KR20100000116A - Multi screen apparatus using multi display panel - Google Patents

Abstract

PURPOSE: A multi screen apparatus using a multi display panel is provided to additionally install a sub display panel in a boundary part between main display panels, thereby removing an image non-display area from the boundary part. CONSTITUTION: A sub display panel(20) comprises the following units. A lower chassis(30) comprises a depression unit. Lighting units(35) are installed in the inside of the depression unit. A light guide plate(40) inputs light of the lighting units to emit. An optical sheet(42) of a multilayer is laminated on the lower chassis. An upper chassis fixes an upper outer portion of a glass substrate.

Description

Multi screen apparatus using multi display panel

The present invention relates to a multi-screen device using a multi-display panel, and more particularly, to configure a multi-screen by combining a plurality of main display panels and sub display panels provided at a border portion between the main display panels. The present invention relates to a multi-screen device using multiple display panels having a structure of minimizing front protrusion of the apparatus.

In general, a flat panel display device such as an LCD (Liquid Crystal Display) or a plasma discharge panel (PDP) is easy to implement high resolution, and has various advantages as a large screen display device. However, the flat panel display devices as described above are a problem due to the large-area manufacturing, and the manufacturing cost rises sharply, causing deterioration in image quality due to signal delay.

Therefore, as an alternative to implementing a large display using a single display panel, a multi-screen device combining a plurality of display panels in a matrix form (so-called "Tiled" form) has been put to practical use. For example, an advertisement display installed on a roof of a building, a large display installed on a race track or a casino, a stock market display, or the like constitute a multi-screen device by combining a plurality of large display panels of about 40 inches or larger in a matrix form.

1 illustrates a multi-screen device using a conventional multiple display panel. As shown in the drawing, a plurality of display panels 3 of about 40 inches or more are arranged to have a plurality of rows and columns to configure the multi-screen device 1. At this time, although not shown, each display panel 3 includes a multilayer glass substrate in which liquid crystal is sealed or plasma gas is sealed, and a BLU (Back Light Unit) installed at the rear of the glass substrate to irradiate light. In addition, the bezel 5, which is an external component such as a chassis, is installed at the outside of each display panel 3.

In general, there is an area where a drive IC or other printed circuit is provided outside the glass substrate, and this area is an area where an image is not displayed. In addition, external components, such as a chassis, are involved in assembling the multilayer glass substrate and the BLU. Accordingly, as shown, the bezel 5 inevitably occupies a considerable area outside the front portion of the display panel 3, and in the region where the bezel 5 exists, that is, at the border between the display panels 3. An area where no image is displayed is generated.

Such an image non-display area distorts the image by cutting off the image and causes a problem of deteriorating the continuity of the screen. For example, when displaying the stock market with the conventional multi-screen device 1, there is a problem in that important market information is missing or when the video such as an advertisement is displayed on an outdoor advertising display, the video is disconnected and displayed.

The present invention has been proposed in order to solve the above problems, and comprises a multi-screen by combining a plurality of main display panel, and additionally installed a sub-display panel in the border between the main display panel, the contact of the main display panel The purpose of the present invention is to provide a multi-screen device using a multi-display panel that removes the image non-display area from the neck and improves the screen continuity of the multi-screen device on the screen, and minimizes the front projection of the sub-display panel to structurally stabilize and increase the merchandise. There is this.

Multi-screen device using a multi-display panel of the present invention for achieving the above object, in a multi-screen device using a multi-display panel in which a plurality of display panels are combined to form a single screen, at least one row and column A plurality of main display panels 10 arranged to have a distance from each other, the predetermined gaps 10a being spaced apart from each other; And a bezel 12 outside the main display panel 10 at a border portion between the main display panels 10 and displaying an image to be displayed on the bezel 12 outside the main display panel 10. And a plurality of sub display panels 20, the sub display panel 20 having a recess 32 inserted into a gap 10a formed between the main display panels 10. The lighting unit 35 installed in the chassis 30, the recess 32 of the lower chassis 30, and the lower surface of the lower chassis 30 are installed to receive light from the lighting unit 35. A light guide plate 40 incident on a thickness surface and emitting light, a multilayer optical sheet 42 stacked on the lower chassis 30, and an electrode for image display, stacked on the optical sheet 42. Formed multi-layered glass substrate 45 and the upper outer portion of the glass substrate 45 It characterized in that it is configured to include an upper chassis 50 for pressing and fixing.

According to one embodiment, the luminaire 35 is at least one CCFL.

In this embodiment, one end of the light guide plate 40 to which the light of the luminaire 35 is incident has an enlarged area compared to the other end.

According to another embodiment, the luminaire 35 is a plurality of LEDs.

In the above embodiment, the luminaire 35 includes a first LED group 35a for illuminating the light toward the glass substrate 45 and a second LED for illuminating the light toward the thickness of the light guide plate 40. It consists of a group 35b.

Preferably, at least one optical sheet 42 of the optical sheets 42 is provided with a reducing means 44 for reducing light transmission at a position corresponding to the upper portion of the depression 32.

Preferably, the lower side of the lower chassis 30 is bent to form the bent portion 51 or bent to form the bent portion 53, and the lower portion is formed by the bent portion 51 or the bent portion 53. The image display area of the main display panel 10 positioned below 30 is partially exposed.

More preferably, a reflection sheet 55 is attached or coated to the curved portion 51 or the bent portion 53.

According to the multi-screen apparatus using the multi-display panel of the present invention, by additionally installing a sub-display panel to cover the bezel of the outer edge of the main display panel in the border between the main display panel, the image is disconnected at the border between the main display panel Prevents image distortion and greatly improves the continuity of the screen, and forms a gap between the main display panels and accommodates and installs a part of the BLU configuration of the sub display panel in this gap, Stabilization and minimization of front projection of the sub display panel have the effect of improving the merchandise.

In addition, according to the present invention, when the CCFL is used as the BLU of the sub display panel, the light incidence end of the light guide plate has an enlarged area compared to the other end, so that the light receiving area of the light guide plate is wider and the light efficiency is improved, and ultimately, Has the effect of improving the light uniformity of the BLU.

Further, according to the present invention, when the LED is used as the BLU of the sub display panel, the first LED group for directly illuminating the glass substrate according to the light linearity characteristics of the LED, and the second LED group for illuminating light on the thickness surface of the light guide plate By dividing, it is possible to improve the light efficiency of the BLU and to improve the light uniformity.

In addition, according to the present invention, by coating or attaching a reducing means for reducing light transmission to the optical sheet on the upper portion of the depression in which the lighting means is installed, the light between the area where the light of the lighting means is directly transmitted and the area indirectly transmitted through the light guide plate. There is an effect of improving the uniformity.

In addition, according to the present invention, by forming a bent portion or bent portion on the lower side of the lower chassis to expose the active area of the main display panel overlapping the sub display panel, the image non-display area of the multi-screen device when viewed from various viewing angles There is an effect that can be significantly reduced.

In addition, according to the present invention, the reflection sheet is attached or coated on the bent portion or the bent portion of the lower chassis to increase the effect of reducing the image non-display area.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

First, the present invention relates to a multi-screen device in which a plurality of display panels are arranged to have at least one column and row to constitute a single screen, and each "display panel" constituting a unit screen is a commonly known LCD, PDP, etc. It refers to a display device.

Referring to FIG. 2, the multi-screen device of the present invention is configured such that a plurality of main display panels 10 are arranged in a matrix form on a base plate 14 such as a heat sink, and the like is the same as a general multi-screen device. . Preferably, each of the main display panels 10 has the same size, and the drawings illustrate that four main display panels 10 are combined for convenience of understanding, but in practice, a larger number of main display panels 10 are used. Will be combined.

Although not shown, each main display panel 10 has a structure such as a general LCD or PDP. For example, when the main display panel 10 is an LCD, a liquid crystal is enclosed between a TFT substrate and glass substrates such as a color filter, and a BLU is installed behind the glass substrates. The BLU, as is commonly known, includes a lower chassis, a luminaire such as a CCFL or LED installed inside the lower chassis, a plurality of optical sheets such as a diffusion sheet, a prism, and a brightness enhancement film (BEF), and an outer portion of the uppermost glass substrate. It consists of an upper chassis for pressing and fixing. When the main display panel 10 is a PDP, plasma gas may be enclosed between the glass substrates.

The upper chassis of the BLU constitutes the exterior of the main display panel 10 and is commonly referred to as a "bezel". Accordingly, as illustrated, a bezel 12 is provided outside the main display panel 10, and the bezel 12 corresponds to an image non-display area.

In this case, the multi-screen device of the present invention is arranged such that the main display panels 10 are spaced apart from each other by a predetermined gap 10a from other neighboring main display panels 10. The sub display panel 20 is additionally installed at the border portion between the main display panels 10. As shown in the drawing, the sub display panel 20 has a depression 32 recessed to the rear side in the center of the lower chassis 30, so that the depression 32 is a gap between the main display panels 10. Coupled to be received at 10a. Although not shown, the sub display panel 20 may be coupled to the bezel 12 or the heat sink 14 of the main display panel 10 by fastening means such as bolts or rivets. As another example, the sub display panel 20 may be attached by an attachment means such as a double-sided tape. As another example, the sub display panel 20 may be detachably coupled by an interference fit coupling method.

Referring to FIG. 2, the sub display panel 20 is installed to cover the bezel 12 outside the main display panel 10 at the border portion of the main display panel 10. Preferably, the sub display panel 20 has a width sufficient to partially cover the active area (the area where the actual image is displayed) of the main display panel 10, as shown in FIG. The sub display panel 20 displays an image to be displayed at the border between the main display panels 10.

Preferably, the sub display panel 20 is a display panel of the same type as the main display panel 10. For example, in the process of manufacturing the main display panel 10, the sub display panel 20 may be manufactured using panels that are cut at the outside thereof. In this case, the sub display panel 20 will have pixels of the same size as the main display panel 10. In addition, an additional device such as matching resolution between the main display panel 10 and the sub display panel 20 and synchronizing switching signals may be unnecessary. In this case, however, in the process of installing the sub display panel 20, the operation of adjusting the positions of the rows and columns of pixels between the main display panel 10 and the sub display panel 20 using the unique identification mark is the same. May be involved. In such a pixel positioning process, an electron microscope such as a scanning electron microscope (SEM) may be used.

If the sub display panel 20 is a heterogeneous display panel different from the main display panel 10 and the size of the pixels is different, the area displayed by the sub display panel 20 is much smaller than that of the main display panel 10. It is local and the difference in resolution or image quality between the two will not cause a big visual difference. In addition, compensating for the difference in the resolution or the image quality by the conventionally known control means such as the resolution adjusting device and the synchronization device of the switching signal may be obviously realized by those skilled in the art.

3 to 6 show some embodiments of the sub display panel 20 according to the present invention.

3 and 4, the sub display panel 20 includes a lower chassis 30, a luminaire 35 installed in the lower chassis 30, and a light guide plate installed on a bottom surface of the lower chassis 30. 40, the multilayer optical sheet 42 stacked on the luminaire 35, the multilayer glass substrate 45 stacked on the optical sheet 42, and the outer portion of the glass substrate 45. It consists of an upper chassis 50 which is fixed by pressure.

The lower chassis 30 is an enclosure constituting the exterior of the BLU, and the center portion of the lower chassis 30 is formed with a depression 32 recessed toward the rear side. The depression 32 is inserted and coupled to the gap 10a between the main display panels 10 as shown. That is, the height of the sub display panel 20 protruding toward the front of the multi-screen device is reduced by the depth in which the depression 32 is inserted. The lighting means 35 is installed inside the depression 32. In FIG. 3, the CCFL is installed as the luminaire 35, and the LED is illustrated in FIG. 4.

Referring to the embodiment of Figure 3, one or more CCFL is installed along the longitudinal direction of the depression 32, both ends of the hammer nothing 32 is provided with a socket 37 for installing the CCFL. In this case, the reflective sheet 38 is attached or coated on the bottom of the depression 32. The reflective sheet 38 reflects the light emitted to the bottom of the CCFL toward the glass substrate 45 to increase the light efficiency.

As shown, the light guide plate 40 is installed on the bottom of the lower chassis 30 where the depression 32 is not formed. The light guide plate 40 illuminates the glass substrate 45 in a region where the CCFL is not provided by injecting light emitted from the CCFL into the thickness plane and emitting the surface. At this time, the light guide plate 40 has an area in which the cross-sectional area of the incidence end is extended with respect to the cross-sectional area of the other end in order to receive more light. Therefore, the light-receiving area of the light guide plate 40 is widened, and the light efficiency is improved.

Referring to the embodiment of FIG. 4, it can be seen that the LED is installed as the luminaire 35. When the LED is installed as described above, the lighting means 35 should be designed in consideration of the light straightness characteristic of the LED. Preferably, the luminaire 35 is composed of a first LED group 35a which directly illuminates the glass substrate 45 and a second LED group 35b which illuminates light to both side surfaces of the light guide plate 40.

As shown in the figure, a recessed part 32 is provided with a printed circuit board (PCB) 39, on which one of the first LED group 35a and the second LED group 35b is arranged. It is arranged to have. The first LED group 35a is disposed at the center of the PCB 39 so as to be directed upward of the recess 32, and the second LED group 35b is formed on both sides of the PCB 39 to have a thickness surface of the light guide plate 40. It is arranged to be oriented.

On the other hand, although not shown, as the lighting means 35, other well-known lighting device other than CCFL or LED may be installed.

3 and 4, the optical sheet 42 diffuses the light emitted from the CCFL and the light emitted through the light guide plate 40 and transmits the light to the glass substrate 45. It is a structure for improving the light uniformity of (). At this time, as shown, while the CCFL light is directly transmitted to the optical sheet 42 on the upper portion of the depression 32, indirect light through the light guide plate 40 to the optical sheet 42 on both sides of the depression 32. You can see that it is delivered. That is, the amount of light incident on the central portion of the optical sheet 42 is higher than the amount of light incident on both sides. This may lower the light uniformity of the sub display panel 20.

In order to solve such a problem of light uniformity reduction, the sub display panel 20 of the present invention includes a reduction means 44 for reducing light transmission at the center of the optical sheet 42 positioned above the depression 32. Equipped. For example, the reducing means 44 further attaches a translucent film to the center portion of the optical sheet 42. As another example, the reduction means 44 may be formed in the central portion by sandblasting at least one central portion of the optical sheet 42.

The glass substrate 45 is a substrate on which a thin film transistor (TFT), an anode electrode, or a cathode electrode is printed. In the case of LCD, liquid crystal is encapsulated inside the multilayer glass substrate 45, and in the case of PDP, the multilayer glass substrate is used. Plasma gas is sealed inside 45. A drive IC or the like is mounted on the edge portion of the glass substrate 45, and the upper chassis 50 is coupled to the outer upper portion of the glass substrate 45 as illustrated. The upper chassis 50 is also referred to as "bezel" in other words.

As shown in FIGS. 3 and 4, the sub display panel 20 has a very small size compared to the main display panel 10. Therefore, the sub display panel 20 can design a driver with a smaller IC than the main display panel 10, and the width of the front portion of the upper chassis 50 is very small, so that the image non-display in this portion It is not a big problem. However, since the sub display panel 20 has a protruding structure compared to the main display panel 10, when the viewing angle of the multi-screen device is wide, that is, the multi-display device is viewed from the side, the sub display panel 20 is displayed. Somehow, image disconnection may occur in the region corresponding to the protruding length of.

5 and 6 show an embodiment of removing the image disconnection phenomenon as described above.

As shown in the figure, curved lower portions 51 or bent portions 53 are formed at lower and lower corners of both sides of the lower chassis 30 of the sub display panel 20. The curved portion 51 or the bent portion 53 exposes the active area of the main display panel 10 positioned below the lower chassis 30. For example, images not displayed by the upper chassis 50 of the sub display panel 20 may be displayed at the edge of the active area of the main display panel 10 located below. In this case, the curved portion 51 or the bent portion 53 may expose the images, thereby greatly suppressing the image breakage phenomenon.

More preferably, the reflective sheet 55 may be attached or coated on the curved portion 51 or the bent portion 53. The reflective sheet 55 may reflect an image displayed on the main display panel 10 to generate an effect of minimizing image disconnection at various viewing angles.

As described above, the multi-screen apparatus using the multiple display panel according to the present invention adds a sub display panel 20 covering the bezel 12 outside the main display panel 10 at a border between the main display panels 10. It is configured by installing. The present invention solves the problem that the screen is displayed discontinuously in the conventional multi-screen device, the important information or image is missing, and the entire image is displayed more continuously, as shown in FIG. Has the advantage of greatly improving.

One of the important technical advantages of the present invention is to minimize the front protrusion structure of the sub display panel 20. As described above, the present invention forms a depression 32 behind the lower chassis of the sub display panel 20 and accommodates the depression 32 in the gap 10a between the main display panels 10. . And the lighting means 35 which occupies a comparatively considerable height inside the recessed part 32 is provided. Therefore, the protrusion structure of the sub display panel 20 can be minimized, which provides a great advantage in accelerating the use of the sub display panel 20 according to the present invention in the multi-screen device of the tiled type.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

1 is a front view showing an example of a conventional multi-screen device

Figure 2 is an exploded perspective view showing an example of a multi-screen device according to the present invention

3 is a cross-sectional view illustrating an embodiment of a sub display panel;

4 is a cross-sectional view illustrating another embodiment of a sub display panel;

5 and 6 are cross-sectional views illustrating a lower chassis structure of the sub display panel.

7 is a front view showing one embodiment of the multi-screen device according to the present invention

<Explanation of symbols for the main parts of the drawings>

10: main display panel 10a: gap

12: bezel 14: base plate

20: sub display panel 30: lower chassis

32: depression 35: lighting means

35a: First LED Group 35b: Second LED Group

37: socket 38: reflective sheet

39: PCB 40: light guide plate

42: optical sheet 44: reduction means

45: glass substrate 50: upper chassis

51: curved portion 53: bent portion

55: reflective sheet

Claims (8)

In a multi-screen device using multiple display panels in which a plurality of display panels are combined to form a single screen, A plurality of main display panels 10 arranged to have at least one row and column, and spaced apart from each other by a predetermined gap 10a; And It is installed to cover the bezel 12 outside the main display panel 10 at the border portion between the main display panel 10, a plurality of displays for displaying an image to be displayed on the bezel 12 outside the main display panel 10 Sub display panel 20; is configured to include, The sub display panel 20 includes a lower chassis 30 having a recess 32 inserted into a gap 10a formed between the main display panels 10, and a recess of the lower chassis 30. (32) the lighting means 35 is installed inside, the light guide plate 40 is installed on the bottom surface of the lower chassis 30 and the surface of the light emitting means 35 is incident to the thickness surface and the light emitting, and the lower Multi-layered optical sheet 42 stacked on top of the chassis 30, the multi-layered glass substrate 45 is laminated on the optical sheet 42, the electrode for image display and the glass substrate 45 Multi-screen device using a multi-display panel, characterized in that it comprises an upper chassis (50) for pressing and fixing the upper outer portion of. The method of claim 1, The lighting means (35) is a multi-screen device using a multiple display panel, characterized in that at least one CCFL. The method of claim 2, One end of the light guide plate 40 to which the light of the illumination means 35 is incident, the multi-screen device using a multiple display panel, characterized in that it has an area larger than the other end. The method of claim 1, The lighting unit 35 is a multi-screen device using a plurality of display panels, characterized in that a plurality of LEDs. The method of claim 4, wherein The lighting means 35 includes a first LED group 35a for illuminating the light toward the glass substrate 45 and a second LED group 35b for illuminating the light toward the thickness surface of the light guide plate 40. Multi-screen device using a multiple display panel, characterized in that consisting of. The method according to any one of claims 1 to 5, At least one optical sheet 42 of the optical sheets 42 is provided with a reducing means 44 for reducing the light transmission at a position corresponding to the upper portion of the depression 32 Multiscreen device with panel. The method according to any one of claims 1 to 5, The lower side of the lower chassis 30 is bent to form the bent portion 51 or bent to form the bent portion 53, and the lower portion of the lower chassis 30 is bent by the bent portion 51 or the bent portion 53. Multi-screen apparatus using a multi-display panel, characterized in that the image display area of the main display panel 10 located in the partially exposed. The method of claim 7, wherein The curved portion 51 or the bent portion 53 is a multi-screen device using a multi-display panel, characterized in that the reflective sheet 55 is attached or coated.

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