KR102037694B1 - Flexible display device and method for manufacturing thereof - Google Patents

Abstract

The present invention relates to a display device, and more particularly, to provide a flexible display device and a method of manufacturing the same, which can reduce a bezel width. To this end, the flexible display device according to the present invention includes a display panel including a first substrate including a plurality of pixels and formed of a flexible material, and a second substrate facing and bonded to the first substrate; A driving integrated circuit for converting the image data and the timing synchronizing signal transmitted from the control panel into a data signal and a gate signal and supplying the data signal to the display panel; And a cushioning member disposed between the bottom surface of the display panel and the driving integrated circuit disposed in the bottom direction of the display panel as the bending portion formed in the non-display area of the first substrate is bent.

Description

Flexible display device and manufacturing method therefor {FLEXIBLE DISPLAY DEVICE AND METHOD FOR MANUFACTURING THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a flexible display device and a method of manufacturing the same, capable of reducing bezel width.

In general, a flexible display device is a next-generation display device because a pixel cell is implemented on a thin flexible substrate such as plastic to display a desired image even when folded or rolled like paper. Attention is being paid to research and development. Such a flexible display device may include a flexible liquid crystal display device, a flexible plasma display device, a flexible organic light emitting display device, and a flexible electrophoretic display device. flexible electrophoretic display devices, or flexible electro-wetting display devices.

1 is a cross-sectional view schematically illustrating a general flexible display device.

Referring to FIG. 1, a general flexible display apparatus includes a display panel 10 and a panel driver 20.

The display panel 10 includes an opposing lower substrate 12 and an upper substrate 14.

The lower substrate 12 is made of a thin flexible substrate such as plastic. The lower substrate 12 includes a display area including a plurality of pixels for displaying an image, a non-display area surrounding the display area, and a pad part provided at one side of the non-display area.

For example, in the display area, a gate line and a data line defining a pixel area are formed to cross, a thin film transistor is formed in an area where the gate line and the data line intersect, and a pixel electrode connected to the thin film transistor is a pixel. It is formed in the area. The pad part is formed in one non-display area of the lower substrate 12 to be connected to the gate line and the data line, respectively, and is connected to the panel driver 20.

The upper substrate 14 is made of a thin and transparent flexible substrate such as plastic, and is formed to have a relatively smaller area than the lower substrate 12. The upper substrate 14 is bonded to the lower substrate 12 except for the pad portion of the lower substrate 12 by a bonding member (not shown) formed in a closed loop shape in the non-display area of the lower substrate 12.

An optical film (not shown) may be attached to an upper surface of the upper substrate 14. In this case, the optical film may have a function such as anti-reflection for preventing polarization and / or reflection of external light.

The panel driver 20 is connected to the pad of the lower substrate 12 to supply a signal to the gate line and the data line. To this end, the panel driver 20 may include a flexible circuit board 21, a driving integrated circuit 23, a control board 25, and a driving circuit unit 27.

The flexible circuit board 21 is attached to the pad portion of the lower substrate 12 and bent to the bottom surface of the lower substrate 12 to surround the side surface of the lower substrate 12.

The driving integrated circuit 23 is mounted on the flexible circuit board 21. The driving integrated circuit 23 generates a data signal and a gate signal for displaying an image on the display panel 10 based on the image data and the timing synchronization signal provided from the control board 25. Supply.

The control board 25 is attached to the flexible circuit board 21 and disposed on the bottom surface of the lower board 12. The control board 25 is connected to a control board (not shown) for generating image data and timing synchronization signals corresponding to an image to be displayed on the display panel 10, and the image data and timing supplied from the control board. The synchronous signal is transmitted to the driving integrated circuit 23 through the flexible circuit board 21.

The driving circuit unit 27 is mounted on the control substrate 25 and includes a passive element such as a resistor, a capacitor, an inductor, and / or an integrated circuit (IC), and the like, and the display panel 10 and / or The voltage necessary for driving the driving integrated circuit 23 is generated.

Such a conventional flexible display apparatus displays a desired image on the display panel 10 by driving each pixel of the display panel 10 according to the driving of the panel driver 20.

However, in the conventional flexible display apparatus, the panel driver 20, that is, the flexible circuit board 21 is bent to surround the side surface of the lower substrate 12, and thus, a part of the flexible circuit board 21 and the bending part 21a are caused. ) Is disposed on the side of the display panel 10, the bezel width W increases due to one side of the lower substrate 12, a part of the flexible circuit board 21, and the bending portion 21a. have.

In addition, since the conventional flexible display apparatus uses the flexible circuit board 21 and the control board 25, the production cost increases due to the increase in the number of parts, and the flexible circuit board 21 is attached to the lower substrate 12. Yield may be reduced due to the bonding process and the bonding failure caused by the bonding process of attaching the control board 25 to the flexible circuit board 21.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a flexible display device and a method of manufacturing the same, which reduce the bezel width.

According to an aspect of the present invention, there is provided a flexible display apparatus including a first substrate including a plurality of pixels and formed of a flexible material, and a second substrate facing and bonded to the first substrate. ; A driving integrated circuit for converting the image data and the timing synchronizing signal transmitted from the control panel into a data signal and a gate signal and supplying the data signal to the display panel; And a cushioning member disposed between the bottom surface of the display panel and the driving integrated circuit disposed in the bottom direction of the display panel as the bending portion formed in the non-display area of the first substrate is bent.

According to an aspect of the present invention, there is provided a method of manufacturing a flexible display, the method including: manufacturing a display panel by bonding a first substrate and a second substrate to each other and including a plurality of pixels and formed of a flexible material; A driving integrated circuit for bending a bending part formed in the non-display area of the first substrate to convert the image data and the timing synchronization signal transmitted from the control panel into a data signal and a gate signal and supply the converted data signal to the display panel; Disposing in the bottom direction of the display panel; And fixing the driving integrated circuit to a cushion member disposed on a bottom surface of the display panel.

According to the present invention, since the first substrate constituting the display panel is directly bent and connected to the control plate, the bezel width of the display panel can be reduced.

In addition, according to the present invention, since the cushion member is disposed between the bottom of the display panel and the driving integrated circuit, the phenomenon in which the driving integrated circuit collides with the bottom of the display panel and is damaged can be prevented.

In addition, according to the present invention, the bending portion of the first substrate may be fixed in a predetermined form by an adhesive or a curing agent.

1 is a cross-sectional view schematically showing a general flexible display device.
2A is a plan view illustrating a flexible display device according to a first exemplary embodiment of the present invention.
2B and 2C are cross-sectional views taken along line A1-A2 of FIG. 2A;
2D is another cross-sectional view of the flexible display device according to the first embodiment of the present invention.
3A to 3D are various exemplary views illustrating a cross section of the flexible display device according to the second embodiment of the present invention.
4A and 4B illustrate various cross-sectional views of a flexible display device according to a third embodiment of the present invention.
5A to 5D illustrate various cross-sectional views of a flexible display device according to a fourth embodiment of the present invention.
6A to 6D illustrate various cross-sectional views of a flexible display device according to a fifth embodiment of the present invention.
7 is an exemplary view illustrating a cross section of a flexible display device according to a sixth embodiment of the present invention.

Hereinafter, a flexible display device and a method of manufacturing the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2A is a plan view illustrating a flexible display device according to a first embodiment of the present invention, and FIGS. 2B and 2C are cross-sectional views taken along the line A1-A2 of FIG. 2A. 2B illustrates a form before the first substrate 110 is bent during the manufacturing process of the flexible display device according to the first embodiment of the present invention, and FIG. 2C illustrates a display panel in which the first substrate 110 is bent. The form bent to the back of (100) is shown. FIG. 2D is another cross-sectional view of the flexible display device according to the first embodiment of the present invention, and illustrates a state in which the control board MLB is connected to the panel driver.

2A to 2D, the flexible display device according to the first embodiment of the present invention includes a first substrate 110 including a plurality of pixels and formed of a flexible material, and the first substrate 110. The display panel 100 having the second substrate 120 bonded to the display panel 100 and the control panel 700 convert the image data and the timing synchronization signal into a data signal and a gate signal to the display panel 100. As the integrated circuit 210 for supplying and the bottom of the display panel 100 and the bending unit 115 formed in the non-display area of the first substrate 110 are bent, the display panel 100 is bent. And a cushion member 500 disposed between the driving integrated circuits 210 disposed in the bottom direction of the driving integrated circuit 210. here. The driving integrated circuit 210 is included in the panel driver.

First, the display panel 100 will be described.

The display panel 100 may be a flexible flat panel display device. In the following description, the present invention is described assuming that the display panel 100 is an organic light emitting display panel of a flexible organic light emitting display device among the flexible flat panel display devices.

The display panel 100 includes a first plate 110 and a second substrate 120 that are opposed to each other, a back plate 130 formed on the bottom surface of the first substrate 110, a light blocking member 140, and a second substrate. It is configured to include an optical film (not shown) formed on the upper surface of the substrate 120.

The first substrate 110 is a flexible substrate, and may be made of a plastic material or a metal foil. That is, since the first substrate 110 is formed of a flexible material, it may be bent as shown in FIGS. 2C and 2D.

For example, the first substrate 110 made of plastic is made of any one of polyimide (PI), polycarbonate (PC), polynorborneen (PNB), polyethyleneterephthalate (PET), polyethylenapthanate (PEN), and polyethersulfone (PES). Can be. The first substrate 110 includes a display unit, a non-display unit, a bending unit 115, and a pad unit 116.

The display unit of the first substrate 110 includes a plurality of gate lines (not shown), a plurality of data lines (not shown), a plurality of driving power lines (not shown), a plurality of pixels (not shown), and a cathode power line ( Not shown).

Each of the plurality of gate lines is formed at regular intervals to cross each of the plurality of data lines, and each of the plurality of driving power lines is formed to be parallel to each of the plurality of gate lines or the plurality of data lines.

Each of the plurality of pixels is formed in a pixel region defined by intersecting gate lines and data lines to display an image according to a gate signal from the gate line and a data signal from the data line. To this end, each of the plurality of pixels includes a pixel driving circuit (not shown) connected to the gate line and the data line, and an organic light emitting element (not shown) connected to the pixel driving circuit and connected to the cathode power line.

The pixel driving circuit includes a switching transistor (not shown) connected to the gate line and the data line, a driving transistor (not shown) connected to the switching transistor, and a capacitor (not shown) connected to the gate electrode and the source electrode of the driving transistor. Is done.

The pixel driving circuit supplies a data signal supplied to the data line to the driving transistor according to the switching of the switching transistor according to the gate signal supplied to the gate line, and stores the gate-source voltage of the driving transistor corresponding to the data signal in the capacitor. do.

By turning on the driving transistor with the voltage stored in the capacitor, a data current corresponding to the data signal is supplied to the organic light emitting diode. The transistor may be a thin film transistor (a-Si TFT), a poly-Si TFT, an oxide TFT, an organic TFT, or the like.

The pixel driving circuit may further include at least one compensation transistor and at least one compensation capacitor for compensating the threshold voltage of the driving transistor.

The organic light emitting device includes a pixel electrode (or anode) connected to a driving transistor, an organic light emitting layer (not shown) formed on the pixel electrode, and a cathode electrode (not shown) formed on the organic light emitting layer. The organic light emitting device emits light having a luminance corresponding to the data current toward the upper portion of the second substrate 120 by emitting light by a current flowing from the pixel electrode to the cathode by turning on the driving transistor.

The cathode power line may be formed on the entire surface of the display unit to be electrically connected to the cathode electrode of each pixel, or may be formed in a pattern form to be electrically connected to the cathode electrodes of the pixels formed on the vertical or horizontal lines of the display unit. Such a cathode power line may be formed to be electrically connected to the organic light emitting layer of each pixel, in which case the cathode electrode is omitted.

The non-display unit is provided in a peripheral area of the display unit to surround the display unit. Here, the non-display portion may be defined as an area overlapping the edge portion of the second substrate 120.

On one side of the non-display portion, a plurality of gate lines, a plurality of data lines, a plurality of driving power lines, and a plurality of link lines (not shown) electrically connected to each of the cathode power lines are formed.

The bending part 115 extends to have a predetermined area from one side of the non-display part and is bent toward the bottom surface of the first substrate 110. That is, the bending part 115 is bent to have a predetermined curvature by a substrate bending device (not shown) and overlaps the lower portion of one side of the second substrate 120. The bending part 115 is provided with a plurality of extension lines (not shown) electrically connected to each of the plurality of link lines.

The pad portion 116 of the first substrate 110 is electrically connected to the first flexible circuit board 200 of the panel driver.

Meanwhile, in FIG. 2C, the bending part 115 is bent to be spaced apart from the lower surface of the light blocking member 140 by a predetermined step, but is not limited thereto. The bending part 115 may be in close contact with the lower surface of the light blocking member 140. It may be folded. In this case, the thickness of the display panel 100 may be minimized.

The second substrate 120 of the display panel 100 is made of a transparent plastic material and is formed to have a relatively smaller area than the first substrate 110. The second substrate 120 is opposed to the inside of the bending part 115 of the first substrate 110 by a bonding member (not shown) formed in a closed loop shape on a non-display portion of the first substrate 110. do.

The bonding member opposes the first substrate 110 and the second substrate 120 and protects the organic light emitting device from external moisture or oxygen, and the first substrate 110 and the second substrate 120. Seal the space between.

The back plate 130 is formed on the bottom surface of the first substrate 110, and the light blocking member 140 is formed on the bottom surface of the back plate 130. The light blocking member 140 blocks light emitted from the display unit 112 of the first substrate 110 from traveling downward of the first substrate 110.

The light blocking member 140 may be formed of a coating layer made of black tape or a light blocking material. The light blocking member 140 includes a first flexible circuit board 200 and a second flexible circuit board 300 on which a lower surface of the first substrate 110 and a panel driver are formed except for the bending part 115 of the first substrate 110. It is formed to overlap with.

The optical film is formed to have a function such as antireflection to prevent reflection of polarized light and / or external light and is attached to the upper surface of the second substrate 120. Such an optical film may be omitted.

Next, the panel driving unit will be described.

The panel driver may include a first flexible circuit board 200, a second flexible circuit board 300, a driving integrated circuit, and the like.

A chip on film (COF) may be applied to the first flexible circuit board 200, and the driving integrated circuit may supply a data signal and a gate signal for emitting pixels of the display panel 100 to the first flexible circuit board 200. The circuit 210 is mounted.

The flexible printed circuit (FPC) may be applied to the second flexible circuit board 300, and the driving elements for supplying image data and timing synchronization signals input from the control board 700 to the driving integrated circuit 210 may be surface mounted. And a protection cap 310 for protecting the driving elements.

The protection cap 310 not only functions to protect the driving elements by covering the driving elements mounted on the second flexible circuit board 300, but also supports the display panel 100 and prevents electrical connection between the driving elements. It performs the function.

One side of the first flexible circuit board 200 is electrically connected to the pad portion 116 of the first substrate 110, and the other side thereof is connected to the second portion through the pad portion 220 of the first flexible circuit board 200. It is electrically connected to the flexible circuit board 300.

The driving integrated circuit 210 is mounted on the first flexible circuit board 200 by a chip bonding process or a surface mounting process and bonded to the plurality of signal supply terminals and the plurality of signal input terminals.

The driving integrated circuit 210 generates a data signal and a gate signal based on image data and a timing synchronization signal supplied from the outside through the plurality of signal input terminals, and generates the generated data signal and the gate signal to a corresponding signal supply terminal. By supplying and driving each pixel formed in the display unit of the first substrate 110, an image corresponding to the image data is displayed on the display unit.

As shown in FIG. 2B, the driving integrated circuit 210 may be formed on the bottom surface of the first flexible circuit board 200. In this case, as shown in FIG. 2C, when the bending part 115 of the first substrate 110 is bent, the driving integrated circuit 210 is positioned between the bottom surface of the display panel and the first substrate 110.

Meanwhile, as shown in FIG. 2B, the driving elements may be formed on the top surface of the second flexible circuit board 300. In this case, as shown in FIG. 2C, when the bending part 115 of the first substrate 110 is bent, the bottom surface of the second flexible circuit board 300 is attached to the back plate 130 or the light blocking member by the adhesive member. 140, that is, attached to the bottom surface of the display panel, and the top surface of the second flexible circuit board 300 faces downward.

As described above, driving elements may be formed on one surface of the second flexible circuit board 300, and the other surface may be attached to the back plate 130 or the light blocking member 140 through an adhesive member.

Since the second flexible circuit board 300 is attached to the bottom surface of the back plate 130, the elastic restoring force of the bending part 115 may be restrained, and the shape of the bent portion 115 may be maintained as it is.

Finally, the cushion member 500 will be described.

As described above, when the bending part 115 of the first substrate 110 is bent, the driving integrated circuit 210 is positioned between the bottom surface of the display panel and the first substrate 110. In this case, the cushion member 500 is disposed between the display panel and the driving integrated circuit 210 to prevent the driving integrated circuit 210 from directly contacting the bottom surface of the display panel. The bottom of the display panel may be the bottom of the first substrate 110, the bottom of the back plate 130, or the bottom of the light blocking member 140.

That is, the cushion member 500 prevents the driving integrated circuit 210 from directly contacting the bottom surface of the display panel 100. In this case, it is possible to prevent the display panel 100 or the driving integrated circuit 210 from being damaged by the cushion member 500.

The cushion member 500 may be formed of various materials having a cushion. For example, the cushion member 500 may be formed of latex, sponge, urethane foam which is a foamable resin, EVA, silicone, or the like. In addition, the cushion member 500 may be formed in the form of a tape having a cushion.

The cushion member 500 includes a first surface in contact with the display panel 100 and a second surface opposite to the first surface.

The cushion member 500 may be attached to the bottom surface of the display panel 100 by a double-sided tape or an adhesive attached to the first surface of the cushion member 500. In addition, the cushion member 500 may be directly attached to the light blocking member 140 to which the adhesive material is applied.

Since the cushion member 500 has elasticity, when the cushion member 500 is in close contact with the driving integrated circuit 210, the second surface of the cushion member 500 is pressed in the direction of the first surface, and the driving integrated circuit 210 naturally forms the cushion member. It may be inserted into the inside of the 500 and fixed.

However, in order to more stably fix the driving integrated circuit 210, a groove 510 into which the driving integrated circuit 210 may be inserted may be formed in the second surface of the cushion member 500.

An additional adhesive may be attached to the groove 510 formed on the entire second surface or the second surface of the cushion member 500 to fix the driving integrated circuit 210. In addition, since the adhesive component is applied to the second surface of the cushion member 500 itself, the driving integrated circuit 210 may be fixed.

The cushioning member 500 and the driving integrated circuit 210 may be closely attached to each other. For example, as the bending unit 115 is bent while the cushion member 500 is attached to the bottom surface of the display panel 100, the driving integrated circuit 210 may be in close contact with the cushion member 500. have. In addition, before the bending part 115 is bent, the bending part 115 is bent while the cushion member 500 is in close contact with the upper end of the driving integrated circuit 210, and the first surface of the cushion member 500 is bent. Alternatively, the first surface of the cushion member 500 may be attached to the bottom of the display panel 100 by an adhesive attached to the bottom of the display panel 100.

A method of manufacturing the flexible display device according to the first embodiment of the present invention including the above-described configuration will be described below.

First, the first substrate 110 and the second substrate 120 of the display panel 100 are bonded to each other and the back plate 130 is formed on the bottom surface of the first substrate 110.

Second, the first flexible circuit board 200 on which the driving integrated circuit 210 is formed is connected to the pad unit 116 of the first substrate 110. In addition, the second flexible circuit board 300 on which the driving elements are formed is connected to the second flexible circuit board 200.

Third, the bending part 115 of the first substrate 110 is bent, and the first flexible circuit board 200 and the second flexible circuit board 300 are bent toward the bottom surface of the display panel 100.

Fourth, the driving integrated circuit 210 is brought into close contact with the cushion member 500 attached to the bottom surface of the display panel 100. In this case, as described above, the first surface of the cushion member 500 in close contact with the driving integrated circuit 210 may be attached to the bottom surface of the display panel 100.

Fifth, the bottom surface of the second flexible circuit board 300 is attached to the bottom surface of the display panel 100 by using the light blocking member 140 or another attachment material. As the second flexible circuit board 300 is attached to the bottom surface of the display panel 100, the shape of the bent portion 115 may be maintained as it is.

Meanwhile, an adhesive formed of resin may be applied to the outside of the bending part 115, that is, the outer surface exposed to the outside of the bending part 115. Since the adhesive is cured in a state where it is attached to the outer surface of the bending part 115, the shape of the bent bending part 115 may be maintained more stably. The pressure-sensitive adhesive may be formed of a thermosetting resin or an ultraviolet curing resin.

Sixth, using the panel driver connector 320 mounted on the second flexible circuit board 300, as shown in FIG. 2D, the controller board 700 is connected. The control board 700 is equipped with a control board connector 710 connected to the panel driver connector 320.

The controller board 700 transmits image data, a timing synchronization signal, and the like to the driving integrated circuit 210. That is, the control panel 700 is a main board of an electronic product on which the flexible display apparatus according to the first embodiment of the present invention is mounted, and performs a function of generating image data and timing synchronization signals related to image output. To this end, various types of integrated circuits (ICs) and passive elements (resistors, capacitors, etc.), which are not shown, are disposed on the controller board 700. The driving integrated circuit 210 generates a data signal and a gate signal to be supplied to the display panel 100 using the image data and the timing synchronization signal transmitted from the control panel 700.

In the flexible display device according to the first exemplary embodiment as described above, the bezel width W may be reduced by bending the bending part 115 extending from one side of the first substrate 110.

On the other hand, in the flexible display device according to an embodiment of the present invention, the position where the driving integrated circuit 210, the driving elements, and the protective cap 310 are formed in the panel driver is formed in the bending structure and slimming of the display panel 100. It can be changed in various ways depending on the structure. This will be briefly described for each embodiment below.

3A to 3D illustrate various cross-sectional views of a flexible display device according to a second embodiment of the present invention. Hereinafter, contents identical or similar to those described in the flexible display apparatus according to the first exemplary embodiment of the present invention will be omitted or simply described.

First, FIG. 3A illustrates a form before the first substrate 110 is bent during the manufacturing process of the flexible display device according to the second embodiment of the present invention, and FIG. 3B illustrates a display panel in which the first substrate 110 is bent. The form bent to the back of (100) is shown. 3A and 3B, the flexible display apparatus according to the second exemplary embodiment of the present invention has a feature in that the panel driver includes only the first flexible circuit board 200.

A chip on film (COF) may be applied to the first flexible circuit board 200.

In addition to the driving integrated circuit 210, the first flexible circuit board 200 may include driving elements for supplying image data, timing synchronization signals, and the like input from the control board 700 to the driving integrated circuit 210 in a surface mount manner. The protection cap 310 for protecting the driving elements is formed.

That is, in the first embodiment of the present invention, only the driving integrated circuit 210 is mounted on the first flexible circuit board 200, and the driving elements protected by the protection cap 310 are mounted on the second flexible circuit board 300. Although mounted, the driving elements protected by the driving integrated circuit 210 and the protection cap 310 are mounted on the first flexible circuit board 200. In this case, a power IC for supplying power required for driving the driving integrated circuit 210 and the display panel 100 may be mounted on the controller board 700.

The cushion member 500 applied to the second embodiment of the present invention as described above, like the cushion member 500 applied to the first embodiment of the present invention, has a function of protecting only the driving integrated circuit 210. I'm doing it.

That is, as shown in FIG. 3B, although both the driving integrated circuit 210 and the protection cap 310 are adjacent to the bottom surface of the display panel 100, the protection cap 310 has a function of protecting the driving elements. Since it is performed by itself, the cushion member 500 for the protective cap 310 may not be provided.

In this case, the protective cap 310 may be attached to the bottom surface of the display panel 100 through a separate adhesive.

Next, referring to FIG. 3C, the controller board 700 may be connected to the first flexible circuit board 200 as shown in FIG. 3B. As described in the first embodiment of the present invention, the control board 700 and the first flexible circuit board 200 may be electrically connected through the panel driver connector and the control board connector. Can be connected.

The control panel 700 may also be attached to the bottom of the display panel 100 through adhesives of various types and forms.

Next, referring to FIG. 3D, the first flexible circuit board 200 may be connected to the control board 700 through the slit-shaped hole 720 formed in the control board 700. That is, the width of the control board 700 is wider than the width of the panel driver (first flexible circuit board 200), and the control board connector 710 for connecting the first flexible circuit board 200 and the control board 700. ) Is disposed on a surface opposite to the surface facing the first flexible circuit board 200 among the two surfaces of the control board 700, the first flexible circuit board 200 has a slit-shaped hole 720. Through) may be connected to the control board connector 710.

4A and 4B illustrate various cross-sectional views of a flexible display device according to a third embodiment of the present invention. Hereinafter, contents identical or similar to those described in the flexible display apparatus according to the first or second embodiment of the present invention will be omitted or simply described.

First, FIG. 4A illustrates a form in which the first substrate 110 is bent and bent to the rear surface of the display panel 100 during the manufacturing process of the flexible display device according to the third embodiment of the present invention. Referring to FIG. 4A, the third embodiment of the present invention has a feature in that the panel driver includes only the first flexible circuit board 200, similarly to the second embodiment of the present invention.

A chip on film (COF) may be applied to the first flexible circuit board 200.

In addition to the driving integrated circuit 210, the first flexible circuit board 200 may include driving elements for supplying image data, timing synchronization signals, and the like input from the control board 700 to the driving integrated circuit 210 in a surface mount manner. The protection cap 310 for protecting the driving elements is formed.

That is, in the first embodiment of the present invention, only the driving integrated circuit 210 is mounted on the first flexible circuit board 200, and the driving elements protected by the protection cap 310 are mounted on the second flexible circuit board 300. Although mounted, the driving elements protected by the driving integrated circuit 210 and the protective cap 310 are mounted on the first flexible circuit board 200. In this case, a power IC for supplying power required for driving the driving integrated circuit 210 and the display panel 100 may be mounted on the controller board 700.

The cushion member 500 applied to the third embodiment of the present invention as described above, unlike the cushion member 500 applied to the first and second embodiments of the present invention, the driving integrated circuit 210. And a protective cap 310 to protect both.

That is, in the third embodiment of the present invention, as shown in FIG. 4A, both the driving integrated circuit 210 and the protection cap 310 are adjacent to the bottom surface of the display panel 100, and the protection cap 310 is formed. ) And the driving integrated circuit 210 are in close contact with the cushion member 500 and protected.

In this case, two grooves may be formed in the cushion member 500 so that the protection cap 310 and the driving integrated circuit 210 may be inserted.

Next, referring to FIG. 4B, the control board 700 may be connected to the first flexible circuit board 200 as shown in FIG. 4A. In this case, various elements mounted on the control board 700 may be disposed to face the first flexible circuit board 200, and the first flexible circuit board 200 may be bent in the direction of the control board 700. In this state, it may be connected to the control board 700 through a connector or the like.

That is, the display panel 100, the protective cap 310 and the driving integrated circuit 210, the first flexible circuit board 200, the elements of the controller board and the controller board 700 are sequentially stacked, The flexible display device according to the third embodiment may be manufactured.

5A to 5D illustrate various cross-sectional views of the flexible display device according to the fourth embodiment. Hereinafter, the same or similar contents as those described in the flexible display apparatus according to the first to third embodiments of the present invention will be omitted or simply described.

First, FIG. 5A illustrates a form before the first substrate 110 is bent during the manufacturing process of the flexible display device according to the fourth embodiment of the present invention. FIG. 5B illustrates a display panel in which the first substrate 110 is bent. The form bent to the back of (100) is shown. 5A and 5B, the flexible display apparatus according to the fourth exemplary embodiment of the present invention has a feature in that the panel driver includes only the first flexible circuit board 200.

A chip on film (COF) may be applied to the first flexible circuit board 200.

Only the driving integrated circuit 210 is mounted on the first flexible circuit board 200. That is, in the second and third embodiments of the present invention, the driving integrated circuit 210 and the driving elements protected by the protection cap 310 are mounted on the first flexible circuit board 200. In the fourth embodiment of the present disclosure, only the driving integrated circuit 210 is mounted on the first flexible circuit board 200.

In this case, driving elements that perform a function of supplying image data, a timing synchronization signal, and the like, input from the control panel 700 to the driving integrated circuit 210, may be mounted on the control panel 700.

Therefore, the cushion member 500 applied to the fourth embodiment of the present invention as described above, like the cushion member 500 applied to the first and second embodiments of the present invention, the driving integrated circuit ( 210) to protect only the function.

That is, as shown in FIG. 5B, the driving integrated circuit 210 is disposed on the bottom of the display panel 100, and the cushion member 500 is disposed between the bottom of the display panel 100 and the driving integrated circuit 210. Is arranged.

The second surface of the cushion member 500 may be provided with a groove into which the driving integrated circuit 210 may be inserted, and the groove 510 formed on the second surface or the second surface of the cushion member 500. An adhesive may be attached or formed thereon. The driving integrated circuit 210 may be fixed to the cushion member 500 by an adhesive.

Next, referring to FIG. 5C, the first flexible circuit board 200 may be connected to the control board 700 through the slit-shaped hole 720 formed in the control board 700. That is, the width of the control board 700 is wider than the width of the panel driver (first flexible circuit board 200), and the control board connector 710 for connecting the first flexible circuit board 200 and the control board 700. ) Is disposed on a surface opposite to the surface facing the first flexible circuit board 200 among the two surfaces of the control board 700, the first flexible circuit board 200 has a slit-shaped hole 720. Through) may be connected to the control board connector 710.

Next, referring to FIG. 5D, the driving integrated circuit 210 of both surfaces of the first flexible circuit board 200 may be disposed on a first surface of the control panel 700 facing the display panel 100. The first surface on which) is mounted may be in contact with each other, such that the first flexible circuit board 200 and the control board 700 may be electrically connected to each other.

In this case, the protective cap covering the driving elements mounted on the first surface of the control panel is attached to the bottom of the display panel 100, so that the control panel 700 may be fixed to the display panel 100.

6A to 6D illustrate various cross-sectional views of a flexible display device according to a fifth embodiment of the present invention. Hereinafter, the same or similar contents as those described in the flexible display apparatus according to the first to fourth embodiments of the present invention will be omitted or simply described.

First, FIG. 6A illustrates a form before the first substrate 110 is bent during the manufacturing process of the flexible display device according to the fifth embodiment of the present invention. FIG. 6B illustrates a display panel in which the first substrate 110 is bent. The form bent to the back of (100) is shown. 6A and 6B, the flexible display device according to the fifth embodiment of the present invention has a feature that the driving integrated circuit 210 is mounted on the first substrate 110.

The flexible printed circuit (FPC) may be applied to the second flexible circuit board 300.

In the second flexible circuit board 300, driving elements for supplying image data, timing synchronization signals, and the like input from the control board 700 to the driving integrated circuit 210 are formed in a surface mount manner. A protective cap 310 for protection is formed.

In this case, the driving integrated circuit 210 for transmitting the data signal and the gate signal to the display panel 100 using the image data and the timing synchronization signal is mounted on the first substrate 110. The driving integrated circuit 210 may be covered and protected by the protective cover 250.

That is, in the fifth embodiment of the present invention, the driving elements protected by the protective cap 310 are mounted on the second flexible circuit board 300, and the driving integrated circuit 210 is protected by the protective cover 250. It is mounted on the first substrate 110 in a protected state.

The cushion member 500 applied to the fifth embodiment of the present invention as described above, unlike the cushion member 500 applied to the embodiments described above, the driving integrated circuit 210 or the protective cap 310 It does not function to support or protect it.

That is, as shown in FIG. 6B, the driving integrated circuit 210 is mounted on the upper surface of the display panel 100, and the protective cap 310 is also displayed on both sides of the second flexible circuit board 300. Since it is mounted on the first surface corresponding to the top surface of the 100, the driving integrated circuit 210 and the protective cap 310 do not directly contact the bottom surface of the display panel 100.

However, in the fifth embodiment of the present invention, in order to minimize friction or impact between the driving integrated circuit 210 and the display panel 100, as shown in FIG. 6B, the driving integration is performed on the bottom surface of the display panel 100. The cushion member 500 may be disposed at a portion where the circuit 210 is in close contact.

In this case, the second surface of the second flexible circuit board on which the protective cap 310 is not formed may be attached to and fixed to the bottom surface of the display panel 100 by an adhesive member.

Next, referring to FIG. 6C, the control board 700 may be connected to the second flexible circuit board 300 as shown in FIG. 6B. As described in the first embodiment of the present disclosure, the control board 700 and the second flexible circuit board 300 may be electrically connected through the panel driver connector and the control board connector, and various other types of bending methods may be used. Can be connected.

In this case, the first surface on which the driving elements are not formed on both surfaces of the control panel 700 may be attached to the bottom surface of the display panel 100 through adhesives of various types and shapes, and the second flexible circuit board The first surface on which the driving elements are mounted may be attached to the first surface of the control board 700.

Next, referring to FIG. 6D, the second flexible circuit board 300 as shown in FIG. 6B may be connected to the control board 700 through a slit-shaped hole 720 formed in the control board 700. Can be. That is, the width of the control board 700 is wider than the width of the panel driver (the second flexible circuit board 300), and the control board connector 710 for connecting the second flexible circuit board 300 and the control board 700. ) Is disposed on a surface opposite to the surface facing the second flexible circuit board 300 among the two surfaces of the control board 700, the second flexible circuit board 300 has a slit-shaped hole 720. Through) may be connected to the control board connector 710.

7 is an exemplary view illustrating a cross section of a flexible display device according to a sixth embodiment of the present invention. Hereinafter, the same or similar contents as those described in the flexible display apparatus according to the first to fifth embodiments of the present invention will be omitted or simply described.

In the flexible display device according to the sixth exemplary embodiment of the present invention, a curing agent formed of resin may be applied to an inner surface of both surfaces of the bending part 115 that is not exposed to the outside. Since the curing agent 800 is hardened in a state of being attached to the inner surface of the bending part 115, the shape of the bent bending part 115 may be maintained more stably.

The curing agent 800 may be formed by various methods.

For example, before bending the bending part 115, the curing agent 800 is applied to the inner side of the bending part, and then the bending part 115 is bent. Thereafter, the curing agent 800 may be cured using heat or ultraviolet rays.

In addition, after bending the bending part 115, the curing agent may be injected through the open surfaces that are open to both the left and right sides, and then the curing agent 800 may be cured using heat or ultraviolet rays.

The curing agent may be formed of a thermosetting resin, an ultraviolet curing resin, or the like.

Meanwhile, although FIG. 7 illustrates that the curing agent 800 is formed in the flexible display device according to the third exemplary embodiment of the present invention illustrated in FIG. 4A, the curing agent 800 is implemented in any of the embodiments described above. The same can be applied to the example.

That is, in the present invention, the cushion member 500 may be disposed between the driving integrated circuit 210 and the bottom of the display panel 100, and the adhesive 600 may be formed on the outer surface of the bending part 115. In addition, the curing agent 800 may be formed on the inner surface of the bending part 115.

In detail, in the present invention, at least one of the three components as described above, that is, the cushion member 500, the pressure-sensitive adhesive 600, and the curing agent 800 is formed.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical matters of the present invention. It will be evident to those who have knowledge of.

100 panel 200 first flexible circuit board
210: driving integrated circuit 300: second flexible circuit board
310: protective cap 500: cushion member
600: adhesive 800: cured material
700: control board

Claims (10)

A display panel including a plurality of pixels and having a first substrate formed of a flexible material and a second substrate facing and bonded to the first substrate;
A driving integrated circuit for converting the image data and the timing synchronizing signal transmitted from the control panel into data signals and gate signals and supplying the data signals to the display panel;
A cushion member disposed between the bottom surface of the display panel and the driving integrated circuit disposed in the bottom direction of the display panel as the bending part formed in the non-display area of the first substrate is bent; And
And a pressure-sensitive adhesive which is prevented from being unfolded by a restoring force and is cured after being applied to an outer surface of the bending part to maintain a bending state. The method of claim 1,
And a groove in which the driving integrated circuit can be inserted, is formed in the cushion member. The method of claim 1,
The driving integrated circuit,
A first flexible circuit board connected between the first substrate and a second flexible circuit board on which driving elements for transmitting the image data and the timing synchronization signal to the driving integrated circuit are mounted. 2. The flexible display apparatus of claim 2, wherein the flexible circuit board is connected to the control board. The method of claim 1,
The driving integrated circuit,
And a first flexible circuit board connected between the control panel and the first substrate. The method of claim 1,
The driving integrated circuit,
And a flexible display device mounted on the first substrate. delete The method of claim 1,
A flexible display device, wherein a curing agent is applied to an inner surface of both surfaces of the bending portion that is not exposed to the outside while the bending portion is bent, and the curing agent is cured after being applied to the inner surface. Manufacturing a display panel by mutually bonding a first substrate and a second substrate, the first substrate including a plurality of pixels and formed of a flexible material;
A driving integrated circuit for bending a bending part formed in the non-display area of the first substrate to convert the image data and the timing synchronization signal transmitted from the control panel into a data signal and a gate signal and supply the converted data signal to the display panel Disposing in the bottom direction of the display panel;
Contacting and fixing the driving integrated circuit to a cushion member disposed on a bottom surface of the display panel; And
And applying a pressure-sensitive adhesive on an outer surface of the bending part to prevent the bending part from being unfolded by a restoring force and to maintain a bending state, and then curing the pressure-sensitive adhesive. delete The method of claim 8,
And applying a curing agent to an inner surface of both sides of the bending portion that is not exposed to the outside while the bending portion is bent, and then curing the curing agent.

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