CN2480920Y

CN2480920Y - Digit board with function of reducing electromagnetic interference

Info

Publication number: CN2480920Y
Application number: CN 01224788
Authority: CN
Inventors: 赵清泉; 陈志安
Original assignee: Tianhan Technology Co ltd
Current assignee: Waltop International Corp
Priority date: 2001-05-31
Filing date: 2001-05-31
Publication date: 2002-03-06
Anticipated expiration: 2011-05-31

Abstract

A digital board with the function of reducing electromagnetic interference, which uses a shielding layer on the surface of the antenna loop, the shielding layer forms a shielding effect on electromagnetic noise, and prevents external electromagnetic wave noise from interfering with the antenna loop of the digital board. Improve the anti-noise interference capability of the digital board.

Description

Tablet with EMI reduction function

本实用新型涉及一种数位板，特别指一种具有降低电磁干扰功能的数位板。The utility model relates to a digital board, in particular to a digital board with the function of reducing electromagnetic interference.

请参阅图1、图2所示，电磁感应式数位板的天线回路1，主要包含有X轴天线11、Y轴天线12、绝缘介质层13及金属隔离层14，其利用X、Y轴天线11、12以阵列均等间距布置成天线回路，来感应电磁笔以计算出其绝对坐标，其工作原理，是利用电磁笔产生电磁场的变化而有磁通量的变化，感应在该数位板上产生电压的变化来计算出其所在位置，当电磁笔15靠近数位板中某一天线回路时，由于电场强度与距离平方成反比，产生电磁场的电磁笔距天线越远时，会使得天线所感应到的电压越微弱，相反的，产生电磁场的电磁笔距天线越近时，会使得天线所感应到的电压越强，故只要让数位板的微处理器逐一循序扫描所有的天线回路，并分析各天线所感应到的电压大小，便可得知电磁笔正位于那一条天线的范围内，而得计算出其绝对坐标。Please refer to Fig. 1 and Fig. 2, the antenna loop 1 of the electromagnetic induction digital board mainly includes the X-axis antenna 11, the Y-axis antenna 12, the insulating medium layer 13 and the metal isolation layer 14, which utilizes the X-axis and Y-axis antennas 11 and 12 are arranged as antenna loops with arrays at equal intervals to induce the electromagnetic pen to calculate its absolute coordinates. Its working principle is to use the electromagnetic pen to generate changes in the electromagnetic field and have changes in magnetic flux, and induce the voltage generated on the digital board. Change to calculate its location, when the electromagnetic pen 15 is close to a certain antenna loop in the tablet, since the electric field strength is inversely proportional to the square of the distance, the farther the electromagnetic pen that generates the electromagnetic field is from the antenna, the more the voltage induced by the antenna will be. On the contrary, the closer the electromagnetic pen that generates the electromagnetic field is to the antenna, the stronger the voltage induced by the antenna will be. Therefore, it is only necessary to let the microprocessor of the tablet scan all the antenna loops one by one and analyze the voltage generated by each antenna. Based on the magnitude of the induced voltage, it can be known that the electromagnetic pen is located within the range of the antenna, and its absolute coordinates can be calculated.

数位板的应用场合，其周围一般伴随着资讯产品，如电脑及其周边设备、电器用品等，而现今资讯产品朝着高速率处理、高功能及无线的方向发展，因此，数位板周围环境的电磁波杂讯干扰将更多且更强，因而影响电磁笔位置的正确计算，如何抑制数位板受外来电磁波杂讯干扰，已成为研究的主要课题。The application occasions of the digital board are generally accompanied by information products, such as computers and their peripheral equipment, electrical appliances, etc., and today's information products are developing in the direction of high-speed processing, high-function and wireless. Therefore, the surrounding environment of the digital board There will be more and stronger electromagnetic wave noise interference, which will affect the correct calculation of the position of the electromagnetic pen. How to suppress the tablet from being interfered by external electromagnetic wave noise has become a major research topic.

本实用新型主要目的是在提供一种具有降低电磁干扰的数位板，利用于天线回路表面布设一层遮蔽层，以遮蔽外来电磁波对天线回路造成的干扰，而具有降低电磁干扰功能。The main purpose of the utility model is to provide a digital tablet with the ability to reduce electromagnetic interference. A shielding layer is arranged on the surface of the antenna loop to shield the interference caused by external electromagnetic waves to the antenna loop, and has the function of reducing electromagnetic interference.

本实用新型提供一种具有降低电磁干扰功能的数位板，其中该数位板天线回路包含X轴天线、Y轴天线、绝缘介质层、金属隔离层，该绝缘介质层布设于该X轴天线、Y轴天线、金属隔离层之间，而该金属隔离层位于底面，其特征是：该天线回路正面上布设有一绝缘介质层及遮蔽层，其中该遮蔽层为网状导体，以对电磁波杂讯形成遮蔽效应，而抑制外来电磁杂讯干扰该数位板。The utility model provides a digital board with the function of reducing electromagnetic interference, wherein the digital board antenna circuit includes an X-axis antenna, a Y-axis antenna, an insulating medium layer, and a metal isolation layer, and the insulating medium layer is arranged on the X-axis antenna, Y-axis antenna, and Y-axis antenna. Between the axial antenna and the metal isolation layer, and the metal isolation layer is located on the bottom surface, it is characterized in that: an insulating medium layer and a shielding layer are arranged on the front of the antenna loop, wherein the shielding layer is a mesh conductor to prevent electromagnetic wave noise from forming The shielding effect suppresses external electromagnetic noise from interfering with the tablet.

以下结合附图和实施例对本实用新型作进一步描述。Below in conjunction with accompanying drawing and embodiment the utility model is described further.

图1是传统数位板天线回路结构的示意图。Fig. 1 is a schematic diagram of a traditional digital board antenna loop structure.

图2是数位板天线回路的X轴天线及Y轴天线的示意图。FIG. 2 is a schematic diagram of the X-axis antenna and the Y-axis antenna of the tablet antenna circuit.

图3是本实用新型数位板天线回路结构的示意图。Fig. 3 is a schematic diagram of the circuit structure of the digital board antenna of the present invention.

图4是本实用新型数位板天线回路遮蔽层的网状结构示意图。Fig. 4 is a schematic diagram of the mesh structure of the digital board antenna circuit shielding layer of the present invention.

图5是本实用新型数位板天线回路的X轴天线(Y轴天线)回路示意图。5 is a schematic diagram of the X-axis antenna (Y-axis antenna) circuit of the digital board antenna circuit of the present invention.

图中：In the picture:

1.天线回路 11.X轴天线1. Antenna loop 11. X-axis antenna

12.Y轴天线 13.绝缘介质层12. Y-axis antenna 13. Insulation layer

14.金属隔离层 15电磁笔14. Metal isolation layer 15 Electromagnetic pen

16.遮蔽层16. Masking layer

请再参阅图1所示，公知数位板的天线回路1其底面布设有一层金属隔离层14(如金属铁板)接地，因此，其感应电磁笔15的电磁场主要由正面感应接收，同理，公知数位板所遭受电磁波的干扰，亦主要来自于正面迎向的电磁波，于此，本实用新型提供一种降低电磁波干扰功能的数位板，其利用的技术手段，请参阅图3所示，于天线回路1表面布设一层绝缘介质层13及遮蔽层16，其中该遮蔽层16为网状布置的导体，以对电磁波杂讯形成遮蔽效应，而抑制外来电磁波杂讯干扰该数位板的天线回路，而具有降低电磁干扰功能。Please refer to Fig. 1 again, the bottom surface of the antenna circuit 1 of the known digital tablet is provided with a layer of metal isolation layer 14 (such as a metal iron plate) for grounding, therefore, the electromagnetic field of its induction electromagnetic pen 15 is mainly received by front induction, in the same way, The interference of electromagnetic waves suffered by known digital boards also mainly comes from the electromagnetic waves facing the front. Here, the utility model provides a digital board with the function of reducing electromagnetic wave interference. The technical means used are shown in Figure 3. An insulating medium layer 13 and a shielding layer 16 are arranged on the surface of the antenna loop 1, wherein the shielding layer 16 is a conductor arranged in a mesh shape to form a shielding effect on electromagnetic wave noise, and suppress external electromagnetic wave noise from interfering with the antenna loop of the tablet , and has the function of reducing electromagnetic interference.

本实用新型网状导体遮蔽层16的较佳实施例，请参阅图4所示，其网状导体形成的图形系为X、Y轴天线11、12所形成的网状天线的图形，即该网状导体系涵盖X、Y轴天线11、12所形成的天线回路，以有效遮蔽电磁波对天线造成的干扰，而未因而妨害电磁笔的电磁场变化所引起磁通量变化的位置侦测；另该遮蔽层16亦可为均匀平铺的导体层取代，其中该导体层具有磁场穿透性，而不会因藉由该导体层的电磁波遮蔽，而无法藉磁通量变化而侦测电磁笔的位置。The preferred embodiment of the utility model mesh conductor shielding layer 16, please refer to shown in Fig. 4, the pattern that its mesh conductor forms is the pattern of the mesh antenna formed by X, Y axis antenna 11,12, namely this The mesh conductor system covers the antenna loop formed by the X and Y-axis antennas 11 and 12 to effectively shield the interference caused by electromagnetic waves to the antenna without hindering the position detection of the magnetic flux change caused by the electromagnetic field change of the electromagnetic pen; The layer 16 can also be replaced by a uniformly tiled conductor layer, wherein the conductor layer has magnetic field penetration, and the position of the electromagnetic pen cannot be detected by the change of the magnetic flux due to the shielding of the electromagnetic wave by the conductor layer.

本实用新型较佳实施例中，其中X、Y轴天线11、12由复数个型区段天线所形成，请参阅图5所示，其说明天线计有12组X1-X12，而每组天线藉由复数个型区段天线31所形成，其中每组天线的型区段天线与之相邻的其它天线所形成的型区段天线31，系分属不同的天线，以分辨出电磁笔系位于天线中何者型区段天线上，如天线X5的二型区段天线31(A、B)，与之相邻的其它天线的型区段天线31，系分属于天线X4、X6及X12、X2，当电磁笔位于天线X5的A位置型区段天线31时，藉由参考其相邻的天线X4、X6所产生的讯号，即可分辨出电磁笔系位于天线X5中A位置的型区段天线上。In a preferred embodiment of the present utility model, wherein the X and Y axis antennas 11, 12 are formed by a plurality of -type section antennas, please refer to shown in Figure 5, which illustrates that the antenna meter has 12 groups X1-X12, and each group The antenna is formed by a plurality of -shaped section antennas 31, wherein the -shaped section antennas 31 formed by the -shaped section antennas of each group of antennas and other adjacent antennas belong to different antennas, so as to distinguish The electromagnetic pen is located on the antenna of which type section antenna, such as the two type section antennas 31 (A, B) of antenna X5, the type section antenna 31 of other antennas adjacent to it belong to Antennas X4, X6 and X12, X2, when the electromagnetic pen is located at position A of antenna X5 (type segment antenna 31), by referring to the signals generated by its adjacent antennas X4, X6, it can be distinguished that the electromagnetic pen is located On the -type segment antenna at position A in antenna X5.

由上所述，本实用新型具有降低电磁干扰功能的数位板实具新颖创作性与方便实用性。From the above, the digital board with the function of reducing electromagnetic interference of the present invention is novel, creative, convenient and practical.

以上所揭示的附图及说明，仅为本实用新型的较佳实施例而已，非为用以限定本实用新型的实施，凡熟悉该项技术的人士其所依本实用新型的精神，所作的变化或修饰，皆应涵盖在本实用新型的专利申请范围内。The drawings and descriptions disclosed above are only preferred embodiments of the present utility model, and are not intended to limit the implementation of the present utility model. Those who are familiar with the technology are based on the spirit of the present utility model. Changes or modifications should be covered within the scope of the patent application of the present utility model.

Claims

1. A tablet with the function of reducing electromagnetic interference is characterized in that an insulating medium layer and a shielding layer are arranged on the front of the antenna circuit of the tablet, wherein the shielding layer is a mesh conductor to form a shield to electromagnetic noise.

2. The digital tablet with the function of reducing electromagnetic interference according to claim 1, characterized in that the shielding layer is a uniformly tiled conductor.

3. The tablet with the function of reducing electromagnetic interference according to claim 1, wherein the pattern formed by the mesh conductor covers the pattern of the mesh antenna loop formed by the X-axis antenna and the Y-axis antenna in the antenna loop.

4. A digital tablet with the function of reducing electromagnetic interference, wherein the digital tablet antenna circuit includes an X-axis antenna, a Y-axis antenna, an insulating medium layer, and a metal isolation layer, and the insulating medium layer is arranged on the X-axis antenna and the Y-axis antenna 1. Between the metal isolation layers, and the metal isolation layer is located on the bottom surface. It is characterized in that: an insulating medium layer and a shielding layer are arranged on the front of the antenna loop, wherein the shielding layer is a mesh conductor to shield electromagnetic noise.

5. The digital tablet with the function of reducing electromagnetic interference according to claim 4, characterized in that the shielding layer is a uniformly tiled conductor.

6. The tablet with the function of reducing electromagnetic interference according to claim 4, wherein the pattern formed by the mesh conductor covers the pattern of the mesh antenna loop formed by the X-axis antenna and the Y-axis antenna in the antenna loop.

7. The tablet with the function of reducing electromagnetic interference according to claim 6, characterized in that the X-axis antenna and the Y-axis antenna are formed by complex groups of -type segment antennas.