WO2010058622A1 - Substrat souple et dispositif d’affichage comprenant ledit substrat - Google Patents

Substrat souple et dispositif d’affichage comprenant ledit substrat Download PDF

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Publication number
WO2010058622A1
WO2010058622A1 PCT/JP2009/062718 JP2009062718W WO2010058622A1 WO 2010058622 A1 WO2010058622 A1 WO 2010058622A1 JP 2009062718 W JP2009062718 W JP 2009062718W WO 2010058622 A1 WO2010058622 A1 WO 2010058622A1
Authority
WO
WIPO (PCT)
Prior art keywords
wiring
ground
flexible substrate
base
power supply
Prior art date
Application number
PCT/JP2009/062718
Other languages
English (en)
Japanese (ja)
Inventor
真介 横沼
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Priority to US13/124,415 priority Critical patent/US20110199741A1/en
Priority to CN2009801407648A priority patent/CN102187745A/zh
Publication of WO2010058622A1 publication Critical patent/WO2010058622A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H05K1/0224—Patterned shielding planes, ground planes or power planes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09727—Varying width along a single conductor; Conductors or pads having different widths

Definitions

  • the present invention relates to a flexible substrate and a display device including the same, and more particularly to a flexible substrate having wirings formed on both sides of a base and a display device including the same.
  • Patent Document 1 discloses a printed wiring base (base), a power pattern (power wiring) formed on an IC (Integrated Circuit) mounting surface of the printed wiring base, and a printed wiring so as to face the power pattern.
  • a printed wiring board having a ground pattern (ground wiring) formed on the back surface of a base material is disclosed.
  • the power pattern and the ground pattern can be electromagnetically coupled by forming the ground pattern on the back surface of the printed wiring substrate so as to face the power pattern. Thereby, unnecessary radiation generated from the power supply pattern (printed wiring board) can be reduced.
  • an electronic device including a display device such as a liquid crystal display device is known.
  • a display device such as a liquid crystal display device
  • Such an electronic device includes a display panel and a flexible substrate that is electrically connected to the display panel. And built-in.
  • the structure of the flexible substrate is the same as that of the printed wiring board disclosed in Patent Document 1.
  • the flexible substrate includes a flexible base, a power supply wiring formed on one surface of the base, and a ground wiring formed on the other surface of the base so as to face the power supply wiring. Constitute. Thereby, it is possible to reduce unnecessary radiation generated from the flexible substrate (electronic device).
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a flexible substrate capable of suppressing the disconnection of wiring while reducing unnecessary radiation, and the same. It is to provide a display device provided.
  • a flexible substrate has flexibility, a base including an inner side and an outer side which are inside in a curved state, A plurality of first wirings formed on the inner surface and a plurality of second wirings formed on the outer surface of the base so as to face the first wiring, one of the first wiring and the second wiring being
  • the second wiring is formed so that at least one of the width and the thickness is smaller than the first wiring.
  • a plurality of first wirings are provided on the inner side surface of the base, and a plurality of second wirings are provided on the outer side surface of the base so as to face the first wiring.
  • the first wiring and the second wiring can be electromagnetically coupled. Thereby, even when the other of the first wiring and the second wiring includes a signal wiring or a power wiring, unnecessary radiation generated from the other of the first wiring and the second wiring (signal wiring or power wiring) can be reduced. it can.
  • the second wiring formed on the outer surface can be easily extended. Thereby, disconnection of the second wiring can be suppressed.
  • the repulsive force when bending the base (flexible substrate) is large. It can be suppressed. That is, it can suppress that a base
  • the first wiring includes at least one of a signal wiring, a power supply wiring, and a ground wiring
  • the second wiring includes a ground wiring. If comprised in this way, at least 1 type of the signal wiring formed on the inner surface of a base
  • the second wiring formed on the outer surface of the base should be broken by bending the base, Since one wiring (signal wiring, power supply wiring, and ground wiring) is not disconnected, it is possible to prevent a flexible substrate, for example, a display panel from functioning.
  • a through hole is preferably formed in a portion of the base on one end side of the first wiring and the second wiring, and one end of the second wiring is formed in the through hole. It is pulled out to the inner side surface side of the substrate. If comprised in this way, both 1st wiring and 2nd wiring can be electrically connected to a display panel etc. easily, for example. Accordingly, when a current (signal) flows through the other of the first wiring and the second wiring, a feedback current (feedback signal) can easily flow through one of the first wiring and the second wiring (ground wiring). The first wiring and the second wiring can be easily electromagnetically coupled. As a result, unnecessary radiation generated from the other of the first wiring and the second wiring (signal wiring or power supply wiring) can be easily reduced.
  • the second wiring preferably includes a ground wiring, and one ends of the ground wiring are connected to each other.
  • the ground wiring can be drawn out to the inner surface side of the base body, so that the number of through holes for drawing the ground wiring to the inner side surface of the base body can be suppressed. It is possible to suppress the increase in the space for forming the through hole. Thereby, the ground wiring can be easily pulled out to the inner side surface side of the base.
  • a solid ground pattern may be formed on the base, and the other end of the ground wiring may be connected to the solid ground pattern.
  • a display device includes a flexible substrate having the above-described configuration and a display panel electrically connected to the flexible substrate. If comprised in this way, the display apparatus which can suppress that a wiring breaks, reducing unnecessary radiation can be obtained.
  • FIG. 2 is a perspective view illustrating a structure of a flexible substrate and a liquid crystal display panel according to an embodiment of the present invention illustrated in FIG. 1. It is the top view which showed the structure of the flexible substrate by one Embodiment of this invention shown in FIG.
  • FIG. 2 is an enlarged perspective view showing a wiring structure on an inner surface of a flexible substrate according to an embodiment of the present invention shown in FIG. 1. It is the enlarged view which showed the wiring structure on the outer surface of the flexible substrate by one Embodiment of this invention shown in FIG.
  • FIG. 6 is a cross-sectional view taken along the line 100-100 in FIG.
  • FIG. 6 is a cross-sectional view taken along line 200-200 in FIG. It is sectional drawing which showed the structure of the flexible substrate by the 1st modification of this invention. It is sectional drawing which showed the structure of the flexible substrate by the 2nd modification of this invention.
  • the liquid crystal display device 1 is an example of the “display device” in the present invention.
  • the liquid crystal display device 1 including the flexible substrate 10 according to an embodiment of the present invention is used in an electronic device such as a mobile phone.
  • the liquid crystal display device 1 includes a liquid crystal display panel 2, an upper polarizing plate 3 and a lower polarizing plate 4 that sandwich the liquid crystal display panel 2, and a back side (lower side) of the liquid crystal display panel 2.
  • the backlight device 20 arranged and the metal frame 5 covering the back side of the backlight device 20 are included.
  • the liquid crystal display panel 2 is an example of the “display panel” in the present invention.
  • the liquid crystal display panel 2 includes a transparent AM substrate (active matrix substrate) 2a, and a transparent counter substrate 2b disposed opposite to the AM substrate 2a and having a smaller area than the AM substrate 2a. It is out. Further, liquid crystal (not shown) is sealed between the AM substrate 2a and the counter substrate 2b.
  • the liquid crystal display panel 2 functions as a display panel by being illuminated by the backlight device 20 (see FIG. 1).
  • the liquid crystal display panel 2 is bonded (fixed) to the front surface of a frame 25 to be described later by an adhesive member 6 made of double-sided tape or the like.
  • a driving IC 7 and a flexible substrate 10 are attached to the front surface of the AM substrate 2a.
  • the flexible substrate 10 is flexible and includes an insulating substrate 11 having an inner side surface 11a (see FIG. 1) which is an inner side and an outer side surface 11b which is an outer side in a curved state (the state shown in FIG. 1). Contains.
  • the base 11 has a curved portion 11c (see FIGS. 1 and 3) that is curved in a state of being incorporated in the liquid crystal display device 1.
  • the wiring 12 includes a signal wiring 12a, a power supply wiring 12b, and a ground wiring 12c, and is arranged at a predetermined pitch in the A direction.
  • the wiring 12 is an example of the “first wiring” in the present invention.
  • the wiring 12 is formed so as to extend in the B direction across the curved portion 11 c of the base 11. An end portion on one side (B1 direction side) of the wiring 12 is electrically connected to a terminal (not shown) of the liquid crystal display panel 2.
  • ground wiring 13 is an example of the “second wiring” and the “ground wiring” in the present invention.
  • the plurality of ground wirings 13 are opposed to the plurality of wirings 12 (at least all the signal wirings 12 a and the power supply wirings 12 b) (see FIG. 6). In addition, it is formed on the outer surface 11 b of the base 11. That is, the ground wiring 13 is formed at a position directly behind the wiring 12.
  • the plurality of ground wirings 13 are arranged at the same pitch as the wirings 12 in the A direction as shown in FIG. Further, as shown in FIG. 5, the ground wiring 13 is formed so as to extend in the B direction across the curved portion 11 c of the base 11, similarly to the wiring 12.
  • the width W ⁇ b> 2 of the ground wiring 13 is smaller than the width W ⁇ b> 1 of the wiring 12 in the curved portion 11 c of the base 11.
  • the thickness T2 of the ground wiring 13 is the same as the thickness T1 of the wiring 12.
  • one ends (ends on the B1 direction side) of the ground wiring 13 are connected to each other.
  • one end (end on the B1 direction side) of the ground wiring 13 is formed on the one end side (B1 direction side) of the base body 11. It is drawn out to the inner surface 11a side of the base body 11 through the through hole 11d. That is, one end of the ground wiring 13 is connected to the ground wiring 12c of the wiring 12 through the through hole 11d. Thereby, both the wiring 12 and the ground wiring 13 are electrically connected to the liquid crystal display panel 2 (see FIG. 2).
  • the other end (end on the B2 direction side) of the ground wiring 13 is connected to the solid ground pattern 14.
  • the solid ground pattern 14 is formed from a region on the B2 direction side (the side opposite to the liquid crystal display panel 2) from the curved portion 11c to a connector member connection region 11e to which a connector member (not shown) is connected. .
  • a solid ground pattern 14 (ground wiring 13) and wiring 12 (signal wiring 12a, power supply wiring 12b, and ground wiring 12c) are electrically connected to a connector member (not shown).
  • the backlight device 20 is a sidelight type (edge light type) backlight device, and includes a plurality of LEDs (Light Emitting Diodes) 21 and a light incident surface on which light from the LEDs 21 is incident. It includes a light guide plate 22 having 22a, a plurality of optical sheets 23, a reflection sheet 24 arranged on the back side of the light guide plate 22, and a resin frame 25 for housing them.
  • LEDs Light Emitting Diodes
  • the plurality of LEDs 21 are fixed on the inner surface 11a of the base body 11 (flexible substrate 10) via the solder layer 26.
  • the light guide plate 22 has a function of emitting light from the LED 21 from the light incident surface 22a and emitting the light from the light emitting surface 22b toward the liquid crystal display panel 2 side.
  • the plurality of optical sheets 23 are disposed in contact with the light guide plate 22 and have a diffusion sheet 23a having a function of diffusing light, or a lower lens sheet 23b having a function of condensing light, disposed in front of the diffusion sheet 23a. And the upper lens sheet 23c.
  • the reflection sheet 24 has a function of reflecting the light emitted from the back surface of the light guide plate 22 and propagating it to the light guide plate 22 side.
  • the frame 25 houses a plurality of LEDs 21, a light guide plate 22, a plurality of optical sheets 23, and the like.
  • the plurality of signal wirings 12a and the power supply wirings 12b are provided on the inner side surface 11a of the base body 11, and are provided on the outer surface 11b of the base body 11 so as to face the signal wirings 12a and the power supply wirings 12b.
  • the signal wiring 12a, the power supply wiring 12b, and the ground wiring 13 can be electromagnetically coupled. Thereby, unnecessary radiation generated from the signal wiring 12a and the power supply wiring 12b can be reduced.
  • the base 11 (flexible substrate 10) is bent by making the width W2 of the ground wiring 13 smaller than the width W1 of the wiring 12 in the bending portion 11c of the base 11.
  • the ground wiring 13 formed on the outer surface 11b can be easily extended. Thereby, it is possible to prevent the ground wiring 13 from being disconnected.
  • the repulsive force when bending the base 11 (flexible substrate 10) is increased by making the width W2 of the ground wiring 13 smaller than the width W1 of the wiring 12. Can be suppressed. That is, it can suppress that the base
  • the signal line 12a and the power supply line 12b are provided on the inner side surface 11a of the base body 11, and the ground wiring 13 is provided on the outer side surface 11b of the base body 11, thereby bending the base body 11.
  • the signal wiring 12a and the power wiring 12b are not disconnected. It is possible to prevent the display device 1) from functioning.
  • one end of the ground wiring 13 is pulled out to the inner side surface 11a side of the base body 11 through the through hole 11d, whereby both the wiring 12 and the ground wiring 13 are displayed on the liquid crystal display.
  • the panel 2 can be easily electrically connected. Thereby, when a current (signal) flows through the wiring 12 (signal wiring 12a and power supply wiring 12b), a feedback current (feedback signal) can be easily passed through the ground wiring 13, so that the wiring 12 (signal wiring 12a and The power supply wiring 12b) and the ground wiring 13 can be easily electromagnetically coupled. As a result, unnecessary radiation generated from the wiring 12 (the signal wiring 12a and the power supply wiring 12b) can be easily reduced.
  • the ground wiring 13 can be pulled out to the inner surface 11a side of the base 11 in a state of being gathered.
  • the display device is applied to a liquid crystal display device.
  • the present invention is not limited thereto, and may be applied to a display device other than the liquid crystal display device.
  • the flexible substrate is connected to the liquid crystal display panel.
  • the present invention is not limited to this, and the flexible substrate may be connected to a member other than the liquid crystal display panel.
  • the ground wiring 13 formed on the outer side surface 11 b of the base 11 is formed so as to have a smaller width than the wiring 12 formed on the inner side surface 11 a of the base 11.
  • the present invention is not limited to this.
  • the first modification of the present invention shown in FIG. 8 or the second modification of the present invention shown in FIG. 9 may be used. That is, as shown in FIG. 8, in the bending portion 11c, the ground wiring 113 formed on the outer side surface 11b of the base body 11 has a smaller thickness than the wiring 12 formed on the inner side surface 11a of the base body 11. You may form so that it may become.
  • the width and thickness of the ground wiring 213 formed on the outer side surface 11 b of the base body 11 in the bending portion 11 c are compared with the wiring 12 formed on the inner side surface 11 a of the base body 11. Both may be formed to be small. In this case, disconnection of the ground wiring 213 when the base 11 (flexible substrate 10) is bent can be further suppressed.
  • the wiring 12 such as the signal wiring 12a and the power supply wiring 12b is formed on the inner side surface 11a of the base 11 and the ground wiring 13 is formed on the outer side surface 11b of the base 11 is shown.
  • the present invention is not limited to this, and the ground wiring 13 may be formed on the inner side surface 11 a of the base 11, and the wiring 12 such as the signal wiring 12 a and the power supply wiring 12 b may be formed on the outer side surface 11 b of the base 11.
  • through holes 11d are provided for each of the wirings 12 such as the signal wiring 12a and the power supply wiring 12b, and the wirings 12 such as the signal wiring 12a and the power supply wiring 12b are drawn out to the inner side surface 11a side of the base 11. Also good.
  • ground wiring 13 is formed on the outer surface 11b of the base 11 so as to face at least all the signal wirings 12a and the power supply wiring 12b has been described.
  • the ground wiring 13 may not be formed so as to face all the signal wirings 12a and the power supply wirings 12b. That is, the ground wiring 13 may be formed so as to face only the signal wiring 12a and the power supply wiring 12b that are concerned that unnecessary radiation is generated.
  • the wiring 12 formed on the inner side surface 11a of the base 11 is shown as an example configured by the signal wiring 12a, the power wiring 12b, and the ground wiring 12c.
  • the wiring 12 may be configured by only the signal wiring 12a and the power supply wiring 12b. That is, the ground wiring 12 c may not be provided on the inner side surface 11 a of the base 11.
  • a ground pattern may be separately formed around the through hole 11 d on the inner side surface 11 a of the base 11.
  • the present invention is not limited to this example, and signal wiring and power supply wiring may be provided in a part of the outer surface 11 b of the base 11, for example, in the solid ground pattern 14. That is, a part of the signal wiring 12a and the power supply wiring 12b formed on the inner side surface 11a of the base body 11 may be drawn out to the outer side surface 11b side of the base body 11 through the through hole. If comprised in this way, it is possible to ensure easily the space which attaches components, such as a capacitor
  • Liquid crystal display device 2 Liquid crystal display panel (display panel) DESCRIPTION OF SYMBOLS 10 Flexible substrate 11 Base

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Structure Of Printed Boards (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

L’invention concerne un substrat souple permettant d’éviter la déconnexion d’un câblage tout en limitant le rayonnement inutile. Ledit substrat souple (10) comprend un corps de base souple (11), une pluralité de lignes de câblage (12) formées sur la surface intérieure (11a) du corps de base, et une pluralité de lignes de câblage à la terre (13) formées sur la surface extérieure du corps de base de sorte que les lignes de câblage à la terre sont opposées aux lignes de câblage (12). Dans une partie incurvée (11c) du corps de base, les lignes de câblage à la terre présentent une largeur plus petite que celle des lignes de câblage (12).
PCT/JP2009/062718 2008-11-19 2009-07-14 Substrat souple et dispositif d’affichage comprenant ledit substrat WO2010058622A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/124,415 US20110199741A1 (en) 2008-11-19 2009-07-14 Flexible substrate and display device provided with same
CN2009801407648A CN102187745A (zh) 2008-11-19 2009-07-14 柔性基板以及具备该柔性基板的显示装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-295738 2008-11-19
JP2008295738 2008-11-19

Publications (1)

Publication Number Publication Date
WO2010058622A1 true WO2010058622A1 (fr) 2010-05-27

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PCT/JP2009/062718 WO2010058622A1 (fr) 2008-11-19 2009-07-14 Substrat souple et dispositif d’affichage comprenant ledit substrat

Country Status (3)

Country Link
US (1) US20110199741A1 (fr)
CN (1) CN102187745A (fr)
WO (1) WO2010058622A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017175085A (ja) * 2016-03-25 2017-09-28 住友金属鉱山株式会社 両面配線フレキシブル基板

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
KR102070195B1 (ko) * 2012-07-18 2020-01-29 삼성디스플레이 주식회사 표시 장치
CN107889344A (zh) * 2012-08-15 2018-04-06 深圳迈辽技术转移中心有限公司 软性电路板装置
JP6154208B2 (ja) * 2013-06-19 2017-06-28 矢崎総業株式会社 電圧検出ユニット
CN105027581B (zh) * 2014-02-27 2018-01-05 京瓷株式会社 压电致动器及具备其的压电振动装置、便携式终端、声音发生器、声音发生装置、电子设备
US11329037B2 (en) * 2020-06-17 2022-05-10 Wuhan China Star Optoelectronics Technology Co., Ltd. Display module and electronic device

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JPH11121881A (ja) * 1997-10-14 1999-04-30 Sumitomo Electric Ind Ltd フレキシブルプリント配線板
JPH11298094A (ja) * 1998-04-08 1999-10-29 Fuji Electric Co Ltd フレキシブルプリント配線板
JP2002151807A (ja) * 2000-11-08 2002-05-24 Saginomiya Seisakusho Inc 配線基板および圧力センサ
JP2003179317A (ja) * 2001-12-10 2003-06-27 Ngk Insulators Ltd フレキシブル配線板
JP2004079731A (ja) * 2002-08-15 2004-03-11 Nippon Mektron Ltd 可撓性回路基板
JP2004088020A (ja) * 2002-08-29 2004-03-18 Toshiba Corp フレキシブルプリント基板及び該基板を備えた電子機器

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KR100821042B1 (ko) * 2006-09-22 2008-04-08 삼성에스디아이 주식회사 액정표시장치 및 이를 이용한 휴대용 표시기기

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Publication number Priority date Publication date Assignee Title
JPH11121881A (ja) * 1997-10-14 1999-04-30 Sumitomo Electric Ind Ltd フレキシブルプリント配線板
JPH11298094A (ja) * 1998-04-08 1999-10-29 Fuji Electric Co Ltd フレキシブルプリント配線板
JP2002151807A (ja) * 2000-11-08 2002-05-24 Saginomiya Seisakusho Inc 配線基板および圧力センサ
JP2003179317A (ja) * 2001-12-10 2003-06-27 Ngk Insulators Ltd フレキシブル配線板
JP2004079731A (ja) * 2002-08-15 2004-03-11 Nippon Mektron Ltd 可撓性回路基板
JP2004088020A (ja) * 2002-08-29 2004-03-18 Toshiba Corp フレキシブルプリント基板及び該基板を備えた電子機器

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Publication number Priority date Publication date Assignee Title
JP2017175085A (ja) * 2016-03-25 2017-09-28 住友金属鉱山株式会社 両面配線フレキシブル基板

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US20110199741A1 (en) 2011-08-18
CN102187745A (zh) 2011-09-14

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