WO2015083366A1 - 発光ユニット、発光装置及び発光ユニットの製造方法 - Google Patents
発光ユニット、発光装置及び発光ユニットの製造方法 Download PDFInfo
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- WO2015083366A1 WO2015083366A1 PCT/JP2014/006000 JP2014006000W WO2015083366A1 WO 2015083366 A1 WO2015083366 A1 WO 2015083366A1 JP 2014006000 W JP2014006000 W JP 2014006000W WO 2015083366 A1 WO2015083366 A1 WO 2015083366A1
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- light emitting
- conductor pattern
- insulating film
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/14—Structure, shape, material or disposition of the bump connectors prior to the connecting process of a plurality of bump connectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Definitions
- Embodiments of the present invention relate to a light emitting unit, a light emitting device, and a method for manufacturing the light emitting unit.
- LEDs Light Emitting Diodes
- the LED is small in size, generates a small amount of heat, and has a good response.
- LEDs are widely used in optical devices such as indoor, outdoor, stationary, and moving display devices, display lamps, various switches, signal devices, and general illumination.
- the LED chip is disposed between a pair of transparent films on which transparent electrodes are formed.
- the present invention has been made under the circumstances described above, and it deals with achieving the transparency or flexibility of the module and supplying power efficiently.
- the light emitting unit is arranged to face the first insulating film, for example, a light-transmitting first insulating film having transparency to visible light.
- a second insulating film and a conductive pattern having transparency to visible light for example, and a plurality of conductive patterns formed on at least one surface of the first insulating film and the second insulating film;
- a plurality of first light emitting elements connected to any two of the plurality of conductor patterns, the first light emitting elements are disposed between the first insulating film and the second insulating film, and hold the first light emitting elements.
- a resin layer for example, a light-transmitting first insulating film having transparency to visible light.
- FIG. 1 is a perspective view of a light emitting unit 10 according to the present embodiment.
- FIG. 2 is an exploded perspective view of the light emitting unit 10.
- the light emitting unit 10 includes a light emitting panel 20, a flexible cable 40, a connector 50, and a reinforcing plate 60.
- FIG. 3 is a side view of the light emitting panel 20.
- the light emitting panel 20 includes a pair of transparent films 21 and 22, a resin layer 24 formed between the transparent films 21 and 22, and eight light emitting elements disposed inside the resin layer 24. Elements 30 1 to 30 8 are included.
- the transparent films 21 and 22 are rectangular films whose longitudinal direction is the X-axis direction.
- the transparent film 21 has a thickness of about 50 to 300 ⁇ m and is transparent to visible light.
- the total light transmittance of the transparent film 21 is preferably about 5 to 95%.
- the total light transmittance refers to the total light transmittance measured in accordance with Japanese Industrial Standard JISK7375: 2008.
- the transparent films 21 and 22 have flexibility, and the bending elastic modulus is about 0 to 320 kgf / mm 2 .
- a bending elastic modulus is the value measured by the method based on ISO178 (JIS K7171: 2008).
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PC polycarbonate
- PES polyethylene succinate
- ARTON arton
- a conductive layer 23 having a thickness of about 0.05 ⁇ m to 2 ⁇ m is formed on the lower surface of the transparent film 21 (the surface on the ⁇ Z side in FIG. 3).
- FIG. 4 is a plan view of the light emitting unit 10.
- the conductor layer 23 includes an L-shaped conductor pattern 23 a formed along the + Y side outer edge of the transparent film 21, and the ⁇ Y side outer edge of the transparent film 21.
- the rectangular conductor patterns 23b to 23i are arranged.
- the conductor patterns 23a to 23i are conductor patterns made of a metal material such as copper (Cu) or silver (Ag).
- the distance D between the conductor patterns 23a to 23i is about 100 ⁇ m or less.
- the transparent film 21 is entirely covered with conductor patterns 23a to 23i separated by slits. Thereby, low resistance can be realized. Further, the L-shaped portion of the conductor pattern 23a forms a folded portion.
- the transparent film 22 is shorter in the X-axis direction than the transparent film 21. Therefore, as can be seen with reference to FIG. 3, the + X side ends of the conductor pattern 23 a and the conductor pattern 23 i constituting the conductor layer 23 are exposed.
- the resin layer 24 is formed between the transparent films 21 and 22.
- the resin layer 24 has transparency to visible light.
- the tensile storage elastic modulus of the resin layer 24 at the Vicat softening temperature is 0.1 MPa or more.
- the melting temperature of the resin layer 24 is preferably 180 ° C. or higher, or 40 ° C. or higher than the Vicat softening temperature.
- the glass transition temperature of the resin layer 24 is preferably ⁇ 20 ° C. or lower.
- the elastomer used for the resin layer 24 include acrylic elastomers, olefin elastomers, styrene elastomers, ester elastomers, and urethane elastomers.
- the resin layer 24 has a Vicat softening temperature in the range of 80 ° C. to 160 ° C., and a tensile storage modulus between 0 ° C. and 100 ° C. in the range of 0.01 GPa to 10 GPa.
- Emitting element 30 1 is the square LED chip. As shown in FIG. 5, the light emitting element 30 1, the base substrate 31, N-type semiconductor layer 32, an LED chip having a four-layer structure composed of the active layer 33, P-type semiconductor layer 34. Rated voltage of the light emitting element 30 1 is about 2.5V.
- the base substrate 31 is a sapphire substrate or a semiconductor substrate.
- An N-type semiconductor layer 32 having the same shape as the base substrate 31 is formed on the upper surface of the base substrate 31.
- An active layer 33 and a P-type semiconductor layer 34 are sequentially stacked on the upper surface of the N-type semiconductor layer 32.
- the active layer 33 and the P-type semiconductor layer 34 stacked on the N-type semiconductor layer 32 have notches formed at the ⁇ Y side and ⁇ X side corners, and the surface of the N-type semiconductor layer is exposed.
- a compound semiconductor is used as the N-type semiconductor layer 32, the active layer 33, and the P-type semiconductor layer 34.
- a pad 36 that is electrically connected to the N-type semiconductor layer 32 is formed in a portion of the N-type semiconductor layer 32 exposed from the active layer 33 and the P-type semiconductor layer 34. Further, pads 35 that are electrically connected to the P-type semiconductor layer 34 are formed at the corners on the + X side and the + Y side of the P-type semiconductor layer 34.
- the pads 35 and 36 are made of copper (Cu) or gold (Au), and conductive bumps 37 and 38 are formed on the upper surface.
- the bumps 37 and 38 are made of metal bumps such as gold (Au) and a gold alloy, and are shaped into a hemisphere.
- the metal bump an alloy of these metals such as gold (Au), silver (Ag), copper (Cu), nickel (Ni), AuSn, or the like can be used. Solder bumps may be used instead of metal bumps.
- the bump 37 functions as a cathode electrode
- the bump 38 functions as an anode electrode.
- Emitting element 30 1 configured as described above, as shown in FIG. 6, the conductor patterns 23a, disposed between the 23b, the bump 37 is connected to the conductor pattern 23a, connection bumps 38 to the conductor pattern 23b Is done.
- Figure 7 is a diagram showing a state of the light emitting element 30 1 is connected the conductor pattern 23a, to 23b.
- the conductor patterns 23a to 23i are made of thin film conductors having a line width d1 of about 10 ⁇ m, and the pitch d2 of the thin film conductors is about 300 ⁇ m.
- the line distance d3 is 290 ⁇ m.
- the transmittance Pe of the conductor patterns 23a to 23i is expressed by the following equation. In the present embodiment, the transmittance Pe of the conductor patterns 23a to 23i is about 93.44%.
- the light emitting element 30 1 the bump 37 is connected to the connection pads P provided on the conductor pattern 23a
- the bumps 38 are connected to the connection pads P provided on the conductor pattern 23b.
- the pitch of the bumps 37 and 38 of the light emitting element is The pitch is equal to or less than twice the pitch d2 of the thin film conductors constituting the conductor patterns 23a and 23b, and is equal to the pitch d2 in this example.
- Other light emitting elements 30 2 to 30 8 also has the same configuration as the light emitting element 30 1. Then, the light emitting element 30 2, the conductor patterns 23b, is arranged between the 23c, it bumps 37 and 38 are respectively connected the conductor pattern 23b, a 23c. Similarly, the light emitting element 30 3, the conductor pattern 23c, are disposed across 23d. Emitting element 30 4, the conductor patterns 23d, is disposed over 23e. The light-emitting element 30 5, conductive patterns 23e, are disposed over 23f. Emitting element 30 6, the conductor pattern 23f, are arranged over 23 g. Emitting element 30 7, the conductor pattern 23g, is disposed over 23h.
- Emitting element 30 8 the conductive pattern 23h, is placed over 23i. Thereby, the conductor patterns 23a to 23i and the light emitting elements 30 1 to 30 8 are connected in series. In the light emitting panel 20, the light emitting elements 30 are arranged at intervals of 10 mm.
- FIG. 8 is a side view of the flexible cable 40. As shown in FIG. 8, the flexible cable 40 includes a base material 41, a conductor layer 43, and a cover lay 42.
- the base material 41 is a rectangular member whose longitudinal direction is the X-axis direction.
- the base material 41 is made of, for example, polyimide, and a conductor layer 43 is formed on the upper surface.
- the conductor layer 43 is formed by patterning a copper foil attached to the upper surface of polyimide.
- the conductor layer 43 includes two conductor patterns 43a and 43b, as shown in FIG.
- the conductor layer 43 formed on the upper surface of the base material 41 is covered with a coverlay 42 that is vacuum-thermocompressed. As shown in FIG. 8, the coverlay 42 is shorter in the X-axis direction than the base material 41. For this reason, the ⁇ X side ends of the conductor patterns 43a and 43b constituting the conductor layer 43 are exposed. Further, the cover lay 42 is provided with an opening 42a, and the + X side ends of the conductor patterns 43a and 43b are exposed from the opening 42a.
- the flexible cable 40 configured as described above has the conductor patterns 43a and 43b exposed from the coverlay 42 at the + X side ends of the conductor patterns 23a and 23i of the light emitting panel 20. It adheres to the light emitting panel 20 in a state in contact with the part.
- the connector 50 is a rectangular parallelepiped component to which a cable routed from a DC power source is connected.
- the connector 50 is mounted on the upper surface of the + X side end of the flexible cable 40.
- the pair of terminals 50 a of the connector 50 are connected to the conductor pattern of the flexible cable 40 through the opening 42 a provided in the cover lay 42. 43a and 43b.
- the reinforcing plate 60 is a rectangular plate-like member whose longitudinal direction is the X-axis direction.
- the reinforcing plate 60 is made of, for example, epoxy resin or acrylic.
- the reinforcing plate 60 is attached to the lower surface of the flexible cable 40 as shown in FIG. For this reason, the flexible cable 40 can be bent between the ⁇ X side end of the reinforcing plate 60 and the + X side end of the light emitting panel 20.
- a method for manufacturing the light emitting panel 20 constituting the light emitting unit 10 will be described.
- a transparent film 21 made of PET is prepared.
- the mesh-shaped conductor layer 23 is formed in the whole statement of the transparent film 21 using a subtracting method or an additive method.
- the conductor layer 23 is cut using an energy beam, for example, a laser to form conductor patterns 23a to 23i.
- the conductor layer 23 is cut by irradiating the conductor layer 23 formed on the surface of the transparent film 21 with a laser beam. Then, the laser spot of the laser beam is moved along the dotted line shown in FIG. As a result, the conductor layer 23 is cut along the dotted slits, and conductor patterns 23a to 23i are formed as shown in FIG.
- connection pads P are formed in advance on the conductor layer 23.
- the connection pad P is provided corresponding to the position where the light emitting element 30 is mounted when the conductor layer 23 is formed.
- the portion in the vicinity of the moving path of the laser spot melts and sublimates.
- the conductor patterns 23a to 23i are cut out and a pair of connection pads P are formed.
- a pair of connection pads P are formed at the positions indicated by black circles in FIG.
- the conductor patterns 23a to 23i integrated with the connection pads P are subdivided with laser light.
- the final-shaped conductor patterns with connection pads 23a to 23i shown in FIG. 14 may be formed in one lithography process without dividing the process into two steps.
- connection pads shown in FIG. 13 are regularly dispersed in the conductor pattern, for example, in a matrix, so that the light-emitting elements required by individual light-emitting devices can be obtained.
- a connection pad may be selected together with the conductor pattern and cut out with a laser beam. In this case, connection pads that are not used for connection of the light emitting elements remain as dummy pads.
- the area used for the circuit becomes the cut-out pattern shown in FIG. 14, and the area not used for the circuit remains the initial pattern shown in FIG.
- thermoplastic resin 240 is provided on the surface of the transparent film 21 on which the conductor patterns 23a to 23i are formed. Then, the light emitting elements 30 1 to 30 8 are disposed on the thermoplastic resin 240. Immediately below the bumps 37, 38 of the light emitting elements 30 1 to 30 8 In this case, the connection pads P formed in the conductor patterns 23a ⁇ 23i is to be positioned, the light-emitting elements 30 1 to 30 8 are positioned.
- the transparent film 22 provided with the thermoplastic resin 240 on the lower surface is disposed on the upper surface side of the transparent film 21. And each of the transparent films 21 and 22 is heated and pressure-bonded in a vacuum atmosphere. Thereby, first, the bumps 37 and 38 formed on the light emitting element 30 penetrate the thermoplastic resin 240, reach the conductor patterns 23a to 23i, and are electrically connected to the conductor patterns 23a to 23i. Then, the thermoplastic resin 240 is filled between the conductive pattern 25 and the transparent films 21 and 22 and the light emitting element 30 without a gap. As shown in FIG. 3, the thermoplastic resin 240 becomes a resin layer 24 that holds the light emitting element 30 between the transparent films 21 and 22. The light emitting panel 20 is completed through the above steps.
- thermoplastic resin 240 a sheet-like one may be used or applied. Further, instead of using the upper thermoplastic resin 240, only the lower thermoplastic resin 240 may be used. The whole is pressed with the upper and lower two layers of thermoplastic resin 240 sandwiched between the light emitting elements to obtain an electrical connection between the electrodes and the conductor pattern, and then the electrodes of the light emitting elements of the two layers of thermoplastic resin 240 The thermoplastic resin 240 located on the opposite side is peeled off, and the thermoplastic resin 240 having the same thickness as the peeled thermoplastic resin 240 and the final transparent film 22 are covered to obtain a similar configuration. Good.
- the thermoplastic resin 240 is, for example, a thermoplastic elastomer. In addition, although the thermoplastic resin was used as the resin layer, it is not limited to this.
- the flexible cable 40 with the reinforcing plate 60 attached thereto is connected to the light emitting panel 20 configured as described above, and the connector 50 is mounted on the flexible cable 40.
- the light emitting unit 10 shown in FIG. 10 is connected to the light emitting panel 20 configured as described above, and the connector 50 is mounted on the flexible cable 40.
- the light emitting element 30 constituting the light emitting panel 20 emits light. Since the rated voltage of the light emitting element 30 is approximately 2.5V, in the light emitting unit 10, a voltage of about 20V is applied to the conductor patterns 43a and 43b.
- FIG. 18 is a block diagram of the light emitting device 100 including the light emitting unit 10. As shown in FIG. 18, the light emitting device 100 configured as described above is used together with a driving device 70 and a control device 80 that controls the driving device 70.
- the control device 80 has a CPU (Central Processing Unit), a main storage unit that is a work area of the CPU, and an auxiliary storage unit that stores a program to be executed by the CPU.
- a drive signal is output to the drive device 70 by executing a program read from the auxiliary storage unit by the CPU.
- the driving device 70 applies a DC voltage to the light emitting unit 10 based on an instruction from the control device 80. Thereby, the light emitting unit 10 is controlled based on the program.
- the light emitting elements 30 are connected by the conductor patterns 23a to 23i.
- These conductor patterns 23a to 23i are formed of a metal thin film having a line width of about 10 ⁇ m.
- Metals such as copper (Cu) and silver (Ag) are opaque metal materials, but the openings of the mesh pattern transmit light. For this reason, the transparency and flexibility of the light emitting panel 20 can be sufficiently secured.
- the conductor patterns 23a to 23i are formed in a planar shape, the resistance value of the circuit that supplies power to the light emitting element 30 can be reduced. Thereby, electric power can be efficiently supplied to the light emitting element.
- a conductor layer 23 composed of conductor patterns 23a to 23i is formed on the upper surface of the transparent film 21 of the pair of transparent films 21 and 22.
- the light emitting panel 20 according to the present embodiment is thinner than the light emitting panel in which the conductor layers are formed on both the upper surface and the lower surface of the light emitting element 30. As a result, the flexibility and transparency of the light emitting panel 20 can be improved.
- the present invention is not limited thereto, and the outer edges of the conductor patterns 23b to 23i may be bent as shown in FIG.
- the light emitting elements 30 can be arranged so that the outer edges thereof are parallel to the X axis.
- FIG. 20 is a diagram illustrating a light emitting panel 20 according to a modification.
- the light emitting panel 20 has a pair of conductor patterns 23x, 23y on the transparent film 21 with the longitudinal direction as the X-axis direction.
- a conductor pattern 26A made of copper or silver is connected to the entire outer edge on the ⁇ Y side of the conductor pattern 23x.
- the conductor pattern 26B made of copper or silver is also connected to the entire outer edge on the + Y side of the conductor pattern 23y.
- the line widths of the conductor patterns 26A and 26B are extremely larger than the line widths of the metal thin films constituting the conductor patterns 23y and 23x.
- each light-emitting elements 30 1 to 30 8 the bumps 37 are connected to the conductor pattern 23x, in a state where the bumps 38 are connected to the conductor pattern 23y, it is arranged along the X-axis.
- a DC power supply 200 is connected via a connector 50 between the conductor pattern 26A and the conductor pattern 26B.
- This DC power supply 200 the voltage between the conductive pattern 26A and the conductive pattern 26B is applied, a voltage is applied to the light-emitting elements 30 1 to 30 8.
- the light emitting elements 30 1 to 30 8 emit light.
- a conductor pattern 26A made of copper or silver is connected to the entire outer edge on the ⁇ Y side of the conductor pattern 23x.
- a conductor pattern 26B made of copper or silver is connected to the entire outer edge on the + Y side of the conductor pattern 23y.
- the resistance values per unit volume of the conductor patterns 26A and 26B are significantly smaller than the resistance values per unit volume of the conductor patterns 23x and 23y.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series.
- the light emitting elements 30 11 to 30 18 may be connected in parallel to the light emitting elements 30 1 to 30 8, respectively.
- the black circle indicates the anode electrode.
- the respective light emitting elements 30 1 to 30 8 polar, while being matched polarity of the light emitting element 30 11-30 18, for each light emitting element 30 1 to 30 8, the light emitting element 30
- each of the polar light-emitting elements 30 1 to 30 8 as the polarity of the light emitting element 30 11-30 18 are opposite to each other, the light-emitting elements 30 1 to 30 8 for each By connecting the light emitting elements 30 11 to 30 18 in parallel, the light emitting elements 30 1 to 30 8 and the light emitting elements 30 11 to 30 18 can be lit separately. Specifically, by reversing the voltage applied to the connector 50, each of the light emitting elements 30 1 to 30 8 and each of the light emitting elements 30 11 to 30 18 can be turned on alternately.
- a pair of light emitting elements 30 that emit light of different color tones are connected in parallel so that the polarities are opposite to each other as described above, whereby different colors are alternately used by using one light emitting unit 10. It can be reproduced.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are arranged in one row and connected in series to each other.
- the light emitting elements 30 may be arranged in a plurality of rows.
- a plurality of conductor patterns 23m are arranged in a matrix form with four in the Y-axis direction and three in the X-axis direction between a pair of conductor patterns 23a. Yes. Between each of the conductor patterns 23a and 23m, an insulating band 21a is formed by removing the conductive film.
- Each of the light emitting elements 30 1 to 30 4 arranged in the X-axis direction, each of the light emitting elements 30 5 to 30 8, each of the light emitting elements 30 9 to 30 12, and each of the light emitting elements 30 13 to 30 16 are connected in series. It is connected. Then, an element group consisting of light emitting elements 30 1 to 30 4 connected in series, an element group consisting of light emitting elements 30 5 to 30 8 , an element group consisting of light emitting elements 30 9 to 30 12 , and a light emitting element 30 9 the element group consisting of 30 12 are connected in parallel.
- conductor patterns 26A and 26B made of copper or silver are connected to the entire outer edges of the two conductor patterns 23a, respectively.
- a DC power source 200 is connected between the conductor patterns 26A and 26B via the connector 50.
- This DC power supply 200 the voltage between the conductive pattern 26A and the conductive pattern 26B is applied, a voltage is applied to the light-emitting elements 30 1 to 30 16.
- the light emitting elements 30 1 to 30 16 emit light.
- the light emitting elements 30 1 to 30 16 emit light.
- the light emitting panel 20 can emit light in a planar shape.
- another light emitting element 30 17 to 30 32 may be connected in parallel to each of the light emitting elements 30 1 to 30 16 .
- the light emitting elements 30 1 to 30 32 can be turned on simultaneously.
- the polarities of the light emitting elements 30 1 to 30 16 and the polarities of the light emitting elements 30 17 to 30 32 are opposite, for example, by connecting an AC power supply instead of the DC power supply 200, the light emitting elements 30 1 to 30 30 16 and the light emitting elements 30 17 to 30 32 can be turned on alternately.
- the light emitting panel 20 can emit light with different colors alternately.
- the light-emitting panel 20 it is necessary to apply a voltage to the pair of conductor patterns 23a located at the outer edge on the ⁇ X side and the outer edge on the + X side, as shown in FIG. In this case, it is necessary to route opaque wiring around the light emitting panel 20. Therefore, as shown in FIG. 25, one conductor pattern 23a may be routed to the vicinity of the other conductor pattern 23a. According to this, as shown in FIG. 25, it is only necessary to arrange the opaque wiring on one outer edge side (+ X side). Therefore, the use of the light emitting panel 20 can be expected to expand.
- a metal layer made of copper or silver with the Y direction as the longitudinal direction may be attached to the entire outer edge on the ⁇ X side of the upper conductor pattern 23a that bundles the series circuit.
- FIG. 26 shows an example in which the light emitting elements 30 are arranged in a curved line.
- conductor patterns MP2 to MP8 are arranged in series with respect to the conductor pattern MP1
- conductor patterns MP9 to MP15 are arranged in series with respect to the conductor pattern MP1.
- the light emitting element 30 is arrange
- the example shown in FIG. 26 is a series-parallel circuit of light-emitting elements.
- a positive (negative) potential is applied to the transparent conductor pattern MP1 from both sides of the lower side, and two are simultaneously applied to the central two series circuits.
- two negative (positive) potentials are alternately applied, the light-emitting elements of the two series circuits can be turned on simultaneously or in time series.
- the light emitting element 30 can be arranged to be lit at an arbitrary position.
- the subdivided conductor patterns are provided on the three sides of the substrate. However, the subdivided conductor patterns may be provided outside the two series circuits between the two series circuits. .
- FIG. 27 is a diagram showing exemplary light-emitting element 30 1 of the light-emitting elements 30 1 to 30 8 of the present embodiment.
- Emitting element 30 1 is the square LED chip, as shown in FIG. 27, a base substrate 31, N-type semiconductor layer 32 formed on the upper surface of the base substrate 31, active layer 33 and the P-type semiconductor layer 34 And have.
- a pad 36 is formed on the lower surface of the base substrate 31, and a pad 35 is formed on the upper surface of the P-type semiconductor layer 34.
- a hemispherical bump 38 is formed on the pad 35.
- FIG. 28 is a perspective view showing the transparent films 21 and 22 constituting the light emitting panel 20.
- an L-shaped conductor pattern 23a and rectangular conductor patterns 23b to 23e arranged along the outer edge on the ⁇ Y side of the transparent film 21 are formed on the lower surface of the transparent film 21.
- rectangular conductor patterns 23g to 23i arranged along the outer edge on the ⁇ Y side of the transparent film 22 are formed.
- FIG. 29 is a side view of the light-emitting panel 20. As shown in FIG. 29, the light emitting elements 30 1 to 30 8 are held by the resin layer 24 filled between the transparent film 21 and the transparent film 22.
- the light emitting element 30 1 is disposed between the conductor patterns 23a and the conductor pattern 23f.
- Emitting element 30 2 is disposed between the conductor pattern 23f and the conductor pattern 23b.
- Emitting element 30 3 is arranged between the conductor patterns 23b and the conductor pattern 23 g.
- Emitting element 30 4 is disposed between the conductor pattern 23g and the conductor pattern 23c.
- the light-emitting element 30 5 is disposed between the conductor patterns 23c and the conductor patterns 23h.
- Emitting element 30 6 is arranged between the conductor patterns 23h and the conductor patterns 23d.
- Emitting element 30 7 is arranged between the conductor patterns 23d and the conductor pattern 23i.
- Emitting element 30 8 is arranged between the conductor patterns 23i and the conductor pattern 23e.
- the bumps 38 are connected to the conductor pattern of the transparent film 22, and the pads 36 are connected to the conductor pattern of the transparent film 21. .
- the bumps 38 are connected to the conductor pattern of the transparent film 21, and the pads 36 are connected to the conductor pattern of the transparent film 22. As a result, the light emitting elements 30 1 to 30 8 are connected in series.
- a mesh-like conductor layer 23 is formed on the surfaces of the transparent films 21 and 22 made of PET using a subtracting method or an additive method.
- the conductor layer 23 is cut using a laser to form conductor patterns 23a to 23e on the surface of the transparent film 21, and conductor patterns 23f to 23i are formed on the surface of the transparent film 22.
- connection pads P are formed in the respective conductor patterns 23a to 23i.
- thermoplastic resin is provided on the surface of the transparent film 21, and the light emitting elements 30 1 to 30 8 are disposed on the thermoplastic resin. Then, the transparent film 22 provided with the thermoplastic resin on the lower surface is disposed on the upper surface side of the transparent film 21. These are heated and pressure-bonded in a vacuum atmosphere. The light emitting panel 20 is completed through the above steps.
- the light emitting elements 30 are connected by the conductor patterns 23a to 23i.
- These conductor patterns 23a to 23i are formed of a metal thin film having a line width of about 10 ⁇ m. For this reason, the transparency and flexibility of the light emitting panel 20 can be sufficiently secured. Further, since the conductor patterns 23a to 23i are formed in a planar shape, the resistance value of the circuit that supplies power to the light emitting element 30 can be reduced. Thereby, electric power can be efficiently supplied to the light emitting element.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series.
- the light emitting elements 30 11 to 30 18 may be connected in parallel to the light emitting elements 30 1 to 30 8 .
- a white circle indicates the anode electrode.
- the light emitting elements 30 11 to 30 18 are connected in parallel to the light emitting elements 30 1 to 30 8, respectively.
- each of the light emitting elements 30 1 to 30 8 and each of the light emitting elements 30 11 to 30 18 can be turned on simultaneously.
- each of the polar light-emitting elements 30 1 to 30 8 as the polarity of the light emitting element 30 11-30 18 are opposite to each other, each light-emitting element 30 1 to 30 8
- the light emitting elements 30 1 to 30 8 and the light emitting elements 30 11 to 30 18 can be lit separately.
- each of the light emitting elements 30 1 to 30 8 and each of the light emitting elements 30 11 to 30 18 can be turned on alternately.
- a pair of light emitting elements 30 that emit light of different color tones are connected in parallel so that the polarities are opposite to each other as described above, whereby different colors are alternately used by using one light emitting unit 10. It can be reproduced.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series has been described.
- the number of the light emitting elements 30 is not limited to this.
- a metal piece 39 such as a copper chip may be disposed in place of any one of the light emitting elements 30 as shown in FIG.
- the light emitting elements may be arranged in a matrix composed of a plurality of columns and a plurality of rows.
- the mesh pattern is made of copper or silver.
- the mesh pattern is not limited to this, and may be made of metal such as gold (Au) or platinum (Pt).
- FIG. 33A, FIG. 33B, FIG. 34A, and FIG. 34B are plan views for explaining the mode of the mesh pattern connection pads P used in the light-emitting elements having the double-sided electrode configuration described in FIGS.
- connection with the mesh pattern includes a connection on the bump side (A) and a connection on the back side opposite to the bump (B).
- conductive bumps are provided on the surface electrode of the light emitting element as described above.
- FIG. 33A shows an example of the connection pad P in the case of (A) a), and FIG. 33B shows an example of the pad in the case of (A) b).
- connection is made to the side opposite to the bump of the light emitting element, that is, the back electrode, and the connection to the mesh pattern is: B) Place a mesh smaller than the size of the chip (mesh area is about 1/2 to 1.5 times the size of the chip), c) No pad, and mesh intersection There is a method such as disposing an electrode on the opposite side of the bump.
- Fig. 34A shows an example of the connection pad P in the case of (B) a), and Fig. 34B shows an example of the pad in the case of (B) b).
- the pad on the bump side is slightly smaller than the mesh ridge, and the pad on the opposite side is the same size as the mesh ridge, but this is not restrictive.
- connection pad P may be at an intersection of mesh patterns, or between two mesh intersections of mesh patterns so as to straddle two meshes. Also good. Further, as shown in FIGS. 34A and 34B, when the pads are the same size as the mesh ridges, the mesh pads can be arranged so that the connection pads P block the ridges.
- FIGS. 33A, 33B, 34A, and 34B may be manufactured in two processing steps, but the patterning is not divided into two steps, and FIG. 33A, FIG. 33B, FIG. A mesh pattern with connection pads having a final shape as shown in FIG. 34B may be formed by one photolithography process.
- the mesh patterns shown in FIGS. 33A, 33B, 34A, and 34B are used, and any one of the connection pads P is regularly dispersed in the mesh pattern, for example, in a matrix, so that the individual light emitting devices are used.
- the region to be used for the circuit may be selected in accordance with the connection layout of the light emitting elements required in (1).
- the light emitting unit 10 according to the present embodiment is different from the light emitting unit according to the first embodiment in that the conductor pattern is not a mesh pattern but a substantially transparent conductor.
- FIG. 35 is a plan view of the light emitting unit 10.
- the conductor layer 23 is arranged along the L-shaped conductor pattern 23 a formed along the + Y side outer edge of the transparent film 21 and the ⁇ Y side outer edge of the transparent film 21.
- the conductor patterns 23a to 23i are made of a transparent conductive material such as indium tin oxide (ITO: Indium Tin Oxide).
- ITO Indium Tin Oxide
- the transparent film 22 is shorter in the X-axis direction than the transparent film 21. Therefore, as can be seen with reference to FIG. 3, the + X side ends of the conductor pattern 23 a and the conductor pattern 23 i constituting the conductor layer 23 are exposed.
- a method for manufacturing the light emitting panel 20 constituting the light emitting unit 10 will be described.
- a transparent film 21 made of PET is prepared, and a conductor layer 23 made of ITO is formed on the surface by sputtering or vapor deposition.
- the conductor layers 23a to 23i are formed by patterning the conductor layer 23 using a laser.
- the conductive layer 23 is patterned by irradiating the ITO film formed on the entire top surface of the transparent film 21 with laser light. Then, the laser spot of the laser beam is moved along the dotted line shown in FIG. As a result, the conductor layer 23 is cut along the dotted slits, and conductor patterns 23a to 23i are formed as shown in FIG. A conductor pattern 25 surrounding these conductor patterns 23 a to 23 i is formed along the outer edge of the transparent film 21.
- the conductor pattern 25 is cut at a position indicated by an arrow in FIG. 38 using a laser. Thereby, as shown in FIG. 39, the conductor pattern 25 is subdivided into a plurality of small pieces 25a.
- the plurality of small pieces 25a are electrically insulated from each other and from the conductor patterns 23a to 23i.
- thermoplastic resin 240 is provided on the surface of the transparent film 21 on which the conductor patterns 23a to 23i are formed. Then, the light emitting elements 30 1 to 30 8 are disposed on the thermoplastic resin 240.
- the transparent film 22 provided with the thermoplastic resin 240 on the lower surface is disposed on the upper surface side of the transparent film 21. And each of the transparent films 21 and 22 is heated and pressure-bonded in a vacuum atmosphere. Thereby, first, the bumps 37 and 38 formed on the light emitting element 30 penetrate the thermoplastic resin 240, reach the conductor patterns 23a to 23i, and are electrically connected to the conductor patterns 23a to 23i. And the thermoplastic resin 240 is filled between the conductor pattern 25, the small piece 25a, the transparent films 21 and 22, and the light emitting element 30 without a gap. As shown in FIG. 3, the thermoplastic resin 240 becomes a resin layer 24 that holds the light emitting element 30 between the transparent films 21 and 22. The light emitting panel 20 is completed through the above steps.
- the flexible cable 40 with the reinforcing plate 60 attached thereto is connected to the light emitting panel 20 configured as described above, and the connector 50 is mounted on the flexible cable 40.
- the light emitting unit 10 shown in FIG. 10 is connected to the light emitting panel 20 configured as described above, and the connector 50 is mounted on the flexible cable 40.
- the light emitting elements 30 are connected by the conductor patterns 23a to 23i.
- These conductor patterns 23a to 23i are formed as a planar pattern by patterning a transparent ITO film formed on the upper surface of the transparent film 21. Since the ITO film is highly transparent and flexible, the transparency and flexibility of the light emitting panel 20 can be sufficiently secured. Further, since the conductor patterns 23a to 23i are formed in a planar shape, the resistance value of the circuit that supplies power to the light emitting element 30 can be reduced. Thereby, electric power can be efficiently supplied to the light emitting element.
- a conductor layer 23 composed of conductor patterns 23a to 23i is formed on the upper surface of the transparent film 21 of the pair of transparent films 21 and 22.
- the light emitting panel 20 according to the present embodiment is thinner than the light emitting panel in which the conductor layers are formed on both the upper surface and the lower surface of the light emitting element 30. As a result, the flexibility and transparency of the light emitting panel 20 can be improved.
- the ITO film formed on the surface of the transparent film 21 is patterned using laser light.
- the conductor pattern 25 formed around the conductor patterns 23a to 23i is subdivided into a plurality of small pieces 25a. For this reason, the influence of the conductive relics generated in the manufacturing process of the light emitting panel 20 can be reduced.
- the conductor pattern 25 when the conductor pattern 25 is not subdivided, the conductive foreign matter 91 adheres over the conductor pattern 25 and the conductor pattern 23f, and the conductive foreign matter 92 is 25 and the conductor pattern 23g, the conductor pattern 23f and the conductor pattern 23g are connected via the conductor pattern 25.
- the light emitting element 30 arranged over the conductor pattern 23f and the conductor pattern 23g does not light up.
- the conductor pattern 25 when the conductor pattern 25 is subdivided, the conductive foreign matter 91 adheres over the conductor pattern 25 and the conductor pattern 23f, and the conductive foreign matter 92 is attached to the conductor pattern 25 and the conductor.
- the conductor pattern 23f and the conductor pattern 23g are not connected via the conductor pattern 25. Therefore, the influence of the conductive relics generated in the manufacturing process of the light emitting panel 20 is reduced.
- the present invention is not limited thereto, and the outer edges of the conductor patterns 23b to 23i may be bent as shown in FIG.
- the light emitting elements 30 can be arranged so that the outer edges thereof are parallel to the X axis.
- the case where the light emitting elements 30 are connected in series has been described. Not limited to this, the light emitting elements 30 may be connected in parallel as shown in FIG.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series.
- the light emitting elements 30 11 to 30 18 may be connected in parallel to the light emitting elements 30 1 to 30 8, respectively.
- each of the polar light-emitting elements 30 1 to 30 8 as the polarity of the light emitting element 30 11-30 18 are opposite to each other, the light-emitting elements 30 1 to 30 8 for each By connecting the light emitting elements 30 11 to 30 18 in parallel, the light emitting elements 30 1 to 30 8 and the light emitting elements 30 11 to 30 18 can be lit separately.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are arranged in one row and connected in series to each other has been described.
- the light emitting elements 30 may be arranged in a plurality of rows.
- a plurality of conductor patterns 23m are arranged in a matrix form with four in the Y-axis direction and three in the X-axis direction between a pair of conductor patterns 23a. Yes. Between each of the conductor patterns 23a and 23m, an insulating band 21a is formed by removing the conductive film.
- Each of the light emitting elements 30 1 to 30 4 arranged in the X-axis direction, each of the light emitting elements 30 5 to 30 8, each of the light emitting elements 30 9 to 30 12, and each of the light emitting elements 30 13 to 30 16 are connected in series. It is connected. Then, an element group consisting of light emitting elements 30 1 to 30 4 connected in series, an element group consisting of light emitting elements 30 5 to 30 8 , an element group consisting of light emitting elements 30 9 to 30 12 , and a light emitting element 30 9 the element group consisting of 30 12 are connected in parallel.
- conductor patterns 26A and 26B made of copper or silver are connected to the entire outer edges of the two conductor patterns 23a, respectively.
- a DC power source 200 is connected between the conductor patterns 26A and 26B via the connector 50.
- This DC power supply 200 the voltage between the conductive pattern 26A and the conductive pattern 26B is applied, a voltage is applied to the light-emitting elements 30 1 to 30 16.
- the light emitting elements 30 1 to 30 16 emit light.
- the light emitting elements 30 1 to 30 16 emit light.
- the light emitting panel 20 can emit light in a planar shape.
- another light emitting element 30 17 to 30 32 may be connected in parallel to each of the light emitting elements 30 1 to 30 16 .
- the light emitting elements 30 1 to 30 32 can be turned on simultaneously.
- the polarities of the light emitting elements 30 1 to 30 16 and the polarities of the light emitting elements 30 17 to 30 32 are opposite, for example, by connecting an AC power supply instead of the DC power supply 200, the light emitting elements 30 1 to 30 30 16 and the light emitting elements 30 17 to 30 32 can be turned on alternately.
- the light emitting panel 20 can emit light with different colors alternately.
- the light emitting panel 20 As shown in FIG. 43, it is necessary to apply a voltage to the pair of conductor patterns 23a located at the outer edge on the ⁇ X side and the outer edge on the + X side. In this case, it is necessary to route opaque wiring around the light emitting panel 20. Therefore, as shown in FIG. 44, one conductor pattern 23a may be routed to the vicinity of the other conductor pattern 23a. According to this, as shown in FIG. 44, it is only necessary to arrange the opaque wiring on one outer edge side (+ X side). Therefore, the use of the light emitting panel 20 can be expected to expand.
- a metal layer made of copper or silver whose longitudinal direction is the Y-axis direction may be attached to the entire outer edge on the ⁇ X side of the upper conductor pattern 23a that bundles the series circuit.
- the case where the light emitting elements 30 are arranged on a straight line has been described. Not only this but the light emitting element 30 may be arranged on the curve, as FIG. 26 shows.
- FIG. 45 is a diagram showing an example in which a finely divided conductor pattern S having a pitch smaller than that of a conductor pattern constituting a circuit is provided on all except the connection portion of the light emitting element 30.
- a colored portion in the figure indicates a separation groove.
- the subdivided conductor pattern S surrounded by the separation groove is formed between the conductor pattern 23a and the conductor pattern 23b in the circuit portion, and the conductor patterns 23a and 23b in the circuit portion and the conductor pattern around the light emitting panel. Between.
- By providing such a subdivided conductor pattern S around the conductor pattern of the circuit portion it is possible to uniformly reduce the leak path caused by the conductive foreign matter.
- channel was illustrated in the figure, if desired, it may be a groove
- the region where the light emitting element 30 is attached is not provided with a subdivided conductor pattern, and only a groove exists.
- the light emitting unit 10 according to the present embodiment is different from the light emitting unit according to the second embodiment in that the conductor pattern is not a mesh pattern but a substantially transparent conductor.
- the conductor patterns 23a to 23i shown in FIG. 28 are made of a transparent conductive material made of indium tin oxide (ITO). As shown in FIG. 29, the light emitting elements 30 1 to 30 8 are held by the resin layer 24 filled between the transparent film 21 and the transparent film 22.
- ITO indium tin oxide
- the light emitting element 30 1 is disposed between the conductor patterns 23a and the conductor pattern 23f.
- Emitting element 30 2 is disposed between the conductor pattern 23f and the conductor pattern 23b.
- Emitting element 30 3 is arranged between the conductor patterns 23b and the conductor pattern 23 g.
- Emitting element 30 4 is disposed between the conductor pattern 23g and the conductor pattern 23c.
- the light-emitting element 30 5 is disposed between the conductor patterns 23c and the conductor patterns 23h.
- Emitting element 30 6 is arranged between the conductor patterns 23h and the conductor patterns 23d.
- Emitting element 30 7 is arranged between the conductor patterns 23d and the conductor pattern 23i.
- Emitting element 30 8 is arranged between the conductor patterns 23i and the conductor pattern 23e.
- the bumps 38 are connected to the conductor pattern of the transparent film 22, and the pads 36 are connected to the conductor pattern of the transparent film 21. .
- the bumps 38 are connected to the conductor pattern of the transparent film 21, and the pads 36 are connected to the conductor pattern of the transparent film 22. As a result, the light emitting elements 30 1 to 30 8 are connected in series.
- a method for manufacturing the light emitting panel 20 constituting the light emitting unit 10 will be described.
- a transparent film 21 made of PET is prepared, and a conductor layer 23 made of ITO is formed on the entire surface by sputtering or vapor deposition. Then, this conductor layer 23 is patterned using a laser to form conductor patterns 23a to 23f.
- the ITO film formed on the upper surface of the transparent film 21 is irradiated with laser light. Then, the laser spot of the laser beam is moved along the dotted line shown in FIG. As a result, the conductor layer 23 is cut along the dotted line, and conductor patterns 23a to 23e are formed as shown in FIG. A conductor pattern 25 surrounding these conductor patterns 23 a to 23 e is formed along the outer edge of the transparent film 21.
- the conductor pattern 25 is cut using a laser. Thereby, as shown in FIG. 48, the conductor pattern 25 is subdivided into a plurality of small pieces 25a.
- the plurality of small pieces 25a are electrically insulated from each other and from the conductor patterns 23a to 23e.
- a transparent film 22 made of PET is prepared, and a conductor layer 23 made of ITO is formed on the entire surface using a sputtering method. Then, the conductor layer 23 is patterned using a laser to form conductor patterns 23f to 23i.
- the conductive layer 23 is patterned by irradiating the ITO film formed on the upper surface of the transparent film 22 with laser light. Then, the laser spot of the laser beam is moved along the dotted line shown in FIG. As a result, the conductor layer 23 is cut along the dotted slits, and conductor patterns 23f to 23i are formed as shown in FIG. In addition, a conductor pattern 25 surrounding these conductor patterns 23f to 23i is formed.
- the conductor pattern 25 is cut using a laser. Thereby, as shown in FIG. 51, the conductor pattern 25 is subdivided into a plurality of small pieces 25a.
- the plurality of small pieces 25a are electrically insulated from each other and also from the conductor patterns 23f to 23i.
- thermoplastic resin is applied to the surface of the transparent film 21, and the light emitting elements 30 1 to 30 8 are placed on the thermoplastic resin.
- coated to the lower surface is arrange
- FIG. These are heated and pressure-bonded in a vacuum atmosphere.
- the light emitting panel 20 is completed through the above steps.
- the light emitting elements 30 are connected by the conductor patterns 23a to 23i.
- These conductor patterns 23a to 23i are formed as a planar pattern by patterning a transparent ITO film formed on the upper surface of the transparent film 21. Since the ITO film is highly transparent and flexible, the transparency and flexibility of the light emitting panel 20 can be sufficiently secured. Further, since the conductor patterns 23a to 23i are formed in a planar shape, the resistance value of the circuit that supplies power to the light emitting element 30 can be reduced. Thereby, electric power can be efficiently supplied to the light emitting element.
- the conductor patterns 23a to 23i of the light emitting panel 20 are formed, the ITO film formed on the surfaces of the transparent films 21 and 22 is patterned using laser light. At that time, as shown in FIGS. 48 and 49, the conductor pattern 25 formed around the conductor patterns 23a to 23i is subdivided into a plurality of small pieces 25a. For this reason, the influence of the conductive relics generated in the manufacturing process of the light emitting panel 20 can be reduced.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series.
- the light emitting elements 30 11 to 30 18 may be connected in parallel to the light emitting elements 30 1 to 30 8, respectively.
- a white circle indicates an anode electrode.
- the light emitting elements 30 1 to 30 8 are made to correspond to the light emitting elements 30 1 to 30 8 in a state where the polarities of the light emitting elements 30 1 to 30 8 and the polarities of the light emitting elements 30 11 to 30 18 are matched.
- each of the polar light-emitting elements 30 1 to 30 8 as the polarity of the light emitting element 30 11-30 18 are opposite to each other, each light-emitting element 30 1 to 30 8
- the light emitting elements 30 1 to 30 8 and the light emitting elements 30 11 to 30 18 can be lit separately.
- each of the light emitting elements 30 1 to 30 8 and each of the light emitting elements 30 11 to 30 18 can be turned on alternately.
- a pair of light emitting elements 30 that emit light of different color tones are connected in parallel so that the polarities are opposite to each other as described above, whereby different colors are alternately used by using one light emitting unit 10. It can be reproduced.
- the eight light emitting elements 30 1 to 30 8 constituting the light emitting panel 20 are connected in series has been described.
- the number of the light emitting elements 30 is not limited to this.
- a metal piece 39 such as a copper chip may be disposed in place of any one of the light emitting elements 30 as shown in FIG.
- the light emitting elements may be arranged in a matrix composed of a plurality of columns and a plurality of rows.
- the line width d1 of the thin film conductors constituting the conductor pattern is 10 ⁇ m and the arrangement pitch d2 of the thin film conductors is about 300 ⁇ m has been described.
- the values of the line width d1 and the array pitch d2 can be variously changed.
- the line width d1 is preferably in the range of 1 ⁇ m to 100 ⁇ m
- the arrangement pitch d2 is preferably in the range of 10 ⁇ m to 1000 ⁇ m.
- FIG. 54 shows a correspondence table showing the transmittance Pe corresponding to the line width d1 and the arrangement pitch d2.
- the units of the arrangement pitches d1 and d2 are microns ( ⁇ m).
- the line width d1 and the arrangement pitch d2 are set so that the transmittance Pe becomes 75% or more, for example, with reference to FIG.
- the resistance of the conductor pattern is 100 ⁇ or less, for example, it is conceivable to set the line width d1 and the arrangement pitch d2 corresponding to the colored matrix.
- the light emitting unit 10 including the eight light emitting elements 30 has been described. Not limited to this, the light emitting unit 10 may include 9 or more or 7 or less light emitting elements.
- the conductor pattern is made of copper or silver.
- the conductive pattern is not limited thereto, and may be made of metal such as gold (Au) or platinum (Pt).
- the conductor pattern is formed by patterning the conductor layer 23 using a laser.
- the present invention is not limited to this, and a conductive pattern made of ITO may be formed by printing on the transparent film 21 an ITO ink generated by converting the ITO into an ink.
- the transparent conductive film is irradiated with an energy beam in an oxidizing or nitriding atmosphere, and the irradiation region is made into an insulating layer to separate the transparent conductive film. You may do it. That is, the insulating band can be a groove or an insulating layer.
- ITO is used as the conductor pattern.
- a transparent conductive material such as fluorine-doped tin oxide (FTO), zinc oxide, and indium zinc oxide (IZO) can also be used.
- FTO fluorine-doped tin oxide
- IZO indium zinc oxide
- the conductor pattern can be formed by, for example, forming a thin film by applying a sputtering method, an electron beam vapor deposition method, or the like, and patterning the obtained thin film by laser processing, etching treatment, or the like.
- the bump may be gold, AuSn alloy, silver, copper, nickel or an alloy with other metals, a mixture, a eutectic, an amorphous material, solder, eutectic solder, metal A mixture of fine particles and resin, an anisotropic conductive film, or the like may be used.
- wire bumps using wire bonders, electrolytic plating, electroless plating, inks containing metal fine particles were baked by ink jet printing, pastes containing metal fine particles were formed, applied ball mounts, pellet mounts, vapor deposition sputtering, etc.
- a bump may be used.
- the conductive bump can be formed of a mixture of metal fine particles and resin.
- a metal such as silver (Ag) or copper (Cu) or an alloy thereof is mixed with a thermosetting resin to make a paste, and droplets of the paste are sprayed onto the electrode by an ink jet method or a needle dispensing method to form a protrusion.
- the conductive layer bumps may be formed by hardening by heat treatment.
- the melting point of the bump is preferably 180 ° C. or higher, more preferably 200 ° C. or higher.
- An upper limit is 1100 degrees C or less as a practical range. If the melting point of the bump is less than 180 ° C., the bump will be greatly deformed in the vacuum heat press process in the manufacturing process of the light emitting device, and the sufficient thickness cannot be maintained or it will protrude from the electrode, reducing the luminous intensity of the LED. Inconvenience occurs.
- the melting point of the bump is, for example, a melting point value measured using a sample of about 10 mg at a heating rate of 5 ° C./min using a DSC-60 differential scanning calorimeter manufactured by Shimadzu Corporation. When the liquidus temperature is different, it is the value of the solidus temperature.
- the dynamic hardness DHV of the bump is 3 or more and 150 or less, preferably 5 or more and 100 or less, and more preferably 5 or more and 50 or less.
- the dynamic hardness DHV of the bump is less than 3, the bump is greatly deformed in the vacuum hot pressing process in the manufacturing process of the light emitting device, and a sufficient thickness cannot be maintained. In addition, the bump protrudes from the electrode, causing problems such as a decrease in the luminous intensity of the LED.
- the dynamic hardness DHV of the bump exceeds 150, it is not preferable because the bump deforms the translucent support base in the vacuum hot pressing process in the manufacturing process of the light emitting device, thereby causing poor appearance and poor connection.
- the dynamic hardness DHV of the bump is obtained, for example, by a test using a Shimadzu dynamic ultrafine hardness meter DUH-W201S manufactured by Shimadzu Corporation at 20 ° C.
- a diamond regular pyramid indenter (Vickers indenter) having a facing angle of 136 ° is pushed into the bump at a load speed of 0.0948 mN / sec.
- the test force (P / mN) when the indenter indentation depth (D / ⁇ m) reaches 0.5 ⁇ m is substituted into the following equation.
- the height of the bump is preferably 5 ⁇ m or more and 50 ⁇ m or less, and more preferably 10 ⁇ m or more and 30 ⁇ m or less. If the bump height is less than 5 ⁇ m, the effect of preventing a short circuit between the conductor pattern and the P-type semiconductor layer or between the conductor pattern and the N-type semiconductor layer is weakened. On the other hand, if it exceeds 50 ⁇ m, the bump deforms the translucent support base in the vacuum hot pressing step in the manufacturing process of the light emitting device, which is not preferable.
- the contact area of the electrode and the bump of the light emitting diode body is preferably 100 [mu] m 2 or more 15,000 2 or less, more preferably 400 [mu] m 2 or more 8,000Myuemu 2 or less.
- Each of these dimensions is a value measured in a stable environment where the room temperature and the temperature of the object to be measured are 20 ° C. ⁇ 2 ° C.
- the electrode of the light emitting diode main body and the conductor pattern of the translucent support base are connected by a vacuum hot press using bumps. Therefore, at least a part of the bump is not electrically melted during vacuum hot pressing and is electrically connected to the electrode of the light emitting diode. For this reason, the contact angle between the electrode surface of the light emitting diode body and the bump is preferably, for example, 135 degrees or less.
- a sheet layer may be used as a resin layer formed between the transparent films, for example, a thermoplastic resin. And may be applied. Further, only the lower thermoplastic resin may be used without using the upper thermoplastic resin. Pressing the whole with two layers of upper and lower thermoplastic resin sandwiching the light emitting element to obtain an electrical connection between the electrode and the conductor pattern, and then out of the two layers of thermoplastic resin opposite to the electrode of the light emitting element The thermoplastic resin located at the surface of the thermoplastic resin is peeled off, and the thermoplastic resin having the same thickness as the peeled thermoplastic resin and the final transparent film are covered, and heated and pressurized to obtain a similar configuration. .
- thermoplastic resin not only the thermoplastic resin but also a thermosetting resin can be used.
- the first insulating film and the second insulating film sandwiching the light emitting element are translucent, and light can be emitted from both the upper and lower surfaces of the light emitting unit.
- one side can be opaque or reflective.
- the insulating film itself may have such a function, but an opaque or reflective material film may be applied to one side of the light emitting unit made of the transparent film LED described above.
- Japanese Patent Application No. 2013-249453 Japanese Patent Application No. 2013-249454, Japanese Patent Application No. 2013-249456, Japanese Patent Application No. 2013-249457. based on.
- the light emitting unit and the light emitting device of the present invention are suitable for a display device and a display lamp.
- the light emitting unit manufacturing method of the present invention is suitable for manufacturing a light emitting unit.
- Light emitting unit 20 Light emitting panel 21, 22 Transparent film 21a Insulation band 23 Conductor layer 23a-23i, 23m, 23x, 23y, 25, 26A, 26B Conductor pattern 24 Resin layer 25a Small piece 30 Light emitting element 31 Base substrate 32 N-type semiconductor layer 33 active layer 34 P-type semiconductor layer 35 pad 36 pad 37 bump 38 bump 39 metal piece 40 flexible cable 41 base material 42 coverlay 42a opening 43 conductor layer 43a, 43b conductor pattern 50 connector 50a terminal 60 reinforcing plate 70 driving device 80 Control device 91, 92 Conductive foreign matter 100 Light emitting device 200 DC power supply 240 Thermoplastic resin MP1 to MP15 Conductor pattern Connection P Pad
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Abstract
Description
以下、本発明の第1の実施形態を、図面を用いて説明する。説明には、相互に直交するX軸、Y軸、Z軸からなるXYZ座標系を用いる。
導体パターン23a,23bを構成する薄膜導体のピッチd2の2倍以下であり、この例では、ピッチd2と同等である。
次に、本発明の第2の実施形態について、図面を参照して説明する。第1の実施形態と同一又は同等の構成については、同等の符号を用いるとともに、その説明を省略又は簡略する。本実施形態に係る発光ユニット10は、発光パネル20を構成する発光素子30が、両面に電極を有している点で相違している。
以下、本発明の第3の実施形態を、図面を用いて説明する。上記各実施形態と同一又は同等の構成については、同等の符号を用いるとともに、その説明を省略又は簡略する。
次に、本発明の第4の実施形態について、図面を参照して説明する。上記各実施形態と同一又は同等の構成については、同等の符号を用いるとともに、その説明を省略又は簡略する。本実施形態に係る発光ユニット10は、導体パターンがメッシュパターンではなく、略透明な導体からなる点で、上記第2の実施形態に係る発光ユニットと相違している。
20 発光パネル
21,22 透明フィルム
21a 絶縁帯
23 導体層
23a~23i,23m,23x,23y,25,26A,26B 導体パターン
24 樹脂層
25a 小片
30 発光素子
31 ベース基板
32 N型半導体層
33 活性層
34 P型半導体層
35 パッド
36 パッド
37 バンプ
38 バンプ
39 金属片
40 フレキシブルケーブル
41 基材
42 カバーレイ
42a 開口部
43 導体層
43a,43b 導体パターン
50 コネクタ
50a 端子
60 補強板
70 駆動装置
80 制御装置
91,92 導電性異物
100 発光装置
200 直流電源
240 熱可塑性樹脂
MP1~MP15 導体パターン
接続P パッド
Claims (29)
- 光透過性を有する第1絶縁体と、
前記第1絶縁体に対向して配置される第2絶縁体と、
前記第1絶縁体と前記第2絶縁体のうちの少なくとも一方の表面に形成された光に対して透過性を有する複数の導体パターンと、
電極上にバンプを有し、前記複数の導体パターンのうちのいずれか2つの導体パターンに接続される複数の第1発光素子と、
前記第1絶縁体と前記第2絶縁体の間に配置され、前記第1発光素子を保持する樹脂層と、
を有する発光ユニット。 - 前記導体パターンは、開口部が光を透過するメッシュパターン、又は光透過性を有する導電性膜である請求項1に記載の発光ユニット。
- 光透過性を有する第1絶縁フィルムと、
前記第1絶縁フィルムに対向して配置される第2絶縁フィルムと、
前記第1絶縁フィルムと前記第2絶縁フィルムのうちの少なくとも一方の表面に形成される複数のメッシュパターンと、
前記複数のメッシュパターンのうちのいずれか2つのメッシュパターンに接続される複数の第1発光素子と、
前記第1絶縁フィルムと前記第2絶縁フィルムの間に配置され、前記第1発光素子を保持する樹脂層と、
を有する発光ユニット。 - 前記第1発光素子は、前記第1絶縁フィルムと前記第2絶縁フィルムのうちの一方の表面に形成される第1メッシュパターンに陽極が接続され、第2メッシュパターンに陰極が接続される請求項3に記載の発光ユニット。
- 前記第1発光素子は、前記第1絶縁フィルムの表面に形成される第1メッシュパターンに陽極が接続され、前記第2絶縁フィルムの表面に形成される第2メッシュパターンに陰極が接続される請求項3に記載の発光ユニット。
- 前記第1メッシュパターンと前記第2メッシュパターンの間には、2つ以上の前記第1発光素子が接続される請求項4又は5に記載の発光ユニット。
- 前記絶縁フィルムには3つ以上の前記メッシュパターンが形成され、前記第1発光素子は、直列に接続されている請求項3乃至6のいずれか一項に記載の発光ユニット。
- 前記メッシュパターンが接続パッドを有する請求項3乃至7のいずれか一項に記載の発光ユニット。
- 前記第1メッシュパターンと前記第2メッシュパターンの間に配置され、陰極が前記第1メッシュパターンに接続され、陽極が前記第2メッシュパターンに接続される、前記第1発光素子とは異なる第2発光素子を有する請求項4乃至6のいずれか一項に記載の発光ユニット。
- 前記第1発光素子と前記第2発光素子は、相互に異なるスペクトルの光を射出する請求項9に記載の発光ユニット。
- 前記メッシュパターンは、透過率が75%以上となるように線幅と配列ピッチが規定され、抵抗が100Ω以下であることを特徴とする請求項3乃至10のいずれか一項に記載の発光ユニット。
- 光透過性を有する第1絶縁フィルムと、
前記第1絶縁フィルムに対向して配置される第2絶縁フィルムと、
光透過性を有する導電性膜からなり、前記第1絶縁フィルムと前記第2絶縁フィルムのうちの少なくとも一方の表面に形成される複数の平面導体パターンと、
前記複数の平面導体パターンのうちのいずれか2つの平面導体パターンに接続される複数の第1発光素子と、
前記第1絶縁フィルムと前記第2絶縁フィルムの間に配置され、前記第1発光素子を保持する樹脂層と、
を有し、
前記平面導体パターンは、前記第1絶縁フィルムと前記第2絶縁フィルムのうちの少なくとも一方の表面に形成された前記導電性膜を区分することにより形成される発光ユニット。 - 前記第1発光素子は、前記第1絶縁フィルムと前記第2絶縁フィルムのうちの一方の表面に形成される第1平面導体パターンに陽極が接続され、第2平面導体パターンに陰極が接続される請求項12に記載の発光ユニット。
- 前記第1発光素子は、前記第1絶縁フィルムの表面に形成される第1平面導体パターンに陽極が接続され、前記第2絶縁フィルムの表面に形成される第2平面導体パターンに陰極が接続される請求項12に記載の発光ユニット。
- 前記第1平面導体パターンと前記第2平面導体パターンの間には、2つ以上の前記第1発光素子が接続される請求項13又は14に記載の発光ユニット。
- 前記絶縁フィルムには3つ以上の前記平面導体パターンが形成され、前記第1発光素子は、直列に接続されている請求項12乃至15のいずれか一項に記載の発光ユニット。
- 前記第1平面導体パターンと前記第2平面導体パターンの間に配置され、陰極が前記第1平面導体パターンに接続され、陽極が前記第2平面導体パターンに接続される、前記第1発光素子とは異なる第2発光素子を有する請求項13乃至16のいずれか一項に記載の発光ユニット。
- 前記第1発光素子と前記第2発光素子は、相互に異なるスペクトルの光を射出する請求項17に記載の発光ユニット。
- 前記平面導体パターンはITO膜である請求項12乃至18のいずれか一項に記載の発光ユニット。
- 前記複数の導体パターンは、L字状の折り返し部分を有する導体パターンを含む請求項1又は2に記載の発光ユニット。
- 前記導体パターンの周囲に、前記導体パターンの配列ピッチ以下の長さに切断された、細分化された導体パターンを有する請求項1、2及び20のいずれか一項に記載の発光ユニット。
- 前記導体パターンは、前記絶縁体の表面に形成された導体膜を、レーザを用いてパターニングすることにより形成される請求項1、2、20及び21のいずれか一項に記載の発光ユニット。
- 前記発光素子は、一方の面に陽極と陰極を有するLEDチップである請求項1乃至4のいずれか一項に記載の発光ユニット。
- 前記発光素子の陽極及び陰極には、前記一方の面から突出するバンプが形成されている請求項23に記載の発光ユニット。
- スリットで区分された前記導体パターンが、前記絶縁体の表面を覆っている請求項1、2、20乃至24のいずれか一項に記載の発光ユニット。
- 請求項1乃至25のいずれか一項に記載の発光ユニットと、
前記発光素子に電力を供給する電源と、
を備える発光装置。 - 前記発光ユニットを所定のプログラムに従って制御する制御装置を備える請求項26に記載の発光装置。
- 光透過性を有する絶縁フィルムの一方の面に、複数のメッシュパターンを形成する工程と、
前記複数のメッシュパターンのうちの第1メッシュパターンと第2メッシュパターンの間に発光素子を配置して、前記発光素子の陽極を前記第1メッシュパターンに接続し、前記発光素子の陰極を前記第2メッシュパターンに接続する工程と、
を含む発光ユニットの製造方法。 - 光透過性を有する絶縁フィルムに、光透過性を有する導電性膜を形成する工程と、
前記導電性膜をパターニングして、前記絶縁フィルムに、複数の平面導体パターンを形成する工程と、
前記複数の平面導体パターンのうちの第1平面導体パターンと第2平面導体パターンの間に発光素子を配置して、前記発光素子の陽極を前記第1平面導体パターンに接続し、前記発光素子の陰極を前記第2平面導体パターンに接続する工程と、
を含む発光ユニットの製造方法。
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US20200136000A1 (en) | 2020-04-30 |
JP6774527B2 (ja) | 2020-10-28 |
JP6523179B2 (ja) | 2019-05-29 |
CN105518886A (zh) | 2016-04-20 |
JPWO2015083366A1 (ja) | 2017-03-16 |
US10553769B2 (en) | 2020-02-04 |
US20160276322A1 (en) | 2016-09-22 |
JP2019134184A (ja) | 2019-08-08 |
EP3079176A1 (en) | 2016-10-12 |
US11538972B2 (en) | 2022-12-27 |
EP3079176B1 (en) | 2020-06-17 |
EP3079176A4 (en) | 2016-12-28 |
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