WO2020097996A1 - Mounting and fixing structure for electromagnetic screen, and display - Google Patents

Mounting and fixing structure for electromagnetic screen, and display Download PDF

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Publication number
WO2020097996A1
WO2020097996A1 PCT/CN2018/118361 CN2018118361W WO2020097996A1 WO 2020097996 A1 WO2020097996 A1 WO 2020097996A1 CN 2018118361 W CN2018118361 W CN 2018118361W WO 2020097996 A1 WO2020097996 A1 WO 2020097996A1
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WO
WIPO (PCT)
Prior art keywords
fixing
side wall
plate
cover body
screen assembly
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PCT/CN2018/118361
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French (fr)
Chinese (zh)
Inventor
李远志
邓立明
Original Assignee
深圳市友基技术有限公司
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Priority to CN201811356085.1A priority Critical patent/CN109343256A/en
Priority to CN201811356085.1 priority
Application filed by 深圳市友基技术有限公司 filed Critical 深圳市友基技术有限公司
Publication of WO2020097996A1 publication Critical patent/WO2020097996A1/en

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/133308Support structures for LCD panels, e.g. frames or bezels
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/13338Input devices, e.g. touch panels
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46Fixing elements

Abstract

A mounting and fixing structure for an electromagnetic screen, and a display. The mounting and fixing structure comprises: a cover body (10) having a side wall defining a reserved space; a screen assembly (20) embedded in the reserved space of the cover body (10), an edge side end of the screen assembly (20) abutting against and being in contact with the side wall to limit free movement; an antenna plate (30) stacked and fixed on the back of the screen assembly (20), the cover body (10) being provided with limiting structures (12) abutting against and in contact with edge side ends of the antenna plate (30) to limit free movement; and fixing members (40) detachably provided on the cover body (10) and at least partially pressed to the back of the antenna plate (30). The reserved space formed by providing the side wall on the cover body (10) enables the screen assembly (20) to be embedded. The antenna plate (30) acts as a back plate to be pressed on the back of the screen assembly (20) for fixation, and then the fixing members (40) are used for locking to complete the mounting. The operation is simple, the conventional members such as a middle frame and the back plate are omitted, and the disassembly operation is simplified.

Description

电磁屏安装固定结构及显示器  Electromagnetic screen installation and fixing structure and display The
技术领域Technical field
本发明涉及液晶显示设备技术领域,特别涉及一种电磁屏安装固定结构及显示器。The invention relates to the technical field of liquid crystal display devices, in particular to an electromagnetic screen mounting and fixing structure and a display.
背景技术Background technique
电磁式手写液晶屏是通过电磁笔在操作过程中和屏幕下的天线板产生磁场变化,根据磁场变化大小来确定触屏操作。现有电磁式手写液晶屏中,屏幕组件通常是通过中框1、背板2等构件进行固定并保护,如图1所示,在组装时,天线板等屏幕组件3嵌入中框内并通过背部的背板2固定,当天线板出现异常,需要将整个中框1、背板2进行拆卸,才能进行天线板的更换,该工序必须在无尘车间内完成,更换维修操作繁琐,也容易对屏幕组件造成损坏。The electromagnetic handwriting LCD screen generates a magnetic field change during the operation of the electromagnetic pen and the antenna board under the screen, and the touch screen operation is determined according to the magnitude of the magnetic field change. In the existing electromagnetic handwriting LCD screen, the screen assembly is usually fixed and protected by the middle frame 1, the back plate 2 and other components. As shown in FIG. 1, during assembly, the screen assembly 3 such as the antenna board is embedded in the middle frame and passes The back plate 2 on the back is fixed. When the antenna plate is abnormal, the entire midframe 1 and back plate 2 need to be disassembled to replace the antenna plate. This process must be completed in a dust-free workshop. The replacement and maintenance operations are cumbersome and easy. Damage to screen components.
发明内容Summary of the invention
本发明所要解决的技术问题是提供一种结构简单、拆装方便的电磁屏安装固定结构。The technical problem to be solved by the present invention is to provide an electromagnetic screen installation and fixing structure with simple structure and convenient disassembly and assembly.
为解决上述技术问题所采用的技术方案:一种电磁屏安装固定结构,包括盖体,具有围成预留空间的侧壁;屏幕组件,嵌入在盖体的预留空间内,且屏幕组件边缘侧端与侧壁抵顶接触以限制自由移动;天线板件,层叠固定在屏幕组件背部,在所述盖体上设置与天线板件边缘侧端抵顶接触的限位结构以限制自由移动;以及固定构件,可拆卸式设置在盖体上并至少一部分压向天线板件背部。Technical solutions adopted to solve the above technical problems: an electromagnetic screen mounting and fixing structure, including a cover body, having a side wall surrounding a reserved space; a screen component, embedded in the reserved space of the cover body, and the edge of the screen component The side end is in contact with the side wall to limit free movement; the antenna plate is stacked and fixed on the back of the screen assembly, and a limiting structure that is in contact with the edge side of the antenna plate is provided on the cover to limit free movement; And the fixing member is detachably provided on the cover body and at least a part is pressed toward the back of the antenna board.
优选地,所述限位结构为多个沿侧壁间隔布置,所述固定构件对应连接在各限位结构处。Preferably, the limiting structures are a plurality of spaced apart along the side wall, and the fixing member is correspondingly connected to each limiting structure.
优选地,各所述固定构件通过螺丝连接在各限位结构处。Preferably, each of the fixing members is connected to each limit structure by screws.
优选地,各所述固定构件具有伸出扣压在天线板件边缘侧端背部的压板。Preferably, each of the fixing members has a pressing plate that protrudes and is pressed on the back of the edge side end of the antenna plate.
优选地,各所述限位结构包括方形侧壁,所述固定构件具有嵌入在方形侧壁内的固定板和与固定板相连的压板,所述压板跨过方形侧壁伸出。Preferably, each of the limiting structures includes a square side wall, and the fixing member has a fixing plate embedded in the square side wall and a pressing plate connected to the fixing plate, and the pressing plate extends across the square side wall.
优选地,所述天线板件的面积大于屏幕组件的面积,所述限位结构位于侧壁的外侧。Preferably, the area of the antenna board is larger than the area of the screen assembly, and the limiting structure is located outside the side wall.
为解决上述技术问题所采用的技术方案:一种显示器,包括上述的电磁屏安装固定结构。A technical solution adopted to solve the above technical problem: a display including the above-mentioned electromagnetic screen mounting and fixing structure.
有益效果:此电磁屏安装固定结构及显示器中,通过在盖体设置侧壁形成预留空间使得屏幕组件能够嵌入,天线板件充当背板压覆在屏幕组件背部进行固定,再利用固定构件进行锁定完成安装,操作简便,省去了传统的中框、背板等构件,简化拆卸作业。Beneficial effect: In this electromagnetic screen installation and fixing structure and the display, a side wall is formed on the cover to form a reserved space so that the screen assembly can be embedded, and the antenna plate acts as a back plate to press and fix on the back of the screen assembly, and then use the fixing member The installation is completed by locking, and the operation is simple, eliminating the traditional middle frame, back plate and other components, simplifying the disassembly operation.
附图说明BRIEF DESCRIPTION
下面结合附图和实施例对本发明做进一步的说明;The present invention will be further described below with reference to the drawings and embodiments;
图1为现有技术中的液晶显示屏的结构示意图;1 is a schematic structural diagram of a liquid crystal display screen in the prior art;
图2为本发明实施例中屏幕组件嵌入的结构示意图;FIG. 2 is a schematic structural diagram of embedding a screen component in an embodiment of the present invention;
图3为本发明实施例中天线板件层叠在屏幕组件上的结构示意图;3 is a schematic structural diagram of an antenna board stacked on a screen assembly in an embodiment of the present invention;
图4为本发明实施例中限位结构的局部放大结构示意图;4 is a schematic diagram of a partially enlarged structure of a limit structure in an embodiment of the present invention;
图5为本发明实施例中固定构件的局部放大结构示意图。FIG. 5 is a partially enlarged schematic structural view of a fixing member in an embodiment of the present invention.
图6为本发明实施例中天线板件的背部结构示意图。FIG. 6 is a schematic diagram of the back structure of an antenna plate in an embodiment of the present invention.
具体实施方式detailed description
本部分将详细描述本发明的具体实施例,本发明之较佳实施例在附图中示出,附图的作用在于用图形补充说明书文字部分的描述,使人能够直观地、形象地理解本发明的每个技术特征和整体技术方案,但其不能理解为对本发明保护范围的限制。This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the description with graphics, so that people can intuitively understand Each technical feature and overall technical solution of the invention, but it cannot be understood as a limitation to the protection scope of the present invention.
在本发明的描述中,需要理解的是,涉及到方位描述,例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the description of the orientation is involved, for example, the orientation or positional relationship indicated by up, down, front, back, left, and right is based on the orientation or positional relationship shown in the drawings. In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention.
在本发明的描述中,若干的含义是一个或者多个,多个的含义是两个以上,大于、小于、超过等理解为不包括本数,以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。In the description of the present invention, several meanings are one or more, and multiple meanings are more than two, greater than, less than, exceeding, etc. are understood as excluding the number, and above, below, within, etc. are understood as including the number. If it is described that the first and second are only for the purpose of distinguishing the technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or impliedly indicating the order of the indicated technical features relationship.
本发明的描述中,除非另有明确的限定,设置、安装、连接等词语应做广义理解,所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明中的具体含义。In the description of the present invention, unless otherwise clearly defined, terms such as installation, installation, and connection should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meaning of the above terms in the present invention in conjunction with the specific content of the technical solution.
本发明电磁屏安装固定结构,包括盖体10、屏幕组件20、天线板件30及固定构件40,其中,盖体10为显示器的前盖,盖体10中部具有方形的开口,在盖体10上环绕开口设置侧壁11,侧壁11围闭构成预留空间,供屏幕组件20嵌入,预留空间的大小与屏幕组件20相适应,使得屏幕组件20的边缘侧端都能够与相对应的侧壁11抵顶接触,从而限制屏幕组件20在水平方向自由移动,完成对屏幕组件20的定位,侧壁11形成的预留空间相当于传统的中框结构,能够对屏幕组件20提供固定并起到保护作用。The electromagnetic screen mounting and fixing structure of the present invention includes a cover body 10, a screen assembly 20, an antenna board 30 and a fixing member 40, wherein the cover body 10 is a front cover of a display, the cover body 10 has a square opening in the middle, and the cover body 10 A side wall 11 is provided around the opening, and the side wall 11 encloses to form a reserved space for the screen assembly 20 to embed. The size of the reserved space is adapted to the screen assembly 20, so that the edge side of the screen assembly 20 can correspond to The side wall 11 abuts against contact, thereby restricting the screen assembly 20 from freely moving in the horizontal direction, and completing positioning of the screen assembly 20. The reserved space formed by the side wall 11 is equivalent to the traditional mid-frame structure, and can provide fixation for the screen assembly 20. Play a protective role.
在盖体10上沿着侧壁11的方向间隔排列设置多个限位结构12,限位结构12用于对天线板件30进行定位,具体地,天线板件30层叠固定在屏幕组件20背部,天线板件30的边缘侧端与盖体10上的各限位结构12抵顶接触,从而也限制了天线板件30在水平方向自由移动。限位结构12包括方形侧壁121和设置在方形侧壁121中心的连接螺孔122,限位结构12在上下左右四个方向均有布置,具体数量根据实际情况选择,方形侧壁121顶住天线板件30的边缘侧端,限制天线板件30上下左右四个方向自由移动。A plurality of limiting structures 12 are arranged at intervals on the cover 10 along the direction of the side wall 11. The limiting structures 12 are used for positioning the antenna board 30. Specifically, the antenna boards 30 are stacked and fixed on the back of the screen assembly 20. The edge side end of the antenna plate 30 comes into abutting contact with each of the limiting structures 12 on the cover 10, thereby also restricting the antenna plate 30 from freely moving in the horizontal direction. The limit structure 12 includes a square side wall 121 and a connecting screw hole 122 provided in the center of the square side wall 121. The limit structure 12 is arranged in four directions of up, down, left, and right. The specific number is selected according to the actual situation. The edge side end of the antenna plate 30 restricts the antenna plate 30 from freely moving in four directions of up, down, left, and right.
各限位结构12均位于侧壁11的外侧,并且天线板件30的尺寸大于屏幕组件20的尺寸,从而天线板件30的工作区域比屏幕组件还大,使得天线板件30上的天线能够分布完整,不会受到结构尺寸限制,即使屏幕组件20边缘部分也能具有较好手写性能。传统技术中由于结构设计问题,使得屏幕组件、天线板件都是嵌入在中框内,使得天线板件因尺寸问题工作区域较小,难以达到良好的手写性能。Each limiting structure 12 is located outside the side wall 11, and the size of the antenna plate 30 is larger than the size of the screen assembly 20, so that the working area of the antenna plate 30 is larger than that of the screen assembly, so that the antenna on the antenna plate 30 can The distribution is complete without being limited by the size of the structure, and even the edge part of the screen assembly 20 can have better handwriting performance. In the conventional technology, due to structural design problems, the screen assembly and the antenna board are embedded in the middle frame, so that the antenna board has a small working area due to size problems, and it is difficult to achieve good handwriting performance.
在各限位结构12上可拆卸式连接固定构件40,固定构件40扣压在天线板件30背部,从而对天线板件30固定安装,进而将屏幕组件20固定,天线板件30本身由玻璃纤维材料构成,结构强度高,通过对天线板件30进行加厚处理,能够将屏幕组件20固定在盖体10的预留空间内,其具体厚度大小根据实际情况选择。The fixing member 40 is detachably connected to each limit structure 12, and the fixing member 40 is buckled on the back of the antenna board 30 to fix and install the antenna board 30, thereby fixing the screen assembly 20, and the antenna board 30 itself is made of glass fiber The material composition and the structural strength are high. By thickening the antenna plate 30, the screen assembly 20 can be fixed in the reserved space of the cover body 10. The specific thickness of the screen assembly 20 is selected according to the actual situation.
其中,各固定构件40包括弯折相连形成一体的固定板41和压板42,固定板41嵌入在方形侧壁121内部并通过螺丝43固定,压板42跨过方形侧壁121伸出扣压在天线板件30边缘侧端的背部,通过天线板件30边缘侧端上的各压板42,有效地将天线板件30锁定;而且,通过压板42扣压结构设计,能够避免由于螺丝锁固的力度不同,造成固定空间有所差异。Each fixing member 40 includes a fixing plate 41 and a pressing plate 42 that are bent and connected to form an integrated body. The fixing plate 41 is embedded in the square side wall 121 and fixed by screws 43. The pressing plate 42 extends across the square side wall 121 and is pressed onto the antenna plate The back part of the edge side end of the piece 30 is effectively locked by the pressing plates 42 on the edge side end of the antenna plate piece 30; The fixed space varies.
本发明电磁式手写液晶显示器,包括前述的电磁屏安装固定结构,通过该种安装固定结构,能够有效地简化安装及拆卸过程。The electromagnetic handwriting liquid crystal display of the present invention includes the aforementioned electromagnetic screen mounting and fixing structure, and through this mounting and fixing structure, the process of installation and disassembly can be effectively simplified.

Claims (7)

  1. 一种电磁屏安装固定结构,其特征在于,包括: An electromagnetic screen mounting and fixing structure is characterized by comprising:
    盖体,具有围成预留空间的侧壁;Cover body with side walls surrounding the reserved space;
    屏幕组件,嵌入在盖体的预留空间内,且屏幕组件边缘侧端与侧壁抵顶接触以限制自由移动;The screen component is embedded in the reserved space of the cover, and the edge side of the screen component contacts the side wall to limit free movement;
    天线板件,层叠固定在屏幕组件背部,在所述盖体上设置与天线板件边缘侧端抵顶接触的限位结构以限制自由移动;以及The antenna board is stacked and fixed on the back of the screen assembly, and a limiting structure is provided on the cover body to abut the edge side end of the antenna board to limit free movement; and
    固定构件,可拆卸式设置在盖体上并至少一部分压向天线板件背部。The fixing member is detachably provided on the cover body and at least partly presses against the back of the antenna board.
  2. 根据权利要求1所述的电磁屏安装固定结构,其特征在于:所述限位结构为多个沿侧壁间隔布置,所述固定构件对应连接在各限位结构处。 The electromagnetic screen mounting and fixing structure according to claim 1, wherein the limiting structure is a plurality of spaced apart along the side wall, and the fixing member is correspondingly connected to each limiting structure. The
  3. 根据权利要求2所述的电磁屏安装固定结构,其特征在于:各所述固定构件通过螺丝连接在各限位结构处。 The electromagnetic screen mounting and fixing structure according to claim 2, wherein each of the fixing members is connected to each limit structure by screws.
  4. 根据权利要求2或3所述的电磁屏安装固定结构,其特征在于:各所述固定构件具有伸出扣压在天线板件边缘侧端背部的压板。 The electromagnetic screen mounting and fixing structure according to claim 2 or 3, characterized in that each of the fixing members has a pressing plate that protrudes and buckles on the back of the edge side end of the antenna plate. The
  5. 根据权利要求4所述的电磁屏安装固定结构,其特征在于:各所述限位结构包括方形侧壁,所述固定构件具有嵌入在方形侧壁内的固定板和与固定板相连的压板,所述压板跨过方形侧壁伸出。 The electromagnetic screen mounting and fixing structure according to claim 4, wherein each of the limiting structures includes a square side wall, and the fixing member has a fixing plate embedded in the square side wall and a pressing plate connected to the fixing plate, The pressing plate extends across the square side wall. The
  6. 根据权利要求1所述的电磁屏安装固定结构,其特征在于:所述天线板件的面积大于屏幕组件的面积,所述限位结构位于侧壁的外侧。 The electromagnetic screen mounting and fixing structure according to claim 1, wherein the area of the antenna plate is larger than the area of the screen assembly, and the limiting structure is located outside the side wall. The
  7. 一种显示器,其特征在于:包括权利要求1~7所述的电磁屏固定安装结构。 A display characterized by comprising the fixed installation structure of the electromagnetic screen according to claims 1-7.
PCT/CN2018/118361 2018-11-14 2018-11-30 Mounting and fixing structure for electromagnetic screen, and display WO2020097996A1 (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
CN202210835U (en) * 2011-09-09 2012-05-02 青岛海信电器股份有限公司 Liquid crystal screen fixing device and display device
CN103278965A (en) * 2012-12-26 2013-09-04 上海中航光电子有限公司 Electromagnetic type touch control backlight unit and liquid crystal display device
WO2015028702A1 (en) * 2013-09-02 2015-03-05 Posterfy Oy System and method for interactive distribution of digital content
CN206489551U (en) * 2017-01-18 2017-09-12 深圳优派汉王触控科技有限公司 Electromagnetic touch modular structure and handwriting screen
CN206584336U (en) * 2017-01-12 2017-10-24 深圳优派汉王触控科技有限公司 Electromagnetic touch modular structure and handwriting screen
CN208044248U (en) * 2018-04-12 2018-11-02 广州视源电子科技股份有限公司 A kind of electromagnetic screen mounting structure and display

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202210835U (en) * 2011-09-09 2012-05-02 青岛海信电器股份有限公司 Liquid crystal screen fixing device and display device
CN103278965A (en) * 2012-12-26 2013-09-04 上海中航光电子有限公司 Electromagnetic type touch control backlight unit and liquid crystal display device
WO2015028702A1 (en) * 2013-09-02 2015-03-05 Posterfy Oy System and method for interactive distribution of digital content
CN206584336U (en) * 2017-01-12 2017-10-24 深圳优派汉王触控科技有限公司 Electromagnetic touch modular structure and handwriting screen
CN206489551U (en) * 2017-01-18 2017-09-12 深圳优派汉王触控科技有限公司 Electromagnetic touch modular structure and handwriting screen
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