KR20240030093A - Display module for tiling - Google Patents

Abstract

The present invention provides a display module for tiling that not only enables miniaturization for each module but also improves the quality of the display by zero bezel when implementing a large area through tiling. The present invention for this purpose includes a substrate having a display area provided with a plurality of pixels; a driving IC for transmitting driving signals to the plurality of pixels; and a wiring electrically connecting the plurality of pixels and the driving IC, wherein the substrate further has a through hole passing through the wiring, and the driving IC is disposed on the back of the substrate opposite the display area. Disclose the features.

Description

Display module for tiling {DISPLAY MODULE FOR TILING}

The present invention relates to a display module, and more specifically, to a display module for tiling that not only enables miniaturization of the module but also improves the quality of the display by zero bezel when implementing a large area through tiling.

Display devices such as organic light emitting display (OLED) devices and micro LED display devices have decreased in price and improved in performance thanks to the development of process technology and driving technology, and are now used in almost all display devices from small mobile devices to large televisions. It is being applied.

Recently, manufacturers of display devices are making various attempts to implement narrow bezel or zero bezel. That is, by minimizing the bezel area where images are not displayed at the edges of the display panel, the size of the effective screen on which images are displayed can be relatively large in a display panel of the same size.

Figure 1 is an exemplary diagram schematically showing the planar configuration of a conventional display module.

However, as shown in FIG. 1, on one edge of the conventional display panel 10 in the vertical direction D2, there is a gate signal line (GL) wired in the vertical direction D2 to transmit the gate signal to each pixel 15. ) is arranged, and a gate driving IC (Integrated Circuit) (GDIC) connected to the display panel 10 is disposed on one side of the edge in the horizontal direction (D1) of the display panel 10 in the horizontal direction (D1) to transmit data signals to each pixel 15. A data driver IC (DDIC) connected to the data signal line (DL) wired to D1) is disposed. Accordingly, in the bezel area (NPA) in the horizontal direction (D1) or vertical direction (D2) of the display panel 10, the area where the gate driving IC (GDIC) or data driving IC (DDIC) is bonded and the gate driving IC ( A link area connecting each signal line to the GDIC) or data driving IC (DDIC) must be secured. As such, it was impossible or difficult to implement a narrow bezel or zero bezel in the existing display panel 10 due to structural problems.

Figure 2 is an exemplary diagram showing a tiled state of a conventional display module.

And, as shown in FIG. 2, a large-area display panel is implemented by going through a tiling process for a plurality of modular display panels 10. As described above, the bezel area (which exists in each display panel 10) is Due to NPA), the quality of large-area display panels has deteriorated.

Republic of Korea Patent Publication No. 2118153 (announced on June 3, 2020)

The object of the present invention to solve the above-mentioned problems is to provide a display module that not only enables miniaturization of the module but also improves the quality of the display by zero bezel when implementing a large area through tiling.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below. .

A display module for tiling according to an embodiment of the present invention to solve the above-described problem includes: a substrate having a display area provided with a plurality of pixels; a driving IC for transmitting driving signals to the plurality of pixels; and a wiring electrically connecting the plurality of pixels and the driving IC. At this time, the substrate further has a through hole through which the wiring passes, and the driving IC is disposed on the back of the substrate opposite the display area.

At this time, the through hole may be disposed in an area corresponding to the remaining pixels excluding the outermost pixel forming an edge of the display area among the plurality of pixels.

Additionally, the through holes may be arranged in a zigzag shape along the horizontal or vertical direction of the display area.

According to the present invention, by minimizing the bezel area on which images are not displayed at the edge of the display module, the size of the effective screen on which images are displayed in a display module of the same size can be relatively large, and the display module can be miniaturized.

According to the present invention, when implementing a large-area display module through tiling, the quality of the image displayed by zero bezel can be improved.

According to the present invention, the quality of the displayed image can be further improved by lowering the visibility of the through holes by arranging the through holes through which the signal lines are wired in a zigzag shape rather than in a line.

The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Figure 1 is an exemplary diagram schematically showing the planar configuration of a conventional display module.
Figure 2 is an exemplary diagram showing a tiled state of a conventional display module.
Figure 3 is an exemplary diagram schematically showing the planar configuration of a display module according to an embodiment of the present invention.
Figure 4 is an exemplary diagram schematically showing the rear configuration of a display module according to an embodiment of the present invention.
Figure 5 is an exemplary diagram showing a tiled state of a display module according to an embodiment of the present invention.
FIG. 6 is a partially enlarged view of FIG. 3 and is an exemplary view showing the arrangement of through holes according to an embodiment of the present invention.
Figure 7 is a partially enlarged view of Figure 3 and is an exemplary diagram showing the arrangement of through holes according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention, in which the above-described problem to be solved can be concretely realized, will be described with reference to the attached drawings. In describing the present embodiments, the same names and the same symbols may be used for the same components, and additional descriptions may be omitted.

Figure 3 is an exemplary diagram schematically showing the planar configuration of a display module according to an embodiment of the present invention, Figure 4 is an exemplary diagram schematically showing the rear configuration of a display module according to an embodiment of the present invention, and Figure 5 is an example diagram showing a tiled state of a display module according to an embodiment of the present invention.

Referring to Figures 3 to 5, the display module 100 according to an embodiment of the present invention may include a substrate 110, a driving IC, and wiring.

The substrate 110 is a base member for supporting various components of the display module 100 and may be made of an insulating material. For example, the substrate 110 may be made of a material such as glass or polyimide (PI).

The substrate 110 may have a display area. The display area is an area that displays an image, and the display area may be provided with a plurality of pixels 150. The pixel 150 is the minimum unit for displaying an image, and each pixel may be composed of a combination of three subpixels: R, G, and B.

The pixel 150 can be operated by a driving signal provided from a driving IC through wiring. As will be described later, the driver IC may include a data driver IC (DDIC) and a gate driver IC (GDIC), the wiring may include a data line (DL) and a gate line (GL), and the driving signal may include a data signal and a gate line. May contain signals. That is, each pixel 150 is based on a data signal provided from the data driving IC (DDIC) through the data line (DL) and a gate signal provided from the gate driving IC (GDIC) through the gate line (GL). It can work.

The display area may have a display unit for displaying an image and a circuit unit for driving the display unit. For example, if the display module 100 is an organic light emitting display module, the display unit may include an organic light emitting element, but is not limited thereto. The circuit unit may include a thin film transistor, a capacitor, and a wiring terminal. For example, the circuit unit may be composed of various components such as a driving thin film transistor, a switching thin film transistor, a storage capacitor, a gate wiring terminal, and a data wiring terminal, but is not limited thereto. Here, the display area according to this embodiment is disposed on the upper surface of the substrate 110, and a top emission method that transmits light upward in the opposite direction to the substrate 110 may be applied.

The driving IC processes data for displaying images and driving signals for processing the data, and can transmit the processed driving signals to each pixel 150.

The driver IC may include a gate driver IC (GDIC) and a data driver IC (DDIC). The gate driving IC (GDIC) can transmit a gate signal to each pixel 150 through the gate line (GL), and the data driving IC (DDIC) can transmit a data signal to each pixel 150 through the data line (DL). ) can be passed on.

The wiring can electrically connect each pixel 150 and the driver IC.

The wiring may include a gate wiring (GL) and a data wiring (DL). For example, the gate wire GL may be wired in the vertical direction D2 of the substrate 110 . The gate wire GL may be connected to the gate terminal of the thin film transistor to apply a gate signal to each thin film transistor. The data wire DL may be wired in the horizontal direction D1 of the substrate 110 . The data line DL is connected to the source terminal of each thin film transistor and can apply a data signal to each thin film transistor.

In the display module 100 according to this embodiment, a driving IC may be disposed on the back of the substrate 110, opposite the display area, to form a narrow bezel or zero bezel.

In addition, the substrate 110 of the display module 100 according to this embodiment may further have a through hole 101 through which wiring passes. A plurality of through holes 101 may be provided to extend in the horizontal direction (D1) or the vertical direction (D2) and correspond to the number of wires arranged.

As a result, the wiring electrically connecting each pixel 150 and the driving IC can be wired through the through hole 101 of the substrate 110.

According to an embodiment, the through hole 101 may be filled by plating an electrically conductive material such as copper. The plating portion filled in the through hole 101 may form part of the wiring. That is, a portion of the wiring formed on the upper surface of the substrate 110 and a portion of the wiring formed on the rear surface of the substrate 110 may be electrically connected by the plating portion filled in the through hole 101.

In this way, the driver IC is placed on the back of the substrate 110 and the wiring electrically connected to each pixel 150 is wired through the through hole 101 of the substrate 110, so that the edge of the display module 100 The bezel area where the image is not displayed can be minimized (narrow bezel) or the bezel area can be eliminated (zero bezel), and the size of the effective screen on which the image is displayed can be relatively large in the same size display module 100. there is.

And, as shown in FIG. 5, when a large-area display module is implemented through tiling of the display module 100 according to this embodiment, the bezel area between each display module 100 is minimized or zeroed, thereby enabling a large-area display. The quality of the video displayed by the module can be greatly improved.

Meanwhile, the display module 100 can be divided into top emission and bottom emission depending on the light emission method. For example, in front lighting, the substrate is placed at the bottom, and a thin film transistor, an organic light emitting device, and a window are stacked on top of the substrate in that order, so that the light generated from the organic light emitting device is transmitted through the window in the opposite direction of the substrate, and conversely, the back light is transmitted through the window. Light emission is a method in which a window is stacked on the opposite side of the substrate opposite to the organic light emitting device, and light generated from the organic light emitting device is transmitted through the thin film transistor, substrate, and window. Unlike the bottom-emitting method, the front-emitting method has the advantage that it does not matter what shape the circuits on the substrate are configured in, the hidden part is minimized, and the area where light can come out is expanded. In the display module 100 according to this embodiment, the driver IC is disposed on the back of the substrate 110, which is opposite to the display area, so in the case of the bottom-emitting type, the driver IC may be a factor that can deteriorate the image quality of the display. Therefore, the present invention can be effectively used in the top-emitting display module 100.

FIG. 6 is a partially enlarged view of FIG. 3 and is an exemplary view showing the arrangement of through holes according to an embodiment of the present invention.

Referring further to FIG. 6, the through hole 101 of the substrate 110 according to the present invention may be arranged inward from the edge of the display module 100 at a preset distance d1. The interval d1 set here may be the length of one pixel 150 in the horizontal direction D1 or the vertical direction D2.

That is, the through hole 101 of the substrate 110 according to this embodiment may be disposed in an area corresponding to pixels other than the outermost pixel that forms the edge of the display area among the plurality of pixels 150.

In this way, if the through-hole 101 is formed in the area corresponding to the remaining pixels excluding the outermost pixel forming the edge of the display area, when implementing a large-area display module through tiling as shown in FIG. 5, neighboring display modules There is an advantage that durability can be improved by increasing the rigidity of the connection part (boundary part) of (100), and the tiling process can also be simplified.

Also, if a large amount of display modules are first manufactured in the ledger state, and then in the process of cutting and separating the cell-level display module 100 from the ledger, the through hole 101 is located outside the cutting area of the cell-level display module. Because this is maintained, manufacturing of the cell-level display module is easy and high quality can be guaranteed.

Figure 7 is a partially enlarged view of Figure 3 and is an exemplary diagram showing the arrangement of through holes according to another embodiment of the present invention.

Referring further to FIG. 7, a plurality of through holes 101 according to the present invention are provided corresponding to the quantity of wiring extending in the horizontal direction (D1) or the vertical direction (D2), where a plurality of through holes are provided. 101 may not be arranged in a line along the horizontal direction D1 or the vertical direction D2 of the display area of the substrate 110, but may be randomly arranged at any position. Preferably, the plurality of through holes 101 may be provided to have a uniform distribution over the entire display area of the substrate 110. More preferably, the plurality of through holes 101 may be provided to have a uniform distribution over the entire area corresponding to the remaining pixels excluding the outermost pixel forming the edge of the display area among the plurality of pixels 150. there is.

The through hole 101 according to this embodiment may be arranged in a zigzag shape along the horizontal direction D1 or the vertical direction D2 of the display area of the substrate 110.

If a plurality of through holes 101 are arranged in a row along the horizontal direction (D1) or the vertical direction (D2), the visibility of the through holes 101 will be relatively increased, which may deteriorate the quality of the image displayed from the display module. You can.

Therefore, by arranging a plurality of through holes 101 in a zigzag shape along the horizontal direction (D1) or vertical direction (D2), the visibility of the through holes 101 is lowered and the quality of the image displayed on the display module 100 is lowered. can be further increased.

As described above, preferred embodiments of the present invention have been described with reference to the drawings, but those skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. It can be modified or changed.

100: display module
110: substrate
101: Through hole

Claims (3)

A substrate having a display area provided with a plurality of pixels;
a driving IC for transmitting driving signals to the plurality of pixels; and
Includes a wire electrically connecting the plurality of pixels and the driving IC,
The substrate further has a through hole through which the wiring passes,
A display module for tiling, wherein the driver IC is disposed on the back of the substrate opposite the display area. According to paragraph 1,
The through hole is arranged in an area corresponding to pixels other than the outermost pixel forming an edge of the display area among the plurality of pixels. According to paragraph 1,
The display module for tiling, wherein the through holes are arranged in a zigzag shape along the horizontal or vertical direction of the display area.

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