CN113450658B

CN113450658B - Display device

Info

Publication number: CN113450658B
Application number: CN202110750118.6A
Authority: CN
Inventors: 张昱仑; 陈冠勋
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2020-07-08
Filing date: 2021-07-02
Publication date: 2023-03-10
Anticipated expiration: 2041-07-02
Also published as: CN113450658A

Abstract

A display device comprises a first substrate, a plurality of pixel structures, a second substrate, a display medium and a side sealant. The plurality of pixel structures are arranged on the first substrate. The second substrate is arranged opposite to the first substrate. The display medium is arranged between the first substrate and the second substrate. The side sealant includes a first portion disposed on a sidewall of the first substrate, a second portion disposed on a sidewall of the second substrate, and a third portion disposed between the first portion and the second portion. The third portion has a plane facing away from the sidewall of the first substrate and the sidewall of the second substrate. The thickness of the first portion in the first direction decreases with distance from the third portion. The thickness of the second portion in the first direction decreases with distance from the third portion. The first direction is substantially perpendicular to the sidewalls of the first substrate.

Description

Display device

Technical Field

The present invention relates to a display device.

Background

With the development of display technologies, the demand for display devices is no longer satisfied with optical characteristics such as high resolution, high contrast, and wide viewing angle, and it is expected that display devices have an elegant appearance. For example, it is desirable that the bezel of the display device be narrow.

Generally, a display device includes a pixel array substrate, an opposite substrate, and a sealant for connecting the pixel array substrate and the opposite substrate. However, the frame sealant coating machine is limited in its capabilities, such as: the line width of the coated frame glue and the position precision of the coated frame glue can not be further reduced.

Disclosure of Invention

The invention provides a display device which is provided with an ultra-narrow frame.

The display device comprises a first substrate, a plurality of pixel structures, a second substrate, a display medium and side sealing glue. The plurality of pixel structures are arranged on the first substrate. The second substrate is disposed opposite to the first substrate. The display medium is arranged between the first substrate and the second substrate. The side sealant includes a first portion disposed on a sidewall of the first substrate, a second portion disposed on a sidewall of the second substrate, and a third portion disposed between the first portion and the second portion. The third portion has a plane facing away from the sidewall of the first substrate and the sidewall of the second substrate. The thickness of the first portion in the first direction decreases with distance from the third portion. The thickness of the second portion in the first direction decreases with distance from the third portion. The first direction is substantially perpendicular to the sidewalls of the first substrate.

Drawings

Fig. 1A to fig. 1F are schematic cross-sectional views illustrating a manufacturing process of a display device 10 according to an embodiment of the invention.

Fig. 2 is a schematic top view of a display panel DP according to an embodiment of the invention.

Fig. 3 is a schematic top view of a display device 10 according to an embodiment of the invention.

Fig. 4 is a schematic cross-sectional view of a display device 10A according to an embodiment of the invention.

Fig. 5 is a schematic cross-sectional view of a display device 10B according to an embodiment of the invention.

Fig. 6 is a schematic top view of a display device 10B according to an embodiment of the invention.

Fig. 7 is a schematic top view of a display device 10C according to an embodiment of the invention.

Fig. 8 is a schematic top view of a display device 10D according to an embodiment of the invention.

Fig. 9 is a schematic top view of a display device 10E according to an embodiment of the invention.

Description of reference numerals:

1: pixel array substrate

1a, 2a: display area

1b, 2b: peripheral zone

1b-1: bonding side

1b-2, 1b-3, 1b-4, 2b-2, 2b-3, 2b-4: non-joining side 2: opposite substrate

3: display medium

4: frame glue

4-1, 4-2, 4-3, 4-4: part of frame glue

4-1a: endpoint

5: side edge sealing glue

5-1: the first part

5-2: the second part

5-3 third section

5-3a: plane surface

5-4: fourth part

6: water-proof layer

6a: surface of

7: driving element

8: retaining wall structure

10. 10A, 10B, 10C, 10D: display device

110: a first substrate

110s, 210s, DLas, GLAs: side wall

110s-3, 110s-4, 210s-3, 210s-4: first subsidiary side wall

110s-2, 210s-2: second subsidiary side wall

110e-3, 110e-4: first edge

110e-2: second edge

210: second substrate

DL: data line

DLa: one end of the

DP: display panel

d1: a first direction

d2: the second direction

d3: third direction

d4: fourth direction

GL: gate line

GLa: one end of

gl: adapter cable

P: tool with a locking device

PE: pixel electrode

SPX: pixel structure

T1, T2: thickness of

W: width of

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Further, "electrically connected" or "coupled" may mean that there are additional elements between the elements.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable range of deviation of the specified value as determined by one of ordinary skill in the art, taking into account the measurement in question and the specified amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%. Further, as used herein, "about", "approximately" or "substantially" may be selected based on optical properties, etch properties, or other properties, with a more acceptable range of deviation or standard deviation, and not all properties may be applied with one standard deviation.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Fig. 2 is a schematic top view of a display panel DP according to an embodiment of the invention. Fig. 2 omits illustration of the display medium 3.

Fig. 3 is a schematic top view of a display device 10 according to an embodiment of the invention. Fig. 3 omits illustration of the display medium 3 and the waterproof layer 6.

Referring to fig. 1A and fig. 2, first, a display panel (display panel) DP is provided. The display panel DP includes a pixel array substrate 1, an opposite substrate 2 and a display medium 3. The pixel array substrate 1 includes a first substrate 110 and a plurality of pixel structures SPX disposed on the first substrate 110. The opposite substrate 2 includes a second base 210. The second substrate 210 is disposed opposite to the first substrate 110. The display medium 3 is disposed between the first substrate 110 and the second substrate 210.

Specifically, in this embodiment, the display panel DP further includes a sealant 4; the pixel array substrate 1 is provided with a display area 1a and a peripheral area 1b at the periphery of the display area 1a, and a plurality of pixel structures SPX are positioned in the display area 1a of the pixel array substrate 1; the opposite substrate 2 has a display area 2a and a peripheral area 2b, which are respectively overlapped with the display area 1a and the peripheral area 1b of the pixel array substrate 1; the sealant 4 is disposed between the peripheral region 1b of the pixel array substrate 1 and the peripheral region 2b of the opposite substrate 2, and the display medium 3 is disposed in a space surrounded by the pixel array substrate 1, the opposite substrate 2 and the sealant 4.

In the present embodiment, each pixel structure SPX may include an active device (e.g., a thin film transistor; not shown) and a pixel electrode PE electrically connected to the active device. In the present embodiment, the pixel array substrate 1 further includes a plurality of data lines DL (shown in fig. 2) and a plurality of gate lines GL (shown in fig. 2) disposed on the first base 110, wherein the plurality of data lines DL are arranged in a third direction d3, the plurality of gate lines GL are arranged in a fourth direction d4, and the third direction d3 and the fourth direction d4 are staggered (e.g., but not limited to, perpendicular). The pixel structures SPX are electrically connected to the data lines DL and the gate lines GL. In this embodiment, the pixel array substrate 1 may further optionally include a plurality of switching lines GL interposed between the plurality of pixel structures SPX, the plurality of switching lines GL are disposed on the first base 110 and arranged in the third direction d3, and the plurality of switching lines GL are electrically connected to the plurality of gate lines GL.

Referring to fig. 1A, fig. 1B and fig. 2, to realize the display device with ultra-narrow frame, next, a portion of the peripheral region 1B of the pixel array substrate 1, a portion of the peripheral region 2B of the opposite substrate 2 and a portion of the sealant 4 disposed therebetween are removed, wherein when the portion of the peripheral region 1B of the pixel array substrate 1 is removed, a sidewall 110s of the first substrate 110 of the pixel array substrate 1 is formed; when the portion of the peripheral region 2b of the counter substrate 2 is removed, the side wall 210s of the second substrate 210 of the counter substrate 2 is formed.

Referring to fig. 2, in the present embodiment, the peripheral region 1b of the pixel array substrate 1 includes a bonding side 1b-1 and non-bonding sides 1b-2, 1b-3, and 1b-4, wherein the bonding side 1b-1 is provided with a plurality of pads (not shown) electrically connected to the plurality of pixel structures SPX, the pads being electrically connected to the driving device 7 (shown in fig. 3); the peripheral region 2b of the opposite substrate 2 includes non-bonded sides 2b-2, 2b-3, 2b-4 respectively overlapping the non-bonded sides 1b-2, 1b-3, 1b-4 of the peripheral region 1b of the pixel array substrate 1.

Referring to fig. 2 and 3, for example, in the present embodiment, a portion of the non-bonding side 1b-3, a portion of the non-bonding side 1b-4, and a portion of the non-bonding side 1b-2 of the peripheral region 1b of the pixel array substrate 1 may be removed to form a first sub-sidewall 110s-3, a first sub-sidewall 110s-4, and a second sub-sidewall 110s-2 of the sidewall 110s of the first substrate 110, wherein the first sub-sidewalls 110s-3 and 110s-4 respectively define a plurality of first edges 110e-3 and 110e-4 of the first substrate 110, the first edges 110e-3 and 110e-4 and the data lines DL are arranged in the third direction d3, the second sub-sidewall 110s-2 defines a second edge 110e-2 of the first substrate 110, and the second edge 110e-2 and the gate lines GL-2 are arranged in the fourth direction d 4.

In addition, in the embodiment, a portion of the non-bonding side 2b-2, a portion of the non-bonding side 2b-3, and a portion of the non-bonding side 2b-4 of the peripheral region 2b of the opposite substrate 2 may be removed to form a first sub-sidewall 210s-3, a first sub-sidewall 210s-4, and a second sub-sidewall 210s-2 (shown in fig. 3) of the sidewall 210s of the second substrate 210, respectively; moreover, portions of the sealant 4-2, 4-3, 4-4 between the non-bonding sides 1b-2, 1b-3, 1b-4 of the pixel array substrate 1 and the non-bonding sides 2b-2, 2b-3, 2b-4 of the opposite substrate 2 can be removed, and a portion of the sealant 4-1 on the bonding side 1b-1 can be remained, wherein the end point 4-1a of the remained portion of the sealant 4-1 is substantially aligned with the first sub-sidewalls 110s-3, 110s-4 of the sidewall 110s of the first substrate 110.

Referring to fig. 1C, next, under the condition that the upper and lower portions (e.g., the upper press head and the lower platen) of the tool P press and clamp the display panel DP so that the external substances (e.g., air, etc.) are not easy to enter the display panel DP, the side sealant 5 is formed on the sidewall 110s of the first substrate 110 and the sidewall 210s of the second substrate 210.

Referring to fig. 1C and fig. 3, for example, in the present embodiment, a side molding compound 5 may be formed on the first sub-sidewall 110s-3 of the first substrate 110, the first sub-sidewall 210s-3 of the second substrate 210, the first sub-sidewall 110s-4 of the first substrate 110, the first sub-sidewall 210s-4 of the second substrate 210, the second sub-sidewall 110s-2 of the first substrate 110, and the second sub-sidewall 210s-2 of the second substrate 210. In short, in the present embodiment, the display panel DP is rectangular, for example, and the side sealant 5 can be formed on two opposite short sides and one long side of the non-bonding side of the display panel DP. However, the present invention is not limited thereto, and the forming position of the side molding compound 5 is set and can be adjusted according to actual requirements.

Referring to fig. 1C, in the embodiment, after removing a portion of the sealant 4-2, 4-3, and 4-4, the side sealing compound 5 is formed on the sidewall 110s of the first substrate 110 and the sidewall 210s of the second substrate 210, so that the side sealing compound 5 can contact the display medium 3, but the invention is not limited thereto.

Referring to fig. 1D and 1E, the side sealing compound 5 includes a first portion 5-1, a second portion 5-2 and a third portion 5-3, wherein the first portion 5-1 is disposed on the sidewall 110s of the first substrate 110, the second portion 5-2 is disposed on the sidewall 210s of the second substrate 210, and the third portion 5-3 is disposed between the first portion 5-1 and the second portion 5-2.

Referring to fig. 1D and fig. 1E, a grinding process is performed on the side molding compound 5. Referring to fig. 1E, after the polishing process is completed, the third portion 5-3 of the side sealing compound 5 has a plane 5-3a facing away from the sidewall 110s of the first substrate 110 and the sidewall 210s of the second substrate 210, a thickness T1 of the first portion 5-1 of the side sealing compound 5 in the first direction d1 decreases with distance from the third portion 5-3 of the side sealing compound 5, and a thickness T2 of the second portion 5-2 of the side sealing compound 5 in the first direction d1 decreases with distance from the third portion 5-3 of the side sealing compound 5, wherein the first direction d1 is substantially perpendicular to the sidewall 110s of the first substrate 110. For example, in the embodiment, a cross section of the side molding compound 5 on a plane (e.g., the paper surface of fig. 1E) perpendicular to the first substrate 110 includes a trapezoid, but the invention is not limited thereto.

Referring to fig. 1F, a waterproof layer 6 is formed on the side molding compound 5, thereby completing the display device 10 of the present embodiment. The waterproof layer 6 is disposed on the side molding compound 5, wherein the side molding compound 5 is disposed between the waterproof layer 6 and the sidewall 110s of the first substrate 110 and between the waterproof layer 6 and the sidewall 210s of the second substrate 210.

For example, in the embodiment, the waterproof layer 6 may be formed by coating, the waterproof layer 6 has a surface 6a overlapping with the plane 5-3a of the side sealant 5, and the surface 6a of the waterproof layer 6 is convex. That is, in the embodiment, the waterproof layer 6 may be disposed on the side molding compound 5 without being conformal, but the invention is not limited thereto. In the present embodiment, the waterproof layer 6 is made of Polyurethane (PU), silicone, epoxy resin (Epoxy), silicon oxide (SiOx), fluorine-containing polymer, or other suitable materials.

It should be noted that in the present embodiment, after removing a portion of the peripheral area 1b of the pixel array substrate 1, a portion of the peripheral area 2b of the opposite substrate 2, and portions of the sealant 4-2, 4-3, and 4-4 located therebetween, the side sealant 5 is formed on the sidewall 110s of the first substrate 110 and the sidewall 210s of the second substrate 210, so that the width W (marked in fig. 3) of the frame of the display device 10 is not limited by the machine capability of the sealant 4, and the display device 10 with an ultra-narrow frame can be realized.

It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, which will not be repeated below.

Fig. 4 is a schematic cross-sectional view of a display device 10A according to an embodiment of the invention. The display device 10A of fig. 4 is similar to the display device 10 of fig. 1F, with the main differences: the manner of forming the waterproof layer 6 is different between the two.

Referring to fig. 4, in the present embodiment, the waterproof layer 6 may be formed by a Thin Film Encapsulation (TFE), and the waterproof layer 6 is substantially conformally disposed on the side molding compound 5. That is, the waterproof layer 6 has a surface 6a overlapping the plane 5-3a of the side molding compound 5, and the surface 6a is a plane substantially parallel to the plane 5-3a of the side molding compound 5. For example, in the present embodiment, the waterproof layer 6 may be made of Parylene (Parylene) or other suitable materials.

Fig. 6 is a schematic top view of a display device 10B according to an embodiment of the invention. Fig. 3 omits illustration of the display medium 3 and the waterproof layer 6.

The display device 10B of fig. 5 and 6 is similar to the display device 10 of fig. 1F and 3, with the main differences: the display device 10B of fig. 5 and 6 further includes a retaining wall structure 8.

Referring to fig. 5, in the embodiment, the side molding compound 5 further includes a fourth portion 5-4 disposed between the first substrate 110 and the second substrate 210 (i.e., between the peripheral region 1b of the pixel array substrate 1 and the peripheral region 2b of the opposite substrate 2, wherein the first substrate 110, the fourth portion 5-4 of the side molding compound 5, and the second substrate 210 are sequentially arranged in the second direction d2, and the first direction d1 is substantially perpendicular to the second direction d 2.

Referring to fig. 5 and 6, in the embodiment, the display device 10B further includes a retaining wall structure 8 disposed on one of the first substrate 110 and the second substrate 210 and abutting against the other of the first substrate 110 and the second substrate 210, wherein in a top view of the display device 10B, the retaining wall structure 8 is located between the plurality of pixel structures SPX and the side molding compound 5. The dam structure 8 can prevent a portion of the side molding compound 5 (i.e., the fourth portion 5-4 of the side molding compound 5) between the pixel array substrate 1 and the opposite substrate 2 from entering the

display regions

1a and 2a of the display device 10B and affecting the display quality of the display device 10B.

Fig. 7 is a schematic top view of a display device 10C according to an embodiment of the invention. Fig. 7 omits illustration of the display medium 3 and the waterproof layer 6.

The display device 10C of fig. 7 is similar to the display device 10 of fig. 3, with the main differences: the forming positions of the side edge sealing compound 5 are different.

Referring to fig. 7, in the present embodiment, a side molding compound 5 is formed on the first sub-sidewall 110s-3 of the first substrate 110, the first sub-sidewall 210s-4 of the second substrate 210, the first sub-sidewall 110s-4 of the first substrate 110, and the first sub-sidewall 210s-4 of the second substrate 210. In short, in the present embodiment, the display panel DP is, for example, rectangular, and the side sealant 5 can be formed on two opposite short sides of the display panel DP, and the side sealant 5 is not formed on the long side of the non-bonding side of the display panel DP.

Fig. 8 is a top view of a display device 10D according to an embodiment of the invention. Fig. 8 omits illustration of the display medium 3 and the waterproof layer 6.

The display device 10D of fig. 8 is similar to the display device 10 of fig. 3, with the main differences: the forming positions of the side edge sealing compound 5 are different.

Referring to fig. 8, in the present embodiment, a side molding compound 5 is formed on the first sub-sidewall 110s-3 of the first substrate 110, the first sub-sidewall 210s-3 of the second substrate 210, the second sub-sidewall 110s-2 of the first substrate 110, and the second sub-sidewall 210s-2 of the second substrate 210. In short, in the present embodiment, the display panel DP is, for example, rectangular, and the side sealant 5 can be formed on one of the short sides and one of the long sides of the non-bonding side of the display panel DP.

Fig. 9 is a schematic top view of a display device 10E according to an embodiment of the invention. Fig. 9 omits illustration of the display medium 3 and the waterproof layer 6.

The display device 10E of fig. 9 is similar to the display device 10D of fig. 8, with the main differences: in the embodiment of fig. 9, the display device 10E is resized.

Referring to fig. 9, in the present embodiment, since the display device 10E is resized, the side sealing compound 5 is adjacent to at least one pixel structure SPX. Specifically, in the present embodiment, the first sub-sidewall 110s-3 of the first substrate 110 may be substantially aligned with one end GLa of the gate line GL; the second sub-sidewall 110s-2 of the first substrate 110 may be substantially aligned with one end DLa of the data line DL; the side molding compound 5 may contact the sidewall GLas of the end GLa of the gate line GL and/or the sidewall DLas of the end DLa of the data line DL. Furthermore, in the embodiment, since the side sealing compound 5 has flowability during the forming process, the side sealing compound 5 penetrates between the first substrate 110 and the second substrate 210, and the side sealing compound 5 may overlap with the pixel electrode PE of the at least one pixel structure SPX corresponding to the first sub-sidewall 110s-3 of the first substrate 110, and/or the side sealing compound 5 may overlap with the pixel electrode PE of the at least one pixel structure SPX corresponding to the second sub-sidewall 110s-2 of the first substrate 110.

Claims

1. A display device, comprising:

a first substrate;

a plurality of pixel structures disposed on the first substrate;

a second substrate disposed opposite to the first substrate;

a display medium disposed between the first substrate and the second substrate; and

a side seal, including:

a first portion disposed on a sidewall of the first substrate;

a second portion disposed on a sidewall of the second substrate; and

a third portion disposed between the first portion and the second portion and having a plane facing away from the sidewall of the first substrate and the sidewall of the second substrate, wherein a thickness of the first portion in a first direction decreases with distance from the third portion, a thickness of the second portion in the first direction decreases with distance from the third portion, and the first direction is substantially perpendicular to the sidewall of the first substrate,

the peripheral region of the first substrate comprises a bonding side and a non-bonding side, wherein the bonding side is provided with a plurality of bonding pads electrically connected to the plurality of pixel structures,

the side sealant is only located on the non-bonding side,

wherein the side sealant contacts the display medium.

2. The display device of claim 1, further comprising:

and the side sealing glue is positioned between the waterproof layer and the side wall of the first substrate, and the side sealing glue is positioned between the waterproof layer and the side wall of the second substrate.

3. The display device according to claim 2, wherein the waterproof layer is substantially conformally disposed on the side sealant.

4. The display device according to claim 2, wherein the waterproof layer has a convex surface, and the convex surface of the waterproof layer overlaps the plane of the side sealant.

5. The display device of claim 1, wherein the side seal further comprises:

and a fourth portion disposed between the first substrate and the second substrate, wherein the first substrate, the fourth portion of the side sealant and the second substrate are sequentially arranged in a second direction, and the first direction is substantially perpendicular to the second direction.

6. The display device of claim 1, further comprising:

and a retaining wall structure disposed on one of the first substrate and the second substrate and abutting against the other of the first substrate and the second substrate, wherein in a top view of the display device, the retaining wall structure is located between the pixel structures and the side sealant.

7. The display device of claim 1, further comprising:

a plurality of data lines arranged on the first substrate and arranged in a third direction;

a plurality of gate lines disposed on the first substrate and arranged in a fourth direction, wherein the third direction is staggered with the fourth direction, and the pixel structures are electrically connected to the data lines and the gate lines; and

and a plurality of patch cords disposed on the first substrate and arranged in the third direction, wherein the patch cords are electrically connected to the gate lines.

8. The display device according to claim 7, wherein the first substrate has a plurality of first edges disposed opposite to each other and arranged in the third direction, the sidewalls of the first substrate include a plurality of first sub-sidewalls defining the first edges, and the side sealant is disposed on at least one of the first sub-sidewalls of the first substrate.

9. The display device of claim 8, wherein the first substrate further has a second edge, the second edge and the gate lines are arranged in the fourth direction, the sidewall of the first substrate includes a second sub-sidewall defining the second edge, and the side sealant is disposed on the second sub-sidewall of the first substrate.

10. The display device of claim 1, wherein the side encapsulant is adjacent to at least one of the pixel structures.