TWI396895B - Display panel - Google Patents

Abstract

A display panel including an active device array substrate, a color filter substrate disposed opposite to the active device array substrate, a displaying medium, a seal, and a groove is provided. The active device array substrate has a substrate, a gate insulator, and a passivation layer, wherein the gate insulator layer is disposed on the substrate, and the passivation layer covers the gate insulator. The display medium suitable for displaying an image is disposed between the active device array substrate and the color filter substrate. The seal is disposed between the active device array substrate and the color filter substrate and further surrounds the display medium. At least one groove is disposed outside the seal and apart from the seal with a first distance. The stack layer of the gate insulator and the passivation layer has a dug portion outside the seal to constitute the groove.

Description

Display panel

The present invention relates to a display device, and more particularly to a display panel.

For the rapid advancement of the multimedia society, most of them benefit from the dramatic advancement of semiconductor components and display devices. As for the display panel, a liquid crystal display (LCD) having superior characteristics such as high image quality, good space utilization efficiency, low power consumption, and no radiation has gradually become the mainstream of the market.

Generally, the display panel is composed of an active device array substrate, a liquid crystal layer, and a color filter substrate, wherein the active device array substrate is bonded to the color filter substrate by adhesion of the sealant located in the frame, and the liquid crystal The layer is sealed between the active device array substrate and the color filter substrate by a sealant. Therefore, the sealant is mainly used to stably seal the liquid crystal injected in the process between the active device array substrate and the color filter substrate. In addition, the sealant can also provide some maintenance for the cell gap. contribution. Moreover, a via is usually provided in the sealant to set an Au ball in the pass to turn on the common electrode on the active device array substrate and the common electrode on the color filter substrate.

However, in the actual use of the display panel, if the user suddenly changes the state of the use environment of the display panel, for example, a low temperature environment suddenly enters a high temperature and high humidity environment, the display panel is liable to cause condensation due to temperature difference and humidity difference. Since the distance between the two glass substrates (the active device array substrate and the color filter substrate) is similar, the moisture is easily sucked by the siphon phenomenon between the two glass substrates and comes into contact with the sealant, causing the sealant to expand and peel off. Moreover, the common electrode on the active device array substrate and the common electrode on the color filter substrate are also easily destroyed by moisture. On the other hand, when the moisture enters the metal layer of the component on the active device array substrate via the bypass, the metal layer will be corroded, causing a larger area of the sealant to peel off, and moreover, causing the liquid crystal to leak and the entire liquid crystal The display panel loses (fail).

Therefore, how to effectively prevent the liquid crystal display panel from being damaged by moisture to maintain the normal operation of the display panel in various use environments is also one of the problems to be overcome by the industry.

The invention provides a display panel which can effectively prevent damage of the display panel by moisture.

The invention provides a display panel with a groove for guiding moisture to effectively prevent damage of the display panel by moisture.

The invention provides a display panel comprising an active device array substrate, a color filter substrate, a display medium, a sealant and at least one trench. The active device array substrate has a substrate, a gate insulating layer and a protective layer, wherein the gate insulating layer is on the substrate, and the protective layer covers the gate insulating layer. The color filter substrate is opposed to the active device array substrate. The display medium is located between the active device array substrate and the color filter substrate for displaying an image. The sealant is disposed between the active device array substrate and the color filter substrate and surrounds the display medium. The at least one groove is disposed on the periphery of the sealant and separated from the sealant by a first distance, and the laminated layer of the gate insulating layer and the protective layer has a hollowed out portion at the periphery of the sealant to form a groove.

In an embodiment of the present invention, the active device array substrate includes a plurality of active components, and the active device array is arranged on the substrate. Each active device has a gate, a channel layer, a source, and a drain. The insulating layer is between the gate and the channel layer, and the protective layer covers the active component.

In an embodiment of the invention, the sealant is disposed on the laminate formed by the gate insulating layer and the protective layer, and the laminate formed by the gate insulating layer and the protective layer extends outward from the sealant and is bonded to the sealant. A trench having a common exposed substrate at a first distance apart.

In an embodiment of the invention, the color filter substrate has a black matrix layer, and the sealant is sandwiched between the black matrix layer and the gate insulating layer and the protective layer.

In an embodiment of the invention, the trench is substantially located at a periphery of the substrate, and the trench is spaced apart from the edge of the color filter substrate by a second distance.

In an embodiment of the invention, the trench has a flow-out opening toward the edge of the color filter substrate.

In an embodiment of the invention, the above-mentioned flow guiding outlet is located at a corner of the display panel.

In an embodiment of the invention, the color filter substrate has a flow guiding outlet located at a corner of the display panel.

In an embodiment of the invention, the number of the grooves is plural, and the grooves are separated from each other and arranged from one side of the adjacent sealant to the outside.

In an embodiment of the invention, the color filter substrate has a plurality of barrier wall structures, and the barrier wall structures are separated from each other and arranged from one side of the adjacent sealant to the outside, and each of the barrier wall structures is inserted into each of the grooves.

In an embodiment of the invention, the above-described barrier wall structure comprises a spacer, a black matrix, a filter layer or a laminate of any combination thereof.

The invention provides a display panel comprising an active device array substrate, a color filter substrate, a display medium, a sealant and at least one trench. The color filter substrate is opposed to the active device array substrate, and the color filter substrate has a plurality of spacer patterns. The display medium is located between the active device array substrate and the color filter substrate for displaying an image. The sealant is disposed between the active device array substrate and the color filter substrate and surrounds the display medium. At least one groove is disposed at a periphery of the sealant and separated from the sealant by a first distance, and the groove is formed by a space between the spacer patterns.

In an embodiment of the invention, the trench has a flow-out opening toward the edge of the color filter substrate.

The invention further provides a display panel comprising an active device array substrate, a color filter substrate, a display medium, a sealant and at least one trench. The active device array substrate has a substrate, a gate insulating layer and a protective layer, wherein the gate insulating layer is on the substrate, and the protective layer covers the gate insulating layer. The color filter substrate is opposed to the active device array substrate. The display medium is located between the active device array substrate and the color filter substrate for displaying an image. The sealant surrounds the display medium and connects the active device array substrate and the color filter substrate, wherein the sealant has at least one side comprising a plurality of common electrode conductive points. The trench is disposed on the periphery of the sealant and is separated from the side sealant having the common electrode conduction point by a first distance, and the laminated layer of the gate insulating layer and the protective layer has a hollowed out portion at the periphery of the sealant to form a trench.

Based on the above, the display panel of the present invention has a groove located on the periphery of the sealant, and can use the groove as a buffer space for moisture or use a groove as a moisture guide when the display panel changes environment. The passage or the groove is used to form a partition wall for isolating moisture, so that the conventional display panel may be peeled off due to moisture infiltration and contact with the frame glue, causing peeling of the frame rubber and corrosion of the metal layer, thereby causing the entire display panel to be lost. The problem of function.

The above described features and advantages of the present invention will be more apparent from the following description.

First embodiment

1A and 1B are respectively a top view and a cross-sectional view of a display panel according to a first embodiment of the present invention, wherein Fig. 1B is a cross-sectional view taken along line BB' of Fig. 1A. Referring to FIG. 1A and FIG. 1B , the display panel 200 includes an active device array substrate 210 , a color filter substrate 220 , a display medium 230 , a sealant 240 , and at least one trench 250 . The active device array substrate 210 has a substrate 202, a gate insulating layer 212, and a protective layer 214. The gate insulating layer 212 is disposed on the substrate 202, and the protective layer 214 covers the gate insulating layer 212. In addition, the color filter substrate 220 is opposite to the active device array substrate 210, and the display medium 230 is located between the active device array substrate 210 and the color filter substrate 220. The sealant 240 is disposed between the active device array substrate 210 and the color filter substrate 220 and surrounds the display medium 230. In particular, as shown in FIG. 1A and FIG. 1B, the display panel 200 is disposed on the periphery of the sealant 240 at least one trench 250 and separated from the sealant 240 by a first distance S1, and the gate insulating layer 212 and the protective layer 214 are stacked. The layer has a hollowed out portion at the periphery of the sealant 240 to form the groove 250.

Further, the display medium 230 is mainly used to display an image in the display area of the display panel 200. For example, the display medium 230 is, for example, a liquid crystal layer. The liquid crystal molecules in the liquid crystal layer are tilted to different degrees according to the voltage difference between the active device array substrate 210 and the color filter substrate 220, so that the display panel 200 is in the display area. Different gray levels are displayed in the middle to display the image.

As shown in FIG. 1B, the active device array substrate 210 includes a plurality of active devices 216. The active devices 216 are arrayed on the substrate 202. Each active device 216 has a gate 216G, a channel layer 216C, a source 216S, and a stack. The pole 216D, the gate insulating layer 212 is located between the gate 216G and the channel layer 216C, and the protective layer 214 covers the active component 216. In other words, the trench 250 outside the sealant 240 is formed using a gate insulating layer 212 between the gate 216G of the active device 216 and the via layer 216C and a protective layer 214 overlying the active device 216. In more detail, the color filter substrate 220 of the present embodiment has a black matrix layer 222, and the sealant 240 is interposed between the black matrix layer 222 and the gate insulating layer 212 and the protective layer 214. As shown in FIG. 1B, the stack of the gate insulating layer 212 and the protective layer 214 extends outwardly from the sealant 240 and has a trench 250 that exposes the substrate at a first distance S1 from the sealant 240.

It is to be noted that the trenches 250 in the display panel 200 of the present embodiment are formed by the gate insulating layer 212 of the active device array substrate 210 and the protective layer 214. In practice, in the process of fabricating the active device array substrate 210, the pattern of the corresponding trench 250 is designed directly on the corresponding region of the photomask, and is directly in the gate insulating layer 212 and directly in the fabrication process of the active device array substrate 210. A patterning process is performed on the stack formed by the protective layer 214 to hollow out the gate insulating layer 212 and the protective layer 214 which are intended to form the trench 250 region, thereby forming the trench 250. Therefore, the trench 250 is designed Integrated into the original process without adding additional mask processes.

More specifically, in the present embodiment, the trench 250 is substantially disposed on the substrate of the active device array substrate 210 in the form of a side of the substrate 202 under the actual use state, and the trench 250 and the color filter The edges of the light substrate 220 are separated by a second distance S2. In the present embodiment, the trenches 250 serve as a buffer structure for moisture. When the display panel 200 is in a use environment with moisture, even if moisture is present outside, the periphery of the sealant 240 is disposed apart from the sealant 240. The groove 250 of the first distance S1 delays or reduces the contact amount of the moisture with the sealant 240, in other words, even if there is moisture in the use environment, it must pass through the second distance S2, the width of the groove 250, and the first distance S1. It is only possible for the approach to be in contact with the sealant 240, and the moisture still has to cross the groove 250 capable of capturing moisture, so that the display panel 200 can effectively reduce or delay the contact chance of the moisture with the sealant 240 and the amount of contact by the groove 250. .

Second embodiment

2A and 2B are respectively a partially enlarged top plan view and a cross-sectional view of a display panel according to a second embodiment of the present invention, wherein Fig. 2B is a cross-sectional view taken along line BB' of Fig. 2A. Referring to FIG. 2A and FIG. 2B simultaneously, the display panel 300 of the present embodiment is similar to the display panel 200 of the first embodiment, and the same members are denoted by the same reference numerals. However, the trench 250 of this embodiment further has a flow guiding outlet 252.

Specifically, as shown in FIG. 2A and FIG. 2B, in the embodiment, the trench 250 has a conducting outlet 252 at the edge 220E facing the color filter substrate 220, and the layout position of the guiding outlet 252 is located, for example. The corner of the display panel 200. Therefore, when moisture is present in the use environment of the display panel 300, the moisture can be first captured in the trench 250 and then guided to the outside through the air outlet 252 to prevent moisture from contacting the sealant 240, thereby solving the problem. It is known that the display panel 300 is peeled off due to the influence of moisture.

Similarly, the trench 250 in the display panel 300 of the present embodiment is formed by the gate insulating layer 212 of the active device array substrate 210 and the protective layer 214. In practice, in the process of fabricating the active device array substrate 210, the pattern of the corresponding trench 250 is designed directly on the corresponding region of the photomask, and is directly in the gate insulating layer 212 and directly in the fabrication process of the active device array substrate 210. A patterning process is performed on the stack formed by the protective layer 214 to hollow out the gate insulating layer 212 and the protective layer 214 which are intended to form the trench 250 region, thereby forming the trench 250. Therefore, the trench 250 is designed It is integrated into the original active device array substrate 210 process without adding an additional mask process.

It is worth mentioning that, in this embodiment, the display panel 300 is mainly provided with a flow guiding outlet 252 at the edge of the trench 250 facing the substrate to capture moisture to the trench 250 and then to the outside to avoid moisture. Contact with the sealant 240 further solves the problem that the conventional display panel 300 peels off the sealant 240 due to the influence of moisture. The designer can also separately use a groove 250 having a flow guiding outlet 252 on the periphery of the sealant 240 to achieve the effect of avoiding the phenomenon that the sealant 240 is peeled off by moisture. The present invention does not limit the need for the display panel 300. The groove 250 of the first embodiment is used.

Third embodiment

2C is a cross-sectional view of a display panel according to a third embodiment of the present invention, wherein FIG. 2C is another cross-sectional view taken along line BB' of FIG. 2A, and FIG. 2C is a portion labeled C at FIG. 1A. Enlarged image. Referring to FIG. 2A and FIG. 2C simultaneously, the display panel 400 of the present embodiment is similar to the display panel 300 of the second embodiment, and the same components are denoted by the same reference numerals. However, the trenches 250 of the present embodiment are formed by the spacer patterns 224 on the color filter substrate 220.

More specifically, as shown in FIG. 2A and FIG. 2C, in the embodiment, the color filter substrate 220 has a plurality of side-by-side spacer patterns 224 in a region around the periphery of the sealant 240, and the spacers are enclosed therebetween. At least one groove 250. The layout of the trench 250 is as shown in FIG. 2A. The trench 250 has a drain outlet 252 at the edge facing the color filter substrate 220, and the layout position of the drain outlet 252 is located, for example, at a corner of the display panel 200. Similarly, when moisture is present in the use environment of the display panel 400, the moisture can be first captured in the trench 250 and then guided to the outside through the air outlet 252 to prevent moisture from contacting the sealant 240, thereby solving the problem. It is known that the display panel 400 is peeled off due to the influence of moisture.

Similarly, the trench 250 in the display panel 400 of the present embodiment is formed using the spacer pattern 224 of the color filter substrate 220. In practice, in the process of fabricating the color filter substrate 220, the pattern corresponding to the trench 250 is directly designed on the corresponding region of the photomask, and is directly fabricated in the fabrication process of the color filter substrate 220 to form a gap. The pattern 224 is formed on both sides of the predetermined area of the trench 250 to form the trench 250. Therefore, the design of the trench 250 can be integrated into the original color filter substrate 220 process without adding an additional mask. Process.

It is worth mentioning that, in this embodiment, the display panel 400 is mainly provided with a flow guiding outlet 252 at the edge of the trench 250 facing the substrate to capture moisture to the trench 250 and then to the outside to avoid moisture. Contact with the sealant 240 to solve the problem that the conventional display panel 400 peels off the sealant 240 due to the influence of moisture. The designer can also separately use a groove 250 having a flow guiding outlet 252 on the periphery of the sealant 240 to achieve the effect of avoiding the undesirable phenomenon of the sealant 240 being peeled off by moisture.

Fourth embodiment

3A is a top view of a display panel according to a fourth embodiment of the present invention, FIG. 3B is a partial enlarged view of the active device array substrate in a portion of FIG. 3A, and FIG. 3C is a cross-sectional view taken along line BB' of FIG. Figure. Referring to FIG. 3A, FIG. 3B and FIG. 3C, the display panel 500 of the present embodiment is similar to the display panel 200 of the first embodiment, and the same components are denoted by the same reference numerals. However, the number of the grooves 250 of the present embodiment is plural, wherein the grooves 250 are separated from each other and arranged from the side adjacent to the sealant 240 to the outside. Moreover, in this embodiment, the two sides of the sealant 240 respectively include a plurality of common electrode conductive points 270, and the trenches 250 are disposed at the periphery of the sealant 240 and are separated from the sealant 240 having a common electrode conductive point 270 on one side thereof. The first distance S1.

Specifically, as shown in FIG. 3A, the active device array substrate 210 and the color filter substrate 220 are electrically connected via the common electrode conduction point 270, as shown in FIG. 3B and FIG. 3C. In the embodiment, the trench 250 is used. Arranged from the outer side of the adjacent frame to the edge of the substrate. In order to further prevent the moisture from directly contacting the sealant 240, in the embodiment, the spacer pattern 224 (shown in FIG. 2C) on the color filter substrate 220 may be selected as the barrier structure 260 to interact with the active device array. The grooves 250 on the substrate 210 are matched with each other to achieve the effect of isolating moisture. The retaining wall structure may also be a laminated structure of the spacer pattern 224 and the black matrix layer 222, or a laminated structure of the spacer pattern and the color filter layer 226 (shown in FIG. 1B). In this embodiment, the active device array substrate 210 and the color filter substrate 220 of the display panel are electrically connected via the common electrode conduction point 270. Of course, in other embodiments, the display panel may also be provided with a common electrode conduction point according to product requirements, process conditions, or frame glue type. In other words, the display panel of the present invention can turn on the common electrode conduction point in FIG. 3A. The removal is performed, and only a plurality of grooves 250 arranged from the side of the adjacent sealant 240 to the outside are disposed on the periphery of the sealant, and the invention is not limited thereto.

In detail, the barrier wall structures 260 on the color filter substrate 220 are separated from each other and arranged from the side of the adjacent sealant 240 to the outside, and each of the barrier structures 260 is correspondingly inserted into the gate insulating layer 212 and the protective layer 214. The plurality of barrier structures 260 are formed in the trenches 250 formed by lamination. The display panel 500 effectively blocks the intrusion of external moisture by the wall structure 260, and the gap between the wall structures 260 can more effectively buffer the water vapor, thereby isolating the sealant 240 from the outside. Therefore, in the present embodiment, the groove 250 serves as an auxiliary structure for reinforcing the strength of the barrier wall structure 260. Therefore, when moisture is present in the use environment of the display panel 500, the moisture can be effectively blocked outside the wall structure 260 to prevent the moisture from directly contacting the sealant 240, thereby solving the conventional display panel 500. The bad effect of peeling off the sealant 240 due to the influence of gas.

In summary, the display panel of the present invention has at least the following advantages:

(1) The present invention allows moisture to be trapped in the trench by providing a trench between the gate insulating layer and the protective layer at a distance from the periphery of the sealant. This trench can be used as a buffer space for moisture, which can reduce the humidity. The gas damages the bad phenomenon caused by the sealant, thereby improving the service life of the display panel.

(b) The present invention provides a trench by a gate insulating layer and a protective layer at a distance from the periphery of the sealant, and the trench has a flow-out opening toward the edge of the substrate, so that the captured moisture can be passed as a flow guiding channel. The groove is diverted to the outside, thereby reducing the undesirable phenomenon caused by moisture damage to the sealant, thereby improving the service life of the display panel.

(c) The present invention provides a groove by patterning a spacer on a color filter substrate at a distance from the periphery of the sealant, and the groove has a flow-out opening toward the edge of the substrate, so that the captured moisture can be passed through The groove of the flow guiding channel is drained to the outside, thereby reducing the bad phenomenon caused by moisture damage to the sealant, thereby improving the service life of the display panel.

(4) The present invention provides a trench structure by using a gate insulating layer and a protective layer at a distance from the periphery of the sealant, and uses a suitable film layer on the color filter substrate to form a barrier wall structure, thereby effectively isolating the moisture intrusion frame. The opportunity of the glue, thus reducing the damage caused by moisture damage to the sealant, thereby increasing the service life of the display panel.

(5) The manufacturing method of the trench can be integrated into the process of the color filter substrate or the active device array substrate to save production cost.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

200, 300, 400, 500. . . Display panel

202. . . Substrate

210. . . Active device array substrate

212. . . Brake insulation

214. . . The protective layer

216. . . Active component

216C. . . Channel layer

216D. . . Bungee

216G. . . Gate

216S. . . Source

220. . . Color filter substrate

222. . . Black matrix layer

224. . . Interstitial pattern

226. . . Filter layer

230. . . Display medium

240. . . Frame glue

250. . . Trench

252. . . Diversion outlet

260. . . Wall structure

270. . . Common electrode conduction point

S1. . . First distance

S2. . . Second distance

1A and 1B are respectively a top view and a cross-sectional view of a display panel according to a first embodiment of the present invention.

2A and 2B are respectively a top view and a cross-sectional view of a display panel according to a second embodiment of the present invention.

2C is a cross-sectional view showing a display panel of a third embodiment of the present invention.

Fig. 3A is a top view of a display panel of a fourth embodiment of the present invention.

3B and 3C are respectively a top view and a cross-sectional view of a display panel according to a fourth embodiment of the present invention.

200. . . Display panel

202. . . Substrate

210. . . Active device array substrate

212. . . Brake insulation

214. . . The protective layer

216. . . Active component

216C. . . Channel layer

216D. . . Bungee

216G. . . Gate

216S. . . Source

220. . . Color filter substrate

222. . . Black matrix layer

226. . . Filter layer

230. . . Display medium

240. . . Frame glue

250. . . Trench

S1. . . First distance

S2. . . Second distance

Claims (14)

A display panel comprising: an active device array substrate having a substrate, a gate insulating layer and a protective layer, wherein the gate insulating layer is on the substrate, and the protective layer covers the gate insulating layer; a color filter substrate Opposite the active device array substrate; a display medium between the active device array substrate and the color filter substrate for displaying an image; a sealant disposed on the active device array substrate and the color filter Between the substrate, and surrounding the display medium; and at least one groove disposed on the periphery of the sealant and separated from the sealant by a first distance, the brake insulating layer and the protective layer being laminated on the periphery of the sealant The hollowed out portion is formed to constitute the groove. The display panel of claim 1, wherein the active device array substrate comprises a plurality of active components, and the active component arrays are arranged on the substrate, each active component having a gate, a channel layer, and a a source and a drain, the gate insulating layer is between the gate and the channel layer, and the protective layer covers the active device. The display panel of claim 1, wherein the sealant is on the laminate formed by the gate insulating layer and the protective layer, and the gate insulating layer and the protective layer are laminated from the sealant. Extending outwardly and having the trenches that collectively expose the substrate at the first distance from the sealant. The display panel of claim 1, wherein the color filter substrate has a black matrix layer, and the sealant is sandwiched between the black matrix layer and the gate insulating layer and the protective layer. between. The display panel of claim 1, wherein the trench is substantially located at a periphery of the substrate, and the trench is spaced apart from the edge of the color filter substrate by a second distance. The display panel of claim 1, wherein the groove has a flow guiding opening at an edge facing the color filter substrate. The display panel of claim 6, wherein the flow guiding outlet is located at a corner of the display panel. The display panel of claim 6, wherein the color filter substrate has a flow guiding outlet at a corner of the display panel. The display panel of claim 1, wherein the number of the grooves is plural, and the grooves are separated from each other and arranged from the side adjacent to the sealant to the outside. The display panel of claim 9, wherein the color filter substrate has a plurality of wall structures, the wall structures are separated from each other and arranged from a side adjacent to the sealant, each of the walls A structure is inserted into each of the grooves. The display panel of claim 10, wherein the barrier structures comprise a spacer, a black matrix, a filter layer, or a laminate of any combination thereof. A display panel includes: an active device array substrate; a color filter substrate opposite to the active device array substrate, the color filter substrate has a plurality of spacer patterns; a display medium located on the active device array substrate and the Between the color filter substrates; a frame glue disposed between the active device array substrate and the color filter substrate, and surrounding the display medium; and at least one groove disposed on the periphery of the sealant and the sealant The trench is formed by the space between the spacer patterns at a first distance apart. The display panel of claim 12, wherein the groove has a flow guiding opening at an edge facing the color filter substrate. A display panel comprising: an active device array substrate having a substrate, a gate insulating layer and a protective layer, wherein the gate insulating layer is on the substrate, and the protective layer covers the gate insulating layer; a color filter substrate Opposite the active device array substrate; a display medium between the active device array substrate and the color filter substrate for displaying an image; a sealant surrounding the display medium and connecting the active device array substrate and The color filter substrate, wherein the sealant has at least one side comprising a plurality of common electrode conduction points; and at least one groove disposed at a periphery of the sealant and separated from the side sealant containing the common electrode conduction points The first distance, the laminate of the gate insulating layer and the protective layer has a hollowed out portion at the periphery of the sealant to form the trench.