TW201715361A - Touch sensing display apparatus - Google Patents

Abstract

A touch sensing display apparatus includes a display module, an optical clear adhesive layer, a light-blocking structure, a protective layer and a plurality of transparent colloidal layers. The optical clear adhesive layer is disposed over the display module. The light-blocking structure is disposed on a surface of the optical clear adhesive layer away from the display module. The protective layer is disposed on a surface of the light-blocking structure away from the optical clear adhesive layer, and conforms an accommodation space with the optical clear adhesive layer and the light-blocking structure. The transparent colloidal layers are disposed inside the accommodation space, at least one reflective index of the transparent colloidal layer is different from other transparent colloidal layers.

Description

Touch display device

The present invention relates to a touch display device, and more particularly to a touch display device having a plurality of transparent ink layers.

In general, the common touch display device is assembled by attaching a protective glass layer with a light-shielding ink on the edge to the display module or a combination of the touch module and the display module by using an optical adhesive layer. There is no other medium between the optical adhesive layer and the protective glass layer, so that the optical viewing angle of the touch display device can only adjust the refractive index of the optical adhesive layer and the protective glass layer material, which hinders the material properties. The refractive index of the material cannot be arbitrarily combined, there is no adjustment space, and the desired optical properties cannot be achieved, or even a special optical coating layer having a special property on the protective glass layer must be used. On the other hand, since the thickness of the optical adhesive layer must be adjusted according to the thickness of the light-shielding ink in the ink region on the protective glass layer, in addition to increasing the difficulty of the manufacturing process, if the optical adhesive layer and the thickness of the light-shielding ink cannot be matched, Time, easy to optical layer The visible area (VA) between the protective glass layers generates bubbles, which affect the visual effect of the touch display device.

It can be seen that the above existing architecture obviously has inconveniences and defects, and needs to be further improved. In order to solve the above problems, the relevant fields have not exhausted their efforts to seek solutions, but the methods that have not been applied for a long time have been developed. Therefore, how to effectively solve the above problems is one of the current important research and development topics, and it has become an urgent target for improvement in related fields.

A technical aspect of the present invention relates to a touch display device comprising a plurality of transparent colloid layers disposed in an accommodating space formed by an optical adhesive layer, a light shielding structure and a protective layer, by changing layers of the transparent colloid layer The refractive index achieves different optical effects, and provides a method of adjusting the viewing angle of the touch display device in addition to changing the refractive index of the optical adhesive layer or the protective layer material and using a special coating layer on the protective layer, and reducing the optical adhesive layer. And the limitation of the protective layer, and the phenomenon that the refractive index difference between the interfaces is too large and the partial reflection occurs between the interfaces during the interface can be avoided or reduced, and the luminous efficiency of the touch display device is reduced.

The invention provides a touch display device comprising a display module, an optical adhesive layer, a light shielding structure, a protective layer and a plurality of transparent colloid layers. The optical glue layer is disposed above the display module. The light shielding structure is disposed on the surface of the optical adhesive layer away from the display module. The protective layer is disposed on the surface of the light shielding structure away from the optical adhesive layer, and forms an accommodation space together with the optical adhesive layer and the light shielding structure. Multiple transparent colloid layers Placed in the accommodating space, the refractive index of at least one of the plurality of transparent colloid layers is different from the refractive index of other layers in the transparent colloid layer.

In one or more embodiments of the present invention, the display module has a visible area, and the transparent colloid layer covers at least an area on the optical adhesive layer that overlaps with a vertical projection of the visible area.

In one or more embodiments of the present invention, the refractive index of the optical adhesive layer is different from the refractive index of the protective layer, and the refractive index of the plurality of transparent colloid layers is between the refractive index of the optical adhesive layer and the protective layer. Between the refractive indices.

In one or more embodiments of the present invention, the refractive index of the optical adhesive layer is greater than the refractive index of the protective layer.

In one or more embodiments of the present invention, the light-transmitting colloid layer is sequentially laminated between the optical adhesive layer and the protective layer, and the refractive index of the transparent colloid layer adjacent to the optical adhesive layer in the transparent colloid layer is greater than the adjacent The refractive index of the light transmissive colloid layer of the protective layer.

In one or more embodiments of the present invention, the refractive index of the light-transmitting colloid layer is sequentially decreased from the optical adhesive layer toward the protective layer.

In one or more embodiments of the present invention, the refractive index of the optical adhesive layer is smaller than the refractive index of the protective layer.

In one or more embodiments of the present invention, the light-transmitting colloid layer is sequentially laminated between the optical adhesive layer and the protective layer, and the refractive index of the transparent colloid layer adjacent to the optical adhesive layer in the transparent colloid layer is less than the adjacent The refractive index of the light transmissive colloid layer of the protective layer.

In one or more embodiments of the present invention, the refractive index of the transparent colloid layer is sequentially increased from the optical adhesive layer toward the protective layer.

In one or more embodiments of the present invention, the light shielding structure includes a first portion and a second portion. The first portion has a first thickness. The second portion has a second thickness. The first thickness is greater than the second thickness, wherein the first extension of the light transmissive colloid layer extends between the second portion and the optical adhesive layer.

In one or more embodiments of the present invention, the thickness of the first extension portion is equal to the difference between the first thickness and the second thickness.

In one or more embodiments of the present invention, the second extended portion of the light transmissive colloid layer extends between the first portion and the optical adhesive layer.

In one or more embodiments of the present invention, the difference between the thickness of the first extension portion and the thickness of the second extension portion is equal to the difference between the first thickness and the second thickness.

In one or more embodiments of the present invention, the touch display device further includes a touch sensing film disposed between the optical adhesive layer and the display module.

In one or more embodiments of the present invention, the optical adhesive layer comprises a plurality of microstructures located in a region where the optical adhesive layer overlaps the vertical projection of the visible region.

In one or more embodiments of the present invention, at least the light-transmitting colloid layer adjacent to the optical adhesive layer in the light-transmitting colloid layer comprises a plurality of joint structures, and the joint structure and the microstructure are in conformity with each other.

100‧‧‧Touch display device

110‧‧‧ display module

120‧‧‧Optical adhesive layer

130‧‧‧ shading structure

140‧‧‧Translucent colloid layer

150‧‧‧protection layer

160‧‧‧Touch sensing film

200‧‧‧Touch display device

220‧‧‧ shading structure

240‧‧‧Transparent colloid layer

300‧‧‧Touch display device

320‧‧‧ shading structure

340‧‧‧Transparent colloid layer

400‧‧‧Touch display device

420A‧‧‧ first part

420B‧‧‧ Part II

440‧‧‧Translucent colloid layer

500‧‧‧Touch display device

520‧‧‧ shading structure

522‧‧‧Microstructure

540‧‧‧Transparent colloid layer

542‧‧‧ joint structure

BA‧‧‧ surrounding area

H1‧‧‧first thickness

H2‧‧‧second thickness

HD1‧‧‧ step difference

HD2‧‧‧ step difference

HD3‧‧‧ paragraph difference

N1~nk‧‧‧refractive index

VA‧‧ visible area

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. 1 to 4 are side cross-sectional views of a touch display device according to various embodiments of the present invention.

FIG. 5 is a side cross-sectional view of a touch display device according to another embodiment of the present invention.

Unless otherwise indicated, the same numbers and symbols in the different figures are generally regarded as the corresponding parts. The illustrations are drawn to clearly illustrate the relevant associations of the embodiments and not to depict the actual dimensions.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

When an element is referred to as "on", it can generally mean that the element is directly on the other element, or that other element is present in the two. Conversely, when an element is referred to as being "directly on" another element, it cannot be. As used herein, the term "and/or" encompasses any combination of one or more of the listed associated items.

1 is a side cross-sectional view of a touch display device 100 according to an embodiment of the invention. As shown in FIG. 1 , the touch display device 100 includes a display module 110 , an optical adhesive layer 120 , a light shielding structure 130 , a plurality of transparent colloid layers 140 , and a protective layer 150 . The display module 110 has a visible area VA and a periphery The area BA, wherein the viewable area VA is part of the display module 110 visible to the user, will be described in detail later. It should be noted that the visible area VA and the peripheral area BA are not shown in actual size, and may extend to other areas of the touch display device 100 in a vertical direction. In various embodiments, the edge region BA surrounds the viewable area VA. The optical adhesive layer 120 is disposed above the display module 110 for adhering the display module 110 and the protective layer 150. In various embodiments, the optical adhesive layer 120 can be a light transmissive colloid layer. In various embodiments, the optical adhesive layer 120 can be an optical clear adhesive (OCA), a liquid optical (clear adhesive, LOCA) or other suitable light transmissive material. In various embodiments, the upper surface and the lower surface of the optical adhesive layer 120 are parallel to the surface of the display module 110 near the optical adhesive layer 120. In other embodiments, the upper surface of the optical adhesive layer 120 is not parallel to the surface of the display module 110 near the optical adhesive layer 120, as will be described in detail later. The light shielding structure 130 is disposed on the upper surface of the optical adhesive layer 120 away from the display module 110. In various embodiments, the light blocking structure 130 can be an opaque printing ink. In various embodiments, the light shielding structure 130 can also be an insulating glue. In various embodiments, the light blocking structure 130 can be formed by one or more processes. The protective layer 150 is disposed on the surface of the light shielding structure 130 away from the optical adhesive layer 120, and forms an accommodation space together with the optical adhesive layer 120 and the light shielding structure 130. In various embodiments, the protective layer 150 can be tempered glass or other suitable material. A plurality of transparent colloid layers 140 are disposed in the accommodating space. In various embodiments, the light transmissive colloid layer 140 covers at least the area of the optical adhesive layer 120 that overlaps the vertical projection of the visible area VA. In various embodiments, each of the plurality of light transmissive colloid layers 140 has a refractive index from the light-sensitive colloid layer 140 near the optical adhesive layer 120 to the light transmission near the protective layer 150. The colloid layer 140 has a refractive index sequentially expressed as n1, n2, n3.....nk, and the refractive index described herein is an absolute refractive index with respect to a vacuum, rather than a relative refractive index. The refractive index of at least one of the transparent colloid layers 140 is different from the refractive indices of other layers in the transparent colloid layer 140. In various embodiments, a plurality of light transmissive colloid layers 140 are sequentially laminated between the optical adhesive layer 120 and the protective layer 150. In various embodiments, the light transmissive colloid layer 140 can be a clear solvent or coating.

It should be noted that the difference between the "visible area VA" and the "peripheral area BA" in the present disclosure is that the user can see the part of the display module 110 through the middle structure from the direction of the protective layer 150, that is, Referring to the visible area VA, after the visible area VA is removed, the remaining part of the display module 110 is the peripheral area BA. In other words, from the direction of the protective layer 150, the portion formed by the light shielding structure 130 and the transparent colloid layer 140 between the protective layer 150 and the optical adhesive layer 140 may be first formed, wherein the peripheral region BA may contain light. The portion of the light-shielding structure 130 that is shielded is limited by the angle and the optical properties of the material so that it cannot be imaged on the protective layer 150, and the remaining portion of the display module 110 is the visible area VA.

Since the touch display device 100 is provided with a plurality of transparent colloid layers 140 between the optical adhesive layer 120 on the visible region VA and the protective layer 150, the plurality of transparent colloid layers 140 can adjust the refractive index of each layer according to requirements. After the light emitted by the display module 110 enters the transparent colloid layer 140, the optical effects of different targets can be achieved according to the different optical properties of the transparent colloid layer 140. For example, in various embodiments, after the light enters the transparent colloid layer 140 from the display module 110, the range of the light cone dispersed by the light is more concentrated than before the transparent colloid layer 140 is used, so that the unit area is The illuminance is increased. In other multiples In the embodiment, after the light enters the transparent colloid layer 140 from the display module 110, the range of the light cone dispersed by the light is more dispersed than before the transparent colloid layer 140 is used, so that the touch display device 100 has a wider viewing angle. That is, through the arrangement of the transparent colloid layer 140, the touch display device 100 can be adjusted in addition to changing the refractive index of the optical adhesive layer 120 or the protective layer 150 and applying a special coating layer on the protective layer 150. The viewing angle reduces the restrictions on the optical adhesive layer 120 and the protective layer 150, and the relatively expensive coating process can be omitted.

In addition, the light-transmitting colloid layer 140 is disposed at least in a region overlapping the vertical projection of the visible region VA between the optical adhesive layer 120 and the protective layer 150, and the transparent colloid layer 140 can fill the gap in the visible region VA to avoid the visible region VA. The gas is retained, thereby reducing the optical adhesive layer 120 in the process of bonding the light-shielding structure 130, generating bubbles, and affecting the visual effect of the touch display device 100. At the same time, after the transparent colloid layer 140 is used, the thickness of the optical adhesive layer 120 no longer needs to be adjusted to match the thickness of the light shielding structure 130, which reduces the difficulty of the manufacturing process, or even in various embodiments, even if the height of the light shielding structure 130 is high. Inconsistent, the level of the contact surface of the optical adhesive layer can be adjusted by providing the transparent colloid layer 140, and the height difference of the light-shielding structure 130 can be avoided or reduced, and the height difference can be generated, such as water ripple. The phenomenon that the display module 110 emits a visual effect of the image will be destroyed, as will be described in detail later.

In various embodiments, the refractive index of the optical adhesive layer 120 is different from the refractive index of the protective layer 150, and the refractive indices n1, n2, n3..... nk of the transparent colloid layer 140 are interposed between the optical adhesive layer 120. The refractive index is between the refractive index of the protective layer 150. As a result, the touch display device 100 can gradually illuminate the light emitted by the display module 110 to the preset optical path through the transparent colloid layer 140. The optical effect of the same target, and because the optical path is asymptotically adjusted in the direction of the light-transmitting colloid layer 140, the transparent colloid layer 140 can also preferably avoid or reduce the material of different refractive indices between the interfaces. The phenomenon that the refractive index is excessively large and the partial reflection occurs between the interfaces, the luminous efficiency of the touch display device 100 is lowered.

In various embodiments, the refractive index of the optical adhesive layer 120 may be greater than the refractive index of the protective layer 150, such that after the light enters the optical adhesive layer 120 from the display module 110 and passes through the transparent colloid layer 140 and the protective layer 150, the light The direction of the launch will be more divergent. That is, the range of the light cone dispersed by the light leaving the protective layer 150 is more divergent than that of the optical adhesive layer 120, so that the user can receive the image emitted from the touch display device 100 on a larger angle extension line. The touch display device 100 is provided with a wider viewing angle. In various embodiments, the light transmissive colloid layer 140 adjacent to the optical adhesive layer 120 in the light transmissive colloid layer 140 has a refractive index greater than that of the transparent colloid layer 140 adjacent to the protective layer 150. In various embodiments, the refractive index of the transparent colloid layer 140 decreases sequentially from the transparent colloid layer 140 adjacent to the optical adhesive layer 120 toward the transparent colloid layer 140 adjacent to the protective layer 150. In other words, the refractive index between the layers of the transparent colloid layer 140 will exhibit a relationship of n1≧n2≧n3≧.....≧nk, and the refractive index of at least one or more of the transparent colloid layers 140 and others The light transmissive colloid layer 140 is different. The light emitted by the display module 110 is progressively turned to a relatively divergent light-emitting area by the transparent colloid layer 140. It is better to avoid or reduce the difference in refractive index between the interfaces of the materials having different refractive indices. The phenomenon of partial reflection occurs between the interfaces, and the luminous efficiency of the touch display device 100 is lowered.

FIG. 2 is a side cross-sectional view showing the touch display device 200 according to another embodiment of the present invention. Referring to FIG. 2, the touch display device 200 is A light shielding structure 220 and a plurality of transparent colloid layers 240 are disposed between the optical adhesive layer 120 and the protective layer 150. A portion of the light-shielding structure 220 and the protective layer 150 have a step difference HD1, and one or more transparent colloid layers 240 of the plurality of transparent colloid layers 240 extend into the accommodating space of the step HD1 portion to fill the portion of the step HD1. In the space, the gas is prevented from remaining in the accommodating space, and bubbles are generated in the manufacturing process of attaching the optical adhesive layer 120, thereby affecting the visual effect of the touch display device 200. In other words, in various embodiments, the accommodating space has a smaller area than the plane of the accommodating space close to the protective layer 150. In various embodiments, the refractive index of the optical adhesive layer 120 in the touch display device 200 may be greater than the refractive index of the protective layer 150 such that the light exiting the optical adhesive layer 120 passes through the transparent colloid layer 240 and the protective layer 150. The divergence direction of the light is more divergent, so that the actual display area of the visible area VA on the protective layer 150 is increased, and a wider viewing angle of the touch display device 200 is provided. In various embodiments, the light transmissive colloid layer 240 adjacent to the optical adhesive layer 120 in the light transmissive colloid layer 240 has a refractive index greater than that of the transparent colloid layer 240 adjacent to the protective layer 150. In various embodiments, the refractive index of the light transmissive colloid layer 240 decreases sequentially from the optical adhesive layer 120 toward the protective layer 150.

Referring to FIG. 1 , in various embodiments, the refractive index of the optical adhesive layer 120 may be smaller than the refractive index of the protective layer 150 such that light enters the optical adhesive layer 120 from the display module 110 and passes through the transparent colloid layer 140 and the protective layer. After 150, the direction of light emission will be more concentrated. That is, the range of light cones scattered by the light leaving the protective layer 150 is more concentrated than that of the optical adhesive layer 120, increasing the illuminance per unit area. In various embodiments, the transparent colloid layer 140 adjacent to the protective layer 150 in the transparent colloid layer 140 has a refractive index greater than that of the adjacent optical adhesive layer 120. The refractive index of the colloid layer 140. In various embodiments, the refractive index of the light transmissive colloid layer 140 decreases sequentially from the light transmissive colloid layer 140 adjoining the protective layer 150 toward the light transmissive colloid layer 140 adjacent to the optical adhesive layer 120. In other words, the refractive index between the layers of the transparent colloid layer 140 will exhibit a relationship of n1≦n2≦n3≦.....≦nk, and the refractive index of at least one or more of the transparent colloid layers 140 and others The light transmissive colloid layer 140 is different. By gradually transmitting the light emitted by the display module 110 to the relatively concentrated light-emitting area by the transparent colloid layer 140, it is better to avoid or reduce the difference in refractive index between the interfaces of different refractive index materials. The phenomenon of partial reflection occurs between the interfaces, and the luminous efficiency of the touch display device 100 is lowered.

FIG. 3 is a side cross-sectional view showing the touch display device 300 according to another embodiment of the present invention. Referring to FIG. 3 , the touch display device 300 is provided with a light shielding structure 320 and a plurality of transparent colloid layers 340 between the optical adhesive layer 120 and the protective layer 150 . A portion of the light-shielding structure 320 and the optical adhesive layer 120 have a step difference HD2, and one or more transparent colloid layers 340 of the plurality of transparent colloid layers 340 extend into the accommodating space of the step HD2 portion to fill the capacity of the step HD2 portion. The space is formed to prevent gas from remaining in the accommodating space, and bubbles are generated in the manufacturing process of attaching the optical adhesive layer 120, thereby affecting the visual effect of the touch display device 300. In other words, in various embodiments, the accommodating space has a larger area than the plane of the accommodating space close to the protective layer 150 in a plane close to the optical adhesive layer 120. In various embodiments, the refractive index of the optical adhesive layer 120 in the touch display device 300 may be smaller than the refractive index of the protective layer 150, so that the light leaving the optical adhesive layer 120 passes through the transparent colloid layer 340 and the protective layer 150. The divergence direction of the light is concentrated, so that the touch display device 300 can further increase the visible area VA of the display device 110 on the optical adhesive layer 120. The light area increases the illuminance of the image displayed by the touch display device 300. In various embodiments, the light transmissive colloid layer 340 adjacent to the optical adhesive layer 120 in the light transmissive colloid layer 340 has a refractive index smaller than that of the transparent colloid layer 340 adjacent to the protective layer 150. In various embodiments, the refractive index of the light transmissive colloid layer 340 is sequentially increased from the optical adhesive layer 120 toward the protective layer 150.

In various embodiments, a plurality of light transmissive colloid layers 140 are located on portions of the optical adhesive layer 120 that overlap the vertical projection of the viewable area VA, the upper surface of each of the light transmissive colloid layers 140 and the lower side opposite the upper surface. The surface and the surface of the display module 110 adjacent to the optical adhesive layer 120 are parallel to each other. It should be understood that the above-mentioned embodiment of the transparent colloid layer 140 is merely illustrative and not intended to limit the present invention. Those having ordinary knowledge in the technical field of the present invention should flexibly select the transparent colloid layer according to actual needs. The aspect of 140 is as long as the light emitted from the display module 110 is allowed to travel according to a preset path and away from the surface of the protective module 150 away from the display module.

FIG. 4 is a side cross-sectional view showing the touch display device 400 according to another embodiment of the present invention. Referring to FIG. 4, in various embodiments, a light shielding structure 420 and a light transmissive colloid layer 440 are disposed between the protective layer 150 and the optical adhesive layer 120. The light shielding structure 420 can include a first portion 420A and a second portion 420B. The first portion 420A has a first thickness h1 that is a distance from a surface of the first portion 420A away from the protective layer 150 from a surface of the protective layer 150 near the light shielding structure 420. Similarly, the second portion 420B has a second thickness h2 that is a distance from the surface of the second portion 420B away from the protective layer 150 from the surface of the protective layer 150 near the light shielding structure 420. In various embodiments, the first thickness h1 is greater than the second thickness h2. In various embodiments, the first There is a step difference HD3 between the two portions 420B and the optical adhesive layer. In various embodiments, the first extension of the light transmissive colloid layer 440 can extend between the second portion 420B and the optical glue layer 120. In various embodiments, the thickness of the first extension portion is equal to the difference between the first thickness h1 and the second thickness h2. That is, a portion of the transparent colloid layer is disposed between the second portion 420B and the optical adhesive layer 120 to fill the step difference HD3, which can be avoided or reduced due to uneven thickness, such as water ripple, which may damage the display. The module 110 emits a visual effect of the image. It should be understood that this is not intended to limit the present invention. The light shielding structure 420 may have other different portions, and have different thicknesses relative to the surface of the protective layer 150 near the light shielding structure 420, respectively, by using a transparent colloid layer. A portion of the 440 extends between at least a portion of the light-shielding structure 420 and the optical adhesive layer 120 to fill a light-shielding structure of the light-shielding structure 420 that is smaller than the maximum thickness, such as a gap between the second portion 420B and the optical adhesive layer 120. Avoid or reduce uneven thickness.

In various embodiments, even the second extended portion of the light transmissive colloid layer 440 may extend between the first portion 420A and the optical adhesive layer 120. In various embodiments, the thickness of the first extension portion and the thickness of the second extension portion have a difference equal to the difference between the first thickness and the second thickness. That is, the light-shielding structure 420 and the other transparent colloid layer 440 are covered by the one or more transparent colloid layers 440 adjacent to the optical adhesive layer 120 to form a surface to be bonded to the optical adhesive layer 120, so that Ensure consistency in thickness. In various embodiments, the surface of the protective layer 150 adjacent to the display module 110 and the surface of the display module 110 adjacent to the protective layer 150 are parallel to each other, thereby avoiding or reducing uneven thickness. Raw, such as water ripples, can destroy the visual effect of the image displayed by the display module 110.

In various embodiments, the touch display device 100 further includes a touch sensing film 160 disposed between the optical adhesive layer 120 and the display module 110 for sensing a control gesture of the user. In various embodiments, the touch sensitive film 160 can be an Indium Tin Oxide (ITO) film. In various embodiments, the touch-sensitive film 160 can be a metal mesh. In various embodiments, the material of the touch sensing film 160 may be indium tin oxide, silver or other suitable materials.

FIG. 5 is a side cross-sectional view showing the touch display device 500 according to another embodiment of the present invention. As shown in FIG. 5 , the touch display device 500 includes a display module 110 , an optical adhesive layer 520 , a light shielding structure 130 , a plurality of transparent colloid layers 540 , and a protective layer 150 . The optical adhesive layer 520 is disposed above the display module 110 for adhering the display module 110 and the protective layer 150. In various embodiments, the optical adhesive layer 520 can be a light transmissive colloid layer. In various embodiments, the optical adhesive layer 520 can be an optical (clear adhesive) (OCA), a liquid optical (clear adhesive, LOCA) or other suitable light transmissive material. The optical adhesive layer 520 includes a plurality of microstructures 522 located in a region where the optical adhesive layer 520 overlaps the vertical projection of the visible region VA. In various embodiments, the plurality of microstructures 522 can be formed by rolling or other suitable process before the optical adhesive layer 520 is uncured. In various embodiments, the optical adhesive layer 520 can be cured by UV curing, natural cooling, or other suitable curing means. In various embodiments, the microstructures 522 can be tapered, curved, or other suitable shape. However, this does not limit the shape of the microstructure 522 in the present invention, in fact, micro Structure 522 can achieve optical effects of different targets as long as it allows light to travel along the desired path. The light shielding structure 130 is disposed on the surface of the optical adhesive layer 520 away from the display module 110, and forms an accommodation space together with the optical adhesive layer 520 and the protective layer 150. In various embodiments, each of the plurality of light transmissive colloid layers 540 has a refractive index, and the refractive index of at least one of the light transmissive colloid layers 540 is different from the other layers in the light transmissive colloid layer 540. In various embodiments, at least a plurality of light-transmitting colloid layers 540 adjacent to the optical adhesive layer 520 of the plurality of light-transmitting colloid layers 540 include a plurality of bonding structures 542, and the bonding structures 542 and the microstructures 522 are in engagement with each other.

Since the optical adhesive layer 520 of the touch display device 500 is disposed with the microstructure 522 on the visible region VA, and a plurality of transparent colloid layers 540 are disposed between the optical adhesive layer 520 and the protective layer 150, the microstructure 522 can be combined with the visual requirement. The plurality of transparent colloid layers 540 are adjusted to adjust the refractive index of each layer, so that the light emitted by the display module 110 can enter the transparent colloid layer 540 after leaving the optical adhesive layer 520, and can have different optical properties. Optical effects to different targets. For example, in various embodiments, after the light enters the transparent colloid layer 540 from the optical adhesive layer 520, the range of the light cone dispersed by the light is more concentrated than before the unused microstructure 522 and the transparent colloid layer 540, so that The illuminance and luminance per unit area increase. In other embodiments, after the light enters the transparent colloid layer 540 from the optical adhesive layer 520, the range of the light cone dispersed by the light is more dispersed than before the transparent colloid layer 540 is used, so that the touch display device 500 has A broader perspective. That is, through the arrangement of the microstructure 522 and the transparent colloid layer 540, it is possible to provide a mode other than modifying the refractive index of the optical adhesive layer 520 itself or the protective layer 150 and applying a special coating on the protective layer 150. The viewing angle of the display device 500 is controlled.

In various embodiments, the refractive index of the optical adhesive layer 520 is different from the refractive index of the protective layer 150, and the refractive index n1, n2, n3..... nk of the transparent colloid layer 540 is between the optical adhesive layer 520. The refractive index is between the refractive index of the protective layer 150. In this manner, the touch display device 500 can gradually illuminate the light emitted by the display module 110 to the preset optical path through the microstructure 522 and the transparent colloid layer 540 to achieve optical effects of different targets, and The direction of the light travel is asymptotically adjusted in the transparent colloid layer 540. The transparent colloid layer 540 can also preferably avoid or reduce the difference in refractive index between the interfaces of different refractive index materials. The phenomenon of partial reflection occurs between the intersections, and the luminous efficiency of the touch display device 100 is lowered.

In various embodiments, the refractive index of the optical adhesive layer 520 may be greater than the refractive index of the protective layer 150 such that light enters the optical adhesive layer 520 from the display module 110 and passes through the transparent colloid layer 540 and the protective layer 150. The direction of the launch will be more divergent. That is, the range of the light cone dispersed by the light leaving the protective layer 150 is more divergent than that of the optical adhesive layer 520, so that the user can receive the image emitted from the touch display device 500 on a larger angle extension line. The touch display device 500 is provided to have a wider viewing angle. In various embodiments, the light transmissive colloid layer 540 adjacent to the optical adhesive layer 520 in the light transmissive colloid layer 540 has a refractive index greater than that of the transparent colloid layer 540 adjacent to the protective layer 150. In various embodiments, the refractive index of the light transmissive colloid layer 540 decreases sequentially from the light transmissive colloid layer 540 adjoining the optical adhesive layer 520 toward the light transmissive colloid layer 540 adjoining the protective layer 150. In other words, the refractive index between the layers of the light-transmitting colloid layer 540 will exhibit a relationship of n1≧n2≧n3≧.....≧nk, and the refractive index of at least one or more of the light-transmitting colloid layers 540 and others The light transmissive colloid layer 540 is different. Displayed by the transparent colloid layer 540 The light emitted by the display module 110 is gradually turned to a relatively divergent light-emitting area, and it is preferable to avoid or reduce the difference in refractive index between the interfaces of different refractive indices due to excessive refractive index between the interfaces, and partial reflection between the interfaces. The phenomenon reduces the luminous efficiency of the touch display device 100.

In various embodiments, the refractive index of the optical adhesive layer 520 can be smaller than the refractive index of the protective layer 150 such that light enters the optical adhesive layer 520 from the display module 110 and passes through the microstructure 522, the transparent colloid layer 540, and the protective layer 150. After that, the light emission direction will be more concentrated. That is, the range of the light cone dispersed by the light leaving the protective layer 150 is more concentrated than that of the optical adhesive layer 520, and the illuminance and luminance per unit area are increased. In various embodiments, the light transmissive colloid layer 540 adjacent to the protective layer 150 in the light transmissive colloid layer 540 has a refractive index greater than that of the light transmissive colloid layer 540 adjacent to the optical adhesive layer 520. In various embodiments, the refractive index of the light transmissive colloid layer 540 decreases sequentially from the light transmissive colloid layer 540 adjoining the protective layer 150 toward the light transmissive colloid layer 540 adjacent to the optical adhesive layer 520. In other words, the refractive index between the layers of the light-transmitting colloid layer 540 will exhibit a relationship of n1≦n2≦n3≦.....≦nk, and the refractive index of at least one or more of the light-transmitting colloid layers 540 and others The light transmissive colloid layer 540 is different. The light emitted by the display module 110 is progressively turned to a relatively concentrated light-emitting area by the transparent colloid layer 540, so that it is better to avoid or reduce the difference in refractive index between the interfaces of different refractive index materials. The phenomenon of partial reflection occurs between the interfaces, and the luminous efficiency of the touch display device 100 is lowered.

In summary, the present invention provides a touch display device comprising a plurality of transparent colloid layers disposed in an accommodating space formed by an optical adhesive layer, a light shielding structure, and a protective layer, by changing the refraction of each layer of the transparent colloid layer. Rate does not reach The same optical effect provides a way to adjust the viewing angle of the touch display device in addition to changing the refractive index of the optical adhesive layer or the protective layer material and using a special coating layer on the protective layer, thereby reducing the limitation on the optical adhesive layer and the protective layer. Moreover, the phenomenon that the refractive index of the material with different refractive indexes is excessively large due to the difference in refractive index between the interfaces and the partial reflection between the interfaces is avoided, and the luminous efficiency of the touch display device is reduced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Touch display device

110‧‧‧ display module

120‧‧‧Optical adhesive layer

130‧‧‧ shading structure

140‧‧‧Translucent colloid layer

150‧‧‧protection layer

160‧‧‧Touch sensing film

BA‧‧‧ surrounding area

N1~nk‧‧‧refractive index

VA‧‧ visible area

Claims (16)

A touch display device includes: a display module; an optical adhesive layer disposed above the display module; a light shielding structure disposed on a surface of the optical adhesive layer away from the display module; a protective layer, The light-shielding structure is disposed away from a surface of the optical adhesive layer, and forms an accommodating space together with the optical adhesive layer and the light-shielding structure; and a plurality of transparent colloid layers disposed in the accommodating space, the light-transmitting The refractive index of at least one of the layers of the colloidal layer is different from the refractive index of the other layers of the transparent colloidal layer. The touch display device of claim 1, wherein the display module has a visible area, and the transparent colloid layer covers at least an area of the optical adhesive layer that overlaps with a vertical projection of the visible area. The touch display device of claim 1, wherein the refractive index of the optical adhesive layer is different from the refractive index of the protective layer, and the refractive index of the transparent colloid layer is between the optical adhesive layer The refractive index is between the refractive index of the protective layer. The touch display device of claim 3, wherein the optical adhesive layer has a refractive index greater than a refractive index of the protective layer. The touch display device of claim 4, wherein the light-transmitting colloid layers are sequentially laminated between the optical adhesive layer and the protective layer, and the optical adhesive layer is adjacent to the optical adhesive layer. The transparent colloid layer has a refractive index greater than a refractive index of the transparent colloid layer adjacent to the protective layer. The touch display device of claim 5, wherein the refractive index of the light-transmitting colloid layers decreases sequentially from the optical adhesive layer toward the protective layer. The touch display device of claim 3, wherein the optical adhesive layer has a refractive index smaller than a refractive index of the protective layer. The touch display device of claim 7, wherein the light-transmitting colloid layers are sequentially laminated between the optical adhesive layer and the protective layer, and the optical adhesive layer is adjacent to the optical adhesive layer. The refractive index of the light transmissive colloid layer is smaller than the refractive index of the light transmissive colloid layer adjacent to the protective layer. The touch display device of claim 8, wherein the refractive index of the light-transmitting colloid layers is sequentially increased from the optical adhesive layer toward the protective layer. The touch display device of claim 1, wherein the light shielding structure comprises: a first portion having a first thickness; a second portion having a second thickness, the first thickness being greater than the second thickness, wherein a first extension of the light transmissive colloid layers extends between the second portion and the optical adhesive layer. The touch display device of claim 10, wherein a thickness of the first extension portion is equal to a difference between the first thickness and the second thickness. The touch display device of claim 10, wherein a second extension portion of the light transmissive colloid layer extends between the first portion and the optical adhesive layer. The touch display device of claim 12, wherein the thickness of the first extending portion and the thickness of the second extending portion have a difference between the first thickness and the second thickness The values are equal. The touch display device of claim 1, further comprising a touch sensing film disposed between the optical adhesive layer and the display module. The touch display device of claim 1, wherein the optical adhesive layer comprises a plurality of microstructures located in an area where the optical adhesive layer overlaps the vertical projection of the visible region. The touch display device of claim 15 , wherein the light-transmitting colloid layer adjacent to the optical adhesive layer of the light-transmitting colloid layer comprises a plurality of bonding structures, the bonding structures and the microstructures Match each other.