TW202234131A - Bump structure and liquid crystal display - Google Patents

Abstract

A bump structure including a plurality of first bumps and at least one second bump is provided. The second bump has a long axis extending in a horizontal direction, a vertical direction, or an oblique direction, and the size of the first bump is smaller than the size of the second bump. The second bump includes a plurality of first portions and a second portion connecting the first portions adjacent to each other, and the first bumps and the first portions are arranged in a hexagonal close-packed structure. A liquid crystal display is also provided.

Description

Bump structure and liquid crystal display

The present invention relates to an electronic product, and more particularly, to a bump structure and a liquid crystal display.

In recent years, with the advancement of the semiconductor industry and related electronic industries, the display screen that plays an important role in digital products has also become the focus of designers. Liquid Crystal Display (LCD) is also a mainstream display screen. Furthermore, the visual experience brought to the viewer by a liquid crystal display is often closely related to its optical performance. Therefore, how to effectively improve the optical performance to achieve a better visual experience has become a challenge.

The present invention provides a bump structure and a liquid crystal display, which can effectively improve optical performance, thereby achieving better display effects.

A bump structure of the present invention includes a plurality of first bumps and at least one second bump. The second bump has a long axis extending in a horizontal direction, a vertical direction or an oblique direction, and the size of the first bump is smaller than that of the second bump. The second bump includes a plurality of first parts and a second part connecting the adjacent first parts, and the first bumps and the first parts are arranged in a hexagonal closest manner.

A liquid crystal display of the present invention includes an array substrate and the above-mentioned bump structure. The array substrate has a reflection area, and the bump structure is disposed on the reflection area.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Various embodiments of the present invention will be disclosed in the drawings below. For the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be taken to limit the invention. That is, in some embodiments of the invention, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and elements are omitted from the drawings or shown in a simple schematic manner.

Throughout the specification, the same reference numbers refer to the same or similar elements. In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. 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 Other elements may also be present between the element and the other element. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no other elements interposed therebetween. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, when two elements are "electrically connected" or "coupled" to each other, other elements may exist between the two elements.

It will be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, and/or or parts shall not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, "a first element," "component," "region," "layer" or "section" discussed below could be termed a second element, component, region, layer or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particular embodiments of the present invention only, and not for the purpose of limiting the present invention. For example, "a," "an," and "the" as used herein do not limit the singular or plural form of the elements. As used herein, "or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will also be understood that, when used in this specification, the terms "comprising" or "comprising" specify the stated feature, region, integer, step, operation, presence of an element and/or part, but not excluding one or more other features , region, whole, step, operation, element, part and/or the presence or addition of a combination thereof.

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 shown in the figures. It should be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one of the figures is turned over, other elements described as being on the "lower" side of the element would then be oriented on the "upper" side of the element. Thus, the exemplary term "lower" may include an orientation of "lower" and "upper" depending on the particular orientation of the figures. Similarly, if the device in one of the figures is turned over, other elements described as "below" or "beneath" elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "beneath" can encompass both an orientation of above and below.

As used herein, "about" or "substantially" includes the stated value and the average value within an acceptable deviation of the particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the error associated with the measurement. A specific amount (ie, the limit 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" or "substantially" may be used to select a more acceptable range of variation or standard deviation depending on optical properties, etching properties, or other properties, and not one standard deviation may apply to all properties.

Unless otherwise defined, 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 construed as having meanings consistent with their meanings in the context of the related art and the present invention, and are not to be construed as idealized or excessive Formal meaning, unless expressly defined as such herein.

FIG. 1A is a partial top view of a liquid crystal display according to an embodiment of the present invention. Fig. 1B is a partial cross-sectional view taken along line A-A' in Fig. 1A. FIG. 1C is a graph showing the relationship between light incident angle, reflectivity and viewing angle of a conventional liquid crystal display. 1D is a graph showing the relationship between the light incident angle, the reflectivity and the viewing angle of the liquid crystal display according to an embodiment of the present invention.

Referring to FIGS. 1A to 1D , in this embodiment, the liquid crystal display 100 is, for example, a transflective liquid crystal display, that is, the light source can pass the light of the ambient light source and the light of the backlight module at the same time, but the present invention is not limited thereto. In other not-shown embodiments, the liquid crystal display is, for example, a reflective liquid crystal display (RLCD), that is, only by the light of the ambient light source without a backlight module, so as to reduce the manufacturing cost.

Further, in this embodiment, the liquid crystal display 100 may include an array substrate 110 and a bump structure 120 , wherein the bump structure 120 may be disposed on the reflective area 102 on the array substrate 110 for enhancing the reflection of the liquid crystal display 100 Rate. In addition, as shown in FIG. 1B , the array substrate 110 may be a substrate 112 , a source/drain S/D, a dielectric layer 114 covering the source/drain S/D, and a penetrating dielectric layer 114 connected by the source/drain in sequence. The electrode S/D extends upward to the surface of the array substrate 110 and is electrically connected to the transparent electrode layer 116 of the source/drain electrode S/D, but the invention is not limited thereto. Here, the aforementioned film layers and components of the array substrate 110 can be made by any suitable materials and methods and can be configured in any suitable manner, and the array substrate 110 can also optionally include any suitable film layers that are not shown. .

In this embodiment, the bump structure 120 may include a plurality of first bumps 121 and at least one second bump 122 , wherein the second bump 122 has a long axis extending in the horizontal direction, and the second bump 122 may It includes a plurality of first parts P1 and a second part P2 connecting the adjacent first parts P1. In addition, the size of the first bumps 121 may be smaller than the size of the second bumps 122 , and the plurality of first bumps 121 and the plurality of first portions P1 are arranged in a hexagonal closest manner. Here, the horizontal direction is defined as, for example, the extending direction corresponding to the viewing angles of 0° and 180°, and the hexagonal closest arrangement is defined as, for example, taking any first bump 121/first portion P1 as the center, and the surrounding area is uniform Surrounding the plurality of first bumps 121/first portions P1 to form a hexagonal profile, in other words, the central first bump 121/first portion P1 and the adjacent two first bumps 121/first portion P1 The connecting line between them can present 60°, as shown in Figure 1A.

Accordingly, in the present embodiment, two bumps of different sizes are designed in the bump structure 120 arranged in the most densely hexagonal manner (the reflectivity is higher than that of the bump structure designed with a single size bump), and by comparing The design of the long axis of the large bump can sacrifice the light efficiency in the extension direction of the long axis to increase the light efficiency of the corresponding viewing angle (viewer's viewing angle), so the corresponding viewing angle (viewer's viewing angle) can be greatly improved. ) to increase the brightness corresponding to the viewing angle (viewing angle of the viewer), so that the liquid crystal display 100 including the aforementioned bump structure 120 can effectively improve its optical performance, thereby achieving a better visual experience.

For example, the size of the first bump 121 in this embodiment is smaller than that of the second bump 122 , and the larger second bump 122 has a long axis extending in the horizontal direction, so 0° and 180° can be sacrificed The luminous efficacy in the extension direction can increase the luminous efficacy of the corresponding viewing angles of 90° and 270° (such as the viewing angle of the viewer watching the watch). The reflectivity corresponding to the viewing angle of 90° and 270° (such as the viewing angle at which the watch is viewed by the viewer) is improved, so that the liquid crystal display 100 including the aforementioned bump structure 120 can effectively improve its optical properties. 1C and 1D to achieve better visual experience, but the present invention is not limited to this. In other embodiments, according to actual design requirements, there may be different extension directions (vertical extension or oblique extension). ) long-axis design to meet the visual experience of different corresponding viewing angles (viewer's viewing angle). On the other hand, compared with other means for improving optical performance (such as providing a light control film (LCF)), the design of the bump structure 120 of this embodiment can reduce the manufacturing cost and have corresponding Optical performance, and then achieve corresponding visual experience, but the present invention is not limited to this.

In some embodiments, the first bump 121 and the first part P1 have the same outline in a plan view. For example, as shown in FIG. 1A , the first bump 121 and the first part P1 may both have a circular outline. However, the present invention is not limited thereto, and in other embodiments not shown, the first bump and the first portion may both have a hexagonal profile or an octagonal profile.

In some embodiments, the second bump 122 may have a different profile than the first bump 121 . For example, as shown in FIG. 1A , the profile of the second bump 122 (the first portion P1 and the second portion P2 are different from each other) The connected contour) is an oblong contour, but the present invention is not limited thereto.

In some embodiments, the number of the first parts P1 may be greater than or equal to two. The number of the first parts P1 in this embodiment is schematically shown as two, but the present invention is not limited to this. In other embodiments, the number of the first parts P1 The quantity can be adjusted to other quantities according to the actual design requirements. On the other hand, in this embodiment, since the number of the first parts P1 is two, the number of the second parts P2 connecting the adjacent first parts P1 is one, that is, when the number of the first parts P1 is n, The number of the second part P2 is n-1, but the present invention is not limited to this.

In this embodiment, two sides of the second bump 122 may have first bumps 121 respectively, so that the second bumps 122 and the first bumps 121 are alternately arranged. The two bumps 122 and the first bumps 121 can be arranged alternately in the horizontal direction, but the invention is not limited thereto, and the arrangement of the first bumps 121 and the second bumps 122 can be adjusted according to actual design requirements.

In addition, as shown in FIG. 1A , the plurality of first bumps 121 and the second bumps 122 can also be arranged in multiple rows R1 , wherein the multiple rows R1 can be arranged in a vertical direction, but the invention is not limited thereto. Here, the vertical direction is defined as an extension direction corresponding to viewing angles of 90° and 270°, for example.

In some embodiments, the first bump 121 and the second bump 122 may be a multi-layer structure. For example, as shown in FIG. 1B , the first bump 121 may include a first reflective layer 121 a and a first protrusion The first reflective layer 121b on the 121a, and the second bumps 122 may include the second bumps 122a and the second reflective layer 122b on the second bumps 122a, wherein the first bumps 121a and the second bumps The material of the material 122a may include organic materials, and the materials of the first reflection layer 121b and the second reflection layer 122b may include silver (Ag), organic materials, but the present invention is not limited thereto.

In addition, as shown in FIG. 1B , the top surface 121t of the first bump 121 is a curved surface, while the top surface 122t of the second bump 122 is a flat surface. In other words, the width of the top surface 121t of the first bump 121 will be is smaller than the width of the top surface 122t of the second bump 122, but the present invention is not limited thereto.

In some embodiments, the array substrate 110 may further include the penetrating regions 104 between the reflective regions 102, so that the underlying light source (not shown) can pass through, but the invention is not limited thereto.

It must be noted here that the following embodiments use the element numbers and part of the content of the embodiments in FIGS. 1A to 1D , wherein the same or similar numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted part, reference may be made to the foregoing embodiments, and repeated descriptions in the following embodiments will not be repeated.

2 is a partial top view of a liquid crystal display according to another embodiment of the present invention. Referring to FIG. 2 , the difference between the liquid crystal display 200 of this embodiment and the liquid crystal display 100 of the embodiment of FIG. 1A is that the second bump 222 of the bump structure 220 of this embodiment has a long axis extending in the vertical direction. Here, the vertical direction is defined as an extension direction corresponding to viewing angles of 90° and 270°, for example. Therefore, the size of the first bump 121 in this embodiment is smaller than that of the second bump 222 , and the larger second bump 222 has a long axis extending in the vertical direction, so the extension of 90° and 270° can be sacrificed The luminous efficacy in the direction increases the luminous efficacy corresponding to viewing angles of 0° and 180° (viewer’s viewing angle), so the reflectivity corresponding to viewing angles of 0° and 180° (viewer’s viewing angle) can be greatly improved, The brightness corresponding to the viewing angle of 0° and 180° (viewer's viewing angle) is increased. In this way, the liquid crystal display 200 including the aforementioned bump structure 220 can effectively improve its optical performance, thereby achieving a better visual experience, but The present invention is not limited to this.

In addition, in this embodiment, the plurality of first bumps 121 and the second bumps 222 may also be arranged in multiple rows R2, wherein the multiple rows R2 may be arranged in the horizontal direction, but the present invention is not limited thereto. Here, the vertical direction is defined as an extension direction corresponding to viewing angles of 0° and 180°, for example.

3 is a partial top view of a liquid crystal display according to another embodiment of the present invention. Referring to FIG. 3 , the difference between the liquid crystal display 300 of this embodiment and the liquid crystal display 100 of the embodiment of FIG. 1A is that the second bump 322 of the bump structure 320 of this embodiment has a long axis extending in an oblique direction. Here, the oblique direction is defined as an extension direction corresponding to viewing angles of 135° and 315°, for example. Therefore, the size of the first bump 121 in this embodiment is smaller than the size of the second bump 322 , and the larger second bump 322 has a long axis extending in an oblique direction, so the 135° and 315° can be sacrificed. The luminous efficacy in the extension direction increases the luminous efficacy corresponding to viewing angles of 45° and 225° (viewer's viewing angle), so the reflectivity corresponding to viewing angles of 45° and 225° (viewer's viewing angle) can be greatly improved , to improve the brightness of the corresponding viewing angle (viewer's viewing angle), in this way, the liquid crystal display 300 including the aforementioned bump structure 320 can effectively improve its optical performance, thereby achieving a better visual experience, but the present invention is not limited to this.

In addition, in this embodiment, the plurality of first bumps 121 and the second bumps 322 may also be arranged in multiple rows R3, wherein the multiple rows R3 may be arranged in another oblique direction, but the invention is not limited thereto. Here, another oblique direction is defined as an extension direction corresponding to viewing angles of 45° and 225°, for example.

4 is a partial top view of a liquid crystal display according to yet another embodiment of the present invention. Referring to FIG. 4 , the difference between the liquid crystal display 400 of this embodiment and the liquid crystal display 100 of the embodiment of FIG. 1A is that: at least one second bump of the bump structure 420 of this embodiment at least includes a large-sized second bump 423 and Small size second bumps 424 . Further, the small-sized second bumps 424 are similar to the second bumps 122 , that is, the number of the plurality of first portions P4 in the small-sized second bumps 424 is two. On the other hand, the number of the plurality of first portions P3 in the large-sized second bumps 423 is smaller than the number of the plurality of first portions P4 in the large-sized second bumps 424 , that is, the plurality of the large-sized second bumps 423 The number of the first parts P3 is greater than or equal to three. For example, in this embodiment, the number of the multiple first parts P3 in the large-sized second bumps 423 may be three, four or five, but the present invention Not limited to this.

5 is a partial top view of a liquid crystal display according to still another embodiment of the present invention. Referring to FIG. 5 , the difference between the liquid crystal display 500 of this embodiment and the liquid crystal display 100 of the embodiment of FIG. 1A is that the bump structure 520 of this embodiment further includes a plurality of peripheral bumps 523 . The plurality of peripheral bumps 523 surround at least the plurality of first bumps 121 and the at least one second bump 122, and the height 523H of each peripheral bump 523 is greater than the height 122H of the at least one second bump 122, so as to further enhance the liquid crystal Reflection effect of display 500. In addition, the plurality of peripheral bumps 523 are, for example, located in the passage area of the liquid crystal display 500, but the invention is not limited thereto.

It should be noted that although the long axis of the second bump in each of the above-mentioned embodiments only includes one way of extension, the embodiment of FIG. 1A shows that the second bump has a long axis extending in the horizontal direction, and the embodiment of FIG. 2 The second bump has a long axis extending in the vertical direction, and the embodiment of FIG. 3 shows that the second bump has a long axis extending in the oblique direction, etc., but the present invention is not limited to this, in the same embodiment, it can be simultaneously There are second bumps with long axes extending in different directions. In addition, the second bumps of different sizes in the above embodiments can be combined arbitrarily, and the arrangement between the second bumps and the first bumps can also be determined according to the actual design requirements, as long as the bumps arranged in the hexagonal closest manner The size of the first bump designed in the block structure is smaller than the size of the at least one second bump, and the at least one second bump has a long axis extending in the horizontal direction, the vertical direction or the oblique direction, all belonging to the protection scope of the present invention .

To sum up, the present invention designs bumps of two different sizes in the bump structure arranged in the most densely hexagonal manner (the reflectivity is higher than that of the bump structure designed with bumps of a single size), and by comparing The design of the long axis of the large bump can sacrifice the light efficiency in the extension direction of the long axis to increase the light efficiency of the corresponding viewing angle (viewer's viewing angle), so the corresponding viewing angle (viewer's viewing angle) can be greatly improved. ) to improve the brightness corresponding to the viewing angle (viewer's viewing angle), so that the liquid crystal display including the aforementioned bump structure can effectively improve its optical performance, thereby achieving a better visual experience.

Although the present invention has been disclosed above by the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the 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 determined by the scope of the appended patent application.

100, 200, 300, 400, 500: LCD display 102: Reflection area 104: Penetration Zone 110: Array substrate 112: Substrate 114: Dielectric layer 116: transparent electrode layer 120, 220, 320, 420, 520: bump structure 121: First bump 121a: first protrusion 121b: first reflective layer 121t, 122t: top surface 122, 222, 322: Second bump 122a: Second protrusion 122b: second reflective layer 423: Large size second bump 424: Small size second bump 523: Peripheral bump S/D: source/drain P1, P3, P4: Part 1 P2: Part II R1, R2, R3: row 523H, 122H: Height

FIG. 1A is a partial top view of a liquid crystal display according to an embodiment of the present invention. Fig. 1B is a partial cross-sectional view taken along line A-A' in Fig. 1A. FIG. 1C is a graph showing the relationship between light incident angle, reflectivity and viewing angle of a conventional liquid crystal display. 1D is a graph showing the relationship between the light incident angle, the reflectivity and the viewing angle of the liquid crystal display according to an embodiment of the present invention. 2 is a partial top view of a liquid crystal display according to another embodiment of the present invention. 3 is a partial top view of a liquid crystal display according to yet another embodiment of the present invention. 4 is a partial top view of a liquid crystal display according to still another embodiment of the present invention. 5 is a partial cross-sectional view of a liquid crystal display according to yet another embodiment of the present invention. It should be noted that, for the sake of clarity, only the bump structure is shown in FIGS. 1A , 2 , 3 , and 4 , and other elements on the liquid crystal display are omitted.

100: LCD display

120: bump structure

121: First bump

122: Second bump

P1: Part 1

P2: Part II

R1: row

Claims (10)

A bump structure, comprising: a plurality of first bumps; and At least one second bump has a long axis extending in a horizontal direction, a vertical direction or an oblique direction, and the size of the first bump is smaller than the size of the at least one second bump, wherein the at least one first bump The two bumps include a plurality of first parts and a second part connecting the adjacent first parts, and the first bumps and the first parts are arranged in a hexagonal closest manner. The bump structure of claim 1, wherein in a plan view, the first bump and the plurality of first portions have the same outline. The bump structure of claim 2, wherein the profile comprises a circular profile. The bump structure of claim 1, wherein the number of the plurality of first parts is greater than or equal to two. The bump structure of claim 1, wherein the at least one second bump has the first bump on both sides of the at least one second bump, so that the at least one second bump alternates with the first bump arrangement. The bump structure of claim 1, wherein a top surface of the first bump is an arc surface, and a top surface of the at least one second bump is a flat surface. The bump structure of claim 1, wherein the at least one second bump includes at least a large-sized second bump and a small-sized second bump. The bump structure of claim 7, wherein the number of the plurality of first portions in the small-sized second bumps is two, and the plurality of first portions in the large-sized second bumps The number of a part is greater than or equal to three. The bump structure of claim 1, further comprising a plurality of peripheral bumps surrounding at least the plurality of first bumps and the at least one second bump, and the height of each of the peripheral bumps is greater than the height of the at least one second bump. A liquid crystal display, comprising: an array substrate with a reflective area; The bump structure according to any one of claim 1 to claim 9 is disposed on the reflection area.

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