TWI796906B - Photomask and method for manufacturing display device - Google Patents

Abstract

A light curing device includes a supporting platform, a photomask and an ultraviolet light source. The supporting platform is configured to support a display device. A display module of the display device is connected to a cover plate of the display device by optical cement. The photomask is arranged above the display device, and the photomask includes a central area and a peripheral area. The ultraviolet light source is configured to emit ultraviolet light to pass through the photomask to the display device, thereby curing the optical cement. The light transmittance of the central area is less than the light transmittance of the peripheral area, so that the hardness of the optical cement corresponding to the peripheral area is greater than the hardness of the optical cement corresponding to the central area.

Description

Method for manufacturing photomask and display device

The present disclosure relates to a photocuring device, in particular to a photocuring device capable of forming optical adhesives with different hardnesses.

With the development of technology, display has become a very popular electronic product in today's consumer products, whether it is very popular in television or personal computer related fields. And due to the development of science and technology, the size of the display is also increasing to meet people's needs.

In general, displays go through four processes: gluing, bonding, defoaming, and curing. In the curing process, the display is placed in a curing furnace, and the optical glue on the display is cured by the irradiation of the curing light source in the curing furnace. However, the optical glue will shrink to a certain extent after curing, and the stress generated by it may affect the service life of the display.

Therefore, how to design a photocuring device that can increase the service life is a topic worth discussing and solving.

In view of this, the present disclosure proposes a photocuring device to solve the above problems.

The present disclosure provides a photocuring device, which includes a carrier table, a photomask, and an ultraviolet light source. The carrying platform is configured to carry a display device. A display module of the display device is connected to a cover plate of the display device through an optical glue. The photomask is arranged above the display device, and the photomask includes a central area and a peripheral area. The ultraviolet light source is configured to emit ultraviolet light through the mask to the display device, so as to cure the optical glue. The light transmittance of the central area is smaller than that of the peripheral area, so that the hardness of the optical glue corresponding to the peripheral area is greater than the hardness of the optical glue corresponding to the central area.

According to some embodiments of the present disclosure, the projection of the central area on the display device covers a bending area of the display device, the peripheral area and the central area are adjacent to each other, and the length of the central area is less than or equal to 15% of the total length of the mask.

According to some embodiments of the present disclosure, the central region includes a central subregion and N side subregions, and the first side subregion to the Nth side subregion among the central subregion and the N side subregions The light transmittance increases sequentially from the center of the mask to the surrounding area, where N is a natural number.

According to some embodiments of the present disclosure, the first side sub-region to the Nth side sub-region are sequentially arranged from the center of the mask toward the peripheral region.

The present disclosure proposes a manufacturing method of a display device, comprising: disposing a display device on a carrier platform; disposing a photomask above the display device, wherein the photomask includes a central area and a peripheral area; and providing an ultraviolet light source to emit a The ultraviolet light passes through the mask to the display device to cure an optical adhesive of the display device, wherein the ultraviolet light irradiates a front side of the optical adhesive. The light transmittance of the central area is smaller than that of the peripheral area, so that the hardness of the optical glue corresponding to the peripheral area is greater than that of the optical glue corresponding to the central area.

According to some embodiments of the present disclosure, the manufacturing method of the display device further includes: connecting a display module of the display device to a cover plate of the display device by optical glue; and connecting the display module to the cover plate by optical glue Previously, UV light was provided through the mask to illuminate a back side of the optical adhesive.

According to some embodiments of the present disclosure, the central area forms a plurality of graphic parts, each of these graphic parts has a rectangular structure and extends along a first direction, these graphic parts are arranged along a second direction, and the first direction is perpendicular In the second direction, the light transmittance of these graphic parts is equal to the light transmittance of the surrounding area.

According to some embodiments of the present disclosure, the optical glue corresponding to the central region includes a plurality of first cured portions and a plurality of second cured portions after being cured, each of the first cured portions has a long trapezoidal column structure, And each of the second cured parts has a triangular prism structure, wherein the hardness of the first cured part is greater than that of the second cured part.

According to some embodiments of the present disclosure, the central area forms a plurality of graphic parts, each of these graphic parts has a rectangular structure, and these graphic parts are arranged in a matrix, wherein the light transmittance of these graphic parts is equal to that of the surrounding area. transmittance.

According to some embodiments of the present disclosure, the optical glue corresponding to the central area includes a plurality of first cured portions and a second cured portion after being cured, these first cured portions correspond to the pattern portions, each of these first cured portions One has a trapezoidal column structure, and the hardness of these first cured parts is greater than that of the second cured parts.

The disclosure provides a photocuring device, including a carrier platform, a photomask, and an ultraviolet light source. The carrying platform is configured to carry a display device, the photomask is arranged above the display device, and the photomask includes a central area and a peripheral area. The ultraviolet light source is configured to emit ultraviolet light through the mask to the display device, so as to cure the optical glue.

Since the light transmittance of the central area is smaller than that of the peripheral area, the hardness of the optical glue corresponding to the peripheral area is greater than that corresponding to the central area. Based on this design, when the display device is bent, the compressive stress in the central bending region can be reduced, thereby avoiding the problem of wavy creases caused by the stress concentration of the display device during bending.

The words "comprising" and "comprising" mentioned throughout the specification and scope of patent application are open-ended terms, so they should be interpreted as "including but not limited to". The term "approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and achieve the basic technical effect.

Various embodiments of the present invention will be described in detail with the associated drawings. The same reference numbers are used in the drawings to refer to the same or similar elements. The purpose of these examples is to illustrate the general principles of the invention and should not be construed in a limiting sense. Detailed descriptions of well-known functions and constructions will be omitted to avoid obscuring the subject matter of the present invention.

It is worth noting that references to "a" or "an" embodiment in this disclosure are not necessarily to the same embodiment, and references to at least one. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is recognized that, whether described in detail or not, a person of ordinary skill in the art can refer to such feature within the scope of knowledge in the art , structures or characteristics are linked with the rest of the embodiments.

Please refer to FIG. 1 , which is a three-dimensional schematic diagram of a photocuring device 50 according to an embodiment of the present disclosure. The photocuring device 50 includes a carrying platform 52 and a chamber 54 , and the chamber 54 is fixedly disposed on the carrying platform 52 . The carrier table 52 may include a conveyor belt 58 configured to carry a display device 60 and transport the display device 60 into the chamber 54 for photocuring.

Please refer to FIG. 2 , which is a schematic diagram of a display device 60 disposed in a chamber 54 according to an embodiment of the present disclosure. The chamber 54 is, for example, a closed space, and an ultraviolet light source 56 is disposed therein, configured to emit ultraviolet light 561 to the display device 60 . Wherein, the ultraviolet light 561 is, for example, perpendicular to the display device 60 . Furthermore, the ultraviolet light source 56 has a long strip structure extending along a long axis direction LX, and the intensity of the ultraviolet light 561 emitted by the ultraviolet light source 56 at each position on the long axis direction LX is all equal, for example, all are 5000 mJ.

The display device 60 includes a display module 64 and a cover 66 . The cover plate 66 is connected to the display module 64 through an optical glue 68 . The cover plate 66 is, for example, made of flexible glass material, but is not limited thereto. The optical adhesive 68 can be an ultraviolet adhesive, for example. After receiving the ultraviolet light 561 emitted by the ultraviolet light source 56 , the optical adhesive 68 will be cured so that the cover plate 66 can be firmly connected to the display module 64 .

The photocuring device 50 further includes a photomask 100 disposed in the chamber 54 and disposed above the display device 60 . That is, the photomask 100 is disposed between the ultraviolet light source 56 and the display device 60 . Wherein, the length of the ultraviolet light source 56 in the long-axis direction LX can be greater than the length of the display device 60 or the mask 100 in the long-axis direction LX, so as to ensure that the optical glue 68 on the display device 60 can indeed receive the ultraviolet light 561 .

In this embodiment, the mask 100 includes a central area 102 , a peripheral area 104 and a peripheral area 106 . Wherein, the peripheral area 104 and the peripheral area 106 are symmetrical to the central area 102 , and the light transmittance of the central area 102 is smaller than the light transmittance of the peripheral area 104 and the peripheral area 106 . For example, the light transmittance of the central area 102 is 10%-80% of the light transmittance of the peripheral area 104 and the peripheral area 106 , but it is not limited thereto.

In this embodiment, the two peripheral regions 104, 106 do not affect the intensity of the ultraviolet light 561 (that is, the intensity of the light passing through the peripheral regions 104, 106 is still 5000 millijoules), but the ultraviolet rays passing through the central region 102 The intensity of light 561 may be reduced to, for example, 2000 millijoules or less. Based on this design, the hardness of the optical glue 68 corresponding to the two peripheral regions 104 and 106 after curing is greater than the hardness of the optical glue 68 corresponding to the central region 102 after curing. That is, the hardness of the peripheral adhesive portions 684 and 686 of the optical adhesive 68 is greater than the hardness of the central adhesive portion 682 .

In addition, a bending region CR can be defined on the display module 64 . The bending region CR is located at the center of the display device 60 and corresponds to the central region 102 and the central rubber portion 682 . The bending region CR may be 5%˜15% of the total length of the display device 60 in the long axis direction LX, but is not limited thereto. The range of the bending region CR will vary with the design of the display device 60 .

As shown in FIG. 2 , the projection of the central area 102 along the Z axis on the display device 60 will cover the bending area CR. Furthermore, in this embodiment, the two peripheral regions 104 , 106 are adjacent to the central region 102 , and the length of the central region 102 may be less than or equal to 15% of the total length of the photomask 100 . The length of the bending region CR may be equal to or less than that of the central region 102 to ensure that the ultraviolet light 561 passing through the central region 102 can completely irradiate the bending region CR.

Please refer to FIG. 2 to FIG. 4. FIG. 3 is a schematic diagram showing the bending of the display device 60 according to an embodiment of the present disclosure, and FIG. 4 is a curing process of the display device 60 according to an embodiment of the present disclosure during bending. The compressive stress distribution diagram of the optical glue 68 after. As shown in FIG. 4 , the leftmost (origin) of the position coordinates corresponds to the left edge of the optical glue 68 in FIG. 3 , and the rightmost of the position coordinates corresponds to the right edge of the optical glue 68 in FIG. 3 .

In FIG. 4 , the curve CL1 represents the compressive stress distribution of the optical glue 68 irradiated with the photomask 100 , and the curve CL0 represents the compressive stress distribution of the optical glue 68 irradiated without the photomask 100 . As shown in the figure, the peak value of the curve CL1 is obviously smaller than the peak value of the curve CL0, that is, it is smaller than the maximum compressive stress SFC, so that after the display device 60 has been bent many times, the wavy shape at the bending region CR due to stress concentration can be avoided. The problem of bucking.

It is worth noting that if the photomask 100 is not provided, since the peak value of the compressive stress of the optical adhesive 68 during bending is equal to the maximum compressive stress SFC, the stress will be excessively concentrated. After multiple times of bending, the cover plate 66 and the optical adhesive 68 will be partially detached at the bending region CR, resulting in irreversible wavy creases, which affect the overall visibility of the display device 60 . The above-mentioned problems can be avoided by the photomask 100 of the present disclosure.

Please refer to FIG. 5 , which is a top view of a photomask 100 according to an embodiment of the present disclosure. In this embodiment, a plurality of graphic parts 107 can be formed on the central area 102, wherein the light transmittance of these graphic parts 107 can be lower than the light transmittance of the peripheral areas 104, 106, and the parts other than the graphic parts 107 (not The light transmittance of the graphic part 109 ) may be equal to the light transmittance of the surrounding areas 104 and 106 . However, in other embodiments, the graphics portion 107 and the non-graphics portion 109 can be implemented in opposite configurations.

As shown in FIG. 5 , the shape of the graphic part 107 may be a rectangle, but is not limited thereto, for example, may be a circle, an ellipse, a triangle, a square, or a rectangle. In addition, the shape of the graphic part 107 on the central area 102 may also be a combination of the above shapes. In other embodiments, the graphic portion 107 of the central area 102 may include a combination of circles and squares arranged in an alternate manner.

Please refer to FIG. 6 , which is a schematic front view of a photomask 100A according to another embodiment of the present disclosure. In this embodiment, the central area 102 may include a central sub-area SC0 and two sets of N side sub-areas, and the central sub-area SC0 and the first side sub-area SC1 to the first side sub-area among the N side sub-areas The light transmittances of the N side sub-regions SCN increase sequentially from the center of the mask 100A toward the peripheral region 104 (or the peripheral region 106 ).

That is, the light transmittance of the first side subregion SC1 is smaller than the light transmittance of the second side subregion SC2, and the light transmittance of the second side subregion SC2 is smaller than that of the third side subregion SC2. The light transmittance of the edge sub-region SC3, and the rest can be deduced by analogy.

Wherein, N is a natural number, and each side sub-region has the same width, and the width of the central region 102 may be twice the width of each side sub-region, but not limited thereto. As shown in FIG. 6, the Nth side subregion SCN is adjacent to the corresponding peripheral region, and the first side subregion SC1 to the Nth side subregion SCN are from the center of the mask 100A toward The corresponding surrounding areas are arranged sequentially. In addition, it is worth noting that the two groups of N side sub-regions are symmetrical to the central sub-region SC0.

Based on this structural configuration, the change of the compressive stress corresponding to the bending region CR can be further moderated, so as to reduce the risk of wavy creases on the display device 60 .

Please refer to FIG. 7 to FIG. 9. FIG. 7 is a schematic top view of a photomask 100B according to another embodiment of the present disclosure, and FIG. 8 is a schematic view of an ultraviolet light source 56 passing through a photomask 100B according to another embodiment of the present disclosure. A schematic diagram of an irradiated display device 60 , and FIG. 9 is a perspective schematic diagram of an irradiated optical adhesive 68 according to another embodiment of the present disclosure.

In this embodiment, the central area 102 forms a plurality of graphic parts 107, each of these graphic parts 107 has a rectangular structure, extends along a first direction D1, and these graphic parts 107 are arranged along a second direction D2 , wherein the first direction D1 is perpendicular to the second direction D2. In this embodiment, the light transmittances of the graphic parts 107 are equal to the light transmittances of the surrounding areas 104 and 106 .

For example, the light transmittance of the pattern portion 107 and the surrounding areas 104 and 106 may be 95-100%, but not limited thereto. In some embodiments, the graphic portion 107 can be made of a transparent material, for example, made of the same material as the surrounding areas 104 and 106 . However, in some other embodiments, the graphic part 107 may also be implemented in the form of a hole.

In addition, the central area 102 further includes a non-pattern portion 109 whose light transmittance is lower than that of the pattern portion 107 and the peripheral areas 104 and 106 . For example, a coating is formed on the non-pattern portion 109 to make the light transmittance of the non-pattern portion 109 5-15%, but not limited thereto.

Please refer to Figures 8 to 10. FIG. 10 is an enlarged schematic diagram of a display device 60 according to another embodiment of the disclosure when it is bent. As shown in FIG. 9 , based on the design of the mask 100B, the optical glue 68 corresponding to the central region 102 will include a plurality of first curing portions SG1 and a plurality of second curing portions SG2 after curing. Each of the first solidified parts SG1 has a long trapezoidal column structure, and each of the second solidified parts SG2 has a triangular column structure. Wherein, the first cured portions SG1 and the second cured portions SG2 are arranged in a staggered manner along a first axis AX1 (long axis direction) of the display device 60 .

In this embodiment, the hardness of the first solidified portion SG1 is greater than that of the second solidified portion SG2. For example, the hardness of the first solidified part SG1 may be 15, and the hardness of the second solidified part SG2 may be 12, but not limited thereto. Since the hardness of the second solidified portion SG2 is relatively low (soft), when the display device 60 is bent around a second axis AX2 (short axis direction), as shown in FIG. 10, the second solidified portion SG2 can be squeezed. Press to make the optical glue 68 achieve a function similar to a hinge.

Based on the structural design of this embodiment, the possibility of wavy creases occurring at the bending region CR after the display device 60 is bent multiple times can be further reduced. It should be noted that, in this embodiment, the distance DS1 between the ultraviolet light source 56 and the mask 100B is more than five times the distance DS2 between the mask 100B and the display device 60 .

Please refer to FIG. 11 and FIG. 12. FIG. 11 is a schematic top view of a photomask 100C according to another embodiment of the present disclosure, and FIG. 12 is a schematic diagram of an optical glue 68 after irradiation according to another embodiment of the present disclosure. Stereoscopic diagram. In this embodiment, the central area 102 forms a plurality of graphic parts 107, each of the graphic parts 107 has a rectangular structure, and the graphic parts 107 are arranged in a matrix. Wherein, the light transmittance of these pattern parts 107 is greater than the light transmittance of the non-pattern part 109 . For example, the light transmittance of these graphic parts 107 may be equal to the light transmittance of the surrounding areas 104 and 106 .

As shown in FIG. 12, the optical adhesive 68 corresponding to the central region 102 includes a plurality of first curing portions SG1 and a second curing portion SG2 after curing, and these first curing portions SG1 correspond to the pattern portions 107. The shape is such that each of the first solidified parts SG1 has a trapezoidal columnar structure, and the hardness of the first solidified parts SG1 is greater than that of the second solidified parts SG2.

Based on the design of this embodiment, since the hardness of the second cured portion SG2 is relatively low (soft), the display device 60 can be bent along a first bending direction RX1 around the first axis AX1, or along a second bending direction RX1. The bending direction RX2 is bent around the second axis AX2. This design can make the display device 60 less prone to wavy creases after being bent many times.

Next, please refer to FIG. 13 , which is a flowchart of a manufacturing method S300 of a display device according to an embodiment of the present disclosure. In step S302 , a display device 60 is placed on the carrier platform 52 , so that the conveyor belt 58 sends the display device 60 into the chamber 54 . Next, in step S304 , a photomask is placed above the display device 60 . In some embodiments, the mask may include a central region 102 and peripheral regions 104 , 106 .

In step S306 , the photomask is aligned on the display device 60 , so that the projection of the central area 102 of the photomask on the display device 60 covers the bending region CR of the display device 60 . For example, a positioning mark can be set on the carrier platform 52 , and the photomask and the display device 60 are aligned with the positioning mark at the same time, so that the two are definitely aligned. For example, as shown in FIG. 2 , the mask 100 is indeed positioned on the display device 60 , so that the projection of the central area 102 covers the bending area CR.

Finally, in step S308 , an ultraviolet light source 56 is provided to emit an ultraviolet light 561 through the mask to the display device 60 to cure the optical glue 68 of the display device 60 . Wherein, the ultraviolet light 561 irradiates a front side 681 of the optical glue 68 . Since the light transmittance of the central region 102 is smaller than that of the peripheral regions 104 and 106 , the hardness of the optical glue corresponding to the peripheral regions 104 and 106 is greater than the hardness of the optical glue corresponding to the central region 102 .

Please refer to FIG. 14 to FIG. 16. FIG. 14 is a flowchart of a manufacturing method S400 of a display device according to another embodiment of the present disclosure, and FIG. A schematic diagram of the mask 100B irradiating the optical adhesive 68 , and FIG. 16 is a schematic diagram of the UV light source 56 irradiating the display device 60 through the mask 100B according to another embodiment of the present disclosure. Wherein, in step S402 , the ultraviolet light 561 is provided to pass through the mask 100B to irradiate a back side 683 of the optical glue 68 , and the optical glue 68 is not yet connected to the display module 64 at this time.

It should be noted that in step S402 , the irradiation time of the ultraviolet light 561 on the optical adhesive 68 is shorter than that of step S308 . For example, the irradiation time in step S402 is half of the irradiation time in step S308. Therefore, only the lower half 68D of the optical glue 68 forms a plurality of first cured portions SG1 and second cured portions SG2 , while the upper half 68U of the optical glue 68 is not cured.

Wherein, the height of the first curing portion SG1 is half of the thickness of the optical glue 68 . In addition, similarly, the hardness of the first curing portion SG1 is greater than the hardness of the second curing portion SG2.

Next, in step S404 , the display module 64 is connected to the cover plate 66 through the optical glue 68 . In step S406 , as shown in FIG. 1 , the display device 60 is placed on the carrier platform 52 , and the conveyor belt 58 is used to send the display device 60 into the chamber 54 . In step S408 , the photomask 100B is placed above the display device 60 .

In step S410 , align the mask 100B on the display device 60 , so that the projection of the central area 102 of the mask 100B on the display device 60 covers the bending region CR of the display device 60 .

Finally, in step S412 , the ultraviolet light source 56 is provided to emit ultraviolet light 561 through the mask 100B to the display device 60 to cure the optical adhesive 68 of the display device 60 . Wherein, the ultraviolet light 561 irradiates the front side 681 of the optical glue 68 . Therefore, as shown in FIG. 16 , similar to the lower half 68D, the upper half 68U of the optical glue 68 also forms the same number of first cured portions SG1 and second cured portions SG2 .

Please refer to FIG. 16 and FIG. 17 together. FIG. 17 is a perspective view of an optical adhesive 68 after curing according to another embodiment of the present disclosure. After the optical adhesive 68 is cured, as shown in FIG. 17, the first cured part SG1 of the optical adhesive 68 can form a hexagonal column extending along the second axis AX2, and a plurality of hexagonal columns are along the second axis. One axis is arranged in AX1.

Based on the design of this embodiment, since the hardness of the second cured portion SG2 is relatively low (soft), the display device 60 can be bent along the second bending direction RX2 around the second axis AX2, or along a third bend The bending direction RX3 is bent around the second axis AX2. This design not only enables the display device 60 to be bent in different directions, but also makes the display device 60 not prone to wavy creases after being bent several times.

To sum up, the present disclosure provides a photocuring device, including a carrier platform, a photomask, and an ultraviolet light source. The carrying platform is configured to carry a display device, the photomask is arranged above the display device, and the photomask includes a central area and a peripheral area. The ultraviolet light source is configured to emit ultraviolet light through the mask to the display device, so as to cure the optical glue.

Since the light transmittance of the central region 102 is smaller than that of the peripheral region, the hardness of the optical glue corresponding to the peripheral region is greater than the hardness of the optical glue corresponding to the central region 102 . Based on this design, when the display device is bent, the compressive stress in the central bending region can be reduced, thereby avoiding the problem of wavy creases caused by the stress concentration of the display device during bending.

Although the embodiments of the present disclosure and their advantages have been disclosed above, it should be understood that those skilled in the art can make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure. In addition, the protection scope of the present disclosure is not limited to the process, machine, manufacture, material composition, device, method and steps in the specific embodiments described in the specification, and anyone with ordinary knowledge in the technical field can learn from the content of the present disclosure It is understood that the current or future developed process, machine, manufacture, material composition, device, method and step can be used according to the present disclosure as long as it can perform substantially the same function or obtain substantially the same result in the embodiments described herein. Therefore, the protection scope of the present disclosure includes the above-mentioned process, machine, manufacture, composition of matter, device, method and steps. In addition, each patent application scope constitutes an individual embodiment, and the protection scope of the present disclosure also includes combinations of various patent application scopes and embodiments.

50: Light curing equipment 52: carrying platform 54: chamber 56: UV light source 561: Ultraviolet light 58: Conveyor belt 60: Display device 64: Display module 66: cover plate 68: optical glue 68D: lower half 68U: upper half 100, 100A, 100B, 100C: mask 102: Central area 104: Surrounding area 106: Surrounding area 107: Graphics Department 109: Non-graphic department 681: front side 682:Center rubber part 683: dorsal side 684: Peripheral rubber part 686: Peripheral rubber part AX1: the first axis AX2: the second axis CL0: curve CL1: curve CR: bending area D1: the first direction D2: Second direction DS1: distance DS2: Distance LX: Long axis direction RX1: the first bending direction RX2: Second bending direction RX3: The third bending direction SC0: Central sub-area SC1～SCN: side sub-area SFC: maximum compressive stress SG1: The first curing department SG2: Second Curing Department S300: method S302, S304, S306, S308: steps S400: Method S402, S404, S406, S408, S410, S412: steps X: X-axis Y: Y-axis Z: Z-axis

The present disclosure can be clearly understood through the following detailed descriptions and diagrams. It is emphasized that, in accordance with the standard practice in the industry, various features are not drawn to scale and are used for illustration purposes only. In fact, the dimensions of the various features may be arbitrarily expanded or reduced for clarity of illustration. FIG. 1 is a perspective view of a photocuring device 50 according to an embodiment of the present disclosure. FIG. 2 is a schematic diagram of a display device 60 disposed in a chamber 54 according to an embodiment of the present disclosure. FIG. 3 is a schematic diagram of bending a display device 60 according to an embodiment of the present disclosure. FIG. 4 is a graph showing the compressive stress distribution of the cured optical glue 68 when the display device 60 is bent according to an embodiment of the present disclosure. FIG. 5 is a top view of a photomask 100 according to an embodiment of the present disclosure. FIG. 6 is a schematic front view of a photomask 100A according to another embodiment of the present disclosure. FIG. 7 is a schematic top view of a photomask 100B according to another embodiment of the present disclosure. FIG. 8 is a schematic diagram of an ultraviolet light source 56 irradiating a display device 60 through a photomask 100B according to another embodiment of the present disclosure. FIG. 9 is a three-dimensional schematic diagram of the irradiated optical adhesive 68 according to another embodiment of the present disclosure. FIG. 10 is an enlarged schematic diagram of a display device 60 according to another embodiment of the disclosure when it is bent. FIG. 11 is a schematic top view of a photomask 100C according to another embodiment of the present disclosure. FIG. 12 is a three-dimensional schematic diagram of the irradiated optical adhesive 68 according to another embodiment of the present disclosure. FIG. 13 is a flowchart of a manufacturing method S300 of a display device according to an embodiment of the present disclosure. FIG. 14 is a flowchart of a manufacturing method S400 of a display device according to another embodiment of the present disclosure. FIG. 15 is a schematic diagram of an ultraviolet light source 56 irradiating an optical glue 68 through a mask 100B according to another embodiment of the present disclosure. FIG. 16 is a schematic diagram of an ultraviolet light source 56 irradiating a display device 60 through a photomask 100B according to another embodiment of the present disclosure. FIG. 17 is a perspective view of an optical adhesive 68 after curing according to another embodiment of the present disclosure.

56: UV light source

561: Ultraviolet light

60: Display device

64: Display module

66: cover plate

68: optical glue

100: mask

102: Central area

104: Surrounding area

106: Surrounding area

681: front side

682:Center rubber part

684: Peripheral rubber part

686: Peripheral rubber part

CR: bending area

LX: Long axis direction

X: X-axis

Y: Y-axis

Z: Z-axis

Claims (9)

A photomask, arranged above a display device, includes: a peripheral area; and a central area, wherein the central area forms a plurality of graphic parts, each of the graphic parts has a rectangular structure, along a first direction Extending, the pattern parts are arranged along a second direction, and the first direction is perpendicular to the second direction, wherein the light transmittance of the pattern parts is equal to the light transmittance of the peripheral area; wherein, the light The mask is configured to receive an ultraviolet light from an ultraviolet light source, and the ultraviolet light passes through the mask and irradiates the display device to cure an optical adhesive, wherein a display module of the display device is formed by the optical Glue is connected to a cover plate of the display device; wherein, the light transmittance of the central region is lower than that of the peripheral region, so that the hardness of the optical glue corresponding to the peripheral region is greater than that corresponding to the central region The hardness of the optical glue. The photomask according to claim 1, wherein the projection of the central region on the display device covers a bending region of the display device, the peripheral region and the central region are adjacent to each other, and the length of the central region is less than or equal to the photomask 15% of the total length. Such as the mask of claim item 2, wherein the central area includes a central sub-area and N side sub-areas, and the central sub-area and the first side sub-area of the N side sub-areas ~ Nth The light transmittances of the side sub-areas increase sequentially from the center of the mask towards the peripheral area, wherein N is a natural number. The photomask according to claim 3, wherein the first side sub-region to the Nth side sub-region are sequentially arranged from the center of the photomask toward the peripheral region. A method for manufacturing a display device, comprising: arranging a display device on a carrier platform; arranging a photomask above the display device, wherein the photomask includes a central area and a peripheral area; and providing an ultraviolet light source to emit an ultraviolet The light passes through the mask to the display device to cure an optical adhesive of the display device, wherein the ultraviolet light irradiates a front side of the optical adhesive; wherein the light transmittance of the central area is smaller than that of the peripheral area Light transmittance, so that the hardness of the optical glue corresponding to the peripheral area is greater than the hardness of the optical glue corresponding to the central area; wherein the central area forms a plurality of graphic parts, each of these graphic parts has A rectangular structure extending along a first direction, the graphic parts are arranged along a second direction, and the first direction is perpendicular to the second direction, wherein the light transmittance of the graphic parts is equal to that of the peripheral area Light penetration. The manufacturing method of the display device as claimed in claim 5, wherein the manufacturing method of the display device further comprises: connecting a display module of the display device to a cover plate of the display device by the optical glue; Before the optical adhesive connects the display module to the cover plate, the ultraviolet light is provided to pass through the mask to irradiate a back side of the optical adhesive. The method for manufacturing a display device according to claim 5, wherein the optical glue corresponding to the central region includes a plurality of first curing parts and a plurality of second curing parts after curing, each of the first curing parts It has a long trapezoidal column structure, and each of the second cured parts has a triangular column structure, wherein the hardness of the first cured part is greater than that of the second cured part. A method for manufacturing a display device, comprising: arranging a display device on a carrier platform; arranging a photomask above the display device, wherein the photomask includes a central area and a peripheral area; and providing an ultraviolet light source to emit an ultraviolet The light passes through the mask to the display device to cure an optical adhesive of the display device, wherein the ultraviolet light irradiates a front side of the optical adhesive; wherein the light transmittance of the central area is smaller than that of the peripheral area Light transmittance, so that the hardness of the optical glue corresponding to the peripheral area is greater than the hardness of the optical glue corresponding to the central area; wherein the central area forms a plurality of graphic parts, each of these graphic parts has It has a rectangular structure, and the pattern parts are arranged in a matrix, wherein the light transmittance of the pattern parts is equal to the light transmittance of the surrounding area. The manufacturing method of a display device according to claim 8, wherein the optical glue corresponding to the central area includes a plurality of first curing parts and a second curing part after curing, and the first curing parts correspond to the figures Each of the first solidified parts has a trapezoidal columnar structure, and the hardness of the first solidified parts is greater than that of the second solidified parts The hardness of the chemical part.

Images