TWI687739B - Display appratus - Google Patents

Abstract

A display apparatus including a first substrate and pixels disposed on the first substrate is provided. Each of the pixels includes a first signal line, a thin film transistor electrically connected to the first signal line, a pixel electrode electrically connected to the thin film transistor and a first auxiliary electrode. The pixel electrode has first branch portions and second branch portions. The first branch portions define a first domain. The second branch portions define a second domain. An alignment direction of the first domain and an alignment direction of the second domain are different. A first boundary region is located between the first domain and the second domain. The first auxiliary electrode is disposed on the first boundary region and partially overlapped with the first signal line. The first auxiliary electrodes of any two adjacent pixels are separated from each other.

Description

Display device

The present invention relates to an electronic device, and particularly to a display device.

Common flat displays include liquid crystal displays, organic light-emitting diode displays, plasma displays, etc. The flat panel display can be applied to various electronic products (for example: TVs, desktop screens, notebook computers, mobile phones, etc.). Different types of electronic products require different sizes of flat panel displays. According to the needs of various electronic products, flat-panel displays of different sizes are produced separately, which takes a long time to develop and is not in line with economic benefits. Therefore, a large-sized flat panel display can be resized to form a flat panel display of various desired sizes. In the process of forming a flat display with a desired size, the cut flat display is exposed to the pads first, and then the conductive pads are used to electrically connect the pads to the flexible printed circuit board. However, the contact area between the conductive element and the side of the pad is small, resulting in excessive contact resistance between the two, which is detrimental to the manufacturing yield and performance of the flat panel display.

The invention provides a display device with good performance.

The display device of the present invention includes a first substrate and a plurality of pixels provided on the first substrate. Each pixel includes a first signal line, a thin film transistor electrically connected to the first signal line, a pixel electrode electrically connected to the thin film transistor, and a first auxiliary electrode. The pixel electrode has a plurality of first branch portions and a plurality of second branch portions. The first branch defines a first alignment area. The second branch defines a second alignment zone. The alignment direction of the first alignment zone is different from the alignment direction of the second alignment zone. There is a first junction area between the first alignment area and the second alignment area. The first auxiliary electrode is disposed on the first junction area and partially overlaps the first signal line. The plurality of first auxiliary electrodes of any two adjacent plurality of pixels are separated from each other.

Based on the above, after the display device of one embodiment of the present invention is resized, the first auxiliary electrode is electrically connected to the first signal line, and the first auxiliary electrode can be regarded as an auxiliary pad corresponding to the first signal line. The first conductive pattern formed on the side of the first substrate not only contacts the side of the first signal line, but also contacts the side of the auxiliary pad. As a result, the contact area between the first conductive pattern and the corresponding conductive element of the pixel array substrate becomes larger, and the contact resistance becomes smaller, thereby improving the reliability of the resized display device.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

1, 1’, 1A, 1A’, 1C, 1C’, 1D, 1D’: display device

10, 20: cutting lane

100, 100’, 100A, 100A’, 100B, 100B’, 100C, 100C’, 100D, 100D’, 100E, 100E’: pixel array substrate

110: the first substrate

112, 114: side

120: pixel electrode

121: The first branch

122: Second branch

123: Third branch

124: The fourth branch

125: First cadre

126: The second cadre

130, 130C: the first auxiliary electrode

130a: side

140, 140D: second auxiliary electrode

140a: side

142: Main Department

144: Connection

200: second substrate

300: display medium

400: Sealant

412, 414: side

510: first conductive pattern

520: second conductive pattern

610: the first flexible circuit board

612: electrode

620: Second flexible circuit board

622: Electrode

412, 414: side

A-A’, B-B’, C-C’, D-D’: section line

B1: First junction area

B2: Second junction area

CH: semiconductor pattern

D: Jiji

H: contact window

G: gate

g1, g2: gap

GI, PV1, PV2: insulating layer

CL: shared line

SL1: the first signal line

SL1a: side

SL2: Second signal line

SL2a: side

S: source

T: thin film transistor

P: Pixel

L1, L2: length

W1, W2: line width

R1: first alignment area

R2: second alignment area

R3: third alignment area

R4: Fourth alignment area

x, y, z, d1~d4: direction

FIG. 1 is a cross section of a display device 1 without resizing according to a first embodiment of the invention Schematic diagram.

2 is a schematic top view of the pixel array substrate 100 of the display device 1 without resizing according to the first embodiment of the present invention.

3 is a schematic cross-sectional view of the resized display device 1'according to the first embodiment of the present invention.

4 is a schematic top view of the pixel array substrate 100' of the resized display device 1'according to the first embodiment of the present invention.

Fig. 5 is a schematic side view of the resized display device 1'according to the first embodiment of the present invention.

6 is a schematic cross-sectional view of a non-resized display device 1A according to a second embodiment of the invention.

7 is a schematic top view of a pixel array substrate 100A of a display device 1A without resize according to a second embodiment of the present invention.

8 is a schematic cross-sectional view of a resized display device 1A' according to a second embodiment of the present invention.

9 is a schematic top view of a pixel array substrate 100A' of a resized display device 1A' according to a second embodiment of the present invention.

Fig. 10 is a schematic side view of a resized display device 1A' according to a second embodiment of the invention.

11 is a schematic top view of a pixel array substrate 100B without resizing according to a third embodiment of the present invention.

12 is a resized pixel array substrate of a third embodiment of the invention Top view schematic diagram of 100B.

13 is a schematic cross-sectional view of a display device 1C without resizing according to a fourth embodiment of the present invention.

14 is a schematic top view of a pixel array substrate 100C of a display device 1C without resize according to a fourth embodiment of the present invention.

15 is a schematic cross-sectional view of a resized display device 1C' according to a fourth embodiment of the present invention.

16 is a schematic top view of a pixel array substrate 100C' of a resized display device 1C' according to a fourth embodiment of the present invention.

17 is a schematic side view of a resized display device 1C' according to a fourth embodiment of the present invention.

18 is a schematic cross-sectional view of a display device 1D without resizing according to a fifth embodiment of the present invention.

19 is a schematic top view of a pixel array substrate 100D of a display device 1D without resize according to a fifth embodiment of the present invention.

20 is a schematic cross-sectional view of a resized display device 1D' according to a fifth embodiment of the present invention.

21 is a schematic top view of a pixel array substrate 100D' of a resized display device 1D' according to a fifth embodiment of the present invention.

22 is a schematic side view of a resized display device 1D' according to a fifth embodiment of the present invention.

23 is a pixel array substrate without resizing according to the sixth embodiment of the present invention 100E top view schematic.

Fig. 24 is a schematic top view of a resized pixel array substrate 100E' according to a sixth embodiment of the invention.

Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

For the sake of clear explanation, some drawings schematically depict the xyz rectangular coordinate system, in which the directions x, y, and z are perpendicular. It should be noted that, in this specification, the directions x, y, and z drawn in the figures are only used to illustrate the invention, not to limit the invention, and the invention does not limit the directions x, y, and z. Be perpendicular.

1 is a schematic cross-sectional view of a non-resized display device 1 according to a first embodiment of the invention. 2 is a schematic top view of the pixel array substrate 100 of the display device 1 without resizing according to the first embodiment of the present invention. The cross section of the pixel array substrate 100 of FIG. 1 corresponds to the section line A-A' of FIG.

1 and 2, the display device 1 includes a pixel array substrate 100, a second substrate 200, and a display medium 300. The pixel array substrate 100 includes a first substrate 110. The second substrate 200 is disposed opposite to the first substrate 110. The display medium 300 is disposed between the first substrate 110 and the second substrate 200. For example, in this embodiment, the material of the first substrate 110 and/or the second substrate 200 may be glass, quartz, organic polymer, or other suitable materials. In this embodiment, the display medium 300 For example, it is liquid crystal, but the present invention is not limited to this.

The pixel array substrate 100 includes a plurality of pixels P disposed on the first substrate 110. For example, in this embodiment, each pixel P includes a first signal line SL1, a second signal line SL2, a thin film transistor T, and a pixel electrode 120. The first signal line SL1 extends in the first direction y, the second signal line SL2 extends in the second direction x, and the first direction y intersects the second direction x. For example, the first direction y and the second direction x may be perpendicular, but the invention is not limited thereto. In other embodiments, the first direction y and the second direction x may not be perpendicular. The thin film transistor T is electrically connected to the first signal line SL1 and the second signal line SL2. In detail, the thin film transistor T includes a gate electrode G, a semiconductor pattern CH, and a source electrode S and a drain electrode D electrically connected to different two regions of the semiconductor pattern CH, respectively. For example, the first signal line SL1 is electrically connected to the source S of the thin film transistor T, and the second signal line SL2 is electrically connected to the gate G of the thin film transistor T. In other words, in this embodiment, the first signal line SL1 is a data line, and the second signal line SL2 is a scanning line. However, it is not limited to this. In other embodiments, when the first signal line SL1 is a scanning line and the second signal line SL2 is a data line, the first signal line SL1 is electrically connected to the gate G of the thin film transistor T , And the second signal line SL2 is electrically connected to the source S of the thin film transistor T.

In this embodiment, each pixel P further includes a plurality of common lines CL provided on the first substrate 110. The common line CL overlaps part of the pixel electrodes 120 to form a storage capacitor. The common line CL has a predetermined potential. The predetermined potential may be a ground potential, a fixed potential, a floating potential, an adjustable potential, or other suitable potential. In this embodiment, the common line CL extends substantially in the second direction x. In other words, The extension direction of the common line CL is substantially the same as the extension direction of the second signal line SL2; however, the present invention is not limited thereto. For example, in other embodiments, the common line CL may be in the first direction y extend.

For example, in this embodiment, the common line CL, the second signal line SL2 and the gate G of the thin film transistor T can selectively belong to the same first conductive layer; the first signal line SL1 and the thin film transistor T The source electrode S and the drain electrode D of the thin film transistor T can selectively belong to the same second conductive layer, but the invention is not limited thereto. Based on conductivity considerations, metal materials are generally used for the first conductive layer and the second conductive layer. However, the present invention is not limited to this. In other embodiments, the first conductive layer and the second conductive layer may also use other conductive materials. For example: alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or stacked layers of metal materials and other conductive materials.

The pixel electrode 120 is electrically connected to the thin film transistor T. For example, in this embodiment, the pixel array substrate 100 further includes an insulating layer PV1 (shown in FIG. 1), which is disposed on the first signal line SL1; the pixel electrode 120 is disposed on the insulating layer PV1, and The element electrode 120 can be electrically connected to the drain electrode D of the thin film transistor T through the contact window H (shown in FIG. 2) of the insulating layer PV1.

The pixel electrode 120 has a plurality of first branch portions 121 and a plurality of second branch portions 122. The plurality of first branch portions 121 define a first alignment area R1. The plurality of second branch portions 122 define a second alignment area R2. The alignment direction d1 of the first alignment area R1 is different from the alignment direction d2 of the second alignment area R2, and there is a first boundary area B1 between the first alignment area R1 and the second alignment area R2. In this embodiment, the pixel electrode 120 further has The first trunk portion 125 provided in the first boundary area B1 is connected between the plurality of first branch portions 121 and the plurality of second branch portions 122. The extending direction of the first trunk portion 125 may selectively coincide with the extending direction of the second signal line SL2. The second branch portion 122 and the first branch portion 121 may be located on the upper and lower sides of the first trunk portion 125, respectively. The pixel electrode 120 further has a plurality of third branch portions 123. The plurality of third branch portions 121 define a third alignment area R3. The alignment direction d1 of the first alignment area R1, the alignment direction d2 of the second alignment area R2, and the alignment direction d3 of the third alignment area R3 are different from each other. There is a second boundary area B2 between the first alignment area R1 and the third alignment area R3. The pixel electrode 120 further has a second trunk portion 126 disposed in the second border area B2. The second trunk portion 126 and the first trunk portion 125 are arranged crosswise. The extending direction of the second trunk portion 126 can selectively coincide with the extending direction of the first signal line SL1. The second trunk portion 126 is connected between the plurality of first branch portions 121 and the plurality of third branch portions 123. For example, the third branch portion 123 and the first branch portion 121 may be located on the left and right sides of the second trunk portion 126, respectively, and the third branch portion 123 and the first branch portion 121 may be located below the first trunk portion 125 side. The pixel electrode 120 further has a plurality of fourth branch portions 124. The plurality of fourth branch portions 124 defines a fourth alignment region R4, an alignment direction d1 of the first alignment region R1, an alignment direction d2 of the second alignment region R2, and a third The alignment direction d3 of the alignment region R3 and the alignment direction d4 of the fourth alignment region R4 are different from each other. The second trunk portion 126 is also connected between the plurality of second branch portions 122 and the plurality of fourth branch portions 124. The first trunk portion 125 is also connected between the plurality of third branch portions 123 and the plurality of fourth branch portions 124. For example, the fourth branch portion 124 and the second branch portion 122 may be located on the left and right sides of the second trunk portion 126, respectively, and the fourth branch portion 124 and the second branch portion 122 may be located on the first An upper side of the trunk 125.

In this embodiment, the pixel electrode 120 may be a transmissive pixel electrode, a reflective pixel electrode, or a combination thereof. For example, the material of the transmissive pixel electrode includes metal oxides, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, or other suitable oxidation Or a stacked layer of at least two of the above; the material of the reflective pixel electrode includes a metal material with high reflectivity, such as aluminum, silver, or other suitable materials.

It is worth noting that each pixel P includes a first auxiliary electrode 130, which is disposed on the first boundary region B1 and partially overlaps the first signal line SL1. In this embodiment, the first auxiliary electrode 130 overlaps the first trunk portion 125. The first signal line SL1 extends in the first direction y, and the first auxiliary electrode 130 extends in the second direction x, where the first direction y and the second direction x are staggered. The first signal line SL1 has a line width W1 in the second direction x, the first auxiliary electrode 130 has a length L1 in the second direction x, and the length L1 of the first auxiliary electrode 130 is greater than the line width W1 of the first signal line SL1 . An insulating layer GI (shown in FIG. 1) is disposed between the first auxiliary electrode 130 and the first signal line SL1. The plurality of first auxiliary electrodes 130 of any two adjacent pixel P are separated from each other. In detail, there is a gap g1 between the plurality of first auxiliary electrodes 130 of any two adjacent pixels P, and the gap g1 overlaps the pixel electrode 120 of one of the pixels P. Before the display device 1 is resized, the first auxiliary electrode 130 floats. In this embodiment, the first auxiliary electrode 130 and the second signal line SL2 can selectively belong to the same first conductive layer, but the invention is not limited thereto.

Fig. 3 shows a resized display device 1'according to the first embodiment of the present invention Sectional schematic. 4 is a schematic top view of the pixel array substrate 100' of the resized display device 1'according to the first embodiment of the present invention. The cross-section of the pixel array substrate 100' in FIG. 3 corresponds to the cross-sectional line A-A' in FIG. Fig. 5 is a schematic side view of the resized display device 1'according to the first embodiment of the present invention. In this embodiment, the display device 1 can be manufactured as the display device 1'by using a resizing method. For example, the re-sizing method may include the following steps, which will be illustrated below with reference to FIGS. 2 to 5.

Please refer to FIGS. 3 to 4. In this embodiment, first, the first auxiliary electrode 130 of the bit pixel P and the first signal line SL1 are electrically connected. For example, the intersection of the first signal line SL1 and the first auxiliary electrode 130 may be irradiated with laser light to fuse the first signal line SL1 and the first auxiliary electrode 130 to each other. Then, the pixel array substrate 100 (shown in FIG. 2) may be cut along a predetermined scribe line 10 (shown in FIG. 2) to form a pixel array substrate 100'. But not limited to this, in other embodiments, the pixel array substrate 100 (shown in FIG. 2) may be cut along a predetermined scribe line 10 (shown in FIG. 2), and then the first signal is welded by laser irradiation The line SL1 and the first auxiliary electrode 130. Then, a sealant 400 (shown in FIG. 3) is filled between the first substrate 110 and the second substrate 200. Part of the sealant 400 penetrates between the first substrate 110 and the second substrate 200, is located on the first signal line SL1 and the first auxiliary electrode 130, and is arranged along the cutting lane 10 (shown in FIG. 2) and is being cut Multiple pixels P near the track 10 overlap.

Then, at least polish the pixel array substrate 100 and the sealant 400 to form the side 112 (marked in FIG. 5) of the first substrate 110 corresponding to the scribe line 10 and the side 412 (marked in FIG. 5) of the sealant 400 ). In the above grinding process, The pixel array substrate 100 and the sealant 400 can be simultaneously polished, so the side SL1a (marked in FIG. 5) and the first auxiliary of the first signal line SL1 of the pixel P arranged along the cutting lane 10 and near the cutting lane 10 The side 130 a of the electrode 130 (marked in FIG. 5) may be substantially aligned with the side 112 of the first substrate 110 and the side 412 of the sealant 400.

Next, the first conductive pattern 510 is disposed on the side 112 of the first substrate 110, wherein the first conductive pattern 510 is in contact with the side SL1a of the first signal line SL1 and the side 130a of the first auxiliary electrode 130. In this embodiment, the first conductive pattern 510 can be fabricated using a laser patterned metal layer. However, the present invention is not limited to this. In other embodiments, the first conductive pattern 510 may also be manufactured by inkjet printing, flexo printing, gravure printing, or other suitable methods.

Next, the first flexible circuit board 610 and the first conductive pattern 510 are joined so that the electrode 612 (marked in FIG. 5) of the first flexible circuit board 610 passes through the first conductive pattern 510 and the side surface SL1a of the first signal line SL1 and the first The side 130a of an auxiliary electrode 130 is electrically connected; thereby, the resized display device 1'can be completed. For example, in this embodiment, the above-mentioned bonding process may use a hot-pressing process, but the invention is not limited thereto.

It is worth mentioning that after the first auxiliary electrode 130 is electrically connected to the first signal line SL1, the first auxiliary electrode 130 can be regarded as an auxiliary pad corresponding to the first signal line SL1. The first conductive pattern 510 formed on the side 112 of the first substrate 110 not only contacts the side SL1a of the first signal line SL1, but also contacts the side of the auxiliary pad (for example, the side 130a of the first auxiliary electrode 130). By this, the corresponding conductive elements of the first conductive pattern 510 and the pixel array substrate 100' (i.e., the first signal line The contact area between SL1 and the first auxiliary electrode 130) becomes larger, the contact resistance becomes smaller, and the reliability of the display device 1'can be improved.

In addition, the alignment direction of the display medium 300 (e.g., liquid crystal) on the first boundary area B1 is discontinuous. Therefore, when displaying images on the display devices 1, 1', the first boundary area B1 is a discrete line. Since the first auxiliary electrode 130 is disposed in the first boundary region B1 (i.e., the area corresponding to the dark line), the arrangement of the first auxiliary electrode 130 does not excessively affect the transmittance of the display devices 1, 1'.

6 is a schematic cross-sectional view of a non-resized display device 1A according to a second embodiment of the invention. 7 is a schematic top view of a pixel array substrate 100A of a display device 1A without resize according to a second embodiment of the present invention. The cross section of the pixel array substrate 100A of FIG. 6 corresponds to the section line B-B' of FIG. 7.

The display device 1A and the pixel array substrate 100A of the second embodiment are similar to the display device 1 and the pixel array substrate 100 of the first embodiment, and the main differences between the two embodiments are: the display device 1A and the image of the second embodiment The element array substrate 100A includes the second auxiliary electrode 140 and does not include the first auxiliary electrode 130. To explain the difference between the two embodiments, for the similarities or similarities between the two embodiments, please refer to the foregoing description, and will not be repeated here.

Referring to FIGS. 6 and 7, each pixel P of the pixel array substrate 100A includes the second auxiliary electrode 140 and does not include the first auxiliary electrode 130. The second auxiliary electrode 140 is disposed on the second boundary region B2 and partially overlaps the second signal line SL2. In this embodiment, the second auxiliary electrode 140 overlaps the second trunk portion 126. In the extending direction of the second auxiliary electrode 140 (eg, the first direction y), the second signal line SL2 has a line With a width W2, the second auxiliary electrode 140 has a length L2, and the length L2 of the second auxiliary electrode 140 is greater than the line width W2 of the second signal line SL2. An insulating layer GI (shown in FIG. 6) is provided between part of the second auxiliary electrode 140 (for example: the connecting portion 144) and the second signal line SL2. The plurality of second auxiliary electrodes 140 of any two adjacent pixel P are separated from each other. In detail, there is a gap g2 between the plurality of second auxiliary electrodes 140 of any two adjacent pixel P. The gap g2 may overlap, for example, the common line CL of one of the pixels P, but the invention is not limited thereto. Before the display device 1A is resized, the second auxiliary electrode 140 floats.

In this embodiment, the second auxiliary electrode 140 includes a main portion 142 interlaced with the first trunk portion 125 of the pixel electrode 120. The main portion 142 of the second auxiliary electrode 140 may selectively belong to the same first conductive layer as the second signal line SL2. The second auxiliary electrode 140 further includes a connecting portion 144, and both ends of the connecting portion 144 respectively overlap a corresponding main portion 142 and a corresponding second signal line SL2. The connection portion 144 of the second auxiliary electrode 140 can selectively belong to the same second conductive layer as the first signal line SL1.

8 is a schematic cross-sectional view of a resized display device 1A' according to a second embodiment of the present invention. 9 is a schematic top view of a pixel array substrate 100A' of a resized display device 1A' according to a second embodiment of the present invention. The cross-section of the pixel array substrate 100A' of FIG. 8 corresponds to the cross-sectional line B-B' of FIG. Fig. 10 is a schematic side view of a resized display device 1A' according to a second embodiment of the invention. In this embodiment, the display device 1A can be manufactured as the display device 1A' using the resize method. For example, the re-sizing method may include the following steps, which are illustrated below with reference to FIGS. 8 to 10.

Please refer to FIGS. 8 to 9. In this embodiment, first, the second auxiliary electrode 140 and the second signal line SL2 are electrically connected. For example, in this embodiment, the two ends of the connecting portion 144 of the second auxiliary electrode 140 may be irradiated with laser, so that the two ends of the connecting portion 144 are welded to the main portion 142 and the second signal line SL2, respectively. In other words, the main portion 142 of the second auxiliary electrode 140 can be electrically connected to the second signal line SL2 by the connecting portion 144. Next, the pixel array substrate 100A may be cut along a predetermined scribe line 20 (shown in FIG. 7), thereby forming a pixel array substrate 100A'. However, it is not limited to this. In other embodiments, the pixel array substrate 100A may be cut first, and then the second signal line SL2 and the second auxiliary electrode 140 may be welded. Then, a sealant 400 (shown in FIG. 8) is filled between the first substrate 110 and the second substrate 200. Part of the sealant 400 penetrates between the first substrate 110 and the second substrate 200, is located on the second signal line SL2 and the second auxiliary electrode 140, and is arranged along the cutting lane 20 and near the cutting lane 10 Prime P overlaps.

Then, the pixel array substrate 100A and the sealant 400 are polished to form the side 114 (marked in FIG. 10) of the first substrate 110 corresponding to the scribe line 10 and the side 414 (marked in FIG. 10) of the sealant 400 . In the above-mentioned polishing process, the pixel array substrate 100A and the sealant 400 can be simultaneously polished. Therefore, the side SL2a (marked in the figure) of the second signal line SL2 of the pixel P arranged along the scribe line 20 and near the scribe line 20 10) and the side 140a (marked in FIG. 10) of the second auxiliary electrode 140 can be substantially aligned with the side 114 of the first substrate 110 and the side 414 of the sealant 400.

Next, the second conductive pattern 520 is disposed on the side of the first substrate 110 114, wherein the second conductive pattern 520 is in contact with the side surface SL2a of the second signal line SL2 and the side surface 140a of the second auxiliary electrode 140. In this embodiment, the second conductive pattern 520 is made by using a laser patterned metal layer, for example. However, the present invention is not limited to this. In other embodiments, the second conductive pattern 520 may also be manufactured by inkjet printing, flexographic printing, gravure printing, or other suitable methods.

Next, the second flexible circuit board 620 and the first conductive pattern 520 are joined so that the electrode 622 of the second flexible circuit board 620 passes through the first conductive pattern 520 and the side surface SL2a of the second signal line SL2 and the side surface of the second auxiliary electrode 140 140a is electrically connected; thereby, the resized display device 1A' can be completed. For example, in this embodiment, the above-mentioned bonding process may use a hot-pressing process, but the invention is not limited thereto.

It is worth mentioning that after the second auxiliary electrode 140 is electrically connected to the second signal line SL2, the second auxiliary electrode 140 can be regarded as an auxiliary pad corresponding to the second signal line SL2. The second conductive pattern 520 formed on the side 114 of the first substrate 110 not only contacts the side SL2a of the second signal line SL2, but also contacts the side of the auxiliary pad (for example, the side 140a of the second auxiliary electrode 140). As a result, the contact area between the second conductive pattern 520 and the corresponding conductive elements of the pixel array substrate 100A' (ie, the second signal line SL2 and the second auxiliary electrode 140) becomes larger, and the contact resistance becomes smaller, thereby improving the display device 1A 'Reliability.

In addition, the alignment direction of the display medium 300 (e.g., liquid crystal) on the second boundary area B2 is discontinuous. Therefore, when the display device 1A, 1A' displays a screen, the second boundary area B2 is a discontinuous line. Since the second auxiliary electrode 140 is disposed in the second boundary region B2 (ie, the area corresponding to the dark line), the second auxiliary electrode 140 The setting of the pole 140 does not excessively affect the transmittance of the display devices 1A, 1A'.

11 is a schematic top view of a pixel array substrate 100B without resizing according to a third embodiment of the present invention. 12 is a schematic top view of a resized pixel array substrate 100B' according to a third embodiment of the present invention. The pixel array substrates 100B, 100B' of the third embodiment and the display device (not shown) composed thereof are similar to the display device 1 composed of the pixel array substrates 100, 100' of the first embodiment. The difference between the pixel array substrates 100B, 100B' of the third embodiment and the pixel array substrates 100, 100' of the first embodiment is that the pixel array substrates 100B, 100B' of the third embodiment include the first auxiliary electrode 130 And the second auxiliary electrode 140; the first auxiliary electrode 130 is separated from the second auxiliary electrode 140; one second auxiliary electrode 140 separates two adjacent first auxiliary electrodes 130: a plurality of first auxiliary electrodes 130 and a plurality of first The two auxiliary electrodes 140 are alternately arranged in the second direction x. The display device composed of the pixel array substrates 100B, 100B' has similar functions and advantages as the aforementioned display devices 1, 1', 1A, 1A' composed of the pixel array substrates 100, 100', 100A, 100A'. I will not repeat them here.

13 is a schematic cross-sectional view of a display device 1C without resizing according to a fourth embodiment of the present invention. 14 is a schematic top view of a pixel array substrate 100C of a display device 1C without resize according to a fourth embodiment of the present invention. The cross section of the pixel array substrate 100C of FIG. 13 corresponds to the section line C-C' of FIG. The display device 1C and its pixel array substrate 100C of the fourth embodiment are similar to the display device 1 and its pixel array substrate 100 of the first embodiment, and the difference between the two embodiments is: the display device 1 and its pixel array substrate 100 The first auxiliary electrode 130 is formed on the first conductive layer, and the first auxiliary electrode 130C of the display device 1C and its pixel array substrate 100C is formed The third conductive layer will be described below with reference to FIGS. 13 and 14.

13 and 14, in this embodiment, the insulating layer GI is disposed on the second signal line SL2, the first signal line SL1 is disposed on the insulating layer GI, and the insulating layer PV1 is disposed on the first signal line SL1 , And the first auxiliary electrode 130C is disposed on the insulating layer PV1. The pixel array substrate 100C further includes an insulating layer PV2, which is disposed on the first auxiliary electrode 130C. The pixel electrode 120 is disposed on the insulating layer PV2. In short, in this embodiment, the second signal line SL2 is formed on the first conductive layer, the first signal line SL1 is formed on the second conductive layer, and the first auxiliary electrode 130C is formed on the third Conductive layer. The materials that can be used for the third conductive layer are similar to the first conductive layer, and will not be repeated here.

15 is a schematic cross-sectional view of a resized display device 1C' according to a fourth embodiment of the present invention. 16 is a schematic top view of a pixel array substrate 100C' of a resized display device 1C' according to a fourth embodiment of the present invention. The cross section of the pixel array substrate 100C' in FIG. 15 corresponds to the cross-sectional line C-C' in FIG. 17 is a schematic side view of a resized display device 1C' according to a fourth embodiment of the present invention. Similarly, the resized display device 1C' can be made using the aforementioned re-sizing method. Those skilled in the art should be able to implement the display device 1C' according to the foregoing description of the re-sizing method and FIGS. 13-17. This will not be restated.

18 is a schematic cross-sectional view of a display device 1D without resizing according to a fifth embodiment of the present invention. 19 is a schematic top view of a pixel array substrate 100D of a display device 1D without resize according to a fifth embodiment of the present invention. The cross-section of the pixel array substrate 100D in FIG. 18 corresponds to the cross-sectional line D-D' in FIG. Display of the fourth embodiment The device 1D and its pixel array substrate 100D are similar to the display device 1A and its pixel array substrate 100A of the second embodiment, the difference between the two embodiments is: the display device 1A and the second auxiliary electrode 140 of the pixel array substrate 100A The main portion 142 formed in the first conductive layer and the connection portion 144 formed in the second conductive layer are formed, and the second auxiliary electrode 140D of the display device 1D and the pixel array substrate 100D is formed on the third conductive layer, and the following Figures 18 and 19 illustrate this.

18 and 19, in this embodiment, the insulating layer GI is disposed on the second signal line SL2, the first signal line SL1 is disposed on the insulating layer GI, and the insulating layer PV1 is disposed on the first signal line SL1 , And the second auxiliary electrode 140D is disposed on the insulating layer PV1. The pixel array substrate 100D further includes an insulating layer PV2, which is disposed on the second auxiliary electrode 140D. The pixel electrode 120 is disposed on the insulating layer PV2. In short, in this embodiment, the second signal line SL2 is formed on the first conductive layer, the first signal line SL1 is formed on the second conductive layer, and the second auxiliary electrode 140D is formed on the third conductive layer, for example. Conductive layer. But not limited to this, in other embodiments, the second auxiliary electrode 140D formed in the third conductive layer may be disposed under the second signal line SL2, that is, the second auxiliary electrode 140D is disposed on the insulating layer GI and Between the insulating layer PV1.

20 is a schematic cross-sectional view of a resized display device 1D' according to a fifth embodiment of the present invention. 21 is a schematic top view of a pixel array substrate 100D' of a resized display device 1D' according to a fifth embodiment of the present invention. The cross-section of the pixel array substrate 100D' in FIG. 20 corresponds to the cross-sectional line D-D' in FIG. 22 is a schematic side view of a resized display device 1D' according to a fifth embodiment of the present invention. Similarly, before using The re-sizing method described above can produce a re-sized display device 1D'. The difference between the process of forming the display device 1A' and the process of forming the display device 1D' is that the position where the second auxiliary electrode 140 is welded (as shown in FIG. 9) and the position where the second auxiliary electrode 140D is welded (as shown in FIG. 9) 21) different. In detail, in this embodiment, the entire second auxiliary electrode 140D is formed on the same third conductive layer, and one end of the second auxiliary electrode 140D overlaps the second signal line SL2; in the process of forming the display device 1D′, One end of the second auxiliary electrode 140D is fused to the second signal line SL2. Those with ordinary knowledge in the art should be able to implement the display device 1D' according to the description of the aforementioned re-sizing method and FIGS. 18 to 22, which will not be repeated here.

23 is a schematic top view of a pixel array substrate 100E without resizing according to the sixth embodiment of the present invention. Fig. 24 is a schematic top view of a resized pixel array substrate 100E' according to a sixth embodiment of the invention. The display composed of the pixel array substrates 100E, 100E' of the sixth embodiment and the display device (not shown) and the pixel array substrates 100C, 100C' and the pixel array substrates 100C, 100C' of the fourth embodiment The devices 1C, 1C' are similar. The pixel array substrates 100E, 100E' of the sixth embodiment differ from the pixel array substrates 100C, 100C' of the fourth embodiment in that the pixel array substrate 100E of the sixth embodiment includes both the first auxiliary electrode 130C and the first Two auxiliary electrodes 140D; the first auxiliary electrode 130C is separated from the second auxiliary electrode 140D; one second auxiliary electrode 140D separates the adjacent two first auxiliary electrodes 130C: a plurality of first auxiliary electrodes 130C and a plurality of second auxiliary electrodes 140D are alternately arranged in the second direction x. A display device composed of pixel array substrates 100E, 100E' and the aforementioned display devices 1C, 1C' composed of pixel array substrates 100C, 100C', 100D, 100D', The similar functions and advantages of 1D and 1D’ will not be repeated here.

In summary, a display device according to an embodiment of the present invention includes a first substrate and a plurality of pixels disposed on the first substrate. Each pixel includes a signal line, a thin film transistor electrically connected to the signal line, a pixel electrode electrically connected to the thin film transistor, and an auxiliary electrode. The pixel electrode has a plurality of first branch portions, a plurality of second branch portions, a plurality of third branch portions, and a plurality of fourth branch portions. The first, second, third, and fourth branches respectively define the first, second, third, and fourth alignment zones. The alignment directions of the first, second, third and fourth alignment zones are different from each other. There is a first junction area between the first alignment area and the second alignment area. There is a second boundary area between the first alignment area and the third alignment area. The auxiliary electrode is disposed on the first junction area and/or the second junction area, and partially overlaps the signal line. The auxiliary electrodes of any two adjacent multiple pixels are separated from each other.

After the display device according to an embodiment of the present invention is resized, the auxiliary electrode is electrically connected to the signal line, and the auxiliary electrode can be regarded as an auxiliary pad corresponding to the signal line. The conductive pattern formed on the side of the first substrate contacts the side of the auxiliary pad in addition to the side of the signal line. As a result, the contact area between the conductive pattern and the corresponding conductive element of the pixel array substrate becomes larger, the contact resistance becomes smaller, and the reliability of the resized display device can be improved.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

10: Cutting path

100: pixel array substrate

110: the first substrate

120: pixel electrode

121: The first branch

122: Second branch

123: Third branch

124: The fourth branch

125: First cadre

126: The second cadre

130: first auxiliary electrode

A-A’: section line

B1: First junction area

B2: Second junction area

CH: semiconductor pattern

D: Jiji

H: contact window

G: gate

g1: clearance

CL: shared line

SL1: the first signal line

SL2: Second signal line

S: source

T: thin film transistor

P: Pixel

L1: Length

W1: line width

R1: first alignment area

R2: second alignment area

R3: third alignment area

R4: Fourth alignment area

x, y, z, d1~d4: direction

Claims (15)

A display device includes: a first substrate; a plurality of pixels, disposed on the first substrate, each pixel includes: a first signal line; a thin film transistor, electrically connected to the first signal line A pixel electrode, electrically connected to the thin film transistor, and has a plurality of first branch portions and a plurality of second branch portions, the first branch portions define a first alignment area, the second branch portions Defining a second alignment zone, the alignment direction of the first alignment zone is different from the alignment direction of the second alignment zone, and there is a first junction zone between the first alignment zone and the second alignment zone; and a first An auxiliary electrode is disposed on the first junction area and partially overlaps the first signal line, wherein the first auxiliary electrode of at least one pixel of the pixels is electrically connected to the at least one pixel The first signal line; and a first conductive pattern, disposed on the first side of the first substrate, and a side of the first auxiliary electrode of the at least one pixel and a side of the first signal line Contact; the first auxiliary electrodes of any two adjacent pixels are separated from each other. The display device as described in item 1 of the patent application scope, wherein the pixel electrode further has a first trunk portion disposed at the first junction area, the first trunk portion is connected to the first branch portions and the Between the second branch parts, the first auxiliary electrode overlaps the first trunk part. The display device according to item 1 of the patent application scope, wherein the first signal line extends in a first direction, the first auxiliary electrode extends in a second direction, and the first direction and the second direction staggered. The display device according to item 3 of the patent application scope, wherein the first signal line has a line width in the second direction, the first auxiliary electrode has a length in the second direction, and the first auxiliary electrode The length of is greater than the line width of the first signal line. The display device as described in Item 1 of the patent application, wherein each of the pixels further includes: an insulating layer disposed between the first auxiliary electrode and the first signal line. The display device as described in Item 1 of the patent application range, wherein there is a gap between any two adjacent first auxiliary electrodes, and the gap at least partially overlaps the pixel electrode. The display device according to item 1 of the patent application scope further includes: a first flexible circuit board having an electrode, wherein the electrode is electrically connected to the first auxiliary of the at least one pixel through the first conductive pattern Electrodes and the first signal line. The display device according to item 1 of the patent application scope, wherein the pixel electrode further has a plurality of third branch portions, the third branch portions define a third alignment area, the alignment direction of the first alignment area, the The alignment direction of the second alignment area and the alignment direction of the third alignment area are different from each other. There is a second junction area between the first alignment area and the third alignment area, and each pixel further includes: A second signal line is interleaved with the first signal line and electrically connected to the thin film transistor; and a second auxiliary electrode is disposed on the second junction area and partially overlaps the second signal line. The display device as described in item 8 of the patent application range, wherein the pixel electrode further has a second trunk portion disposed in the second junction area, the second trunk portion is connected to the first branch portions and the Between the third branch portions, the second auxiliary electrode overlaps the second trunk portion. The display device as described in item 8 of the patent application range, wherein in the extending direction of the second auxiliary electrode, the second signal line has a line width, the second auxiliary electrode has a length, and the second auxiliary electrode has a length The length is greater than the line width of the second signal line. The display device as described in item 8 of the patent application range, wherein the first auxiliary electrode is separated from the second auxiliary electrode. The display device as described in item 8 of the patent application range, wherein the second auxiliary electrode is floating. The display device as described in item 8 of the patent application range, wherein the second auxiliary electrode is electrically connected to the second signal line. The display device as described in item 1 of the patent application scope further includes: a second substrate disposed opposite to the first substrate; a sealant disposed between the first substrate and the second substrate, and Located on the first signal line and the first auxiliary electrode; and A display medium is disposed between the first substrate and the second substrate. A display device includes: a first substrate; and a plurality of pixels, disposed on the first substrate, each pixel includes: a first signal line; a thin film transistor, electrically connected to the first signal Line; a pixel electrode, electrically connected to the thin film transistor, and has a plurality of first branch portions and a plurality of second branch portions, the first branch portions define a first alignment area, the second sub-divisions The branch defines a second alignment zone, the alignment direction of the first alignment zone is different from the alignment direction of the second alignment zone, and there is a first junction zone between the first alignment zone and the second alignment zone; and a The first auxiliary electrode is disposed on the first boundary region, the first auxiliary electrode partially overlaps the first signal line, and the first auxiliary electrode floats; wherein any two adjacent pixels of the pixels The first auxiliary electrodes are separated from each other.

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