JP2001021884A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable liquid crystal display device which prevents damage of its light transmission plate by impact in using or in transporting the display device and furthermore is capable of controlling and adjusting its brightness and light leakage. SOLUTION: A plastic resin 19 such as an epoxy resin with a high elastic modulus is buried in a clearance 18 being a gap between a light transmission plate 12 and a mold frame 16. The position where the plastic resin 19 is arranged desirably extends all over the clearance 18, however, it is optionally arranged only on the side face where a lug part 12a is provided or on the place adjacent to the lug part 12a. The refractive index of the plastic resin 19 is desirably close to the index of air on the boundary part along the light transmission plate 12. Optionally the surface roughness of the light transmission plate 12 is intentionally roughened, or treatment to provide difference in level such as ups and downs or projecting and recessing parts is imparted to it.

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 and, more particularly, to preventing a light guide plate from being damaged when subjected to a shock such as a drop during use or transportation, and to improve brightness and ears of a panel side surface. And a liquid crystal display device capable of controlling and controlling light leakage.

[0002]

2. Description of the Related Art FIG. 11 is an exploded perspective view showing the structure of a conventional liquid crystal display device. In the figure, 1 is a liquid crystal panel in which liquid crystal is sandwiched between an array substrate on which a plurality of scanning lines, signal lines and switching elements and pixel electrodes connected thereto are formed, and a color filter substrate, 2 is a cushion material,
Reference numeral 4 denotes a gate substrate connected to the liquid crystal panel 1 via a gate TCP 3 on which a driving IC is mounted. Reference numeral 6 denotes a source substrate connected to the liquid crystal panel 1 via a source TCP 5 on which a driving IC is mounted. An FPC (flexible circuit board), and a liquid crystal display element is configured by the liquid crystal panel 1, the gate TCP 3, the gate substrate 4, the source TCP 5, the source substrate 5, and the like. Reference numeral 8 denotes a front frame that covers the front surface of the liquid crystal display element, and reference numeral 9 denotes a backlight unit arranged below the liquid crystal display element. The backlight unit 9 in the conventional liquid crystal display device is shown in FIG.
As shown in FIG. 2, a plurality of sheets such as a reflection sheet 11, a diffusion sheet 13, a lens sheet 14, and a protection sheet 15, and a light guide plate 12 and metal frames arranged on both long sides of the light guide plate 12 are provided. The lamp unit 10 is a tubular light source that is protected and protected by a light source, and a mold frame 16 and a rear frame 17 that house these lamp units. In addition, the lamp unit 10 may be arranged on only one side of the long side of the light guide plate 12 as the liquid crystal display device becomes greener and lighter. Usually, a pair of projections (ears) are formed on both short sides of the light guide plate 12 as support portions for positioning and preventing displacement.

[0003]

In the current market of the liquid crystal display device, for example, in the case of a notebook personal computer, it is required to reduce the price as well as the weight, thickness and frame width as much as possible. Have been. For this reason,
In order to give priority to these demands, the strength of the liquid crystal display device is sacrificed, and the light guide plate 12 and the lamp unit 10 are damaged, line defects and distortion due to thermal factors, or a circuit caused by these factors. There is a risk of causing a malfunction or the like. For this reason, it has been desired to improve the reliability of the liquid crystal display device in terms of strength without a significant design change and an increase in the number of components. In particular, it is important to prevent the light guide plate 12 and the lamp unit 10 from being damaged by an impact such as dropping during use or transportation, and to support the light guide plate 12 for that purpose. As described above, simply forming the ears as the support on the side surfaces of the light guide plate 12 causes a large variation in the evaluation of the liquid crystal display device in terms of the susceptibility to damage and damage. In the removing operation, a small defect is likely to occur at the boundary between the ear and the side surface.
2 could be damaged.

For this reason, various countermeasures have conventionally been taken for supporting the light guide plate 12 and the lamp unit 10. For example, Japanese Patent Application Laid-Open No. 10-96900 discloses a liquid crystal display device in which a buffer member formed by winding a metal plate around a rubber surface is provided near both ends of a tubular light source to improve the strength of a lamp unit. I have. Also, Japanese Patent Application Laid-Open No. 9-13 / 1997
In Japanese Patent No. 8403, the load applied to the support portion of the light guide plate is reduced by chamfering the corner portion of the light guide plate to provide an oblique portion and providing the oblique portion also in the positioning portion of the mold frame in a form corresponding to the chamfer. 1 shows a liquid crystal display device in which the strength of a light guide plate is improved. However, it is difficult to say that all of the measures are sufficient. For example, when the latter diagonal portion is provided, there is a possibility that light leakage may occur when the liquid crystal display device is turned on.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to prevent a light guide plate from being damaged by an impact during use or transportation of a liquid crystal display device, and to further control brightness and light leakage. It is an object of the present invention to obtain a highly reliable liquid crystal display device which can be adjusted.

[0006]

According to the present invention, there is provided a liquid crystal display device comprising: a substantially rectangular thin plate light guide plate disposed below a liquid crystal display element; and a light guide plate disposed close to at least one side of the light guide plate. A liquid crystal display device including a light source and a backlight unit including a light guide plate and a mold frame accommodating the light source, wherein a cushioning material having a high elastic coefficient is provided in all or a specific portion of a gap between the light guide plate and the mold frame. It is a thing. The cushioning material enables brightness adjustment and control. Further, the light guide plate has a pair of protruding ears on both side surfaces different from the side surface on which the light source is arranged, and the cushioning material is provided around the ears. The cushioning material enables light leakage adjustment and control. Further, a plastic material such as an epoxy resin, a vinyl acetate resin, or an ethylene resin is used as the buffer material. Further, a cushioning material made of a polychlorinated resin or a polyethyl-based resin is used as a buffering material.

Also, a substantially rectangular thin plate light guide plate disposed below the liquid crystal display element, a light source disposed adjacent at least one side of the light guide plate, and a light guide plate provided on the other side surface of the light guide plate are provided. In a liquid crystal display device provided with a pair of projections, which are ears, and a backlight unit including a mold frame for accommodating a light guide plate and a light source, the ear end faces are inclined in the thickness direction. The mold frame adjacent to is also provided with a slope facing the ear part in parallel.

Also, a substantially rectangular thin plate-shaped light guide plate disposed below the liquid crystal display element, a light source disposed at least in close proximity to at least one side of the light guide plate, and light guide plates provided on the other two side surfaces of the light guide plate In a liquid crystal display device including a pair of projections, which are ears, and a backlight unit including a mold frame for accommodating the light guide plate and the light source, both sides of the light guide plate where the ears are provided are arranged in the thickness direction. In addition to the inclination, the mold frame adjacent to the side surface of the light guide plate is also inclined so as to face the side surface of the light guide plate in parallel.

A substantially rectangular thin plate light guide plate disposed below the liquid crystal display element, a light source disposed adjacent at least one side of the light guide plate, and light guide plates provided on the other side surfaces of the light guide plate. In a liquid crystal display device provided with a backlight unit including a mold frame for accommodating a light guide plate and a light source, a stepped step is formed at a boundary between a side surface of the light guide plate and the ear portion. It is provided.

[0010] Further, a substantially rectangular thin plate-shaped light guide plate arranged below the liquid crystal display element, a light source arranged at least in close proximity to at least one side surface of the light guide plate, and a light guide plate provided on both other side surfaces of the light guide plate are provided. In a liquid crystal display device including a pair of projections, which are ears, and a backlight unit including a light guide plate and a mold frame for accommodating a light source, a shock absorbing material is provided at a position close to the light guide plate ears of the mold frame. Are provided.

Also, a substantially rectangular thin plate-shaped light guide plate disposed below the liquid crystal display element, a light source disposed at least in close proximity to at least one side of the light guide plate, and a mold frame accommodating the light guide plate and the light source. In a liquid crystal display device provided with a backlight unit including
m is provided with a belt-shaped convex part. Further, the mold frame has a concave portion corresponding to the convex portion provided on the back surface of the light guide plate. Further, a liquid crystal display device according to the present invention is a combination of any one of the above liquid crystal display devices.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a backlight unit of the liquid crystal display device according to Embodiment 1 of the present invention, and FIG. 2 is a partially enlarged plan view showing the vicinity of a light guide plate ear. In the figure, reference numeral 10 denotes a lamp unit in which a tubular light source is protected by a metal frame, 12 denotes a substantially rectangular thin plate-like light guide plate disposed below the liquid crystal display element, and the lamp unit 10 is provided on one side of the light guide plate 12. They are located close together. Reference numeral 12a denotes a pair of projections provided on both side surfaces of the light guide plate 12, which are different from the side surface on which the lamp unit 10 is disposed. Reference numeral 16 denotes a mold frame for housing the lamp unit 10, the light guide plate 12, and the like. A backlight unit is constituted by the lamp unit 10, the light guide plate 12, a plurality of sheets (not shown) such as a reflection sheet and a diffusion sheet, and a mold frame 16 accommodating them (FIG. 12). reference). Reference numeral 18 denotes a clearance, which is a gap between the light guide plate 12 and the mold frame 16, and reference numeral 19 denotes a cushioning material provided in the clearance 18 and having a high elastic coefficient, such as a plastic resin such as an epoxy resin.

In the present embodiment, when the lamp unit 10 and the light guide plate 12 are housed in the mold frame 16,
A plastic resin 19 which is a cushioning material having a high elastic modulus is provided so as to be embedded in all or a specific portion of a clearance 18 which is a gap between the light guide plate 12 and the mold frame 16 so as to hold the light guide plate 12. is there. The position where the plastic resin 19 is provided is preferably the entire clearance 18 (FIG. 1A), but the damage of the light guide plate 12 caused by the impact is caused by the vicinity of the boundary between the ear 12 a and the side surface of the light guide plate 12. Since the probability of occurrence is high, it may be provided only on the side surface where the ear 12a is provided (FIG. 1B) or only around the ear 12a (FIG. 1C). In addition, the ear 12a
FIG. 2A shows the state of embedding of the plastic resin 19 in FIG.
As shown in the figure, it is desirable to provide it on all four corners,
As shown in FIGS. 2B and 2C, even if the lamp unit 10 is provided only in the vertical direction, damage due to impact can be prevented.

Next, a method of installing the plastic resin 19 will be described. First, the light guide plate 1 is placed in the mold frame 16.
2, a lamp unit 10 and a reflection sheet (not shown) are installed. In this state, for example, a two-component epoxy resin which is cured by causing a thermal reaction by mixing with a curing material is applied to a clearance 18 between the light guide plate 12 and the mold frame 16.
After confirming that the resin is cured at room temperature, a plurality of sheets (not shown) are provided to complete the backlight unit in the present embodiment.
In the present embodiment, an epoxy resin is used as the plastic resin 19, but a vinyl acetate resin or an ethylene resin may be used. It can be easily performed.
The refractive index of the plastic resin 19 is preferably close to air at the boundary with the light guide plate 12, and the surface roughness of the light guide plate 12 and the mold frame 16 is set so that no gap is formed at the boundary. May be intentionally roughened or a step of providing steps such as undulations and irregularities may be performed. Furthermore, it is premised that the color of the plastic resin 19 is provided for the purpose of adjusting and controlling the brightness. For example, the color is based on transparent or white and black, and red or green is added. Gold, silver, aluminum, a thin film, or the like may be used. Further, for example, it is also possible to add a metal or spherical particles to a transparent and colorless material to have a function of scattering light, or to intentionally provide a cavity inside the cushioning material. Similar measures can be taken also around the ears 12a to suppress the influence of light leakage. Further, for example, when the color of the mold frame is white or milky white, the mold frame side and the light guide plate side Even in a state where a clearance between the mold frame and the light guide plate exists in a part of a black or black-brown resin having a thickness of, for example, several microns, the effect of light leakage can be obtained.

Further, as the cushioning material in the present embodiment, a cushion material having a high elastic coefficient may be provided instead of the plastic resin 19. In this case, it is necessary to join the cushion material to the mold frame 16 in advance. As the cushioning material, it is desirable to use a cushioning material having elasticity made of, for example, a polychlorinated resin or a polyethyl-based resin. For example, a mold is formed along the shape of the light guide plate 12 or the mold frame 16 using polyethyl terephthalate. Then, it is fixed with a double-sided tape or an ethylene adhesive. The above description is based on the light guide plate 12.
Although the case where the ear portions 12a are provided on both side surfaces has been described, according to the present embodiment, the plastic resin 19 (cushion material) serving as a cushioning material is firmly fixed. Even if it comes off due to an impact, since the frictional resistance is high, it is possible to suppress the pressure on the lamp unit 10 at the time of the impact, so that the ear 12a need not be formed on the light guide plate 12.

Embodiment 2 3 to 5 are a partially enlarged plan view and a cross-sectional view showing the shapes of the ears of the light guide plate and the mold frame of the liquid crystal display device according to the second embodiment of the present invention, and FIG. 4) shows a cross section of a portion indicated by AA, and FIG. 4B shows a cross section of a portion indicated by BB in FIG. 4A. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated. In the present embodiment, the light guide plate 1
While the end face of the second ear 12a is inclined in the thickness direction,
Also on the mold frame 16 adjacent to the ear 12a,
It is inclined so as to face the ear 12a in parallel.
The inclination may be either a trapezoidal type as shown in FIG. 3 or an inverted trapezoidal type as shown in FIG. 4. By providing such an inclination, an impact from the longitudinal direction of the liquid crystal display device is received. At this time, an effect of improving strength and resistance to damage generated from the ear 12a can be obtained. FIG.
As shown in FIG. 5, both sides of the light guide plate 12 where the ears 12a are provided are inclined in the thickness direction, and the mold frame 16 adjacent thereto is also inclined so as to face the light guide plate 12 in parallel. Also, the effect of improving the strength of the light guide plate 12 against breakage can be obtained.

The angle of inclination of the ear 12a of the light guide plate 12 and the mold frame 16 is 5 to 85 degrees for an acute angle portion and 95 to 175 for an obtuse angle portion.
The above effect can be expected if the temperature is on the order of degrees. In the case of the trapezoidal type shown in FIG. 3, as the inclination angle A of the ear 12a becomes smaller, the pressure on the panel side generated when receiving an impact is alleviated, whereby the line defect in the TCP disconnection is also improved. Is obtained. Further, the frictional resistance between the ear 12a and the mold frame 16 adjacent thereto can be reduced.
In the case of the inverted trapezoidal type shown in FIG. 4, the frictional resistance between the ear 12a and the mold frame 16 adjacent thereto can be reduced as the inclination angle B of the ear 12a becomes larger than 90 degrees, and
Since distortion generated at the boundary between the ear 12a and the side surface of the light guide plate 12 can be reduced, the strength and resistance of the light guide plate 12 to impact can be further improved.

Embodiment 3 FIG. 6 is a partially enlarged plan view showing the shape near the ears of the light guide plate of the liquid crystal display device according to Embodiment 3 of the present invention. In the figure, reference numeral 12b denotes a step-like step provided at the boundary between the side surface of the light guide plate 12 and the ear 12a. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated. In the present embodiment, by providing a step-like step at the boundary between the side surface of the light guide plate 12 and the ear 12a, the contact area with the mold frame 16 generated when the light guide plate 12 receives an impact is reduced, and the load is reduced. The light guide plate 12 is dispersed to improve strength and resistance to damage of the light guide plate 12. Further, the light guide plate 1 according to the present embodiment
In the shape 2, the effect of suppressing defects at the boundary between the side surface of the light guide plate 12 and the ear 12a, which has conventionally occurred during the chamfering operation after forming the light guide plate 12, is also obtained.

Embodiment 4 FIG. 7 is a partially enlarged plan view showing a shape of a mold frame near a light guide plate ear of a liquid crystal display device according to Embodiment 4 of the present invention. In the figure, reference numeral 20 denotes a shock absorbing hole (hereinafter, referred to as a hole) provided at a position close to the light guide plate ear 12a of the mold frame 16. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated. In the present embodiment, by providing the hole 20 at a position close to the light guide plate ear 12a of the mold frame 16, the mold frame 16 is distorted when receiving an impact, and the effect of the impact on the light guide plate 12 is reduced. Things. The shape of the hole 20 may be an elliptical shape shown in FIGS.
A square or a circle (not shown) shown in (c) is desirable, but is not limited to this. The position where the hole 20 is installed is more effective when the hole 20 is closer to the ear 12 a of the light guide plate 12. For example, by forming the hole 20 with a thickness of about 1 to 2 mm from the end of the mold frame 16. The above effects can be expected.

Embodiment 5 FIG. 8 is a plan view and a side view showing the shape of the back surface of the light guide plate of the liquid crystal display device according to Embodiment 5 of the present invention. In the figure, 12c is the light guide plate 1
2 These are belt-shaped convex portions having a height of several mm provided on the back surface. Although FIG. 8A also shows the mold frame 16 and the lamp unit 10, FIG.
3C shows only the light guide plate 12, and the same and corresponding parts in the figures are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the vicinity of the center of the back surface of light guide plate 12 (FIG. 8)
(A)) or an upper part (FIG. 8 (b)), or an upper part and a side part (FIG. 8 (c)), a belt-shaped convex part 12c having a height of several mm is provided. Light plate 12
A concave portion corresponding to the convex portion 12c provided on the back surface is provided. Thereby, the warp and distortion of the light guide plate 12 toward the panel are reduced, and the light guide plate 1 when subjected to a shock is reduced.
2 can be minimized. In addition, when the thickness (width) of the liquid crystal display device is restricted, it is preferable that the height of the convex portion 12c be about 2 to 5 mm. Further, instead of providing the reflection sheet on the back surface of the light guide plate 12, metal evaporation is performed by an evaporation method or a sputtering method, so that the change of the reflection sheet caused by providing the protrusion 12c is not required.

Next, the method and results of the impact strength test performed on the liquid crystal display device according to the present invention shown in the first to fifth embodiments will be described with reference to FIGS. 9 and 10. FIG. FIG. 9A is a schematic diagram showing an impact test device used for the impact test of the liquid crystal display device shown in the first to fifth embodiments of the present invention. This device is used to apply a shock to a liquid crystal display device, and includes a main body and a control device 27.
And a cylinder 28 of compressed air or nitrogen. The liquid crystal display device 23 and the XY table 21 are fixed to the Z table 22 of the device by a support or an L-shaped bracket, and after reaching a predetermined height direction, an impact is applied by acceleration control. In the figure, 24 is a guide shaft, 25 is a programmer, and 26 is a hydraulic cylinder. Here, an impact is applied to the ears 12a of the light guide plate 12 in a direction in which a load is easily concentrated, and a prototype in which the lamp unit 10 is installed at a lower portion when the liquid crystal display device is arranged at the front is supported by a column having a height of about 30 mm. The test was carried out by fixing to a table using. In addition, as a method of applying a shock, both a half sine wave (FIG. 9B) and a trapezoidal wave (FIG. 9C) were used. For the half-sine wave, a test is performed to determine the limit speed change by changing the acceleration and speed while fixing the operation time.
The acceleration was increased until 2 was damaged. In addition, a trapezoidal wave was subjected to a test in which the acceleration was changed at a constant speed change to obtain a limit acceleration.

With the above method, a prototype of the liquid crystal display device of the present invention (here, the liquid crystal display device in which the plastic resin 19 shown in FIG. Fig. 1 shows the results of a test conducted in a state of being assembled in a 14-inch module, the state up to the occurrence of damage plotted on a damage fracture curve, and comparison with a conventional product.
0 is shown. The liquid crystal display device according to the present invention (FIG. 10)
In (b)), both the limit speed change and the limit acceleration exceeded the limits of the test device (FIG. 10D), and the damage / destruction area was smaller than that of the conventional liquid crystal display device (FIG. 10C). It is clear that the strength and the resistance of the light guide plate 12 to the impact are improved.

The structure of the liquid crystal display device shown in the first to fifth embodiments, for example, the plastic resin 19 (or cushion material) provided in the clearance 18, the shape of the light guide plate 12, its ears 12a and the mold frame 16 May be used alone, but more effects can be obtained by using a plurality of them in combination.

[0024]

As described above, according to the present invention, all or a specific portion of the gap between the light guide plate and the mold frame is provided.
By providing a cushioning material having a high elastic modulus, it is possible to prevent damage to the light guide plate due to an impact during use or transportation of the liquid crystal display device, and further, it is also provided for controlling and adjusting brightness and light leakage. Therefore, a highly reliable liquid crystal display device can be obtained.

In addition, the end faces of the ear portions of the light guide plate or both side surfaces on which the ear portions of the light guide plate are provided are inclined in the thickness direction, and the mold frame adjacent to the ear portions or the side surfaces of the light guide plate is also provided with the above-mentioned structure. By providing an inclination parallel to the ears and side surfaces, the coefficient of friction between the light guide plate and the mold frame can be reduced, and distortion generated at the boundary between the ear portions and the side surfaces of the light guide plate can be reduced. The strength and resistance to damage of the light plate are improved.

Further, by providing a step-like step at the boundary between the side surface of the light guide plate and the ear, the contact area with the mold frame generated when the light guide plate receives an impact is reduced, and the load is dispersed. It is possible to improve the strength and resistance to damage of the light guide plate and to suppress the defect at the boundary between the side surface of the light guide plate and the ear, which has conventionally occurred during the chamfering operation after forming the light guide plate.

Further, by providing a hole for absorbing shock at a position close to the ear of the light guide plate of the mold frame,
When the shock is applied, the mold frame is distorted, and the influence of the shock on the light guide plate is reduced, so that the light guide plate can be prevented from being damaged by the shock.

Further, a strip-shaped protrusion having a height of several mm is provided on the back surface of the light guide plate, and a concave portion corresponding to the protrusion provided on the back surface of the light guide plate is provided on the mold frame. Warpage and distortion can be reduced, and the movement of the light guide plate when subjected to an impact can be minimized, so that damage to the light guide plate due to an impact can be prevented, and reliability can be improved. , A liquid crystal display device having a high

[Brief description of the drawings]

FIG. 1 is a plan view showing a backlight unit of a liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 2 is a partially enlarged plan view showing the vicinity of a light guide plate ear of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged plan view and a partially enlarged cross-sectional view showing shapes of a light guide plate ear and a mold frame of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 4 is a partially enlarged plan view and a partially enlarged cross-sectional view showing shapes of a light guide plate ear and a mold frame of the liquid crystal display device according to the second embodiment of the present invention.

FIG. 5 is a partially enlarged plan view showing shapes of a light guide plate ear and a mold frame of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 6 is a partially enlarged plan view showing a shape near a lug of a light guide plate of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 7 is a partially enlarged plan view showing the shape of a mold frame near a light guide plate ear of a liquid crystal display device according to a fourth embodiment of the present invention.

8A and 8B are a plan view and a side view illustrating a shape of a back surface of a light guide plate of a liquid crystal display device according to a fifth embodiment of the present invention.

FIG. 9 is a schematic diagram showing an impact test apparatus used for an impact test of the liquid crystal display device according to the first to fifth embodiments of the present invention.

FIG. 10 is a diagram showing a damage destruction curve of the liquid crystal display device according to the first to fifth embodiments of the present invention and a conventional product.

FIG. 11 is an exploded perspective view showing a conventional liquid crystal display device.

FIG. 12 is an exploded perspective view showing a backlight unit of a conventional liquid crystal display device.

[Explanation of symbols]

1 liquid crystal panel, 2 cushion material, 3 gate TC
P, 4 gate substrate, 5 source TCP, 6 source substrate, 7 FPC, 8 front frame, 9 backlight unit, 10 lamp unit, 11 reflection sheet, 12 light guide plate, 12a ear, 12b step-like step, 12c convex Part, 13 diffusion sheet, 14 lens sheet (BEF), 15 protection sheet, 16 mold frame, 17 rear frame, 18 clearance, 1
9 plastic resin, 20 holes, 21 XY table,
22 Z table, 23 liquid crystal display, 24 guide shaft, 25 programmer, 26 hydraulic cylinder, 2
7 control units, 28 cylinders.

Claims (13)

[Claims] 1. A light guide plate disposed in a lower part of a liquid crystal display element and having a substantially rectangular thin plate shape, a light source disposed at least in close proximity to at least one side of the light guide plate, and the light guide plate and the light source are housed. A liquid crystal display device provided with a backlight unit including a mold frame, wherein a buffer material having a high elastic coefficient is provided in all or a specific portion of a gap between the light guide plate and the mold frame. . 2. The liquid crystal display device according to claim 1, wherein the buffering material enables brightness adjustment and control. 3. The light guide plate has a pair of projections on both side surfaces different from the side surface on which the light source is arranged, and a cushioning material is provided around the ears. Claim 1
The liquid crystal display device as described in the above. 4. The liquid crystal display device according to claim 3, wherein the cushioning member enables light leakage adjustment and control. 5. The liquid crystal display according to claim 1, wherein a plastic resin such as an epoxy resin, a vinyl acetate resin, or an ethylene resin is used as the buffer material. apparatus. 6. The liquid crystal display device according to claim 1, wherein a cushion material made of a polychlorinated resin or a polyethyl resin is used as the buffer material. 7. A light guide plate having a substantially rectangular thin plate shape disposed below the liquid crystal display element, a light source disposed near at least one side surface of the light guide plate, and a light guide plate disposed on both other side surfaces of the light guide plate. In a liquid crystal display device including a pair of projections, which are provided as ears, and a backlight unit including a mold frame accommodating the light guide plate and the light source, the ear end faces are inclined in a thickness direction. A liquid crystal display device characterized in that the mold frame adjacent to the ear portion is also inclined so as to face the ear portion in parallel. 8. A light guide plate having a substantially rectangular and thin plate shape disposed below the liquid crystal display element, a light source disposed near at least one side surface of the light guide plate, and a light guide plate disposed on the other side surface of the light guide plate. In a liquid crystal display device provided with a pair of projections provided as ears, and a backlight unit including a mold frame for housing the light guide plate and the light source, both side surfaces of the light guide plate provided with the ears A liquid crystal display device characterized in that the mold frame adjacent to the side surface of the light guide plate is also inclined in a direction parallel to the side surface of the light guide plate. 9. A light guide plate having a substantially rectangular thin plate shape disposed below the liquid crystal display element, a light source disposed at least in close proximity to at least one side of the light guide plate, and a light guide plate disposed on both other side surfaces of the light guide plate. In a liquid crystal display device provided with a backlight unit including a mold frame that houses the light guide plate and the light source, the liquid crystal display device includes a pair of protrusions provided as ears, and a boundary between the light guide plate side surface and the ears. A liquid crystal display device comprising a stepped step. 10. A substantially rectangular thin plate light guide plate disposed below the liquid crystal display element, a light source disposed adjacent at least one side of the light guide plate, and a light guide plate disposed on the other side surface of the light guide plate. In a liquid crystal display device including a pair of projections provided as ears, and a backlight unit including a mold frame accommodating the light guide plate and the light source, a position of the mold frame close to the light guide plate ears. A liquid crystal display device provided with a hole for absorbing shock. 11. A light guide plate having a substantially rectangular and thin plate shape disposed under the liquid crystal display element, a light source disposed at least in close proximity to at least one side of the light guide plate, and accommodating the light guide plate and the light source. A liquid crystal display device including a backlight unit including a mold frame, wherein a strip-shaped convex portion having a height of several mm is provided on the back surface of the light guide plate. 12. The liquid crystal display device according to claim 11, wherein the mold frame has a concave portion corresponding to the convex portion provided on the back surface of the light guide plate. 13. A liquid crystal display device comprising a combination of a plurality of the liquid crystal display devices according to claim 1. Description: