JP2011075329A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system capable of effectively loading mounting components within a limited space of a circuit substrate 1 without changing position dimensions of a light emitting element which depend on the design of instruments. <P>SOLUTION: The lighting system includes a circuit substrate with a wiring pattern, many light emitting elements D positioned and arranged on the wiring pattern and illuminating specific indices 46, accessories C, R of the light emitting elements D which are connected to the light emitting elements D and arranged on the wiring pattern, and many cylindrical bodies 32 which surround the light emitting elements D and the accessories C, R and are disposed between the circuit substrate 1 and the indices 46. The light emitting elements D are adjacently arranged at a periphery of the circuit substrate 1 through a part of the cylindrical bodies 32, and the accessories C, R are opposed adjacent to the light emitting elements D at the opposite site of the periphery. The longitudinal direction of the light emitting elements D and the longitudinal direction of the accessories C, R are along the extending direction of the periphery of the circuit substrate 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting device used in an instrument device mounted on a moving body such as an automobile, a motorcycle, an agricultural construction machine, a water bike, a snow bike, and a ship, and in particular, a light emitting element and a noise countermeasure on a circuit board. In a lighting device on which components are mounted, a circuit board is miniaturized.

  Conventionally, an illumination device described in Patent Document 1 is known. This is a lighting device of this type that is mounted on an automobile. A circuit board provided with a predetermined wiring pattern is equipped with a measuring instrument body and a light emitting element consisting of a stepping motor and a cross coil motor, and the front side of this circuit board. A case body is disposed in front of the case body, and a display panel is disposed in front of the case body, and a pointer driven by the instrument body is disposed in front of the display panel.

  On the display panel, in addition to a scale, number, and character indicator (also referred to as a display), the turn indicator, shift indicator, beam indicator, brake indicator, oil indicator, seat belt indicator, oil indicator The indicator part which consists of the figure for information which forms a part of various indicators, such as a battery indicator, or an alarm is formed.

  These indicator portions can be illuminated and displayed by turning on the light emitting elements mounted on the circuit board. Further, the case body is formed with a cylindrical body extending toward the circuit board so as to surround the light emitting element, and each indicator portion is illuminated through the cylindrical body.

  As the light-emitting element, a light-emitting element (hereinafter also referred to as an LED) composed of a light-emitting diode that is small and has a relatively small calorific value, particularly a light-emitting diode chip in the form of a surface-mounted device has been used. The light emitting diode is usually connected to a power source through a wiring pattern to a circuit element made up of a driving resistor that determines a current value for driving the light emitting diode.

  In addition, light-emitting diodes are easily affected by leakage currents and noises caused by various causes, and malfunctions occur when unintended power such as leakage currents or noises is applied. May be visually recognized.

  For this reason, a protective light emitting diode accessory, such as a resistor or a capacitor, may be provided to protect the light emitting diode from unintended power. And when attaching such an accessory part to a light emitting diode, when it was common to arrange | position outside the cylindrical body of the case body which accommodates a light emitting diode, in the said patent document 1, it is on a circuit board. In order to improve space efficiency, noise countermeasure parts are adjacently arranged on both sides so as to sandwich the light emitting diode in the cylindrical body.

JP 2002-168660 A

  According to the technique of the above-mentioned Patent Document 1, a space is always required on both sides of the LED, and the following problem occurs. First, when the LED is arranged near the end face of the substrate, the size of the circuit board is increased by providing an element arrangement space on both sides of the LED.

  Secondly, it may be difficult to arrange an electric component such as a microcomputer having a large arrangement space. Alternatively, even if the microcomputer can barely be arranged, there are cases where elements or the like that are desired to be arranged as close as possible to the microcomputer cannot be arranged as close as possible.

  Next, the above problem will be specifically described. The circles in FIG. 7 indicate the LED arrangement necessary for an example of a conventional instrument. This arrangement and the dimensions between them depend on the design of the instrument and are difficult to change. Based on the conventional idea of the above-mentioned Patent Document 1, when the LEDs and the accessory parts are arranged, FIG. 8 is obtained.

  FIG. 8 is a layout view showing a comparative example in which the accessory parts of the light emitting element are arranged based on the conventional idea of the above-mentioned Patent Document 1. In FIG. In FIG. 7, a capacitor C and a resistor R, which are accessory parts, are arranged on the circuit board 1 on both sides of the light emitting element D (LED). The wiring pattern on the circuit board 1 is not shown.

  In this case, the peripheral edge of the circuit board 1 is rectangular, but various other shapes are also conceivable. A size in which the peripheral portion can surround the LED and the group of accessory parts C and R, that is, a vertical size and a horizontal size are required. And if this vertical dimension and horizontal dimension are large, the size of the entire instrument will inevitably increase. For this reason, the idea of reducing the size of the circuit board without changing the arrangement of LEDs and the size between them determined by the design of the instrument is desired.

  Next, FIG. 9 shows a conventional problem shown in another example. That is, FIG. 9 is a layout diagram showing as a comparative example a case where a large-sized component cannot be mounted on a predetermined space due to the layout of light-emitting elements and accessory components even when a large-sized electrical component needs to be mounted.

  In FIG. 9, even if it is necessary to mount a large electrical component such as a microcomputer M (also simply referred to as a microcomputer) on a circuit board, the arrangement of LEDs is determined by the design of the instrument, and a conventional patent When the arrangement of the LEDs and the accessory parts C and R is determined according to the concept of Document 1, the microcomputer M may not be mounted on the space SP surrounded by the broken line in the figure.

  In this case, changing the mounting position of the microcomputer M is not preferable because it involves a change in a wiring pattern (not shown). Therefore, there is a need for an idea that a large electrical component M can be easily mounted at a predetermined position between the LEDs without changing the arrangement and mutual dimensions of the LEDs determined by the design of the instrument.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to design an instrument in an illumination device in which a cylindrical body is formed so as to surround a light emitting element. It is an object of the present invention to provide an illuminating device that can efficiently mount components mounted on a circuit board in a limited space of the circuit board without changing the arrangement of light emitting elements and the dimensions between them.

  More specifically, an object of the present invention is to provide an illuminating device capable of reducing the size of a circuit board without changing the arrangement of light emitting elements determined by the design of the instrument and the size between them. Alternatively, it is an object of the present invention to provide an illuminating device that easily mounts a large electric component at a predetermined position between light emitting elements without changing the arrangement of light emitting elements determined by the design of the instrument and the size between them.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

  In order to achieve the above object, the present invention employs the following technical means. That is, in the first aspect of the present invention, a circuit board having a wiring pattern, a plurality of light emitting elements that are positioned and arranged on the wiring pattern, each illuminating a specific indicator portion, and each of the light emitting elements In an illuminating device having an accessory part of a light emitting element connected and arranged on a wiring pattern, and a large number of cylindrical bodies surrounding the light emitting element and the accessory part and disposed between a circuit board and an indicator part The light emitting elements are arranged adjacent to the peripheral edge of the circuit board through a part of the cylindrical body, and the accessory parts are juxtaposed adjacent to the light emitting elements on the side opposite to the peripheral edge. It is a feature.

  According to this invention, since the peripheral portion of the circuit board is adjacent to the light emitting element through a part of the cylindrical body, the circuit board can be mounted without changing the position between the light emitting elements from the previously positioned position. Can be configured small.

  The invention according to claim 2 is characterized in that the longitudinal direction of the light emitting element and the longitudinal direction of the accessory are arranged along the extending direction of the peripheral edge of the circuit board.

  According to the present invention, the circuit board can be reduced to the minimum size, and the lighting device on which the circuit board is mounted becomes small.

  In the invention according to claim 3, a circuit board having a wiring pattern, a plurality of light emitting elements that are positioned and arranged on the wiring pattern, each illuminating a specific indicator portion, and connected to each of the light emitting elements. And an illumination device having a light emitting element accessory component disposed on the wiring pattern, and a cylindrical body that surrounds the light emitting element and the accessory component and is disposed between the circuit board and the indicator portion. Larger electrical components are mounted than the light-emitting elements and the accessory parts, and each light-emitting element is disposed adjacent to the periphery of the electrical part through a part of the cylindrical body, and the accessory part is a light-emitting element. It is characterized by being juxtaposed adjacent to the light emitting element with its longitudinal direction aligned with the longitudinal direction.

  According to the present invention, each light emitting element is arranged adjacent to the periphery of the electrical component via a part of the cylindrical body, the accessory part is juxtaposed next to the light emitting element, and the length of the light emitting element is Since the same direction and the longitudinal direction of the accessory are aligned, a relatively large electrical component can be mounted on the circuit board by utilizing as much as possible the space between a large number of light emitting elements positioned and arranged on the wiring pattern. I can do it.

  The invention according to claim 4 is characterized in that the longitudinal direction of the light emitting element is arranged along the periphery of the large electric component.

  According to the present invention, since the longitudinal direction of the light emitting element is arranged along the periphery of the electric component, the distance between the electric component and the light emitting element is reduced, and a relatively large electric component is limited. It can be mounted in a space on a circuit board.

  The invention according to claim 5 is characterized in that the large electric component is composed of a microcomputer.

  According to the present invention, a relatively large microcomputer can be mounted on a circuit board on which each light emitting element is mounted.

  In the invention according to claim 6, the accessory part comprises a plurality of noise countermeasure parts for preventing each of the light emitting elements from erroneously lighting due to noise, and one of the noise countermeasure parts is the light emitting element and the other noise countermeasure. The noise countermeasure component arranged so as to be sandwiched between the components is housed in a cylindrical body together with the light emitting element.

  According to the present invention, since the noise countermeasure component is provided adjacent to the light emitting device, the light emitting device and the accessory component can be connected via a short wiring pattern, and the pulse shape applied to the light emitting device. It is possible to prevent erroneous lighting due to noise such as.

  In a seventh aspect of the invention, the circuit board comprises a circuit board in a vehicle instrument, and has a display panel having an indicator portion that is arranged at a predetermined interval with respect to the circuit board and is illuminated by a light emitting element. The plurality of light emitting elements illuminate the indicator portion formed on the display panel, and each light emitting element is electrically connected to each of the light emitting elements between the circuit board and each indicator portion. A cylindrical body that wraps the accessory part and guides the light of the light emitting element to each indicator portion is provided.

  According to the present invention, the circuit board in the vehicle instrument can be made small, and a large number of light emitting elements can be positioned in a limited space. In addition, the degree of freedom of positioning of the indicator portion of the vehicle instrument that is particularly required to be miniaturized increases, and design constraints can be reduced.

  In addition, the code | symbol in parentheses described in a claim and each said means is an example which shows the correspondence with the specific means as described in embodiment mentioned later easily, and limits the content of invention is not.

It is a front view of the meter for vehicles by which the illuminating device in 1st Embodiment of this invention was integrated. It is sectional drawing which follows the arrow II-II line | wire of FIG. 1 in the said embodiment. It is principal part sectional drawing which expands and shows the area | region of the arrow III in FIG. 2 in the said embodiment. It is a connection diagram which shows the connection condition of the light emitting element and accessory component in the said embodiment. FIG. 4 is a layout diagram schematically showing the layout of a large number of sets of light emitting elements and accessory parts mounted on a circuit board in the embodiment. It is a layout drawing which shows arrangement | positioning of the light emitting element on a circuit board, a large sized electrical component, etc. which show 2nd Embodiment of this invention. It is an arrangement view showing arrangement of light emitting elements required for an example of a conventional instrument. FIG. 8 is a layout view showing a comparative example in which accessory parts are arranged corresponding to the positions of the LEDs shown in FIG. 7 based on the conventional concept of Patent Document 1. In the circuit board of the conventional illuminating device, it is an arrangement | positioning figure which shows the case where a large sized component cannot be mounted on predetermined space as a comparative example.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is a front view of a vehicle meter in which the illumination device according to the first embodiment of the present invention is incorporated. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is an essential part cross-sectional view showing an enlarged area indicated by an arrow III in FIG.

  The vehicle instrument includes the circuit board 1, the instrument body 2, the case body 3, the display panel 4, the pointer 5, the facing plate 6, the see-through cover 7, and the protective cover 8 of FIG. 2. The circuit board 1 is made of a paper phenolic or glass epoxy hard circuit board, and a plurality of wiring patterns (not shown) made of a predetermined copper foil material are formed on the upper surface (front side in FIG. 1). The light-emitting element D and circuit elements C and R (described later in detail) in FIG. 2 are mounted on the wiring pattern. Other circuit parts (not shown) (for example, a driving IC or a microcomputer for driving the light emitting element D or the light emitting element D) different from the light emitting element D and the circuit elements C and R are mounted.

  2 is mounted on the back side (lower side) of the circuit board 1 where the wiring pattern is not formed, and for example, a drive shaft 21 that rotates according to a measurement amount composed of a traveling speed and a driving shaft 21 that is not illustrated. A terminal penetrates the circuit board 1 and protrudes forward, and the terminal is soldered to the wiring pattern.

  The case body 3 of FIG. 2 is located on the circuit board 1 between the circuit board 1 and the display panel 4, and is located on the front region corresponding to the instrument body 2 in the center of FIG. It has a substantially bowl-shaped reflecting portion 31, and cylindrical bodies 32 respectively corresponding to an indicator portion and a light emitting element D described later of the display panel 4.

  The cylindrical body 32 is made of a colored resin and includes a first opening 33 (FIG. 3) that opens to the display panel 4 side and a second opening 34 that opens to the circuit board 1 side. The first opening 33 side has a larger diameter and the second opening 34 side has a smaller diameter, and the cylindrical inner wall 35 guides light of the light emitting element D forward. ing.

  In the display panel 4, a light-shielding ground portion 42 is formed on a base material 41 made of a transparent material, and the cutout portions 43 and 44 in FIG. 1 where the ground portion 42 is not formed are partially formed. In this case, as shown in detail in FIG. 1, an index portion 45 that forms a display portion that has a light shielding property and is an indication target of the pointer 5 is formed in the annular extraction portion 43. The indicator portion 45 is made of the same material as the ground portion 42 in FIG.

  In addition, an indicator portion 46 made of a notification or warning graphic that forms a part of a brake indicator, an ABS indicator, a cooling water indicator, an engine check indicator, a battery indicator, or the like is formed by a predetermined-shaped extraction portion 44. .

  Among these indicator portions 46, the indicator portions 46 constituting a brake indicator, an ABS indicator, a cooling water indicator, a beam indicator, a shift indicator, and the like are arranged in a row or group on the left side in FIG.

  Moreover, the indicator part 46 which comprises an airbag indicator, an engine check indicator, a battery indicator, etc. is arrange | positioned so that the row | line | column or group may be made in the right side in FIG.

  Each indicator section 46, a plurality of light emitting elements D corresponding to each indicator section 46, and a plurality of cylindrical bodies 32 surrounding these light emitting elements D constitute an indicator group forming a column or an aggregate. The indicator portion 46 is not formed only by the punched portion 44 but actually includes a colored portion (not shown) provided on the punched portion 44 and a smoke portion covering the front of the colored portion.

  The pointer 5 shown in FIG. 1 is made of an opaque material, so that a predetermined region emits light when the light emitting element D in the center of FIG. It has become. The facing plate 6 in FIGS. 1 and 2 is made of an opaque material that exposes a predetermined area of the display panel 4, and the see-through cover 7 in FIG. 2 is made of a transparent material that covers the facing plate 6. The cover 8 covers the back surface of the circuit board 1 and the meter body 2.

  The circuit element C as the accessory parts C and R of the light emitting element D is composed of a capacitor. The circuit element R is composed of a resistor, and these are all composed of surface-mounted chip components. The circuit elements C and R protect the light emitting element D and prevent the light emitting element D from malfunctioning due to unintended power such as noise.

  The light emitting element D and the circuit elements C and R are arranged on the circuit board 1 with the circuit elements C and R positioned on the side of the light emitting element D. The surface of the circuit board 1 is covered with a resist (not shown), but there is also a resist removal portion that removes the resist and partially exposes the wiring pattern. Then, the light emitting element D and the circuit elements C and R are mounted on the resist removing portion by reflow soldering means.

  Here, paying attention to the relationship with the cylindrical body 32, the light emitting element D and the circuit elements C and R as the accessory parts correspond to the second opening 34 side of the cylindrical body 32 as shown in FIG. On the area of the circuit board 1 to be accommodated, it is accommodated in an area that fits within the inner diameter of the second opening 34.

  At this time, the light emitting element D and each of the accessory parts C and R are separated by a predetermined distance from the inner wall portion 35 on the end side that defines the inner diameter of the opening 34. Here, in FIG. 2, the peripheral portion of the cylindrical body 32 in the region III has been described as a representative example, but other portions corresponding to the indicator portion 46 have the same configuration.

  FIG. 4 is a partial circuit diagram showing a connection relationship between the light emitting element D and the accessory parts C and R. Attached parts C and R including a capacitor C and a resistor R are connected in parallel to a light emitting element D connected to the power source side via a driving resistor R1 by a part of the wiring pattern P on the circuit board 1. .

  FIG. 5 schematically shows a set of a number of light emitting elements D and circuit elements C and R mounted on the circuit board 1 of FIGS. 2 and 3 in the first embodiment. Two or more circuit elements C and R that are mounted in parallel with the light emitting element D for noise countermeasures that cause instantaneous lighting or the like are juxtaposed on the side surface of the light emitting element D. That is, the circuit elements C and R are disposed only on one side of the light-emitting element D when the light-emitting element D is mounted in the cylindrical body 32 for guiding the light of the light-emitting element D and emitting only a predetermined portion. The details will be described below.

  In FIG. 5, on the circuit board 1 having a wiring pattern (not shown), a plurality of light-emitting elements D are arranged and positioned on the wiring pattern, and each illuminates a specific index portion 46 in FIGS. Have.

  Circuit elements C and R which are connected to each of the light emitting elements D and are attached to the light emitting elements D disposed on the wiring pattern are provided. And it has the many cylindrical bodies 32 which enclose the said light emitting element D and the accessory components C and R, and are arrange | positioned between the circuit board 1 and the parameter | index part 46. FIG.

  In the peripheral part of the circuit board 1 (in this first embodiment, there is a peripheral part 1a, 1b, 1c, 1d consisting of four sides because it is a rectangular circuit board 1 as schematically shown in FIG. 5), The light emitting elements D are arranged adjacent to each other through a part of the cylindrical body 32.

  In other words, in this case, the end portions of the cylindrical body 32 are adjacent to the peripheral edge portions 1a, 1b, and 1c, and the light emitting elements D are adjacent to the end portions of the cylindrical body 32 in the cylindrical body 32. Are arranged to be. The accessory parts C and R are juxtaposed with each other adjacent to the light emitting element D on the side opposite to the peripheral edges 1a, 1b and 1c.

  According to this, since the peripheral portions 1a, 1b, and 1c of the circuit board 1 are adjacent to the light emitting element D through a part of the cylindrical body 32, the position between the light emitting elements D is changed from the previously positioned position. Even if it does not do, the circuit board 1 can be comprised small. This size reduction is obvious when compared with the circuit board 1 of FIG. 8 (referred to as 1CP in FIG. 5) as a comparative example.

  Further, the longitudinal direction of the light emitting element D and the longitudinal directions of the accessory parts C and R (arrow Dya, Dyb, and Dyc directions) are arranged along the extending direction of the corresponding peripheral portions 1a, 1b, and 1c of the circuit board 1. ing. For example, the light emitting elements D1 and D2 adjacent to the peripheral portion 1a are arranged along the longitudinal direction Dya of the peripheral portion 1a. According to this, the circuit board 1 can be made to the minimum size, and the lighting device on which the circuit board 1 is mounted becomes small.

  As described above, according to the first embodiment, the noise countermeasure components C and R are connected to the light emitting element D via the wiring pattern on the wiring board 1 and are both housed in the cylindrical body 32. Therefore, the noise countermeasure parts C and R are provided adjacent to the light emitting element D, and the light emitting element D and the noise countermeasure accessory parts C and R can be connected via a short wiring pattern.

  Moreover, it has the display panel 4 (FIG. 2) which has the indicator part 46 which is arrange | positioned at predetermined intervals with respect to the circuit board 1 in a vehicle meter, and is illuminated with the light emitting element D, and many light emitting elements D Illuminates the indicator portion 46 formed on the display panel 4, and each of the light emitting elements D between the circuit board 1 and each indicator portion 46 is electrically connected to each of the light emitting elements D. A cylindrical body 32 that wraps the parts C and R and guides the light of the light emitting element D to each indicator portion 46 is provided.

  According to this, the circuit board 1 in a vehicle meter can be made small, and many light emitting elements D can be positioned in a limited space. In addition, the degree of freedom of positioning of the index portion 46 of the vehicle instrument that is particularly required to be reduced can be increased, and design restrictions can be reduced.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different configurations and features will be described. FIG. 6 is a layout diagram illustrating the layout of light emitting elements and large electrical components on the circuit board according to the second embodiment. In FIG. 6, a plurality of light-emitting elements D that are positioned and arranged on a wiring pattern (not shown) on the circuit board 1 and illuminate a specific indicator portion 46 (FIG. 2) are provided.

  Each of the light emitting elements D includes a capacitor C and a resistor R that are attached to the light emitting element D. And it has the cylindrical body 32 which encloses the light emitting element D and the accessory components C and R, and is arrange | positioned between the circuit board 1 and the said indicator | index part 46. FIG.

  On the circuit board 1, a microcomputer M, which is an electric component larger than the light emitting element D and the accessory parts C and R, is mounted. And each light emitting element D is arrange | positioned adjacent to the periphery of the electrical component M through a part (wall part) of the cylindrical body 32. As shown in FIG. Further, the accessory parts C and R are juxtaposed adjacent to the light emitting element with the longitudinal direction of the light emitting element D aligned with the longitudinal direction of the light emitting element D.

  According to this, it is possible to mount a relatively large electric component M on the circuit board 1 by utilizing as much as possible the space between the plurality of light emitting elements D positioned and arranged on the wiring pattern. Further, it is easy to secure the spaces SPm1 and SPm2 in which the related parts of the microcomputer M are mounted adjacent to the microcomputer M.

  Next, among the cylindrical bodies 32a, 32b, and 32c in the cylindrical body 32 shown in FIG. 6 in which the position of the light emitting element D is close to the microcomputer M to be mounted, a micro-sized electric component is used. A longitudinal direction of the light emitting element D is arranged along the periphery of the computer M.

  According to this, since the longitudinal direction of the light emitting element D is disposed along the peripheral edge of the electric component M, the distance between the electric component M and the light emitting element D is reduced, so that the relatively large electric component M is arranged. Can be mounted in a limited space on the circuit board 1.

DESCRIPTION OF SYMBOLS 1 Circuit board 1a, 1b, 1c Peripheral part of a circuit board 4 Display panel 32 Cylindrical body 46 Index part C, R The accessory component which consists of noise countermeasure components of a light emitting element D Light emitting element Dya, Dyb, Dyc Longitudinal direction M Microcomputer that becomes a large electrical component P Wiring pattern

Claims (7)

A circuit board having a wiring pattern, a plurality of light emitting elements that are positioned and arranged on the wiring pattern, each illuminating a specific indicator portion, and connected to each of the light emitting elements and arranged on the wiring pattern In the illuminating device comprising the accessory part of the light emitting element, and a plurality of cylindrical bodies that surround the light emitting element and the accessory part and are disposed between the circuit board and the indicator portion,
The light emitting elements are arranged adjacent to the peripheral edge of the circuit board via a part of the cylindrical body, and the accessory parts are juxtaposed adjacent to the light emitting elements on the side opposite to the peripheral edge. The lighting device characterized by being made.   The lighting device according to claim 1, wherein a longitudinal direction of the light emitting element and a longitudinal direction of the accessory are arranged along an extending direction of a peripheral portion of the circuit board. A circuit board having a wiring pattern, a plurality of light emitting elements that are positioned and arranged on the wiring pattern, each illuminating a specific indicator portion, and connected to each of the light emitting elements and arranged on the wiring pattern In the illuminating device comprising: an accessory part of the light emitting element; and a cylindrical body that surrounds the light emitting element and the accessory part and is disposed between the circuit board and the indicator part.
Larger electrical parts are mounted on the circuit board than the light emitting element and the accessory parts,
Each of the light emitting elements is disposed adjacent to a peripheral edge of the electrical component via a part of the cylindrical body,
2. The lighting device according to claim 1, wherein the accessory part is juxtaposed adjacent to the light emitting element with its longitudinal direction aligned with the longitudinal direction of the light emitting element.   The lighting device according to claim 3, wherein a longitudinal direction of the light emitting element is disposed along a peripheral edge of the large electric component.   5. The lighting device according to claim 3, wherein the large electric component is a microcomputer.   The accessory part includes a plurality of noise countermeasure parts that prevent each of the light emitting elements from erroneously lighting due to noise, and one of the noise countermeasure parts is sandwiched between the light emitting element and the other noise countermeasure part. The lighting device according to any one of claims 1 to 5, wherein the noise countermeasure component is disposed in the cylindrical body together with the light emitting element. The circuit board comprises a circuit board in a vehicle instrument, and has a display panel having an indicator portion that is arranged at a predetermined interval with respect to the circuit board and is illuminated by the light emitting element,
The plurality of light emitting elements illuminate the indicator portion formed on the display panel, and each of the light emitting elements is electrically connected to each of the light emitting elements between the circuit board and each indicator portion. The illumination according to any one of claims 1 to 6, wherein the cylindrical body that wraps the accessory part connected to the light guide and guides the light of the light emitting element to the indicator portions is disposed. apparatus.

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