TW201643666A - Touch display structure - Google Patents

Abstract

A touch display structure including a display module having a display surface, a substrate having a first area and a second area differing to each other, a first sensing electrode pattern layer, and a second sensing electrode layer is provided. At least a portion of the substrate is disposed on the display surface, wherein the first sensing electrode pattern layer is disposed in the first area, and the second sensing electrode pattern layer is disposed in the second area. The first and the second sensing electrode pattern layers are on a same surface of the substrate, and the second sensing electrode pattern layer is composed of at least one coil.

Description

Touch display structure

The invention relates to a touch display structure.

According to the rapid development of electronic technology and multimedia information, handheld electronic devices such as notebook computers, tablet computers, smart phones, and personal digital assistants are moving toward a light, short, and versatile trend, mainly with small size and light weight. It is easy to carry and other features, coupled with the continuous innovation of soft and hard functions, the use of more practical effects, has become an indispensable part of people's work and life entertainment and is widely used.

However, if the handheld electronic device is to be carried around, the first thing that must be solved is the power problem. The most common way is to install a rechargeable battery inside the handheld electronic device with a compatible power supply. The rechargeable battery can be recharged when the power is exhausted, but the handheld electronic devices of each brand have different specifications, and different power supplies are required to be charged, resulting in a significant increase in the cost of acquisition. If the power supply device with multiple handheld electronic devices is not only inconvenient to organize the wires, but also takes up a certain space, it is not conducive to storage or carrying.

In order to solve the above problems, various types of wireless charging devices have emerged. The wireless charging device mainly uses the principle of electromagnetic induction to exchange electric energy and magnetic field, thereby achieving the purpose of charging the electronic device. A simple application of the principle of electromagnetic induction is shown below. First, electrical energy is supplied to cause a current to pass through a coil in the wireless charging device to generate a magnetic field change. Then, the coil in the electronic device senses a change in the magnetic field in the environment, and converts the magnetic field change into a current, thereby charging the battery in the electronic device. Complete wireless charging of the electronic device.

However, the current wireless charging device needs to additionally install an induction coil on the existing electronic device, which not only does not help the electronic device to be light, thin and short, and thus increases its manufacturing cost.

The invention provides a touch display structure, which simultaneously forms a sensing electrode layer for touch application on a substrate, and forms a coil-shaped sensing electrode layer, so that the electronic device achieves the charging effect by the touch display structure.

The touch display structure of the present invention comprises a display module, a first substrate, a first sensing electrode layer and a second sensing electrode layer. The display module has a display surface. At least a portion of the first substrate is disposed on the display surface, and the first substrate has first and second regions that are different from each other. The first sensing electrode layer is disposed in the first region, and the second sensing electrode layer is disposed in the second region. The first sensing electrode layer and the second sensing electrode layer are located on the same surface of the first substrate, and the second sensing electrode layer has at least one coil profile.

In an embodiment of the invention, the first sensing electrode layer and the second sensing electrode layer are formed by a metal mesh.

In an embodiment of the invention, the first sensing electrode layer located in the first region and the second sensing electrode layer in the second region are stacked on the display surface.

In an embodiment of the invention, the first region includes a plurality of first sub-regions, the second region includes a plurality of second sub-regions, and the first sub-region and the second sub-region are alternately arranged with each other.

In an embodiment of the invention, the first region forms a touch sensing pattern region, and the second region forms a simulated pattern region with respect to the first region.

In an embodiment of the invention, the first substrate has flexibility, and the first substrate is folded to sandwich the display module. The first sensing electrode patterns located in the first region are stacked on the display surface, and the second sensing electrode patterns in the second region are stacked on the back surface of the display module, wherein the display surface and the back surface are opposite to each other.

In an embodiment of the invention, the bonding pad is further disposed in the first region, and the guiding pad is electrically connected between the first sensing electrode layer and the second sensing electrode layer.

In an embodiment of the invention, the method further includes at least one third sensing electrode layer disposed in the second region and electrically connected to the guiding pad.

In an embodiment of the invention, the second substrate, the fourth sensing electrode layer, and the fifth sensing electrode layer are further included. The second substrate has flexibility. The fourth sensing electrode layer is disposed on a portion of the second substrate, and the fifth sensing electrode layer is disposed in another portion of the second substrate. The fifth sensing electrode layer has at least one coil profile. First The second substrate is folded to sandwich the display module and the first substrate, so that the fourth sensing electrode pattern is stacked on the display surface and the first sensing electrode layer, and the fifth sensing electrode layer is stacked on the back surface and the second surface. On the sensing electrode layer.

In an embodiment of the invention, the first sensing electrode layer has a plurality of first serial electrodes, and the fourth sensing electrode layer has a plurality of second serial electrodes, and the first serial electrodes have different serial directions In the serial direction of the second series of electrodes.

In an embodiment of the invention, the second sensing electrode layer and the fifth sensing electrode layer stacked on each other respectively have a gap, and the notches overlap and are in the same direction.

In an embodiment of the invention, the second sensing electrode layer presents a plurality of concentric coil profiles.

In an embodiment of the invention, the second sensing electrode layer presents an array of a plurality of concentric coil profiles.

Based on the above, in the above embodiment of the present invention, the touch display structure forms a first sensing electrode layer and a second sensing electrode layer in different regions of the first substrate, and the two sensing electrodes are in the process The first sensing electrode layer is used as a touch, and the second sensing electrode layer forms a coil contour, so that the touch display structure can have a second sensing electrode while having a touch function. The layer provides the purpose of transmitting or receiving electromagnetic waves, and the electronic device can achieve multiple functions by the touch display structure therein without separately setting related components.

In order to make the above features and advantages of the present invention more apparent, the following is a special The embodiments are described in detail below in conjunction with the drawings.

20‧‧‧ glass cover

30‧‧‧Back cover

100,200‧‧‧ touch display structure

110, 230, 310, 410‧‧‧ first sensing electrode layer

112, 114‧‧‧ tandem electrodes

116‧‧‧ Guide pad

118‧‧‧ third induction electrode layer

120, 240, 320, 420‧‧‧ second sensing electrode layer

130, 210, 330, 430‧‧‧ first substrate

140‧‧‧ display module

150‧‧‧ boards

220‧‧‧second substrate

250‧‧‧fourth sensing electrode layer

260‧‧‧ fifth induction electrode layer

412, 422‧‧‧ terminals

A1, A3‧‧‧ first district

A11, A12, A13, A14‧‧‧ first sub-area

A2, A4‧‧‧ second district

A21, A22, A23‧‧‧Second sub-area

S1‧‧‧ display surface

S2‧‧‧Back

V1, V2, V3‧‧‧ gap

FIG. 1 is a schematic view showing the assembly of a touch display structure according to an embodiment of the invention.

2 is a schematic view of a first substrate in the touch display structure of FIG. 1.

3 is a schematic view showing the assembly of a touch display structure according to another embodiment of the present invention.

4 and FIG. 5 are partial schematic views of the first substrate and the second substrate in the touch display structure of FIG. 3, respectively.

FIG. 6 is a schematic diagram of a configuration on a first substrate in a touch display structure according to another embodiment of the invention.

FIG. 7 is a top plan view of a touch display structure according to another embodiment of the invention.

FIG. 1 is a schematic view showing the assembly of a touch display structure according to an embodiment of the invention. 2 is a schematic view of a first substrate in the touch display structure of FIG. 1. Referring to FIG. 1 and FIG. 2 simultaneously, in the embodiment, the touch display structure 100 is suitable for being assembled in a partial structure of an electronic device. Only a part of the electronic device is shown, except for the touch display structure 100. A cover glass 20 and a back cover 30. The touch display structure 100 includes a display module 140 , a first substrate 130 , a first sensing electrode layer 110 , a second sensing electrode layer 120 , and a circuit board 150 . The display module 140 is, for example, a liquid crystal display module having a display surface S1 and a back surface S2, and the glass cover 20 is covered. On the display surface S1, the circuit board 150 and the back cover 30 are disposed on the back surface S2, wherein the circuit board 150 is used to drive the display module 140. The first substrate 130 is a flexible film such as polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), polycarboxylate (PC) or polyimine ( Polyimide, PI), etc., but not limited thereto, and a portion of the first substrate 130 is disposed on the display surface S1.

The first sensing electrode layer 110 and the second sensing electrode layer 120 are respectively made of a transparent conductive material, such as Indium tin oxide (ITO), Indium-Zinc Oxide (IZO), and Zinc Oxide Gallium (GZO). , Carbon Nanotube, nano-silver, conducting polymers, graphene, terpene or other highly conductive light-transmitting materials, but not limited to . As shown in FIG. 2, the first sensing electrode layer 110 and the second sensing electrode layer 120 are disposed on the same surface of the first substrate 130 but in different regions.

Referring to the first substrate 130 of FIG. 1 and FIG. 2 again, in detail, in the embodiment, the first substrate 130 is divided into first and second regions A1 and A2, which are different from each other, wherein the first sensing electrode layer 110 is applied to the first area A1, and the second sensing electrode layer 120 is applied to the second area A2. As shown in FIG. 1, the first substrate 130 can be folded to sandwich the display module 140 and the circuit board 150. . In other words, the folded first substrate 130 has a first region A1 (with the first sensing electrode layer 110 thereon) and a second region A2 (with the second sensing electrode layer 120 thereon) in a state of being opposite to each other. The first area A1 and the first sensing electrode layer 110 are stacked on the display surface S1 of the display module 140, and the second area A2 and the second sensing electrode layer 120 are stacked. It is placed on the back surface S2 of the display module 140 (where the circuit board 150 is located between the back surface S2 and the second area A2 of the first substrate 130).

The first sensing electrode layer 110 located in the first area A1 serves as a touch for the display module 140, and includes a plurality of serial electrodes 112 and 114 insulated from each other in different directions, and is a wire (the same as the first sensing electrode) The portion of the layer 110 is connected to a bonding pad 116, and the circuit board 150 is electrically connected to the via pad 116 to achieve the effect of driving the series electrodes 112, 114. Furthermore, as described above, since the first sensing electrode layer 110 and the second sensing electrode layer 120 are located on the same surface of the first substrate 130, the second sensing electrode layer 120 is coated while the first sensing electrode layer 110 is coated. It can also be coated together. It should be noted that the second sensing electrode layer 120 of the present embodiment has at least one coil profile, which is a concentric coil profile as shown, and is electrically connected to the guiding pad 116. Accordingly, the second sensing electrode layer 120 can also be smoothly driven by the circuit board 150.

In this way, by the flexible property of the first substrate 130, when the coating process of the first sensing electrode layer 110 for touch is performed, and thus the other portion of the first substrate 130 (ie, the second region described above) A2) coating the second sensing electrode layer 120 in the outline of the coil, so that after the touch display structure 100 is completed, in addition to the original touch function, the second sensing on the back surface S1 of the display module 140 can be used. The electrode layer 120 achieves the effect of wireless charging, that is, the second inductive electrode layer 120 forms an inductive coil that receives electromagnetic waves, so that the rechargeable battery in the electronic device can be electrically connected to the second sensing electrode layer 120. Reach the effect of being charged. In this way, the electronic device does not need to be separately provided with a charging line for receiving electromagnetic waves. ring.

On the other hand, the touch display structure 100 of the present embodiment further includes at least one third sensing electrode, while the first sensing substrate layer 110 is also formed on the first substrate 130. The layer 118 is disposed in the second region A2 and electrically connected to the conductive pads 116 (illustrated as two third sensing electrode layers 118, but not limited thereto). In the present embodiment, the third sensing electrode layer 118 forms an antenna structure to achieve the effect of transmitting electromagnetic waves. In other words, those who need to achieve specific effects by electromagnetic wave transmission on the electronic device can achieve the desired purpose by coating the corresponding electrode layer on the first substrate 130.

3 is a schematic view showing the assembly of a touch display structure according to another embodiment of the present invention. 4 and FIG. 5 are partial schematic views of the first substrate and the second substrate in the touch display structure of FIG. 3, respectively, to show different portions of the first substrate, and to display different portions of the second substrate. The touch display structure 100 is a GF (glass-film) touch structure. The touch display structure 200 of the present embodiment is GFF (glass-film-film) touch. The structure, that is, the touch display structure 200 includes a flexible first substrate 210 and a second substrate 220, and a first sensing electrode layer 230, a second sensing electrode layer 240, and a configuration disposed on the first substrate 210. The fourth sensing electrode layer 250 and the fifth sensing electrode layer 260 on the second substrate 220, wherein FIG. 3 only shows the location and range of the second sensing electrode layer 240. For detailed patterns, please refer to FIG. 5. As shown in FIG. 4, the first sensing electrode layer 230 is composed of a plurality of first serial electrodes, and the fourth sensing electrode layer 250 is composed of a plurality of second serial electrodes, and the first serial electrode strings are Column direction is different from the second series The serial direction of the electrodes. The first substrate 210 and the second substrate 220 are combined with an interlayer (not shown) in the region where the first sensing electrode layer 230 and the fourth sensing electrode layer 250 are disposed, and are insulated from each other, and the first sensing electrode is allowed to be insulated from each other. The layer 230 and the fourth sensing electrode layer 250 form a touch portion of the touch display structure 200 of the present embodiment.

In addition, as shown in FIG. 5, the second sensing electrode layer 240 and the fifth sensing electrode layer 260 both have a coil profile. Therefore, when the first substrate 210 and the second substrate 220 are folded, the second substrate 220 displays the module. The circuit board 150 is sandwiched between the first substrate 210 and the first sensing electrode layer 250 on the display surface S1 and the first sensing electrode layer 230, and the fifth sensing electrode layer 260 is stacked on the back surface S2. And the second sensing electrode layer 240. In other words, in the GFF-type touch display structure 200 of the present embodiment, the first substrate 210 and the second substrate 220 on the back surface of the display module 140 can be provided with the same induction coil (the second sensing electrode layer 240, the first The fifth sensing electrode layer 260) is used to improve the transmission and reception efficiency of electromagnetic waves.

It is to be noted that the second sensing electrode layer 240 and the fifth sensing electrode layer 260 of the embodiment have a gap V1, respectively, in order to prevent mutual interference between the second sensing electrode layer 240 and the fifth sensing electrode layer 260. V2, and the gaps V1, V2 coincide with each other and in the same direction. In this way, it is ensured that the current directions of the second sensing electrode layer 240 and the fifth sensing electrode layer 260 are consistent with each other (as shown by the arrow in FIG. 5, only the current direction in one state is indicated), that is, The second sensing electrode layer 240 of the coil profile has a current input source and an output source that are identical to the fifth sensing electrode layer 260.

FIG. 6 is a schematic diagram of a configuration on a first substrate in a touch display structure according to another embodiment of the invention. Referring to FIG. 6 and FIG. 2, in the embodiment, the first substrate 330 is also divided into the first area A3 and the second area A4, and the first area A3 is also configured as the touch function as in the foregoing embodiment. The first sensing electrode layer 310. The difference is that the second sensing electrode layer 320 disposed in the second area A4 is an array formed by a plurality of concentric coil units, and each of the concentric coil units has the same and the same gap V3. That is, the present embodiment improves the efficiency of receiving electromagnetic waves by arraying the induction coils.

FIG. 7 is a top plan view of a touch display structure according to another embodiment of the invention. Different from the foregoing embodiment, the first sensing electrode layer 410 and the second sensing electrode layer 420 disposed on the first substrate 430 in this embodiment are respectively formed by a metal mesh, and A substrate 430 is stacked on the display surface S1 of the display module 140. Here, the display module 140 and its display surface S1 are the same as those shown in FIG. 1 , that is, the first substrate 430 of the present embodiment is compared with the first For the substrate 130, no additional foldable portions are added).

In detail, as shown in FIG. 7, the portion of the first substrate 430 disposed on the display surface S1 is divided into a first area A1 and a second area A2, and the first area A1 is divided into a plurality of first sub-areas. A11, A12, A13, A14, and the second area A2 is divided into a plurality of second sub-areas A21, A22, A23, and the first sub-area A11, A12, A13, A14 and the second sub-area A21, A22 A23 is arranged alternately with each other.

Furthermore, the first sensing electrode layers 410 are respectively disposed in the first sub-areas A11, A12, A13, and A14 of the first area A1, and the second sensing electrode layers 420 are respectively configured. The second sub-area A21, A22, and A23 in the second area A2, that is, on the touch structure formed by the metal grid, the first sensing electrode layer 410 in the first area A1 forms a touch. The pattern area is sensed, and the second sensing electrode layer 420 of the second area A2 is used as a dummy pattern area as an effect of visually balancing the first sensing electrode layer 410. Therefore, in this embodiment, the second sensing electrode layer 420, which is originally only used as the dummy pattern region, is coiled and contoured, so that when the first sensing electrode layer 410 of the first region A1 is not activated, it can become electromagnetic waves. Induction coil.

In FIG. 7 , the first sensing electrode layer 410 and the second sensing electrode layer 420 respectively have a plurality of terminals 412 and 422 (terminals) for electrically connecting to the circuit board 150 (shown in FIG. 1 ). The circuit board 150 is driven. Here, the terminals 412, 422 are respectively located on opposite sides of the first substrate 430. In another embodiment, the terminals 412 and 422 can be disposed on the same side of the first substrate 430, and then electrically connected to the circuit board 150 by a flexible circuit board, and the driving is also achieved. Effect.

In summary, in the above embodiment of the present invention, the touch display structure forms a first sensing electrode layer and a second sensing electrode layer in different regions of the first substrate, and the two sensing electrodes are layers. The process is completed in one time, wherein the first sensing electrode layer is used as a touch, and the second sensing electrode layer is formed into a coil outline, so that the touch display structure can be second in addition to the touch function. The sensing electrode layer provides the purpose of transmitting or receiving electromagnetic waves to enable the second sensing electrode layer to function as an inductive coil or antenna for wireless charging.

In addition, the touch display structure can also be applied to different touch structures. In the GFF touch display structure, the flexible first substrate and the second substrate can be respectively provided with the same second sensing electrode. The layer and the fifth sensing electrode layer, and the current input and output directions of the two can be made uniform by the notch structure, thereby avoiding mutual interference. In the touch display structure in which the sensing electrode layer is formed by the metal mesh, the above result can also be achieved by coiling the second sensing electrode layer located in the dummy pattern region. Accordingly, the touch display structure of the present invention can simultaneously form a coiled second sensing electrode layer in the process of performing the first sensing electrode layer, thereby enabling the electronic device to achieve the touch display function by using the touch display structure. The effect of transmitting or receiving electromagnetic waves can be achieved without the need for additional components, and the touch display structure can thus diversify the electrode layers and increase the range of application.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

20‧‧‧ glass cover

30‧‧‧Back cover

100‧‧‧Touch display structure

120‧‧‧Second sensing electrode layer

130‧‧‧First substrate

140‧‧‧ display module

150‧‧‧ boards

S1‧‧‧ display surface

S2‧‧‧Back

Claims (10)

A touch display structure includes: a display module having a display surface; a first substrate, at least a portion of the first substrate is disposed on the display surface, and the first substrate has a first one different from each other a first sensing electrode layer disposed in the first region; and a second sensing electrode layer disposed in the second region, wherein the first sensing electrode layer and the second sensing electrode layer Located on the same surface of the first substrate, and the second sensing electrode layer has at least one coil profile. The touch display structure of claim 1, wherein the first sensing electrode layer and the second sensing electrode layer are formed of a metal mesh. The touch display structure of claim 1, wherein the first sensing electrode layer located in the first area and the second sensing electrode layer located in the second area are stacked on the display surface . The touch display structure of claim 1, wherein the first area comprises a plurality of first sub-areas, the second area comprises a plurality of second sub-areas, the first sub-areas and the The two sub-zones are arranged alternately with each other. The touch display structure of claim 1, wherein the first area forms a touch sensing pattern area, and the second area forms a simulated pattern area with respect to the first area. The touch display structure of claim 1, wherein the first substrate has flexibility, and the first substrate is folded to sandwich the display module, and the first sensing is located in the first region. The electrode pattern is stacked on the display surface, and the second sensing electrode pattern located in the second area is stacked on a back surface of the display module, and the display surface and the back surface are opposite to each other. The touch display structure of claim 6, further comprising a bonding pad disposed in the first region, the conductive pad electrically connected to the first sensing electrode layer and the first Between the two sensing electrode layers. The touch display structure of claim 6, further comprising at least one third sensing electrode layer disposed in the second region and electrically connected to the guiding pad. The touch display structure of claim 6, further comprising: a second substrate having flexibility; a fourth sensing electrode layer disposed on a portion of the second substrate; and a fifth sensing electrode The layer is disposed on another portion of the second substrate, and the fifth sensing electrode layer has at least one coil profile, wherein the second substrate is folded to sandwich the display module and the first substrate to enable the first layer The four sensing electrode patterns are stacked on the display surface and the first sensing electrode layer, and the fifth sensing electrode pattern is stacked on the back surface and the second sensing electrode layer. The touch display structure of claim 9, wherein the second sensing electrode layer and the fifth sensing electrode layer are overlapped with each other, and the pair of gaps are coincident and in the same direction.