WO2021128021A1 - 发声器 - Google Patents

发声器 Download PDF

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Publication number
WO2021128021A1
WO2021128021A1 PCT/CN2019/128035 CN2019128035W WO2021128021A1 WO 2021128021 A1 WO2021128021 A1 WO 2021128021A1 CN 2019128035 W CN2019128035 W CN 2019128035W WO 2021128021 A1 WO2021128021 A1 WO 2021128021A1
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WO
WIPO (PCT)
Prior art keywords
basin frame
sound generator
conductive pins
generator according
inner end
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PCT/CN2019/128035
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English (en)
French (fr)
Inventor
胡洪建
吴树文
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/128035 priority Critical patent/WO2021128021A1/zh
Publication of WO2021128021A1 publication Critical patent/WO2021128021A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the utility model relates to the field of electro-acoustic conversion, in particular to a sound generator.
  • the sound generators used in such equipment tend to be more miniaturized.
  • the coordination of the components in the sound generator is required to be more stable.
  • the sound generator in the related art includes a vibration system and a magnetic circuit system having a basin frame and housed in the basin frame.
  • the magnetic circuit system is used to drive the vibration system to vibrate and produce sound.
  • the vibration system includes a voice coil.
  • the sound generator also includes conductive pins for connecting audio electrical signals to the voice coil.
  • the conductive pins are generally welded on the basin frame.
  • the existing sounder is based on structural design defects, resulting in a small welding surface between the conductive pins and the basin frame, and insufficient welding strength, which causes the connection between the conductive pins and the basin frame to be unstable, and further affects the stability of the electrical signal of the sounder, resulting in the use of the sounder effect.
  • the purpose of the utility model is to provide a sound generator with stable performance.
  • a sound generator including a magnetic circuit system, a vibration system, a basin frame for accommodating the magnetic circuit system and the vibration system, and conductive pins installed on the basin frame ,
  • the conductive pin is provided with an extension part
  • the basin frame is provided with a receiving groove for receiving and installing the extension part.
  • the conductive pin includes a bottom plate and an elastic arm extending from the bottom plate in a direction away from the basin frame; the basin frame is provided with a mounting surface for mounting and connecting the bottom plate, and the extension portion extends from the bottom plate, The receiving groove communicates with the mounting surface.
  • the bottom surface of the receiving groove is coplanar with the mounting surface.
  • the mounting surface is formed by recessing the surface of the basin frame inward.
  • the outer contour of the basin frame is rectangular, including an outer end, an inner end opposite to the outer end, and a receiving cavity surrounded by the inner end; the conductive pins are located at the outer end of the basin frame. Corner; the bottom plate includes a first side adjacent to the outer end of the frame in the short axis direction, a second side adjacent to the outer end of the frame in the long axis direction, and connected to the first side and the second side and A third side close to the inner end; the extension portion extends from the third side to the inner end of the basin frame, and the receiving groove is adjacent to the inner end of the basin frame.
  • the extension portion includes a top end facing the inner end of the basin frame and a side surface opposite to the groove wall of the receiving groove, and a function is formed between the side surface of the extension portion and the groove wall of the receiving groove. Gap clearance for material giving way.
  • the top end of the extension part is separated from the inner end of the basin frame by a certain distance.
  • the conductive pin further includes a limit buckle portion extending from the bottom plate in a direction away from the basin frame, and the limit buckle portion is provided with the elastic arm for inserting and restricting the direction of the elastic arm. A limit opening that pops away from the direction of the basin frame.
  • the sound generator further includes a flexible circuit board that is electrically connected to the conductive pins and embedded in the basin frame;
  • the vibration system includes a side surface that is connected to the basin frame away from the conductive pins A connected diaphragm, and a voice coil connected to the diaphragm and electrically connected to the flexible circuit board;
  • the magnetic circuit system includes a magnetic yoke connected to the other side of the basin close to the conductive pin , The main magnetic steel and the auxiliary magnetic steel fixed on the yoke and forming a magnetic gap, and the voice coil is suspended in the magnetic gap.
  • the sound generator further includes an auxiliary sound film connected to the flexible circuit board.
  • the beneficial effect of the present invention is that the conductive pins are provided with extensions and the basin frame is provided with a receiving groove, so that the conductive pins can be embedded into the basin frame, thereby realizing further welding of the conductive pins and the basin frame.
  • the conductive pin connection is stable, thereby providing the stability of the sound generator.
  • Figure 1 is a schematic diagram of an exploded structure of an embodiment of the utility model
  • Figure 2 is a schematic diagram of the connection structure between the basin frame and the conductive pins in an embodiment of the utility model
  • Fig. 3 is a schematic diagram of an enlarged structure of part A in Fig. 2;
  • Figure 4 is a schematic structural diagram of an embodiment of the utility model
  • Figure 5 is a schematic diagram of an exploded structure of an embodiment of the utility model
  • Fig. 6 is a schematic diagram of the structure of the conductive pin in this embodiment.
  • a sound generator including a basin frame 1, a vibration system 2, a magnetic circuit system 3 and conductive pins 4.
  • the basin frame 1 houses the magnetic circuit system 3 and the vibration system 2;
  • the system 3 is used to drive the vibration system 2 to vibrate, and the vibration system 2 realizes sound generation through vibration.
  • the conductive pins 4 are mounted on the basin frame 1, the conductive pins 4 are provided with an extension 41, and the basin frame 1 is provided with a receiving groove 11 for receiving and installing the extension 41, the receiving groove
  • the bottom surface of 11 and the mounting surface 12 are coplanar, and the conductive pins 4 are embedded in the receiving groove 11 to realize further welding of the conductive pins 5 in the receiving groove 11.
  • the conductive pin 4 includes a bottom plate 42 and an elastic arm 43, the elastic arm 43 extends from the bottom plate 42 in a direction away from the basin frame 1; the basin frame 1 is provided with a mounting connecting the bottom plate 42 On the surface 12, the extension portion 41 extends from the bottom plate 42, the receiving groove 11 communicates with the mounting surface 12, and the mounting surface 12 is formed by the surface of the basin frame 1 recessed inward.
  • the outer contour of the basin frame 1 is rectangular, and includes an outer end 13, an inner end 14, and a receiving cavity 15.
  • the inner end 14 is opposite to the outer end 13, and the receiving cavity 15 is surrounded by the inner end 14. to make;
  • the conductive pin 4 is located at the corner 131 surrounded by the outer end 13 of the basin frame 1;
  • the bottom plate 42 includes a first side 421 adjacent to the outer end 13 in the short axis direction of the basin frame 1, and is adjacent to all The second side 422 of the outer end 13 in the long axis direction of the basin frame 1, and the third side 423 connected to the first side 421 and the second side 422 and close to the inner end 14;
  • the extension 41 Extending from the third side 423 to the inner end 14 of the basin frame, the receiving slot 11 is adjacent to the inner end 14 of the basin frame 1.
  • the extension portion 41 includes a top end 411 and a side surface 412, the top end 411 faces the inner end 13 of the basin frame 1, and the side surface 412 is opposite to the groove wall of the receiving groove 11, and the extension portion 41 A clearance gap 413 for material clearance is formed between the side surface 412 and the wall of the accommodating groove 11.
  • the surface on one side can also form the structural feature of stealing glue in the injection molding process, which can avoid interference and influence on the welding of the flexible circuit board 5 and the conductive pins 4.
  • it when used as a solder accommodating space, it can also ensure that enough solder is used as a connecting material to ensure that the soldering is sufficiently firm.
  • the top end 411 of the extension portion 41 is separated from the inner end 14 of the basin frame 1 by a certain distance.
  • a space is provided for the side close to the side of the suspension end, and this space has the same effect as the clearance gap 413.
  • the receiving groove 111 may be a through groove in specific implementation to adapt to the extension portions 41 of different lengths, and to avoid interference of other structures.
  • the conductive pin 4 further includes a position-limiting buckle portion 44 that extends from the bottom plate in a direction away from the basin frame 1, and the elastic arm 43 serves as an elastic connector of the conductive pin 4 Accordingly, in order to satisfy the movable cooperation of the elastic arm 43, a limit buckle 44 is provided to buckle the elastic arm.
  • the limiting buckle 44 is provided with a limiting opening 441 for the elastic arm to insert and restrict the elastic arm from ejecting away from the basin frame.
  • the sound generator further includes a flexible circuit board 5, the flexible circuit board 5 is electrically connected to the conductive pins 4, and the flexible circuit board 5 is embedded in the basin frame 1;
  • the vibration system 2 includes a diaphragm 21 and a voice coil 22.
  • the diaphragm 21 is connected to a side of the basin frame 1 away from the conductive pins 4, and the voice coil 22 is connected to the diaphragm. 21 is connected, and the voice coil 22 is electrically connected to the flexible circuit board 50;
  • the magnetic circuit system 3 includes a yoke 31, a main magnet 32 and an auxiliary magnet 33, the yoke 31 and the basin
  • the frame 1 is close to the yoke 31 connected to the other side of the conductive pin 4.
  • the main magnet 32 and the auxiliary magnet 33 are fixed on the yoke 31 to form a magnetic gap 34, and the voice coil 22 is suspended It is placed in the magnetic gap 34.
  • the voice coil 21 is an important part of the vibration system 2 to realize sound generation, and it needs to be connected to the conductive pins 4 through the flexible circuit board 5 to realize power on.
  • the flexible circuit board 5 is glued and fixed to the basin frame 1, so that the conductive pins 4 and the flexible circuit board 5 are closer in structure.
  • the accommodating slot 11 is used to embed the conductive pins 4 into the interior thereof and to be close to the flexible circuit board 5 at the same time.
  • the conductive pins 4 are embedded into the interior of the accommodating slot 11, and the bottom surface and even the side of the accommodating slot 11 are actually used as a new welding surface between the conductive pins 4 and the basin frame 1, which provides more Connecting the force point improves the welding strength of the conductive pin 4 and ensures the stability of its connection.
  • the sound generator further includes an auxiliary sound membrane 6 connected to the flexible circuit board 5, and the auxiliary sound membrane 6 is used to assist the diaphragm 21 to improve the acoustic quality of the generator.
  • the utility model is provided with an extension part of the conductive pins and a receiving groove on the basin frame, so that the conductive pins are embedded into the basin frame, so that the conductive pins and the basin frame are further welded to improve the conductive pins and the basin frame.
  • the strength of the overall connection between the conductive pins is stable, thereby providing the stability of the sound generator

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本实用新型提供了一种发声器，包括磁路系统、振动系统、收容所述磁路系统和振动系统的盆架、安装在所述盆架上的导电插脚，其特征在于，所述导电插脚设有延伸部，所述盆架上设有用于容纳安装所述延伸部的收容槽，以实现导电插脚嵌设进入盆架内，从而实现导电插脚与盆架进一步焊接，以提高导电插脚与盆架之间的整体连接的强度，导电插脚连接稳定，从而提供发声器的稳定性。

Description

发声器 技术领域
本实用新型涉及电声转换领域，尤其涉及一种发声器。
背景技术
为适应各种音响设备与信息通信设备的小型化、多功能化发展，该类设备中所使用的发声器更加趋于小型化。要求发声器中的各元件的配合更加稳定。
相关技术中的发声器包括具有盆架和收容于于盆架的振动系统和磁路系统。磁路系统用于驱动振动系统振动发声，振动系统包括音圈。发声器还包括为音圈接入音频电信号的导电插脚。该导电插脚一般焊接在盆架上。而现有的发声器基于结构设计缺陷，造成导电插脚与盆架焊接面小，焊接强度不够，进而造成导电插脚与盆架连接不稳定，进而通过影响发声器电信号的稳定造成了发声器使用效果。
因此，有必要提供一种新的发声器，来解决上述技术问题。
技术问题
本实用新型的目的在于提供一种性能稳定的发声器。
问题的解决方案
技术解决方案
为了达到上述目的，本实用新型提供的技术方案如下：一种发声器，包括磁路系统、振动系统、收容所述磁路系统和振动系统的盆架、安装在所述盆架上的导电插脚，所述导电插脚设有延伸部，所述盆架上设有用于容纳安装所述延伸部的收容槽。
上述技术方案中，所述导电插脚包括底板和自底板向远离所述盆架方向延伸的弹性臂；所述盆架设有安装连接所述底板的安装面，所述延伸部自底板延伸而出，所述收容槽与所述安装面相通。
上述技术方案中，所述收容槽的底面与所述安装面共面。
上述技术方案中，所述安装面由所述盆架表面向内凹陷形成。
上述技术方案中，所述盆架的外轮廓为长方形，包括外侧端、与外侧端相对的内侧端和由内侧端围绕而成的收容腔；所述导电插脚位于所述盆架外侧端围绕的角部；所述底板包括临近所述盆架短轴方向外侧端的第一侧边，临近所述盆架长轴方向外侧端的第二侧边，以及与第一侧边和第二侧边相连且靠近所述内侧端的第三侧边；所述延伸部自第三侧边向所述盆架内侧端延伸，所述收容槽临近所述盆架的内侧端。
上述技术方案中，所述延伸部包括朝向所述盆架内侧端的顶端和与所述收容槽的槽壁相对的侧面，所述延伸部的侧面与所述收容槽的槽壁之间形成有用于材料让位的让位间隙。
上述技术方案中，所述延伸部的顶端与所述盆架的内侧端间隔一段距离。
上述技术方案中，所述导电插脚还包括自底板向远离所述盆架方向延伸而出的限位扣部，所述限位扣部设有用于所述弹性臂插入并限制所述弹性臂向远离所述盆架方向弹出的限位口。
上述技术方案中，所述发声器还包括有与所述导电插脚电性相连并嵌入所述盆架内的柔性电路板；所述振动系统包括与所述盆架远离所述导电插脚的一侧面相连的振膜，和与所述振膜相连并与所述柔性电路板电性相连的音圈；所述磁路系统包括与所述盆架靠近所述导电插脚的另一侧面相连的磁轭、固定于所述磁轭之上并形成磁间隙的主磁钢和副磁钢，所述音圈悬置于所述磁间隙内。
上述技术方案中，所述发声器还包括有与所述柔性电路板相连的辅助音膜。
发明的有益效果
有益效果
与现有技术相比，本实用新型的有益效果在于：导电插脚设有延伸部以及盆架上设有收容槽，以实现导电插脚嵌设进入盆架内，从而实现导电插脚与盆架进一步焊接，以提高导电插脚与盆架之间的整体连接的强度，导电插脚连接稳定，从而提供发声器的稳定性。
对附图的简要说明
附图说明
图1为本实用新型一实施例的分解结构示意图；
图2为本实用新型一实施例中盆架与导电插脚的连接结构示意图；
图3为图2中A部分的放大结构示意图；
图4为本实用新型一实施例的结构示意图；
图5为本实用新型一实施例的分解结构示意图；
图6本实施例中导电插脚的结构示意图。
实施该发明的最佳实施例
本发明的最佳实施方式
下面结合附图和实施方式对本实用新型作进一步说明。
请参考图1-图6，一种发声器，包括盆架1、振动系统2、磁路系统3和导电插脚4，所述盆架1收容所述磁路系统3和振动系统2；磁路系统3用于驱动振动系统2振动，振动系统2通过振动实现发声。所述导电插脚4安装在所述盆架1上，所述导电插脚4设有延伸部41，所述盆架1上设有用于容纳安装所述延伸部41的收容槽11，所述收容槽11的底面与所述安装面12共面，导电插脚4嵌入收容槽11内以在该收容槽11内实现导电插脚5进一步焊接。
更优地，所述导电插脚4包括底板42和弹性臂43，所述弹性臂43自底板42向远离所述盆架1方向延伸；所述盆架1设有安装连接所述底板42的安装面12，所述延伸部41自底板42延伸而出，所述收容槽11与所述安装面12相通，所述安装面12由所述盆架1表面向内凹陷形成。
更优地，所述盆架1的外轮廓为长方形，包括外侧端13、内侧端14、收容腔15，所述内侧端14与外侧端13相对，所述收容腔15由内侧端14围绕而成；
更优地，所述导电插脚4位于所述盆架1外侧端13围绕的角部131；所述底板42包括临近所述盆架1短轴方向外侧端13的第一侧边421，临近所述盆架1长轴方向外侧端13的第二侧边422，以及与第一侧边421和第二侧边422相连且靠近所述内侧端14的第三侧边423；所述延伸部41自第三侧边423向所述盆架内侧端14延伸，所述收容槽11临近所述盆架1的内侧端14。
更优地，所述延伸部41包括顶端411和侧面412，所述顶端411朝向所述盆架1内 侧端13，所述侧面412与所述收容槽11的槽壁相对，所述延伸部41的侧面412与所述收容槽11的槽壁之间形成有用于材料让位的让位间隙413，通过形成让位间隙413可以作为焊接焊料的容纳空间避免焊料进入到延伸部靠近柔性电路板5一侧的表面，也可以在注塑工艺中形成偷胶的结构特征，可以避免对柔性电路板5和导电插脚4的焊接造成干涉和影响。另外在作为焊料容纳空间时，也可以保证足够的焊料作为连接材料使用，以保证焊接足够牢固。
更优地，所述延伸部41的顶端411与所述盆架1的内侧端14间隔一段距离。利用收容槽11自身的空间，为靠近悬置端侧面一侧提供了一个空间，该空间具有与让位间隙413相同的效果。同时，收容槽111在具体实施时可以为通槽，以适配不同长度的延伸部41，也可以避免其他结构干涉。
更优地，所述导电插脚4还包括限位扣部44，所述限位扣部44自底板向远离所述盆架1方向延伸而出，弹性臂43作为导电插脚4的弹性插接件，相应地为了满足弹性臂43活动配合，设置有限位扣部44来扣住弹性臂。所述限位扣部44设有限位口441，所述限位口441用于所述弹性臂插入并限制所述弹性臂向远离所述盆架方向弹出。
更优地，所述发声器还包括柔性电路板5，所述柔性电路板5与所述导电插脚4电性相连，且所述柔性电路板5嵌入所述盆架1内；
更优地，所述振动系统2包括振膜21和音圈22，所述振膜21与所述盆架1远离所述导电插脚4的一侧面相连，所述音圈22和与所述振膜21相连，且所述音圈22与所述柔性电路板50电性相连；所述磁路系统3包括磁轭31、主磁钢32和副磁钢33，所述磁轭31与所述盆架1靠近所述导电插脚4的另一侧面相连的磁轭31，所述主磁钢32和副磁钢33固定于所述磁轭31之上并形成磁间隙34，所述音圈22悬置于所述磁间隙34内。
更优地，所述音圈21是振动系统2实现发声的重要部件，需要通过柔性线路板5连接到导电插脚4来实现通电。柔性线路板5胶合固定到盆架1，在结构上使得导电插脚4与柔性线路板5靠得更近。收容槽11的设置用于将导电插脚4嵌设进入到其内部，同时靠近柔性线路板5。导电插脚4嵌设进入到收容槽11的内部，在结构上实际实现了利用收容槽11的底面甚至侧面作为导电插脚4与盆架1之间新增 的焊接面，也就是提供了更多的连接着力部位，提高了导电插脚4的焊接强度，保证其连接的稳定性。
更优地，所述发声器还包括辅助音膜6，所述辅助音膜6与所述柔性电路板5相连，所述辅助音膜6用于辅助振膜21提升发生器的声学质量。
藉此，本实用新型通过导电插脚设有延伸部以及盆架上设有收容槽，以实现导电插脚嵌设进入盆架内，从而实现导电插脚与盆架进一步焊接，以提高导电插脚与盆架之间的整体连接的强度，导电插脚连接稳定，从而提供发声器的稳定性
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (10)

  1. 一种发声器，包括磁路系统、振动系统、收容所述磁路系统和振动系统的盆架、安装在所述盆架上的导电插脚，其特征在于，所述导电插脚设有延伸部，所述盆架上设有用于容纳安装所述延伸部的收容槽。
  2. 根据权利要求1所述的发声器，其特征在于：所述导电插脚包括底板和自底板向远离所述盆架方向延伸的弹性臂；所述盆架设有安装连接所述底板的安装面，所述延伸部自底板延伸而出，所述收容槽与所述安装面相通。
  3. 根据权利要求2所述的发声器，其特征在于，所述收容槽的底面与所述安装面共面。
  4. 根据权利要求2所述的发声器，其特征在于：所述安装面由所述盆架表面向内凹陷形成。
  5. 根据权利要求1-4任意一项所述的发声器，其特征在于：所述盆架的外轮廓为长方形，包括外侧端、与外侧端相对的内侧端和由内侧端围绕而成的收容腔；所述导电插脚位于所述盆架外侧端围绕的角部；所述底板包括临近所述盆架短轴方向外侧端的第一侧边，临近所述盆架长轴方向外侧端的第二侧边，以及与第一侧边和第二侧边相连且靠近所述内侧端的第三侧边；所述延伸部自第三侧边向所述盆架内侧端延伸，所述收容槽临近所述盆架的内侧端。
  6. 根据权利要求5所述的发声器，其特征在于：所述延伸部包括朝向所述盆架内侧端的顶端和与所述收容槽的槽壁相对的侧面，所述延伸部的侧面与所述收容槽的槽壁之间形成有用于材料让位的让位间隙。
  7. 根据权利要求5所述的发声器，其特征在于：所述延伸部的顶端与所述盆架的内侧端间隔一段距离。
  8. 根据权利要求2所述的发声器，其特征在于：所述导电插脚还包括 自底板向远离所述盆架方向延伸而出的限位扣部，所述限位扣部设有用于所述弹性臂插入并限制所述弹性臂向远离所述盆架方向弹出的限位口。
  9. 根据权利要求1所述的一种发声器，其特征在于，所述发声器还包括有与所述导电插脚电性相连并嵌入所述盆架内的柔性电路板；
    所述振动系统包括与所述盆架远离所述导电插脚的一侧面相连的振膜，和与所述振膜相连并与所述柔性电路板电性相连的音圈；
    所述磁路系统包括与所述盆架靠近所述导电插脚的另一侧面相连的磁轭、固定于所述磁轭之上并形成磁间隙的主磁钢和副磁钢，所述音圈悬置于所述磁间隙内。
  10. 根据权利要求9所述的发声器，其特征在于：所述发声器还包括有与所述柔性电路板相连的辅助音膜。
PCT/CN2019/128035 2019-12-24 2019-12-24 发声器 WO2021128021A1 (zh)

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CN201282551Y (zh) * 2008-09-05 2009-07-29 瑞声声学科技(常州)有限公司 微型发声器
CN101626535A (zh) * 2009-08-17 2010-01-13 瑞声声学科技(深圳)有限公司 发声器
CN201489938U (zh) * 2009-08-19 2010-05-26 常州美欧电子有限公司 磁路系统及使用该磁路系统的微型发声器
US20180192187A1 (en) * 2016-12-30 2018-07-05 Sonion Nederland B.V. Circuit and a receiver comprising the circuit
US20190310684A1 (en) * 2017-07-03 2019-10-10 Lg Display Co., Ltd. Display apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201282551Y (zh) * 2008-09-05 2009-07-29 瑞声声学科技(常州)有限公司 微型发声器
CN101626535A (zh) * 2009-08-17 2010-01-13 瑞声声学科技(深圳)有限公司 发声器
CN201489938U (zh) * 2009-08-19 2010-05-26 常州美欧电子有限公司 磁路系统及使用该磁路系统的微型发声器
US20180192187A1 (en) * 2016-12-30 2018-07-05 Sonion Nederland B.V. Circuit and a receiver comprising the circuit
US20190310684A1 (en) * 2017-07-03 2019-10-10 Lg Display Co., Ltd. Display apparatus

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