KR102274246B1 - Liquid crystal display device module - Google Patents

Abstract

The present invention discloses a liquid crystal display module. More particularly, it relates to a liquid crystal display module used in an electronic information providing device mounted in a vehicle such as a navigation device, which maintains rigidity in a high-temperature environment and is resistant to damage.
According to an embodiment of the present invention, by providing a clasp of a specific shape for coupling with the cover bottom inside the guide panel, it is possible to improve the ease of coupling of the liquid crystal display module and prevent separation due to deformation. there is

Description

Liquid crystal display module {LIQUID CRYSTAL DISPLAY DEVICE MODULE}

The present invention relates to a liquid crystal display module, and more particularly, to a liquid crystal display module used in an electronic information providing device mounted in a vehicle such as a navigation device, which maintains rigidity in a high temperature environment and is resistant to damage.

Flat panel display devices are widely applied to various portable devices such as mobile phones and notebook computers and stationary display devices that realize high-resolution and high-quality images such as HDTVs, Recently, it has been developed in a form in which a module is directly mounted in a vehicle as an embedded display device such as a navigation system.

Although LCD (Liquid Crystal Display), PDP (Plasma Display Panel), FED (Field Emission Display), and OLED (Organic Light Emitting Diodes) have been actively studied as such flat panel display devices, mass production technology, ease of driving means, and high quality Liquid crystal display (LCD) is currently in the spotlight due to the reason of realization and realization of a large-area screen.

The above-described liquid crystal display device uses a passive transmission display device, includes a liquid crystal panel in which two substrates having liquid crystal molecules interposed therebetween, and controls the amount of light transmitted through the liquid crystal layer by the refractive index anisotropy of the liquid crystal layer to obtain a desired image. will be displayed on the screen. Accordingly, in a conventional liquid crystal display device, a liquid crystal panel and a backlight unit providing light thereto are provided.

In addition, the liquid crystal panel and the backlight unit are modularized by combining with the liquid crystal panel and mechanical structures such as a guide panel and a cover bottom for maintaining rigidity from external forces and supporting the rear surface.

1 is a diagram schematically showing a cross-sectional structure of a conventional liquid crystal display module.

Referring to FIG. 1 , a conventional liquid crystal display module 1 includes a liquid crystal panel 10 for displaying an image, a backlight unit 20 disposed on the rear surface of the liquid crystal panel 10 to supply light, and a liquid crystal panel ( 10) and a mechanism structure 30 for modularizing the backlight unit 20 .

In particular, in the liquid crystal display module 1 having this structure, the mechanical structure 30 is largely divided into a guide panel 32 on which the liquid crystal panel 10 is mounted, and a cover bottom 35 on which the backlight unit 20 is mounted. In addition, as the inner wall of the guide panel 32 and the outer wall of the cover bottom 35 are combined, it is modularized.

Here, the guide panel 32 is typically manufactured by injection molding using a resin material, and the cover bottom 35 may be manufactured using a resin material or a metal material. The guide panel 32 and the cover bottom 35 are mechanically coupled to each other.

According to the coupling structure, when the liquid crystal display module 1 is used in a room temperature environment, the fastening state of the mechanical structure 30 is stably maintained, and the liquid crystal panel 10 and the backlight unit 20 flow from an external force. It is fixed without any damage and is prevented from being damaged.

However, when the liquid crystal display module 1 is mounted in the same form as an in-vehicle navigation device or used in other high-temperature environments, not in a room temperature environment, the resin guide panel 32 is not deformed by heat such as warping. will occur

2 illustrates a modified form of the mechanical structure 30 of the liquid crystal display module that occurs in a high-temperature environment. Referring to FIG. 2, a guide panel 32 typically made of a resin material in a high-temperature environment of about 85° C. or higher. ) is deformed and the coupling with the cover bottom 35 can be dismantled, and a force is applied to the side of the liquid crystal panel 10 seated on the upper portion, so that the image displayed on the liquid crystal panel 10 has MURA quality. will cause defects. In addition, deformation of the guide panel 32 may cause a change in the outer size of the liquid crystal display module.

The thermal deformation problem is a major cause of lowering the image quality of the liquid crystal display device and lowering durability and reliability in a specific environment.

The present invention has been devised to improve the above problems, and an object of the present invention is to provide a liquid crystal display module that maintains rigidity of a mechanical structure and minimizes deformation even in a high temperature environment such as a vehicle.

In order to achieve the above object, a liquid crystal display module according to a preferred embodiment of the present invention includes a liquid crystal panel, a backlight unit provided on a rear surface of the liquid crystal panel, and a liquid crystal panel and a backlight unit mounted thereon to modularize the display device. As a liquid crystal display module including a mechanism structure, in particular, the mechanism structure of the present invention supports a side rear surface of a liquid crystal panel, a guide panel having one or more latches formed on the inner surface, and a backlight unit are mounted in the inner space, , It characterized in that it comprises a cover bottom in which one or more fastening holes into which the clasp part is inserted are formed on the outer surface.

The liquid crystal display module according to an embodiment of the present invention is provided with a latch part having a specific shape for coupling with the cover bottom inside the guide panel, thereby improving the ease of coupling of the liquid crystal display module and preventing separation due to deformation. There is an effect that can be done.

1 is a diagram schematically showing a cross-sectional structure of a conventional liquid crystal display module.
2 is a view illustrating a modified form of the mechanical structure of the liquid crystal display module generated in a high-temperature environment.
3 is an exploded perspective view of the entire structure of the liquid crystal display module according to the first embodiment of the present invention.
4 is a cross-sectional view illustrating an assembled state of the liquid crystal display module according to the first embodiment of the present invention.
5 is a view showing a perspective view of the guide panel according to the first embodiment of the present invention viewed from the bottom direction.
6 is a view showing a coupling structure of a guide panel and a cover bottom of the liquid crystal display module according to the first embodiment of the present invention, and is an enlarged view of part B of FIG. 4 .
7 is a view showing a coupling structure between a guide panel and a cover bottom in a liquid crystal display module according to a second embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are exemplary, and thus the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

When 'to include', 'includes', 'have', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is interpreted as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between the two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, when a temporal relationship is described as 'after', 'following', 'after', 'before', etc., 'immediately' or 'directly' Unless ' is used, cases that are not continuous may be included.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

Each feature of the various embodiments of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each embodiment may be implemented independently of each other or may be implemented together in a related relationship. may be

Hereinafter, a liquid crystal display module according to a preferred embodiment of the present invention will be described with reference to the drawings.

3 is an exploded perspective view showing the entire structure of the liquid crystal display module according to the first embodiment of the present invention, and FIG. 4 is a cutaway view of the liquid crystal display module according to the first embodiment of the present invention in an assembled state. It is a drawing showing the figure.

3 and 4, the liquid crystal display module 100 according to the first embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120 provided on the rear surface of the liquid crystal panel 110, and a mechanism structure 130 on which the liquid crystal panel 110 and the backlight unit 120 are mounted, wherein the mechanism structure 130 supports a side rear surface of the liquid crystal panel 110 and has one or more latches on the inner surface. A cover bottom in which the guide panel 132 in which the part 133 is formed and the backlight unit 120 are mounted in the inner space, and at least one fastening hole 136 into which the clasp part 133 is inserted is formed on the outer surface. (135).

In detail, the liquid crystal panel 110 includes a plurality of pixels defined, and a liquid crystal layer (not shown) in which an array substrate 111 and a color filter substrate 112 are bonded to each other by a predetermined distance and interposed therebetween. . Also, although not shown, a driver IC (not shown) for applying control and image signals to the pixels may be mounted on one side of the array substrate 111 .

In detail, the array substrate 111 of the liquid crystal panel 110 is arranged in the first and second directions to form signal lines defining a plurality of pixels. A thin film transistor serving as a switching element is provided in each pixel area. The thin film transistor has a gate electrode connected to the gate wiring, a semiconductor layer formed by stacking amorphous silicon on the gate electrode, and a source electrode and a drain electrode formed on the semiconductor layer and electrically connected to the data line and the pixel electrode. can be done

In addition, the color filter substrate 112 is a color filter composed of a plurality of sub color filters that implement colors of red, green, and blue, and separates each sub color filter and transmits the liquid crystal layer. It is made of a black matrix (BM) that blocks light.

The array and color filter substrates 111 and 112 are bonded to face each other by a sealant applied to the outside of the pixel area to constitute the liquid crystal panel 100 . Also, although not shown, a polarizing plate (not shown) for linearly polarizing light may be attached to the surfaces of the bonded array and color filter substrates 111 and 112 .

The backlight unit 120 includes an LED package 121 , a package substrate 122 , a reflection plate 123 , a light guide plate 124 , and an optical sheet 125 .

The LED package 121 is a plurality of light sources disposed on one side under the liquid crystal panel 110 and emitting light, and is bonded in a line on one surface of the package substrate 122 . The LED package 121 may include R, G, and B LED devices emitting monochromatic light of each of R (Red), G (Green), and B (Blue), or a WLED device in which one device emits white light. .

The LED packages 121 are arranged in a line on the package substrate 122 , and the light emitting surface is arranged to face the incident surface of the light guide plate 124 . To this end, the bottom surface of the package substrate 122 may be arranged side by side with the inner surface of the cover bottom 135 .

The reflecting plate 123 is mounted on the bottom surface of the cover bottom 135 and serves to reflect a portion of light emitted from the light guide plate 124 to be described later to the light guide plate 124 again.

The light guide plate 124 is disposed inside the guide panel 132 to correspond to the rear surface of the liquid crystal panel 110 , and serves to guide most of the light emitted from the LED package 121 in the direction of the liquid crystal panel 110 . . Accordingly, the light incident on the light guide plate 124 is repeatedly refracted and reflected by the diffuser added therein, travels to the other side, and then exits to the upper portion of the light guide plate 124 .

One or more optical sheets 125 are disposed on the upper surface of the light guide plate 124 . The optical sheet 125 may be composed of a diffusion sheet for evenly spreading the incident light over the entire area of the liquid crystal panel 110 and a plurality of prism sheets for improving the straightness of the light.

The backlight unit 120 having the above-described structure is mounted in the mechanism structure 130 including the guide panel 132 and the cover bottom 135 .

The guide panel 132 is a rectangular frame, and the chin on which the liquid crystal panel 110 is seated protrudes in the inner direction, and the liquid crystal panel 110 is attached to the upper portion of the guide panel 132 by a double-sided tape 145 . In the inner opening, the light guide plate 124 and the optical sheet 125 are mounted in a stacked form. Here, the double-sided tape 145 not only fixes the liquid crystal panel 110 on the guide panel 131 without flow, but also serves to prevent light leakage from the light emitted from the backlight unit 120 leaking to the outside. do.

The cover bottom 135 has a shape in which an upper region is opened, four side surfaces and a lower region are closed, a reflective plate 123 is disposed on the bottom surface, and the backlight unit 120 is mounted on the top of the reflective plate 123 . do. In particular, fastening holes 136 are formed on the outside of the four sides of the cover bottom 135 to correspond to the clasp portion 133 .

In particular, FIG. 5 shows the structure of the guide panel 132 as viewed from the rear side, and as shown in FIG. 5 , one or more latch parts 133 are formed inside the four sides of the guide panel 132 , have. As the latch part 133 is inserted into the fastening hole 136 formed to correspond to the outside of the four sides of the cover bottom 135 , the guide panel 132 and the cover bottom 135 are fixed. The number of the latch parts 133 is determined in consideration of the coupling force between the guide panel 132 and the cover bottom 135 and the ease of the assembly process. In the drawing, the clasp portion 133 illustrates a structure provided with four as a major axis and three as a minor axis of the guide panel 132 . In addition, the clasp portion 133 has an inclined surface that becomes thinner in the coupling direction with the cover bottom 135 , and has a structure in which the thickness is kept constant at the top. Accordingly, the guide panel 132 is assembled along the inclined surface of the clasp 133 in a form to surround the outside of each side of the cover bottom 135 when assembling the liquid crystal display module 100 , so that the assembly process is easy After assembly, the upper portion of the clasp portion 133 is engaged with the hole of the cover bottom 135 to suppress deformation of the guide panel 132 due to heat and minimize the separation phenomenon.

The guide panel 132 may be integrally formed with the clasp 133 and manufactured by injection molding using a polycarbonate material, and the cover bottom 135 may be formed of metal by a press method. material can be made.

On the other hand, the clasp portion 133 of the guide panel 132 described above is easy to assemble according to its shape and at the same time has a strong characteristic against deformation due to heat. Hereinafter, with reference to the drawings, a liquid crystal display according to an embodiment of the present invention The structure of the guide panel 132 of the device module 100 will be described in detail.

6 is a view showing a coupling structure of a guide panel and a cover bottom of the liquid crystal display module according to the first embodiment of the present invention, and is an enlarged view of part B of FIG. 4 .

Referring to FIG. 6 , the guide panel 132 and the cover bottom 135 of the liquid crystal display module of the present invention are coupled to each other by inserting the clasp 133 into the fastening hole 136 from each side. The latch part 133 is formed in a shape protruding inward from the side surface of the guide panel 132 , and in its shape, the inclined part 1331 and the inclined part 1331 of a triangular shape having an inclined surface in cross section are extended. It can be divided into an extension 1332 having a rectangular shape.

The inclined portion 1331 has an inclined surface whose thickness gradually becomes narrower from the upper direction to the lower direction, and the inclined surface is formed to have a predetermined angle Θ with respect to the vertical line. The angle of the inclined surface is determined to correspond to the height G1 of the inclined portion 1331 and the length of the base G2.

In detail, the inclined portion 1331 is a dimension that can minimize the ease of assembly and the departure of the guide panel 132 during thermal deformation, and has a height (G1) of 0.7 mm ± 0.05 mm and a base (G2) of 0.7 mm ± 0.05 mm. 0.8 mm ± 0.1 mm and the angle is determined within the range of 45 ° ± 5 °.

When the guide panel 132 is coupled to the top of the cover bottom 135 in the liquid crystal display module assembling process, the guide panel 132 descends along the inclined surface of the inclined portion 1331 of this shape to form the cover bottom ( 135) so that it can be combined.

The extension 1332 of the clasp 133 is formed above the inclined portion 1331 , that is, in a direction opposite to the coupling direction, and the clasp 133 is inserted into the fastening hole 136 when coupled. As a result, it is engaged with the upper portion of the fastening hole 136 . According to this structure, even when the guide panel 132 is deformed due to heat applied to the liquid crystal display module, the side surface of the guide panel 132 is supported so as not to be separated from the cover bottom 135 .

The extended portion 1332 has a horizontal length G1 of 0.7 mm ± 0.05 mm and a vertical length G3 of 0.5 mm ± 0.1 mm.

The above dimensions are, as the latch part 133 protrudes into the guide panel 132 when assembling the liquid crystal display device, the guide panel 132 is bent and descends along the outer surface of the cover bottom 135 to form the fastening part ( 136) is determined within the range that can be inserted.

On the other hand, when the liquid crystal display module is continuously exposed to a high temperature environment, the guide panel is greatly deformed, and thus the latch part 133 may be separated from the fastening hole 136 . Hereinafter, a structure of a liquid crystal display module according to a second embodiment of the present invention will be described with reference to the drawings.

The structure of the backlight unit and the mechanism structure of the liquid crystal display module according to the second embodiment of the present invention is similar to that of the first embodiment, except that the problem of detachment due to deformation of the clasp is further improved.

7 is a view showing a coupling structure between a guide panel and a cover bottom in a liquid crystal display module according to a second embodiment of the present invention.

Referring to FIG. 7 , the liquid crystal display module according to the second embodiment of the present invention has a structure in which the inner surface of the guide panel 232 is coupled to the outer surface of the cover bottom 235 in contact with the first embodiment. It is the same as the example, but there is a difference in that the inclined surface of the clasp 233 formed on the guide panel 232 has an arc shape having a curvature rather than a straight line when viewed in cross section. That is, the clasp portion 233 is characterized in that the cross-section of one corner has a curved shape.

In detail, the clasp portion 233 is formed in a shape protruding inward from the side surface of the guide panel 232 , and in its shape, a round portion 2331 and a round portion 2331 having an arc-shaped cross-section are formed. It can be divided into first and second extension parts 2332 and 2333 extending and having a right-angled shape.

The round portion 2331 has a shape in which the thickness becomes increasingly narrow as going from the upper direction to the lower direction, and the cross section has an arc shape.

In detail, the round part 2331 may have a radius R of 0.3 mm ± 0.1 mm, and the first and second extension parts 2332 and 2333 from which the round part 2331 extends are cross-sections, respectively. This is a rectangle.

When the guide panel 232 is coupled from the top of the cover bottom 235 in the assembly process of the liquid crystal display module similarly to the first embodiment by the round part 2331 having this shape, the guide panel ( 232 is lowered so as to be coupled to the cover bottom 235 .

And, the first extension 2332 of the clasp portion 233 is formed in the upper portion of the inclined portion 2331, that is, in a direction opposite to the coupling direction, and when the clasp portion 233 is coupled, the inside of the fastening hole 236 . It is engaged with the upper portion of the fastening hole 236 as it is inserted into the . According to this structure, even if the guide panel 232 is deformed due to heat applied to the liquid crystal display module, the side surface of the guide panel 232 is supported so as not to be separated from the cover bottom 235 .

In addition, in the second embodiment of the present invention, the second extension portion 2333 is formed to be engaged at the lower portion of the fastening hole 235, so that the clasp portion 233 is supported even when it is deformed by continuous heat.

The horizontal length G4 of the first extension 2332 is 0.85 mm ± 0.05 mm, and the vertical length G5 is 1.0 mm ± 0.1 mm, and the horizontal length G6 of the second extension 2333 is is determined to be 0.55 mm ± 0.05 mm, and the vertical length (G7) is 0.3 mm ± 0.1 mm.

Although many matters are specifically described in the foregoing description, these should be construed as examples of preferred embodiments rather than limiting the scope of the invention. Accordingly, the invention should not be defined by the described embodiments, but should be defined by the claims and equivalents to the claims.

100: liquid crystal display module 110: liquid crystal panel
111: lower substrate 112: upper substrate
120: backlight unit 121: LED package
122: package substrate 123: reflector
124: light guide plate 125: optical sheet
130: mechanism structure 132: guide panel
133: clasp 135: cover bottom
136: fastening hole 145: double-sided tape

Claims (6)

liquid crystal panel;
a backlight unit provided on a rear surface of the liquid crystal panel; and
and a mechanism structure on which the liquid crystal panel and the backlight unit are mounted,
The mechanism structure is
a guide panel supporting a side rear surface of the liquid crystal panel and having one or more clasps formed on the inner surface; and
A cover bottom in which the backlight unit is mounted in the inner space, and at least one fastening hole into which the clasp is inserted is formed on the outer surface
includes,
The clasp portion has a curvature, and includes a round for inserting the clasp part into the fastening hole, a first extension part and the round part extending in a first direction to engage the inside of the fastening hole from an upper portion and the first round part It extends in a second direction perpendicular to the direction and includes a second extension portion engaged with the inside of the fastening hole from the bottom,
The round part, the radius (R) is 0.3 mm ± 0.1 mm,
A horizontal length (G4) of the first extension is 0.85 mm ± 0.05 mm, a vertical length (G5) is 1.0 mm ± 0.1 mm, and a horizontal length (G6) of the second extension is 0.55 mm ± 0.05 mm, a vertical length (G7) is a liquid crystal display module, characterized in that 0.3 mm ± 0.1 mm.
The method of claim 1,
A side surface of the cover bottom positioned below the fastening hole has a first thickness, and a side surface of the cover bottom positioned above the fastening hole has a second thickness that is thinner than the first thickness.
delete delete delete delete

Images