WO2019062695A1 - 显示装置及其接地装置 - Google Patents

显示装置及其接地装置 Download PDF

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Publication number
WO2019062695A1
WO2019062695A1 PCT/CN2018/107258 CN2018107258W WO2019062695A1 WO 2019062695 A1 WO2019062695 A1 WO 2019062695A1 CN 2018107258 W CN2018107258 W CN 2018107258W WO 2019062695 A1 WO2019062695 A1 WO 2019062695A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
printed circuit
conductive film
frame
display panel
Prior art date
Application number
PCT/CN2018/107258
Other languages
English (en)
French (fr)
Inventor
单剑锋
Original Assignee
惠科股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 惠科股份有限公司 filed Critical 惠科股份有限公司
Publication of WO2019062695A1 publication Critical patent/WO2019062695A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F1/00—Devices 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
    • G02F1/01—Devices 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 
    • G02F1/13—Devices 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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136204—Arrangements to prevent high voltage or static electricity failures
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL 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
    • G02F2202/00—Materials and properties
    • G02F2202/22—Antistatic materials or arrangements

Definitions

  • Embodiments of the present application relate to display devices, and in particular, to a display device and a grounding device thereof.
  • the display device is currently the most popular type of display, and its advantages of being light, thin, power-saving, and easy to miniaturize, so that its traces can be seen everywhere in daily life, such as mobile phones, notebook computers, digital camcorders, tablet computers, etc. Most of the products use display devices.
  • the display device with the highest usage rate belongs to a thin film transistor type display device (TFT-LCD).
  • display devices are non-self-illuminating displays that require additional backlighting.
  • a specific signal is converted and outputted through a driving circuit in the display device, and the voltage is switched to change the alignment direction of the liquid crystal molecules of the display panel.
  • the light generated by the backlight passes through the panel to form a pixel, and the light transmittance of each pixel is reflected to form a display screen.
  • the external noise, electric charge or electric field changes easily interfere with the arrangement of the liquid crystal molecules, causing an abnormality in the displayed image. Therefore, in order to prevent the above interference, the printed circuit board which must be provided with the driving circuit must be shielded from external influences, and during the isolation, it is tried not to interfere with the signal transmitted by itself due to the inability to exclude the accumulated electric charge of the printed circuit board itself.
  • Typical display devices include metal frames, frames, display panels, and printed circuit boards.
  • the prior art provides a ground terminal on the side of the printed circuit board adjacent to the metal frame, and a grounding spring is disposed to electrically connect the ground terminal to the metal frame.
  • the grounding elastic piece is fixed on the metal outer frame by another screw, and the electric charge accumulated on the printed circuit board is transferred to the metal outer frame through the grounding elastic piece and released into the external environment.
  • the metal frame is simultaneously connected to the display panel, and the accumulated charge still has a great chance to interfere with the arrangement of the liquid crystal molecules through the contact with the display panel. Therefore, there is still room for improvement.
  • the technical problem to be solved by the embodiments of the present application is to provide a display device that reduces interference of external noise, electric charge or electric field on the arrangement of liquid crystal molecules.
  • a further technical problem to be solved by the embodiments of the present application is to provide a grounding device for the above display device, which reduces interference of external noise, electric charge or electric field on the arrangement of liquid crystal molecules.
  • a display device including: a display panel; a frame formed of an insulating material, and the display panel is disposed on the frame; the metal side frame is disposed on the frame a top side protection frame, disposed on the frame and the display panel, is made of an insulating material, wherein the top side protection frame has a hollow area exposing the display panel, and the hollow area is smaller than the display panel; the printed circuit board is disposed at The underside of the frame does not contact the metal side frame, and is electrically connected to the display panel through the flexible flat cable; the conductive film is attached and electrically connected to the ground end of the printed circuit board and the metal side frame; and the protective layer is insulated
  • the material is formed on the printed circuit board and attached to the periphery of the printed circuit board through an adhesive material to fix the printed circuit board and extends to cover and fix the flexible flat cable.
  • the ground terminal is disposed on a lower surface of the printed circuit board.
  • the ground terminal extends from the edge of the printed circuit board to the side.
  • the conductive film has a one-sided adhesive property.
  • the protective layer is attached by an adhesive material and covers the conductive film.
  • the conductive film has a double-sided adhesive property.
  • a protective layer is further directly attached to the conductive film to cover the conductive film.
  • the conductive film having the double-sided adhesive property is attached to the periphery of the printed circuit board.
  • the protective layer covers the printed circuit board through the conductive film having double-sided adhesive properties.
  • the embodiment of the present application provides the grounding device of the display device, including: a metal side frame disposed on four sidewalls of the inner frame of the display device; and a grounding end disposed on the lower surface of the printed circuit board or from the The edge of the printed circuit board extends to the side; the conductive film is attached and electrically connected to the ground end of the printed circuit board and the metal side frame; and the protective layer is made of an insulating material, covers the printed circuit board and is adhered A material is attached to the periphery of the printed circuit board to secure the printed circuit board and extends to cover and secure the flexible flat cable.
  • the conductive film has a one-sided adhesive property.
  • the protective layer is attached by an adhesive material and covers the conductive film.
  • the conductive film has a double-sided adhesive property.
  • a protective layer is further directly attached to the conductive film to cover the conductive film.
  • the conductive film having the double-sided adhesive property is attached to the periphery of the printed circuit board.
  • the protective layer covers the printed circuit board through the conductive film having double-sided adhesive properties.
  • the display device and the grounding device provided by the embodiments of the present invention improve the structure formed by components such as screws and grounding shrapnel in the prior art, and the space occupied by the components is omitted, so that the liquid crystal display device can be more compact.
  • the conventional metal cover is replaced by a combination of an insulating top side protection frame and a metal side frame without affecting the grounding effect of the printed circuit board, thereby preventing the charge transmitted to the metal cover from affecting the display quality.
  • FIG. 1 is a schematic view showing the grounding of a circuit board of an exemplary display device through a metal outer frame.
  • FIG. 2 is a schematic view showing the bottom structure of the display device shown in FIG. 1.
  • FIG. 2 is a schematic view showing the bottom structure of the display device shown in FIG. 1.
  • FIG. 3A is a schematic structural view of a liquid crystal display device according to an embodiment of the present application, and an internal structure diagram of a dotted line region.
  • 3B and 3C are schematic diagrams showing a partial structure of a liquid crystal display device according to an embodiment of the present application.
  • FIG. 3D is a schematic partial structural view of a bottom portion of a display device according to an embodiment of the present application.
  • FIGS. 4A and 4B are schematic diagrams showing a partial structure of a bottom portion of a display device according to an embodiment of the present application.
  • 4C is a side elevational view of a bottom portion of a display device of an embodiment of the present application.
  • 4D is a schematic partial structural view of a bottom portion of a display device according to an embodiment of the present application.
  • 4E is a side elevational view of a bottom portion of a display device of an embodiment of the present application.
  • Fig. 5 is a side elevational view showing the bottom portion of the display device of the embodiment of the present application.
  • FIG. 6 is a partial schematic structural view of a liquid crystal display device according to an embodiment of the present application.
  • Fig. 7 is a side elevational view showing the bottom portion of a liquid crystal display device of an embodiment of the present application.
  • FIGS. 8A and 8B are schematic diagrams showing a partial structure of a liquid crystal display device according to an embodiment of the present application.
  • connection is to be understood broadly, and may be fixed or detachable, for example, unless otherwise specifically defined and defined.
  • Connections, or integral connections may be mechanical connections or electrical connections; they may be directly connected or indirectly connected via an intermediate medium.
  • attachment and “stick” should be understood broadly, and may be, for example, a partial attachment, a complete adhesion attachment, or a detachable attachment. The specific meanings of the above terms in the present application can be understood in the specific circumstances for those skilled in the art.
  • a typical display device 10 includes a metal outer frame 100, a frame 200, a display panel 300, and a printed circuit board 400.
  • the display panel 300 is disposed on the upper surface of the frame 200
  • the printed circuit board 400 is disposed on the lower surface of the frame 200.
  • the display panel 300 and the frame 200 are electrically connected through a flexible flat cable 510.
  • the metal bezel 100 is fitted over the outside of the bezel 200 from top to bottom and has a hollow region exposing the display panel 300.
  • the ground terminal 430 is disposed on the side of the printed circuit board 400 adjacent to the metal outer frame 100, and the ground terminal 430 is fixed by the screw 435.
  • the grounding spring 440 is disposed to electrically connect the ground terminal 430 to the metal outer frame 100.
  • the grounding spring 440 is fixed to the metal frame 100 through another screw (not shown in the drawing).
  • the metal frame is simultaneously connected to the display panel, and the accumulated charge still has a great chance to interfere with the alignment of the liquid crystal molecules through the contact with the display panel.
  • the setting of the embodiment of the present application can avoid interference with the arrangement of liquid crystal molecules.
  • the display device 900 has a display panel 130.
  • the display panel 130 is disposed on the frame 110.
  • the frame 110 may be any insulating material capable of supporting without deformation, but is not limited thereto.
  • the metal side frames 101 are disposed on the four side walls of the frame 110, and the metal side frames 101 may be directly fixed to the four side walls of the frame 110, or a space may be left between the frames 110 for providing other lines or components. In the case of the above-described indwelling space, the metal side frame 101 can be fixed to the relative position between the frame 110 by other means.
  • the top side protection frame 102 is disposed above the frame 110 and the display panel 130.
  • the top side protection frame 102 may be any insulating material capable of supporting without deformation, but is not limited thereto.
  • the top side protection frame 102 has a hollow area for exposing the display panel 130. The area of the hollow area is smaller than that of the display panel 130. Therefore, when the top side protection frame 102 is disposed above the frame 110 and the display panel 130, the stability of the display panel to the frame 110 can be further improved.
  • the top side protection frame 102 can be fixed to the frame 110 in any suitable manner.
  • the top side protection frame 102 can directly adhere to the frame 110 by using an adhesive material, or the top side protection frame 102 and the metal side frame 101 can have corresponding connection components.
  • the relative positions of the top side protection frame 102 and the metal side frame 101 can be fixed through the connection assembly, and further fixed to the frame 110, but the method is not limited to the above.
  • the printed circuit board 150 is disposed below the frame 110, for example, directly under the frame 110 or at a portion of the bottom of the frame 110, so that the printed circuit board 150 is partially buried in the frame 110.
  • the printed circuit board 150 may not be in contact with the metal side frame 101 when disposed.
  • the printed circuit board 150 can transmit a signal required to display an image to the display panel 130 through the flexible flat cable 151.
  • the flexible flat cable 151 can be electrically connected to the display panel 130 through the recessed space between the metal side frame 101 and the frame 110 along the surface of the frame 110 .
  • the flexible flat cable 151 can be electrically connected to the display panel 130 through the through hole 120 by providing a vertical through hole 120 in the frame 110 .
  • the printed circuit board 150 can have a ground terminal 153.
  • the ground terminal 153 can be disposed to extend outwardly from the edge of the printed circuit board 150, but not at the same edge as the flexible flat cable 151. Inadvertent contact.
  • the display device 900 further includes a conductive film 160.
  • the conductive film 160 is electrically connected to the ground end 153 of the printed circuit board 150 and the metal side frame 101, so that the electric charge accumulated on the printed circuit board 150 can be moved to the metal side frame 101 through the conductive film 160 and released to the external environment.
  • the conductive film 160 is attached to the printed circuit board 150 and the metal side frame 101 through an adhesive material.
  • the conductive film 160 is a conductive tape having a single-sided adhesive property or a double-sided adhesive property.
  • the material of the conductive film 160 may be, for example, an aluminum foil, a copper foil, a conductive polymer, or the like, but is not limited thereto.
  • a plurality of grounding ends 153 may be provided to improve the grounding effect.
  • a plurality of grounding ends 153 may be respectively disposed at the same edge of the printed circuit board 150, or respectively disposed at different edges, but not at the same edge as the flexible flat cable 151 to avoid inadvertent contact.
  • the conductive film 160 may be divided into a plurality of segments, and the plurality of grounding ends 153 are electrically connected to the metal side frames 100, respectively.
  • the display device 900 further includes a protective layer 170, which may be composed of an insulating material.
  • a protective layer 170 which may be composed of an insulating material.
  • the protective layer 170 may be overlaid on the printed circuit board 150 and attached to the periphery of the printed circuit board 150 through the adhesive layer 180. And a periphery of the conductive film 160 to fix the printed circuit board 150 and the conductive film 160.
  • the protective layer 170 can serve as an electrical barrier to isolate the circuits and components on the printed circuit board 150 from the outside world, thereby avoiding external environment factors from interfering with signals and causing abnormal display results.
  • a schematic side view of the above structure is shown in Fig. 4C.
  • the protective layer 170 can further extend and cover the flexible flat cable 151 to act as an electrical barrier to avoid interference from external environmental factors. Further, while the protective layer 170 covers the possibility of the flat cable 151, the flexible flat cable 151 can be fixed by an adhesive material.
  • the liquid crystal display device provided by the embodiments of the present application, and the grounding device composed of the combination of the printed circuit board, the metal side frame, the conductive film and the protective layer in the embodiments can effectively improve the prior art.
  • the top side protection frame 102 and the metal side frame 101 are often formed into an integrally formed metal cover, and the whole is electrically conductive. Therefore, when excess charge is transferred to the metal cover, it may not be released to the external environment, or a portion that is first transmitted to a portion closer to the display panel 130 is released, causing interference to the signal transmitted to the display panel 130, or The charges affect the arrangement of the liquid crystal molecules in the display panel 130, resulting in an abnormality in the image displayed by the display device 900.
  • the portion of the embodiment of the present application that contacts the display panel 130 has only the insulating material frame 110 and the top side protective frame 102. Therefore, the charge transmitted to the metal side frame 101 through the conductive film 160 does not affect the display panel. 130, and does not affect the effect of the charge being transmitted through the metal side frame 101 to the external environment.
  • the use of the conductive film 160 with adhesive properties instead of the structure of the screw and the grounding shrapnel can reduce several steps in the manufacturing process, and can eliminate the space occupied by the screw and the grounding shrapnel, thereby manufacturing a thinner and lighter liquid crystal display device.
  • the display panel can be, for example, an LCD display panel, an OLED display panel, a QLED display panel, a curved display panel, or other display panel.
  • the conductive film 160 is optimized, and the conductive film 160 having the double-sided adhesive property is used instead of the conductive film 160 having the single-sided adhesive property, and the rest of the arrangement is the same as the foregoing embodiment.
  • the conductive film 160 is a conductive tape having a double-sided adhesive property
  • the conductive film 160 may be pasted on the printing.
  • the protective layer 170 is adhered to the printed circuit board 150, the grounding end 153, and the metal side frame 101 through the adhesive property of the exposed surface of the conductive film 160.
  • the function of the adhesive layer 180 is replaced by the conductive film 160 having the double-sided adhesive property, and the thickness of the adhesive layer 180 can be omitted, which is more in the process of manufacturing the liquid crystal display device.
  • the step of providing the adhesive layer 180 can be omitted.
  • a side view of the above structure is shown in Fig. 4E.
  • the ground terminal 153 is optimized to provide the ground terminal 153 on the lower surface of the printed circuit board 150 instead of extending outside the edge of the printed circuit board, with the rest of the arrangement being the same as in the previous embodiment.
  • the conductive film 160 is a conductive tape and has a certain degree of flexibility
  • the ground end is disposed on the lower surface of the printed circuit board 150 without affecting the arrangement of the conductive film 160 and the protective layer 170. This setting method can reduce the difficulty in the process of the ground terminal 153.
  • the printed circuit board 150, the flexible flat cable 151, and the protective layer 170 are optimized, and an insulating connecting portion 155 is added.
  • the rest of the arrangement is the same as in the previous embodiment.
  • the flexible flat cable 151 is replaced with a flexible flat cable whose surface is covered with an insulating protective material in advance, and is defined as a surface insulated cable 1511.
  • An insulating connecting portion 155 is added to the end of the surface insulated cable 1511, that is, to the junction with the printed circuit board 150.
  • the insulative connecting portion 155 has an insulative housing and a hollow region, and the hollow region has a fixable port structure to electrically connect the other components to the surface insulating cable 1511.
  • a printed circuit board 1501 having a corresponding port structure is used instead of the printed circuit board 150, and a printed circuit board 1501 and a surface insulated cable 1511 are connected through a port structure.
  • the protective layer 170 only needs to be disposed on the printed circuit board 1501 and the conductive film 160 without extending to cover the surface insulating cable 1511. Since the surface of the surface insulated cable 1511 is an insulating protective material, it is less susceptible to other interference.
  • the additional insulating connecting portion 155 can strengthen the stability between the cable and the printed circuit board and improve the service life of the liquid crystal display device.
  • the insulating outer casing can use a higher insulating material than the protective layer 170, thereby protecting the relatively weak joints to avoid falling off or damage caused by collision or other factors in the process.
  • the protective layer 170 does not need to extend over the surface insulating cable, it is relatively simple in the manufacturing process.
  • the grounding end 153 of the printed circuit board 150 can be optimized, the grounding end 153 is disposed at the edge of the printed circuit board 150 and extends outward to the boundary of the protruding frame 110, and the remaining settings are the same as in the previous embodiment. . As shown in FIG. 7, the ground end 153 extends from the edge of the printed circuit board 150 as an outer side and directly contacts the metal side frame 101. In this case, the electric charge accumulated by the printed circuit board 150 can be directly moved to the metal side frame 101 via the ground end 153 without additionally providing the conductive film 160.
  • the metal side frame 101 may have a slot adapted to the ground end 153 for the grounding end 153 to be directly inserted into the slot for fixing, thereby being in direct contact with the metal side frame 101 for electrical connection.
  • the portion of the printed circuit board 150 that protrudes from the frame 110 includes only the ground terminal 153 and is free of other circuitry.
  • the protective layer 170 is provided as an electrical barrier.
  • the structure of the printed circuit board 150, the flexible flat cable 151, and the through hole 120 described above may be optimized.
  • the conductive portion 900 is provided on the back side of the printed circuit board 150, that is, on the side facing the frame 110.
  • the opening of the through hole 120 facing the printed circuit board 150 is set to a specific shape, and optionally, the specific shape is matched with the conductive portion 900.
  • the conductive portion 900 is fixed in the through hole, and the flexible flat cable 151 directly passes through the conductive portion 900 and passes through the through hole 120 to make the printed circuit board 150 and
  • the display panel 130 is electrically connected.
  • the junction of the printed circuit board 150 and the flexible flat cable 151 is completely within the through hole 120, and does not need to be additionally insulated from the outside by the protective layer 170.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

一种显示装置(900)及其接地装置，显示装置(900)包括：显示面板(130)；框架(110)，由绝缘性材料所构成，且显示面板(130)设置于框架(110)上；金属侧框(101)，设置在框架(110)的四个侧壁上；顶侧保护框(102)，设置在框架(110)及显示面板(130)上，是由绝缘性材料构成，其中顶侧保护框(102)具有暴露显示面板(130)的中空区域，且中空区域小于显示面板(130)；印刷电路板(150)，设置在框架(110)下方且不接触金属侧框(101)，并且透过可挠性扁平电缆(151)电性连接到显示面板(130)；导电膜(160)，贴附并电性连接印刷电路板(150)的接地端(153)及金属侧框(101)；以及保护层(170)，由绝缘性材料构成，覆盖在印刷电路板(150)上并透过黏着材料贴附在印刷电路板(150)的周边，以固定印刷电路板(150)，且延伸以覆盖并固定可挠性扁平电缆(151)。

Description

显示装置及其接地装置 技术领域
本申请实施例涉及显示装置，具体而言，特别是涉及一种显示装置及其接地装置。
 背景技术
显示装置是目前市占率最高的显示器种类，其轻、薄、省电及易于小型化的优点，使日常生活中随处可见其踪迹，如移动电话、笔记本电脑、数字型摄录像机、平板计算机等产品大多是使用显示装置。现今，使用率最高的显示装置是属于薄膜晶体管型显示装置(TFT-LCD)。
显示装置与电浆显示器(PDP)、有机发光二极管显示器(OLED)等技术不同，是属于非自发光型的显示器，需要额外设置背光源。同时，透过显示装置内的驱动电路，将特定的信号转换并输出且切换电压，使显示面板的液晶分子排列方向产生改变。上述背光源产生的光透过上述面板形成画素，并透过每点像素的透光率高低构成显示的画面。
根据上述显示装置的显示原理，外界的噪声、电荷或电场变化十分容易对液晶分子的排列产生干扰，使显示的影像出现异常。因此，为防止上述干扰，必须设置驱动电路的印刷电路板必须隔绝外界影响，且在隔绝期间设法不因无法排除印刷电路板本身累积的电荷进而对自身传输之信号产生干扰。
现有技术中，已有应对上述问题而提出的部分解决方案。典型的显示装置包括金属外框、框架、显示面板及印刷电路板。为防止印刷电路板上累积的电荷所可能产生的问题，现有技术在印刷电路板邻接金属外框的侧边设置接地端子，同时，设置接地弹片使接地端子电性连接到金属外框。其中接地弹片是透过另一螺丝固定在金属外框上，进而将印刷电路板上累积的电荷透过接地弹片转移至金属外框并释放到外界环境中。
然而，上述方案中金属外框是同时连接到显示面板上，累积的电荷仍有很大机会透过与显示面板的接触进而对液晶分子的排列产生干扰，因此，仍有尚待改进的空间。
 技术问题
本申请实施例要解决的技术问题在于，提供一种显示装置，减少外界的噪声、电荷或电场变化对液晶分子的排列产生干扰。
本申请实施例进一步要解决的技术问题在于，提供上述显示装置的接地装置，减少外界的噪声、电荷或电场变化对液晶分子的排列产生干扰。
 技术解决方案
为解决上述问题，本申请实施例提供一种显示装置，其包括：显示面板；框架，其是由绝缘性材料所构成，且显示面板设置于框架上；金属侧框，设置在框架的四个侧壁上；顶侧保护框，设置在框架及显示面板上，是由绝缘性材料构成，其中顶侧保护框具有暴露显示面板的中空区域，且中空区域小于显示面板；印刷电路板，设置在框架下方且不接触金属侧框，并且透过可挠性扁平电缆电性连接到显示面板；导电膜，贴附并电性连接印刷电路板的接地端及金属侧框；以及保护层，由绝缘性材料构成，覆盖在印刷电路板上并透过黏着材料贴附在印刷电路板的周边，以固定印刷电路板，且延伸以覆盖并固定可挠性扁平电缆。
可选地，接地端是设置在印刷电路板的下表面。
可选地，接地端是从印刷电路板的边缘向侧边延伸。
可选地，导电膜具有单面黏贴性质。
可选地，将保护层通过黏着材料贴附并覆盖导电膜。
可选地，导电膜具有双面黏贴性质。
可选地，进一步直接贴附保护层至导电膜上以覆盖导电膜。
可选地，贴附所述具有双面黏贴性质的导电膜在所述印刷电路板的周边。
可选地，所述保护层透过所述具有双面黏贴性质的导电膜覆盖所述印刷电路板。
另一方面，本申请实施例提供上述显示装置的接地装置，包括：金属侧框，设置在显示装置内框架的四个侧壁上；接地端，设置于印刷电路板的下表面或从所述印刷电路板的边缘向侧边延伸；导电膜，贴附并电性连接印刷电路板的接地端及金属侧框；以及保护层，由绝缘性材料构成，覆盖在印刷电路板上并透过黏着材料贴附在印刷电路板的周边，以固定印刷电路板，且延伸以覆盖并固定可挠性扁平电缆。
可选地，导电膜具有单面黏贴性质。
可选地，将保护层通过黏着材料贴附并覆盖导电膜。
可选地，导电膜具有双面黏贴性质。
可选地，进一步直接贴附保护层至导电膜上以覆盖导电膜。
可选地，贴附所述具有双面黏贴性质的导电膜在所述印刷电路板的周边。
可选地，所述保护层透过所述具有双面黏贴性质的导电膜覆盖所述印刷电路板。
 有益效果
本申请实施例提供的显示装置及其接地装置，改良了现有技术中利用螺丝、接地弹片等组件所构成的结构，省去该些组件占有的空间，使液晶显示设备可更臻轻巧。此外，在不影响印刷电路板的接地效果的同时，以具有绝缘性的顶侧保护框及金属侧框的组合取代传统金属罩，避免传输到金属罩的电荷影响到显示质量。
 附图说明
通过参照附图详细说明示例性实施方式，以上及其它特征和优点对本领域技术人员将变得更明显。此外，附图中所绘示各组件间的大小比例及设置位置皆是用以便于详细解说其间之关系，而并非用于限定该等组件的大小及位置关系。在本申请的附图中：
图1是范例的显示装置的电路板透过金属外框接地的示意图。
图2是对应图1所示的显示装置的底部结构示意图。
图3A是本申请的一实施例的液晶显示设备的结构示意图，以及其中虚线区域的内部结构示意图。
图3B及图3C是本申请的一实施例的液晶显示设备的局部结构示意图。
图3D是本申请的一实施例的显示装置的底部局部结构示意图。
图4A及图4B是本申请的一实施例的显示装置的底部局部结构示意图。
图4C是本申请的一实施例的显示装置的底部局部结构侧视图。
图4D是本申请的一实施例的显示装置的底部局部结构示意图。
图4E是本申请的一实施例的显示装置的底部局部结构侧视图。
图5是本申请的一实施例的显示装置的底部局部结构侧视图。
图6是本申请的一实施例的液晶显示设备的局部结构示意图。
图7是是本申请的一实施例的液晶显示设备的底部局部结构侧视图。
图8A及图8B是本申请的一实施例的液晶显示设备的局部结构示意图。
本申请的实施方式
以下将参照附图更全面地说明示例性实施方式；然而，它们可以不同形式体现并不应理解成受限于文中所述实施方式。相反，提供这些实施方式以使得本公开彻底而完整，并将完整地将本申请的范围传达给本领域技术人员。
在本申请的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、“内”、“外”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申请和简化描述，而不是暗示所指的装置或组件必须具有特定的方位，因此不能理解为对本申请的限制。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电性连接；可以是直接相连，也可以通过中间媒介间接相连。术语“贴附”、 “黏贴”应做广义理解，例如，可以是部分贴附、可以是完全密合贴附，也可以是可拆卸的贴附等。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
如图1所示的范例中，如同前文所述，已有应对前述问题而提出的部分解决方案。典型的显示装置10包括金属外框100、框架200、显示面板300及印刷电路板400。显示面板300设置在框架200的上表面，而印刷电路板400设置在框架200的下表面。显示面板300及框架200透过可挠性扁平电缆510电性连接。金属外框100由上而下套合在胶框200的外侧，并且具有暴露显示面板300的中空区域。
为防止上述印刷电路板400累积电荷所可能产生的问题，如图2所示，在印刷电路板400邻接金属外框100的侧边设置接地端子430，且接地端子430是透过螺丝435固定在框架200上。同时，设置接地弹片440使接地端子430电性连接到金属外框100。其中接地弹片440是透过另一螺丝(未呈现在附图中)固定在金属外框100上。透过上述设置，印刷电路板400上累积的电荷可透过接地弹片转移至金属外框100并释放到外界环境中。
然而，上述方案中金属外框是同时连接到显示面板上，累积的电荷仍有很大机会透过与显示面板的接触进而对液晶分子的排列产生干扰。本申请实施例的设置相较于范例，可避免对液晶分子的排列产生干扰。
如图3A所示，在本申请的显示装置的一实施例中，显示装置900具有显示面板130。显示面板130设置于框架110上，可选地，框架110可为任何能够支撑而不产生形变的绝缘性材料所构成，但不限于此。金属侧框101设置在框架110的四个侧壁上，金属侧框101可直接固定在框架110的四个侧壁上，或者可与框架110之间留置空间以供设置其他线路或组件。在上述留置空间的状况下，金属侧框101可透过其他方式固定与框架110之间的相对位置。顶侧保护框102设置在框架110及显示面板130的上方，可选地，顶侧保护框102可为任何能够支撑而不产生形变的绝缘性材料所构成，但不限于此。顶侧保护框102具有中空区域，用以暴露显示面板130。上述中空区域的面积小于显示面板130，因此，当顶侧保护框102设置在框架110及显示面板130的上方时，可更加提升显示面板固定在框架110上的稳固性。顶侧保护框102可以任何适当的方式固定在框架110上，例如：顶侧保护框102可直接利用黏着材料黏着框架110，或者顶侧保护框102及金属侧框101可具有相对应的连接组件，使设置顶侧保护框102时可透过上述连接组件固定顶侧保护框102及金属侧框101的相对位置，再进一步固定至框架110上，但方法不限于上述所提。
印刷电路板150设置在框架110的下方，例如：可直接设置在框架110下方或切除框架110的部分底部，使印刷电路板150部份埋入框架110中。印刷电路板150在设置时可不接触金属侧框101。印刷电路板150可透过可挠性扁平电缆151将显示影像所需要的信号传输至显示面板130。如图3A所示，可挠性扁平电缆151可沿着框架110的表面透过金属侧框101及框架110之间的留置空间电性连接至显示面板130。或者，亦可如图3B及图3C所示，透过在框架110中设置垂直方向的通孔120，使可挠性扁平电缆151可透过上述通孔120电性连接至显示面板130。
如图3D所示，印刷电路板150可具有接地端153，可选地，接地端153可设置从印刷电路板150的边缘向外延伸，但不和可挠性扁平电缆151设置在同一边缘以免不慎接触。显示装置900更包含导电膜160。导电膜160可电性连接印刷电路板150的接地端153及金属侧框101，使印刷电路板150上累积的电荷可透过导电膜160移动到金属侧框101，再释放至外部环境。导电膜160可透过黏着性材料贴附在印刷电路板150及金属侧框101。可选地，导电膜160是具有单面黏贴性质或双面黏贴性质的导电胶带。导电膜160的材质可为例如铝箔、铜箔、导电性高分子等，但不限于此。
除上述设置，如图4A所示，可设置若干个接地端153，以提高接地效果。在本申请的另一实施例中，若干个接地端153可分别设置在印刷电路板150的同一边缘，或分别设置在不同边缘，但不和可挠性扁平电缆151设置在同一边缘以免不慎接触。在设置若干个接地端153的情形下，导电膜160可分为若干片段，分别将若干个接地端153电性连接至金属侧框100。
显示装置900更包含保护层170，保护层170可由绝缘性材料组成。如图4B所示，当导电膜160是具有单面黏贴性质的导电胶带时，可将保护层170覆盖在印刷电路板150上，并透过黏着层180贴附在印刷电路板150的周边及导电膜160的周边，以固定印刷电路板150及导电膜160。同时，保护层170可作为电性屏障将印刷电路板150上的电路及组件与外界隔绝，避免外部环境的因素干扰信号而造成显示结果异常。上述结构的侧面示意图如图4C所示。保护层170可进一步延伸并覆盖可挠性扁平电缆151，以作为电性屏障避免外部环境因素干扰。更进一步地，保护层170覆盖可能性扁平电缆151的同时，可透过黏着性材料固定可挠性扁平电缆151。
透过以上本申请的实施例所提供的液晶显示设备，以及该些实施例中由印刷电路板、金属侧框、导电膜及保护层之间的组合构成的接地装置可有效改善现有技术中的接地装置的问题。现有技术中，多将顶侧保护框102及金属侧框101制作成为一体成形的金属罩，整体皆具有导电性。因此，在将多余电荷传输至金属罩时，可能并未释放至外部环境，或者部分先被传输到距离显示面板130较近的部分才释放，造成干扰到传输到显示面板130的信号，或者因该些电荷影响显示面板130中液晶分子的排列，导致显示装置900显示的影像产生异常。相较之下，本申请实施例接触显示面板130的部分仅有绝缘性材料的框架110及顶侧保护框102，因此透过导电膜160传输到金属侧框101的电荷不会影响到显示面板130，且亦不会影响电荷透过金属侧框101释放到外部环境的效果。此外，使用具有黏贴性质的导电膜160取代螺丝及接地弹片的结构，可减少制造过程中若干个步骤，更可省去螺丝及接地弹片占去的空间，进而制造出更轻薄的液晶显示设备。其中，显示面板可例如为LCD显示面板、OLED显示面板、QLED显示面板、曲面显示面板或其他显示面板。
除上述实施例以外，还可依据实际状况及需求，针对其中若干个组件进行优化，更加增强本申请的优点，下文将以不同实施例进行示例说明。
在一实施例中，针对导电膜160进行优化，使用具有双面黏贴性质的导电膜160取代具有单面黏贴性质的导电膜160，其余设置与前述实施例相同。如图4D所示，当导电膜160是具有双面黏贴性质的导电胶带时，除了将导电膜160电性连接接地端153及金属侧框101外，还可将导电膜160黏贴在印刷电路板150的周围。接着，透过导电膜160裸露面的黏贴性质，将保护层170黏贴在印刷电路板150、接地端153及金属侧框101上。相较于具有单面黏贴性质的导电膜160，使用具有双面黏贴性质的导电膜160取代黏着层180的功能，可省去黏着层180的厚度，在制造液晶显示设备的制程中更可省去设置黏着层180的步骤。上述结构的侧面示意图如图4E所示。
在另一实施例中，针对接地端153进行优化，将接地端153设置在印刷电路板150的下表面，而非由印刷电路板的边缘项外侧延伸，其余设置与前述实施例相同。如图5所示，由于导电膜160是导电胶带，具有一定程度的可挠性，因此将接地端设置在印刷电路板150的下表面，不影响导电膜160及保护层170的设置。此设置方法可降低接地端153制程上的难度。
在另一实施例中，针对印刷电路板150、可挠性扁平电缆151及保护层170进行优化，并增设绝缘性连接部155，其余设置与前述实施例相同。如图6所示，使用表面以事先覆盖绝缘性保护材料的可挠性扁平电缆取代可挠性扁平电缆151，并将其定义为表面绝缘电缆1511。在表面绝缘电缆1511的尾端，亦即与印刷电路板150的连接处增设绝缘性连接部155。绝缘性连接部155具有绝缘性外壳及中空的区域，中空的区域具有可固定的端口结构，以使其他组件与表面绝缘电缆1511电性连接。此外，使用具有对应上述端口结构的印刷电路板1501取代印刷电路板150，透过端口结构连接印刷电路板1501及表面绝缘电缆1511。其后，在设置保护层170时，保护层170仅需设置于印刷电路板1501及导电膜160上，而不需延伸以覆盖表面绝缘电缆1511。由于表面绝缘电缆1511的表面即为绝缘性保护材料，因此不易受到其他干扰。增设的绝缘性连接部155，可强化电缆及印刷电路板间的稳固程度，提升液晶显示设备的使用寿命。其中，绝缘性外壳可使用刚性较保护层170更高的绝缘性材料，进而保护相对较脆弱的连接处，以避免制程中碰撞或其他因素造成的脱落或损伤。此外，由于保护层170不需延伸覆盖表面绝缘电缆，在制程上较为简易。
在另一实施例中，可针对印刷电路板150的接地端153进行优化，将接地端153设置在印刷电路板150的边缘并向外侧延伸至突出框架110的边界，其余设置与前述实施例相同。如图7所示，接地端153从印刷电路板150的边缘像外侧延伸并直接接触金属侧框101。在此情形下，印刷电路板150累积的电荷可直接经由接地端153移动到金属侧框101，而不需额外设置导电膜160。可选地，金属侧框101可具有适配接地端153的插槽，以供接地端153直接插入插槽中固定，进而与金属侧框101直接接触以便电性连接。可选地，印刷电路板150突出框架110的部分仅包含接地端153而不含其他电路。在确实使接地端153与金属侧框101电性连接后，设置保护层170作为电性屏障。
在又一实施例中，可针对印刷电路板150、可挠性扁平电缆151及上述通孔120的结构进行优化。如图8A及图8B所示，设置导电部900在印刷电路板150的背后侧，亦即，面向框架110的一侧。另外，将通孔120面向印刷电路板150的开口设置为特定形状，可选地，该特定形状与导电部900契合。当设置印刷电路板150在框架110的下表面时，使导电部900固定于通孔内，而可挠性扁平电缆151直接透过导电部900并穿过通孔120以使印刷电路板150及显示面板130电性连接。在此情形下，印刷电路板150与可挠性扁平电缆151的连接处完全处在通孔120内，不需额外依靠保护层170与外界绝缘。
以上所述的内容仅是依照本申请可选地实施例详细说明，而非限制本申请的权力范围。本申请相关领域具有通常知识者皆应理解，在不违背本申请之技术原理及精神下，可对上述实施例作出修改与变化。因此本申请之权利范围应如权利要求内容所述。

Claims (17)

  1. 一种显示装置，其特征在于，包括：
    显示面板；
    框架，由绝缘性材料所构成，且所述显示面板设置于所述框架上；
    金属侧框，设置在所述框架的四个侧壁上；
    顶侧保护框，设置在所述框架及所述显示面板上，是由绝缘性材料构成，其中所述顶侧保护框具有暴露所述显示面板的中空区域，且所述中空区域小于所述显示面板；
    印刷电路板，设置在所述框架下方且不接触所述金属侧框，并且透过可挠性扁平电缆电性连接到所述显示面板；
    导电膜，贴附并电性连接所述印刷电路板的接地端及所述金属侧框；以及
    保护层，由绝缘性材料构成，覆盖在所述印刷电路板上并透过黏着材料贴附在所述印刷电路板的周边，以固定所述印刷电路板，且延伸以覆盖并固定所述可挠性扁平电缆。
  2. 如权利要求1所述的显示装置，其特征在于，所述接地端是设置在所述印刷电路板的下表面。
  3. 如权利要求1所述的显示装置，其特征在于，所述接地端是从所述印刷电路板的边缘向侧边延伸。
  4. 如权利要求1所述的显示装置，其特征在于，所述导电膜具有单面黏贴性质。
  5. 如权利要求4所述的显示装置，其特征在于，所述保护层透过所述黏着材料贴附并覆盖所述导电膜。
  6. 如权利要求1所述的显示装置，其特征在于，所述导电膜具有双面黏贴性质。
  7. 如权利要求6所述的显示装置，其特征在于，所述保护层直接贴附至所述导电膜上以覆盖所述导电膜。
  8. 如权利要求7所述的显示装置，其特征在于，贴附具有双面黏贴性质的所述导电膜在所述印刷电路板的周边以作为所述黏着材料。
  9. 如权利要求8所述的显示装置，其特征在于，将所述保护层透过具有双面黏贴性质的所述导电膜覆盖并贴附所述印刷电路板。
  10. 一种显示装置的接地装置，其特征在于，包括：
    金属侧框，设置在所述显示装置内框架的四个侧壁上；
    接地端，设置于所述印刷电路板的下表面或从所述印刷电路板的边缘向侧边延伸；
    导电膜，贴附并电性连接所述印刷电路板的接地端及所述金属侧框；以及
    保护层，由绝缘性材料构成，覆盖在所述印刷电路板上并透过黏着材料贴附在所述印刷电路板的周边，以固定所述印刷电路板，且延伸以覆盖并固定所述可挠性扁平电缆。
  11. 如权利要求10所述的接地装置，其特征在于，所述导电膜具有单面黏贴性质。
  12. 如权利要求11所述的接地装置，其特征在于，所述保护层透过黏着材料贴附并覆盖所述导电膜。
  13. 如权利要求10所述的接地装置，其特征在于，所述导电膜具有双面黏贴性质。
  14. 如权利要求13所述的接地装置，其特征在于，所述保护层直接贴附至所述导电膜上以覆盖所述导电膜。
  15. 如权利要求14所述的接地装置，其特征在于，贴附具有双面黏贴性质的所述导电膜在所述印刷电路板的周边以作为所述黏着材料。
  16. 如权利要求15所述的接地装置，其特征在于，将所述保护层透过具有双面黏贴性质的所述导电膜覆盖并贴附所述印刷电路板。
  17. 一种显示装置，其特征在于，包括：
    显示面板；
    框架，由绝缘性材料所构成，且所述显示面板设置于所述框架上；
    金属侧框，设置在所述框架的四个侧壁上；
    顶侧保护框，设置在所述框架及所述显示面板上，是由绝缘性材料构成，其中所述顶侧保护框具有暴露所述显示面板的中空区域，且所述中空区域小于所述显示面板；
    印刷电路板，设置在所述框架下方且不接触所述金属侧框，并且透过可挠性扁平电缆电性连接到所述显示面板；
    导电膜，贴附并电性连接所述印刷电路板的接地端及所述金属侧框；以及
    保护层，由绝缘性材料构成，覆盖在所述印刷电路板上并透过黏着材料贴附在所述印刷电路板的周边，以固定所述印刷电路板，且延伸以覆盖并固定所述可挠性扁平电缆；
    其中，所述接地端是设置在所述印刷电路板的下表面或从所述印刷电路板的边缘向侧边延伸；
    其中，所述导电膜具有单面黏贴性质或双面黏贴性质；当所述导电膜具有单面黏贴性质，所述保护层透过黏着材料贴附并覆盖所述导电膜；当所述导电膜具有双面黏贴性质，所述导电膜贴附在所述印刷电路板的周边以作为所述黏着材料，并将所述保护层透过具有双面黏贴性质的所述导电膜覆盖并直接贴附所述印刷电路板。
PCT/CN2018/107258 2017-09-27 2018-09-25 显示装置及其接地装置 WO2019062695A1 (zh)

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