KR102454086B1 - Rollable flexible display device - Google Patents

Abstract

A roll-type flexible display device according to the present invention includes a display panel, a first connection member, a second connection member, and a panel roller unit. The display panel has a non-etched region and an etched region that is thinner than the non-etched region. The first connection member is bonded to the non-etched region to electrically connect the data printed circuit board (PCB) to the display panel. The second connecting member electrically connects the data PCB to the control PCB. The panel roller unit is bonded to the etch area. In this case, the front surface of the display panel is wound on the panel roller in the etched area.

Description

Rollable flexible display device {ROLLABLE FLEXIBLE DISPLAY DEVICE}

The present invention relates to a roll-type flexible display device.

As information technology develops, the market for display devices, which is a connection medium between users and information, is growing. Accordingly, the use of display devices such as an organic light emitting display (OLED), a liquid crystal display (LCD), and a plasma display panel (PDP) is increasing.

Among the display devices described above, the organic light emitting display includes a display panel including a plurality of sub-pixels and a driving unit for driving the display panel. The driver includes a scan driver that supplies a scan signal (or a gate signal) to the display panel, and a data driver that supplies a data signal to the display panel.

Since the organic light emitting display device can impart ductility, the display panel can be bent or curved, and the display panel can be deformed in shape, such as rolled up and unfolded. For this reason, in recent years, attempts have been made to design a display panel of an organic light emitting display device and a mechanical structure for accommodating the display panel in various forms.

The present invention provides a slim and lightweight roll-type flexible display device.

In order to achieve the above object, a roll-type flexible display device according to the present invention includes a display panel, a first connecting member, a second connecting member, and a panel roller unit. The display panel has an etched region and a non-etched region having different thicknesses. The first connection member is bonded to the non-etched region to electrically connect the data printed circuit board (PCB) to the display panel. The second connecting member electrically connects the data PCB to the control PCB. The panel roller unit is bonded to the etch area. The display panel is wound along the circumference of the panel roller part.

The roll-type flexible display device according to the present invention may further include a support member bonded to the rear surface of the display panel. The support member has a C-shape to support the data PCB and the control PCB. In this case, the data PCB and the control PCB may be wound around the support member to be folded in the rear direction of the display panel.

In the roll-type flexible display device according to the present invention, the display panel includes a first substrate having an etched region and a non-etched region, and a second substrate provided on a rear surface of the first substrate. In this case, the control PCB is embedded in the panel roller unit, and further includes a first adhesive member interposed between the data PCB and the second substrate.

On one plane, the length between the data PCB and the control PCB may be shorter than the length of the second connection member provided between the data PCB and the control PCB.

The roll-type flexible display device according to the present invention may further include a fixing part and a second adhesive member. The fixing part refers to a region in which a part of the second connecting member is fixed to the rear surface of the second substrate. The second adhesive member is interposed between the second member and the rear surface of the second substrate in the fixing part.

On one plane, a length between the data PCB and the fixing part may be shorter than a length of the second connecting member provided between the data PCB and the fixing part.

There are a plurality of fixing parts, and a length between adjacent fixing parts on one plane may be shorter than a length of a second connecting member disposed between adjacent fixing parts on a plane.

The roll-type flexible display device according to the present invention may further include an insulating member interposed between the first adhesive member and the second substrate.

The present invention provides a roll-type flexible display device in which a display panel is rolled up into a roll shape and is essential. The present invention can prevent interference of structures by further including a support member or an adhesive member. Accordingly, it is possible to prevent friction or damage between structures, thereby providing a roll-type flexible display device having improved product reliability and safety. In addition, the present invention can provide a slim and lightweight roll-type flexible display device.

1 is a schematic block diagram of an organic light emitting display device according to an embodiment of the present invention.
2 is a schematic circuit configuration diagram of a sub-pixel.
3 is an exemplary configuration diagram of a sub-pixel according to an embodiment of the present invention.
4 is a plan view of a display panel according to an exemplary embodiment of the present invention.
5 is a cross-sectional view of a display panel according to an exemplary embodiment of the present invention.
6 is a cross-sectional view illustrating an example of etching the first substrate.
7 is a cross-sectional view illustrating an example of bonding a first substrate and a second substrate.
8 is a plan view illustrating a modular display panel.
9 is a diagram illustrating a roll-type flexible display device according to an embodiment of the present invention.
10 is a perspective view illustrating a display panel and a panel roller unit;
11 is a diagram for explaining a first embodiment of the present invention, and is a view showing before and after rolling of a display panel separately.
12 is a diagram illustrating a second exemplary embodiment of the present invention, and is a view showing before and after rolling of a display panel separately.
13 is a diagram schematically illustrating the arrangement of structures provided in the roll-type flexible display device according to the second embodiment of the present invention.
14 and 15 are diagrams for explaining a roll-type flexible display device according to a third embodiment of the present invention.
16 is a view for explaining a roll-type soft display device according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numerals refer to substantially identical elements throughout. In the following description, if it is determined that a detailed description of a known technology or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, an example of implementing a roll-type flexible display device using an organic light emitting display device as an example will be described as an embodiment. However, the display panel capable of implementing the roll-type flexible display device is not limited thereto.

1 is a schematic block diagram of an organic light emitting display device according to an embodiment of the present invention, FIG. 2 is a schematic circuit diagram of a sub-pixel, and FIG. 3 is an exemplary configuration of a sub-pixel according to an embodiment of the present invention it is do

As shown in FIG. 1 , in the organic light emitting display device according to the embodiment of the present invention, an image processing unit 110 , a timing control unit 120 , a data driving unit 140 , a scan driving unit 130 , and a display panel 150 . This is included.

The image processing unit 110 outputs a data enable signal DE along with the data signal DATA supplied from the outside. The image processing unit 110 may output one or more of a vertical synchronization signal, a horizontal synchronization signal, and a clock signal in addition to the data enable signal DE, but these signals are omitted for convenience of description.

The timing controller 120 receives the data signal DATA from the image processing unit 110 as well as a driving signal including a data enable signal DE or a vertical synchronization signal, a horizontal synchronization signal, and a clock signal. The timing controller 120 includes a gate timing control signal GDC for controlling the operation timing of the scan driver 130 and a data timing control signal DDC for controlling the operation timing of the data driver 140 based on the driving signal. to output

The data driver 140 samples and latches the data signal DATA supplied from the timing controller 120 in response to the data timing control signal DDC supplied from the timing controller 120 , converts it into a gamma reference voltage, and outputs it. . The data driver 140 outputs the data signal DATA through the data lines DL1 to DLn. The data driver 140 may be formed in the form of an integrated circuit (IC).

The scan driver 130 outputs a scan signal while shifting the level of the gate voltage in response to the gate timing control signal GDC supplied from the timing controller 120 . The scan driver 130 outputs a scan signal through the scan lines GL1 to GLm. The scan driver 130 is formed in the form of an integrated circuit (IC) or is formed in the display panel 150 in the form of a gate in panel.

The display panel 150 displays an image in response to the data signal DATA and the scan signal supplied from the data driver 140 and the scan driver 130 . The display panel 150 includes sub-pixels SP that operate to display an image.

The sub-pixels are formed in a top-emission method, a bottom-emission method, or a dual-emission method according to a structure. The sub-pixels SP include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, or include a white sub-pixel, a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The sub-pixels SP may have one or more different emission areas according to emission characteristics.

As shown in FIG. 2 , one sub-pixel includes a switching transistor SW, a driving transistor DR, a capacitor Cst, a compensation circuit CC, and an organic light emitting diode (OLED).

The switching transistor SW performs a switching operation so that the data signal supplied through the first data line DL1 is stored as a data voltage in the capacitor Cst in response to the scan signal supplied through the first scan line GL1 . The driving transistor DR operates so that a driving current flows between the first power line EVDD and the second power line EVSS according to the data voltage stored in the capacitor Cst. The organic light emitting diode OLED operates to emit light according to a driving current formed by the driving transistor DR.

The compensation circuit CC is a circuit added in the sub-pixel to compensate for the threshold voltage of the driving transistor DR. The compensation circuit CC is composed of one or more transistors. The configuration of the compensation circuit CC is very diverse depending on the compensation method, and an example thereof will be described as follows.

As shown in FIG. 3 , the compensation circuit CC includes a sensing transistor ST and a sensing line VREF. The sensing transistor ST is connected between the source line of the driving transistor DR and the anode electrode of the organic light emitting diode OLED (hereinafter, referred to as a sensing node). The sensing transistor ST operates to supply an initialization voltage (or sensing voltage) transmitted through the sensing line VREF to the sensing node or to sense the voltage or current of the sensing node.

The switching transistor SW has a first electrode connected to the first data line DL1 and a second electrode connected to the gate electrode of the driving transistor DR. The driving transistor DR has a first electrode connected to the first power line EVDD and a second electrode connected to the anode electrode of the organic light emitting diode OLED. The capacitor Cst has a first electrode connected to the gate electrode of the driving transistor DR and a second electrode connected to the anode electrode of the organic light emitting diode OLED. In the organic light emitting diode OLED, an anode electrode is connected to a second electrode of the driving transistor DR and a cathode electrode is connected to a second power line EVSS. The sensing transistor ST has a first electrode connected to the sensing line VREF and a second electrode connected to the anode electrode of the organic light emitting diode OLED, which is a sensing node. For reference, the first electrode and the second electrode are defined as a source electrode and a drain electrode or a drain electrode and a source electrode depending on the type of the transistor.

The operating time of the sensing transistor ST may be similar/same as or different from that of the switching transistor SW according to a compensation algorithm (or a configuration of a compensation circuit). For example, the switching transistor SW may have a gate electrode connected to the 1a scan line GL1a, and the sensing transistor ST may have a gate electrode connected to the 1b scan line GL1b. As another example, the 1a scan line GL1a connected to the gate electrode of the switching transistor SW and the 1b scan line GL1b connected to the gate electrode of the sensing transistor ST may be connected in common.

The sensing line VREF may be connected to the data driver. In this case, the data driver senses the sensing node of the sub-pixel in real time, during the non-display period of the image, or during the period of N frames (N is an integer greater than or equal to 1), and performs compensation driving according to the sensing result. Meanwhile, the switching transistor SW and the sensing transistor ST may be turned on at the same time. In this case, the sensing operation through the sensing line VREF and the data output operation of outputting the data signal are separated (separated) from each other based on the time division method of the data driver.

In addition, a compensation target according to the sensing result may be a digital data signal, an analog data signal, or a gamma voltage. In addition, the compensation circuit for generating a compensation signal (or compensation voltage) based on the sensing result may be implemented as an inside of a data driver, an inside of a timing controller, or a separate circuit.

In addition, in FIG. 3, a sub-pixel having a 3T (Transistor) 1C (Capacitor) structure including a switching transistor (SW), a driving transistor (DR), a capacitor (Cst), an organic light emitting diode (OLED), and a sensing transistor (ST) is shown. Described as an example. However, when the compensation circuit CC is added, the sub-pixels may be formed of 3T2C, 4T2C, 5T1C, 6T2C, or the like.

Since the organic light emitting display device described above does not require a backlight unit, the thickness of the display panel can be made thinner than that of the liquid crystal display device. In addition, since the organic light emitting display device is thin enough to provide ductility, the display panel can be bent or curved, and the display panel can be deformed in shape such as rolled up and unfolded. For this reason, in recent years, attempts have been made to design a display panel of an organic light emitting display device and a mechanical structure for accommodating the display panel in various forms.

Hereinafter, a structure of a display panel that can be rolled up and opened in a roll shape in order to realize a roll-type flexible display device will be described.

4 is a plan view of a display panel according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of a display panel according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view showing an example of etching the first substrate; 7 is a cross-sectional view illustrating an example of bonding a first substrate and a second substrate, and FIG. 8 is a plan view illustrating a modular display panel.

4 to 8 , in the display panel 150 according to the exemplary embodiment of the present invention, an intermediate layer IL having a display area AA including a first substrate GLS and a plurality of pixels P and a second substrate MS.

The intermediate layer IL includes an adhesive layer ADL together with a plurality of pixels P constituting the display area AA. The plurality of pixels P may include sub-pixels emitting red (R), white (W), blue (B), and green (G) light, but is not limited thereto. The adhesive layer ADL promotes adhesion between the first substrate GLS and the second substrate MS and seals the intermediate layer IL positioned between the first substrate GLS and the second substrate MS. is done

The first substrate GLS is made of glass or resin. The thickness of the first substrate GLS may be selected to be 0.01 mm to 0.2 mm. As a result of the experiment, it was found that if the thickness of the first substrate (GLS) is as thin as 0.01 mm to 0.1 mm, it is very easy to deform into a form that can be rolled up and opened even if it is made of glass rather than resin.

The first substrate GLS includes an etched region (etched portion) GLS1 and a non-etched region (non-etched portion) GLS2 . The non-etched region GLS2 is formed in a region where a pad portion for connection to an external substrate is formed. The non-etched region GLS2 has a rectangular shape having a long horizontal direction. The non-etched region GLS2 is provided to increase the rigidity of the region connected to the external substrate. Therefore, it is preferable that the non-etched region GLS2 occupies only 1% to 2% of the total area of the first substrate GLS. In addition, since it is necessary to maintain high rigidity compared to the etched region GLS1 , the thickness t2 of the non-etched region GLS2 is preferably selected to be 0.5 mm to 0.7 mm.

Except for the non-etched region GLS2 , all of the remaining regions are removed by an etching (etching) process and the like to become the etched region GLS1 . The etched region GLS1 is provided to reduce the occurrence of tensile stress that may be applied to the first substrate GLS when the display panel 150 is rolled up and then opened. Therefore, the thickness t1 of the etch region GLS1 is preferably selected to be 0.01 mm to 0.1 mm.

The second substrate MS is made of metal. The thickness of the second substrate MS may be selected from 0.01 mm to 0.2 mm. The second substrate MS serves to absorb, disperse, and relieve tensile stress that the first substrate GLS may receive when the display panel 150 is rolled up and opened in a roll shape. As a result of the experiment, if the thickness of the second substrate MS is as thin as 0.01 mm to 0.2 mm, the tensile stress that the first substrate GLS may receive when the display panel 150 is rolled up and then opened was found to be able to efficiently absorb, disperse and alleviate

Since the second substrate MS is made of a metal material, it has strong resistance to impact compared to the first substrate GLS. Therefore, the second substrate MS may be manufactured to be larger than the first substrate GLS. That is, the second substrate MS may have a protruding area GP that protrudes outwardly compared to the first substrate GLS, and one or more of these may be provided. In addition, the protruding region GP of the second substrate MS can effectively protect a weak portion such as an edge impact that the first substrate GLS may receive.

On the other hand, the display panel 150 is electrically connected to and connected to the timing controller 120 , the data driver 140 , the scan driver 130 , etc. (an image processing unit or a power supply unit are not shown), so as to be modularized as shown in FIG. 8 . do.

The scan driver 130 may be formed on the display panel 150 in a GIP method. That is, it may be preferable to form the scan driver 130 on the left, right, or all of the left and right sides of the display area AA in a gate in panel (GIP) manner to form the display panel 150 in a scroll shape. However, the present invention is not limited thereto.

The data printed circuit board (hereinafter, referred to as “PCB”) 135 is electrically connected to the display panel 150 through the first connecting member 145 . The first connection member 145 may be a chip on film (COF) on which the data driver 140 is mounted, but is not limited thereto. For example, the first connection member 145 may be implemented in a tape carrier package (TCP) method to electrically connect the data PCB 135 and the display panel 150 .

The data PCB 135 is connected to the control PCB 125 through the second connection member 127 . There may be a plurality of second connecting members 127 . A timing controller 120 and the like are mounted on the control PCB 125 . The second connection member 127 may be a flexible flat cable (FFC), but is not limited thereto. The control PCB 125 may be connected to the image processing unit 110 , a power supply unit, and the like through a connection cable 129 ( FIG. 11 ).

Hereinafter, the structure of the mechanism structure for realizing the roll-type flexible display device will be described.

9 is a view of a roll-type flexible display device according to an embodiment of the present invention, and FIG. 10 is a perspective view illustrating a display panel and a panel roller unit.

9 and 10 , in the roll-type flexible display device according to the embodiment of the present invention, a modular display panel 150 (hereinafter abbreviated as display panel), a panel roller unit 160 and a receiving unit ( 170) is included.

The panel roller unit 160 has a circular shape. The panel roller unit 160 provides a mechanism structure in which the display panel 150 can be rolled up on its outer circumferential surface in a circular shape or the like. The panel roller unit 160 is accommodated in the receiving unit 170 .

The accommodating unit 170 accommodates the display panel 150 and the panel roller unit 160 . A driving device for electrically rotating the panel roller unit 160, for example, a motor, a gear, and a power source, may be included in the receiving unit 170 . Therefore, the accommodating part 170 may be designed in a circular shape, an oval shape, a square shape, a rectangle shape, or a polygon shape according to the configuration or design of the driving device.

The display panel 150 comes out of the accommodating part 170 or goes into the accommodating part 170 according to the rotation direction of the driving device. For example, when the driving device rotates in the r1 direction, the panel roller unit 160 unwinds the display panel 150 . In this case, since the display panel 150 moves in the y2 direction, it comes out of the accommodating part 170 . Conversely, when the driving device rotates in the r2 direction, the panel roller unit 160 rolls the display panel 150 . In this case, since the display panel 150 moves in the y1 direction, it enters the accommodating part 170 .

Hereinafter, the features of the present invention will be described in detail through preferred embodiments of the present invention.

<First embodiment>

Hereinafter, a roll-type flexible display device according to a first embodiment of the present invention will be described with reference to FIG. 11 . 11 is a diagram illustrating a first exemplary embodiment of the present invention, and is a view showing before and after rolling of the display panel 150 separately.

The roll-type flexible display device according to the first embodiment of the present invention includes a panel roller unit 160 , a display panel 150 , a data PCB 135 , a control PCB 125 , and a support member 143 .

The panel roller unit 160 has a substantially circular shape. An operation of rolling or unrolling the display panel 150 along the circumference of the panel roller unit 160 may be repeatedly performed. In the etching region GLS1 , the front surface of the display panel 150 is wound around the panel roller unit 160 . The front surface of the display panel 150 may be a display surface on which an input image is implemented.

One end of the display panel 150 is fixed to the panel roller unit 160 . In order to fix one end of the display panel 150 to the panel roller unit 160 , an adhesive member or a fixing member may be provided between one end of the display panel 150 and the panel roller unit 160 .

A non-etched region GLS2 is positioned at the other end of the display panel 150 that is not directly fixed to the panel roller 160 . Compared to the etched region GLS1 , the non-etched region GLS2 has a more protruding shape to the outside. Accordingly, when the display panel 150 is rolled or stretched along the circumference of the panel roller unit 160 , between the non-etched region GLS2 and the panel roller unit 160 or between the non-etched region GLS2 and the etched region ( Mechanical problems such as friction or collision between GLS1) may occur. To prevent this, the non-etched region GLS2 is located on the opposite side of the panel roller unit 160 , rather than at the part where it starts to roll.

An auxiliary sheet 200 may be further attached to the rear surface of the display panel 150 . The auxiliary sheet 200 serves to relieve mechanical stress that may occur in some areas when the display panel 150 is rolled up in a roll shape.

The data PCB 135 is electrically connected to the display panel 150 through the first connection member 145 . The first connection member 145 is bonded to the rear surface of the non-etched region GLS2 . The control PCB 125 is electrically connected to the data PCB 135 through the second connection member 127 . Assuming that the surface of the display panel 150 on which the input image is implemented is the front surface of the display panel 150 , the data PCB 135 and the control PCB 125 are located in the rear direction of the display panel 150 . do. The control PCB 125 may be electrically connected to the image processing unit 110 , a power supply unit, and the like through a connection cable 129 .

The support member 143 is bonded to the rear surface of the display panel 150 . That is, the display panel 150 includes a first substrate GLS and a second substrate MS disposed on a rear surface of the first substrate GLS, and the support member 143 is a rear surface of the second substrate MS. can be joined to

The connection members 127 and 145 may receive excessive stress due to the weight of the data PCB 135 and the control PCB 125 and the weight of the connection cable 129 connected to the control PCB 125 . Accordingly, defects such as separation of the connecting members 127 and 145 and structures connected thereto, or damage to the connecting members 127 and 145 may occur. In addition, since the data PCB 135 and the control PCB 125 are connected by the connecting members 127 and 145 having a soft property, they are not fixed and can be moved. Accordingly, friction or collision with other structures may occur between the data PCB 135 and the control PCB 125 .

In order to prevent such a problem, the roll-type flexible display device according to the first embodiment of the present invention further includes a support member 143 . The support member 143 is bonded to the rear surface of the display panel 150 to support the data PCB 135 and the control PCB 125 electrically connected to the display panel 150 . The data PCB 135 and the control PCB 125 may be wound around the support member 143 to be folded in a rear direction of the display panel 150 . By the support member 143 , the movement of the data PCB 135 and the control PCB 125 may be constrained or restricted. If necessary, the data PCB 135 and/or the control PCB 125 may be bonded to the support member 143 .

The support member 143 may have a shape bent at least twice in the same direction. In this case, the bending points are spaced apart from each other by a predetermined distance. For example, the support member 143 may have an approximately 'C' shape or a 'C' shape. The support member 143 is formed of a material having a predetermined rigidity so as to maintain the molded shape and support the structures. For example, the support member 143 may be formed of a material such as stainless steel (SUS) or plastic.

The roll-type flexible display device according to the first embodiment of the present invention includes the support member 143 to minimize interference between structures including the display panel 150 , the data PCB 135 , and the control PCB 125 . can Accordingly, the first embodiment of the present invention can provide a roll-type flexible display device having improved product reliability and stability.

However, in the first embodiment of the present invention, a region in which rolling is impossible due to structures such as the support member 143 , the data PCB 135 , and the control PCB 125 (hereinafter referred to as a 'rolling impossible region') ) (LNA1) occurs. That is, the display panel 150 can be rolled or unfolded, but structures such as the support member 143 , the data PCB 135 , and the control PCB 125 cannot be rolled or unfolded. Efforts to reduce the non-rollable area may deteriorate the aesthetics of the roll-type flexible display device and reduce ease of use and usability.

<Second embodiment>

Hereinafter, a roll-type flexible display device according to a second embodiment of the present invention will be described with reference to FIGS. 12 to 13 . 12 is a diagram illustrating a second exemplary embodiment of the present invention, and is a view showing before and after rolling of a display panel separately. 13 is a diagram schematically illustrating the arrangement of structures provided in the roll-type flexible display device according to the second embodiment of the present invention.

12 and 13 , the roll-type flexible display device according to the second embodiment of the present invention includes a panel roller unit 160 , a display panel 150 , a data PCB 135 , a control PCB 125 , and a first 1 The adhesive member 180 and the like are included.

The panel roller unit 160 has a substantially circular shape. An operation of rolling or unrolling the display panel 150 along the circumference of the panel roller unit 160 may be repeatedly performed. One end of the display panel 150 is fixed to the panel roller unit 160 . In order to fix one end of the display panel 150 to the panel roller unit 160 , an adhesive member or a fixing member may be provided between one end of the display panel 150 and the panel roller unit 160 .

A non-etched region GLS2 is positioned at the other end of the display panel 150 that is not directly fixed to the panel roller 160 . Compared to the etched region GLS1 , the non-etched region GLS2 has a more protruding shape to the outside. Accordingly, when the display panel 150 is rolled or stretched along the circumference of the panel roller unit 160 , between the non-etched region GLS2 and the panel roller unit 160 or between the non-etched region GLS2 and the etched region ( Mechanical problems such as friction or collision between GLS1) may occur. To prevent this, the non-etched region GLS2 is located on the opposite side of the panel roller unit 160 , rather than at the part where it starts to roll.

The data PCB 135 is electrically connected to the display panel 150 through the first connection member 145 . The first connection member 145 is bonded to the rear surface of the non-etched region GLS2 . The control PCB 125 is electrically connected to the data PCB 135 through the second connection member 127 .

The control PCB 125 is embedded in the panel roller unit 160 . Accordingly, the length of the second connection member 127 connecting the data PCB 135 and the control PCB 125 is relatively longer than that of the first embodiment. The second connecting member 127 extends from the data PCB 135 and is connected to the control PCB 125 through an inlet provided at one side of the panel roller unit 160 . When the rolling operation of the display panel 150 is performed, the second connecting member 127 is rolled together in association with the rolling operation.

In the second embodiment of the present invention, unlike the first embodiment, since the control PCB 125 is built into the panel roller unit 160 , the control PCB 125 and a connection cable connected to the control PCB 125 ( The provision of the support member 143 capable of supporting the weight of 129 (FIG. 11) is not required.

However, in the second embodiment of the present invention, the stress acting on the first connection member 145 due to the weight of the data PCB 135 is reduced, and friction and collision between the data PCB 135 and other structures are reduced. To prevent this, the first adhesive member 180 is further provided between the rear surface of the display panel 150 and the data PCB 135 . That is, the display panel 150 includes a first substrate GLS and a second substrate MS disposed on the rear surface of the first substrate GLS, and the first adhesive member 180 is the second substrate MS. ) is interposed between the rear surface of the data PCB 135 and the data PCB 135 . The second adhesive member 182 may be a double-sided tape. The movement of the data PCB 135 may be constrained or restricted by the first adhesive member 180 .

Unlike the first embodiment, the second embodiment of the present invention does not include the support member 143 having a predetermined thickness t1 ( FIG. 11 ) and weight. That is, in the second embodiment of the present invention, it is sufficient if only the first adhesive member 180 having a light and thin thickness t2 is provided. Accordingly, the second embodiment can achieve a slimmer and lighter product compared to the first embodiment, thereby further improving the aesthetics of the product as well as the usability of the product.

In addition, the second embodiment of the present invention can significantly reduce the non-rollable area LNA2 compared to the first embodiment. That is, in the first embodiment, the non-rolling area LNA1 ( FIG. 11 ) in which structures such as the support member 143 , the data PCB 135 , and the control PCB 125 that cannot be rolled or unfolded can be located is sufficiently allocated. should be In contrast, in the second embodiment, it is sufficient to secure the non-rollable area LNA2 in which only the data PCB 135 structure that cannot be rolled or unfolded can be located. According to the second embodiment of the present invention, it is possible to provide a roll-type flexible display device having improved usability and usability, as well as aesthetics, by minimizing the non-rollable area.

<Third embodiment>

Hereinafter, a roll-type flexible display device according to a third embodiment of the present invention will be described with reference to FIGS. 14 and 15 . 14 and 15 are diagrams for explaining a roll-type flexible display device according to a third embodiment of the present invention. In the description of the third embodiment of the present invention, contents substantially the same as those of the second embodiment will be omitted.

In the roll-type flexible display device, the display panel 150 may repeatedly perform rolling or unfolding operations along the circumference of the panel roller unit 160 . The second connecting member 127 positioned in the rear direction of the display panel 150 also performs the rolling operation in association with the rolling operation in which the display panel 150 is rolled or unfolded. When the rolling operation is performed, length changes of the display panel 150 and the second connecting member 127 are different. Accordingly, when the length of the display panel 150 and the length of the second connection member 127 are the same at positions corresponding to each other, tensile stress or the like may act on the second connection member 127 , and a stress greater than or equal to the breaking strength may be applied to the second connection member 127 . Cracks may occur if applied.

In order to prevent such defects, the roll-type flexible display device according to the third embodiment of the present invention is characterized in that the length of the second connection member 127 is relatively sufficiently secured compared to the length of the display panel 150 . When the length of the second connecting member 127 is sufficiently secured, a difference in length change occurring when the display panel 150 and the second connecting member 127 perform a rolling operation along the circumference of the panel roller unit 160 . can be compensated for

Referring to FIG. 14 , assuming that the data PCB 135 and the control PCB 125 are on one plane, the length L1 between the data PCB 135 and the control PCB 125 is, ) and the second connection member 127 disposed between the control PCB 125 is shorter than the length. In this case, even when the display panel 150 maintains a flat state, the second connection member 127 may not maintain a flat state.

Specifically, the second connection member 127 is wound around the panel roller unit 160 together with the display panel 150 . When the maximum length wound around the panel roller unit 160 of the display panel 150 is 100%, the maximum length wound around the panel roller unit 160 in the second connecting member 127 is between 105% and 120%. It is preferable to be

However, when the second connecting member 127 has a sufficient length compared to the display panel 150 , the second connecting member 127 may droop in a direction in which gravity acts. In this case, the second connecting member 127 may come into contact with another structure, causing friction and damage.

To prevent this, in the third embodiment of the present invention, a portion of the second connection member 127 may be fixed to a portion of the rear surface of the second substrate MS. Hereinafter, a region in which a part of the second connection member 127 is fixed to the rear surface of the second substrate MS is defined as a fixing part 181 .

Referring further to FIG. 15 , the fixing part 181 is provided with a second adhesive member 182 to fix a portion of the second connection member 127 to the rear surface of the second substrate MS. The second adhesive member 182 may be a double-sided tape. The double-sided tape is interposed between the second connecting member 127 and the rear surface of the second substrate MS to bond them together.

Assuming that the data PCB 135 and the control PCB 125 are on one plane, the length L2 between the data PCB 135 and the fixing part 181 is the data PCB 135 and the fixing part 181 . ) is shorter than the length of the second connecting member 127 disposed between. In this case, even when the display panel 150 maintains a flat state, the second connection member 127 disposed between the data PCB 135 and the fixing part 181 maintains a flat state. may not keep The length of the display panel 150 between the data PCB 135 and the fixing part 181 is shorter than the length of the second connection member 127 between the data PCB 135 and the fixing part 181 .

In addition, assuming that the data PCB 135 and the control PCB 125 are on one plane, the length L3 between the fixing part 181 and the control PCB 125 is, the fixing part 181 and the control PCB 125 . It is shorter than the length of the second connecting member 127 disposed between 125 . In this case, even when the display panel 150 maintains a flat state, the second connection member 127 disposed between the fixing part 181 and the control PCB 125 maintains a flat state. may not keep

The fixing part 181 may be plural. Assuming that the data PCB 135 and the control PCB 125 are on one plane, the length L4 between the adjacent fixing parts 181 is the second connection between the adjacent fixing parts 181 . shorter than the length of the member 127 . In this case, even when the display panel 150 maintains a flat state, the second connection member 127 disposed between the adjacent fixing parts 181 may not maintain a flat state. have. The length of the display panel 150 between the adjacent fixing parts 181 is shorter than the length of the second connecting member 127 between the adjacent fixing parts 181 .

The roll-type flexible display device according to the third exemplary embodiment of the present invention includes the second connecting member 127 having a sufficient length, thereby compensating for a length deviation from the display panel 150 when performing a rolling operation. In addition, according to the third exemplary embodiment of the present invention, a portion of the second connecting member 127 is fixed to the rear surface of the display panel 150 through the second adhesive member 182 , thereby reducing the sagging of the second connecting member 127 . Interference with other structures can be prevented.

<Fourth embodiment>

Hereinafter, a roll-type flexible display device according to a fourth embodiment of the present invention will be described with reference to FIG. 16 . 16 is a view for explaining a roll-type soft display device according to a fourth embodiment of the present invention. In the description of the fourth embodiment of the present invention, contents substantially the same as those of the second embodiment will be omitted.

Referring to FIG. 16 , the roll-type flexible display device according to the fourth embodiment of the present invention further includes an insulating member 190 . The insulating member 190 may be an adhesive including any one of polyvinyl chloride (PVC) and polythyelene terepthalate (PET). However, the present invention is not limited thereto. The insulating member 190 is interposed between the first adhesive member 180 and the rear surface of the second substrate MS. When a double-sided tape or the like is used as the first adhesive member 180 , the first adhesive member 180 may perform a predetermined insulating function to prevent electrical interference between the display panel 150 and the data PCB 135 . can However, when it is difficult to perform a sufficient insulating function depending on the material selected as the first adhesive member 180 , the insulating member 190 including an insulating material may be further included. According to the fourth embodiment of the present invention, it is possible to provide a roll-type flexible display device having reduced driving defects by minimizing signal interference between the data PCB 135 and the display panel 150 .

Those skilled in the art through the above description will be able to make various changes and modifications without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

120: timing controller 125: control PCB
140: data driver 135: data PCB
150: display panel GLS: first substrate
MS: second substrate GLS1: etch region
GLS2: non-etched region 145: first connecting member
127: second connection member 170: support member
180: first adhesive member 181: fixing part
182: second adhesive member 190: insulating member

Claims (16)

A display panel comprising: a display panel having a non-etched region and an etched region having a thickness smaller than that of the non-etched region;
a first connection member bonded to the non-etched region to electrically connect a data printed circuit board (PCB) to the display panel;
a second connection member electrically connecting the data PCB to the control PCB;
a panel roller unit joined to the etching area;
a support member bonded to a rear surface of the display panel;
In the etching area, the front surface of the display panel is wound on the panel roller part,
The support member has a shape bent at least twice in the same direction to support the data PCB and the control PCB. delete The method of claim 1,
The data PCB and the control PCB,
A roll-type flexible display device wound around the support member and folded in a rear direction of the display panel. A display panel comprising: a display panel having a non-etched region and an etched region having a thickness smaller than that of the non-etched region;
a panel roller unit joined to the etching area;
a data printed circuit board (PCB) provided in the non-etched region and electrically connected to the display panel through a first connection member;
a control PCB embedded in the panel roller and electrically connected to the data PCB through a second connecting member;
a first adhesive member disposed between the data PCB and the display panel to attach the data PCB to the display panel;
A roll-type flexible display device in which a front surface of the display panel is wound around the panel roller in the etched area. 5. The method of claim 4,
The second connecting member,
It is wound on the panel roller part together with the display panel,
When the maximum length wound around the panel roller in the display panel is 100%, the maximum length wound around the panel roller in the second connecting member is between 105% and 120%. 6. The method of claim 5,
a fixing part to which a portion of the second connection member is fixed to a rear surface of the display panel; and
and a second adhesive member interposed between the second connecting member and a rear surface of the display panel in the fixing part. 7. The method of claim 6,
A length of the display panel between the data PCB and the fixing part is
A roll-type flexible display device having a length shorter than a length of a second connecting member between the data PCB and the fixing part. 8. The method of claim 7,
The fixing part is a plurality,
A length of the display panel between the adjacent fixing parts is
A roll-type flexible display device having a length shorter than a length of the second connecting member between the adjacent fixing parts. 5. The method of claim 4,
The roll-type flexible display device further comprising an insulating member interposed between the first adhesive member and the display panel. The roll-type flexible display device of claim 6 , wherein the display panel includes a first substrate and a second substrate disposed on a rear surface of the first substrate. The roll-type flexible display device of claim 10 , wherein the fixing part and the second adhesive member are disposed between the second connecting member and a rear surface of the second substrate. The roll-type flexible display device of claim 10 , wherein the insulating member is disposed between the first adhesive member and the second substrate. display panel;
a data printed circuit board (PCB) bonded to one side of the display panel and electrically connected to the display panel through a first connection member;
a panel roller unit bonded to the other side of the display panel; and
and a control PCB embedded in the panel roller unit and electrically connected to the data PCB through a second connection member. The roll-type flexible display device of claim 13 , wherein the first connection member, the data PCB, and the second connection member are disposed on a rear surface of the display panel, and a front surface of the display panel is wound around the panel roller unit. 15. The method of claim 14,
and a first adhesive member disposed between a rear surface of the display panel and the data PCB. 14. The method of claim 13,
A length between the data PCB and the control PCB is shorter than a length of the second connecting member.

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