KR101800669B1 - Liquid crystal display devece - Google Patents

Abstract

The present invention relates to a liquid crystal display device having a light and thin shape and a narrow bezel, and a method of manufacturing the same.
A feature of the present invention is to form a camera lens hole and a speaker hole in a display area of a liquid crystal panel of a liquid crystal display device.
Accordingly, it is possible to provide a liquid crystal display device having a light weight, a thin shape, and a narrow bezel.

Description

[0001] Liquid crystal display device and manufacturing method thereof [0002]

The present invention relates to a liquid crystal display device having a light and thin shape and a narrow bezel, and a method of manufacturing the same.

In recent years, as the society has become a full-fledged information age, a display field for processing and displaying a large amount of information has rapidly developed, and various flat panel display devices have been developed in response to this.

Specific examples of such flat panel display devices include a liquid crystal display device (LCD), a plasma display panel (PDP), a field emission display (FED) And electroluminescence display device (ELD). These flat panel display devices are excellent in performance of thinning, light weight, and low power consumption, and are rapidly replacing existing cathode ray tubes (CRTs).

In particular, a liquid crystal display device is characterized in that it has a large contrast ratio, is suitable for moving picture display, and has low power consumption, and is utilized in various fields such as a notebook computer, a monitor, and a TV. And the liquid crystal has an optical anisotropy in which the molecular structure is thin and long and has a direction in the arrangement and a polarizing property in which the direction of the molecular arrangement is changed according to the size when the liquid crystal is placed in the electric field.

That is, a typical liquid crystal display device includes a liquid crystal panel in which a liquid crystal layer is interposed between first and second substrates having an array layer for liquid crystal driving and a color-filter layer for color implementation This is an essential component, which changes the alignment direction of the liquid crystal molecules with an internal electric field, thereby causing a difference in transmittance.

At this time, the difference in transmittance of the liquid crystal panel is displayed in the form of a color image by reflecting the color combination of the color filter through light of a back light placed on the back surface thereof.

On the other hand, in recent years, the liquid crystal display device has been actively applied not only to a TV or a monitor but also to personal portable electronic devices such as a mobile phone and a PDA, and a camera lens is installed in such a liquid crystal display device to realize functions of a camera phone and a video phone .

At this time, it is required that the liquid crystal display device is lightweight and thin, and the display area is wide and the bezel area, which is a non-display area other than the display area, is formed as small as possible.

However, in the case of a liquid crystal display device including a camera lens, a hole is formed in a case for assembling and fastening the liquid crystal panel and the backlight, and a camera lens is inserted into the hole, thereby increasing the thickness of the case .

This makes it impossible to implement the narrow bezel that is recently required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal display device having a lightweight, thin and narrow bezel.

According to an aspect of the present invention, there is provided a display device including a first substrate on which a display region including a plurality of pixels and a non-display region surrounding the display region are formed, a color filter A liquid crystal panel including a liquid crystal layer interposed between the first and second substrates; And a hole formed in the display area of the liquid crystal panel.

At this time, the liquid crystal layer is sealed by a seal pattern covering the edges of the first and second substrates, the holes are formed respectively in the first and second substrates in the inside of the seal pattern, An actual pattern is formed.

A camera lens is disposed on the rear surface of the liquid crystal panel, and the hole is located corresponding to the camera lens, and the hole is a speaker hole.

In addition, a touch panel is provided on the liquid crystal panel, and the holes are formed on the touch panel, and a weather, a messenger icon, a remaining battery level, and a device status are displayed around the hole.

Further, a color and an image different from the image are displayed at the edge of the display area.

The present invention also provides a method of manufacturing a display device, comprising: forming first and second substrates each including a display area and a non-display area surrounding the display area; Forming a seal pattern corresponding to the non-display area on one of the first and second substrates and forming a closed seal pattern in the display area; Depositing a liquid crystal on the substrate on which the seal pattern is formed; Attaching the first and second substrates together; And forming holes in the first and second substrates in the closed-type seal pattern.

At this time, in the step of forming the closed-type seal pattern, the closed-type seal pattern is formed such that the start point and the end point of the closed-type seal pattern are spaced apart by 1 to 2 mm, and the closed-type seal pattern has a shape selected from a circle, .

In the hole forming step, the holes are formed through laser, etching, blast, water jet, and drill.

As described above, by forming the camera lens hole and the speaker hole in the display area of the liquid crystal panel of the liquid crystal display device according to the present invention, a lightweight and thin, Can be provided.

1 is a cross-sectional view schematically showing a liquid crystal display device according to an embodiment of the present invention.
2 is a plan view schematically showing a liquid crystal display device according to an embodiment of the present invention.
3A to 3C are plan views schematically showing a state in which a liquid crystal display device according to an embodiment of the present invention is applied to a portable display device.
4 is a flow chart showing a step of manufacturing a liquid crystal display device according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view schematically showing a liquid crystal display device according to an embodiment of the present invention.

As shown in the figure, the liquid crystal display device includes a liquid crystal panel 110, a backlight unit 120, a cover bottom 150 for modularizing the liquid crystal panel 110 and the backlight unit 120.

The liquid crystal panel 110 is a part that plays a key role in image display and includes a first substrate 112 and a second substrate 114 which are bonded to each other with a liquid crystal layer interposed therebetween, .

At this time, the liquid crystal panel 110 includes a display area AA (see FIG. 2) for displaying an image and a non-display area NA (see FIG. 2) in which various circuits and wirings are formed and are not used for image display do.

A seal pattern 210 (see FIG. 2) is formed along the non-display area NA (see FIG. 2) to prevent leakage of the liquid crystal layer (not shown) along the edges of the two substrates 112 and 114, .

The first and second polarizers 119a and 119b selectively transmit only specific light to the outer surfaces of the first and second substrates 112 and 114, respectively.

2) via a flexible circuit board or a connecting member 116 such as a tape carrier package (TCP) (refer to FIG. 2) along at least one edge of the liquid crystal panel 110 as described above. ).

In addition, the liquid crystal display device according to the present invention is provided with a backlight unit 120 for supplying light from the rear surface of the liquid crystal display panel so that the difference in transmittance of the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes an LED assembly 129, a white or silver reflective plate 125, a light guide plate 123 seated on the reflective plate 125, and an optical sheet 121 interposed therebetween .

The LED assembly 129 is disposed on one side of the light guide plate 123 so as to face the light incident surface of the light guide plate 123. The LED assembly 129 includes a plurality of LEDs 129a, And a PCB 129b which is mounted separately.

Here, the LED 129a is a light source. In addition to the LED 129a, a fluorescent lamp such as a cold cathode fluorescent lamp or an external electrode fluorescent lamp may be used.

At this time, the plurality of LEDs 129a include an LED chip (not shown) that emits all the colors of RGB or emits white light, and emits white light forward toward the light incoming surface of the light guide plate 123. On the other hand, the plurality of LEDs 129a emit light having colors of red (R), green (G) and blue (B), respectively. By lighting the plurality of RGB LEDs 129a at once, It can also be implemented.

The light guide plate 123 on which the light emitted from the plurality of LEDs 129a is incident is formed so that the light incident from the LED 129a travels through the light guide plate 123 by total reflection several times and spreads evenly over a wide area of the light guide plate 123 And provides a surface light source to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source.

The reflection plate 125 is disposed on the back surface of the light guide plate 123 and reflects light passing through the back surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of light.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light condensing sheet and diffuses or condenses the light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110 Let it enter.

The liquid crystal panel 110 and the backlight unit 120 are modularized through a cover bottom 150. The cover bottom 150 includes a horizontal surface 151 closely contacting the back surface of the backlight unit 120, And a side surface 153 formed on the side surface.

At this time, a step 155 is formed on the side surface 153 of the cover bottom 150, and the liquid crystal panel 110 is fixed to the step 153 of the cover bottom 150 through the adhesive material 140 such as a double- (Not shown).

Accordingly, the modular liquid crystal display device 100 displays an image on the front surface of the liquid crystal panel 110. [

Here, the liquid crystal display of the present invention modularizes the liquid crystal panel 110 and the backlight unit 120 using only the cover bottom 150, thereby eliminating the existing top cover and the support main to make it lightweight, thin and narrow bezel And simplification of the process and easy reassembly are obtained.

Also, the process cost can be reduced.

At this time, the cover bottom 150 may be referred to as a bottom cover, a bottom cover, or a system cover.

As the front surface of the liquid crystal panel 110 is exposed, a camera lens (not shown) is positioned on the back surface of the liquid crystal panel 110. In this case, the sharpness of the camera lens It is preferable to form the camera lens hole 230 (see FIG. 2) in the liquid crystal panel 110 corresponding to the camera lens (not shown) in order to improve the sharpness and sharpness.

That is, in the liquid crystal display of the present invention, the camera lens hole 230 (see FIG. 2) is positioned inside the seal pattern 210 (see FIG. 2) do. This will be described in more detail with reference to FIG.

2 is a plan view schematically showing a liquid crystal panel according to an embodiment of the present invention.

As shown in the drawing, the liquid crystal display according to the embodiment of the present invention includes a liquid crystal panel 110 in which a first substrate 112 and a second substrate 114 are bonded to each other across a liquid crystal layer (not shown) Element.

The first substrate 111 includes a display area AA for displaying an image and a non-display area NA formed by various circuits and wires and not used for displaying an image. The first substrate 112 A plurality of data lines DL and a gate line GL are vertically and horizontally crossed to define a pixel P in the display region AA of the thin film transistor T And are connected in a one-to-one correspondence with transparent pixel electrodes (not shown) provided in each pixel P.

In order to prevent leakage of a liquid crystal layer (not shown) filled between the two substrates 112 and 114, an actual pattern 210 is formed along the edge of the non-display area NA of both the substrates 112 and 114 .

The liquid crystal panel 110 of the present invention is characterized in that a camera lens hole 230 surrounded by a closed seal pattern 220 is provided in a display area AA in which an image is displayed.

Accordingly, the liquid crystal display device including the liquid crystal panel 110 according to the embodiment of the present invention can eliminate a separate area for providing the camera lens hole 230, thereby reducing the width of the bezel.

That is, in the conventional liquid crystal display device, the camera lens hole 230 is formed in a case where the liquid crystal panel 110 and the backlight unit (120 in FIG. 1) are modularized, that is, the cover bottom (150 in FIG. 1) 1 < / RTI > 150) is increased.

Therefore, there is a limit in reducing the width of the bezel.

In contrast, in the liquid crystal display of the present invention, since the camera lens hole 230 is formed in the liquid crystal panel 110, the thickness of the cover bottom (150 in FIG. 1) is prevented from increasing to reduce the width of the bezel, The width of the non-display area NA of the liquid crystal panel 110 can also be reduced by allowing the camera lens hole 230 to be positioned in the display area AA where the image of the liquid crystal panel 110 is implemented, Can be reduced.

At this time, stereoscopic images can be taken by providing two camera lenses (not shown) and corresponding camera lens holes 230 in the display area AA of the liquid crystal panel 110 (See FIG. 3A) for mounting a speaker (not shown) or a camera lens hole 230 and a speaker hole 270 (see FIG. 3A) in addition to the camera lens hole 230 It is possible.

When the camera lens hole 230 is located at the center of one edge of the display area AA as shown in the drawing, It is preferable to receive a signal through the gate drivers 240a and 240b provided on both sides.

In other words, a data pad portion 250 is formed on one side of the non-display area NA of the first substrate 112, and first and second gates are formed on left and right edges perpendicular to the edge where the data pad portion 250 is formed. So that the driving units 240a and 240b are formed.

The data pad unit 250 includes a plurality of data pad electrodes (not shown) and includes a connection member 116 on which a data pad electrode (not shown) and a data driving circuit 260 are mounted, a tape automated bounding Respectively.

The data driving circuits 260 mounted on the connecting member 116 are connected to the data PCB 117 via signal lines (not shown) mounted on the data PCB 117 connected to the connecting member 116 The control signals and the image signals are received and supplied to each other.

The first and second gate drivers 240a and 240b are turned on by a gate signal that turns on the thin film transistor T by using a gate control signal supplied from an external driving circuit And sequentially supplies them to the gate wiring GL.

At this time, the first gate driver 240a supplies the gate signal to the left display area of the camera lens hole 230, and the second gate driver 240b supplies the gate signal to the right display area of the camera lens hole 230 .

Accordingly, an image is displayed by adjusting the light transmittance of a liquid crystal layer (not shown) by an electric field formed between a pixel electrode (not shown) and a common electrode (not shown) according to a data signal supplied for each pixel P .

A liquid crystal layer (not shown) filled between the first and second substrates 112 and 114 is formed in the camera lens hole 230 (not shown) by forming the camera lens hole 230 to be surrounded by the closed- To the outside can be prevented. Let me take a closer look at this later.

3A to 3C are plan views schematically showing a state in which a liquid crystal display device according to an embodiment of the present invention is applied to a portable display device.

As shown in the figure, when the liquid crystal display device according to the embodiment of the present invention is applied to a full touch mobile phone 300 as a portable display device, the front face of the liquid crystal panel (110 of FIG. 2) So that the image is exposed.

The camera lens hole 230 and the speaker hole 270 are formed in the display area AA of the liquid crystal panel 110 in FIG. (220 in Fig. 2, not shown).

The bezel having the non-display area NA covering the edge of the display area AA of the liquid crystal panel 110 of FIG. 2 includes the gate circuit parts 240a and 240b and the data pad part 250, A signal is applied to the display area AA of the display area (110 in FIG. 2).

The camera lens hole 230 improves the sharpness and sharpness of the camera lens (not shown) positioned on the back surface of the liquid crystal panel 110 (FIG. 2) And a clearer sound is transmitted through a speaker (not shown) to be mounted.

Such a cellular phone 300 may allow an image to be implemented on the front surface of the cellular phone 300 as shown in FIG. 3A.

At this time, the same image may be all implemented on the front surface of the mobile phone 300. In an area A on one side of the camera lens hole 230 and the speaker hole 270, weather, a messenger icon, Remaining amount, device status, etc. may be displayed.

3C, the edge of the liquid crystal panel (110 in FIG. 2), that is, the edge of the display area AA, may be displayed in a color and an image desired by the user separately from the image.

At this time, in the case of the full touch mobile phone 300, a camera lens hole (not shown) formed in the display area AA of the liquid crystal panel (110 in Fig. 2) is formed in a touch panel (not shown) 230 and the speaker hole 270 at positions corresponding to the speaker hole 230 and the speaker hole 270, respectively.

Here, a manufacturing method of a liquid crystal display in which a camera lens hole 230 or a speaker hole 270 (hereinafter, a camera lens hole 230 is described as an example) is formed in a display area (AA in FIG. 2) Let's take a look.

4 is a flow chart showing a step of manufacturing the liquid crystal display device according to the embodiment of the present invention.

First, the liquid crystal display device performs a TFT-LCD cell process (St10), and forms a liquid crystal cell through the cell process St10.

More specifically, the TFT-LCD cell process (St10) includes a color filter substrate and an array substrate (St11), an alignment film formation (St12), an actual pattern and a spacer formation (St13) St15), cutting (St16), and inspection process (St17).

Thus, the first step St11 of the TFT-LCD cell process St10 is a step of forming the first substrate 112 of FIG. 2 as an array substrate and the second substrate 114 of FIG. 2 as a color filter substrate to be.

At this time, a plurality of gate lines (GL in FIG. 2) and data lines (DL in FIG. 2) cross each other on the inner surface of the first substrate (112 in FIG. 2) A thin film transistor (T in FIG. 2) is provided and connected in one-to-one correspondence with transparent pixel electrodes (not shown) formed in each pixel (P in FIG. 2).

The inner surface of the second substrate (114 in FIG. 2) may include a color filter of red (R), green (G), and blue (B) And a black matrix (not shown) covering the non-display elements such as a gate line (GL in FIG. 2), a data line (DL in FIG. 2) and a thin film transistor (in FIG. 2) And a transparent common electrode (not shown) covering them are provided.

The second step St12 is a step of forming an alignment film (not shown) on the first substrate (112 in Fig. 2) and the second substrate (114 in Fig. 2) and is a step of applying and curing an alignment film , And a rubbing treatment process.

The third step St13 is to form the seal pattern 210 of FIG. 2 so that the liquid crystal interposed between the first substrate 112 (FIG. 2) and the second substrate (114 of FIG. 2) (Not shown) of a predetermined size to precisely and uniformly maintain a gap between the first substrate (112 in FIG. 2) and the second substrate (114 in FIG. 2).

2) of the first substrate (112 in FIG. 2) or the second substrate (114 in FIG. 2) is formed along the non-display region (NA in FIG. 2) 2) of the camera lens hole (230 in FIG. 2) in the area where the camera lens hole (230 in FIG. 2) in the display area (AA in FIG. 2) of the second substrate And a closed seal pattern (220 in Fig. 2) is formed corresponding to the shape.

The closed-type seal pattern (220 in FIG. 2) formed in the display area (AA in FIG. 2) may have various shapes such as circular, square, octagonal.

In the process of forming the closed seal pattern (220 in FIG. 2), the start and end points of the closed seal pattern (220 in FIG. 2) are not formed so as to be in contact with each other, desirable.

2) of the closed type seal pattern (220 in FIG. 2) is pressed by the first and second substrates (112 and 114 in FIG. 2) To prevent the line width of the closed-type seal pattern (220 in Fig. 2) at the meeting point from becoming thick.

The fourth step St14 of the TFT-LCD cell process St10 is a step of dropping liquid crystal on a substrate on which an actual pattern (210 in Fig. 2) and a closed seal pattern (220 in Fig. 2) Step St15 is a bonding step between the first substrate (112 in FIG. 2) and the second substrate (114 in FIG. 2), and then proceeds to a sixth step (St16) of cutting the bonded substrates in units of cells .

2) of the first and second substrates (112 and 114 in Fig. 2) in the process of cutting the first and second substrates (112 and 114 in Fig. 2) A camera lens hole (230 in FIG. 2) is formed together in a closed-type seal pattern (220 in FIG.

At this time, the formation of the camera lens hole (230 in FIG. 2) may be performed using a laser or may be formed by etching. Also, it may be formed by using blast, water jet, drill or the like.

In the case of using a laser, the position and size of the camera lens hole (230 in FIG. 2) can be freely set in forming the camera lens hole (230 in FIG. 2).

Here, the laser can use one of a Nd: YLF (Yttrium Lithium Fluoride) laser device and a picosecond laser device. When the Nd: YAG laser device is used, the laser has a fundamental wavelength of 1064 nm, (230 in FIG. 2) by irradiating a laser having a wavelength of 532 nm and 366 nm, which are wavelengths that can be formed through the liquid crystal cell, in the display region (AA in FIG. 2) of the unit liquid crystal cell.

The above-described YAG-type laser devices are much lower cost than the excimer laser device, and can reduce the cost of forming the camera lens hole (230 in FIG. 2).

In addition, the YAG-type laser devices can ablate the edge of the camera lens hole (230 in FIG. 2) more smoothly than the thermal shock-type CO2 laser in the ablation method.

That is, when a camera lens hole (230 in FIG. 2) is to be formed using a CO ₂ laser, stress is concentrated on the camera lens hole (230 in FIG. 2) by thermal shock, Cracks due to cracking are generated.

Therefore, it is preferable to use a YAG-type laser device in comparison with a CO ₂ laser.

Finally, the seventh step (St17) of the TFT-LCD cell process (St10) is an inspection process of the liquid crystal cell cut in the cell unit. Quality liquid crystal cell is selected through an inspection process.

As a result, the TFT-LCD cell process (St10) is completed and the liquid crystal cell is completed.

Next, a polarizer attaching step (St20) for attaching the polarizing plates (119a and 119b in Fig. 1) to the outer sides of the first substrate (112 in Fig. 2) and the second substrate (114 in Fig. 2) The polarizer (119a, 119b in FIG. 1) serves to convert the light source to linear light on both sides of the liquid crystal cell.

The driving circuit (117 in FIG. 2) includes a driving circuit (117 in FIG. 2) for connecting an electrical signal to the first substrate (112 in FIG. 2) of the liquid crystal cell, Is attached to the liquid crystal cell in a TAB manner in which the liquid crystal cell is directly mounted on the connecting member (116 in Fig. 2).

This completes the liquid crystal panel (110 in Fig. 2) which can be actually driven.

Next, a cell test process (St40) is performed. In the cell test process, when one liquid crystal panel (110 of FIG. 2) attached up to the driving circuit (117 of FIG.

Through this inspection process, a good quality liquid crystal panel (110 of FIG. 2) is selected.

2), the cover bottom (150 in FIG. 1) is positioned after the backlight unit (120 in FIG. 1) is positioned in the lower portion of the liquid crystal panel (110 in FIG. 2) (110 of FIG. 2) and the backlight unit (120 of FIG.

Thus, a modular liquid crystal display device is completed.

As described above, the liquid crystal display of the present invention forms a camera lens hole (230 in FIG. 2) and a speaker hole (270 in FIG. 2) in the display area (AA in FIG. 2) of the liquid crystal panel Thus, it is possible to eliminate a separate area for accommodating the camera lens hole (230 in FIG. 2), thereby reducing the width of the bezel of the liquid crystal display device.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

110: liquid crystal panel, 112, 114: first and second substrates
116: connecting member, 117: printed circuit board
210: thread pattern, 220: closed thread pattern, 230: camera lens hole
240a and 240b: first and second gate drivers
250: data pad unit, 260: data driving circuit

Claims (12)

A first substrate on which a display region including a plurality of pixels and a non-display region covering the periphery of the display region are formed, a second substrate provided with a color filter facing the first substrate and for realizing color, A liquid crystal panel including a liquid crystal layer interposed between two substrates;
A hole formed in the display area of the liquid crystal panel;
/ RTI >
Wherein the liquid crystal layer is sealed by a seal pattern covering edges of the first and second substrates, the holes are formed in the first and second substrates, respectively,
A closed seal pattern is formed around the hole,
The liquid crystal of the liquid crystal layer is dropped to the outside of the closed seal pattern, and the liquid crystal is in contact with the outer surface of the closed seal pattern.
The method according to claim 1,
The first gate driver supplies a gate signal to a left display region of the hole, and the second gate driver applies a gate signal to the right display region of the hole, A liquid crystal display device for supplying a signal.
delete The method according to claim 1,
Wherein a camera lens is disposed on a rear surface of the liquid crystal panel, and the hole is located corresponding to the camera lens.
The method according to claim 1,
Wherein the hole is a speaker hole.
The method according to claim 1,
Wherein the liquid crystal panel is provided with a touch panel on an upper portion thereof, and the hole is formed on the touch panel.
The method according to claim 6,
And a weather, a messenger icon, a remaining battery level, and a device status are displayed around the hole.
The method according to claim 1,
And a color and an image different from the image are displayed on an edge of the display area.
Forming a first substrate and a second substrate each including a non-display region covering a display region and an outer portion thereof;
Forming a seal pattern corresponding to the non-display area on one of the first and second substrates and forming a closed seal pattern in the display area;
Depositing a liquid crystal on the substrate on which the seal pattern is formed;
Attaching the first and second substrates together;
Forming a hole in the first and second substrates into the closed-type seal pattern
/ RTI >
The liquid crystal is dropped to the outside of the closed-type seal pattern, and the liquid crystal is in contact with the outer side surface of the closed-type seal pattern.
10. The method of claim 9,
Wherein the forming of the closed-type seal pattern is performed such that a start point and an end point of the closed-type seal pattern are spaced apart by 1 to 2 mm.
10. The method of claim 9,
Wherein the closed seal pattern has a shape selected from a circle, a rectangle, and an octagon.
10. The method of claim 9,
Wherein the hole is formed through one of a laser, an etching, a blast, a water jet, and a drill in the hole forming step.

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