JP2014112561A - Illumination method of led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination method of an LED lamp which can be used while being mounted to a socket mounting a conventional lamp such as an incandescent lamp or a ball-type fluorescent lamp and is capable of performing illumination with low power consumption and high illuminance.SOLUTION: In an LED lamp 1, three wiring boards 7 are mounted in a lamp base 2 in a triangular tube shape, one box-shaped LED package having a property of 180° light distribution for emitting light from a direction of a central axis of a light-emitting surface to a direction of 90° with respect to the central axis of the light-emitting surface is mounted on each of printed wires on the three wiring boards 7, and a light-transmissive lamp ball 3 is mounted so as to cover the three wiring boards 7 as a whole. An illumination method of the LED lamp is characterized in that the box-shaped LED package on each of the wiring boards 7 are simultaneously emitted to perform illumination in all the directions at 360° around the triangular tube shape.

Description

  The present invention relates to an illumination method for an LED lamp.

  Conventionally, for example, a light bulb or a fluorescent lamp is used as a light source for a vehicle display lamp that is attached to the roof of a vehicle such as a taxi and displays a company name or advertising characters. The display cover body is illuminated from the inside, and the company name and advertising characters displayed on the display cover body are lifted and displayed like a shadow. However, in the case of a light bulb or a fluorescent lamp, the problem is that the power consumption is large and the lifetime is short.

  In recent years, white LEDs have attracted attention as light sources that replace light bulbs and fluorescent lamps. As a technique using a white LED as a light source for a vehicle display lamp, a technique described in Japanese Patent Application Laid-Open No. 2006-4786 (Patent Document 1) and a technique described in Japanese Patent Application Laid-Open No. 2006-260969 (Patent Document 2) are described. Things are known.

  The technology described in Patent Document 1 arranges a light guide plate on the back of a display cover body that displays a company name, advertising characters, etc., arranges an LED on the side of the light guide plate, guides the light of the LED to the light guide plate, The entire surface of the display cover body is illuminated from the back side. The technique described in Patent Document 1 does not use an LED lamp mounted on a socket in which a conventional bulb or fluorescent lamp is mounted.

  The technique described in Patent Document 2 mounts a three-color LED on an LED-dedicated substrate, arranges it in the display cover body, illuminates the display cover body from the inside by the light emission, and displays it on the display cover body. It is a structure that shows the company name and advertising characters that are raised like a silhouette. The technique described in Patent Document 2 is not used by mounting an LED lamp on a socket in which a conventional bulb or fluorescent lamp is mounted.

  The applicant of the present application can be used by being mounted on a socket in which a lamp such as a conventional incandescent bulb or a ball-type fluorescent lamp is mounted as an invention for solving the above-described problems of the prior art. Similarly, Japanese Patent Application No. 2009-75994 discloses a one-lamp type LED lamp that can illuminate the display cover body from the inside and show the company name and advertising characters displayed on the display cover body as if they were shadows. I have proposed.

JP 2006-4786 A JP 2006-260969 A

  The present invention relates to the improvement of the LED lamp illumination method proposed by the applicant of the present invention, and can be used by being mounted on a socket in which a lamp such as a conventional incandescent bulb or a ball-type fluorescent lamp is mounted, The light emission can illuminate the display cover body from the inside as before, and the company name and advertising characters displayed on the display cover body can be lifted up like a shadow, and can be illuminated with high power and low power consumption. An object of the present invention is to provide an illumination method for an LED lamp.

  Another object of the present invention is to provide an illumination method for an LED lamp that can be fronted with uniform brightness in all directions of 360 degrees using a plurality of LED packages.

  A feature of the present invention is an LED illumination method of an LED lamp that is used as a light source lamp of a vehicle display lamp that is attached to a vehicle and displays characters, etc., and includes three wiring boards in a triangular tube shape on a lamp base And a light distribution characteristic of 180 degrees that emits light from the direction of the central axis of the light emitting surface to the direction of 90 degrees with respect to the central axis of the light emitting surface on each printed wiring on the three wiring boards. In an LED lamp mounted with one provided box-type LED package and mounted with a translucent lamp ball so as to cover the entire three wiring boards, the box-type LED on each of the one wiring board An illumination method for an LED lamp, wherein a package is caused to emit light simultaneously to illuminate 360 degrees around the triangular cylinder.

  According to the LED illumination method of the present invention, since the box-shaped LED package on each wiring board can emit light at the same time, it can be illuminated in all directions at 360 degrees around the triangular tube shape. It can be used by attaching it to a socket equipped with a lamp such as a light bulb or a ball-type fluorescent lamp. It is possible to provide an illumination method for an LED lamp that can display advertisement characters as if they are raised like a shadow picture and can illuminate with high illuminance with low power consumption.

The top view of the LED lamp of the 1st Embodiment of this invention. The front view which fractured | ruptured partially the LED lamp of the said embodiment. The expanded view of the three wiring boards inserted in the LED lamp of the said embodiment. A box-shaped LED element used as a light source in the LED lamp of the embodiment. The circuit diagram of the LED lamp of the said embodiment. Explanatory drawing of the light distribution characteristic of the LED lamp of the said embodiment. The perspective view of the LED unit mounted in the LED lamp of the 2nd Embodiment of this invention. The top view of the LED lamp of the 3rd Embodiment of this invention. The front view which fractured | ruptured partially the LED lamp of the said embodiment. The expanded view of the three wiring boards inserted in the LED lamp of the said embodiment. The circuit diagram of the LED lamp of the said embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  [First Embodiment] The LED lamp 1 according to the first embodiment of the present invention shown in FIGS. 1 and 2 is mounted on the roof of a vehicle such as a taxi and displays a company name, advertising characters, and the like. It is used as a light source lamp of a display lamp for use, and includes a bottomed cylindrical base 2 and a transparent or translucent lamp ball 3 attached to the upper opening of the base 2. An LED unit 4 is installed in the base 2 and the lamp ball 3. The specification of the base 2 is the same size as the base of the conventional lamp and the lamp ball because it is used by replacing the incandescent lamp and the ball-type fluorescent lamp that have been used conventionally. For example, the outer diameter is 18 mm and the total lamp length is 35 mm.

  A resin ring 5 is inserted and fixed to the inner bottom portion of the base 2. This resin ring 5 supports and fixes the lower part of a triangular pillar-shaped column 6 made of a ceramic insulating material. A wiring board 7 made of a ceramic insulating material is bonded to each of the three side surfaces of the support 6.

  As shown in the developed state of the three wiring boards 7 in FIG. 3, printed wiring 8 is formed on each of the wiring boards 7. The printed wiring 8 has a first electrode lead 9 having an anode connection arm 9a and a second electrode lead 10 having a cathode connection arm 10a. The first electrode lead 9 is formed with resistance connection lands 9b and 9c. Further, connection end lands 9d and 10b are formed at the lower ends of the first electrode lead 9 and the second electrode lead 10, respectively.

  Further, the three wiring boards 7 are unfolded as shown in FIG. 3, and the connection end land 9d of the first electrode lead 9 on the wiring board 7 (1) at the left end position and the wiring board 7 (2 at the middle position). ) The connecting wire 11 is connected between the connection end land 10b of the second electrode lead 10 and the printed wirings 8 and 8 are connected in series. Similarly, the connection end land 9d of the first electrode lead 9 on the wiring board 7 (2) at the middle position and the connection end land 10b of the second electrode lead 10 on the wiring board 7 (3) at the right end position are connected. They are also connected by a crossover 12. The connection end land 10 b of the second electrode lead 10 of the wiring board 7 (1) at the left end position is connected to the negative terminal 21 made of solder of the base 2 by a lead wire 22. Further, the connection end land 9d of the first electrode lead 9 of the wiring board 7 (3) at the right end position is connected to the plus terminal 23 made of solder formed on the body portion of the base 2 by the lead wire 24. Yes. At the same time, a Zener diode 25 is connected between the minus terminal 21 and the plus terminal 23 in order to keep the voltage between both terminals constant.

  In the printed wiring 8 on each wiring board 7, the anode electrode 101 of the box-shaped LED element LED is connected to the tip of the anode connection arm 9a, and the cathode electrode 102 of the LED element LED is connected to the tip of the cathode connection arm 10a. Has been. Hereinafter, when it is necessary to distinguish the LED elements LED, the LED 1 is mounted on the wiring board 7 (1) at the leftmost position in FIG. 3 and is mounted on the wiring board 7 (2) at the intermediate position. The one mounted on the wiring board 7 (3) at the right end position is identified as LED3.

  As shown in FIG. 4, each LED element LED has a box shape in which a light emitting unit 111 and a fluorescent light emitting unit 112 are laminated. The anode electrode 101 and the cathode electrode 102 are formed on one main surface of the light-emitting portion 111 of each LED element LED, and the fluorescent light has a configuration in which a phosphor is mixed into a resin on the other main surface or a phosphor is applied to glass. A light emitting unit 112 is disposed. For example, a blue light emitter that outputs blue light having a wavelength of about 470 nm is used for the light emitting portion 111, and a yellow phosphor such as yttrium, aluminum, garnet (YAG) is used for the fluorescent light emitting portion 112. When a predetermined voltage is applied between the anode electrode 101 and the cathode electrode 102, blue light is output from the light emitting unit 111. This blue light is incident on the fluorescent light emitting unit 112 of yellow phosphor, and is emitted as white light to the eye by the color mixture of the blue light transmitted through the fluorescent light emitting unit 112 and the yellow fluorescent light of the fluorescent light emitting unit 112.

  A box-shaped resistor R is connected between the resistance connection lands 9b and 9c formed on the first electrode lead 9 in the printed wiring 8 on each wiring board 7.

  Inside the base 2, a Zener diode 25 connected between the minus terminal 21 and the plus terminal 23 keeps the voltage between the terminals 21 and 23 constant, and the three series LEDs 1, LED 2 and LED 3 are connected to each other. It works to prevent overvoltage from being applied.

  As described above, as shown in FIG. 5, the printed wiring 8 formed on each of the three wiring boards 7 (1) to 7 (3) is between the negative terminal 21 and the positive terminal 23 at both ends as a whole. The circuit configuration is connected in three stages in series. The three LED elements LED1 to LED3 and the resistors R1 to R3 are connected in series in three stages, and a Zener diode 25 is connected in antiparallel to the three-stage series connection configuration.

  The LED lamp 1 having the above configuration is used in place of an incandescent lamp and a ball-type fluorescent lamp that have been used conventionally. The base 2 is screwed in and used. When this LED lamp 1 is turned on, each of the three LED elements LED1 to LED3 emits white light and emits light in three directions separated by 120 °. In this LED lamp 1, a box-shaped LED package as shown in FIG. 4 is used for each of the LED elements LED1 to LED3. Therefore, as apparent from the light emission characteristics shown in FIG. Each of the LEDs 3 emits light 31 to 33 in a direction of approximately 180 °, and the light 31 to 33 in three directions is synthesized by a rectangular light source on the wiring board 7, so that the lamp as a whole is approximately 360 ° over the entire circumference. Uniformly bright light 30 can be emitted.

  According to the experimental example, the lighting characteristics were as follows. When a conventional incandescent bulb was used as a light source for a vehicle display lamp, the voltage was 13.0 V, the current was 180 mA, the power was 10 W, the luminous flux was 120 Lm, and the efficiency was 12 Lm / W. On the other hand, in the case of the LED lamp of the embodiment of the present invention, the outer diameter, the overall length are the same size, and the base has the same specification, but the voltage is 13.5 V, the current is 120 mA, and the power is 1.6 W. The luminous flux was 90 Lm and the efficiency was 55 Lm / W. Further, the lamp life is about 600 hours in the conventional incandescent bulb, whereas in the embodiment of the present invention, it is 10000 hours or more of the LED life, and the lamp life is improved about 20 times compared with the conventional one. . Further, in the case of a vehicle indicator lamp using a conventional incandescent lamp as a light source, the letters that float up look slightly yellowish, but in the case of a vehicle indicator lamp that uses the LED lamp 1 of the embodiment of the present invention as a light source, Was white, and it was confirmed that it could be illuminated so that it was clearly lifted.

  [Second Embodiment] FIG. 7 shows an LED unit 4A used in an LED lamp 1 according to a second embodiment of the present invention. In the case of the LED lamp 1 of the present embodiment, the configuration common to the LED lamp 1 of the first embodiment shown in FIGS. 1 to 6 is adopted except that the LED unit 4A having the configuration shown in FIG. 7 is adopted. Have.

  A feature of the present embodiment is that, with respect to the LED unit 4A, a wedge-shaped base 61 having a lower upper side and a lower upper side is attached to each of the three side surfaces of the triangular pillar-shaped column 6, and the wiring board 7 is attached to the inclined surface of the wedge-shaped base 61. It is in the point which made the structure which adhered. By configuring the LED unit 4A in such a structure, each wiring board 7 facing three directions and the LED element LED mounted thereon have a normal line obliquely upward with respect to the vertical line, and the LED element LED emits light. Light is strongly emitted obliquely upward. Thereby, when the LED lamp 1 of this embodiment is attached to the vehicular indicator lamp, bright light is emitted at the height of the eyes of the person viewing the display, and the display effect can be enhanced.

  [Third Embodiment] An LED lamp 1 according to a third embodiment of the present invention will be described with reference to FIGS. Even in the present embodiment, the elements common to the LED lamp 1 of the first embodiment are denoted by the same reference numerals.

  Similar to the first embodiment, the LED lamp 1 of the present embodiment includes a bottomed cylindrical base 2 and a transparent or translucent lamp ball 3, and an LED unit is provided in the base 2 and the lamp ball 3. 4 is installed. A resin ring 5 is inserted and fixed to the inner bottom portion of the base 2. This resin ring 5 supports and fixes the lower part of a triangular pillar-shaped column 6 made of a ceramic insulating material. A ceramic insulating wiring board 7 (1) to 7 (3) is bonded to each of the three side surfaces of the column 6, and a triangular wiring substrate 7 (4) is bonded to the top surface of the column 6. .

  In the case of the present embodiment, printed wiring 8 is formed on each of the three wiring boards 7 (1) to 7 (3) as in the first embodiment, as shown in the development view of FIG. Yes. The printed wiring 8 has a first electrode lead 9 having an anode connection arm 9a and a second electrode lead 10 having a cathode connection arm 10a. The first electrode lead 9 is formed with resistance connection lands 9b and 9c. Further, connection end lands 9d and 10b are formed at the lower ends of the first electrode lead 9 and the second electrode lead 10, respectively. An anode connection arm 9a 'and a cathode connection arm 10a' are formed on the triangular wiring board 7 (4).

  Furthermore, as a feature of the present embodiment, the three wiring boards 7 are unfolded as shown in FIG. 10, and the connection end land 9d of the first electrode lead 9 on the wiring board 7 (1) at the left end position and the ceiling are provided. A lead wire 10 'is connected to the cathode connection arm 10a' of the triangular wiring board (4) of the surface, and the second electrode lead 10 on the wiring board 7 (2) at the intermediate position is connected to the anode connection arm 9a '. The connection end land 10b is connected by a lead wire 9 '.

  Furthermore, the connection end land 9d of the first electrode lead 9 on the wiring board 7 (2) at the middle position and the connection end land 10b of the second electrode lead 10 on the wiring board 7 (3) at the right end position. They are connected by a crossover 12. The connection end land 10 b of the second electrode lead 10 of the wiring board 7 (1) at the left end position is connected to the negative terminal 21 made of solder of the base 2 by a lead wire 22. Further, the connection end land 9d of the first electrode lead 9 of the wiring board 7 (3) at the right end position is connected to the plus terminal 23 made of solder formed on the body portion of the base 2 by the lead wire 24. Yes. At the same time, a Zener diode 25 is connected between the minus terminal 21 and the plus terminal 23 in order to keep the voltage between both terminals constant.

  In the printed wiring 8 on each of the wiring boards 7 (1) to 7 (3), the anode electrode 101 of the box-shaped LED element LED is connected to the tip of the anode connection arm 9a, and the cathode electrode 102 of the LED element LED is It is connected to the tip of the cathode connection arm 10a. Similarly, in the triangular top wiring board 7 (4), the anode electrode 101 of the box-shaped LED element LED is connected to the tip of the anode connection arm 9a ′, and the cathode electrode 102 of the LED element LED is the cathode. It is connected to the tip of the connection arm 10a ′. Hereinafter, when it is necessary to distinguish the LED elements LED, the LED 1 mounted on the wiring board 7 (1) at the leftmost position in FIG. 10 is mounted on the wiring board 7 (2) at the intermediate position. The LED 2 is identified as the LED, the LED 3 mounted on the wiring board 7 (3) at the right end position is identified as the LED 3, and the LED 4 is identified at the top position. In the present embodiment, the employed LEDs 1 to 4 are all the same as those in the first embodiment.

  As described above, as shown in FIG. 11, the printed wiring 8 formed on the three wiring boards 7 (1) to 7 (3) and the lead wires 9 ′ reaching the triangular wiring board 7 (4), 10 'has a circuit configuration in which a negative terminal 21 and a positive terminal 23 at both ends are connected in series as a whole. The four LED elements LED1 to LED4 and the resistors R1 to R3 are connected in series, and a Zener diode 25 is connected in antiparallel to this series connection configuration.

  The LED lamp 1 having the above configuration is used by screwing the portion of the base 2 into a socket that is previously installed as a vehicle indicator lamp. When this LED lamp 1 is turned on, each of the three LED elements LED1 to LED3 emits white light, radiates light in three directions separated by 120 ° in the horizontal direction, and simultaneously the LED 4 on the top radiates light upward. To do. Since this LED lamp 1 uses a box-shaped LED package as shown in FIG. 4 for each of the LED elements LED1 to LED4 as in the first embodiment, it is clear from the light emission characteristics shown in FIG. Thus, each of the three LED elements LED1 to LED3 emits light 31 to 33 in a direction of approximately 180 °, and at the same time, the LED 4 on the top surface emits light in a direction of approximately 180 ° upward.

  As a result, in the LED lamp of the present embodiment, horizontal light 31 to 33 is synthesized with a rectangular light source on the wiring board 7, and the entire lamp is substantially uniform over the entire 360 ° circumference in the horizontal direction. Can emit bright light 30 and at the same time, the LED 4 can emit bright light upward. For this reason, in the case of the LED lamp 1 of the present embodiment, it is possible to save power, increase the efficiency and extend the life as in the first embodiment, and also can brightly illuminate the upper surface side as a vehicle indicator lamp. You can illuminate the letters so that they appear more clearly.

  Note that the LED lamp of the present invention can be widely used as a vehicular indicator lamp, and the emission color is not limited to completely white light emission. Depending on the application, the LED lamp can emit other colors. It is also possible to do.

DESCRIPTION OF SYMBOLS 1 LED lamp 2 Base 3 Lamp ball 4, 4A LED unit 6 Post 7 (1) -7 (4) Wiring board 8 Printed wiring 9 1st electrode lead 9 'Lead wire 9a, 9a' Anode connection arm 9b, 9c Resistance connection Land 9d Connection end land 10 Second electrode lead 10 'Lead wire 10a, 10a' Cathode connection arm 10b Connection end land 11 Crossover wire 12 Crossover wire 21 Negative terminal 22 Lead wire 23 Plus terminal 24 Lead wire 25 Zener diode LED LED element R Resistance 101 Anode electrode 102 Cathode electrode

Claims (1)

  An LED illumination method for an LED lamp that is used as a light source lamp of a vehicle indicator lamp that is attached to a vehicle and displays characters or the like, wherein three wiring boards are mounted in a triangular tube shape on a lamp base, and the 3 One box having a light distribution characteristic of 180 degrees that emits light from the direction of the central axis of the light emitting surface to the direction of 90 degrees with respect to the central axis of the light emitting surface on each printed wiring on one wiring board In a LED lamp mounted with a light-emitting lamp ball so as to cover the whole of the three wiring boards, the box-type LED package on each of the wiring boards is caused to emit light simultaneously. The illumination method of the LED lamp, wherein the illumination is performed in 360 degrees around the triangular cylinder.

Images