JP4588474B2 - Illumination device and method for mounting illumination light source - Google Patents

Description

  The present invention relates to an illuminating device in which an illuminating light source is mounted on a flexible printed circuit board, and an illuminating device mounting method, and more particularly to a surface in which a plurality of light emitting elements are arranged along a predetermined curved surface. The present invention relates to a method for mounting an illumination light source suitable for a light emitting illumination device.

As a light emitter device in which a large number of light sources are arranged on the surface of a holding body, for example, a light source connection having a structure in which anodes and cathodes of LEDs are connected to each other by a flat connection conductor extending in the arrangement direction of a plurality of LEDs that are light sources The body is known (Patent Document 1). The connection conductor in this light source assembly is formed by cutting out a required portion of a substantially flat patterned conductor on which a predetermined pattern is formed by pressing. According to this light source assembly, by imparting appropriate flexibility to the connection conductor, the light source assembly can be appropriately transformed into a required shape, and various arrangements of light sources can be easily dealt with. it can.
WO02 / 089222A1, page 3, lines 7-22, FIG.

  However, in the conventional light source assembly described above, each terminal of the LED, which is a light source, is connected by a connecting conductor formed by pressing a flat patterned conductor. There is a problem that the number of steps for forming the connection conductor and the connection of the LED and the number of steps for connecting the connection conductor and the printed wiring board are required, resulting in an increase in manufacturing cost. In addition, there is a problem that it is difficult to reduce the thickness due to the structure.

  This invention is made in view of such a point, and provides the mounting method of the illuminating device which can achieve thickness reduction by reduction of manufacturing cost and ensuring of the arrangement | positioning freedom degree of a light source, and the light source for illumination. Objective.

A first lighting device according to the present invention includes a flexible printed wiring board in which a part is formed so as to form a tongue piece portion, and a tip of the tongue piece portion of the flexible printed wiring board. comprising a light emitting element for mounting light sources, and a support member for supporting the parts of the other than the tongue portion of the front asked FLEXIBLE printed circuit board, and a lens curved surface is formed, the tongue portion Are provided with a plurality of adjacent ones with their tips opposite to each other, and the tips of the tongue pieces mounted with the light emitting elements are mounted on a support extending from the support member, or directly on the back surface of the lens. By being joined, it is displaced from a portion other than the tongue piece portion of the flexible printed wiring board .

A second illumination device according to the present invention has a tip portion on which each light emitting element is mounted in an illumination device in which a plurality of light emitting elements are arranged on one or a plurality of planes to form a surface light source. a flexible printed circuit board to which they tip having a plurality of tongue portions which are formed by cuts such that the staggered and opposite, before hear fLEXIBLE printed parts of the other than the tongue portion of the wiring substrate And a lens having a curved surface formed on the surface thereof, and the tip of the tongue piece portion on which the light emitting element is mounted is placed on a support extending from the support member, or the back surface of the lens By being directly joined to the flexible printed wiring board, the flexible printed wiring board is displaced from a portion other than the tongue piece portion .

According to the lighting light source mounting method of the present invention, a plurality of tongue pieces are formed in which a notch is formed in a flexible printed wiring board so that adjacent ones have their tips opposite to each other. A light emitting element is mounted as a light source on the tip of the tongue piece of the wiring board, and the tip of the tongue piece of the flexible printed wiring board is connected to a portion other than the tongue piece of the flexible printed wiring board. The flexible printed wiring board is displaced from a portion other than the tongue piece portion by being placed on a support extending from a supporting member to be supported or directly bonded to the rear surface of the lens, and the flexible The printed circuit board is supported.

  In one Embodiment of this invention, the said tongue piece part is provided with two or more things by mutually adjoining tips, for example. In another embodiment of the present invention, the lens further includes a lens having a curved surface formed on the front surface and a step formed along the curved surface on the back surface, and the light emitting element is adapted to the step on the back surface of the lens. It is displaced from the flexible printed circuit board and is supported by the support member.

  According to the present invention, a light emitting element as a light source is mounted on the tip of a tongue piece formed by cutting a flexible printed wiring board, and the tip of the tongue piece is displaced from a portion other than the tongue piece. As a result, the connection process between the light emitting element and the printed wiring board can be simplified, the manufacturing cost can be reduced, and the degree of freedom in arranging the light emitting element is ensured. This makes it possible to reduce the thickness of the entire apparatus.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 3 are diagrams for explaining an illumination device according to an embodiment of the present invention. FIG. 1 is a plan view of a printed circuit, FIG. 2 is a perspective view of the circuit, and FIG. It is sectional drawing.

  The printed mounting circuit 2 incorporated in the lighting device 1 is made of a flexible film such as PET in which a plurality of tongue pieces 4 are formed by slits 3 having a zigzag pattern so that the tip portions are alternately reversed. The printed wiring board 5 and the LED 6 serving as a light source mounted on the tip of each tongue piece 4 of the printed wiring board 5 are configured. The LED 6 is supplied with electric power necessary for illumination via a wiring pattern 7 formed along the slit 3 on the printed wiring board 5.

  A portion 8 other than the tongue piece portion 4 of the printed wiring board 5 is attached to a base plate 9 serving as a support member of the lighting device 1. A lid body 11 that fits into the lid body mounting hole 10 is attached to the base plate 9, and an accommodation space 12 for the printed mounting circuit 2 is formed in a space between the lid body 11. A lens 13 is fitted in the center of the lid 11. The printed mounting circuit 2 is housed in the housing space 12 of the lighting device 1 in a state where the tip of each tongue piece 4 is displaced from the portion 8 other than the tongue piece. The distal end portion of the tongue piece portion 4 may be disposed so as to be directly joined to the lens 13 or may be disposed in a state of being placed on a support body 14 extending from the base plate 9 as illustrated. .

  A large number of LEDs need to be used when used as an illumination light source because they have lower luminance than a light bulb. Moreover, in order to ensure the required illuminance of the illumination part with respect to the strong directivity of LED light, it is necessary to angle the LED mounting surface. With respect to these requirements, according to the lighting device according to the present embodiment configured as described above, the height of the installation surface and the mounting angle can be changed for each LED by alternately forming the plurality of tongue pieces 4. Can do.

  FIG. 4 is a plan view showing a printed mounting circuit 20 used in the lighting apparatus according to the second embodiment of the present invention. In this embodiment, holes 22 are formed at corners and ends of the slit 3 of the printed wiring board 21. These holes 22 can prevent breakage or crack development in the slit 3 of the printed wiring board 21 itself. In addition, by forming the slit 3 itself in a curved line instead of the hole 21, it is possible to prevent breakage and crack development at the same slit portion.

  5 and 6 are diagrams showing an illumination device 30 according to the third embodiment of the present invention. FIG. 5 is a plan view of the printed mounting circuit 31, and FIG. 6 is a partial cross-sectional view of the illumination device 30.

  In this embodiment, the printed wiring board 32 includes 3 × 3 rows (= 9 in total) of tongue pieces 4 formed by three slits 3a, 3b, 3c in a zigzag pattern, and these tongue pieces 4 It is comprised by LED6 mounted in each front-end | tip. Further, a step 34 along the curved surface is formed on the back surface of the lens 33 having a curved surface, and the LED 6 has a tongue piece portion 4 in accordance with the step 34 on the back surface of the lens 33. It is displaced and supported from the part 8 other than the tongue piece part 4 of 32. A portion 8 other than the tongue piece portion 4 of the printed wiring board 32 is attached to the base plate 35 along the curved surface of the lens 33.

  7 and 8 are diagrams showing an illumination device 40 according to the fourth embodiment of the present invention. FIG. 7 is a plan view of the printed mounting circuit 41, and FIG. 8 is a partial cross-sectional view of the illumination device 40. FIG.

  In this embodiment, the printed wiring board 42 has seven tongue pieces 4 having different lengths formed by the slits 3d having a zigzag pattern whose amplitude changes in the middle, and at each tip of the tongue pieces 4 It is comprised by LED6 mounted. Further, a step 44 along the curved surface is formed on the back surface of the lens 43 having a curved surface, and the LED 6 has a tongue piece portion 4 in accordance with the step 44 on the back surface of the lens 43. It is displaced and supported from the part 8 other than the tongue piece part 4 of 42. A portion 8 other than the tongue piece portion 4 of the printed wiring board 42 is attached to a base plate 45 along the curved surface of the lens 43.

  As described above, the LED can be arranged at an arbitrary height according to the arrangement state by being displaced from the base portion of the printed wiring board via the tongue piece.

  The present invention can be applied to various lighting equipment for automobiles such as a tail lamp, a head lamp, a license lamp, a fog lamp, and a rear fog lamp of an automobile. In this case, according to the present invention, it is possible to reduce the thickness of the lighting device using LEDs and improve the degree of freedom of curved surface arrangement.

  In the above embodiment, one LED is disposed on one tongue piece, but a plurality of light emitting elements may be disposed on one tongue piece.

It is a top view of the printed mounting circuit of the illuminating device which concerns on the 1st Embodiment of this invention. It is a perspective view of the same printed mounting circuit. It is sectional drawing of the illumination device. It is a top view of the printed mounting circuit in the illuminating device which concerns on the 2nd Embodiment of this invention. It is a top view of the printed mounting circuit in the illuminating device which concerns on the 3rd Embodiment of this invention. It is sectional drawing of the illumination device. It is a top view of the printed mounting circuit in the illuminating device which concerns on the 4th Embodiment of this invention. It is sectional drawing of the illumination device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,30,40 ... Illuminating device, 2, 20, 31, 41 ... Print mounting circuit, 3, 3a-3d ... Slit, 4 ... Tongue piece part, 5, 21, 32, 42 ... Printed wiring board, 6 ... LED , 13, 33, 43 ... lens, 34, 44 ... step.

Claims (7)

A flexible printed wiring board in which a cut is formed so that a part forms a tongue piece,
A light-emitting element for a light source mounted at the tip of the tongue piece of the flexible printed wiring board;
A support member for supporting the parts of the other than the tongue portion of the front asked FLEXIBLE printed circuit board,
A lens with a curved surface formed on the surface ,
A plurality of adjacent tongue pieces are provided with their tips opposite to each other,
The tip of the tongue piece portion on which the light emitting element is mounted is placed on a support extending from the support member, or directly joined to the back surface of the lens, so that the tongue piece of the flexible printed circuit board is provided. An illuminating device that is displaced from a portion other than the portion . The lens is formed with a step along the curved surface on the back surface ,
The light emitting device, the illumination apparatus according to claim 1, characterized in that it is supported by the supporting member is displaced from the flexible printed wiring board in accordance with the rear surface of the step of the lens. The support member has a shape curved along the curved surface of the surface of the lens,
The lighting device according to claim 1, wherein a portion other than the tongue piece portion of the flexible printed wiring board is attached to the support member. In an illumination device in which a plurality of light emitting elements are arranged on one or a plurality of planes to form a surface emitting light source,
A flexible printed wiring board having a plurality of tongue pieces formed by cutting so that each of the light emitting elements is mounted so that the tips are alternately opposite to each other;
A support member for supporting the parts of the other than the tongue portion of the front asked FLEXIBLE printed circuit board,
A lens with a curved surface formed on the surface ,
The tip of the tongue piece portion on which the light emitting element is mounted is placed on a support extending from the support member, or directly joined to the back surface of the lens, so that the tongue piece of the flexible printed circuit board is provided. An illuminating device that is displaced from a portion other than the portion . Forming a plurality of tongue pieces with the tips opposite to each other by forming a cut in the flexible printed wiring board,
A light emitting element is mounted as a light source at the tip of the tongue piece of the flexible printed wiring board,
The tip of the tongue piece portion of the flexible printed circuit board is placed on a support member that extends from a support member that supports a portion other than the tongue piece portion of the flexible printed circuit board, or on the back surface of the lens. A light source for illumination, wherein the flexible printed wiring board is displaced from a portion other than the tongue piece portion of the flexible printed wiring board by directly joining, and the flexible printed wiring board is supported by a support member. Implementation method. The light emitting element is supported on the support member by being displaced from the flexible printed circuit board in accordance with the step on the back surface of the lens having a curved surface formed on the front surface and a step formed along the curved surface on the back surface. The illumination light source mounting method according to claim 5 , wherein the illumination light source is mounted. A portion other than the tongue piece portion of the flexible printed wiring board is attached to a support member having a shape curved along the curved surface of the lens surface to support the flexible printed wiring board. The mounting method of the light source for illumination of Claim 5 or 6 characterized by the above-mentioned.

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