TWI748875B - 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 particularly relates to a bump structure and a liquid crystal display.

In recent years, with the progress of the semiconductor industry and related electronic industries, display screens, which play an important role in digital products, have also become the focus of designers' attention. Among them, liquid crystal displays (LCD) are also a mainstream display screen. Furthermore, the visual experience brought by the liquid crystal display to the viewer 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 the optical performance, thereby achieving a better display effect.

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 the size of the second bump. The second bump includes a plurality of first portions and a second portion connecting the adjacent first portions, and the first bumps and the first portions are arranged in a hexagonal densest manner.

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

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

Hereinafter, multiple embodiments of the present invention will be disclosed in the form of drawings. For clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is to say, in some embodiments of the present invention, these practical details are unnecessary. In addition, for the sake of simplification of the drawings, some conventional structures and elements will be omitted in the drawings or shown in a simple schematic manner.

Throughout the specification, the same reference numerals indicate the same or similar elements. In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or There may be other elements 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 between the element and the other element. As used herein, "connection" can refer to physical and/or electrical connection. Furthermore, the "electrical connection" or "coupling" between the two elements may mean that there are other elements between the 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 parts, these elements, components, regions, and/or Or part should not be restricted 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. Therefore, the “first element”, “component”, “region”, “layer” or “portion” discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings herein.

The terms used herein are only used to describe specific embodiments of the present invention, not to limit the present invention. For example, "a", "an" and "the" used herein do not limit the elements to be singular or plural. 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 related listed items. It should also be understood that when used in this specification, the term "includes" or "includes" designates the presence of the features, regions, wholes, steps, operations, elements, and/or components, but does not exclude one or more other features The existence or addition of, region, whole, step, operation, element, component and/or combination thereof.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" can be used herein to describe the relationship between one element and another element, as shown in the figure. 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 turned over, other elements that were originally described as being on the "lower" side of the element will become oriented on the "upper" side of the element. Therefore, depending on the specific orientation of the drawings, the exemplary term "lower" may include the orientations of "lower" and "upper". Similarly, if the device in one figure is turned over, other elements described as originally "below" or "below" the element will become oriented "above" the other element. Thus, the exemplary terms "below" or "below" can include an orientation of above and below.

As used herein, "about" or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the error associated with the measurement A certain number (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, the "about" or "substantially" used herein can select a more acceptable deviation range or standard deviation based on optical properties, etching properties, or other properties, and not one standard deviation can be used for all properties.

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

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

Please refer to FIGS. 1A to 1D. In this embodiment, the liquid crystal display 100 is, for example, a semi-transmissive liquid crystal display, that is, the light source can use 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 to this. In other unillustrated embodiments, the liquid crystal display is, for example, a reflective liquid crystal display (RLCD), that is, it only uses light from an ambient light source without a backlight module, so as to reduce manufacturing costs.

Furthermore, 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 to improve 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 with source/drain S/D in sequence. The electrode S/D extends upward to the transparent electrode layer 116 on the surface of the array substrate 110 and is electrically connected to the source/drain electrode S/D, but the invention is not limited to this. 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 optionally include any suitable film layers 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 bump 121 may be smaller than the size of the second bump 122, and the plurality of first bumps 121 and the plurality of first portions P1 are arranged in a hexagonal densest manner. Here, the horizontal direction is, for example, defined as the extension direction corresponding to the viewing angle of 0° and 180°, and the hexagonal most dense arrangement is, for example, defined as being centered on any first bump 121/first portion P1, and its surroundings are uniform. Surround the plurality of first bumps 121/the plurality of first portions P1 to form a hexagonal profile, in other words, the center first bump 121/first portion P1 and the adjacent two first bumps 121/first portion P1 The line between them can present 60°, as shown in Figure 1A.

Accordingly, in the present embodiment, two different sizes of bumps are designed in the hexagonal most densely arranged bump structure 120 (the reflectivity is higher than that of the bump structure of a single size bump design), and by comparison The design of the long axis of the large bump can sacrifice the light efficiency in the extending 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. The reflectivity of) improves the brightness corresponding to the viewing angle (viewer's viewing angle). In this way, 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 of this embodiment is smaller than the size 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 light efficiency in the extension direction of the camera can increase the light efficiency corresponding to the viewing angle of 90° and 270° (such as the viewing angle of the viewer watching the watch), so it can greatly improve the corresponding viewing angle of 90° and 270° (such as the viewer viewing the watch) The angle of view) reflectivity to increase the brightness corresponding to the viewing angle of 90° and 270° (such as the viewing angle of the watch when the viewer watches the watch). In this way, the liquid crystal display 100 including the aforementioned bump structure 120 can effectively improve its optical Performance, as shown in Figure 1C and Figure 1D, to achieve a better visual experience, but the present invention is not limited to this, in other embodiments, according to actual design requirements can have different extension directions (vertical extension or diagonal 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 of improving optical performance (such as setting light control film (LCF)), the design of the bump structure 120 of this embodiment can reduce the manufacturing cost while having corresponding Optical performance can achieve corresponding visual experience, but the present invention is not limited to this.

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

In some embodiments, the second bump 122 may have a different profile from the first bump 121. For example, as shown in FIG. The connected contour) is an oblong contour, but the present invention is not limited to this.

In some embodiments, the number of the first part P1 may be greater than or equal to two. The number of the first part 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 part P1 The quantity can be adjusted to other quantities according to actual design requirements. On the other hand, in this embodiment, since the number of the first part P1 is two, the number of the second part P2 connecting the adjacent first part P1 is one, that is, when the number of the first part 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, both 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. In other words, the first bumps 121 and the first bumps 121 are arranged alternately. The two bumps 122 and the first bumps 121 can be alternately arranged in order along the horizontal direction, but the present invention is not limited to this. 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 may also be arranged in multiple rows R1, where the multiple rows R1 may be arranged in a vertical direction, but the present invention is not limited to this. Here, the vertical direction is, for example, defined as the extension direction corresponding to the viewing angle angles of 90° and 270°.

In some embodiments, the first bump 121 and the second bump 122 may have a multilayer structure. For example, as shown in FIG. 1B, the first bump 121 may include a first reflective layer 121a and a first bump. The first reflective layer 121b on the 121a, and the second bump 122 may include a second bump 122a and a second reflective layer 122b on the second bump 122a, wherein the first bump 121a and the second bump 122a The material of the object 122a may include an organic material, and the material of the first reflective layer 121b and the second reflective layer 122b may include silver (Ag), an organic material, 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, and 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 It is smaller than the width of the top surface 122t of the second bump 122, but the present invention is not limited to this.

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

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

2 is a partial top view of a liquid crystal display according to another embodiment of the invention. 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 a vertical direction. Here, the vertical direction is, for example, defined as the extension direction corresponding to the viewing angle angles of 90° and 270°. Therefore, the size of the first bump 121 of this embodiment is smaller than the size 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 light efficiency in the direction increases the light efficiency corresponding to viewing angles of 0° and 180° (viewer's viewing angle), so it can greatly improve the reflectivity corresponding to viewing angles of 0° and 180° (viewer's viewing angle). The brightness of the corresponding viewing angles of 0° and 180° (viewer's viewing angle) is improved. 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 a horizontal direction, but the present invention is not limited to this. Here, the vertical direction is, for example, defined as the extending direction corresponding to the viewing angle angles of 0° and 180°.

3 is a partial top view of a liquid crystal display according to another embodiment of the invention. 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, for example, defined as the extending direction corresponding to the viewing angle angles of 135° and 315°. Therefore, the size of the first bump 121 of 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 difference between 135° and 315° can be sacrificed. The light efficiency in the extension direction can increase the light efficiency corresponding to the viewing angle of 45° and 225° (viewer's viewing angle), so it can greatly improve the reflectivity of the corresponding viewing angle of 45° and 225° (viewer's viewing angle) , The brightness corresponding to the viewing angle (viewer's viewing angle) is improved. 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 along another oblique direction, but the present invention is not limited to this. Here, the other oblique direction is, for example, defined as the extending direction corresponding to the viewing angle angles of 45° and 225°.

4 is a partial top view of a liquid crystal display according to another embodiment of the 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. Small size second bump 424. Furthermore, the small-sized second bump 424 is similar to the second bump 122, that is, the number of the first portions P4 in the small-sized second bump 424 is two. On the other hand, the number of the plurality of first portions P3 in the large-sized second bump 423 is the number of the plurality of first portions P4 in the small-sized second bump 424, that is, the number of the large-sized second bumps 423 The number of the first part P3 is greater than or equal to three. For example, in this embodiment, the number of the first part P3 in the large second bump 423 may be three, four, or five, but the present invention Not limited to this.

FIG. 5 is a partial top view of a liquid crystal display according to still another embodiment of the present invention. Please refer 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 at least surround 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 to further enhance the liquid crystal The reflection effect of the display 500. In addition, the plurality of peripheral bumps 523 are, for example, located in the aisle area of the liquid crystal display 500, but the present invention is not limited thereto.

It should be noted that although the long axis of the second bump in each of the above embodiments only includes one extension method, the embodiment of FIG. 1A is 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 in FIG. 3 is that the second bump has a long axis extending in an oblique direction, etc., but the present invention is not limited to this. In the same embodiment, both There are second bumps with long axes extending in different directions. In addition, the second bumps of different sizes in each of the above embodiments can be combined arbitrarily, and the arrangement between the second bumps and the first bumps can also depend on actual design requirements, as long as the hexagons are arranged in the densest manner. The block structure is designed in which the size of the first bump 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 belong to the protection scope of the present invention. .

In summary, the present invention designs two different size bumps in the hexagonal most densely arranged bump structure (the reflectivity is higher than that of the bump structure with a single size bump design), and by comparing The design of the long axis of the large bump can sacrifice the light efficiency in the extending 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. The reflectivity of) improves the brightness corresponding to the viewing angle (viewer's viewing angle). In this way, 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 in the above 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. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

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 One P2: Part Two 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 invention. Fig. 1B is a partial cross-sectional view taken along the line A-A' in Fig. 1A. FIG. 1C is a diagram showing the relationship between light incident angle, reflectivity and viewing angle of a conventional liquid crystal display. FIG. 1D is a diagram showing the relationship between light incident angle, reflectivity, and viewing angle of a 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 invention. FIG. 3 is a partial top view of a liquid crystal display according to another embodiment of the present invention. 4 is a partial top view of a liquid crystal display according to still another embodiment of the invention. FIG. 5 is a partial cross-sectional view of a liquid crystal display according to still another embodiment of the present invention. It should be noted that, in FIG. 1A, FIG. 2, FIG. 3, and FIG. 4, for clarity, only the bump structure is shown and other elements on the liquid crystal display are omitted.

100: LCD display

120: bump structure

121: first bump

122: second bump

P1: Part One

P2: Part Two

R1: row

Claims (9)

A liquid crystal display includes: an array substrate with a reflective area; and a bump structure, which is arranged on the reflective area, and includes: a plurality of first bumps; and at least one second bump with a horizontal direction and a vertical direction A long axis extending in a 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 second bump includes a plurality of first portions connected to adjacent ones In the second part of the plurality of first parts, the plurality of first bumps and the plurality of first parts are arranged in a hexagonal densest manner. The liquid crystal display according to claim 1, wherein when viewed from a plan view, the first bump and the plurality of first portions have the same outline. The liquid crystal display according to claim 2, wherein the outline includes a circular outline. The liquid crystal display according to claim 1, wherein the number of the plurality of first parts is greater than or equal to two. The liquid crystal display according to claim 1, wherein the first bumps are provided on both sides of the at least one second bump, so that the at least one second bump and the first bump are alternately arranged . The liquid crystal display according to claim 1, wherein the top surface of the first bump is a curved surface, and the top surface of the at least one second bump is a flat surface. The liquid crystal display according to claim 1, wherein the at least one second bump includes at least a large-size second bump and a small-size second bump. The liquid crystal display according to claim 7, wherein the number of the plurality of first portions in the small-sized second bump is two, and the plurality of first portions in the large-sized second bump The number of is greater than or equal to three. The liquid crystal display according to claim 1, wherein the bump structure further includes a plurality of peripheral bumps, at least surrounding the plurality of first bumps and the at least one second bump, and each of the peripheral bumps The height of the bump is greater than the height of the at least one second bump.

Images