CN114038316A - Display with optical adhesive layer - Google Patents

Abstract

The invention discloses a display with an optical adhesive layer, which comprises a first substrate with positioning marks, the optical adhesive layer which is positioned on the first substrate and is provided with opening marks, and a second substrate which is positioned on the optical adhesive layer, wherein the vertical projection of the positioning marks on the first substrate falls into the vertical projection of the opening marks on the first substrate, and any two points of the positioning marks are equal to the shortest distance of the opening marks.

Description

Display with optical adhesive layer

Technical Field

The present invention relates to displays, and more particularly to displays having optical glues.

Background

The display has multiple layers of elements and is assembled into a device by a suitable adhesive layer to provide complete imaging or additional functionality. For example, a full-attachment (direct bonding) display completely bonds a display panel and a cover layer thereon through an optical adhesive, so that a gap between the display panel and the cover layer is reduced, thereby increasing durability and definition of the display. As the design and demand of displays are gradually diversified, how to provide precise optical cement bonding in different displays to increase the yield of the device is an important development project in the field of display devices.

Disclosure of Invention

According to an embodiment of the present invention, a display is provided, which includes a first substrate, an optical adhesive layer on the first substrate, and a second substrate on the optical adhesive layer, wherein the first substrate includes a first positioning mark, the optical adhesive layer includes a first opening mark, a vertical projection of the first positioning mark on the first substrate falls within a vertical projection of the first opening mark on the first substrate, and a shortest distance between any two points of the first positioning mark and the first opening mark is equal.

In some embodiments of the present invention, the shortest distance between the first positioning mark and the first opening mark is between 0.3mm and 5 mm.

In some embodiments of the present invention, the first positioning mark and the first opening mark have the same shape.

In some embodiments of the present invention, the first opening mark is in the shape of a straight line, including an L-shape, a cross-shape, or a rectangle.

In some embodiments of the invention, the first opening indicia is a perfect circle.

In some embodiments of the present invention, the first alignment mark is formed on the first substrate by ink printing.

In some embodiments of the present invention, the optical adhesive layer has a profiled edge.

In some embodiments of the present invention, the first opening mark is connected to an edge of the optical adhesive layer.

In some embodiments of the present invention, the first opening mark is separated from an edge of the optical glue layer.

In some embodiments of the present invention, the first substrate includes a display area, and a vertical projection of the first opening mark on the first substrate falls outside the display area.

In some embodiments of the present invention, the first substrate includes a pixel region, and a perpendicular projection of the first opening mark on the first substrate falls outside the pixel region.

In some embodiments of the present invention, the first substrate includes a second positioning mark, the optical adhesive layer includes a second opening mark, a vertical projection of the second positioning mark on the first substrate falls within a vertical projection of the second opening mark on the first substrate, and a shape of the second positioning mark is different from that of the first positioning mark.

In some embodiments of the present invention, the optical adhesive layer includes a second opening mark, the second substrate includes a second positioning mark, a vertical projection of the second positioning mark on the second substrate falls within a vertical projection of the second opening mark on the second substrate, and a shortest distance between any two points of the second positioning mark and the second opening mark is equal.

Drawings

Aspects of the invention are best understood from the following detailed description when read with the accompanying drawing figures. It should be noted that the various features are not drawn to scale according to standard methods in the industry. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.

FIG. 1 is a top view of a display according to some embodiments of the present invention;

FIG. 2 is a perspective view of the display of FIG. 1;

FIG. 3 is a cross-sectional view of the display of FIG. 1 along section line A-A';

FIG. 4A is an enlarged top view of the alignment marks and opening marks of the display of FIG. 1;

FIGS. 4B-4D are enlarged top views of positioning marks and opening marks according to some other embodiments of the present invention;

FIG. 5A is a top view of a display according to some embodiments of the present invention;

FIGS. 5B-5C are cross-sectional views of displays according to some embodiments of the present invention;

FIGS. 6A-6E are cross-sectional views of various stages of an optical glue layer formation process according to some embodiments of the present invention;

fig. 7A-7D are cross-sectional views of various stages of a display bonding process according to some embodiments of the invention.

Description of the symbols

10,20,30,40 display

100 first substrate

100' second substrate

102 pixel region

104 display area

110 optical adhesive layer

120, 120', 122,124,126 positioning mark

130, 130', 132,134,136 opening marks

140 marking

200,202 heavy release film

210 optical adhesive layer

220 opening mark

230 light release film

240 base plate

250 positioning mark

1000 optical rubber cutter die

1010 heavy release type film cutting die

1020 light release type film cutting die

1030 download station

1035 Screen plate

1040, uploading table

1050 roller

Line of A-A

W1, W2 distance

Detailed Description

To achieve the various features of the subject matter referred to, the following disclosure provides many different embodiments, or examples. Specific examples of components, values, configurations, etc. are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to be limiting. For example, 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 physically and/or electrically connected. Furthermore, an "electrical connection" or "coupling" may exist between two elements.

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

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.

The present disclosure provides a display including a substrate including positioning marks and an optical adhesive layer including opening marks. Because the vertical projection of the positioning mark on the substrate falls in the vertical projection of the opening mark on the substrate, and the shortest distance between any two points of the positioning mark and the opening mark is equal, the substrate and the optical adhesive layer have accurate corresponding positions. Therefore, the positioning mark and the opening mark can reduce the position error of the optical adhesive layer attached on the substrate, thereby increasing the reliability of the display.

Referring to fig. 1 to 3, fig. 1 is a top view of a display 10 according to some embodiments of the present invention, fig. 2 is a disassembled perspective view of the display 10 in fig. 1, and fig. 3 is a cross-sectional view of the display 10 in fig. 1 along a sectional line a-a'. The display 10 includes a first substrate 100, an optical adhesive layer 110 on the first substrate 100, and a second substrate 100' on the optical adhesive layer 110, wherein the first substrate 100 includes a positioning mark 120 on a surface of the first substrate 100, and the optical adhesive layer 110 includes an opening mark 130 passing through the optical adhesive layer 110. It should be understood that some elements of the display 10 are not shown in fig. 1-3 to simplify the drawings, and that the display 10 in other embodiments may include additional elements.

As shown in fig. 1 to 3, the positioning mark 120 and the opening mark 130 larger than the positioning mark 120 have suitable corresponding positions, so that the first substrate 100 and the optical adhesive layer 110 can be precisely attached. Specifically, the perpendicular projection of the positioning mark 120 on the first substrate 100 falls within the perpendicular projection of the opening mark 130 on the first substrate 100, and the shortest distance W1 between any two points of the positioning mark 120 and the opening mark 130 is equal. Since the opening mark 130 of the optical adhesive layer 110 and the positioning mark 120 of the first substrate 100 have a function of corresponding positions to each other, the optical adhesive layer 110 can be precisely formed on the first substrate 100 through the opening mark 130 and the positioning mark 120, thereby increasing the device reliability of the display 10.

In some embodiments, the first substrate 100 and the second substrate 100' may have a suitable material to serve as a stacked component in the display 10. For example, in some embodiments, the first substrate 100 may be a hard substrate (e.g., a glass substrate, a ceramic substrate or a wafer) or a flexible substrate (e.g., polyethylene terephthalate (PET) or polymethyl methacrylate (PMMA)), and the second substrate 100 'may be a protective layer (e.g., a plastic cover plate including Colorless Polyimide (CPI)), so that the display element may be formed on the first substrate 100 and isolated from the outside by the second substrate 100'. In other embodiments, the first substrate 100 may be a substrate having a display element, and the second substrate 100 'may be a touch layer having a touch electrode, so that the first substrate 100 and the second substrate 100' may together form a touch screen.

In some embodiments, the first substrate 100 may include the pixel region 102, and the positioning mark 120 on the first substrate 100 is located outside the pixel region 102. For example, the first substrate 100 may be a display panel (e.g., a Liquid Crystal Display (LCD) panel, a light-emitting diode (led) panel, etc.) having a pixel region 102, where the pixel region 102 includes a plurality of pixel units for providing an imaging function of the display 10. If the alignment mark 120 is formed in the pixel region 102, the flatness of the alignment mark 120 formed on the first substrate 100 may be affected by a plurality of pixel units of the pixel region 102. On the other hand, the positioning mark 120 may affect the imaging effect of the pixel region 102. Therefore, forming the alignment mark 120 outside the pixel region 102 can avoid the pixel region 102 and the alignment mark 120 from adversely affecting each other.

In some embodiments, the second substrate 100 'may include the display region 104, and the positioning mark 120 on the second substrate 100' is located outside the display region 104. For example, the second substrate 100' may have a light-transmissive display region 104 and a light-opaque peripheral region, such that the display region 104 provides an imaging range of the display 10. Since the positioning mark 120 is located outside the display area 104, the positioning mark 120 can be prevented from affecting the imaging function of the display 10. It is noted that the display region 104 of the second substrate 100' may be a shaped (free form) display region. As used herein, "shaped" is used to refer to a shape in which at least a portion of the edge is non-linear, such as the shape of the display area 104 shown in FIG. 1 having a combination of straight and curved lines. Since the display region 104 of the second substrate 100 'may be shaped, the type of the second substrate 100' applicable to the display 10 is increased, thereby increasing the design possibility of the display 10.

In some embodiments, the optical adhesive layer 110 may have a suitable material, such that the first substrate 100 can be adhered to the second substrate 100' through the optical adhesive layer 110. Specifically, the optical adhesive layer 110 has a high light transmittance and a low refractive index difference with the first substrate 100 and the second substrate 100', which reduces the influence of the optical adhesive layer 110 on the imaging effect of the display 10, for example, the optical adhesive layer 110 may include acrylic resin, epoxy resin, and the like. In addition, the optical adhesive layer 110 has good extensibility and adhesiveness, so as to be smoothly attached to the first and second substrates 100 and 100'.

In some embodiments, as shown in fig. 1, the shape of the optical adhesive layer 110 may be different from the shape of the first substrate 100, the second substrate 100', the pixel region 102, or the display region 104, so as to increase the application range of the optical adhesive layer 110. As described above, the corresponding positions of the opening marks 130 and the positioning marks 120 are used for the optical adhesive layer 110 and the first substrate 100, but not the shapes of the optical adhesive layer 110 and the first substrate 100, the second substrate 100', the pixel region 102 or the display region 104 themselves are used as the corresponding standards. Therefore, the above-mentioned elements or regions may have different shapes, thereby increasing the diversity of combinations of the optical adhesive layer 110 and the first and second substrates 100 and 100'. It is noted that the optical adhesive layer 110 may have a shaped edge, so that the optical adhesive layer 110 may be applied to the first substrate 100 having various shapes or the second substrate 100' having various shapes of the display area 104, thereby increasing the design possibility of the display 10.

In some embodiments, the area of the optical adhesive layer 110 may be larger than the pixel region 102 of the first substrate 100 and the display region 104 of the second substrate 100', so as to prevent the positioning mark 120 of the first substrate 100 and the opening mark 130 of the optical adhesive layer 110 from affecting the imaging effect of the display 10 or the flatness of the optical adhesive layer 110. Specifically, the area of the optical adhesive layer 110 is larger than the area of the pixel region 102 and the display region 104, so that the opening mark 130 can be located on the optical adhesive layer 110 outside the pixel region 102 and the display region 104, and the position of the opening mark 130 corresponds to the positioning mark 120. Therefore, the vertical projections of the opening marks 130 and the positioning marks 120 on the first substrate 100 can fall outside the pixel region 102 and the display region 104, so as to avoid uneven imaging of the display 10 caused by exposing the opening marks 130 of the first substrate 100, and to increase the flatness of the optical adhesive layer 110 attached to the first substrate 100 and the second substrate 100'.

In some embodiments, the opening mark 130 of the optical adhesive layer 110 and the positioning mark 120 of the first substrate 100 may have a suitable shortest distance W1 therebetween, thereby achieving an accurate corresponding position between the optical adhesive layer 110 and the first substrate 100. Specifically, as shown in fig. 3, the positioning mark 120 and the opening mark 130 may have the shortest distance W1 therebetween such that the positioning mark 120 and the opening mark 130 are separated from each other. For example, the shortest distance W1 between the positioning mark 120 and the opening mark 130 may be between 0.3mm and 5mm, and preferably between 0.3mm and 0.5 mm. If the shortest distance W1 between the positioning mark 120 and the opening mark 130 is less than 0.3mm, a tolerance (tolerance) reserved in the manufacturing process is absent between the positioning mark 120 and the opening mark 130, so that it is difficult to control the position where the optical adhesive layer 110 is attached to the first substrate 100 in the manufacturing process; if the shortest distance W1 between the positioning mark 120 and the opening mark 130 is greater than 5mm, the positional correspondence accuracy of the optical adhesive layer 110 and the first substrate 100 is reduced, thereby degrading the reliability of the display 10.

In some embodiments, the shortest distance between any two points of the positioning mark 120 and the opening mark 130 may be in different directions to increase the position correspondence accuracy between the optical adhesive layer 110 and the first substrate 100. FIG. 4A illustrates an enlarged top view of the positioning mark 120 and the opening mark 130 of the display 10 of FIG. 1 according to some embodiments of the invention. Referring to fig. 3 and 4A, the positioning mark 120 and the opening mark 130 may have a first shortest distance W1 in a first direction D1, and the positioning mark 120 and the opening mark 130 may have a second shortest distance W2 in a second direction D2 different from the first direction D1, wherein the first shortest distance W1 and the second shortest distance W2 are equal. Since the shortest distances of the positioning mark 120 and the opening mark 130 in different directions are equal, the optical adhesive layer 110 and the first substrate 100 have precise corresponding positions in different directions, thereby increasing the reliability of the display 10.

In some embodiments, the positioning mark 120 and the opening mark 130 may have suitable shapes, so that the distance between the positioning mark 120 and the opening mark 130 is easily measured, thereby determining and controlling the precise position where the optical adhesive layer 110 is attached to the first substrate 100. For example, the positioning mark 120 and the opening mark 130 may have a shape of an arc, a straight line, or a right angle. Referring to fig. 4A-4D, fig. 4B-4D illustrate enlarged top views of the positioning marks 122,124, and 126 and the opening marks 132,134, and 136 according to some embodiments of the present invention, the enlarged areas being similar to those of fig. 4A. As shown in fig. 4A, the positioning mark 120 and the opening mark 130 may be perfect circles. As shown in fig. 4B, the positioning mark 122 and the opening mark 132 may be rectangular. As shown in fig. 4C, the positioning mark 124 and the opening mark 134 may be cross-shaped. As shown in fig. 4D, the positioning mark 126 and the opening mark 136 may be L-shaped. It should be understood that the above-described embodiments are merely examples of the positioning mark 120 and the opening mark 130, and that positioning marks 120 and opening marks 130 having other suitable shapes are also within the scope of the present invention.

In some embodiments, the opening mark 130 may be separated from the edge of the optical adhesive layer 110, so that the positioning mark 120 may be located entirely within the area of the optical adhesive layer 110. As shown in fig. 4A, the opening mark 130 is entirely located in the optical adhesive layer 110 and separated from the edge of the optical adhesive layer 110. Since the positioning mark 120 falls within the opening mark 130, the positioning mark 120 is also located within the area of the optical adhesive layer 110. In some embodiments, the opening mark 130 may be connected to an edge of the optical adhesive layer 110 such that the positioning mark 120 may be partially surrounded by the optical adhesive layer 110. As shown in fig. 4D, both ends of the opening mark 130 are respectively connected to the edges of the optical adhesive layer 110 such that the optical adhesive layer 110 partially surrounds the positioning mark 120.

In some embodiments, the positioning indicia 120 and the opening indicia 130 may have a variety of designs in cooperation with the display 10. Specifically, the positioning mark 120 may be formed on the first substrate 100 by ink printing such that the positioning mark 120 has various shapes, sizes, or positions. For example, in the embodiment shown in fig. 1, a plurality of positioning marks 120 may be symmetrically formed on the first substrate 100, and the positioning marks 120 at different positions may have the same shape. On the other hand, the design of the positioning mark 120 can be matched to form the opening mark 130 penetrating through the optical adhesive layer 110 by a cutter, so that the opening mark 130 has a shape, size or position corresponding to the positioning mark 120. For example, the opening mark 130 and the positioning mark 120 may have the same shape, such that the shortest distance W1 between any two points of the positioning mark 120 and the opening mark 130 is easily measured, thereby determining and aligning the corresponding position between the first substrate 100 and the optical adhesive layer 110.

In some embodiments, the display 10 may include a plurality of positioning marks 120 and a plurality of opening marks 130 to increase the accuracy of the position correspondence between the optical adhesive layer 110 and the first substrate 100. For example, a plurality of positioning marks 120 with different shapes may be formed on the first substrate 100, such that the optical adhesive layer 110 may be aligned with each positioning mark 120 through the plurality of opening marks 130. According to some embodiments of the invention, fig. 5A illustrates a top view of the display 20, wherein the display 20 is similar to the display 10 in fig. 1, except that the first substrate 100 has the positioning mark 120 and the positioning mark 126, the optical adhesive layer 110 has the opening mark 130 and the opening mark 136, and the positioning mark 120 has a different shape from the positioning mark 126. In other embodiments, the plurality of positioning marks 120 may be asymmetrically formed on the first substrate 100, thereby increasing the design possibilities of the display 10.

In some embodiments, the first substrate 100 may include additional marks to assist in attaching the optical adhesive layer 110 to the first substrate 100. FIG. 5B illustrates a cross-sectional view of a display 30 similar in location to the display 10 of FIG. 3, according to some embodiments of the present invention. The display 30 includes a first substrate 100, an optical adhesive layer 110 on the first substrate 100, and a second substrate 100' on the optical adhesive layer 110, wherein the first substrate 100 has a positioning mark 120, and the optical adhesive layer 110 has an opening mark 130. As shown in fig. 5B, the first substrate 100 further includes a mark 140 thereon, wherein the mark 140 may be formed by ink printing and has a size, shape or position different from the positioning mark 120. For example, when the optical adhesive layer 110 is attached to the first substrate 100, the opening mark 130 of the optical adhesive layer 110 can be aligned to the positioning mark 120, and the edge of the optical adhesive layer 110 can be simultaneously aligned to the mark 140, so as to improve the position correspondence accuracy between the optical adhesive layer 110 and the first substrate 100.

In some embodiments, the plurality of positioning marks 120 may be located on opposite sides of the optical adhesive layer 110, such that the optical adhesive layer 110 may be aligned with the first substrate 100 and the second substrate 100', respectively. FIG. 5C illustrates a cross-sectional view of a display 40 similar in cross-sectional location to the display 10 of FIG. 3, according to some embodiments of the present invention. The display 40 includes a first substrate 100, an optical adhesive layer 110 on the first substrate 100, and a second substrate 100 'on the optical adhesive layer 110, wherein the first substrate 100 has a positioning mark 120, the second substrate 100' has a positioning mark 120 ', and the optical adhesive layer 110 has an opening mark 130 and an opening mark 130'. As shown in fig. 5C, the vertical projection of the alignment mark 120 on the first substrate 100 falls within the vertical projection of the opening mark 130 on the first substrate 100, and the vertical projection of the alignment mark 120 'on the second substrate 100' falls within the vertical projection of the opening mark 130 'on the second substrate 100'. Since the first substrate 100 and the second substrate 100 'have the positioning mark 120 and the positioning mark 120', respectively, the optical adhesive layer 110 can have an accurate corresponding position with the first substrate 100 and the second substrate 100 'when being attached to the first substrate 100 and the second substrate 100'.

Fig. 6A to 6E are cross-sectional views illustrating various stages of an optical adhesive layer forming process according to some embodiments of the present invention, and fig. 7A to 7D are cross-sectional views illustrating various stages of a display bonding process, in which the optical adhesive layer formed in fig. 6A to 6E is used in the display bonding process illustrated in fig. 7A to 7D. It should be understood that the steps of the manufacturing process illustrated in fig. 6A-7D are merely exemplary, and one skilled in the art may add additional steps before, during, and after the illustrated steps of the manufacturing process, or may replace, reduce, or move the illustrated steps of the manufacturing process.

Referring to fig. 6A, an optical adhesive layer 210 is cut using an optical adhesive cutting die 1000, wherein the optical adhesive layer 210 has a heavy release film 200 and a heavy release film 202 on opposite surfaces thereof. The two opposite surfaces of the optical adhesive layer 210 have adhesiveness, so the heavy release film 200 and the heavy release film 202 can protect the adhesiveness of the optical adhesive layer 210 before the lamination process. When the optical adhesive cutting die 1000 cuts the optical adhesive layer 210, the cutting edge of the optical adhesive cutting die 1000 penetrates the heavy release film 202 and the optical adhesive layer 210 and stops on the heavy release film 200. Therefore, the optical adhesive cutting die 1000 forms the opening mark 220 penetrating through the optical adhesive layer 210 (as shown in subsequent fig. 6B), and maintains the complete heavy release film 200, so that the optical adhesive layer 210 can be attached to the heavy release film 200 to maintain the overall shape. In some embodiments, the outermost edge of the optical cutting die 1000 penetrates through the heavy release film 202, the optical adhesive layer 210 and the heavy release film 200, so that the optical adhesive layer 210 has a suitable length to meet the size of a carrier of a subsequent bonding process.

Referring to fig. 6B, the heavy release film 200 is cut using a heavy release film cutter die 1010. When the heavy release film cutting die 1010 cuts the heavy release film 200, the heavy release film cutting die 1010 can cut the heavy release film 200 alone to avoid cutting the heavy release film 202 and the optical adhesive layer 210, thereby maintaining the overall shape of the optical adhesive layer 210 and the opening mark 220. The cut heavy release film 200 has a suitable length to meet the size of a carrier of a subsequent bonding manufacturing process.

Referring to fig. 6C, the heavy release film 202 is replaced with a light release film 230. In the cutting process before fig. 6C, the cut heavy release film 202 has a hole corresponding to the opening mark 220, so that part of the optical adhesive layer 210 is exposed. Therefore, the heavy release film 202 is torn off and replaced with the complete light release film 230, so that the optical adhesive layer 210 can be protected from the light release film 230 and the heavy release film 200 in terms of adhesiveness, and the optical adhesive layer 210 can be stored before the subsequent lamination manufacturing process.

Referring to fig. 6D and 6E, the light release film 230 is cut using a light release film cutter mold 1020 to form a stack of the heavy release film 200, the optical adhesive layer 210, and the light release film 230, wherein the optical adhesive layer 210 has the opening mark 220. When the light release film cutting die 1020 cuts the light release film 230, the light release film cutting die 1020 can cut the light release film 230 alone to avoid cutting the heavy release film 200 and the optical adhesive layer 210, thereby maintaining the overall shape of the optical adhesive layer 210 and the opening mark 220. The cut light release film 230 has a suitable length to meet the size of the carrier of the subsequent bonding process.

Referring to fig. 7A, a stack of the heavy release film 200, the optical adhesive layer 210, and the light release film 230 is placed on the down-load stage 1030, and the substrate 240 is placed on the up-load stage 1040 to align the positions of the optical adhesive layer 210 and the substrate 240. The stack of the heavy release film 200, the optical cement layer 210, and the light release film 230 may be placed on the net sheet 1035 of the downloading stage 1030 and the position of the stack is fixed using vacuum suction such that the stacked light release film 230 faces the uploading stage 1040 upward. The substrate 240 has a pre-formed alignment mark 250 and may be vacuum-sucked on the upper stage 1040 such that the alignment mark 250 of the substrate 240 faces the light release film 230. By photographing the opening marks 220 of the image-taking optical adhesive layer 210 and the positioning marks 250 of the substrate 240 and measuring the distance therebetween, the relative position between the downloading stage 1030 and the uploading stage 1040 can be adjusted such that the vertical projection of the positioning marks 250 on the substrate 240 falls within the vertical projection of the opening marks 220 on the substrate 240, and the shortest distance between any two points of the positioning marks 250 and the opening marks 220 is equal.

Referring to fig. 7B, the light release film 230 is removed and the optical adhesive layer 210 is exposed. The light release film 230 on the optical adhesive layer 210 is removed, so that the adhesive surface of the optical adhesive layer 210 is exposed and faces the substrate 240 adsorbed on the upper stage 1040, so as to attach the optical adhesive layer 210 to the substrate 240 in a subsequent manufacturing process.

Referring to fig. 7C and 7D, the optical adhesive layer 210 is rolled on the substrate 240 by using a roller 1050 to form a stack of the substrate 240, the optical adhesive layer 210 and the heavy release film 200. Roller 1050 is located in the downloading station 1030 and below the screen 1035, so that when the roller 1050 pushes the screen 1035 upwards, the portion of the heavy release film 200 and the optical adhesive layer 210 above the screen 1035 further approaches the substrate 240, so that the optical adhesive layer 210 contacts and adheres to the substrate 240. Since the relative position between the optical adhesive layer 210 and the substrate 240 is previously confirmed by using the opening marks 220 and the positioning marks 250, the optical adhesive layer 210 can be precisely attached on the substrate 240, and the error of the attachment position is reduced, thereby increasing the reliability of the display formed by the optical adhesive layer 210 and the substrate 240. In some embodiments, a manufacturing process similar to that shown in fig. 7A to 7D may be further used to remove the heavy release film 200 and attach the optical adhesive layer 210 to other elements, so that the substrate 240 and other elements may form an element stack of the display through the optical adhesive layer 210.

According to the above embodiments of the present invention, the display of the present invention includes a substrate having a positioning mark and an optical adhesive layer having an opening mark. Since the perpendicular projection of the positioning mark on the substrate falls within the perpendicular projection of the opening mark on the substrate, and the shortest distance between any two points of the positioning mark and the opening mark is equal, the substrate and the optical adhesive layer can accurately correspond to the position of each other through the positioning mark and the opening mark. Therefore, the positioning mark and the opening mark can reduce the position error of the optical adhesive layer attached on the substrate, thereby increasing the reliability of the display. On the other hand, the positioning marks and the opening marks can reduce the shape limitation of the substrate and the optical adhesive layer, so that the substrate and the optical adhesive layer can form a display with a special-shaped display area, and the design diversity of the display is increased.

The foregoing outlines features of some embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present invention as a basis for designing or modifying other manufacturing processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.

Claims (13)

1. A display, comprising:

a first substrate including a first positioning mark;

the optical adhesive layer is positioned on the first substrate and comprises a first opening mark, the vertical projection of the first positioning mark on the first substrate is in the vertical projection of the first opening mark on the first substrate, and the shortest distance between any two points of the first positioning mark and the first opening mark is equal; and

the second substrate is positioned on the optical adhesive layer.

2. The display of claim 1, wherein the shortest distance between the first positioning mark and the first opening mark is between 0.3mm and 5 mm.

3. The display of claim 1, wherein the first positioning mark and the first opening mark have the same shape.

4. The display of claim 1, wherein the first opening mark is in the shape of a straight line, including an L-shape, a cross-shape, or a rectangle.

5. The display of claim 1, wherein the first opening indicia is a perfect circle.

6. The display of claim 1, wherein the first alignment mark is formed on the first substrate by ink printing.

7. The display of claim 1, wherein the optical glue layer has a profiled edge.

8. The display of claim 1, wherein the first opening mark is connected to an edge of the optical adhesive layer.

9. The display of claim 1, wherein the first opening mark is separated from an edge of the optical glue layer.

10. The display of claim 1, wherein the first substrate comprises a shaped display area, and a perpendicular projection of the first opening mark on the first substrate falls outside the shaped display area.

11. The display of claim 1, wherein the first substrate comprises a pixel area, and a perpendicular projection of the first opening mark on the first substrate falls outside the pixel area.

12. The display of claim 1, wherein the first substrate comprises a second positioning mark, the optical adhesive layer comprises a second opening mark, a vertical projection of the second positioning mark on the first substrate falls within a vertical projection of the second opening mark on the first substrate, and the second positioning mark has a different shape than the first positioning mark.

13. The display of claim 1, wherein the optical adhesive layer comprises a second opening mark, the second substrate comprises a second positioning mark, a vertical projection of the second positioning mark on the second substrate falls within a vertical projection of the second opening mark on the second substrate, and a shortest distance between any two points of the second positioning mark and the second opening mark is equal.

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