TWI811145B - Border touch module and display device - Google Patents

Abstract

The disclosure provides a border touch module, including a cover plate, a blocking layer having a backlight icon, a first adhesive layer, a sensing electrode layer, a second adhesive layer, and a backlight layer. The blocking layer is disposed below the cover plate. The first adhesive layer is disposed below the blocking layer. The sensing electrode layer is disposed below the first adhesive layer. The second adhesive layer is disposed below the sensing electrode layer. The backlight layer is disposed below the sensing electrode and is in the same plane as the second adhesive layer. The backlight layer includes an opaque adhesive having a light source hole, a light guide layer, and an LED. The light source hole corresponds to the backlight icon. The light guide layer is disposed below the partial opaque adhesive. The LED is disposed adjacent the light guide layer and is in the same plane as the light guide layer.

Description

Frame touch module and display device

The present disclosure relates to a frame touch module and a display device, in particular to a frame touch module and a display device having a touch-sensitive backlight pattern in a frame area of a display screen.

With the advancement of technology, portable electronic products such as smart phones, notebook computers and tablet computers, or any electronic products with display screens, widely use touch devices as user operation interfaces.

With the development of display technology, reducing the frame width of the non-display area is often a technology that needs to be developed urgently in the field. However, the narrowness of the frame still has its limit, and the frame cannot be completely discarded. Therefore, how to make good use of the frame area and make it have functions such as an operation interface is an urgent problem to be solved.

The purpose of the present disclosure is to provide a frame touch module, including a cover plate, a shielding layer with a backlight pattern, a first adhesive layer, a sensing electrode layer, a second adhesive layer and a backlight layer. The shielding layer is arranged under the cover plate. The first adhesive layer is disposed under the shielding layer. The sensing electrode layer is disposed under the first adhesive layer. The second adhesive layer is disposed under the sensing electrode layer. The backlight layer is disposed under the sensing electrode layer and is on the same plane as the second adhesive layer. The backlight layer includes an opaque glue with a light source through hole, a light guide layer and a light emitting diode. The light source via hole is set correspondingly to the backlight pattern. The light guide layer is disposed under the light-tight adhesive. The light emitting diode is adjacent to the light guiding layer and is located on the same plane as the light guiding layer.

In some embodiments, the opaque adhesive is disposed between the light guide layer and the sensing electrode layer.

In some embodiments, the backlight layer includes a flexible printed circuit board, extending from the backlight layer in a direction away from the second adhesive layer, and the light guide layer and the light-emitting diodes are disposed on the plane of the flexible printed circuit board.

In some embodiments, the frame touch module further includes adhesive, which covers part of the upper surface of the flexible printed circuit board, part of the upper surface and sidewalls of the light-emitting diodes, and adheres to part of the lower surface of the shielding layer.

In some embodiments, the backlight layer is located at or adjacent to the perimeter of the second adhesive layer.

In some embodiments, the light emitting diode is far away from the second adhesive layer relative to the light guide layer.

In some embodiments, the frame touch module further includes a plurality of opaque adhesives, the opaque adhesive includes a first opaque adhesive for bonding the flexible printed circuit board and the display layer, and a first opaque adhesive for bonding the flexible printed circuit board and the display layer. The second opaque adhesive for the light guide layer, and the third opaque adhesive for bonding the second adhesive layer with the light guide layer and the flexible printed circuit board.

In some embodiments, the thickness of the second adhesive layer is between about 300 microns and about 400 microns.

In some embodiments, the thickness of the second adhesive layer is 350 microns.

Another object of the present disclosure is to provide a display device, which includes the aforementioned frame touch module and a display layer, and the display layer is disposed under the second adhesive layer and the light-proof adhesive.

The following disclosure provides many different embodiments or examples for implementing different features of the presented subject matter. Specific examples of elements, values, operations, materials, configurations, and the like are described below to simplify the present disclosure. Of course, these are examples only and are not intended to be limiting. Other components, values, operations, materials, configurations, and the like must also be considered. For example, in the description below, forming a first feature over a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which the first and second features may be formed between the first and second features. Embodiments in which an additional feature is formed between such that the first feature and the second feature are not in direct contact. Additionally, the present disclosure may repeat reference numerals and/or text in various examples. This repetition does not in itself indicate a relationship between the various embodiments and/or configurations discussed.

In addition, for the convenience of description, spatially relative terms such as "below", "below", "below", "above", "above" etc. may be used in the present disclosure. terms to describe one element or feature with another or more elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Generally, the frame touch module disclosed in this disclosure can be used in any electronic product with display and touch functions, such as smart phones, notebook computers, tablet computers, screens with touch functions, automobiles and motorcycles with touch functions Mirrors and more. And it can effectively solve how to make good use of the area where the frame is located so that it also has the function of the operator interface when the frame cannot be completely discarded.

First, please refer to FIG. 1 . FIG. 1 is a schematic top view showing relative positions between the bezel touch module and the bezel touch device according to some embodiments of the present disclosure. As shown in FIG. 1 , the frame touch device 10 includes a visible area VA, a frame area PA and a connecting area CA, the frame area PA surrounds the visible area VA, and the connecting area CA is connected to the frame area PA. It should be noted that since FIG. 1 is a top view and cannot completely depict the frame touch module of the present disclosure, the position of the backlight pattern 175 can be referred to. Generally, one backlight pattern 175 and its surroundings can represent one frame touch module, or one frame touch module can be provided with multiple backlight patterns 175 .

In some implementations of the present disclosure, FIG. 1 shows that the bezel touch module is disposed on the lower bezel of the bezel touch device, which is just an example and should not be used to limit the present disclosure. The frame touch module can be arranged in all frame areas PA of the frame touch device 10 . In some embodiments of the present disclosure, FIG. 1 shows that six backlight patterns 175 are disposed on the frame touch module, which is just an example and should not be used to limit the present disclosure. The number of backlight patterns 175 disposed in the frame area PA can be set according to the required functions, including, but not limited to, between 1 and 100.

Next, please refer to FIG. 2 . FIG. 2 is a schematic cross-sectional view showing the cross-sectional line X2 - X2 of the frame touch device 10 in FIG. 1 . As shown in FIG. 2 , from the perspective of section line X2 - X2 , the frame touch module 100 includes a visible area VA and a frame area PA, and it can be known from FIG. 1 that the frame area PA surrounds the visible area VA. In some embodiments, the frame touch module 100 further includes a display layer 120 , a second adhesive layer 130 , a backlight layer 140 , a sensing electrode layer 150 , a first adhesive layer 160 , a shielding layer 170 and a cover plate 180 .

In some implementations, the display layer 120 is disposed at the bottom of the visible area VA and the frame area PA. In one embodiment, the display layer 120 may include an organic light emitting diode (OLED).

As shown in FIG. 2, in some embodiments, the second adhesive layer 130 is disposed on the display layer 120 and extends from the visible area VA to the frame area PA. The second adhesive layer 130 can add a recess, and the recess is located in the frame area. PA. It should be noted first that, in order to avoid too much confusion in the component symbols in the drawings, the component symbols of the recesses are not marked in the second figure. Specifically, the concave portion is where the backlight layer 140 is disposed, and the features of the backlight layer 140 will be described in detail in subsequent paragraphs, and will not be described here.

Here, please refer to FIG. 3 first. FIG. 3 is a schematic top view showing the second adhesive layer in the frame touch module shown in FIG. 1 according to some embodiments of the present disclosure. Specifically, the second adhesive layer 130 shown in FIG. 3 is one of the layers of the frame touch device 10 in FIG. 1 . It can be clearly seen from FIG. 2 that when the second adhesive layer 130 extends to the frame area PA, it is a plane with flat sides on all four sides. However, it can be seen from the example in FIG. All the recesses 132 are located in the frame area PA and do not contact the display area VA. In some embodiments, the concave portion 132 is to be embedded in a backlight layer (not shown in this figure), and can match the backlight pattern 175 shown in FIG. 1 . It should be noted that Figure 3 shows two recesses 132, which are only exemplary, and the second adhesive layer 130 can be a flat plane with four sides, or designing more or only one recess 132 can be applied to this disclosure. .

In one embodiment, the second adhesive layer 130 can be any adhesive with light-transmitting material, including, but not limited to, optical glue or other similar adhesives. In one embodiment, the thickness of the second adhesive layer 130 is between about 300 microns and about 400 microns. In some embodiments, the thickness of the second adhesive layer 130 can be, but not limited to, 300 microns, 310 microns, 320 microns, 330 microns, 340 microns, 350 microns, 360 microns, 370 microns, 380 microns, 390 microns, 400 microns or any value in between. Specifically, the thickness of the second adhesive layer 130 can match the thickness of the backlight layer 140, so that the backlight layer 140 can be disposed and adjacent to any side of the second adhesive layer 130, or, when the second adhesive layer 130 is provided with the concave portion 132, The backlight layer 140 can be disposed closer to the viewable area VA. It should be noted that the second adhesive layer 130 may have different thicknesses according to various thicknesses of the backlight layer 140 .

In some embodiments, the backlight layer 140 is disposed on the display layer 120, adjacent to the first adhesive layer 160, and located in the frame area PA. And, specifically, the backlight layer 140 is located at or adjacent to the periphery of the second adhesive layer 130 , and when the second adhesive layer 130 is designed with the recess 132 , the backlight layer 140 can be closer to the visible area VA. It should be noted that, in order to facilitate the description of the features of each component or layer in the backlight layer 140 , all layers or structures of the frame touch module 100 in the present disclosure will be described first.

In some embodiments, the sensing electrode layer 150 is disposed under the first adhesive layer 160 and located in the visible area VA and the frame area PA. In one embodiment, the sensing electrode layer 150 includes an active area 152 and a trace area 154 . The active area 152 extends from the visible area VA to a part of the frame area PA. The trace area 154 is connected to the active area 152 and located in the frame area PA. In some embodiments, the material of the active region 152 of the sensing electrode layer 150 includes, but is not limited to, transparent metal oxides such as indium tin oxide (ITO) or indium zinc oxide (IZO), Or flexible conductive materials such as metal mesh, Silver Nano Wire (SNW), graphene or carbon nanotubes. In some embodiments, the trace area 154 of the sensing electrode layer 150 is used to electrically connect various structures in the bezel touch module 100 . The material of the trace region 154 may include, but is not limited to, carbon nanotubes, silver nanotubes, or copper nanotubes, or combinations thereof.

In some embodiments, the first adhesive layer 160 is disposed on the sensing electrode layer 150 and located in the visible area VA and the frame area PA. In one embodiment, the first adhesive layer 160 can be any adhesive agent with transparent material, including, but not limited to, optical glue or other similar adhesive layer agents.

Still referring to FIG. 2, in some embodiments, the shielding layer 170 is disposed under the cover plate 180, and on a part of the first adhesive layer 160, the shielded area forms a frame area PA. Similarly, its The unshaded area forms the viewable area VA. Wherein the shielding layer 170 has a backlight pattern 175, and the backlight pattern 175 can be a character, a symbol or a pattern. In one embodiment, the shielding layer 170 can be a dark shielding layer (such as a black shielding layer) or a light shielding layer (such as a white shielding layer). In some embodiments, the material of the masking layer 170 can be dark ink (such as black ink) or light color ink (such as white ink). In one embodiment, the ink components used in the masking layer 170 include ethylbenzene, xylene, pigment, polyester resin, glycol ether solvent, additives or its combination.

In some embodiments, the arrangement of the backlight pattern 175 corresponds to the backlight layer 140 below it, because the light required by the backlight pattern 175 is emitted by the backlight layer 140 . In one embodiment, the backlight pattern 175 is hollowed out and filled with a transparent or translucent film material. The hollowed out shape is formed by drawing different characters, symbols or patterns according to the functions it represents to form the backlight pattern 175 . In some embodiments, the material of the backlight pattern 175 includes, but not limited to, ethylbenzene, xylene, pigment, polyester resin, glycol ether solvent, additives or combinations thereof.

In some embodiments, the cover plate 180 is disposed on a portion of the first adhesive layer 160 and the shielding layer 170 , and the visible area VA and the frame area PA are formed by the shielded or unshielded areas of the shielding layer 170 . In one embodiment, the material of the cover plate 180 can be a hard transparent material or a flexible transparent material, and the material can be selected from glass, acrylic (polymethylmethacrylate, PMMA), polyvinyl chloride (polyvinyl chloride, PVC), poly Propylene (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polystyrene (polystyrene, PS), cyclo olefin polymers (cyclo olefin polymers, COP), cyclo olefin copolymers (cyclo olefin copolymer, COC) and other transparent materials.

Please continue to refer to FIG. 2. In order to effectively utilize the frame area PA, the aforementioned second adhesive layer 130 is provided, and the second adhesive layer 130 is designed to be similar to a local space (ie, the concave portion shown in FIG. 3 ). 132) so as to be closer to the visible area VA when the backlight layer 140 is provided. In one embodiment, the backlight layer 140 includes a flexible printed circuit board 142 , a light guide layer 143 and a light emitting diode 145 .

In one embodiment, the flexible printed circuit board 142 is disposed on the display layer 120 and extends from the backlight layer 140 to the outside of the frame area PA in a direction away from the first adhesive layer 160 .

In one embodiment, the light guide layer 143 is disposed on the flexible printed circuit board 142 in the backlight layer 140 . In some embodiments, the material of the light guide layer 143 includes a light-transmitting material, such as but not limited to, silicone resin, epoxy resin, acrylic glue or a combination thereof. The light guide layer 143 is used to guide the light emitted by the LED 145 to the backlight pattern 175 .

In one embodiment, the light emitting diode 145 is disposed on the flexible printed circuit board 142 and adjacent to the light guide layer 143 . In some embodiments, light emitting diodes 145 can be light emitting diodes of any size. In some embodiments, the light emitting diode 145 may be a submillimeter light emitting diode chip (mini LED chip) or a micro light emitting diode chip (micro LED chip), but not limited thereto.

In one embodiment, the adhesive 146 covers part of the upper surface of the flexible printed circuit board 142 and part of the upper surface and sidewalls of the LED 145 , and adheres to a part of the lower surface of the shielding layer 170 . Adhesive 146 is It is used to fix the light-emitting diode 145 and maintain the stability among the flexible printed circuit board 142 , the light-emitting diode 145 and the shielding layer 170 . Furthermore, the adhesive glue 146 can make up for the reduced bonding strength when the second adhesive layer 130 cannot be fully bonded due to the local space formed by the concave portion 132 .

In some embodiments, the flexible printed circuit board 142 and the light guide layer 143 in the backlight layer 140 are adhered to each other by a plurality of opaque adhesives 141, and are connected to the display layer 120, the second adhesive layer 130 and the sensing electrodes at the same time. Layer 150 is bonded. Specifically, among these opaque adhesives 141, the first opaque adhesive layer 1411 is disposed between the flexible printed circuit board 142 and the display layer 120, and the second opaque adhesive layer 1412 is disposed on the light guide layer. 143 and the flexible printed circuit board 142, the fourth opaque adhesive layer 1414 is disposed between the sensing electrode layer 150 and the light guide layer 143, and the third opaque adhesive layer 1413 is disposed on the second adhesive layer 130 and the light guide layer 143 and the flexible printed circuit board 142 . Moreover, the opaque adhesive 141 disposed between the sensing electrode layer 150 and the light guide layer 143 has a light source through hole 144 corresponding to the backlight pattern 175 .

These opaque adhesives 141 are used to block the light emitted from the light-emitting diodes 145 and prevent the light emitted from the light-emitting diodes 145 from leaking into other layers such as the first adhesive layer 160 . Moreover, in order to transmit the light emitted from the light emitting diode 145 to the backlight pattern 175 through the light guide layer 143, a light source is provided on the light-proof adhesive 141 between the sensing electrode layer 150 and the light guide layer 143. The via hole 144 is used to facilitate light emission. Specifically, the position of the light source through hole 144 should correspond to the position of the backlight pattern 175 above it, otherwise the light cannot be smoothly transmitted to the backlight pattern 175 . Furthermore, the opaque adhesive 141 can make up for the reduced bonding strength when the second adhesive layer 130 cannot be fully bonded due to partial displacement.

In some embodiments, the material of the opaque adhesive 141 includes, but is not limited to, black foam, black double-sided tape or a combination thereof.

Accordingly, the present disclosure utilizes the second adhesive layer 130 that is not fully bonded between the sensing electrode layer 150 and the display layer 120, or the second adhesive layer 130 is designed with a recess 132, all of which are for the purpose of setting a backlight. The layer 140 can make good use of the frame area PA, so that the frame area PA is not only used as a frame support, but also has the function of an operator interface.

The foregoing disclosure outlines features of several embodiments so that those skilled in the art may better understand the various aspects of the present disclosure. Those skilled in the art will appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures to achieve the same purposes and/or achieve the same benefits as the embodiments introduced in this disclosure. Those skilled in the art should also understand that although the present disclosure has been disclosed above in various embodiments, it is not intended to limit the present disclosure. Changes and retouching, so the scope of protection of this disclosure should be defined by the scope of the appended patent application.

10: Border touch device

100: Border touch module

120: display layer

130: Second adhesive layer

132: concave part

140: backlight layer

141: opaque viscose

1411: The first opaque adhesive

1412: The second opaque adhesive

1413: The third opaque adhesive

1414: The fourth opaque adhesive

142: Flexible printed circuit board

143: light guide layer

144: Light source via hole

145: light emitting diode

146: Adhesive glue

150: sensing electrode layer

152: active area

154: Trace area

160: the first adhesive layer

170: masking layer

175: backlight pattern

180: cover plate

CA: Connection Area

VA: visible area

PA: border area

X2-X2: hatching

Aspects of the present disclosure are best understood from the following detailed description when read in conjunction with the accompanying figures. It should be understood, as is common in the industry, that various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or decreased for clarity. FIG. 1 is a schematic top view showing relative positions between a frame touch module and a frame touch device according to some embodiments of the present disclosure. FIG. 2 is a schematic cross-sectional view of the touch device according to the frame X2-X2 in FIG. 1 . FIG. 3 is a schematic top view illustrating a second adhesive layer in the frame touch module shown in FIG. 1 according to some embodiments of the present disclosure.

100: Border touch module

120: display layer

130: Second adhesive layer

140: backlight layer

141: opaque viscose

1411: The first opaque adhesive

1412: The second opaque adhesive

1413: The third opaque adhesive

1414: The fourth opaque adhesive

142: Flexible printed circuit board

143: light guide layer

144: Light source via hole

145: light emitting diode

146: Adhesive glue

150: sensing electrode layer

152: active area

154: Trace area

160: the first adhesive layer

170: masking layer

175: backlight pattern

180: cover plate

VA: visible area

PA: border area

Claims (10)

A frame touch module, comprising: a cover plate; a shielding layer with a backlight pattern arranged under the cover plate; a first adhesive layer arranged under the shielding layer; a sensing electrode layer, arranged under the first adhesive layer; a second adhesive layer arranged under the sensing electrode layer; and a backlight layer arranged under the sensing electrode layer and connected with the second adhesive layer The layers are located on the same plane, the backlight layer includes: an opaque adhesive with a light source through hole, the light source through hole is arranged corresponding to the backlight pattern; a light guide layer is arranged under part of the opaque adhesive; and a light-emitting diode, which is adjacent to the light-guiding layer and located on the same plane as the light-guiding layer. The frame touch module according to claim 1, wherein the light-proof adhesive is disposed between the light guide layer and the sensing electrode layer. The frame touch module according to claim 1, wherein the backlight layer further includes a flexible printed circuit board extending from the backlight layer in a direction away from the second adhesive layer, and the light guide layer and the light emitting two The pole body is arranged on one plane of the flexible printed circuit board. The border touch module as described in request item 3 further includes a Adhesive glue, the adhesive glue covers a part of the upper surface of the flexible printed circuit board, a part of the upper surface and a side wall of the light-emitting diode, and adheres to a part of the lower surface of the shielding layer. The frame touch module according to claim 1, wherein the backlight layer is located around the second adhesive layer. The frame touch module according to claim 1, wherein the light emitting diode is far away from the second adhesive layer relative to the light guide layer. The frame touch module as described in claim 3 further includes a plurality of opaque adhesives, and these opaque adhesives include: a first opaque adhesive for bonding the flexible printed circuit board; a first opaque adhesive Two opaque adhesives for bonding the flexible printed circuit board and the light guide layer; and a third opaque adhesive for bonding the second adhesive layer with the light guide layer and the flexible printed circuit board. The frame touch module according to claim 1, wherein the thickness of the second adhesive layer is between 300 microns and 400 microns. The frame touch module according to Claim 1, wherein the thickness of the second adhesive layer is 350 microns. A display device, comprising: the frame touch module according to any one of Claims 1 to 9, and a display layer, the display layer is arranged under the second adhesive layer and the light-proof adhesive.

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