CN112859457A

CN112859457A - Display panel

Info

Publication number: CN112859457A
Application number: CN202110308059.7A
Authority: CN
Inventors: 詹富为; 林雅慧; 陈冠勋
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2020-09-23
Filing date: 2021-03-23
Publication date: 2021-05-28
Anticipated expiration: 2041-03-23
Also published as: TW202212934A; CN112859457B; TWI730903B

Abstract

A display panel comprises a first substrate, a plurality of pixel structures, a second substrate, a display medium, a first sealant, at least one filter pattern and a second sealant. The first substrate has an active region and a peripheral region outside the active region. The plurality of pixel structures are arranged on the active area of the first substrate. The second substrate is arranged opposite to the first substrate. The first sealant is disposed between the first substrate and the second substrate and on the peripheral region of the first substrate. The peripheral area of the first substrate is provided with a protruding part which exceeds the second substrate, and at least one filtering pattern is arranged between the protruding part of the first substrate and the second substrate. The second sealant is disposed on the sidewall of the first substrate and the sidewall of the second substrate.

Description

Display panel

Technical Field

The present invention relates to a display panel.

Background

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

Generally, a display device may include a non-self-luminous display panel and a backlight module under the non-self-luminous display panel. In order to realize a display device with a narrow frame and prevent light beams emitted by the backlight module from leaking from the peripheral region of the non-self-luminous display panel, a side sealant (side sealant) for blocking light is formed on the side wall of the non-self-luminous display panel. However, when the upper and lower substrates of the non-self-luminous display panel are misaligned, the bonding condition between the side sealant and the sidewall of the non-self-luminous display panel is poor, resulting in side point-like light leakage.

Disclosure of Invention

The invention provides a display panel with good performance.

The display panel comprises a first substrate, a plurality of pixel structures, a second substrate, a display medium, a first sealant, at least one light filtering pattern and a second sealant. The first substrate has an active region and a peripheral region outside the active region. The plurality of pixel structures are arranged on the active area of the first substrate. The second substrate is arranged opposite to the first substrate. The first sealant is disposed between the first substrate and the second substrate and on the peripheral region of the first substrate. The peripheral area of the first substrate is provided with a protruding part which exceeds the second substrate, and at least one filtering pattern is arranged between the protruding part of the first substrate and the second substrate. The second sealant is disposed on the sidewall of the first substrate and the sidewall of the second substrate.

In an embodiment of the invention, the second encapsulant is further disposed on at least one sidewall of the at least one light filtering pattern.

In an embodiment of the invention, the sidewall of the second substrate overlaps the at least one filter pattern.

In an embodiment of the invention, the display panel further includes a light-shielding pattern layer disposed on the second substrate and between the second substrate and the display medium. The at least one light filtering pattern is overlapped with the side wall of the light shielding pattern layer, which is positioned above the peripheral area.

In an embodiment of the invention, the display panel further includes a polarizer disposed on the second substrate. The second substrate is positioned between the polarizer and the at least one light filtering pattern, and part of the second sealing glue is arranged between the polarizer and the at least one light filtering pattern.

In an embodiment of the invention, the at least one filtering pattern and the plurality of pixel structures are disposed on the same first substrate.

In an embodiment of the invention, each of the pixel structures includes an active device and a pixel electrode electrically connected to the active device. The display panel further comprises a plurality of color resistors which are respectively overlapped with the plurality of pixel electrodes of the plurality of pixel structures. The material of the at least one light filtering pattern is the same as the material of the at least one color resistor.

In an embodiment of the invention, the at least one filter pattern includes a plurality of stacked filter patterns, and colors of the plurality of filter patterns are different from each other.

In an embodiment of the invention, the display panel further includes a protection layer. The plurality of filter patterns, the protective layer and part of the second sealant are sequentially stacked on the convex part of the first substrate.

Drawings

Fig. 1 is a schematic cross-sectional view of a display panel 10 according to an embodiment of the invention.

Description of reference numerals:

1: pixel array substrate

2: opposite substrate

3: display medium

4. 5: polaroid

5-1, 110 b-1: projecting part

6: first sealant

7: second encapsulant

10: display panel

110: a first substrate

110 a: active region

110 b: peripheral zone

112. 212, and (3): outer surface

114. 132Rs, 132Bs, 144, 214, 224: side wall

120: pixel electrode

131R, 131G, 131B: color resistance

132R, 132B: light filtering pattern

140: protective layer

210: second substrate

220: light-shielding pattern layer

222: opening of the container

B: retaining wall structure

G: space(s)

g: voids

SPX: pixel structure

T: active component

Ta: first end

Tb: second end

Tc: control terminal

Td: semiconductor pattern

Detailed Description

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

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

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

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

Referring to fig. 1, a display panel 10 includes a pixel array substrate 1, an opposite substrate 2 and a display medium 3. The pixel array substrate 1 has a first substrate 110, the opposite substrate 2 has a second substrate 210, the second substrate 210 is disposed opposite to the first substrate 110, and the display medium 3 is disposed between the first substrate 110 and the second substrate 210.

For example, in the embodiment, the display medium 3 may be a non-self-luminous material (such as, but not limited to, liquid crystal), the display panel 10 may further include a polarizer 4 and a polarizer 5 respectively disposed on the outer surface 112 of the first substrate 110 and the outer surface 212 of the second substrate 210, and a backlight module (not shown) is disposed below the display panel 10.

In the embodiment, the material of the first substrate 110 may be glass, quartz, organic polymer, or other suitable materials; the material of the second substrate 210 may be glass, quartz, organic polymer, or other suitable materials.

The pixel array substrate 1 includes a first substrate 110 and a plurality of pixel structures SPX. The first substrate 110 has an active region 110a and a peripheral region 110b outside the active region 110 a. The plurality of pixel structures SPX are disposed in the active region 110a of the first substrate 110.

Each pixel structure SPX includes an active device T and a pixel electrode 120 electrically connected to the active device T. In this embodiment, the active device T may include a thin film transistor T having a control terminal Tc, a semiconductor pattern Td, and a first terminal Ta and a second terminal Tb electrically connected to two different regions of the semiconductor pattern Td, wherein the control terminal Tc of the thin film transistor is electrically connected to a corresponding one of the scan lines (not shown), the first terminal Ta of the thin film transistor is electrically connected to a corresponding one of the data lines (not shown), and the second terminal Tb of the thin film transistor is electrically connected to a corresponding one of the pixel electrodes 120.

In this embodiment, the display panel 10 may further optionally include a plurality of

color resistors

131R, 131G, and 131B respectively overlapping the plurality of pixel electrodes 120 of the plurality of pixel structures SPX. For example, in the present embodiment, the

color resistors

131R, 131G, and 131B may be selectively disposed on the same first substrate 110 with the active devices T and the pixel electrodes 120 of the pixel structures SPX, so as to form a color filter on array (COA) structure. However, the invention is not limited thereto, and in other embodiments, the plurality of

color resistors

131R, 131G, 131B may be selectively disposed on the second substrate 210. For example, in the present embodiment, the

color resistors

131R, 131G, and 131B of the display panel 10 may include a red color resistor, a green color resistor, and a blue color resistor, but the invention is not limited thereto.

In addition, in the embodiment, the pixel array substrate 1 may further optionally include a protection layer 140 disposed on the plurality of color resists 131R, 131G, and 131B. For example, in the present embodiment, the material of the protection layer 140 may be an organic material, an inorganic material (e.g., silicon oxide, silicon nitride, silicon oxynitride, or a stacked layer of at least two of the above materials), or a combination thereof.

The display panel 10 further includes a first sealant 6 disposed between the first base 110 of the pixel array substrate 1 and the second base 210 of the opposite substrate 2 and on the peripheral region 110b of the first base 110. The area of the first substrate 110 surrounded by the first encapsulant 6 is the active region 110 a. The area of the first substrate 110 occupied by the first encapsulant 6 and located at the periphery of the first encapsulant 6 is the peripheral area 110 b.

It is noted that the display panel 10 further includes at least one

filter pattern

132R, 132B, the peripheral region 110B of the first substrate 110 has a protrusion 110B-1 beyond the second substrate 210, and the at least one

filter pattern

132R, 132B is disposed between the protrusion 110B-1 of the first substrate 110 and the second substrate 210.

In the present embodiment, the sidewall 214 of the second substrate 210 overlaps the at least one

filter pattern

132R, 132B. That is, the vertical projection of the sidewall 214 of the second base 210 on the first substrate 110 overlaps with the vertical projection of the at least one

filter pattern

132R, 132B on the first substrate 110.

In the embodiment, the at least one

filter pattern

132R, 132B and the plurality of pixel structures SPX may be selectively disposed on the same first substrate 110, but the invention is not limited thereto.

Furthermore, in the present embodiment, the at least one

filter pattern

132R, 132B in the peripheral region 110B may be selectively formed together with the at least one

color resistor

131R, 131B in the active region 110a, and the material of the at least one

filter pattern

132R, 132B may be the same as the material of the at least one

color resistor

131R, 131B.

For example, in the present embodiment, the at least one

filter pattern

132R, 132B may include a plurality of

stacked filter patterns

132R, 132B, wherein colors of the plurality of

filter patterns

132R, 132B are different from each other; the filter pattern 132R and the color resistor 131R in the active region 110a can be formed in the same process, and the filter pattern 132R and the color resistor 131R in the active region 110a have the same material and color; the filter pattern 132B in the peripheral region 110B and the color resistor 131B in the active region 110a can be formed in the same process, and the filter pattern 132B and the color resistor 131B in the active region 110a have the same material and color.

In the present embodiment, the color of the filter pattern 132R and the color of the filter pattern 132B are, for example, red and blue. However, the present invention is not limited thereto, and in other embodiments, the colors of the

filter patterns

132R and 132B may be other color combinations. For example, in one embodiment, the color of the

filter patterns

132R and 132B may be red and green; in another embodiment, the color of the

filter patterns

132R and 132B may be green and blue.

In addition, in the present embodiment, the number of the at least one

filter pattern

132R and 132B disposed in the peripheral region 110B is not limited to two as shown in fig. 1. In an embodiment, the number of the at least one

filter pattern

132R and 132B disposed in the peripheral region 110B may also be one, three or more than three. For example, in another embodiment not shown, the at least one filter pattern disposed in the peripheral region 110B may include a filter pattern 132R, a filter pattern 132B and another filter pattern (not shown) stacked together, and the filter pattern 132R, the filter pattern 132B and the another filter pattern may be formed with the color resistor 131R, the color resistor 131G and the color resistor 131B in the active region 110a, respectively; the color of the

stacked filter patterns

132R, 132B and the other filter pattern may be red, green and blue.

The display panel 10 further includes a light blocking pattern layer 220. In the embodiment, the light-shielding pattern layer 220 may be selectively disposed on the second substrate 210 and between the second substrate 210 and the display medium 3. The light-shielding pattern layer 220 has a plurality of openings 222, the plurality of openings 222 are respectively overlapped with the plurality of pixel electrodes 120 of the plurality of pixel structures SPX, and the light-shielding pattern layer 220 is a so-called Black Matrix (BM).

In the present embodiment, the light-shielding pattern layer 220 has a sidewall 224 located above the peripheral region 110B of the first substrate 110, and the at least one

filter pattern

132R, 132B overlaps the sidewall 224 of the light-shielding pattern layer 220 located above the peripheral region 110B. That is, the vertical projection of the outline of the light-shielding pattern layer 220 defined by the sidewall 224 on the first substrate 110 overlaps the vertical projection of the at least one

filter pattern

132R, 132B on the first substrate 110.

The display panel 10 further includes a second sealant 7. The second encapsulant 7 is disposed on the sidewall 114 of the first substrate 110 and the sidewall 214 of the second substrate 210 to block light beams emitted from the backlight module (not shown) from leaking out of the peripheral region 110 b.

In the present embodiment, the second encapsulant 7 is further disposed on at least one sidewall 132Rs, 132Bs of the at least one

filter pattern

132R, 132B, the sidewall 144 of the passivation layer 140, and the sidewall 224 of the light shielding pattern layer 220.

In the present embodiment, the filter pattern 132R, the filter pattern 132B and a portion of the passivation layer 140 are sequentially stacked on the protrusion 110B-1 of the first substrate 110; the filter patterns 132R, the filter patterns 132B, and a portion of the passivation layer 140 disposed on the stacked structure of the

filter patterns

132R and 132B may form a dam structure B; the dam structure B can prevent the second encapsulant 7 from excessively penetrating into the gap g between the pixel array substrate 1 and the opposite substrate 2.

In the embodiment, the second substrate 210 is located between the polarizer 5 and the at least one

filter pattern

132R, 132B, and a portion of the second encapsulant 7 is disposed between the polarizer 5 and the at least one

filter pattern

132R, 132B. Furthermore, in the present embodiment, the polarizer 5 has a protrusion 5-1 beyond the second substrate 210, the protrusion 5-1 of the polarizer 5, the sidewall 214 of the second substrate 210, the sidewall 224 of the light-shielding pattern layer 220 and the retaining wall structure B define a space G, and a portion of the second encapsulant 7 fills the space G.

It should be noted that at least one of the

filter patterns

132R and 132B disposed between the protrusion 110B-1 of the first substrate 110 and the second substrate 210 can block a light beam emitted from a backlight module (not shown) disposed below the display panel 10, so as to prevent the light beam from leaking from the top of the protrusion 110B-1 of the first substrate 110 and/or the interface between the second substrate 210 and the second sealant 7. Therefore, the side spot light leakage phenomenon of the display panel 10 can be improved.

Claims

1. A display panel, comprising:

a first substrate having an active region and a peripheral region outside the active region;

a plurality of pixel structures disposed on the active region of the first substrate;

a second substrate disposed opposite to the first substrate;

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

a first sealant disposed between the first substrate and the second substrate and on the peripheral region of the first substrate;

at least one light filtering pattern, wherein the peripheral area of the first substrate is provided with a protruding part which exceeds the second substrate, and the at least one light filtering pattern is arranged between the protruding part of the first substrate and the second substrate; and

and a second sealant disposed on a sidewall of the first substrate and a sidewall of the second substrate.

2. The display panel of claim 1, wherein the second encapsulant is further disposed on at least one sidewall of the at least one filter pattern.

3. The display panel of claim 1, wherein the sidewall of the second substrate overlaps the at least one filter pattern.

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

and a light-shielding pattern layer disposed on the second substrate and between the second substrate and the display medium, wherein the at least one light-filtering pattern is overlapped with a sidewall of the light-shielding pattern layer above the peripheral region.

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

a polarizer disposed on the second substrate, wherein the second substrate is disposed between the polarizer and the at least one light filtering pattern, and a portion of the second sealant is disposed between the polarizer and the at least one light filtering pattern.

6. The display panel of claim 1, wherein the at least one filter pattern and the pixel structures are disposed on the same first substrate.

7. The display panel of claim 1, wherein each of the pixel structures includes an active device and a pixel electrode electrically connected to the active device, and the display panel further comprises:

and a plurality of color resistors respectively overlapped with the plurality of pixel electrodes of the pixel structures, wherein the material of the at least one filtering pattern is the same as that of the at least one color resistor.

8. The display panel of claim 1, wherein the at least one filter pattern comprises a plurality of filter patterns stacked one on another, and the filter patterns are different from one another in color.

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

a protective layer, wherein the filter patterns, the protective layer and a portion of the second encapsulant are sequentially stacked on the protrusion of the first substrate.