JP5477656B2 - Instrument lighting device - Google Patents

Description

    The present invention is mounted on, for example, a special vehicle such as a construction machine, a ship, an automobile, a motorcycle, and the like, and is an illumination device for an indicating instrument that displays a display board (display panel) or a pointer with illumination light from a light source. The present invention relates to an instrument illuminating device that displays and displays an instruction unit.

  Conventionally, as an indicator for an automobile, for example, an indicator that illuminates and displays a display board (display panel provided with an indicator) and a pointer with a light beam emitted from a light source. For this purpose, there is known a meter illumination device of a light emission pointer type in which a pointer is transmitted and illuminated (light emission illumination) with a light beam emitted from a light source.

  This instrument illuminating device obtains illumination colors having various shades such as red and blue as shades of the pointers that emit light. In recent years, as an eco-indication that encourages driving to improve fuel efficiency, the lighting color consisting of green shades is displayed on the display board, and the illumination color of the indicator section provided on the display board is illuminated with green hues May be displayed. In addition, there has been proposed a pointer illumination unit that emits and displays a pointer indicating part in green in accordance with the eco display color.

  Further, since the pointer is illuminated and displayed with the same light source together with the display board, the cost can be reduced. Therefore, generally, a light emitting diode made of white light (see, for example, Patent Document 1) is applied as the light source. The white light from the light emitting diode is received from the base side of the light emitting pointer, and the pointer indicating portion is displayed in green (transmission display), and the white light of the white light emitting diode is directed to the indicator side of the display panel. The color of the indicator part, for example, a green printing layer is applied so that the indicator part is transparently illuminated in green in the rotation region during normal running of the engine rotation, and the engine rotation instruction is high rotation In the red zone region, the indicator portion provided on the display panel is transmitted and illuminated as an illumination color composed of red or orange.

JP 2006-261540 A

  By the way, in the above-mentioned Patent Document 1 and the like, the above-described white light-emitting diode is formed by covering with a sealing resin of a blue light-emitting diode chip and a filling resin mixed with a yellow light-emitting phosphor on the surface thereof. The white light emission is obtained with a mixed color of the light from the blue light emitting diode chip and the light from the yellow light emitting phosphor.

  Further, in the case where the emission color of the pointer is made to emit green light, a pigment composed of blue and yellow is contained in the transparent resin so that green is obtained with a mixed color of blue and yellow.

  However, since such a light emitting type pointer generally uses a white light emitting diode composed of a blue component and a yellow component as described above, the blue pigment contained in the indicated portion of the pointer emits white light. Since it is emphasized by the blue light component of the diode and becomes a bluish green emission color, in order to obtain a green emission color, it is necessary to increase the yellow pigment so that it can approach green. At this time, the more the yellow pigment is added, the lower the transmittance of the pointer indicating portion. As a result, the emission luminance of the pointer indicating portion is lowered, which causes a problem in terms of visibility.

  Accordingly, the present invention focuses on the above-described problems, and an object thereof is to provide a meter illumination device capable of obtaining a light emitting type pointer having a pointer unit for green and high luminance light emission.

  In order to solve the above-described problems, the present invention provides a circuit board made of a hard material, a meter body disposed on the circuit board and having a drive shaft extending forward, and attached to the tip side of the drive shaft. A synthetic resin pointer made of a translucent material, a display board disposed between the pointer and the circuit board, and having an indicator corresponding to an instruction of an indicator provided on the pointer, and the circuit An instrument illuminating device comprising a light source disposed on the surface side of the substrate and illuminating the indicator portion of the pointer and the indicator portion of the display board, wherein the light source is a white light that combines a blue light emitting diode chip and a yellow light emitting phosphor The indicator comprises a light emitting diode, and the pointer includes a green light emission indicator obtained by a mixed color of blue and yellow pigments, and at least the indicator includes a yellow fluorescent pigment. The lighting device.

  With this configuration, the green light emission type pointer can be obtained with a mixed color of a blue pigment and a yellow pigment. The light emission pointer can be obtained, the illumination brightness of the entire instrument illumination device can be increased, and the illumination effect of the instrument with good visibility can be expected.

  According to a second aspect of the present invention, in the instrument illuminating device according to the first aspect of the present invention, a hot stamp layer having a high reflectance is provided on the back surface side of the indicator.

  With this configuration, the light irradiated on the back side of the pointer indicating unit is reflected and easily reaches the line-of-sight direction, so that the pointer indicating unit can be brightly illuminated. At this time, the amount of light that is attenuated when reflection is repeated up to the front end side of the pointing unit can be suppressed by the hot stamp layer having a high reflectance, and light can be emitted brightly up to the front end of the pointing unit.

  In the present invention, a circuit board made of a hard material, an instrument body disposed on the circuit board and having a drive shaft extending forward, and a pointer made of a synthetic resin made of a translucent material attached to the distal end side of the drive shaft And a display board disposed between the pointer and the circuit board and having an indicator corresponding to an instruction of an instruction section provided on the pointer, and an instruction section of the pointer disposed on the surface side of the circuit board And a light source that illuminates the indicator portion of the display board, wherein the light source is a white light emitting diode that combines a blue light emitting diode chip and a yellow light emitting phosphor, and the pointer is blue and yellow Since it is a meter illuminating device comprising a green emission indicator obtained by a mixed color of pigment and at least the indicator contains a yellow fluorescent pigment, a green emission pointer It can be obtained in a mixed color of blue pigment and yellow pigment, but by adding a yellow fluorescent pigment, it is possible to obtain a light emission pointer with a pointer indicator for green and high-luminance emission, and the entire instrument illumination device The illumination brightness of the instrument can be increased, and the illumination effect of the instrument with good visibility can be expected, whereby the initial purpose can be achieved.

It is a front view which shows the meter illuminating device which is the 1st Embodiment of this invention. It is sectional drawing which shows the principal part of the AA line location of FIG. It is an expanded sectional view which shows the principal part of FIG.

  An instrument illumination device for a vehicle will be described in detail as an example of the instrument illumination device to which the present invention is applied. Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show a first embodiment of the present invention. A pointer 3 is fixed to the distal end side of a pointer shaft 2 of a meter body 1 and rotates around the pointer shaft 2, and a rear surface of the pointer 3. A display board 4 provided with an indicator portion 4A composed of a scale, numerals, symbols, etc., which is positioned on the side and transmitted and illuminated, a hard circuit board 5 located on the back side of the display board 4, and the circuit board 5 The white light-emitting diode 6 that is a light source for illuminating and displaying the pointer 3 and the display board 4 respectively, and the reflecting wall 7A for illuminating the illumination area for transmitting and illuminating the display board 4 by the white light-emitting diode 6 And a case body 7 made of a synthetic resin frame having a cylindrical partition wall 7B for partitioning the pointer 3.

  An instrument body 1 that rotates the pointer shaft 2 is attached and fixed behind the circuit board 5.

  In addition, as the pointer 3 to be illuminated and illuminated, the pointer main body 30 having a translucent instruction portion 31 made of a transparent synthetic resin, for example, acrylic resin, and the upper surface of the rotation center region on the base side of the pointer main body 30 The guide cap 32 made of a black light-shielding synthetic resin covering the side and the periphery thereof, and the base side of the pointer main body 30 which is the rotation center region of the pointer main body 30 are supported and attached to the rotating shaft 2 of the instrument main body 1 And a substantially flat pointer seat 33 made of a black synthetic resin to be fixed. In the present embodiment, the indicator 31 is formed so as to extend in a substantially horizontal direction from the base side of the pointer 3, which is the rotation center region of the pointer main body 30, along the indicator portion 4 </ b> A of the display plate 4. .

  Further, the white light emitting diode 6 as the light source is made of a light emitting diode chip 61 that emits blue light, for example, and a filling resin 63 in which a yellow phosphor 62 is mixed on the surface, in the same manner as a generally used configuration. The white light emitting diode is formed by stacking and exciting the phosphor 62 with the light from the light emitting diode chip 61 and mixing the light from the light emitting diode chip 61 with the light from the phosphor 62. When light is emitted from 6 to the outside, blue and yellow, which are complementary to each other, are mixed to obtain white light.

  In addition, the pointer 3 in the present embodiment is formed of a transparent synthetic resin, for example, acrylic resin. When the pointer 3 emits green light when the pointer 3 is molded, the pigment p composed of blue and yellow is used. Are contained in the transparent resin, so that a green hue can be obtained in a mixed color of blue and yellow.

  Further, when the pointer 3 is caused to emit green light using the white light emitting diode 6 described above, the green color of the pointer 3 which is affected by the color of the light emitting diode chip 61 that emits blue light of the white light emitting diode 6, which was a conventional defect. In order to make up for the point that the sharpness tends to be insufficient and to increase the illumination brightness, in the present embodiment, in addition to the pigment p composed of blue and yellow, a yellow fluorescent pigment f is included when the pointer 3 is molded. I have to.

  On the back side of the indicator 31 of the pointer 3, a hot stamp layer 34 having a high reflectance, such as white, is provided.

  The display board 4 has an index portion 4A such as scales, numbers, and characters printed on the surface of a substrate made of a light-transmitting synthetic resin material. As the color of the index portion 4A, for example, a normal engine rotation speed A green print layer is applied so that the indicator portion 4A is illuminated in green in the rotation area during traveling, and the red zone area in which the engine rotation instruction is high rotation is displayed as an illumination color of red or orange. The indicator portion 4A provided on the plate 4 is provided so as to be transmitted and illuminated.

  In addition, the ground color portion 4B of the display board 4, which is a region other than the index portion 4A, is printed and formed by a ground color printing layer that is opaque, such as black.

  In the meter illumination device according to the first embodiment having the above-described configuration, the light beam emitted from the white light emitting diode 6 is part of the light beam via the cylindrical partition wall 7B that partitions the illumination area of the pointer 3. Enters the pointer main body 30 of the pointer 3 and the indicator 31 is lit in green via a reflecting surface provided on the pointer main body 30.

  At this time, the pointer 3 of the green light emission type is obtained by a mixed color of the blue pigment p and the yellow pigment p, but in order to compensate for the point that the sharpness of the green color of the pointer 3 tends to be insufficient, the yellow fluorescent pigment f Can be added to obtain a light emission pointer having the indicator 31 of the green and high-luminance light emission pointer 3 having a clear color, thereby increasing the illumination brightness of the entire instrument illumination device, The lighting effect of the instrument with good characteristics can be expected.

  Further, by providing a hot-reflecting layer 34 having a high reflectance such as white on the back surface side of the indicating portion 31 of the pointer 3, it is reflected in the line-of-sight direction by the light irradiated on the back surface side of the indicating portion 31 of the pointer 3. And the pointer indicating unit 31 can be illuminated brightly. At this time, the amount of light that is attenuated when reflection is repeated up to the front end side of the instruction unit 31 by the hot stamp layer 34 having a high reflectance can be suppressed, and light emission to the front end of the instruction unit 31 can be performed brightly.

  Further, a part of the light beam emitted from the white light emitting diode 6 through the reflection wall 7A for illuminating the illumination area for transmitting the display plate 4 is guided to the indicator portion 4A side and transmitted by the indicator portion 4A. Illuminated. At this time, the indicator portion 4A is transmitted and illuminated in green in the rotation region during normal running of the engine rotation, and the display board 4 is displayed as a red or orange illumination color in the red zone region where the engine rotation instruction is high rotation. The indicator portion 4A provided above is transmitted and illuminated.

  Therefore, the white light emitting diode 6 is common, the indicator 31 of the pointer 3 emits green light, the indicator portion 4A of the display board 4 can be illuminated with different shades, such as green and red, and bright. Clearly illuminated display.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in the embodiment, the pointer main body that is the rotation center region of the pointer main body 30 30, a substantially flat pointer seat 33 made of a black synthetic resin that is attached and fixed to the rotating shaft 2 of the meter body 1 is separately provided on the back side of the base body side 30 to form the pointer. The light receiving portion that directly receives the white light emitting diode 6 that is a light source may be provided on the back surface of the base portion side of 30. Also, the pointer 3 is formed by dividing the pointer main body 30 locations and the indicator portion 31. There may be. In addition, the indication portion 31 of the pointer 3 is formed so as to extend in a substantially horizontal direction along the surface of the display plate 4. However, as the shape of the indication portion 31, the tip side is curved upward or the tip side is It may be formed so as to be partially bent toward the display panel 4 side, and the thickness dimension of the indicating portion 31 may be appropriately set.

  In addition, when the pointer 3 is molded, in addition to the pigment p composed of blue and yellow, a yellow fluorescent pigment f is contained when the pointer 3 is molded. A predetermined hue can be adjusted by appropriately setting the composition of the yellow fluorescent pigment f and the like.

  In addition, as described in detail in the above-described embodiment, the description has been given by taking the instrument illumination device in an automobile, a motorcycle, etc. as an example. However, the instrument illumination device is not limited to a vehicle, but is used in a marine instrument, an agricultural machine, a construction machine, or the like. The same effect can be obtained.

f Fluorescent pigment (yellow)
p Pigment (blue, yellow)
1 Instrument body 2 Drive shaft (pointer shaft)
3 Pointer 4 Display board 4A Indicator part 4B Ground color part 5 Circuit board 6 White light emitting diode 7 Case body 7A Reflecting wall 7B Partition wall 30 Pointer body 31 Indicator part 32 Pointer cap 33 Pointer seat 34 Hot stamp layer 61 Light emitting diode chip (blue) )
62 Phosphor (yellow)
63 Filling resin

Claims (2)

  A circuit board made of a hard material, an instrument body disposed on the circuit board and having a drive shaft extending forward, a pointer made of a synthetic resin made of a translucent material attached to the tip side of the drive shaft, and the pointer And a display board disposed between the circuit board and having an indicator portion corresponding to an instruction of an instruction section provided on the pointer, and the pointer instruction section and the display board disposed on the surface side of the circuit board And a light source that illuminates the indicator portion of the indicator lighting device, wherein the light source is a white light emitting diode that combines a blue light emitting diode chip and a yellow light emitting phosphor, and the pointer is a mixed color of blue and yellow pigments The instrument illumination device comprising the green light emission instruction unit obtained by the above, and at least the instruction unit includes a yellow fluorescent pigment. The instrument illumination device according to claim 1, wherein a hot stamp layer having a high reflectance is provided on a back surface side of the indication unit.

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