CN110187572B

CN110187572B - Display device

Info

Publication number: CN110187572B
Application number: CN201910560634.5A
Authority: CN
Inventors: 张吉和
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2018-12-19
Filing date: 2019-06-26
Publication date: 2022-02-11
Anticipated expiration: 2039-06-26
Also published as: CN110187572A; TWI688888B; TW202024871A

Abstract

The invention discloses a display device, which comprises a first substrate, at least one active element arranged on the first substrate, a dielectric layer arranged on the at least one active element, at least one pixel electrode electrically connected with the at least one active element, a second substrate arranged opposite to the first substrate, a first spacer arranged on the second substrate and a display medium. The dielectric layer has a first protrusion and a body portion outside the first protrusion. At least one pixel electrode is disposed on the main body portion of the dielectric layer. The vertical projection of the first protrusion of the dielectric layer on the first substrate is located within the vertical projection of the first spacer on the first substrate.

Description

Display device

Technical Field

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

Background

With the development of technology, display devices are widely applied to various electronic products, such as: smart phones, smart watches, tablet computers, and the like. Most electronic products have a touch function based on the consideration of convenient operation. In the process of touching the electronic product, an external force is applied to the display device. Therefore, the display device needs to have good pressure resistance.

Generally, a display device includes a pixel array substrate, an opposite substrate opposite to the pixel array substrate, and a display medium disposed between the pixel array substrate and the opposite substrate. The opposite substrate is provided with a support to maintain a gap between the pixel array substrate and the opposite substrate. However, in the pressure resistance test, an external force is applied to the display device, which causes the counter substrate to move relative to the pixel array substrate. When the opposite substrate moves relative to the pixel array substrate, the spacers of the opposite substrate may damage the alignment film on the pixel array substrate, resulting in a problem of broken bright spots (glaxy mura).

Disclosure of Invention

The invention provides a display device with good performance.

The display device of an embodiment of the invention includes a first substrate, at least one active device, a dielectric layer, at least one pixel electrode, a second substrate, a first spacer and a display medium. The at least one active element is arranged on the first substrate and is provided with a first convex part and a main body part outside the first convex part. The top surface of the first convex part has a first distance with the first base, the top surface of the main body part has a second distance with the first base, and the first distance is larger than the second distance. The at least one pixel electrode is electrically connected with the at least one active device and is arranged on the main body part of the dielectric layer. The second substrate is arranged opposite to the first substrate. The first spacer is disposed on the second substrate. The vertical projection of the first protrusion of the dielectric layer on the first substrate is located within the vertical projection of the first spacer on the first substrate. The display medium is arranged between the first substrate and the second substrate.

The display device of an embodiment of the invention includes a first substrate, a plurality of active devices, a dielectric layer, a plurality of pixel electrodes, a second substrate, a first spacer and a display medium. The plurality of active elements are arranged on the first substrate. The dielectric layer is disposed on the first substrate and has a first protrusion, a main body and a plurality of contact windows. The top surface of the first convex part has a first distance with the first base, the top surface of the main body part has a second distance with the first base, and the first distance is larger than the second distance. The pixel electrodes are disposed on the main body portion of the dielectric layer and electrically connected to the active devices through the contact windows. The second substrate is arranged opposite to the first substrate. The first spacer is disposed on the second substrate. The display medium is arranged between the first substrate and the second substrate. The first protrusion of the dielectric layer includes a main sub-portion and at least one extending sub-portion. The vertical projection of the main sub-portion on the first substrate is overlapped with the vertical projection of the first spacer on the first substrate, the vertical projection of the main sub-portion on the first substrate is provided with a notch, and at least one part of the vertical projection of one of the contact windows on the first substrate is positioned in the notch. At least one extending sub-portion extends outwardly from the main sub-portion. The vertical projection of the at least one extending sub-portion on the first substrate extends beyond the vertical projection of the first spacer on the first substrate.

In an embodiment of the invention, the display device further includes at least one common electrode, an insulating layer, and a first touch signal line. At least one common electrode is disposed on the dielectric layer. The insulating layer is arranged between the at least one common electrode and the at least one pixel electrode. The first touch signal line is electrically connected with at least one common electrode. The first touch signal line is provided with a first auxiliary part which completely covers the first convex part of the dielectric layer.

In an embodiment of the invention, a vertical projection of the first auxiliary portion of the first touch signal line on the first substrate is located within a vertical projection of the first spacer on the first substrate, and a portion of an edge of the vertical projection of the first auxiliary portion on the first substrate is substantially parallel to a portion of an edge of the vertical projection of the first spacer on the first substrate.

In an embodiment of the invention, the display device further includes a second spacer and a second touch signal line. The second spacer is disposed on the second substrate and spaced apart from the first spacer. The second touch signal line is disposed on the first substrate and electrically connected to the at least one common electrode. The second touch signal line is provided with a second auxiliary part. The vertical projection of the second auxiliary part on the first substrate is positioned within the vertical projection of the second spacer on the first substrate, and a part of the edge of the vertical projection of the second auxiliary part on the first substrate is substantially parallel to a part of the edge of the vertical projection of the second spacer on the first substrate.

In an embodiment of the invention, the dielectric layer further has a first protrusion and a second protrusion outside the main body, and the second auxiliary portion completely covers the second protrusion of the dielectric layer.

In an embodiment of the invention, the dielectric layer further has a first protrusion and a second protrusion outside the main body, a third distance is provided between a top surface of the second protrusion and the first substrate, and the third distance is greater than the second distance and smaller than the first distance. The display device further comprises a second spacer disposed on the second substrate. The vertical projection of the second protrusion of the dielectric layer on the first substrate overlaps the vertical projection of the second spacer on the first substrate, and the height of the first spacer is substantially equal to the height of the second spacer.

In an embodiment of the invention, a vertical projection of the second protrusion on the first substrate is located within a vertical projection of the second spacer on the first substrate.

In an embodiment of the invention, a distance L is formed between the edge of the vertical projection of the first protrusion on the first substrate and the edge of the vertical projection of the first spacer on the first substrate, and L is greater than or equal to 1 μm.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

Fig. 1 is a schematic top view of a display device 10 according to a first embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of a display device 10 according to a first embodiment of the invention.

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

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

Fig. 5 is a schematic top view of a display device 10B according to a third embodiment of the invention.

Fig. 6 is a schematic cross-sectional view of a display device 10B according to a third embodiment of the invention.

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

Fig. 8 is a schematic cross-sectional view of a display device 10C according to a fourth embodiment of the invention.

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

Fig. 10 is a schematic cross-sectional view of a display device 10D according to a fifth embodiment of the invention.

Fig. 11 is a schematic top view of a display device 10E according to a sixth embodiment of the invention.

Fig. 12 is a schematic cross-sectional view of a display device 10E according to a sixth embodiment of the invention.

Wherein the reference numerals

10. 10A to 10E: display device

100: pixel array substrate

110: a first substrate

120. 130, 160: insulating layer

140: dielectric layer

140 a: contact window

142: first convex part

142-1, 144-1: main subsection

142-2, 144-2: extension sub-part

142a, 144a, 146a, 252 a: the top surface

142 c: gap

144: second convex part

146: main body part

150: pixel electrode

152: main part

154: extension part

172: first touch signal line

172 a: first auxiliary part

172b, 174b, 252b, 254 b: edge of a container

174: second touch signal line

174 a: second auxiliary part

182. 184: common electrode

200: opposite substrate

210: second substrate

220: light shielding layer

230: color filter layer

240: protective layer

252: first spacer

254: second spacer

300: display medium

A-A': cutting line

DL: data line

D: source electrode

D1, D2, D3, L: distance between two adjacent plates

G: gate electrode

H1, H2, H2': height

K. k: film thickness

PI1, PI 2: alignment film

SL: scanning line

And SE: semiconductor layer

S: source electrode

T: active component

Detailed Description

In the drawings, the thickness of layers, films, panels, regions, etc. have been exaggerated for clarity. Throughout the specification, the same reference numerals denote the same or similar elements. 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, an "electrical connection" or "coupling" may be the presence of other elements between the two elements.

As used herein, "about," "approximately," or "substantially" includes the average of the stated value and a specified value within an acceptable range of deviation of the stated value, as determined by one of ordinary skill in the art, given the particular number of measurements discussed and the errors associated with the measurements (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated values, or within ± 30%, ± 20%, ± 10%, ± 5%. Further, as used herein, "about", "approximately" or "substantially" may be selected based on optical properties, etching properties or other properties to select a more acceptable range of deviation or standard deviation, and not to apply one standard deviation to all properties.

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.

Exemplary embodiments are described herein with reference to cross-sectional views that are schematic illustrations of idealized embodiments. Thus, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region shown or described as flat may generally have rough and/or nonlinear features. Further, the acute angles shown may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

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.

Fig. 1 is a schematic top view of a display device 10 according to a first embodiment of the invention. Fig. 2 is a schematic cross-sectional view of a display device 10 according to a first embodiment of the invention. Fig. 2 corresponds to the section line a-a' of fig. 1. Fig. 1 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer (overcoat layer)240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 2.

Referring to fig. 1 and 2, the display device 10 includes a pixel array substrate 100, an opposite substrate 200 and a display medium 300. The opposite substrate 200 is disposed opposite to the pixel array substrate 100. The display medium 300 is disposed between the pixel array substrate 100 and the opposite substrate 200. For example, in the embodiment, the display medium 300 may be a liquid crystal, but the invention is not limited thereto.

The pixel array substrate 100 includes a first substrate 110. The first substrate 110 is mainly used for carrying components of the pixel array substrate 100. For example, in the present embodiment, the material of the first substrate 110 can be glass, quartz, organic polymer, or an opaque/reflective material (e.g., wafer, ceramic, or other suitable materials), or other suitable materials.

The pixel array substrate 100 includes a plurality of active devices T disposed on a first substrate 110. The active device T is electrically connected to the scan line SL and the data line DL. The active device T includes a thin film transistor having a gate G, a semiconductor layer SE, and a source S and a drain D electrically connected to two different regions of the semiconductor layer SE, respectively. An insulating layer 120 is disposed between the gate electrode G and the semiconductor layer SE. The scan line SL is electrically connected to the gate G of the thin film transistor. For example, in the present embodiment, the gate electrode G may be a conductive pattern extending from the scan line SL, but the invention is not limited thereto. The data line DL is electrically connected to the source S of the TFT T. For example, in the present embodiment, the source S may be a portion of the data line DL overlapping the semiconductor layer SE, but the invention is not limited thereto.

In the present embodiment, the gate electrode G may be located below the semiconductor layer SE, and the active device T may include a bottom gate thin film transistor. However, the invention is not limited thereto, and according to other embodiments, the active device T may also include a top gate type (top gate), a three-dimensional type thin film transistor, or other suitable type of thin film transistor. In the present embodiment, the material of the semiconductor layer SE may be Amorphous Silicon, that is, the active device T may be an Amorphous Silicon thin film transistor (a-Si TFT). However, the present invention is not limited thereto. In other embodiments, the material of the semiconductor layer SE may include microcrystalline silicon, nanocrystalline silicon, polycrystalline silicon, monocrystalline silicon, an organic semiconductor material, an oxide semiconductor material, carbon nanotubes/rods, perovskite, or other suitable materials. In addition, in the present embodiment, the gate electrode G and the scan line SL may belong to the same first conductive layer, and the data line DL, the source electrode S and the drain electrode D may belong to the same second conductive layer. However, the invention is not limited thereto, and in other embodiments, the film layers of the gate electrode G, the scan line SL, the data line DL, the source electrode S and the drain electrode D may also be varied according to actual requirements.

In the present embodiment, the pixel array substrate 100 may optionally include an insulating layer 130 (shown in fig. 2) disposed on the active device T.

The pixel array substrate 100 includes a dielectric layer 140 disposed on the active device T. For example, in the embodiment, the dielectric layer 140 may be selectively on the insulating layer 130, but the invention is not limited thereto.

In the present embodiment, the dielectric layer 140 has a first protrusion 142 and a body portion 146 outside the first protrusion 142. The top surface 142a of the first protrusion 142 has a first distance D1 from the first base 110, the top surface 146a of the main body portion 146 has a second distance D2 from the first base 110, and the first distance D1 is greater than the second distance D2. That is, the first protrusion 142 protrudes with respect to the body portion 146. In the embodiment, the first protrusion 142 may be selectively disposed on one active device T to optimize the aperture ratio of the pixel array substrate 100, but the invention is not limited thereto. For example, in the present embodiment, the material of the dielectric layer 140 may be a photoresist, but the invention is not limited thereto.

The pixel array substrate 100 includes a plurality of pixel electrodes 150 electrically connected to the plurality of active devices T and disposed on the main body portion 146 of the dielectric layer 140. For example, in the present embodiment, the pixel electrode 150 includes a main portion 152 and an extension portion 154, and the main portion 152 of the pixel electrode 150 overlaps with a plurality of slits (not shown) of the

common electrodes

182 and 184. The main portion 152 (shown in fig. 1) of the pixel electrode 150 is disposed on the main portion 146 of the dielectric layer 140, and the extension portion 154 of the pixel electrode 150 extends from the main portion 152 to the contact window 140a of the dielectric layer 140 to electrically connect with the drain D of the tft, it should be noted that neither the main portion 152 nor the extension portion 154 of the pixel electrode 150 is higher than the top surface 142a of the dielectric layer. In the present embodiment, a vertical projection of the first protrusion 142 of the dielectric layer 140 on the first substrate 110 may have a notch 142c (shown in fig. 1), and at least a portion of the vertical projection of the contact window 140a on the first substrate 110 is located in the notch 142 c.

The pixel array substrate 100 includes an insulating layer 160 disposed between the

common electrodes

182 and 184 and the pixel electrode 150.

In the present embodiment, the pixel array substrate 100 may further include a first touch signal line 172 and a second touch signal line 174 disposed on the first substrate 110 and electrically connected to at least one of the

common electrodes

182 and 184. For example, in the present embodiment, the first touch signal line 172 and the second touch signal line 174 may be disposed on the insulating layer 160, but the invention is not limited thereto. The first and second

touch signal lines

172 and 174 include first and second

auxiliary portions

172a and 174a, respectively. In the present embodiment, the first auxiliary portion 172a and the second auxiliary portion 174a may be selectively disposed on the two active devices T, respectively. It is noted that, in the embodiment, the first auxiliary portion 172a completely covers the first protrusion 142 of the dielectric layer 140, such that the height difference between the first protrusion and the opening area is D1-D2+ K, the height difference between the second auxiliary portion 174a and the opening area is K, and the projections of the main portion 152 and the extension portion 154 of the pixel electrode 150 do not overlap the first auxiliary portion 172a and the second auxiliary portion 174 a. The film thickness K of the first auxiliary portion 172a and the film thickness K of the second auxiliary portion 174a are both thick. For example, the film thickness K of the present embodiment may be larger than 0.3 μm, but the invention is not limited thereto.

The pixel array substrate 100 includes at least one

common electrode

182, 184 disposed on the dielectric layer 140. For example, in the present embodiment, the insulating layer 160 can be disposed on the pixel electrode 150, and the at least one

common electrode

182, 184 can be disposed on the insulating layer 160. That is, in the present embodiment, at least one of the

common electrodes

182 and 184 can be disposed above the pixel electrode 150. However, the invention is not limited thereto, and according to other embodiments, the pixel electrode 150 may be disposed above at least one of the

common electrodes

182 and 184. In the present embodiment, the at least one

common electrode

182, 184 may include a first common electrode 182 and a second common electrode 184 electrically connected to the first touch signal line 172 and the second touch signal line 174. In the touch time period, the

common electrodes

182 and 184 are used as touch sensing pads. In the display period, the voltage difference between the

common electrodes

182 and 184 and the pixel electrode 150 is used to drive the display medium 300. In the present embodiment, the first common electrode 182 and the second common electrode 184 can be connected to belong to the same touch sensing pad. However, the invention is not limited thereto, and according to other embodiments, the first common electrode 182 and the second common electrode 184 may be separated and belong to different touch sensing pads.

In the embodiment, the pixel array substrate 100 includes an alignment film PI1, for example, disposed on at least one of the

common electrodes

182 and 184.

The opposite substrate 200 includes a second base 210. The second base 210 is mainly used for carrying components of the opposite substrate 200. For example, in the present embodiment, the material of the second substrate 210 may be glass, quartz, organic polymer, or other suitable materials.

In the present embodiment, the opposite substrate 200 may include a first spacer 252 and a second spacer 254 spaced apart from the first spacer 252, and disposed on the second substrate 210. The vertical projection of the first spacer 252 on the first substrate 110 overlaps with the vertical projection of the first protrusion 142 on the first substrate 110. Under the condition that the display device 10 is not subjected to an external force, the first spacer 252 abuts against the first protrusion 142, and a gap (D1-D2+ H1-H2) is formed between the second spacer 254 and the pixel array substrate 100, so that the yield interval of the liquid crystal dropping process can be increased. That is, the first spacers 252 may be considered as primary spacers, and the second spacers 254 may be considered as secondary spacers. In the embodiment, the height H1 of the first spacer 252 may be greater than the height H2 of the second spacer 254, but the invention is not limited thereto. In other embodiments, the height H1 of the first spacer 252 may be equal to the height H2 of the second spacer 254, and when the display device 10 is not subjected to an external force, the first spacer 252 abuts against the first protrusion 142, and the gap between the second spacer 254 and the pixel array substrate 100 is D1-D2.

In the embodiment, the vertical projection of the first auxiliary portion 172a of the first touch signal line 172 on the first substrate 110 is located within the vertical projection of the first spacer 252 on the first substrate 110, and a portion of a vertically projected edge 172b (shown in fig. 1) of the first auxiliary portion 172a on the first substrate 110 is substantially parallel to a portion of a vertically projected edge 252b (shown in fig. 1) of the first spacer 252 on the first substrate 110, however, the invention is not limited thereto, the vertical projection of the first auxiliary portion 172a of the first touch signal line 172 on the first substrate 110 and the vertical projection of the first spacer 252 on the first substrate 110 may be, for example, an ellipse, a circle, a polygon or other suitable shapes, which may be similar or different, and it is only required that the vertical projection of the first auxiliary portion 172a of the first touch signal line 172 on the first substrate 110 is located within the vertical projection of the first spacer 252 on the first substrate 110. The vertical projection of the second auxiliary portion 174a of the second touch signal line 174 on the first substrate 110 is located within the vertical projection of the second spacer 254 on the first substrate 110, and a portion of a vertically projected edge 174b (labeled in fig. 1) of the second auxiliary portion 174a on the first substrate 110 is substantially parallel to a portion of a vertically projected edge 254b (labeled in fig. 1) of the second spacer 254 on the first substrate 110, but the invention is not limited thereto, and the vertical projection of the second auxiliary portion 174a of the second touch signal line 174 on the first substrate 110 and the vertical projection of the second spacer 254 on the first substrate 110 may be, for example, an ellipse, a circle, a polygon, or other suitable shapes, and the shapes of the two may be similar or different.

In addition, in the embodiment, the opposite substrate 200 may further include a light-shielding layer 220, a color filter layer 230, a protection layer (over-coat layer)240 and an alignment layer PI2 sequentially stacked on the second substrate 210, and the first spacer 252 and the second spacer 254 may be disposed on the protection layer 240, but the invention is not limited thereto.

It is noted that the first spacers 252 are disposed on the first protrusions 142 corresponding to the dielectric layer 140, and the main portions 152 and the extension portions 154 of the pixel electrodes 150 are disposed below the top surface 142a of the dielectric layer 140. That is, the top surface 252a of the first spacer 252 is higher than the main portion 152 and the extension portion 154 of the pixel electrode 150. Therefore, the first spacers 252 are not likely to damage the main portion 152 of the pixel electrode 150 and the alignment film PI1 on the upper and the edge of the extension portion 154 due to the horizontal offset between the opposite substrate 200 and the pixel array substrate 100.

In the present embodiment, a vertical projection of the first protrusion 142 of the dielectric layer 140 on the first substrate 110 is located within a vertical projection of the first spacer 252 on the first substrate 110. That is, the top surface 252a of the first spacer 252 is larger than the top surface 142a of the first protrusion 142 of the dielectric layer 140. For example, in the embodiment, a distance L is formed between the edge of the vertical projection of the first protrusion 142 on the first substrate 110 and the edge of the vertical projection of the first spacer 252 on the first substrate 110, and L is greater than or equal to 1 μm. Preferably, L.gtoreq.3 μm, but the present invention is not limited thereto. As such, even if the opposite substrate 200 and the pixel array substrate 100 vibrate or press in the vertical direction, the edge 252b of the first spacer 252 projected vertically on the first substrate 110 can still be located outside the first protrusion 142 of the dielectric layer 140. Under the condition that the top surface 252a of the first spacer 252 abuts against the first protrusion 142 of the dielectric layer 140, even though the counter substrate 200 and the pixel array substrate 100 continuously vibrate or press in the vertical direction, the edge 252b of the first spacer 252, which is vertically projected on the first substrate 110, is located outside the top surface 142 of the first protrusion 142, and thus the alignment film PI1 on the top surface 142a of the first protrusion 142 of the dielectric layer 140 is not easily damaged by the vibration or the press in the vertical direction. Thereby, the problem of the broken bright spots (galaxy mura) can be remarkably improved.

Fig. 3 is a schematic top view of a display device 10A according to a second embodiment of the invention. Fig. 4 is a schematic cross-sectional view of a display device 10A according to a second embodiment of the invention. Fig. 4 corresponds to the section line a-a' of fig. 3. Fig. 3 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer 240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 4.

The display device 10A of fig. 3 and 4 is similar to the display device 10 of fig. 1 and 2, with the differences described below. Referring to fig. 3 and 4, the display device 10A may not include the first touch signal line 172 and the second touch signal line 174. The dielectric layer 140 of the display device 10A further has a first protrusion 142 and a second protrusion 144 outside the main body portion 146, and a top surface 144a of the second protrusion 144 has a third distance D3 from the first substrate 110. In the embodiment, the third distance D3 is greater than the second distance D2, and the first distance D1 and the third distance D3 may be equal, but the invention is not limited thereto. The vertical projection of the second protrusion 144 of the dielectric layer 140 on the first substrate 110 overlaps the vertical projection of the second spacer 254 on the first substrate 110, but the invention is not limited thereto. In other embodiments, the vertical projection of the second spacer 254 on the first substrate 110 can be selectively located inside or outside the vertical projection of the second protrusion 144 on the first substrate 110 according to the size of the opening region.

Fig. 5 is a schematic top view of a display device 10B according to a third embodiment of the invention. Fig. 6 is a schematic cross-sectional view of a display device 10B according to a third embodiment of the invention. Fig. 6 corresponds to section line a-a' of fig. 5. Fig. 5 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer 240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 6.

The display device 10B of fig. 5 and 6 is similar to the display device 10A of fig. 3 and 4, with the differences described below. Referring to fig. 5 and 6, the dielectric layer 140 of the display device 10B also has a second protrusion 144, and a top surface 144a of the second protrusion 144 has a third distance D3 from the first substrate 110. Unlike the display device 10A, in the embodiment, the third distance D3 is greater than the second distance D2 and less than the first distance D1, and the height H1 of the first spacer 252 and the height H2' of the second spacer 254 are substantially equal, at this time, under the condition that the display device 10 is not subjected to an external force, the first spacer 252 abuts against the first protrusion 142, and a gap (D1-D3) is formed between the second spacer 254 and the pixel array substrate 100, which can be used to increase the yield interval of the liquid crystal dropping process.

In addition, in the embodiment, the vertical projection of the second protrusion 144 on the first substrate 110 may be located within the vertical projection of the second spacer 254 on the first substrate 110.

Fig. 7 is a schematic top view of a display device 10C according to a fourth embodiment of the invention. Fig. 8 is a schematic cross-sectional view of a display device 10C according to a fourth embodiment of the invention. Fig. 8 corresponds to section line a-a' of fig. 7. Fig. 7 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer 240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 8.

The display device 10C of fig. 7 and 8 is similar to the display device 10 of fig. 1 and 2, with the differences described below. Referring to fig. 7 and 8, the dielectric layer 140 of the display device 10C further has a first protrusion 142 and a second protrusion 144 outside the main body portion 146, and a top surface 144a of the second protrusion 144 has a third distance D3 from the first substrate 110. In the present embodiment, the third distance D3 is greater than the second distance D2, and the first distance D1 is equal to the third distance D3. In the present embodiment, the second auxiliary portion 174a completely covers the second protrusion 144 of the dielectric layer 140. In addition, the film thickness k of the first auxiliary portion 172a and the second auxiliary portion 174a in FIG. 8 can be designed to be between 0.05 μm and 0.5 μm according to the resistance value, but not limited thereto.

Fig. 9 is a schematic top view of a display device 10D according to a fifth embodiment of the invention. Fig. 10 is a schematic cross-sectional view of a display device 10D according to a fifth embodiment of the invention. Fig. 10 corresponds to section line a-a' of fig. 9. Fig. 9 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer 240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 10.

The display device 10D of fig. 9 and 10 is similar to the display device 10C of fig. 7 and 8, with the difference that: the display device 10D may not include the first touch signal line 172 and the second touch signal line 174 of the display device 10C.

Fig. 11 is a schematic top view of a display device 10E according to a sixth embodiment of the invention. Fig. 12 is a schematic cross-sectional view of a display device 10E according to a sixth embodiment of the invention. FIG. 12 corresponds to section line A-A' of FIG. 11. Fig. 11 omits the first substrate 110, the insulating layer 120, the insulating layer 130, the insulating layer 160, the alignment film PI1, the display medium 300, the alignment film PI2, the protective layer 240, the color filter layer 230, the light-shielding layer 220, and the second substrate 210 of fig. 12. The display device 10E of fig. 11 and 12 is similar to the display device 10D of fig. 9 and 10, and the differences therebetween are as follows.

Referring to fig. 11 and 12, the first protrusion 142 of the dielectric layer 140 includes a main sub-portion 142-1 and an extending sub-portion 142-2. The vertical projection of the main sub-portion 142-1 of the first protrusion 142 on the first substrate 110 overlaps with the vertical projection of the first spacer 252 on the first substrate 110, the vertical projection of the main sub-portion 142-1 of the first protrusion 142 on the first substrate 110 has a notch 142c, and at least a portion of the vertical projection of the contact window 140a on the first substrate 110 is located in the notch 142 c. The extension sub-portion 142-2 of the first protrusion 142 extends outward from the main sub-portion 142-1 of the first protrusion 142. The vertical projection of the extension sub-portion 142-2 of the first protrusion 142 on the first substrate 110 extends beyond the vertical projection of the first spacer 252 on the first substrate 110. At least a portion of the vertical projection of the extension sub-portion 142-2 of the first protrusion 142 on the first substrate 110 is located between the vertical projections of the pixel electrodes 150 on the first substrate 110.

Similarly, the second protrusion 144 of the dielectric layer 140 includes a main sub-portion 144-1 and an extension sub-portion 144-2. A vertical projection of the main sub-portion 144-1 of the second protrusion 144 on the first substrate 110 overlaps a vertical projection of the first spacer 252 on the first substrate 110. The extending sub-portion 144-2 of the second protrusion 144 extends outwardly from the main sub-portion 144-1 of the second protrusion 144. The vertical projection of the extension sub-portion 144-2 of the second protrusion 144 on the first substrate 110 extends beyond the vertical projection of the second spacer 254 on the first substrate 110. At least a portion of the vertical projection of the extended sub-portion 144-2 of the second protrusion 144 on the first substrate 110 is located between the vertical projections of the pixel electrodes 150 on the first substrate 110.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein 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 device, comprising:

a first substrate;

at least one active element disposed on the first substrate;

a dielectric layer disposed on the at least one active device and having a first protrusion and a main body portion outside the first protrusion, wherein a top surface of the first protrusion has a first distance from the first substrate, a top surface of the main body portion has a second distance from the first substrate, and the first distance is greater than the second distance;

at least one pixel electrode electrically connected to the at least one active device and disposed on the main body portion of the dielectric layer;

a second substrate disposed opposite to the first substrate;

a first spacer disposed on the second substrate, wherein a vertical projection of the first protrusion of the dielectric layer on the first substrate is within a vertical projection of the first spacer on the first substrate; and

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

the edge of the vertical projection of the first protrusion on the first substrate is separated from the edge of the vertical projection of the first spacer on the first substrate by a distance L, wherein L is greater than or equal to 1 μm.

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

at least one common electrode disposed on the dielectric layer;

an insulating layer disposed between the at least one common electrode and the at least one pixel electrode; and

a first touch signal line electrically connected to the at least one common electrode, wherein the first touch signal line has a first auxiliary portion completely covering the first protrusion of the dielectric layer.

3. The display device according to claim 2, wherein a vertical projection of the first auxiliary portion of the first touch signal line on the first substrate is located within a vertical projection of the first spacer on the first substrate, and a portion of an edge of the vertical projection of the first auxiliary portion on the first substrate is substantially parallel to a portion of an edge of the vertical projection of the first spacer on the first substrate.

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

a second spacer disposed on the second substrate and spaced apart from the first spacer; and

a second touch signal line disposed on the first substrate and electrically connected to the at least one common electrode, wherein the second touch signal line has a second auxiliary portion, a vertical projection of the second auxiliary portion on the first substrate is located within a vertical projection of the second spacer on the first substrate, and a portion of an edge of the vertical projection of the second auxiliary portion on the first substrate is substantially parallel to a portion of an edge of the vertical projection of the second spacer on the first substrate.

5. The display device according to claim 4, wherein the dielectric layer further has the first protrusion and a second protrusion outside the main body portion, and the second auxiliary portion completely covers the second protrusion of the dielectric layer.

6. The display device according to claim 1, wherein the dielectric layer further has the first protrusion and a second protrusion outside the main body, a top surface of the second protrusion having a third distance from the first substrate, the third distance being greater than the second distance and less than the first distance, and the display device further comprises:

a second spacer disposed on the second substrate, wherein a vertical projection of the second protrusion of the dielectric layer on the first substrate overlaps a vertical projection of the second spacer on the first substrate, and a height of the first spacer is substantially equal to a height of the second spacer.

7. The display apparatus according to claim 6, wherein the vertical projection of the second protrusion on the first substrate is within the vertical projection of the second spacer on the first substrate.

8. The display apparatus according to claim 1, wherein the distance L between the edge of the perpendicular projection of the first protrusion on the first substrate and the edge of the perpendicular projection of the first spacer on the first substrate is greater than or equal to 3 μm.

9. A display device, comprising:

a first substrate;

a plurality of active elements disposed on the first substrate;

a dielectric layer disposed on the first substrate and having a first protrusion, a main body and a plurality of contact windows, wherein a top surface of the first protrusion has a first distance from the first substrate, a top surface of the main body has a second distance from the first substrate, and the first distance is greater than the second distance;

a plurality of pixel electrodes disposed on the main body portion of the dielectric layer and electrically connected to the active devices through the contact windows;

a second substrate disposed opposite to the first substrate;

a first spacer disposed on the second substrate; and

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

wherein the first protrusion of the dielectric layer comprises:

a main sub-portion, a vertical projection of the main sub-portion on the first substrate overlapping a vertical projection of the first spacer on the first substrate, the vertical projection of the main sub-portion on the first substrate having a notch, at least a portion of a vertical projection of one of the contact windows on the first substrate being located in the notch; and

at least one extending sub-portion extending outward from the main sub-portion, wherein a vertical projection of the at least one extending sub-portion on the first substrate extends beyond a vertical projection of the first spacer on the first substrate.

10. The display device according to claim 9, wherein at least a portion of a vertical projection of the at least one extending sub-portion on the first substrate is located between vertical projections of the pixel electrodes on the first substrate.