TW201417068A - Foldable display device - Google Patents

Abstract

A foldable display device including a case that stably supports a flexible display panel for improving user convenience is disclosed. In one aspect, the foldable display device includes a flexible display panel including a foldable area between lateral plane areas thereof and a pair of front cases surrounding a front perimeter of the flexible display panel. The device also includes a pair of bottom cases coupled with the pair of front cases to house the flexible display panel and a biaxial hinge member mounted to the bottom case in the foldable area to connect the pair of front cases to respective rotation points.

Description

Foldable display device

SUMMARY OF THE INVENTION The present invention relates to a foldable display device that can be unfolded and folded.

A foldable display device typically utilizes a flexible, flexible display. The foldable display device is easy to carry when folded, and has a relatively large screen when deployed when compared to a portable size. Therefore, the foldable display device can be used not only as a mobile device (such as a mobile phone, an ultra mobile personal computer, an e-book, etc.) but also in various other applications, including as a television set and a computer monitor. Wait.

The foldable display device is typically provided with a housing for supporting a flexible display panel. The housing is typically formed to support one of the bottom sides of the flexible display panel, the flexible display panel having a folded region between its side planar regions. For example, the housing includes a flat portion and a convex curved portion corresponding to the side planar region, and the convex curved portion corresponds to the folded region and is connected to the side flat portion by a hinge.

When the foldable display device is folded, the curved portion becomes convex and surrounds the folded area of the flexible display panel to support the flexible display panel. however, When the foldable display device is unfolded, the curved portion has a convex projection on the opposite side of the flexible display panel.

Therefore, when the foldable display device is unfolded, the outwardly convex curved portion protrudes from the display panel, and thus the flat folded region cannot be supported. That is, the folded area and the curved portion of the flexible display panel are kept at a distance from each other, so that the convenience of the user can be adversely affected.

The above information disclosed in this Background section is only intended to facilitate an understanding of the background of the technology, and thus may include prior art information that is not known to those of ordinary skill in the art. .

One aspect of the invention is a foldable display device that includes a housing that stably supports a flexible display panel, thereby improving the convenience of the device to a user.

Another aspect is a foldable display device comprising: a flexible display panel comprising a foldable region between side planar regions thereof; a pair of front housings surrounding a front side of the flexible display panel a pair of bottom housings respectively coupled to the pair of front housings to accommodate the flexible display panel; and a biaxial hinge member mounted to the bottom housing in the foldable region The pair of front housings are connected to respective points of rotation.

Each of the bottom housings includes a side planar portion corresponding to one of the planar regions, and the foldable display device further includes a curved portion connecting the lateral planes in an area corresponding to the foldable region unit.

The curved portion may include two half-curved portions respectively connected to the side flat portions, and the two semi-bend portions may be connected via a hinge portion to be folded or unfolded .

The biaxial hinge member may include: a body disposed outside one of the bottom housings; a mounting portion formed inside one of the bodies and mounted in the hinge portion; and a connecting portion at a distance from the mounting portion A distance is coupled to one of the holes of the body by a hinge and to the pair of front housings.

Another aspect is a display device comprising a pair of support members disposed between the flexible display panel and the bottom housing in the planar regions, and the pair of support members are A pair of hinges are mounted to the pair of front housings to support the flexible display panel.

The biaxial hinge member may further include a control member formed on one side of the connecting portion on one side of the connecting portion to closely attach the pair of supporting members to the flexible display panel.

The two semi-curved portions may further include first curved protruding portions formed to protrude from ends of the two semi-curved portions to accommodate the control member.

The pair of front housings may further include second curved protrusions formed to protrude from the ends of the pair of front housings corresponding to the first curved protrusions to accommodate the first portion a curved protrusion and the control member.

The first curved protrusions and the second curved protrusions may be formed on the inner sides of the outer sides of the front and bottom housings, and may be recessed at least inwardly The sum of the thickness of the body and the thickness of the joint.

The foldable display device can further include a first support member and a second support member. The first support member and the second support member are disposed between the flexible display panel and the bottom housing. The flexible display panel is supported in an equi-plane area.

The first support member may be attached to the first front case of the pair of front case by a hinge, and may be hinged by providing a sliding member to the second bottom case of the bottom case. The second support is mounted to the sliding member.

The second bottom housing may be provided with a rail for guiding the sliding member to move, and the sliding member may be coupled to the rail and connected to an actuator.

The second bottom case may be provided with a support member protruding from the second bottom case, and the actuator may be formed as a spring member embedded between the sliding member and the support portion .

Another aspect is a foldable display device comprising: a flexible display panel having a folded area between the side planar areas; a housing for receiving the flexible display panel; a biaxial hinge member for connecting the housing to the rotation point in the folded region; and a support member disposed in the housing in the planar region to be mounted to the housing by a hinge The flexible display panel is supported.

The biaxial hinge member can include a control member that supports an end of the support member in the folded region to closely attach the support member to the flexible display panel.

The support member may include a first support member and a second support member. The first support member and the second support member support the flexible display panel. The first support member may be hingedly mounted to the housing. Side, and the second support member can be attached to the sliding member by a hinge by providing a sliding member on the other side of the housing.

10‧‧‧Flexible display panel

11‧‧‧Flexible substrate

12‧‧‧Seal substrate

20‧‧‧shell

21‧‧‧ first housing

22‧‧‧ second housing

23‧‧‧Bend

24‧‧‧ Hinge section

30‧‧‧Biaxial hinge members

31‧‧‧Ontology

32‧‧‧Installation Department

33‧‧‧Connecting Department

34‧‧‧Controls

41‧‧‧First support

42‧‧‧second support

50‧‧‧Switching film transistor

51‧‧‧Switching semiconductor layer

52‧‧‧Switching gate electrode

53‧‧‧Switching source electrode

54‧‧‧Switching electrode

60‧‧‧Drive film transistor

61‧‧‧Drive semiconductor layer

62‧‧‧Drive gate electrode

63‧‧‧Drive source electrode

64‧‧‧ drive 汲 electrode

70‧‧‧ capacitor

71‧‧‧ capacitor electrode

72‧‧‧ capacitor electrode

81‧‧‧ gate line

82‧‧‧Information line

83‧‧‧Common power line

85‧‧‧Interlayer insulation

91‧‧‧ pixel electrodes

92‧‧‧Organic light-emitting layer

93‧‧‧Common electrode

100‧‧‧Foldable display device

101‧‧‧planar area

102‧‧‧planar area

103‧‧‧Foldable area

161‧‧‧Sliding members

162‧‧‧ Track

163‧‧‧Actuator

164‧‧‧Support

200‧‧‧Foldable display device

211‧‧‧First front housing

212‧‧‧First bottom housing

213, 223‧‧‧Flat Department

214, 224‧‧‧ second curved protrusion

221‧‧‧Second front shell

222‧‧‧second bottom housing

231, 232‧‧‧ semi-bend

251, 252‧‧‧ first curved protrusion

311‧‧‧ hole

331‧‧‧ Hinges

411‧‧‧ Hinges

421‧‧‧ Hinges

DC‧‧‧ pixel circuit

L‧‧‧ length

OLED‧‧ Organic Light Emitting Diode

S1‧‧‧ screws

S2‧‧‧ screws

X, y, z‧‧‧ number axis

Lines III-III, VI-VI‧‧

1 is a perspective view of a foldable display device according to an exemplary embodiment; FIG. 2 is an exploded perspective view of the foldable display device shown in FIG. 1; and FIG. 3 is a line III-III 1 is a cross-sectional view of the foldable display device shown in FIG. 1; FIG. 4 is a cross-sectional view of the foldable display device shown in FIG. 3 in a folded state; and FIG. 5 is a flexible view shown in FIG. A layout view of a pixel structure of the display panel; FIG. 6 is a cross-sectional view of the flexible display panel shown in FIG. 5 taken along line VI-VI; and FIG. 7 is a view according to a second exemplary embodiment. A cross-sectional view of the foldable display device; and Fig. 8 is a cross-sectional view of the foldable display device shown in Fig. 7 in a folded state.

The invention will be described more fully hereinafter with reference to the accompanying drawings in which FIG. It will be appreciated by those skilled in the art that the described embodiments can be modified in various different ways without departing from the spirit or scope of the invention.

The drawings and description are to be regarded as illustrative and not restrictive. Throughout the specification, the same reference numerals are given to the same elements. In addition, the dimensions and thickness of the various components shown in the drawings are merely for convenience of understanding and convenience of description, but the techniques are not limited thereto.

In the drawings, the thickness of layers, films, panels, regions, etc., may be exaggerated for clarity. In the drawings, the thickness of certain layers and regions may be exaggerated for the purposes of illustration and description. It will be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element may be directly on the other element or the intermediate element may be present.

1 is a perspective view of a foldable display device according to an exemplary embodiment, and FIG. 2 is an exploded perspective view of the foldable display device shown in FIG. 1. Referring to FIGS. 1 and 2, a foldable display device 100 according to an exemplary embodiment includes: a flexible display panel 10; a housing 20 for housing the flexible display panel 10; and a dual axis The hinge member 30 is for connecting the lower portion and the upper portion of the housing 20.

In some embodiments, the flexible display panel 10 includes a flexible film (eg, a plastic film) and utilizes an organic light-emitting diode (OLED) and is disposed on the flexible film. A pixel circuit to display an image. The detailed structure of the flexible display panel 10 will be described later.

A cover window (not shown) is disposed on the outer side of the flexible display panel 10 for displaying an image. The cover window may be formed of a transparent hard material to transmit the image displayed by the flexible display panel 10 and protect the flexible display panel 10 from external impact.

A touch panel (not shown) for sensing a touch operation of the user may be disposed between the flexible display panel 10 and the cover window. The flexible display panel 10, the touch panel, and the cover window form a display module. Therefore, in the present exemplary embodiment, the flexible display panel 10 can include a display module.

In the foldable display device 100, the flexible display panel 10 includes: planar regions 101 and 102 disposed on both sides of the flexible display panel 10; and a foldable region (hereinafter, common to a folded region) 103, Formed between the planar regions 101 and 102.

The housing 20 includes a first housing 21 and a second housing 22, which respectively correspond to a planar area 101 on one side and a planar area 102 on the other side. The first housing 21 and the second housing 22 are coupled in the foldable region 103 to accommodate the flexible display panel 10.

The first housing 21 houses a planar area 101 on one side and the second housing 22 houses a planar area 102 on the other side. The rotation points of each of the first housing 21 and the second housing 22 are connected to each other by the biaxial hinge member 30 in the foldable region 103.

In addition, the first housing 21 includes a first front housing 211 and a first bottom housing 212. The first front housing 211 substantially surrounds the flexible display panel 10 The entire perimeter (or edge) of the planar region 101 is coupled to the first front housing 211 to accommodate the planar region 101.

The second housing 22 includes a second front housing 221 and a second bottom housing 222. The second front housing 221 surrounds the entire perimeter of the planar region 102 of the flexible display panel 10, while the second bottom housing 222 is coupled to the second front housing 221 to accommodate the planar region 102.

The biaxial hinge member 30 is disposed corresponding to the side of the foldable region 103 of the flexible display panel 10, and one side of the biaxial hinge member 30 is mounted to the first bottom case 212 and the second bottom case 222, and the other The side biaxial hinge member 30 is coupled to the respective rotation points of the first front housing 211 and the second front housing 221 .

For example, the first bottom case 212 and the second bottom case 222 include planar portions 213 and 223 formed in the side surfaces to correspond to the planar regions 101 and 102, and a curved portion 23 connecting the planar portions 213 and 223 .

The bent portion 23 is connected to the flat portions 213 and 223, and is divided into two half curved portions 231 and 232. The two half-bends 231 and 232 are connected to a hinge portion 24 to be folded or unfolded.

When the foldable display device 100 is unfolded, the planar regions 101 and 102 of the flexible display panel 10 are supported by the planar portions 213 and 223 of the first bottom case 212 and the second bottom case 222, and at the same time the foldable region 103 It is unfolded and thus supported by the hinge portion 24.

The biaxial hinge member 30 includes: a body 31; a mounting portion 32 installed in the first bottom case 212 and the second bottom case 222; and a connecting portion 33, It is connected to the first front case 211 and the second front case 221 . Alternatively, the connecting portion 33 may be coupled to the first bottom case 212 and the second bottom case 222. The connecting portion 33 can also be connected to the front housings 211 and 221 and also to the bottom housings 212 and 222.

In some embodiments, the body 31 is disposed on the outer sides of the first bottom case 212 and the second bottom case 222, and the mounting portion 32 protrudes into the body 31 and is mounted to the hinge portion 24 by the screw S1. The mounting portion 32 is provided on the outer side of the hinge portion 24 and fixed by a screw S1. The connecting portions 33 are spaced apart from the mounting portion 32 and rotatably coupled to the holes 311 of the body 31 by a hinge 331 , and the connecting portions 33 are embedded in the first front housing 211 and the second front housing 221 . And the connection is made by the screw S2. The connecting portion 33 rotates around the outer periphery of the hinge 331 in a circular shape.

The foldable display device 100 can further include a first support member 41 and a second support member 42 for supporting the flexible display panel 10 in a folded or unfolded state. The first support member 41 and the second support member 42 can support the flexible display panel 10 more stably in the display device 100.

For example, the first support member 41 is disposed between the flexible display panel 10 and the first bottom case 212, and is rotatably mounted to the first front case 211 in a planar area 101 by a hinge 411.

The second support member 42 is disposed between the flexible display panel 10 and the second bottom case 222 and rotatably mounted to the second front case 221 in the planar region 102 by a hinge 421.

Therefore, when the foldable display device 100 is unfolded, the first support member 41 and the second support member 42 are rotated relative to the hinges 411 and 421, respectively. The flexible display panel 10 is supported separately.

As described above, the opposite ends of the hinges 411 and 421 of the first support member 41 and the second support member 42 should be supported to rotate the first support member 41 and the second support member 42 for supporting the flexible display panel 10. The operation is stable at the time.

To this end, the biaxial hinge member 30 can be provided with a control member 34. The control member 34 is formed inside one side of the body 31 in the side of the connection portion to closely attach the first support member 41 and the second support member 42 to the flexible display panel 10. Further, one end of the control member 34 is bent in the rotational direction of the first support member 41 and the second support member 42 to minimize contact friction generated when the first support member 41 and the second support member 42 are rotated.

The control member 34 has a step structure to prevent the connection portion 33 from being interrupted when rotated in the inner side of the body 31, and has a first support member 41 and a second support outside the rotation region of the connection portion 33. One width L is set in the width direction of the member 42 (i.e., the y-axis direction shown in Fig. 2).

The half curved portions 231 and 232 of the first bottom case 212 and the second bottom case 222 further include first curved protrusions 251 and 252 protruding from the ends thereof. The first curved projections 251 and 252 accommodate the control members 34 that rotatably support the circular periphery of the connecting portion 33 on the hinge 333 side inside the half curved portions 231 and 232.

The first front case 211 and the second front case 221 further include: second curved protrusions 214 and 224 formed to protrude from ends of the first front case 211 and the second front case 221 to correspond to the first A curved protrusion 251 and 252. The second curved protrusions 214 and 224 accommodate the first curved protrusions 251 and 252 and control Item 34. This arrangement supports the connection portion 33 to rotate around the hinge 331 inside the half-bend portions 231 and 232.

The first curved protrusions 251 and 252 and the second curved protrusions 214 and 224 are formed on the inner side of the outer side of the front case and the bottom case (ie, located inside the front case and the bottom case in the y-axis direction) . The first curved protrusions 251 and 252 and the second curved protrusions 214 and 224 may be recessed from the outside toward the inside to at least the sum of the thickness of the body and the thickness of the connecting portion 33.

3 is a cross-sectional view of the foldable display device shown in FIG. 1 taken along line III-III, and FIG. 4 is a cross-sectional view of the foldable display device shown in FIG. 3 in a folded state.

Referring to FIGS. 3 and 4, a printed circuit board and a battery (not shown) are disposed on the first support member 41 and the second support member 42 and the first bottom case 212 and the second bottom case. Between 222 to drive a flexible printed circuit (FPC).

As shown in FIG. 3, when the foldable display device 100 is unfolded, the flexible display panel 10 is in a substantially planar state. In this case, the first bottom case 212 and the second bottom case 222 installed in the mounting portion 32 of the biaxial hinge member 30 and the first front case 211 and the second front case connected to the connecting portion 33 Body 221 is in a substantially planar state.

The first support member 41 and the second support member 42 are rotated from the first front case 211 and the second front case 221 toward the flexible display panel 10 by the hinges 411 and 421, and the first support member 41 and the second support member 41 The opposite ends of the support member 42 are controlled The piece 34 enhances one of the supporting forces to support the flexible display panel 10 in an unfolded state.

As shown in FIG. 4, when the foldable display device 100 is folded, the flexible display panel 10 is in a folded state. In this case, the first bottom case 212 and the second bottom case 222 installed in the mounting portion 32 of the biaxial hinge member 30 and the first front case 211 and the second front case connected to the connecting portion 33 The body 221 is in a folded state.

The first support member 41 and the second support member 42 rotate from the first front housing 211 and the second front housing 221 toward the first bottom housing 212 and the second bottom housing 222 around the hinges 411 and 421, and The support force provided by the control member 34 of the hinge member 30 is weakened, so that the folded flexible display panel 10 is supported by the opposite ends of the first support member 41 and the second support member 42.

As described above, when the foldable display device 100 is unfolded, by applying the biaxial hinge member 30, the bent portion 23 can stably support the flexible display panel 10 without facing the first bottom case 212 and the second bottom case Body 222 is prominent.

In addition, the first support member 41 and the second portion are disposed in the first bottom case 212 and the second front case 221 and the first bottom case 212 and the second bottom case 222 connected to the biaxial hinge member 30. With the support member 42, the flexible display panel 10 can be more stably supported.

Fig. 5 is a layout view of a pixel structure of the flexible display panel shown in Fig. 1, and Fig. 6 is a cross-sectional view of the flexible display panel shown in Fig. 5 taken along line VI-VI. The flexible display panel 10 is not limited to the structure described below, and may be an organic light emitting diode display or a flexible liquid crystal display having a different structure. (LCD) formation.

Referring to FIGS. 5 and 6, the flexible display panel 10 includes a pixel circuit DC and an organic light emitting diode OLED formed in each pixel. The pixel circuit DC includes a switching thin film transistor 50, a driving thin film transistor 60, and a capacitor 70. In addition, the flexible display panel 10 includes: a gate line extending in one direction; a data line; and a common power line 83. The data line 82 and the shared power line 83 intersect the gate line 81 and are insulated from the gate line 81.

Here, one pixel may be defined by one boundary of the gate line 81, the data line 82, and the shared power line 83, but is not limited thereto. The pixel is a basic unit for displaying an image. The flexible display panel 10 displays an image using a plurality of pixels.

In Fig. 5, an active matrix flexible display panel 10 having a 2Tr-1Cap (dual transistor single capacitor) structure is illustrated, in which two thin films are provided in one pixel. Crystals 50 and 60 are connected to a capacitor 70. However, the structure of the flexible display panel 10 is not limited to the illustrated example. The flexible display panel 10 may also include not less than three thin film transistors and not less than two capacitors. An additional wire may be formed in the flexible display panel 10, and the flexible display panel 10 may have various other structures.

The organic light emitting diode OLED includes a pixel electrode 91, an organic light emitting layer 92, and a common electrode 93. One of the pixel electrode 91 and the common electrode 93 is a hole injection electrode, and the other is an electron injection electrode. When the electron and hole self-pixel electrode 91 and the common electrode 93 are injected into the organic light-emitting layer 92 and the excitons return to the ground state due to the recombination of the holes and the electrons, Light up.

The pixel electrode 91 is formed of a metal having high reflectivity, and the common electrode 93 may be formed of a transparent conductive layer. In this case, the light generated by the organic light-emitting layer 92 is reflected by the pixel electrode 91 and transmitted through the common electrode 93 and a sealing substrate 12 to be emitted to the outside. In Fig. 6, reference numeral 11 denotes a flexible substrate.

The capacitor 70 includes a pair of capacitor electrodes 71 and 72, and an interlayer insulating layer 85 is interposed between the pair of capacitor electrodes 71 and 72 as a dielectric material. The capacitance is determined by the charge stored in capacitor 70 and the voltage between the two capacitor electrodes 71 and 72.

The switching thin film transistor 50 includes a switching semiconductor layer 51, a switching gate electrode 52, a switching source electrode 53, and a switching gate electrode 54. The driving thin film transistor 60 includes a driving semiconductor layer 61, a driving gate electrode 62, a driving source electrode 63, and a driving germanium electrode 64.

The switching semiconductor layer 51 and the driving semiconductor layer 61 may be formed of a polysilicon or an oxide semiconductor. The oxide semiconductor may include titanium (Ti), hafnium (Hf), zirconium (Zr), aluminum (Al), tantalum (Ta), germanium (Ge), zinc (Zn), gallium (Ga), tin (Sn And at least one of an oxide of indium (In) and a compound oxide thereof, for example, zinc oxide (ZnO), indium gallium zinc oxide (InGaZnO4), indium zinc oxide (Zn-In-O), Zn-Sn-O, In-Ga-O, In-Sn-O, In-Zr-O, Indium Zirconium Zinc oxide (In-Zr-Zn-O), indium-zirconium tin oxide (In-Zr-Sn-O), indium-zirconium-gallium oxide (In-Zr-Ga-O), indium aluminum oxide (In- Al-O), Indium-Zn-Al-O, In-Sn-Al-O, In-Al-Ga-O, Indium-Yttrium Oxide (In-Ta-O), indium-tellurium-zinc oxide (In-Ta-Zn-O), indium-tin-tin oxide (In-Ta-Sn-O), indium-tellurium-gallium oxide (In-Ta-Ga- O), indium germanium oxide (In-Ge-O), indium germanium zinc oxide (In-Ge-Zn-O), indium antimony tin oxide (In-Ge-Sn-O), indium germanium gallium oxide (In-Ge-Ga-O), titanium indium zinc oxide (Ti-In-Zn-O), and bismuth indium zinc oxide (Hf-In-Zn-O).

The switching semiconductor layer 51 and the driving semiconductor layer 61 respectively include a channel region (not doped with impurities), a source region, and a drain region. The source region and the drain region are respectively formed on both sides of the channel region and doped with impurities. Here, the impurities used depend on the type of the thin film transistor, and may contain an N-type impurity or a P-type impurity.

When the switching semiconductor layer 51 and the driving semiconductor layer 61 are formed of an oxide semiconductor, an additional protective layer may be added to protect the oxide semiconductor from an external environment such as a high temperature.

The switching film transistor 50 is used as a switch to select a pixel for illumination. The switch gate electrode 52 is connected to the gate line 81. The switching source electrode 53 is connected to the data line 82, and the switching electrode 54 is connected to one capacitor electrode 71.

The driving film transistor 60 is used to apply a driving power of one of the selected elements of the organic light-emitting layer 92 to the pixel electrode 91. The drive gate electrode 62 is connected to the capacitor electrode 71, and the capacitor electrode 71 is connected to the switch electrode 54. The drive source electrode 63 and the other capacitor electrode 72 are connected to the common power line 83. The driving crucible electrode 64 is connected to the pixel electrode 91 of the organic light emitting diode OLED via a contact hole.

The switching thin film transistor 50 is driven by a gate voltage applied to one of the gate lines 81 to transfer a data voltage applied to the data line 82 to the driving thin film transistor 60. A voltage corresponding to a voltage difference between a common voltage applied from the shared power line 83 to the driving thin film transistor 60 and a data voltage transmitted from the switching thin film transistor 50 is stored in the capacitor 70 and stored in the capacitor 70. One of the voltages corresponding to the current flows through the driving thin film transistor 60 to the organic light emitting diode OLED, so that the organic light emitting layer 92 emits light.

The organic light-emitting layer 92 may be formed of a low polymer organic material or a high polymer organic material (for example, poly 3,4-ethylene dioxythiophene (PEDOT)). In addition, the organic light-emitting layer 92 can be formed as a multilayer comprising a light-emitting layer, a hole injection layer (HIL), a hole transporting layer (HTL), An at least one of an electron transport layer (ETL) and an electron injection layer (EIL). Hole injection layer (HIL) when the multilayer contains the owner of the light-emitting layer, hole injection layer (HIL), hole transport layer (HTL), electron transport layer (ETL), and electron injection layer (EIL) It is disposed on the pixel electrode 91 (which is a positive electrode), and the hole transport layer (HTL), the light emitting layer, the electron transport layer (ETL), and the electron injection layer (EIL) are sequentially stacked on the hole injection layer. (HIL).

The organic light-emitting layer 92 may include a red organic light-emitting layer that emits red light, a green organic light-emitting layer that emits green light, and a blue organic light-emitting layer that emits blue light, and the red organic light-emitting layer, the green organic light-emitting layer, and the blue light. The color organic light emitting layers are respectively formed in red pixels, green pixels, and blue pixels to display a color image image.

In addition, the organic light-emitting layer OL may layer the red organic light-emitting layer, the green organic light-emitting layer, and the blue organic light-emitting layer together in a red pixel, a green pixel, and a blue pixel, and each corresponding pixel A red color filter, a green color filter, and a blue color filter may be disposed to display a color image. Alternatively, a white organic light emitting layer emitting white light may be formed in each of the red, green, and blue pixels, and a red color filter and a green color filter may be disposed in each corresponding pixel. The film and the blue color filter are used to display a color image. When a color image is displayed by using the white organic light-emitting layer and the color filter, it is not necessary to use a deposition mask for depositing a red organic light-emitting layer, a green organic light-emitting layer, and a blue organic light-emitting layer to each corresponding pixel. ).

The white organic light-emitting layer described in another example may be formed in one organic light-emitting layer and include one configuration in which white light may be emitted by stacking a plurality of organic light-emitting layers. For example, the white organic light emitting layer may include: a white light emitting one by combining at least one yellow organic light emitting layer and at least one blue organic light emitting layer, and combining at least one cyan organic light emitting layer And at least one red organic light-emitting layer emitting one of white light, and one of white light can be emitted by combining at least one magenta organic light-emitting layer and at least one green organic light-emitting layer.

Hereinafter, a second exemplary embodiment will be explained. In this second exemplary embodiment, the description of the same configuration as the first exemplary embodiment will be omitted, and only the differences from the first exemplary embodiment will be explained in detail.

Figure 7 is a foldable type according to the second exemplary embodiment. A cross-sectional view of the display device. Fig. 8 is a cross-sectional view showing the foldable display device shown in Fig. 7 in a folded state. Referring to FIGS. 7 and 8, according to the second exemplary embodiment, a foldable display device 200 is mounted to a housing 20 having a different structure by mounting a first support member 41 and a second support member 42. Each of the corresponding portions is formed.

For example, the first support member 41 is rotatably mounted to a first front housing 211 by a hinge 411, and the second support member 42 is provided with a sliding member 161 between the second support member 222 and the second bottom housing 222. And slidably mounted to the second bottom housing 222. Further, the second support member 42 is rotatably attached to the sliding member 161 by a hinge 421.

In more detail, the second bottom housing 222 is provided with a rail 162, and the sliding member 161 is coupled to the rail 162 and connected to the actuator 163. Therefore, the sliding member 161 can slide the second support member 42 on the rail 162 in accordance with the operation of the actuator 163.

The second bottom housing 222 is provided with a support portion 164 that protrudes from the planar region 102. For example, the actuator 163 is disposed to be embedded in a spring member or a magnet (not shown) between the sliding member 161 and the support portion 164. The spring member pushes the sliding member 161 to the outer edge of the second bottom case 222 by the elastic force of the spring member.

Therefore, when the foldable display device 200 is unfolded, the first support member 41 and the second support member 42 support the planar regions 101 and 102 of the flexible display panel 10 while rotating relative to the hinges 411 and 421, respectively. Further, due to the elastic force of the spring member, the sliding member 161 moves along the rail 162 to the second bottom housing 222. Outer edge. That is, the second support 42 connected to the sliding member 161 stably supports the flexible display panel 10 in the planar region 102.

When the foldable display device 200 is folded, the movement of the flexible display panel 10 may be limited by the first support member 41 and the second support member 42, and thus the flexible display panel 10 may be in the planar regions 101 and 102. Produces wrinkles. For example, when the foldable display device 200 is folded, the rotation amount of the first support member 41 and the second support member 42 is smaller than the displacement of the flexible display panel 10, so the flexible display panel 10 may be in the planar region 101. And wrinkles are generated in 102. However, the second support 42 connected to the sliding member 161 can slide to prevent wrinkles from being formed in the flexible display panel 10.

As described above, according to at least one embodiment, the biaxial hinge member is mounted in the bottom housing in the folded region of the flexible display panel, and the biaxial hinge member is coupled to the rotation point of the front housing, thus being foldable The flexible display panel may be stably supported by the housing when the display device is deployed. Therefore, the convenience of the user operating the foldable display device can be improved.

Although the present invention has been described in connection with the exemplary embodiments of the present invention, it is understood that the invention is not limited to the disclosed embodiments, but rather, the invention is intended to cover the spirit of the scope of the accompanying claims. And various finishes and equivalent settings in the range.

10‧‧‧Flexible display panel

20‧‧‧shell

21‧‧‧ first housing

22‧‧‧ second housing

23‧‧‧Bend

24‧‧‧ Hinge section

30‧‧‧Biaxial hinge members

31‧‧‧Ontology

32‧‧‧Installation Department

33‧‧‧Connecting Department

34‧‧‧Controls

41‧‧‧First support

42‧‧‧second support

100‧‧‧Foldable display device

101‧‧‧planar area

102‧‧‧planar area

103‧‧‧Foldable area

211‧‧‧First front housing

212‧‧‧First bottom housing

213, 223‧‧‧Flat Department

214, 224‧‧‧ second curved protrusion

221‧‧‧Second front shell

222‧‧‧second bottom housing

231, 232‧‧‧ semi-bend

251, 252‧‧‧ first curved protrusion

311‧‧‧ hole

331‧‧‧ Hinges

411‧‧‧ Hinges

421‧‧‧ Hinges

L‧‧‧ length

S1‧‧‧ screws

S2‧‧‧ screws

X, y, z‧‧‧ number axis

Claims (10)

A foldable display device comprising: a flexible display panel comprising a pair of lateral plane areas and a foldable area formed between the side planar areas a pair of front housings surrounding a front periphery of one of the flexible display panels, wherein each of the front housings has a point of rotation, the front housings being at least partially rotated about the points of rotation, wherein the rotations a point adjacent to the foldable region; a pair of bottom housings respectively coupled to the front housing to accommodate the flexible display panel; and a biaxial hinge member formed in the foldable region The front housing and one of the bottom housings are connected to each other by the points of rotation of the front housings. The foldable display device of claim 1, wherein each of the bottom housings includes a side planar portion corresponding to one of the side planar regions, and wherein the foldable display device further comprises a curved portion, the curved portion The side plane portions are connected in an area corresponding to the foldable area. The foldable display device of claim 2, wherein the curved portion includes two half-curved portions, the two semi-bent portions are respectively connected to the side flat portions, and wherein the two The semi-bends are connected via a hinge portion and are configured in a folded state or an unfolded state. The foldable display device of claim 3, wherein the biaxial hinge member comprises: a body disposed outside one of the bottom housings; a mounting portion formed inside one of the body and mounted in the hinge portion; a connecting portion coupled to a hole of the body by a hinge at a distance from the mounting portion and connected to the front surface case. The foldable display device of claim 4, further comprising a pair of support members disposed between the flexible display panel and the bottom housing in the side planar regions, and the pair The support member supports the flexible display panel by being mounted to the front housings with a pair of hinges. The foldable display device of claim 4, further comprising a first support member and a second support member, wherein the first support member and the second support member are disposed on the flexible display panel and the bottom housing Between the supports, the flexible display panel is supported in the side planar regions. The foldable display device of claim 6, wherein the first support member is mounted to a first front case of the front case by a first hinge, and wherein a sliding member is provided One of the bottom housings is a second bottom housing, and a second hinge mounts the second support member to the sliding member. A foldable display device comprising: a flexible display panel comprising a pair of side planar regions and a foldable region formed between the lateral planar regions; a housing for receiving the flex The display panel, wherein the housing has a pair of rotation points, the housing is at least partially rotated about the rotation points, and wherein the rotation points are adjacent to the foldable area; a biaxial hinge member The points of rotation of the housing are connected to each other; A support member is disposed in the housing in the side planar regions to support the flexible display panel. The foldable display device of claim 8, wherein the support member is mounted to the housing by a hinge, and wherein the biaxial hinge member includes a control member, the control member being attached to the foldable region An end of the support member is supported, the end being opposite the hinge to attach the support member to the flexible display panel. The foldable display device of claim 8, wherein the housing comprises a first side and a second side opposite to each other, wherein the support comprises a first support for supporting one of the flexible display panels And a second support member, wherein the first support member is attached to the first side of the housing by a hinge, and wherein a hinge is provided by the hinge member on the second side of the housing Two support members are mounted to the sliding member.