight body, an electronic component mounting substrate on which a liquid crystal display substrate is mounted, and a front frame are sequentially assembled. The backlight body is provided with positioning means for the electronic component mounting board and the front frame.

[0010]

In the liquid crystal display device module thus constructed, the backlight body itself is provided with the positioning means.

Therefore, the electronic component mounting board and the front frame can be positioned by sequentially stacking them on the backlight body as a base.

Therefore, unlike the conventional case, no jig is required, and only the backlight body, the electronic component mounting board on which the liquid crystal display board is mounted, and the front frame are used. However, it does not make you feel complicated.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a liquid crystal display substrate 6 to which the present invention is applied.
2 shows the alignment direction of liquid crystal molecules (for example, the rubbing direction), the twist direction of the liquid crystal molecules, the polarization axis (or absorption axis) direction of the polarizing plate, and the optical axis direction of the member that causes the birefringence effect when 2 is viewed from above. 2 shows a perspective view of a main part of the liquid crystal display substrate 62.

The twist direction 10 of the liquid crystal molecules and the twist angle θ
Is the rubbing direction 6 of the alignment film 21 on the upper electrode substrate 11, the rubbing direction 7 of the alignment film 22 on the lower electrode substrate 12, and the nematic liquid crystal layer 50 sandwiched between the upper electrode substrate 11 and the lower electrode substrate 12. It is defined by the type and amount of the optically active substance added.

In FIG. 2, in order to align the liquid crystal molecules between the upper and lower electrode substrates 11 and 12 sandwiching the liquid crystal layer 50 so as to form a twisted spiral structure, the upper and lower electrode substrates 11 and 12 are arranged. A so-called rubbing method, which is a method of rubbing the surfaces of the alignment films 21 and 22 made of an organic polymer resin made of polyimide, for example, in contact with the liquid crystal 12 in one direction with a cloth, for example, is adopted. The rubbing direction at this time, that is, the rubbing direction, the rubbing direction on the upper electrode substrate 11 and the rubbing direction 7 on the lower electrode substrate 12 are the alignment directions of the liquid crystal molecules. The two upper and lower electrode substrates 11 and 12 thus oriented are opposed to each other with a gap d ₁ so that the rubbing directions 6 and 7 intersect with each other at about 180 ° to 360 °. The electrode substrates 11 and 12 are adhered to each other with a frame-shaped sealant 52 having a cutout 51 for injecting liquid crystal, and the gap has positive dielectric anisotropy, and a predetermined amount of an optically active substance is added. When the nematic liquid crystal is sealed, the liquid crystal molecules are arranged in a helical structure with the twist angle θ in the figure between the electrode substrates. In addition, 31 and 32 are upper and lower electrodes, respectively. A member (hereinafter referred to as a birefringent member) 40 for providing a birefringence effect on the upper electrode substrate 11 of the liquid crystal cell 60 thus configured.
Are provided, and upper and lower polarizing plates 15 and 16 are provided with the member 40 and the liquid crystal cell 60 interposed therebetween.

The twist angle θ of the liquid crystal molecules in the liquid crystal 50 is preferably 200 to 300 degrees, but avoids the phenomenon that the lighting state near the threshold value of the transmittance-applied voltage curve is the orientation that scatters light. From the practical viewpoint of maintaining excellent time division characteristics, the range of 230 ° to 270 ° is more preferable. This condition basically makes the response of the liquid crystal molecules to the voltage more sensitive and acts to realize excellent time division characteristics. The refractive index anisotropy [Delta] n ₁ and the product [Delta] n ₁ · d ₁ is preferably from 0.5 to 1.0 its thickness d ₁ of the liquid crystal layer 50 in order to obtain excellent display quality, and more preferably 0. It is desirable to set it in the range of 6 to 0.9.

The birefringent member 40 acts so as to modulate the polarization state of light passing through the liquid crystal cell 60, and converts what could be colored display by the liquid crystal cell 60 alone into black and white display. Thus the birefringent member 40 refractive index anisotropy [Delta] n ₂ and a thickness d product [Delta] n ₂ · d ₂ of ₂ extremely important, preferably from 0.4 0.8, more preferably 0.5 Set to the range from 0.7 to 0.7.

Further, since the liquid crystal display substrate 62 according to the present invention utilizes the elliptically polarized light due to the birefringence, the polarizing plate 15,
When the uniaxial transparent birefringent plate is used as the birefringent member 40, the relationship between the 16 axes and the liquid crystal alignment directions 6 and 7 of the electrode substrates 11 and 12 of the liquid crystal cell 60 is extremely important. ..

The effects of the above relationship will be described with reference to FIG. FIG. 1 shows the axis of a polarizing plate, the optical axis of a uniaxial transparent birefringent member when the liquid crystal display substrate having the configuration of FIG. 2 is viewed from above,
4 shows a relationship between liquid crystal alignment directions of an electrode substrate of a liquid crystal cell.

In FIG. 2, 5 is the optical axis of the uniaxial transparent birefringent member 40, 6 is the liquid crystal alignment direction of the birefringent member 40 and the upper electrode substrate 11 adjacent thereto, and 7 is the liquid crystal alignment of the lower electrode substrate 12. Direction, 8 is the absorption axis or polarization axis of the upper polarizer 15, and 9 is the absorption axis or polarization axis of the lower polarizer 16.
The angle α is an angle formed by the liquid crystal alignment direction 6 of the upper electrode substrate 11 and the optical axis 5 of the uniaxial birefringent member 40, and the angle β is the uniaxial transparent birefringence with the absorption axis or the polarization axis 8 of the upper polarizing plate 15. The angle between the optical axis 5 of the member 40 and the angle γ is the lower polarizing plate 1
6 is the angle between the absorption axis or polarization axis 9 of 6 and the liquid crystal alignment direction 7 of the lower electrode substrate 12.

Here, how to measure the angles α, β and γ in the present specification will be defined. In FIG. 6, the intersection angle between the optical axis 5 of the birefringent member 40 and the liquid crystal alignment direction 6 of the upper electrode substrate will be described as an example. The intersection angle between the optical axis 5 and the liquid crystal alignment direction 6 is shown in FIG.
As shown in FIG. ₂ , it can be represented by φ ₁ and φ _2. However, in this specification, the smaller angle of φ ₁ and φ ₂ is adopted. That is, since φ ₁ <φ ₂ in FIG. 6A, φ ₁ is the intersection angle α between the optical axis 5 and the liquid crystal alignment direction 6,
Since φ ₁ > φ ₂ in FIG. 6B, φ ₂ is defined as an intersection angle α between the optical axis 5 and the liquid crystal alignment direction 6. Of course, either one may be adopted when φ ₁ = φ ₂ .

In the liquid crystal display substrate to which the present invention is applied, the angles α, β and γ are extremely important.

The angle α is preferably 50 to 90 degrees, more preferably 70 to 90 degrees, the angle β is preferably 20 to 70 degrees, more preferably 30 to 60 degrees, and the angle γ is preferably. It is desirable to set each to 0 to 70 degrees, and more preferably to 0 to 50 degrees.

If the twist angle θ of the liquid crystal layer 50 of the liquid crystal cell 60 is in the range of 180 degrees to 360 degrees, the above angle is satisfied regardless of whether the twist direction 10 is clockwise or counterclockwise. It suffices that α, β and γ be within the above range.

In FIG. 2, the birefringent member 40 is arranged between the upper polarizing plate 15 and the upper electrode substrate 11, but instead of this position, the lower electrode substrate 12 and the lower polarizing plate 16 are provided.
It may be arranged between and. This case corresponds to the case where the entire configuration of FIG. 2 is inverted.

(Embodiment 1) The basic structure is the same as that shown in FIGS. In FIG. 3, the twist angle θ of the liquid crystal molecules is 240 degrees, and the uniaxial transparent birefringent member 40 is used.
A liquid crystal cell having a parallel orientation (homogeneous orientation), that is, having a twist angle of 0 degree was used as a. Here, the ratio d / p of the thickness d (μm) of the liquid crystal layer and the helical pitch p (μm) of the liquid crystal material added with the optical rotatory substance was set to 0.50 to 0.55. The alignment films 21 and 22 were formed of a polyimide resin film and used after being rubbed. The tilt angle (pretilt angle) at which the alignment film subjected to the rubbing process causes the liquid crystal molecules in contact with the alignment film to be tilted with respect to the substrate surface is 3.0 to
It is 4.0 degrees. Δn of the uniaxial transparent birefringent member 40
₂ · d ₂ is about 0.6. On the other hand, Δn ₁ · d ₁ of the liquid crystal layer 50 having a structure in which the liquid crystal molecules are twisted by 240 degrees is about 0.8.

At this time, by setting the angle α to about 90 degrees, the angle β to about 30 degrees, and the angle γ to about 30 degrees, the voltage applied to the liquid crystal layer 50 via the upper and lower electrodes 31 and 32 is increased. When the voltage is below the threshold, light non-transmission, that is, black, and when the voltage exceeds a certain threshold, light transmission, that is, white and black display is realized. In addition, the axis of the lower polarizing plate 16 is 50
When rotated by 90 degrees from white, white display was realized when the voltage applied to the liquid crystal layer 50 was below the threshold, and black when the voltage was above the threshold, which was the reverse of the above.

FIG. 4 shows a change in contrast during time-division driving at 1/200 duty when the angle α is changed in the configuration of FIG. Although the contrast was extremely high in the vicinity of the angle α of 90 °, it decreased as the angle deviated. Moreover, when the angle α is small, both the lighting part and the non-lighting part are bluish, and when the angle α is large, the non-lighting part is purple and the lighting part is yellow, and in any case black and white display is impossible. Similar results are obtained for the angle β and the angle γ, but in the case of the angle γ, as described above, when the image is rotated from 50 degrees to 90 degrees, the black and white display is reversed.

(Second Embodiment) The basic structure is similar to that of the first embodiment. However, the twist angle of the liquid crystal molecules of the liquid crystal layer 50 is 26.
The difference is that 0 ° and Δn ₁ · d ₁ are about 0.65 to 0.75. The Δn ₂ · d ₂ of the parallel alignment liquid crystal layer used as the uniaxial transparent birefringent member 40 is about 0.58, which is the same as in Example 1. The ratio of the thickness d ₁ (μm) of the liquid crystal layer to the helical pitch p (μm) of the nematic liquid crystal material added with the optical rotatory substance was set to d / p = 0.55 to 0.60.

At this time, by setting the angle α to about 100 degrees, the angle β to about 35 degrees, and the angle γ to about 15 degrees, the monochrome display similar to that of the first embodiment can be realized. It is also similar to the first embodiment in that the reverse black and white display is possible by rotating the position of the axis of the lower polarizing plate from the above value by 50 to 90 degrees. The tendency for the deviations of the angles α, β, γ is almost the same as that of the first embodiment.

In each of the above embodiments, a parallel alignment liquid crystal cell having no twist of liquid crystal molecules is used as the uniaxial transparent birefringent member 40, but rather a liquid crystal layer in which liquid crystal molecules are twisted by about 20 to 60 degrees is used. There is less color change depending on the angle. Like the above-mentioned liquid crystal layer 50, this twisted liquid crystal layer is formed by sandwiching a liquid crystal between a pair of transparent substrates that have been subjected to the alignment treatment so that the alignment treatment directions intersect a predetermined twist angle. It In this case, the bisected direction of the two orientation treatment directions sandwiching the twisted structure of the liquid crystal molecules may be treated as the optical axis of the birefringent member. A transparent polymer film may be used as the birefringent member 40 (uniaxially stretched film is preferable at this time). In this case, as the polymer film, PET (polyethylene terephthalate), acrylic resin film, and polycarbonate are effective.

Further, although the single birefringent member is used in the above embodiments, in addition to the birefringent member 40 in FIG. 2, another birefringent member is provided between the lower electrode substrate 12 and the lower polarizing plate 16. It is also possible to insert a bending member. In this case, Δn ₂ · d ₂ of these birefringent members should be readjusted.

(Third Embodiment) The basic structure is the same as that of the first embodiment. However, as shown in FIG. 7, red,
By providing the green and blue color filters 33R, 33G, 33B and the light shielding film 33D between the filters, multicolor display is possible.

In FIG. 7, each filter 33
A smoothing layer 23 made of an insulating material is formed on the R, 33G, 33B, and the light shielding film 33D to reduce the influence of these irregularities, and an upper electrode 31 and an alignment film 21 are formed thereon.

(Embodiment 4) A liquid crystal display substrate 62 according to Embodiment 3, a drive circuit for driving the liquid crystal display substrate 62, and a liquid crystal display module 63 in which a light source is integrated compactly are shown.

FIG. 8 shows an exploded perspective view thereof.
The IC 34 that drives the liquid crystal display substrate 62 is mounted on a frame-shaped printed circuit board 35 that has a window for fitting the liquid crystal display substrate 62 in the center. The printed circuit board 35 in which the liquid crystal display substrate 62 is fitted is fitted in the window portion of the frame-shaped body 42 formed by plastic molding, the metal frame 41 is superposed on this, and the claws 43 are formed on the frame-shaped body 42. The frame 41 is fixed to the frame-like body 42 by bending it into the notch 44.

A cold cathode fluorescent lamp 36 arranged at the upper and lower ends of the liquid crystal display substrate 62, a light guide 37 made of an acrylic plate for uniformly irradiating the liquid crystal display cell 60 with light from the cold cathode fluorescent lamp 36, A reflecting plate 38 formed by applying white paint to a metal plate and a milky white diffusing plate 39 for diffusing light from the light guide 37 are fitted into the window portion from the back side of the frame-shaped body 42 in the order of FIG. Be done. An inverter power supply circuit (not shown) for lighting the cold cathode fluorescent lamp 36 is provided with a recess (not shown) provided on the back side of the right side of the frame-shaped body 42. The recess 45 of the reflector 38 is provided.
It is in a position opposite to. ). Diffusion plate 39,
The light guide 37, the cold cathode fluorescent lamp 36, and the reflector 38 are fixed by bending a tongue piece 46 provided on the reflector 38 into a small opening 47 provided on the frame-shaped body 42.

Here, the printed board 35 in which the liquid crystal display board 62 is fitted in the above-mentioned structure will be described in detail.

FIG. 9 (a) is a plan view,
(B) has shown sectional drawing in the bb line | wire of (a).

In the figure, the printed circuit board 35 is provided with a notch portion cut out along a notch line 35C in the figure, and has a substantially U-shape.

The liquid crystal display substrate 62 is arranged so as to be positioned in the cutout portion. In this embodiment, the upper and lower edges of the liquid crystal display substrate 62 are the printed circuit board 35.
It is arranged so as to be superimposed on top.

From this, the upper and lower edges of the printed board 62 on the side of the cutout portion are extended to the side of the liquid crystal display board 62 and overlap with the liquid crystal display board 62 (FIG. 9).
(Indicated by the symbol Q in (b)).

According to such an embodiment, the side of the printed board 35 on the side of the cutout portion is provided with the region Q which extends toward the liquid crystal display substrate 62 side and overlaps with the liquid crystal display substrate 62. ing.

For this reason, the area of the printed circuit board 35 is increased by the amount overlapped with the liquid crystal display circuit board 62, so that the width of the printed circuit board 35 from the outer periphery of the liquid crystal display circuit board 62 to the outer side (symbol P in the figure). (Indicated by) can be reduced.

Therefore, if the width P of the circuit board can be reduced, the width of the frame 41 covering this portion can also be reduced. FIG. 11 shows a cross-sectional view of a state in which the frame 41 is incorporated, and the width W of a portion usually called a frame can be reduced.

As a result, the width W of the frame 41 can be reduced while a sufficient wiring layer can be formed on the printed board 35.

Even if the printed circuit board 35 is extended so as to overlap with the liquid crystal display substrate 62, the overlapping region Q is the back surface of the electrode formation region of the liquid crystal display substrate 62. It can be formed without reaching the display area, and does not adversely affect the display.

Next, the structure relating to the connection between the electrodes of the driving IC 34 and the electrodes of the printed board 35 will be described with reference to FIG.
Will be described in detail.

In the figure, first, there is the driving IC 34. This driving IC is a circuit board formed by a so-called tape carrier method, and its insulating substrate is a film-shaped resin substrate 80. An IC 81 is so-called face down bonded on the upper surface of the film-shaped resin substrate 80. The electrodes (not shown) of the IC 81 are taken out to the respective leads via the wiring layer 82 formed on the back surface of the film-shaped resin substrate 80.

Of these leads, the lead on the printed circuit board 35 side is called an outer lead 83, and is formed so as to project from the end side of the film-shaped resin substrate 80 and extend.

On the other hand, on the printed circuit board 35, an electrode group including each electrode 34 is formed so as to be connected to the outer lead 83 of the driving IC 34. The printed circuit board 35 is covered with a solder resist film 85 which exposes the electrode group as a unit and covers the other region (wiring layer formation region).

In some cases, among the electrodes forming the electrode group, adjacent electrodes need to be connected to each other. In this embodiment, in particular, in such a case, the wiring layers under the solder resist film 85 are connected (indicated by reference numeral 85A in the drawing).

The printed circuit board 35 having such a structure.
According to the method, the electrodes 84 adjacent to each other are connected between the wirings under the solder resist film 85.

For this reason, the electrodes of the electrode group exposed from the solder resist film 85 have the same pattern in each case, and there is no pattern having a different pattern.

Therefore, since the solder adhesion conditions are the same in the connection with the outer leads 83 of the driving IC 34, the solder is evenly adhered to the respective electrodes,
There is no place where the amount of attached solder decreases.

Further, since each electrode 84 of the electrode group exposed from the solder resist film 85 is formed independently in a pattern, even if the solder bridge is visually inspected, it is erroneously recognized. There is no such thing as.

Therefore, from the above, the solder connection with the outer lead 83 of the driving IC 34 can be performed with high reliability.

Although not shown, the driving IC 3
4 lead on the side of the liquid crystal display substrate 62 (inner lead 86
Is referred to as) is connected to the electrode of the liquid crystal display substrate 62 with an anisotropic conductive connector film interposed, for example.

Further, in the above-mentioned structure, the frame-shaped body 4
2, a diffusion plate 39, a light guide 37 and a reflection plate 38 assembled (hereinafter referred to as a backlight body 70), a printed circuit board 35 in which a liquid crystal display substrate 62 is fitted, and a frame 41 which is a front frame. A method of assembling while positioning with high accuracy will be described in detail.

In FIG. 8, pin-shaped projections 44A are planted at the four corners of the frame-shaped body 42 constituting the backlight body 70. The pin-shaped projection 44A is formed integrally with the frame 42, for example.

On the other hand, pin insertion holes 35A are formed at the four corners of the printed board 35 into which the liquid crystal display board 62 is fitted.

The pin-shaped projection 44A and the pin insertion hole 35
By A, by arranging the printed board 35 so that the pin-shaped protrusion 44A is inserted into the pin insertion hole 35A,
The positional relationship is such that the printed circuit board 35 is accurately positioned with respect to the backlight body 70.

Then, similarly, in the frame 41,
Pin insertion holes 41A are formed at the four corners.

In the liquid crystal display module thus constructed, the backlight body 70 itself is provided with the positioning means.

Therefore, positioning can be performed only by sequentially stacking the printed circuit board 35 and the frame 41 on the basis of the backlight main body 70.

Therefore, unlike the conventional case, no jig is required, and the backlight main body 70 and the printed circuit board 3 are not required.
5. Since it is only the frame 41, it does not feel complicated even if it is turned upside down when it is assembled.

(Embodiment 5) The liquid crystal display module 63 according to Embodiment 4 is used in the display portion of a laptop personal computer.

FIG. 12 is a block diagram thereof, and FIG. 13 is a diagram of the laptop personal computer 64 mounted.
The result calculated by the microprocessor 49 is used to drive the liquid crystal display module by the driving IC 34 via the control LSI 48.

(Embodiment 6) In the embodiment shown in FIG. 9, the upper and lower sides of the cutout portion side of the printed circuit board 35 are uniformly extended to the liquid crystal display substrate 62 side. However, the configuration is not necessarily limited to this. For example, as shown in FIG. 14, a driving IC among the above-mentioned sides
You may make it extend the printed circuit board 35 of the part directly under the location where 34 is arrange | positioned. Even in this case, a sufficient area can be secured on the printed board 35.

(Embodiment 7) In the embodiment shown in FIG. 8, the backlight main body 70 is provided with a pin-shaped projection 44A. However, the configuration is not necessarily limited to this. For example, as shown in FIG. 15, pin-shaped projections 35B are formed on the printed circuit board 35 so as to project on both the front surface and the back surface, and the pin insertion hole 44B is provided on the backlight body 70 side and the pin 41 is provided on the frame 41 side. Of course, the insertion hole 41B may be provided.

Even in such a case, it can be said that the backlight body 70 is provided with the positioning means for the printed circuit board 35 and the frame 41.

(Embodiment 8) In the printed circuit board, the technique of connecting adjacent electrodes to each other between the wirings under the solder resist film is as shown in FIG. 35 is described as an example, but the present invention is not limited to this.
FIG. 16 shows a commonly used printed circuit board 90, and the reference numeral 91 indicates the connection point between the wirings under the solder resist film.

[0074]

As is clear from the above description,
According to the liquid crystal display device module of the present invention, accurate positioning can be performed without using a jig, and further, the assembly can be performed in the position.

[Brief description of drawings]

FIG. 1 is an alignment direction of liquid crystal molecules, a twisting direction of liquid crystal molecules in a first embodiment of a liquid crystal display substrate to which the present invention is applied.
It is explanatory drawing which showed the direction of the axis | shaft of a polarizing plate, and the relationship of the optical axis of a birefringent member.

FIG. 2 is an exploded perspective view of essential parts of a first embodiment of a liquid crystal display substrate to which the present invention is applied.

FIG. 3 is an explanatory diagram showing a relationship among a twist direction of liquid crystal molecules, a direction of an axis of a deflecting plate, and an optical axis of a birefringent member in a second embodiment of a liquid crystal display substrate to which the present invention is applied.

FIG. 4 is a graph showing the contrast and transmitted light color-crossing angle α characteristics of the first embodiment of the liquid crystal display substrate to which the present invention is applied.

FIG. 5 is a view showing an arrangement direction of liquid crystal molecules and a twisting direction of liquid crystal molecules in a third embodiment of a liquid crystal display substrate to which the present invention is applied.
It is explanatory drawing which showed the direction of the axis | shaft of a deflection plate, and the relationship of the optical axis of a birefringent member.

FIG. 6 is a diagram for explaining how to measure intersection angles α, β, and γ.

FIG. 7 is a partially cutaway perspective view of an upper electrode substrate portion of an embodiment of a liquid crystal display substrate to which the present invention is applied.

FIG. 8 is an exploded perspective view of a liquid crystal display module to which the present invention is applied.

9A and 9B are configuration diagrams showing an embodiment of a printed circuit board to which the present invention is applied, in which FIG. 9A is a plan view and FIG. 9B is a sectional view.

FIG. 10 is a perspective configuration diagram showing an example of a connection state between electrodes of a driving IC and a printed circuit board to which the present invention is applied.

FIG. 11 is a cross-sectional view showing a state in which a frame is incorporated in a printed circuit board to which the present invention is applied.

FIG. 12 is a block diagram of an embodiment of a laptop computer to which the present invention is applied.

FIG. 13 is a perspective view of an embodiment of a laptop personal computer to which the present invention is applied.

FIG. 14 is a plan configuration diagram showing another embodiment of the printed circuit board.

FIG. 15 is a perspective exploded view showing another embodiment of the liquid crystal display module.

FIG. 16 is a plan configuration diagram showing a printed circuit board other than the printed circuit board used in the liquid crystal display module.

[Explanation of symbols]

5 ... Optical axis of uniaxial transparent birefringent member, 6 ... Liquid crystal alignment direction of upper electrode substrate, 7 ... Liquid crystal alignment direction of lower electrode substrate, 8 ... Polarization axis or absorption axis of upper polarizing plate, 9 ... Lower polarizing plate Polarization axis or absorption axis, 11 ... upper electrode substrate, 12 ... lower electrode substrate, 15 ...
Upper polarizing plate, 16 ... Lower polarizing plate, 23 ... Smoothing layer, 33R ... Red filter, 33G ... Green filter, 33B ... Blue filter,
34 ... Driving IC, 35A, 41A, 41B, 44B ...
Pin insertion holes, 35B, 44A ... Pin-shaped projections, 35C ...
Notch line, 40 ... Birefringent member, 60 ... Liquid crystal cell, 62 ...
Liquid crystal display substrate, 63 ... Liquid crystal display module, 64 ... Laptop personal computer, 70 ... Backlight main body, 85 ... Solder resist film.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takao Higashi 3300 Hayano, Mobara-shi, Chiba Hitachi Mobara Plant, Inc. (72) Inventor Takayuki Iura 3300 Hayano, Mobara-shi, Chiba Hitachi Mobara Plant, Ltd.

Claims (1)

Claims: 1. A liquid crystal display device module comprising a backlight body, an electronic component mounting substrate on which a liquid crystal display substrate is mounted, and a front frame, which are sequentially assembled. A liquid crystal display device module comprising positioning means for the front frame.