KR101763308B1 - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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Publication number
KR101763308B1
KR101763308B1 KR1020150180669A KR20150180669A KR101763308B1 KR 101763308 B1 KR101763308 B1 KR 101763308B1 KR 1020150180669 A KR1020150180669 A KR 1020150180669A KR 20150180669 A KR20150180669 A KR 20150180669A KR 101763308 B1 KR101763308 B1 KR 101763308B1
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South Korea
Prior art keywords
panel
liquid crystal
crystal display
screw
cover bottom
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KR1020150180669A
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Korean (ko)
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KR20170072477A (en
Inventor
박은수
전기범
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(주)뉴옵틱스
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Priority to KR1020150180669A priority Critical patent/KR101763308B1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F2001/133325—

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

A liquid crystal display device comprising: a panel fix which is made of a metal material and supports a lower end of the liquid crystal display panel and covers a side surface of the liquid crystal display panel; a cover bottom covering the rear surface of the liquid crystal display panel; And a fastening means for joining the bottom and the panel picker. By providing a panel picker to secure the fastening force of the screw coupling the panel fixer and the cover bottom, and preventing the screw and the panel from contacting each other, It is possible to prevent color unevenness and light leakage phenomenon on the black screen.

Description

[0001] LIQUID CRYSTAL DISPLAY [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device that secures a fastening force of a screw that joins a panel guide and a cover bottom in order to reduce the thickness of a liquid crystal display device.

A liquid crystal display device is a device for displaying image data by adjusting a passing amount of light using a characteristic that the arrangement state of liquid crystal molecules is changed according to an applied voltage.

Such a liquid crystal display device is classified into a simple matrix type and an active matrix type according to a liquid crystal display matrix.

In the simple mattress method, an active element such as a transistor is attached to a glass substrate itself, which is excellent in performance but has a complicated process and difficulty in enlargement.

In the active matrix method, one transistor for controlling the voltage is connected to one liquid crystal dot, and the transistor is used for the type of the transistor because the contrast is strong and the smear does not occur.

As the performance of such an active matrix type liquid crystal display device rapidly develops, it has been widely used in flat panel TV, portable computer, monitor, and the like.

In the twisted nematic (TN) type of active matrix liquid crystal display device, electrodes are arranged on two substrates, liquid crystal directors are arranged so as to be twisted by 90 °, and voltage is applied to electrodes to drive the liquid crystal directors.

In the IPS mode (In-Plane Switching Mode), two electrodes are formed on a single substrate, and a liquid crystal field director is controlled by a transverse electric field generated between the two electrodes.

This IPS mode method is developed to improve the narrow view angle and low chromaticity expressing power which are disadvantage of the TN mode, and has an advantage that the shape is not changed even when the liquid crystal is pressed by arranging the electrodes horizontally, and the viewing angle is very wide.

On the other hand, the liquid crystals sandwiched between the substrates are arranged in an initial arrangement according to the alignment direction of the alignment film provided on the substrate, and when the electric field is applied, the alignment direction is changed in accordance with the electric field direction to control the amount of light transmitted.

However, when the initial arrangement state of the liquid crystal is changed by various factors, light leakage occurs in the liquid crystal display panel.

For example, when the alignment film is damaged by the column spacer, the liquid crystal is not aligned in the desired direction at the portion where the alignment film is damaged, so light leakage occurs at this portion.

Examples of technologies for preventing light leakage generated in such a liquid crystal display panel are disclosed in Patent Documents 1 and 2 below.

Meanwhile, in addition to the occurrence of defects of the liquid crystal display panel (hereinafter referred to as 'panel'), light leakage occurs even when the panel is bent due to mechanical defects in the process of modularizing the panel.

That is, the cover bottom is combined with the top case with the panel and the backlight unit therebetween to modularize them.

In this process, when there is a difference in bonding force applied to the panel, the panel is warped, and light leakage may occur in the panel.

For example, FIG. 1 is a partially enlarged cross-sectional view showing a modular structure of a conventional liquid crystal display device.

1, a liquid crystal module according to the related art has a structure in which a reflective sheet 2, a light guide plate 3 and an optical sheet 4 are seated on an upper portion of a cover bottom 1, Shaped panel guide 5 to be brought into contact with the outer surface and the upper surface of the bottom 1 and then fastening the case top 6.

Here, a pad 8 is attached to the top surface of the support arm of the panel guide 5 and the inside of the case top 6 to protect the panel 7 from damage.

Generally, the pad 8 is made of a material made of silicone or polyolefin.

Korean Patent Publication No. 10-2013-0020473 (published on Feb. 27, 2013) Korean Patent Registration No. 10-1367042 (Announcement on February 25, 2014)

On the other hand, in recent years, a technique for reducing the thickness of a liquid crystal display device to a slim size has been developed.

However, in order to stably fix the panel guide and the cover bottom, the screws for fixing the panel guide and the cover bottom must be thick enough to exert their fastening force.

However, when the thickness of the panel guide and the cover bottom is reduced in order to minimize the thickness of the liquid crystal display device, it is difficult to secure the fastening force of the screw.

As a result, there has been a problem that a light leakage phenomenon occurs in a portion where the fastening force between the panel guide and the cover bottom is weakened in the liquid crystal display module according to the related art.

Accordingly, in the past, when it is difficult to fasten a screw due to a reduction in the thickness of the panel guide and the cover bottom, the panel guide and the cover bottom are joined by a bonding method using an adhesive. In this case, There was a problem.

In addition, in the liquid crystal display module according to the related art, there is a problem that light leakage occurs when the panel 7 is touched and constrained by its own weight due to its own weight when the monitor, which is a user environment, is driven vertically.

Particularly, in the case of a liquid crystal display device used by a professional worker, an excellent contrast ratio is emphasized.

For example, when used as a medical monitor, when reading medical image data such as X-ray or computed tomography, the backlight unit (BLU) is read in step 0 in 256 gray scales , There is a problem that it is difficult to accurately determine the state of a patient when unevenness of color tone and light leakage phenomenon occur on a black screen.

An object of the present invention is to provide a liquid crystal display device which is slimly manufactured by minimizing the thickness of a panel guide and a cover bottom.

It is another object of the present invention to provide a liquid crystal display device capable of securing a fastening force of a screw coupled between a panel guide and a cover bottom.

It is still another object of the present invention to provide a liquid crystal display device which can simplify the structure of the housing of the liquid crystal display device and minimize the work process time and the working time.

In order to achieve the above object, a liquid crystal display device according to the present invention includes a panel fixer for supporting a lower end of a liquid crystal display panel in a light input / output part, And the fixer and the cover bottom are combined.

The present invention provides a liquid crystal display panel comprising a panel finder made of a metal material and supporting a lower end of the liquid crystal display panel and covering a side surface of the liquid crystal display panel, a cover bottom covering the rear surface of the liquid crystal display panel, And engaging means for engaging the picker.

Wherein the panel fixer includes a body formed in a rectangular shape with one side open and a support member formed to have a predetermined width so as to support an edge of the panel on the inner surfaces of the upper and lower right and left side walls of the body, And a space in which the liquid crystal display panel is inserted is formed between the members.

Wherein the fastening means includes a screw coupled to the support member in an insert manner and a nut passing through the cover bottom and fastened to the screw, wherein the screw is attached to the support member to prevent interference with the liquid crystal display panel Is provided with a screw which does not have a screw hole.

The support member extends horizontally along the longitudinal direction of the body on the inner surface of the body, and the support member is formed with an engagement hole through which the screw is inserted in an insert manner.

Wherein the nut includes a body formed in a cylindrical shape to be fastened to the screw through a through hole formed in the cover bottom, and a flange formed at a lower end of the body and having a diameter larger than a diameter of the body, And a tool groove is formed on the lower surface of the nut so as to rotate the nut.

The liquid crystal display panel is coupled to the panel fix in a state that the liquid crystal display panel is disposed under the panel fix, and the nut is fastened to the tip end of the screw inserted in the through hole at the upper part of the cover bottom.

As described above, according to the liquid crystal display device of the present invention, it is possible to secure the fastening force of the screw for coupling the panel fixer and the cover bottom by applying the panel fixer, prevent the screw and the panel from contacting each other, It is possible to prevent color unevenness and light leakage phenomenon on the black screen.

Particularly, according to the present invention, it is not necessary to carry out an inversion process in the assembling process of the liquid crystal display device by connecting the nut to the cover bottom and connecting the nut and the screw coupled to the support member in an insert manner, Can be reduced, and the effect of securing the assembly stability can be obtained.

According to the present invention, both the functions of the panel guide and the side frame for forming the appearance of the product can be performed by using the panel picker.

In other words, according to the present invention, by covering the side surface of the liquid crystal display panel using the panel fixer, the housing structure of the liquid crystal display device can be simplified, and the number of components can be reduced to minimize the manufacturing cost and the manufacturing process Loses.

Further, according to the present invention, it is possible to easily disassemble the cover bottom and the panel picker by releasing the fastening of the screw and the nut provided as the fastening means. Therefore, when the panel guide and the cover bottom are joined by the bonding method, The effect that the problem can be solved can be obtained.

1 is a partially enlarged sectional view showing a modular structure of a conventional liquid crystal display device,
2 is a partially enlarged cross-sectional view of a liquid crystal display device according to a preferred embodiment of the present invention,
3 is an exploded perspective view of the liquid crystal display shown in Fig.

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

In this embodiment, a case in which the present invention is applied to an IPS mode liquid crystal display device will be described. However, it should be noted that the present invention is not limited thereto and can be applied to various types of liquid crystal display devices.

Hereinafter, the direction toward the cover bottom centering on the panel in the liquid crystal display device will be referred to as " rear ", and the opposite direction will be referred to as " forward ".

In the following description, the terms 'left', 'right', 'above', and 'downward', which denote directions, are used to indicate respective directions about the states shown in the respective drawings.

FIG. 2 is a partially enlarged cross-sectional view of a liquid crystal display device according to a preferred embodiment of the present invention, and FIG. 3 is an exploded perspective view of the liquid crystal display device shown in FIG.

Fig. 2 is an enlarged cross-sectional view of a light-incoming portion of the liquid crystal display panel, and Fig. 3 is a partially broken-away view of the inverted light-incoming portion according to a modulating method of the liquid crystal display device.

In the liquid crystal display according to the preferred embodiment of the present invention, the panel guide for supporting the lower end of the liquid crystal display panel in the light input / output part is replaced by a panel picker made of a metal material having rigidity, And has a structure in which the panel picker and the cover bottom are combined using a screw.

Here, the carry-in / out part refers to a part where the light source array of the backlight unit is not disposed, and the position of the carry-in / out part can be changed depending on the position where the light source array of the backlight unit is arranged.

For example, when the light source array of the backlight unit is disposed at the lower end portion of the liquid crystal display device, the lower end portion of the liquid crystal display device is referred to as a light input portion, and the right and left portions and upper end portion of the liquid crystal display device are referred to as a carry-

2 and 3, the liquid crystal display 10 according to a preferred embodiment of the present invention includes a liquid crystal display panel 20 (hereinafter referred to as a panel) for displaying an image, A backlight unit (not shown) for irradiating light toward the rear surface of the panel 20, and a housing 30 having a panel 20 and a space in which the backlight unit is installed.

2 and 3, the liquid crystal display device 10 according to the preferred embodiment of the present invention may be replaced with a panel guide 5, which is manufactured by molding using silicon or a resin material, And a fastening means 50 for joining the panel bottom 32 with the cover bottom 33 provided in the housing 30 and the panel pick 32.

The panel 20 displays an image using light supplied from the backlight unit.

To this end, the panel 20 may include a thin film transistor substrate, a color filter substrate, and a liquid crystal layer disposed between the two substrates.

The thin film transistor substrate includes a gate line and a data line perpendicularly perpendicular to each other, and each line can apply an electric signal to the liquid crystal layer.

The liquid crystal layer is changed in arrangement according to an electrical signal applied through each line to selectively transmit light emitted from the backlight unit in units of pixels.

The color filter substrate colors the light transmitted through the liquid crystal layer to output an image.

Here, the thin film transistor substrate is connected to a panel driver (not shown) through a chip on film (COF) or a tape carrier package (TCP) provided with a drive IC and a printed circuit board And can be electrically connected to receive the control signal.

The backlight unit includes a light source array (not shown) installed on the rear side or both sides or the lower side of the panel 20 to supply light to the rear surface of the panel 20 so as to output an image from the panel 20, An optical sheet 41, a light guide plate 42, and a reflection sheet 43 for diffusing and reflecting the light emitted from the light source array and transmitting the light to the panel 20, a light source housing (not shown) . ≪ / RTI >

The optical sheet 41 may include a diffusion sheet for uniformly diffusing light output from the light guide plate 42 or the diffusion plate or a prism sheet for adjusting the light path to the panel 20 in the vertical direction.

When the light source array is installed on both sides or the lower side of the panel 20, the reflective sheet 43 reflects backward light of the light emitted from the light source toward the light guide plate 42 and the panel 20, The overall luminance of the liquid crystal display device 10 can be improved.

The housing 30 may include a panel fixture 32 having a front panel 20 mounted thereon and forming a front edge of the panel 20 and a cover bottom 33 covering the rear surface of the panel 20. [

The panel picker 32 includes a body 34 formed in a substantially rectangular box shape with one side opened and a body 34 formed on the inner surface of the upper, lower, right, and left side walls of the body 34 so as to have a substantially ' And a support member 35 formed to have a predetermined width to support the support member 35.

The panel picker 32 is mounted on the upper end of the cover bottom 33 by the support member 35 in a state of being horizontally disposed in the modularization process of the liquid crystal display device 10, It is possible to stably support the mounted panel 20.

For this purpose, unlike the panel guide 5, which is manufactured by a mold method using a conventional silicon or resin material, the panel picker 32 is made of a metal material which is light and rigid, such as aluminum, .

On the other hand, when the liquid crystal display device 10 is installed in a vertical state as a user environment, the lower end of the panel 20 can be supported on the upper surface of the lower end of the body 34.

The support member 35 extends horizontally along the longitudinal direction of the body 34 on the inner surface of the body 34. The support member 35 is provided with a screw 51 of the fastening means 50, The coupling holes 36 can be vertically penetrated.

The cover bottom 33 is formed in a substantially rectangular plate shape and covers the rear surface of the liquid crystal display device 10 and is accommodated in a space formed by the body 34 of the panel fixture 32 and the support member 35 .

The thickness between the lower surface of the cover bottom 33 and the upper surface of the support member 35 of the panel fixture 32 in this embodiment is smaller than the thickness of the lower surface of the cover bottom 1 of the general liquid crystal display panel, Is formed to be about 0.5 mm or more thinner than the thickness between the adjacent layers.

As a result, when the cover bottom 33 and the support member 35 are fastened using a general screw, the thread of the screw is fastened to the support member 35 at less than three times the limit fastening number, There arises a difficult problem.

In the case of using a general screw, when the tip of the screw comes into contact with the panel 20, stress is generated in the panel 20 due to external force, and unevenness of color tone and light leakage phenomenon occur on the black screen, The panel 20 may be damaged.

Therefore, in this embodiment, the screw 51 of the fastening means 50 is inserted into the support member 35 in an insert manner, the nut 52 is passed through the lower portion of the cover bottom 33, Conclude.

To this end, the cover bottom 33 may be provided with a through hole 37 through which the nut 52 of the fastening means 50 is inserted.

The fastening means 50 may include a screw 51 coupled to the support member 35 in an insert manner and a nut 52 threaded through the lower portion of the cover bottom 33 and fastened to the screw 51.

The screw 51 may be provided with a non-head screw to prevent interference with the panel 20 which is seated on the upper surface of the support member 35.

The nut 52 has a body 53 formed in a substantially cylindrical shape so that the nut 52 can be fastened to the screw 51 through a through hole 37 formed in the cover bottom 33, And a flange 54 formed in a disk shape having a larger diameter.

A tool groove 55 may be formed on the lower surface of the nut 52 to rotate the nut 52 using a tool such as a screwdriver.

Here, the step 38 may be formed on the inner circumferential surface of the through hole 37 so that the flange 54 of the nut 52 is caught.

Thus, in order to make the thickness of the liquid crystal display device slim, the present invention can provide a panel fixer made of a metal material instead of a conventional panel guide and can be manufactured by minimizing the thickness of the support members of the cover bottom and the panel fixer have.

According to the present invention, the panel fixer and the cover bottom can be stably coupled by inserting the screw into the support member of the panel fixer and screwing the nut to the screw at the bottom of the cover bottom.

3, the coupling relationship and the operation method of the liquid crystal display according to the preferred embodiment of the present invention will be described in detail.

3, the operator joins the panel picker 32 to the panel 20 in a state in which the panel 20 of the liquid crystal display device is inverted to be positioned at the bottom.

The panel fixture 32 is disposed on the upper portion of the panel 20 so that the panel 20 is inserted into the space defined by the body 34 of the panel fixture 32 and the upper surface of the support member 35, And the panel picker 32 is coupled to the panel 20. [ At this time, the panel 20 can be attached to the body 34 and the support member 35 of the panel fixture 32 in an adhesive manner.

On the other hand, the screws 51 are inserted into the support member 35 of the panel picker 32 in an insert manner.

The optical sheet 41, the light guide plate 42, and the reflection sheet 43 are sequentially arranged on the upper surface of the panel 20.

Subsequently, the cover bottom 33 is disposed on the upper portion of the panel fixture 32 and then moved downward to seat the cover bottom 33 on the upper surface of the support member 35 of the panel fixture 32.

At this time, the cover bottom 33 is inserted into the space formed by the body 34 of the panel picker 32 and the support member 35, and the upper end of the screw 51 inserted in the insert manner to the support member 35 Is inserted in the central portion of the through hole 37 formed in the cover bottom 33. As shown in Fig.

Finally, the operator inserts the nut 52 through the through hole 37 of the cover bottom 33 and inserts a tool such as a screwdriver into the tool groove 55 formed in the flange 54 of the nut 52 The nut 52 is rotated to fasten it with the screw 51.

As described above, according to the present invention, it is not necessary to carry out the inversion process in the assembling process of the liquid crystal display device by connecting the nut to the cover bottom and fastening the nut and the screw, so that the work process can be reduced, .

The present invention can perform both the function of the panel guide and the side frame that forms the appearance of the product using the panel fixer.

In other words, the present invention covers the side surface of the liquid crystal display panel using the panel fixer, thereby simplifying the housing structure of the liquid crystal display device and reducing the number of components, thereby minimizing the manufacturing cost and manufacturing process.

In addition, the present invention can solve the problem that reworking is impossible when the panel guide and the cover bottom are joined by the bonding method because the fastening force of the screw is not secured.

Through the above-described process, the present invention can secure a fastening force of a screw for coupling a panel fixer and a cover bottom by applying a panel fixer, prevent a screw and a panel from contacting each other, It is possible to prevent unevenness in color tone and light leakage phenomenon.

Although the invention made by the present inventors has been described concretely with the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

A panel fixer is used to secure a fastening force of a screw for coupling a panel fixer and a cover bottom to prevent a screw and a panel from coming into contact with each other to eliminate stress generated inside the panel, And the like.

10: liquid crystal display device 20: liquid crystal display panel
30: housing 32: panel fixer
33: Cover Bottom 34: Body
35: support member 36: engaging hole
37: through hole 38: step
41: optical sheet 42: light guide plate
43: reflective sheet 50: fastening means
51: screw 52: nut
53: body 54: flange
55: Tool groove

Claims (7)

A panel picker for supporting the lower end of the liquid crystal display panel, which is manufactured using a metal material in the light-entering /
A cover bottom covering the rear surface of the liquid crystal display panel,
And a fastening means for fastening the panel fixer to the cover bottom using a screw coupled to the panel fixture in an insert manner,
The panel picker includes a body formed in a rectangular frame shape having one side opened,
And a supporting member extending in a predetermined width along the longitudinal direction of the body so as to support the edges of the liquid crystal display panel on inner surfaces of upper, lower, right, and left side walls of the body,
A space for inserting the liquid crystal display panel is formed between upper, lower, right and left side walls of the body and the supporting member,
The fastening means comprises a screw which is inserted in an insert manner to the support member
And a nut penetrating through the cover bottom to be fastened to the screw,
Wherein the support member is formed with an engagement hole through which the screw is inserted in an insert manner toward the cover bottom,
Wherein the screw is provided with a headless screw to prevent interference with a liquid crystal display panel that is seated on the support member. delete delete delete delete The method according to claim 1,
The nut has a body formed into a cylindrical shape to be fastened to the screw through a through hole formed in the cover bottom
And a flange formed at a lower end of the body in a circular plate shape having a diameter larger than a diameter of the body,
And a tool groove is formed on a lower surface of the nut to rotate the nut. The method according to claim 6,
Wherein the liquid crystal display panel is coupled to the panel finder in a state of being disposed below the panel finder,
And the nut is fastened to the tip end of the screw inserted into the through hole at an upper portion of the cover bottom.
KR1020150180669A 2015-12-17 2015-12-17 Liquid crystal display KR101763308B1 (en)

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KR101763308B1 true KR101763308B1 (en) 2017-08-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3835854A1 (en) 2019-12-13 2021-06-16 New Optics Ltd. Liquid crystal display device
US11709386B2 (en) 2019-12-13 2023-07-25 New Optics, Ltd. Liquid crystal display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3835854A1 (en) 2019-12-13 2021-06-16 New Optics Ltd. Liquid crystal display device
KR20210075893A (en) 2019-12-13 2021-06-23 (주)뉴옵틱스 Liquid crystal display
US11709386B2 (en) 2019-12-13 2023-07-25 New Optics, Ltd. Liquid crystal display device

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