Organic light-emitting display panel and organic light-emitting display device

Abstract

An organic light-emitting display panel comprising: a flexible substrate (110) including a first non-bending region (NA1), a second non-bending region (NA2), and a bending region (BA) between the first non-bending region (NA1) and the second non-bending region (NA2); a plurality of organic light-emitting elements (170) arranged in the first non-bending region (NA1), the second non-bending region (NA2), and the bending region (BA), each of the plurality of organic light-emitting elements (170) including an anode (142), an organic emission layer (150), and a cathode (160);anda plurality of pixel drive circuits (PD) each electrically connected to the plurality of organic light-emitting elements (170),wherein the plurality of pixel drive circuits (PD) are arranged only in the first non-bending region (NA1) and the second non-bending region (NA2) on the flexible substrate (110), and the plurality of organic light-emitting elements (170) arranged in the bending region (BA) are each connected to a pixel drive (PD) arranged in the first non-bending region (NA1) or in the second non-bending region (NA2);

Description

BackgroundTechnical area

[0001] The present disclosure relates to an organic light emitting display panel and an organic light emitting display device including an organic light emitting display panel and an organic light emitting display device that can reduce or minimize deterioration of the characteristics of the driving elements during repeated bending. Description of the state of the art

[0002] An organic light-emitting display device is a display device that emits light itself and does not require a separate light source, unlike a liquid crystal display (LCD). Thus, the organic light-emitting display device can be manufactured in a lightweight and thin form. Furthermore, the organic light-emitting display device is advantageous in terms of power consumption because it is driven by a low voltage. Furthermore, the organic light-emitting display device has excellent color display capability, high response speed, a wide color viewing angle, and a high contrast ratio. Therefore, the organic light-emitting display device has been researched as a next-generation display device.

[0003] In recent years, flexible display devices that can display an image even when bent like paper by incorporating a conductive line on a substrate made of a flexible material such as plastic have received attention as next-generation display devices. Flexible display devices have been widely used in a variety of applications, ranging from computer monitors and television sets (TVs) to personal portable equipment. There has also been interest in developing flexible display devices that have a large display area and a smaller volume and weight. In particular, there has been increasing interest in organic light-emitting display devices as more suitable for a flexible display device because, unlike liquid crystal displays, such devices do not require a backlight unit.

[0004] US 2014 / 0 361 262 A1 discloses a flexible display comprising a flexible substrate having two non-bending regions and a bending region located between the non-bending regions. A cable layer is arranged on the flexible substrate. The pixels and thin-film transistors are arranged in the cable layer.

[0005] An organic light-emitting display device as a flexible display device may be configured to be bent or folded in only one direction and only in a specific region. If the organic light-emitting display device is implemented as a bendable or foldable display device as described above, the specific region may be repeatedly bent, thereby damaging or deteriorating the drive elements arranged in the corresponding region. Summary

[0006] An exemplary object of the present disclosure is to provide an organic light emitting display panel and an organic light emitting display device in which a pixel driving circuit for driving an organic light emitting element is not arranged in a bending region subjected to repeated bending, thereby reducing or minimizing damage to a pixel driving circuit caused by stress generated during repeated bending.

[0007] Another exemplary object of the present disclosure is to provide an organic light emitting display panel and an organic light emitting display device in which a pixel driving circuit and a gate driving circuit are arranged in a non-bending region and thereby improve reliability.

[0008] The objects of the present disclosure are not limited to the exemplary objects mentioned above, and other objects not mentioned above will become apparent to one of ordinary skill in the art from the following description.

[0009] In an exemplary embodiment, the present disclosure provides an organic light-emitting display panel comprising: a flexible substrate including a first non-bending region, a second non-bending region, and a bending region between the first non-bending region and the second non-bending region; a plurality of organic light-emitting elements arranged in the first non-bending region, the second non-bending region, and the bending region, the plurality of organic light-emitting elements including an anode, an organic emission layer, and a cathode; and a plurality of pixel driving circuits in the first non-bending region and the second non-bending region, the plurality of pixel driving circuits being electrically connected to the plurality of organic light-emitting elements.

[0010] In another exemplary embodiment, a flexible substrate includes an active region and a bezel region surrounding the active region, wherein the active region includes the plurality of organic light-emitting elements and the plurality of pixel drive circuits.

[0011] In another exemplary embodiment, each of the plurality of pixel drive circuits includes a switching thin film transistor, a capacitor, and a drive thin film transistor electrically connected to the organic light-emitting element.

[0012] In another exemplary embodiment, the organic light emitting display panel further comprises: a gate drive circuit in the bezel region, the gate drive circuit including a thin film transistor and a capacitor.

[0013] In another exemplary embodiment, the thin film transistor and the capacitor of the gate drive circuit are arranged in the first non-bending region and the second non-bending region overlapping with the active region.

[0014] In another exemplary embodiment, the organic light emitting display panel further comprises: a plurality of gate lines connecting the gate drive circuit and the plurality of pixel drive circuits, the plurality of gate lines being arranged in the first non-bending region and the second non-bending region.

[0015] In another exemplary embodiment, the number of organic light-emitting elements in the first non-bending region and the second non-bending region is smaller than the number of pixel drive circuits in the first non-bending region and the second non-bending region.

[0016] In another exemplary embodiment, the number of pixel drive circuits per unit region in the first non-bending region and the number of pixel drive circuits per unit region in the second non-bending region decrease as a distance from the bending region increases.

[0017] In another exemplary embodiment, the organic light-emitting display panel further comprises: a connecting line connecting the anode of the organic light-emitting element in the bending region and the pixel driving circuit in the first non-bending region or the second non-bending region, wherein the connecting line comprises a material that is the same as the material of one of a source electrode, a drain electrode, and a gate electrode arranged on the pixel driving circuit.

[0018] In another exemplary embodiment, the connecting line is an extension of the source electrode or the drain electrode.

[0019] In another exemplary embodiment, one or more lines and one or more insulating layers are arranged between the flexible substrate and the organic light-emitting elements in the bending region.

[0020] In another exemplary embodiment, the anode includes a reflective layer comprising a metal material and a transparent conductive layer comprising a transparent conductive material, wherein the transparent conductive layer is on the reflective layer.

[0021] Another exemplary embodiment of the present disclosure provides an organic light-emitting display device comprising: a housing including a first housing, a second housing, and a flexure connecting the first housing and the second housing; and an organic light-emitting display panel surrounded by the housing and including a plurality of organic light-emitting elements and a plurality of pixel driving circuits electrically connected to the plurality of organic light-emitting elements, wherein the plurality of pixel driving circuits are arranged in a part of the organic light-emitting display panel surrounded by the first housing and the second housing.

[0022] In another exemplary embodiment, the organic light emitting display device further comprises: a gate drive circuit including a thin film transistor and a capacitor, wherein the thin film transistor and the capacitor are arranged in the part of the organic light emitting display panel surrounded by the first housing and the second housing.

[0023] In another exemplary embodiment, the bending element bends the organic light emitting display device in one direction.

[0024] Details of other exemplary embodiments of the present disclosure are included in the following detailed description and the accompanying drawings.

[0025] According to the present disclosure, a pixel driving circuit and a gate driving circuit are arranged in a non-bending region, thereby suppressing deterioration of the characteristics of an interface between laminated layers or cracks of a metal layer or an insulating layer caused by repeated bending.

[0026] Furthermore, according to the present disclosure, it is possible to minimize a change in threshold voltage (Vth) or mobility of a thin film transistor when a stress is applied to the thin film transistor when an organic light emitting display device is bent.

[0027] The effects of the present disclosure are not limited to the above-mentioned effects, and various other effects and their equivalents are included in the present disclosure. Brief description of the drawings

[0028] The foregoing and other aspects, features and advantages of the present disclosure will be better understood from the following detailed description taken in conjunction with the accompanying drawings in which: Fig. 1 is a plan view of an organic light emitting display panel according to an exemplary embodiment of the present disclosure; Fig. 2 an enlarged plan view of an area X of the Fig. 1; Fig. 3 a cross-sectional view along a line III-III' of the Fig. 2; Fig. 4 is a plan view of an organic light emitting display panel according to another exemplary embodiment of the present disclosure; Fig. 5 is an enlarged plan view of an area Y of the Fig. 4 shown organic light emitting display panel; and Fig. 6 and Fig. 7 are perspective views of an organic light emitting display device according to an exemplary embodiment of the present disclosure. Detailed description of the embodiment

[0029] Advantages and features of the present disclosure and methods for achieving them will be better understood from the exemplary embodiments described below with reference to the accompanying drawings. However, the present disclosure is not limited to the following exemplary embodiments and may be implemented in various other forms. The exemplary embodiments are provided only to complete the disclosure of the present disclosure and to provide a person of ordinary skill in the art to which the present disclosure is intended with a grasp of the invention, and the present disclosure is defined by the appended claims and combinations thereof.

[0030] Shapes, sizes, ratios, angles, numbers, and the like shown in the accompanying drawings are merely exemplary, and the present disclosure is not limited thereto. Like reference numerals generally designate like elements throughout this specification. Furthermore, in the following description, detailed explanation of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Terms such as "including," "comprising," and "consisting of" used herein are generally intended to allow other components to be included, unless the terms are used in conjunction with the term "only." All references to the singular may include the plural unless expressly stated otherwise.

[0031] Components are interpreted to contain a common error range, even if this is not explicitly stated.

[0032] When the positional relationship between two parts is described using terms such as "on", "above", "below", and "nearest", one or more parts may be positioned between the two parts, provided the terms are not used together with the term "immediate" or "direct".

[0033] When an element or layer is described as being "on" another element or layer, the element or layer may be directly on top of the other element or layer, or there may be intervening elements or layers.

[0034] Although the terms "first," "second," and the like are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from the other components, and a first component may be a second component in a technical concept of the present disclosure.

[0035] The size and thickness of each component shown in the drawings are represented for convenience of explanation, and the drawings are not necessarily to scale.

[0036] The features of various embodiments of the present disclosure may be partially or completely bonded or combined with each other and may be firmly joined together and operated in various technical ways, and embodiments may be practiced independently of each other or in conjunction with each other.

[0037] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0038] Fig. 1 is a plan view of an organic light-emitting display panel according to an exemplary embodiment of the present disclosure. As shown in Fig. 1, an organic light emitting display panel 100 includes a flexible substrate 110 and a plurality of pixels PX.

[0039] The flexible substrate 110 supports various elements of the organic light-emitting display panel 100 and may be formed from a flexible insulating material. For example, the flexible substrate 110 may be formed from a transparent plastic material such as polyimide (PI) and polyethylene terephthalate (PET), but is not limited thereto.

[0040] The flexible substrate 110 includes a first non-bending region NA1, a second non-bending region NA2, and a bending region BA between the first non-bending region NA1 and the second non-bending region NA2.

[0041] The organic light-emitting display panel 100 may be configured to be bendable in the bending region BA. That is, the first non-bending region NA1 and the second non-bending region NA2 of the flexible substrate 110 are maintained in a flat state without being bent, and only the bending region BA of the flexible substrate 110 can be bent. The organic light-emitting display panel 100 may be bent such that the first non-bending region NA1 and the second non-bending region NA2 of the flexible substrate 110 can face each other.

[0042] The flexible substrate 110 further includes an active region AA and a border region ZA surrounding the active region AA. The active region AA is a region in which an image is displayed on the organic light-emitting display panel 100. As shown in Fig. As shown in Figure 2, a plurality of organic light-emitting elements 170 and a plurality of pixel drive circuits PD, each electrically connected to the plurality of organic light-emitting elements 170, are arranged in the active region AA for driving the plurality of organic light-emitting elements 170. The border region ZA is a region in which no image is displayed on the organic light-emitting display panel 100, and various wirings or drive circuits other than the pixel drive circuits are formed thereon. Although in Fig. 1, the bezel region ZA may include a bezel region ZA pad region on which an external module is disposed. The bezel region ZA pad region is a region where no image is displayed and a plurality of pad electrodes are formed. In the present disclosure, the pad region is a region where the pad electrodes are bonded to external modules, such as an FPCB (flexible printed circuit board), a TCP (tape carrier package), or a COF (chip on film).

[0043] As in Fig. As shown in Figure 1, the plurality of pixels PX are arranged in the active region AA of the organic light-emitting display panel 100, but are not arranged in the bezel region ZA. Furthermore, the plurality of pixels PX are arranged in an area overlapping with the active region AA of the first non-bending region NA1, the second non-bending region NA2, and the bending region BA. That is, the plurality of pixels are arranged at a central portion of the organic light-emitting display panel 100.

[0044] Each of the plurality of pixels PX is a region that can independently display a specific color. For example, the plurality of pixels PX may include a red pixel configured to emit red light, a green pixel configured to emit green light, a blue pixel configured to emit blue light, and a white pixel configured to emit white light, but the present disclosure is not limited thereto. The plurality of pixels PX may also include a pixel configured to emit light of a different color.

[0045] One of the plurality of organic light-emitting elements is arranged in each of the plurality of pixels PX, and the plurality of organic light-emitting elements are respectively electrically connected to the plurality of pixel driving circuits. Thus, each of the plurality of pixels PX can be defined to include an organic light-emitting element and a pixel driving circuit. Hereinafter, the organic light-emitting elements 170 and the pixel driving circuits PD of the respective pixels PX arranged in the bending region BA and the non-bending regions NA1 and NA2 will be described in detail with reference to FIG. Fig. 2 and Fig. 3 described.

[0046] Fig. 2 is an enlarged plan view of an area X of the Fig. 1 shown organic light emitting display panel, and Fig. 3 is a cross-sectional view along a line III-III' of the Fig. 2 shown organic light emitting display panel. Fig. 2 illustrates only a first pixel PX1 and a second pixel PX2 arranged in the first non-bending region NA1, and a third pixel PX3 and a fourth pixel PX4 arranged in the bending region BA, among the plurality of pixels PX for simplification of explanation. The region X is a region for eight pixels PX arranged adjacent to a boundary between the first non-bending region NA1 and the bending region BA in the active region AA.

[0047] As in Fig. 2, a plurality of lines are arranged on the flexible substrate 110. The plurality of lines includes the gate lines GL2, GL3, and GL4 extending in a first direction, for example, the X-axis direction, and the data lines DL and Vdd lines VL extending in a second direction, for example, the Y-axis direction, on the flexible substrate 110. The gate lines GL2, GL3, and GL4 are configured to apply a gate signal to the pixel drive circuits PD, the data lines DL are configured to apply a data signal to the pixel drive circuits PD, and the Vdd lines VL are configured to apply a Vdd voltage to the pixel drive circuits PD. Fig. 2 illustrates only the gate lines GL2, GL3, and GL4, the data lines DL, and the Vdd lines Vdd for convenience of explanation. However, the present disclosure is not limited thereto, and additional lines may be arranged on the flexible substrate 110 depending on the type and number of a thin-film transistor 120 and a capacitor constituting the pixel drive circuit PD and a driving method of the organic light-emitting element 170.

[0048] As in Fig. 2, the data lines DL and the Vdd lines extend in the Y-axis direction. Therefore, the data lines DL and the Vdd lines VL are arranged in both the first non-bending region NA1 and the bending region BA. Furthermore, although in Fig. 2, the data lines DL and the Vdd lines VL also extend from the first non-bending region NA1 through the bending region BA into the second non-bending region NA2. On the other hand, the gate lines GL2, GL3, and GL4, which extend in the X-axis direction, are arranged only in the first non-bending region NA1 and are not arranged in the bending region BA. Furthermore, although in Fig. 2, a plurality of gate lines are also arranged in the second non-bending region NA2. The positions of the gate lines GL2, GL3, and GL4 will be described in detail with reference to the pixel drive circuits PD.

[0049] As in the Fig. 2 and Fig. 3, the plurality of pixel drive circuits PD are electrically connected to the plurality of organic light-emitting elements 170 arranged in the plurality of pixels PX, and the plurality of pixel drive circuits PD are arranged on the flexible substrate 110. The plurality of pixel drive circuits PD are arranged only in the first non-bending region NA1 and the second non-bending region NA2 on the flexible substrate 110. The plurality of pixel drive circuits PD include various drive elements for driving the organic light-emitting elements 170 and are electrically connected to the organic light-emitting elements 170. The plurality of pixel drive circuits PD are arranged in the active region AA among the enclosure region ZA and the active region AA. Although Fig. 3 includes only one driving thin film transistor among various driving elements of the pixel driving circuits PD for the convenience of explanation, the present disclosure is not limited thereto, and the pixel driving circuits PD may include at least a switching thin film transistor, a driving thin film transistor, and a capacitor.

[0050] As in Fig. As shown in Figure 3, the thin-film transistor 120 serving as a driving thin-film transistor is disposed on the flexible substrate 110. Specifically, a buffer layer 111 is formed on the flexible substrate 110, and an active layer 121 of the thin-film transistor 120 is formed on the buffer layer 111. The buffer layer 111 is an insulating layer configured to protect the thin-film transistor 120 from the infiltration of moisture or oxygen from the flexible substrate 110. The buffer layer 111 may be formed of silicon oxide SiOx or silicon nitride SiNx. The buffer layer 111 may be omitted depending on the structure or characteristics of the organic light-emitting display panel 100. The active layer 121 is a semiconductor layer in which a channel region of the thin-film transistor 120 is formed. The active layer 121 may be formed, for example, from polysilicon, amorphous silicon or an oxide semiconductor.A gate electrode 122 is formed on the active layer 121, and a gate insulating layer 112 configured to insulate the active layer 121 and the gate electrode 122 is formed between the active layer 121 and the gate electrode 122. The gate insulating layer 112 may be formed of silicon oxide or silicon nitride, and the gate electrode 122 may be formed of a conductive material such as a metal material. An interlayer insulating layer 113 is formed on the gate electrode 122, and a source electrode 123 and a drain electrode 124 are formed on the interlayer insulating layer 113. The interlayer insulation layer 113 is configured to insulate the gate electrode 122 from the source electrode 123 and the drain electrode 124, and may be formed of silicon oxide or silicon nitride.The source electrode 123 and the drain electrode 124 are electrically connected to the active layer 121 via contact holes formed in the gate insulating layer 112 and the interlayer insulating layer 113. Furthermore, the source electrode 123 and the drain electrode 124 may be formed of, for example, a metal material. Although the structure shown in FIG. Fig. 3 has a coplanar structure, the present disclosure is not limited thereto, and the thin film transistor 120 may have a staggered structure.

[0051] A cap layer 114 is disposed on the thin-film transistor 120. The cap layer 114 functions to flatten an upper portion of the flexible substrate 110. The cap layer 114 may be configured as a single layer or multiple layers and may be formed from an organic material, such as a polyimide or an acrylic resin, but the present disclosure is not limited thereto.

[0052] As in Fig. 2, the plurality of organic light-emitting elements 170 are respectively arranged on the plurality of pixels PX. Thus, the plurality of organic light-emitting elements 170 are arranged on the first non-bending region NA1, the second non-bending region NA2, and the bending region BA. For example, among the plurality of pixels PX, a first organic light-emitting element 171 is arranged on a first pixel PX1, a second organic light-emitting element 172 is arranged on a second pixel PX2, a third organic light-emitting element 173 is arranged on a third pixel PX3, and a fourth organic light-emitting element 174 is arranged on a fourth pixel PX4. Each of the organic light-emitting elements 171, 172, 173, and 174 includes an anode, an organic emission layer 150 on the anode, and a cathode 160 on the organic emission layer 150.

[0053] From the plurality of organic light-emitting elements 170, the second organic light-emitting element 172 arranged in the first non-bending region NA1 and the third organic light-emitting element 173 arranged in the bending region BA are identified with reference to Fig. 3 in more detail. The second organic light-emitting element 172 includes a second anode 142 on the cap layer 114, the organic emission layer 150 on the second anode 142, and the cathode 160 on the organic emission layer 150. Similarly, the third organic light-emitting element 173 includes a third anode 143 on the cap layer 114, the organic emission layer 150 on the third anode 143, and the cathode 160 on the organic emission layer 150. Although in Fig. 3, the first organic light-emitting element 171 and the fourth organic light-emitting element 174 may also be configured in the same manner as the second organic light-emitting element 172 and the third organic light-emitting element 173.

[0054] As in Fig. As shown in Figure 3, the second anode 142 and the third anode 143 are arranged on the cap layer 114 and are configured to supply holes for the organic emission layer 150. The second anode 142 and the third anode 143 are electrically connected to the driving thin-film transistors 120 of the second pixel driving circuit PD2 and the third pixel driving circuit PD3. The second anode 142 and the third anode 143 are arranged to be separated from each other on the cap layer 114 and may be formed of a transparent conductive material, for example, indium tin oxide (ITO) or indium zinc oxide (IZO).

[0055] The wall 115 is formed on the second anode 142, the third anode 143, and the cap layer 114. The wall 115 separates adjacent pixels PX. The wall 115 may be formed from an organic insulating material such as a polyimide, an acrylic, or a benzocyclobutene-based resin, but the present disclosure is not limited thereto.

[0056] The organic emission layer 150 is arranged on the second anode 142, the third anode 143, and the wall 115. The organic emission layer 150 is an organic layer configured to emit light having a specific color and may contain a light-emitting material capable of emitting, for example, red, green, blue, or white light. The organic emission layer 150 of Fig. 3 is a continuous layer disposed on the second anode 142 and the third anode 143. However, the organic emission layer 150 is not limited thereto and may be patterned on each pixel PX. Furthermore, although in Fig. 3 is omitted, a color filter may also be included if the organic emission layer 150 emits white light, and thereby white light emitted from the organic emission layer 150 is converted into one of red, green, and blue light. Furthermore, although the organic emission layer 150 is the only one in Fig. 3, the display panel may include other organic layers such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer disposed between the second and third anodes 142 and 143 and the cathode 160.

[0057] The cathode 160 is disposed on the organic emission layer 150 and supplies electrons to the organic emission layer 150. Thus, the cathode 160 is formed from a conductive material having a low work function, such as a material such as magnesium (Mg) and a silver-magnesium alloy (Ag:Mg alloy).

[0058] The plurality of pixel drive circuits PD are arranged only in the first non-bending region NA1 and the second non-bending region NA2, and not in the bending region BA. In other words, the plurality of pixel drive circuits PD are arranged in an area overlapping with the active area AA of the first non-bending region NA1 and the second non-bending region NA2.

[0059] As in the Fig. 1 and Fig. 2, among the plurality of organic light-emitting elements 170 arranged in the bending region BA, a pixel drive circuit PD electrically connected to the organic light-emitting element 170 adjacent to the first non-bending region NA1 rather than the second non-bending region NA2 is arranged in the first non-bending region NA1. Furthermore, although in Fig. 2, of the plurality of organic light-emitting elements 170 arranged in the bending region BA, a pixel drive circuit PD electrically connected to the organic light-emitting element 1 adjacent to the second non-bending region NA2 rather than the first non-bending region NA1 is arranged in the second non-bending region NA2. For example, if the number n of organic light-emitting elements 170 is arranged in the bending region BA, the pixel drive circuits PD electrically connected to the number n / 2 of organic light-emitting elements 170 adjacent to the first non-bending region NA1 may be arranged in the first non-bending region NA1, and the pixel drive circuits PD electrically connected to the number n / 2 of organic light-emitting elements 170 adjacent to the second non-bending region NA2 may be arranged in the second non-bending region NA2. For example, as shown in Fig. 2, if the third pixel PX3 and the fourth pixel PX4 arranged in the bending region BA are adjacent to the first non-bending region NA1 rather than the second non-bending region NA2, the third pixel driving circuit PD3 electrically connected to the third organic light-emitting element 173 of the third pixel PX3 and the fourth pixel driving circuit PD4 electrically connected to the fourth organic light-emitting element 174 of the fourth pixel PX4 are arranged in the first non-bending region NA1.

[0060] The gate lines GL2, GL3, and GL4 electrically connected to the pixel driving circuits PD may also be arranged only in the first non-bending region NA1 and the second non-bending region NA2, because all the pixel driving circuits PD are formed in the first non-bending region NA1 and the second non-bending region NA2. For example, a third gate line GL3 electrically connected to the third pixel driving circuit PD3 for driving the third organic light-emitting element 173 arranged in the bending region BA, and a fourth gate line PD4 electrically connected to the fourth pixel driving circuit PD4 for driving the fourth organic light-emitting element 174 arranged in the bending region BA may be arranged in the first non-bending region NA1.

[0061] The organic light-emitting elements 170 arranged in the bending region BA may be electrically connected to the pixel drive circuits PD arranged in the first non-bending region NA1 or the second non-bending region NA2 via the connecting lines 130. For example, as shown in the Fig. 2 and Fig. 3, the third anode 143 of the third organic light-emitting element 173 disposed in the bending region BA is electrically connected to the third pixel driving circuit PD3 disposed in the first non-bending region NA1 via a third interconnection line 133 extending in the Y-axis direction. Further, an anode of the fourth organic light-emitting element 174 disposed in the bending region BA may be electrically connected to the fourth pixel driving circuit PD4 disposed in the first non-bending region NA1 via a fourth interconnection line 134 extending in the Y-axis direction.

[0062] The connecting line 130 may be formed of the same material as the source electrode 123 and the drain electrode 124 arranged in the pixel drive circuit PD. For example, as shown in Fig. 3, the third interconnection line 133 may extend from the drain electrode 124 of the thin-film transistor 120 among the interconnection lines 130 and be formed at the same time as the source electrode 123 and the drain electrode 124. Although not illustrated, a first interconnection line 131, a second interconnection line 132, and the fourth interconnection line 134 may also be formed as one body with the drain electrode 124 of the thin-film transistor 120, but the present disclosure is not limited thereto. The interconnection lines 130 may be formed as one body with the source electrode 123 of the thin-film transistor 120 and may be formed of the same material as the gate electrode 122 of the thin-film transistor 120.Furthermore, the interconnection line 120 may include a layer formed of the same material as the gate electrode 122 and another layer formed of the same material as the source electrode 123 and the drain electrode 124.

[0063] The organic light-emitting elements 170 arranged in the bending region BA are electrically connected to the pixel drive circuits PD arranged in the first non-bending region NA1 or the second non-bending region NA2 via the connecting lines 130. Thus, only one or more lines and one or more insulation layers may be arranged between the flexible substrate 110 and the organic light-emitting elements 170 in the bending region BA. As shown in the Fig. 2 and Fig. As shown in Figure 3, the third pixel drive circuit PD3 and the fourth pixel drive circuit PD4, which are electrically connected to the third organic light-emitting element 173 and the fourth organic light-emitting element 174, respectively, arranged in the bending region BA, are arranged in the first non-bending region NA1. Thus, only the data lines DL, the Vdd lines VL, and the connection lines 130 are arranged in the bending region BA, as shown in Figure 3. Fig. 2. Therefore, no conductive materials other than the various lines may be formed between the flexible substrate 110 and the organic light-emitting elements 170 in the bending region BA. Furthermore, the insulating layers such as the buffer layer 111, the gate insulating layer 112, the interlayer insulating layer 113, and the cap layer 114 are generally formed on the entire surface of the flexible substrate 110. Therefore, the above-described insulating layers may be disposed between the flexible substrate 110 and the organic light-emitting elements 170 in the bending region BA.Therefore, a structure between the flexible substrate 110 and the organic light-emitting elements 171 and 172 on the first pixel PX1 and the second pixel PX2 arranged in the first non-bending region NA1 may be different from a structure between the flexible substrate 110 and the organic light-emitting elements 173 and 174 on the third pixel PX3 and the fourth pixel PX4 arranged in the bending region BA. Similarly, a structure between the flexible substrate 110 and the organic light-emitting elements 170 on the pixels PX arranged in the second non-bending region NA2 may be different from a structure between the flexible substrate 110 and the organic light-emitting elements 170 on the pixels PX arranged in the bending region BA.

[0064] As described above, the pixel drive circuit PD electrically connected to the organic light-emitting element 170 disposed in the bending region BA is disposed in the first non-bending region NA1 or the second non-bending region NA2. Thus, the number of organic light-emitting elements 170 disposed in the first non-bending region NA1 and the second non-bending region NA2 is smaller than the number of pixel drive circuits PD disposed in the first non-bending region NA1 and the second non-bending region NA2. For example, the number m of organic light-emitting elements 170 may be disposed in each of the first non-bending region NA1 and the second non-bending region NA2, and the number n of organic light-emitting elements 170 may be disposed in the bending region BA.In such a case, the number of pixel driving circuits PD arranged in each of the first non-bending region NA1 and the second non-bending region NA2 may be m + (n / 2).

[0065] Furthermore, a plurality of pixel drive circuits PD may be arranged on a pixel PX in the first non-bending region NA1 and the second non-bending region NA2. That is, an organic light-emitting element 170 may overlap with a plurality of pixel drive circuits PD in the first non-bending region NA1 and the second non-bending region NA2. As shown in Fig. As shown in FIG. 2, the third pixel drive circuit PD3 and the fourth pixel drive circuit PD4 for driving the third organic light-emitting element 173 and the fourth organic light-emitting element 174, respectively, arranged in the bending region BA may be arranged on the second pixel PX2 in the first non-bending region NA1. However, the number of pixel drive circuits PD arranged on one pixel PX in the first non-bending region NA1 and the non-bending region NA2 is not limited thereto and may be determined based on the size of the pixel PX and the size of the pixel drive circuits PD. For example, if the sum of the sizes of a specific number of pixel drive circuits PD is less than or equal to the size of one pixel PX, at most the specific number of pixel drive circuits PD may be arranged on the one pixel PX.

[0066] The pixel drive circuit PD, which is electrically connected to the organic light-emitting element 170 arranged in the bending region BA, is arranged in the first non-bending region NA1 or the second non-bending region NA2. Thus, the pixel drive circuits PD for driving the organic light-emitting elements 170 may be arranged in a pixel different from a pixel for the organic light-emitting element 170. For example, as shown in Fig. 2, the third pixel drive circuit PD3 and the fourth pixel drive circuit PD4 for driving the third organic light-emitting element 173 and the fourth organic light-emitting element 174, respectively, arranged in the bending region BA may be arranged on the second pixel PX2 arranged in the first non-bending region NA1, and the second pixel PX2 may not have sufficient space for an additional pixel drive circuit PD. In such a case, the second pixel drive circuit PD2 for driving the second organic light-emitting element 172 on the second pixel PX2 may be arranged on the first pixel PX1 on an upper side relative to the second pixel PX2.The second anode 142 of the second organic light-emitting element 172 may be electrically connected to the second pixel driving circuit PD2 via the second connection line 132, and the first organic light-emitting element 171 on the first pixel PX1 may also be electrically connected to the first pixel driving circuit arranged on an upper pixel PX relative to the first pixel PX1 via the first connection line 131.

[0067] As in Fig. 2, among the organic light-emitting display devices 170 arranged in the bending region BA, an organic light-emitting element 170 that is further away from a boundary between the bending region BA and the first non-bending region NA1 is electrically connected to a pixel drive circuit PD that is closer to the boundary between the bending region BA and the first non-bending region NA1. For example, as shown in Fig. 2, the fourth organic light-emitting element 174 may be farther away from the boundary between the bending region BA and the first non-bending region NA1 than the third organic light-emitting element 173. In this case, the fourth pixel driving circuit PD4 electrically connected to the fourth organic light-emitting element 174 may be closer to the boundary between the bending region BA and the first non-bending region NA1 than the third pixel driving circuit PD3 electrically connected to the third organic light-emitting element 173.Similarly, among the organic light-emitting display devices 170 arranged in the bending region BA, an organic light-emitting element 170 that is farther away from a boundary between the bending region BA and the second non-bending region NA2 may be electrically connected to a pixel driving circuit PD that is closer to the boundary between the bending region BA and the second non-bending region NA2.

[0068] Of the pixel drive circuits PD arranged in the first non-bending region NA1, more pixel drive circuits PD may be arranged in a region adjacent to the bending region BA. That is, the number of pixel drive circuits PD per unit region in the first non-bending region NA1 may decrease as the distance from the bending region BA increases. For example, if it is assumed that a pixel PX is a unit region and the third pixel drive circuit PD3 and the fourth pixel drive circuit PD4 are arranged on the second pixel PX2, then only the second pixel drive circuit PD2 may be arranged on the first pixel PX1 farther away from the bending region BA than the second pixel PX2, as shown in Fig. 2 is shown.

[0069] The pixel drive circuit PD arranged in the second non-bending region NA1 is electrically connected to the organic light-emitting element 170 arranged in the bending region BA via the connecting line 130. In such a case, as the length of the connecting line 130 increases, the resistance value of the connecting line 130 may also increase. Thus, it is desirable to set the length of the connecting line 130 to be as short as possible and to arrange the pixel drive circuit PD in the first non-bending region NA1 as close as possible to the bending region BA. As a result, the number of pixel drive circuits PD per unit region in the first non-bending region NA1 may decrease as a distance from the bending region BA increases. Although in Fig. 2, the number of pixel driving circuits PD per unit area in the second non-bending area NA2 may also decrease as the distance from the bending area BA increases.

[0070] In the organic light-emitting display panel 100 in which the bending region BA can be bent in a specific direction, elements arranged in the bending region BA are repeatedly subjected to stress if the bending region BA is repeatedly bent. The stress generated when the bending region BA is bent by vertically moving at least one of the first non-bending region NA1 and the second non-bending region NA2 of the organic light-emitting display panel 100 may cause various problems. For example, if the bending region BA is repeatedly bent while the thin-film transistor 120 is arranged in the bending region BA, the source electrode 123 and the drain electrode 124 connected to the active layer 121 in which a channel region is formed via the contact hole may be easily broken.Furthermore, the electrical contact between the active layer and the source and drain electrodes 123 and 124 may fail, or the properties of the interfaces between an electrode of the thin-film transistor 120, an electrode of the capacitor, a wiring W, and the insulating layers laminated in the bending region BA may deteriorate. As a result, a change in the threshold voltage or mobility of the thin-film transistor 120 may occur due to such problems, thereby deteriorating the electrical properties of the thin-film transistor 120 and the properties of the organic light-emitting element 170 electrically connected to the thin-film transistor 120.

[0071] Thus, in the organic light-emitting display panel 100, the pixel driving circuits PD such as the thin-film transistor 120 and the capacitor for driving the organic light-emitting elements 170 are arranged only in the first non-bending region NA1 and the second non-bending region NA2 of the active region, and not in the bending region BA. Thus, a driving element such as the thin-film transistor 120 is not arranged between the flexible substrate 110 and the organic light-emitting elements 170 in the bending region BA, but only wiring and insulation layers are arranged therein. Thus, where stress is applied to the bending region BA, damage to various elements such as the resistors can occur.the thin film transistors 120 and the capacitors included in the pixel drive circuits PD and present in the non-bending region NA1 and the non-bending region NA2 can be minimized, thereby improving the reliability of the organic light-emitting display panel 100.

[0072] In the organic light-emitting display panel 100, a pixel drive circuit PD electrically connected to an organic light-emitting element 170 of the pixel PX closer to the first non-bending region NA1 among the plurality of organic light-emitting elements 170 arranged in the bending region BA is arranged in the first non-bending region NA1. Further, a pixel drive circuit PD electrically connected to an organic light-emitting element 170 of a pixel PX closer to the second non-bending region NA2 among the plurality of organic light-emitting elements 170 arranged in the bending region BA is arranged in the second non-bending region NA2.Therefore, a concentration of the pixel drive circuits PD electrically connected to an organic light-emitting element 170 arranged in the bending region BA in a specific region of the first non-bending region NA1 or the second non-bending region NA2 can be reduced, and it can be easier to construct and arrange the pixel drive circuits PD in the first non-bending region NA1 and the second non-bending region NA2.

[0073] The organic light-emitting display panel 100 according to an exemplary embodiment of the present disclosure may be implemented as a top-emission organic light-emitting display panel in which light is emitted from the organic emission layer 150 to a top surface through the cathode 160. As described above, a pixel driving circuit PD, which is conventionally arranged in the bending region BA, is shifted to the first non-bending region NA1 and the second non-bending region NA2, and pixel driving circuits PD in a higher number than pixels PX are arranged in the first non-bending region NA1 and the second non-bending region NA2.Therefore, if the organic light-emitting display panel 100 is implemented as a bottom-emission organic light-emitting display panel in which light is emitted from the organic emission layer 150 through the flexible substrate 110 on which the pixel driving circuits PD are arranged, an aperture of the emission region can be reduced. Thus, the organic light-emitting display panel 100 can be implemented as a top-emission organic light-emitting display panel, and sufficient space for the pixel driving circuits PD can be ensured in the first non-bending region NA1 and the second non-bending region NA2.

[0074] If the organic light-emitting display panel 100 is an organic light-emitting display panel with upward emission, an anode of the organic light-emitting element 170 may further include a reflective layer. For example, as shown in Fig. 3, the second anode 142 and the third anode 143 further include reflective layers so that light emitted from the organic emission layer 150 can be reflected by the second anode 142 and the third anode 143 and easily emitted toward an upper surface. The second anode 142 and the third anode 143 may have a two-layer structure in which a transparent conductive layer made of a transparent conductive material and a reflective layer are sequentially laminated. Alternatively, the second anode 142 and the third anode 143 may have a three-layer structure in which a transparent conductive layer, a reflective layer, and a transparent conductive layer are sequentially laminated. However, the present disclosure is not limited to this. The reflective layer may be formed of silver (Ag) or an alloy containing silver.For example, the reflective layer may be formed of silver or APC (Ag / Pd / Cu). Furthermore, if the organic light-emitting display panel 100 is a top-emission organic light-emitting display panel, the cathode 160 may be formed of the same material as the above-described material of the second anode 142 and the third anode 143 and may have a small thickness. Alternatively, the cathode 160 may be formed of a transparent conductive oxide such as indium tin oxide and indium zinc oxide.

[0075] Although, as in Fig. 1, the flexible substrate 110 has only the two non-bending regions NA1 and NA2 and the one bending region BA between the non-bending regions NA1 and NA2, the number of non-bending regions and the number of bending regions of the flexible substrate 110 is not limited thereto. There may be two non-bending regions NA1 and NA2, as shown in Fig. 1, or there may be three non-bending regions and two bending regions BA between the non-bending regions, or there may be four or more non-bending regions, and the like.

[0076] Furthermore, although the bending region BA of the flexible substrate 110 is as shown in Fig. 1 extends in a direction parallel to the X-axis direction, the direction in which the bending region BA extends is not limited to this, and the bending region BA may extend in various directions.

[0077] Fig. 4 is a plan view of an organic light emitting display panel according to another exemplary embodiment of the present disclosure, and Fig. Figure 5 is an enlarged plan view of the area Y of the Fig. 4. The organic light-emitting display panel 400 shown in the Fig. 4 and Fig. 5 is substantially similar to the organic light emitting display panel 100 shown in the Fig. 1 to 3, except that the gate drive circuits GD are further included. Thus, redundant explanations thereof are omitted.

[0078] As in Fig. As shown in Figure 4, the gate drive circuits GD are arranged in the enclosure region ZA of the flexible substrate 110. The gate drive circuits GD are configured to apply a gate signal to each of the pixel drive circuits PD via the gate lines GL. The gate drive circuits GD may be referred to as GIP (Gate-in-Panel) circuits because the gate drive circuits GD are formed directly on the flexible substrate 110. As shown in Fig. As shown in Figure 4, the gate drive circuits GD are each arranged in the enclosure region ZA on both sides of the active region AA. However, the present disclosure is not limited thereto, and the gate drive circuits GD may be arranged in the enclosure region ZA on only one side of the active region AA.

[0079] As in Fig. 5, the gate drive circuits GD may include a fourth gate drive circuit GD4 configured to apply a gate signal to the fourth pixel drive circuit PD4, a third gate drive circuit GD3 configured to apply a gate signal to the third pixel drive circuit PD3, and a second gate drive circuit GD2 configured to apply a gate signal to the second pixel drive circuit PD2. Although in Fig. 5, a first gate drive circuit GD1 configured to apply a gate signal to the first pixel drive circuit PD1 may be further included. Each of the second gate drive circuit GD2, the third gate drive circuit GD3, and the fourth gate drive circuit GD4 may include various elements such as a thin-film transistor and a capacitor. Furthermore, wirings W for transmitting various signals within the gate drive circuit GD may be arranged therein.

[0080] The gate drive circuits GD are arranged only in the first non-bending region NA1 and the second non-bending region NA2 of the enclosure region ZA and are not arranged in the bending region BA. For example, as shown in Fig. As shown in Figure 5, the second gate drive circuit GD2, the third gate drive circuit GD3, and the fourth gate drive circuit GD4 are all arranged in the first non-bending region NA1. Furthermore, all thin-film transistors and capacitors of the respective gate drive circuits GD are arranged in the first non-bending region NA1. Although in Fig. 5, the gate drive circuits GD may also be arranged in the second non-bending region NA2 in the same way as those in the first non-bending region NA1. The lines W must be connected to all the gate drive circuits GD arranged in the first non-bending region NA1 and all the gate drive circuits GD arranged in the second non-bending region NA2, and thus the lines W may be arranged in the enclosure region ZA.

[0081] As described above, the gate drive circuits GD are arranged only in the first non-bending region NA1 and the second non-bending region NA2 of the enclosure region ZA.

[0082] Thus, each of the gate drive circuits GD and the plurality of gate lines GL2, GL3, and GL4 connecting each of the pixel drive circuits PD are also arranged only in the first non-bending region NA1 and the second non-bending region NA2. For example, as shown in Fig. 5, the second gate drive circuit GD2 and the second gate line GL2 connecting the second pixel drive circuit PD2, the third gate drive circuit GD3 and the third gate line GL3 connecting the third pixel drive circuit PD3, and the fourth gate drive circuit GD4 and the fourth gate line GL4 connecting the fourth pixel drive circuit PD4 are all arranged in the first non-bending region NA1 and are not arranged in the bending region BA.

[0083] In the organic light-emitting display panel 400, if the bending region BA is repeatedly bent, stress is repeatedly applied to elements arranged in the bending region BA. Cracks caused by the stress generated during bending are likely to occur in the bezel region ZA, which is an outer peripheral region of the organic light-emitting display panel 400. Furthermore, cracks occurring in conductive layers or insulating layers in the bezel region ZA may propagate to other elements arranged in the active region AA. Therefore, it is very important to suppress the occurrence of cracks in the bezel region ZA when the bending region BA is bent.

[0084] Thus, in the organic light-emitting display panel 400 according to another exemplary embodiment of the present disclosure, the gate drive circuits GD such as thin-film transistors and capacitors for supplying gate signals via the gate lines GL2, GL3, and GL4 are arranged only in the first non-bending region NA1 and the second non-bending region NA2 and not in the bending region BA, thereby minimizing stress on the elements such as the thin-film transistors and capacitors included in the gate drive circuits GD when the bending region BA is repeatedly bent. Thus, deterioration of the device characteristics of the drive elements included in the gate drive circuits GD can be reduced or prevented.Furthermore, the gate drive circuits GD, which may be broken due to the stress generated when the bending region BA is bent, are arranged in the first non-bending region NA1 or the second non-bending region NA2 of the bezel region ZA of the organic light-emitting display panel 400. Therefore, the occurrence of cracks in the bezel region ZA, which overlaps with the bending region BA, can be reduced when the bending region BA is bent. Furthermore, the propagation of cracks occurring in the bezel region ZA to the active region AA can also be reduced.

[0085] Fig. 6 and Fig. 7 are perspective views of an organic light-emitting display device according to an exemplary embodiment of the present disclosure. Fig. The organic light-emitting display device 1000 shown in Fig. 6 is an organic light-emitting display device to which the Fig. 1 to 3, and redundant descriptions thereof will be omitted. However, the present disclosure is not limited thereto, and the organic light-emitting display device 1000 may include the organic light-emitting display devices shown in Fig. 4 and Fig. 5 shown organic light emitting display panel 400. Fig. 7 illustrates a case where the organic light emitting display device 1000 is bent.

[0086] As in Fig. 6, the organic light emitting display device 1000 includes a housing 600 and the organic light emitting display panel 100.

[0087] The housing 600 includes a first housing 610 and a second housing 620, and a flexure 630 disposed between the first housing 610 and the second housing 620 and connecting the first housing 610 and the second housing 620. The first housing 610 surrounds the first non-flexure region NA1 of the organic light-emitting display panel 100 and covers a part of the top surface, a side surface, and a bottom surface of the organic light-emitting display panel 100 corresponding to the first non-flexure region NA1. The second housing 620 surrounds the second non-flexure region NA2 of the organic light-emitting display panel 100 and covers a part of the top surface, a side surface, and a bottom surface of the organic light-emitting display panel 100 corresponding to the second non-flexure region NA2. However, the shapes of the first housing 610, the second housing 620, and the flexure 630 are not limited thereto.

[0088] The flexure 630 is disposed between the first housing 610 and the second housing 620 and mechanically connects the first housing 610 to the second housing 620. The flexure 630 covers a part of a top surface, a side surface, and a bottom surface of the organic light-emitting display panel 100 corresponding to the flexure region BA. The flexure 630 may be formed to have a mechanical structure such as a hinge structure, and the organic light-emitting display panel 100 may be bent by the hinge structure of the flexure 630. Alternatively, the flexure 630 may be formed of a material having flexibility, and the organic light-emitting display panel 100 may be bent by directly bending the flexure 630.Thus, the bending region BA of the organic light-emitting display panel 100 can be defined as a region of the organic light-emitting display panel 100 surrounded by the bending element 630.

[0089] Although Fig. 6 illustrates the first housing 610, the second housing 620, and the flexure 630 as being formed separately, the present disclosure is not limited thereto, and the first housing 610, the second housing 620, and the flexure 630 may be formed as one body.

[0090] As in Fig. As shown in Figure 7, the organic light-emitting display device 1000 may be configured to be bendable in one direction. That is, if a part of the organic light-emitting display panel 100 surrounded by the first housing 610 is moved in a Z-axis direction, the bending element 630 is bent, so that a part of the organic light-emitting display panel 100 surrounded by the bending element 630 can be bent. Furthermore, although in Fig. 7, if a part of the organic light-emitting display panel 7 surrounded by the second casing 620 is moved in the Z-axis direction, the bending member 630 is bent so that the part of the organic light-emitting display panel 100 surrounded by the bending member 630 can be bent.

[0091] As described above, if the part of the organic light-emitting display panel 100 surrounded by the bending member 630 is bent, stress is applied to the elements arranged in the bent part of the organic light-emitting display panel 100. However, the parts of the organic light-emitting display panel 100 surrounded by the first housing 610 and the second housing 620 remain in a flat state. Thus, even if the organic light-emitting display device 1000 is bent, no stress is applied to the parts of the organic light-emitting display panel 100 surrounded by the first housing 610 or the second housing 620. Therefore, the elements such as the first housing 610 and the second housing 620 are not subjected to stress.the thin-film transistors or capacitors arranged on the organic light-emitting display panel 100 surrounded by the first case 610 or the second case 620 are not subjected to stress, and thereby damage to them is reduced.

[0092] Thus, in the organic light-emitting display device 1000 according to an exemplary embodiment of the present disclosure, pixel drive circuits electrically connected to organic light-emitting elements arranged in the part of the organic light-emitting display panel 100 surrounded by the bending member 630 are arranged among the plurality of organic light-emitting elements in the part of the organic light-emitting display panel 100 surrounded by the first housing 610 or the second housing 620. Furthermore, the organic light-emitting display device 1000 may further include the gate drive circuits of the Fig. 4 and Fig.5. In such a case, the thin-film transistors and capacitors of the gate drive circuits for applying a gate signal to the pixel drive circuits are also arranged in the part of the organic light-emitting display panel 100 surrounded by the first housing 610 and the second housing 620. Therefore, in the case of bending the bending region BA of the organic light-emitting display device 1000, stress applied to the elements such as the thin-film transistors and capacitors included in the pixel drive circuits or the gate drive circuits can be minimized. Furthermore, deterioration of the electrical characteristics of the drive elements can also be minimized, and thereby the reliability of the organic light-emitting display device 1000 is improved.

[0093] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be embodied in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure.

Claims

[1] Organic light-emitting display panel comprising: a flexible substrate (110) including a first non-bending region (NA1), a second non-bending region (NA2), and a bending region (BA) between the first non-bending region (NA1) and the second non-bending region (NA2); a plurality of organic light-emitting elements (170) arranged in the first non-bending region (NA1), the second non-bending region (NA2), and the bending region (BA), each of the plurality of organic light-emitting elements (170) including an anode (142), an organic emission layer (150), and a cathode (160); and a plurality of pixel drive circuits (PD) each electrically connected to the plurality of organic light-emitting elements (170), wherein the plurality of pixel drive circuits (PD) are arranged only in the first non-bending region (NA1) and the second non-bending region (NA2) on the flexible substrate (110), and the plurality of organic light-emitting elements (170) arranged in the bending region (BA) are each connected to a pixel drive (PD) arranged in the first non-bending region (NA1) or in the second non-bending region (NA2). [2] The organic light emitting display panel according to claim 1, wherein the flexible substrate (110) includes an active region (AA) and a bezel region (ZA) surrounding the active region (AA), the active region (AA) including the plurality of organic light emitting elements (170) and the plurality of pixel driving circuits (PD). [3] The organic light emitting display panel according to claim 1 or 2, further comprising a gate drive circuit (GD) in the bezel region (ZA), the gate drive circuit (GD) including a thin film transistor and a capacitor. [4] The organic light emitting display panel according to claim 2 and 3, wherein the thin film transistor and the capacitor of the gate drive circuit (GD) are arranged in the first non-bending region (NA1) and the second non-bending region (NA2) overlapping with the active region (AA). [5] An organic light emitting display panel according to claim 3 or 4, further comprising: a plurality of gate lines (GL) connecting the gate drive circuit (GD) and the plurality of pixel drive circuits (PD), wherein the plurality of gate lines (GL) are arranged in the first non-bending region (NA1) and the second non-bending region (NA2). [6] The organic light emitting display panel according to any one of the preceding claims, wherein the number of organic light emitting elements (170) in the first non-bending region (NA1) and the second non-bending region (NA2) is smaller than the number of pixel driving circuits (PD) in the first non-bending region (NA1) and the second non-bending region (NA2). [7] An organic light emitting display panel according to any preceding claim, wherein the number of pixel driving circuits (PD) per unit area in the first non-bending area (NA1) and the number of pixel driving circuits (PD) per unit area in the second non-bending area (NA2) decreases as a distance from the bending area (BA) increases. [8] The organic light emitting display panel according to any one of the preceding claims, further comprising a connecting line (130) connecting the anode (143) of the organic light emitting element (173) in the bending region (BA) and the pixel driving circuit (PD) in the first non-bending region (NA1) or the second non-bending region (NA2). [9] The organic light emitting display panel according to claim 8, wherein the connecting line (130) comprises a material that is the same as the material of one of a source electrode (123), a drain electrode (124) and a gate electrode (122) of the pixel driving circuit (PD). [10] The organic light emitting display panel according to claim 9, wherein the connecting line (130) is an extension of one of the source electrode (123) and the drain electrode (124). [11] An organic light emitting display panel according to any one of the preceding claims, wherein one or more lines and one or more insulation layers are arranged between the flexible substrate (110) and the organic light emitting elements (170) in the bending region (BA). [12] An organic light emitting display panel according to any preceding claim, wherein the anode (142, 143) includes a reflective layer comprising a metal material and a transparent conductive layer comprising a transparent conductive material, the transparent conductive layer being on the reflective layer. [13] Organic light emitting display device comprising: a housing (600) including a first housing (610), a second housing (620), and a flexure (630) connecting the first housing (610) and the second housing (620); and an organic light-emitting display panel (100) surrounded by the housing (600) and including a plurality of organic light-emitting elements (170) and a plurality of pixel drive circuits (PD) each electrically connected to the plurality of organic light-emitting elements (170), wherein the plurality of pixel drive circuits (PD) are arranged in a part of the organic light emitting display panel (100) surrounded by the first housing (610) and the second housing (620). [14] The organic light emitting display device according to claim 13, further comprising a gate drive circuit (GD) including a thin film transistor and a capacitor, wherein the thin film transistor and the capacitor are arranged in the part of the organic light emitting display panel (100) surrounded by the first housing (610) and the second housing (620). [15] The organic light emitting display device according to claim 13 or 14, wherein the bending element (630) bends the organic light emitting display device in one direction.

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