WO2019227959A1

WO2019227959A1 - Electromagnetic touch device and electronic reader

Info

Publication number: WO2019227959A1
Application number: PCT/CN2019/073498
Authority: WO
Inventors: 程超; 李超军
Original assignee: 掌阅科技股份有限公司; 深圳市掌阅科技有限公司
Priority date: 2018-05-31
Filing date: 2019-01-28
Publication date: 2019-12-05
Also published as: CN208335167U

Abstract

An electromagnetic touch device (100) and an electronic reader. The electromagnetic touch device (100) comprises: an electromagnetic screen (110); magnets (120); a magnetostatic shielding structure (130) provided between the magnets (120) and the electromagnetic screen (110), the magnetostatic shielding structure (130) having a high magnetic conductivity so that a magnetostatic shielding is formed at a position where the magnetostatic shielding structure (130) is provided between the magnets (120) and the electromagnetic screen (110).

Description

Electromagnetic touch device and electronic reader

Cross-reference to related applications

This application claims priority from a Chinese patent application filed with the Chinese Patent Office on May 31, 2018, with application number 201820841898.9, and entitled "Electromagnetic Touch Device and Electronic Reader", the entire contents of which are incorporated herein by reference. in.

Technical field

The present disclosure relates to a touch screen, in particular to an electromagnetic touch device, and also to an electronic reader.

Background technique

The electromagnetic touch technology has high positioning accuracy and can obtain the tilt angle and pressure of the electromagnetic pen. Therefore, it is widely used in tablet devices (drawing tablets), handwriting tablets, computers with handwriting functions, mobile phones, electronic readers and other terminal devices. The display screen with the electromagnetic touch technology applied allows the user to draw and write directly on the display screen with an electromagnetic pen, and realizes a "what you see is what you draw" function.

For portable terminal equipment, it can be equipped with a protective cover. For the terminal equipment used in conjunction with the protective cover, a magnet may be provided on the terminal device to attract the protective cover.

However, if a terminal device equipped with an electromagnetic screen uses a magnet to attract the protective cover, the magnet will interfere with the electromagnetic screen and affect the normal operation of the electromagnetic screen.

Summary of the Invention

Based on this, it is necessary to provide an electromagnetic touch device capable of preventing the magnet from interfering with the electromagnetic screen.

An electromagnetic touch device includes: an electromagnetic screen; a magnet; a magnetostatic shielding structure provided between the magnet and the electromagnetic screen, and the magnetostatic shielding structure has a high magnetic permeability, so that a static electricity is provided between the magnet and the electromagnetic screen. The position of the magnetic shield structure forms a magnetostatic shield.

In one embodiment, the magnet is disposed on a side outside the electromagnetic screen.

In one embodiment, the cross-section of the electromagnetic touch device is rectangular, the sides of the two short sides of the rectangle are the upper and lower sides of the electromagnetic touch device, and the sides of the two long sides of the rectangle are The left and right sides of the electromagnetic touch device; the magnets are disposed on the lower side of the electromagnetic touch device.

In one embodiment, the static magnetic shielding structure is a semi-closed structure with an opening, which surrounds the magnet, and the opening faces the front of the electromagnetic touch device.

In one embodiment, the cross section of the magnetostatic shielding structure is C-shaped.

In one embodiment, the magnet includes a first magnet disposed near a left side of the electromagnetic touch device and a second magnet disposed near a right side of the electromagnetic touch device.

In one embodiment, it further includes a first circuit board and an antenna. The first circuit board is disposed between the first magnet and the second magnet, and the antenna is disposed between the second magnet and the lower left corner of the electromagnetic touch device.

In one embodiment, the static magnetic shielding structure is disposed close to the electromagnetic screen at a position close to the magnet.

In one embodiment, the cross-section of the static magnetic shielding structure is “L”, wherein one side of “L” is disposed close to the back of the electromagnetic screen and the other side is disposed close to the side of the electromagnetic screen facing the magnet.

It is also necessary to provide an electronic reader.

An electronic reader includes an electronic ink screen, and further includes the electromagnetic touch device according to any one of the foregoing embodiments.

In the above electromagnetic touch device and electronic reader, a high-permeability magnetostatic shielding structure is provided between the electromagnetic screen and the magnet, so that the magnetic field lines of the magnet magnetic field are distorted at the surface of the magnetostatic shielding structure. The magnetic line density on the side of the electromagnetic screen is greatly reduced, and the magnetic field strength is significantly reduced, thereby achieving the purpose of suppressing magnetic interference.

Overview of the drawings

1 is a rear view of a structure of an electromagnetic touch device in an embodiment;

2 is a side view of a magnetostatic shielding structure provided close to the surface of an electromagnetic screen in an embodiment;

3 is a rear view of the internal structure of the electronic reader in an embodiment;

4 is a cross-sectional view of the electronic reader shown in FIG. 3;

FIG. 5 is a partially enlarged view of FIG. 4.

Preferred embodiments of the present disclosure

In order to make the objectives, technical solutions, and advantages of the disclosure more clear, the disclosure is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein in the specification of the present disclosure is for the purpose of describing specific embodiments only and is not intended to limit the present disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only.

In this solution, a static magnetic shielding structure is provided to the electromagnetic touch device to prevent the magnetic screen (such as a magnet) from interfering with the electromagnetic screen. Specifically, the electromagnetic touch device includes an electromagnetic screen, a magnet, and a magnetostatic shielding structure, and the magnetostatic shielding structure is disposed between the magnet and the electromagnetic screen. The magnetostatic shielding structure has high magnetic permeability, so that the magnetostatic shielding is formed at the position where the magnetostatic shielding structure is provided between the magnet and the electromagnetic screen, so that the magnetic field lines of the magnet magnetic field are distorted at the surface of the magnetostatic shielding structure, and the magnetostatic shielding The magnetic field line density on the electromagnetic screen side of the structure is greatly reduced, and the magnetic field strength is significantly reduced, thereby achieving the purpose of suppressing magnetic interference.

The material of the static magnetic shielding structure may be selected from materials familiar to those skilled in the art, such as iron, iron alloy, etc., which have high magnetic permeability and can form a static magnetic shielding. In one embodiment, the material of the static magnetic shielding structure is a hot-dip galvanized sheet steel; in another embodiment, the static magnetic shielding structure is a tinplate.

The electromagnetic touch device can be applied to terminal devices such as a tablet, a tablet, a computer with a handwriting function, a mobile phone, and an electronic reader. Referring to FIG. 1, a dotted frame is an outer contour of the electromagnetic touch device 100, and the magnet 120 is disposed on a side outside the electromagnetic screen 110.

The magnet 120 is disposed outside the electromagnetic screen 110, and a distance is maintained from the electromagnetic screen 110, which is beneficial to reducing the interference of the magnet 120 on the electromagnetic screen 110. In the embodiment shown in FIG. 1, the magnet 120 is disposed on the lower side of the electromagnetic touch device 100. In other embodiments, the magnet 120 may be disposed on the upper side, the left side, and the right side of the electromagnetic touch device 100. It can be understood that, since the protective cover attracted by the magnet 120 is generally disposed on the front of the electromagnetic screen 110, the magnet 120 disposed on the back of the electromagnetic screen 110 will affect the attracting effect. For the electromagnetic touch device 100 with a display screen, To obtain a better display effect, the magnet 120 is generally not disposed on the front of the electromagnetic screen 110. It should be noted that the terms “upper side”, “lower side”, “left side”, and “right side” used in the present specification and claims refer to the upper, lower, and left sides of the device.

In the embodiment shown in FIG. 1, the cross-section of the electromagnetic touch device 100 is rectangular, and the sides of the two short sides of the rectangle are the upper and lower sides of the electromagnetic touch device 100, respectively. The sides are the left and right sides of the electromagnetic touch device 100, respectively. Since FIG. 1 is a rear view of the structure of the electromagnetic touch device in an embodiment, the left side of FIG. 1 is the right side of the electromagnetic touch device 100, and the right side of FIG. 1 is the left side of the electromagnetic touch device 100. side.

In the embodiment shown in FIG. 1, there are two magnets 120, that is, a first magnet disposed at the lower left outside the electromagnetic screen 110 and a second magnet disposed at the lower right outside the electromagnetic screen 110.

In one embodiment, the static magnetic shielding structure is a semi-closed structure provided with an opening, the opening is facing the front of the electromagnetic touch device 100, and the semi-closed structure surrounds the magnet 120 (except for the opening). Understandably, the magnet 120 must retain sufficient suction for the protective cover. An opening is left in the magnetostatic shielding structure, and a balance can be achieved between the magnetostatic shielding ability and the magnetic force (attraction) of the protective cover provided by the magnet 120. Select a suitable setting position for the magnet 120, supplemented by the opening of the magnetostatic shielding structure facing the front of the electromagnetic touch device 100, so that the opening of the magnetostatic shielding structure can avoid the electromagnetic screen 110, which can better prevent the magnet 120 from The interference of the electromagnetic screen 110 can obtain sufficient suction force for the protective cover.

Through experiments such as simulation analysis, the inventors have proved that setting a static magnetic shielding structure at the position of the electromagnetic screen near the magnet can also effectively prevent the magnet from interfering with the electromagnetic screen. FIG. 2 is a side view of the magnetostatic shielding structure provided close to the surface of the electromagnetic screen in an embodiment. In this embodiment, the cross section of the magnetostatic shielding structure 130 is “L”, in which one side of L is disposed close to the back of the electromagnetic screen 110 and the other side is disposed close to the side of the electromagnetic screen 110 facing the magnet 120 (in the In the embodiment shown in FIG. 2, it is disposed close to the lower side of the electromagnetic screen 110).

Understandably, in one embodiment, the magnetostatic shielding structure may use a semi-closed structure surrounding the magnet 120 and a structure disposed close to the surface of the electromagnetic screen.

The inventor also provides an electronic reader, which includes an electronic ink screen, and further includes an electromagnetic touch device according to any one of the foregoing embodiments.

FIG. 3 is a rear view of the internal structure of the electronic reader in an embodiment. In this embodiment, the electronic reader further includes a first circuit board 240 and an antenna 250. The first circuit board 240 is a small board, which is disposed between the first magnet and the second magnet, and is connected to the main circuit board through a small board holder. The antenna 250 is disposed between the second magnet and the lower left corner of the electromagnetic touch device (since FIG. 3 is a rear view, the right side in the figure is the left side of the electromagnetic touch device).

FIG. 4 is a cross-sectional view of the electronic reader shown in FIG. 3, and FIG. 5 is a partially enlarged view of FIG. 4. In the embodiment shown in FIG. 5, the cross section of the magnetostatic shielding structure 230 is “C” -shaped. In one embodiment, the static magnetic shielding structure 230 is rolled from a 0.3 mm thick hot-dip galvanized steel sheet.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, It should be considered as the scope described in this specification.

The above-mentioned embodiments only express several implementation manners of the present disclosure, and their descriptions are more specific and detailed, but cannot be understood as a limitation on the scope of the disclosed patents. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the appended claims.

Claims

An electromagnetic touch device, comprising:

Electromagnetic screen

magnet;

A magnetostatic shielding structure is provided between the magnet and the electromagnetic screen, and the magnetostatic shielding structure has a high magnetic permeability, so that the magnetostatic shielding structure is formed at a position where the magnetostatic shielding structure is provided between the magnet and the electromagnetic screen. Magnetically shielded.
The electromagnetic touch device according to claim 1, wherein the magnetostatic shielding structure is a semi-closed structure provided with an opening to surround the magnet, and the opening faces the electromagnetic touch device. positive.
The electromagnetic touch device according to claim 2, wherein a cross section of the static magnetic shielding structure is C-shaped.
The electromagnetic touch device according to any one of claims 1-3, wherein the magnet is disposed on a side outside the electromagnetic screen.
The electromagnetic touch device according to claim 4, wherein the cross-section of the electromagnetic touch device is rectangular, and the sides of the two short sides of the rectangle are the upper sides of the electromagnetic touch device, respectively. And the lower side, the sides of the two long sides of the rectangle are the left and right sides of the electromagnetic touch device, respectively; and the magnet is disposed on the lower side of the electromagnetic touch device.
The electromagnetic touch device according to claim 5, wherein the magnet comprises a first magnet provided near a left side of the electromagnetic touch device and a right side provided near the electromagnetic touch device Of the second magnet.
The electromagnetic touch device according to claim 6, further comprising a first circuit board and an antenna, wherein the first circuit board is disposed between the first magnet and the second magnet, and The antenna is disposed between the second magnet and the lower left corner of the electromagnetic touch device.
The electromagnetic touch device according to claim 1, wherein the magnetostatic shielding structure is disposed close to the electromagnetic screen at a position of the electromagnetic screen close to the magnet.
The electromagnetic touch device according to claim 8, wherein the cross section of the static magnetic shielding structure is "L", wherein one side of "L" is arranged close to the back of the electromagnetic screen, and the other The side is arranged close to the side of the electromagnetic screen facing the magnet.
An electronic reader includes an electronic ink screen, further comprising an electromagnetic touch device according to any one of claims 1-9.