TWM447545U - Electromagnetic antenna substrate, 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 transparent conductor and peripheral auxiliary antenna loops made of metal on the transparent substrate.

Description

Electromagnetic induction antenna substrate, electromagnetic input device, 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 using a conductive glass electromagnetic induction circuit.

The touch panel technology that integrates touch technology into the display is an important development trend of today's display technology. Compared with a conventional display that can only provide a display function, a display using a touch panel constitutes a communication interface between a user and a host. That is, while viewing the content displayed on the display, the user can input the information to be input to the host by using the input function of the touch panel. Therefore, the touch panel can completely or at least partially replace the commonly used input devices, such as a keyboard, a mouse, and the like. Currently, touch panel technology has been widely integrated into flat panel displays, such as liquid crystal displays (LCDs), plasma display panels (PDPs), electroluminescence displays, and organic light displays (Organic Light). Emitting Display, OLED) and Electronic Paper Display (EPD).

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 trend of flat panel displays today is mainly light and thin, whether it is a large-sized 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, a first and a second electromagnetic induction circuit layout and a plurality of energy-emitting metal coils. The transparent substrate comprises a visible area and a Surrounding area. The first and second electromagnetic induction loops are arranged on the transparent substrate, and the first and second electromagnetic induction circuits are respectively arranged along the X-axis and the Y-axis, and respectively comprise a plurality of electromagnetic antenna loops arranged in parallel with each other, wherein each electromagnetic antenna loop One of the first ends is connected to a switch, and the second end of one of the electromagnetic antenna loops is grounded. The portion of each electromagnetic antenna loop located in the visible region is a conductive glass electromagnetic antenna loop, and each electromagnetic antenna loop is located in the peripheral region. Some are metal wires. The plurality of energy-emitting metal coils are located on the transparent substrate and around the first and second electromagnetic induction circuit layouts, one end of the energy-emitting metal coil is connected to a selection switch, and the other end of the energy-emitting metal coil is grounded.

Some embodiments of the novel will be described in detail below. However, the present invention may be widely practiced in other embodiments than the following description, 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 is formed on a transparent substrate, such as a glass substrate, by using an electromagnetic induction circuit or an antenna composed of conductive glass and a peripheral independent energy transmitting coil composed of a metal wire by using a deposition, lithography, and etching process. An electromagnetic induction antenna substrate that can be placed in front of the display and that minimizes the effects on the optical characteristics of the display is formed.

Electromagnetic induction antenna substrate used in electromagnetic input technology includes along X and Y The shafts are arranged in a plurality of closely arranged induction coil loops or antennas 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. The electromagnetic induction antenna substrate using the conductive glass electromagnetic induction circuit or antenna is disposed in front of the display with the touch input function to minimize the influence on the optical characteristics of the display. 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 induction coil on the electromagnetic antenna circuit substrate is connected to the switch, and the switch is controlled by the controller circuit The electromagnetic signal is transmitted and received by switching the antenna or the induction coil. 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 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 applied to a passive electromagnetic input technology. Passive electromagnetic input technology uses a batteryless electromagnetic pen, which requires an electromagnetic input device to provide an energy source through the electromagnetic induction antenna substrate. The electromagnetic input device uses a peripheral independent energy transmitting coil composed of a metal wire to emit energy to the batteryless electromagnetic pen.

The first A diagram shows an electromagnetic induction loop layout arranged along the X-axis direction according to an embodiment of the present invention, and the first B diagram is a partial enlarged view of the electromagnetic induction loop layout in the first A diagram. As shown in FIG. A, a plurality of closely arranged induction coil loops or antennas 12 arranged in X are composed of conductive glass, and the conductive glass comprises indium tin oxide or indium tin oxide (ITO). The wire 14 that is connected to the induction coil loop or antenna 12 and is located around the periphery of the electromagnetic induction circuit layout 10 comprises a metal wire comprising a molybdenum aluminum molybdenum wire.

Each of the above-mentioned induction coil loops or antennas 12 arranged along 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 point is connected to a grounding point. Each induction coil The loop or antenna 12 is connected to the switch and the portion connected to the ground point respectively occupies a part of the area of the electromagnetic induction antenna substrate, that is, the area occupied by the wire 14, which is a peripheral area. The area of the substrate where all the induction coil circuits or antennas 12 are located is a detectable area and a visible area. The induction coil circuit or antenna 12 and the wire 14 can be connected by any conductive glass and metal wire connection, for example, the connection structure and manner of the indium tin oxide layer of the thin film transistor and the molybdenum aluminum molybdenum wire.

It is worth noting that the first A diagram shows only the electromagnetic induction loop layout arranged in the X-axis direction in the electromagnetic induction antenna substrate. In an embodiment of the present invention, the opposing and parallel segments of the single inductive loop or antenna 12 are not in the same plane. The metal wire electromagnetic induction loop layout on the printed circuit board, the relatively parallel segments of the single metal induction coil loop 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 inductive loop or antenna 12 are respectively located above and below an insulating layer and are connected through openings in the insulating layer.

The first C diagram shows an electromagnetic induction loop layout arranged along the Y-axis direction according to an embodiment of the present invention, and the first D diagram is a partial enlarged view of the electromagnetic induction loop layout in the first C diagram. As shown in FIG. C, the closely arranged induction coil loops or antennas 22 arranged along the Y are also composed of conductive glass containing indium tin oxide or indium tin oxide. The wire 24, which is connected to the induction coil circuit or antenna 22 and is located around the periphery of the electromagnetic induction circuit layout 20, comprises a metal wire comprising a molybdenum aluminum molybdenum wire.

Each of the induction coil loops or antennas 22 arranged along the Y-axis direction also has two termination points, one of which is connected to a switch and finally connected to the control The circuit, while the other termination point is connected to a ground point. Each of the induction coil circuits or antennas 22 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 24, that is, the peripheral area. The area of the substrate area where all the induction coil circuits or antennas 22 are located is a detectable area and is also a visible area. The inductive coil circuit or antenna 22 and the wire 24 can be connected by any conductive glass and metal wire connection, such as the connection structure and manner of the indium tin oxide layer of the thin film transistor and the molybdenum aluminum molybdenum wire.

The first C diagram shows the electromagnetic induction loop layout arranged in the Y-axis direction in the electromagnetic induction antenna substrate. In an embodiment of the present invention, the opposing and parallel segments of the single inductive loop or antenna 22 are not in the same plane. The metal wire electromagnetic induction loop layout on the printed circuit board, the relatively parallel segments of the single metal induction coil loop 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 inductive loop or antenna 22 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 loop layouts arranged in the X-axis and the Y-axis directions respectively shown in the first A diagram and the first C diagram are not on the same plane. The second figure shows an electromagnetic induction loop layout in accordance with an embodiment of the present invention. As shown in the second figure, the electromagnetic induction circuit layouts respectively arranged along the X-axis and the Y-axis direction are overlapped and formed on a transparent substrate.

The third figure shows an electromagnetic induction loop layout including an energy transmitting coil in accordance with an embodiment of the present invention. As shown in the third figure, the transmitting coil 30 is located around the layout of the electromagnetic induction circuit shown in the second figure, and one of the transmitting coils 30 The termination point is connected to one of the selection circuits 32, the selection circuit 32 is finally connected to the control circuit, and the other termination point of the transmission coil 30 is connected to a ground point. The transmit coil 30 includes a metal wire, such as a molybdenum aluminum molybdenum wire, that can be used to emit energy to a batteryless electromagnetic pen.

In an embodiment of the present invention, in order to form the electromagnetic induction loop layouts shown in the second and third figures, the desired conductive glass induction coils, metal wires, and insulating layers may be sequentially processed using a deposition, lithography, and etching process. Formed on a transparent substrate. In an embodiment of the present invention, the application of the thin film transistor process can form the electromagnetic induction loop layout shown in the second figure, and the metal wire process can be used to form the energy transmitting coil shown in the third figure.

The indium tin oxide 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 indium tin oxide 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 the electromagnetic induction circuit is used. The layout pattern photoresist layer is a mask etched indium tin oxide layer and a metal layer. Since each of the induction coil loops or the relatively parallel segments of the antennas 12 and 22 are located on an insulating layer and under, the etch selectivity between the metal wiring layer and the indium tin oxide layer, the first A diagram and the first C The layout of the electromagnetic induction circuits arranged along the X-axis and the Y-axis, respectively, is not on the same plane, so multiple deposition, photoresist, mask, exposure, development, and etching processes are required to form the second and the first The electromagnetic induction circuit layout and energy transmitting coil shown in the three figures.

The electromagnetic induction antenna substrate of the present invention comprises a transparent substrate, an electromagnetic induction loop layout composed of transparent conductive glass, and a peripheral independent energy transmitting coil composed of metal wires on the transparent substrate. The new electromagnetic sense The antenna substrate can be placed in front of the display and minimizes the effects 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 may be made without departing from the spirit of the invention, and are intended to be included within the scope of the invention.

10‧‧‧Electromagnetic induction loop layout

12‧‧‧Induction coil circuit

14‧‧‧Wire

20‧‧‧Electromagnetic induction circuit layout

22‧‧‧Induction coil circuit

24‧‧‧Wire

30‧‧‧transmitting coil

32‧‧‧Selection circuit

The first A diagram shows an electromagnetic induction loop layout arranged in the X-axis direction according to an embodiment of the present invention.

The first B diagram is a partial enlarged view of the layout of the electromagnetic induction loop in the first A diagram.

The first C diagram shows an electromagnetic induction loop layout arranged along the Y-axis direction in accordance with an embodiment of the present invention.

The first D diagram is a partial enlarged view of the electromagnetic induction loop layout in the first C diagram.

The second figure shows an electromagnetic induction loop layout in accordance with an embodiment of the present invention.

The third figure shows an electromagnetic induction loop layout including an energy transmitting coil in accordance with an embodiment of the present invention.

30‧‧‧transmitting coil

32‧‧‧Selection circuit

Claims (16)

An electromagnetic induction antenna substrate comprises: a transparent substrate, comprising a visible area and a peripheral area; a first and a second electromagnetic induction circuit are arranged on the transparent substrate, wherein the first and the second electromagnetic induction circuit respectively Arranging along the X axis and the Y axis, the first and the second electromagnetic induction circuits respectively comprise: a plurality of electromagnetic antenna circuits arranged in parallel with each other, wherein a first end of each of the electromagnetic antenna circuits is connected to a switch, the electromagnetic One end of the antenna loop is grounded, and a portion of the electromagnetic antenna loop located in the visible region is a conductive glass electromagnetic antenna loop, and a portion of the electromagnetic antenna loop located in the peripheral region is a metal wire; A plurality of energy-emitting metal coils are disposed on the transparent substrate and around the first and second electromagnetic induction circuit layouts. One end of the energy-emitting metal coil is connected to a selection switch, and the other end of the energy-emitting metal coil is grounded. 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 conductive glass comprises indium tin oxide. The electromagnetic induction antenna substrate according to claim 1, wherein the metal wire comprises a molybdenum aluminum molybdenum wire. The electromagnetic induction antenna substrate of claim 1, wherein the energy-emitting metal coil comprises a molybdenum-aluminum-molybdenum coil. An electromagnetic input device comprising: a controller and a signal processing circuit; and an electromagnetic induction antenna substrate, comprising: a transparent substrate, comprising a visible area and a peripheral area; A first and a second electromagnetic induction circuit are arranged on the transparent substrate, and the first and the second electromagnetic induction circuits are respectively arranged along the X axis and the Y axis. The first and the second electromagnetic induction circuits respectively comprise: a plurality of electromagnetic antenna loops arranged in parallel with each other, wherein a first end of each of the electromagnetic antenna loops is connected to a switch for connecting to the signal processing circuit, the switch is controlled by the controller, and the second end of the electromagnetic antenna loop Grounding, a portion of each of the electromagnetic antenna loops located in the visible region is a conductive glass electromagnetic antenna loop, and a portion of each of the electromagnetic antenna loops in the peripheral region is a metal wire; and a plurality of energy-emitting metal coils are located at the On the transparent substrate and around the first and second electromagnetic induction circuit layouts, one end of the energy-emitting metal coil is connected to a selector switch to connect the controller, and the other end of the energy-emitting metal coil is grounded. The electromagnetic input device of claim 6, wherein the transparent substrate comprises a glass substrate. The electromagnetic input device of claim 6, wherein the conductive glass comprises indium tin oxide. The electromagnetic input device of claim 6, wherein the metal wire comprises a molybdenum aluminum molybdenum wire. The electromagnetic input device of claim 6, wherein the energy-emitting metal coil comprises a molybdenum-aluminum-molybdenum coil. A device with touch and writing input functions, comprising: a display with a touch input function; an electromagnetic pen for performing touch and write input functions; and an electromagnetic input device, the electromagnetic input device is disposed before the display ,contain: a controller and a signal processing circuit; and an electromagnetic induction antenna substrate, comprising: a transparent substrate, comprising a visible area and a peripheral area; a first and a second electromagnetic induction circuit layout overlap on the transparent substrate, the The first and the second electromagnetic induction circuits are respectively arranged along the X axis and the Y axis, and the first and the second electromagnetic induction circuits respectively comprise: a plurality of electromagnetic antenna circuits arranged in parallel with each other, wherein each of the electromagnetic antenna circuits The first end is connected to a switch for connecting to the signal processing circuit, the switch is controlled by the controller, and the second end of the electromagnetic antenna loop is grounded, and each part of the electromagnetic antenna loop located in the visible area is electrically conductive a glass electromagnetic antenna loop, wherein each portion of the electromagnetic antenna loop in the peripheral region is a metal wire; and a plurality of energy-emitting metal coils are located on the transparent substrate and the energy emission is performed around the first and second electromagnetic induction circuit layouts One end of the metal coil is connected to a selector switch to connect the controller, and the other end of the energy-emitting metal coil is grounded. The device of claim 11, wherein the display comprises a display having a resistive or capacitive touch input function. The device having the touch and write input function described in claim 11 wherein the device having the touch and write input function comprises a tablet computer or a mobile communication device. A device having a touch and writing input function according to claim 11, wherein the conductive glass comprises indium tin oxide. The device of claim 11, wherein the metal wire comprises a molybdenum aluminum molybdenum wire. The device of claim 11, wherein the energy-emitting metal coil comprises a molybdenum-aluminum-molybdenum coil.