TWM530437U - Touch sensor suitable for various styluses - Google Patents

Description

Touch sensor for multiple pen touches

A touch sensor, in particular, a touch sensor suitable for a plurality of pen touches.

In general, there are many types of electronic devices including an input unit for data input and an output unit for data output. A common example of an input unit may be a button button unit, and a common example of an output unit may be a display unit including a liquid crystal display (LCD) module.

Recently, touch screen devices that can perform data input/output (data I/O) and display data at the same position have been developed, thereby effectively reducing the size of electronic devices and providing diverse functions. In such a touch screen device, a transparent touch panel is placed on the liquid crystal display module to simultaneously perform input and output. Touch panels can generally be divided into several categories depending on the physical configuration and mode of operation. For example, a resistive touch panel, a capacitive touch panel, an ultrasonic touch panel, an optical/infrared sensor touch panel, and an electromagnetic touch panel.

In general, the touch panel accepts data input by a user's finger or a touch pen. Compared to the finger, the conventional touch pen only provides a narrower way to touch the object on the screen. However, hybrid touch screen devices have recently been developed, including as an aid A pen-shaped input unit (generally called a stylus) of a sex data input unit. The user can optionally input by means of a stylus. The touch screen device includes a touch panel and an individual sensing unit, and individually uses the data input by the stylus and the data input by the touch panel.

When the stylus is used separately from the data input mode of the touch panel as described above, the general operation mode is electromagnetic induction. That is, the electronic device includes a pen touch panel (generally referred to as a digitizing panel) having a plurality of coils disposed perpendicular to each other. The pen touch panel is respectively disposed on the touch panel and serves as a sensing unit of the stylus, and the stylus includes a resonance circuit. An alternating current (AC) signal is applied to the coil of the sensing pad for operation. When the stylus is adjacent to the display panel of the electronic device, the coil of the pen touch panel adjacent to the stylus forms a magnetic field. The stylus produces a resonant frequency due to resonance with the magnetic field. The control unit of the electronic device detects the resonance frequency, and thus can determine the relevant touch position.

In addition, the author also uses a metal grid instead of a transparent electrode as a sensing electrode. Existing touch sensors usually do not use a metal grid as a sensing electrode, because the cost of the metal grid is cheap, but when the metal is When the grid overlaps with the black matrix of the color filter in parallel, Moire interference fringes are generated, thus affecting the visibility.

However, in order to achieve various functions of writing and touching functions, the existing touch device must separately install a pen touch panel and a touch panel, and must also provide a resonant circuit and a coil and other related components. The higher the cost, the more electromagnetic interference, especially in the trend of thin and light touch devices, which can provide more and more powerful functions. Therefore, it is necessary to provide a function and touch of the Digitizer. Touch sensing of the control panel function In order to make touch devices more and more powerful in the trend of thin and light.

The main purpose of the present invention is to provide a touch sensor suitable for a plurality of pen touches. The touch sensor for a plurality of pen touches includes a touch sensing unit, and the touch sensing unit includes a transparent a light substrate, a first sensing electrode and a second sensing electrode, the transparent substrate includes a visible touch area and a peripheral line area, the peripheral line area is between the edge of the transparent substrate and the visible touch area The first sensing electrode and the second sensing electrode are disposed on opposite sides of the transparent substrate, and the first sensing electrode includes a plurality of first sensing electrodes and a plurality of first metal leads, and the first sensing An electrode is disposed in the visible touch region and extends axially along the first direction. The first metal leads are located in the peripheral circuit region, and the first sensing electrodes are electrically connected to the first sensing electrodes. The first metal lead.

The second sensing electrode includes a plurality of second sensing electrodes and a plurality of second metal leads. The second sensing electrodes are disposed in the visible touch area and extend axially in a second direction. The second metal lead is located in the peripheral circuit region, and the second sensing electrodes are electrically connected to the second metal leads, the first direction is substantially perpendicular to the second direction, and the first sensing electrode is The second sensing electrodes respectively have a plurality of first metal meshes and a plurality of second metal meshes, and the first metal meshes and the second metal meshes are formed by interlacing the upper and lower sides of the transparent substrate a staggered pattern, wherein the first metal mesh and the second metal mesh have a mesh width of less than 3 cm, and the first metal mesh or the second metal mesh At least one of them is composed of at least a plurality of irregular polygons.

In a preferred embodiment of the present invention, the first metal mesh and the second metal mesh have a mesh width of between 1 and 3 cm.

In another preferred embodiment of the present invention, a biometric identification chip is further included. The biometric identification chip is disposed on one side of the transparent substrate and located within the peripheral circuit region; or the biometric identification chip is disposed on a circuit board.

A further preferred embodiment of the present invention further includes a biometric sensing unit disposed on the peripheral line region, the biometric sensing unit including an upper sensing layer and a lower sensing a layer, the upper sensing layer and the lower sensing layer respectively have a plurality of metal sensing grids and a plurality of metal sensing grids, wherein the upper metal sensing grid and the lower metal sensing grid are separated by the transparent substrate Relatively and interlaced, the mesh widths of the upper metal sensing grids and the lower metal sensing grids are between 1.5 and 50 micrometers.

In summary, when the widths of any of the first metal meshes 131A and the second metal meshes 151A are less than 3 cm, the touches of various forms of pens on the market can be used. Because the pen heads of various types of pens are mostly between 1.5 and 2 cm in size, the case provides a grid width of 3 cm wide, which not only enables various forms of pens (including pencils) to be touched or written, but also provides fingers. When the touch medium is used for touch or writing, a touch sensor having a function of a digitizer and a touch panel can be effectively realized, so that the existing touch device only needs to be installed with the touch feeling of the present case. The detector can provide a variety of pen writing and touch functions at the same time, and the problem that the existing touch device must separately install the pen touch panel and the touch panel in order to achieve the above two functions, the technical means of the present invention can be reduced. The structure of one layer (stroke panel or touch panel) can not only save cost but also reduce the thickness and weight of the touch device.

This creation also provides biometric recognition to increase the security of the touch sensor.

10‧‧‧Touch sensing unit

11‧‧‧Transparent substrate

13‧‧‧First sensing electrode

15‧‧‧Second sensing electrode

V‧‧‧Visual touch area

L‧‧‧ surrounding area

131‧‧‧First sensing electrode

133‧‧‧First metal lead

131A‧‧‧First Metal Grid

151‧‧‧Second sensing electrode

153‧‧‧Second metal lead

151A‧‧‧Second metal grid

100‧‧‧Biometric Disc

200‧‧‧Biometric Sensing Unit

201‧‧‧Upper sensing layer

203‧‧‧ under the sensing layer

A‧‧‧Local area

P‧‧‧ staggered pattern

X‧‧‧second direction

Y‧‧‧First direction

The first figure is a schematic diagram of a first embodiment of a touch sensor suitable for a variety of pen touches.

The second A is a schematic enlarged view of the first sensing electrode and its partial area A in the first embodiment of the present invention.

The second B is a schematic enlarged view of the second sensing electrode of the first embodiment of the present invention and its partial area A.

The second C is an enlarged schematic view showing the first sensing electrode and the second sensing electrode forming a staggered pattern in the local area A in the first embodiment of the present invention.

The third A is a schematic enlarged view of the second sensing electrode and its partial area A of the second embodiment of the present invention.

The third B is an enlarged schematic view showing a staggered pattern formed by the first sensing electrode of the second A picture and the second sensing electrode of the third A picture in the local area A.

Figure 4A is a plan view of a third preferred embodiment of the present invention.

Figure 4B is a side elevational view of a third preferred embodiment of the present invention.

The fifth drawing is a side view of the fourth preferred embodiment of the creation.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Referring to the first figure, the present application is applicable to a schematic diagram of a first embodiment of a plurality of pen-touch touch sensors. As shown in the first figure, the touch sensor of the present invention is applicable to a plurality of touch sensors. The touch sensing unit 10 mainly includes a transparent substrate 11 and a first sensing electrode 13 . And a second sensing electrode 15 , the transparent substrate 11 includes a visible touch area V and a The peripheral line area L is between the edge of the transparent substrate 11 and the visible touch area V, and the visible touch area V is a non-edge area of the transparent substrate 11, the peripheral line The area L is an edge area of the transparent substrate 11, that is, the visible touch area V is farther from the edge of the transparent substrate 11 than the peripheral line area L, or the peripheral line area L surrounds the visible touch area V. .

The first sensing electrode 13 and the second sensing electrode 15 are disposed on a first surface and a second surface of the transparent substrate 11. The first surface and the second surface need to correspond to each other, for example, corresponding to each other. The first sensing electrode 13 and the second sensing electrode 15 are corresponding to the visible touch area V, and the first sensing electrode 13 and the second sensing electrode 15 are also disposed in different light transmissive regions. The upper surface or the lower surface of the substrate 11 is bonded together by optical glues (not shown) according to their relative positions. Therefore, the first sensing electrode 13 and the second sensing electrode 15 are only partially or wholly of each other. In the parallel corresponding relative positions, the first sensing electrode 13 and the second sensing electrode 15 are disposed on a single or a plurality of substrates for the purpose of the present invention.

Referring to FIG. 2A, FIG. 2A is an enlarged schematic view of the first sensing electrode and its partial area A according to the first embodiment of the present invention. Referring to FIG. 2B, the second B is a first embodiment of the present invention. The enlarged view of the second sensing electrode and its partial area A, the second C picture, and the second C picture are enlarged views of the first sensing electrode and the second sensing electrode forming a staggered pattern in the local area A of the first embodiment. .

As shown in FIG. 2A, the first sensing electrode 13 includes a plurality of first sensing electrodes 131 and a plurality of first metal leads 133. The first sensing electrodes 131 are disposed in the visible touch area V. The first metal lead 133 is located in the peripheral line region L, and the first sensing electrodes 131 are electrically connected to the first metal leads 133. Waiting for the first sensing electrode 131 and including a plurality of first metal meshes 131A, such as a partial region of the second A-picture Field A is shown.

As shown in FIG. 2B, the second sensing electrode 15 includes a plurality of second sensing electrodes 151 and a plurality of second metal leads 153. The second sensing electrodes 151 are disposed in the visible touch area V. The second metal lead 153 is located in the peripheral line region L, and the second sensing electrodes 151 are electrically connected to the second metal leads 153. The second sensing electrode 151 includes a plurality of second metal meshes 151A. As shown in the partial region A of the second B, the first direction Y is preferably substantially perpendicular to the second direction X, but is not This is limited to this.

As shown in the partial area A of the second C, the first metal mesh 131A and the second metal mesh 151A are vertically opposed to each other and interlaced with each other to form a staggered pattern P. Wherein the width of any one of the first metal mesh 131A and the second metal mesh 151A is less than 3 cm, at least one of the first metal mesh 131A or the second metal mesh 151A One of the first metal meshes 131A and the second metal meshes 151A has a mesh width of between 1 and 3 cm.

The touch sensing unit 10 is a mutual capacitance sensing capacitive sensor or other capacitive sensor with a space sensing function.

The first metal mesh 131A or the second metal mesh 151A is formed by etching a copper foil layer by using a yellow light lithography, and the copper foil layer is plated on the transparent substrate, wherein the first metal mesh The line width of the grid 131A or the second metal grid 151A is between 3 and 7 microns.

The at least one of the first metal mesh 131A or the second metal mesh 151A is composed of at least a plurality of irregular polygons. Preferably, the irregular polygons mainly comprise a plurality of irregular hexagons, as shown in the partial area A of the second A diagram, and the irregularities The hexagons are generally not the same; it should be noted that the above-mentioned irregular polygons are not limited to the irregular hexagons, and are merely illustrative examples, and are not intended to limit the scope of the creation, that is, As long as irregular polygons fall within the scope of this creation, such as irregular triangles, irregular quadrilaterals, irregular pentagons and irregular polygons fall within the scope of this creation.

As shown in the partial area A of the second C diagram, the interlaced pattern P includes at least a complex irregular triangle, a complex irregular quadrangle, a complex irregular hexagon, or any combination of the above.

In a preferred embodiment of the present invention, the irregular polygons mainly comprise a plurality of irregular hexagons and a plurality of irregular pentagons. Referring to FIG. 3A, FIG. 3A is an enlarged schematic view of the second sensing electrode and its partial area A according to the second embodiment of the present invention. Referring to FIG. 3B, the third B is a second A picture of the present invention. The first sensing electrode and the second sensing electrode of the third A-picture form an enlarged schematic view of the staggered pattern in the local area A.

As shown in the third A to the third B, when one of the first metal meshes 131A or the second metal meshes 151A is composed of the irregular polygons, for example, the first When a metal mesh 131A is in the form of the second A-picture, the other one of the first metal mesh 131A or the second metal mesh 151A is a complex regular quadrangle, a complex irregular quadrilateral, and a complex rule six-sided The shape or the complex irregular hexagon is exemplified by a plurality of irregular quadrangles, and the second sensing electrode 15 is a plurality of irregular quadrilaterals as shown in FIG. 3A, and is the first one of the second A-picture. The staggered pattern P formed by the sensing electrode 131A and the second sensing electrode 151A of the third A diagram is shown in FIG.

Referring to FIG. 4A, a plan view of a third preferred embodiment of the present invention, see FIG. 4B, a side view of a third preferred embodiment of the present invention, as shown in FIG. 4A and FIG. The present invention further includes a biometric identification wafer 100, the biometric identification chip The system 100 is disposed on one side of the transparent substrate 11 and located in the peripheral circuit region L. The biometric identification chip 100 is used for identifying the biometric characteristics of the operator, and discriminating whether the operator has the use right. Permissions allow the operator to touch the touch sensor of the creation. Alternatively, the biometric disc 100 is disposed on a circuit board (not shown).

The biometric identification chip 100 is a separate electronic chip, which may be disposed on the transparent substrate 11 or on a separate circuit board.

Referring to FIG. 5, a side view of a fourth preferred embodiment of the present invention includes a biometric sensing unit 200 disposed on the peripheral line region L, the biometric sensing. The unit 200 includes an upper sensing layer 201 and a lower sensing layer 203. The upper sensing layer 201 and the lower sensing layer 203 respectively have a plurality of metal sensing grids and a plurality of metal sensing grids (not shown, as shown in the figure) The metal sensing grid and the second metal sensing grid, the upper metal sensing grid and the lower metal sensing grid are vertically opposed to each other and interlaced with each other through the transparent substrate 11 The grid width of the mesh and the lower metal induction grid are between 1.5 and 50 microns.

In summary, when the widths of any of the first metal meshes 131A and the second metal meshes 151A are less than 3 cm, the touches of various forms of pens on the market can be used. Because the pen heads of various types of pens are mostly between 1.5 and 2 cm in size, the case provides a grid width of 3 cm wide, which not only enables various forms of pens (including pencils) to be touched or written, but also provides fingers. When the touch medium is used for touch or writing, a touch sensor having a function of a digitizer and a touch panel can be effectively realized, so that the existing touch device only needs to be installed with the touch feeling of the present case. The detector can simultaneously provide a variety of pen writing and touch functions, and the existing touch device must be separately provided with a pen touch panel and a touch panel in order to achieve the above two functions. The problem is that the technical means of the present invention can reduce the structure of one layer (stroke panel or touch panel), thereby not only saving cost but also reducing the thickness and weight of the touch device.

In addition, the author also uses a metal grid instead of a transparent electrode as a sensing electrode. Existing touch sensors usually do not use a metal grid as a sensing electrode, because the cost of the metal grid is cheap, but when the metal is When the grid overlaps with the black matrix of the color filter in parallel, Moire interference fringes are generated, thus affecting the visibility.

In order to break through this limitation, the present invention further proposes a metal mesh having an irregular pattern design, and the metal mesh designed by the irregular pattern can avoid parallel overlap with the black matrix of the color filter. Therefore, the Moire interference fringes can be eliminated without affecting the visibility, so that the use of the metal mesh as the sensing electrode not only becomes feasible, but also reduces the cost, and in particular, the metal mesh also provides excellent anti-electromagnetic interference effects.

Furthermore, the creation also provides biometric identification to increase the security of the touch sensor.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧Touch sensing unit

11‧‧‧Transparent substrate

13‧‧‧First sensing electrode

15‧‧‧Second sensing electrode

V‧‧‧Visual touch area

L‧‧‧ surrounding area

X‧‧‧second direction

Y‧‧‧First direction

Claims (10)

A touch sensor suitable for a plurality of pen touches, comprising: a touch sensing unit comprising a transparent substrate, a first sensing electrode and a second sensing electrode, wherein the transparent substrate comprises a visual touch And a peripheral circuit area between the edge of the transparent substrate and the visible touch area, the first sensing electrode and the second sensing electrode are disposed on opposite sides of the transparent substrate, The first sensing electrode includes a plurality of first sensing electrodes and a plurality of first metal leads. The first sensing electrodes are disposed in the visible touch area and extend axially along the first direction. A metal lead is located in the peripheral line region, and the first sensing electrodes are electrically connected to the first metal leads, and the second sensing electrode includes a plurality of second sensing electrodes and a plurality of second metal leads The second sensing electrodes are disposed in the visible touch region and extend axially in a second direction. The second metal leads are located in the peripheral circuit region, and the second sensing electrodes are Electrically connected to the second metal a first direction, the first sensing electrode and the second sensing electrode respectively have a plurality of first metal meshes and a plurality of second metal meshes, and the first metal meshes The second metal mesh is formed by interlacing the light-transmissive substrates vertically and oppositely to form a staggered pattern, wherein the first metal mesh and the second metal mesh have a grid width Below 3 cm, and at least one of the first metal mesh or the second metal mesh is composed of at least a plurality of irregular polygons. The touch sensor for a plurality of pen touches according to the first aspect of the patent application, wherein the mesh width of the first metal mesh and the second metal mesh is between 1 and 3 cm between. The touch sensor is applicable to a plurality of pen touch sensors according to the first aspect of the patent application, wherein the touch sensor is a mutual capacitance sensing capacitive sensor. The touch sensor for a plurality of pen touches according to the first aspect of the patent application, wherein the first metal mesh or the second metal mesh etches the copper foil layer by means of yellow lithography The line width of the first metal mesh or the second metal mesh is between 3 and 7 microns. The touch sensor is applicable to a plurality of pen touches according to the first aspect of the patent application, wherein the irregular polygons mainly comprise a plurality of irregular hexagons. A touch sensor suitable for a plurality of pen touches according to claim 1, wherein the interlaced pattern includes at least a plurality of irregular triangles, a plurality of irregular quadrangles, a plurality of irregular hexagons, or any of the above combination. According to the touch sensor of claim 1, the touch sensor is applicable to a plurality of pen touches, wherein the irregular polygons mainly comprise a plurality of irregular hexagons and a plurality of irregular pentagons. The touch sensor for a plurality of pen touches according to the first aspect of the patent application, further comprising a biometric identification chip disposed on one side of the transparent substrate and located at the periphery Within the line area. The touch sensor is applicable to a plurality of pen touches according to the first aspect of the patent application, wherein the biometric identification chip is further disposed on a circuit board. According to the touch sensor of claim 1, the touch sensor is applicable to a plurality of pen touches, and further includes a biometric sensing unit disposed on the peripheral circuit area, the living creature The feature sensing unit includes an upper sensing layer and a lower sensing layer, wherein the upper sensing layer and the lower sensing layer respectively have a plurality of metal sensing grids and a plurality of metal sensing grids, and the upper metal sensing grids and the lower The metal sensing grid is vertically opposed to each other across the transparent substrate Wrong, the mesh width of the upper metal induction grid and the lower metal induction grid are between 1.5 and 50 microns.