CN106773390B

CN106773390B - Display panel

Info

Publication number: CN106773390B
Application number: CN201710035190.4A
Authority: CN
Inventors: 洪敏翔; 黄信玮; 戴兆钰; 黄韦凱
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2016-11-30
Filing date: 2017-01-17
Publication date: 2020-06-02
Anticipated expiration: 2037-01-17
Also published as: TWI602002B; CN106773390A; TW201821871A

Abstract

A display panel comprises a display area and at least one signal line. The display area is provided with a first side edge and a second side edge which are adjacent. The signal line extends from the outer side of the first side edge of the display area to the outer side of the second side edge of the display area. The signal line comprises a first connecting section and a plurality of first extending sections. The first connecting section is located outside the first side edge of the display area and is approximately perpendicular to the first side edge. The plurality of first extension sections are defined as a plurality of sections which are sequentially connected with each other and are used for extending the signal line from the first connecting section to the extension line of the second side edge, wherein the included angle between the extension line of the first extension section and the extension line of the first connecting section is gradually increased.

Description

Display panel

Technical Field

The invention relates to a display panel.

Background

With the rapid progress of the thin film transistor fabrication technology, the liquid crystal display has advantages of being light, thin, power-saving, and free of radiation, and is widely applied to various electronic products such as Personal Digital Assistants (PDAs), notebook computers, digital cameras, camcorders, and mobile phones. In addition, the quality of the liquid crystal display is continuously improved by actively inputting research and development and adopting large-scale production equipment.

Generally, in the fabrication process of a liquid crystal display panel, a desired pixel array (pixel array) is often formed on a lower glass substrate by a film deposition and photolithography. In order to provide the signals required in the pixel array, the related circuits, chips, elements and signal lines for providing the operating voltages are fabricated around the panel. However, in the trend of narrow frames, the signal lines can be arranged in a limited range, and may suffer from the problem that the resistance is too large, which causes too high temperature, and further causes some materials (such as the polarizer) to be burnt.

Disclosure of Invention

In some embodiments of the present invention, signal lines are designed to have a special line switching mechanism, so that the problem of excessive resistance of the signal lines can be solved while maintaining a narrow frame design.

According to some embodiments of the present invention, a display panel includes a display region and at least one signal line. The display area is provided with a first side edge and a second side edge which are adjacent. The signal line extends from the outer side of the first side edge of the display area to the outer side of the second side edge of the display area. The signal line comprises a first connecting section and a plurality of first extending sections. The first connecting section is located outside the first side edge of the display area and is approximately perpendicular to the first side edge. The plurality of first extension sections are defined as a plurality of sections which are sequentially connected with each other and are used for extending the signal line from the first connecting section to the extension line of the second side edge, wherein the included angle between the extension line of the first extension section and the extension line of the first connecting section is gradually increased.

In some embodiments of the present invention, one of the first extending sections, which is farthest from the first connecting section, is substantially parallel to the first side edge.

In some embodiments of the present invention, the display panel further includes an auxiliary signal line and an insulating layer. The insulating layer is arranged between the signal line and the auxiliary signal line, wherein the insulating layer is provided with a first through hole and a second through hole, the auxiliary signal line is electrically coupled with the signal line through the first through hole and the second through hole of the insulating layer, and the first through hole corresponds to the first connecting section of the signal line.

In some embodiments of the present invention, the second via hole of the insulating layer corresponds to a first portion of the first extending section of the signal line, which is farthest away from one of the first connecting sections.

In some embodiments of the present invention, the auxiliary signal line does not cover a second portion of the first extending segment of the signal line, which is farthest from one of the first connecting segments.

In some embodiments of the present invention, the display device further includes a passivation layer, an electrostatic discharge protection element, and a conductive line. The protective layer is arranged on the auxiliary signal line. The wire is arranged on the protective layer and connected with the second part of the first extending section, which is farthest away from one of the first connecting sections, and the electrostatic protection element.

In some embodiments of the present invention, the display panel further includes a first substrate, a second substrate, a liquid crystal layer and a sealant. The second substrate is arranged opposite to the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. The sealant is arranged between the first substrate and the second substrate and surrounds the liquid crystal layer, wherein the sealant covers the wires and the second through holes.

In some embodiments of the present invention, the display panel further includes a conductive adhesive disposed on the first connecting segment of the signal line, wherein the auxiliary signal line has an opening corresponding to the first via hole, and the conductive adhesive is filled in the opening and the first via hole.

In some embodiments of the present invention, the signal line includes a second connecting segment and a second extending segment. The second connecting section is arranged outside the second side edge of the display area and is substantially parallel to the second side edge. The second extension section is directly electrically coupled between the second connection section and the first extension section.

In some embodiments of the present invention, the display panel further includes an auxiliary signal line and an insulating layer. The insulating layer is arranged between the signal line and the auxiliary signal line, wherein the insulating layer is provided with a first through hole and a second through hole, the first through hole corresponds to the first connecting section of the signal line, the second through hole corresponds to the second connecting section of the signal line, and the auxiliary signal line is electrically coupled with the signal line through the first through hole and the second through hole of the insulating layer.

In some embodiments of the present invention, at least one side of each first extending section is a straight line.

In some embodiments of the present invention, the display panel further includes a plurality of pixel units and a source driver. The pixel unit is arranged in the display area of the substrate. The source driver is arranged at the outer side of the first side edge. The fan-out line is electrically coupled to the pixel unit to the source driver, wherein opposite sides of at least one of the first extension segments are parallel to sides of the fan-out line.

In some embodiments of the present invention, the display panel further includes a gate driver and a flexible printed circuit. The gate driver is disposed outside the second side of the display region. The flexible circuit board is arranged at the outer side of the first side edge of the display area, wherein the at least one signal line is electrically coupled between the flexible circuit board and the grid driver.

In some embodiments of the present invention, the number of the at least one signal line is plural, and the maximum width of the first extending section of the signal line closest to one of the display regions is 1.5 to 5 times the maximum width of the first extending section of the signal line next closest to one of the display regions.

According to some embodiments of the present invention, a display panel includes a display region, a plurality of pixel units, a source driver, a fan-out line, a first signal line, and a second signal line. The display area is provided with a first side edge and a second side edge which are adjacent. The pixel unit is arranged in the display area. The source driver is arranged at the outer side of the first side edge. The fan-out circuit is electrically coupled with the pixel unit to the source driver. The first signal line and the second signal line respectively extend from the outer side of the first side edge of the display area to the outer side of the second side edge of the display area. Each of the first signal lines and the second signal lines includes a first connecting section and a plurality of first extending sections. The first connecting section is located outside the first side edge of the display area and is approximately perpendicular to the first side edge. The first extension section is defined as a plurality of sequentially connected sections of extension lines extending from the first connecting section to the second side edge, wherein one of the first extension sections has a side edge substantially parallel to the fan-out line, the maximum width of the one of the first extension sections closest to the first signal line is 1.5 to 5 times the maximum width of the one of the first extension sections of the second signal line, and the first signal line is closer to the fan-out line than the second signal line.

In some embodiments of the present invention, one of the first extending sections, which is farthest from the first connecting section, is substantially parallel to the first side.

In some embodiments of the present invention, the display panel further includes an insulating layer and at least one auxiliary signal line. The insulating layer covers the first signal line and the second signal line. The auxiliary signal line is disposed on the insulating layer and located on one of the first signal line and the second signal line, wherein the insulating layer has a first via and a second via, the auxiliary signal line is electrically coupled to the one of the first signal line and the second signal line through the first via and the second via of the insulating layer, and the first via corresponds to the first connection section of the one of the first signal line and the second signal line.

In some embodiments of the present invention, the second via hole of the insulating layer corresponds to the first extending section of the one of the first signal line and the second signal line.

In some embodiments of the present invention, each of the first signal line and the second signal line includes a second connecting segment and a second extending segment. The second connecting segment is substantially parallel to the second side edge. The second extension section is directly electrically coupled between the second connection section and the first extension section.

In some embodiments of the present invention, the second via hole of the insulating layer corresponds to the second connection segment of the one of the first signal line and the second signal line.

In some embodiments of the present invention, the display panel further includes a gate driver and a flexible printed circuit. The gate driver is disposed outside the second side of the display region. The flexible circuit board is arranged at the outer side of the first side edge of the display area, wherein the first signal wire and the second signal wire are respectively and electrically coupled between the flexible circuit board and the grid driver.

Drawings

Fig. 1 is a schematic top view of the display panel of fig. 6 according to a portion of the embodiment of the invention in fig. 6.

Fig. 2 is a schematic top view of signal lines of the display panel of fig. 6 according to a portion of the embodiment of the invention in fig. 6.

FIG. 3 is a cross-sectional view taken along line 3A-3B and line 3B-3C of FIG. 2 and FIG. 6.

Fig. 4 is a partially enlarged top view of the display panel of fig. 1 and 6.

Fig. 5 is a schematic top view illustrating signal lines of the display panel of fig. 6 according to another embodiment of the invention in fig. 6.

FIG. 6 is a schematic top view of the display panel of FIG. 6 according to still another embodiment of the invention.

Wherein, the reference numbers:

100: display panel

110: first substrate

120: pixel

132: source driver

134: source fan-out circuit

134-1 to 134-n: fan-out conductor

136: source electrode fan-in circuit

142: gate driver

144: grid fan-out circuit

146: grid input circuit

150: signal line

150-1 to 150-n: signal line

150A: auxiliary signal line

152: first connecting section

154: first extension section

154-1: first extension section

154-2: first extension section

154-Z: first extension section

156: second extension section

156-1: second extension section

156-Z: second extension section

158: second connecting section

160: flexible circuit board

162: bonding pad

170: insulating layer

172: first through hole

174: second through hole

180: protective layer

190: electrostatic protection element

200: conducting wire

210: conductive adhesive

220: second substrate

240: sealing compound

300: circuit board

DA: display area

DL: data line

SL: scanning line

S1: the first side edge

S2: second side edge

P1: the first part

P2: the second part

W1: maximum width

W2: maximum width

Aa: included angle

Ab: included angle

Az: included angle

Ba: included angle

Bz: included angle

LS: light shielding layer

EL 1: extension line

EL 2: extension line

EL 2': extension line

3A-3B: thread

3B-3C: thread

P4: local part

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and elements are shown in simplified schematic form in the drawings.

Fig. 1 is a schematic top view of a display panel 100 according to some embodiments of the present invention. The display panel 100 includes a first substrate 110, a plurality of pixels 120, data lines DL, scan lines SL, a source driver 132, a source fan-out line 134, a source fan-in line 136, a gate driver 142, a gate fan-out line 144, a gate input line 146, at least one signal line 150, and a flexible circuit board 160. The first substrate 110 has a display area DA, and the pixels 120, the data lines DL and the scan lines SL are disposed in the display area DA of the first substrate 110, wherein the data lines DL and the scan lines SL are mutually crossed and electrically coupled to the pixels 120. The display area DA has two adjacent first side edges S1 and second side edges S2. In various embodiments of the present invention, the source driver 132 is located outside the first side S1 of the display area DA, the gate driver 142 is located outside the second side S2 of the display area DA, the source driver 132 is electrically coupled to the data lines DL via the source fan-out lines 134, and the gate driver 142 is electrically coupled to the scan lines SL via the gate fan-out lines 144, such that the source driver 132 and the gate driver 142 are electrically coupled to the pixels 120.

In various embodiments of the present invention, the flexible circuit board 160 is located outside the first side S1 of the display area DA, the source driver 132 is electrically coupled to the flexible circuit board 160 through the source fan-in circuit 136, and the gate driver 142 is connected to the flexible circuit board 160 through the signal line 150 and the gate input circuit 146. Specifically, the signal line 150 extends from the outside of the first side S1 of the display area DA to the outside of the second side S2 of the display area DA, such that the signal line 150 is electrically coupled between the gate input line 146 and the flexible circuit board 160.

Fig. 2 is a schematic top view of a signal line 150 of the display panel 100 according to some embodiments of the present invention. Referring to fig. 1 and fig. 2, in various embodiments of the present invention, the signal line 150 includes a first connecting segment 152, a plurality of first extending segments 154, a second extending segment 156, and a second connecting segment 158. The first connecting segment 152 is located at the outer side of the first side edge S1 of the display area DA and is substantially perpendicular to the first side edge S1. In some embodiments, at least a portion of the first connecting segment 152 is used as a bonding pad and is disposed corresponding to the flexible circuit board 160. The first extending sections 154 are electrically coupled to the first connecting sections 152. The first extension portions 154 can be divided into first extension portions 154-1 and 154-Z, and the first extension portions 154-1 and 154-Z are defined as a plurality of sequentially connected sections of the extension line EL1 extending from the first connection portion 152 to the second side S2 of the signal line 150. For example, in the present embodiment, one end of the first extending segment 154-1 is connected to the first connecting segment 152, the other end of the first extending segment 154-1 is connected to the first extending segment 154-Z, and the first extending segment 154-Z is adjacent to the extending line EL1 of the second side edge S2, where the first extending segment 154-Z overlaps with the extending line EL1 of the second side edge S2. The second connecting segment 158 is disposed outside the second side edge S2 of the display area DA and substantially parallel to the second side edge S2. The second extension 156 is electrically coupled (directly) between the second connection 158 and the first extension 154.

In various embodiments of the present invention, the extension line of each of the first extension segments 154-1 and 154-Z and the extension line EL2 of the first connection segment 152 have an included angle, which becomes larger as the distance from the first connection segment 152 increases. For example, the extension line of the first extension segment 154-1 has an angle Aa with the extension line EL2 of the first connection segment 152, and the extension line of the first extension segment 154-Z has an angle Az with the extension line EL2 of the first connection segment 152. The included angle gradually increases from the adjacent first connection section 152 to the far away first connection section 152, for example, the included angle Aa and the included angle Az sequentially increase. Thus, the purpose of wire-turning can be achieved in a limited space while maintaining the width of the first extension 154 of the signal wire 150 as much as possible. In other words, in certain embodiments, the first extension 154 before the second extension 156 extends in a certain clockwise or counterclockwise direction, but does not extend in both directions, thereby reducing the possibility of over-impedance.

In some embodiments, the first extension 154-Z is substantially parallel to the first side S1 such that the included angle Az is 90 degrees. Here, the first extension 154-Z is the first extension 154 farthest from the first connection section 152. In other words, the first extending section 154 farthest from the first connecting section 152 is substantially parallel to the first side edge S1. Thus, the signal line 150 can be turned from a vertical direction to a parallel direction, which is advantageous for etching a mask to facilitate patterning during the formation of the signal line 150.

On the other hand, the included angle Ba between the extension line of the second extension segment 156 and the extension line EL2 of the first extension segment 154 is smaller than the included angle Az between the extension line of the first extension segment 154-Z and the extension line EL2 of the first extension segment 154. An extension line EL2 'is shown to specifically indicate the range of the included angle Ba, wherein the extension line EL 2' is parallel to the extension line EL 2. In this way, the purpose of wire diversion can be achieved in a limited space while maintaining the width of the second extension section 156 of the signal wire 150 as much as possible. At this point, the signal lines 150 may be turned from the parallel direction to the vertical direction to electrically couple to the gate driver 142.

In some embodiments, at least one side of each first extension 154 (e.g., first extension 154-1, first extension 154-Z) is a straight line, such that the first extension 154 is a segmented rotation line as a whole. Although only two first extensions 154-1, 154-Z are illustrated herein, the scope of the present invention should not be limited thereby, and in other embodiments, more than three first extensions may be provided. Similarly, in some embodiments, at least one side of each second extension 156 is a straight line, so that the second extension 156 is a clearly-divided line. Although only a single second extension 156 is illustrated herein, it should not be construed as limiting the scope of the present invention, and in other embodiments, more than two second extensions may be provided, as will be described in more detail below. It should be understood that the scope of the present invention should not be limited by the straight sides, and in other embodiments, the first extension 154 and/or the second extension 156 may be curved.

In various embodiments of the present invention, the display panel 100 may include a light-shielding layer LS (refer to fig. 3) disposed on the first substrate 110 to define the display area DA. Specifically, the light-shielding layer LS may have an opening to expose the display area DA and shield the area outside the display area DA, and the first side S1 and the second side S2 are sides of the light-shielding layer LS (e.g., edges of the opening of the light-shielding layer LS) when viewed from the drawing directions of fig. 1 and fig. 2. As seen from the plane of fig. 1 and 2, the extended line of the first side S1 and the extended line EL1 of the second side S2 can divide the display panel 100 into four quadrants, where "the outer side of the first side S1 of the display area DA" refers to the first quadrant, "the outer side of the second side S2 of the display area DA" refers to the third quadrant, and "the display area DA" refers to the fourth quadrant.

Fig. 3 is a schematic cross-sectional view taken along line 3A-3B and line 3B-3C of fig. 2. Reference is also made to fig. 2 and 3. In some embodiments, the display panel 100 further includes an auxiliary signal line 150A and an insulating layer 170. The insulating layer 170 is disposed between the signal line 150 and the auxiliary signal line 150A, and has a thickness of about 2000 to 6000 angstroms, such as about 4000 angstroms. The auxiliary signal line 150A is disposed on the signal line 150, and in the present embodiment, the first extension 154-Z of the signal line 150 has a first portion P1 covered by the auxiliary signal line 150A and a second portion P2 not covered by the auxiliary signal line 150A. In some embodiments, the insulating layer 170 has a first via 172 and a second via 174, the first via 172 corresponds to the first connection segment 152 of the signal line 150, and the second via 174 corresponds to the first portion P1 of the first extension 154-Z of the signal line 150. Herein, the display panel 100 further includes a conductive adhesive 210 disposed on the first connecting segment 152 of the signal line 150, and the conductive adhesive 210 is filled in the second via 174, so that the auxiliary signal line 150A is electrically coupled to the signal line 150 through the first via 172 and the second via 174 of the insulating layer 170. In this way, although the width of the first extension 154 of the signal line 150 is relatively narrow, the auxiliary signal line 150A can reduce the resistance of signal transmission, which is equivalent to increasing the sectional area of the signal transmission path, and avoid the situation that high temperature is easily generated due to too high resistance.

Herein, the auxiliary signal line 150A has an opening 150B corresponding to the first via 172 of the insulating layer 170, and the conductive paste 210 is filled in the opening 150B and the first via 172. The flexible circuit board 160 has a bonding pad 162. Thus, the bonding pad 162 of the flexible circuit board 160 is electrically coupled to the signal line 150 and the auxiliary signal line 150A through the conductive adhesive 210. As a result, the components on the circuit board 300 (refer to fig. 1) can be electrically coupled to the components on the substrate 110 through the flexible circuit board 160.

In some embodiments of the present invention, the display panel 100 further includes a passivation layer 180, an electrostatic discharge protection device 190, and a conductive line 200. The passivation layer 180 is disposed on the signal line 150 and the auxiliary signal line 150A, and has a thickness of about 1000 to 4000 angstroms, such as about 2000 angstroms or 3000 angstroms. The esd protection device 190 may be disposed between the insulating layer 170 and the protection layer 180 or on the protection layer 180. For example, the electrostatic discharge protection device 190 may be a diode, a capacitor, or a combination thereof. The conductive line 200 is disposed on the passivation layer 180 and connects the second portion P2 of the first extension segment 154-Z and the esd protection device 190.

As mentioned above, the auxiliary signal line 150A does not cover the second portion P2 of the first extension segment 154-Z, thereby leaving the second portion P2 of the first extension segment 154-Z for the connection of the conductive line 200, so that the signal line 150 is electrically coupled to the esd protection device 190 through the conductive line 200. As such, the insulating layer 170 and the protective layer 180 are disposed between the conductive line 200 and the signal line 150, and referring to fig. 1 to 3, when a plurality of signal lines 150 and the conductive lines 200 thereof are disposed, cross interference (crosstalk) between the conductive lines 200 crossing the signal lines 150 and the signal lines 150 can be avoided. Here, in order to effectively avoid the cross interference, a double-layer design (the insulating layer 170 and the protective layer 180) is adopted between the conductive line 200 and the signal line 150. In other embodiments, if the thickness of the insulating layer 170 is sufficient to resist the above-mentioned crosstalk, it may not be necessary to design the protection layer 180 between the conductive line 200 and the signal line 150.

Fig. 4 is a top view enlarged schematic diagram of a part P4 of the display panel 100 of fig. 1. The plurality of signal lines 150 may be divided into signal lines 150-1 to 150-n, and the plurality of first extension portions 154 may be divided into first extension portions 154-1 and 154-2. One of the first extensions 154 of each of the signal lines 150-1-150-n (here, the first extension 154-1) has a side substantially parallel to the source fan-out line 134. Specifically, as shown, the source fan-out line 134 includes a plurality of fan-out wires 134-1-134-n, and at least one side of the first extension 154-1 is parallel to a side of the fan-out wire 134-1. In various embodiments of the present invention, the maximum width of the first extension 154-1 of the signal lines 150-1 to 150-n is not greatly different. For example, the maximum width W1 of the first extension 154-1 of the signal line 150-1 is 1.5 to 5 times the maximum width W2 of the first extension 154-1 of the signal line 150-2. Furthermore, the maximum width W1 of the first extension 154-1 of the signal line 150-1 is 1.5 to 3 times or 2 to 3 times the maximum width W2 of the first extension 154-1 of the signal line 150-2. Here, the signal line 150-1 is closer to the source fan-out line 134 than the signal line 150-2, for example, the signal line 150-1 is one of the signal lines 150 closest to the display area DA, and the signal line 150-2 is one of the signal lines 150 next to the display area DA. Herein, the signal line 150-1 may be a power line, such as a COM power line for providing a ground potential, and the signal line 150-2 may provide a timing signal to time-sequentially control the gate driver 142 to output a scan signal. In other embodiments, the maximum width W1 of the first extension 154-1 of the signal line 150-1 can be 1.5 to 5 times the maximum width of the first extension 154-1 of one of the signal lines 150-3-150-n.

In some embodiments, opposite sides of at least one of the first extension segments 154 are parallel to sides of the source fan-out line 134. As shown, the source fan-out line 134 includes a plurality of fan-out lines 134-1 ~ 134-n, and opposite sides of the first extension 154-1 of the signal line 150-2 are parallel to the sides of the fan-out line 134-1.

By the configuration, the widths of the signal lines 150-1-150-n are relatively even, and the problem that the widths of some signal lines 150-1-150-n are too small and the resistance is too high is avoided.

Referring back to fig. 3, in some embodiments of the invention, the display panel 100 further includes a second substrate 220, a liquid crystal layer (not shown), and a sealant 240. The second substrate 220 is disposed opposite to the first substrate 110. The liquid crystal layer (not shown) is disposed between the first substrate 110 and the second substrate 220. The sealant 240 is disposed between the first substrate 110 and the second substrate 220 and surrounds the liquid crystal layer (not shown), wherein the sealant 240 covers the wires 200 and the second through holes 174 to prevent dust or corrosion from affecting the electrical properties thereof. Herein, the sealant 240 is located outside the display area DA, and the liquid crystal layer (not shown) is located at least in the area inside the display area DA. In this way, the sealant 240 can completely fill the region outside the display area DA, and the liquid crystal layer is limited in the display area DA. Of course, the scope of the invention should not be limited thereto, and in other embodiments, the liquid crystal layer may be located outside the display area DA, i.e. in the area of the sealant 240.

In various embodiments of the present invention, the first substrate 110 is, for example, a thin film transistor substrate, the second substrate 220 is a color filter substrate, and the light shielding layer LS is disposed on the second substrate 220, but not limited thereto. In other embodiments, the first substrate 110 may also be a color filter on array (COA) substrate or a black matrix on array (BOA) substrate.

In some embodiments of the present invention, the signal line is designed to have a special line-switching mechanism, so that the problem of excessive resistance of the signal line can be solved while maintaining the design of the narrow frame. It should be understood that the number or slope distribution of the pixels 120, the wires of the gate fan-out lines 144, the wires of the gate input lines 146, the wires of the source fan-in lines 136, the wires of the source fan-out lines 134 (such as the fan-out wires 134-1-134-n), the signal lines 150, etc. in the drawings of the present invention are merely illustrative and should not be construed as limiting the scope of the present invention.

Fig. 5 is a schematic top view of a signal line 150 of a display panel 100 according to another embodiment of the invention. This embodiment is similar to the embodiment of fig. 2 described above, with the difference that: in the present embodiment, the auxiliary signal line 150A covers the first connection segment 152, the first extension segment 154, the second extension segment 156, and the second connection segment 158 of the signal line 150, and the second via 174 of the insulating layer 170 corresponds to the second connection segment 158 of the signal line 150.

In the present embodiment, the conductive line 200 connected to the signal line 150 and the esd protection device 190 (refer to fig. 2 and 3) may not be provided. Alternatively, the esd protection device 190 may be configured in other suitable manners to electrically couple to the signal line 150.

In this way, although the widths of the first extension 154 and the second extension 156 of the signal line 150 are relatively narrow, the auxiliary signal line 150A can reduce the resistance of signal transmission, which is equivalent to increasing the sectional area of the signal transmission path, and avoid the situation that high temperature is easily generated due to too high resistance.

Other details of this embodiment are as described in the embodiment of fig. 1, and are not described herein again.

Fig. 6 is a schematic top view of a display panel 100 according to still another embodiment of the invention. This embodiment is similar to the previously described embodiment of fig. 1, with the difference that: in the present embodiment, the first extension 154 includes first extensions 154-1, 154-2, 154-Z, and the second extension 156 includes second extensions 156-1, 156-Z.

In some embodiments of the present invention, one end of the first extension 154-1 is connected to the first connection section 152, the other end of the first extension 154-1 is connected to the first extension 154-2, and the end of the first extension 154-2 away from the first extension 154-1 is connected to the first extension 154-Z.

As mentioned above, the extending line of each first extending segment 154 and the extending line EL2 of the first connecting segment 152 have an included angle, which becomes larger as the distance from the first connecting segment 152 increases. For example, the extension line of the first extension segment 154-1 has an angle Aa with the extension line EL2 of the first connection segment 152, the extension line of the first extension segment 154-2 has an angle Ab with the extension line EL2 of the first connection segment 152, and the extension line of the first extension segment 154-Z has an angle Az with the extension line EL2 of the first connection segment 152. The included angle gradually increases from the adjacent first connection section 152 to the far away first connection section 152, for example, the included angle Aa, the included angle Ab and the included angle Az sequentially increase. Thus, the purpose of wire-transferring can be achieved in a limited space while maintaining the width of the signal wire 150 as much as possible.

In some embodiments of the present invention, the second extension sections 156-1 and 156-Z are defined as a plurality of sequentially connected sections of the signal line 150 extending from the first extension section 154 to connect to the second connection section 158. For example, one end of the second extension 156-1 is connected to the first extension 154, and the other end of the second extension 156-1 is connected to the second extension 156-Z.

In various embodiments of the present invention, the extending line of each second extending segment 156 and the extending line EL2 of the first connecting segment 152 have an included angle, and the included angle gradually decreases with distance from the first connecting segment 152. For example, the extension line of the second extension segment 156-1 has an angle Ba with the extension line EL2 of the first connection segment 152, and the extension line of the second extension segment 156-Z has an angle Bz with the extension line EL2 of the first connection segment 152. The included angle gradually decreases from the adjacent first connection section 152 to the far away first connection section 152, for example, the included angle Bz is smaller than the included angle Ba. Thus, the purpose of wire-transferring can be achieved in a limited space while maintaining the width of the signal wire 150 as much as possible.

In this document, the extension lines (e.g., the extension line EL2 of the first connecting section 152, the extension line of the first extension section 154, and the extension line of the second extension section) refer to the middle lines of the two opposite sides of the element. The angles (e.g., angles Aa, Ab, Az, Ba, Bz) are the angles of rotation of the front and rear ends of the elements relative to the front and rear ends of the signal line 150 (i.e., the first connecting section 152).

In some embodiments of the present invention, the signal line is designed to have a special line-switching mechanism, so that the problem of excessive resistance of the signal line can be solved while maintaining the narrow frame design.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A display panel, comprising:

a display area having a first side and a second side adjacent to each other; and

at least one signal line extending from an outer side of the first side of the display area to an outer side of the second side of the display area, wherein the signal line comprises:

the first connecting section is positioned outside the first side edge of the display area and is approximately vertical to the first side edge; and

the plurality of first extension sections are defined as a plurality of sequentially connected sections of the extension line of the signal line extending from the first connecting section to the second side, wherein the included angle between the extension line of the first extension sections and the extension line of the first connecting section is gradually increased.

2. The display panel of claim 1, wherein one of the first extending segments farthest from the first connecting segment is parallel to the first side edge.

3. The display panel of claim 1, further comprising:

an auxiliary signal line; and

the insulating layer is arranged between the signal line and the auxiliary signal line and is provided with a first through hole and a second through hole, the auxiliary signal line is electrically coupled with the signal line through the first through hole and the second through hole of the insulating layer, and the first through hole corresponds to the first connecting section of the signal line.

4. The display panel according to claim 3, wherein the second via hole of the insulating layer corresponds to a first portion of the first extending section of the signal line farthest from one of the first connecting sections.

5. The display panel according to claim 3 or 4, wherein the auxiliary signal line does not cover a second portion of the first extending segments of the signal line farthest from one of the first connecting segments.

6. The display panel of claim 5, further comprising:

a protective layer disposed on the auxiliary signal line;

an electrostatic protection device; and

and a wire arranged on the protective layer and connected with the second part of one of the first extending sections, which is farthest from the first connecting section, and the electrostatic protection element.

7. The display panel of claim 6, further comprising:

a first substrate;

a second substrate disposed opposite to the first substrate;

a liquid crystal layer arranged between the first substrate and the second substrate; and

and a sealant disposed between the first substrate and the second substrate and surrounding the liquid crystal layer, the sealant covering the wires and the second through holes.

8. The display panel of claim 3, further comprising:

and the conductive adhesive is arranged on the first connecting section of the signal line, the auxiliary signal line is provided with an opening corresponding to the first through hole, and the conductive adhesive is filled in the opening and the first through hole.

9. The display panel of claim 1, wherein the signal line comprises:

the second connecting section is arranged on the outer side of the second side edge of the display area and is parallel to the second side edge; and

and the second extending sections are directly and electrically coupled between the second connecting sections and the first extending sections.

10. The display panel of claim 9, further comprising:

an auxiliary signal line; and

the insulating layer is arranged between the signal line and the auxiliary signal line and is provided with a first through hole and a second through hole, the first through hole corresponds to the first connecting section of the signal line, the second through hole corresponds to the second connecting section of the signal line, and the auxiliary signal line is electrically coupled with the signal line through the first through hole and the second through hole of the insulating layer.

11. The display panel of claim 1, wherein at least one side of each of the first extending segments is a straight line.

12. The display panel of claim 1, further comprising:

a plurality of pixel units arranged in the display area;

a source driver disposed outside the first side; and

and the fan-out line is electrically coupled with the pixel units to the source driver, and the opposite two sides of at least one of the first extension sections are parallel to the sides of the fan-out line.

13. The display panel of claim 1, further comprising:

a gate driver disposed outside the second side of the display region; and

and the flexible circuit board is arranged at the outer side of the first side edge of the display area, and the at least one signal line is electrically coupled between the flexible circuit board and the grid driver.

14. The display panel according to claim 1, wherein the number of the at least one signal line is plural, and a maximum width of the first extending segments of the signal lines closest to one of the display regions is 1.5 to 5 times a maximum width of the first extending segments of the signal lines next closest to one of the display regions.

15. A display panel, comprising:

a display area having a first side and a second side adjacent to each other;

a plurality of pixel units arranged in the display area;

a source driver disposed outside the first side;

a fan-out circuit electrically coupling the pixel units to the source driver;

and

a first signal line and a second signal line respectively extending from an outer side of the first side of the display area to an outer side of the second side of the display area, wherein each of the first signal line and the second signal line comprises:

a plurality of first extension segments defined as a plurality of sequentially connected segments of extension lines extending from the first connection segment to the second side, one of the first extension segments having a side parallel to the fan-out line, wherein a maximum width of the one of the first extension segments of the first signal line is 1.5 to 5 times a maximum width of the one of the first extension segments of the second signal line, wherein the first signal line is closer to the fan-out line than the second signal line;

wherein, the extending line from the first connecting section to the second side edge has a gradually increased included angle with the extending line of the first connecting section.

16. The display panel of claim 15, wherein one of the first extending segments farthest from the first connecting segment is parallel to the first side edge.

17. The display panel of claim 15, further comprising:

an insulating layer covering the first signal line and the second signal line; and

at least one auxiliary signal line disposed on the insulating layer and located on at least one of the first signal line and the second signal line, wherein the insulating layer has a first via and a second via, the auxiliary signal line is electrically coupled to the one of the first signal line and the second signal line through the first via and the second via of the insulating layer, and the first via corresponds to the first connection segment of the one of the first signal line and the second signal line.

18. The display panel according to claim 17, wherein the second via hole of the insulating layer corresponds to the first extending sections of the one of the first signal line and the second signal line.

19. The display panel of claim 17, wherein each of the first signal lines and the second signal lines comprises:

a second connecting section parallel to the second side edge; and

and the second extension section is directly and electrically coupled between the second connecting section and the first extension sections.

20. The display panel of claim 19, wherein the second via of the insulating layer corresponds to the second connection segment of the one of the first signal line and the second signal line.

21. The display panel of claim 15, further comprising:

a gate driver disposed outside the second side of the display region; and

the first signal line and the second signal line are electrically coupled between the flexible circuit board and the grid driver.