CN114038316B - Display with optical adhesive layer - Google Patents
Display with optical adhesive layer Download PDFInfo
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- CN114038316B CN114038316B CN202111293115.0A CN202111293115A CN114038316B CN 114038316 B CN114038316 B CN 114038316B CN 202111293115 A CN202111293115 A CN 202111293115A CN 114038316 B CN114038316 B CN 114038316B
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- substrate
- mark
- display
- adhesive layer
- opening
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- 230000003287 optical effect Effects 0.000 title claims abstract description 142
- 239000012790 adhesive layer Substances 0.000 title claims abstract description 80
- 239000000758 substrate Substances 0.000 claims abstract description 165
- 239000010410 layer Substances 0.000 claims description 57
- 239000004568 cement Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 description 15
- 239000003292 glue Substances 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000003384 imaging method Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 238000003475 lamination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Instrument Panels (AREA)
Abstract
The invention discloses a display with an optical adhesive layer, which comprises a first substrate with a positioning mark, the optical adhesive layer which is positioned on the first substrate and is provided with an opening mark, and a second substrate which is positioned on the optical adhesive layer, wherein the vertical projection of the positioning mark on the first substrate is in the vertical projection of the opening mark on the first substrate, and any two points of the positioning mark are equal to the shortest distance of the opening mark.
Description
Technical Field
The present invention relates to displays, and in particular to displays with optical cement.
Background
The display has multiple layers of elements and is combined with a device by a suitable adhesive layer to provide complete imaging or additional other functions. For example, a full-attached (direct bonding) display completely adheres the display panel and the cover layer thereon through the optical adhesive, so that the gap between the display panel and the cover layer is reduced, thereby increasing the durability and definition of the display. As designs and demands of displays are gradually diversified, how to provide accurate optical adhesive 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, there is provided a display including a first substrate, an optical adhesive layer disposed on the first substrate, and a second substrate disposed 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 shortest distances between any two points of the first positioning mark and the first opening mark are equal.
In some embodiments of the invention, the shortest distance between the first positioning mark and the first opening mark is between 0.3mm and 5mm.
In some embodiments of the invention, the first positioning mark and the first opening mark have the same shape.
In some embodiments of the 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 marker is a perfect circle.
In some embodiments of the invention, the first positioning mark is formed on the first substrate by ink printing.
In some embodiments of the invention, the optical cement layer has a profiled edge.
In some embodiments of the invention, the first opening mark connects to an edge of the optical cement layer.
In some embodiments of the invention, the first opening mark is separated from the edge of the optical cement layer.
In some embodiments of the invention, the first substrate includes a display area, and the vertical projection of the first opening mark on the first substrate falls outside the display area.
In some embodiments of the invention, the first substrate includes a pixel region, and a vertical projection of the first opening mark on the first substrate falls outside the pixel region.
In some embodiments of the invention, the first substrate includes a second positioning mark, the optical adhesive layer includes a second opening mark, a perpendicular projection of the second positioning mark on the first substrate falls within a perpendicular projection of the second opening mark on the first substrate, and a shape of the second positioning mark is different from 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 perpendicular projection of the second positioning mark on the second substrate falls within a perpendicular 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. Indeed, 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 invention;
FIG. 2 is a perspective configuration 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 invention;
FIGS. 5B-5C are cross-sectional views of a display according to some embodiments of the invention;
FIGS. 6A-6E are cross-sectional views illustrating various stages of an optical glue layer forming process according to some embodiments of the invention;
fig. 7A-7D are cross-sectional views illustrating various stages of a display bonding process according to some embodiments of the invention.
Symbol description
10,20,30,40 Displays
100 First substrate
100': Second substrate
102 Pixel region
104 Display area
110 Optical cement layer
120,120',122,124,126: Locating marks
130,130',132,134,136: Opening indicia
140 Marking
200,202 Heavy Release film
210 Optical cement layer
220 Open mark
230 Light release film
240 Substrate
250 Positioning mark
1000 Optical cement knife die
1010 Heavy release film cutting die
1020 Light release film cutting die
1030 Download table
1035 Screen plate
1040 Upload platform
1050 Roller wheel
A-a' section line
W1, W2 distance
Detailed Description
The following disclosure provides many different embodiments, or examples, for implementing different features of the subject matter. Specific examples of components, values, configurations, etc. are described below to simplify the present disclosure. Of course, these are merely examples and are not 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 physical and/or electrical connections. Furthermore, an "electrical connection" or "coupling" may exist between two elements.
As used herein, "about," "approximately," or "substantially" includes both the recited values and average values within an acceptable deviation of the particular values as determined by one of ordinary skill in the art, taking into account the particular values of the measurement and measurement-related errors in question (i.e., limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the values, or within ±30%, ±20%, ±10%, ±5%. Further, "about," "approximately," or "substantially" as used herein may be used to select a range of acceptable deviations or standard deviations depending on the optical, etching, or other properties, and may be used for all properties without one standard deviation.
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 comprising a substrate and an optical cement layer, wherein the substrate comprises a positioning mark and the optical cement layer comprises an opening mark. 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 to the substrate, thereby increasing the reliability of the display.
Referring to fig. 1-3, fig. 1 illustrates a top view of a display 10 according to some embodiments of the invention, fig. 2 illustrates a disassembled perspective configuration of the display 10 of fig. 1, and fig. 3 illustrates a cross-sectional view of the display 10 of fig. 1 along a section line A-A'. The display 10 comprises a first substrate 100, an optical glue layer 110 on the first substrate 100, and a second substrate 100' on the optical glue layer 110, wherein the first substrate 100 comprises positioning marks 120 on a surface of the first substrate 100, and the optical glue layer 110 comprises opening marks 130 passing through the optical glue layer 110. It should be understood that some elements of display 10 are not shown in fig. 1-3 to simplify the drawing, and that display 10 may include additional elements in other embodiments.
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 vertical projection of the positioning mark 120 on the first substrate 100 falls within the vertical 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 functions of being positioned corresponding 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 be of a suitable material to be a stacked assembly 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 chip) or a flexible substrate (e.g., polyethylene terephthalate (polyethylene terephthalate, PET) or polymethyl methacrylate (poly (methyl methacrylate), PMMA)), and the second substrate 100 'may be a protective layer (e.g., a plastic cover plate including colorless polyimide (colorless polymide, 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 with a display element, and the second substrate 100 'may be a touch layer with 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 a 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 panel (LCD) CRYSTAL DISPLAY, a light-emitting diode panel (light-emitting diode display), etc.) having a pixel region 102, wherein the pixel region 102 includes a plurality of pixel units for providing an imaging function of the display 10. If the positioning mark 120 is formed in the pixel region 102, the plurality of pixel units of the pixel region 102 may affect the flatness of the positioning mark 120 formed on the first substrate 100. On the other hand, the positioning mark 120 may affect the imaging effect of the pixel region 102. Therefore, forming the positioning mark 120 outside the pixel region 102 can avoid the pixel region 102 and the positioning mark 120 from adversely affecting each other.
In some embodiments, the second substrate 100 'may include a 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 an 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 area 104 of the second substrate 100' may be a free form display area. Herein, "shaped" is used to refer to a shape in which at least a portion of the edge is non-linear, such as the display region 104 shown in fig. 1 having a combination of straight and curved shapes. 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 increases, thereby increasing the design possibilities of the display 10.
In some embodiments, the optical cement layer 110 may be of a suitable material such that the first substrate 100 may be attached to the second substrate 100' through the optical cement layer 110. Specifically, the optical adhesive layer 110 has high light transmittance and low refractive index difference from the first and second substrates 100 and 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 cement layer 110 has good ductility and adhesion, so as to be flatly attached to the first substrate 100 and the second substrate 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, thereby increasing the application range of the optical adhesive layer 110. As described above, the optical adhesive layer 110 and the first substrate 100 are corresponding to the positions of the opening marks 130 and the positioning marks 120, and 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 are not used as corresponding standards. Therefore, the above-described elements or regions may have different shapes, thereby increasing the combination diversity of the optical cement layer 110 and the first and second substrates 100 and 100'. It should be 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 the display region 104 having various shapes, thereby increasing the design possibilities 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 avoid that the positioning mark 120 of the first substrate 100 and the opening mark 130 of the optical adhesive layer 110 affect 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 areas of the pixel region 102 and the display region 104, such that the opening mark 130 may 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 may 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 also 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 proper 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 a 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 lacking between the positioning mark 120 and the opening mark 130, so that it is difficult to control the position of the optical adhesive layer 110 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 accuracy of the position correspondence between the optical adhesive layer 110 and the first substrate 100 is reduced, thereby reducing 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 positional correspondence accuracy between the optical adhesive layer 110 and the first substrate 100. Fig. 4A illustrates an enlarged top view of the positioning indicia 120 and the opening indicia 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 such 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 depict enlarged top views of the positioning marks 122, 124 and 126 and the opening marks 132, 134 and 136, with enlarged areas similar to those shown in fig. 4A, according to some embodiments of the invention. As shown in fig. 4A, the positioning mark 120 and the opening mark 130 may be right circular. 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 marks 120 and the opening marks 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 separate from the edge of the optical cement layer 110 such that the entirety of the positioning mark 120 may be located within the area of the optical cement layer 110. As shown in fig. 4A, the opening mark 130 is entirely located within the optical cement layer 110 to be separated from the edge of the optical cement 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 cement layer 110. In some embodiments, the opening mark 130 may connect to an edge of the optical cement layer 110 such that the positioning mark 120 may be partially surrounded by the optical cement layer 110. As shown in fig. 4D, both ends of the opening mark 130 are respectively connected to edges of the optical cement layer 110 such that the optical cement 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, the 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. Alternatively, the opening mark 130 passing through the optical adhesive layer 110 may be formed with a cutter in cooperation with the design of the positioning mark 120 such 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, so 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 positions 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 cement layer 110 and the first substrate 100. For example, a plurality of positioning marks 120 having 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. Fig. 5A shows a top view of a display 20 according to some embodiments of the present invention, wherein the display 20 is similar to the display 10 of fig. 1, except that the first substrate 100 has a positioning mark 120 and a positioning mark 126, the optical adhesive layer 110 has an opening mark 130 and an opening mark 136, and the positioning mark 120 has a shape different 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 cross-sectional position 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 glue layer 110 on the first substrate 100, and a second substrate 100' on the optical glue layer 110, wherein the first substrate 100 has a positioning mark 120, and the optical glue 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 ink-printed and have 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 marks 130 of the optical adhesive layer 110 may be aligned with the positioning marks 120, and the edges of the optical adhesive layer 110 may be simultaneously aligned with the marks 140, thereby improving the accuracy of the position correspondence between the optical adhesive layer 110 and the first substrate 100.
In some embodiments, the plurality of positioning marks 120 may be located at opposite sides of the optical cement layer 110 such that the optical cement 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 position 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 glue layer 110 on the first substrate 100, and a second substrate 100 'on the optical glue layer 110, wherein the first substrate 100 has a positioning mark 120, the second substrate 100' has a positioning mark 120', and the optical glue layer 110 has an opening mark 130 and an opening mark 130'. As shown in fig. 5C, the vertical projection of the positioning 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 positioning 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 precise corresponding positions 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-6E are cross-sectional views illustrating various stages of an optical glue layer formation process according to some embodiments of the present invention, and fig. 7A-7D are cross-sectional views illustrating various stages of a display bonding process, wherein the display bonding process illustrated in fig. 7A-7D uses the optical glue layer formed in fig. 6A-6E. It should be understood that the fabrication process steps depicted in fig. 6A-7D are by way of example only, and that one skilled in the art may add additional steps before, during, and after the depicted fabrication process, or may replace, reduce, or shift the depicted fabrication process steps.
Referring to fig. 6A, an optical cement layer 210 is cut using an optical cement knife mold 1000, wherein the optical cement layer 210 has a re-release film 200 and a re-release film 202 on opposite surfaces thereof. The 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 manufacturing process. When the optical cement cutting die 1000 cuts the optical cement layer 210, the cutting edge of the optical cement cutting die 1000 passes through the heavy release film 202 and the optical cement layer 210 and stops on the heavy release film 200. Thus, the optical cement mold 1000 forms the opening mark 220 (as shown in fig. 6B later) passing through the optical cement layer 210 and maintains the complete heavy release film 200, so that the optical cement 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 cement knife mold 1000 passes through the heavy release film 202, the optical cement layer 210, and the heavy release film 200 such that the optical cement layer 210 has a suitable length to conform to the stage dimensions of the subsequent conforming fabrication process.
Referring to fig. 6B, the heavy release film 200 is cut using a heavy release film die 1010. When the heavy release film die 1010 cuts the heavy release film 200, the heavy release film 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 conform to the carrier dimensions of the subsequent lamination process.
Referring to fig. 6C, the heavy release film 202 is replaced with the light release film 230. In the prior art dicing process of fig. 6C, the diced heavy release film 202 has holes corresponding to the opening marks 220, so that a portion of the optical adhesive layer 210 is exposed. Thus, 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 by the light release film 230 and the heavy release film 200, and the optical adhesive layer 210 can be preserved before the subsequent lamination process.
Referring to fig. 6D and 6E, the light release film 230 is cut using a light release film die 1020 to form a stack of heavy release film 200, optical adhesive layer 210, and light release film 230, wherein the optical adhesive layer 210 has an opening mark 220. When the light release film cutter 1020 cuts the light release film 230, the light release film cutter 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 conform to the stage dimensions of the subsequent lamination process.
Referring to fig. 7A, a stack of heavy release film 200, optical cement layer 210, and light release film 230 is placed on a download table 1030, and substrate 240 is placed on an upload table 1040 to align the positions of optical cement layer 210 and substrate 240. The stack of heavy release film 200, optical glue layer 210, and light release film 230 may be placed on screen 1035 of download table 1030 and the position of the stack fixed using vacuum suction such that the stacked light release film 230 faces upward to upload table 1040. The substrate 240 has a preformed alignment mark 250 and may be vacuum-adsorbed to the upload stage 1040 such that the alignment mark 250 of the substrate 240 faces the light release film 230. By capturing the opening mark 220 like the optical adhesive layer 210 and the positioning mark 250 of the substrate 240 and measuring the distance therebetween, the relative position between the download table 1030 and the upload table 1040 can be adjusted such that the vertical projection of the positioning mark 250 on the substrate 240 falls within the vertical projection of the opening mark 220 on the substrate 240, and any two points of the positioning mark 250 and the shortest distance of the opening mark 220 are equal.
Referring to fig. 7B, the light release film 230 is torn off and the optical adhesive layer 210 is exposed. The light release film 230 above the optical adhesive layer 210 is torn off, so that the adhesive surface of the optical adhesive layer 210 is exposed and faces the substrate 240 adsorbed on the uploading table 1040, and the optical adhesive layer 210 is attached to the substrate 240 in the subsequent manufacturing process.
Referring to fig. 7C and 7D, the optical cement layer 210 is roll-attached to the substrate 240 using the roller 1050 to form a stack of the substrate 240, the optical cement layer 210 and the re-release film 200. The roller 1050 is positioned in the download table 1030 and below the web 1035, so that when the roller 1050 pushes the web 1035 upward, the portion of the heavy release film 200 above the web 1035 and the optical adhesive layer 210 further approach the substrate 240, such that the optical adhesive layer 210 contacts and adheres to the substrate 240. Since the relative positions between the optical cement layer 210 and the substrate 240 are confirmed using the opening marks 220 and the positioning marks 250 previously, the optical cement layer 210 can be precisely attached on the substrate 240, and errors in attaching positions are reduced, thereby increasing reliability of a display formed by the optical cement layer 210 and the substrate 240. In some embodiments, a fabrication process similar to that shown in fig. 7A-7D may be further used to tear away heavy release film 200 and attach optical adhesive layer 210 to other components such that substrate 240 and other components may form a stack of components of the display through optical adhesive layer 210.
According to the above embodiment 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 vertical projection of the positioning mark on the substrate falls within the vertical projection of the opening mark on the substrate, and the shortest distances of any two points of the positioning mark and the opening mark are equal, the substrate and the optical adhesive layer can accurately correspond to each other in position 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 to the substrate, thereby increasing the reliability of the display. On the other hand, the positioning mark and the opening mark 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 invention. Those skilled in the art should appreciate that they may readily use the present invention as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. It should also be understood by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention, and that they can make various changes, substitutions and alterations herein without departing from the spirit and scope of the invention.
Claims (8)
1. A display, comprising:
A first substrate including a first positioning mark;
the optical adhesive layer is positioned on the first substrate, wherein the optical adhesive layer comprises a first opening mark, two ends of the first positioning mark are respectively connected with the edge of the optical adhesive layer, so that the optical adhesive layer partially surrounds the first positioning mark, and any two points of the first positioning mark are equal to the shortest distance of the first opening mark; and
The second substrate is positioned on the optical adhesive layer.
2. The display of claim 1, wherein a shortest distance between the first positioning mark and the first opening mark is between 0.3mm and 5mm.
3. The display of claim 1, wherein the first positioning mark is formed on the first substrate by ink printing.
4. The display of claim 1, wherein the optical cement layer has a contoured edge.
5. The display of claim 1, wherein the first substrate comprises a shaped display area, a vertical projection of the first opening mark on the first substrate falling outside the shaped display area.
6. The display of claim 1, wherein the first substrate includes a pixel area, a vertical projection of the first opening mark on the first substrate falling outside the pixel area.
7. The display of claim 1, wherein the first substrate comprises a second alignment mark, the optical adhesive layer comprises a second opening mark, a perpendicular projection of the second alignment mark on the first substrate falls within a perpendicular projection of the second opening mark on the first substrate, and a shape of the second alignment mark is different from the first alignment mark.
8. The display of claim 1, wherein the optical adhesive layer comprises a second opening mark, the second substrate comprises a second positioning mark, a perpendicular projection of the second positioning mark on the second substrate falls within a perpendicular 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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| TW110115933 | 2021-05-03 | ||
| TW110115933A TWI770980B (en) | 2021-05-03 | 2021-05-03 | Display device with optical clear adhesion |
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| CN114038316A CN114038316A (en) | 2022-02-11 |
| CN114038316B true CN114038316B (en) | 2024-05-14 |
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| TW (1) | TWI770980B (en) |
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| TWI770980B (en) | 2022-07-11 |
| CN114038316A (en) | 2022-02-11 |
| TW202244573A (en) | 2022-11-16 |
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