TWI871863B - Display device - Google Patents

Abstract

A display device includes plural scan lines, plural data lines, plural pixel structures, plural first common electrode lines and plural second common electrode lines. Each pixel structure includes a switch element, a first electrode and a second electrode. The switch element is electrically connected to a corresponding scan line and a corresponding data line. The first electrode is electrically connected to the switch element. The second electrode is overlapped with the first electrode. The first common electrode lines and the second common electrode lines extend along a first direction and are alternatively arranged along a second direction intersecting the first direction. Two second electrodes of two pixel structures adjacent along the first direction are separated from each other and electrically connected to a corresponding first common electrode line and a corresponding second common electrode line, respectively.

Description

Display device

The present invention relates to an optoelectronic device, and in particular to a display device.

Generally speaking, the common electrode of a liquid crystal display device adopts a surface electrode design, that is, the common electrodes of all sub-pixels are connected, so it is impossible to independently give each sub-pixel a different common electrode potential. However, in special designs, such as common electrode swing designs, polarity inversion is required to drive multiple sub-pixels in a frame in different frames. At this time, each sub-pixel needs a common electrode potential that can be independently controlled.

The present invention provides a display device capable of independently controlling the common electrode potential of each pixel structure.

An embodiment of the present invention provides a display device, comprising: a first substrate, a plurality of scan lines, a plurality of data lines, a plurality of pixel structures, a plurality of first common electrode lines, and a plurality of second common electrode lines. The plurality of scan lines, the plurality of data lines, and the plurality of pixel structures are disposed on the first substrate. Each of the pixel structures comprises: a switch element, a first electrode, and a second electrode. The switch element is electrically connected to the corresponding scan line and the corresponding data line. The first electrode is electrically connected to the switch element. The second electrode overlaps the first electrode. The plurality of first common electrode lines and the plurality of second common electrode lines extend along a first direction and are alternately arranged along a second direction intersecting the first direction. The two second electrodes of the two pixel structures adjacent to each other along the first direction are separated from each other and are respectively electrically connected to the corresponding first common electrode line and the corresponding second common electrode line.

In one embodiment of the present invention, the above-mentioned plurality of pixel structures constitute a plurality of rows of pixel units extending along the first direction and arranged along the second direction, and each row of pixel units overlaps a corresponding first common electrode line and a corresponding second common electrode line at the same time.

In one embodiment of the present invention, the plurality of pixel structures are formed into a plurality of rows of pixel units extending along the first direction and arranged along the second direction, and each row of pixel units overlaps a corresponding first common electrode line or a corresponding second common electrode line.

In an embodiment of the present invention, the potentials of the plurality of first common electrode lines and the plurality of second common electrode lines are different.

In one embodiment of the present invention, the polarities of adjacent pixel structures along the first direction are different.

In one embodiment of the present invention, the plurality of first common electrode lines and the plurality of second common electrode lines overlap scanning lines.

In one embodiment of the present invention, the plurality of first common electrode lines and the plurality of scanning lines belong to different film layers.

In one embodiment of the present invention, the plurality of second common electrode lines and the plurality of first common electrode lines belong to different film layers.

In an embodiment of the present invention, the plurality of first common electrode lines and the plurality of second common electrode lines are physically in contact with the corresponding second electrodes respectively.

In one embodiment of the present invention, the second electrode overlaps the corresponding scanning line and the two first electrodes located on both sides of the corresponding scanning line.

In an embodiment of the present invention, the display device further includes a shielding layer, and the shielding layer overlaps a plurality of data lines.

In one embodiment of the present invention, the shielding layer overlaps the gap between the second electrodes.

In one embodiment of the present invention, the shielding layer and the first electrode belong to the same film layer.

In one embodiment of the present invention, the shielding layer is electrically connected to the second electrode.

In one embodiment of the present invention, the display device further includes an out-of-plane common electrode line, and the shielding layer is electrically connected to the out-of-plane common electrode line.

In an embodiment of the present invention, the display device further includes a spacer, and the spacer overlaps the first common electrode line or the second common electrode line.

In order to make the above features and advantages of the present invention more clearly understood, embodiments are specifically cited below and described in detail with reference to the accompanying drawings.

In the accompanying drawings, for the sake of clarity, the thickness of layers, films, panels, regions, etc. is magnified. Throughout the specification, the same figure markings represent the same elements. 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 another element, or an intermediate element can also exist. On the contrary, when an element is referred to as being "directly on" or "directly connected to" another element, there is no intermediate element. As used herein, "connection" can refer to physical and/or electrical connection. Furthermore, "electrical connection" or "coupling" can be the presence of other elements between two elements.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or portions, these elements, components, regions, layers and/or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or portion from another element, component, region, layer or portion. Therefore, the first "element", "component", "region", "layer" or "portion" discussed below can be referred to as a second element, component, region, layer or portion without departing from the teachings of this article.

The terms used herein are for the purpose of describing specific embodiments only and are not restrictive. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms, including "at least one" or to mean "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the relevant listed items. It should also be understood that when used in this specification, the terms "include" and/or "include" specify the presence of the features, regions, wholes, steps, operations, elements and/or parts, but do not exclude the presence or addition of one or more other features, regions, wholes, steps, operations, elements, parts and/or combinations thereof.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one figure is flipped, the elements described as being on the "lower" side of the other elements will be oriented on the "upper" side of the other elements. Therefore, the exemplary term "lower" can include both "lower" and "upper" orientations, depending on the specific orientation of the figure. Similarly, if the device in one figure is flipped, the elements described as being "lower" or "below" other elements will be oriented as being "above" other elements. Therefore, the exemplary term "lower" or "below" can include both above and below orientations.

As used herein, "about," "approximately," or "substantially" includes the stated value and the average value within an acceptable deviation range of the particular value determined by a person of ordinary skill in the art, taking into account the measurement in question and the particular amount of error associated with the measurement (i.e., the limitations 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, as used herein, "about," "approximately," or "substantially" can select a more acceptable deviation range or standard deviation depending on the optical property, etching property, or other property, and can apply to all properties without a single standard deviation.

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

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

FIG. 1A is a partial top view of a display device 10 according to an embodiment of the present invention. FIG. 1B is a cross-sectional view taken along the section line A-A' of FIG. 1A. Referring to FIG. 1A and FIG. 1B simultaneously, the display device 10 includes: a first substrate 110, a plurality of scan lines 120 and a plurality of data lines 130, a plurality of pixel structures 140, and a plurality of first common electrode lines 151 and a plurality of second common electrode lines 152. The plurality of scan lines 120 and the plurality of data lines 130 are disposed on the first substrate 110. The plurality of pixel structures 140 are disposed on the first substrate 110, and each pixel structure 140 includes: a switch element SW, a first electrode E1, and a second electrode E2. The switch element SW is electrically connected to the corresponding scan line 120 and the corresponding data line 130. The first electrode E1 is electrically connected to the switch element SW. The second electrode E2 overlaps the first electrode E1. A plurality of first common electrode lines 151 and a plurality of second common electrode lines 152 extend along a first direction D1 and are alternately arranged along a second direction D2 intersecting the first direction D1, wherein the second electrodes E2 of the pixel structures 140 adjacent to each other along the first direction D1 are separated from each other and electrically connected to the corresponding first common electrode line 151 and the corresponding second common electrode line 152, respectively.

In this embodiment, by separating the second electrodes E2 of the pixel structures 140 adjacent to each other along the first direction D1 and electrically connecting the corresponding first common electrode lines 151 and second common electrode lines 152, different potentials can be given to the second electrodes E2 of the pixel structures 140 adjacent to each other along the first direction D1. The following will further describe the implementation of each element and film layer of the display device 10 with reference to the drawings, but the present invention is not limited thereto.

Please refer to FIG. 1A and FIG. 1B at the same time. The first substrate 110 of the display device 10 may be a transparent substrate, and its material includes, for example, quartz, glass, or polymer, but the present disclosure is not limited thereto. Various film layers for forming signal lines, driving elements, switch elements, storage capacitors, etc. may be disposed on the first substrate 110. In some embodiments, the display device 10 may include another substrate (such as a second substrate) and a display medium disposed between the first substrate 110 and the second substrate, but FIG. 1A and FIG. 1B omit the second substrate and the display medium for clarity of the drawings.

In some embodiments, the plurality of scanning lines 120 of the display device 10 extend along the first direction D1 and are arranged along the second direction D2. In some embodiments, the first direction D1 is perpendicular to the second direction D2, but the disclosure is not limited thereto. In some embodiments, the plurality of data lines 130 of the display device 10 extend along the second direction D2 and are arranged along the first direction D1.

In some embodiments, the display device 10 includes a plurality of pixel units PU, the plurality of pixel units PU may be arranged along the second direction D2, and each pixel unit PU may include a plurality of pixel structures 140 arranged along the first direction D1. In some embodiments, each pixel structure 140 may be a sub-pixel of the display device 10, and three pixel structures 140 may constitute a pixel of the display device 10, but the disclosure is not limited thereto. In some embodiments, four or more pixel structures 140 may constitute a pixel of the display device 10.

In some embodiments, the switch element SW of the pixel structure 140 includes a gate GE, a semiconductor layer CH, a source SE, and a drain DE. The gate GE overlaps the semiconductor layer CH and is electrically connected to the scanning line 120. The region where the semiconductor layer CH overlaps the gate GE can be regarded as a channel region of the switch element SW. The source SE and the drain DE are separated from each other, and the source SE is electrically connected to the data line 130 and the semiconductor layer CH, and the drain DE is electrically connected to the semiconductor layer CH and the first electrode E1. The switch element SW can be turned on or off by the signal transmitted by the scanning line 120, and when the switch element SW is turned on, the signal transmitted by the data line 130 can be transmitted to the first electrode E1. The first electrode E1 can be used as a pixel electrode of the display device 10.

The gate GE and the scan line 120 of the switch element SW may belong to the same film layer, the source SE and the drain DE and the data line 130 may belong to the same film layer, and the materials of the gate GE, the scan line 120, the source SE, the drain DE and the data line 130 may include metals with good conductivity, such as chromium, gold, silver, copper, tin, lead, cobalt, tungsten, molybdenum, neodymium, titanium, tantalum, aluminum, zinc, etc., or alloys of the above metals, oxides of the above metals, nitrides of the above metals, or combinations of the above materials or other conductive materials, but the present disclosure is not limited thereto. The semiconductor layer CH may include doped or undoped semiconductor materials, such as silicon semiconductor materials (such as polycrystalline silicon, amorphous silicon, etc.), oxide semiconductor materials, organic semiconductor materials, etc.

The display device 10 may further include a gate insulating layer GI, which may be disposed on the first substrate 110, and the gate insulating layer GI may be configured between the gate GE of each switch element SW and the semiconductor layer CH. In some embodiments, the gate insulating layer GI is also located between the source SE and the drain DE and the gate GE to avoid unnecessary short circuits between the components. Although the gate GE shown in FIG. 1B is located below the semiconductor layer CH, the switch element SW is a bottom gate transistor. However, in other embodiments, the gate GE may also be located above the semiconductor layer CH, so that the switching element SW is a top gate transistor.

In some embodiments, a buffer layer may be disposed between the gate GE and the scanning line 120 and the substrate 110 to enhance adhesion between the gate GE and the scanning line 120 and the first substrate 110.

In some embodiments, the display device 10 further includes an insulating layer I1, a planar layer PL, and an insulating layer I2. The insulating layer I1 may be located between the source SE, the drain DE, and the data line 130 and the planar layer PL. The planar layer PL may be located between the gate insulating layer GI and the insulating layer I1 and the insulating layer I2. The insulating layer I2 may be located between the first electrode E1 and the second electrode E2. The materials of the gate insulating layer GI, the insulating layer I1, and the insulating layer I2 may include transparent inorganic insulating materials, such as silicon oxide, silicon nitride, silicon oxynitride, etc., but the present disclosure is not limited thereto. In some embodiments, the planar layer PL includes transparent organic insulating materials, such as acrylic, siloxane, polyimide, epoxy, etc., but the present disclosure is not limited thereto.

In some embodiments, the first electrode E1 is located between two adjacent scan lines 120 and between two adjacent data lines 130 from a top view, and the first electrode E1 may have a plurality of slits ST. In some embodiments, the plurality of slits ST extend substantially parallel to the data lines 130, but the present disclosure is not limited thereto. In some embodiments, the extension direction of the plurality of slits ST may intersect with the extension direction of the data lines 130. In some embodiments, the plurality of slits ST extend substantially perpendicular to the data lines 130. In some embodiments, the plurality of slits ST are substantially parallel to each other. In some embodiments, the display device 10 further includes a through hole V1, which may penetrate the insulating layer I2, the planar layer PL, and the insulating layer I1, and the first electrode E1 may be electrically connected to the drain electrode DE through the through hole V1.

In some embodiments, from a top view, the second electrode E2 is located between two adjacent scan lines 120 and between two adjacent data lines 130. In some embodiments, multiple second electrodes E2 belong to the same film layer, and each second electrode E2 can be a block electrode. In other words, multiple second electrodes E2 belonging to the same film layer can be physically separated from each other. In some embodiments, each second electrode E2 overlaps the corresponding first electrode E1. The second electrode E2 can serve as a common electrode of the display device 10. When driven by an electric field, the electric field formed between the first electrode E1 and the second electrode E2 can pass through the slit ST in the first electrode E1 to drive the display medium. In some embodiments, the display device 10 further includes a through hole V2, which can penetrate the planar layer PL and the gate insulating layer GI, and the second electrode E2 can be electrically connected to the first common electrode line 151 or the second common electrode line 152 through the through hole V2. In some embodiments, the second electrode E2 is located between the first electrode E1 and the first substrate 110, but the present disclosure is not limited thereto. In some embodiments, the first electrode E1 can be located between the second electrode E2 and the first substrate 110. The materials of the first electrode E1 and the second electrode E2 may include a transparent conductive material, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium gallium zinc oxide, or a stacked layer of at least two of the above, but the present disclosure is not limited thereto.

In some embodiments, the first common electrode lines 151 and the second common electrode lines 152 of the display device 10 extend along the first direction D1 and are alternately arranged along the second direction D2. In some embodiments, the first common electrode lines 151 are parallel to the second common electrode lines 152. In some embodiments, the first common electrode lines 151 and the second common electrode lines 152 are parallel to the scanning lines 120. In some embodiments, the first common electrode lines 151 and the second common electrode lines 152 and the scanning lines 120 belong to the same film layer. In some embodiments, the first common electrode lines 151 and the second common electrode lines 152 intersect with the data lines 130.

In some embodiments, a set of adjacent first common electrode lines 151 and second common electrode lines 152 overlap the corresponding pixel unit PU. In other words, each pixel unit PU can overlap a corresponding first common electrode line 151 and a corresponding second common electrode line 152. In some embodiments, a set of adjacent first common electrode lines 151 and second common electrode lines 152 overlap the overlapping area of the first electrode E1 and the second electrode E2 in the corresponding pixel unit PU, that is, the opening area of the pixel structure 140. In some embodiments, the first common electrode line 151 and the second common electrode line 152 can provide different voltages, and the second electrodes E2 of multiple pixel structures 140 arranged along the first direction D1 in each pixel unit PU can be alternately electrically connected to the first common electrode line 151 and the second common electrode line 152, so that the second electrodes E2 of the pixel structures 140 adjacent to each other along the first direction D1 have different voltages.

In some embodiments, the first electrodes E1 of the plurality of pixel structures 140 arranged along the first direction D1 in each pixel unit PU are respectively electrically connected to the plurality of data lines 130 arranged along the first direction D1. In some embodiments, the plurality of data lines 130 arranged along the first direction D1 may alternately have different voltages, so that the first electrodes E1 of the pixel structures 140 adjacent to each other along the first direction D1 can receive different voltages. In this way, by individually controlling the voltages of the first electrode E1 and the second electrode E2 of each pixel structure 140, each pixel structure 140 can have a desired polarity. In some embodiments, the pixel structures 140 adjacent to each other along the first direction D1 have different polarities.

In the following, other embodiments of the present invention are further described using FIGS. 2A to 11 , and the component numbers and related contents of the embodiment of FIGS. 1A to 1B are used, wherein the same number is used to represent the same or similar components, and the description of the same technical contents is omitted. For the description of the omitted parts, reference can be made to the embodiment of FIGS. 1A to 1B , and they will not be repeated in the following description.

FIG. 2A is a partial top view of a display device 20, 30 according to an embodiment of the present invention. FIG. 2B is a cross-sectional view taken along the section line B-B' of FIG. 2A. Referring to FIG. 2A and FIG. 2B simultaneously, the display device 20 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, and a plurality of second common electrode lines 252.

The main difference between the display device 20 shown in FIGS. 2A to 2B and the display device 10 shown in FIGS. 1A to 1B is that the first common electrode line 251 and the second common electrode line 252 of the display device 20 can overlap the scanning line 120, so as to increase the aperture ratio of the display device 20. For example, the first common electrode line 251 can substantially overlap the scanning line 120, and the second common electrode line 252 can partially overlap the scanning line 120 and be located in the area between the switch element SW and the first electrode E1.

In some embodiments, the first common electrode line 251 may further include a plurality of protrusions PT1, and the second common electrode line 252 may further include a plurality of protrusions PT2. In some embodiments, the protrusions PT1 and PT2 may not overlap the switch element SW, but the present disclosure is not limited thereto. In some embodiments, conductive vias may be provided on the protrusions PT1 and PT2 for electrical connection. In some embodiments, the protrusions PT1 and PT2 may overlap the switch elements SW of a plurality of pixel structures 140, respectively. In some embodiments, the protrusions PT1 and PT2 may completely overlap the channel region of the switch element SW to help prevent the characteristics of the channel region from being affected by the irradiation of external light.

In addition, in the present embodiment, the first common electrode line 251 and the second common electrode line 252 of the display device 20 may belong to different film layers from the scanning line 120, so as to increase the opening rate of the display device 20. For example, the first common electrode line 251 and the second common electrode line 252 may belong to the same film layer, and the first common electrode line 251 and the second common electrode line 252 may be located between the first electrode E1 and the second electrode E2. In some embodiments, the first common electrode line 251 and the second common electrode line 252 are formed on the second electrode E2, and the first common electrode line 251 and the second common electrode line 252 are respectively physically in contact with the corresponding second electrode E2. As a result, the display device 20 may not need to form the through hole V2 as shown in FIG. 1B .

In some embodiments, each pixel unit PU overlaps a set of adjacent first common electrode lines 251 and second common electrode lines 252. In some embodiments, the first common electrode lines 251 and the second common electrode lines 252 can provide different voltages, and the second electrodes E2 of a plurality of pixel structures 140 arranged along the first direction D1 in each pixel unit PU can be alternately electrically connected to the corresponding first common electrode lines 251 and the corresponding second common electrode lines 252, so that the second electrodes E2 of the pixel structures 140 adjacent to each other along the first direction D1 have different voltages. In some embodiments, the second electrodes E2 of the pixel structures 140 alternately arranged along the first direction D1 can be physically connected to each other, and then electrically connected to the corresponding first common electrode lines 251 or the corresponding second common electrode lines 252. For example, the second second electrode E2 and the fourth second electrode E2 arranged along the first direction D1 in Figure 2A can be physically connected to each other through the overlapping portion of the first common electrode line 251, and the overlapping portion of the first common electrode line 251 can be electrically connected to the overlapping first common electrode line 251 through, for example, a through hole arranged elsewhere.

3 is a partial cross-sectional schematic diagram of a display device 30 according to an embodiment of the present invention. Referring to FIG2A and FIG3 , the display device 30 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, and a plurality of second common electrode lines 252.

The main difference between the display device 30 shown in FIGS. 2A and 3 and the display device 20 shown in FIGS. 2A to 2B is that the first common electrode line 251 and the second common electrode line 252 of the display device 30 may be located between the second electrode E2 and the first substrate 110. In some embodiments, the second electrode E2 of each pixel structure 140 is formed on the corresponding first common electrode line 251 or the second common electrode line 252, and each second electrode E2 physically contacts the corresponding first common electrode line 251 or the second common electrode line 252.

FIG4 is a partial top view of a display device 40 according to an embodiment of the present invention. Referring to FIG4 , the display device 40 includes: a first substrate 110 , a plurality of scanning lines 120 , a plurality of data lines 130 , a plurality of pixel structures 140 , a plurality of first common electrode lines 251 , and a plurality of second common electrode lines 152 .

The main difference between the display device 40 shown in FIG. 4 and the display device 10 shown in FIG. 1A to FIG. 1B is that the display device 40 uses the plurality of first common electrode lines 251 of the display device 20 shown in FIG. 2A to FIG. 2B instead of the plurality of first common electrode lines 151. In other words, the plurality of first common electrode lines 251 of the display device 40 may belong to a different film layer from the scanning line 120 and substantially overlap the scanning line 120, while the plurality of second common electrode lines 152 of the display device 40 may belong to the same film layer as the scanning line 120 and overlap the corresponding region where the first electrode E1 and the second electrode E2 overlap. In some embodiments, among the plurality of pixel structures 140 arranged along the first direction D1 of the pixel unit PU, the odd-numbered second electrodes E2 may be electrically connected to the first common electrode line 251 on the upper side of the pixel unit PU, and the even-numbered second electrodes E2 may be electrically connected to the second common electrode line 152 of the overlapping pixel unit PU. In some embodiments, the first common electrode line 251 includes a plurality of protrusions PT1. In some embodiments, the plurality of protrusions PT1 may not overlap the switch elements SW of the plurality of pixel structures 140, but the present disclosure is not limited thereto. In some embodiments, the plurality of protrusions PT1 may overlap the channel regions of the switch elements SW of the plurality of pixel structures 140, respectively, so as to prevent the characteristics of the channel region from being affected by the irradiation of external light.

FIG5 is a partial top view of a display device 50 according to an embodiment of the present invention. Referring to FIG5 , the display device 50 includes: a first substrate 110 , a plurality of scanning lines 120 , a plurality of data lines 130 , a plurality of pixel structures 140 , a plurality of first common electrode lines 151 , and a plurality of second common electrode lines 152 .

The main difference between the display device 50 shown in FIG5 and the display device 10 shown in FIG1A to FIG1B is that each pixel unit PU of the display device 50 overlaps only a corresponding first common electrode line 151 or a second common electrode line 152. For example, the pixel unit PU of the display device 50 may include a plurality of pixel units PU1 and a plurality of pixel units PU2, and the plurality of pixel units PU1 and the plurality of pixel units PU2 may be arranged alternately along the second direction D2. The plurality of first common electrode lines 151 may overlap the plurality of pixel units PU1, respectively, and the plurality of second common electrode lines 152 may overlap the plurality of pixel units PU2, respectively.

In some embodiments, the second electrode E2 in the pixel unit PU1 electrically connected to the overlapping first common electrode line 151 is also connected to the adjacent second electrode E2 in the adjacent pixel unit PU2 electrically connected to the same first common electrode line 151. In some embodiments, the second electrode E2 in the pixel unit PU1 electrically connected to the second common electrode line 152 of the overlapping adjacent pixel unit PU2 is also connected to the adjacent second electrode E2 in the adjacent pixel unit PU2 electrically connected to the same second common electrode line 152. For example, the pixel structure 141a of the pixel unit PU1 is adjacent to the pixel structure 142a of the pixel unit PU2a, and the pixel structure 141a may include a first electrode E1, a second electrode E21a, and a switch element SW, and the pixel structure 142a may include a first electrode E1, a second electrode E22a, and a switch element SW. In some embodiments, the second electrode E21a of the pixel structure 141a and the second electrode E22a of the pixel structure 142a are both electrically connected to the second common electrode line 152 of the overlapping pixel unit PU2a. In some embodiments, the pixel structure 140 of the display device 50 may include a pixel structure 141a and a pixel structure 142a, and the second electrode E2 of the pixel structure 140 may include a second electrode E21a, a second electrode E22a, and a connecting portion CPa, wherein the second electrode E21a is connected to the second electrode E22a through the connecting portion CPa. In some embodiments, the connecting portion CPa overlaps the corresponding scanning line 120, and the second electrode E21a and the second electrode E22a respectively overlap the two first electrodes E1 on both sides of the corresponding scanning line 120. In some embodiments, the connecting portion CPa overlaps the switch element SW of the pixel structure 141a.

In some embodiments, the pixel structure 141b of the pixel unit PU1 is adjacent to the pixel structure 141a, and the pixel structure 141b is adjacent to the pixel structure 142b of the pixel unit PU2b, and the pixel structure 141b may include a first electrode E1, a second electrode E21b, and a switch element SW, and the pixel structure 142b may include a first electrode E1, a second electrode E22b, and a switch element SW. In some embodiments, the second electrode E21b of the pixel structure 141b and the second electrode E22b of the pixel structure 142b are both electrically connected to the first common electrode line 151 of the overlapping pixel unit PU1. In some embodiments, the pixel structure 140 of the display device 50 may include a pixel structure 141b and a pixel structure 142b, and the second electrode E2 of the pixel structure 140 may include a second electrode E21b, a second electrode E22b, and a connecting portion CPb, wherein the second electrode E21b is connected to the second electrode E22b through the connecting portion CPb. In some embodiments, the connecting portion CPb overlaps the corresponding scanning line 120, and the second electrode E21b and the second electrode E22b respectively overlap the two first electrodes E1 on both sides of the corresponding scanning line 120. In some embodiments, the connecting portion CPb overlaps the switch element SW of the pixel structure 142b. In some embodiments, the pixel unit PU1 is located between the pixel unit PU2a and the pixel unit PU2b. In some embodiments, the polarity of the pixel structure 141a is the same as that of the pixel structure 142a, the polarity of the pixel structure 141b is the same as that of the pixel structure 142b, and the polarity of the pixel structure 141a is different from that of the pixel structure 141b.

FIG6A is a partial top view of a display device 60 according to an embodiment of the present invention. FIG6B is a cross-sectional view taken along the section line C-C' of FIG6A. Referring to FIG6A and FIG6B simultaneously, the display device 60 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, and a plurality of second common electrode lines 252.

The main difference between the display device 60 shown in FIGS. 6A to 6B and the display device 20 shown in FIGS. 2A to 2B is that each pixel unit PU of the display device 60 overlaps only a corresponding first common electrode line 251 or a corresponding second common electrode line 252. For example, the plurality of first common electrode lines 251 and the plurality of second common electrode lines 252 of the display device 60 may be alternately arranged along the second direction D2, and the first common electrode lines 251 and the second common electrode lines 252 respectively overlap corresponding scanning lines 120. In some embodiments, the first common electrode line 251 includes a plurality of protrusions PT1, and the second common electrode line 252 includes a plurality of protrusions PT2. In some embodiments, the protrusions PT1 and PT2 overlap the corresponding switch elements SW, but the present disclosure is not limited thereto.

In some embodiments, any two pixel structures 140 adjacent to each other along the second direction D2 belong to adjacent pixel units PU, respectively. In some embodiments, the second electrodes E2 of any two pixel structures 140 adjacent to each other along the second direction D2 may be electrically connected to the same first common electrode line 251 or the same second common electrode line 252. In some embodiments, the second electrodes E2 of any two pixel structures 140 adjacent to each other along the second direction D2 may be connected to each other through a connection portion CP. In some embodiments, each connection portion CP overlaps a protrusion PT1 of the first common electrode line 251 or a protrusion PT2 of the second common electrode line 252.

In some embodiments, the display device 60 further includes a second substrate 610, a display medium layer 620, and a spacer PS, wherein the second substrate 610 is opposite to the first substrate 110, and the second substrate 610 can be a transparent substrate, such as a quartz substrate, a glass substrate, a polymer substrate, etc. The display medium layer 620 is located between the plurality of pixel structures 140 on the first substrate 110 and the second substrate 610, and the display medium layer 620 can include display materials such as liquid crystal materials, electrophoretic materials, or electro-wetting materials. In some embodiments, the spacer PS is disposed on the second substrate 610 and protrudes from the second substrate 610 toward the first substrate 110, so as to maintain a stable substrate gap (cell gap) between the first substrate 110 and the second substrate 610. In some embodiments, the spacer PS overlaps the first common electrode line 251 or the second common electrode line 252. In some embodiments, the spacer PS overlaps the protrusion PT1 of the first common electrode line 251 or the protrusion PT2 of the second common electrode line 252. In this embodiment, the first substrate 110 may be provided with various film layers as shown in FIG. 2B , but FIG. 6B omits a plurality of film layers and only shows the first common electrode line 251 to clearly present the arrangement relationship between the protrusion PT1 of the first common electrode line 251 and the spacer PS. In some embodiments, the thickness of the first common electrode line 251 or the second common electrode line 252 is about ten times or more than the thickness of the first electrode E1 or the second electrode E2, so that the surface of the first substrate 110 contacting the display medium layer 620 has a protruding profile. In this way, the spacer PS can press against the protruding contour to prevent other film layers from being scratched when the display device 60 slides.

FIG. 7A is a partial top view of a display device 70 according to an embodiment of the present invention. FIG. 7B is a cross-sectional view taken along the section line D-D' of FIG. 7A. Referring to FIG. 7A and FIG. 7B simultaneously, the display device 70 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, and a plurality of second common electrode lines 252.

The main difference between the display device 70 shown in FIGS. 7A to 7B and the display device 60 shown in FIG. 6 is that the display device 70 further includes a shielding layer SL, which can overlap the data line 130 to shield the electric field of the data line 130 and avoid dark-state light leakage. In some embodiments, the shielding layer SL and the first electrode E1 belong to the same film layer. In some embodiments, the shielding layer SL and the first electrode E1 belong to different film layers (not shown). In some embodiments, the shielding layer SL overlaps the gap GP between the second electrodes E2 of the adjacent pixel structures 140. In some embodiments, the shielding layer SL is electrically connected to the second electrode E2, so that the shielding layer SL and the second electrode E2 have the same potential.

For example, the first common electrode line 251 is located between the insulating layer I2 and the second electrode E2, and the first common electrode line 251 is electrically connected to or physically contacts the second electrode E2. In addition, the insulating layer I2 may be located between the shielding layer SL and the first common electrode line 251, and the shielding layer SL may be electrically connected to the first common electrode line 251 through a through hole V3 in the insulating layer I2, for example, electrically connected to the protrusion PT1 of the first common electrode line 251. In other words, the shielding layer SL may be electrically connected to the second electrode E2 through the first common electrode line 251. In some embodiments, the vias V3 may be alternately disposed on the protrusions PT1 of the first common electrode line 251, and the vias V3 may be alternately disposed on the protrusions PT2 of the second common electrode line 252. In some embodiments, when the first common electrode line 251 has a sufficient line width, the vias V3 may be disposed on the first common electrode line 251, and the protrusions PT1 may not be disposed on the first common electrode line 251. Similarly, when the second common electrode line 252 has a sufficient line width, the vias V3 may be disposed on the second common electrode line 252, and the protrusions PT2 may not be disposed on the second common electrode line 252.

Fig. 8 is a partial cross-sectional schematic diagram of a display device 80 according to an embodiment of the present invention. Referring to Fig. 8, the display device 80 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, a plurality of second common electrode lines 252, and a shielding layer SL.

The main difference between the display device 80 shown in FIG8 and the display device 70 shown in FIGS. 7A to 7B is that the first common electrode line 251 and the second common electrode line 252 of the display device 80 can be located between the second electrode E2 and the first substrate 110. In some embodiments, the second electrode E2 of each pixel structure 140 is formed on the corresponding first common electrode line 251 or the second common electrode line 252. In some embodiments, each second electrode E2 physically contacts the corresponding first common electrode line 251 or the second common electrode line 252. In some embodiments, the through hole V3 in the insulating layer I2 can overlap the first common electrode line 251 and the second electrode E2. In some embodiments, the shielding layer SL may physically contact the first common electrode line 251 and the second electrode E2.

FIG. 9A is a partial top view of a display device 90, 100 according to an embodiment of the present invention. FIG. 9B is a cross-sectional view taken along the section line E-E' of FIG. 9A. Referring to FIG. 9A and FIG. 9B simultaneously, the display device 90 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, a plurality of second common electrode lines 252, and a shielding layer SL.

The main difference between the display device 90 shown in FIGS. 9A to 9B and the display device 70 shown in FIGS. 7A to 7B is that the shielding layer SL of the display device 90 may not be electrically connected to the second electrode E2 through the first common electrode line 251. For example, the shielding layer SL may be electrically connected to the second electrode E2 through the through hole V3 in the insulating layer I2. In some embodiments, the shielding layer SL physically contacts the second electrode E2. In some embodiments, the shielding layer SL does not overlap the first common electrode line 251. In some embodiments, the first common electrode line 251 is not provided with a protrusion PT1. In some embodiments, the second common electrode line 252 is not provided with a protrusion PT2. In some embodiments, the shielding layer SL may be electrically connected to the first common electrode line 251 through the second electrode E2, and the shielding layer SL is not electrically connected to the second common electrode line 252. In some embodiments, the via V3 is disposed adjacent to one of the first common electrode line 251 and the second common electrode line 252. For example, the via V3 may be adjacent to the first common electrode line 251 and away from the second common electrode line 252.

FIG10 is a partial cross-sectional schematic diagram of a display device 100 according to an embodiment of the present invention. Referring to FIG9A and FIG10 , the display device 100 includes: a first substrate 110, a plurality of scanning lines 120, a plurality of data lines 130, a plurality of pixel structures 140, a plurality of first common electrode lines 251, a plurality of second common electrode lines 252, and a shielding layer SL.

The main difference between the display device 100 shown in FIGS. 9A and 10 and the display device 90 shown in FIGS. 9A to 9B is that the first common electrode line 251 and the second common electrode line 252 of the display device 100 may be located between the second electrode E2 and the first substrate 110. In some embodiments, the second electrode E2 of each pixel structure 140 is formed on the corresponding first common electrode line 251 or the second common electrode line 252. In some embodiments, each second electrode E2 physically contacts the corresponding first common electrode line 251 or the second common electrode line 252.

Fig. 11 is a partial cross-sectional schematic diagram of a display device 200 according to an embodiment of the present invention. In order to make the diagram more concise, Fig. 11 schematically shows the first substrate 110 and the shielding layer SL, and omits other components.

The main difference between the display device 200 shown in FIG. 11 and the display device 70 shown in FIGS. 7A to 7B is that the display device 200 further includes an out-of-plane common electrode line MC located in the peripheral area NA, and the shielding layer SL is electrically connected to the out-of-plane common electrode line MC. In some embodiments, the shielding layer SL is directly connected to the out-of-plane common electrode line MC. In some embodiments, the shielding layer SL does not need to be electrically connected to the second electrode E2, the first common electrode line 251, or the second common electrode line 252. In some embodiments, the display device 200 does not need to be provided with a through hole V3. In some embodiments, the display device 200 further includes a display area AA, and the peripheral area NA surrounds the display area AA. In some embodiments, the shielding layer SL extends from the display area AA to the peripheral area NA and connects to the out-of-plane common electrode line MC.

In some embodiments, the display device 10 shown in FIGS. 1A to 1B , the display device 30 shown in FIG. 3 , the display device 40 shown in FIG. 4 , and the display device 50 shown in FIG. 5 may also include a shielding layer SL overlapping the data line 130 , and the shielding layer SL may be electrically connected to the out-of-plane common electrode line MC.

In summary, the display device of the present invention extends the first common electrode line and the second common electrode line along the first direction, and separates the second electrodes of two adjacent pixel structures along the first direction from each other and electrically connects the corresponding first common electrode line and second common electrode line respectively, so that the second electrodes of the adjacent pixel structures along the first direction can receive different potentials.

Although the present invention has been disclosed as above by the embodiments, they are not intended to limit the present invention. Any person with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of the attached patent application.

10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200: display device 110: first substrate 120: scanning line 130: data line 140, 141a, 141b, 142a, 142b: pixel structure 151, 251: first common electrode line 152, 252: second common electrode line 610: second substrate 620: display dielectric layer A-A’, B-B’, C-C’, D-D’, E-E’: section line AA: display area CH: semiconductor layer CP, CPa, CPb: connection part D1: first direction D2: second direction DE: drain E1: first electrode E2: second electrode GE: gate GI: gate insulation layer GP: gap I1, I2: insulation layer MC: out-of-plane common electrode line NA: peripheral area PL: flat layer PS: spacer PT1, PT2: protrusion PU, PU1, PU2, PU2a, PU2b: pixel unit SE: source SL: shielding layer ST: slit SW: switch element V1, V2, V3: through hole

FIG. 1A is a partial top view schematic diagram of a display device 10 according to an embodiment of the present invention. FIG. 1B is a cross-sectional schematic diagram taken along the section line A-A' of FIG. 1A. FIG. 2A is a partial top view schematic diagram of display devices 20, 30 according to an embodiment of the present invention. FIG. 2B is a cross-sectional schematic diagram taken along the section line B-B' of FIG. 2A. FIG. 3 is a partial cross-sectional schematic diagram of a display device 30 according to an embodiment of the present invention. FIG. 4 is a partial top view schematic diagram of a display device 40 according to an embodiment of the present invention. FIG. 5 is a partial top view schematic diagram of a display device 50 according to an embodiment of the present invention. FIG. 6A is a partial top view schematic diagram of a display device 60 according to an embodiment of the present invention. FIG. 6B is a schematic cross-sectional view taken along the section line C-C' of FIG. 6A. FIG. 7A is a schematic cross-sectional view of a display device 70 according to an embodiment of the present invention. FIG. 7B is a schematic cross-sectional view taken along the section line D-D' of FIG. 7A. FIG. 8 is a schematic cross-sectional view of a display device 80 according to an embodiment of the present invention. FIG. 9A is a schematic cross-sectional view of a display device 90, 100 according to an embodiment of the present invention. FIG. 9B is a schematic cross-sectional view taken along the section line E-E' of FIG. 9A. FIG. 10 is a schematic cross-sectional view of a display device 100 according to an embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a display device 200 according to an embodiment of the present invention.

10: Display device

110: First substrate

120: Scan line

130: Data line

140: Pixel structure

151: First common electrode line

152: Second common electrode line

A-A’: section line

CH: semiconductor layer

D1: First direction

D2: Second direction

DE: Drain

E1: First electrode

E2: Second electrode

GE: Gate

PU: Pixel Unit

SE: Source

ST: Slit

SW: switch element

V1, V2: through hole

Claims (15)

A display device includes: a first substrate; a plurality of scanning lines and a plurality of data lines disposed on the first substrate; a plurality of pixel structures disposed on the first substrate, and each of the pixel structures includes: a switch element electrically connected to the corresponding scanning line and the corresponding data line; a first electrode electrically connected to the switch element; and a second electrode overlapping the first electrode; a plurality of first common electrode lines and a plurality of second common electrode lines extending along a first direction and alternately arranged along a second direction intersecting the first direction, wherein two second electrodes of two adjacent pixel structures along the first direction are separated from each other and electrically connected to the corresponding first common electrode line and the corresponding second common electrode line respectively; and a spacer overlapping the first common electrode line or the second common electrode line. A display device as described in claim 1, wherein the plurality of pixel structures are formed into a plurality of rows of pixel units extending along the first direction and arranged along the second direction, and each row of the pixel units overlaps the corresponding first common electrode line and the corresponding second common electrode line at the same time. A display device as described in claim 1, wherein the plurality of pixel structures are formed into a plurality of rows of pixel units extending along the first direction and arranged along the second direction, and each row of the pixel units overlaps the corresponding first common electrode line or the corresponding second common electrode line. A display device as described in claim 1, wherein the potentials of the plurality of first common electrode lines and the plurality of second common electrode lines are different. A display device as described in claim 1, wherein the polarities of the pixel structures adjacent to each other along the first direction are different. A display device as described in claim 1, wherein the plurality of first common electrode lines and the plurality of second common electrode lines overlap the plurality of scanning lines. A display device as described in claim 1, wherein the plurality of first common electrode lines and the plurality of scanning lines belong to different film layers. A display device as described in claim 1, wherein the plurality of second common electrode lines and the plurality of first common electrode lines belong to different film layers. A display device as described in claim 1, wherein the plurality of first common electrode lines and the plurality of second common electrode lines respectively physically contact the corresponding second electrodes. A display device as described in claim 1, wherein the second electrode overlaps the corresponding scan line and the two first electrodes located on both sides of the corresponding scan line. The display device as described in claim 1 further includes a shielding layer, and the shielding layer overlaps the multiple data lines. A display device as described in claim 11, wherein the shielding layer overlaps the gap between the second electrodes. A display device as described in claim 11, wherein the shielding layer and the first electrode belong to the same film layer. A display device as described in claim 11, wherein the shielding layer is electrically connected to the second electrode. The display device as described in claim 11 further includes an out-of-plane common electrode line, and the shielding layer is electrically connected to the out-of-plane common electrode line.