TWI441054B - Combined touth apparatus and manufacturing method thereof - Google Patents

Description

Composite touch device and manufacturing method thereof

A touch device and a manufacturing method thereof are particularly related to a composite touch device combining a function of a capacitive touch and a resistive touch and a manufacturing method thereof.

In recent years, the technology of touch panels has gradually matured, and thus various types of touch devices have been widely used in various electronic products. In general, touch panels can be roughly classified into resistive touch panels, capacitive touch panels, and electromagnetic touch panels, and each of these touch panels has different advantages and disadvantages.

The resistive touch panel has the characteristics of being simple in technology and not susceptible to environmental interference. However, since the two conductive layers in the resistive touch panel are not all-glass, the transmittance is generally only about 80% to 85%, so the resistivity of the resistive touch panel is low. In addition, when the resistive touch panel is operated, the contact signals are correctly generated after the upper and lower conductive layers are in contact with each other. Therefore, the user needs to press hard, which is easy to damage the conductive layer and reduce the life of the resistive touch panel.

Compared with resistive touch panels, capacitive touch panels are more convenient. The user can touch the capacitive touch panel with a finger to generate a touch signal, so the capacitive touch panel is not easily worn. However, it is not easy for a user to wear a glove to touch a capacitive touch panel to correctly generate a touch signal.

The present invention provides a composite touch device including a direct touch unit and an indirect touch unit. The direct touch unit is disposed on the outer side, and the indirect touch unit is disposed on the inner side. The direct touch unit includes a base layer, an induction coil layer, a driving circuit layer, a bonding layer and a covering layer. The indirect touch unit includes a first conductive layer, a second conductive layer, and a plurality of spacers between the first conductive layer and the second conductive layer. An optical adhesive layer is disposed between the direct touch unit and the indirect touch unit. The base layer is a conductive film, and a shielding layer is disposed between the conductive film and the optical adhesive layer. The second conductive layer of the indirect touch unit is a thin conductive glass.

The present invention provides a method for fabricating a composite touch device, comprising the steps of: providing a first conductive layer; forming a plurality of spacers and a second conductive layer on the first conductive layer, wherein the second conductive layer The layer is a thin conductive glass; a base layer is provided; and an induction coil layer, a driving circuit layer, a bonding layer and a covering layer are sequentially formed on the base layer, wherein the base layer is a conductive film; and the second conductive layer and the base layer An optical adhesive layer and a shielding layer are respectively formed.

The features and implementations of the present invention are described in detail below with reference to the drawings.

Please refer to FIG. 1 , which is a cross-sectional structural view of the composite touch device of the first embodiment. The composite touch device 100 includes a direct touch unit 110 and an indirect touch unit 120. The direct touch unit 110 is disposed on the outer side to provide direct contact and operation by the user. The indirect touch unit 120 is disposed on the inner side to provide an indirect operation of the user through the direct touch unit 110. In the embodiment, the direct touch unit 110 is a capacitive touch panel, and the indirect touch unit 120 is a resistive touch panel. Therefore, the hybrid touch device 100 has the functions of resistive touch and capacitive touch.

The direct touch unit 110 includes a base layer 111, an induction coil layer 112, a driving circuit layer 113, a bonding layer 114, and a cover layer 115 from the inner side to the outer side, respectively. The base layer 111 can be a conductive film, such as an indium tin oxide film (ITO film), to reduce the thickness of the direct touch unit 110, and when the user operates the indirect touch unit 120 through the direct touch unit 110. The force of the user's touch pressure is reduced, and the force of the touch pressure is effectively transmitted to the indirect touch unit 120. The induction coil layer 112 includes a plurality of spaced apart sensing lines. The driving circuit layer 113 includes a plurality of spaced apart driving lines, and the driving lines are disposed to intersect with the sensing lines and form sensing capacitors at the intersecting nodes. The driving wires and the sensing wires are transparent wires, such as indium tin oxide (ITO). The bonding layer 114 may be an Optically Clear Adhesive (OCA) for bonding the driving circuit layer 113 and the capping layer 115. The cover layer 115 may be glass, which may be subjected to a chemical strengthening treatment such as ion exchange treatment to improve the scratch resistance and compressive strength of the direct touch unit 110.

The indirect touch unit 120 further includes a first conductive layer 121, a second conductive layer 122, and a plurality of spacers 123. The first conductive layer 121 is located inside the indirect touch unit 120. The second conductive layer 122 is located outside the indirect touch unit 120 and corresponds to the base layer 111. The spacer 123 is interposed between the first conductive layer 121 and the second conductive layer 122. The second conductive layer 122 may be a thin conductive glass such as Indium Tin Oxide Glass (ITO Glass), and the thin conductive glass may have a thickness of 0.1 mm. The hardness of the thin conductive glass is greater than the hardness of the ITO film. Therefore, in the case where the user operates (ie, presses) the composite touch device 100 for a long period of time, the chance of distortion and deformation of the second conductive layer 122 can be effectively reduced. The service life of the hybrid touch device 100. The first conductive layer 121 may be a conductive glass, such as indium tin oxide glass, and generates a touch signal when the first conductive layer 121 and the second conductive layer 122 are in contact with each other. The spacer 123 may be an insulator for isolating the first conductive layer 121 and the second conductive layer 122 to avoid a short circuit caused by a touch without causing a malfunction.

In the present embodiment, an optically-adapted (OCA) layer 130 is disposed between the direct touch unit 110 and the indirect touch unit 120 for engaging the direct touch unit 110 and the indirect touch unit 120. The position of the touch coordinates generated by the user will be the same regardless of whether the signal is generated by the direct touch unit 110 or the indirect touch unit 120.

In addition, a shielding layer 140 is disposed between the base layer 111 and the optical adhesive layer 130, for example, a shielding film to block noise generated by the indirect touch unit 120 (eg, electromagnetic interference, etc.). In order to avoid the direct touch unit 110 being interfered by the aforementioned noise, a malfunction occurs. The masking layer 140 may be formed of a metallized wire on a polyethylene terephthalate (PET) substrate. The metal wires therein may be in a lattice shape or an irregular shape. The thicker the metal wire, the lower the light transmittance of the shielding layer 140 and the stronger the anti-electromagnetic interference capability, and the light transmittance of the metal wire layer is increased and the electromagnetic interference resistance is weaker.

Please refer to FIG. 2, which is a cross-sectional structural view of the composite touch device of the second embodiment. In this embodiment, the direct touch unit 110 , the base layer 111 , the induction coil layer 112 , the driving circuit layer 113 , the bonding layer 114 , the cover layer 115 , the indirect touch unit 120 , the first conductive layer 121 , and the second conductive layer 122 . The arrangement relationship and the function of the spacer 123, the optical adhesive layer 130 and the shielding layer 140 can be referred to the description of the first embodiment, and thus will not be described herein. In addition, the hybrid touch device 100 further includes an anti-reflection and anti-glare sheet 150, a retarder 160 and a polarizer 170.

The anti-reflection and anti-glare sheet 150 may be disposed outside the cover layer 115. The retarder 160 may be disposed between the optical adhesive layer 130 and the second conductive layer 122 of the indirect touch unit 120. The polarizer 170 may be disposed between the optical adhesive layer 130 and the retarder 160. The anti-reflection and anti-glare layer 150 may be an inorganic metal oxide material (such as magnesium fluoride, MgF2) and formed by coating, sol coating or nano coating to increase the transmittance of light. The retarder 160 may be a Quarter Wave Plate, and the incident polarized light is rotated by a certain polarization angle by the principle of phase retardation. The polarizer 170 may be an iodine-based polarizer or a dye-based polarizer for penetrating light in a specific vibration direction, such as vertical polarized light, horizontal polarized light, or circularly polarized light, thereby achieving polarization polarization (Polarized). Effect. In this way, by the above configuration, the visibility of the composite touch device 100 under outdoor or large sun can be increased.

Please refer to FIG. 3, which is a circuit block diagram of the composite touch device of the third embodiment. The composite touch device 300 includes a direct touch unit 310, an indirect touch unit 320, and a control unit 330. In this embodiment, the internal structure and functions of the direct touch unit 310 and the indirect touch unit 320 can be referred to the first and second embodiments, and thus are not described herein again. The control unit 330 of the present embodiment is electrically connected to the direct touch unit 310 and the indirect touch unit 320 for selectively driving the direct touch unit 310 and the indirect touch unit 320.

In this embodiment, the control unit 330 can be a physical switch or other components having a switching mechanism. The control unit 330 (ie, the switch) can be electrically connected to a power source (not shown) for selectively supplying power to the direct touch unit 310 and the indirect touch unit 320. The user can switch the control unit 330 to selectively drive the direct touch unit 310 and the indirect touch unit 320 to operate the hybrid touch device 300 according to the needs thereof (ie, whether the user wears gloves). For example, when the user does not wear gloves, the user can switch the control unit 330 to the first position (such as 331 shown in FIG. 3), and the aforementioned power supply only supplies power to the control unit 330. Direct touch unit 310. At this time, the user can generate a touch signal through the direct touch unit 310 (ie, the capacitive touch unit).

On the other hand, when the user wears gloves to operate the hybrid touch device 300, the user can switch the control unit 330 to the second position (such as 332 shown in FIG. 3), and the aforementioned power supply control Unit 330 supplies only power to indirect touch unit 320. At this time, the user can generate a touch signal through the indirect touch unit 320 (ie, the resistive touch unit).

Please refer to FIG. 4, which is a circuit block diagram of the composite touch device of the fourth embodiment. The composite touch device 400 includes a direct touch unit 410, an indirect touch unit 420, and a control unit 430. In the present embodiment, the internal structure of the direct touch unit 410 and the indirect touch unit 420 and the functions thereof can be referred to the first and second embodiments, and thus are not described herein again. The control unit 430 of the present embodiment is electrically connected to the direct touch unit 410 and the indirect touch unit 420 and is disposed on the direct touch unit 410. Moreover, the control unit 430 can selectively drive the direct touch unit 410 and the indirect touch unit 420 according to a pressing stress.

In this embodiment, the control unit 430 can be switched to the direct touch unit 410 or the inter-contact according to the magnitude of the pressing stress, the pressing time according to the pressing stress, or the pressing stress and the pressing time. The control unit 420 generates a touch signal. If the control unit 430 uses the magnitude of the pressing stress as the basis for switching the direct touch unit 410 or the indirect touch unit 420, the user can preset a threshold value of the pressing stress as needed. For example, when the pressing stress of the user is less than the threshold value, the control unit 430 may select to drive the direct touch unit 410; when the pressing stress of the user is greater than the threshold value, the control unit 430 may select to drive the indirect touch unit 420.

In addition, if the control unit 430 presses the stress pressing time as the basis for switching the direct touch unit 410 or the indirect touch unit 420, the user can preset a pressing threshold time according to the demand. For example, when the user presses the composite touch device 400 and the pressing time does not exceed the pressing threshold time (for example, 1 second), the control unit 430 selects to drive the direct touch unit 410; when the user presses the composite touch device 400 and When the pressing time does not exceed the pressing threshold time, the control unit 430 selects to drive the indirect touch unit 420. In addition, if the control unit 430 simultaneously uses the magnitude of the pressing stress and the pressing time as the basis for switching, the control unit 430 drives the indirect touch unit 420 as long as the magnitude of the pressing stress and the pressing time exceed the threshold value. The control unit 430 drives the direct touch unit 410.

According to the description of the first embodiment, a method of fabricating a composite touch device can be summarized. Please refer to FIG. 5, which is a flow chart of the manufacturing method of the composite touch device of the fifth embodiment. First, in step S502, a first conductive layer is provided. In step S504, a plurality of spacers and a second conductive layer are sequentially formed on the first conductive layer, wherein the second conductive layer is a thin conductive glass. The first conductive layer, the plurality of spacers, and the second conductive layer constitute the "indirect touch unit" of the first embodiment, that is, the resistive touch panel. In step S506, a base layer is provided. In step S508, an induction coil layer, a driving circuit layer, a bonding layer and a covering layer are sequentially formed on the base layer, wherein the base layer is a conductive film. The base layer, the induction coil layer, the driving circuit layer, the bonding layer and the cover layer constitute the “direct touch unit” of the first embodiment, that is, the capacitive touch panel. Next, in step S510, an optical adhesive layer and a shielding layer are respectively formed between the second conductive layer and the base layer. Wherein, the thickness of the second conductive layer may be 0.1 mm.

In the present example, the indirect touch unit and the direct touch unit of the first embodiment are separately formed, and finally the optical adhesive layer and the shielding layer are formed between the indirect touch unit and the direct touch unit. However, the indirect touch unit of the first embodiment may be formed first, and then the optical adhesive layer and the shielding layer are sequentially formed, and finally the direct touch unit of the first embodiment is formed on the shielding layer. That is, it can be made according to the following steps. First, a first conductive layer is provided. Then, a plurality of spacers and a second conductive layer are sequentially formed on the first conductive layer, wherein the second conductive layer is a thin conductive glass, that is, the indirect touch unit of the first embodiment is formed. Then, an optical adhesive layer and a shielding layer are sequentially formed on the second conductive layer. Finally, a base layer, an induction coil layer, a driving circuit layer, a bonding layer and a covering layer are formed on the shielding layer, wherein the base layer is a conductive film, that is, the direct touch unit of the first embodiment is formed.

According to the description of the second embodiment, a method of fabricating a composite touch device can be summarized. Please refer to FIG. 6 , which is a flow chart of a method for manufacturing a composite touch device according to a sixth embodiment. First, in the steps S502 to S610 of the embodiment, the indirect touch unit and the direct touch unit of the second embodiment are respectively fabricated, and finally the indirect touch is performed. An optical adhesive layer and a shielding layer are formed between the unit and the direct touch unit. However, the indirect touch unit of the second embodiment may be formed first, and then the optical adhesive layer and the shielding layer are sequentially formed, and finally the direct touch unit of the second embodiment is formed on the shielding layer. Immediately after the step S612 after the step S610, an anti-reflection and anti-glare sheet is formed on the cover layer. In step S614, a retarder is formed between the optical adhesive layer and the second conductive layer. In step S5616, a polarizer is formed between the retardation film and the optical adhesive layer. The second conductive layer may have a thickness of 0.1 mm; the first conductive layer, the plurality of spacers, and the second conductive layer constitute the "indirect touch unit" of the second embodiment, that is, the resistive touch panel; the base layer and the sensing layer The coil layer, the driving circuit layer, the bonding layer and the covering layer constitute the "direct touch unit" of the second embodiment, that is, the capacitive touch panel.

In the present embodiment, an anti-reflection and anti-glare sheet is formed on the cover layer, and a retardation sheet and a polarizer are formed between the optical layer and the second conductive layer. However, it is also possible to form an anti-reflection and anti-glare sheet only on the cover layer, or to form a polarizer only between the optical adhesive layer and the second conductive layer, or only between the optical adhesive layer and the second conductive layer. A retardation film and a polarizer are separately formed. The above-mentioned production methods can increase the visibility of the composite touch device under outdoor or large sun.

In the above embodiments, the touch device has a better configuration and operation performance because the direct touch unit and the indirect control unit are respectively disposed on both sides of the composite touch device, and the base layer of the direct touch unit is made of a conductive film. In place of the conventional conductive glass, the second conductive layer of the indirect touch unit replaces the conventional conductive film with a thin conductive glass, and an optical adhesive layer is disposed between the direct touch unit and the indirect touch unit, and the conductive film and the optical adhesive are disposed. A masking film is disposed between the layers.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

100,300,400. . . Composite touch device

110,310,410. . . Direct touch unit

111. . . Grassroots

112. . . Induction coil layer

113. . . Drive circuit layer

114. . . Bonding layer

115. . . Cover layer

120,320,420. . . Indirect touch unit

121. . . First conductive layer

122. . . Second conductive layer

123. . . Spacer

130. . . Optical adhesive layer

140. . . Masking layer

150. . . Anti-reflection and anti-glare

160. . . Delay slice

170. . . Polarizer

330,430. . . control unit

331. . . First position of the control unit

332. . . Second position of the control unit

Fig. 1 is a cross-sectional structural view of the composite touch device of the first embodiment.

2 is a cross-sectional structural view of the composite touch device of the second embodiment.

Figure 3 is a circuit block diagram of the composite touch device of the third embodiment.

4 is a circuit block diagram of the composite touch device of the fourth embodiment.

FIG. 5 is a flow chart showing a method of fabricating the composite touch device of the fifth embodiment.

FIG. 6 is a flow chart showing a method of fabricating the composite touch device of the sixth embodiment.

100. . . Composite touch device

110. . . Direct touch unit

111. . . Grassroots

112. . . Induction coil layer

113. . . Drive circuit layer

114. . . Bonding layer

115. . . Cover layer

120. . . Indirect touch unit

121. . . First conductive layer

122. . . Second conductive layer

123. . . Spacer

130. . . Optical adhesive layer

140. . . Masking layer

Claims (13)

A composite touch device includes: a direct touch unit, comprising a base layer, an induction coil layer, a driving circuit layer, a bonding layer and a covering layer; and an indirect touch unit comprising a first conductive layer and a a second conductive layer and a plurality of spacers between the first conductive layer and the second conductive layer; and a control unit electrically connected to the direct touch unit and the indirect touch unit for selectively driving the The direct touch unit and the indirect touch unit, and the control unit is a switch; wherein the direct touch unit is disposed on the outer side, the indirect touch unit is disposed on the inner side, and the direct touch unit and the indirect touch unit are An optical adhesive layer is disposed, the base layer is a conductive film, and a shielding layer is disposed between the conductive film and the optical adhesive layer. The second conductive layer of the indirect touch unit is a thin conductive glass. The composite touch device of claim 1, wherein the second conductive layer has a thickness of 0.1 mm. The composite touch device of claim 1, further comprising: an anti-reflection and anti-glare sheet disposed on an outer side of the cover layer; a retarder disposed on the optical adhesive layer and the second Between the conductive layers; and a polarizer disposed between the retarder and the optical adhesive layer. The composite touch device of claim 1, wherein the control unit selectively drives the direct touch unit to contact the first touch unit according to a pressing stress Control unit. The composite touch device of claim 4, wherein the control unit selectively drives the direct touch unit and the indirect touch unit according to the magnitude of the pressing stress. The composite touch device of claim 4, wherein the control unit selectively drives the direct touch unit and the indirect touch unit according to the pressing time of the pressing stress. The composite touch device of claim 4, wherein the control unit selectively drives the direct touch unit and the indirect touch unit according to the magnitude of the pressing stress and the pressing time. A method for fabricating a composite touch device includes: providing a first conductive layer; forming a plurality of spacers and a second conductive layer on the first conductive layer, wherein the second conductive layer is a thin layer Conductive glass; providing a base layer; sequentially forming an induction coil layer, a driving circuit layer, a bonding layer and a covering layer on the substrate, wherein the base layer is a conductive film; and the second conductive layer and the An optical adhesive layer and a shielding layer are respectively formed between the base layers. The method of fabricating a composite touch device according to claim 8, wherein the second conductive layer has a thickness of 0.1 mm. For example, the method for manufacturing the composite touch device described in claim 8 is further The method comprises the steps of: forming an anti-reflection and anti-glare sheet on the cover layer. The method for fabricating a composite touch device according to claim 8, further comprising the step of forming a retarder between the optical adhesive layer and the second conductive layer. The method for fabricating a composite touch device according to claim 11, further comprising the step of forming a polarizer between the retarder and the optical adhesive layer. The method for fabricating a composite touch device according to claim 8, further comprising the step of: forming a polarizer between the optical adhesive layer and the second conductive layer.