TWM517363U - Touching-sensitive polarization structure and touching-sensitive display device - Google Patents

Abstract

This invention provides a touching-sensitive polarization structure which comprises a first substrate, a second substrate, a polarizing layer and at least one touching-sensitive layer. The first substrate is apart from the second substrate. The polarizing layer is disposed between the first substrate and the second substrate. The polarizing layer permits light having a first linear polarizing direction passing through, and blocks light having a second linear polarizing direction perpendicular to the first linear polarizing direction. The touching-sensitive layer is disposed on the first substrate or the second substrate.

Description

Touch polarized structure and touch display device

The present invention relates to a touch polarizing structure and a touch display device, and more particularly to a touch polarizing structure and a touch display device having a slim design.

A general touch-type liquid crystal display usually includes a touch module, a liquid crystal module, and a backlight module. The liquid crystal module comprises a structure of a polarizer, a color filter, a liquid crystal layer, a thin film transistor layer and a lower polarizer, and the touch module is disposed on the surface of the liquid crystal module, when the user touches the surface thereof. Generate an inductive signal. In the prior art, the touch module and the liquid crystal module are usually fabricated separately and then assembled and attached. However, the manufacturing method makes the touch liquid crystal display thicker, which is not conducive to the overall thin and light development.

Therefore, one of the objects of the present invention is to provide a touch polarizing structure having a slim design.

Therefore, the touch polarizing structure of the present invention comprises a first base a second substrate, a polarizing layer, an adhesive layer and at least one touch sensing layer. The first substrate and the second substrate are spaced apart from each other. a polarizing layer is disposed between the first substrate and the second substrate, which allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction, the first linear polarization direction The second linear polarization direction is perpendicular to each other. The touch sensing layer is disposed on the first substrate or the second substrate.

In some implementations, the touch sensing layer is two layers, and the touch sensing layers are respectively disposed on opposite sides of the first substrate or the second substrate.

In some embodiments, the touch polarizing structure further includes a protective layer disposed on the first substrate and located on opposite sides of the first substrate from the polarizing layer.

In some embodiments, the touch polarizing structure further includes an adhesive layer, and the adhesive layer and the polarizing layer are respectively located on opposite sides of the second substrate.

In some embodiments, the touch polarizing structure further includes a release layer attached to the adhesive layer, and the touch sensing layer is located on opposite sides of the adhesive layer.

In some implementations, a portion of the surface of the touch sensing layer is not covered by the first substrate, the second substrate, or the polarizing layer, and the touch polarizing structure further includes a circuit board disposed on the circuit board An uncovered surface of the touch sensing layer is electrically connected to the touch sensing layer.

In some implementations, part of the surface of the touch sensing layer is not covered by the first substrate, the second substrate, or the polarizing layer, and the The touch-sensitive structure further includes two circuit boards respectively disposed on the uncovered surfaces of the touch sensing layers and electrically connected to the touch sensing layers.

In some embodiments, the second substrate is a half wave plate and has a fast axis that is at a 45 degree angle to the first linear polarization direction; the touch sensing layer is disposed on the second substrate And the polarizing layer are respectively located on opposite sides of the second substrate.

In some embodiments, the second substrate is a quarter-wave plate and has a fast axis that is at a 45-degree angle to the first linear polarization direction; the touch sensing layer is disposed on the second substrate And the polarizing layer are respectively located on opposite sides of the second substrate.

Another touch-sensitive polarizing structure of the present invention comprises a first substrate, a second substrate, a polarizing layer, an optical compensation layer and a touch sensing layer. The first substrate and the second substrate are spaced apart from each other. a polarizing layer is disposed between the first substrate and the second substrate, which allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction, the first linear polarization direction The second linear polarization direction is perpendicular to each other. The optical compensation layer and the polarizing layer are respectively located on opposite sides of the second substrate. The touch sensing layer is disposed on the optical compensation layer, and is disposed on opposite sides of the optical compensation layer from the polarizing layer.

In some embodiments, the optical compensation layer is a half wave plate and has a fast axis that is at a 45 degree angle to the first linear polarization direction.

In some embodiments, the optical compensation layer is a quarter-wave plate and has a fast axis that is at a 45 degree angle to the first linear polarization direction.

On the other hand, the touch display device of the present invention comprises a liquid crystal module, a touch polarizing structure and a polarizer, and the polarizer is disposed on the liquid crystal module and is respectively located with the touch polarizing structure. On opposite sides of the liquid crystal module, the polarizer allows light having the second linear polarization direction to penetrate and block light having the first linear polarization direction.

The function of the novel is that the touch polarizing structure can share the first substrate or the second substrate by the touch sensing layer and the polarizing layer, thereby realizing the slimming of the touch polarizing structure and the touch display device. Through the arrangement of the circuit board, the touch polarization structure can be provided as a further configuration manner of the touch sensing structure. In addition, whether the second substrate is implemented by a half-wave plate or a quarter-wave plate, or the touch-biased structure is provided with an optical compensation layer, the anti-reflection and the elimination of the etching marks can be provided.

1‧‧‧Touch display device

2‧‧‧Touch polarized structure

21‧‧‧Protective layer

22‧‧‧First substrate

23‧‧‧ polarizing layer

24‧‧‧Second substrate

24'‧‧‧Second substrate

25‧‧‧ touch sensing layer

26‧‧‧Adhesive layer

27‧‧‧ release layer

28‧‧‧Touch sensing layer

29‧‧‧Second Adhesive Layer

3‧‧‧LCD Module

4‧‧‧ polarizer

5‧‧‧Circuit board

5’‧‧‧ boards

51‧‧‧ circuit board

51'‧‧‧ circuit board

52‧‧‧Wire

52’‧‧‧Wire

53‧‧‧Conductive adhesive

53'‧‧‧ conductive adhesive

6‧‧‧Optical compensation layer

Other features and advantages of the present invention will be apparent from the detailed description of the embodiments of the present invention. FIG. 1 is a schematic diagram illustrating an embodiment of the present touch display device; FIG. 2 is a schematic view illustrating The first embodiment of the present invention relates to a first embodiment of the present invention; FIG. 3 and FIG. 4 are schematic diagrams showing a variation of the touch polarization structure in the first embodiment; FIG. 5 is a schematic diagram showing the second implementation of the novel touch polarization structure. 6 and FIG. 7 are modified embodiments of the touch polarization structure in the second embodiment; FIG. 8 is a schematic view showing a third embodiment of the touch-control polarizing structure; FIG. 9 is a schematic view showing an embodiment of the touch-polarizing structure in the third embodiment; FIG. In another embodiment, another embodiment of the touch polarizing structure; and FIG. 11 is a schematic view illustrating a fourth embodiment of the novel touch polarizing structure.

The present invention will be described in detail below with reference to the accompanying drawings and the four embodiments.

It is to be noted that the orientations "upper", "lower", "top", and "bottom" as used in the detailed description of the present embodiments are merely used to indicate relative positional relationships. In the drawings of the present specification, the upper or top side is closer to the user, and the lower or bottom side is closer to the user, but the description of the orientation is not intended to limit the embodiments of the present invention.

First embodiment

Referring to FIG. 1 and FIG. 2 , the touch display device 1 includes a touch polarizing structure 2 , a liquid crystal module 3 , and a polarizer 4 . The touch polarizing structure 2 is an integrated structure combining a touch function and an upper polarizer. The liquid crystal module 3 includes a color filter, a liquid crystal layer, a thin film transistor layer and the like, and a polarizer. 4 is used as a lower polarizer of the touch display device 1.

The touch structure 2 includes a protective layer 21, a first substrate 22, a polarizing layer 23, a second substrate 24, and a touch sensing layer 25 as an integrated structure of the touch function and the upper polarizer. An adhesive layer 26 and a release layer 27.

The protective layer 21 is disposed on the first substrate 22 and opposite to the polarizing layer 23 on the opposite sides of the first substrate 22, and provides a surface protection function of the touch polarizing structure 2. In the present embodiment, the protective layer 21 is made of a material such as cerium oxide or acryl resin, but is not limited to such materials. In addition, if the first substrate 22 itself has sufficient structural strength, the touch polarizing structure 2 may also omit the arrangement of the protective layer 21, and is not limited to the specific embodiment.

The first substrate 22 and the second substrate 24 are spaced apart from each other, and the polarizing layer 23 is interposed therebetween, thereby providing a protective function to the polarizing layer 23 and limiting the degree of shrinkage and deformation of the polarizing layer 23 to ensure the polarizing layer. 23 can maintain stable optical characteristics. In this embodiment, the first substrate 22 and the second substrate 24 are flexible films made of triacetate cellulose (TAC), which can be used in the process of manufacturing the polarizing layer 23. As a carrier substrate. However, in different embodiments, the first substrate 22 and the second substrate 24 may also be made of different materials, not limited to cellulose triacetate.

The polarizing layer 23 is disposed between the first substrate 22 and the second substrate 24, and can be formed by a polymer or dye polymer containing iodine molecules, and is a main structure for controlling the polarization characteristics of the touch polarizing structure 2. Here, if a first linear polarization direction and a second linear polarization direction are defined perpendicular to each other, The polarizing layer 23 allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction. On the other hand, the polarizer 4 on the bottom side of the liquid crystal module 3 in Fig. 1 allows light having a second linear polarization direction to penetrate and blocks light having a first linear polarization direction. That is, the polarizing layer 23 and the polarizer 4 have polarization characteristics perpendicular to each other. Therefore, the polarizing layer 23 and the polarizer 4 disposed on opposite sides of the liquid crystal module 3 can match the liquid crystal layer in the liquid crystal module 3 to control the display effect of the image screen of the touch display device 1.

The touch sensing layer 25 is disposed under the second substrate 24 and opposite to the polarizing layer 23 on the opposite sides of the second substrate 24, so that the touch sensing signal can be generated according to the user's touch. Here, since the touch sensing layer 25 belongs to a single-layer touch structure, it has a transparent conductive electrode, an insulating layer, a metal wire, and the like, which are not shown, wherein the transparent conductive electrode can be made of nano silver or metal mesh. , indium tin oxide, graphene, carbon nanotubes, conductive polymers and other materials. In this embodiment, since the touch sensing layer 25 is directly formed on the second substrate 24, the second substrate 24 can be shared with the polarizing layer 23 as a carrier substrate, thereby reducing the overall thickness of the touch polarizing structure 2. The thin and light design of the touch polarizing structure 2 is realized.

The adhesive layer 26 and the release layer 27 are sequentially disposed under the touch sensing layer 25, and the user can adhere the touch polarizing structure 2 to the liquid crystal module 3 by the adhesive layer 26 after removing the release layer 27. .

Referring to FIG. 3 , the arrangement of the single-layer touch sensing layer 25 in this embodiment may be disposed on the second substrate 24 instead of being disposed on the bottom side of the second substrate 24 as shown in FIG. 2 . At this time, the touch sensing layer 25 It is located between the polarizing layer 23 and the second substrate 24.

In addition to the embodiments of FIG. 2 and FIG. 3, a single-layer touch sensing layer 25 may also be disposed on the first substrate 22 to provide a touch sensing function. In this state, the touch sensing layer 25 and the polarizing layer 23 are used to share the first substrate 22 as a carrier substrate, and the thickness can be reduced.

However, considering that the transparent conductive electrode in the touch sensing layer 25 may be perceived by the user in a specific state, and a so-called etch mark problem occurs, in the structural design of the single-layer touch sensing layer 25, the embodiment is The touch sensing layer 25 is disposed on the second substrate 24, and the optical property of the image light emitted from the touch sensing layer 25 is changed by the polarizing layer 23, so that the user does not easily perceive the etching trace caused by the touch sensing layer 25. Improve the quality of viewing.

Referring to FIG. 4 , the touch sensing layer 25 can be a double layer design in addition to the single layer design described above, specifically a first touch sensing layer 25 and a second disposed on opposite sides of the second substrate 24 . The transparent sensing electrodes (not shown) of the first touch sensing layer 25 and the second touch sensing layer 28 are distributed in different directions, for example, one layer is in a horizontal direction and the other layer is along the edge. In the vertical direction, in such a cooperative operation mode, both can also provide touch sensing functions. Similarly, the first touch sensing layer 25 and the second touch sensing layer 28 may also be disposed on opposite sides of the first substrate 22, respectively, and are not limited to be disposed on the second substrate 24.

Second embodiment

Referring to FIG. 5, a second embodiment of the touch-control polarizing structure 2 of the present invention is shown. Compared with the first embodiment of FIG. 2, the touch polarizing structure 2 of the present embodiment further includes a circuit board 5 including a flexible circuit substrate. 51. A plurality of wires 52 disposed on the circuit substrate 51 and a conductive adhesive 53 having a conductive adhesive function can transmit the touch sensing signals generated by the touch sensing layer 25 to an external control circuit (not shown). In the manufacturing process, the touch polarizing structure 2 of the present embodiment can perform the engraving process on the adhesive layer 26 and the release layer 27 through laser processing or the like, so that part of the surface of the touch sensing layer 25 is exposed. The circuit board 5 can be placed on its bottom side and form an electrical connection.

Referring to FIG. 6 , in this embodiment, the touch polarizing structure 2 can be configured to process the protective layer 21 , the first substrate 22 , and the polarizing layer 23 so that the circuit board 5 is An electrical connection is formed by the top side of the touch sensing layer 25.

Referring to FIG. 7 , in the case where the touch polarizing structure 2 has the first touch sensing layer 25 and the second touch sensing layer 28 , the present embodiment can simultaneously apply the protective layer 21 , the first substrate 22 , and the polarizing layer. 23, the adhesive layer 26 and the release layer 27 are processed, so that the surface of the first touch sensing layer 25 and the second touch sensing layer 28 are not covered, and can be respectively associated with a first circuit board 5 and a first The two circuit boards 5' form an electrical connection, and the second circuit board 5' is similar to the first circuit board 5, and has a circuit substrate 51', a plurality of wires 52', and a conductive paste 53'.

Therefore, in combination with the above, the touch polarizing structure 2 of the present embodiment further configures the circuit board 5 according to different implementation manners, so that the implementation of the touch polarizing structure 2 applied to the touch function is more perfect.

Third embodiment

Referring to FIG. 8 , the third implementation of the novel touch polarizing structure 2 example. In this embodiment, the touch polarizing structure 2 has a design of anti-reflection and eliminating the etching marks of the touch sensing layer 25, and thus the specific structural configuration is different from the foregoing two embodiments.

Specifically, in the foregoing two embodiments, the first substrate 22 and the second substrate 24 are made of a material such as cellulose triacetate that does not change the polarization characteristics of the light. Therefore, the polarization characteristics of the touch polarizing structure 2 are mainly Controlled by the polarizing layer 23. However, in the present embodiment, in order to further protect the touch polarizing structure 2 from anti-reflection and erasing etching, the second substrate 24' is made of N-type cellulose triacetate (N-TAC) or the like. The one-half wave plate or the second substrate 24' is made of a material such as M-type cellulose triacetate (M-TAC) as a quarter-wave plate. In addition, in the present embodiment, the touch sensing layer 25 is disposed on the second substrate 24', and the polarizing layer 23 is located on opposite sides of the second substrate 24'.

Referring to Figures 8 and 9, an embodiment in which the second substrate 24' is formed as a half-wave plate will be described below. In Fig. 9, the laterally extending double-headed arrow represents the first linear polarization direction, and the longitudinally extending double-headed arrow represents the second linear polarization direction. The polarizing layer 23, as explained above, allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction. The second substrate 24' has a fast axis (not shown) that is 45 degrees from the first linear polarization direction, and can convert the passing light to a linear polarization direction of 90 degrees. The metal lines (not shown) on the touch sensing layer 25 will reflect the linear polarization direction of 90 degrees after the light is reflected.

Accordingly, the light L1 having an external environment without a specific polarization direction passes through the polarizing layer 23, and linearly polarized light having a first linear polarization direction is formed. L2. After the linearly polarized light L2 passes through the second substrate 24', it is converted into linearly polarized light L3 having a second linear polarization direction. The linearly polarized light L3 is reflected by the touch sensing layer 25 to change the polarization direction to form linearly polarized light L4 having a first linear polarization direction. After the linearly polarized light L4 passes through the second substrate 24', its polarization direction is changed, and it is converted into linearly polarized light L5 having the second linear polarization direction. The linearly polarized light L5 cannot pass through the polarizing layer 23, but is finally blocked by the polarizing layer 23 and is not perceived by the user. Therefore, according to the above embodiment, after the second substrate 24' is configured as a half-wave plate, the degree of reflection of the ambient light can be reduced according to the conversion of the polarization characteristics of the light, thereby improving the user's Ornamental quality. On the other hand, since the polarizing layer 23 and the second substrate 24' which can change the polarization characteristics of the light are disposed between the user and the touch sensing layer 25, the image of the etching trace of the touch sensing layer 25 is polarized. After the layer 23 and the second substrate 24' are changed, they are not easily perceived by the user due to the conversion of the polarization characteristics.

Referring to Figures 8 and 10, an embodiment in which the second substrate 24' is formed as a quarter-wave plate will be described below. In FIG. 10, the horizontally extending double-headed arrow represents the first linear polarization direction, the longitudinally extending double-headed arrow is the two-line polarization direction, and the counterclockwise curved arrow represents a first circular polarization direction, clockwise. The curved arrow represents a second circular polarization direction, which is opposite to the circular polarization direction of the second circular polarization direction. The polarizing layer 23, as explained above, allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction. The second substrate 24' has a fast axis that is 45 degrees from the first linear polarization direction, and converts the passing light between the linearly polarized light and the circularly polarized light. Touch sensing layer The metal line (not shown) on the 25 will reflect the light and then reverse its circular polarization.

Therefore, according to the above characteristics, the light ray L1 having an external environment without a specific polarization direction passes through the polarizing layer 23, and linearly polarized light L2 having a first linear polarization direction is formed. After the linearly polarized light L2 passes through the second substrate 24', it is converted into circularly polarized light L3 having a first circular polarization direction. The circularly polarized light L3 is reflected by the touch sensing layer 25 to change the polarization direction to form circularly polarized light L4 having a second circular polarization direction. After passing through the second substrate 24', the circularly polarized light L4 changes its polarization property and is converted into linearly polarized light L5 having a second linear polarization direction. The linearly polarized light L5 cannot pass through the polarizing layer 23 but is blocked by the polarizing layer 23. Therefore, according to the above embodiment, after the second substrate 24' is configured as a quarter-wave plate, the touch polarizing structure 2 can reduce the reflection of ambient light according to the polarization characteristics of the light. The degree to enhance the user's viewing quality. Further, the touch polarizing structure 2 can also achieve the purpose of eliminating etching marks by the arrangement of the polarizing layer 23 and the second substrate 24'.

Fourth embodiment

Referring to FIG. 11, a fourth embodiment of the touch-control polarizing structure 2 of the present invention is shown. The touch polarizing structure 2 of the present embodiment is similar to the third embodiment, and has the same anti-reflection and anti-etching design. However, in this embodiment, the second substrate 24 of the touch polarizing structure 2 maintains the embodiments of the first and second embodiments without changing the polarization characteristics of the light, but is provided by an additionally disposed optical compensation layer 6. The function of a half-wave plate or a quarter-wave plate.

Specifically, compared with the foregoing embodiment, the touch of this embodiment The polarization controlling structure 2 further includes an optical compensation layer 6 and a second adhesive layer 29. The optical compensation layer 6 and the polarizing layer 23 are respectively located on opposite sides of the second substrate 24, and the optical compensation layer 6 is attached to the second substrate 24 through the second adhesive layer 29. The touch sensing layer 25 is disposed on the optical compensation layer 6 and is located on opposite sides of the optical compensation layer 6 from the polarizing layer 23, respectively. Therefore, when the optical compensation layer 6 is implemented by a half-wave plate or a quarter-wave plate, it can be similar to the second substrate 24' in the third embodiment, and is converted by the polarization characteristic of the light to make the touch The polarizing structure 2 has a function of anti-reflection and eliminating etching marks. Regarding the influence of the optical compensation layer 6 on the polarization characteristics of the light, it is similar to the second substrate 24' in Figs. 9 and 10, and therefore will not be described again.

In combination with the foregoing four embodiments, the touch-sensitive polarizing structure 2 can share the first substrate 22 or the second substrate 24 by the touch sensing layer 25 and the polarizing layer 23, thereby implementing the touch polarizing structure 2 and the touch display device. 1 is light and thin. In addition, a further configuration of the touch polarizing structure 2 can be provided by the arrangement of the circuit board 5. In addition, whether the second substrate 24 is implemented by a half wave plate or a quarter wave plate, or the optical compensation layer 6 is disposed in the touch polarizing structure 2, the touch polarizing structure 2 can be made resistant. Reflect and eliminate the effects of etch marks. Therefore, the touch display structure 2 and the touch display device 1 of the present invention can achieve the object of the present invention.

However, the above description is only for the embodiments of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent changes and modifications made by the present patent application scope and the contents of the patent specification are still It is within the scope of this new patent.

2‧‧‧Touch polarized structure

21‧‧‧Protective layer

22‧‧‧First substrate

23‧‧‧ polarizing layer

24‧‧‧Second substrate

25‧‧‧ touch sensing layer

26‧‧‧Adhesive layer

27‧‧‧ release layer

Claims (13)

A touch polarizing structure includes: a first substrate; a second substrate spaced apart from the first substrate; and a polarizing layer disposed between the first substrate and the second substrate, The polarizing layer allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction, the first linear polarization direction and the second linear polarization direction being perpendicular to each other; and at least one touch sensing layer And disposed on one of the first substrate and the second substrate. The touch-sensitive layer has two layers, and the touch-sensing layers are respectively disposed on opposite sides of the first substrate or the second substrate. The touch-sensitive polarizing structure of claim 1, further comprising a protective layer, the protective layer and the polarizing layer being respectively located on opposite sides of the first substrate. The touch-sensitive polarizing structure of claim 1, further comprising an adhesive layer, wherein the adhesive layer and the polarizing layer are respectively located on opposite sides of the second substrate. The touch-sensitive polarizing structure of claim 4, further comprising a release layer attached to the adhesive layer and located on opposite sides of the adhesive layer from the touch sensing layer. The touch polarizing structure of claim 1, wherein a part of the surface of the touch sensing layer is not covered by the first substrate, the second substrate or the polarizing layer, and the touch polarizing structure further comprises a circuit a circuit board disposed on an uncovered surface of the touch sensing layer and electrically connected to the touch sense Should be layered. The touch polarizing structure of claim 2, wherein part of the surface of the touch sensing layer is not covered by the first substrate, the second substrate or the polarizing layer, and the touch polarizing structure is further The circuit board is disposed on the uncovered surface of the touch sensing layers, and is electrically connected to the touch sensing layers. The touch polarizing structure of claim 1, wherein the second substrate is a half wave plate and has a fast axis that is at a 45 degree angle to the first linear polarization direction; the touch sensing layer The second substrate is disposed on the opposite side of the second substrate from the polarizing layer. The touch polarizing structure of claim 1, wherein the second substrate is a quarter-wave plate and has a fast axis that is at a 45-degree angle to the first linear polarization direction; the touch sensing layer The second substrate is disposed on the opposite side of the second substrate from the polarizing layer. A touch polarizing structure includes: a first substrate; a second substrate spaced apart from the first substrate; and a polarizing layer disposed between the first substrate and the second substrate, The polarizing layer allows light having a first linear polarization direction to penetrate and blocks light having a second linear polarization direction, the first linear polarization direction and the second linear polarization direction being perpendicular to each other; an optical compensation layer, and the The polarizing layers are respectively located on opposite sides of the second substrate; and a touch sensing layer is disposed on the optical compensation layer and is coupled to the polarizing layer The layers are respectively located on opposite sides of the optical compensation layer. The touch polarizing structure of claim 10, wherein the optical compensation layer is a half wave plate and has a fast axis that is at a 45 degree angle to the first linear polarization direction. The touch polarizing structure of claim 10, wherein the optical compensation layer is a quarter-wave plate and has a fast axis that is at an angle of 45 degrees to the first linear polarization direction. A touch display device comprising: a liquid crystal module; the touch polarizing structure according to any one of claims 1 to 12, disposed in the liquid crystal module; and a polarizer disposed on the liquid crystal module And the touch polarizing structure is respectively located on opposite sides of the liquid crystal module, the polarizer allows light having the second linear polarization direction to penetrate, and blocks the light having the first linear polarization direction.