WO2011161857A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2011161857A1 WO2011161857A1 PCT/JP2011/002112 JP2011002112W WO2011161857A1 WO 2011161857 A1 WO2011161857 A1 WO 2011161857A1 JP 2011002112 W JP2011002112 W JP 2011002112W WO 2011161857 A1 WO2011161857 A1 WO 2011161857A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flexible printed
- printed circuit
- circuit board
- electrodes
- protruding
- Prior art date
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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
- H05K7/00—Constructional details common to different types of electric apparatus
-
- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
-
- 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
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- 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
- H05K2201/04—Assemblies of printed circuits
- H05K2201/045—Hierarchy auxiliary PCB, i.e. more than two levels of hierarchy for daughter PCBs are important
-
- 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
- H05K2201/05—Flexible printed circuits [FPCs]
- H05K2201/055—Folded back on itself
-
- 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
- H05K2201/09372—Pads and lands
- H05K2201/09445—Pads for connections not located at the edge of the PCB, e.g. for flexible 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/321—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
- H05K3/323—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
Definitions
- the present invention relates to a display device capable of high-quality display, thinning, and low power consumption, such as a liquid crystal display device and an organic EL display device.
- display devices capable of high quality display, thinning and low power consumption, such as liquid crystal display devices and organic EL display devices, have been developed. These display devices include a display unit that displays an image and a terminal unit that is formed around the display unit. A plurality of protruding electrodes that are electrically connected to control lines that control each pixel portion of the display portion are formed in the terminal portion. With the increase in resolution and size of the display unit, there is a problem that the pitch between the protruding electrodes is narrowed.
- the variation in the amount of self-emission is large due to variations in the coating amount of the organic EL material, the deterioration of the organic EL material, and the like, and there is variation in luminance in the entire display unit.
- voltage and current feedback processing is required, and the driving circuit for driving the pixel portion of the display portion becomes complicated.
- the control line which controls the pixel part of a display part tends to increase.
- the pitch between the protruding electrodes becomes narrow.
- a plurality of external circuits 30 are arranged around the insulating substrate 40.
- a flexible printed board 50 is overlaid on the insulating board 40.
- the flexible printed circuit board 60 is overlaid so as to cover the flexible printed circuit board 50.
- the external circuit 30 is electrically connected to the insulating substrate 40 via the flexible printed boards 50 and 60.
- the insulating substrate 40 is formed with a large number of electrodes 43 aligned at a predetermined pitch. Furthermore, insulating films 41 and insulating films 42 that partially cover the electrodes 43 are alternately formed along the alignment direction of the electrodes 43.
- a large number of electrodes 51 are formed on the flexible printed board 50 at a pitch twice the predetermined pitch.
- a large number of electrodes 61 are formed on the flexible printed circuit board 60 at a pitch twice the predetermined pitch.
- An electrode 51 is connected to an electrode 43 that is exposed outside the insulating film 42.
- An electrode 61 is connected to an electrode 43 that is exposed on the inner side than the insulating film 41.
- the flexible printed boards 50 and 60 are mounted as a set on the plurality of electrodes 43 arranged in a staggered manner. At this time, one end of the flexible printed circuit board 50 is positioned on the insulating substrate 40. The other end of the flexible printed board 50 is positioned on the external circuit 30. One end of the flexible printed circuit board 60 is positioned on the insulating substrate 40. The other end of the flexible printed circuit board 60 is located on the external circuit 30. For this reason, the process of mounting the flexible printed circuit board 50 (for example, see FIG. 15) and the process of mounting the flexible printed circuit board 60 (for example, see FIG. 16) are executed separately. Along with this, there is a problem that the production lead time becomes long.
- ACF anisotropic conductive film
- the flexible printed circuit board 60 when the flexible printed circuit board 60 is mounted, the interval between the electrodes 43 needs to be separated by about 1 to 2 mm in order to prevent physical interference with the spread ACF 53.
- the region of the frame-shaped terminal portion is increased so that the frame width is increased. There is a problem that the ACF 53 hinders narrowing of the frame.
- the present invention can avoid an increase in the production lead time and an increase in the frame width of the terminal portion even if the number of flexible printed circuit boards is increased.
- An object is to provide a display device.
- the display device has the following features.
- a display device having a display unit for displaying an image and a terminal unit formed around the display unit, (b) a first flexible printed circuit board; A second flexible printed circuit board disposed so as to overlap with the first flexible printed circuit board, and (c) a first projecting electrode array comprising a plurality of first projecting electrodes and a plurality of second projecting electrodes. And (d) the second projecting electrode array is disposed at a position closer to the display unit than the first projecting electrode array.
- one end of the first flexible printed circuit board is connected to the first protruding electrode array, and (f) one end of the second flexible printed circuit board is connected to the first flexible printed circuit board.
- Connected to the second protruding electrode array Connected to the second protruding electrode array (G) the first protruding electrode row is adjacent to the second protruding electrode row; (h) one end of the first flexible printed circuit board and the second flexible printed circuit board; One end faces each other.
- the present invention may be realized as a display device manufacturing method described below in addition to being realized as a display device.
- a method for manufacturing a display device having a display portion for displaying an image and a terminal portion formed in the periphery of the display portion, (b) a plurality of second display devices.
- a first protruding electrode array made up of one protruding electrode and a second protruding electrode array made up of a plurality of second protruding electrodes are formed on the connection surface of the terminal portion, and from the first protruding electrode array
- the second protruding electrode array is disposed at a position close to the display unit, the first protruding electrode array is adjacent to the second protruding electrode array, and (c) a first flexible print.
- one end of the first flexible printed circuit board is disposed above the first protruding electrode array.
- One end of the second flexible printed circuit board A first step of disposing the second protruding electrode array above the head, and (d) simultaneously heading one end of the first flexible printed circuit board and one end of the second flexible printed circuit board. To connect one end of the first flexible printed circuit board to the first protruding electrode array, and to connect one end of the second flexible printed circuit board to the second protruding electrode array. And a second step of connecting to.
- one end of the first flexible printed circuit board and one end of the second flexible printed circuit board face each other.
- the first flexible printed board and the second flexible printed board can be connected to the connection surface of the terminal portion in one connection step. Accordingly, it is possible to avoid an increase in production lead time even when the number of flexible printed circuit boards is increased.
- first protruding electrode array are adjacent to the plurality of second protruding electrodes (second protruding electrode array).
- FIG. 1 is a diagram illustrating an overall configuration of a display device according to an embodiment.
- FIG. 2 is a diagram illustrating a lower right portion of the display device according to the embodiment.
- FIG. 3 is a view showing a cross section of the lower right portion of the display device according to the embodiment taken along line A-A ′ and viewed in the direction of the arrow.
- FIG. 4 is a diagram showing a cross section of the lower right portion of the display device according to the embodiment taken along line B-B ′ and viewed in the direction of the arrow.
- FIG. 5 is a diagram illustrating a terminal portion of the display device in the embodiment.
- FIG. 6 is a diagram illustrating an arrangement process of the manufacturing method of the display device in the embodiment.
- FIG. 1 is a diagram illustrating an overall configuration of a display device according to an embodiment.
- FIG. 2 is a diagram illustrating a lower right portion of the display device according to the embodiment.
- FIG. 3 is a view showing a cross section of the lower
- FIG. 7 is a diagram illustrating a first connection process of the method for manufacturing the display device according to the embodiment.
- FIG. 8 is a diagram illustrating a second connection step of the method for manufacturing the display device according to the embodiment.
- FIG. 9 is a diagram illustrating a bending process of the manufacturing method of the display device in the embodiment.
- FIG. 10 is a diagram illustrating a third connection step in the method for manufacturing the display device according to the embodiment.
- FIG. 11 is a diagram illustrating the vicinity of the input side connection portion of the flexible printed circuit board according to the embodiment.
- FIG. 12 is a diagram illustrating a cross section of the flexible printed circuit board according to the embodiment, the vicinity of the input side connection portion being cut along the line C-C ′ and viewed in the direction of the arrows.
- FIG. 13 is a diagram illustrating a cross section of a vertical portion of a terminal portion in a modification of the embodiment.
- FIG. 14A is a first diagram illustrating a conventional flexible printed circuit board connection method.
- FIG. 14B is a second diagram illustrating a conventional flexible printed circuit board connection method.
- FIG. 14C is a third diagram illustrating a conventional flexible printed circuit board connection method.
- FIG. 15 is a diagram illustrating a first connection process of a conventional flexible printed circuit board.
- FIG. 16 is a diagram illustrating a second connection process of the conventional flexible printed circuit board.
- external circuits 120 and 130 are arranged around panel 110.
- the panel 110 includes a display unit 111 that displays an image and a terminal unit 112 that is formed around the display unit 111.
- Each of the external circuits 120 and 130 is a glass epoxy multilayer substrate, and supplies the panel 110 with power, signals, and the like for causing the panel 110 to display an image.
- two external circuits 120 are arranged on the upper and lower sides of the panel 110 in the vertical direction so as to be adjacent to the horizontal portion of the terminal portion 112.
- One external circuit 130 is disposed on each of the left and right sides of the panel 110 in the horizontal direction so as to be adjacent to the vertical portion of the terminal portion 112.
- the longitudinal direction of the external circuit 120 is aligned with the horizontal direction.
- the longitudinal direction of the external circuit 130 is aligned with the vertical direction.
- the longitudinal dimension of the external circuit 120 is substantially the same as half the horizontal dimension of the horizontal portion of the terminal portion 112.
- the longitudinal dimension of the external circuit 130 is substantially the same as the vertical dimension of the vertical portion of the terminal portion 112.
- a plurality of flexible printed circuit boards 140 are mounted on the horizontal portion of the terminal portion 112 in a state of being aligned in a row in the horizontal direction.
- a plurality of flexible printed circuit boards 150 are mounted on the vertical portion of the terminal portion 112 in a state of being arranged in a line in the vertical direction.
- a plurality of flexible printed circuit boards 160 are mounted in a state of being aligned in a vertical direction so as to overlap the flexible printed circuit board 150.
- the external circuit 120 is electrically connected to the horizontal portion of the terminal portion 112 through the flexible printed board 140.
- the external circuit 130 is electrically connected to the vertical portion of the terminal portion 112 via the flexible printed boards 150 and 160.
- a plurality of protruding electrodes 113 are formed on the horizontal portion (connection surface) of the terminal portion 112 in a state of being aligned in a row in the horizontal direction.
- a plurality of protruding electrodes 115 are formed on the vertical portion (connection surface) of the terminal portion 112 in a state of being aligned in a line in the vertical direction.
- a plurality of protruding electrodes 116 are formed on the vertical portion (connection surface) of the terminal portion 112 so as to be aligned in a line in the vertical direction.
- the row of protruding electrodes 115 is adjacent to the row of protruding electrodes 116.
- a row of protruding electrodes 116 is disposed at a position closer to the display unit 111 than the row of protruding electrodes 115. As shown in FIG. 5, the protruding electrodes 115 and 116 are arranged in a staggered manner in order to increase the pitch of the protruding electrodes in the vertical portion of the terminal portion 112. The distance between the row of protruding electrodes 115 and the row of protruding electrodes 116 is 0.5 mm or less.
- a plurality of metal electrodes 121 are formed on the external circuit 120 (connection surface) in a state of being aligned in a row in the horizontal direction.
- a plurality of metal electrodes 131 are formed on the external circuit 130 (connection surface) in a state of being arranged in a line in the vertical direction.
- a plurality of metal electrodes 132 are formed beside the plurality of metal electrodes 131 and arranged in a line in the vertical direction.
- a row of metal electrodes 132 is arranged at a position farther from the terminal portion 112 than the row of metal electrodes 131.
- the wiring 145 is formed only on one side of the flexible printed circuit board 140.
- a plurality of output side electrodes 141 and a plurality of input side electrodes 142 are formed on the surface on which the wiring 145 is formed.
- a semiconductor element 143 is mounted on the surface opposite to the surface on which the wiring 145 is formed.
- the wiring 145 is connected to the bump 146 by metal bonding of gold and tin or metal bonding of gold and gold.
- the output side electrode 141 is electrically connected to the output side terminal of the semiconductor element 143 through the wiring 145 and the bump 146.
- the input side electrode 142 is electrically connected to the input side terminal of the semiconductor element 143 through the wiring 145 and the bump 146.
- the flexible printed circuit boards 150 and 160 have the same structure as that of the flexible printed circuit board 140, and thus the description thereof is omitted.
- the surface portions of the protruding electrodes 113, 115, and 116 are made of a metal such as Al, Au, or Cu.
- the metal electrodes 121, 131, and 132 are gold-plated on the surface portions to prevent oxidation.
- the surface portion is made of a metal such as Au, Sn, Ag, Al, or Cu.
- the input side electrodes 142, 152, 162 the surface portion is made of metal such as Au, Sn, Ag, Al, or Cu.
- a plurality of output-side electrodes 141 are arranged at one end portion (output-side connection portion) of the flexible printed circuit board 140.
- a plurality of input side electrodes 142 are arranged on the other end (input side connection portion) of the flexible printed circuit board 140.
- the output side electrode 141 is connected to the protruding electrode 113 in a state where the protruding electrode 113 is covered with the ACF 114.
- the input electrode 142 is connected to the metal electrode 121 in a state where the metal electrode 121 is covered with the ACF 123.
- a plurality of output-side electrodes 151 are arranged at one end portion (output-side connection portion) of the flexible printed board 150.
- a plurality of input side electrodes 152 are arranged on the other end (input side connection portion) of the flexible printed circuit board 150.
- the output side electrode 151 is connected to the protruding electrode 115 in a state where an alloy layer is formed at the contact portion between the protruding electrode 115 and the output side electrode 151.
- the input electrode 152 is connected to the metal electrode 131 in a state where the metal electrode 131 is covered with the ACF 133.
- a plurality of output-side electrodes 161 are arranged at one end portion (output-side connection portion) of the flexible printed circuit board 160.
- a plurality of input side electrodes 162 are arranged on the other end (input side connection portion) of the flexible printed circuit board 160.
- the output side electrode 161 is connected to the protruding electrode 116 in a state where an alloy layer is formed at the contact portion between the protruding electrode 116 and the output side electrode 161.
- the input electrode 162 is connected to the metal electrode 132 in a state where the metal electrode 132 is covered with the ACF 134.
- one end portion (output side connection portion) of the flexible printed circuit board 150 and one end portion (output side connection portion) of the flexible printed circuit board 160 face each other.
- the flexible printed circuit board 160 is bent an even number of times.
- the flexible printed circuit board 160 is bent toward the external circuit 130 above the terminal portion 112 so that at least the display portion 111 is not shielded from light.
- a control line drawn from each pixel portion of the display unit 111 to the horizontal portion of the terminal unit 112 is electrically connected to any one of the plurality of protruding electrodes 113.
- a control line drawn from each pixel portion of the display portion 111 to a vertical portion of the terminal portion 112 is electrically connected to any of the plurality of protruding electrodes 114 and the plurality of protruding electrodes 115.
- Each pixel portion of the display unit 111 is driven by power and signals supplied from the external circuits 120 and 130.
- the flexible printed circuit board 150 is arranged so that the output side electrode 151 is positioned on the terminal portion 112 and the input side electrode 152 is positioned on the external circuit 130.
- the flexible printed circuit board 160 is arranged so that the output side electrode 161 is positioned on the terminal portion 112 and the input side electrode 162 is positioned on the display portion 111.
- the position of the input side connection portion of the flexible printed board 150 is adjusted so that the input side electrode 152 is positioned on the metal electrode 131.
- the position of the output side connection portion of the flexible printed circuit board 150 is adjusted so that the output side electrode 151 is positioned on the protruding electrode 115.
- the position of the input side connection portion of the flexible printed circuit board 160 is adjusted so that the input side electrode 162 is positioned on the metal electrode 132.
- the position of the output side connection portion of the flexible printed circuit board 160 is adjusted so that the output side electrode 161 is positioned on the protruding electrode 116.
- the ACF 133 is disposed in the external circuit 130 in advance so as to cover the metal electrode 131.
- the ACF 133 is pressure-bonded to the external circuit 130 by a head 170 heated to 100 ° C. or lower while preventing the epoxy resin in the ACF 133 from reacting.
- the ACF 134 is disposed in the external circuit 130 so as to cover the metal electrode 132 in advance.
- the ACF 134 is pressure-bonded to the external circuit 130 by a head 170 heated to 100 ° C. or lower while preventing the epoxy resin in the ACF 134 from reacting.
- the output side electrode 151 of the flexible printed board 150 is directly connected to the protruding electrode 115 of the terminal portion 112.
- the output side electrode 161 of the flexible printed circuit board 160 is directly connected to the protruding electrode 116 of the terminal portion 112.
- a head that can cover the output-side electrodes 151 and 161 is used as the head 170.
- the head 170 is disposed so as to straddle the row of protruding electrodes 115 and the row of protruding electrodes 116.
- the output side connection part of the flexible printed circuit board 150 and the output side connection part of the flexible printed circuit board 160 are simultaneously pressed from above by the head 170 heated at 80 to 200 ° C.
- an ultrasonic wave having a frequency of 40 to 130 kHz is applied to the head 170 with an output of 2 to 40 W.
- the oxide films on the respective surfaces of the output-side electrodes 151 and 162 and the protruding electrodes 115 and 116 are destroyed by the temperature, the ultrasonic wave, and the load.
- the new surface of the output side electrode 151 and the protruding electrode 115 is rubbed, and an alloy layer is formed at the contact portion between the output side electrode 151 and the protruding electrode 115.
- the new surfaces of the output-side electrode 161 and the protruding electrode 116 are rubbed, and an alloy layer is formed at the contact portion between the output-side electrode 161 and the protruding electrode 116.
- the output side electrode 151 is bonded to the protruding electrode 115, and the output side electrode 161 is bonded to the protruding electrode 116.
- the input-side electrode 152 of the flexible printed board 150 is directly connected to the metal electrode 131 of the external circuit 130.
- the input-side connection portion of the flexible printed circuit board 150 is pressed from above by the head 170 heated to 160 to 250 ° C. for 0.5 to 2 MPa and 5 to 10 seconds.
- the epoxy resin in the ACF 133 is heated and cured in a state where the conductive particles in the ACF 133 are crushed between the metal electrodes.
- the state in which the conductive particles are crushed can be maintained, and conduction between the input-side electrode 152 and the metal electrode 131 can be obtained.
- the flexible printed circuit board 160 is bent. At this time, the vicinity of the output side connection portion of the flexible printed circuit board 163 is bent so that the semiconductor element 163 mounted on the flexible printed circuit board 160 is positioned above the semiconductor element 153 mounted on the flexible printed circuit board 150. Further, the vicinity of the input side connection portion of the flexible printed circuit board 160 is bent so that the input side electrode 162 of the flexible printed circuit board 160 and the metal electrode 132 of the external circuit 130 face each other. The flexible printed circuit board 160 is brought close to the flexible printed circuit board 150 to the extent that the flexible printed circuit board 160 does not touch the flexible printed circuit board 150.
- the input-side electrode 162 of the flexible printed board 160 is directly connected to the metal electrode 132 of the external circuit 130.
- the input-side connection portion of the flexible printed circuit board 160 is pressed from above by the head 170 heated to 160 to 250 ° C. for 0.5 to 2 MPa and 5 to 10 seconds.
- the epoxy resin in the ACF 134 is heated and cured in a state where the conductive particles in the ACF 134 are crushed between the metal electrodes.
- the state in which the conductive particles are crushed can be maintained, and conduction between the input-side electrode 162 and the metal electrode 132 can be obtained.
- the flexible printed circuit board 160 is pressed twice by the head 170 when the input side electrode 162 is connected to the metal electrode 132. At this time, the load from the head 170 tends to escape into the flexible printed circuit board 160. For this reason, a load cannot be stably applied to the contact portion between the input-side electrode 162 and the metal electrode 132, and connection failure is likely to occur.
- the plurality of wirings 165 on the flexible printed circuit board 160 extend straight in parallel along the longitudinal direction of the flexible printed circuit board 160. As shown in FIG. 12, the flexible printed circuit board 160 is bent so that the wiring 165 of the flexible printed circuit board 160 overlaps above the row of metal electrodes 132. Thereby, in the third connection step, the input side electrode 162 exists immediately below the wiring 165 of the flexible printed circuit board 160, so that the load from the head 170 can be uniformly and stably applied to the input side connection portion. it can.
- the output side electrode 141 is connected to the protruding electrode 113 in the following procedure. First, the protruding electrode 113 is covered with the ACF 114. Next, the output-side electrode 141 is installed on the protruding electrode 113 covered with the ACF 114. Next, in a state where the output side electrode 141 is installed on the protruding electrode 113, the output side connection portion is heated and pressurized. As a result, the output-side electrode 141 is connected to the protruding electrode 113. The input side electrode 142 is connected to the metal electrode 121 in the same procedure.
- one end portion (output-side connection portion) of flexible printed circuit board 150 and one end portion (output-side connection portion) of flexible printed circuit board 160 face each other.
- the flexible printed circuit board 150 and the flexible printed circuit board 160 can be connected to the vertical portion (connection surface) of the terminal portion 112 in a single connection process. Accordingly, it is possible to avoid an increase in production lead time even when the number of flexible printed circuit boards is increased.
- the plurality of protruding electrodes 115 and the plurality of protruding electrodes 116 are arranged in a staggered manner, and the row of the protruding electrodes 115 is adjacent to the row of the protruding electrodes 116. As a result, even if the number of flexible printed circuit boards is increased, it is possible to avoid an increase in the frame width of the terminal portion 112.
- the output side connection portions of the flexible printed boards 150 and 160 are collectively connected to the terminal portion 112 by the head 170 straddling the protruding electrodes 115 and 116. At this time, heat, pressure, and ultrasonic waves are applied to the contact portion between the output-side electrode 151 and the protruding electrode 115 to form an alloy layer. At the same time, heat, pressure, and ultrasonic waves are applied to the contact portion between the output-side electrode 161 and the protruding electrode 116 to form an alloy layer.
- the output side electrode 151 can be directly connected to the protruding electrode 115 and the output side electrode 161 can be directly connected to the protruding electrode 116 without using the ACF. For this reason, it is not necessary to consider the flow of the ACF in determining the interval between the protruding electrodes 115 and 116. Accordingly, the distance between the protruding electrodes 115 and 116 can be reduced to half or less of 1 mm, for example, about 0 to 0.5 mm. From this, it is possible to avoid an increase in the frame width of the terminal portion 112.
- the flexible printed circuit board 160 has a structure different from that of the flexible printed circuit board 140, and wiring is formed on both surfaces.
- the wiring on one surface is electrically connected to the wiring on the other surface through vias. It may be.
- FIG. 13 it is assumed that a plurality of input-side electrodes 162 are formed on the surface opposite to the surface on which the output-side electrode 161 is formed, and the semiconductor element 163 is mounted.
- the flexible printed circuit board 160 is bent an odd number of times on the way from one end portion (output side connection portion) of the flexible printed circuit board 160 to the other end portion (input side connection portion).
- the semiconductor element 163 mounted on the flexible printed circuit board 160 is positioned above the semiconductor element 153 mounted on the flexible printed circuit board 150, and the input side electrode 162 of the flexible printed circuit board 160 and the external circuit The vicinity of the input side connection portion of the flexible printed circuit board 160 is bent so that the 130 metal electrodes 132 face each other.
- the present invention can be used, for example, as a display device capable of high quality display, thinning, and low power consumption, such as a liquid crystal display device and an organic EL display device.
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- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Nonlinear Science (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
以下、本発明に係わる実施の形態について、図面を参照しながら説明する。
図1に示すように、本実施の形態における表示装置100では、パネル110の周辺に、外部回路120,130が配置されている。パネル110は、画像を表示する表示部111と、表示部111の周辺に形成された端子部112とを有する。外部回路120,130の各々は、ガラスエポキシの多層基板であり、パネル110に画像を表示させるための電力、信号などをパネル110に供給する。
次に、表示装置100の製造方法について説明する。ここでは、フレキシブルプリント基板150,160を端子部112の垂直部分と外部回路130とに実装する場合について説明する。
まず、当該製造方法では、図6に示すように、出力側電極151が端子部112上に位置して入力側電極152が外部回路130上に位置するように、フレキシブルプリント基板150を配置する。出力側電極161が端子部112上に位置して入力側電極162が表示部111上に位置するように、フレキシブルプリント基板160を配置する。入力側電極152が金属電極131上に位置するように、フレキシブルプリント基板150の入力側接続部分の位置を調整する。出力側電極151が突起電極115上に位置するように、フレキシブルプリント基板150の出力側接続部分の位置を調整する。入力側電極162が金属電極132上に位置するように、フレキシブルプリント基板160の入力側接続部分の位置を調整する。出力側電極161が突起電極116上に位置するように、フレキシブルプリント基板160の出力側接続部分の位置を調整する。
次に、当該製造方法では、図7に示すように、フレキシブルプリント基板150の出力側電極151を端子部112の突起電極115に直接接続する。同時に、フレキシブルプリント基板160の出力側電極161を端子部112の突起電極116に直接接続する。このとき、ヘッド170として、出力側電極151,161を覆うことが可能なものを使用する。突起電極115の列と突起電極116の列とに跨るようにヘッド170を配置する。フレキシブルプリント基板150の出力側接続部分とフレキシブルプリント基板160の出力側接続部分とを、80~200℃で加熱したヘッド170で同時に上方から押圧する。出力側電極151が突起電極115と接触して出力側電極161が突起電極116と接触した状態で、40~130kHzの周波数の超音波を2~40Wの出力でヘッド170に印加する。
次に、当該製造方法では、図8に示すように、フレキシブルプリント基板150の入力側電極152を外部回路130の金属電極131に直接接続する。このとき、160~250℃に加熱したヘッド170で、0.5~2MPa、5~10秒、フレキシブルプリント基板150の入力側接続部分を上方から押圧する。
次に、当該製造方法では、図9に示すように、フレキシブルプリント基板160を折り曲げる。このとき、フレキシブルプリント基板150に実装された半導体素子153の上方にフレキシブルプリント基板160に実装された半導体素子163が位置するように、フレキシブルプリント基板163の出力側接続部分付近が折り曲げられる。さらに、もう一回、フレキシブルプリント基板160の入力側電極162と外部回路130の金属電極132とが向き合うように、フレキシブルプリント基板160の入力側接続部分付近が折り曲げられる。フレキシブルプリント基板150にフレキシブルプリント基板160が触れない程度まで、フレキシブルプリント基板160をフレキシブルプリント基板150に近づける。
次に、当該製造方法では、図10に示すように、フレキシブルプリント基板160の入力側電極162を外部回路130の金属電極132に直接接続する。このとき、160~250℃に加熱したヘッド170で、0.5~2MPa、5~10秒、フレキシブルプリント基板160の入力側接続部分を上方から押圧する。
以上、本実施の形態によれば、フレキシブルプリント基板150の一方の端部(出力側接続部分)とフレキシブルプリント基板160の一方の端部(出力側接続部分)とが向き合っている。これによって、フレキシブルプリント基板150とフレキシブルプリント基板160とを1回の接続工程で、端子部112の垂直部分(接続面)に接続することができる。これに伴い、フレキシブルプリント基板の実装数が増大しても、生産リードタイムが長くなることを回避することができる。
なお、フレキシブルプリント基板160については、フレキシブルプリント基板140と構造が異なり、両面に配線が形成されており、ビアを介して、一方の面の配線が他方の面の配線と電気的に接続されているとしてもよい。例えば、図13に示すように、出力側電極161が形成されている面の反対面に、複数の入力側電極162が形成されており、半導体素子163が実装されているとする。この場合において、フレキシブルプリント基板160の一方の端部(出力側接続部分)から他方の端部(入力側接続部分)に向かう途中で、奇数回、フレキシブルプリント基板160が折り曲げられている。具体的には、折り曲げ工程において、フレキシブルプリント基板150に実装された半導体素子153の上方にフレキシブルプリント基板160に実装された半導体素子163が位置してフレキシブルプリント基板160の入力側電極162と外部回路130の金属電極132とが向き合うように、フレキシブルプリント基板160の入力側接続部分付近が折り曲げられる。
Claims (7)
- 画像を表示する表示部と前記表示部の周辺に形成された端子部とを有する表示装置であって、
第1のフレキシブルプリント基板と、前記第1のフレキシブルプリント基板に重なるように配置されている第2のフレキシブルプリント基板とを備え、
複数の第1の突起電極からなる第1の突起電極列と複数の第2の突起電極からなる第2の突起電極列とが前記端子部の接続面に形成されており、
前記第1の突起電極列よりも前記表示部に近い位置に前記第2の突起電極列が配置されており、
前記第1のフレキシブルプリント基板の一方の端部が前記第1の突起電極列に接続されており、
前記第2のフレキシブルプリント基板の一方の端部が前記第2の突起電極列に接続されており、
前記第1の突起電極列が前記第2の突起電極列に隣接しており、
前記第1のフレキシブルプリント基板の一方の端部と前記第2のフレキシブルプリント基板の一方の端部とが向き合っている
ことを特徴とする表示装置。 - 前記表示部を駆動制御する外部回路を備え、
複数の第1の金属電極からなる第1の金属電極列と複数の第2の金属電極からなる第2の金属電極列とが前記外部回路の接続面に形成されており、
前記第1の金属電極列よりも前記端子部から遠い位置に前記第2の金属電極列が配置されており、
前記第1のフレキシブルプリント基板の他方の端部が前記第1の金属電極列に接続されており、
前記第2のフレキシブルプリント基板の他方の端部が前記第2の金属電極列に接続されており、
前記表示部を遮光しないように、前記第2のフレキシブルプリント基板が前記端子部の上方で前記外部回路の方へ折り曲げられている
ことを特徴とする請求項1に記載の表示装置。 - 前記第2のフレキシブルプリント基板の一方の端部に、前記複数の第2の突起電極に接続されている複数の第1の電極が形成されており、
前記第2のフレキシブルプリント基板の他方の端部に、前記複数の第2の金属電極に接続されている複数の第2の電極が形成されており、
前記第2のフレキシブルプリント基板の片面に、前記複数の第1の電極と前記複数の第2の電極とが配置されており、
前記第2のフレキシブルプリント基板の一方の端部から他方の端部に向かう途中で、偶数回、前記第2のフレキシブルプリント基板が折り曲げられている
ことを特徴とする請求項2に記載の表示装置。 - 前記第2の金属電極列の上方で前記第2のフレキシブルプリント基板の配線が重なるように、前記第2のフレキシブルプリント基板が折り曲げられている
ことを特徴とする請求項3に記載する表示装置。 - 前記第2のフレキシブルプリント基板の一方の端部に、前記複数の第2の突起電極に接続されている複数の第1の電極が形成されており、
前記第2のフレキシブルプリント基板の他方の端部に、前記複数の第2の金属電極に接続されている複数の第2の電極が形成されており、
前記第2のフレキシブルプリント基板の両面の一方の面に前記複数の第1の電極が配置されており、前記両面の他方の面に前記複数の第2の電極が配置されており、
前記第2のフレキシブルプリント基板の一方の端部から他方の端部に向かう途中で、奇数回、前記第2のフレキシブルプリント基板が折り曲げられている
ことを特徴とする請求項2に記載の表示装置。 - 画像を表示する表示部と前記表示部の周辺に形成された端子部とを有する表示装置の製造方法であって、
複数の第1の突起電極からなる第1の突起電極列と複数の第2の突起電極からなる第2の突起電極列とが前記端子部の接続面に形成されており、前記第1の突起電極列よりも前記表示部に近い位置に前記第2の突起電極列が配置されており、前記第1の突起電極列が前記第2の突起電極列に隣接しており、
第1のフレキシブルプリント基板の一方の端部と第2のフレキシブルプリント基板の一方の端部とが向き合った状態で、前記第1のフレキシブルプリント基板の一方の端部を前記第1の突起電極列の上方に配置して、前記第2のフレキシブルプリント基板の一方の端部を前記第2の突起電極列の上方に配置する第1の工程と、
前記第1のフレキシブルプリント基板の一方の端部と前記第2のフレキシブルプリント基板の一方の端部とを同時にヘッドで押圧して、前記第1のフレキシブルプリント基板の一方の端部を前記第1の突起電極列に接続するとともに、前記第2のフレキシブルプリント基板の一方の端部を前記第2の突起電極列に接続する第2の工程とを含む
ことを特徴とする表示装置の製造方法。 - 前記第2のフレキシブルプリント基板の一方の端部が前記第2の突起電極列に接続された状態で、前記表示部を遮光しないように、前記第2のフレキシブルプリント基板を前記端子部の上方で折り曲げる第3の工程を含む
ことを特徴とする請求項6に記載の表示装置の製造方法。
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CN201180018397.1A CN102834855B (zh) | 2010-06-22 | 2011-04-11 | 显示装置 |
US13/702,216 US9042108B2 (en) | 2010-06-22 | 2011-04-11 | Display device |
JP2012521265A JP5719993B2 (ja) | 2010-06-22 | 2011-04-11 | 表示装置 |
EP11797747.0A EP2587471B1 (en) | 2010-06-22 | 2011-04-11 | Display device |
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Cited By (3)
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EP2840656A4 (en) * | 2012-04-13 | 2016-02-24 | Shanghai Tianma Micro Elect Co | CONNECTING DEVICE, FLAT PANEL DEVICE, IMAGE SENSOR, DISPLAY DEVICE, AND TOUCH DEVICE |
EP2993660A4 (en) * | 2013-04-28 | 2016-11-30 | Boe Technology Group Co Ltd | FLEXIBLE SUBSTRATE, DISPLAY DEVICE, AND METHOD FOR BONDING ELECTRONIC DEVICE TO FLEXIBLE SUBSTRATE |
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KR102046864B1 (ko) * | 2013-03-13 | 2019-11-20 | 삼성전자주식회사 | 유연성 디스플레이 장치 |
KR20190083014A (ko) * | 2018-01-02 | 2019-07-11 | 삼성디스플레이 주식회사 | 표시 장치 |
US10818634B2 (en) * | 2018-10-08 | 2020-10-27 | HKC Corporation Limited | Display panel, method for manufacturing the display panel, and display device |
KR20200128252A (ko) | 2019-05-02 | 2020-11-12 | 삼성디스플레이 주식회사 | 표시장치 |
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EP2587471B1 (en) | 2018-01-10 |
CN102834855A (zh) | 2012-12-19 |
EP2587471A1 (en) | 2013-05-01 |
US20130141881A1 (en) | 2013-06-06 |
US9042108B2 (en) | 2015-05-26 |
JPWO2011161857A1 (ja) | 2013-08-19 |
EP2587471A4 (en) | 2015-05-20 |
CN102834855B (zh) | 2015-02-25 |
JP5719993B2 (ja) | 2015-05-20 |
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