JP2003121816A - Liquid crystal display module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystal display module which prevents the occurrence of shavings of a frame body or a rear plate made of resin which penetrate a back light unit. SOLUTION: A liquid crystal display panel is provided with a second frame internally provided with an illuminating means comprising a light transmitting plate, a linear light source, a reflection sheet when necessary, a diffusing sheet, and a lens sheet and a first frame to which a third frame covering the first frame except a part corresponding to a display area of a liquid crystal panel is fixed by a fixing means and which is freely inserted to and detached from the second frame, and the first frame is provided with notched parts to be fitted to the projection part of the light transmitting plate, the diffusing sheet, and lens sheet.

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 module, and in particular, in a backlight unit that illuminates a liquid crystal panel from the back side, it is possible to avoid the generation of foreign matter by rubbing the members forming the backlight unit against each other. However, the present invention relates to a liquid crystal display module having a backlight unit having a structure with improved quality and assembly workability.

[0002]

2. Description of the Related Art A liquid crystal display module includes a liquid crystal panel and
The backlight unit is arranged on the back surface of the liquid crystal panel, and a pair of frames sandwiching and supporting the liquid crystal panel and the pack light unit from both sides of the front surface of the liquid crystal panel and the back surface of the backlight unit.

FIG. 15 is a plan view of a conventional liquid crystal display module with a metal frame removed, and FIG. 16 is a sectional view taken along the line XV--XV in FIG. It is disclosed in JP-A-11-160681.

In FIGS. 15 and 16, reference numeral 1 denotes a liquid crystal panel, for example, an STN liquid crystal panel or a TFT liquid crystal panel suitable for a large screen which is a twist nematic liquid crystal display. Reference numeral 2 denotes a light guide plate disposed on the back surface of the liquid crystal panel 1, which is made of a transparent acrylic resin plate having a substantially flat plate shape. Three
Is a linear light source disposed on the side surface of the light guide plate 2, and 4 is an illuminating means. The light guide plate 2, the linear light source 3 and, if necessary, a reflection sheet, a diffusion sheet, a lens plate, etc. are laminated to efficiently emit light. The liquid crystal panel 1 is well spread uniformly over the surface and at least the effective display surface of the liquid crystal panel 1 is illuminated.

Reference numeral 5 denotes a resin frame for supporting the liquid crystal panel 1 and housing the illuminating means 4, 6 denotes a plurality of protrusions provided in the vicinity of three side surfaces of the frame 5, and 7 denotes one remaining side surface of the frame 5. A step portion 8 provided in the vicinity is a back plate that covers at least a part of the illumination means 4, and is made of a resin molded product having an L-shaped cross section. Reference numeral 9 denotes a claw that engages with the side surface of the frame body 5, and is provided at four locations along one side surface of the frame body 5 so as to project from the main surface of the back plate 8. Reference numeral 10 denotes a first key portion directed to the frame 5 at the tip of the claw 9, and reference numeral 11 denotes a second key portion directed to the outside at the substantially central portion of the claw 9.

Reference numeral 12 denotes a metal frame, which is a thin metal plate molded product that covers the periphery of the liquid crystal panel 1. Reference numeral 13 denotes a hanging portion, which is provided on all four circumferences of the metal frame 12. A plurality of through holes 14 are provided in the hanging portion 13, and a plurality of tongue pieces 15 are provided in the hanging portion 13 toward the inside of the through hole 14.

Next, a conventional method for engaging the liquid crystal panel and the illumination means will be described. The metal frame 12 has a large through hole in the center to expose at least the effective display surface of the liquid crystal panel 1, and the hanging portions 13 are provided on all four peripheries of the metal frame 12, whereby the liquid crystal panel 1 and the frame are formed. Body 5
Can be stored. The hanging portion 13 is provided with a plurality of engaging means composed of a through hole 14 and a tongue piece portion 15 that goes toward the inside of the through hole. The engaging means is provided near three side surfaces of the frame body 5 in three adjacent hanging portions 13. The projection 6 enters the through hole 14 and the lower part thereof is engaged with the tongue piece 15 by being locked. The remaining hanging part 13
In the above, the projection of the second key portion 11 which goes to the outside of the claw 9 enters the through hole 14 and engages with the lower portion thereof being locked by the tongue piece portion 15.

As described above, usually, the illumination means is assembled as one functional component before being incorporated in the liquid crystal display module, and the illumination means alone receives the handling such as transportation and transportation. For this reason, it is necessary to have a structure in which the illuminating means alone can withstand a certain degree of impact. Therefore, the illuminating means is sandwiched between the frame body and the back plate, and the frame body and the back plate are engaged by the claws.

[0009]

In the conventional liquid crystal display module, after the illumination means is engaged with the frame body and the back plate (hereinafter, referred to as a backlight unit), after being shipped from the backlight manufacturer to the market. The liquid crystal panel was completed by engaging the liquid crystal panel and the backlight unit at the shipping destination. Therefore, due to the vibration generated during transportation of the backlight unit, the frame body and the back plate rub against each other at the engaging portion between the frame body and the back plate, and a foreign matter is generated. When foreign matter adheres, there is a problem that a display defect is caused by the foreign matter.

Further, in a series of assembling procedures from the assembly of the backlight unit to the engagement of the liquid crystal panel and the backlight unit, the liquid crystal panel is provided on the front surface of the frame and the optical optical sheets and the light guide plate are provided on the back surface of the frame. , Because it will be placed
It is necessary to invert the frame body at least once, which causes a problem of increasing the assembly work time.

The present invention has been made in order to solve the above-mentioned problems, and liquid crystal capable of preventing the generation of shavings of a resin frame body or a back plate that enters the inside of a backlight unit. To get the display module. Further, since the frame body and the back plate of the backlight unit are not engaged with each other, it is possible to easily assemble each member, and to obtain a liquid crystal display module capable of improving assembly workability. Another object of the present invention is to obtain a liquid crystal display module that can shorten the assembly work time without inverting the frame during the liquid crystal display module assembly process.

[0012]

In a liquid crystal display device according to the present invention, a first frame having a through hole, a light guide plate, a linear light source, and optionally a reflection sheet, a diffusion sheet or a lens sheet are used. Except for a portion corresponding to the display area of the liquid crystal panel, the liquid crystal panel positioned on the first frame with the lighting means behind and the second frame having the lighting means inside. A liquid crystal display module comprising a third frame for covering, wherein the second frame and the third frame are fixed by a fixing means,
It is characterized in that the first frame and the second frame can be inserted and removed freely.

Further, the present invention is characterized in that the first frame is provided with a notch portion which fits into the projection portion of the light guide plate, the diffusion sheet and the lens sheet.

Further, the first frame is a resin-made mold frame.

Furthermore, the light guide plate, the diffusion sheet, and the cutout portion which fits into the projection portion of the lens sheet are provided in the second frame.

Further, the second frame is a resin-made mold frame.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a plan view of a liquid crystal panel in which a liquid crystal driving integrated circuit is mounted on the liquid crystal panel. In FIG. 1, reference numeral 1 denotes a liquid crystal panel, which is formed by enclosing two substrates with a predetermined gap therebetween, adhering the outer periphery of the display area with a sealant, and enclosing a liquid crystal.

In the liquid crystal panel 1, the array substrate and the counter substrate in which electrodes and wirings (not shown) such as color filters, transistors, pixel electrodes, etc. are formed on the upper or lower substrate are held at equal intervals. Spacer to do, 2
It is composed of a sealing material that bonds two substrates together, a sealing material that seals after injecting liquid crystal between the two substrates, an alignment film that gives the liquid crystal an initial alignment, and a polarizing plate that polarizes light. In the present invention, since the existing liquid crystal panel is used, the description thereof is omitted here.

Reference numeral 17 is a liquid crystal driving integrated circuit (hereinafter, referred to as liquid crystal driving IC), and 18 is a tape carrier package (hereinafter, referred to as TCP), which is electrically connected to the electrode terminal portion of the liquid crystal panel 1 and is connected to the liquid crystal. The driving IC 17 is mounted. 1
A printed circuit board (hereinafter referred to as PWB) 9 is connected to the input electrode terminal portions of the TCP 18 connected to the liquid crystal panel 1, and supplies an input signal to the TCP 18.

2 is a front view of the backlight unit according to Embodiment 1 of the present invention, FIG. 3 (a) is a sectional view taken along the line IIa-IIa of FIG. 2, and FIG. 3 (b) is FIG. 3 is a sectional view taken along the line IIb-IIb in FIG. 4 is shown in FIG.
5 is a rear view of the backlight unit of FIG. 4 with the second frame removed, and FIG.
5B is a sectional view taken along the line, and FIG.
It is sectional drawing seen from the b line.

2 to 5, reference numeral 2 denotes a light guide plate, which is a light guide plate upper surface 2a for collecting light condensed by a reflector described later.
Exit from. Reference numeral 3 denotes a linear light source which serves as a light source and is arranged in parallel on the incident surface 2b of the light guide plate 2. Reference numeral 20 denotes a reflector, which is arranged so as to focus the light from the linear light source 3 on the light guide plate incident surface 2b side. Reference numeral 21 denotes a reflection sheet, which is arranged on the lower surface or the side surface of the light guide plate 2 so that the light incident from the light guide plate incident surface 2b does not exit from the surfaces other than the light guide plate upper surface 2a. Reference numeral 22 is a lens sheet that efficiently guides the light guided by the light guide plate to the liquid crystal panel 1, and 23 is a diffusion sheet, which diffuses the light guided by the lens sheet 22 to the display area of the liquid crystal panel 1 without unevenness. Reference numeral 4 denotes an illuminating means, which includes a light guide plate 2, a linear light source 3, and a reflection sheet 21, a diffusion sheet 23, a lens sheet 22 and the like, which are laminated as necessary, to spread light efficiently and evenly in the plane, and at least the liquid crystal panel 1. Illuminate the display area.

The lens sheet 22 and the diffusion sheet 23 (hereinafter referred to as optical sheets 24) are not limited in the number of sheets and the stacking order as long as sufficient brightness can be obtained in the liquid crystal panel. is not.

Reference numeral 25 is a first frame, which has a through hole in the center for allowing light from a light source to enter at least the display surface of the liquid crystal panel 1. In the first embodiment, the mold frame is made of resin. . A positioning guide 25a is provided on the first frame 25 and positions the liquid crystal panel 1 on the upper surface of the first frame 25. Reference numeral 25b denotes a stepped portion provided on the first frame 25, which is provided inside the first frame 25 in order to regulate the movement of the lens sheet 22 and the diffusion sheet 23 in the horizontal direction. Reference numeral 25c denotes a notch portion, and at least one each is provided on at least two opposing inner surfaces of the first frame except the surface in the vicinity of the light guide plate entrance surface 2b when the light guide plate 2 is provided inside the first frame. Protrusions are provided on the light guide plate 2, the reflection sheet 21, the diffusion sheet 23, and the lens sheet 22 so as to fit into the cutout portions 25c.

Reference numeral 26 is a second frame, which is a rear frame made of aluminum in the first embodiment, and is a third frame which will be described later.
The tab 26a for fixing to the frame is provided. The light guide plate 2, the linear light source 3, the reflector 20, the reflection sheet 21, the lens sheet 22, the diffusion sheet 23, the first frame 25, the second frame 26 and the like constitute a backlight unit.

Although the first frame 25 is a resin frame in which the cutout portion 25c is easily manufactured,
The resin is not limited to the one provided that the cutout portion is provided.

The second frame 26 is made of aluminum for the purpose of heat dissipation, but the second frame 26 is not limited to aluminum.

FIG. 6 is a plan view of a liquid crystal display module in which the liquid crystal driving IC mounted liquid crystal panel of FIG. 1 and the backlight unit of FIG. 2 are incorporated, and FIG.
FIG. 7B is a sectional view taken along line VIa-VIa, and FIG. 7B is a sectional view taken along line VIb-VIb in FIG.

In FIGS. 6 and 7, reference numeral 27 denotes a third frame, which has a through hole at least in the center serving as the display surface of the liquid crystal panel 1, and which includes a backlight unit and a liquid crystal panel on which a liquid crystal driving IC is mounted. Hold it. 27a is a claw hole, which is provided in the third frame 27 so as to be engaged with the claw 26a of the second frame 26.

In the first embodiment, the fixing means of the second frame 26 and the third frame 27 is the claw 26.
Although it is hooked and fixed by “a”, the fixing strength can be increased by the screw and the working time can be shortened by the crimping or the adhesive tape. The fixing means is not limited to the fixing means by the claw 26a and the claw hole 27a.

Next, a method of assembling the backlight unit will be described. With the surface of the first frame 25 on which the positioning guide 25a is formed as the bottom surface, the stacked optical sheets 24 are inserted into the first frame 25, and the step portion 25 is formed.
Positioning is performed by b and the cutout portion 25c. next,
The light guide plate 2 is positioned by the cutout portion 25c of the first frame, and the reflection sheet 21 is placed on the light guide plate upper surface 2a of the light guide plate 2.
And the cutout portion 25c on the surface excluding the incident surface 2c.
Position with. Further, the reflector 20 provided around the linear light source 3 is fitted between the first frame 10 and the light guide plate 2. Next, the backlight unit is configured such that the inner wall of the second frame 26 and the outer wall of the first frame 25 are close to each other and can be inserted and removed freely.

Next, a method of assembling the liquid crystal display module will be described. The backlight unit is inverted and the liquid crystal panel 1 with the liquid crystal driving IC mounted thereon is arranged in alignment with the positioning guide 25a of the first frame 25.
Next, the third frame 27 is fitted from the liquid crystal panel 1 side, and the claws 26a of the second frame 26 and the claw holes 27a of the third frame 27 are engaged to complete the liquid crystal module.

In the first embodiment, it is difficult to ship the backlight unit as a single unit because the backlight unit can be inserted and removed freely. However, the backlight unit assembly process and the liquid crystal module assembly process are the same. By assembling on the line, it is possible to eliminate the drawbacks of the backlight unit that can be inserted and removed freely.

As described above, according to the liquid crystal display module of the first embodiment of the present invention, the backlight is arranged in a state where the inner wall of the second frame 26 and the outer wall of the first frame 25 are close to each other and can be inserted and removed. Since the unit is configured, that is, the first frame 25 and the second frame 26 are not fixed by the claws or the like, it is possible to prevent the generation of shavings in the fixed portion due to the vibration during the transportation of the manufacturing line, and shorten the assembly work time. It becomes possible to do.

Embodiment 2. 8 is a front view of a backlight unit according to a second embodiment of the present invention, and FIG.
8A is a cross-sectional view taken along the line VIIIa-VIIIa in FIG. 8, and FIG. 9B is a cross-sectional view taken along the line VIIIb-VIIIb in FIG. 10 is a rear view of the backlight unit of FIG. 8 with the first frame removed, FIG.
1 (a) is a sectional view taken along the line Xa-Xa in FIG.
11B is a sectional view taken along the line Xb-Xb in FIG. 12A is a side view of the first frame, and FIG. 12B is a rear view of the first frame. FIG.
FIG. 14 is a plan view of a liquid crystal display module in which the liquid crystal driving IC mounted liquid crystal panel of FIG. 1 and the backlight unit of FIG. 8 are incorporated, and FIG. 14A is an arrow XIIIa-XIII of FIG.
14B is a cross-sectional view seen from the line a, and FIG.
It is sectional drawing seen from the IIb-XIIIb line.

8 to 14, the same reference numerals as those in FIGS. 1 to 7 indicate the same or corresponding parts, and the description thereof will be omitted.
Reference numeral 28 denotes a first frame according to the second embodiment, which has a through hole in the center for allowing light from a light source to enter at least the display surface of the liquid crystal panel 1. In this embodiment, a resin molded frame is used. Is. A positioning guide 28 a is provided on the first frame 28 and positions the liquid crystal panel 1 on the upper surface of the first frame 28. Reference numeral 28b denotes a stepped portion provided on the first frame 28, which is provided on the back surface of the first frame 28 in order to regulate the horizontal movement of the lens sheet 22 and the diffusion sheet 23. Two
Reference numeral 8c is a positioning protrusion, which is provided on the backlight unit side of the first frame 28.

Reference numeral 29 denotes a second frame in the second embodiment, and in the second embodiment, a rear frame made of resin, which is a claw 29 for fixing to a third frame described later.
a is provided. Reference numeral 29b denotes a notch portion, and among the inner walls of the second frame 29, at least one each is provided on at least two opposing surfaces except the surface in the vicinity of the light guide plate entrance surface 2b when the light guide plate 2 is provided inside the first frame. The light guide plate 2, the reflection sheet 21, the diffusion sheet 23, and the lens sheet 22 are provided at some locations.
Is provided with a protrusion so as to fit into the notch 29b. Reference numeral 29c is a positioning hole provided in the second frame 29, and is fitted with the positioning protrusion 28c.

The first frame 28 is a resin frame which facilitates the production of the positioning guide 28a, the step portion 28b and the positioning protrusion 28c, but the positioning guide 28a, the step portion 28b and the positioning protrusion 28c are used.
The resin is not limited to the above as long as it is provided.

Further, the second frame 29 is made of a resin which makes it easy to form the cutout portion 29b.
The cutout portion 29b is not limited to the resin, as long as the cutout portion 29b is provided.

The difference between the second embodiment and the first embodiment is only that the second frame 29 is provided with the cutout portion 29b, and the operation by the cutout portion 29b of the second frame 29 described later is performed. Except for the effects, the same operational effects as the first embodiment are achieved.

A method of assembling the backlight unit according to the second embodiment will be described. Second frame 2
The reflection sheet 21, the light guide plate 2 and the optical sheets 24 are inserted into the inside of the frame 9, and the cutout portion 29b of the second frame 29 is inserted.
The reflection sheet 21, the light guide plate 2, and the projections provided on the optical sheets 24 are fitted to each other to perform positioning. Next, the reflector 20 provided around the linear light source 3
It is fitted between the frame 29 and the light guide plate 2. Further, the positioning protrusion 28c of the first frame 28 is inserted into the positioning hole 29c of the second frame 29 to form a backlight unit.

Next, a method of assembling the liquid crystal display module will be described. First in the backlight unit
The liquid crystal panel 1 on which the liquid crystal drive IC is mounted is arranged according to the positioning guide 28a of the frame 28. Next, the third frame 27 is fitted from the liquid crystal panel 1 side, and the second frame 27
The claw 29a of the frame 29 and the claw hole 27a of the third frame 27 are engaged to complete the liquid crystal module.

As described above, according to the liquid crystal display module of Embodiment 2 of the present invention, the reflection sheet 21, the light guide plate 2 and the optical sheets 24 are positioned by the cutout portion 29b of the second frame 29. Therefore, from the backlight unit assembly process to the liquid crystal module assembly process,
It is not necessary to invert the frame 29, and the assembling workability can be improved.

[0043]

Since the present invention is constructed as described above, it has the following effects.

In the liquid crystal display device according to the present invention,
A first frame having a through hole, a light guide plate, a linear light source, and an illuminating means including a reflection sheet, a diffusion sheet, and a lens sheet as necessary, and positioning on the first frame with the illuminating means behind A liquid crystal panel, a second frame in which a lighting unit is provided, and a third frame which covers the liquid crystal panel except a portion corresponding to the display area thereof,
In the liquid crystal display module in which the second frame and the third frame are fixed by the fixing means, the first frame and the second frame are insertable and removable, so that the first frame and the second frame enter into the backlight unit. It is possible to prevent the generation of shavings between the frame and the second frame, and since the first frame and the second frame of the backlight unit are not engaged with each other, it is easy to assemble each member and to assemble Workability can be improved.

Further, the first frame and the second frame which enter into the backlight unit can be provided by providing the first frame with the notch portion which fits the protrusions of the light guide plate, the diffusion sheet, and the lens sheet. It is possible to prevent the generation of shavings with the frame, and since the first frame and the second frame of the backlight unit are not engaged with each other, it is easy to assemble each member and improve the assembly workability. It becomes possible.

Further, since the first frame is a resin mold frame, the first frame 25
In addition, it is possible to easily manufacture the cutout portion.

Furthermore, the light guide plate, the diffusion sheet, and the cutout portion which fits the protrusions of the lens sheet are provided in the second frame, so that the frame body is not inverted during the assembly process of the liquid crystal module. It is possible to shorten the assembly work time.

Further, since the second frame is a resin mold frame, the positioning guide 28a, the step portion 28b and the positioning protrusion 2 are added to the first frame.
8c can be easily manufactured.

[0049]

[Brief description of drawings]

FIG. 1 is a plan view of a liquid crystal panel on which a liquid crystal driving integrated circuit is mounted.

FIG. 2 is a front view of the backlight unit according to the first embodiment of the present invention.

3 (a) is a cross-sectional view taken along the line IIa-IIa of FIG. 2 and shows the backlight unit according to the first embodiment. FIG. 3B is a view IIb- in FIG.
FIG. 3 is a cross-sectional view taken along the line IIb, showing the backlight unit according to the first embodiment.

4 is a rear view of the backlight unit of FIG. 2 with a second frame removed.

5A is a sectional view taken along the line IVa-IVa in FIG. 4, and FIG. 5B is a sectional view taken along the line IVb-IVb in FIG.

6 is a plan view of a liquid crystal display module in which the liquid crystal driving IC mounted liquid crystal panel of FIG. 1 and the backlight unit of FIG. 2 are incorporated.

7 (a) is a cross-sectional view taken along the line VIa-VIa of FIG. 6 and shows the liquid crystal display module according to the first embodiment. FIG. 7B is a view VIb-VI in FIG.
FIG. 3 is a cross-sectional view taken along line b, showing the liquid crystal display module according to the first embodiment.

FIG. 8 is a front view of a backlight unit that is Embodiment 2 of the present invention.

9 (a) is a cross-sectional view taken along the line VIIIa-VIIIa of FIG. 8 and shows a backlight unit according to the second embodiment. FIG. 9B is a view VI of FIG.
FIG. 11 is a cross-sectional view taken along the line IIb-VIIIb, showing the backlight unit according to the second embodiment.

FIG. 10 is a front view of the backlight unit of FIG. 8 with the first frame removed.

11A is a sectional view taken along the line Xa-Xa in FIG. FIG. 11B is a view of FIG.
It is sectional drawing seen from the Xb-Xb line.

FIG. 12 (a) shows a second embodiment of the present invention.
12B is a side view of the first frame, and FIG. 12B is a rear view of the first frame according to the second embodiment of the present invention.

13 is a plan view of a liquid crystal display module incorporating the liquid crystal driving IC mounted liquid crystal panel of FIG. 1 and the backlight unit of FIG.

FIG. 14 (a) is a view taken along the arrow XIIIa-XI in FIG.
FIG. 11 is a cross-sectional view taken along the line IIa, showing the liquid crystal display module according to the second embodiment. FIG. 14B shows
FIG. 9 is a cross-sectional view taken along line XIIIb-XIIIb of FIG. 6B, showing the liquid crystal display module according to the second embodiment.

FIG. 15 is a plan view of a conventional liquid crystal display module with a metal frame removed.

16 is a sectional view taken along the line XV-XV in FIG.

[Explanation of symbols]

1 liquid crystal panel, 2 light guide plate, 3 linear light source, 2
1 Reflective Sheet, 22 Lens Sheet, 23 Diffusion Sheet, 25, 28 First Frame, 25c, 2
9b Notch, 26, 29 Second frame,
26a claw, 27 third frame, 27a claw hole

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takuya Kadota             997 Miyoshi, Nishigoshi-cho, Kikuchi-gun, Kumamoto             Ceremony Company Advanced Display F term (reference) 2H089 HA40 JA10 KA12 KA15 QA02                       QA08 QA09 QA11 QA12 TA16                       TA17 TA18 TA20                 2H091 FA23Z FA26Z FA32Z FA42Z                       LA02 LA07 LA09 LA11 LA12                       LA13 LA18

Claims (5)

[Claims] 1. A first frame having a through hole, a light guide plate,
A linear light source and, if necessary, an illuminating means including a reflection sheet, a diffusion sheet, and a lens sheet, a liquid crystal panel positioned on the first frame with the illuminating means behind, and the illuminating means. A second frame to be installed,
A liquid crystal display module, comprising: a third frame that covers the liquid crystal panel except a portion corresponding to a display area thereof, wherein the second frame and the third frame are fixed by a fixing unit. A liquid crystal display module, wherein the second frame is detachable. 2. The liquid crystal display module according to claim 1, wherein the first frame is provided with a cutout portion that fits into the protrusions of the light guide plate, the diffusion sheet, and the lens sheet. 3. The liquid crystal display module according to claim 2, wherein the first frame is a resin-made mold frame. 4. The liquid crystal display module according to claim 1, wherein the second frame is provided with a cutout portion that fits into the protrusions of the light guide plate, the diffusion sheet, and the lens sheet. 5. The liquid crystal display module according to claim 4, wherein the second frame is a resin-made mold frame.