JP5418781B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device mounted on, for example, an automobile or a motorcycle, and in particular, includes a display plate having a translucent display portion and a light source disposed behind the display plate, and the display portion is turned on by turning on the light source. The present invention relates to a lighting device that emits light.

  As this type of lighting device, for example, one described in Patent Document 1 below is known. This illuminating device is formed by partially extracting and printing a light-shielding layer composed of a light-transmitting substrate, a solid-screen printing layer formed on the entire back surface of the light-transmitting substrate, and the light-shielding layer. A display plate comprising a display unit and a decorative layer formed on the entire front surface of the translucent substrate, and a light source that is disposed on the back surface of the display plate and illuminates the display unit from behind.

  The display section is printed out in a shape corresponding to the scale, characters, indicators, and marks of the instrument, and emits light when the light source is turned on.

  The decorative layer is obtained by completely or partially laminating dot-like basic color layers each consisting of Y (yellow), M (magenta), C (cyan), and K (black) using an offset printing method. It represents various patterns (patterns) such as woodgrain, metal, and stone, and fine images such as photographs. These patterns and images are visually recognized by the reflection of light incident from the front side and from the display unit. It has translucency so that light can be transmitted. Thus, when the light source is turned on while the decorative layer is visible, a brightly lit display portion is clearly visible in the background made of the decorative layer, while the presence of the display portion is turned on when the light source is turned off. Less noticeable than time.

Japanese Unexamined Patent Publication No. 2000-337931 (FIG. 5)

  However, the illumination device described in Patent Document 1 has a configuration in which the display unit emits light through a pattern made of a decorative layer or a background made of an image, and thus there is a problem that the display unit is not noticeable when the light source is turned on. . Therefore, it is conceivable that the decorative layer region corresponding to the display unit is a blank region without a decorative layer, but if such a blank region is formed, the presence of the display unit becomes noticeable when the light source is turned off. There is a problem.

  Accordingly, the present invention focuses on the above-described problems, and an object of the present invention is to provide an illuminating device in which the visibility of the display unit is good when the light source is turned on and the display unit is not noticeable when the light source is turned off.

The present invention relates to a translucent substrate, a light-shielding layer formed by solid printing on the translucent substrate, a translucent display unit formed by partially extracting the light-shielding layer, and the display unit And a display board comprising a plurality of basic color dot layers including at least black and a specific basic color dot layer printed and formed so as to cover the light shielding layer, and a display unit disposed on the back of the display board from behind And a light source for illuminating, wherein the basic color dot layer has a semi-transmissive portion including only the specific basic color dot layer in a predetermined region including the display portion, and light is behind the semi-transmissive portion. A plain chromatic color layer having transparency is provided.
With this configuration, when the light source is turned on, the display unit is visually recognized through a plain region (a chromatic color layer and a semi-transmissive portion), so the visibility of the display unit is improved. The protective color effect of the layer and the smoke effect of the semi-transmissive portion can be made inconspicuous, thereby improving the display quality.

  Further, the present invention is characterized in that the specific basic color dot layer in the semi-transmissive part is formed smaller than the specific basic color dot layer outside the semi-transmissive part. Thereby, the brightness | luminance of a display part can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the visibility of a display part is favorable when the light source is turned on, and the illuminating device with which a display part is not conspicuous when the light source is turned off can be provided.

The front view of the illuminating device by the 1st Embodiment of this invention. AA sectional drawing of FIG.

  An illuminating device according to an embodiment of the present invention is incorporated in, for example, an instrument panel of a vehicle instrument, and includes a circuit board 1, a light source 2, and a display board 3 as shown in FIGS. Has been.

  The circuit board 1 is a hard single board made of, for example, a glass epoxy material, and is formed as a circuit board for driving a stepping motor for driving a pointer, a liquid crystal display panel, etc. (not shown) in a vehicle instrument. Also good.

  The light source 2 is formed of a light emitting diode mounted on the circuit board 1 and is disposed at a position corresponding to a display unit described later formed on the display panel 3.

  The display panel 3 includes a translucent substrate 31 and a printing layer including a chromatic color layer 32, a light shielding layer 33, a coloring layer 34, and a basic color dot layer 35.

  The translucent substrate 31 is made of, for example, a transparent synthetic resin, and is disposed on the front side of the light source 2 in parallel with, for example, the circuit board 1.

  Similar to the basic color dot layer 35, the chromatic color layer 32 is formed by completely or partially laminating four independent basic color dot layers of, for example, Y, M, C, and K (yellow, magenta, cyan, and black). Thus, a translucent plain region having a predetermined chromatic color (described later) is formed. The plain region can be formed by using digital printing such as screen printing, offset printing, and ink jet so as to cover at least the entire area of the display unit described later.

  The light shielding layer 33 is composed of a black layer having a light shielding property which is solidly formed by screen printing, for example, and a part thereof is partially cut out to form a display portion 36 having a light transmitting property.

  In the case of this embodiment, the display unit 36 includes a mark 36 a that forms a turn indicator design, a mark 36 b that forms a seat belt indicator design, and a mark 36 c that forms a check engine indicator design. The punched region corresponds to the shape of the marks 36a to 36c. Independent light sources 2 are provided for the number of the marks 36a to 36c, the light emission color of the light source 2 corresponding to the mark 36a is green, and the light emission color of the light source 2 corresponding to the marks 36b and 36c is red. In FIG. 1, only the mark 36a is indicated by a dotted line with an outer diameter line. Further, although not shown, the display plate 3 may be formed with a scale, an indicator for characters, etc., and a window facing the liquid crystal panel, which are directed by a pointer driven by the stepping motor.

  The colored layer 34 is made of a translucent milky white layer that is solidly formed by screen printing, for example, and covers the entire surface of the light shielding layer 33. The colored layer 34 is a base for the basic color dot layer 35.

  The basic color dot layer 35 is formed by, for example, black or white by completely or partially laminating four independent dot-shaped basic color layers composed of Y, M, C, and K (yellow, magenta, cyan, and black). It expresses a marble-like stone pattern (ground pattern) having a color tone such as orange, brown, and the like, and can be formed using digital printing such as screen printing, offset printing, and ink jet printing. The front surface of the basic color dot layer 35 is formed with a transparent protective layer that protects the surface from scratches, but is not shown.

  Among the basic color dot layers 35, the three basic color dot layers 35 of Y, M, and C (yellow, mazeda, and cyan) are not formed in the region corresponding to the display unit 36, and K (black The semi-transmissive portion 37 is formed by covering only the front surface of the chromatic color layer 32 region corresponding to the display portion 36 with only the basic color dot layer 35 formed of

  The semi-transmissive portion 37 adjusts the transmittance so that the chromatic color layer 32 is not conspicuous when external light is incident. The dot size of the specific basic color dot layer 35 constituting the semi-transmissive portion 37 is semi-transmissive. It is formed smaller than the dot size of the specific basic color dot layer 35 outside the portion 37, thereby ensuring the light emission luminance of the display portion 36.

  Here, the color setting of the chromatic color layer 32 will be described. The chromatic color layer 32 is set to a protective color that is assimilated with the tone of the stone pattern by the basic color dot layer 35 so that the presence of the display unit 36 is not noticeable when the light source 2 is turned off. In the case of this embodiment, the stone pattern has a color tone such as black, orange, brown, etc. due to the basic color dot layer 35, and thus has a color that mixes these colors.

  Specifically, the display unit 36 from the front side of the display plate 3 in a state where all the layers of the chromatic color layer 32, the light shielding layer 33, the coloring layer 34, and the basic color dot layer 35 are printed on the translucent substrate 31; Each of the predetermined regions R (see FIG. 1) having a surrounding area (not including the display unit 36) surrounding the display unit 36 and constituted by the basic color dot layer 35 and including at least the entire display unit 36 is represented by chromaticity. When the color is measured by the meter, it is desirable that the color difference of the display unit 36 with respect to the predetermined region R is within ΔE25. In the case of the present embodiment, the predetermined region R has a stone pattern, and the colorimetric value is an average value of a plurality of colorimetric points.

  As described above, in the present embodiment, the light-transmitting substrate 31, the light-shielding layer 33 that is solidly formed by printing on the light-transmitting substrate, and the light-transmitting light that is formed by partially removing the light-shielding layer 33 are formed. And a display board 3 comprising a plurality of basic color dot layers 35 including a specific basic color dot layer 35 made of at least black and printed to cover the display portion 36 and the light shielding portion 33. In the illuminating device including the light source 2 disposed behind the display panel 3 and illuminating the display unit 36 from the back, only the specific basic color dot layer 35 is provided in a predetermined region in which the basic color dot layer 35 includes the display unit 36. When the light source 2 is turned on, the display unit 36 has a solid region (chromatic color). The solid chromatic color layer 32 having light transmissivity is provided behind the semi-transmissive portion 37. Layer 32 and translucent part 37 The visibility of the display portion is improved, and when the light source is turned off, the protective color effect of the chromatic layer 32 and the smoke effect of the semi-transmissive portion 37 can be made inconspicuous, thereby improving the display quality. Can do.

  In the present embodiment, the specific basic color dot layer 35 in the semi-transmissive portion 37 is formed smaller than the specific basic color dot layer 35 outside the semi-transmissive portion 37, thereby improving the transmittance and increasing the luminance of the display portion. Can be improved.

  In this embodiment, the basic color dot layer 35 is set to four independent dot-like basic color layers. However, any combination is possible as long as it is a combination of black and at least one other color.

  In the present embodiment, a pattern, a pattern, a pattern, an image, or the like expressed by the basic color dot layer 35 is arbitrary.

DESCRIPTION OF SYMBOLS 1 Circuit board 2 Light source 3 Display board 31 Translucent board 32 Chromatic layer 33 Light-shielding layer 34 Colored layer 35 Basic color dot layer 36 Display part 36a Mark 36b Mark 36c Mark 37 Semi-transmissive part

Claims (2)

A translucent substrate, a light-shielding layer formed by printing on the translucent substrate, a translucent display unit formed by partially extracting the light-shielding layer, the display unit, and the light-shielding layer A display board comprising a plurality of basic color dot layers including a specific basic color dot layer made of at least black printed to cover a light source, and a light source disposed on the back of the display board to illuminate the display section from behind. In the illuminating device provided, the basic color dot layer has a semi-transmissive portion made only of the specific basic color dot layer in a predetermined region including the display portion, and has light transmittance behind the semi-transmissive portion. A lighting device comprising a plain chromatic layer. The lighting device according to claim 1, wherein the specific basic color dot layer in the semi-transmissive portion is formed smaller than the specific basic color dot layer outside the semi-transmissive portion.

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