KR101656653B1 - Liquid crystal display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display device capable of preventing screen failure due to touch pressure and preventing breakage due to an external impact.
A liquid crystal display according to an embodiment of the present invention includes a liquid crystal panel, a backlight unit for supplying light to the liquid crystal panel, a cover bottom for mounting the backlight unit and the liquid crystal panel, a driving circuit unit for driving the light source of the liquid crystal panel and the backlight unit, A cover frame, a liquid crystal panel, a set frame for mounting the driving circuit and the window glass, and a foam bumper disposed between the cover bottom and the set frame. Further, the bumper of the liquid crystal display device according to the embodiment of the present invention includes a plurality of bump patterns arranged under the region where the liquid crystal panel is arranged.
The liquid crystal display device according to the embodiment of the present invention can prevent a screen failure due to a touch pressure and prevent damage or damage caused by an external impact.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display device capable of preventing screen failure due to touch pressure and preventing breakage due to an external impact.

As mobile electronic devices such as mobile communication terminals and notebook computers are developed, there is an increasing demand for flat panel display devices applicable thereto.

Of the flat panel display devices, liquid crystal display devices are classified into monitors such as industrial terminals, notebook computers, game machines and the like due to advantages of mass production technology, ease of driving means, high image quality, low power consumption and large screen realization. A portable terminal such as a mobile phone, MP3, PDA, PMP, PSP, portable game machine, DMB receiver and the like; And appliances such as refrigerators, microwave ovens, and washing machines.

1 is a view schematically showing a conventional liquid crystal display device.

1, a liquid crystal display 10 includes a liquid crystal panel 1, a backlight unit 2, and a window glass 3 in the prior art. In Fig. 1, the illustration of the set frame and the driving circuit is omitted.

In the liquid crystal panel 1, a liquid crystal layer is interposed in a cell gap between an upper substrate and a lower substrate. An image is displayed by adjusting the light transmittance for each of red, green and blue pixels according to a video signal applied to the thin film transistors TFT arranged in a matrix form.

Since the liquid crystal panel 1 does not generate self-luminescence, a light source that generates light is required. The backlight unit 2 is for supplying uniform light to the liquid crystal panel 1 and includes a light source for generating light, a light guide plate, and a plurality of optical sheets.

The backlight unit 2 may be divided into an edge type and a direct type according to the arrangement of light sources for supplying light to the liquid crystal panel 1. [ In the direct type, a light source is arranged on the back surface of the liquid crystal panel 1 to supply light. On the other hand, the edge type arranges the light sources in the lateral direction of the liquid crystal panel 1 to supply light. The circle may be a CCFL (Cold Cathode Fluorescent Lamp), an EEFL (External Electrode Fluorescent Lamp), or an LED (Light Emitting Diode).

The window glass 3 is disposed at the uppermost end of the liquid crystal display device to protect the liquid crystal panel 2 from an external impact.

FIGS. 2 and 3 are views showing a problem that a screen failure occurs due to a pressure due to a touch.

2 and 3, a touch screen capable of inputting information directly to a screen by a user using a finger or a pen has been applied as an input device of a mobile device to which a liquid crystal display device is applied.

When the screen is touched with a finger, the liquid crystal panel 1 is deflected by the pressure, the liquid crystal flows, and screen defects 11 such as screen shake and luminance change occur at the edge of the screen.

In recent years, it has been generalized that a touch screen is applied to a mobile device and a liquid crystal display device capable of preventing a screen failure due to a touch pressure due to frequent touches is required.

In addition, when a high pressure is applied to the screen, not only the screen defect 11 but also the liquid crystal display device may be damaged, so that a liquid crystal display device capable of preventing breakage or damages due to an external impact is demanded.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a technical object of the present invention to provide a liquid crystal display device capable of preventing a screen failure due to a touch pressure.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a liquid crystal display device capable of preventing breakage due to an external impact or reducing damage.

Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims.

A liquid crystal display according to an embodiment of the present invention includes a liquid crystal panel, a backlight unit for supplying light to the liquid crystal panel, a cover bottom for mounting the backlight unit and the liquid crystal panel, a driving circuit unit for driving the light source of the liquid crystal panel and the backlight unit, A cover frame, a liquid crystal panel, a set frame for mounting the driving circuit and the window glass, and a foam bumper disposed between the cover bottom and the set frame.
The bumper of the liquid crystal display device according to the embodiment of the present invention includes a plurality of bump patterns disposed under the region where the liquid crystal panel is disposed.

The liquid crystal display device according to the embodiment of the present invention can prevent a screen failure due to the touch pressure.

The liquid crystal display device according to the embodiment of the present invention can prevent damage or damage due to an external impact.

In addition, other features and advantages of the present invention may be newly understood through embodiments of the present invention.

1 is a view schematically showing a conventional liquid crystal display device.
FIGS. 2 and 3 are views showing a problem that a screen failure occurs due to a pressure due to a touch.
4 is a view illustrating a liquid crystal display device according to an embodiment of the present invention.
5 is a view showing a bumper of a liquid crystal display device according to an embodiment of the present invention.
6 and 7 are views showing bumpers according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In the case where the word 'includes', 'having', 'done', etc. are used in this specification, other parts can be added unless '~ only' is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The term " at least one " should be understood to include all possible combinations from one or more related items. For example, the meaning of 'at least one of the first item, the second item and the third item' means not only the first item, the second item or the third item, but also the second item, the second item and the third item, Means any combination of items that can be presented from more than one.

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

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

Prior to the detailed description with reference to the drawings, the liquid crystal display device may include a twisted nematic (TN) mode, a VA (Vertical Alignment) mode, an IPS (In Plane Switching) mode, a FFS (Fringe Field Switching) Mode and so on. The liquid crystal display according to the embodiment of the present invention can be applied to both the TN mode, the VA mode, the IPS mode, and the FFS mode.

Hereinafter, a liquid crystal display according to an embodiment of the present invention, which can prevent screen failure due to touch pressure and prevent breakage due to an external impact, will be described with reference to the accompanying drawings.

4 is a view illustrating a liquid crystal display device according to an embodiment of the present invention.

4, a liquid crystal display 100 according to an exemplary embodiment of the present invention includes a reflective sheet 130, a backlight unit 140, a liquid crystal panel 150, and a liquid crystal panel 150 mounted in a cover bottom 120 A set frame 170 for mounting a cover bottom 150 and a printed circuit board 180 and a frame 170 for mounting a set PCB 180 between the cover bottom 120 and the set frame 170 And a bumper (110) disposed to the shock absorber to buffer the shock.

The liquid crystal panel 150 includes a color filter array substrate (upper substrate), a TFT array substrate (lower substrate), and a liquid crystal layer interposed between the two substrates. In the liquid crystal panel 150, red, green, and blue pixels for displaying an image are arranged in a matrix form. The TFT array substrate and the color filter array substrate are sealed and sealed by a sealant. A lower polarizing film (POL) is disposed below the TFT array substrate, and an upper polarizing film (POL) is disposed above the color filter array substrate.

A window glass 190 is disposed on the liquid crystal panel 150 to protect the liquid crystal panel 150 from external factors and the liquid crystal panel 150 and the window glass 190 are bonded by a transparent adhesive layer 160 have.

Since the liquid crystal panel 150 does not generate self-luminescence, it needs a light source for supplying light and transmits light through a backlight unit 140 including a light source disposed on a side surface or a back surface of the liquid crystal panel 150 .

The backlight unit 140 includes a plurality of LEDs, a light guide plate 142, and a plurality of optical sheets 146 that generate light. FIG. 4 shows an edge type backlight unit to which an LED (Light Emitting Diode) is applied as a light source.

The light guide plate 142 guides the light incident from the plurality of LEDs through the side surface in the front direction of the liquid crystal panel 150. The plurality of optical sheets 146 are arranged on the light guide plate 142 to enhance the brightness and uniformity of the light supplied to the liquid crystal panel 150 and the quality of the displayed image. The plurality of optical sheets 146 may be composed of a diffusion sheet and a prism sheet. A plurality of LEDs are embedded in the LED housing 144 in the form of a module, and the LED housing 144 is disposed on the side of the light guide plate 142. A reflection sheet 130 is disposed under the light guide plate 142 to reflect light toward the lower side of the light guide plate 142 toward the liquid crystal panel 150.

The cover bottom 120 has a bottom surface and a bent surface from the bottom surface. The backlight unit 140 and the liquid crystal panel 150 are mounted on the inner space of the cover bottom 120.

A set PCB 180 on which a driving circuit for driving the light sources of the liquid crystal panel 150 and the backlight unit 140 is mounted is disposed below the cover bottom 120.

A set frame 170 is formed so as to surround the cover bottom 120, the set PCB 180, and the window glass 190. The set frame 170 is formed with a concave portion, and the set PCB 180 is disposed in the concave portion of the set frame 170.

Since a touch screen is applied to a liquid crystal display device, a screen touch is frequently performed and a shock may be applied to the liquid crystal display device from the outside, resulting in a screen abnormality or breakage.

The liquid crystal display device of the present invention is provided with a bumper 110 between the cover bottom 120 and the set frame 170 so as to prevent screen failure due to touch pressure and to prevent breakage due to an external impact.

Specifically, the bumper 110 includes an adhesive surface, and the adhesive surface of the bumper 110 is attached to the back surface of the cover bottom 120. The bumper 110 is disposed on the set PCB 180 embedded in the set frame 170 and the bumper 110 is disposed on the set PCB 180 without a gap.

As another example, both sides of the bumper 110 may be formed as adhesive surfaces, the first side may be attached to the back side of the cover bottom 120, and the second side may be attached to the upper side of the set PCB 180.

The bumper (110) is formed to have a predetermined thickness of foam material so as to buffer the shock applied from the upper side and the lower side.

5 is a view showing a bumper of a liquid crystal display device according to an embodiment of the present invention.

Referring to FIG. 5, the bumper 110 is formed of a plurality of bump patterns 112, and the plurality of bump patterns 112 have a bar shape. The plurality of bump patterns 112 may be arranged in the longitudinal direction from the upper side to the lower side of the back surface of the cover bottom 120.

Each of the plurality of bump patterns 112 may be formed to have a length of 68 mm and a width of 9 mm, and the plurality of bump patterns 112 may be disposed at intervals of 1 mm.

However, the present invention is not limited thereto, and as shown in Table 1 below, each of the plurality of bump patterns 112 may be formed to have a length of 68 to 80 mm and a width of 9 to 10 mm, ) May be arranged at intervals of 1 to 2 mm.

5, the number of the bump patterns 112 is not limited. However, the number of the bump patterns 112 is reduced according to the screen size of the liquid crystal display device, Or increased.

As described above, the bumper 110 is formed between the back surface of the cover bottom 120 and the upper surface of the bottom surface of the set frame 170, so that the pressure applied when touching the screen of the liquid crystal display device can be buffered. Further, the pressure applied under the set frame 170 through the bumper 110 can be buffered. Therefore, it is possible to prevent a screen failure due to the touch pressure, and to prevent the liquid crystal display device from being damaged by an external impact.

6 is a view showing bumpers according to another embodiment of the present invention.

6A, the bumper 110 is formed of a plurality of bump patterns 112, and a plurality of bump patterns 112 may be arranged in the longitudinal direction from the upper side to the lower side of the back surface of the cover bottom 120.

As shown in Table 2 below, each of the plurality of bump patterns 112 may be formed to have a length of 68 to 80 mm and a width of 2 to 3 mm, and the plurality of bump patterns 112 may have a width of 6 to 7 mm Respectively.

The number of the bump patterns 112 is not limited and the number of the bump patterns 112 is reduced according to the screen size of the liquid crystal display device Or increased.

6B, the bumper 110 is formed of a plurality of bump patterns 112, and a plurality of bump patterns 112 may be arranged in a lateral direction from the left side to the right side of the back surface of the cover bottom 120.

Each of the plurality of bump patterns 112 may be formed to have a length of 50 to 60 mm and a width of 2 to 3 mm, and the plurality of bump patterns 112 may be formed to have a width of 2 to 4 mm Respectively.

The number of the bump patterns 112 is not limited and the number of the bump patterns 112 is reduced in accordance with the screen size of the liquid crystal display device Or increased.

6C, the bumper 110 is formed of a plurality of bump patterns 112, and a plurality of bump patterns 112 may be arranged in an 'X' shape on the left side of the back surface of the cover bottom 120 .

As shown in Table 4 below, each of the plurality of bump patterns 112 may be formed to have a length of 90 to 110 mm and a width of 2 to 5 mm.

6C, one X-shaped bumper 110 is disposed on the rear surface of the cover bottom 120, but a plurality of bumpers 110 having an X-shaped configuration are disposed on the back surface of the cover bottom 120 .

7 is a view showing bumpers according to another embodiment of the present invention.

Referring to FIG. 7A, the bumper 110 may be disposed in a square shape at the edge of the back surface of the cover bottom 120.

As shown in Table 5 below, the longitudinal sides of the bumper 110 are formed to have a length of 68 to 80 mm, the lateral sides have a length of 50 to 60 mm, And may have a width of 4 mm.

A plurality of bumpers 110 having a quadrangle shape are provided on the cover bottom 120 and the bumper 110 having a rectangular shape is disposed on the bottom surface of the cover bottom 120. However, As shown in FIG. The bumper 110 may be formed not only in a square shape but also in a triangle shape, a rhombus shape, a star shape, or a polygonal shape larger than a pentagon.

7B, the bumper 110 is formed of a plurality of bump patterns 112, and a plurality of bump patterns 112 may be arranged in the lateral direction from the left side to the right side of the back surface of the cover bottom 120.

Each of the plurality of bump patterns 112 may be formed to have a length of 50 to 60 mm and a width of 9 to 12 mm, and the plurality of bump patterns 112 may be formed to have a width of 2 to 5 mm Respectively.

The number of the bump patterns 112 is not limited and the number of the bump patterns 112 is reduced according to the screen size of the liquid crystal display device Or increased.

Referring to FIG. 7C, the bumper 110 may be disposed on the rear surface of the cover bottom 120 in a beehive or mesh form.

As shown in Table 7 below, the bumper 110 may be formed to have a width of 2 to 5 mm.

When the bumpers 110 shown in Figs. 6A to 6C and Figs. 7A and 7C are disposed between the back surface of the cover bottom 120 and the upper surface of the bottom surface of the set frame 170 and a touch is made on the screen of the liquid crystal display It is possible to buffer the applied pressure. Further, the pressure applied under the set frame 170 through the bumper 110 can be buffered. Therefore, it is possible to prevent a screen failure due to the touch pressure, and to prevent the liquid crystal display device from being damaged by an external impact.

It will be understood by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: liquid crystal display
110: Bumper
112: bump pattern
120: Cover Bottom
130: reflective sheet
140: Backlight unit
150: liquid crystal panel
170: set frame
180: set PCB
190: Window glass

Claims (8)

A liquid crystal panel;
A backlight unit for supplying light to the liquid crystal panel;
A cover bottom for mounting the backlight unit and the liquid crystal panel;
A driving circuit for driving the light sources of the liquid crystal panel and the backlight unit;
A window glass disposed on an upper portion of the liquid crystal panel;
A set frame for mounting the cover bottom, the liquid crystal panel, the driving circuit, and the window glass; And
And a bumper of a foam material disposed between the cover bottom and the set frame,
The bumper includes a plurality of bump patterns disposed under the region where the liquid crystal panel is disposed,
Wherein the plurality of bump patterns have a bar shape and are arranged in the vertical direction from the upper side to the lower side of the back surface of the cover bottom,
Wherein each of the plurality of bump patterns has a length of 68 to 80 mm and a width of 9 to 10 mm, and the plurality of bump patterns are disposed with an interval of 1 to 2 mm. The method according to claim 1,
Wherein the bumper is disposed between the cover bottom and the drive circuit portion,
And the bumper is attached to the back surface of the cover bottom. The method according to claim 1,
Wherein the bumper is disposed between the cover bottom and the drive circuit portion,
And the bumper is attached to the upper surface of the driving circuit portion. delete delete delete delete The method according to claim 1,
Wherein the bumper is arranged in the shape of a polygon, a honeycomb, or a mesh of X, triangle, square, star, pentagon or more.

Images