TWM448739U - Electromagnetic antenna substrate, substrate of integrating capacitive type touch control and electromagnetic inductive control, electromagnetic input apparatus, and apparatus with touch control and handwriting input functions - Google Patents

Abstract

An electromagnetic antenna substrate is disclosed. The electromagnetic antenna substrate comprises a transparent substrate, an electromagnetic antenna loop layout made of metal on the transparent substrate.

Description

Electromagnetic induction antenna substrate, composite substrate combined with capacitive touch and electromagnetic induction, electromagnetic input device and device with touch and writing input function

The present invention relates to an electromagnetic induction antenna substrate, and more particularly to an electromagnetic induction antenna substrate for a metal wire electromagnetic induction circuit and a transparent substrate.

Depending on the type of contact, such as the user's finger, digital pen or Stylus, and the way the contact point is determined, such as the position or distance of the contact when the contact is operated, touch or input The technology is divided into touch technologies such as Resistive-type, Capacitive-type, Electromagnetic-type, and Infrared-type.

Resistive, capacitive or infrared touch technology can be used for input operations by hand or by any contact, but for writing applications, that is, applications written with a pen, electromagnetic input technology must be used.

The application of electromagnetic handwriting input technology to displays has increased significantly. The electromagnetic handwriting input technology can determine the position of the electromagnetic pen even if the palm is placed on the surface of the writing display, and since the sensing antenna substrate is placed behind the display, the optical characteristics of the display are not affected. Therefore, the electromagnetic handwriting input technology is the best handwriting input technology with the display.

However, the development trend of today's flat panel displays are mainly light and thin. Whether it is a large flat-panel TV or a small-sized electronic paper (EPD) display. Although placing the electromagnetic induction antenna substrate behind the display has the advantage of not affecting the optical characteristics of the display, additional antenna printed circuit boards (PCBs) must be added, so that the weight and cost of the flat display are increased, and there are also display panels in manufacturing. The problem of alignment with the electromagnetic induction antenna substrate or the problem of judging the position of the narrow edge of the display. In view of the above disadvantages with respect to the prior art, the present invention proposes an electromagnetic induction loop antenna substrate applied to an input device, which can be placed in front of the display and minimizes the influence on the optical characteristics of the display.

The purpose of the present invention is to provide an electromagnetic induction loop antenna substrate that can be placed in front of the display and that minimizes the effects on the optical characteristics of the display.

According to the above object, the present invention provides an electromagnetic induction antenna substrate comprising a transparent substrate, and the first and second electromagnetic induction loops are disposed on the transparent substrate. The first electromagnetic induction loop layout includes a plurality of first metal electromagnetic antenna loops arranged parallel to each other along the X axis, wherein the first end of each first metal electromagnetic antenna loop is connected to the first switch, and the first metal electromagnetic antenna loop The two ends are grounded. The second electromagnetic induction loop layout comprises a plurality of second metal electromagnetic antenna loops arranged parallel to each other along the Y axis, wherein the first end of each second metal electromagnetic antenna loop is connected to the second switch, and the second metal electromagnetic antenna loop is The two ends are grounded. The first and second electromagnetic induction loops are arranged to overlap the transparent substrate.

Some embodiments of the novel will be described in detail below. However, except The present invention is also applicable to a wide range of other embodiments, and the scope of the present invention is not limited by the embodiments, which are subject to the scope of the following patents. Furthermore, in order to provide a clearer description and to make the present invention easier to understand, the various parts of the drawings are not drawn according to their relative dimensions, and some dimensions have been exaggerated compared to other related scales; the irrelevant details are not fully drawn. Out, in order to make the schema simple.

The electromagnetic induction circuit layout of the present invention uses an electrode, a lithography, and an etching process to form an electromagnetic induction circuit or an antenna composed of metal wires on a transparent substrate, such as a glass substrate, to form a front surface of the display, and to display the display. The optical properties affect the electromagnetic induction antenna substrate that is minimized.

The electromagnetic induction antenna substrate used in the electromagnetic input technology comprises a plurality of closely arranged induction coil loops or antennas arranged along the X and Y axes to form a sensing plane. The induction coil circuit or the antenna on the electromagnetic induction antenna substrate is used for transmitting electromagnetic wave signals to a position pointing device, and receiving electromagnetic wave signals emitted by the position pointing device. The position pointing device includes an electromagnetic pen having a resonance circuit. The coordinate of the position pointing device on the sensing plane is obtained by calculating the electromagnetic wave signal between the resonant circuit of the position pointing device and the induction coil circuit or the antenna of the electromagnetic induction antenna substrate.

The electromagnetic induction antenna substrate is applied to an electromagnetic input device. The electromagnetic input device is integrated with a display into a device with touch and write input functions, in particular, a display with a resistive-type and capacitive-type touch input function. An electromagnetic induction antenna substrate system using a metal wire electromagnetic induction circuit or an antenna Minimize the effects of the optical characteristics of the display before setting it on a display with touch input. Devices with touch and writing input functions include, but are not limited to, tablets, mobile communication devices, and the like.

The electromagnetic input device further includes a controller and a signal processing circuit in addition to the electromagnetic induction antenna substrate. The signal processing circuit includes a signal amplifier circuit, a filter circuit, a rectifier circuit, a phase detector, and an analog to digital converter. The signal processing circuit is not limited to the above, and various other equivalent changes or modifications may be made without departing from the spirit and scope of the invention. The antenna or the induction coil on the electromagnetic antenna circuit substrate is connected to the switch, and the controller circuit controls the switch to switch the antenna or the induction coil to transmit and receive the electromagnetic signal. The controller circuit uses a frequency generating circuit and a selection circuit switching switch to select an antenna or an induction coil to emit an electromagnetic signal. The electromagnetic wave signal from the antenna or the induction coil causes resonance of a resonance circuit in the electromagnetic pen. When the electromagnetic signal emitted by the antenna or the induction coil is temporarily interrupted, the resonant circuit in the electromagnetic pen sends a response electromagnetic wave signal, which is received by the antenna or the induction coil, and is amplified by the signal amplifying circuit, filtering, rectifying, phase detecting circuit and The analog-to-digital conversion circuit performs signal processing analysis.

In an embodiment of the present invention, the electromagnetic induction antenna substrate is mainly applied to a passive electromagnetic input technology, but is not excluded from being applied to an active electromagnetic input technology. Electromagnetic input device using passive electromagnetic input technology is equipped with batteryless electromagnetic pen, no battery The electromagnetic pen requires an electromagnetic input device to provide an energy source by the electromagnetic induction antenna substrate. The electromagnetic input device can use the induction coil circuit or antenna of the electromagnetic induction antenna substrate to emit energy to the batteryless electromagnetic pen, or use the independent energy transmitting coil around the electromagnetic induction antenna substrate to emit energy to the batteryless electromagnetic pen.

An electromagnetic input device using active electromagnetic input technology is required to be equipped with an electromagnetic pen containing a power source such as a battery. The electromagnetic pen used with the self-supplied power supply can independently send out signals, and the electromagnetic input device using the active electromagnetic input technology does not need to additionally transmit energy to the electromagnetic pen to supply power.

The first figure shows an electromagnetic induction antenna substrate according to an embodiment of the present invention. As shown in the first figure, the electromagnetic induction antenna substrate 10 includes an electromagnetic induction circuit array arranged along the X-axis and the Y-axis direction, and is superposed on a transparent substrate. The electromagnetic induction circuit layouts arranged along the X-axis and Y-axis directions are connected to the control circuit and the grounding point through the wires 13 and 15, respectively, and the details of this portion will be further described below. The area of the substrate area occupied by the electromagnetic induction circuit is a detectable area, which is also a visible area, and the area occupied by the wires 13 and 15 is a peripheral area.

In an embodiment of the present invention, in order to form the electromagnetic induction antenna substrate shown in the first figure, the required metal wire induction coil, the metal wire and the insulating layer are sequentially formed on the transparent substrate by a thin film deposition, lithography and etching process. on. In an embodiment of the present invention, the application of the integrated circuit metal wire or the metal wire process in the thin film transistor forms the electromagnetic induction circuit layout shown in the first figure.

In an embodiment of the present invention, the electromagnetic induction loops arranged along the X-axis direction are arranged by a plurality of closely arranged metal sensing lines arranged along the X-axis direction. The loop circuit or the antenna 16 and the metal wire 13 are composed, and the material of the metal antenna 16 and the metal wire 13 includes molybdenum aluminum molybdenum, but is not limited thereto. The molybdenum-aluminum-molybdenum wire may have a line width of about 0.04 mm, so that the electromagnetic induction loop layout arranged along the X-axis direction will minimize the influence on the optical characteristics of the display.

Each of the metal inductive coil circuits or antennas 16 arranged in the X-axis direction has two terminal points, one of which is connected to a switch and finally connected to the control circuit, and the other terminal is connected to a grounding point. Each of the metal inductive coil loops or antennas 16 connected to the switch and the portion connected to the grounding point respectively occupy a part of the area of the electromagnetic induction antenna substrate, that is, the area occupied by the wires 13, which is a peripheral area. The area of the substrate where all the metal induction coil circuits or antennas 16 are located is a detectable area and a visible area.

In an embodiment of the present invention, the single metal inductive coil loops shown in the first figure or the relatively parallel segments in the antenna 16 are not in the same plane. The wire electromagnetic induction loop layout on the printed circuit board, the opposite and parallel segments of the single induction coil circuit or antenna are respectively located on two sides of the printed circuit board and connected through the through holes penetrating the printed circuit board. In an embodiment of the present invention, the opposing and parallel segments of the single metal inductive coil loop or antenna 16 are respectively located above and below an insulating layer and are connected through openings in the insulating layer.

In an embodiment of the present invention, the electromagnetic induction circuit arrangement arranged along the Y-axis direction is composed of closely arranged metal induction coil circuits or antennas 18 and metal wires 15 arranged in the Y-axis direction, the metal antenna 18 and the metal wires. The material of 15 contains molybdenum aluminum molybdenum, but is not limited thereto. The line width of the molybdenum aluminum molybdenum wire can be about 0.04 mm, so that the electromagnetic induction circuit layout 12 will be on the display The optical properties are minimized.

Each of the metal inductive coil loops or antennas 18 arranged in the Y-axis direction also has two termination points, one of which is connected to a switch and finally to the control circuit, and the other terminal is connected to a ground point. Each of the metal inductive coil loops or antennas 18 connected to the switches and the portions connected to the grounding points respectively occupy a portion of the area of the electromagnetic induction antenna substrate, that is, the area occupied by the wires 15, that is, the peripheral area. The area of the substrate where all the metal induction coil circuits or antennas 18 are located is a detectable area and a visible area.

In an embodiment of the present invention, the opposing and parallel segments of the single metal inductive coil loop or antenna 18 are not in the same plane. The metal wire electromagnetic induction loop layout on the printed circuit board, the opposite and parallel line segments of the single induction coil circuit or the antenna are respectively located on two sides of the printed circuit board, and are connected through the through holes penetrating the printed circuit board. In an embodiment of the present invention, the opposing and parallel segments of the single metal inductive coil loop or antenna 18 are respectively located above and below an insulating layer and are connected through openings in the insulating layer.

The first A is a partial enlarged view of the electromagnetic induction circuit layout arranged on the electromagnetic induction antenna substrate in the X-axis and the Y-axis direction, respectively. As shown in FIG. A, in the visible region of the electromagnetic induction antenna substrate, the electromagnetic induction circuit layouts respectively arranged along the X-axis and the Y-axis direction are respectively arranged by a plurality of closely arranged and partially overlapping metals arranged along the X-axis and the Y-axis. Inductive coil loop or antennas 16 and 18 are formed.

The first B diagram shows the routing or arrangement of metal inductive coil loops or antennas in accordance with an embodiment of the present invention. The first B picture shows the metallic sense The routing or arrangement of the coil loops or antennas 18 is in a closely spaced and partially overlapping manner. The metal inductive coil loop or antenna 16 is also in a similar manner, but in the direction of the X-axis. The arrangement of the metal inductive coil circuit or the antenna shown in FIG. B is only an embodiment and is not limited. Other antenna arrangements may also be applied to the present invention.

In an embodiment of the present invention, the electromagnetic induction loop layouts arranged in the X-axis and Y-axis directions, respectively, shown in the first figure are not on the same plane.

The electromagnetic induction circuit arrangement arranged along the X-axis and the Y-axis direction respectively can form a desired metal induction coil, a metal wire and an insulating layer on the transparent substrate sequentially by using a metal layer and an insulating layer film deposition, lithography and etching process.

The metal layer is first formed on a glass substrate by a chemical or physical vapor deposition process. Then, by using lithography technology, a photoresist layer is formed on the metal layer and the glass substrate, and the electromagnetic induction circuit layout pattern is exposed on the photoresist layer by using a photomask, and the exposed photoresist layer is developed and arranged in an electromagnetic induction circuit layout pattern. The photoresist layer is a mask etched metal layer. Since each of the metal inductive coil loops or the relatively parallel segments of the antennas 16 and 18 are located on an insulating layer and under, the etching selectivity between the metal layer and the insulating layer is respectively arranged along the X-axis and the Y-axis direction. The electromagnetic induction circuit layout is not on the same plane and the like, so multiple metal layer and insulation layer deposition, photoresist, mask, exposure, development and etching processes are required to form the electromagnetic induction antenna substrate shown in the first figure.

In an embodiment of the present invention, the electromagnetic induction antenna substrate 10 can be integrated with a capacitive touch substrate 20 into a device with touch and write input functions. The capacitive touch substrate 20 includes a single layer of projected capacitor The touch substrate is not limited to a single-layer projected capacitive touch substrate. The single-layer projected capacitive touch substrate comprises a transparent substrate, two conductive glass electrode layers for sensing X-axis and Y-axis coordinates, and an insulating layer between the two conductive glass electrode layers. The transparent substrate includes a glass substrate, and the conductive glass electrode includes an indium tin oxide (ITO) electrode. The conductive glass electrode is connected to the signal line and the driving line, and is driven by a multiplexer and a driving element located around the conductive glass electrode layer, and is controlled by the control element.

The second figure shows a schematic diagram of the electromagnetic induction antenna substrate 10 combined with the capacitive touch substrate 20 according to an embodiment of the present invention. The electromagnetic induction antenna substrate 10 and the capacitive touch substrate 20 are coupled through the transparent adhesive layer 24b, and the glass substrate 22 is coupled to the capacitive touch substrate 20 through the transparent adhesive layer 24a to form a combined capacitive touch and Electromagnetic induction composite substrate. The transparent adhesive layers 24a and 24b contain an optical adhesive (Optical Clear Adhesive), but are not limited thereto.

The bonding sequence shown in the second figure is only an embodiment. The glass substrate 22 can also be bonded to the electromagnetic induction antenna substrate 10. The electromagnetic induction antenna substrate 10 is further coupled to the capacitive touch substrate 20 through a transparent adhesive layer.

The electromagnetic induction antenna substrate of the present invention comprises a transparent substrate, and an electromagnetic induction circuit composed of metal wires is arranged on the transparent substrate. The electromagnetic induction antenna substrate of the present invention can be placed in front of the display and minimizes the influence on the optical characteristics of the display.

The embodiments described above are only for explaining the technical idea and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and implement them according to the scope of the patent. Various equivalent changes or modifications without departing from the spirit of the present invention All modifications are intended to be included within the scope of the present invention and are intended to be included within the scope of the following claims.

10‧‧‧Electromagnetic induction circuit substrate

13‧‧‧Wire

15‧‧‧Wire

16‧‧‧Metal induction coil circuit

18‧‧‧Metal induction coil circuit

20‧‧‧Capacitive touch substrate

22‧‧‧ glass substrate

24a‧‧‧Transparent adhesive layer

24b‧‧‧Transparent adhesive layer

The first figure shows an electromagnetic induction antenna substrate according to an embodiment of the present invention.

The first A is a partial enlarged view of the electromagnetic induction circuit layout arranged on the electromagnetic induction antenna substrate in the X-axis and the Y-axis direction, respectively.

The first B diagram shows the routing or arrangement of metal inductive coil loops or antennas in accordance with an embodiment of the present invention.

The second figure is a schematic diagram of a combination of an electromagnetic induction antenna substrate and a capacitive touch substrate according to an embodiment of the present invention.

10‧‧‧Electromagnetic induction circuit substrate

13‧‧‧Wire

15‧‧‧Wire

16‧‧‧Metal induction coil circuit

18‧‧‧Metal induction coil circuit

Claims (20)

An electromagnetic induction antenna substrate comprising: a transparent substrate; a first electromagnetic induction loop layout, the first electromagnetic induction loop layout comprising a plurality of first metal electromagnetic antenna loops arranged parallel to each other along the X axis, wherein each of the first One of the first ends of the metal electromagnetic antenna loop is connected to a first switch, the second end of the first metal electromagnetic antenna loop is grounded, and a second electromagnetic induction loop is arranged, the second electromagnetic induction loop layout includes a plurality of edges a second metal electromagnetic antenna circuit in which the Y axes are arranged in parallel with each other, wherein a first end of each of the second metal electromagnetic antenna circuits is connected to a second switch, and a second end of the second metal electromagnetic antenna circuit is grounded; The first and the second electromagnetic induction loops are arranged to overlap the transparent substrate. The electromagnetic induction antenna substrate according to claim 1, wherein the transparent substrate comprises a glass substrate. The electromagnetic induction antenna substrate according to claim 1, wherein the first and second metal electromagnetic antenna circuits comprise a molybdenum aluminum molybdenum electromagnetic antenna circuit. The electromagnetic induction antenna substrate according to claim 3, wherein the molybdenum aluminum molybdenum electromagnetic antenna circuit has a line width of about 0.04 mm. An electromagnetic input device comprising: a controller and a signal processing circuit; and an electromagnetic induction antenna substrate comprising: a transparent substrate; a first electromagnetic induction loop layout, the first electromagnetic induction loop layout comprising a plurality a first metal electromagnetic antenna loop arranged parallel to each other along the X axis, wherein the first end of each of the first metal electromagnetic antenna loops is connected to a first a switch is connected to the signal processing circuit, the first switch is controlled by the controller, a second end of the first metal electromagnetic antenna loop is grounded; and a second electromagnetic induction loop is disposed on the transparent substrate, the second electromagnetic The inductive loop layout includes a plurality of second metal electromagnetic antenna loops arranged parallel to each other along the Y axis, wherein a first end of each of the second metal electromagnetic antenna loops is connected to a second switch to connect to the signal processing circuit, the first The second switch is controlled by the controller, and the second end of the second metal electromagnetic antenna loop is grounded; wherein the first and the second electromagnetic induction loops are arranged to overlap the transparent substrate. The electromagnetic input device of claim 5, wherein the transparent substrate comprises a glass substrate. The electromagnetic input device of claim 5, wherein the first and second metal electromagnetic antenna circuits comprise a molybdenum aluminum molybdenum electromagnetic antenna circuit. The electromagnetic input device of claim 7, wherein the molybdenum aluminum molybdenum electromagnetic antenna circuit has a line width of about 0.04 mm. A device having a touch and write input function, comprising: a display with a touch input function; an electromagnetic pen for performing touch and write input; and an electromagnetic input device, the electromagnetic input device being disposed in front of the display The invention comprises: a controller and a signal processing circuit; and an electromagnetic induction antenna substrate, comprising: a transparent substrate; a first electromagnetic induction circuit layout, the first electromagnetic induction circuit layout comprises a plurality of parallel rows arranged along the X axis a metal electromagnetic antenna loop, One of the first ends of the first metal electromagnetic antenna loop is connected to a first switch for connecting to the signal processing circuit, the first switch is controlled by the controller, and the second end of the first metal electromagnetic antenna loop Grounding; and a second electromagnetic induction loop layout, the second electromagnetic induction loop layout comprising a plurality of second metal electromagnetic antenna loops arranged parallel to each other along the Y axis, wherein each of the first ends of the second metal electromagnetic antenna loop Connected to a second switch for connecting to the signal processing circuit, the second switch is controlled by the controller, and the second end of the second metal electromagnetic antenna loop is grounded; wherein the first and the second electromagnetic induction loop are overlapped in layout On the transparent substrate. The device of claim 9, wherein the display comprises a display having a resistive or capacitive touch input function. The device of claim 9, wherein the device comprises a tablet computer or a mobile communication device. The device of claim 9, wherein the first and second metal electromagnetic antenna circuits comprise a molybdenum aluminum molybdenum electromagnetic antenna circuit. The device of claim 12, wherein the molybdenum aluminum molybdenum electromagnetic antenna loop has a line width of about 0.04 mm. The device of claim 9, wherein the electromagnetic pen comprises a batteryless electromagnetic pen or a self-powered electromagnetic pen. A composite substrate combining capacitive touch and electromagnetic induction includes: a glass substrate; a capacitive touch substrate; an electromagnetic induction antenna substrate; the electromagnetic induction antenna substrate and the capacitive touch substrate are transparent The adhesive layer is combined, and the electromagnetic induction antenna substrate comprises: a transparent substrate; a first electromagnetic induction loop layout, the first electromagnetic induction loop layout comprising a plurality of first metal electromagnetic antenna loops arranged parallel to each other along the X axis, wherein each of the first metal electromagnetic antenna loops is first The end is connected to a first switch, the second end of the first metal electromagnetic antenna loop is grounded; and a second electromagnetic induction loop layout, the second electromagnetic induction loop layout comprises a plurality of second parallel arranged along the Y axis a metal electromagnetic antenna circuit, wherein a first end of each of the second metal electromagnetic antenna circuits is connected to a second switch, and a second end of the second metal electromagnetic antenna circuit is grounded, wherein the first and the second electromagnetic The sensing circuit is disposed on the transparent substrate; wherein the capacitive touch substrate is located between the glass substrate and the electromagnetic induction antenna substrate, or the electromagnetic induction antenna substrate is located on the glass substrate and the capacitive touch substrate between. The composite substrate of claim 15 , wherein the capacitive touch substrate comprises a single-layer projected capacitive touch substrate. The composite substrate of claim 15, wherein the glass substrate is bonded to the capacitive touch substrate or the electromagnetic induction antenna substrate by a transparent adhesive layer. The composite substrate of claim 15, wherein the electromagnetic induction antenna substrate and the capacitive touch substrate are coupled through a transparent adhesive layer. The composite substrate of claim 15, wherein the first and second metal electromagnetic antenna loops comprise a molybdenum aluminum molybdenum electromagnetic antenna loop. The composite substrate of claim 19, wherein the molybdenum aluminum molybdenum electromagnetic antenna loop has a line width of about 0.04 mm.