KR102555410B1 - Display Device - Google Patents

Abstract

In the present invention, a through hole is formed to integrally penetrate the liquid crystal panel and the light guide plate, and a fastening part for coupling a display needle is coupled to the through hole. Provided is a display device capable of preventing the dark part from occurring. To this end, a display device capable of providing uniform luminance even around the through-hole is provided by providing at least one or more flat surfaces capable of optimizing light interference of a light source on the fastening part.

Description

Display device {Display Device}

The present invention relates to a display device in which a through hole is provided in the center of a liquid crystal panel to couple a rotating display needle.

In the recent information society, the importance of the display (or display device) as a visual information delivery medium is being emphasized, and in order to occupy an important position in the future, it meets the requirements of low power consumption, thinning, light weight, and high definition. have to do it

The display is a cathode ray tube (CRT) that emits light itself, an electro luminescence (EL), a light emitting diode (LED), a vacuum fluorescent display (VFD), and an electric field emission device. It can be divided into a light emitting type such as a field emission display (FED) and a plasma display panel (PDP), and a non-emissive type such as a liquid crystal display (LCD) that does not itself emit light.

The liquid crystal display is a device that expresses images using the optical anisotropy of liquid crystal. It has excellent visibility compared to conventional cathode ray tubes, average power consumption is smaller than that of a cathode ray tube of the same screen size, and heat dissipation is also small, so it is in the spotlight as a display device. there is.

Such 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 controlling light transmittance of the pixels.

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

1 is a reference diagram schematically showing the structure of a conventional liquid crystal display device, and FIG. 2 is a reference diagram showing luminance when the liquid crystal display device of FIG. 1 is driven.

Referring to FIG. 1, a conventional liquid crystal display device 1 includes a liquid crystal panel 2 in which pixels are arranged in a matrix form to output an image, a driving unit (not shown) for driving the pixels, and a liquid crystal panel 2. It is installed on the rear side of the liquid crystal panel (2) and consists of a light guide plate (3) for emitting light across the entire surface and a backlight unit (5) having a light source (4).

Here, the liquid crystal panel 2 generally includes a color filter substrate facing each other and bonded together to maintain a uniform cell gap, an array substrate, and a liquid crystal layer formed in the cell gap between the color filter substrate and the array substrate. In addition, upper and lower polarizers are attached to the outside of the liquid crystal panel 2, respectively. The lower polarizer polarizes light passing through the backlight unit 5, and the upper polarizer polarizes light passing through the liquid crystal panel 2. .

At this time, a product that deviate from the existing square design, such as a circle, is called a variant display, which literally means that the nature or shape of an object is different from the existing one. That is, the heteromorphic display refers to a display in which a shape is variously transformed, such as a circle or a rhombus, out of the existing rectangular display.

Unlike conventional rectangular displays, release displays are manufactured in various shapes, so the manufacturing process is important. In addition, a very thin bezel that is more trendy and slim than previous products and can satisfy user convenience is required.

In addition, recently, as the utilization of the display gradually increases and is used in various fields, it is necessary to develop a display according to the application field. For example, it is also necessary to consider a case in which one or more through holes 6 through which display hands such as a physical button or a second hand, a minute hand, and an hour hand may pass in the screen area of the display.

However, in this case, as shown in FIG. 2, a large difference in luminance occurs between the front and back of the through hole 6, and also a problem in that a difference in luminance occurs between a part directly exposed to the light of the light source and a part that is not. being pointed out

In order to overcome this, a structure is adopted in which LED modules additionally provided to the backlight unit of FIG. 1 are disposed on both sides, but this causes a problem in that the bezel increases again.

The present invention is intended to solve this problem, and more specifically, in a display device having through-holes, the luminance of the entire liquid crystal panel is uniform by increasing the luminance of the portion where the light of the light source does not directly reach around the through-hole. Its purpose is to provide a display device that allows for

Another object of the present invention is to provide a display device capable of reducing the cost and reducing the bezel compared to the case where the light source is disposed on both sides facing each other by arranging the LED module only on one side of the liquid crystal panel. there is.

In order to solve this problem, the present invention includes a fastening part having at least one flat surface in a through hole integrally penetrating the liquid crystal panel and the light guide plate so that the light of the light source can more efficiently reach the dark part around the through hole. A display device is provided.

In addition, the present invention can provide a display device having uniform luminance by improving the shape of the fastening part to minimize interference in the direction in which the light of the light source travels and improving the luminance difference of the liquid crystal panel due to the fastening part.

In addition, the present invention provides a display device in which the fastening portion reflects or transmits light from a light source toward the dark portion inside the through hole to improve the luminance of the dark portion.

According to the display device of the present invention

First, since the fastening part coupled inside the through-hole of the liquid crystal panel and the light guide plate reduces interference with the light propagation direction of the light source, the dark part around the through-hole can be minimized,

Second, it is possible to provide uniform luminance on the liquid crystal panel by improving the light source arrangement structure of the backlight unit.

Third, the image quality can be improved while reducing the bezel compared to the case where the LED module is provided on both sides by arranging the LED module on only one side at the bottom of the liquid crystal panel,

Fourth, since the fastening part reflects the light of the light source inside the fastening part and directly transfers it to the dark part, there is an effect of transmitting light regardless of the size or position of the dark part.

1 is a reference diagram schematically showing the structure of a general liquid crystal display device.
FIG. 2 is a reference diagram illustrating luminance displayed when the liquid crystal display of FIG. 1 is driven.
3 is a front view illustrating a portable terminal equipped with a display device according to a first embodiment of the present invention.
FIG. 4 is an exploded perspective view illustrating the display device shown in FIG. 3 in a separated state;
FIG. 5 is a reference diagram illustrating a driving state of the display device shown in FIG. 4 .
6 and 7 are reference views illustrating fastening parts of the display device shown in FIG. 5 .
FIG. 8 is a reference diagram illustrating luminance of the display device shown in FIG. 5 .
9 and 10 are cross-sectional views illustrating another embodiment of the fastening part of the display device shown in FIG. 5 .
11 is a cross-sectional view illustrating a fastening part of a portable terminal equipped with a display device according to a second embodiment of the present invention.
FIG. 12 is a reference diagram illustrating a movement path of light inside a fastening part of the display device shown in FIG. 11 .
FIG. 13 is a reference view illustrating an embodiment in which the shape of the light receiving member of the fastening part shown in FIG. 12 is modified.
FIG. 14 is a reference view illustrating an embodiment in which only half of the reflective members of the fastening part shown in FIG. 12 are provided.
FIG. 15 is a reference view illustrating an embodiment in which a plurality of light output members of the fastening unit shown in FIG. 12 are provided.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described so that those skilled in the art can easily implement it. It should be noted that the drawing numbers indicated on the components in the accompanying drawings use the same reference numbers as much as possible when indicating the same components in other drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. And certain features presented in the drawings are enlarged, reduced, or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

3 is a front view illustrating a portable terminal equipped with a display device according to a first embodiment of the present invention.

Referring to FIG. 3 , a wearable watch will be described as an example of a handheld terminal 10 . Of course, it may be applied as a mobile/portable terminal or a stationary terminal depending on whether it is movable or not, and may be applied as a vehicle mount terminal among mobile terminals. Here, the stationary terminal may be applied as a vehicle speedometer or a dashboard displaying RPM.

In such a portable terminal 10, a through hole (refer to FIG. 4, 111) must be formed in the center of the liquid crystal panel 100 so that the display hands 11 such as hour, minute and second hands can rotate. In addition, a fastening part (refer to FIG. 4, 140) is coupled to guide the coupling of the indicator needle 11 on the through hole.

In addition, a mounting means 12 such as a band or a chain is provided so that the portable terminal 10 can be worn on a wrist.

FIG. 4 is an exploded perspective view showing the display device shown in FIG. 3 in a separated state, and FIG. 5 is a reference view showing a driving state of the display device shown in FIG. 4 .

4 and 5, the display device 100 according to the first embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120, and a liquid crystal panel 110 and the backlight unit 120. It includes a housing 130 for accommodating and a fastening part 140 coupled to the through hole 111 integrally penetrating the liquid crystal panel 110 and the light guide plate 121 .

In the liquid crystal panel 110, pixels are arranged in a matrix form to output an image, and a color filter substrate 112, an array substrate 113, and a color filter substrate 112 are bonded to each other so as to maintain a uniform cell gap. and a liquid crystal layer (not shown) formed in the cell gap between the array substrate 113 .

In addition, the backlight unit 120 includes a light guide plate 121 disposed under the liquid crystal panel 110, an LED module disposed on one side of the light guide plate and provided with a plurality of light sources for generating light, and provided on the rear surface of the light guide plate 121. It includes a reflector 123. Here, the LED module of the backlight unit 120 is disposed on one side of the housing 130 .

A plurality of optical sheets 123 are provided on the upper surface of the light guide plate 121 to improve the efficiency of light emitted from the light guide plate 121 and radiate it to the liquid crystal panel 110 . Of course, the present invention is not limited to the structure of the backlight unit 120 described above, and any structure of the backlight unit 120 may be applied to the display device 100 according to the present invention.

The light guide plate 121 receives light from the light source 126 and guides the light toward the liquid crystal panel 110 . The light guide plate 121 may be made of PMMA or PC plastic material.

The reflector 123 is positioned between the housing 130 and the rear surface of the light guide plate 121 . The reflector 123 reflects the light from the light source 126 and the light from the light guide plate 121 toward the liquid crystal panel 110 . Light emitted from the light source 126 is incident on the side of the light guide plate 121 made of a transparent material, and the reflector 123 disposed on the rear surface of the light guide plate 121 transmits the light transmitted to the rear surface of the light guide plate 121 through the light guide plate 121. The light is reflected in the direction of the optical sheets 124 on the upper surface to reduce loss of light and improve uniformity of luminance.

In this case, the optical sheets 124 include a diffusion sheet 1241 and a prism sheet 1242, and a brightness enhancement film 1243 such as DBEF and a protective sheet (not shown) may be added. The optical sheets 124 may be provided between the upper surface of the light guide plate 121 and the rear surface of the liquid crystal panel 110 . The backlight unit 120 having such a structure is accommodated inside the housing 130 .

The housing 130 may include a plurality of side parts 131 extending vertically from the bottom. The side part 131 extends vertically from the edge of the housing 130 to have a predetermined height, and may be provided as a plurality of structures instead of a single structure.

Here, the liquid crystal panel 110, the optical sheets 124, the light guide plate 121, the reflector 123, and the housing 130 are formed with a through hole 111 passing through the inner center, and the through hole 111 The fastening part 140 is coupled to. At this time, the through hole 111 is formed to integrally penetrate at least the liquid crystal panel 110 and the light guide plate 121 .

As the fastening part 140 is coupled to the through hole 111, the coupling position of the liquid crystal panel 110, the optical sheets 124, the light guide plate 121 and the reflector 123 or the housing 130 is fixed. In addition, at least one surface of the fastening part 140 is formed as a flat surface, and a function of equalizing luminance around the through hole 111 is accompanied.

Referring to FIG. 5 , an LED module 125 having a plurality of light sources 126 is disposed on one side of the light guide plate 121 . In this case, each light source 126 is disposed on only one side of the light guide plate 121 . Therefore, compared to the arrangement of the LED modules 125 on both sides of the light guide plate 121, a bezel (not shown) can be reduced.

The light source 126 radiates light from one side of the light guide plate 121 to the other side. At this time, the LED module 125 has a first light source 1261 on the left side of the through hole 111, a second light source 1262 on the right side, and a third light source 1263 on the left side of the first light source 1261. and a fourth light source 1264 further to the right of the second light source 1262 .

The first light source 1261 and the second light source 1262 radiate light toward a set point toward the center of the other side of the light guide plate 121 . The third light source 1263 emits light parallel to the first light source 1261, and the second light source 1262 emits light parallel to the fourth light source 1264. Accordingly, the light emitting surfaces 127 of the first light source 1261 and the third light source 1263 are disposed at the same angle, and the light emitting surfaces 127 of the second light source 1262 and the fourth light source 1264 are disposed at the same angle. are placed Then, since the first light source 1261 to the fourth light source 1264 are arranged to radiate a uniform amount of light as a whole from one side of the light guide plate 121, uniform luminance can be obtained, and thus image quality does not vary. It has an equalizing effect.

Of course, as shown in FIG. 5 , the first light source 1261 to the fourth light source 1264 are arranged according to the curvature of the light guide plate 121 while one side surface of the light guide plate 121 is curved. , The LED module 125 may be disposed in a plane, and the light guiding plate 121 may be provided in a plane so that the light emitting surfaces 127 may all be disposed in parallel at the same angle. Although this case is not separately shown in the drawing, the effect of equalizing luminance caused by improving the shape of the fastening portion 140 to be described later can be realized almost the same.

In addition, the first light source 1261 to the fourth light source 1264 may have one side surface of the light guide plate 121 curved and disposed with a curvature different from that of the light guide plate 121 to emit light. In this case, a structure (not shown) identical to or similar to a separate light guide plate may be added to compensate for the curvature of the light guide plate 121 and the curvature in which each light source 126 is disposed.

6 and 7 are reference views illustrating a fastening portion of the display device shown in FIG. 5 , and FIG. 8 is a reference view showing luminance of the display device shown in FIG. 5 .

Referring to FIG. 6 , the fastening part 140 of the display device according to the first embodiment of the present invention has a substantially hollow cylindrical shape and is inserted into the through hole 111 and coupled thereto. A hole is formed inside the fastening part 140 so that the indicator needle (refer to FIG. 3, 11) is coupled thereto. In this case, the fastening part 140 may be made of a transparent material like the light guide plate 121 to minimize interference of light around the through hole 111 .

Further, the fastening part 140 is provided with at least one flat surface facing the other side surface of the light guide plate 121 . This plane provides a function of increasing luminance around the through hole 111 by partially cutting the thickness of the fastening portion 140 and reflecting or passing light from the light source 126 through the cut portion.

First, the fastening part 140 includes a first plane 141 and a second plane 142 adjacent to each other. The first plane 141 and the second plane 142 are formed such that the thickness of the fastening part 140 is thin within a range capable of maintaining the shape of the fastening part 140 . When the first flat surface 141 and the second flat surface 142 are provided on the fastening part 140 in this way, an empty space 122 is formed between the fastening part 140 and the through hole 111 . When such an empty space 122 is formed, a light splash phenomenon occurs between the fastening part 140 and the light guide plate 121 depending on the density difference according to the material or the angle difference between the light guide plate 121 and the fastening part 140, thereby forming a through hole. (111) There is an effect of increasing the luminance of the peripheral area.

Also, as shown in FIG. 7 , at least one reflective member 1411 is provided on the first plane 141 and the second plane 142 . The reflective member 1411 may be integrally formed of the same material as the fastening part 140, and may be separately combined with an additional component having a high reflectance. The reflective member 1411 also provides a function of increasing the luminance of this area by reflecting light around the through hole 111 . Of course, the reflective member 1411 may be arranged in various patterns, and more reflective members 1411 may be positioned adjacent to a portion where the first plane 141 and the second plane 142 meet each other. .

The reflective member 1411 may be formed in a substantially hemispherical shape, and one surface may be flat or a concave or convex reflective surface may be formed to reflect light from the light source 126 toward the liquid crystal panel 110. there is. In addition, a reflective pattern (not shown) such as a mirror may be provided on the reflective surface of the reflective member 1411 to increase the reflectance of light.

Then, as shown in FIG. 8, the dark portion around the through hole 111 is significantly reduced, and the luminance is increased at approximately 3 to 5 o'clock and 7 to 9 o'clock, while the conventional display device in FIG. 2 above. It can be seen that the luminance is uniformly improved as a whole, compared to the luminance of , which is intensively increased only in the 10 to 2 o'clock direction.

9 and 10 are cross-sectional views illustrating another embodiment of the fastening part of the display device shown in FIG. 5 .

First, referring to FIG. 9 , the fastening part 140 is provided with a third plane 143 at a portion where the first plane 141 and the second plane 142 are adjacent to each other.

In this way, when the first plane 141 to the third plane 143 are provided, the thickness of the upper part of the through hole 111, that is, the through hole 1111 adjacent to the other side of the light guide plate is reduced, and the light of the light source is reduced. The part where the fastening part interferes with respect to the moving direction is further reduced. Accordingly, an area of the dark portion may be reduced, and thereby uniformity of luminance may be further increased.

At this time, as the upper thickness of the fastening part 140 is greatly reduced, a problem may occur in fixing the coupling position of the fastening part 140 inside the through hole 1111 . Here, the light guide plate has a through hole 1111 formed in a shape corresponding to at least one of the first plane 141 to the third plane 143 of the fastening part 140 . That is, while the through hole 1111 is not simply a cylindrical hole, but is filled so that a partial plane is provided therein, the coupling position of the fastening part inside the through hole 1111 is restricted. Of course, as shown in FIG. 9, since the shape of the through hole 1111 and the shape of the outer circumferential surface of the fastening part 140 are identical to each other, the change in the shape of the fastening part 140 not only increases the luminance, but also the through hole (1111) It is possible to solve even the coupling structure for fixing the fastening part 140 inside.

In FIG. 10, a design capable of realizing the minimum function of the fastening part 140 is made by reducing the upper thickness more than that of the fastening part of FIG. In addition, since the upper outer circumferential surface of the fastening part 140 and the inner circumferential surface of the through hole 1112 are formed as curved surfaces, there is an effect of minimizing interference in the direction in which the light of the light source travels, and thus the increase in luminance is more could be improved

According to the display device of the present invention, since the interference of the fastening part coupled to the inside of the through hole is reduced in the traveling direction of the light source, the dark part around the through hole can be reduced, and the light source arrangement structure of the backlight unit 120 can be reduced. It is possible to provide a uniform luminance as a whole on the liquid crystal panel 110 by improving the liquid crystal panel 110, and by arranging the LED module on only one side at the bottom of the liquid crystal panel 110 to reduce the bezel compared to the case of having the LED module on both sides. The effect of improving image quality can be expected.

FIG. 11 is a cross-sectional view showing a fastening part of a portable terminal equipped with a display device according to a second embodiment of the present invention, and FIG. 12 is a reference view showing a movement path of light inside the fastening part of the display device shown in FIG. 11 . , FIG. 13 is a reference view illustrating an embodiment in which the shape of the light receiving member of the fastening part shown in FIG. 12 is modified.

Referring to FIGS. 11 to 13 , the fastening part 240 of the display device 200 according to the second embodiment of the present invention has a substantially hollow cylindrical shape and is inserted into the through hole 111 and coupled thereto. A hole for implementing additional functions is formed inside the fastening part 240 . Such a hole may be applied to a through hole 111 for combining a watch needle, a camera module, a flash module, or a sensor such as a proximity sensor or an illuminance sensor.

The fastening part 240 includes a light receiving member 241 for introducing light from a light source into the through hole 111, a reflecting member 242 for reflecting the light of the light receiving member 241 toward the dark part, and a reflecting member 242. ) includes a light output member 243 that emits light from 0 to the dark part direction.

The light receiving member 241 is disposed on the through hole 111 to face the direction of the light source. As described above, since the fastening part 240 is made of the same or similar material as the light guide plate 121, it can effectively move or reflect light. Therefore, the light receiving member 241 provides a function of receiving light emitted from the light source and transmitting it to the reflecting member 242 .

In addition, as shown in FIG. 13 , the angle of the contact portion of the light receiving member 2411 and the through hole 111 may be wider so that more light may be introduced from the light source through the light receiving member 2411 . Of course, the angle of the portion contacting the through hole 111 in the direction of the dark part of the light emitting member 243 may be wider so that more light is emitted in the direction of the dark part.

In addition, it is preferable that the light entering members 241 and 2411 and the light exiting member 243 are closely coupled to the inner circumferential surface of the through hole 111 . This is to minimize reflection or absorption of light in this portion by bringing the light guide plate 121 and the fastening portion 240 into close contact as much as possible.

The reflection member 242 has a circular cross section corresponding to the shape of the through hole 111 . The outer circumferential surface of the reflective member 242 is spaced apart from the inner circumferential surface of the through hole 111 by a predetermined distance. Therefore, as shown in FIG. 12 , the light introduced into the light receiving member 2411 is repeatedly reflected along the reflecting member 242 and then emitted toward the dark portion through the light emitting member 243 .

In addition, the reflective member 242 does not correspond to the shape of the through hole 111 and may be implemented in a completely different shape. For example, although the through hole 111 is circular, one cross section of the reflective member 242 can be applied in a rectangular shape, an ellipse shape, or a polygonal shape.

FIG. 14 is a reference view illustrating an embodiment in which only half of the reflection members of the fastening part shown in FIG. 12 are provided.

Referring to FIG. 14 , the reflective member 2421 is provided on only one side of the through hole 111 as the center. That is, the light entering member 241 and the light exiting member 243 are connected to the reflection member 242 in both directions centering on the through hole 111, and the light is transmitted to the dark part through the half of the reflecting member 2421 to pass the light to the dark part. image quality can be improved.

This means that when the size of a configuration such as a camera module inserted together with the fastening part 240 into the through hole 111 is large, the size of the through hole 111 is not increased and a half of the small reflective member 2421 is applied. can In addition, half of the reflection member 2421 may be applied in an area where the difference between light and shade of the dark part is relatively small.

FIG. 15 is a reference view illustrating an embodiment in which a plurality of light output members of the fastening unit shown in FIG. 12 are provided.

The light emitting member 2431 emits the light reflected from the reflective member 242 in the direction of the dark region to improve image quality in the dark region.

At this time, a plurality of light output members 2431 and 2432 on the reflection member 242 may be selectively provided according to the position of the dark part. Of course, a plurality of light receiving members 241 may be provided on the reflective member 242 to correspond to the position or direction of the light source.

If a plurality of light emitting members 2431 and 2432 are provided in this way, a wider range of dark areas can be covered through one fastening part 240, and there is no need to additionally install a light source, making the display device slimmer and thinner. There are advantages that can be

According to the display device of the present invention, since the fastening part coupled inside the through hole reflects light from the light source and transmits it to the dark part, the image quality around the through hole can be improved, and the direction of the light source depends on the size or position of the area of the dark part. Regardless, there is an effect that can be responded to.

Although the above has been described with reference to the drawings as specific embodiments to illustrate the technical idea of the present invention, the present invention is not limited to the same configuration and operational effects as the specific embodiments as described above, and various modified examples are within the scope of the present invention. It can be implemented within the limits that do not deviate from. Therefore, such modifications should also be regarded as belonging to the scope of the present invention, and the true technical protection scope of the present invention will be determined by the technical spirit of the claims described later.

100, 200: display device
110: liquid crystal panel
120: backlight unit
130: housing
140, 240: fastening part

Claims (15)

liquid crystal panel;
a backlight unit including a light guide plate disposed below the liquid crystal panel and an LED module having a plurality of light sources arranged side by side along one side of the light guide plate;
a housing accommodating the liquid crystal panel and the backlight unit; and
A fastening part coupled to a through hole integrally penetrating the liquid crystal panel and the light guide plate;
The fastening part includes a vertical part inserted into the through hole and a horizontal part protruding in a horizontal direction from the vertical part, and the vertical part includes an outer circumferential surface formed of a non-planar surface and a flat surface. The method of claim 1,
The light source includes a first light source emitting light from the left side of the through hole and a second light source emitting light from the right side,
The fastening part includes a first plane provided to prevent interference in a direction in which light from the first light source travels, and a second plane provided so as not to interfere with a direction in which light from the second light source travels. The method of claim 2,
The light source includes a third light source disposed to the left of the first light source and a fourth light source disposed to the right of the second light source,
Light exit surfaces of the first light source and the third light source are disposed at the same angle, and light exit surfaces of the second light source and the fourth light source are disposed at the same angle. The method of claim 3,
The display device wherein the first light source and the second light source have light emission surfaces disposed toward the same set point. The method of claim 3,
At least one side surface of the light guide plate is formed as a curved surface,
The first to fourth light sources are arranged to correspond to one side of the light guide plate. The method of claim 2,
The fastening part,
A display device comprising at least one reflective member protruding on the first plane or the second plane. The method of claim 2,
The fastening part,
A display device comprising a third plane provided at a portion where the first plane and the second plane are adjacent to each other. The method of claim 7,
A display device wherein an empty space is formed inside the through hole between the first and second planes and the through hole. The method of claim 7,
The display device further fills the through hole with the light guide plate to correspond to at least one of the first to third planes. The method of claim 1,
The fastening part is a display device provided with a transparent material. The method of claim 5,
The liquid crystal panel has a circular cross section, the light guide plate has a circular shape corresponding to the shape of the liquid crystal panel, and the housing accommodating the liquid crystal panel and the light guide plate has a circular shape, so that the liquid crystal panel and the light guide plate have a circular shape. The through hole is disposed in the central region of
The first to fourth light sources are arranged side by side on only one side of the light guide plate. delete delete delete delete

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