CN105242427B - COF flexible circuit board - Google Patents
COF flexible circuit board Download PDFInfo
- Publication number
- CN105242427B CN105242427B CN201510706374.XA CN201510706374A CN105242427B CN 105242427 B CN105242427 B CN 105242427B CN 201510706374 A CN201510706374 A CN 201510706374A CN 105242427 B CN105242427 B CN 105242427B
- Authority
- CN
- China
- Prior art keywords
- circuit board
- flexible circuit
- cof flexible
- cof
- display panel
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Structure Of Printed Boards (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a kind of COF flexible circuit board, one end of COF flexible circuit board is connect with liquid crystal display panel, the other end is connect with printed circuit board, the bending of COF flexible circuit board is so that printed circuit board is placed in the back side of backlight module, COF flexible circuit board includes cabling area and non-cabling area, and the non-cabling area near COF flexible circuit board maximum bending part is equipped with several slits or notch.The present invention by the way that slit or notch are arranged on COF flexible circuit board, or by COF flexible circuit board design be it is trapezoidal, make COF flexible circuit board warping resistance, it is bad to avoid the circuit breaker as caused by the damage of COF flexible circuit board frangibility.
Description
Technical field
The invention belongs to liquid crystal display device field more particularly to a kind of COF flexible circuit boards.
Background technique
Currently, liquid crystal display panel is widely used, charge required for liquid crystal display panel pixel driver and control letter
Number, it both is from external pcb board (printed circuit board), it need to be by COF (Chip On Film, flip chip encapsulation) flexible electrical
Road plate is transferred in liquid crystal display panel.As shown in Figure 1,10 one end of COF flexible circuit board is connect with liquid crystal display panel 20, the other end with
Pcb board 30 connects.When liquid crystal display panel assembles, need to be added the backlight module 40 of offer light source, and 10 plate of COF flexible circuit is rolled over
It is curved, pcb board 30 is placed in the back side of backlight module 40, as shown in Figure 2.When COF flexible circuit version bending, bending angle is most
General goal, inside are squeezed stress maximum, and outside is stretched stress maximum, therefore COF flexible circuit board bending angle is maximum
Place is easy to fracture damage to cause circuit breaker.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of COF flexible circuit board, one end of COF flexible circuit board and liquid
Crystal panel connection, the other end are connect with printed circuit board, and the bending of COF flexible circuit board is so that printed circuit board is placed in backlight module
The back side, COF flexible circuit board includes cabling area and non-cabling area, the non-cabling near COF flexible circuit board maximum bending part
Area is equipped with several slits or notch.
Further, the slit is cut by tool；
Further, the notch is made of punching press in punching processing procedure；
Further, the slit or notch are located at maximum bending part and are symmetrical arranged；
Further, the horizontal distance of the slit or notch is less than or equal to the width in non-cabling area；
Further, the shape of the notch is triangle or semicircle；
Further, the COF flexible circuit board is trapezoidal, and trapezoidal long side is connect with printed circuit board, short side
It is connect with liquid crystal display panel.
The utility model has the advantages that the present invention is on COF flexible circuit board by being arranged slit or notch, or by COF flexible circuit
Plate is designed as trapezoidal, makes COF flexible circuit board warping resistance, avoids the electricity as caused by the damage of COF flexible circuit board frangibility
Road open circuit is bad.
Detailed description of the invention
Fig. 1 is COF flexible circuit board connection liquid crystal display panel and PCB schematic diagram；
Fig. 2 is COF flexible circuit board bending assembling schematic diagram；
Fig. 3 is slit location schematic diagram on COF flexible circuit board of the present invention；
Fig. 4 is gap position schematic diagram on COF flexible circuit board of the present invention；
Fig. 5 is COF flexible circuit connection relationship diagram in curved-surface display；
Fig. 6 is three schematic diagram of COF flexible circuit board embodiment of the present invention；
Fig. 7 is geometrical relationship figure when COF flexible circuit board assembles in Fig. 5.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after having read the present invention, those skilled in the art are to of the invention various
The modification of equivalent form falls within the application range as defined in the appended claims.
Usual COF flexible circuit board one end is connect with liquid crystal display panel, and the other end is connect with printing board PCB, on pcb board
Control signal liquid crystal display panel is passed to by COF flexible circuit board.When liquid crystal display panel assembles, need to be added the back of offer light source
Optical mode group, and by COF flexible circuit board bending, pcb board is placed in the back side of backlight module.COF flexible circuit version bending
When, bending angle maximum, inside is squeezed stress maximum, and outside is stretched stress maximum, it is easy to and fracture damage, because
This present invention provides a kind of COF flexible circuit board.Fig. 3 is the embodiment one of COF flexible circuit board of the present invention, as shown, COF
Flexible circuit board 100 includes cabling area 101 and non-cabling area 102, and deflection is maximum when being the bending of COF flexible circuit board at dotted line
Place and bending angle maximum, referred to as maximum deflection line 103, the non-cabling area 102 near maximum deflection line 103
Several slits 104 are cut off, the position of slit 104 is symmetrical about maximum deflection line 103.Slit 104 is cut by tool, slit
104 width is less than or equal to the width D in non-cabling area 102.Fig. 4 is COF flexible circuit board embodiment two of the present invention, and COF is flexible
Circuit board 200 include cabling area 201 and non-cabling area 202 and embodiment one the difference is that, near maximum deflection line 203
Non- cabling area 202 notch 204 is set, the position of notch 204 is symmetrical about maximum deflection line 203, and notch 204 is by punching processing procedure
Middle punching press is made, and the shape of notch 204 can be triangle or semicircle, and the horizontal distance of notch 204 is less than or equal to non-cabling
The width D in area.
When liquid crystal display is flexible displays, liquid crystal display panel side radius of curvature is small, and the side PCB radius of curvature is big, such as
Fruit PCB remains as rectangle, if appropriate in liquid crystal display panel side, is necessarily pullled in the side PCB.To solve the above problems,
The present invention proposes a kind of trapezoidal COF flexible circuit board.Fig. 5 to Fig. 7 is the embodiment three of COF flexible circuit board of the present invention, COF
Flexible circuit board 300 be it is trapezoidal, trapezoidal long side L1 is connect with printed circuit board, and short side L2 is connect with liquid crystal display panel, COF
300 vertical-direction length of flexible circuit board is H, if the radius of curvature of flexible displays is R, COF flexible circuit board is corresponding
Angle is θ, then L1=L2+H θ.
The present invention is ladder by the way that slit or notch are arranged on COF flexible circuit board, or by COF flexible circuit board design
Shape makes COF flexible circuit board warping resistance, and it is bad to avoid the circuit breaker as caused by the damage of COF flexible circuit board frangibility.
Claims (1)
- One end of 1.COF flexible circuit board, COF flexible circuit board is connect with liquid crystal display panel, and the other end is connect with printed circuit board, The bending of COF flexible circuit board is so that printed circuit board is placed in the back side of backlight module, it is characterised in that:The COF flexible circuit board be it is trapezoidal, trapezoidal long side connect with printed circuit board, short side and liquid crystal display panel company It connects；The radius of curvature of liquid crystal display panel side is less than the radius of curvature of printed circuit board side；COF flexible circuit board vertical direction is long Degree is H, and the liquid crystal display panel is curved face display panel, and the radius of curvature of the liquid crystal display panel is R, the length of COF flexible circuit board The length of avris is L1, and the length of the short side of COF flexible circuit board is L2, and the length of the short side is right when radius is R The angle radian answered is θ；The COF flexible circuit board meets: L1=L2+H* θ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706374.XA CN105242427B (en) | 2015-10-27 | 2015-10-27 | COF flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510706374.XA CN105242427B (en) | 2015-10-27 | 2015-10-27 | COF flexible circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105242427A CN105242427A (en) | 2016-01-13 |
| CN105242427B true CN105242427B (en) | 2019-06-11 |
Family
ID=55040117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510706374.XA Active CN105242427B (en) | 2015-10-27 | 2015-10-27 | COF flexible circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105242427B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265445B (en) * | 2019-06-21 | 2021-09-21 | 京东方科技集团股份有限公司 | Display device and electronic device |
| CN113125280B (en) * | 2021-03-29 | 2024-01-02 | 合肥颀材科技有限公司 | Calculation method for bending resistance test of finished product COF Film |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004029651A (en) * | 2002-06-28 | 2004-01-29 | Optrex Corp | Liquid crystal display element |
| CN1532608A (en) * | 2003-03-20 | 2004-09-29 | Nec液晶技术株式会社 | Liquid crystal display device |
| CN101165553A (en) * | 2006-10-16 | 2008-04-23 | 龙腾光电（控股）有限公司 | Mounting film for liquid crystal drive chip and method for manufacturing the same |
| JP2009049079A (en) * | 2007-08-15 | 2009-03-05 | Epson Imaging Devices Corp | Flexible printed board and electronic device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998043227A1 (en) * | 1997-03-24 | 1998-10-01 | Seiko Epson Corporation | Wiring board, and display device and electronic equipment using the same |
| KR20070080049A (en) * | 2006-02-06 | 2007-08-09 | 삼성전자주식회사 | Signal transmission film and display device including the same |
| JP2008135465A (en) * | 2006-11-27 | 2008-06-12 | Funai Electric Co Ltd | Flexible wiring board and liquid crystal display with flexible wiring board |
| JP4360405B2 (en) * | 2007-01-05 | 2009-11-11 | エプソンイメージングデバイス株式会社 | Electro-optical device and electronic apparatus |
| KR101700701B1 (en) * | 2010-09-24 | 2017-02-14 | 삼성전자 주식회사 | Apparatus for displaying image |
| JP2013115259A (en) * | 2011-11-29 | 2013-06-10 | Funai Electric Co Ltd | Chip on film and manufacturing method of the same |
-
2015
- 2015-10-27 CN CN201510706374.XA patent/CN105242427B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004029651A (en) * | 2002-06-28 | 2004-01-29 | Optrex Corp | Liquid crystal display element |
| CN1532608A (en) * | 2003-03-20 | 2004-09-29 | Nec液晶技术株式会社 | Liquid crystal display device |
| CN101165553A (en) * | 2006-10-16 | 2008-04-23 | 龙腾光电（控股）有限公司 | Mounting film for liquid crystal drive chip and method for manufacturing the same |
| JP2009049079A (en) * | 2007-08-15 | 2009-03-05 | Epson Imaging Devices Corp | Flexible printed board and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105242427A (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3244385B1 (en) | Display substrate, display panel, and display device | |
| US10078234B2 (en) | Liquid crystal display device | |
| CN105404063B (en) | For the driving printed circuit board of display device and with its display device | |
| CN106647070A (en) | Display panel and display device | |
| US10113944B2 (en) | Circuit board testing apparatus and circuit board testing method | |
| CN102595845A (en) | Printed circuit board component fixing mechanism and liquid crystal displayer thereof | |
| CN204302618U (en) | A kind of display device | |
| CN105636340A (en) | Flexible circuit board and display device | |
| CN105242427B (en) | COF flexible circuit board | |
| US9583855B2 (en) | Circuit board device and display apparatus | |
| CN204302615U (en) | A kind of display unit | |
| CN106547139B (en) | A kind of liquid crystal display panel and liquid crystal display device | |
| CN104049390B (en) | Display module and display device | |
| CN110376776A (en) | A kind of display panel and display device | |
| US10247986B2 (en) | Backlight module | |
| US20180173041A1 (en) | Display module and display device | |
| US10726753B2 (en) | Array substrate and array substrate testing structure | |
| CN206725910U (en) | A kind of display device | |
| US20190072804A1 (en) | Display device | |
| US10018772B2 (en) | Position-limiting structure for backlight module, backlight module and display device | |
| CN107393948A (en) | Center and flexible display apparatus for fixing flexible display panel | |
| CN108877545A (en) | Display device | |
| KR20150111545A (en) | Display device | |
| CN203643707U (en) | LCD module and LCD device | |
| CN203025363U (en) | Optical film, backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |