CN103293725A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
CN103293725A
CN103293725A CN201210208928XA CN201210208928A CN103293725A CN 103293725 A CN103293725 A CN 103293725A CN 201210208928X A CN201210208928X A CN 201210208928XA CN 201210208928 A CN201210208928 A CN 201210208928A CN 103293725 A CN103293725 A CN 103293725A
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CN
China
Prior art keywords
circuit board
printed circuit
flexible printed
liquid crystal
folding portion
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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.)
Granted
Application number
CN201210208928XA
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Chinese (zh)
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CN103293725B (en
Inventor
刘健
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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Priority to CN201210208928.XA priority Critical patent/CN103293725B/en
Priority to PCT/CN2012/086589 priority patent/WO2013189157A1/en
Publication of CN103293725A publication Critical patent/CN103293725A/en
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Publication of CN103293725B publication Critical patent/CN103293725B/en
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    • 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
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/147—Structural association of two or more printed circuits at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit
    • 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
    • H05K2201/09009—Substrate related
    • H05K2201/09081—Tongue or tail integrated in planar structure, e.g. obtained by cutting from the planar structure
    • 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
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H05K2201/10136—Liquid Crystal display [LCD]
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/361—Assembling flexible printed circuits with other printed circuits

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

Abstract

The invention discloses a liquid crystal display device, which comprises a liquid crystal display module and a backlight module, wherein a split edge is arranged on a first flexible printed circuit board of the liquid crystal display module; at least one folding part is formed by the limitation of the split edge, and is a first subsidiary folding part; and the free end of the first subsidiary folding part is folded to be electrically connected with a second flexible printed circuit board of the backlight module, so that binding of the liquid crystal display module and the backlight module is realized. The first subsidiary folding part is equivalent to a part taking the shape of an Arabic numeral one of a conventional T-shaped or L-shaped second flexible printed circuit board; and the second flexible printed circuit board of the liquid crystal display device is equivalent to the line-shaped part of a conventional T-shaped or L-shaped second flexible printed circuit board; as the second flexible printed circuit board is formed by once cutting, and has a high typesetting rate of a flexible printed circuit board, the cost of raw materials is reduced; and besides, the second flexible printed circuit board is not formed by welding, so that the risks of short circuit or interruption of a circuit, and the reliability of circuit connection is improved.

Description

Liquid crystal indicator
Technical field
The invention belongs to field of liquid crystal display, particularly relate to a kind of liquid crystal indicator.
Background technology
Liquid crystal indicator is with liquid crystal display module and module backlight configuration all-in-one-piece device, advantage such as it has low diathermaneity, volume is frivolous and power consumption is low has been widely used in fields such as mobile phone, personal digital assistant, notebook computer, PC and TV.
Fig. 1 is the structure diagram of liquid crystal display module in the liquid crystal indicator, as shown in Figure 1, liquid crystal display module 1 comprises liquid crystal panel 2, is arranged on the liquid crystal panel 2 and the driving circuit 3 that is electrically connected with liquid crystal panel 2 and first flexible printed circuit board (Flexible Printed Circuit is called for short FPC) 4 that is electrically connected with liquid crystal panel 2.Driving circuit 3 is an integrated circuit (IC) chip, and it provides the driving signal for liquid crystal panel 2.First flexible printed circuit board 4 often is called as main flexible printed circuit board, one end 4a is electrically connected with liquid crystal panel 2, other end 4b is provided with Data Input Interface 41 and is connected with external circuit, and external signal provides data to drive liquid crystal panel 2 work for driving circuit 3 by Data Input Interface 41.
Fig. 2 is the structure diagram of module backlight in the liquid crystal indicator, as shown in Figure 2, module 5 backlight comprises glue frame 6 backlight, is arranged on second flexible printed circuit board 7 on the glue frame 6 backlight and is arranged on second flexible printed circuit board 7 and the light source 8 that is electrically connected with second flexible printed circuit board 7.Second flexible printed circuit board 7 often is called as secondary flexible printed circuit board, and light source 8 provides required light for liquid crystal panel shown in Figure 12.In conjunction with Fig. 1, shown in Figure 2, first flexible printed circuit board 4 and second flexible printed circuit board 7 are to utilize cutting technique to be made respectively.
In conjunction with Fig. 1, shown in Figure 2, second flexible printed circuit board 7 is L type or T type (among the figure be example with the T type) mostly, first flexible printed circuit board 4 in the liquid crystal display module 1 and second flexible printed circuit board, 7 ends 71 in the module 5 backlight are linked together, can form liquid crystal display module (Liquid Crystal Module is called for short LCM).
Second flexible printed circuit board 7 can utilize dual mode to be made: mode one, L type or T type second flexible printed circuit board 7 once cut and form, but this composing rate that will certainly cause opening greatly flexible printed circuit board is lower, namely at a big negligible amounts that can cut out second flexible printed circuit board of L type or T type on the flexible printed circuit board of opening, cause the raw materials cost of second flexible printed circuit board higher; Mode two, for the composing rate that improves flexible printed circuit board to reduce the raw materials cost of second flexible printed circuit board, as shown in Figure 3, second flexible printed circuit board 7 cuts at twice, two cutting parts are respectively the 7a that is " | " type and are the 7b of " one " font, and then with two cutting part 7a, thereby 7b welds together and forms complete L type or T type second flexible printed circuit board 7, cutting part 7a is electrically connected with first flexible printed circuit board 4 shown in Figure 1, but this will certainly make second flexible printed circuit board 7 increase by one welding sequence, and second flexible printed circuit board 7 is to be welded, existence causes the risk of short circuit or interruption because of failure welding, and the reliability that circuit connects is not high.
Summary of the invention
The technical problem to be solved in the present invention is to improve flexible printed circuit board composing rate with when reducing the second flexible printed circuit board raw materials cost, avoids second flexible printed circuit board to take place because failure welding causes the not high problem of circuit connection reliability.
For addressing the above problem, the invention provides a kind of liquid crystal indicator, comprising:
The liquid crystal display module, described liquid crystal display module comprises liquid crystal panel and first flexible printed circuit board that is electrically connected with described liquid crystal panel, the folding portion that described first flexible printed circuit board is provided with segmentation side and is limited by described segmentation side, described folding portion has free end, stiff end, and described folding portion comprises the first sub-folding portion at least;
Module backlight, described module backlight comprise light source and second flexible printed circuit board that is electrically connected with described light source or embossing seal printed circuit board, and the free end of the described first sub-folding portion is electrically connected with described second flexible printed circuit board or embossing seal printed circuit board.
Alternatively, the L-shaped or rectangle of described folding portion.
Alternatively, described second flexible printed circuit board is " one " font.
Alternatively, described light source is LED.
Alternatively, the free end of described LED and the described first sub-folding portion is arranged at the opposite two sides of described second flexible printed circuit board respectively.
Alternatively, the free end of described second flexible printed circuit board or embossing seal printed circuit board and the described first sub-folding portion welds together.
Alternatively, described second flexible printed circuit board or embossing seal printed circuit board are provided with first golden finger, and the free end of the described first sub-folding portion is provided with second golden finger, and described first golden finger, second golden finger are electrically connected.
Alternatively, described liquid crystal indicator also comprises touch-screen and the 3rd flexible printed circuit board that is electrically connected with described touch-screen, described folding portion also comprises the second sub-folding portion, and the free end of the described second sub-folding portion is electrically connected with described the 3rd flexible printed circuit board.
Alternatively, the free end of described the 3rd flexible printed circuit board and the described second sub-folding portion welds together.
Alternatively, described the 3rd flexible printed circuit board is provided with the 3rd golden finger, and the free end of the described second sub-folding portion is provided with the 4th golden finger, and described the 3rd golden finger, the 4th golden finger are electrically connected.
Alternatively, described segmentation side is provided with crack arrest portion at the stiff end place of described folding portion.
Alternatively, the width of described folding portion is more than or equal to 1mm.
Alternatively, the free end length of the described first sub-folding portion is less than or equal to the free end length of described first flexible printed circuit board.
Compared with prior art, the present invention has the following advantages:
Liquid crystal indicator provided by the present invention comprises liquid crystal display module and module backlight, first flexible printed circuit board in the liquid crystal display module is provided with segmentation side, make folding portion by described division margin, the quantity of folding portion is at least one, it is the first sub-folding portion, the free end of the first sub-folding portion is turned down and can be electrically connected with second flexible printed circuit board in the module backlight, realized the binding of liquid crystal display module and module backlight.The first sub-folding portion is equivalent to " | " type part in existing T type or L type second flexible printed circuit board, and second flexible printed circuit board among the present invention is equivalent to " one " font part in existing T type or L type second flexible printed circuit board, because second flexible printed circuit board is once to cut to form and have a higher flexible printed circuit board composing rate, reduced the raw materials cost of second flexible printed circuit board, in addition, second flexible printed circuit board is not welded, the risk that can not have short circuit or interruption has improved the reliability that circuit connects.
In addition, folding portion also can comprise the second sub-folding portion, for first flexible printed circuit board with being connected of other circuit board provide an interface channel in the liquid crystal indicator, to realize being electrically connected of first flexible printed circuit board and other circuit board, during concrete the application, the free end of the second sub-folding portion can be turned down, to be connected to other circuit board, like this, other circuit board can be arranged to comparatively simple shape, as " one " font, when other circuit board is flexible printed circuit board, can improve the composing rate of flexible printed circuit board, reduce the raw materials cost of other circuit board.As wherein a kind of application, described other circuit board can be the flexible printed circuit board that is electrically connected with touch-screen.
Description of drawings
Fig. 1 is the structure diagram of liquid crystal display module in the liquid crystal indicator;
Fig. 2 is the structure diagram of module backlight in the liquid crystal indicator;
Fig. 3 is the synoptic diagram of a kind of second flexible printed circuit board in the module backlight shown in Figure 2;
Fig. 4 is the structure diagram of liquid crystal display module in one embodiment of the present of invention;
Fig. 5 is the synoptic diagram one of first flexible printed circuit board in the liquid crystal display module shown in Figure 4;
Fig. 6 is the synoptic diagram two of first flexible printed circuit board in the liquid crystal display module shown in Figure 4;
Fig. 7 is the synoptic diagram three of first flexible printed circuit board in the liquid crystal display module shown in Figure 4;
Fig. 8 is the structure diagram of module backlight in one embodiment of the present of invention;
Fig. 9 is the synoptic diagram that first flexible printed circuit board is electrically connected with second flexible printed circuit board;
Figure 10 is the structure diagram of liquid crystal indicator in the another embodiment of the present invention.
Embodiment
As previously mentioned, the technical problem to be solved in the present invention is to improve flexible printed circuit board composing rate with when reducing the second flexible printed circuit board raw materials cost, avoids second flexible printed circuit board to take place because failure welding causes the not high problem of circuit connection reliability.
For addressing the above problem, the inventor proposes, first flexible printed circuit board in the liquid crystal display module arranges segmentation side, make folding portion by described division margin, described folding portion has free end, stiff end, the free end of folding portion is turned down and can be electrically connected with second flexible printed circuit board in the module backlight, realized the binding of liquid crystal display module and module backlight.Described folding portion is equivalent to " | " type part in existing T type or L type second flexible printed circuit board, and second flexible printed circuit board among the present invention is equivalent to " one " font part in existing T type or L type second flexible printed circuit board, because second flexible printed circuit board is once to cut to form and have a higher flexible printed circuit board composing rate, reduced the raw materials cost of second flexible printed circuit board, in addition, second flexible printed circuit board is not welded, the risk that can not have short circuit or interruption has improved the reliability that circuit connects.
Below in conjunction with accompanying drawing, by specific embodiment, technical scheme of the present invention is carried out clear, complete description, obviously, described embodiment only is the part of embodiment of the present invention, rather than they are whole.According to these embodiment, those of ordinary skill in the art belongs to protection scope of the present invention need not obtainable all other embodiments under the prerequisite of creative work.
Fig. 4 is the structure diagram of liquid crystal display module in one embodiment of the present of invention, and as shown in Figure 4, liquid crystal display module 100 comprises liquid crystal panel 110 and first flexible printed circuit board 120 that is electrically connected with liquid crystal panel 110.First flexible printed circuit board 120 has the stiff end 120a that is electrically connected with liquid crystal panel 110 and the free end 120b that is connected with external circuit, can be crimped on the surface of liquid crystal panel 110 by the stiff end 120a of anisotropic conductive film (ACF) with first flexible printed circuit board 120, realize both electrical connections, make electric signal can be sent to liquid crystal panel 110.The free end 120b of first flexible printed circuit board 120 is provided with Data Input Interface P, external circuit can provide first signal to liquid crystal panel 110 by first flexible printed circuit board 120 like this, and described first signal comprises scanning drive signal, data drive signal, clock signal etc.
Liquid crystal display module 100 also comprises driving circuit (integrated circuit (IC) chip) 130, in one embodiment of the invention, driving circuit 130 is arranged on the liquid crystal panel 110, can adopt glass flip chip structure (Chip On Glass, be called for short COG), by anisotropic conductive film driving circuit 130 is connected to liquid crystal panel 110, and then realizes being electrically connected of liquid crystal panel 110 and driving circuit 130.The peripheral circuit of driving circuit 130 and electronic component (not shown) need be placed on first flexible printed circuit board 120, described electronic component mainly comprises electric capacity, resistance, diode etc., and these electronic components are electrically connected to driving circuit 130 by the cabling (not shown) on first flexible printed circuit board 120.
Fig. 5 is the synoptic diagram one of first flexible printed circuit board in the liquid crystal display module shown in Figure 4, Fig. 6 is the synoptic diagram two of first flexible printed circuit board in the liquid crystal display module shown in Figure 4, Fig. 7 is the synoptic diagram three of first flexible printed circuit board in the liquid crystal display module shown in Figure 4, as Fig. 5, Figure 6 and Figure 7, first flexible printed circuit board 120 is provided with segmentation side 121, limit folding portion 122(by segmentation side 121 and comprise the first sub-folding portion 122a, the second sub-folding portion 122b), because segmentation side 121 is non-enclosed, therefore, the folding portion 122 that is limited by segmentation side 121 can turn down.Folding portion 122 have among the stiff end 1221(figure dot) and free end 1222, stiff end 1221 is arranged on first flexible printed circuit board 120, free end 1222 can be around 120 turnovers of first flexible printed circuit board.Utilize cutting die die-cut or cutting on a flexible printed circuit board to form after first flexible printed circuit board 120, recycling cutting die is die-cut or cut out segmentation side 121 on first flexible printed circuit board 120.What those skilled in the art should know is that segmentation side 121 should be arranged on the non-cabling zone of first flexible printed circuit board 120.
Folding portion 122 can L-shaped (shown in the first sub-folding portion 122a among Fig. 5 and Fig. 6) or rectangle (shown in the second sub-folding portion 122b among Fig. 5, Fig. 6 and Fig. 7 or shown in the first sub-folding portion 122a among Fig. 7).Certainly, in other embodiments of the invention, folding portion 122 also can be other shape that is suitable for cutting, and does not enumerate one by one at this.When the shape of folding portion 122 is comparatively complicated, can utilize cut to form.
First flexible printed circuit board 120 is connected to receive the various control signal with external circuit, and then other circuit board that control signal is sent in the liquid crystal indicator (comprises embossing seal printed circuit board and flexible printed circuit board, the circuit board that is electrically connected with light source in the module backlight for example), therefore, first flexible printed circuit board 120 is most important circuit boards in the entire liquid crystal display device.Folding portion 122 can be first flexible printed circuit board 120 and being connected of other circuit board provides an interface channel in the liquid crystal indicator, to realize being electrically connected of first flexible printed circuit board 120 and other circuit board, during concrete the application, the free end 1222 of folding portion 122 can be turned down, to be connected to other circuit board, like this, other circuit board can be arranged to comparatively simple shape, as " one " font, when other circuit board is flexible printed circuit board, can improve the composing rate of flexible printed circuit board, reduce the raw materials cost of other circuit board.The circuit board quantity that is electrically connected with first flexible printed circuit board 120 according to need, the quantity of folding portion 122 can be one or more than, be that folding portion 122 comprises the first sub-folding portion 122a, perhaps also comprise the second sub-folding portion 122b, the 3rd sub-folding portion ... etc..The folding portion that definition is electrically connected with circuit board in the module backlight among the present invention is the first sub-folding portion 122a.
Fig. 8 is the structure diagram of module backlight in one embodiment of the present of invention, as shown in Figure 8, module 200 backlight comprises light source 210 and second flexible printed circuit board 220 that is electrically connected with light source 210, light source 210 is arranged on second flexible printed circuit board 220, and light source 210 quantity that are arranged on second flexible printed circuit board 220 can be a plurality of.Module 200 backlight comprises that also glue frame 230, the second flexible printed circuit boards 220 backlight are arranged on the glue frame 230 backlight.In one embodiment, for the composing rate that improves flexible printed circuit board to reduce the raw materials cost of second flexible printed circuit board, second flexible printed circuit board 220 is " one " font, like this, second flexible printed circuit board 220 can once cut and form, and need not be welded to connect; Light source 210 is LED(Light Emitting Diode, light emitting diode).
In conjunction with Fig. 4, shown in Figure 8, when liquid crystal display module 100 and module 200 backlight are fitted together, with the exiting surface of module 200 backlight over against liquid crystal display module 100 and make that both are parallel to be oppositely arranged, in order to provide backlight for liquid crystal display module 100.After liquid crystal display module 100 is stacked together with module 200 backlight, first flexible printed circuit board 120 in the liquid crystal display module 100 is electrically connected with second flexible printed circuit board 220 in the module 200 backlight, in order to provide electric signal for light source 210.
Fig. 9 is the synoptic diagram that first flexible printed circuit board is electrically connected with second flexible printed circuit board, the first sub-folding portion 122a is to be example with the first sub-folding portion 122a among Fig. 6 among Fig. 9, and Fig. 9 sees view in the past from the light source back side, as shown in Figure 9, the first sub-folding portion 122a(shadow region on first flexible printed circuit board 120 is represented) contact with second flexible printed circuit board 220 until the free end 1222 of the first sub-folding portion 122a to 220 turnovers of second flexible printed circuit board, free end 1222 and second flexible printed circuit board 220 with the first sub-folding portion 122a welds together then, to realize being electrically connected of first flexible printed circuit board 120 and second flexible printed circuit board 220.Particularly, in conjunction with Fig. 6, shown in Figure 8, can the first golden finger 131(, first golden finger 131 and light source 210 be set at second flexible printed circuit board 220 and be positioned at the opposite two sides of second flexible printed circuit board 220), second golden finger 132 is set on the free end 1222 of the first sub-folding portion 122a, first golden finger 131, second golden finger 132 is electrically connected realizes being electrically connected of first flexible printed circuit board 120 and second flexible printed circuit board 220.In the above-described embodiments, the free end 1222 on light source 210 and the first sub-folding portion 122a can be arranged at the opposite two sides of second flexible printed circuit board 220 respectively.
Like this, external circuit can send secondary signal to light source 210 in the following manner: secondary signal is sent to the first sub-folding portion 122a earlier, be delivered to second flexible printed circuit board 220 that is electrically connected with the first sub-folding portion 122a then, finally arrive light source 210.Described secondary signal comprises light source drive signal (as the light source drive signal of field sequence type LCD), power supply voltage signal etc.
In another embodiment of the present invention, second flexible printed circuit board 220 in the above-mentioned module backlight can use embossing seal printed circuit board (Printed Circuit Board is called for short PCB) to substitute.
Figure 10 is the structure diagram of liquid crystal indicator in the another embodiment of the present invention, and as shown in figure 10, liquid crystal indicator also comprises touch-screen 300 and the 3rd flexible printed circuit board 310 that is electrically connected with touch-screen 300.Touch-screen 300 is arranged on liquid crystal panel 110 tops, and module 200 backlight is arranged on liquid crystal panel 110 belows, can liquid crystal panel 110 be become an integral body with touch-screen 300 adhesions by pasting band.One end of the 3rd flexible printed circuit board 310 is electrically connected with touch-screen 300, and the other end is electrically connected with first flexible printed circuit board 120, to receive the control signal of external circuit.In conjunction with Fig. 5, Figure 6 and Figure 7, for realizing being electrically connected of the 3rd flexible printed circuit board 310 and first flexible printed circuit board 120, folding portion 122 on first flexible printed circuit board 120 also comprises the second sub-folding portion 122b, and the free end 1222 of the second sub-folding portion 122b is electrically connected with the 3rd flexible printed circuit board 310.Free end 1222 and the 3rd flexible printed circuit board 310 of the second sub-folding portion 122b can be welded together, to realize both electrical connections.Particularly, the 3rd flexible printed circuit board 310 is provided with the 3rd golden finger (not shown), the free end 1222 of the second sub-folding portion 122b is provided with the 4th golden finger 133, the three golden fingers, the 4th golden finger 133 and is electrically connected and can realizes being electrically connected of first flexible printed circuit board 120 and the 3rd flexible printed circuit board 310.Therefore, the 3rd flexible printed circuit board 310 can be arranged to comparatively simple shape, as " one " font, has improved the composing rate of flexible printed circuit board, has reduced the raw materials cost of the 3rd flexible printed circuit board.It should be noted that the second sub-folding portion 122b can be arranged to be suitable for arbitrarily the shape of cutting, and is not limited to accompanying drawing.
Like this, external circuit can send the 3rd signal to 300: the three signals of touch-screen in the following manner and be sent to the second sub-folding portion 122b earlier, be delivered to the 3rd flexible printed circuit board 310 that is electrically connected with the second sub-folding portion 122b then, finally arrive touch-screen 300.Described the 3rd signal comprises that touch drives signal, touch sensible signal, clock signal, supply voltage etc.
In liquid crystal indicator shown in Figure 10, the first sub-folding portion 122a on first flexible printed circuit board 120 is electrically connected with second flexible printed circuit board 220 or embossing seal printed circuit board in the module backlight, so that for light source provides control signal, the second sub-folding portion 122b on first flexible printed circuit board 120 is electrically connected with the 3rd flexible printed circuit board 310, in order to provide control signal for touch-screen.
In the embodiment of above-mentioned all liquid crystal indicators, as Fig. 5, Figure 6 and Figure 7, for stoping the further cracking of segmentation side 121, to avoid folding portion 122 to spin off from first flexible printed circuit board 120, can make segmentation side 121 at stiff end 1221 places of folding portion 122 crack arrest portion 140 is set, segmentation side 121 terminates in crack arrest portion 140.Crack arrest portion 140 can be the hole of circular hole or similar circle; In addition, be electrically connected with other circuit board for the free end 1222 that makes folding portion 122 is easier, the width W of folding portion 122 is more than or equal to 1mm.
In the embodiment of above-mentioned all liquid crystal indicators, position and folding portion free end 1222 length of folding portion 122 can be set flexibly according to the relative position between first flexible printed circuit board 120 and other circuit board in the liquid crystal indicator.As Fig. 5, Figure 6 and Figure 7, folding portion 122 can be arranged on the edge (shown in the first sub-folding portion 122a among Fig. 7) of first flexible printed circuit board 120, also can be arranged on the non-fringe region (shown in the first sub-folding portion 122a and the second sub-folding portion 122b among Fig. 5 and Fig. 6, or shown in the second sub-folding portion 122b among Fig. 7) of first flexible printed circuit board 120.The length L of folding portion free end 1222 2Can be less than the length L of the first flexible printed circuit board free end 120b 1(shown in the first sub-folding portion 122a and the second sub-folding portion 122b among Fig. 5 and Fig. 6, or shown in the second sub-folding portion 122b among Fig. 7) also can equal the length L of the first flexible printed circuit board free end 120b 1(shown in the first sub-folding portion 122a among Fig. 7).The length L of the first flexible printed circuit board free end 120b 1Refer to the distance between the first flexible printed circuit board stiff end 120a and the Data Input Interface P, the length L of folding portion free end 1222 2Refer to folding portion stiff end 1221 and the most close Data Input Interface P and be parallel to the segmentation side part of stiff end 1221 that (segmentation side partly is made up of many segmentation sides, some segmentation sides part is parallel with stiff end 1221, and some segmentation side part and stiff end 1221 are not parallel) between distance.Length L when folding portion free end 1222 2Length L less than the first flexible printed circuit board free end 120b 1The time (shown in the first sub-folding portion 122a and the second sub-folding portion 122b among Fig. 5 and Fig. 6, or shown in the second sub-folding portion 122b among Fig. 7), be parallel between the segmentation side part of stiff end 1221 and the Data Input Interface P and exist at interval, when the length L of folding portion free end 1222 2Equal the length L of the first flexible printed circuit board free end 120b 1The time (shown in the first sub-folding portion 122a among Fig. 7), be parallel between the segmentation side part of stiff end 1221 and the Data Input Interface P and do not exist at interval.
In sum, compared with prior art, the present invention has the following advantages:
Liquid crystal indicator provided by the present invention comprises liquid crystal display module and module backlight, first flexible printed circuit board in the liquid crystal display module is provided with segmentation side, make folding portion by described division margin, the quantity of folding portion is at least one, it is the first sub-folding portion, the free end of the first sub-folding portion is turned down and can be electrically connected with second flexible printed circuit board in the module backlight, realized the binding of liquid crystal display module and module backlight.The first sub-folding portion is equivalent to " | " type part in existing T type or L type second flexible printed circuit board, and second flexible printed circuit board among the present invention is equivalent to " one " font part in existing T type or L type second flexible printed circuit board, because second flexible printed circuit board is once to cut to form and have a higher flexible printed circuit board composing rate, reduced the raw materials cost of second flexible printed circuit board, in addition, second flexible printed circuit board is not welded, the risk that can not have short circuit or interruption has improved the reliability that circuit connects.
In addition, folding portion also can comprise the second sub-folding portion, so that for first flexible printed circuit board with being connected of other circuit board provide an interface channel in the liquid crystal indicator, to realize being electrically connected of first flexible printed circuit board and other circuit board, during concrete the application, the free end of the second sub-folding portion can be turned down, to be connected to other circuit board, like this, other circuit board can be arranged to comparatively simple shape, as " one " font, when other circuit board is flexible printed circuit board, can improve the composing rate of flexible printed circuit board, reduce the raw materials cost of other circuit board.As wherein a kind of application, described other circuit board can be the flexible printed circuit board that is electrically connected with touch-screen.
Above-mentioned explanation by embodiment should be able to make this area professional and technical personnel understand the present invention better, and can reproduce and use the present invention.Those skilled in the art can do various changes to above-described embodiment under the situation that does not break away from the spirit and scope of the invention according to described principle herein and modification is apparent.Therefore, the present invention should not be understood that to be limited to above-described embodiment shown in this article, and its protection domain should be defined by appending claims.

Claims (13)

1. a liquid crystal indicator is characterized in that, comprising:
The liquid crystal display module, described liquid crystal display module comprises liquid crystal panel and first flexible printed circuit board that is electrically connected with described liquid crystal panel, the folding portion that described first flexible printed circuit board is provided with segmentation side and is limited by described segmentation side, described folding portion has free end, stiff end, and described folding portion comprises the first sub-folding portion at least;
Module backlight, described module backlight comprise light source and second flexible printed circuit board that is electrically connected with described light source or embossing seal printed circuit board, and the free end of the described first sub-folding portion is electrically connected with described second flexible printed circuit board or embossing seal printed circuit board.
2. liquid crystal indicator according to claim 1 is characterized in that, the L-shaped or rectangle of described folding portion.
3. liquid crystal indicator according to claim 1 is characterized in that, described second flexible printed circuit board is " one " font.
4. liquid crystal indicator according to claim 3 is characterized in that, described light source is LED.
5. liquid crystal indicator according to claim 4 is characterized in that, the free end of described LED and the described first sub-folding portion is arranged at the opposite two sides of described second flexible printed circuit board respectively.
6. liquid crystal indicator according to claim 1 is characterized in that, the free end of described second flexible printed circuit board or embossing seal printed circuit board and the described first sub-folding portion welds together.
7. liquid crystal indicator according to claim 1, it is characterized in that, described second flexible printed circuit board or embossing seal printed circuit board are provided with first golden finger, and the free end of the described first sub-folding portion is provided with second golden finger, and described first golden finger, second golden finger are electrically connected.
8. liquid crystal indicator according to claim 1, it is characterized in that, described liquid crystal indicator also comprises touch-screen and the 3rd flexible printed circuit board that is electrically connected with described touch-screen, described folding portion also comprises the second sub-folding portion, and the free end of the described second sub-folding portion is electrically connected with described the 3rd flexible printed circuit board.
9. liquid crystal indicator according to claim 8 is characterized in that, the free end of described the 3rd flexible printed circuit board and the described second sub-folding portion welds together.
10. liquid crystal indicator according to claim 8, it is characterized in that, described the 3rd flexible printed circuit board is provided with the 3rd golden finger, and the free end of the described second sub-folding portion is provided with the 4th golden finger, and described the 3rd golden finger, the 4th golden finger are electrically connected.
11., it is characterized in that described segmentation side is provided with crack arrest portion at the stiff end place of described folding portion according to each described liquid crystal indicator of claim 1 to 10.
12. according to each described liquid crystal indicator of claim 1 to 10, it is characterized in that the width of described folding portion is more than or equal to 1mm.
13., it is characterized in that the free end length of the described first sub-folding portion is less than or equal to the free end length of described first flexible printed circuit board according to each described liquid crystal indicator of claim 1 to 10.
CN201210208928.XA 2012-06-21 2012-06-21 Liquid crystal indicator Active CN103293725B (en)

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CN106200056A (en) * 2016-08-28 2016-12-07 上海与德通讯技术有限公司 A kind of screen module and electronic equipment
CN109932848A (en) * 2019-04-03 2019-06-25 深圳市华星光电技术有限公司 Array substrate
CN114828408A (en) * 2022-04-02 2022-07-29 Tcl华星光电技术有限公司 Printed circuit board and backlight module

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CN102057321A (en) * 2008-06-17 2011-05-11 三星电子株式会社 Backlight unit for liquid crystal display device
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