TWI703371B - Display panel - Google Patents

Abstract

A display panel includes a first substrate, an active device, a first insulating layer, a pixel electrode, a common electrode, a second insulating layer, a second substrate, a spacer and a display medium. The active device is disposed on the first substrate. The first insulating layer is disposed on the active device. The pixel electrode, the common electrode and the second insulating layer are disposed on the first insulating layer. The second insulating layer is disposed between the pixel electrode and the common electrode. The second insulating layer has a first surface and a side surface. The first surface is connected to the side surface to define a recess of the second insulating layer. The second substrate is disposed opposite the first substrate. The spacer is disposed on the second substrate. A normal projection of the spacer on the first substrate overlaps with a normal projection of the recess of the second insulating layer on the first substrate.

Description

Display panel

The present invention relates to a display panel, and particularly relates to a display panel including spacers.

With the development of display technology, display panels have been widely used in various electronic devices, such as mobile phones, tablet computers, notebook computers, TVs, etc. In order for the electronic device to have a thinner appearance, the thickness of the display panel must also be reduced. Generally speaking, after the active device substrate and the counter substrate are assembled, a thinning process is performed to thin the base of the active device substrate and the counter substrate. However, after the substrate is thinned, the rigidity of the substrate is reduced, and the display panel is easily bent under the influence of gravity, which causes the displacement of the active device substrate and the counter substrate. When the active device substrate is shifted from the counter substrate, the spacers of the counter substrate deviate from the original position and scratch the alignment film on the display area of the active device substrate, resulting in bright spot defects.

The invention provides a display panel with good performance.

The display panel of an embodiment of the present invention includes a first substrate, an active device, a first insulating layer, a pixel electrode, a common electrode, a second insulating layer, a second substrate, a spacer, and a display medium. The active element is arranged on the first substrate. The first insulating layer is disposed on the active element. The pixel electrode, the common electrode and the second insulating layer are arranged on the first insulating layer. The pixel electrode is electrically connected to the active device. The second insulating layer is disposed between the pixel electrode and the common electrode. The second insulating layer has a first surface and a side surface. The first surface and the side surface are connected to define a depression of the second insulating layer. The second substrate is disposed opposite to the first substrate. The spacer is arranged on the second substrate. The vertical projection of the spacer on the first substrate overlaps the vertical projection of the second insulating layer recessed on the first substrate. The display medium is disposed between the first substrate and the second substrate.

The display panel of an embodiment of the present invention includes a first substrate, an active element, a pixel electrode, an insulating layer, a protrusion, a second substrate, a spacer, and a display medium. The active element is arranged on the first substrate. The pixel electrode is arranged on the first substrate and electrically connected to the active device. The insulating layer is disposed on the first substrate. The insulating layer has a first surface and a side surface, and the first surface and the side surface are connected to define a recess of the insulating layer. The protrusions are arranged in the recesses of the insulating layer. The second substrate is disposed opposite to the first substrate. The spacer is arranged on the second substrate, and the spacer and the protrusion abut against each other. The display medium is disposed between the first substrate and the second substrate.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments of the present invention, and examples of the exemplary embodiments are illustrated in the accompanying drawings. Whenever possible, the same component symbols are used in the drawings and descriptions to indicate the same or similar parts.

It should 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 Intermediate 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. As used herein, "connected" can refer to physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may mean that there are other elements between two elements.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the The specific amount of measurement-related error (ie, the limitation of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, the "about", "approximately" or "substantially" used herein can select a more acceptable range of deviation or standard deviation based on optical properties, etching properties, or other properties, instead of using one standard deviation for all properties .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies and the present invention, and will not be interpreted as idealized or excessive The formal meaning, unless explicitly defined as such in this article.

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the invention. 1, the display panel 10 includes an active device substrate 100, an opposite substrate 200 opposite to the active device substrate 100, and a display medium 300 disposed between the active device substrate 100 and the opposite substrate 200. The display medium 300 is disposed between the first base 110 of the active device substrate 100 and the second base 210 of the counter substrate 200. For example, in this embodiment, the display medium 300 is a liquid crystal, but the invention is not limited to this.

The active device substrate 100 includes a first base 110. The first substrate 110 is mainly used to carry the components of the active device substrate 100, and its material can be glass, quartz, organic polymer, or opaque/reflective material (for example: conductive material, wafer, ceramic, or Other applicable materials), or other applicable materials.

The active device substrate 100 includes an active device T, which is disposed on the first substrate 110. The active element T includes a thin film transistor. The thin film transistor has a gate 120, a semiconductor pattern 130, a gate insulating layer GI disposed between the gate 120 and the semiconductor pattern 130, and a source 141 and a drain 142 electrically connected to two different regions of the semiconductor pattern 130, respectively.

In this embodiment, the gate 120 is located under the semiconductor pattern 130, and the thin film transistor may be a bottom gate type transistor. However, the present invention is not limited to this. According to other embodiments, the thin film transistor may also be a top gate type or other appropriate type of transistor.

The active device substrate 100 includes an insulating layer 150 disposed on the active device T. The active device substrate 100 further includes an insulating layer 160 disposed on the insulating layer 150. In this embodiment, the materials of the insulating layers 150 and 160 may be inorganic materials (for example, silicon oxide, silicon nitride, silicon oxynitride, or a stacked layer of at least two of the foregoing materials), organic materials, or a combination of the foregoing.

The active device substrate 100 includes a pixel electrode 190, a common electrode 170, and an insulating layer 180, which are disposed on the insulating layer 160. The insulating layer 180 is disposed between the pixel electrode 190 and the common electrode 170. The pixel electrode 190 is electrically connected to the active device T. In this embodiment, the material of the insulating layer 180 may be an inorganic material (for example, silicon oxide, silicon nitride, silicon oxynitride, or a stacked layer of at least two of the foregoing materials), an organic material, or a combination thereof.

For example, in this embodiment, the common electrode 170 is disposed on the insulating layer 160, the insulating layer 180 is disposed on the common electrode 170, and the pixel electrode 190 is disposed on the insulating layer 180 and has a plurality of slits 192. That is, in this embodiment, the pixel electrode 190 may be disposed above the common electrode 170. However, the present invention is not limited to this. According to other embodiments, the pixel electrode 190 may also be disposed under the common electrode 170.

The opposite substrate 200 includes a second base 210 and a spacer 240. The second substrate 210 is disposed opposite to the first substrate 110. The spacer 240 is disposed on the second substrate 210. In this embodiment, the spacer 240 is, for example, a photo spacer, but the invention is not limited thereto.

In this embodiment, the opposite substrate 200 may optionally include a light shielding pattern 220, which is disposed on the second base 210. The light shielding pattern 220 can shield the spacer 240 and the active device T. In this embodiment, the counter substrate 200 may also optionally include a color filter layer 230, which is disposed on the second base 210 and overlaps the pixel electrode 190. However, the present invention is not limited to this. According to other embodiments, the light shielding pattern 220 and/or the color filter layer 230 may also be selectively disposed on the first substrate 110.

It is worth noting that the insulating layer 180 of the active device substrate 100 has a first surface 182 a and a side surface 182 b; the first surface 182 a and the side surface 182 b are connected to define a recess 182 of the insulating layer 180. The vertical projection of the spacer 240 of the counter substrate 200 on the first base 110 overlaps the vertical projection of the recess 182 of the insulating layer 180 on the first base 110.

Based on the consideration of the aperture ratio, in this embodiment, the recess 182 of the insulating layer 180 can be disposed above the active device T; that is, the vertical projection of the recess 182 of the insulating layer 180 on the first substrate 110 and the active device T The vertical projections on the first substrate 110 can overlap, but the invention is not limited to this.

It is worth mentioning that, in this embodiment, the spacer 240 of the counter substrate 200 can extend into the recess 182 of the insulating layer 180 of the active device substrate 100, and the spacer 240 can abut the first surface 182a of the recess 182 . Thereby, the active device substrate 100 and the counter substrate 200 are not prone to excessive deviation, and the spacer 240 is not prone to deviate from the original position and damage the alignment film (not shown) on the pixel electrode 190. In this way, the bright spot defect described in the prior art can be improved.

Furthermore, in this embodiment, the matching of the spacer 240 and the recess 182 of the insulating layer 180 is used to reduce the probability of the spacer 240 deviating from the original position; instead of using the matching of the spacer 240 and the through hole of the insulating layer 180 The probability of the spacer 240 deviating from the original position is reduced. That is to say, under the premise of effectively reducing the probability of the spacer 240 deviating from the original position, the insulating layer 180 covers the insulating layer 160 that is easy to absorb moisture, so that the display panel 10 is not easily peeled due to the insulating layer 160 swelling after absorbing moisture. )The problem.

It must be noted here that the following embodiments use the element numbers and part of the content of the previous embodiments, wherein the same numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

2 is a schematic cross-sectional view of a display panel according to a second embodiment of the invention. The display panel 10A of FIG. 2 is similar to the display panel 10 of FIG. 1. The difference between the two is that in the embodiment of FIG. 2, a conductive pattern 172 may be provided under the spacer 240.

2, specifically, the conductive pattern 172 is disposed between the insulating layer 180 and the insulating layer 160. The vertical projection of the conductive pattern 172 on the first substrate 110 overlaps the vertical projection of the recess 182 of the insulating layer 180 on the first substrate 110.

In this embodiment, the conductive pattern 172 and the common electrode 170 may be formed on the same first transparent conductive layer, and the conductive pattern 172 may be a part of the common electrode 170, but the invention is not limited to this.

3 is a schematic cross-sectional view of a display panel according to a third embodiment of the invention. The display panel 10B of FIG. 3 is similar to the display panel 10 of FIG. 1, and the differences between the two are as follows.

Please refer to FIG. 3, in this embodiment, the active device substrate 100 further includes a protrusion 194 disposed in the recess 182 of the insulating layer 180. The protrusion 194 has a height H, the recess 182 of the insulating layer 180 has a depth D, and H>D. That is, the apex of the protrusion 194 is higher than the pixel electrode 190 disposed on the insulating layer 180.

。 The spacer 240 of the counter substrate 200 and the protrusion 194 of the active device substrate 100 abut against each other to maintain a cell gap. For example, in this embodiment, the protrusion 194 has a height H, the recess 182 of the insulating layer 180 has a depth D, and the display medium 300 has a thickness G, and

.

In this embodiment, the protrusion 194 may be directly disposed on the first surface 182a of the recess 182 of the insulating layer 180, and the protrusion 194 is in contact with the first surface 182a of the recess 182. In this embodiment, the protrusions 194 and the insulating layer 180 may both include organic materials, and the protrusions 194 can be well attached to the first surface 182a of the insulating layer 180.

It is worth mentioning that by using the spacers 240 of the counter substrate 200 and the protrusions 194 of the active device substrate 100 that are against each other, the active device substrate 100 and the counter substrate 200 are not prone to excessive deviation, and the spacer 240 is not easy to deviate The original position damages the alignment film (not shown) on the pixel electrode 190. In this way, the problem of bright spot defects described in the prior art can be improved.

1.3µm，將具有一定高度H的凸起物194設置於絕緣層180的凹陷182中，能使凸起物194不會過凸起，進而使配向膜（未繪示）能良好地形成在主動元件基板100上。舉例而言，在本實施例中，設置於凹陷182之凸起物194的高度H可大於或等於1.5µm，凸起物194的高度H足夠而不易損壞。 In addition, due to process capability and material characteristics, the protrusion 194 needs to have a certain height H, for example:

1.3μm, the protrusions 194 with a certain height H are arranged in the recesses 182 of the insulating layer 180, so that the protrusions 194 will not be excessively protruding, so that the alignment film (not shown) can be well formed in the active Component substrate 100. For example, in this embodiment, the height H of the protrusion 194 disposed in the recess 182 may be greater than or equal to 1.5 μm, and the height H of the protrusion 194 is sufficient and not easily damaged.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make slight changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

10, 10A, 10B: display panel

100: Active component substrate

110: first substrate

120: gate

130: semiconductor pattern

141: Source

142: Drain

150, 160, 180: insulating layer

182: Depression

182a: First surface

182b: side

170: Common electrode

172: Conductive pattern

190: pixel electrode

192: slit

194: Bulge

200: Opposite substrate

210: second base

220: shading pattern

230: Color filter layer

240: Spacer

300: display medium

D: depth

GI: Gate insulation layer

H: height

T: Active component

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the invention. 2 is a schematic cross-sectional view of a display panel according to a second embodiment of the invention. 3 is a schematic cross-sectional view of a display panel according to a third embodiment of the invention.

10: Display panel

100: Active component substrate

110: first substrate

120: gate

130: semiconductor pattern

141: Source

142: Drain

150, 160, 180: insulating layer

182: Depression

182a: First surface

182b: side

170: Common electrode

190: pixel electrode

192: slit

200: Opposite substrate

210: second base

220: shading pattern

230: Color filter layer

240: Spacer

300: display medium

GI: Gate insulation layer

T: Active component

Claims (8)

A display panel includes: a first substrate; an active element arranged on the first substrate; a first insulating layer arranged on the active element; a pixel electrode, a common electrode, and a second insulating layer , Disposed on the first insulating layer, wherein the pixel electrode is electrically connected to the active device, the second insulating layer is disposed between the pixel electrode and the common electrode, and the second insulating layer has a first Surface and a side surface, and the first surface and the side surface are connected to define a recess of the second insulating layer; a second substrate is disposed opposite to the first substrate; a spacer is disposed on the second substrate On the substrate, wherein the vertical projection of the spacer on the first substrate overlaps the vertical projection of the second insulating layer on the recess on the first substrate; a display medium is disposed on the first substrate and the second substrate Between the substrates; and a conductive pattern disposed between the first insulating layer and the second insulating layer, and is a part of the common electrode; wherein the vertical projection of the conductive pattern on the first substrate and the second The vertical projections of the insulating layer on the first substrate overlap. The display panel as described in claim 1, wherein the spacer extends into the recess of the second insulating layer. The display panel described in item 1 of the scope of patent application further includes: A protrusion is arranged in the depression of the second insulating layer, wherein the spacer and the protrusion abut against each other. According to the display panel described in claim 3, the protrusion has a height H, the recess of the second insulating layer has a depth D, and H>D. The display panel according to claim 3, wherein the protrusion has a height H, the depression of the second insulating layer has a depth D, the display medium has a thickness G, and

. A display panel includes: a first substrate; an active element arranged on the first substrate; a pixel electrode arranged on the first substrate and electrically connected to the active element; an insulating layer arranged On the first substrate, wherein the insulating layer has a first surface and a side surface, and the first surface and the side surface are connected to define a recess of the insulating layer; a protrusion disposed on the insulating layer In the recess; a second substrate disposed opposite to the first substrate; a spacer disposed on the second substrate, wherein the spacer and the protrusion abut each other; a display medium disposed on Between the first substrate and the second substrate; and A conductive pattern, wherein the insulating layer is disposed between the spacer and the conductive pattern, and the conductive pattern is a part of a common electrode; wherein the vertical projection of the conductive pattern on the first substrate and the insulating layer The vertical projections recessed on the first substrate overlap. According to the display panel of claim 6, wherein the protrusion has a height H, the recess of the insulating layer has a depth D, and H>D. The display panel according to claim 6, wherein the protrusion has a height H, the recess of the insulating layer has a depth D, the display medium has a thickness G, and

.

Images