KR20200017088A - Display device - Google Patents

Abstract

The present invention provides a display device which comprises: a light guide plate formed with a camera hole; a camera inserted into the camera hole; and a light transmission ring inserted into the camera hole to enclose the periphery of the camera, inducing light generated from a light input part to move the light along a circumferential area of the camera hole, and transmitting the light to a light output part to emit the light.

Description

Display device

The present invention relates to a display device, and more particularly to a display device having a camera.

In today's information society, the importance of display device or display device as visual information transmission medium has to be emphasized, and in order to occupy a major position in the future, it is necessary to satisfy requirements such as low power consumption, thinning, light weight, and high quality. .

The display itself is a cathode ray tube (CRT), an electroluminescent element (EL), a light emitting diode (LED), a vacuum fluorescence display (VFD), an electric field emission A light emitting type such as a field emission display (FED), a plasma display panel (PDP) and the like, and a non-light emitting type such as a liquid crystal display (LCD) cannot emit light.

Among the various displays, the liquid crystal display is an apparatus that expresses an image by using optical anisotropy of liquid crystal. Since the display is superior to conventional CRTs, the average power consumption is small and heat dissipation is small compared to CRTs having the same screen size. It is spotlighted as a display.

Such a liquid crystal display may implement an image in such a manner that a light source is disposed under the liquid crystal and an electric field is applied to the liquid crystal to control the arrangement of the liquid crystal to control the transmittance of light generated from the light source. The liquid crystal display device is applied to various electronic equipment such as a smartphone and a tablet PC. In particular, the liquid crystal display includes a liquid crystal panel disposed under a cover glass, a backlight unit disposed under the liquid crystal panel, and a cover bottom for accommodating or supporting the liquid crystal panel or the backlight unit. .

In recent years, the display of thin bezels and ultra-thin displays has been increasing in demand for thin and light display devices.

Recently, display devices in mobile devices have gone beyond the slim bezel to implement a narrow bezel in which the width of the bezel is reduced as thin as possible to maximize the visible area of the liquid crystal panel in the device.

However, when the liquid crystal panel is extended to the front of the device to implement the narrow bezel in the display having the camera, it may be extended to the area where the camera is installed. In this case, the liquid crystal panel, the polarizing plate, and the backlight unit of the camera hole area where the camera is installed should be perforated or made transparent.

The present invention is to provide a display device that can remove the dark portion of the camera hole region in the narrow bezel display having a camera and can prevent light leakage.

In order to solve this problem, the present invention is a light guide plate formed with a camera hole; A camera inserted into the camera hole; And a light transmission ring inserted into the camera hole to surround the camera to move light generated from the light incident part to move along the circumferential area of the camera hole and to transmit the light to the light exit part. To provide.

The light transmission ring may include an incident part through which light is introduced from the light incident part; A turning part configured to move the light introduced from the incident part along a peripheral area of the camera hole; And an emission unit configured to emit light moved along the turning unit to the light exit unit.

The incident part and the exit part may include at least one linear plate.

The incident part includes a first linear plate disposed at one side of the camera hole to be perpendicular to the light flowing from the light incident part; And a second linear plate and a third linear plate connected to both sides of the first linear plate so as to be inclined at a predetermined angle with the first linear plate.

A third linear plate disposed at the other side of the camera hole to be parallel to the light incident part; And a fourth linear plate and a fifth linear plate connected to both sides of the third linear plate to be inclined at a predetermined angle with the third linear plate.

A pattern for diffusing light may be formed on at least one surface of the incident part and the exit part.

The pattern may be at least one of a dot pattern and a prism pattern.

The turning part may include a pair of curved plates connecting the incidence part and the exit part.

The pivot portion may include a first curved plate connecting the linear plate of the incident part and one side of the exit part linear plate, respectively; And a second curved plate connecting the linear plate of the incidence part and the other side of the emission part linear plate, respectively.

The light transmission ring may have the same size as the thickness of the light guide plate.

A total reflection coating may be formed inside the light transmission ring.

The total reflection coating may be performed by any one of silver reflective coating, non-conductive vacuum deposition (NCVM) deposition, reflector sheet insertion, and white printing.

The light transmission ring may include at least one material of polycarbonate (PC, Polycarbonate), polymethyl methacrylate (PolyMethylMethacrylAte), glass, silicon, UV resin, and UV resin. have.

The light transmission ring may include a material having a refractive index of 1.49 to 1.6.

According to the display device of the present invention, by installing the light transmission ring in the camera hole region of the light guide plate, it is possible to remove the dark portion of the camera hole region and implement a narrow bezel that can prevent light leakage.

1 is a front view of (a) the front view and (b) the cover glass and the top cover of the apparatus of the display with the camera of the embodiment.
FIG. 2 is a perspective view of the AA region of FIG. 1;
3 is a schematic plan view of the camera hole area of the embodiment.
4 is a perspective view of an embodiment of the light transmission ring of FIG. 3.
FIG. 5 is a plan view of FIG. 4 showing a light transmission process.
6 shows the dark part of the camera hole area where the light transmission ring is not used.
7 is a perspective view of another embodiment of a light transmission ring.
8 is a simulation test result for the case in which the light transmission ring (a) is not mounted in the camera hole (b).

Hereinafter, the embodiments will be apparent from the accompanying drawings and the description of the embodiments. In the description of an embodiment, each layer, region, pattern, or structure may be “under” or “under” the substrate, each layer, region, pad, or pattern. In the case where it is described as being formed at, "up" and "under" include both "directly" or "indirectly" formed through another layer. do. In addition, the criteria for up / down or down / down each layer will be described with reference to the drawings.

In the drawings, sizes are exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size. Like reference numerals denote like elements throughout the description of the drawings. Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings.

1 is a front view of (a) the front view and (b) the cover glass and the top cover of the apparatus of the display with the camera of the embodiment, and FIG. 2 is a perspective view cut away from the area A-A of FIG.

Referring to FIG. 1, the display device 1 according to the embodiment includes a camera 2 on the front surface, and the bezel is made as thin as possible to widen the visible area of the liquid crystal panel 200 covered with the cover glass 10 as much as possible. It implements a narrow Narrow Bezel.

The cover glass 10 may be provided with a protective film (not shown) on the upper surface. In addition, the cover glass 10 may include a touch panel (not shown). Such a touch panel is a pressure-sensitive type that closely installs a sensor string responding to pressure applied to a surface, and detects a position by coordinates when a pressure is applied, and charges the surface of the cover glass 10 and installs sensors around the contact. It can be applied capacitively by detecting the loss of charge at the time and identifying where the contact is made.

An upper polarizer 110 is positioned below the cover glass 10 as shown in FIG. 1B, and a through hole H is formed in the upper polarizer 110 for the operation of the camera 2. do.

As shown in FIG. 2, the through hole H formed in the upper polarizer 110 may have a position and size corresponding to the camera hole CH in which a camera (not shown in FIG. 2) is installed.

The liquid crystal panel 200 is positioned between the through hole H and the camera hole CH, and the liquid crystal panel 200 is positioned between the through hole H and the camera hole CH. It can have

The liquid crystal panel 200 outputs an image by arranging pixels in a matrix form, and combines the color filter substrate 210, the array substrate 220, and the color filter substrate 210 so that a uniform cell gap is maintained to face each other. And a liquid layer (not shown) in which a cell gap between the array substrate 220 is formed.

The color filter substrate 210 may include a color filter composed of a plurality of sub-color filters that implement red, green, and blue (RGB) colors, and a black that distinguishes between the sub-color filters and blocks light transmitted through the liquid crystal layer. Matrix, and an overcoat layer formed on the color filter and the black matrix.

The array substrate 220 has gate lines and data lines arranged vertically and horizontally to define pixel regions, and thin film transistors (TFTs), which are switching elements, are formed at the intersections of the gate lines and the data lines. . The thin film transistor includes a gate electrode connected to a gate line, a source electrode connected to a data line, and a drain electrode connected to a pixel electrode.

The common electrode and the pixel electrode are formed on the liquid crystal panel 200 where the color filter substrate 210 and the array substrate 220 are bonded to each other, and an electric field is applied to the liquid crystal layer. The voltage of the data signal to be controlled can be controlled. Then, 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 to transmit or block light for each pixel to display characters or images. In this case, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching element such as a thin film transistor is separately provided in the pixels.

The transparent part 230 may have a shape and a size corresponding to the camera hole CH and the through hole H, and may maintain a transparent state so that the camera 2 can take a picture. For example, the transparent unit 230 may transparently control a portion of the liquid crystal panel 200 by adjusting a sub filter of the color filter substrate 210 layer.

Polarizers 110 and 120 may be attached to upper and lower ends of the color filter substrate 210 and the array substrate 220, respectively. In this case, the lower polarizer 120 polarizes the light passing through the backlight unit 300 toward the array substrate 220, and the upper polarizer 110 polarizes the light passed through the liquid crystal panel 200.

The backlight unit 300 may include a light guide plate 320 disposed under the liquid crystal panel 200, a plurality of optical sheets 310 that enhance the efficiency of light emitted from the light guide plate 320 and irradiate the liquid crystal panel 200. The reflection plate 330 may be included.

The light guide plate 320 receives light from a light source (not shown) and guides the light toward the liquid crystal panel 200. The light guide plate 320 may be made of a plastic material such as polymethyl methacrylate (PMMA, PolyMethylMethacrylAte) or polycarbonate (PC, Polycarbonate).

The optical sheet 310 includes a diffusion sheet and a prism sheet, and a brightness enhancing film and a protective sheet, such as DBEF, may be added. The optical sheet 310 may be provided between the upper surface of the light guide plate 320 and the rear surface of the liquid crystal panel 200.

The reflective plate 330 is positioned between the cover bottom 400 and the rear surface of the light guide plate 320. The reflector 330 reflects the light emitted from the light source and the light reflected from the light guide plate 320 toward the liquid crystal panel 200. The light emitted from the light source is incident on the side of the light guide plate 320 made of a transparent material, and the reflective plate 330 disposed on the rear surface of the light guide plate 320 transmits light transmitted through the rear surface of the light guide plate 320 to the optical on the upper surface of the light guide plate 320. By reflecting toward the sheet 310, light loss is reduced and luminance uniformity is improved.

The backlight unit 300 including the above-described configuration is accommodated in the cover bottom 400. The backlight unit 300 is not limited to the above-described structure, and the backlight unit 300 having any structure may be applied to the display device 1 according to the present invention.

The cover bottom 400 may accommodate the backlight unit 300 and the guide panel 180 therein and support the liquid crystal panel 200 described above. For example, the cover bottom 400 may be formed of a bottom portion and a side portion only to minimize and slim the bezel area. That is, the cover bottom 400 may include a bottom portion having a rectangular plate shape and a side portion portion protruding upward from a side of the bottom portion by a predetermined height. Of course, the above-described cover bottom 400 is merely exemplary and may be applied to the display apparatus 1 according to the present invention even if the cover bottom 400 having various shapes.

In the display device 1 according to the exemplary embodiment, a through hole H is formed in the upper polarizer 110, and a camera hole CH in which the camera 2 is installed is formed through the backlight unit 300 and the cover bottom 400. do. The transparent part 230 of the liquid crystal panel 200 is positioned between the through hole H and the camera hole CH.

FIG. 3 is a schematic plan view of the camera hole region of the embodiment, FIG. 4 is a perspective view of one embodiment of the light transmission ring of FIG. 3, FIG. 5 is a plan view of FIG. 4, and FIG. The darkening of the camera hole area where no light transmission ring is used is shown.

Referring to FIGS. 3 to 6, the display device 1 according to the embodiment can suppress the generation of dark areas around the camera hole CH and prevent light leakage.

Referring to FIG. 3, a camera hole CH may be penetrated through the light guide plate 320, and a camera 2 may be inserted into the camera hole CH. The light transmission ring 500 may be inserted into the camera hole CH to surround the camera 2.

The light transmission ring 500 may introduce light generated from the light incident part where the light source, such as the LED, is located, move along the circumferential region of the camera hole CH, and transmit the light to the light exiting part.

For example, the light transmission ring 500 may include at least one of polycarbonate (PC), polymethyl methacrylate (PMMA (PolyMethylMethacrylAte), glass, silicon, and UV resin). It may include a material.

That is, the light transmission ring 500 may be made of a transparent material, and may have a refractive index of 1.49 to 1.6 similar to that of the light guide plate 320. In addition, the light transmission ring 500 may have the same size as the thickness of the light guide plate 320. Therefore, the light transmission ring 500 may perform light transmission in the camera hole CH area in harmony with the light guide plate 320.

As shown in FIGS. 4 and 5, the light transmission ring 500 may be implemented in a ring shape including the incidence part 510, the turning parts 530 and 540, and the emission part 520. .

The incidence part 510 forms an area where light enters from the light incidence part, and the turning parts 530 and 540 move the light introduced from the incidence part 510 along the circumferential area of the camera hole CH, and the emission part. 520 serves to emit the light moved along the turning parts 530 and 540 to the light exiting part.

The light transmission ring 500 increases the amount of light flowing from the light incident part by using light properties such as straightness, refraction, and reflection of the light, and changes the path through the turning parts 530 and 540 to emit the light to the light exiting part. It can provide the effect of improving dark areas.

In more detail, the incident part 510 may include at least one linear plate. For example, the linear plate constituting the incident part 510 may be disposed at one side of the camera hole CH to be perpendicular to the light flowing from the light incident part as shown in FIG. 5.

If the incident part 510 includes a linear plate perpendicular to the light flowing from the light incident part, the light may be introduced into the light transmission ring 500 by widening the inflow area of the light emitted from the light incident part.

In addition, patterns 511 and 512 may be formed on one surface of the incident part 510 to diffuse light. In the exemplary embodiment, patterns 511 and 512 are formed on both the outer and inner surfaces of the linear plate forming the incident part 510. The patterns 511 and 512 may include any one of a dot pattern and a prism pattern.

The dot pattern may be implemented in a form in which a plurality of hemispherical protrusions whose cross sections are seen as dots are arranged on the surface. The dot pattern may be referred to as embossing or polka dot pattern.

The prism pattern may mean that a plurality of prism-shaped protrusions are disposed on the surface. For example, the prism pattern may be referred to as a V-cut pattern or a U-cut including a triangular prism-shaped protrusion and a semi-cylindrical protrusion.

As described above, the incident part 510 including the patterns 511 and 512 may be moved to the turning parts 530 and 540 by maximally increasing the incident efficiency of light.

The exit unit 520 may include at least one linear plate like the incident unit 510. The linear plate constituting the emission unit 520 may be disposed at the other side of the camera hole CH in parallel with the light incident unit as shown in FIG. 5.

If the output unit 520 includes a linear plate arranged in parallel with the incidence unit 510, by increasing the surface area of the light flowing out to the light exit unit, more light may be emitted to improve the dark unit.

In addition, patterns 521 and 522 for diffusing light may be formed on one surface of the emission unit 520. In the embodiment, it is shown that the patterns 521 and 522 are formed on both the outer surface and the inner surface of the linear plate constituting the exit portion 520. The patterns 521 and 522 may include any one of a dot pattern and a prism pattern. The emission unit 520 including the patterns 521 and 522 may increase the emission efficiency of light to the maximum.

That is, the incident part 510 and the exit part 520 may include linear plates having the same pattern or different patterns in order to increase the incident or emitted amount of light.

The turning parts 530 and 540 may include a pair of curved plates that connect the incident part 510 and the exit part 520 and are disposed inside the camera hole CH. For example, the curved plate may have a curvature corresponding to the curvature of the camera hole CH. The turning parts 530 and 540 may move the light exiting part 520 by refracting and reflecting the light flowing from the incident part 510.

For example, the pair of curved plates 530 and 540 may include a first curved plate 530 connecting the left side of the incident part 510 and the left side of the exit part 520, and the right side of the incident part 510. And a second curved plate 540 connecting the right side of the exit unit 520.

The light transmission ring 500 including such a configuration may be inserted into the camera hole CH penetrating the light guide plate 320 to operate as shown in FIG. 5.

Referring to FIG. 5, when the display apparatus 1 is operated, light generated from the light incident part is transmitted to the light transmission ring 500 mounted in the camera hole CH. In this case, since the light has a straightness, since the incident part 510 of the light transmission ring 500 is implemented as a linear plate disposed to be perpendicular to the light flowing from the light incident part, a lot of light may be introduced.

Since the patterns 511 and 512 are formed on both side surfaces of the linear plate forming the incident part 510, the incoming light may be efficiently refracted and reflected to move to the turning parts 530 and 540.

Since the turning parts 530 and 540 include a pair of curved plates connected to the left and right sides of the incident part 510, respectively, the light passing through the incident part 510 may be respectively connected to the first curved plate 530. It may move toward the exit unit 520 while turning along the second curved plate 540.

The exit unit 520 may be implemented as a linear plate having patterns on both sides, similar to the incident unit 510, and may be disposed at the other side of the camera hole CH in parallel with the light incident unit. Therefore, the output unit 520 may improve the dark part by letting out more light by widening the surface area of the light flowing out to the light exiting part.

That is, in the display device that does not include the light transmission ring 500 as shown in FIG. 6, the light part of the light incident part is not transmitted to the rear of the camera hole CH so that the dark part D occurs. Can be improved.

7 is a perspective view of another embodiment of a light transmission ring.

Referring to FIG. 7, the light transmission ring 500a may be modified in the shape of the incident parts 510a, 531a, and 541a and the exit parts 520a, 532a, and 542a differently from the above-described embodiment.

That is, the incident portions 510a, 531a, and 541a may include the first linear plate 510a disposed to be perpendicular to the light of the light incident portion, and the first linear plate 510a to be inclined at an angle with the first linear plate 510a. The second linear plate 531a and the third linear plate 541a may be connected to both sides of the, respectively.

The patterns 511a, 512a, 531a-1, 531a-2, 541a-1, and 541a-2 are also provided on both sides of the first linear plate 510a, the second linear plate 531a, and the third linear plate 541a, respectively. This can be formed.

The light emitting parts 520a, 532a, and 542a are arranged on the fourth linear plate 520a disposed to be perpendicular to the light of the light exit part, and both sides of the fourth linear plate 520a to be inclined at an angle with the fourth linear plate 520a. And a fifth linear plate 532a and a sixth linear plate 542a, respectively.

In addition, patterns may be formed on both side surfaces of the fourth linear plate 520a, the fifth linear plate 532a, and the sixth linear plate 542a, respectively.

The turning parts 530-1 and 540-1 may include a first curved plate 530-1 connecting the second linear plate 531a and the fifth linear plate 532a, and a third linear plate 541a. The second curved plate 540-1 connecting the sixth linear plate 542a may be formed.

At this time, in the present embodiment, the total reflection coating 600 may be formed inside the light transmission ring 500.

The total reflection coating 600 may be formed by any one of silver reflective coating, non-conductive vacuum deposition (NCVM) deposition, reflector sheet insertion, and white printing on the inner surface of the light transmission ring 500. Can be.

For example, the total reflection coating 600 is formed on both inner surfaces of the light transmission ring 500 or the inner surface of the turning portions 530 and 540, the inner surface of the incident portion 510, and the inner surface of the emitting portion 520. Etc. may be selectively made on at least one side.

The light transmission ring 500 in which the total reflection coating 600 is formed may increase the amount of light emitted by the emission unit 520 by increasing the light reflection efficiency, as well as light leakage from which light leaks toward the camera hole CH. The phenomenon can be prevented.

The total reflection coating 600 of this embodiment may be applied to the above-described embodiment.

8 is a simulation test result for the case in which the light transmission ring (b) is not mounted in the camera hole (a).

Referring to FIG. 8A, the light leakage region Z is observed in the camera hole CH region in which the light transmission ring 500 is not mounted, and a dark portion D is generated behind the camera hole CH. I can see that.

On the other hand, referring to Figure 8 (b), when the light transmission ring 500 is mounted in the camera hole (CH), the dark portion (D1) does not occur at the rear of the camera hole (CH), the light leakage area (Z1) It can also be seen that it is not observed.

Thus, according to the display device of the present invention, by inserting the light transmission ring into the camera hole region, it is possible to remove the dark portion of the camera hole region and implement a narrow bezel that can prevent light leakage phenomenon.

The display device according to the embodiment of the present invention described above may be applied to various electronic equipment such as a TV, a smartphone, a tablet PC, and the like.

Features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in each embodiment may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be interpreted that the contents related to such a combination and modification are included in the scope of the present invention.

1: display device 2: camera
H: Through Hole CH: Camera Hole
10: cover glass 110: upper polarizing plate
120: lower polarizer 200: liquid crystal panel
210: color filter substrate 220: array substrate
230: transparent portion 300: backlight unit
310: optical sheet 320: light guide plate
330: Reflector 400: Cover Bottom
500: light transmission ring 510: incident part
520: exit part 530, 540: turning part
511, 512, 521, 522: Pattern 510a: First linear plate
531a: second linear plate 541a: third linear plate
520a: fourth linear plate 532a: fifth linear plate
542a: sixth linear plate 530, 530-1: first curved plate
540, 540-1: Second curved plate 600: Total reflection coating

Claims (14)

A light guide plate on which a camera hole is formed;
A camera inserted into the camera hole; And
And a light transmission ring inserted into the camera hole to surround the camera to move light generated from the light incident part to move along the circumferential area of the camera hole and to transmit the light to the light exit part. The method of claim 1,
The light transmission ring,
An incident part through which light is introduced from the light incident part;
A turning part configured to move the light introduced from the incident part along a peripheral area of the camera hole; And
And a light emitting unit which emits light moved along the turning unit to the light emitting unit. The method of claim 2,
And the incident part and the exit part comprise at least one linear plate. The method of claim 3,
The incident portion
A first linear plate disposed at one side of the camera hole to be perpendicular to the light flowing from the light incident part; And
And a second linear plate and a third linear plate respectively connected to both sides of the first linear plate so as to be inclined at an angle with the first linear plate. The method of claim 3,
The exit section
A third linear plate disposed on the other side of the camera hole to be parallel to the light incident part; And
And a fourth linear plate and a fifth linear plate respectively connected to both sides of the third linear plate to be inclined at an angle with the third linear plate. The method of claim 3,
And a pattern for diffusing light on at least one surface of the incident part and the exit part. The method of claim 6,
And the pattern is at least one of a dot pattern and a prism pattern. The method of claim 3,
And the turning part includes a pair of curved plates connecting the incidence part and the exit part. The method of claim 8,
The turning part
A first curved plate connecting the linear plate of the incidence part and one side of the exit part linear plate, respectively; And
And a second curved plate connecting the linear plate of the incidence part and the other side of the emission part linear plate, respectively. The method of claim 1,
And the light transmitting ring has the same size as the thickness of the light guide plate. The method of claim 1,
A display device having a total reflection coating formed inside the light transmission ring. The method of claim 11,
The total reflection coating is performed by any one of silver reflective coating, non-conductive vacuum deposition (NCVM) deposition, reflector sheet insertion, and white printing. The method of claim 1,
The light transmission ring includes at least one material of polycarbonate (PC, Polycarbonate), polymethyl methacrylate (PolyMethylMethacrylAte, PMMA, Glass, Silicon, and UV Resin). Display device. The method of claim 13,
The light transmission ring comprises a material having a refractive index of 1.49 to 1.6.

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