JP2010072272A - Electro-optical device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively remove external noise, and noise generated from an electronic component mounted in an electro-optical device. <P>SOLUTION: A liquid crystal device has a liquid crystal display panel, a first support member (frame), and a shield member. The liquid crystal display panel has a mounting area for mounting a driver IC or the like that is one example of the electronic component. The first support member has conductivity, stores the liquid crystal display panel, and is connected electrically to a reference potential V<SB>GND</SB>of 0 V or the like. The shield member has an insulating layer and a conductive layer. The driver IC is fixed by the insulating layer of the shield member via an adhesive or the like, and the conductive layer is connected electrically to the first support member. The noise generated in the driver IC or the like, or at the outside is thereby guided to the first support member via the shield member, to be discharged finally to the reference potential V<SB>GND</SB>. The noise generated in the electro-optical device or at the outside is removed effectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electro-optical device suitable for displaying various information.

  At present, electro-optical devices such as liquid crystal devices are widely used in electronic devices such as mobile phones, personal digital assistants, and computer displays to display images.

  Such an electro-optical device is configured by sandwiching an electro-optical material between a pair of substrates. And one board | substrate has an overhang | projection area | region projected outside from the end of the other board | substrate among a pair of board | substrates. A wiring board such as a driver IC for driving the electro-optical material and an FPC (Flexible Printed Circuit) electrically connected to the driver IC through a connection terminal is mounted on the projecting region. In such an electro-optical device, various signals necessary for display are input from the electronic device side to the driver IC via the wiring board and the connection terminals. Among these signals, high-frequency signals are included in order to switch and display images at high speed and to perform data transmission at high speed, and electromagnetic noise is becoming more likely to occur.

  In such an electro-optical device, the connection terminal that connects the FPC and the driver IC is often exposed to the outside. Therefore, the exposed connection terminal easily picks up external noise (such as electromagnetic noise). Further, when a high-frequency signal is transmitted between the FPC and the driver IC, noise generated by the transmission is easily radiated to the outside from the exposed connection terminal. If such noise is applied to the connection terminal or radiated from the connection terminal, the electro-optical device or the electronic apparatus may be abnormally operated due to the noise.

  In this regard, for example, Patent Document 1 describes an electro-optical device that does not cause abnormal operation even when external noise such as static electricity exists.

  Specifically, the electro-optical device described in Patent Document 1 includes an insulating material including an electromagnetic wave absorbing material that covers a connection portion between the electro-optical panel and the wiring board. And the insulating material has a dielectric strength larger than air, and is provided so that the board | substrate side terminal of the wiring board exposed outside may be covered. Thereby, it can be said that the board side terminals can be prevented from picking up electrical noise, and the electro-optical device can be prevented from causing abnormal operation due to external noise.

JP 2006-284829 A

  By the way, in the electro-optical device described in Patent Document 1, an insulating material containing an electromagnetic wave absorbing material {magnetic material} is not connected to a reference potential (for example, ground or ground). For this reason, when such an insulating material absorbs noise, a lot of electric charges are accumulated in the insulating material. Then, in this electro-optical device, the insulating material becomes an antenna, and the absorbed noise may be radiated to the outside (secondary radiation).

  The present invention has been made in view of the above points, and uses an electro-optical device capable of effectively removing noise generated from the outside and noise generated from mounted electronic components, and the same. It is an object to provide an electronic device.

  In one aspect of the present invention, an electro-optical device includes a frame having a conductive portion, an electro-optical panel housed in the frame, and an electronic component mounted in a mounting region of the electro-optical panel, A shield member having a conductive layer covering at least a part of the mounting region is in contact with the electronic component via an insulating layer, and the conductive layer of the shield member is electrically connected to the conductive portion of the frame. .

  The electro-optical device includes a frame, an electro-optical panel, and an electronic component. The frame has a conductive portion. The electro-optical panel is accommodated in the frame. The electronic component is mounted in the mounting area of the electro-optical panel.

  In particular, in this electro-optical device, a shield member having a conductive layer covering at least a part of the mounting region is in contact with an electronic component through an insulating layer, and the conductive layer of the shield member is electrically connected to the conductive portion of the frame. ing. Here, the reason why the electronic component is covered with the insulating layer (for example, insulating tape) of the shield member is that when the electronic component is directly attached to the conductive member of the shield member, noise enters the electronic component.

  According to this configuration, since the electronic component is covered with the shield member, the electromagnetic wave can be shielded. Specifically, in this configuration, noise (including electromagnetic wave noise) generated from the electronic component is released to the conductive portion of the frame via the shield member. Thereby, noise generated from the electro-optical device can be effectively removed. Therefore, it is possible to prevent malfunction of the electronic component due to noise and the like, and to prevent adverse effects on the operation of the electro-optical device.

  Further, noise generated from the outside can be prevented from being radiated to the electronic component by the shield member serving as a barrier. As a result, noise generated from the outside of the electro-optical device can be effectively removed. Accordingly, it is possible to prevent the electro-optical device from being adversely affected by noise.

  In a preferred example, the conductive layer of the shield member is preferably electrically connected to a reference potential. That is, by connecting the shield member to the ground, that is, connecting the conductive layer of the shield member to the reference potential, the shielding ability for efficiently releasing noise to the frame is further improved. For example, the ground terminal of the drive circuit mounted on the electro-optical device is connected to the conductive portion of the frame via a shield member, or the conductive portion of the frame is brought into contact with the casing of an electronic device in which the electro-optical device is incorporated. Just do it. That is, the shield member (including the conductive layer) covers at least a part of the mounting region where the electronic component is disposed in order to shield the emission and incidence of electromagnetic waves, and the conductive layer of the shield member is electrically at the reference potential. It is connected (contacted) to a frame having a conductive part so as to become a part. In addition, since the shield member is connected to the reference potential, it is possible to prevent electric charges due to noise from being accumulated in the shield member, and it is possible to prevent noise from being radiated to the outside (secondary radiation) from the shield member. .

  In order to completely remove such noise, it is preferable that all of the electronic components are covered with a shield member.

  In one aspect of the electro-optical device, the electronic component includes a first electronic component and a second electronic component, and the mounting region includes the first electronic component and the second electronic component. A component, and a terminal for electrically connecting the first electronic component and the second electronic component are disposed, and the shield member includes the first electronic component and the terminal, and the terminal and the electrical The second electronic component on the side to be connected is covered.

  According to this aspect, noise generated from the first electronic component and the terminal and the second electronic component on the side electrically connected to the terminal is released to the frame or the reference potential through the shield member. For this reason, noise generated from the electro-optical device can be effectively removed. Therefore, noise generated from the first electronic component and the terminal and the second electronic component on the side electrically connected to the terminal can be prevented from being radiated to the outside. Further, noise generated from the outside can be prevented from being radiated to the first electronic component and the terminal, and the second electronic component on the side electrically connected to the terminal, with the shield member serving as a barrier. Accordingly, it is possible to prevent the electro-optical device from being adversely affected by noise.

  In a preferred example, the shield member includes the conductive layer, the insulating layer disposed to overlap the conductive layer, and a conductive adhesive layer disposed to overlap a part of the conductive layer. In the shield member, the insulating layer is fixed to the first electronic component with an adhesive or an adhesive tape, and the conductive adhesive layer is electrically connected to the conductive portion of the frame. It is preferable. Alternatively, the shield member includes the conductive layer, a conductive adhesive layer disposed to overlap the conductive layer, and the insulating layer disposed to partially overlap the conductive adhesive layer. A part of the conductive adhesive layer is exposed from the insulating layer and is electrically connected to the conductive portion of the frame, and the insulating layer is bonded to the first electronic component with an adhesive or an adhesive. It is preferably fixed with a tape. In these aspects, since the insulating layer of the shield member is fixed to the electronic component with an adhesive or an adhesive tape, the shield member can be prevented from being peeled off from the electronic component.

  In another aspect of the electro-optical device, the first electronic component is a driver IC that controls a display state of the electro-optical panel, the second electronic component is a wiring board, and the driver IC includes A high frequency signal is input from the wiring board side through the terminal.

  According to this aspect, when noise generated during transmission of a high-frequency signal is radiated to the outside through the driver IC, wiring board, or terminal, the radiated noise is released to the frame or the reference potential through the shield member. Therefore, such noise can be effectively removed. Therefore, it is possible to prevent malfunction of the driver IC and malfunction of the electro-optical device due to such noise.

  In another aspect of the electro-optical device described above, in the shield member, at least a region overlapping the first electronic component in a planar manner has a light shielding property. According to this, light (external light) from the outside of the electro-optical device can be prevented from entering the first electronic component (for example, driver IC), and the first electronic component malfunctions due to the external light. Can be prevented.

  In still another aspect of the invention, an electronic apparatus including any one of the above electro-optical devices as a display unit can be configured.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[First embodiment]
(Configuration of liquid crystal device)
First, the configuration of a liquid crystal device 100 as an example of the electro-optical device according to the first embodiment of the invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a plan view of the liquid crystal device 100 according to the first embodiment as viewed from the display side. FIG. 2 is a cross-sectional view of the main part showing the configuration of the liquid crystal device 100 taken along the cutting line A-A ′ of FIG.

  The liquid crystal device 100 is disposed on the side opposite to the display side of the liquid crystal display panel 50, a liquid crystal display panel 50 as an example of an electro-optical panel, a pair of polarizing plates 5 and 6 that polarizes light passing therethrough, and a liquid crystal display An illumination device 51 that illuminates the panel 50 and a shield member 80 are provided.

  The liquid crystal display panel 50 includes a first substrate 1 and a second substrate 2 that are bonded to each other via a frame-shaped sealing material 3, and a liquid crystal as an example of an electro-optical layer in a region partitioned by the sealing material 3. The layer 4 is sandwiched. In the present invention, the liquid crystal display panel 50 is not limited to the following configuration, and may adopt various known configurations.

  The first substrate 1 has a region (hereinafter referred to as “mounting region”) 1 h that protrudes outward from one end 2 e of the second substrate 2. At least one electronic component, for example, a driver IC (Integrated Circuit) 7 and an FPC (Flexible Printed Circuit) 8 as a wiring board are mounted on the surface of the mounting region 1h on the second substrate 2 side, and a plurality of connection terminals 21 are provided. Etc. are implemented. The driver IC 7 has a plurality of input terminals 7a and a plurality of output terminals 7b. Each connection terminal 21 electrically connects each input terminal 7 a of the driver IC 7 and the FPC 8.

  A plurality of signal lines 22 are formed from the surface on the second substrate 2 side of the mounting region 1 h to the surface on the liquid crystal layer 4 side of the first substrate 1. Each signal line 22 is electrically connected to each output terminal 7 b of the driver IC 7. Note that the signal line 22 is supplied with data corresponding to display contents, a scanning line to which a scanning signal is supplied, and a common wiring to which a reference potential (for example, 0 [V], a ground potential) is supplied. Etc. are included.

  In addition, although not shown on the surface of the liquid crystal display panel 50 on the liquid crystal layer 4 side, for example, a black matrix, a color filter, electrodes, and many other components are arranged in a matrix (lattice) or stripe (linear). ). A display area for displaying an image is formed inside the sealing material 3 in the liquid crystal display panel 50.

  The polarizing plate 5 is disposed on the surface opposite to the liquid crystal layer 4 side of the first substrate 1, and the polarizing plate 6 is disposed on the surface opposite to the liquid crystal layer 4 side of the second substrate 2. Has been placed. For example, the transmission axis of the polarizing plate 5 is set to approximately 90 ° with respect to the transmission axis of the deflection plate 6.

  The illumination device 51 includes a first support member (frame) 10, a reflection sheet 11, a light guide plate 12, a light source 13, an optical sheet group, a second support member 17, and a light shielding tape 70. . Here, the optical sheet group includes a known optical sheet, for example, a diffusion sheet 14, a first prism sheet 15, and a second prism sheet 16.

The first support member 10 has a box shape and accommodates each component of the lighting device 51, the pair of polarizing plates 5 and 6, the liquid crystal display panel 50, and the like. In this example, the outer periphery of the first support member 10 on the light source 13 side has a U-shaped cross section. The first support member 10 is formed of a conductive material such as metal, and is electrically connected to a reference potential (for example, 0 V, a common potential such as the signal line 22 or ground) V _GND at an appropriate position. Connected.

  The reflection sheet 11 is a sheet-like member that reflects light, and is disposed on the surface of the first support member 10 that faces the liquid crystal display panel 50.

  The light guide plate 12 is formed of a transparent material, and is disposed on the opposite side of the reflective sheet 11 from the first support member 10 side and at a position facing the reflective sheet 11. The light guide plate 12 has a role of guiding the light L emitted from the light source 13 disposed at a position facing one end surface thereof toward the diffusion sheet 14. Examples of the light source 13 include a light emitting diode and a cold cathode tube.

  The diffusion sheet 14 is disposed on the opposite side of the light guide plate 12 from the reflection sheet 11 side and at a position facing the light guide plate 12, and diffuses the light L emitted from the light guide plate 12 toward the first prism sheet 15. Have a role to play.

  The first prism sheet 15 is arranged so as to overlap the surface of the diffusion sheet 14 opposite to the light guide plate 12 side, and condenses the light L emitted from the diffusion sheet 14 toward the second prism sheet 16. Play a role.

  The second prism sheet 16 is disposed so as to overlap the side of the first prism sheet 15 opposite to the diffusion sheet 14 side, and the light L emitted from the first prism sheet 15 is directed toward the liquid crystal display panel 50 side. It plays the role of condensing. The extending direction of the ridge line of the prism of the second prism sheet 16 is not illustrated, but is configured to extend in a direction substantially orthogonal to the extending direction of the ridge line of the prism of the first prism sheet 15. can do.

  The second support member 17 has a frame shape, and its inner peripheral portion (or inner wall) supports the outer peripheral portion (or outer wall) of the light guide plate 12 (not shown).

  The light shielding tape 70 has a frame shape, is located outside the optical sheet group, and overlaps with the outer peripheral portion of the liquid crystal display panel 50 in a planar manner (in this example, the second substrate 2 of the first substrate 1). It is disposed on the surface of the mounting area 1h opposite to the substrate 2 side. The light shielding tape 70 has a role of shielding unnecessary leakage light from the lighting device 51 and preventing the display quality of the liquid crystal display panel 50 from being adversely affected.

  The shield member 80 is a member that removes noise, and the configuration and arrangement thereof will be described later.

  In the liquid crystal device 100 having the above configuration, the light L emitted from the light source 13 propagates through the light guide plate 12 as indicated by the arrow in FIG. 2, and the propagated light L is the diffusion sheet 14 of the light guide plate 12. Emits light from the side surface. A part of the light L propagated in the light guide plate 12 is emitted from the surface on the reflection sheet 11 side and reflected by the reflection sheet 11, and the light is returned to the light guide plate 12 again. The light L emitted from the light guide plate 12 toward the diffusion sheet 14 passes through the optical sheet group and further proceeds toward the display area of the liquid crystal display panel 50. At this time, the orientation of the liquid crystal molecules of the liquid crystal layer 4 is controlled in the liquid crystal display panel 50, and a desired display image is visually recognized by an observer.

(Noise elimination structure)
Next, with reference to FIG.1 and FIG.2, the noise removal structure which concerns on 1st Embodiment is demonstrated.

  First, an example of a problem caused by noise in the liquid crystal device 100 will be briefly described. For example, when the liquid crystal device 100 is driven, various signals are input from the FPC 8 to the driver IC 7 via the connection terminal 21. Among these signals, high-frequency signals are also included for switching and displaying images at high speed or performing data transmission at high speed. During transmission of such a high-frequency signal, noise (for example, including electromagnetic wave noise, and so on) is easily radiated from the exposed portion of the connection terminal 21 that electrically connects the driver IC 7 and the FPC 8. In addition, noise may be emitted from the driver IC 7 itself to the outside, or noise may be input to the exposed portion of the connection terminal 21 from the outside of the liquid crystal device 100. If noise is radiated from the exposed portions of the driver IC 7 and the connection terminal 21, there is a risk of adversely affecting the operation of the liquid crystal device 100 and the operation of the electronic device in which the liquid crystal device 100 is mounted. Conversely, if such noise is input to the exposed portion of the connection terminal 21, the driver IC 7 may malfunction and an appropriate signal may not be input to the driver IC 7.

Therefore, in order to effectively remove such noise, in the present invention, in the liquid crystal device 100, a part that becomes a noise generation source or a part that easily picks up noise, for example, at least a part of an electronic component is interposed through an insulating layer. The shield member 80 is in contact with the shield member 80 and the conductive layer of the shield member 80 is electrically connected to a reference potential (for example, 0 V, a common potential such as the signal line 22 or ground) V _GND . It is electrically connected to the first support member 10. In the present invention, the first support member 10 and the reference potential V _GND may be electrically connected through a wiring (not shown).

  Note that at least some of the electronic components include, for example, the driver IC 7 (first electronic component), the exposed portion of the connection terminal 21, and the FPC 8 (second electronic component) on the side electrically connected to the connection terminal 21. The vicinity of the end portion (portion not covered by the first support member 10) and the like are included.

Specifically, in the first embodiment, the shield member 80 includes a conductive layer 81, an insulating layer 82 disposed so as to overlap the conductive layer 81, and a part of the conductive layer 81 located on the opposite side of the insulating layer 82. And a conductive adhesive layer 83 disposed on top of each other. Examples of the conductive adhesive layer 83 include an adhesive containing conductive particles, such as ACF (Anisotropic Conductive Film). In the shield member 80, the insulating layer 82 is fixed to the driver IC 7 by an adhesive (not shown) or an adhesive tape, and the conductive adhesive layer 83 is a conductor electrically connected to the reference potential V _GND. The first support member 10 is electrically connected. Here, the reason why the driver IC 7 is covered with the insulating layer 82 of the shield member 80 is that noise is input to the driver IC 7 if the driver IC 7 is directly covered with the conductive layer 81 of the shield member 80.

According to this configuration, for example, when a high frequency signal is input from the FPC 8 side to the driver IC 7 side via the connection terminal 21 and noise is emitted from the exposed portion of the connection terminal 21 due to this, or from the driver IC 7 itself. When noise is radiated, the noise is guided to the conductive layer 81 via the insulating layer 82 of the shield member 8, and further guided to the first support member 10 via the conductive adhesive layer 83. to be missed in the reference potential _{V GND.} Thereby, noise generated from the liquid crystal device 100 can be effectively removed. Therefore, it is possible to prevent adverse effects on the operation of the liquid crystal device 100 and the operation of the electronic device on which the liquid crystal device 100 is mounted due to the noise.

When noise is radiated from the outside of the liquid crystal device 100 toward the driver IC 7, the exposed portion of the connection terminal 21, the portion of the FPC 8 exposed from the first support member 10, the shield member 80 is It becomes a barrier and the noise can be prevented from being radiated to those parts. Such noise is guided to the conductive adhesive layer 83 via the conductive layer 81 of the shield member 80, and further escaped to the reference potential V _GND via the first support member 10. Thereby, the noise generated from the outside of the liquid crystal device 100 can be effectively removed. Therefore, external noise can be prevented from being applied to the driver IC 7, the exposed portion of the connection terminal 21, and the portion of the FPC 8 exposed from the first support member 10. As a result, it is possible to prevent a signal including noise from being input to the driver IC 7 and to prevent malfunction of the driver IC 7 due to noise.

Furthermore, since the shield member 80 is electrically connected to the reference potential V _GND , it is possible to prevent the electric charge generated due to noise from being accumulated in the shield member 80. Therefore, it is possible to prevent noise (secondary radiation) from being emitted from the shield member 80.

  In a preferred example, the shield member 80 is large enough to cover the driver IC 7, the exposed portion of the connection terminal 21, and the portion of the FPC 8 exposed from the first support member 10 in order to sufficiently exhibit the above-described effects. It is preferable to have a thickness.

  In the first embodiment, the shield member 80 has a U-shaped cross-section with the one end side in contact with the FPC 8 portion and the one end having a U-shaped cross section through the conductive adhesive layer 83. The first support member 10 is electrically connected to the inner surface (the surface on the second support member 17 side in this example). Accordingly, when an impact such as a drop is applied to the liquid crystal device 100, the FPC 8 and the first support member 10 can be prevented from contacting or colliding with each other, and the FPC 8 can be prevented from being damaged due to the collision.

  In order not to change the outer shape of the liquid crystal device 100 by the installation of the shield member 80, the thickness of the shield member 80 is preferably set not to exceed the thickness t <b> 1 of the liquid crystal device 100. Particularly, in recent years, since the liquid crystal device 100 has been increasingly thinned, it is preferable that the shield member 80 is formed of a thin tape.

  Further, one end side of the shield member 80 is, as described above, the inner surface of the first support member 10 having a U-shaped cross section through the conductive adhesive layer 83 (in this example, the second support member 17 side). Surface). Thereby, the one end side of the shield member 80 is not exposed to the outside of the first support member 10 and is difficult to peel off. Accordingly, the thickness of the liquid crystal device 100 on one end side of the shield member 80 can be prevented from becoming larger than the thickness t1 of the liquid crystal device 100. Therefore, it is possible to prevent the restriction due to the installation of the shield member 80 when the liquid crystal device 100 is mounted on an electronic device or the like that is becoming increasingly thinner in recent years.

  In the shield member 80, at least a region of the conductive layer 81 that overlaps with the driver IC 7 in a plane is preferably formed of a light-shielding material. Here, as the material having a light shielding property, for example, an aluminum tape that has a high noise reduction effect and is inexpensive is preferable. As a result, the driver IC 7 is covered with the shield member 80 having a light shielding property. Therefore, for example, light from the outside of the liquid crystal device 100 (external light) can be prevented from entering the driver IC 7, and malfunction of the driver IC 7 due to the external light can be prevented.

  Further, according to this configuration, since the insulating layer 82 of the shield member 80 is fixed to the driver IC 7 with an adhesive or an adhesive tape, the shield member 80 can be prevented from being peeled off from the driver IC 7.

[Second Embodiment]
Next, a noise removal structure according to the second embodiment will be described with reference to FIG.

  FIG. 3 is a cross-sectional view of a main part of a liquid crystal device 100a according to the second embodiment corresponding to FIG. 2, and particularly shows a noise removal structure using a shield member 80a and the like.

  Compared with the liquid crystal device 100 according to the first embodiment, the liquid crystal device 100a according to the second embodiment is common in that noise is effectively removed by providing a shield member, but the structure of the shield member, and The connection positions of the shield member and the first support member 10 are different, and the other points are the same. Therefore, below, the same code | symbol is attached | subjected about the element same as 1st Embodiment, and the description is abbreviate | omitted suitably.

Specifically, in the second embodiment, the shield member 80 a is disposed to partially overlap the conductive layer 81, the conductive adhesive layer 83 disposed so as to overlap the conductive layer 81, and the conductive adhesive layer 83. And an insulating layer 82. Here, a conductive member having a conductive layer 81 and a conductive adhesive layer 83 disposed on the conductive layer 81 exists in the world. Therefore, in the second embodiment, there is an advantage that the shield member 80a can be easily manufactured only by partially overlapping the insulating layer 82 with respect to the conductive adhesive layer 83 of the conductive member. . A portion 83a of the conductive adhesive layer 83 is electrically connected to the first support member 10 that is a conductor that is exposed to the outside from the insulating layer 82 and is electrically connected to the reference potential V _GND. The insulating layer 82 is fixed to the driver IC 7 with an adhesive (not shown) or an adhesive tape. Here, the reason why the driver IC 7 is covered via the insulating layer 82 of the shield member 80a is that noise is input to the driver IC 7 if the driver IC 7 is directly covered with the conductive adhesive layer 83 of the shield member 80a. .

According to this configuration, for example, when a high frequency signal is input from the FPC 8 side to the driver IC 7 side via the connection terminal 21 and noise is emitted from the exposed portion of the connection terminal 21 due to this, or from the driver IC 7 itself. When noise is radiated, the noise is guided to the conductive adhesive layer 83 via the insulating layer 82 of the shield member 8 and further guided to the first support member 10 via the conductive adhesive layer 83. Finally, the reference potential V _GND is lost. Thereby, noise generated from the liquid crystal device 100a can be effectively removed. Therefore, it is possible to prevent adverse effects on the operation of the liquid crystal device 100a and the operation of the electronic device in which the liquid crystal device 100a is mounted due to the noise.

When noise is radiated from the outside of the liquid crystal device 100a toward the driver IC 7, the exposed portion of the connection terminal 21, the portion of the FPC 8 exposed from the first support member 10, the shield member 80a It becomes a barrier and the noise can be prevented from being radiated to those parts. Such noise is guided to the conductive adhesive layer 83 via the conductive layer 81 of the shield member 80a, and further escaped to the reference potential V _GND via the first support member 10. As a result, noise generated from the outside of the liquid crystal device 100a can be effectively removed. Therefore, it is possible to prevent noise from being applied to the driver IC 7, the exposed portion of the connection terminal 21, and the portion of the FPC 8 exposed from the first support member 10. As a result, it is possible to prevent a signal including noise from being input to the driver IC 7 and to prevent malfunction of the driver IC 7 due to noise.

Furthermore, since the shield member 80a is electrically connected to the reference potential V _GND , it is possible to prevent electric charges generated due to noise from being accumulated in the shield member 80a. Therefore, it is possible to prevent noise (secondary radiation) from being emitted from the shield member 80a.

  In a preferred example, the shield member 80 a is large enough to cover the driver IC 7, the exposed portion of the connection terminal 21, and the portion of the FPC 8 exposed from the first support member 10 in order to sufficiently exhibit the above-described effects. It is preferable to have a thickness. The planar shape of the shield member 80a can be the same planar shape as the shield member 80 according to the first embodiment, as shown in FIG.

  In order not to change the outer shape of the liquid crystal device 100a by the installation of the shield member 80a, the thickness of the shield member 80a is preferably set not to exceed the thickness t1 of the liquid crystal device 100a. Particularly, in recent years, since the liquid crystal device 100a has been increasingly thinned, it is preferable that the shield member 80a is formed of a thin tape.

  In the second embodiment, the shield member 80a only needs to connect one end side thereof (that is, a part of the conductive adhesive layer 83 exposed to the outside from the insulating layer 82) to the first support member 10. Compared with the first embodiment, the shield member 80a can be easily attached to the liquid crystal device 100a.

  In the shield member 80a, it is preferable that at least a region of the conductive layer 81 that overlaps with the driver IC 7 in a plane is formed of a light-shielding material. Here, as the material having a light shielding property, for example, an aluminum tape that has a high noise reduction effect and is inexpensive is preferable. As a result, the driver IC 7 is covered with the shielding member 80a having a light shielding property. Therefore, for example, light from the outside of the liquid crystal device 100a (external light) can be prevented from entering the driver IC 7, and malfunction of the driver IC 7 due to the external light can be prevented.

  Further, according to this configuration, since the insulating layer 82 of the shield member 80a is fixed to the driver IC 7 with an adhesive or an adhesive tape, the shield member 80a can be prevented from being peeled off from the driver IC 7.

[Modification]
The present invention is not limited to the configuration of the liquid crystal devices 100 and 100a according to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the first and second embodiments described above, the end surfaces of the shield members 80 and 80a on the liquid crystal display panel 50 side are further extended to the second substrate 2 side, and the liquid crystal display is performed from the output terminal 7b side of the driver IC 7. The exposed portion of the signal line 22 extending to the panel 50 side may be covered with the shield members 80 and 80a. According to this, it is possible to prevent noise radiated from the outside of the liquid crystal devices 100 and 100a from being input to the signal line 22, and to prevent adverse effects on the operation of the liquid crystal devices 100 and 100a.

  Moreover, in this invention, it is not limited to the structure of the above-mentioned shield members 80 and 80a, As long as the above-mentioned effect can be obtained, you may add a various deformation | transformation to the structure.

In the present invention, the first support member 10 does not necessarily have to be formed of a conductor. For example, in the present invention, in the first support member 10, at least only a region that can be electrically connected to the conductive adhesive layer 83 of the shield members 80 and 80 a is formed by the conductive portion, and the conductive portion is the reference potential described above. It may be configured to be electrically connected to V _GND .

  In the present invention, the shield members 80 and 80a are electrically connected to various electronic components mounted on the liquid crystal devices 100 and 100a and the electronic components in addition to the driver IC 7 and the FPC 8 as an example of the wiring board. The terminal exposed to the outside may be covered. Thereby, it is possible to prevent noise from being applied to these electronic components and terminals, or it is possible to prevent noise from being radiated to the outside from these electronic components and terminals.

  In the present invention, it is not essential to provide an insulating layer for the shield members 80 and 80a. In the case of this configuration, the shield members 80 and 80a can be configured to be fixed to the driver IC 7 via separate insulating layers (such as an insulating tape having adhesiveness on both surfaces).

[Electronics]
Next, an electronic device including the liquid crystal device 100 or 100a according to each of the above-described embodiments or any one of the liquid crystal devices according to the above-described modified examples (hereinafter, referred to as “liquid crystal device 1000” as a representative). A specific example of the device will be described with reference to FIG.

  First, an example in which the liquid crystal device 1000 according to the present invention is applied to a display unit of a portable personal computer (so-called notebook personal computer) will be described. FIG. 4A is a perspective view showing the configuration of this personal computer. As shown in the figure, a personal computer 710 includes a main body 712 having a keyboard 711 and a display 713 to which the liquid crystal device 1000 according to the present invention is applied.

  Next, an example in which the liquid crystal device 1000 according to the present invention is applied to a display unit of a mobile phone will be described. FIG. 4B is a perspective view showing the configuration of this mobile phone. As shown in the figure, a cellular phone 720 includes a plurality of operation buttons 721, a reception port 722, a transmission port 723, and a display unit 724 to which the liquid crystal device 1000 according to the present invention is applied.

  In addition, as an electronic device to which the liquid crystal device 1000 according to the present invention can be applied, in addition to the personal computer shown in FIG. 4A and the mobile phone shown in FIG. Monitor direct-view video tape recorders, car navigation devices, pagers, electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, digital still cameras, etc.

1 is a plan view of a liquid crystal device having a noise removal structure according to a first embodiment of the present invention. 1 is a cross-sectional view of a main part of a liquid crystal device having a noise removal structure according to a first embodiment. Sectional drawing of the principal part of the liquid crystal device which has the noise removal structure which concerns on 2nd Embodiment. FIG. 14 is a perspective view of an electronic device including the liquid crystal device of the invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 1st board | substrate, 1h mounting area | region, 2nd board | substrate, 7 driver IC (1st electronic component), 8 FPC (2nd electronic component), 10 1st support member (frame), 21 connection terminal (Terminal), 22 signal lines, 50 liquid crystal display panel (electro-optical panel), 51 illumination device, 80, 80a shield member, 81 conductive layer, 82 insulating layer, 83 conductive adhesive layer, 100, 100a liquid crystal device (electro-optical) apparatus)

Claims (8)

A frame having a conductive portion;
An electro-optic panel housed in the frame;
An electronic component mounted on a mounting region of the electro-optic panel,
A shield member having a conductive layer covering at least a part of the mounting region is in contact with the electronic component through an insulating layer, and the conductive layer of the shield member is electrically connected to the conductive portion of the frame. An electro-optical device.   The electro-optical device according to claim 1, wherein the conductive layer of the shield member is electrically connected to a reference potential. The electronic component includes a first electronic component and a second electronic component,
In the mounting region, the first electronic component, the second electronic component, and a terminal for electrically connecting the first electronic component and the second electronic component are disposed,
The said shielding member has covered the said 2nd electronic component of the side electrically connected with the said 1st electronic component and the said terminal, and the said terminal, The Claim 1 or 2 characterized by the above-mentioned. Electro-optic device. The shield member includes the conductive layer, the insulating layer disposed to overlap the conductive layer, and a conductive adhesive layer disposed to overlap a part of the conductive layer,
In the shield member, the insulating layer is fixed to the first electronic component with an adhesive or an adhesive tape, and the conductive adhesive layer is electrically connected to the conductive portion of the frame. The electro-optical device according to claim 3. The shield member includes the conductive layer, a conductive adhesive layer arranged to overlap the conductive layer, and the insulating layer arranged to partially overlap the conductive adhesive layer,
A part of the conductive adhesive layer is exposed from the insulating layer and is electrically connected to the conductive portion of the frame, and the insulating layer is bonded to the first electronic component with an adhesive or an adhesive. The electro-optical device according to claim 3, wherein the electro-optical device is fixed by a tape. The first electronic component is a driver IC that controls a display state of the electro-optical panel;
The second electronic component is a wiring board;
6. The electro-optical device according to claim 3, wherein a high frequency signal is input to the driver IC from the wiring board side through the terminal.   7. The electro-optical device according to claim 3, wherein at least a region of the shield member that overlaps with the first electronic component in a plan view has a light shielding property.   An electronic apparatus comprising the electro-optical device according to claim 1 as a display unit.

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