CN110308596B

CN110308596B - Display device

Info

Publication number: CN110308596B
Application number: CN201910594194.5A
Authority: CN
Inventors: 谢曜安; 罗谚桦; 郭玉苹
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2018-12-06
Filing date: 2019-07-03
Publication date: 2022-03-01
Anticipated expiration: 2039-07-03
Also published as: TWI685697B; TW202022444A; CN110308596A

Abstract

A display device comprises a first display panel and a second display panel. The first display panel includes a first pixel array layer. The first pixel array layer comprises a plurality of first scanning lines, a plurality of first data lines and a plurality of first sub-pixel structures. The plurality of first scanning lines and the plurality of first data lines are staggered to enclose a plurality of first display opening areas. Each of the first subpixel structures includes a first pixel electrode. The first display opening area is divided into a first driving pixel area where the first pixel electrode is located and a first blank pixel area where the first pixel electrode does not exist. The second display panel is superposed with the first display panel. The second display panel includes a second pixel array layer having a plurality of second display opening areas, and one of the second display opening areas partially overlaps a first blank pixel area of one of the first display opening areas.

Description

Display device

Technical Field

The present invention relates to a display device, and more particularly, to a display device having a blank pixel region.

Background

With the development of technology, in the original pixel structure of three-color sub-pixels (red sub-pixel, green sub-pixel and blue sub-pixel), the white sub-pixel can be added to improve the display brightness of the display device. However, the newly added white sub-pixel also needs to be driven by a thin film transistor, which causes the problems of more complicated driving circuit and more power consumption of the display device. Therefore, a solution to the above problem is needed.

Disclosure of Invention

The invention provides a display device with good performance.

The invention provides a display device, which comprises a first display panel and a second display panel. The first display panel comprises a first shading pattern and a first pixel array layer. The first pixel array layer comprises a plurality of first scanning lines, a plurality of first data lines and a plurality of first sub-pixel structures. The plurality of first scanning lines and the plurality of first data lines are staggered to enclose a plurality of first display opening areas. The first light shielding pattern is positioned between the plurality of first display opening areas. Each of the first subpixel structures includes a first pixel electrode. The first display opening area is divided into a first driving pixel area where the first pixel electrode is located and a first blank pixel area where the first pixel electrode does not exist. The second display panel is superposed with the first display panel. The second display panel includes a second pixel array layer. The second pixel array layer has a plurality of second display opening areas, and one of the second display opening areas partially overlaps the first blank pixel area of one of the first display opening areas.

In view of the above, in the display device according to the embodiment of the invention, the first pixel array layer of the first display panel has a plurality of first display opening areas, and the first display opening areas are divided into the first driving pixel area where the first pixel electrode is located and the first blank pixel area where the first pixel electrode does not exist. Therefore, the display brightness of the display device can be improved, and the display quality of the display device is further improved.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1A is a schematic diagram of a display device according to an embodiment of the invention.

Fig. 1B to fig. 1C are schematic top views of a light shielding pattern and a pixel array layer of a display device according to an embodiment of the invention.

Fig. 2A is a schematic top view of a light shielding pattern and a pixel array layer of a display device according to another embodiment of the invention.

Fig. 2B is a schematic top view of a light shielding pattern and a pixel array layer of a display device according to another embodiment of the invention.

Fig. 2C is a schematic top view of a pixel array layer of a display device according to still another embodiment of the invention.

Fig. 3 is a schematic top view of a light shielding pattern and a pixel array layer of a display device according to another embodiment of the invention.

FIG. 4 is a schematic top view illustrating a light shielding pattern and a sub-pixel structure of a display device according to another embodiment of the invention.

FIG. 5 is a schematic top view illustrating a light-shielding pattern and a sub-pixel structure of a display device according to still another embodiment of the invention.

Fig. 6 is a schematic top view illustrating a light shielding pattern and a pixel array layer of a display device according to another embodiment of the invention.

Description of reference numerals:

10: display device

100: a first display panel

110: a first lower substrate

120: a first pixel array layer

121: a first scanning line

122: first data line

124. 124A, 124B, 124C, 124X, 124Y, 124Z: first sub-pixel structure

124 a: junction point

124 d: first drive pixel region

124 o: a first display opening area

124U, 224U: pixel structure

124w, 124wa, 124 wb: a first blank pixel region

124w 1: first sub-blank pixel region

124w 2: second sub-blank pixel region

124 wa': boundary of

124 wL: first length

1241: a first pixel electrode

1241 a: first boundary edge part

1241a ', 1241 b': boundary edge

1241 b: boundary edge part

1241L: second length

1242. 2242: active component

1243. 1243': a first common electrode

1243 o: opening of the container

130: a first display medium layer

140: a first upper substrate

150: a first polarizing plate

160: a first light shielding pattern

170: a first color filter pattern

200: second display panel

210: second lower substrate

220: second pixel array layer

221: scanning line

222: data line

224: second sub-pixel structure

224 d: second drive pixel region

224 o: second display opening area

2241: second pixel electrode

2243: second common electrode

230: a second display medium layer

240: second upper substrate

250: the second polarizing plate

260: second light-shielding pattern

270: second color filter pattern

x: a first direction

y: second direction

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc. have been exaggerated for clarity. Like reference numerals refer to like elements throughout the specification. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Further, "electrically connected" or "coupled" may mean that there are additional elements between the elements.

Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used herein to describe one element's relationship to another element, as illustrated. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" can include both an orientation of "lower" and "upper," depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "above" or "below" may include both an orientation of above and below.

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

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 (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.

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.

Fig. 1A is a schematic diagram of a display device according to an embodiment of the invention. Fig. 1B to fig. 1C are schematic top views of a light shielding pattern and a pixel array layer of a display device according to an embodiment of the invention. In particular, fig. 1B corresponds to the first light shielding pattern 160 and the first pixel array layer 120 of the first display panel 100 of fig. 1A, and fig. 1C corresponds to the first light shielding pattern 260 and the second pixel array layer 220 of the second display panel 200 of fig. 1A.

Referring to fig. 1A and 1B, a display device 10 of the present embodiment includes a first display panel 100 and a second display panel 200. In this embodiment, the display device 10 further includes a first polarizing plate 150 and a second polarizing plate 250, but the invention is not limited thereto. In the present embodiment, the first display panel 100 and the second display panel 200 are located between the first polarizing plate 150 and the second polarizing plate 250.

The first display panel 100 includes a first light blocking pattern 160 and a first pixel array layer 120. In the embodiment, the first display panel 100 further includes a first lower substrate 110, a first display medium layer 130 and a first upper substrate 140, but the invention is not limited thereto. The first display medium layer 130 is located between the first lower substrate 110 and the first upper substrate 140. The first display medium layer 130 is driven by the first pixel array layer 120. For example, in the embodiment, the first display medium layer 130 may be a liquid crystal layer having a plurality of liquid crystal molecules, but the invention is not limited thereto.

The first upper substrate 140 is disposed opposite to the first lower substrate 110. In the present embodiment, the first upper substrate 140 and the first lower substrate 110 are, for example, rigid substrates (rigid substrates). However, the invention is not limited thereto, and in other embodiments, the first upper substrate 140 and the first lower substrate 110 may also be flexible substrates (flexible substrates). For example, the hard substrate may be made of glass, quartz or other suitable materials; the flexible substrate may be made of plastic or other suitable materials.

The first pixel array layer 120 is disposed between the first lower substrate 110 and the first display medium layer 130, and the first light blocking pattern 160 is disposed between the first upper substrate 140 and the first display medium layer 130. In some embodiments, the first light blocking pattern 160 and the first pixel array layer 120 may be both located on the same side of the first display medium layer 130, for example, both located between the first lower substrate 110 and the first display medium layer 130. As shown in fig. 1B, the first pixel array layer 120 includes a plurality of first scan lines 121, a plurality of first data lines 122 and a plurality of first pixel structures 124, but the invention is not limited thereto. The first scan lines 121 and the first data lines 122 are disposed alternately. For example, in the present embodiment, the first scan line 121 extends in a first direction x, and the first data line 122 extends in a second direction y, where the first direction x may intersect the second direction y perpendicularly or in a non-perpendicular manner. Each of the first sub-pixel structures 124 is electrically connected to one of the corresponding first scan lines 121 and one of the corresponding first data lines 122. For the sake of conductivity, the first scan line 121 and the first data line 122 are generally made of metal material. However, the invention is not limited thereto, and according to other embodiments, other conductive materials (e.g., a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, or other suitable materials) or stacked layers of a metal material and other conductive materials may be used for the first scan line 121 and the first data line 122.

Each of the first subpixel structures 124 includes a first pixel electrode 1241. In the present embodiment, each of the first sub-pixel structures 124 further includes an active element 1242. For example, in the present embodiment, the active device 1242 includes at least one thin film transistor having a gate electrode, a semiconductor pattern, a drain electrode and a source electrode, wherein the gate electrode is electrically connected to the corresponding first scan line 121, the drain electrode is electrically connected to the corresponding first data line 122, and the drain electrode is electrically connected to the first pixel electrode 1241, but the invention is not limited thereto. The first sub-pixel structure 124 may further include a first common electrode 1243, and the first pixel electrode 1241 is disposed above the first common electrode 1243. As shown in the cross-sectional view of fig. 1A, the layer of the first pixel electrode 1241 is located between the layer of the first common electrode 1243 and the first display medium layer 130. The first pixel electrode 1241 has a plurality of slits exposing the first common electrode 1243, and the first display panel 100 can drive the first display medium layer 130 through an electric field between the first pixel electrode 1241 and the first common electrode 1243 to display a picture.

Each of the first sub-pixel structures 124 has a first display opening area 124 o. In the present embodiment, the first scan lines 121 and the first data lines 122 are disposed alternately to enclose the first display opening area 124 o. The first display opening area 124o may be further divided into a first driving pixel area 124d and a first blank pixel area 124 w. In the present embodiment, the first driving pixel region 124d has the first pixel electrode 1241, and the first blank pixel region 124w does not have the first pixel electrode 1241. That is, in the present embodiment, the first blank pixel region 124w may not be provided with the driving electrode. When the first display panel 100 displays a picture, light can penetrate through the first blank pixel area 124w without being blocked by the electrode layer, which is helpful for improving the display brightness of the display device 10, without designing a complicated driving circuit due to the addition of the first blank pixel area 124w, and without increasing the power consumption of the display device 10. For example, the first blank pixel area 124w of the present embodiment has neither the first pixel electrode 1241 nor the first common electrode 1243, so the first blank pixel area 124w is an area of the first display opening area 124o that is not affected by the driving signal, but the invention is not limited thereto.

In this embodiment, the first display panel 100 further includes a plurality of first color filter patterns 170. The first color filter patterns 170 are respectively located in the first driving pixel regions 124d but not in the first blank pixel regions 124 w. The first color filter pattern 170 includes a first red filter pattern, a first blue filter pattern, and a first green filter pattern. The adjacent three first sub-pixel structures 124 form a pixel structure 124U. The first red filter pattern, the first blue filter pattern and the first green filter pattern are respectively located in the first driving pixel regions 124d of the adjacent three first sub-pixel structures 124. In the present embodiment, the sum of the areas of the respective first display opening areas 124o of the three first sub-pixel structures 124 in the pixel structure 124U is a, the sum of the areas of the respective first blank pixel areas 124w of the three first sub-pixel structures 124 in the pixel structure 124U is B, and B is 20% to 30% of a. In the present embodiment, the areas of the respective first blank pixel regions 124w of the three first sub-pixel structures 124 in the pixel structure 124U may be different, but the invention is not limited thereto. Therefore, the proportion of the sub-pixel structures of each color in the pixel structure 124U can be adjusted as required to present different colors.

The first light shielding pattern 160 is disposed between the adjacent first pixel electrodes 1241. In the present embodiment, the first light shielding pattern 160 is disposed between the first display opening regions 124o of the adjacent first sub-pixel structures 124. In the present embodiment, the first light shielding pattern 160 is not disposed between the first driving pixel region 124d and the first blank pixel region 124w in the first display opening region 124 o. The first light blocking patterns 160 extend between two adjacent first display opening areas 124o, wherein the first light blocking patterns 160 are disposed between adjacent first driving pixel areas 124d and between adjacent first blank pixel areas 124 w. For example, in the present embodiment, the first light shielding pattern 160 covers the first scan line 121, the first data line 122 and the active device 1242. That is, the area of the first light shielding pattern 160 overlaps the areas of the first scan line 121, the first data line 122 and the active device 1242. In addition, the width of the first light-shielding pattern 160 may be slightly greater than the width of the first scan line 121 or the first data line 122. In the present embodiment, the material of the first light blocking pattern 160 may be a single layer or a multi-layer stacked metal material (e.g., at least one selected from the group consisting of copper, molybdenum, titanium, aluminum, tungsten, silver, gold, and alloys thereof), a resin material (e.g., polyimide, acrylate, or other suitable resin materials), graphite, or other suitable materials.

Referring to fig. 1A and fig. 1C, the second display panel 200 is stacked on the first display panel 100. The second display panel 200 includes a second pixel array layer 220. In this embodiment, the second display panel 200 further includes a second lower substrate 210, a second pixel array layer 220, a second display medium layer 230, a second light shielding pattern 260 and a second upper substrate 240, but the invention is not limited thereto.

The second upper substrate 240 is disposed opposite to the second lower substrate 210. In the present embodiment, the material of the second upper substrate 240 and the material of the second lower substrate 210 may be the same as or different from the material of the first upper substrate 140 or the material of the first lower substrate 110. In the present embodiment, the second display panel 200 is directly stacked with the first upper substrate 140 of the first display panel 100 through the second lower substrate 210, but the present invention is not limited thereto. In other embodiments, a polarizer, a diffuser, an anti-reflection film, a phase retarder, or other suitable components may be disposed between the second display panel 200 and the first display panel 100. Alternatively, in another embodiment, the first upper substrate 140 of the first display panel 100 and the second lower substrate 210 of the second display panel 200 may be the same substrate, so that the first display panel 100 and the second display panel 200 share the same substrate to reduce the overall thickness of the display device 10.

The second pixel array layer 220 is located between the second lower substrate 210 and the second display medium layer 230, and the second light blocking pattern 260 is located between the second upper substrate 240 and the second display medium layer 230. In some embodiments, the second light shielding pattern 260 and the second pixel array layer 220 may be both located on the same side of the second display medium layer 230, for example, both located between the second lower substrate 210 and the second display medium layer 230. As shown in fig. 1C, the second pixel array layer 220 includes a plurality of second sub-pixel structures 224 arranged in an array, and may further include a plurality of scan lines 221 and a plurality of data lines 222, but the invention is not limited thereto. In this embodiment, the second light-shielding patterns 260, the scan lines 221 and the data lines 222 may be configured in a manner similar to the configuration and technical content of the first light-shielding patterns 160, the first scan lines 121 and the first data lines 122 of the first display panel, and thus, the description thereof is not repeated.

Each of the second sub-pixel structures 224 includes a second pixel electrode 2241. In the present embodiment, each of the second sub-pixel structures 224 further includes an active element 2242. In the present embodiment, the technical content of the active element 2242 may be similar to that of the active element 1242, and the detailed description thereof is not repeated herein. The second sub-pixel structure 224 may further include a second common electrode 2243, and the second pixel electrode 2241 is disposed above the second common electrode 2243. As seen in the cross-sectional view of fig. 1A, the film layer of the second pixel electrode 2241 is located between the film layer of the second common electrode 2243 and the second display medium layer 230. The second pixel electrode 2241 has a plurality of slits exposing the second common electrode 2243, and the second display panel 200 may drive the second display medium layer 230 by an electric field between the second pixel electrode 2241 and the second common electrode 2243 to display a picture.

Each of the second sub-pixel structures 224 has a second display opening area 224 o. In the present embodiment, the scanning lines 221 and the data lines 222 are disposed alternately to enclose the second display opening area 224 o. One of the second display opening areas 224o of the second pixel array layer 220 partially overlaps the first blank pixel area 124w of one of the first display opening areas 124 o. In the present embodiment, the second pixel electrode 2241 is disposed in the entire second display opening area 224o, and the second display opening area 224o is not divided into blank pixel areas without the pixel electrode. That is, the second display opening area 224o is the second driving pixel area 224d as a whole. However, the present invention is not limited thereto. In other embodiments, the second sub-pixel structure 224 can also be selectively identical to the first sub-pixel structure 124, and the second display opening area 224o is divided into a second driving pixel area 224d having the second pixel electrode 2241 and a second blank pixel area without the second pixel electrode 2241.

In this embodiment, the second display panel 200 further includes a plurality of second color filter patterns 270, and the plurality of second color filter patterns 270 are respectively located in the plurality of second display opening regions 224o (i.e., the second driving pixel regions 224 d). The second color filter pattern 270 includes a red filter pattern, a blue filter pattern, and a green filter pattern. Specifically, in the present embodiment, a pixel structure 224U is formed by four adjacent second sub-pixel structures 224, wherein the red filter pattern, the blue filter pattern and the green filter pattern are respectively located in the second display opening areas 224o (i.e. the second driving pixel areas 224d) of three of the second sub-pixel structures 224 in the same pixel structure 224U, and the second display opening area 224o (i.e. the second driving pixel area 224d) of the remaining one of the second sub-pixel structures 224 in the same pixel structure 224U is not provided with the filter pattern. Therefore, the same pixel structure 224U may include a red sub-pixel structure provided with a red filter pattern, a blue sub-pixel structure provided with a blue filter pattern, a green sub-pixel structure provided with a green filter pattern, and a white sub-pixel structure not provided with a color filter pattern.

In other embodiments, the second pixel array layer 220 may adopt the same structural design as the first pixel array layer 120. That is, the first display panel 100 and the second display panel 200 may be two display panels having the same structural design. When the second pixel array layer 220 and the first pixel array layer 120 have the same structure design, the second display opening area 224o can be divided into a second driving pixel area 224d with the second pixel electrode 2241 and a second blank pixel area without the second pixel electrode 2241, and three adjacent second sub-pixel structures 224 form a pixel structure 224U. The sum of the areas of the respective second opening areas 224o of the three second sub-pixel structures 224 in the pixel structure 224U is C, the sum of the areas of the respective second blank pixel areas of the three second sub-pixel structures 224 in the pixel structure 224U is D, and D is 20% to 30% of C. In addition, the areas of the respective second blank pixel regions of the three second sub-pixel structures 224 in the pixel structure 224U may be different, but the invention is not limited thereto. Therefore, the proportion of the sub-pixel structures of each color in the pixel structure 224U can be adjusted according to requirements to present different colors.

The second display medium layer 230 is located between the second pixel array layer 220 and the second upper substrate 240. The second display medium layer 230 is driven by the plurality of second sub-pixel structures 224. In the present embodiment, the first display panel 100 and the second display panel 200 can be driven separately. Therefore, the first display panel 100 and the second display panel 200 can display different image information to show the effect of depth of field, so that human eyes can watch more real stereoscopic images. In this embodiment, the material of the second display medium layer 230 may be the same as or different from the material of the first display medium layer 130.

In view of the above, in the display device 10 according to the embodiment of the invention, the first pixel array layer 120 of the first display panel 100 has a plurality of first display opening areas 124o, and the first display opening areas 124o are divided into the first driving pixel area 124d where the first pixel electrode 1241 is located and the first blank pixel area 124w where the first pixel electrode 1241 does not exist. This can improve the display luminance of the display device 10, and thus improve the display quality of the display device 10.

Fig. 2A and 2B are schematic top views of a light shielding pattern and a pixel array layer of a display panel in a display device according to various embodiments of the invention. It should be noted that the light shielding patterns and the pixel array layers in fig. 2A and 2B can be regarded as different embodiments of the light shielding patterns and the pixel array layers in fig. 1B, and therefore the same or similar reference numerals are used to represent the same or similar elements in these figures, and the description of the same technical contents 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. The light-shielding pattern and the pixel array layer of fig. 2A or fig. 2B can also be used as another alternative embodiment of the light-shielding pattern and the pixel array layer of the second display panel of fig. 1C.

In fig. 2A, the first pixel array layer 120 has a plurality of first display opening areas 124o, and the first display opening areas 124o are divided into a first driving pixel area 124d where the first pixel electrode 1241 is located and a first blank pixel area 124w where the first pixel electrode 1241 does not exist. The main difference between the embodiment of fig. 2A and the embodiment of fig. 1B is that: the first blank pixel area 124w is divided into a first sub-blank pixel area 124w1 and a second sub-blank pixel area 124w 2. The first driving pixel region 124d of the first display opening region 124o is located between the first sub-blank pixel region 124w1 and the second sub-blank pixel region 124w 2. In the present embodiment, the first sub-blank pixel region 124w1, the first driving pixel region 124d and the second sub-blank pixel region 124w2 are arranged in the first direction x. However, the invention is not limited thereto, and in other embodiments, as shown in fig. 2B, the first sub-blank pixel area 124w1, the first driving pixel area 124d and the second sub-blank pixel area 124w2 may be arranged in the second direction y. Similar to the embodiment of fig. 1B, the design of the first driving pixel region 124d and the first blank pixel region 124w of the present embodiment is helpful to improve the display brightness of the display device, so as to improve the display quality of the display device.

Fig. 2C is a schematic top view illustrating a light shielding pattern and a pixel array layer of a display panel in a display device according to still another embodiment of the invention. It should be noted that the light shielding pattern and the pixel array layer in fig. 2C can be regarded as different embodiments of the light shielding pattern and the pixel array layer in fig. 2A, wherein the same or similar reference numerals are used to represent the same or similar elements, and the description of the same technical contents 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. The light-shielding pattern and the pixel array layer of fig. 2C may also be used as another alternative embodiment of the light-shielding pattern and the pixel array layer of the second display panel of fig. 1C.

The main difference between the embodiment of fig. 2C and the embodiment of fig. 2A is that: the respective first blank pixel regions 124w of the three first sub-pixel structures in the same pixel structure 124U have different configurations. Referring to fig. 2C, in the first pixel array layer 120 of the present embodiment, three adjacent

first sub-pixel structures

124A, 124B, and 124C form a pixel structure 124U. The first red filter pattern, the first blue filter pattern and the first green filter pattern are respectively located in the first driving pixel region 124d of each of the three adjacent

first sub-pixel structures

124A, 124B, 124C. In the present embodiment, each of the three

first sub-pixel structures

124A, 124B, 124C in the pixel structure 124U has a first blank pixel area 124w, wherein the respective first blank pixel areas 124w of the two first

sub-pixel structures

124B, 124C are divided into a first blank pixel area 124w1 and a second blank pixel area 124w 2.

In the present embodiment, the first blank pixel area 124w and the first driving pixel area 124d of the first sub-pixel structure 124A are arranged in the second direction y; the first sub-blank pixel region 124w1, the first driving pixel region 124d and the second sub-blank pixel region 124w2 of the first sub-pixel structure 124B are arranged in the first direction x; and the first sub-blank pixel area 124w1, the first driving pixel area 124d and the second sub-blank pixel area 124w2 of the first sub-pixel structure 124C are arranged in the second direction y. That is, in the present embodiment, the respective first blank pixel regions 124w of the three first sub-pixel structures in the same pixel structure 124U have different configurations. However, the present invention is not limited thereto. In other embodiments, the respective first blank pixel regions 124w of the three first sub-pixel structures in the same pixel structure 124U can be configured as required.

Fig. 3 is a schematic top view illustrating a light shielding pattern and a pixel array layer in a display panel of a display device according to another embodiment of the invention. It should be noted that the embodiment of the light shielding pattern and the pixel array layer in fig. 3 can be regarded as a different embodiment of the light shielding pattern and the pixel array layer in fig. 1B, wherein the same or similar reference numerals are used to represent the same or similar elements, and the description of the same technical contents 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. The light-shielding pattern and the pixel array layer of fig. 3 can also be used as another alternative embodiment of the light-shielding pattern and the pixel array layer of the second display panel of fig. 1C.

The main difference between the embodiment of fig. 3 and the embodiment of fig. 1B is that: the first light blocking patterns 160 are arranged differently. Referring to fig. 3, the first light-shielding pattern 160 extends between the respective first driving pixel regions 124d of two adjacent first display opening regions 124o, but is disconnected at the intersection 124a between the respective first blank pixel regions 124w of two adjacent first display opening regions 124 o. That is, the data lines 122 between the respective first blank pixel regions 124w of the adjacent two first display opening regions 124o are not shielded by the first light shielding patterns 160. Therefore, the aperture opening ratio of the display device can be improved.

FIG. 4 is a schematic top view illustrating a light shielding pattern and a sub-pixel structure in a display panel of a display device according to yet another embodiment of the invention. It should be noted that the light shielding pattern and the sub-pixel structure of fig. 4 can be regarded as another embodiment of the light shielding pattern and the sub-pixel structure of fig. 1B, wherein the same or similar reference numerals are used to represent the same or similar elements, and the description of the same technical contents 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. The light-shielding pattern and the sub-pixel structure of fig. 4 can also be used as another alternative embodiment of the light-shielding pattern and the sub-pixel structure of the second display panel of fig. 1C.

The main difference between the embodiment of fig. 4 and the embodiment of fig. 1B is that: the first pixel electrode 1241 is designed. Referring to fig. 4, the first pixel electrode 1241 included in one of the first sub-pixel structures 124 includes a first boundary edge portion 1241a located at a boundary between the first driving pixel area 124d and the first blank pixel area 124 wa. In this embodiment, the first boundary edge portion 1241a extends from the first driving pixel area 124d to overlap the first light shielding pattern 160 along the boundary between the first driving pixel area 124d and the first blank pixel area 124wa, that is, the first pixel electrode 1241 has a structure protruding (or having a wider width) relative to other portions at the boundary between the first driving pixel area 124d and the first blank pixel area 124 wa. Therefore, the first light-shielding pattern 160 can shield the display unevenness possibly occurring at the corner of the first pixel electrode 1241, thereby improving the light leakage problem possibly occurring in the first blank pixel area 124 wa.

The first pixel electrode 1241 further includes another boundary edge portion 1241b substantially parallel to the first boundary edge portion 1241 a. The boundary edge portion 1241b is located between the first driving pixel area 124d and the other first blank pixel area 124 wb. In other embodiments, the boundary edge portion 1241b may be similar to the first boundary edge portion 1241a, and extends from the first driving pixel area 124d to overlap the first light shielding pattern 160 along the boundary between the first driving pixel area 124d and the first blank pixel area 124 wb. Therefore, the situation that the first blank pixel area 124wb generates light leakage due to the electric field generated at the corner of the first pixel electrode 1241 can be improved.

In the present embodiment, the first blank pixel area 124wa can be regarded as an area between two adjacent data lines 122. A boundary 124 wa' of the first blank pixel area 124wa adjacent to the first boundary edge portion 1241a has a first length 124wL, which may be considered as a distance between two adjacent data lines 122. The first boundary edge portion 1241a and the boundary edge 1241 a' of the first blank pixel area 124wa have a second length 1241L, and the second length 1241L is greater than the first length 124 wL. Therefore, the situation that the first blank pixel area 124wa generates light leakage due to the electric field generated at the corner of the first pixel electrode 1241 can be improved.

FIG. 5 is a schematic top view illustrating a light shielding pattern and a sub-pixel structure of a display panel of a display device according to still another embodiment of the invention. It should be noted that the light shielding pattern and the sub-pixel structure of fig. 5 can be regarded as another embodiment of the light shielding pattern and the sub-pixel structure of fig. 1B, wherein the same or similar reference numerals are used to represent the same or similar elements in the two figures, and the description of the same technical contents 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. The light-shielding pattern and the sub-pixel structure of fig. 5 can also be used as another alternative embodiment of the light-shielding pattern and the sub-pixel structure of the second display panel of fig. 1C.

The main difference between the embodiment of fig. 5 and the embodiment of fig. 1B is that: one of the first subpixel structures 124 further includes a first common electrode 1243' having at least one opening. Referring to fig. 5, one of the first sub-pixel structures 124 includes a first common electrode 1243' having at least one opening 1243 o. In the embodiment, the position of the opening 1243o corresponds to a corner of the first pixel electrode 1241 and is located at the boundary between the first driving pixel area 124d and the first blank pixel area 124 w. Therefore, the situation that the first blank pixel area 124w generates light leakage due to the electric field generated at the corner of the first pixel electrode 1241 can be improved.

Fig. 6 is a schematic top view illustrating a light shielding pattern and a pixel array layer in a display panel of a display device according to another embodiment of the invention. It should be noted that fig. 6 can be regarded as another embodiment of the light shielding pattern and the pixel array layer of fig. 1B, wherein the same or similar reference numerals are used to represent the same or similar elements in the two figures, and the description of the same technical contents 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. The light-shielding pattern and the pixel array layer of fig. 6 can also be used as another alternative embodiment of the light-shielding pattern and the pixel array layer of the second display panel of fig. 1C.

The main difference between the embodiment of fig. 6 and the embodiment of fig. 1B is that: the respective boundary edges 1241' of the respective first pixel electrodes 1241 of two adjacent first sub-pixel structures 124 are not on the same straight line. Referring to fig. 6, the first sub-pixel structure 124X, the first sub-pixel structure 124Y and the first sub-pixel structure 124Z are used for illustration in the present embodiment. Each of the

first sub-pixel structures

124X, 124Y and 124 has a first boundary edge portion 1241a adjacent to the upper first blank pixel area 124wa and another boundary edge portion 1241b adjacent to the lower first blank pixel area 124wb of the first pixel electrode 1241.

A boundary edge 1241 a' of the first boundary edge portion 1241a of the first subpixel structure 124X overlaps the first light shielding pattern 160. A boundary edge 1241 a' of the first boundary edge portion 1241a of the first subpixel structure 124Y also overlaps the first light shielding pattern 160. However, the boundary edge 1241 a' of the first boundary edge portion 1241a of the first sub-pixel structure 124Z does not overlap the first light shielding pattern 160. Therefore, the respective first boundary edges 1241' of the respective first pixel electrodes 1241 of two adjacent first sub-pixel structures 124 may not be on the same straight line. In addition, the boundary edge 1241b ' of the other boundary edge portion 1241b of the first sub-pixel structure 124X, the boundary edge 1241b ' of the other boundary edge portion 1241b of the first sub-pixel structure 124Y, and the boundary edge 1241b ' of the other boundary edge portion 1241b of the first sub-pixel structure 124Z may not be on the same straight line. At this time, the first driving pixel regions 124d of the

first sub-pixel structures

124X, 124Y and 124Z and the color filter patterns corresponding to these sub-pixel structures may have different areas selectively.

In summary, the display device according to an embodiment of the invention includes a first display panel and a second display panel. The first display panel comprises a first shading pattern and a first pixel array layer. The first pixel array layer comprises a plurality of first scanning lines, a plurality of first data lines and a plurality of first sub-pixel structures. The plurality of first scanning lines and the plurality of first data lines are staggered to enclose a plurality of first display opening areas. The first light shielding pattern is positioned between the plurality of first display opening areas. Each of the first subpixel structures includes a first pixel electrode. The first display opening area is divided into a first driving pixel area where the first pixel electrode is located and a first blank pixel area where the first pixel electrode does not exist. The second display panel is superposed with the first display panel. The second display panel includes a second pixel array layer. The second pixel array layer has a plurality of second display opening areas. One of the second display opening areas partially overlaps the first blank pixel area of one of the first display opening areas. Therefore, the display brightness of the display device can be improved, and the display quality of the display device is further improved.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A display device, comprising:

a first display panel including a first light-shielding pattern and a first pixel array layer, the first pixel array layer including a plurality of first scan lines, a plurality of first data lines, and a plurality of first sub-pixel structures, the plurality of first scan lines and the plurality of first data lines being staggered to enclose a plurality of first display opening areas, the first light-shielding pattern being located between the plurality of first display opening areas, each of the plurality of first sub-pixel structures including a first pixel electrode, and the first display opening areas being divided into a first driving pixel area where the first pixel electrode is located and a first blank pixel area where the first pixel electrode does not exist; and

and a second display panel stacked on the first display panel, the second display panel including a second pixel array layer having a plurality of second display opening areas, one of the second display opening areas partially overlapping the first blank pixel area of one of the first display opening areas.

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

the display panel includes a first polarizing plate and a second polarizing plate, wherein the first display panel and the second display panel are located between the first polarizing plate and the second polarizing plate.

3. The display device according to claim 1, wherein the first light blocking pattern extends between the first driving pixel regions of two adjacent first display opening regions, but is disconnected at a boundary between the first driving pixel regions and the first dummy pixel regions of the two adjacent first display opening regions.

4. The display device of claim 1, wherein the first blank pixel area of one of the plurality of first display opening areas is divided into a first sub blank pixel area and a second sub blank pixel area, and the first driving pixel area of the first display opening area is located between the first sub blank pixel area and the second sub blank pixel area.

5. The display device according to claim 1, wherein the first pixel electrode of one of the plurality of first sub-pixel structures includes a first boundary edge portion at a boundary between the first driving pixel region and the first blank pixel region, and the first boundary edge portion extends from the first driving pixel region to an adjacent first data line along the boundary between the first driving pixel region and the first blank pixel region to overlap the first light-shielding pattern.

6. The display device according to claim 1, wherein the first pixel electrode of one of the plurality of first sub-pixel structures includes a first boundary edge portion located at a boundary between the first driving pixel region and the first blank pixel region, a boundary between the first blank pixel region and the first boundary edge portion has a first length, a boundary between the first boundary edge portion and the first blank pixel region has a second length, and the second length is greater than the first length.

7. The display device of claim 1, wherein one of the plurality of first pixel structures further comprises:

and the first common electrode is arranged above the first common electrode, and is provided with at least one opening, and the position of the opening corresponds to the corner of the first pixel electrode and is positioned at the junction of the first driving pixel area and the first blank pixel area.

8. The display device according to claim 1, wherein the first pixel electrode of each of the plurality of first sub-pixel structures has a boundary edge that borders a corresponding first blank pixel region, and boundary edges of the first pixel electrodes of two adjacent first sub-pixel structures are not on the same straight line.

9. The display device of claim 1, wherein the first display panel further comprises a first display medium layer and the second display panel further comprises a second display medium layer, wherein the first display medium layer is in the first display panel, the first display medium layer is driven by the plurality of first subpixel structures, the second display medium layer is in the second display panel, and the second display medium layer is driven by the plurality of second subpixel structures.

10. The display device according to claim 1, wherein adjacent three of the plurality of first sub-pixel structures constitute a pixel structure, the sum of areas of the first display opening areas of the three first sub-pixel structures in the pixel structure is a, the sum of areas of the first blank pixel areas of the three first sub-pixel structures in the pixel structure is B, and B is 20% to 30% of a.

11. The display device according to claim 1, wherein adjacent three of the plurality of first sub-pixel structures form a pixel structure, and the areas of the first blank pixel areas of the three first sub-pixel structures in the pixel structure are different.

12. The display device of claim 1, wherein the first display panel further comprises a plurality of first color filter patterns respectively located in the plurality of first driving pixel regions and not in the plurality of first blank pixel regions.

13. The display device of claim 12, wherein the plurality of first color filter patterns include a first red filter pattern, a first blue filter pattern and a first green filter pattern, and the first red filter pattern, the first blue filter pattern and the first green filter pattern are respectively located in three adjacent first driving pixel regions.

14. The display device according to claim 1, wherein the second pixel array layer comprises a plurality of second sub-pixel structures each including a second pixel electrode, wherein the second display opening area is divided into a second driving pixel area where the second pixel electrode is located and a second blank pixel area where the second pixel electrode is not present.

15. The display device according to claim 14, wherein adjacent three of the plurality of second sub-pixel structures constitute a pixel structure, a sum of areas of the second display opening areas of the three second sub-pixel structures in the pixel structure is C, a sum of areas of the second blank pixel areas of the three second sub-pixel structures in the pixel structure is D, and D is 20% to 30% of C.

16. The display device according to claim 15, wherein the areas of the second blank pixel regions of the three second sub-pixel structures in the pixel structure are different.

17. The display device of claim 14, wherein the second blank pixel area of one of the plurality of second display opening areas is divided into a third sub blank pixel area and a fourth sub blank pixel area, and the second driving pixel area of the second display opening area is located between the third sub blank pixel area and the fourth sub blank pixel area.

18. The display device of claim 14, wherein at least one of the plurality of second pixel structures further comprises:

and a second common electrode disposed above the common electrode, wherein the second common electrode has at least one opening located at a corner of the second pixel electrode and at a boundary between the second driving pixel region and the second dummy pixel region.

19. The display device of claim 14, wherein the second display panel further comprises a second light blocking pattern, wherein the second light blocking pattern extends between the second driving pixel regions of two adjacent second display opening regions but is broken at an interface between the second driving pixel regions and the second blank pixel regions of the two adjacent second display opening regions.

20. The display device according to claim 19, wherein the second pixel electrode of one of the plurality of second sub-pixel structures includes a second boundary edge portion located at a boundary between the second driving pixel region and the second dummy pixel region, and the second boundary edge portion extends from the second driving pixel region to overlap the second light-shielding pattern along the boundary between the second driving pixel region and the second dummy pixel region.