JP3084710B2 - Lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device for illuminating, by a plurality of light sources, a display plate disposed at an opening of a case body and a pointer indicating a display index formed on the display plate. is there.

[0002]

2. Description of the Related Art As a conventional lighting device, for example, a lighting device for a vehicle instrument is provided as a display plate formed by printing a transparent display index such as a character, a numeral, or a scale disposed at an opening of a case body. A dial, a light guide disposed behind the dial, and a pointer attached to the instrument main body to indicate the display index, a plurality of light sources disposed behind the dial Thus, the dial and the hands are illuminated.

As the vehicle instrument, there is a one-package type auxiliary instrument such as an intake pressure gauge, an exhaust thermometer, a tachometer, and the like, and a small-sized auxiliary instrument is desired. Therefore, it is necessary to efficiently illuminate the dial and hands in a limited space even as a lighting device for the auxiliary instrument. The lighting device of the auxiliary instrument,
Light emitting diodes (hereinafter referred to as LED)
By arranging a plurality of LEDs and dividing the light emitted from each LED into the dial and the hands using a partition plate (for example, an LED holder), the most efficient illumination can be obtained. Since the auxiliary meter is small, it is practically difficult to illuminate the dial and the pointer using the partition plate. Therefore, in the lighting device of the auxiliary meter, when illuminating the dial and the hands, a plurality of LEDs that can emit light of similar colors are arranged on a circuit board as an illumination light source, and the dial is illuminated. It is common practice to form a translucent colored layer on the display index and to apply a hot stamp or coloring to the pointer to illuminate the dial and the pointer without using the partition plate.

[0004] Further, as an illumination device for other auxiliary instruments,
For example, when the display indices of the dial are illuminated in green and the hands in red, the display indices of the dial are formed of a translucent colored layer having a green color, and the hands have a reddish color. This can be achieved by applying hot stamping or coloring, making the first LED for transmitted illumination of the dial green, and the second LED for illumination of the hands red. The illumination device having the above-described configuration can clearly illuminate the dial and the hands even without the partition plate, and utilizes characteristics of an emission wavelength range of an LED used as a light source, Color of colored layer and LE
D emission color and the color of the pointer (hot stamp or coloring)
And by substantially matching the emission color of the LED, the transmission spectrum of the color of the printing layer and the color of the pointer can be matched with the emission spectrum of each LED, and the dial and the pointer Can be clearly illuminated with a predetermined emission color.

[0005]

An illumination device for illuminating the dial and the pointer using an LED, in particular, uses an LED.
Due to the narrow emission wavelength range, the dial and the hands are illuminated with LEDs of different emission colors, even though the dial shape and dial design are similar, In the case of illuminating with the LED of the emission color, since the layout of the circuit board on which the LED is arranged is different, it is necessary to prepare a dedicated circuit board for each, and the design of the circuit board becomes complicated, There is a problem that the product cost is increased as a lighting device due to the design man-hours and material costs.

Accordingly, the present invention focuses on the above problems, and provides a lighting device capable of reducing the product cost without complicating the design of a circuit board.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a display plate having translucent display indices such as characters, numerals, and scales, a pointer for indicating the display indices, and A light guide disposed behind the plate for guiding light to the pointer; and a light emitting switch disposed behind the light guide and corresponding to each transmission spectrum of the display panel and the pointer .
A light source comprising a plurality of light emitting diodes having a spectrum, and a circuit board on which the light source is disposed, and a first light source for illuminating the display board and the hands with light sources of different colors on the circuit board. An arrangement pattern and a second arrangement pattern for illuminating the display plate and the pointer with light sources of substantially similar colors.

Further, at least one of the plurality of light sources arranged in at least one of the first and second arrangement patterns has a light guide portion extending from the light guide. The unevenness in illumination of the display panel caused by the arrangement is reduced.

[0009]

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a dial (display plate) 6 having a translucent display index 11 such as characters, numerals, and scales;
It has a pointer 7 indicating a display index 11 and a light guide 14 disposed behind the dial 6, and the light source disposed behind the light guide 14 illuminates the dial 6 and the pointer 7. And a lighting device. The illuminating device is provided with a plurality of light sources for illuminating the dial 6 and the hands 7 on the circuit board 2, and illuminates the circuit board 2 with the light sources of the different colors for the dial 6 and the hands 7. And a second arrangement pattern II for illuminating the dial 6 and the hands 7 with light sources of substantially similar colors. Accordingly, in a lighting device having a display form in which the dial 6 has the same shape and the dial 6 has a design similar to that of the dial 6, it is possible to obtain a lighting device that illuminates various light-emitting patterns with one circuit board 2. Will be.

When the light source is constituted by an LED,
Since the LED has a narrow emission wavelength range, the display index 1 of the dial 6
When the LED 1 and the pointer 7 are illuminated with different luminescent colors, and when illuminated with the same color luminescent color, the layout of the LEDs is significantly different, but the first layout pattern I and the second layout pattern By providing II on the circuit board 2, in a lighting device in which the dial 6 has the same shape and the dial 6 has a display form similar in design, the dial 6 and the hands 7 Not only can obtain various light emission patterns, but also can simplify the design of the circuit board 2, and since only one type of circuit board 2 is required, the design man-hour and the member cost are not required, and the lighting device As a result, the product cost can be reduced.

Further, at least one of the plurality of light sources arranged in at least one of the first and second arrangement patterns I and II is a light guide extending from the light guide 14. Since the uneven illumination of the dial 6 caused by the provision of the portion 15 is reduced, the dial 6 can be uniformly illuminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. In this embodiment, a lighting device for an auxiliary instrument, which is a vehicle instrument, will be described as an example.

FIG. 1 is a sectional view of an essential part showing a lighting device in an auxiliary instrument according to the present embodiment, FIG. 2 is a plan view showing a dial plate as a display board, and FIG. 3 is a plan view showing a circuit board. FIG. 4 shows an arrangement pattern.

The configuration of the illumination device in the auxiliary meter according to the present embodiment will be described with reference to FIGS. In such a lighting device, a circuit board 2 is disposed on the bottom of a case body 1, and a land portion formed at a predetermined position on the circuit board 2 has, for example, a first LED (light source) 3 for emitting green light. , And a second LED 4 that emits red light is mounted.
Thus, a dial (display panel) 6 and a pointer 7 which will be described in detail later, which are arranged in the opening 5 of the case body 1, are illuminated.

The instrument device 8 includes, for example, a rotating magnet as a movable portion that follows a change in a magnetic field generated by a drive signal to the cross coil, and a light-transmitting end is provided on a rotating shaft 9 erected from the rotating magnet. A base 10 holding the gender pointer 7 is fixed, and is a well-known type in which a change in the measurement amount can be known by reading the display index 11 formed on the dial 6 and the pointer 7 in comparison. The instrument main body 8 is electrically connected to the circuit board 2 via a terminal (not shown) provided at a lower part thereof.

The dial 6 has a circular shape, and is formed by printing a transparent layer of, for example, red or green color on a transparent substrate 12 of polycarbonate or the like. 11 is formed, and a light-shielding portion 13 for shielding light emitted from the back of the dial 6 is printed and formed on the other surface of the dial 6.

A light guide 14 is provided behind the dial 6, and the light guide 14 is a light guide for efficiently guiding the light emitted from the second LED 4 to the pointer 7. Fifteen
And uniformly illuminate the display index 11 of the dial 6. In the case where red light emission is obtained in the indicator 7,
The hands 7 may be colored red, or the hands 7 may be provided with a red hot stamp on the upper and lower ends.

The above-mentioned components constitute a lighting device in the auxiliary meter. Next, the circuit board 2 will be described in detail with reference to FIG.

The circuit board 2 has a circular shape similar to that of the dial 6, and LEDL1 to LEDL5 are mounted on lands. The LED L2 and the LED L4 are disposed on the first circumference a closest to the center of the circle at a position corresponding to the position where the light guide 15 of the light guide 14 is disposed. LEDL1
And LEDL5 are LE on the outermost second circumference b.
It is arranged at a position behind (in the figure, below) the DL2 and the LED L4. Further, the LED L3 is disposed at a predetermined position on the third circumference c between the first circumference a and the second circumference b. That is, the LEDL2 and the LEDL4 are connected to the light guide unit 1.
5 illuminate the pointer 7 via LEDL1, LEDL3 and LEDL3.
The LED L5 has a structure for transmitting and illuminating the display index 11 of the dial 6.

The circuit board 2 includes LEDL1 to LEDL5.
The display index 11 of the dial 6 and the pointer 7
And a second arrangement pattern II for illuminating the display indices 11 and the hands 7 of the dial 6 with substantially similar LEDs. ing.

In the first arrangement pattern I, as shown in FIG. 4, the display index 11 of the dial 6 and the pointer 7 are L-colors of different colors.
It is a layout configuration when illuminating with ED, and LED
An example in which L1, LEDL3, and LEDL5 are set to, for example, green, LEDL2 and LEDL4 are set to, for example, red, the display index 11 of the dial 6 is transmitted and illuminated in green, and the pointer 7 is illuminated in red. ing. However. In this case, the colored layer of the display index 11 is greenish and the pointer 7
By applying red hot stamping and coloring
The dial 6 and the pointer 7 are different by matching the transmission spectrum of the color of the printing layer and the color of the pointer 7 constituting the display index 11 with the emission spectrum of each LED that illuminates the display index 11 and the pointer 7 respectively. The colors enable clear illumination.

As shown in FIG. 4, the second arrangement pattern II is a layout configuration in the case where the display index 11 of the dial 6 is illuminated by LEDs of substantially the same color system as the display index 11, and includes the LEDs L2 and L2.
As the EDL3 and LEDL4, for example, an amber (orange) LED is used, and LEDL1 and LEDL5 are L
The layout does not have an ED. In this case, by configuring the coloring layer of the display index 11 and the hot stamp or coloring of the pointer 7 with an arbitrary color, various illumination modes can be obtained.

Each of the LEDs arranged in the first and second arrangement patterns I and II is turned on in conjunction with, for example, an illumination switch of a vehicle in a circuit wiring formed by a wiring pattern formed on the circuit board 2. It is. The second arrangement pattern II has a structure in which the LED L1 and the LED L5 are not provided. In this case, the LED L1 and the LE L5 are not provided.
The circuit wiring on the circuit board 2 of DL5 is open.

In the first arrangement pattern I described above,
The arrangement position of the LED L3 will be described. LEDL3
When the dial 6 is transmitted and illuminated by the LEDL1 and the LEDL5, it plays a role of alleviating illumination unevenness due to a shadow of the light guide 15 caused by light emitted toward the light guide 15 of the light guide 14. Things. That is, LEDL
3 are disposed on the circuit board 2 by the LEDs L1 and L1.
The position where the shadow of the light guide 15 generated by the light emitted from the EDL 5 toward the light guide 15 and the position where the display index 11 of the dial 6 is mixed is determined. In this embodiment, the first and second circumferences a and b of the circuit board 2 are used.
Is set so as to face the display index 11 of the dial 6, and the LEDL 3 is provided with the shadow and the display index 11.
On the third circumference c where the formation position of LEDL3 and LEDL1 are mixed,
3 and the LEDL5 are disposed with a distance substantially equal to the distance.

The illuminating device has a first arrangement pattern for illuminating the display index 11 of the dial 6 and the pointer 7 on the circuit board 2 with LEDs of different colors, the display index 11 of the dial 6 and the pointer. 7 is illuminated by LEDs of substantially the same color system and the second arrangement pattern, so that the illumination device for a vehicle instrument having an equivalent shape of the dial 6 and a similar dial design can be provided. In a lighting device for an auxiliary instrument such as a gauge, an intake pressure gauge, an exhaust temperature system, etc., it is possible to obtain illumination of various emission patterns on the dial 6 and the hands 7 by one circuit board 2, and to design the circuit board 2. It can be simplified. In addition, since only one type of circuit board 2 is required, design man-hours and member costs are not required, and it is possible to reduce the product cost of the lighting device.

In the first arrangement pattern,
The LEDL3 can alleviate illumination unevenness caused by disposing the light guide, so that the dial 6 can be uniformly transmitted and illuminated.

Also, as in this embodiment, an LED having a narrow emission wavelength range is used as a light source for illuminating the display index 11 of the dial 6 and the pointer 7, so that the display index 11 of the dial 6 and the pointer 7 can be reduced. When the LED is illuminated with different emission colors, and when the LED is illuminated with the same color emission color, the layout of the LEDs is significantly different, but the first arrangement pattern I and the second arrangement pattern II are 2, it is not necessary to provide the circuit boards exclusively.

The similar colors in the second arrangement pattern include not only one kind of color as in this embodiment but also, for example,
The colors may be similar colors such as red, orange, yellow, orange, blue, and blue green.

Further, the present invention is not limited to the layout of the first and second arrangement patterns I and II described above, but depends on the shape of the dial and the design of the dial. , II are subject to change.

In this embodiment, the LED L3 of the first arrangement pattern I is set as a light source for reducing uneven illumination of the dial 6 caused by the shadow of the light guide 15 of the light guide 14. Depending on the shape of the dial and the dial design
Illumination unevenness may be alleviated by the light sources arranged in the arrangement pattern described above, or the illumination unevenness may be alleviated by a plurality of light sources instead of one light source.

In this embodiment, the LED is used as the light source of the lighting device. However, the same effects as those of the present invention can be obtained by using a lighting device in which a color cap is attached to a bulb, for example.

Further, in the present embodiment, the lighting device of the instrument for a vehicle has been described as an example. However, the present invention is not limited to the above embodiment, and may be applied to a lighting device such as a clock.

In the present embodiment, the LE on the circuit board 2 is used.
Although a structure in which D is provided is adopted, for example, a flexible printed circuit board (circuit board) is provided on the outer bottom surface of the case body, and a bulb is mounted from the bottom surface of the case body via the flexible printed circuit board. It may have a structure.

[0035]

According to the present invention, there are provided a display panel having translucent display indices such as characters, numerals, and scales, a pointer for indicating the display indices, and a light guide disposed behind the display panel. A lighting device for illuminating the display panel and the pointer by a light source disposed behind the light guide, wherein each of the transmission spectra of the display panel and the pointer matches the respective transmission spectrum of the display panel and the pointer .
From multiple light emitting diodes with different emission spectra.
A first arrangement pattern for illuminating the display board and the hands with light sources of different colors on the circuit board, and the display board and the hands are substantially the same. A lighting device provided with a second arrangement pattern for illuminating with a color light source. In a lighting device in which the display plates have the same shape, and the display plates have a display form similar in design, a single circuit board is used. it can be obtained illumination of the various light emission patterns of the display panel and guidelines.

Further, since the LED has a narrow emission wavelength range, LE is used when the display index and the pointer on the display panel are illuminated with different emission colors and when the LED is illuminated with the same color emission color.
The layout of D will be significantly different,
By providing the arrangement pattern and the second arrangement pattern on the circuit board, in a lighting device having the same display panel shape and the display panel having a display form similar in design, one circuit board Not only can obtain various light emission patterns on the display panel and the pointer, but also can simplify the design of the circuit board, and since only one type of circuit board is required, the number of design steps and material costs are reduced. It is possible to reduce the product cost as a lighting device.

Also, at least one of the plurality of light sources arranged in at least one of the first and second arrangement patterns has a light guide portion extending from the light guide. Since the unevenness in illumination of the display panel caused by the disposition is reduced, it is possible to uniformly illuminate the display panel.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a lighting device according to an embodiment of the present invention.

FIG. 2 is a plan view of the display panel of the embodiment.

FIG. 3 is a plan view showing the circuit board of the embodiment.

FIG. 4 is a view showing an arrangement pattern of light sources according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Case body 2 Circuit board 3 1st LED (light source) 4 2nd LED (light source) 6 Dial (display board) 7 Indicator 8 Instrument main body 11 Display index 14 Light guide 15 Light guide L1, L2, L3 , L4, L5 LED (light emitting diode)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F21V 8/00 G01D 11/00-13/28 G12B 1/00-17/08

Claims (2)

(57) [Claims] 1. A display board provided with translucent display indices such as characters, numerals, and scales, a pointer for indicating the display indices, and a display panel disposed behind the display panel for guiding light to the pointers. And a light guide disposed behind the light guide and corresponding to the respective transmission spectra of the display panel and the pointer.
A light source comprising a plurality of light emitting diodes having a spectrum, and a circuit board on which the light source is provided, and a first light source for illuminating the display board and the hands with light sources of different colors on the circuit board. An illumination device comprising: an arrangement pattern; and a second arrangement pattern for illuminating the display plate and the pointer with a light source having substantially the same color. 2. A plurality of light sources arranged in at least one of the first and second arrangement patterns.
The lighting device according to claim 1, wherein at least one light source reduces unevenness in illumination of the display panel caused by disposing a light guide portion extending from the light guide. .