KR101782018B1 - Display device - Google Patents

Abstract

In the display of the present invention, the lower cover is integrally formed on the three sides of the outer panel, and the other side is covered with the lower cover by applying a metal printed circuit board (M-PCB) And simultaneously embodying a narrow bezel of 1.5 mm or less.
According to this, the assembling property of the internal parts of the backlight unit is ensured, the reduction of the unit cost by eliminating the guide panel, and the radiation efficiency by the use of the heat-dissipating metal substrate are increased.
Further, the present invention is characterized in that, in a deformed display having a hole, a cylinder-shaped guide means is applied to the hole region to ensure tightness between the guide means and the lower cover.

Description

Display {DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display, and more particularly, to a display in which the structure of a lower cover is simplified.

In recent information society, display (or display device) is becoming more important as a visual information delivery medium, and in order to take a major position in the future, it is necessary to reduce the power consumption, thinning, lightening, It must meet.

The display includes a cathode ray tube (CRT), an electroluminescence (EL), a light emitting diode (LED), a vacuum fluorescent display (VFD) A light emitting type such as a field emission display (FED), a plasma display panel (PDP) or the like, and a non-light emitting type such as a liquid crystal display (LCD)

The liquid crystal display device is an apparatus for displaying an image using the optical anisotropy of a liquid crystal and has a better visibility than a conventional cathode-ray tube and has a smaller average heat dissipation than a cathode-ray tube of the same screen size, .

Hereinafter, a typical liquid crystal display device will be described in detail.

In general, a liquid crystal display device can display a desired image by individually supplying data signals according to image information to pixels arranged in a matrix form, and adjusting light transmittance of pixels.

Accordingly, a liquid crystal display device is provided with a liquid crystal panel in which pixels are arranged in a matrix form, a driver for driving the pixels, and a backlight unit for supplying light to the liquid crystal panel.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.

FIG. 2 is a schematic cross-sectional view taken along the line A-A 'of the general LCD shown in FIG. 1. Referring to FIG.

1 and 2, a general liquid crystal display device includes a liquid crystal panel 10 in which pixels are arranged in a matrix to output an image, a driving unit (not shown) for driving the pixels, A backlight unit 40 installed to emit light over the entire surface of the liquid crystal panel 10 and a lower cover 50 for accommodating and fixing the liquid crystal panel 10 and the backlight unit 40.

The liquid crystal panel 10 includes a color filter substrate 5 and a color filter substrate 5. The color filter substrate 5 and the color filter substrate 5 are arranged in a cell gap between the color filter substrate 5 and the array substrate 15 so as to maintain a uniform cell gap. And a liquid crystal layer (not shown).

Upper and lower polarizers 1 and 11 are attached to the outside of the liquid crystal panel 10 and the lower polarizer 11 polarizes the light transmitted through the backlight unit 40 and the upper polarizer 1 Thereby polarizing the light passing through the panel 10.

A light emitting diode (LED) assembly 30 for emitting light is provided on one side of a light guide plate 42 and a backlight unit 40 is mounted on the rear surface of the light guide plate 42. [ A reflector 41 is provided.

The LED assembly 30 includes an LED array 31, an LED array printed circuit board (PCB) (not shown) for driving the LED array 31, and a housing 32.

The light emitted from the LED array 31 is incident on the side surface of the light guide plate 42 of transparent material and the reflection plate 41 disposed on the back surface of the light guide plate 42 reflects light transmitted through the back surface of the light guide plate 42 to the light guide plate 42 To the optical sheets 43 on the upper surface to reduce light loss and improve uniformity.

The liquid crystal panel 10 composed of the color filter substrate 5 and the array substrate 15 is seated on the upper part of the backlight unit 40 constructed as described above through the guide panel 45 and the lower cover 50 is coupled Thereby constituting a liquid crystal display device.

That is, the liquid crystal panel 10 is mounted on the seating portion 45a of the guide panel 45 through the adhesive tape 46 and the lower cover 50 is fixed to the guide panel 45 through the hook 51 on the outer side 45 engage with the side fastening portions 45b.

There is a growing need to use very thin bezels that are more trendy and slim than current products and can satisfy the user's convenience.

At this time, when a guide panel 45 made of a mold is applied, a molding thickness of at least 0.6 mm to 0.8 mm is required, which is limited to a narrow bezel structure of 1.5 mm or less.

Further, in the structure in which the hook 51 is applied to the outside of the above-described lower cover 50, or the hook is applied to the inside of the guide panel 45, molding and dimensional control are more limited.

That is, the fixing structure of a general optical sheet requires a minimum amount of overlapping (or overlapping width) between the seating portions 45a of the guide panel 45 and the optical sheets 43 for constraining in the X and Y directions Do. Further, at least 0.05 mm is overlapped between the seating portion of the light-incoming portion guide panel 45 and the optical sheets 43 for restraining in the Z direction. Accordingly, in the structure in which the guide panel 45 and the lower cover 50 are separated from each other as in the prior art, a bezel width (a) of 5.0 mm is required, which limits the application of the narrow bezel structure of 1.5 mm or less.

Further, in the structure in which the LED array printed circuit board is attached to the lower cover 50 using the adhesive tape, the attachment of the LED array 31 is difficult and light leakage occurs, or the light guide plate 42 and the optical sheets 43 There is a possibility that cracks of the light guide plate 42 and splitting of the optical sheets 43 may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display of a narrow bezel structure capable of securing the assemblability of internal components of a backlight unit.

It is another object of the present invention to provide an offset display having one or more holes in the screen area of the display.

Other objects and features of the present invention will be described in the following description of the invention and the claims.

In order to achieve the above object, a display according to an embodiment of the present invention includes a backlight unit positioned below a liquid crystal panel, and a plurality of side portions extending vertically from an outer edge of the bottom, A lower cover for housing and enclosing the backlight unit, a side portion on which the light source is mounted, and a metal substrate extending inward from the upper and lower ends of the side portion to constitute upper and lower portions and accommodating and enclosing the backlight unit in the remaining portion of the outer tube .
At this time, the side portions of the lower cover are folded inward to form a seating portion, and the outer edge of the liquid crystal panel is seated on the seating portion and the upper portion of the metal substrate, and the metal substrate has a fastening means at the lower portion And a guide rib protruding from an end of a seating portion of the lower cover is inserted and fixed through an insertion groove provided in the upper portion of the upper cover.

The backlight unit may include a light source disposed on one side of the light guide plate, a reflection plate disposed on the back surface of the light guide plate, and optical sheets disposed on the upper surface of the light guide plate.

At this time, the lower cover may include a plurality of side portions extending vertically from the bottom, and a seating portion in which the side portions are bent toward the center.

At this time, the edges of the liquid crystal panel may be seated on the seating portions of the lower cover.

The side plates and the seating portions of the lower cover are bent in a " C " shape from the bottom of the lower cover, and the reflective plate, the light guide plate and the optical sheets are bent in the ' And can be received and fixed within the lower cover by the seat portions.

The metal substrate may include a side portion on which the light source is mounted and an upper portion and a lower portion extending from the upper and lower ends of the side portion toward the light guide plate.

At this time, the lower portion of the metal substrate may face the upper portion, may extend toward the light guide plate, and may be seated on the bottom of the lower cover.

The lower portion of the metal substrate may be provided with fastening means for fastening the lower cover to the fastening hole of the lower cover.

The upper portion of the metal substrate may have a 'C' shape having an insertion groove into which a guide rib of the lower cover is inserted.

And at least one hole provided in a predetermined area of the liquid crystal panel and the lower cover and through which the mechanism passes.

In this case, the liquid crystal display panel may further include guide means provided in the hole between the liquid crystal panel and the lower cover and fastened to the lower cover.

The liquid crystal panel, the optical sheet, the light guide plate, the reflection plate, and the lower cover may have a curved shape, a polygonal shape, or a mixed shape of curves and polygons.

The hole may include a first hole provided in the liquid crystal panel, a second hole provided in the optical sheet, a third hole provided in the light guide plate, a fourth hole provided in the reflector, and a fifth hole provided in the lower cover. Holes.

At this time, the first through fifth holes may have a curved shape, a polygonal shape, or a curved shape and a polygonal shape.

The lower cover may have a protrusion protruding from the edge of the fifth hole towards the liquid crystal panel.

At this time, the projecting portion of the lower cover passes through the second hole, the third hole, and the fourth hole, so that the optical sheet, the light guide plate, and the reflection plate can be received in the lower cover.

Wherein the guide means comprises: a cylinder-shaped body into which the liquid crystal panel is inserted through the first hole; a support portion extending outward from an outer circumferential surface of the body and having an edge of the liquid crystal panel around the first hole; And a fastening portion extending downward from the inner edge of the support portion and fastened to the protruding portion of the lower cover.

At this time, the guide means may have a thread corresponding to the thread of the protrusion on the outer side of the fastening portion fitted in the protrusion.

As described above, the display according to the embodiment of the present invention is characterized by realizing a narrow bezel of 1.5 mm or less while securing the fastening property of the backlight unit.

According to this, it is possible to assure the assemblability of the internal parts of the backlight unit, reduce the unit price of 0.5 $ by eliminating the guide panel, and increase the heat radiation efficiency by using the heat-radiating metal substrate.

Further, the display according to an embodiment of the present invention is characterized by securing fastenability between the guide means and the lower cover by applying guide means in the form of a cylinder to the hole area.

According to this, rattle of the optical sheet and rattle noise due to light leakage and flow are prevented, reliability is improved, and the cost is reduced by eliminating the mold for fixing the optical sheet.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.
FIG. 2 is a schematic cross-sectional view taken along line A-A 'of the general LCD shown in FIG. 1; FIG.
3 is a perspective view schematically showing a structure of a display according to a first embodiment of the present invention;
FIG. 4 schematically shows a cross section taken along the line B-B 'in the display according to the first embodiment of the present invention shown in FIG. 3;
5 is a schematic cross-sectional view taken along the line C-C 'in the display according to the first embodiment of the present invention shown in FIG. 3;
FIG. 6 is an exploded perspective view schematically showing a structure of a lower cover and a heat-radiating metal substrate in a display according to a first embodiment of the present invention shown in FIG. 3;
7 is a plan view showing an example of a display according to a second embodiment of the present invention.
FIG. 8 is an exploded perspective view schematically showing the structure of a display according to a second embodiment of the present invention shown in FIG. 7; FIG.
Figure 9 schematically shows a planar structure of a display according to a second embodiment of the present invention shown in Figure 8;
10 is a perspective view schematically showing the structure of the guide means in the display according to the second embodiment of the present invention shown in FIG.
11 is a view schematically showing a cross section taken along the line D-D 'in the display according to the second embodiment of the present invention shown in FIG.
12 is a view schematically showing a cross section taken along the line E-E 'in the display according to the second embodiment of the present invention shown in FIG. 9;
13 is a view schematically showing a cross section along a line F-F 'in the display according to the second embodiment of the present invention shown in FIG. 9;
FIGS. 14A and 14B are cross-sectional views schematically showing a part of a lower cover and guide means according to a second embodiment of the present invention shown in FIG. 11;

Hereinafter, preferred embodiments of the display according to the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. The dimensions and relative sizes of the layers and regions in the figures may be exaggerated for clarity of illustration.

It will be understood that when an element or layer is referred to as being another element or "on" or "on ", it includes both intervening layers or other elements in the middle, do. On the other hand, when a device is referred to as "directly on" or "directly above ", it does not intervene another device or layer in the middle.

The terms spatially relative, "below," "lower," "above," "upper," and the like, And may be used to easily describe the correlation with other elements or components. Spatially relative terms should be understood to include, in addition to the directions shown in the drawings, terms that include the different directions of the elements in use, or in operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprise "and / or" comprising ", as used in the specification, means that the presence of stated elements, Or additions.

3 is a perspective view schematically showing a structure of a display according to a first embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view taken along the line B-B 'in the display according to the first embodiment of the present invention shown in FIG.

FIG. 5 is a schematic cross-sectional view taken along the line C-C 'in the display according to the first embodiment of the present invention shown in FIG.

4 shows an example of a cross-section of an edge portion, and FIG. 5 shows an example of a lower cross-section of a display where a light source is located.

FIG. 6 is an exploded perspective view schematically showing the structure of the lower cover and the heat-radiating metal substrate in the display according to the first embodiment of the present invention shown in FIG.

3 to 6, a display 100 according to a first embodiment of the present invention includes a liquid crystal panel 110 for injecting liquid crystal between a color filter substrate 105 and an array substrate 115 to output an image, A backlight unit 140 installed on the back surface of the liquid crystal panel 110 to emit light over the entire surface of the liquid crystal panel 110 and a dual structure in which the liquid crystal panel 110 and the backlight unit 140 are accommodated and fixed. A lower cover 150 and a metal printed circuit board (M-PCB) 155.

The liquid crystal panel 110 includes a color filter substrate 105 and a color filter substrate 105. The color filter substrate 105 is arranged so that pixels are arranged in a matrix form to output an image, And a liquid crystal layer formed in a cell gap between the array substrate 115 and the liquid crystal layer.

Although not shown in detail, a common electrode and a pixel electrode are formed on the liquid crystal panel 110 in which the color filter substrate 105 and the array substrate 115 are bonded together to apply an electric field to the liquid crystal layer, The liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode so that light is transmitted or blocked for each pixel to display a character or an image .

At this time, a switching element such as a thin film transistor (TFT) is separately provided in the pixels to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis.

That is, a gate line and a data line are vertically and horizontally arranged on the array substrate 115 to define a pixel region, and a thin film transistor, which is a switching element, is formed in a crossing region between the gate line and the data line.

The thin film transistor includes a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode connected to the pixel electrode.

The color filter substrate 105 includes a color filter composed of a plurality of sub-color filters that implement the colors of red, green, and blue, a black matrix that separates sub-color filters and blocks light transmitting through the liquid crystal layer, Filter and an overcoat layer formed over the black matrix.

Polarizing plates 101 and 111 are attached to the outer sides of the color filter substrate 105 and the array substrate 115. The lower polarizing plate 111 polarizes the light transmitted through the backlight unit 140 and the upper polarizing plate 101 Polarizes the light passing through the liquid crystal panel 110. [

At this time, the edge side of the liquid crystal panel 110 in which the color filter substrate 105 and the array substrate 115 are bonded together can be sealed with the sealing material 148 through side sealing. However, the present invention is not limited thereto. 4, the upper polarizer 101 may be attached so as to cover a part of the sealing material 148, but the present invention is not limited thereto.

A light source 132 for generating light is provided on one side of the light guide plate 142 and a reflection plate 141 is provided on the back side of the light guide plate 142. [ Can be installed.

A plurality of optical sheets 143 may be disposed on the upper surface of the light guide plate 142 to improve the efficiency of light emitted from the light guide plate 142 and illuminate the liquid crystal panel 110.

However, the present invention is not limited to the structure of the above-described backlight unit 140, and any backlight unit 140 of any structure can be applied to the display device 100 according to the present invention.

The light guide plate 142 receives light from the light source 132 and guides the light to the liquid crystal panel 110 side. At this time, the light provided from the light source 132 is provided as an incident surface of the light guide plate 142. This incident surface faces the side 155a of the heat dissipating metal substrate 155. [ That is, the light source 132 is located on the side portion 155a of the heat dissipation metal substrate 155, and the incident surface of the light guide plate 142 faces the light emitting surface of the light source 132. [

The light guide plate 142 may be made of PMMA (polymethyl methacrylate) or PC (polycarbonate) plastic.

The reflection plate 141 is positioned between the lower cover 150 and the back surface of the light guide plate 142. The reflection plate 141 serves to reflect light from the light source 132 and light from the light guide plate 142 to the liquid crystal panel 110 side. 4 and 5 illustrate a case where the reflection plate 141 is formed substantially in the same shape as the shape of the light guide plate 142, but the present invention is not limited thereto. The reflection plate 141 of the present invention may be configured to surround the edge of the light guide plate 142.

The light source 132 is a means for emitting light such as a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), an external electroluminescence lamp (EEFL), or a light emitting diode But the present invention is not limited thereto. Hereinafter, an LED array is used as the light source 132 for convenience of explanation.

The LED array may comprise a light emitting package having at least one LED. The light emitting package may be a light emitting package having different colors, for example, a red light emitting diode, a green light emitting diode, and a blue light emitting diode.

The LED array is installed on the side portion 155a of the heat dissipating metal substrate 155 so that the light emitting surface faces the incident surface of the light guide plate 142. [

The heat dissipation metal substrate 155 refers to a printed circuit board on which a base material is made of metal. As a main raw material, aluminum has excellent heat dissipation performance and good thermal conductivity and main purpose is heat dissipation function. Insulation layer with high thermal conductivity and high insulation strength and copper foil for accommodating high capacity electrical performance can be used. The insulating layer can be used for thermal conduction, interlayer electrical insulation and adhesive.

The light source 132 may be connected to the inverter to receive power and emit light.

The light emitted from the light source 132 is incident on the side surface of the light guide plate 142 of the transparent material and the reflection plate 141 disposed on the back surface of the light guide plate 142 reflects light transmitted to the back surface of the light guide plate 142, The light is reflected toward the optical sheets 143 on the upper surface to reduce light loss and improve the uniformity.

Although not shown in detail, the optical sheets 143 include a diffusion sheet and a prism sheet, and a brightness enhancement film such as a Dual Brightness Enhancement Film (DBEF) and a protective sheet may be added.

The optical sheets 143 may be provided between the upper surface of the light guide plate 142 and the rear surface of the liquid crystal panel 110. The prism sheet condenses light from the light guide plate 142, the diffusion sheet diffuses light from the prism sheet, and the protective sheet serves to protect the brightness enhancement film, the prism sheet, and the diffusion sheet. Light passing through the protective sheet is provided to the liquid crystal panel 110 side.

The backlight unit 140 having such a structure is housed in the heat-radiating metal substrate 155 and the lower cover 150 of the dual structure according to the present invention.

That is, in the display 100 according to the first embodiment of the present invention, the lower cover 150 with the guide panel integrated type is used for the three sides of the outer panel, and the lower cover 150 is formed by applying the heat- Thereby ensuring fastening properties and realizing a narrow bezel of 1.5 mm or less.

For reference, the inner bezel has a limited size from the glass end of the color filter substrate 105 and the array substrate 115 to the outline of the structure. Accordingly, in the present invention, instead of deleting the conventional guide panel, an integrated lower cover 150 is applied so that the lower cover 150 can also serve as a guide panel, and a narrow bezel .

To this end, the lower cover 150 may include a plurality of, for example three, side portions 150a extending vertically from the bottom. The side portions 150a may extend vertically from the three corners of the lower cover 150 to have a predetermined height. The edges of the side portions 150a adjacent to each other can be connected to each other.

Each side portion 150a is folded toward the center of the display 100 to form a seating portion 150a 'having a predetermined width and the liquid crystal panel 110 can be seated on the seating portions 150a'.

The space surrounded by the side portions 150a and the seating portions 150a 'forms a storage space in which the backlight unit 140 is housed. That is, it can be seen that the side portions 150a and the seating portions 150a 'are curved in a' C 'shape from the bottom of the lower cover 150. Accordingly, the reflection plate 141, the light guide plate 142, and the optical sheets 143 are housed in the lower cover 150, and the three surfaces of the reflection plate 141, the light guide plate 142, and the optical sheets 143 Can be fixed inside the lower cover 150 by the side portions 150a and the seating portions 150a 'of the lower cover 150 bent in a' C 'shape.

At this time, the remaining one surface of the reflection plate 141, the light guide plate 142, and the optical sheet 143, which is not fixed by the lower cover 150, is disposed on the side of the heat dissipation metal substrate 155 ). ≪ / RTI >

That is, when the integral lower cover 150 described above is applied, the assemblability of the internal parts of the backlight unit 140 is lowered, and there is a possibility that defects such as cracks of the light leakage and the light guide plate 142 may occur. The other one surface of the light guide plate 142 and the optical sheets 143 is fixed by applying a heat dissipating metal substrate 155 to the lower surface of the lower cover 150, Thereby ensuring fastening properties and realizing a narrow bezel of 1.5 mm or less.

According to this, the assemblability of the internal parts of the backlight unit 140 is secured, and the number of assembling holes is reduced, and at the same time, the elimination of the guide panel provides an effect of securing unit price competitiveness by reducing the unit price of about 0.5 $. In addition, convection caused by contact of air can be used by using the heat-dissipating metal substrate 155 in the outer appearance, and the effect of maximizing the heat radiation efficiency by eliminating the heat trapping phenomenon due to the removal of the tape for attaching the light source 132 to provide.

The heat dissipation metal substrate 155 includes a side portion 155a on which the light source 132 is mounted and upper and lower portions 155b and 155c extending from the upper and lower ends of the side portion 155a toward the light guide plate 142 .

The lower portion 155c of the heat dissipation metal substrate 155 faces the upper portion 155b and may extend to the light guide plate 142 and the reflection plate 141 and may be seated on the bottom of the lower cover 150. [

The lower portion 155c of the heat dissipation metal substrate 155 may be provided with fastening means 156 such as a hook to be inserted into the fixing hole 152 of the lower cover 150.

The upper portion 155b of the heat dissipation metal substrate 155 may have a U shape having an insertion groove into which a guide rib 151 of the lower cover 150 is inserted. That is, the insertion groove is opened toward the guide rib 151 of the lower cover 150, and when the heat dissipating metal substrate 155 is inserted into the lower cover 150 and fastened, A guide rib 151 protruding from an end of the guide rib 150a 'may be inserted and fixed.

The heat dissipation metal substrate 155 is fastened to the fixing hole 152 of the lower cover 150 through the fastening means 156 and the guide rib 151 of the lower cover 150 is inserted through the insertion groove And is fastened to the lower cover 150.

In addition, predetermined shielding tapes 146a and 146b may be provided on the lower cover 150 and the heat-radiating metal substrate 155 having the above-described structure.

The light shielding tapes 146a and 146b may correspond to the regions of the backlight unit 140 corresponding to the light sources 132 and the edges of the lower cover 150 and the liquid crystal panel 110 may be connected to the lower cover 150 and / And can be fixed to the heat-radiating metal substrate 155. However, the present invention is not limited thereto.

Further, the light-shielding tapes 146a and 146b are formed in black as a whole, so that the light emitted from the backlight unit 140 can be prevented from leaking to the outside.

The technical idea of the present invention is also applicable to a mold-release display other than a conventional rectangular display, which will be described in detail through a second embodiment of the present invention.

A product that is out of the existing square design like a circle is called a release display, but the shape of the thing is different from the conventional one. In other words, the mold release display is a display which is deformed in various forms such as a circular shape or a rhombus shape from a conventional rectangular display.

Unlike conventional square displays, this type of display is manufactured in various forms, so the manufacturing process is important. In addition, you should use a very thin bezel that is more streamlined and slimmer than your previous product and can satisfy your convenience.

In recent years, as the utilization of the display gradually increases, it is used in various fields and it is necessary to develop a display according to application fields. As an example, it is also necessary to consider the case where a physical button or a small hand, a minute hand, an hour hand, or the like has at least one hole through which the equipment can pass.

FIG. 7 is a plan view showing an example of a display according to a second embodiment of the present invention.

The mold release display referred to in the present invention refers to a display in which various shapes are deformed, such as a circle, a rhombus, or an ellipse out of a conventional rectangular display, or a mixture of various shapes. A narrow bezel structure of 1.5 mm or less is applied.

Further, the present invention is characterized in that the display area of such a mold-release display has at least one hole through which a physical button, a second hand, a minute hand, a display needle of an hour hand, and a needle (or pointer)

However, the present invention does not exclude a conventional rectangular display, and the present invention is also applicable to a case where one or more holes are provided in a screen area of a rectangular display. That is, the display of the present invention may have a curved shape such as a circle or an ellipse, a polygonal shape such as a rectangle or a rhombus, or a mixed shape of various shapes.

The holes may also have a curved shape such as a circular shape or an elliptical shape, a polygonal shape such as a rectangle or a rhombus, or a mixed shape of various shapes.

In this case, the mold release display according to the second embodiment of the present invention shown in FIG. 7 is an example of a vehicle instrument panel, but the present invention is not limited thereto.

Referring to FIG. 7, a vehicle instrument panel 200 called a cluster gauge is an instrument panel for informing a driver of the overall running state of the vehicle. The driver can see the vehicle instrument panel from time to time while looking forward, .

 The mobile instrument panel 200 according to the second embodiment of the present invention includes a tachometer 221, a speedometer 222, a cooling water temperature meter 223 and a flow meter 224, The speed of the vehicle, the temperature of the coolant, and the flow rate state of the vehicle, which are sensed through the needle (or pointer) (not shown).

In this case, for example, the tachometer 221 may be located on the left side of the vehicle instrument panel 200, and indicates the revolution number, RPM (revolution per minute), of the engine by the needle 225.

The speedometer 222 may be located to the right of the vehicle dashboard 200 and represents the speed of the vehicle by the needle 225.

Accordingly, the driver can read the number indicated by the needle 225, and can grasp the state information of the vehicle while driving, adjust the speed during driving of the vehicle by referring to the information, and the like.

That is, the driver can recognize the speed of the vehicle while driving by confirming the speedometer 222, and can recognize the revolution speed per minute of the engine through the tachometer 221.

The flowmeter 224 also allows the driver to recognize the fuel replenishment time because the warning lamp is turned on when the fuel remaining amount becomes lower than the set value.

The cooling water temperature sensor 223 recognizes the cooling water temperature of the engine by the driver so as to prevent malfunction and damage due to overheating.

A scale is displayed on the gauges such as the tachometer 221, the speedometer 222, the cooling water temperature meter 223 and the flow meter 224, and a needle (not shown) is moved along the scale according to the change in the target value displayed on each gauge 225 are installed. Therefore, the driver can read the scale of the portion where the needle 225 is positioned, and confirm the target value displayed on each gauge.

The vehicle dashboard 200 according to the second embodiment of the present invention includes the display unit 220 that displays the engine rotation speed, the vehicle speed, the coolant temperature, and the flow rate state information of the vehicle, The unit 220 is implemented as an image output through a liquid crystal panel, for example.

The display unit 220 has a shape in which various shapes such as a straight line and a curved line that are substantially the same as the outer shape of the vehicle instrument panel 200 are mixed. For example, the tachometer 221 and the needle 225 of the speedometer 222 penetrate A portion except a hole (not shown) may be a display area.

The vehicle instrument panel 200 includes a tachometer 221 or a circular tachometer 221, a speedometer 222, a cooling water temperature meter 223 and a flow meter 124 and a dial 226 , And 227 are displayed. A predetermined number is displayed according to the scale, and the number of the needle 225 rotates about the hole so that the RPM, the speed, the coolant temperature, and the flow rate can be known.

8 is an exploded perspective view schematically showing a structure of a display according to a second embodiment of the present invention shown in FIG.

FIG. 9 is a schematic view showing a planar structure of a display according to a second embodiment of the present invention shown in FIG.

10 is a perspective view schematically showing the structure of the guide means in the display according to the second embodiment of the present invention shown in FIG.

FIG. 11 is a schematic cross-sectional view taken along the line D-D 'in the display according to the second embodiment of the present invention shown in FIG.

FIG. 12 is a schematic cross-sectional view taken along the line E-E 'in the display according to the second embodiment of the present invention shown in FIG.

FIG. 13 is a schematic cross-sectional view taken along the line F-F 'in the display according to the second embodiment of the present invention shown in FIG.

11 shows an example of a cross-section of the hole, FIG. 12 shows an edge of the edge, and FIG. 13 shows an example of a lower surface of the display where the light source is located.

14A and 14B are cross-sectional views schematically showing a part of a lower cover and guide means according to a second embodiment of the present invention shown in FIG.

8 to 14A and 14B, a display 200 according to a second embodiment of the present invention roughly includes a liquid crystal display panel 200, in which a liquid crystal is injected between a color filter substrate 205 and an array substrate 215, A backlight unit 240 installed on the rear surface of the liquid crystal panel 210 to emit light over the entire surface of the liquid crystal panel 210 and a liquid crystal panel 210 and a backlight unit 240, A lower cover 250 having a dual structure and a heat dissipation metal substrate 255.

As described above, the liquid crystal panel 210 includes a color filter substrate 205 to which pixels are arranged in a matrix form to output an image, and the color filter substrate 205 is bonded so as to face each other and maintain a uniform cell gap, And a liquid crystal layer formed in a cell gap between the substrate 205 and the array substrate 215.

Polarizing plates 201 and 211 are attached to the outer sides of the color filter substrate 205 and the array substrate 215. The lower polarizing plate 211 polarizes the light passing through the backlight unit 240 and the upper polarizing plate 201 Polarizes the light passing through the liquid crystal panel 210. [

At this time, the edge side of the liquid crystal panel 210 in which the color filter substrate 205 and the array substrate 215 are bonded together can be sealed with a sealing material 248 through side sealing. However, the present invention is not limited thereto. Further, as shown in FIG. 12, the upper polarizer 201 may be attached so as to cover a part of the sealing material 248, but the present invention is not limited thereto.

A light source 232 for generating light is provided on one side of the light guide plate 242 and a reflection plate 241 is provided on the back surface of the light guide plate 242. [ Can be installed.

A plurality of optical sheets 243 for illuminating the liquid crystal panel 210 can be disposed on the upper surface of the light guide plate 242 by improving the efficiency of light emitted from the light guide plate 242.

However, the present invention is not limited to the structure of the above-described backlight unit 240, and any backlight unit 240 of any structure can be applied to the display device 200 according to the present invention.

The light guide plate 242 receives light from the light source 232 and guides the light to the liquid crystal panel 210 side. At this time, light provided from the light source 232 is provided as an incident surface of the light guide plate 242. This incident surface faces the side portion 255a of the heat dissipating metal substrate 255. [ That is, the light source 232 is located on the side portion 255a of the heat dissipation metal substrate 255, and the incident surface of the light guide plate 242 faces the light emitting surface of the light source 232.

The light guide plate 242 may be made of plastic of PMMA or PC.

The reflection plate 241 is positioned between the lower cover 250 and the back surface of the light guide plate 242. The reflection plate 241 reflects light from the light source 232 and light from the light guide plate 242 to the liquid crystal panel 210 side. 11 and 12, the reflection plate 241 includes the periphery of the fifth hole 250 'so as to surround the edge side of the light guide plate 242 (that is, the edge side of the light guide plate 242 excluding the incident surface) However, the present invention is not limited thereto. The reflection plate 241 of the present invention may be formed in substantially the same shape as the shape of the light guide plate 242.

The light source 232 emits light. For example, the light source 232 may be selected from CCFL, HCFL, EEFL, or LED, but the present invention is not limited thereto. Hereinafter, an LED array is used as the light source 232 for convenience of explanation.

The LED array is provided on the side portion 255a of the heat dissipating metal substrate 255 so that the light emitting surface faces the incident surface of the light guide plate 242. [

The light source 232 may be connected to the inverter to receive power and emit light.

The light emitted from the light source 232 is incident on the side surface of the light guide plate 242 of transparent material and the reflection plate 241 disposed on the back surface of the light guide plate 242 transmits the light transmitted through the back surface of the light guide plate 242 to the light guide plate 242, The light is reflected toward the optical sheets 243 on the upper surface to reduce light loss and improve the uniformity.

At this time, the optical sheets 243 include a diffusion sheet 243a and a prism sheet 243b, and a brightness enhancement film 243c such as DBEF and a protective sheet may be added.

The optical sheets 243 may be provided between the upper surface of the light guide plate 242 and the rear surface of the liquid crystal panel 210.

The backlight unit 240 having such a structure is accommodated in the lower cover 250 and the heat-radiating metal substrate 255 of the dual structure according to the present invention.

In other words, like the first embodiment of the present invention, the display 200 according to the second embodiment of the present invention has a guide panel integrated bottom cover 250 as an outer surface of a curved surface, By fastening the metal plate 255 to the lower cover 250, the fastenability is ensured and a narrow bezel of 1.5 mm or less is realized.

The lower cover 250 may include a plurality of side portions 250a extending vertically from the bottom. The side portions 250a may extend vertically to have a predetermined height from the edge of the lower cover 250 except for one side. The edges of the side portions 250a adjacent to each other can be connected to each other.

Each side portion 250a is folded toward the center of the display 200 to form a seating portion 250a 'having a predetermined width and the liquid crystal panel 210 can be seated on the seating portions 250a'.

The space surrounded by the side portions 250a and the seating portions 250a 'forms a storage space in which the backlight unit 240 is housed. That is, it can be seen that the side portions 250a and the seating portions 250a 'are bent in a' C 'shape from the bottom of the lower cover 250. Accordingly, the reflection plate 241, the light guide plate 242 and the optical sheets 243 are accommodated in the lower cover 250, and the curved surfaces of the light guide plate 242 and the optical sheets 243 are curved in a " And can be fixed inside the lower cover 250 by the side portions 250a and the seating portions 250a 'of the lower cover 250. [

The other one side of the reflection plate 241 and the light guide plate 242 and the optical sheet 243 that are not fixed by the lower cover 250 is a heat dissipation metal substrate 255 having the light source 232 mounted on the side 255a ). ≪ / RTI >

That is, when the integral lower cover 250 described above is applied, there is a possibility that the assemblability of internal parts of the backlight unit 240 is lowered and defects such as cracks of the light leakage and the light guide plate 242 may occur. The other one of the light guide plate 242 and the optical sheets 243 is fixed by applying a heat dissipating metal substrate 255 to the lower cover 250, Thereby ensuring fastening properties and realizing a narrow bezel of 1.5 mm or less.

The heat dissipation metal substrate 255 includes a side portion 255a on which the light source 232 is mounted and upper and lower portions 255b and 255c extending toward the light guide plate 242 at the upper and lower ends of the side portion 255a .

The lower portion 255c of the heat dissipation metal substrate 255 faces the upper portion 255b and may extend to the light guide plate 242 and the reflection plate 241 and may be seated on the bottom of the lower cover 250. [

The lower portion 255c of the heat dissipation metal substrate 255 may be provided with a fastening means 256 such as a hook which is inserted into and fastened to the fixing hole 252 of the lower cover 250.

The upper portion 255b of the heat dissipation metal substrate 255 may have a U shape having an insertion groove into which the guide rib 251 of the lower cover 250 is inserted. That is, the insertion groove is opened toward the guide rib 251 of the lower cover 250, and when the heat-radiating metal substrate 255 is inserted into the lower cover 250 and fastened, the side seals 250a ' The guide rib 251 can be inserted and fixed.

The heat dissipation metal substrate 255 is fastened to the fixing hole 252 of the lower cover 250 through the fastening means 256 and the guide rib 251 of the lower cover 250 is inserted through the insertion groove And is fastened to the lower cover 250.

In addition, predetermined shielding tapes 246a and 246b may be provided on the lower cover 250 and the heat-radiating metal substrate 255 having such a structure.

The light shielding tapes 246a and 246b may correspond to the regions of the backlight unit 240 corresponding to the light sources 232 and the edges of the lower cover 250 and the liquid crystal panel 210 may be connected to the lower cover 250 and / And can be fixed to the heat-radiating metal substrate 255. However, the present invention is not limited thereto.

Also, the light-shielding tapes 246a and 246b are formed in black as a whole, so that the light emitted from the backlight unit 240 can be prevented from leaking to the outside.

In the display 200 according to the second embodiment of the present invention configured as described above, the liquid crystal panel 210 includes a display 200 on the basis of a display surface, a display 200 corresponding to an outer shape of a vehicle instrument panel Lt; / RTI > In addition, the mechanism of the backlight unit 240 and the optical components, that is, the optical sheets 243, the light guide plate 242, the reflection plate 231, and the lower cover 250 all correspond to the outer shape of the display 200 And the like. However, the present invention is not limited thereto, and may have a curved shape such as a circular shape or an elliptical shape, a polygonal shape such as a rectangle or rhombus, or a mixed shape of various shapes.

The circular first holes 210 'and the second holes 210' are formed in predetermined left and right regions of the liquid crystal panel 210, the optical sheets 243, the light guide plate 242, the reflection plate 231 and the lower cover 250, Holes 243a ', 243b', and 243c ', a third hole 242', a fourth hole 241 ', and a fifth hole 250' may be formed. However, the present invention is not limited thereto. The first hole 210 ', the second holes 243a', 243b 'and 243c', the third hole 242 ', the fourth hole 241' The fifth hole 250 'may also have a curved shape such as a circular shape or an elliptical shape, or a polygonal shape such as a rectangle or a rhombus, or a mixed shape of various shapes.

The first hole 210 ', the second holes 243a', 243b 'and 243c', the third hole 242 ', the fourth hole 241' and the fifth hole 250 ' 200 may be a hole through which a needle such as a tachometer and a speedometer penetrates.

The liquid crystal panel 210 may display an image in an area other than the first hole 210 'in actual display.

In one example, the first hole 210 'may have a larger diameter than the second holes 243a', 243b ', 243c', and the third hole 242 'and the fourth hole 241' , And the second holes 243a ', 243b', 243c 'and the third holes 242' and the fourth holes 241 'may have diameters larger than the fifth holes 250'.

As described above, a circular fifth hole 250 'may be formed in predetermined left and right regions of the lower cover 250, and a protrusion 250b protruding along the edge of the fifth hole 250' Lt; / RTI >

The protrusion 250b may protrude from the edge of the fifth hole 250 'in the direction of the liquid crystal panel 210.

The height of the protrusion 250b may be equal to or greater than the thickness of the reflector 241 and the thickness of the light guide plate 242 and the optical sheet 243 in relation to the inner surface of the lower cover 250 .

The optical sheets 243a, 243b and 243c, the second holes 243a ', 243b' and 243c 'of the light guide plate 242 and the reflection plate 241 and the third holes 242b 'And fourth holes 241' may be in contact with, or positioned adjacent to, the corresponding side. That is, the protrusion 250b of the lower cover 250 passes through the second holes 243a ', 243b', and 243c ', the third holes 242' and the fourth holes 241 ' 243a, 243b, and 243c, and the light guide plate 242 and the reflection plate 241 are housed in the lower cover 250.

The guide means 245 according to the second embodiment of the present invention is partly installed only in the left and right hole regions while acting as a conventional guide panel .

That is, the present invention is characterized by a partial guide means 245 partially provided only in the hole region, not the guide panel in the form of a square frame surrounding the edge of the display as before.

The guide means 245 according to the second embodiment of the present invention is placed on the protrusion 250b of the lower cover 250 while being fitted in the fifth hole 250'of the protrusion 250b Loses.

The guide means 245 serves to support the liquid crystal panel 210. The guide means 245 includes a cylindrical body 245a into which the liquid crystal panel 210 is inserted, A support portion 245c extending outwardly from the support portion 245c and supporting the edge of the liquid crystal panel 210 to be supported thereon and a fastening portion 245c extending downward from the inner edge of the support portion 245c and fastened to the protrusion 250b of the lower cover 250, (245b).

The body 245a has a cylindrical shape and can be fitted into the first hole 210 'of the liquid crystal panel 210. [

The supporting part 245c has a flat cylinder shape and can extend a predetermined width in an outward direction from the outer circumferential surface of the body 245a and can seat the edge of the liquid crystal panel 210 around the first hole 210 '. At this time, the liquid crystal panel 210, that is, the lower polarizer plate 211, may be seated on the support portion 245c through an adhesive tape (not shown).

The inner diameter of the support portion 245c extends downward to form a cylindrical coupling portion 245b and an outer diameter and an internal diameter of the coupling portion 245b are equal to the outer diameter of the body 245a And can have a smaller size than the inner diameter.

The fastening portion 245b is fastened to the projecting portion 250b of the lower cover 250 and fastened in the X and Y and Z directions so that the projecting portion 250b Male threads 245b 'corresponding to female threads 250b' may be formed. However, the present invention is not limited thereto. When the male thread is formed on the inner side of the protrusion 250b as described above, a female thread corresponding to the male thread of the protrusion 250b is formed on the outer side of the fastening portion 245b . In this case, the guide means 245 is rotated and the fastening portion 245b is inserted into the protrusion 250b of the lower cover 250 and fastened.

When female threads or male threads are formed on the outer side of the protrusions 250b, male threads or female threads corresponding to female threads or male threads of the protrusions 250b may be formed on the inner side of the connecting portion 245b have. In this case, the projecting portion 250b can be inserted and fastened to the inside of the fastening portion 245b.

The female thread 245b 'may be formed to have a certain depth from the lower end of the coupling portion 245b.

As described above, the second embodiment of the present invention applies the cylinder-shaped part guide means 245 to the hole area and also tightens the guide means 245 and the lower cover 250 through the threads 245b 'and 250b' Thereby making it unnecessary to form hooks on the outer side of the lower cover or to form hooks on the sides of the lower cover. Accordingly, the fastening property between the guide unit 245 and the lower cover 250 is secured, thereby preventing detachment and breakage of the optical sheets 243 and rattle noise due to component flow.

For reference, as described above, the present invention is also applicable to a circular display in which the display portion is circular.

The differential display in which the display section is circular is referred to as a circular display, wherein the meaning of the circle includes a substantially circular shape.

A wearable watch with a circular display implements real prototypes. From TFT design to bezel design on the outside of the display, it is being developed as a perfect circular design. This widens the screen area by more than 57% compared to a square display of the same size. Thus, the circular product can display the entire screen to enhance the convenience of the user, and the touch screen can be made thin even though the thickness is thin.

A terminal can be divided into a mobile / portable terminal and a stationary terminal depending on whether the terminal is movable, and the wearable watch belongs to a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

As the functions of such terminals are diversified, for example, photographing or video shooting, music or video file playback, games. Reception of broadcasts, and the like. Further, it may be considered to improve the structural and software parts of the terminal to support and enhance the functions of the terminal.

Recently, mobile terminals have evolved into various types of designs due to such improvements, and wearable watch type mobile terminals that can be fixed to the user's body have been developed.

Thus, the display of the present invention can be applied to a wearable watch. Here, the hour, minute, second, and other mechanisms of the watch may be positioned on the upper surface of the liquid crystal panel through the holes.

That is, the display of the present invention has a circular structure as a whole, and a hole is formed so that the instrument can be penetrated, so that the display can be applied to an electronic device for displaying a donut-shaped area such as a watch.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

110, 210: liquid crystal panel 141, 241:
142,242: light guide plate 143,243: optical sheet
145, 455: guide means 145a, 245a:
145b, 245b: fastening portions 145c, 245c:
150, 250: lower cover 150a, 250a:
150a ', 250a': a seating part 150b, 250b:
151, 252: guide lip 152, 252:
155, 255: heat-radiating metal substrate 155a, 255a:
155b, 255b: upper part 155c, 255c: lower part
210 ': first hole 241': fourth hole
242 ': third hole 243a', 243b ', 243c': second hole
250 ': fifth hole

Claims (19)

A backlight unit positioned under the liquid crystal panel;
A bottom cover having a plurality of side portions extending vertically from an outer edge of the bottom to receive and enclose the backlight unit in a portion of the outer appearance; And
And a metal substrate that extends inward from upper and lower ends of the side portion and constitutes upper and lower portions, and accommodates and surrounds the backlight unit in the remaining portion of the outer tube,
The side edges of the lower cover are folded inward to form a seating portion, and an outer edge of the liquid crystal panel is seated on the seating portion and the upper portion of the metal substrate,
The metal substrate has a fastening means at a lower portion thereof and is fastened to a fixing hole at the bottom of the lower cover. At the same time, a guide lip protruding from an end of the seating portion of the lower cover through an insertion groove provided in the upper portion ribs are fitted and fixed. The backlight unit according to claim 1,
The light source located at one side of the light guide plate;
A reflection plate disposed on a back surface of the light guide plate; And
And an optical sheet disposed between an upper surface of the light guide plate and a rear surface of the liquid crystal panel. The display according to claim 1, wherein an outer edge of the liquid crystal panel is attached to a seating portion of the lower cover and an upper portion of the metal substrate through a predetermined light-shielding tape coated with an adhesive. The display according to claim 1, wherein an outer edge side of the liquid crystal panel is sealed with a sealing material through a side seal. The display according to claim 4, further comprising an upper polarizer attached above the liquid crystal panel so as to cover a part of the sealing material. delete 3. The display of claim 2, wherein a lower portion of the metal substrate faces the upper portion and extends toward the light guide plate and rests on the bottom of the lower cover. delete delete The display according to claim 2, further comprising at least one hole provided in a predetermined region of the liquid crystal panel and the lower cover. 11. The display of claim 10, further comprising guiding means fastened to the lower cover through the hole. The display according to claim 2, wherein the liquid crystal panel, the optical sheet, the light guide plate, the reflection plate, and the lower cover have a curved shape or a polygonal shape, or a curved shape and a polygonal shape. 12. The method of claim 11,
A first hole provided in the liquid crystal panel;
A second hole provided in the optical sheet;
A third hole provided in the light guide plate;
A fourth hole provided in the reflection plate; And
And a fifth hole provided in the lower cover. 14. The display according to claim 13, wherein the first to fifth holes have a curved shape or a polygonal shape, or a curved shape and a polygonal shape. 14. The display of claim 13 wherein the bottom cover has a protrusion vertically protruding from the bottom along an edge of the fifth hole. 16. The display according to claim 15, wherein a protrusion of the lower cover passes through the second hole, the third hole and the fourth hole to accommodate the optical sheet, the light guide plate and the reflection plate in the lower cover. 16. The apparatus according to claim 15,
A cylinder-shaped body into which the liquid crystal panel is inserted through the first hole;
A supporting portion extending outwardly from an outer circumferential surface of the body and on which an inner edge of the liquid crystal panel around the first hole is seated; And
And a fastening portion extending downward from an inner edge of the support portion and fastened to a protrusion of the lower cover. 18. The display of claim 17, wherein the guide means comprises a thread corresponding to a thread of the protrusion on the outside of the fastening portion that fits inside the protrusion. The display according to claim 10, wherein the liquid crystal panel has a display unit on which an image is output to a front surface other than the hole.

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