CN113160701A

CN113160701A - Tiled display device

Info

Publication number: CN113160701A
Application number: CN202011217617.0A
Authority: CN
Inventors: 蔡秉勳; 廖士福; 姚怡安; 许育纯; 吴勇勳; 范胜男
Original assignee: Innolux Corp
Current assignee: Innolux Corp
Priority date: 2020-01-22
Filing date: 2020-11-04
Publication date: 2021-07-23
Anticipated expiration: 2040-11-04
Also published as: CN113160701B

Abstract

The invention discloses a splicing display device, which comprises two panels and two protective layers respectively arranged on the two panels, wherein the two protective layers are provided with a contact area, a height H is arranged between the top and the bottom of the contact area, one of the two protective layers is provided with a thickness Tn, a distance Xn is arranged between the upper surface of one of the two panels and the bottom of the contact area, one of the two panels corresponds to the one of the two protective layers, and the height H, the thickness Tn and the distance Xn satisfy the relation that H/(Xn + Tn) < 0.8.

Description

Tiled display device

Technical Field

The present disclosure relates to display devices, and more particularly, to a tiled display device.

Background

Flat panel display devices have characteristics of light weight and thin thickness, and have gradually become mainstream products in the market of display devices, wherein foldable flat panel display devices can meet the requirements of portability and larger display area.

The peripheral area of the tiled display device in the prior art may cause a user to observe a dark area, a deformed picture or a color difference above the tiled junction, which affects the visual quality.

Disclosure of Invention

The disclosure provides a tiled display device, which can reduce the problem that a user observes that the display at the tiled part between two tiled panels is poor, and achieve the purpose of improving the display quality.

The disclosure discloses a tiled display device, comprising two panels and two protective layers respectively disposed on the two panels, wherein the two protective layers have a contact area, a height H is provided between a top and a bottom of the contact area, one of the two protective layers has a thickness Tn, a distance Xn is provided from an upper surface of one of the two panels to the bottom of the contact area, the one of the two panels corresponds to the one of the two protective layers, and the height H, the thickness Tn and the distance Xn satisfy the relation 0 ≦ H/(Xn + Tn) < 0.8.

Drawings

To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures, and it is contemplated that elements disclosed in one embodiment may be utilized in other embodiments without specific recitation. Unless specifically stated otherwise, the drawings herein are not to be understood as drawn to scale, and the drawings are generally simplified and omit details or elements for clarity of presentation and explanation, while the drawings herein and detailed description serve to explain the principles discussed below and to refer to like elements with similar reference numerals.

Fig. 1 is a schematic top view of a tiled display device according to an embodiment of the present disclosure when unfolded.

Fig. 2 is a schematic cross-sectional view illustrating a tiled display apparatus according to an embodiment of the present disclosure in an unfolded state.

Fig. 3 is a schematic view of the tiled display apparatus of the embodiment shown in fig. 2 in an unfolded state in an area near the tiling line.

Fig. 4 is a schematic cross-sectional view illustrating a tiled display apparatus according to another embodiment of the present disclosure in an unfolded state.

Fig. 5 is a schematic view of the tiled display apparatus of the embodiment shown in fig. 4 in an unfolded state in an area near the tiling line.

FIG. 6 is a schematic cross-sectional view of the tiled display apparatus shown in FIG. 4 in a partially folded state.

FIG. 7 is a schematic cross-sectional view illustrating a tiled display apparatus according to yet another embodiment of the present disclosure in an unfolded state.

FIG. 8 is a schematic cross-sectional view of the tiled display apparatus shown in FIG. 7 in a partially folded state.

FIG. 9 is a schematic cross-sectional view illustrating a tiled display apparatus according to still another embodiment of the present disclosure in an unfolded state.

Fig. 10 is a schematic cross-sectional view illustrating a tiled display apparatus according to another embodiment of the present disclosure in an unfolded state.

Description of reference numerals: 10. 10a, 10c, 10 d-a tiled display device; 102-a first support layer; 104 to a second support layer; 11-peripheral circuit elements; 111-1 to dent; 12-a first panel; 121. 141-light emitting area; 121-1, 141-1 to the main light-emitting area; 121-2, 141-2 to auxiliary light emergent area; 14 to a second panel; 16. 18-protective layer; 16a, 18 a-planar area; 18b, 16c, 18 c-curved regions; 22-a first axial center device; 24-second axis device; 26-sharing the axis device; AA-expanded screen display area; AA1 — (ii) a first display area; AA 2-second display area; AA 3-third display area; AA4 to a fourth display area; AX, AX1, AX2, AX 3-splicing line; widths B1, B2, D1, D2, B1 ', B2', W1, W2; BS1, BS 2-lower surface; CR to a contact area; h-height; HSP-horizontal plane; p1, P1' -curved surface starting point; p2, P2' -curved surface terminal point; PR1, PR2, PR1-1, PR1-2, PR2-1, PR2-2 to the peripheral area; R1-Rn, G1-Gn, B1-Bn-pixels; RX 1-first bending axis; RX2 to a second bending axis; RX 3-rotation axis; t1 and T2; TS1, TS2, a display surface and an upper surface; x1, X2, L1, L2, L1 ', L2'. about.distance; z, X, Y-direction; d3-length; d4-length; i-midpoint; j-intersection point; k-intersection point; 111-2 to a gap; CV-conic section; TL 1-tangent line; TL 2-tangent line; CL-section line.

Detailed Description

The present disclosure may be understood by reference to the following detailed description taken in conjunction with the accompanying drawings. It should be noted that in order to facilitate the understanding of the reader and the simplicity of the drawings, the various drawings in the present disclosure depict only a portion of a display device and certain elements of the drawings are not necessarily to scale. In addition, the number and size of the elements in the figures are merely illustrative and are not intended to limit the scope of the present disclosure.

Certain terms are used throughout the description and following claims to refer to particular components. Those skilled in the art will appreciate that electronic device manufacturers may refer to the same components by different names. This document does not intend to distinguish between components that differ in function but not name. In the following description and claims, the terms "including", "comprising" and "having" are used in an open-ended fashion, and thus should be interpreted to mean "including, but not limited to …".

It will be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or connected to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element or layer, there are no intervening elements or layers present therebetween.

Although terms such as "first," "second," "third," etc. may be used to describe or designate various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element in the specification, regardless of the order in which the elements are manufactured. In the claims, the terms "first," "second," "third," etc. may be used instead of, or in addition to, the terms in the claims, depending on the order in which the elements in the claims are recited. Accordingly, in the following description, a first member may be a second member in the claims.

It is to be understood that the following illustrative embodiments may be implemented by replacing, recombining, and mixing features of several different embodiments without departing from the spirit of the present disclosure.

The tiled display device of the present disclosure can be a curved display or a bendable display, wherein a bendable display refers to a display that can be bent, folded, stretched, flexed (flexible) or other similar deformation (hereinafter referred to as "bendable"). In other words, the display may have a curved surface or may be bent during operation.

The tiled display device of the present disclosure can be configured as follows: non-self-luminous Liquid Crystal Displays (LCDs), self-luminous Organic Light Emitting Diode displays (OLED displays), Inorganic Light Emitting Diode displays (LED displays), submillimeter Inorganic Light Emitting Diode displays (Mini-LED displays), Micro-Inorganic Light Emitting diodes (Micro-LED displays), Quantum-Dot LED displays (Quantum-Dot LED displays, QLED displays), or electrophoretic displays (Electro-optical displays, EPDs) …, but not limited thereto.

Please refer to fig. 1. Fig. 1 is a schematic top view of a tiled display apparatus 10 according to an embodiment of the present disclosure in a top view direction (direction Z). The tiled display device 10 can be applied in a variety of flexible electronic devices, such as but not limited to mobile phones, mobile personal computers, antennas, lighting, electronic books, and electronic paper and other electronic equipment. It should be understood that the tiled display apparatus 10 including two panels of the present disclosure is merely exemplary, and in practice, more panels may be combined to form the tiled display apparatus.

The tiled display apparatus 10 shown in FIG. 1 includes at least a first panel 12 and a second panel 14 tiled on one side of the first panel 12 along a stitching line AX. In other words, the first panel 12 and the second panel 14 are located on both sides of the splice line AX along the direction X (which may also be referred to as a splice direction). The stitching line AX may extend along a direction, for example along the direction Y. The first panel 12 includes an upper surface TS1 (display surface) and a lower surface BS1 opposite to the upper surface TS1, the upper surface TS1 includes a first display area AA1 and a second display area AA2, wherein the second display area AA2 is located between the first display area AA1 and the stitching line AX. The second panel 14 includes an upper surface TS2 (display surface) and a lower surface BS2 opposite to the upper surface TS2, the upper surface TS2 includes a third display area AA3 and a fourth display area AA4, wherein the fourth display area AA4 is located between the third display area AA3 and the splicing line AX. The first display area AA1, the second display area AA2, the third display area AA3 and the fourth display area AA4 may jointly form a screen-extended display area AA of the tiled display apparatus 10 when the first panel 12 and the second panel 14 are unfolded to be substantially located on the same horizontal plane (a plane formed by the direction X and the direction Y). The expansion display area AA may display a continuous image as a whole, or may display different images according to requirements, but is not limited thereto, depending on design requirements. For example, the first display area AA1 and the second display area AA2 of the first panel 12 can be used as a main display area, and the third display area AA3 and the fourth display area AA4 of the second panel 14 can be used as an auxiliary display area, so as to facilitate simultaneous reference of two images, but is not limited thereto. In some embodiments, the tiled display apparatus of the present disclosure can be formed by tiling two or more display panels, and each display area can be non-rectangular. For example, the extended display areas after tiling may be circular, while the display areas of each display panel may each be, for example, semi-circular.

In some embodiments, the first panel 12 may optionally include a peripheral region PR1 disposed at least one outside of the first display region AA1 and the second display region AA2, and the second panel 14 may optionally include a peripheral region PR2 disposed at least one outside of the third display region AA3 and the fourth display region AA 4. It should be noted that although the peripheral region PR1 is shown in fig. 1 to be located on the upper side, the lower side and the left outer side of the first display region AA1, the peripheral region PR1 of the first panel 12 may also be located on the side of the second display region AAA2 opposite to the first display region AA1, or between the second display region AA2 and the fourth display region AA4, but when the tiled display device 10 is unfolded, the peripheral region PR1 of the portion is less visible from the user side, for example, the peripheral region PR1 of the portion may be bent to the lower side or below the display region, or may be overlapped with the second display region AA2 of the portion. Similarly, although fig. 1 shows the peripheral region PR2 on the upper side, the lower side and the right outer side of the third display region AA3, in practice, the peripheral region PR2 of the second panel 14 may also be located on the side of the fourth display region AA4 opposite to the third display region AA3 or between the fourth display region AA3 and the second display region AA2, but when the tiled display device 10 is unfolded, the portion of the peripheral region PR2 is less visible from the user side, for example, the portion of the peripheral region PR2 may bend to the lower side or below the display region, or overlap with the portion of the fourth display region AA 4. Peripheral circuit elements 11 may be selectively disposed in the peripheral region PR1 and/or the peripheral region PR 2. The peripheral circuit elements 11 include, but are not limited to, a driving element, a resetting element, a compensating element, an initializing element, an operation control element, a light-emitting control element, a capacitor, an inductor, a power line, or a combination thereof, for controlling the operation of the display units of the first panel 12 and/or the second panel 14. In some embodiments, at least one Flexible Printed Circuit (FPC) (not shown) may be connected to the peripheral region PR1 and/or the peripheral region PR 2. By disposing the peripheral circuit elements on the flexible printed circuit board and bending the flexible printed circuit board toward the lower surface BS1 and/or the lower surface BS2 of the first panel 12 and/or the second panel 14, the area occupied by the peripheral circuit elements in the peripheral region PR1 and/or the peripheral region PR2 can be reduced, so as to reduce the overall area of the peripheral region PR1 and/or the peripheral region PR 2.

The present disclosure, as will be described in greater detail below, reduces the effects of dark regions near the stitching line AX. That is, when the tiled display apparatus 10 of the present disclosure is used in the front viewing angle direction (the direction Z shown in fig. 1), a dark area is less easily observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14, and the display quality is improved. In some embodiments of the present disclosure, when the tiled display device 10 is used in the front viewing angle direction, the peripheral region PR1 and/or the peripheral region PR2 disposed at the periphery of the first display region AA1 and/or the third display region AA3 are not easy to be observed, so as to achieve a display effect approaching "full screen" or "borderless". Compared with the situation that the user observes a dark area, a deformed picture or a color difference in the display area near the splicing line AX due to the peripheral area of the prior art tiled display device, the present disclosure can reduce the problem of the dark area or the color difference.

Please refer to fig. 2. Fig. 2 is a schematic cross-sectional view of a tiled display apparatus 10a according to an embodiment of the present disclosure in an unfolded state. The tiled display device 10a includes a first panel 12 and a second panel 14 located on both sides of a stitching line AX1 along a direction X (a stitching direction), and a protective layer 16 and a protective layer 18 are respectively disposed on the first panel 12 and the second panel 14, i.e., the protective layer 16 is disposed corresponding to the first panel 12, and the protective layer 18 is disposed corresponding to the second panel 14. The first panel 12 includes a light exit area 121, and a peripheral area PR1-1 and a peripheral area PR1-2 disposed on both sides of the light exit area 121. The second panel 14 includes a light exit region 141, and a peripheral region PR2-1 and a peripheral region PR2-2 disposed on both sides of the light exit region 141. The peripheral region PR1-1 of the first panel 12 and the peripheral region PR2-1 of the second panel 14 are disposed adjacent to each other on either side of the splice line AX 1. The top of fig. 2 is the top view, i.e., top surface TS1 of first panel 12 and top surface TS2 of second panel 14 are facing up, and bottom surfaces BS1 and BS2 are facing down. The horizontal plane HSP shown in fig. 2 represents a plane formed by the direction X and the direction Y. The position of the stitching line AX in the top view schematic diagram (refer to fig. 1) of the present embodiment is shown in fig. 2, which is substantially based on the connection line of the highest point in the cross-sectional schematic diagram. In this embodiment, the stitching line AX and the stitching line AX1 substantially overlap.

The first panel 12 and the second panel 14 may each comprise a multi-layer structure, for example, from the bottom surface BS1(BS2) to the top surface TS1(TS2) may in turn comprise, but are not limited to, a support layer, a flexible substrate, a display element layer, an encapsulation layer, and the like. For simplicity, the multi-layer structure of the first panel 12 and the second panel 14 is not shown. The material of the support layer may include copper (copper), iron (iron), aluminum (aluminum), etc., or an alloy of these elements, but is not limited thereto. The flexible substrate material may include any suitable flexible or bendable material, such as, but not limited to, a polymer material, such as Polyimide (PEN), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or a combination thereof. The flexible substrate can be attached to the supporting layer through an adhesion layer to maintain the structure and/or shape of the flexible substrate. The display element layer is disposed on the flexible substrate and may include a dielectric stack, a display unit, and a driving element. The dielectric stack may include organic materials, inorganic materials, or a combination thereof, but the disclosure is not limited thereto. The display unit may be any kind of display unit or element. In some embodiments, the display unit may include a light-emitting diode (LED), and the LED may be, for example, an organic light-emitting diode (OLED), a micro-LED, a sub-millimeter LED (mini LED), a quantum dot light-emitting diode (QLED), or a combination thereof, but is not limited thereto. Each display element can be roughly regarded as a sub-pixel. The driving element is arranged corresponding to each display unit and is used for controlling the light emission of each display unit. The driving device can be, for example, a top-gate thin film transistor (top-gate type TFT) or a bottom-gate thin film transistor (bottom-gate type TFT), but is not limited thereto. The light exit area 121 of the first panel 12 and the light exit area 141 of the second panel 14 substantially correspond to the range of the display element layer. The encapsulation layer is disposed on the display element layer, and is, for example, a thin film encapsulation layer (TFE) stacked by an organic-inorganic-organic layer combination. The packaging layer can prevent moisture or oxygen in the environment from influencing the display element layer, so as to improve the display quality. In some embodiments, the first panel 12 and/or the second panel 14 may further include a biometric recognition layer and/or a touch layer if they are sensing display panels. The touch layer may have a complete touch function itself or an auxiliary touch function. The touch layer can be directly disposed on the package layer, or disposed on another flexible substrate and then bonded to the package layer. In other embodiments, the touch layer may be integrated into the display device layer according to design requirements. The biometric identification layer may have a function of complete biometric identification itself or a function of assisting touch. The biometric identification layer can be directly disposed on the package layer, or disposed on another flexible substrate and then bonded to the package layer. In other embodiments, the biometric identification layer may be integrated into the display device layer according to design requirements. The biometric identification layer may be, for example, a fingerprint identification layer, or other suitable identification layer.

As shown in fig. 2, the portion of the first panel 12 proximate the splice line AX1 is folded about a first fold axis RX1 toward the lower surface BS1, and the portion of the second panel 14 proximate the splice line AX1 is folded about a second fold axis RX2 toward the lower surface BS 2. The first and second bending axes RX1, RX2 extend in the direction Y as well as the stitching line AX 1. The light exit area 121 of the first panel 12 may include a main light exit area 121-1 and an auxiliary light exit area 121-2, wherein the auxiliary light exit area 121-2 extends into the bent portion. The light exiting region 141 of the second panel 14 may include a main light exiting region 141-1 and an auxiliary light exiting region 141-2, and the auxiliary light exiting region 141-2 of the light exiting region 141 extends into the bent portion. When the tiled display device 10a is in the unfolded state, the first display area AA1 substantially corresponds to the main light-exiting area 121-1 of the first panel 12, the second display area AA2 substantially corresponds to the auxiliary light-exiting area 121-2 of the first panel 12, the third display area AA3 substantially corresponds to the main light-exiting area 141-1 of the second panel 14, and the fourth display area AA4 substantially corresponds to the auxiliary light-exiting area 141-2 of the second panel 14.

The first and

second panels

12, 14 may be spliced together in any suitable manner. For example, as shown in FIG. 2, the first hub device 22 may be disposed at the lower surface BS1 of the first panel 12, the second hub device 24 may be disposed at the lower surface BS2 of the second panel 14, and the first and

second hub devices

22 and 24 may be connected together by a connecting member (not shown) to splice the first and

second panels

12 and 14 and may be unfolded or folded with respect to each other. It should be understood that the above splicing manner is only an example and is not intended to limit the disclosure. In some embodiments, the first hub device 22 may be disposed at a position substantially overlapping the first bending axis RX1, and the second hub device 24 may be disposed at a position substantially overlapping the second bending axis RX2, but is not limited thereto.

The protective layers 16 and 18 may provide protection for the first and

second panels

12 and 14 and/or may be used to provide optical compensation for the display area. The material of the

protective layers

16 and 18 may include an inorganic material, an organic material, or a combination thereof, wherein the inorganic material may include glass, for example, and the organic material may include a polymer material such as polyimide (polyimide), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), or a combination thereof, but is not limited thereto.

The protective layer 16 may include a planar region 16a corresponding to the main light exiting region 121-1 of the first panel 12 and a curved region 16b corresponding to the auxiliary light exiting region 121-2 and extending from the curved start point P1 to the curved end point P2. The protective layer 18 may include a planar region 18a corresponding to the primary light exiting region 141-1 of the second panel 14 and a curved region 18b corresponding to the secondary light exiting region 141-2 and extending from the curved starting point P1 to the curved ending point P2. The starting point P1 of the curved surface is the boundary between the plane area and the curved surface area, and the ending point P2 of the curved surface is the outer edge of the curved surface area. The curved surface 16b and the curved surface 18b may have any curved connection from the curved surface starting point P1 to the curved surface ending point P2, such as, but not limited to, an arc with a fixed radius of curvature, an arc with a gradual radius of curvature.

When the tiled display device 10a is unfolded, i.e., when the main light-exiting region 121-1 and the main light-exiting region 141-1 are substantially located at the horizontal plane HSP (i.e., the main light-exiting region 121-1 and the main light-exiting region 141-1 are aligned with the horizontal plane HSP), the curved end point P2 of the curved region 16b and the curved end point P2 of the curved region 18b contact each other to form a recess 111-1, and the protective layer 16 and the protective layer 18 have a contact region CR. The top of the contact region CR substantially overlaps the curved surface end point P2, and the bottom of the contact region CR is at the same level as the lowest point of the auxiliary light-exiting region 121-2 and/or the auxiliary light-exiting region 141-2. The position and area of the touch region CR may vary with the structure or the unfolding and folding of the tiled display apparatus 10a, but the touch region CR is substantially located on the extension line of the tiled line AX1, and the touch region CR may be a line or a touch surface, but not limited thereto. The top of contact region CR may be below the upper surface TS1 of first panel 12 and/or the upper surface TS2 of second panel 14.

As shown in fig. 2, a projection of the upper surface TS1 of the first panel 12 to the lowest point of the auxiliary light-exiting region 121-2 (or to the bottom of the contact region CR) in the direction Z has a distance X1, a projection of the upper surface TS2 of the second panel 14 to the lowest point of the auxiliary light-exiting region 141-2 in the direction Z has a distance X2, a projection of the top of the contact region CR (i.e., the curved surface end point P2) to the lowest point of the auxiliary light-exiting region 121-2 and/or the auxiliary light-exiting region 141-2 (or to the bottom of the contact region CR) in the direction Z has a height H, the planar region 16a of the protective layer 16 has a thickness T1, and the planar region 18a of the protective layer 18 has a thickness T2. When the following formula is satisfied, the effect of reducing the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1 can be achieved, and the effect of the dark area observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14 by a user is reduced, so as to form a screen-extended display area AA together with the first display area AA1 and the third display area AA 3.

H/(Xn + Tn) < 0.8 (formula one)

In the first expression, the distance Xn and the thickness Tn represent any one of a set of the distance X1 and the thickness T1 between the first panel 12 and the corresponding passivation layer 16 and a set of the distance X2 and the thickness T2 between the second panel 14 and the corresponding passivation layer 18. The distance Xn can be adjusted according to product requirements. In some embodiments, the distance Xn may be greater than or equal to 0 and less than or equal to 200 μm. The first expression indicates that the height H is greater than or equal to 0 and less than 0.8 than the ratio of the thickness Tn to the sum of the distances Xn. In some embodiments, the distance X1 may be selectively equal to the distance X2, and the thickness T1 may be selectively equal to the thickness T2, but is not limited thereto.

With reference to fig. 2, the projection of the curved surface starting point P1 to the curved surface ending point P2 of the curved surface region 16b of the first panel 12 on the horizontal plane HSP has a distance L1, the projection of the curved surface starting point P1 to the curved surface ending point P2 of the curved surface region 18b of the second panel 14 on the horizontal plane HSP has a distance L2, the projection of the contact region CR to the auxiliary light emergent region 121-2 on the horizontal plane HSP has a width W1, the projection of the contact region CR to the auxiliary light emergent region 141-2 on the horizontal plane HSP has a width W2, the projection of the first panel 12 on the horizontal plane HSP has a width D1, and the projection of the second panel 14 on the horizontal plane HSP has a width D2. When the following formula two is satisfied, the effect of reducing the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1 can be achieved, and the effect of the dark area observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14 by a user is reduced, so as to form a screen expansion display area AA together with the first display area AA1 and the third display area AA 3.

Dn/2 ≧ Ln ≧ Wn (second expression)

In the second expression, the width Dn, the distance Ln, and the width Wn represent any one of a set of the width D1, the distance L1, and the width W1 of the first panel 12 and the correspondingly disposed protection layer 16, and a set of the width D2, the distance L2, and the width W2 of the second panel 14 and the correspondingly disposed protection layer 18. The second expression represents that the distance Ln is less than or equal to one-half of the distance Dn and greater than or equal to the width Wn. In some embodiments, distance L1 may be selectively equal to distance L2, width D1 may be selectively equal to width D2, and width W1 may be selectively equal to width W2. In other embodiments, the distance L1 may be different from the distance L2, the width D1 may be different from the width D2, and the width W1 may be different from the width W2, but not limited thereto. The display quality can be improved and the picture discontinuity feeling of the dark area at the splicing position observed by a user can be reduced as long as at least one of the first expression and the second expression is satisfied.

Please continue to refer to fig. 2. In some embodiments, the portion of the protective layer 16 corresponding to the peripheral region PR1-2 of the first panel 12 and the portion of the protective layer 18 corresponding to the peripheral region PR2-2 of the second panel 14 may include a curved region 16c and a curved region 18c, respectively, to provide optical compensation for the peripheral region PR1-2 and the peripheral region PR 2-2. The curved surface region 16c extends from a curved surface starting point P1 ' to a curved surface ending point P2 ', and has a projection on the horizontal plane HSP with a distance L1 '. The curved surface region 18c extends from a curved surface starting point P1 ' to a curved surface ending point P2 ', and has a projection on the horizontal plane HSP with a distance L2 '. The projection of the peripheral region PR1-2 on the horizontal plane HSP has a width B1 ', and the projection of the peripheral region PR2-2 on the horizontal plane HSP has a width B2'. The following formula three can be selected to achieve the effect of reducing the dark areas caused by the peripheral area PR1-2 and the peripheral area PR2-2, so that the extended display area AA can extend to approach the outer edges of the first panel 12 and the second panel 18, thereby achieving the display effect approaching "full screen" or "borderless".

Dn/2 ≧ Ln '≧ Bn' (III)

In the third expression, the width Dn, the width Bn 'and the distance Ln' represent any one of a set of the width D1, the width B1 'and the distance L1' of the first panel 12 and the correspondingly disposed protective layer 16 and a set of the width D2, the width B2 'and the distance L2' of the second panel 14 and the correspondingly disposed protective layer 18. The distance Ln 'is expressed by the formula as being less than or equal to one-half the distance Dn and greater than or equal to the width Bn'. In some embodiments, the width B1 'may be selectively equal to the width B2'. In other embodiments, the width B1 'may be different from the width B2', but is not limited thereto.

Please refer to fig. 3. Fig. 3 is a partial schematic side view of the tiled display apparatus 10a of the embodiment shown in fig. 2 in an unfolded state in the vicinity of the stitching line AX1, illustrating that light rays of the first panel 12 and the second panel 14 emanate from the display element layer (not shown) and display an image through the protective layer 16 and the protective layer 18. The lower portion of fig. 3 is a schematic top view of a portion of the pixel array of the first panel 12 and the second panel 14 corresponding to the main light-exiting region and the auxiliary light-exiting region in the upper portion of fig. 3. Note that the upper part of fig. 3 refers to the upper direction axis, and the lower part of fig. 3 refers to the lower direction axis.

The present disclosure may also reduce the rainbow effect and/or the display image deformation of the second display area AA2 and the fourth display area AA4 caused by the bending of the first panel 12 and the second panel 14 by means of pixel design, and reduce the picture discontinuity or the joint seam between the second display area AA2 and the fourth display area AA 4. Referring to the lower portion of FIG. 3, according to some embodiments of the present disclosure, the first panel 12 and the second panel 14 are, for example, color display panels capable of displaying a plurality of colors, and the display device layer thereof includes a pixel array formed by a plurality of pixels R1-Rn, pixels G1-Gn and pixels B1-Bn. The first panel 12 and the second panel 14 are, for example, display panels capable of displaying color gamut colors of red (R), green (G), or blue (B), the pixels R1 to Rn are, for example, capable of displaying red, the pixels G1 to Gn are, for example, capable of displaying green, and the pixels B1 to Bn are, for example, capable of displaying blue, but the present invention is not limited thereto. The pixels of the same color are arranged in a plurality of rows along the direction X, and the pixels of the rows of different colors alternate in the direction Y. Through the design, after the light rays of the pixels with different colors alternating along the direction Y in the auxiliary light-emitting area are refracted through the curved surface area of the protective layer, the pixels can be stretched at an equal magnification, and therefore the rainbow ripple phenomenon can be reduced. The pixel arrangement in this embodiment is merely an example, and the pixels can be arranged in other ways, such as the pixels R1-Rn, G1-Gn, and B1-Bn can be arranged in a staggered manner without alignment.

In addition, the present disclosure may further design the width of the pixel of the auxiliary light emitting area along the direction X according to the curvature of the auxiliary light emitting area of the display panel and/or the curvature of the curved surface area of the protective layer. As shown in fig. 3, the pixels of the same color (e.g., pixels R1-R5) of the auxiliary light exit area 121-2 of the first panel 12 have different widths and/or lengths. In one embodiment, the pixels R1 to R5 of the curved light exiting region 121-2 of the first panel 12 may have gradually decreasing widths and/or lengths to compensate for the stretching of the image due to refraction of the passivation layer of the pixels R1 to R5 of the auxiliary light exiting region 121-2, thereby improving the distortion of the displayed image. Likewise, the pixels R1 through R5 of the auxiliary light emergent region 141-2 of the second panel 14 may also have different widths and/or lengths. In one embodiment, the pixels R1-R5 of the curved light-exiting region 141-2 of the second panel 14 may have gradually decreasing widths and/or lengths. It should be understood that the number and size of the pixels shown in the drawings are exemplary for illustrative purposes and are not intended to limit the scope of the present disclosure, and the present disclosure may be implemented in a practical manner according to the display requirements. The first panel 12 and the second panel 14 are not limited to displaying the RGB color gamut and may include other color pixels in other embodiments. The width of the pixel is measured substantially perpendicular to the bending axis and the length of the pixel is measured substantially parallel to the bending axis.

It should be understood that in some embodiments, the pixels corresponding to the curved surface region 16c and the curved surface region 18c outside the protective layer 16 and the protective layer 18 may also be arranged to improve the displayed image in this region. For simplicity of description, further description is omitted here.

Please refer to fig. 4. FIG. 4 is a cross-sectional view of a tiled display apparatus 10b in an unfolded state according to an embodiment of the present disclosure. Unlike the previous embodiments shown in fig. 2 and 3, the first panel 12 and the second panel 14 of the tiled display apparatus 10b of fig. 4 are substantially planar display panels with light exiting areas that are not bent. The light exiting regions 121 of the first panel 12 are all the main light exiting regions 121-1, and the light exiting regions 141 of the second panel 14 are all the main light exiting regions 141-1. The peripheral region PR1-1 of the first panel 12 and the peripheral region PR2-1 of the second panel 14 are adjacently disposed on both sides of the stitching line AX1 and are located on the same horizontal plane as the main light exit area 121-1 and the main light exit area 141-1.

The first panel 12 and the second panel 14 may be spliced together in any suitable manner. For example, as shown in fig. 4, a first support layer 102 may be disposed on the lower surface BS1 of the first panel 12, a second support layer 104 may be disposed on the lower surface BS2 of the second panel 14, and then a connector (not shown) may be used to connect the first panel 12 and the second panel 14 to a common hub 26, so that the first panel 12 and the second panel 14 can be unfolded or folded relative to each other along the rotation axis RX 3. The above splicing method is only an example and is not intended to limit the disclosure.

The passivation layer 16 may include a planar region 16a corresponding to the main light exiting region 121-1 of the first panel 12 and a curved region 16b corresponding to the peripheral region PR1-1 of the first panel 12 and extending from the curved starting point P1 to the curved ending point P2. Similarly, the passivation layer 18 may include a planar region 18a corresponding to the main light-emitting region 141-1 of the second panel 14 and a curved region 18b corresponding to the peripheral region PR2-1 of the second panel 14 and extending from the curved starting point P1 to the curved ending point P2. The curved surface 16b and the curved surface 18b may have any curved connection from the curved surface starting point P1 to the curved surface ending point P2, such as, but not limited to, an arc with a fixed radius of curvature, an arc with a gradual radius of curvature. When the tiled display device 10b is unfolded, i.e., when the main light-exiting region 121-1 and the main light-exiting region 141-1 are substantially located at the horizontal plane HSP (i.e., the main light-exiting region 121-1 and the main light-exiting region 141-1 are aligned with the horizontal plane HSP), the curved end point P2 of the curved region 16b and the curved end point P2 of the curved region 18b contact each other to form a recess 111-1, and a contact region CR is formed between the passivation layer 16 and the passivation layer 18. The top of the contact region CR substantially overlaps the curved surface endpoint P2, and the bottom of the contact region CR is at the same level as the top surface TS1 of the first panel 12 and/or the top surface TS2 of the second panel 14. The position and area of the touch region CR may vary with the structure or the unfolding and folding of the tiled display apparatus 10b, but the touch region CR is substantially located on the extension line of the tiled line AX1, and the touch region CR may be a line or a touch surface, but not limited thereto.

Please continue to refer to fig. 4. The projection in direction Z of upper surface TS1 of first panel 12 to the bottom of contact area CR has a distance X1, the projection in direction Z of upper surface TS2 of second panel 14 to the bottom of contact area CR has a distance X2, the projection in direction Z of the top of contact area CR (i.e., curved surface end point P2) to upper surface TS1 of first panel 12 and/or upper surface TS2 of second panel 14 (or the top of contact area CR to the bottom of contact area CR) has a height H, planar area 16a of protective layer 16 has a thickness T1, and planar area 18a of protective layer 18 has a thickness T2. When the following formula is satisfied, the effect of improving the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1 can be achieved, and the effect of the dark area observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14 by a user is reduced, so as to form a screen-extended display area AA together with the first display area AA1 and the third display area AA 3.

H/(Xn + Tn) < 0.8 (formula one)

In the first expression, the distance Xn and the thickness Tn represent any one of a set of the distance X1 and the thickness T1 between the first panel 12 and the corresponding passivation layer 16 and a set of the distance X2 and the thickness T2 between the second panel 14 and the corresponding passivation layer 18. The distance Xn can be adjusted according to product requirements. In some embodiments, the distance Xn may be greater than or equal to 0 and less than or equal to 200 μm. In the embodiment of fig. 4, the distance Xn is substantially equal to 0. The first expression indicates that the height H is greater than or equal to 0 and less than 0.8 than the ratio of the thickness Tn to the sum of the distances Xn. In some embodiments, distance X1 may be substantially equal to distance X2 and thickness T1 may be substantially equal to thickness T2, but is not limited thereto.

Please continue to refer to fig. 4. The projection of the curved surface starting point P1 of the curved surface region 16B of the protective layer 16 of the first panel 12 to the curved surface end point P2 on the horizontal plane HSP has a distance L1, the projection of the curved surface starting point P1 of the curved surface region 18B of the protective layer 18 of the second panel 14 to the curved surface end point P2 on the horizontal plane HSP has a distance L2, the projection of the peripheral region PR1-1 of the first panel 12 on the horizontal plane HSP has a width B1, the projection of the peripheral region PR2-1 of the second panel 14 on the horizontal plane HSP has a width B2, the projection of the first panel 12 on the horizontal plane HSP has a width D1, and the projection of the second panel 14 on the horizontal plane HSP has a width D2. When the following formula four is satisfied, the effect of improving the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1 can be achieved, and the influence of the dark area observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14 by a user is reduced, so as to form a screen-extended display area AA together with the first display area AA1 and the third display area AA 3.

Dn/2 ≧ Ln ≧ Bn (formula IV)

In the fourth expression, the width Dn, the width Bn and the distance Ln represent any one of a set of the width D1, the width B1 and the distance L1 of the first panel 12 and the correspondingly disposed protective layer 16 and a set of the width D2, the width B2 and the distance L2 of the second panel 14 and the correspondingly disposed protective layer 18. The fourth expression represents that the distance Ln is less than or equal to one-half the distance Dn and greater than or equal to the width Bn. In some embodiments, distance L1 may be selectively equal to distance L2, width D1 may be selectively equal to width D2, and width B1 may be selectively equal to width B2. In some embodiments, the distance L1 may be different from the distance L2, the width D1 may be different from the width D2, and the width B1 may be different from the width B2, but is not limited thereto. The display quality can be improved and the picture discontinuity feeling of the dark area at the splicing position observed by a user can be reduced as long as at least one of the first expression and the second expression is satisfied.

The portion of the protective layer 16 corresponding to the peripheral region PR1-2 of the first panel 12 and the portion of the protective layer 18 corresponding to the peripheral region PR2-2 of the second panel 14 of the tiled display apparatus 10b of fig. 4 may include a curved region 16c and a curved region 18c, respectively, to provide optical compensation for the peripheral region PR1-2 and the peripheral region PR2-2, respectively. The curved surface region 16c extends from a curved surface starting point P1 ' to a curved surface ending point P2 ', and has a projection on the horizontal plane HSP with a distance L1 '. The curved surface region 18c extends from a curved surface starting point P1 ' to a curved surface ending point P2 ', and has a projection on the horizontal plane HSP with a distance L2 '. The projection of the peripheral region PR1-2 on the horizontal plane HSP has a width B1 ', and the projection of the peripheral region PR2-2 on the horizontal plane HSP has a width B2'. When it is desired to improve the display effect of the peripheral region, the following formula three can be selected to improve the dark region caused by the peripheral region PR1-2 and the peripheral region PR2-2, so that the screen expansion display area AA can extend to approach the outer edges of the first panel 12 and the second panel 18, thereby achieving the display effect approaching "full screen" or "no frame".

Dn/2 ≧ Ln '≧ Bn' (III)

In the third expression, the width Dn, the width Bn 'and the distance Ln' represent any one of a set of the width D1, the width B1 'and the distance L1' of the first panel 12 and the correspondingly disposed protective layer 16 and a set of the width D2, the width B2 'and the distance L2' of the second panel 14 and the correspondingly disposed protective layer 18. The distance Ln 'is expressed by the formula as being less than or equal to one-half the distance Dn and greater than or equal to the width Bn'. In some embodiments, the width B1 'may be selectively equal to the width B2'. In some embodiments, the width B1 'may optionally be unequal to the width B2', but is not limited thereto.

Referring to FIG. 5, the upper portion of FIG. 5 is a partial cross-sectional view of the area near the splicing line AX1 of the tiled display apparatus 10b of the embodiment shown in FIG. 4 in an unfolded state, illustrating that the light of the first panel 12 and the second panel 14 is emitted from the display element layer (not shown) and an image is displayed through the protective layer 16 and the protective layer 18. The lower portion of fig. 5 is a schematic plan view of the pixel array of the first panel 12 and the second panel 14 corresponding to the main light exiting area in the upper portion of fig. 5. Note that the upper part of fig. 5 refers to the upper direction axis, and the lower part of fig. 5 refers to the lower direction axis.

The tiled display device 10b can also reduce the rainbow effect and/or the distortion of the displayed image caused by the light passing through the curved surface area 16b of the protective layer 16 and the curved surface area 18b of the protective layer 18 by means of the pixel design, and reduce the discontinuous feeling of the image or the stitching seam feeling between the second display area AA2 and the fourth display area AA 4. Referring to the lower portion of FIG. 5, the pixel array of the first panel 12 adjacent to the peripheral region PR1-1 and the second panel 14 adjacent to the peripheral region PR2-1 are illustrated. The pixels R1-Rn may display red, the pixels G1-Gn may display green, and the pixels B1-Bn may display blue, but are not limited thereto. The pixels of the same color are arranged in a plurality of rows along the direction X, and the pixels of the rows of different colors alternate in the direction Y. Through the design, the pixels with different colors, which are mainly adjacent to the curved surface area and alternate along the direction Y, of the light emergent area can be stretched at the same magnification after being refracted by the curved surface area of the protective layer, so that the rainbow texture phenomenon can be reduced. The pixel arrangement shown in FIG. 5 is merely an example, and the pixels can be arranged in other ways, such as the pixels R1-Rn, G1-Gn, and B1-Bn can be arranged in different offset positions without alignment.

In some embodiments, the width of the pixels adjacent to the peripheral region along the direction X may also be designed according to the curvature of the curved surface region 16b of the protection layer 16 and the curved surface region 18b of the protection layer 18, so as to compensate the stretching of the picture due to the refraction of the protection layer and improve the deformation of the displayed image. For example, as shown in the lower portion of fig. 5, the same color pixels of the first panel 12 and the second panel 14, such as pixels R1-R5, have different widths and/or lengths. In one embodiment, the pixels R1-R5 of the first panel 12 and the second panel 14 may have progressively larger widths and/or lengths. It should be understood that the above width variations of the pixels R1-R5 shown in fig. 5 are only examples, and the actual applications should be designed according to the display requirements. The pixel width is measured substantially in the direction of the vertical axis of rotation and the pixel length is measured substantially in the direction of the parallel axis of rotation.

Referring to fig. 6, fig. 6 is a schematic cross-sectional view of the tiled display apparatus 10b shown in fig. 4 in a partially folded state, for example, by folding the lower surface BS1 of the first panel 12 toward the lower surface BS2 opposite to the second panel 14. Some elements or layers (e.g., electrodes, active layers of Thin Film Transistors (TFTs), and signal lines) in the folding region of the conventional foldable tiled display device may be damaged due to stress generated when the display device is bent or flexed, thereby affecting the light emitting quality and performance of the TFTs. The folding manner shown in fig. 6 of the present disclosure is to relatively unfold or fold the first panel 12 and the second panel 14 along the rotation axis RX3, so as to reduce the chance of generating defects due to repeated bending or flexing of the first panel and/or the second panel itself, and thus improve the stability and reliability of the foldable tiled display device. In other embodiments, the first panel and the second panel may have different dimensions. It should be appreciated that in other embodiments, the top surface TS1 of the first panel 12 can be folded toward the top surface TS2 of the second panel 14 by using a connector design (not shown).

Please refer to fig. 7. FIG. 7 is a cross-sectional view of a tiled display apparatus 10c in an unfolded state according to an embodiment of the present disclosure. The tiled display device 10c includes a first panel 12 and a second panel 14 on either side of a stitching line AX2, a protective layer 16 disposed on the first panel 12, and a protective layer 18 disposed on the second panel 14, i.e., a majority of the protective layer 16 is disposed in correspondence with the first panel 12, and the protective layer 18 is disposed in correspondence with the second panel 14. The position of the stitching line AX in the top view schematic diagram (refer to fig. 1) of the present embodiment is shown in fig. 7, which is substantially based on the connection line of the highest point in the cross-sectional schematic diagram. The stitching line AX may not be aligned with the stitching line AX2 in the Z-direction. Unlike the previous embodiments shown in fig. 4 to 6, the curved region 16b of the passivation layer 16 of fig. 7 extends toward the second panel 14 and is disposed on at least a portion of the peripheral region PR2-1 of the second panel 14 to simultaneously provide optical compensation for the peripheral region PR1-2 of the first panel 12 and the peripheral region PR2-2 of the second panel 14.

As shown in fig. 7, the protective layer 16 disposed on one panel 12 includes a planar region 16a corresponding to the main light exiting region 121-1 of the first panel 12, and a curved region 16b corresponding to the peripheral region PR1-1 of the first panel 12 and the peripheral region PR2-1 of the second panel 14 and extending from the curved start point P1 to the curved end point P2. The protection layer 18 is correspondingly disposed on the second panel 14 and includes a planar region 18a and a curved region 18b extending from the curved start point P1 to the curved end point P2, both of which correspond to the main light-emitting region 141-1 of the second panel 14. The curved surface 16b and the curved surface 18b may have any curved connection from the curved surface starting point P1 to the curved surface ending point P2, such as, but not limited to, an arc with a fixed radius of curvature, an arc with a gradual radius of curvature. When the tiled display device 10c is unfolded, i.e., when the main light-exiting region 121-1 and the main light-exiting region 141-1 are substantially located at the horizontal plane HSP (i.e., the main light-exiting region 121-1 and the main light-exiting region 141-1 are aligned with the horizontal plane HSP), the curved end point P2 of the curved region 16b and the curved end point P2 of the curved region 18b contact each other to form a recess 111-1, and a contact region CR is formed between the passivation layer 16 and the passivation layer 18. The top of the contact region CR substantially overlaps the curved surface endpoint P2, and the bottom of the contact region CR is at the same level as the top surface TS1 of the first panel 12 and/or the top surface TS2 of the second panel 14. The position and area of the contact region CR may vary with the structure or the unfolding and folding of the tiled display apparatus 10c, but the contact region CR is substantially parallel to the extension line of the tiled line AX2, i.e. parallel to the direction Y, and the contact region CR may be a line or a contact surface, but not limited thereto. As shown in FIG. 7, when tiled display apparatus 10c is unfolded, the projection of protective layer 16 on horizontal plane HSP has a length LL1, and the projection of protective layer 18 on horizontal plane HSP has a length LL 2. In some embodiments, the length LL1 of protective layer 16 is greater than the length LL2 of protective layer 18.

Please continue to refer to fig. 7. The projection of the upper surface TS1 of the first panel 12 to the lowest point (in this embodiment, the lower surface BS1 of the first panel 12) in the direction Z has a distance X1, the projection of the upper surface TS2 of the second panel 14 to the lowest point (in this embodiment, the lower surface BS2 of the second panel 14) in the direction Z has a distance X2, the projection of the top of the touch region CR (i.e., the curved surface end point P2) to the lower surface BS1 of the first panel 12 and/or the lower surface BS2 of the second panel 14 in the direction Z has a height H, the projection of the curved surface starting point P1 to the curved surface end point P2 of the curved surface region 16B of the protective layer 16 on the horizontal plane HSP has a distance L1, the projection of the curved surface starting point P1 to the curved surface end point P2 of the curved surface region 18B of the protective layer 18 on the horizontal plane HSP has a distance L2, the projection of the peripheral region PR1-1 on the horizontal plane has a width B1, the projection of the PR 2-HSP 1 on the horizontal plane has a width B2, planar area 16a of protective layer 16 has a thickness T1, planar area 18a of protective layer 18 has a thickness T2, the projection of first panel 12 on horizontal plane HSP has a width D1, and the projection of second panel 14 on horizontal plane HSP has a width D2. When it is desired to improve the peripheral area display effect, the following formula five may be selected to achieve the effect of improving the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1, so as to reduce the effect of the dark area observed by the user between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14, and form a screen expansion display area AA together with the first display area AA1 and the third display area AA 3.

(1/2) D1 ≧ L1 ≧ B1+ B2 (formula V)

Equation five represents distance L1 being less than or equal to one-half distance D1 and greater than or equal to the sum of width B1 and width B2. In some embodiments, the width D1 may be selectively equal to the width D2, and the width B1 may be selectively equal to the width B2. In some embodiments, the width D1 may be optionally unequal to the width D2, and the width B1 may be optionally unequal to the width B2, but is not limited thereto.

Referring to fig. 8, fig. 8 is a schematic cross-sectional view of the tiled display apparatus 10c shown in fig. 7 in a partially folded state, for example, the lower surface BS1 of the first panel 12 is folded toward the lower surface BS2 opposite to the second panel 14. When the tiled display device 10c is folded, the peripheral region PR2-1 of the second panel 14 is exposed from the curved region 16b of the protection layer 16.

Please refer to fig. 9. Fig. 9 is a schematic cross-sectional view of a tiled display apparatus 10d in an unfolded state according to an embodiment of the present disclosure. The tiled display device 10d includes a first panel 12 and a second panel 14 located on both sides of a stitching line AX3, and a protective layer 16 and a protective layer 18 disposed on the first panel 12 and the second panel 14, respectively, i.e., most of the protective layer 16 is disposed corresponding to the first panel 12, and the protective layer 18 is disposed corresponding to the second panel 14. The position of the stitching line AX in the top view schematic diagram (refer to fig. 1) of the present embodiment is shown in fig. 9, which is substantially based on the connection line of the highest point in the cross-sectional schematic diagram. The stitching line AX may not be aligned with the stitching line AX3 in the Z-direction. In contrast to the previous embodiment shown in fig. 7, the length L2 of the projection of the curved surface region 18b of the protective layer 18 of fig. 9 on the horizontal plane HSP is close to or equal to 0, i.e. the starting point P1 of the curved surface region 18b is located substantially directly above the ending point P2 of the curved surface. In this embodiment, the curved region 16b of the protection layer 16 of the first panel 12 extends toward the second panel 14 and is disposed on at least a portion of the peripheral region PR2-1 of the second panel 14, so as to provide optical compensation to the peripheral region PR1-2 of the first panel 12 and the peripheral region PR2-2 of the second panel 14 at the same time, and reduce the influence of the dark region between the second display region AA2 of the first panel 12 and the fourth display region AA4 of the second panel 14 observed by the user.

Please refer to fig. 10. Fig. 10 is a schematic cross-sectional view of a tiled display apparatus 10e according to an embodiment of the present disclosure in an unfolded state. The tiled display arrangement 10e of fig. 10 is similar to the tiled display arrangement 10b of fig. 4, including first and second generally

planar panels

12, 14 and

protective layers

16, 18 disposed on the first and

second panels

12, 14, respectively. A contact region CR is included between the protective layer 16 and the protective layer 18.

The main difference between fig. 10 and fig. 4 is that the projection width D3 of the passivation layer 16 of the tiled display device 10e of fig. 10 on the horizontal plane HSP is greater than the projection width D1 of the first panel 12 on the horizontal plane HSP, and the projection width D4 of the passivation layer 18 on the horizontal plane HSP is greater than the projection width D2 of the second panel 14 on the horizontal plane HSP, so that the passivation layer 16 protrudes from the edge of the first panel 12, and the passivation layer 18 protrudes from the edge of the second panel 14.

In detail, the main difference between fig. 10 and fig. 4 is that the curved region 16b of the protection layer 16 protrudes beyond the edge of the peripheral region PR1-1 of the first panel 12, and the edge of the curved region 18b of the protection layer 18 protrudes beyond the edge of the peripheral region PR2-1 of the second panel 14. Therefore, when the tiled display device 10e is in the unfolded state, the passivation layers 16 and 18 contact each other at the contact region CR, but the peripheral region PR1-1 of the first panel 12 and the peripheral region PR2-1 of the second panel 14 do not contact each other, and a gap 111-2 is formed therebetween. The slit 111-2 is disposed opposite the depression 111-1 between the curved surface section 16b and the curved surface section 18 b.

Please continue to refer to fig. 10. When the following sixth formula is satisfied, the effect of improving the dark area caused by the peripheral area PR1-1 and the peripheral area PR2-1 can be achieved, and the influence of the dark area observed between the second display area AA2 of the first panel 12 and the fourth display area AA4 of the second panel 14 by a user is reduced, so as to form a screen-extended display area AA together with the first display area AA1 and the third display area AA 3.

Dn/2 ≧ Ln > Bn (six formula)

In the sixth expression, the width Dn, the width Bn, and the distance Ln denote any one of the width D1, the width B1, and the distance L1 of the projection of the set of the first panel 12 and the correspondingly disposed protective layer 16 on the horizontal plane HSP, and the width D2, the width B2, and the distance L2 of the projection of the set of the second panel 14 and the correspondingly disposed protective layer 18 on the horizontal plane HSP.

Further, the present disclosure may optimize the curve from the curved starting point P1 to the curved ending point P2 of the

curved surface regions

16b and 18b, so as to reduce the discontinuous feeling of the image or the seam feeling of the tiled display device 10e, and/or reduce the image stretching caused by the refraction of the protection layer, thereby improving the deformation of the displayed image. In some embodiments, the curve between the curve starting point P1 and the curve ending point P2 of the curved surface region 16b and the curved surface region 18b may be designed as an arc curve CV, which may be, for example, an elliptic curve, but not limited thereto.

Fig. 10 illustrates the protection layer 16 as an example. In fig. 10, the midpoint I is a middle point of a sectional line passing through the curved surface starting point P1 and the curved surface ending point P2 of the curved surface region 16b, and the intersection point K is an intersection point of a tangential line TL1 passing through the curved surface starting point P1 and a tangential line TL2 passing through the curved surface ending point P2. The intersection point J is the intersection point of the line joining the midpoint I and the intersection point K and the arc curve CV of the curved surface region 16 b. Midpoint I includes a distance K1 from intersection point J, and midpoint I includes a distance K2 from intersection point J.

In some embodiments, the planar region 16a of the passivation layer 16 may be located on the tangent line TL1, and the contact region CR may be located on the tangent line TL 2.

When the following formula seven is satisfied, the display quality can be further improved, and the sense of discontinuity of the picture of the dark area observed by the user at the spliced part is reduced.

0 ≦ J1/K1 ≦ 1 (formula seven)

In one embodiment, the J1/K1 may be between 0.2 and 0.6, or the J1/K1 approaches 0.4, or when the curve from the curve starting point P1 to the curve ending point P2 is similar to an elliptic curve, a better effect of improving the display quality can be obtained.

To sum up, this disclosure can reduce the influence that the dark space between two panels of user observation spliced through the design of protective layer, reaches the purpose that promotes display quality. In addition, the design of the pixels can be selectively used, and the problems of rainbow texture phenomenon near the splicing area and/or deformation of the display image are solved.

The above description is only an example of the present disclosure, and is not intended to limit the present disclosure, and it is apparent to those skilled in the art that various modifications and variations can be made in the present disclosure. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A tiled display apparatus, comprising:

two panels; and

two passivation layers respectively disposed on the two panels, wherein the two passivation layers have a contact area, a height H is between a top and a bottom of the contact area, one of the two passivation layers has a thickness Tn, a distance Xn is between an upper surface of one of the two panels and the bottom of the contact area, the one of the two panels corresponds to the one of the two passivation layers, and the height H, the thickness Tn and the distance Xn satisfy the following relations:

0≦H/(Xn+Tn)＜0.8。

2. the tiled display arrangement of claim 1, wherein:

the two panels respectively comprise a light emergent area and a peripheral area, and the peripheral areas of the two panels are adjacently arranged; and

the two protective layers respectively comprise a plane area and a curved area, and the curved areas of the two protective layers are mutually contacted at the contact area.

3. The tiled display apparatus of claim 2 wherein the light exiting areas of the two panels respectively include a primary light exiting area and a secondary light exiting area, and the curved areas of the two protective layers correspond to the secondary light exiting areas of the two panels.

4. The tiled display apparatus of claim 3 wherein one of the two panels comprises a width Dn, the curved region of one of the two passivation layers comprises a width Ln, a peripheral region of the one of the two panels comprises a width Bn, the one of the two panels corresponds to the one of the two passivation layers, wherein the width Dn, the width Ln and the width Bn satisfy the following relations:

Dn/2≧Ln≧Bn。

5. a tiled display apparatus, comprising:

one of the two panels comprises a plurality of pixels, wherein the pixels have the same color and are arranged along a first direction; and

two protective layers respectively arranged on the two panels, wherein the two protective layers have a contact region extending along a second direction, and the first direction is perpendicular to the second direction.

6. A tiled display arrangement according to claim 5 wherein the plurality of pixels adjacent to the contact area have different widths in the first direction.

7. The tiled display arrangement of claim 5, wherein:

8. The tiled display apparatus of claim 7 wherein the light exiting regions of the two panels respectively include a main light exiting region and an auxiliary light exiting region, the auxiliary light exiting regions of the two panels corresponding to the curved regions of the two protective layers.

9. A tiled display apparatus, comprising:

a first panel and a second panel; and

a first passivation layer disposed on the first panel and a second passivation layer disposed on the second panel,

the first protective layer and the second protective layer have a contact region, and the length of the first protective layer is greater than that of the second protective layer.

10. The tiled display apparatus of claim 9 wherein the first panel includes a width D1, a perimeter region of the first panel includes a width B1, a perimeter region of the second panel includes a width B2, a curved region of the first protective layer includes a width L1, wherein the width D1, the width B1, the width B2, and the width L1 satisfy the following relationships:

(1/2)D1≧L1≧B1+B2。