KR20170080791A

KR20170080791A - Electronic device including liquid crystal display device

Info

Publication number: KR20170080791A
Application number: KR1020150189790A
Authority: KR
Inventors: 윤정기
Original assignee: 엘지디스플레이 주식회사
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2017-07-11

Abstract

Disclosure of the Invention Problems to be Solved by the Invention There is a problem in providing a method for improving the phenomenon of air bubbles occurring between a cover glass and a liquid crystal panel due to an external force.
To this end, a groove is formed in the frame of the device and a starter structure is formed in the groove of the LCD module.
Accordingly, even if an external force is generated upward in the cover glass due to an external impact such as a drop test, upward force acts on the liquid crystal panel of the liquid crystal display module, thereby preventing a decrease in adhesion between them, And it is possible to improve defective products and increase in product cost due to bubble generation.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device including a liquid crystal display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electronic apparatus having a liquid crystal display device, and more particularly, to an electronic apparatus having a liquid crystal display device capable of improving bubbles between a cover glass and a liquid crystal panel To an electronic apparatus.

2. Description of the Related Art [0002] As an information society develops, there has been a growing demand for display devices for displaying images. Recently, liquid crystal display devices (LCDs), plasma display panels (PDPs) Various flat display devices such as an organic light emitting diode (OLED) have been utilized.

Of these flat panel display devices, liquid crystal display devices are widely used because they have advantages of miniaturization, weight reduction, thinness, and low power driving.

2. Description of the Related Art Recently, portable electronic devices such as a smart phone and a tablet have become widespread and liquid crystal display devices have been widely used as display devices thereof. In addition, a cover glass having a touch function is attached to a liquid crystal display .

1 is a cross-sectional view schematically showing an electronic device having a conventional liquid crystal display device.

1, the electronic apparatus 10 includes a liquid crystal display module 20 having a liquid crystal panel 30, a backlight unit 40, a guide panel 50 supporting the backlight unit 40, and a bottom cover 60, A cover glass 70 attached through a first adhesive member 91 to a display surface in front of the liquid crystal panel 30 and a liquid crystal display module 20 with a cover glass 70 mounted thereon, (80).

Here, the cover glass 70 is attached to the upper surface of the side wall of the machine frame 80 at the edge through the second adhesive member 92.

The lower back surface of the LCD module 20, that is, the bottom cover 60, is spaced apart from the bottom surface of the device frame 80 by a predetermined distance to define a spacing therebetween. . That is, when the device frame 80 and the lower portion of the liquid crystal display module 20 are in close contact with each other, an impact is transmitted to the backlight unit 40 through the lower portion of the liquid crystal display module 20, The bottom cover 60 and the device frame 80 are disposed apart from each other.

However, in the conventional structure, deformation of the cover glass 70 occurs due to an external impact in the process of dropping the product, and bubbles are generated in the first adhesive member 91 between the cover glass 70 and the liquid crystal panel 20 .

2, external force generated by a repulsive impact with the ground during the drop test is transmitted to the cover glass 70 through the apparatus frame 80, and is transmitted forward from the edge of the cover glass 70 The bending deformation of the bending moment is generated.

The liquid crystal display device module 20 has a force in the direction of the rear unit frame 80 due to the inertia when colliding with the ground surface because the space is formed between the liquid crystal display module 20 and the unit frame 80. [ And flows backward. At this time, since the liquid crystal panel 30 is attached to the guide panel 50 through the third adhesive member 93 and the fixing force is applied to the rear side, a force acting backward also acts on the liquid crystal panel 30.

As a result, the first adhesive member 91 and the cover glass 70 or the liquid crystal panel 30 (see FIG. 1) ) Is weakened to cause a gap at the edge, thereby introducing air bubbles.

When such bubbles are generated, the product is treated as defective and the product cost is increased.

Disclosure of the Invention Problems to be Solved by the Invention There is a problem in providing a method for improving the phenomenon of air bubbles occurring between a cover glass and a liquid crystal panel due to an external force.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal display module including a liquid crystal panel, a backlight unit and a bottom cover having a first sidewall, a cover glass attached to a display surface of the liquid crystal panel, An instrument frame having an inner space in which the module is accommodated and a second sidewall portion in which an edge portion of the cover glass is attached to the upper surface; a first starter bent outward at an upper end of the first sidewall portion; and a second starter bent downward at an upper end of the second sidewall portion The present invention provides an electronic apparatus having a liquid crystal display device including a concave groove in which the first starter is seated.

Here, the liquid crystal display module may include a guide panel including a second stopper which is bent outward from the upper end and is in close contact with the first stopper.

At least one of the first stoppers may correspond to each of the first sidewall portions disposed opposite to each other.

Further, the bottom cover has a first base portion on which the backlight unit is seated, and the device frame may have a second base portion spaced apart from the first base portion and positioned rearward.

In another aspect, the present invention provides a liquid crystal display comprising a liquid crystal panel, a backlight unit, a bottom cover including a first side wall portion, a cover glass attached to a display surface of the liquid crystal panel, A liquid crystal display device including the liquid crystal display device is provided.

Here, the guide panel may include a second starter that is bent outward from the upper end and is in close contact with the first starter.

In the present invention, a recess is formed in the device frame and a starter structure is formed in the recess in the LCD module.

Accordingly, even if an external force is generated upward in the cover glass due to an external impact such as a drop test, upward force acts on the liquid crystal panel of the liquid crystal display module, thereby preventing a decrease in adhesion between them, And it is possible to improve defective products and increase in product cost due to bubble generation.

1 is a cross-sectional view schematically showing an electronic device having a conventional liquid crystal display device
2 is a view showing a state in which air bubbles are generated between a cover glass and a liquid crystal panel in a drop test process for a conventional electronic apparatus shown in Fig. 2; Fig.
3 is a perspective view schematically showing an electronic device having a liquid crystal display device according to an embodiment of the present invention.
4 is an enlarged partial perspective view of a portion where the bottom cover and the machine frame are engaged with each other in the electronic apparatus of Fig.
5 is a cross-sectional view illustrating an electronic apparatus having a liquid crystal display device according to an embodiment of the present invention.
6 is a view showing a state where bubbles are prevented from occurring between a cover glass and a liquid crystal panel in a drop test process for an electronic device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a perspective view schematically showing an electronic device having a liquid crystal display device according to an embodiment of the present invention, FIG. 4 is an enlarged view of a portion where the bottom cover and the device frame are joined, And FIG. 5 is a cross-sectional view of an electronic device having a liquid crystal display device according to an embodiment of the present invention, showing a part of an electronic device cut along the major axis direction of the electronic device.

An electronic device 100 according to an embodiment of the present invention may include a liquid crystal display device module 200, a cover glass 300, and a device frame 400.

Here, the direction on the drawing may be defined for convenience of explanation. The direction of the display surface of the liquid crystal panel 100 is referred to as forward or upward (or upward), and the direction opposite thereto is referred to as rearward or downward (or downward) .

The liquid crystal display module 200 may include a liquid crystal panel 210, a backlight unit 220, a guide panel 230, and a bottom cover 250, These constituent elements are combined to constitute a modularized liquid crystal display module 200 fixed to each other.

The liquid crystal panel 210 includes first and second substrates 212 and 214 bonded to each other to face each other and a liquid crystal layer (not shown) interposed between the two substrates 212 and 214.

Although not shown in detail, on the inner surface of the first substrate 212 called a lower substrate or an array substrate, a plurality of gate wirings and data wirings cross each other to define pixels, and thin-film transistors And a pixel electrode connected to the thin film transistor may be formed.

On the inner surface of the second substrate 214 called an upper substrate or a color filter substrate, a color filter pattern corresponding to each pixel and a color filter pattern are formed. A black matrix may be formed.

Any type of liquid crystal panel may be used as the liquid crystal panel 210, for example, IPS, AH-IPS, TN, VA, and ECB. Here, in the case where the IPS method or the AH-IPS method is used, a common electrode for forming a transverse electric field together with the pixel electrode may be formed on the first substrate 212.

An alignment layer may be formed on the interface between the first and second substrates 212 and 214 and the liquid crystal layer to determine the initial molecular alignment direction of the liquid crystal and may prevent leakage of the liquid crystal layer filled between the first and second substrates 212 and 214 A seal pattern may be formed along the edges of the two substrates 212 and 214. [

In addition, a polarizing plate for selectively transmitting a specific polarized light may be attached to the outer surfaces of the first and second substrates 212 and 214, respectively.

The printed circuit board is connected to at least one edge of the liquid crystal panel 210 via a connection member such as a flexible circuit board or a tape carrier package so as to be brought into close contact with the bottom surface of the bottom cover 250 .

A backlight unit 220 is disposed behind the liquid crystal panel 210 configured as described above.

The backlight unit 220 includes an LED assembly 229, a white or silver reflection plate 225, a light guide plate 223 that is seated on the reflection plate 225, and an optical sheet 221 on the light guide plate 223 .

The LED assembly 229 includes a plurality of LEDs 229a that function as a light source of the backlight unit 220 and face the light incoming surface of the light guide plate 223 and a plurality of LEDs 229a, 229b.

The light guide plate 223 on which the light emitted from the plurality of LEDs 229a is incident is illuminated uniformly over a wide area of the light guide plate 223 while the light incident from the LED 229a travels through the light guide plate 223 by total reflection several times So that the liquid crystal panel 210 can be provided with a uniform surface light.

The reflection plate 225 is positioned behind the light guide plate 223 and functions to reflect the light that has passed through the back surface of the light guide plate 223 toward the liquid crystal panel 210 to improve the brightness of light.

The optical sheet 221 positioned on the light guide plate 223 may include, for example, a diffusion sheet and a light condensing sheet. The optical sheet 221 diffuses and condenses the light emitted from the light guide plate 223, So that a more uniform surface light can be incident.

The liquid crystal panel 210 and the backlight unit 220 configured as described above can be modularized through the guide panel 230 and the bottom cover 250.

The guide panel 230 may be configured to have a substantially rectangular shape surrounding the side surfaces of the liquid crystal panel 210 and the backlight unit 220. The guide panel 230 may surround the backlight unit 220 The bottom cover 250 can be positioned and modularized.

The bottom cover 250 may include a first base portion 251, a first side wall portion 252, and a first stopper 253.

The first base unit 251 may have a substantially plate shape and the backlight unit 220 may be mounted on the first base unit 251.

The first side wall portion 252 may be configured to be bent vertically upward from the side edges of the first base portion 251. In this embodiment, four first sidewall portions 252 bent upward from four sides are formed. In this case, the first sidewall portions 252 adjacent to each other are connected to each other, .

The liquid crystal panel 210 and the backlight unit 220 and the guide panel 230 surrounding them can be accommodated in the interior space surrounded by the first base part 251 and the first side wall part 252 have.

Meanwhile, the first stopper 253 may be formed by bending outwardly from the upper end of at least one first side wall portion 252.

At this time, as shown in the figure, the first stoppers 253 are preferably disposed corresponding to the two first side wall portions 252 disposed on opposite sides, that is, facing each other, but are not limited thereto . The first stoppers 253 connected to the two first side wall portions 252 facing each other are preferably disposed at positions facing each other, but the present invention is not limited thereto. In addition, it is preferable that a plurality of first stoppers 253 are disposed corresponding to the first side wall portions 252, but the present invention is not limited thereto.

4 and 5, the outwardly protruding first stopper 253 is provided on the corresponding recessed portion 403 of the device frame 400, So as to prevent the liquid crystal display module 200 from flowing backward.

Therefore, in order to stably realize such a flow prevention function, it is preferable that the first stoppers 253 are disposed corresponding to the two first side wall portions 252 facing each other. That is, since the supporting force, that is, the flow preventing force acts on opposite sides opposite to each other, the flow prevention can be effectively performed.

When the first starters 253 connected to the two first side wall portions 252 facing each other are disposed at positions facing each other, since the first starters 253 are disposed symmetrically with respect to each other, The force can be made more uniform.

In addition, when a plurality of first stoppers 253 are disposed corresponding to the first side wall portions 252, the area of the first stoppers 253 as a whole increases, thereby improving the flow preventive force.

On the other hand, by combining the first stopper 253 of the bottom cover 250 and the concave groove 403 of the apparatus frame, the effect of restricting the flow of the liquid crystal display module 200 on the plane can also be realized . That is, as the first stopper 253 is inserted into the concave groove 403, the flow of the first stopper 253 on the plane becomes limited within the first stopper 253, The effect of restricting the flow on the plane can be exerted.

Meanwhile, the guide panel 230 may include a vertical portion 231, a seating end 232, and a second stopper 233.

The vertical portion 231 corresponds to one side of the liquid crystal panel 210 and may be disposed inside the first side wall portion 252 of the bottom cover 250. In this embodiment, four vertical portions 231 corresponding to four sides of the liquid crystal panel 210 are formed, and the vertical portions 231 are connected and connected to each other. Here, the vertical portion 231 may be disposed so as to be in close contact with the inner side surface of the first side portion 252.

The seating end 232 may be configured to protrude inward from the inner surface of the guide panel 230, that is, the inner surface of the vertical portion 231. The seating end 232 may be provided with an edge So that it can be supported. At this time, the liquid crystal panel 210 may be attached to the upper surface of the seating end 232 through the third adhesive member 503 and fixedly coupled to the guide panel 230, And a fixing force of the fixing member is applied. Here, as the third adhesive member 503, a double-sided adhesive tape may be used, but the present invention is not limited thereto.

The second stopper 233 may be bent outward at the upper end of the guide panel 230, that is, at the upper end of the vertical portion 231, The second starter 233 may be configured to be in close contact with the first starter 253 at the lower end thereof in correspondence with the first starter 253.

That is, it is preferable that the second starter 233 is connected to each of the two vertically opposed parts 231 of the guide panel 230, but the present invention is not limited thereto. At this time, the two vertical portions 231 facing each other are, for example, two vertical portions 231 located on opposite sides of the long axis direction of the electronic device 100 as shown in Fig.

The second stoppers 233 connected to the two vertical portions 231 facing each other are preferably disposed at positions facing each other, but the present invention is not limited thereto. In addition, it is preferable that a plurality of second stoppers 233 are disposed corresponding to the respective second vertical portions 231, but the present invention is not limited thereto.

The use of the second starter 233 disposed in substantially the same configuration as the first starter 253 can further improve the flow prevention effect of the liquid crystal display module 200.

In other words, when the double star structure composed of the first and second starters 253 and 233 is used, the thickness of the starter structure is increased to increase the flow preventing force, do.

In this case, the first stopper 253 of the bottom cover 250 prevents the second stopper 233 from being installed in the guide panel 230. In this case, The effect can be maintained.

Referring to the cover glass 300, the cover glass 300 may include a touch element that performs a touch sensing function. For example, a touch element may be formed on the back surface of the cover glass 300. As described above, by using the cover glass 300 provided with the touch device, the touch function can be implemented in the electronic device 100.

The cover glass 300 may be attached to the display surface of the liquid crystal panel 210 through the first adhesive member 501. Here, the first adhesive member 501 may be an optically clear resin (OCR), an optically clear adhesive (OCA), or the like, but is not limited thereto.

The cover glass 300 has a wider area than the liquid crystal panel 210, and covers the entire liquid crystal panel 210, and protrudes outward from the liquid crystal panel 210 when viewed in a plan view. In this way, the cover glass 300 is formed in front of the liquid crystal panel 210, so that the cover glass 300 can also protect the front surface of the liquid crystal panel 210.

As another example, a touch element may be provided in the liquid crystal panel 210 without being provided in the cover glass 300. [ In this case, the cover glass 300 is attached to the liquid crystal panel 210 through the first adhesive member 501, and the touch device may be provided to the liquid crystal panel 210, for example, Or may be configured on the display surface of the liquid crystal panel 210.

The apparatus frame 400 includes a cover glass 300 and a machine frame 300 that houses the LCD module 200 having the cover glass 300 attached thereto. 400 can be combined at the front so that the modularized electronic device 100 can be implemented.

In order to prevent a white spot phenomenon, the bottom surface of the LCD module 200, that is, the bottom surface of the bottom cover 250 is spaced apart from the bottom surface of the apparatus frame 400 by a predetermined distance, Is defined. That is, when the device frame 400 and the lower portion of the liquid crystal display module 200 are in close contact with each other, an impact is transmitted to the backlight unit 220 through the lower portion of the LCD module 200, The bottom cover 250 and the device frame 400 are spaced apart from each other.

Such a device frame 400 may include a second base 401 and a second sidewall 402.

The second base portion 401 is opposed to the rear of the first base portion 251 of the bottom cover 250 with a predetermined gap therebetween.

The second side wall portion 402 may be configured to face the first side wall portion 252 at a predetermined distance apart from the first side wall portion 252 of the bottom cover 250. The second sidewall 402 may be bent vertically upward from the edges of the second base 401. In this embodiment, four second sidewall portions 402 bent upward are formed in each of four sides. In this case, the adjacent second sidewall portions 402 are connected to each other to form a continuous structure .

The liquid crystal display module 200 is accommodated in the inside space surrounded by the second base 401 and the second side wall 402 so that the device frame 400 is substantially housed in the liquid crystal display module 200 As shown in Fig.

With respect to the apparatus frame 402 configured as described above, the cover glass 300 can be attached to the upper surface of the second side wall portion 402 through the second adhesive member 502 at the edge portion. Accordingly, the liquid crystal display module 200 with the cover glass 300 attached thereto can be coupled to the device frame 402 to be modularized.

Particularly, in this embodiment, the concave groove 403 corresponding to the first and second stoppers 253 and 233 may be formed in the second side wall portion 402.

The concave groove 403 is recessed rearward from the upper end of the inner side of the second side wall portion 402 and has a shape in which the upper end of the inner side portion is recessed from the inner side to the inner side of the second side wall portion 402 And a stepped structure is formed on the inner side of the second side wall portion 402 by the concave groove 403.

The first and second stoppers 253 and 233 are inserted into the concave groove 403 to be seated on the bottom surface of the concave groove 403 (that is, the top surface of the second sidewall portion 402 under the concave portion 403) . The first and second stoppers 253 and 233 are received in the recessed groove 403 and are seated so that the bottom cover 250 for modularizing the LCD module 200 and the guide panel 230 are fixed to the apparatus frame 402, A support structure that spans the substrate is realized.

Such a support structure corresponds to a rear flow prevention structure that functions to prevent the liquid crystal display module 200 from flowing backward.

That is, since the stapler structure of the liquid crystal display module 200 is seated in the recessed groove 403 recessed to the rear of the device frame 402, the liquid crystal display module 200 is supported with the upward supporting force So that the liquid crystal display module 200 is prevented from flowing backward.

In addition, even if an external force acts on the device frame 400, the external force is dispersed and transferred in a stapler structure through the second side wall portion 402 of the device frame 400, so that the transferred external force Acting on the liquid crystal display device module 200, it is possible to improve the downward flow prevention effect.

Accordingly, even if an external impact is generated, a force in the same direction as the upward external force of the cover glass 300 acts on the liquid crystal panel 210 of the liquid crystal display module 200, So that the bubbles can be prevented from entering the gap between the adhesive member 501 and the cover glass 300 or the liquid crystal panel 210 at the edges.

In this regard, referring to FIG. 6, an external force is generated by an external impact in a drop test (that is, a test for causing the short side of the electronic device 100 to collide with the paper surface) to the electronic device 100 , The upper supporting force due to the stamper structure and the upward external force dispersed and introduced through the stamper structure act on the liquid crystal display module 200. This upward force acts on the liquid crystal panel 210 do.

Even if the upward force acting on the cover glass 300 is generated by the external force transmitted through the apparatus frame 400, the liquid crystal panel 210 is also moved upward The adhesive force of the first adhesive member 501 between the liquid crystal panel 210 and the cover glass 300 can be prevented from being lowered.

Therefore, it is possible to prevent the gap between the first adhesive member 501 and the liquid crystal panel 210 or the cover glass 300 from being generated, and to prevent the inflow of air bubbles into the space between the liquid crystal panel 210 and the cover glass 300 do. As a result, the defect rate of the product can be reduced and the product cost can be reduced.

As described above, according to the embodiment of the present invention, a recess is formed in the device frame and a starter structure is formed in the recess in the LCD module.

The embodiment of the present invention described above is an example of the present invention, and variations are possible within the spirit of the present invention. Accordingly, the invention includes modifications of the invention within the scope of the appended claims and equivalents thereof.

100: electronic device 200: liquid crystal display device module
210: liquid crystal panel 212: first substrate
214: second substrate 220: backlight unit
221: optical sheet 223: light guide plate
225: reflector 229: LED assembly
229a: LED 229b: PCB
230: guide panel 231: vertical part
232: seat 233: second stopper
250: bottom cover 251: first base
252: first side wall portion 253: first stopper
300: cover glass 400: machine frame
401: second base portion 402: second side wall portion
403: Needle groove 501: first bonding member
502: second adhesive member 503: third adhesive member

Claims

A liquid crystal display (LCD) module including a liquid crystal panel, a backlight unit disposed behind the liquid crystal panel, and a bottom cover having the liquid crystal panel and the backlight unit and having a first sidewall;
A cover glass attached to a display surface of the liquid crystal panel;
An apparatus frame having an inner space in which the liquid crystal display module is housed and a second side wall portion to which an edge portion of the cover glass is attached;
A first starter bent outward at an upper end of the first side wall portion;
And a recessed portion that is recessed downward from an upper end of the second side wall portion and on which the first starter is seated,
And a liquid crystal display device.

The method according to claim 1,
Wherein the liquid crystal display module includes a guide panel to which an edge of the liquid crystal panel is attached,
The guide panel includes a second stopper that is bent outwardly from the top and is in close contact with the first stopper
An electronic apparatus having a liquid crystal display device.

The method according to claim 1,
Wherein the first starter comprises at least one corresponding to each of the first sidewall portions disposed opposite to each other
An electronic apparatus having a liquid crystal display device.

The method according to claim 1,
Wherein the bottom cover has a first base portion on which the backlight unit is seated, the apparatus frame having a second base portion spaced apart from the first base portion and positioned rearward
An electronic apparatus having a liquid crystal display device.

A liquid crystal panel;
A backlight unit disposed behind the liquid crystal panel;
A bottom cover accommodating the liquid crystal panel and the backlight unit and including a first side wall part;
A cover glass attached to a display surface of the liquid crystal panel;
And a first stopper bent outward from an upper end of the first side wall portion
And the liquid crystal display device.

6. The method of claim 5,
And a guide panel to which a rear edge of the liquid crystal panel is attached,
The guide panel includes a second stopper that is bent outwardly from the top and is in close contact with the first stopper
Liquid crystal display device.

6. The method of claim 5,
Wherein the first starter comprises at least one corresponding to each of the first sidewall portions disposed opposite to each other
Liquid crystal display device.