CN102014571A - Flexible printed circuit board and liquid crystal display device - Google Patents
Flexible printed circuit board and liquid crystal display device Download PDFInfo
- Publication number
- CN102014571A CN102014571A CN 201010514076 CN201010514076A CN102014571A CN 102014571 A CN102014571 A CN 102014571A CN 201010514076 CN201010514076 CN 201010514076 CN 201010514076 A CN201010514076 A CN 201010514076A CN 102014571 A CN102014571 A CN 102014571A
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- flexible printed
- wiring board
- printed wiring
- buffering area
- laminate
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Abstract
The invention discloses a flexible printed circuit (FPC) board and a liquid crystal display device. The flexible printed circuit board comprises a first layer plate and a second layer plate; the first layer plate comprises a first part and a second part; at least a partial area of the first part is overlapped with and fixed to at least a partial area of the second part to form an overlapped area; the overlapped area and the second part form an intersection; and opposite sides of the second part intersected with the intersection are provided with buffer areas. The buffer areas are arranged on both sides, intersected with the intersection, of the flexible printed circuit board; when the FPC is torn apart, the buffer areas firstly deform to buffer, and no stress is generated on the side edge so that a tearing force moves inwards from the side edge; the intersection can be carried up while tearing the FPC and the joint is not broken, thereby improving the quality of the flexible printed circuit board and prolonging the service life of the flexible printed circuit board.
Description
Technical field
The present invention is about a kind of flexible printed wiring board (FPC), relates in particular to a kind of flexible printed wiring board of tearing of preventing.
Background technology
Flexible printed wiring board (FPC) is one of modal assembly in the liquid crystal indicator.The quality of FPC design directly influences the product yield of entire module.See also Figure 1A-Fig. 1 C, Figure 1A is depicted as the schematic diagram of flexible printed wiring board in the prior art, and Figure 1B is depicted as along the generalized section of the AA line among Figure 1A, and Fig. 1 C is depicted as the schematic diagram that the flexible printed wiring board among Figure 1A tears off on module backlight.Flexible printed wiring board 9 comprises that first laminate 1 and second laminate, 2, the first laminates 1 comprise first 3 and second portion 4; At least overlapping and fixing formation overlay region, the subregion of the first 3 and second laminate 2, this overlay region and second portion 4 form junctions 5.And second portion 4 comprises line areas 7 and logicalnot circuit district 6, and logicalnot circuit district 6 is positioned at the relative dual-side of second portion 4.At present, for a lot of liquid crystal indicators, second laminate 2 is pasted and is fixed in the back side of module 8 backlight away from display panels, and second portion 4 reflexeds also are connected to display panels.Wherein, display panels and module backlight 8 are oppositely arranged, and module 8 backlight provides backlight for this display panels.Because FPC9 mostly is unsymmetric structure, and the bending district of FPC9 is that second portion 4 is single, double laminate junction, because the thickness that second portion 4 will be convenient to bend thereby require to bend the district as bending district is less, be generally the individual layer wiring board, so when heavy industry tears off FPC9, in the bending district of FPC9 or junction 5 stressed bigger sides or corner easily tear, thereby cause FPC9 to scrap.
Summary of the invention
Therefore, one of purpose of the present invention is to provide a kind of flexible printed wiring board and liquid crystal indicator, has buffering area with relative dual-side that the junction joins, so when tearing off FPC, because buffering area distortion buffering does not earlier produce stress at side and concentrates, make the power that tears off move toward in from lateral edges, just the junction can be taken up when tearing off FPC, and can not produce the phenomenon of splitting, thereby improve the quality of flexible printed wiring board and the useful life of prolongation flexible printed wiring board.
For reaching above-mentioned purpose, the invention provides a kind of flexible printed wiring board, this flexible printed wiring board comprises first laminate and second laminate, this first laminate comprises first and second portion; At least overlapping and fixing formation overlay region, the subregion of this first and this second laminate, this overlay region and this second portion form the junction, and this second portion has buffering area with the relative dual-side that this junction joins.
Further, this buffering area narrows down towards the end of this second portion away from this junction gradually from this junction.
Further, this buffering area has the wrinkle structure that the employing end face is the pressure head punching press formation of wavy or accordion-like.
Further, this buffering area adopts elastic material to make.
Further, this second portion integral body is elastic material.
Further, this overlay region has the width gradual change district, and this junction is between this width gradual change district and this second portion.
Further, this buffering area extends to this first from second portion, makes this buffering area be positioned at the relative dual-side of this first laminate, and this buffering area and this second laminate are underlapped.
Further, this second portion comprises this buffering area and line areas, and this buffering area is avoided this line areas setting.
Further, this second portion reflexed and be connected to display panels.
The present invention also provides a kind of liquid crystal indicator, and this liquid crystal indicator comprises display panels, module backlight, and aforesaid flexible printed wiring board.Module backlight provides backlight for this display panels; This second laminate is fixed in the back side of this module backlight away from this display panels, and this second portion reflexed also is connected to display panels.
Compared with prior art, flexible printed wiring board of the present invention has buffering area with relative dual-side that the junction joins, so when tearing off FPC, because buffering area distortion buffering earlier, do not produce stress at the buffering area of side and concentrate, make the power that tears off move toward in, just the junction can be taken up when tearing off FPC from lateral edges, and can not produce the phenomenon of splitting, thereby improve the quality of flexible printed wiring board and the useful life of prolongation flexible printed wiring board.
Can be about the advantages and spirit of the present invention by following detailed Description Of The Invention and appended graphic being further understood.
Description of drawings
Figure 1A is depicted as the schematic diagram of flexible printed wiring board in the prior art;
Figure 1B is depicted as along the generalized section of the AA line among Figure 1A;
Fig. 1 C is depicted as the schematic diagram that the flexible printed wiring board among Figure 1A tears off on module backlight;
Fig. 2 A is depicted as the schematic diagram according to first execution mode of flexible printed wiring board of the present invention;
Fig. 2 B is depicted as the schematic diagram that the FPC among Fig. 2 A tears off on module backlight;
Figure 3 shows that schematic diagram according to second execution mode of FPC of the present invention;
Figure 4 shows that schematic diagram according to the 3rd execution mode of FPC of the present invention;
Fig. 5 A is depicted as the schematic diagram according to the 4th execution mode of FPC of the present invention;
Fig. 5 B is depicted as the schematic diagram that the FPC among Fig. 5 A tears off on module backlight.
Embodiment
The invention provides a kind of liquid crystal indicator, this liquid crystal indicator comprises display panels, module backlight and flexible printed wiring board.Module backlight provides backlight for this display panels, and wherein display panels and module backlight are oppositely arranged.See also Fig. 2 A, Fig. 2 A is depicted as the schematic diagram according to first execution mode of flexible printed wiring board of the present invention.Flexible printed wiring board 10 comprises that first laminate 11 and second laminate, 12, the first laminates 11 comprise first 13 and second portion 14; At least overlapping and fixing formation overlay region 50, the subregion of the first 13 and second laminate 12, overlay region 50 forms junctions 15 with second portion 14, and second portion 14 has buffering area 17 with the relative dual-side 16,16 ' that junction 15 joins.And second laminate 12 is fixed in the back side of module backlight away from display panels 18, and second portion 14 reflexeds also are connected to display panels.Wherein, buffering area 17 for example has the wrinkle structure that the employing end face is the pressure head punching press formation of wavy or accordion-like, thereby makes buffering area 17 have certain elasticity or changeability amount; Perhaps, buffering area 17 directly adopts elastic material to make.And in the present embodiment, second portion 14 comprises buffering area 17 and line areas 19, and buffering area 17 is avoided line areas 19 and is provided with.
See also Fig. 2 B, Fig. 2 B is depicted as the schematic diagram that the FPC among Fig. 2 A tears off on module backlight.When for example needing on module 18 backlight, to tear off FPC, if employing stretched vertically, because the buffering area 17 of the second portion 14 of first laminate 11 has the sufficient elasticity deformation space, distortion buffering earlier, thereby do not produce stress at second portion 14 sides 16,16 ' buffering area 17 and concentrate, make the power that tears off move toward in, just junction 15 can be taken up when tearing off FPC, and can not produce the phenomenon of splitting from lateral edges.If adopt the side to stretch, force-bearing situation when the side 16 of the second portion 14 of FPC10,16 ' stretches in the side is more more harsh than stretched vertically condition, side 16,16 ' because of second portion 14 is wrinkle structure or elastic construction equally, buffering area 17 has the sufficient elasticity deformation space during stretching, and side 16,16 ' just is difficult for crack initiation like this.
In another execution mode, second portion 14 can integral body be an elastic material also.
See also Fig. 3, Figure 3 shows that schematic diagram according to second execution mode of FPC of the present invention.In the present embodiment, flexible printed wiring board 20 is similar to the flexible printed wiring board 10 in first execution mode, difference is, buffering area 27 25 narrows down towards the end of second portion 24 away from junction 25 gradually from the junction, promptly have the wrinkle structure or the elastic construction of gradual change width, thereby when tearing off FPC20, have better buffering effect.
See also Fig. 4, Figure 4 shows that schematic diagram according to the 3rd execution mode of FPC of the present invention.In the present embodiment, the difference of the flexible printed wiring board 10 in the flexible printed wiring board 30 and first execution mode is, the overlay region 39 of first laminate 31 and second laminate 32 has width gradual change district 38, and junction 35 is between width gradual change district 38 and this second portion 34.In the present embodiment, because the existence in width gradual change district 38, when FPC30 tore off on module 18 backlight, stress can concentrate on width gradual change district 38 earlier, thereby can form certain buffer capacity for junction 35.And it is same, because buffering area 37 has wrinkle structure or elastic construction, make when FPC30 tears off on module 18 backlight, buffering area 37 has the sufficient elasticity deformation space, distortion buffering earlier, thereby do not produce stress at the buffering area 37 of second portion 34 sides and concentrate, the power that tears off is moved toward in from lateral edges, just junction 35 can be taken up when tearing off FPC30, and can not produce the phenomenon of splitting.
See also Fig. 5 A and Fig. 5 B, Fig. 5 A is depicted as the schematic diagram according to the 4th execution mode of FPC of the present invention, and Fig. 5 B is depicted as the schematic diagram that the FPC among Fig. 5 A tears off on module backlight.In the present embodiment, the difference of the flexible printed wiring board 10 in the flexible printed wiring board 40 and first execution mode is, buffering area 47 extends to first 43 from second portion 44, thereby make buffering area 47 be positioned at the relative dual-side 46,46 ' of first laminate 41, and buffering area 47 and second laminate 42 are underlapped.That is in the present embodiment, buffering area 47 can not made any wrinkle structure or elastic construction, only is the relative dual-side 46,46 ' that the logicalnot circuit district on the second portion 44 of the prior art is prolonged or is extended to FPC.The realization of concrete technology for example when making FPC sheet material, is no longer made second laminate 42 at its relative dual-side 46,46 '.Thereby after buffering area 47 expanded relative dual-side 46,46 ' to, there was not single doubling plate junction 45 in dual-side 46,46 ' relatively, so when tearing off FPC40, it is concentrated that side is unstressed, side can be taken up and not crack initiation together.Certainly, in another execution mode, buffering area 47 also is provided with wrinkle structure or elastic construction described in the execution mode as described above.
Compared with prior art, flexible printed wiring board of the present invention has buffering area with relative dual-side that the junction joins, so when tearing off FPC, because buffering area is out of shape earlier buffering, do not produce stress at the buffering area of side and concentrate, so that the power that tears off is moved toward in from lateral edges, just side or junction can be taken up when tearing off FPC, and can not produce the phenomenon of splitting, thereby improve the quality of flexible printed wiring board and the service life of prolongation flexible printed wiring board.
Claims (10)
1. a flexible printed wiring board is characterized in that this flexible printed wiring board comprises
First laminate, this first laminate comprises first and second portion; And
Second laminate, overlapping and fixing formation overlay region, the subregion at least of this first and this second laminate, this overlay region and this second portion form the junction, and this second portion has buffering area with the relative dual-side that this junction joins.
2. flexible printed wiring board as claimed in claim 1 is characterized in that this buffering area narrows down towards the end of this second portion away from this junction gradually from this junction.
3. flexible printed wiring board as claimed in claim 1 or 2 is characterized in that this buffering area has the wrinkle structure that the employing end face is the pressure head punching press formation of wavy or accordion-like.
4. flexible printed wiring board as claimed in claim 1 is characterized in that this buffering area adopts elastic material to make.
5. flexible printed wiring board as claimed in claim 1 is characterized in that this second portion integral body is elastic material.
6. flexible printed wiring board as claimed in claim 1 it is characterized in that this overlay region has the width gradual change district, and this junction is between this width gradual change district and this second portion.
7. flexible printed wiring board as claimed in claim 1 is characterized in that this buffering area extends to this first from this second portion, makes this buffering area be positioned at the relative dual-side of this first laminate, and this buffering area and this second laminate are underlapped.
8. flexible printed wiring board as claimed in claim 1 is characterized in that this second portion comprises this buffering area and line areas, and this buffering area is avoided this line areas setting.
9. flexible printed wiring board as claimed in claim 1 is characterized in that this second portion reflexed and is connected to display panels.
10. a liquid crystal indicator is characterized in that this liquid crystal indicator comprises
Display panels;
Module backlight is for this display panels provides backlight; And
As any described flexible printed wiring board among the claim 1-8, this second laminate is fixed in the back side of this module backlight away from this display panels, and this second portion reflexed also is connected to display panels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010514076 CN102014571B (en) | 2010-10-08 | 2010-10-08 | Flexible printed circuit board and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010514076 CN102014571B (en) | 2010-10-08 | 2010-10-08 | Flexible printed circuit board and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102014571A true CN102014571A (en) | 2011-04-13 |
| CN102014571B CN102014571B (en) | 2013-01-09 |
Family
ID=43844505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010514076 Expired - Fee Related CN102014571B (en) | 2010-10-08 | 2010-10-08 | Flexible printed circuit board and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102014571B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765722A (en) * | 2019-03-05 | 2019-05-17 | 厦门天马微电子有限公司 | A kind of display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320498A (en) * | 1995-05-24 | 1996-12-03 | Advanced Display:Kk | Terminal connecting structure of liquid crystal display panel |
| JPH11184405A (en) * | 1997-12-22 | 1999-07-09 | Sanyo Electric Co Ltd | Liquid crystal display device |
| CN1392766A (en) * | 2001-06-06 | 2003-01-22 | 株式会社东芝 | Foldable electronic device and its flexible printed circuit board |
| TW201032678A (en) * | 2009-02-24 | 2010-09-01 | Chi Mei Optoelectronics Corp | Flexible circuit board and application thereof |
-
2010
- 2010-10-08 CN CN 201010514076 patent/CN102014571B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320498A (en) * | 1995-05-24 | 1996-12-03 | Advanced Display:Kk | Terminal connecting structure of liquid crystal display panel |
| JPH11184405A (en) * | 1997-12-22 | 1999-07-09 | Sanyo Electric Co Ltd | Liquid crystal display device |
| CN1392766A (en) * | 2001-06-06 | 2003-01-22 | 株式会社东芝 | Foldable electronic device and its flexible printed circuit board |
| TW201032678A (en) * | 2009-02-24 | 2010-09-01 | Chi Mei Optoelectronics Corp | Flexible circuit board and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765722A (en) * | 2019-03-05 | 2019-05-17 | 厦门天马微电子有限公司 | A kind of display device |
| CN109765722B (en) * | 2019-03-05 | 2021-11-19 | 厦门天马微电子有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102014571B (en) | 2013-01-09 |
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Granted publication date: 20130109 Termination date: 20201008 |
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| CF01 | Termination of patent right due to non-payment of annual fee |