JP5533697B2 - Vehicle instrument - Google Patents

Description

  The present invention relates to a vehicular instrument having a structure for guiding a light spectrum of two or more colors from a light source that emits a single wavelength spectrum to a display unit remote from the light source.

  General automotive display instruments mainly include "meters" that can continuously display status displacement such as speedometers, tachometers (engine tachometers), fuel gauges, engine cooling water thermometers, and optical status changes. It consists of “indicators” that display warnings when the target display is turned on and off and perform a warning.

  In particular, with the recent progress in driving safety technology and changes in user needs, the number of display items that need to be optically turned on and off to display the status of “meters” and “indicators” It continues to increase.

  However, the size of the display unit that can be occupied is limited, and the occupable area for the number of display items that need to be mounted is constantly short. As a result, although the minimum visibility requirements are satisfied, the optical display size of each function, which continues to be reduced in size and density, is accompanied by a line of sight for forward visibility and instrument confirmation. In a driving operation environment, it is not sufficient especially for an elderly driver who is difficult to see a small display.

  As a method for solving the above problem, in Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4, a wider area in the meter is optically combined with the optical lighting on / off display of each symbol and character. Ambient “Ambient” display that illuminates automatically provides a structure that prompts the user to be aware of changes in the instrument display even when the driver ’s line of sight is not in the meter.

  That is, when a warning content is displayed with a specific indicator, an ambient display having a wide display area emits light in a strip shape or the like, so that the driver is notified that a warning display has been made. For this ambient display, the shape of the light guide, the arrangement of the light source, the color of the light source, etc. are devised.

  Among these, Patent Document 1 provides an ambient indicator that actively emits and displays an abnormal state when the abnormal state does not occur, in addition to the concentration indicator that displays a warning of the abnormal state of each part of the vehicle. The present invention provides a vehicle display device that can recognize that each part of a vehicle is in a normal state with a sense of security.

  For this purpose, the ambient indicator is provided in the combination meter separately from the concentration indicator. When there is no abnormal display by the concentration indicator, this ambient indicator displays that fact by green light emission of each light source.

  Further, Patent Literature 2 provides a vehicular pointer instrument that can ensure good visibility of the instrument even when an abnormal condition occurs while obtaining an ambient effect. For this purpose, the scale provided on the scale plate on the display board is always lit and displayed by the light from the light-emitting diodes, and the emission color of the first part, which is the part corresponding to the scale board of the display board, is set as normal. And switching when an abnormal situation occurs.

  Thereby, even when an abnormal situation occurs, high visibility of the speedometer, that is, high readability can be ensured. Therefore, it is possible to provide a combination meter that can ensure good visibility of the speedometer that is a pointer instrument even when an abnormal state occurs.

  Japanese Patent Laid-Open No. 2004-228561 causes an ambient display unit to emit light with a light emission color that is different from that during warning or the like without using a multicolor light emitting diode or the like. Specifically, a part of the first light guide part of the light guide prism is extended to constitute a third light guide part that guides light emitted from the light source for display plate to the ambient display part.

  According to this, at the normal time, the instrument display unit and the ambient display unit can be caused to emit light emitted from the same display plate light source through the first light guide unit and the third light guide unit. Further, at the time of warning or the like, the ambient display section can be made to emit light emitted from the ambient display light source having a color different from that of the display panel light source through the second light guide section.

  Patent Document 4 provides a vehicle display device including an indicator that is easily recognized by a driver. For this purpose, the indicator display portion is formed by a light guide plate that extends from between the display plate and the facing plate and is disposed on a partial region of the display plate.

  A light emitting diode is disposed as a light source for the light guide plate on the end surface of the portion of the light guide plate that is concealed by the facing plate so that light enters the light guide plate from the end surface. The microcomputer controls the light emission of the light emitting diode according to the state of the vehicle so that the display part of the light guide plate is lit or ambient displayed. According to this, it is possible to make the driver easily recognize the state of the vehicle by causing the display portion of the light guide plate to blink or display ambient over a partial area of the display plate.

  In recent years, white LED lamps have become widespread. This uses a blue-white conversion phosphor (also called yellow phosphor) that converts blue to white, a blue-red conversion phosphor (red phosphor) that converts blue to red, and a blue-green color that converts blue to green. White light is produced by using both of the conversion phosphor (green phosphor).

JP 2002-79847 A JP 2007-155613 A JP 2010-223826 A JP 2010-266409 A

  However, in the normal display and the ambient display, which require different display colors, it is necessary to isolate the optical light guide structure to prevent mutual color mixing, resulting in an increase in cost due to mutual isolation of components. In addition, there is a phenomenon in which the dead space due to the mutual isolation of the components obstructs the degree of freedom in arrangement of the graphic design and allows the mutual color mixture.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to provide a light-shielding wall for preventing optical interference between at least two color display portions, and an optical It is an object of the present invention to provide a vehicular instrument that eliminates the need for an optical interference prevention prism and the like, thereby preventing optical interference such as color mixing between display portions and light leakage with little dead space.

  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 invention according to claim 1, in the vehicle instrument having a plurality of adjacent display parts on the display board that are turned on and off with different emission colors, a plurality of light sources that emit different light by lighting, Is arranged in the display unit corresponding to the required color of the display unit, the light emitted from the light source is incident, and the generation unit that generates the light of the required color is mixed with the different light from the light source, generating means have a light guide path comprising a light guide or an air layer leads through, the plurality of display units, a display area which emits light when warning display, and indicator display unit comprising a plurality of indicators on the panel And the indicator display unit is provided adjacent to the display region, the indicator display unit is provided in the display region, and the display region generation unit that configures the generation unit along the shape of the display region is provided. Generated along the shape of the indicator display Indicator display generating means constituting, there are provided as the index display generating means is characterized by generating light of a different color from the generating means for the display region.

According to the present invention, the light from a plurality of light sources is mixed and then guided to the display unit through the generation unit. Therefore, the required color can be generated by the generation unit of the display unit, and the light shielding wall and the interference prevention A light guide structure for guiding light individually without interference, such as a prism, becomes unnecessary, and an extra space required for the light guide structure, that is, a dead space can be reduced. Therefore, it is possible to provide a vehicular instrument that can prevent optical interference such as color mixing between display units and light leakage at the boundary of the display unit in a state where there is little dead space. Further, it has a display area that emits light at the time of warning display, and an index display section that is formed adjacent to the display area and displays an index on the display board, but the required color can be generated by the generating means from the mixed light. Thus, optical interference such as color mixing and light leakage between the display area and the index display portion can be prevented with a small dead space. Furthermore, the display area can be made to emit light with a specific emission color by the light that has passed through the display area generating means. Further, the indicator display unit can emit light with a color tone different from the specific emission color, and even if the indicator display unit is provided in the display region, the display region and the indicator display unit can be distinguished.

According to a second aspect of the present invention, in a vehicular instrument having a plurality of adjacent display portions that are turned on and off in different emission colors on a display board, a plurality of light sources that emit different light when turned on, and each display The display unit corresponding to the required color of the unit is arranged on the display unit, and the light emitted from the light source is incident to generate light of the required color, and the display unit generates different light from the light source A plurality of display units, a display region that emits light during warning display, and an index display unit that includes a plurality of indicators on the display board. The indicator display unit is provided adjacent to the display area, and the indicator includes a plurality of numeric indicators and a plurality of scales, and the plurality of scales are between the plurality of first scales and each of the first scales. The second scale is arranged on the first scale, and the second scale is Generating means for generating a color made is provided, the display region is arranged in an arc, it is arranged a plurality of first graduation on the outer peripheral side of the display area, the first scale and the display area to emit light at the same time It is characterized by that.

According to the present invention, the light from a plurality of light sources is mixed and then guided to the display unit via the generation unit. Therefore, the required color can be generated by the generation unit of the display unit, and the light shielding wall and interference prevention can be performed. A light guide structure for guiding light individually without interference, such as a prism for use, becomes unnecessary, and an extra space required for the light guide structure, that is, a dead space can be reduced. Therefore, it is possible to provide a vehicular instrument that can prevent optical interference such as color mixing between display units and light leakage at the boundary of the display unit in a state where there is little dead space. Further, it has a display area that emits light at the time of warning display, and an index display section that is formed adjacent to the display area and displays an index on the display board, but the required color can be generated by the generating means from the mixed light. Thus, optical interference such as color mixing and light leakage between the display area and the index display portion can be prevented with a small dead space. Further, since the first scale can emit light with a color different from that of the second scale and the first scale is arranged on the outer peripheral side of the arc-shaped display area, the display is displayed when the display area emits light. An eyelash-like display form can be formed by the area and the first scale, and the alerting action is large.

According to a third aspect of the present invention, the surface of the display region filter is covered with a smoke layer.
According to the present invention, when the display area filter is not emitting light, the display area can be made difficult to be visually recognized by the driver by the smoke layer.

The invention described in claim 4 is characterized in that a light-shielding portion that covers the boundary is provided at the boundary between the display portions.

  According to this invention, since the light shielding portion is provided at the boundary, even if the display portions overlap each other, the overlapping portion can be covered with the light shielding portion, thereby preventing optical interference and color mixing between the display portions. it can.

In the invention described in claim 5 , the light source generates red light and blue light, and the generating means has a blue-white conversion phosphor that converts blue light into white light and transmits red light. It is said.

  According to the present invention, when the light source generates blue light, the display unit emits white light, and when the light source generates blue light and red light, the display unit emits red light (pink). it can.

The invention according to claim 6 is characterized in that the light source is provided with a red filter that generates red light and blue light and transmits red light and does not transmit blue light as the generating means. .

  According to the present invention, when only blue light is lit, the red filter does not transmit blue light, so the display unit does not emit light, and the display unit emits red light when the light source generates red light. A display portion suitable for alerting can be formed.

The invention according to claim 7 is characterized in that the light source is provided with a blue filter that generates red light and blue light, transmits blue light, and does not transmit red light as generation means. .

  According to the present invention, when only blue light is lit, the blue filter transmits blue light, so that the display unit emits blue light, and the blue light is emitted when the light source generates blue light and red light. A display portion which transmits light and emits light in blue can be formed.

In the invention according to claim 8 , the light source generates red light and blue light, and has a blue-white conversion phosphor that converts blue light into white light as a generation unit, and the light source side of the blue-white conversion phosphor In addition, a blue filter that transmits blue light and does not transmit red light is provided.

  According to this invention, when the light source emits only blue light, the display unit displays white, and even when the light source emits red light and blue light, the red light is not transmitted through the blue filter. The white color of the display portion can be maintained.

The invention according to claim 9 is characterized in that the light source generates red light and blue light, and a blue-red conversion phosphor for converting the blue light into red light is provided as the generating means.

  According to the present invention, when the light source emits only blue light, it emits red light, and when the light source emits both red light and blue light, the blue light is converted into red light and the light from the light source. Since the red light passes through the blue-red conversion phosphor, a vehicle instrument having a display unit that strongly emits red light can be obtained.

It is a front view which shows the change of the light emission state of the display board in the vehicle instrument panel in 1st Embodiment of this invention. FIG. 4 is a light source arrangement diagram when the light guide path in the vehicle instrument showing the arrangement shape of a plurality of light sources and reflection walls of the vehicle instrument of the embodiment is viewed from the direction of arrows Z2-Z2 in FIG. FIG. 3 is a schematic cross-sectional view along the arrow Z3-Z3 line in FIG. 2. It is a model expanded sectional view of the display board which follows the arrow Z4-Z4 line | wire of FIG. It is a table | surface which shows the lighting state of the light source explaining the operation | movement of the said 1st Embodiment, and the light emission state of each display part. It is a schematic explanatory drawing which shows the comparative example with respect to the said embodiment, and shows the dimension of the boundary part between the conventional display parts. It is a front view of the display board which shows 2nd Embodiment of this invention. It is a model expanded sectional view of the display board which follows the arrow Z8-Z8 line | wire of FIG. It is a table | surface for demonstrating the state of each display part with respect to the state of the several light source of the said 2nd Embodiment. It is a front view of the meter for vehicles which consists of a speedometer and a tachometer which show a 3rd embodiment of the present invention. It is a front view of the instrument for vehicles which shows the state by which ambient display was made in FIG. FIG. 2 is a partially enlarged view of a portion Z12 where a numerical index and a scale in the portion (b) of FIG. 1 are located.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a front view showing a display panel of a vehicle instrument panel according to the first embodiment of the present invention. Part (a) of FIG. 1 shows a display state in a normal state, and (b) of FIG. 1 shows an ambient display state when the indicator is activated.

  FIG. 2 is a light source arrangement diagram when the light guide path in the vehicle instrument showing the arrangement shape of the plurality of light sources and reflection walls of the vehicle instrument of the above embodiment is viewed from the direction of arrows Z2-Z2 in FIG. In FIG. 2, pointers and indicators that are not originally visible are virtually displayed so as to overlap the arrangement of the light sources on the circuit board. Further, the display board 5 and a part of the case member are removed except for the cap portion of the pointer 6 for illustration. FIG. 3 is a schematic cross-sectional view along the arrow Z3-Z3 line of FIG.

  FIG. 4 is a schematic enlarged cross-sectional view along the arrow Z4-Z4 line of FIG. FIG. 4 shows the scale in a free state. FIG. 5 is a table showing the lighting state of the light source and the light emission state of each display unit, explaining the operation of the first embodiment. FIG. 6 is a schematic configuration diagram of a light shielding wall showing a comparative example.

  In FIG. 1, the speedometer that is the vehicle instrument 1 usually emits light such as the scale 2 and the numerical index 3 mainly in blue. In this way, ambient display is performed adjacent to the display unit that emits light mainly in blue, or enveloping the display unit that emits blue light, and emitting attention by emitting light in red. In this embodiment, the ambient display area 4 in which ambient display is performed performs light emission display in synchronization with the time when an indicator (not shown) (for example, equivalent to the indicator 35 in FIG. 10) emits light.

  As shown in FIG. 3, the pointer 6 is rotatable on the surface side (driver side) of the translucent display board 5 made of a polycarbonate sheet or an acrylic resin sheet. A circuit board 7 is provided on the rear surface side (vehicle traveling direction side) of the display board 5 as shown in FIGS.

  As shown in FIG. 2, the circuit board 7 has three red light sources 8a, 8b and 8c (typically called red light sources 8) made of light emitting diodes (also referred to as LEDs), and a blue light source 9a also made of light emitting diodes. , 9b, 9c, 9d (typically referred to as blue light source 9).

  As shown in FIG. 3, a gap 11 is provided between the display board 5 and the circuit board 7. Above the gap 11 (on the side of the pointer 6), a light guide made of a transparent resin material constituting the reflection wall 12 and the light guide path 13 made of a case member of the instrument is provided. In addition, although this light guide path 13 is comprised from the light guide prism, there may be no members, such as resin, and a simple air layer may be sufficient as it.

  A plurality of colors (red and blue) from the plurality of light sources 8 and 9 (FIG. 2) are mixed in the light guide 13 made of the resin material or the light guide 13 made of an air layer. Then, the mixed light reaches the back surface of the display plate 5. When the plurality of light sources 8 and 9 do not emit light and only the red or blue light source (8 or 9) emits light, single color light reaches the back surface of the display panel 5. The pointer 6 is driven by a pointer shaft 6a, and the pointer shaft 6a is driven by a pointer driving movement 6b such as a step motor. Reference numeral 15 denotes a pointer illumination light source.

  In FIG. 1, a scale 2, a numerical index 3, and a unit 16 are printed on the display board 5. In addition, an ambient display area 4 is set in an arc shape so as to bridge or wrap the plurality of scales 2.

  Ambient display filters 20 and 21 shown in FIG. 4 are formed on the display board 5 so as to overlap the ambient display area 4. The ambient display filters 20 and 21 are composed of a red filter 20 that transmits red light and does not transmit blue light.

  The red filter 20 serving as the ambient display filters 20 and 21 that define the ambient display region 4 is formed of a red ink layer printed on a polycarbonate sheet serving as the base material 5 a of the display plate 5. A smoke layer 21 is formed on the surface side of the red filter 20, that is, on the driver side (upper side in FIG. 4).

  The smoke layer 21 is composed of a smoke ink layer. When the light from the light source 8 does not come due to the presence of the smoke layer 21, the ambient display area 4 is difficult to see with external light from the outside of the vehicle. Note that the smoke layer 21 can be omitted.

  In FIG. 1, the scale 2 is composed of a blue filter 2a (FIG. 4) printed with a blue ink layer that forms a filter for the indicator display section. The numerical index portion 3a (FIG. 4) of the numerical index 3 representing the number “2” in the display of “20” of the numerical index 3 (FIG. 1) is also composed of a blue filter 3b printed with a blue ink layer. ing. The blue filter 3b transmits blue light from the blue light source 9, and does not transmit red light from the red light source 8.

  Printing is performed with black ink on the boundary portions of the respective display portions, that is, the boundary portion 22 between the scale 2 and the ambient display region 4, the number indicator portion 3 a representing the number “2”, and the boundary portion 24 of the ambient display region 4. A black ink layer is formed. This black ink layer defines a light shielding portion.

  A shading portion for graphic formation is formed of a black ink printing layer at the inner peripheral side boundary portion 25 of the arc-shaped (fan-shaped) ambient display region 4. In this way, the plurality of display portions are arranged adjacent to each other, and a black ink layer that forms boundary portions (light shielding portions) 22, 24, 25, and 26 is formed between the display portions. 4a in FIG. 4 is a part of the ambient display area 4. In the ambient display areas 4 and 4a, at least a part of the numerical index display portion 3b is present.

  Further, the light sources 8 and 9 that generally emit a single-wavelength spectrum are formed by the LEDs that form the light sources 8 and 9 for red light and blue light. Between the light sources 8 and 9 and the display panel 5, a light shielding wall (light shielding wall 29 described later with reference to FIG. 6) made of a material that does not transmit light from the light sources 8 and 9 is not disposed.

  Further, between the light sources 8 and 9 and the display plate 5, a total reflection structure on the surface of the transmission material (rough dense boundary surface) for the light rays from the light sources 8 and 9 is not arranged. Therefore, it is not necessary to form an optical light shielding wall structure for isolating the colored light between the light sources 8 and 9 and the display plate 5 as in the prior art.

  The red and blue light sources 8 and 9 are electrically turned on and off by a control device (not shown) individually according to the situation. In the graphic such as the scale 2 and the numerical index 3 that are normally illuminated in blue, the blue filters 2a and 3b made of a blue ink layer that is a filter that transmits the blue single wavelength spectrum and shields the red single wavelength spectrum. (FIG. 4) exists.

  Next, the operation of the first embodiment configured as described above will be described with reference to the table of FIG. FIG. 5 is a table for explaining the state of each display unit with respect to the state of the plurality of light sources 8 and 9 according to the first embodiment. First, the ambient display areas 4 and 4a in FIG. 4 will be described.

  In the ambient display areas 4 and 4a, as described above, the ambient display filters 20 and 21 are provided on the front surface side of the display board 5, and this includes the red filter 20 made of a red ink layer and the smoke layer 21. .

  Therefore, as indicated by number 1 in FIG. 5, in a state where the blue light source 9 is turned on (ON) and the red light source 8 is turned off (OFF), the light from the blue light source does not pass through the red filter 20, The ambient display area 4 is turned off.

  On the other hand, the scale 2, the number index 3, and the index display units 2, 3, 16 (FIG. 1) of the unit 16 are blue filters, so the scale 2, the number index 3, and the unit 16 are the numbers in FIG. As in 5, it transmits blue light. Therefore, the scale 2, the numerical index 3, and the unit 16 in the index display portion are shined blue.

  Next, in the state where the blue light source 9 is turned on and the red light source 8 is also turned on as indicated by number 2, the light from the red light source 8 is transmitted through the red filter 20 of the ambient display filters 20, 21; The ambient display area 4 emits red light as indicated by numeral 2 in FIG.

  Moreover, since the scale 2, the number index 3, and the index display units 2, 3, and 16 of the unit 16 use a blue filter, they block red light and transmit only blue light. Accordingly, the scale 2, the numerical index 3, and the unit 16 emit blue light as indicated by numeral 6 in FIG.

  Next, in the state where the blue light source 9 is turned off and the red light source 8 is also turned off as indicated by number 3, the ambient display area 4 is turned off. Further, as indicated by reference numeral 7, the scale 2, the numerical index 3, and the unit 16 are also turned off, and no transmitted illumination is performed.

  Next, when the blue light source 9 is turned off and the red light source 8 is turned on as indicated by numbers 4 and 8, light from the red light source 8 is transmitted through the red filters 20 of the ambient display filters 20 and 21. The ambient display area 4 emits red light. The scale 2, the numerical index 3, and the unit 16 are turned off without emitting light because a blue filter is used and red light is absorbed.

  FIG. 6 is a schematic explanatory view showing a comparative example and showing dimensions of a boundary portion between conventional display portions. Between the first display portion R1 and the second display portion R2, there is a resin light-shielding wall 29 made of a meter case. Therefore, the arrows Y61 provided individually on the first and second display portions R1 and R2, respectively. , Y62 can prevent the light from the light source from interfering without entering the adjacent area. However, it is necessary to secure a dead space DS between the display units of at least about 3 mm.

  In this regard, in the first embodiment, as shown in FIG. 4, the number index portion 3 a representing the number “2” in the display of the number index “20” is configured by the blue filter 3 b. In addition, the ambient display filters 20 and 21 include a red filter 20 printed on the base material 5 a of the display board 5. It is not necessary to provide a light shielding wall 29 (FIG. 6) corresponding to the meter case between the display units, and the two display units can be made as close as possible, so a minimum dead space of about 0.5 mm is sufficient. .

  As described above, in the first embodiment, light having a plurality of single-wavelength spectrums using a light source such as an LED (light emitting diode) once mixed in the light guide 13 (FIG. 3) is a filter corresponding to the wavelength. By being filtered, it can be separated into light for each wavelength. In a vehicle instrument having a plurality of display units that need to be individually turned on and off with different emission colors, display units with at least two display colors can be arranged without color mixing.

  With such a structure for performing mixed propagation and re-separation, the optical part using the total reflection of the light shielding wall 29 (FIG. 6) or the light shielding prism or the like for preventing optical interference between the display parts of at least two colors. A special light-shielding wall is unnecessary. Therefore, a large dead space DS (FIG. 6) is not required, and optical interference such as color mixing between display portions and light leakage can be prevented.

  Further, in the first embodiment, a black ink layer printed with black ink is formed like the boundary portions (light shielding portions) 22 and 24 of the ambient display region 4 in FIG. The reason for this is as follows. In the boundary portions (light-shielding portions) 22, 24, 25, and 26 of the red and blue display portions, it is difficult to set a boundary at which red and blue are clearly separated.

  That is, the position of the display unit is shifted due to the dimensional deviation. Then, red and blue overlap and become purple. Such purple color is unnecessary. Therefore, a black and white ink layer serving as a dead space is disposed in the overlapping portion. That is, the color deviation is covered with the black ink layer. Thereby, it is possible to switch the display of two or more colors with a minimum dead space.

(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. 7 is a front view of a display board showing a second embodiment of the present invention.

  FIG. 8 is a schematic cross-sectional view along the arrow Z8-Z8 line of FIG. The scale of FIG. 8 is illustrated in a free state. FIG. 8 is a configuration along the arrow Z8-Z8 line of FIG. 7, but does not show an accurate cross section. It is schematically shown so that the configuration of each representative part can be understood.

  In FIG. 8, on the surface side of the display board 5, that is, on the driver side of the driver's seat (left side in FIG. 8), first, the light emission of the scale 2 (FIG. 7) of the number “100” constituting the number index 3 is controlled. For this purpose, a layer of blue-white conversion phosphor 30 that converts the spectrum of blue light into white light is formed on the base material 5a of the display panel 5. The blue-white conversion phosphor 30 emits white light when the blue light source 9 is turned on, and transmits red light and emits red light (pink) when both the red light source 8 and the blue light source 9 are turned on.

  Next, the ambient display area 4 exists in the lower part of FIG. The ambient display filters 20 and 21 that define the ambient display region 4 include a red filter (red ink layer) 20 printed on the substrate 5 a of the display plate 5 and a smoke layer 21.

  The smoke layer 21 is composed of a smoke ink layer. When the light from the light sources 8 and 9 does not come due to the presence of the smoke layer 21, the ambient display area 4 is difficult to see with external light from the outside of the vehicle.

  In the lower part of the next, there is a part of “0” of the number “100” of the numerical index 3. The numerical index display filter 23 that defines the numerical index 3 is formed of a blue ink layer printed on the base material 5 a of the display plate 5. The ambient display area 4a exists again in the lower part of the next. The filters that define the ambient display area 4a are the same as the ambient display filters 20 and 21 described above.

  On the next lower side, a shading portion (boundary portion) 26 for graphic formation is formed. A black ink layer printed with black ink is formed in these boundary portions (light shielding portions) 22, 24, 25, 26, 27, and 28. Further below that, there is an indicator display unit representing the unit 16 described as “km / h”. In the index display unit representing the unit 16, a blue-white conversion phosphor 32 that converts a blue spectrum into white light is formed on the surface side of a blue filter 31 made of a blue ink layer.

  Although not shown in FIG. 8, light sources 8 and 9 that radiate a substantially single wavelength spectrum, such as blue and red LEDs, are provided in the back of the back surface. Between this light source 8 and 9 and the display board 5, the part (FIG. 6) equivalent to the light-shielding wall 29 which consists of the opaque material with respect to the light from the light sources 8 and 9 is not arrange | positioned. Further, between the light sources 8 and 9 and the display plate 5, a light shielding wall using total reflection with respect to the light rays from the light sources 8 and 9 is not arranged. Therefore, it is not necessary to form an optical shielding structure that causes a dead space expansion between the light sources 8 and 9 and the display panel 5 as in the prior art.

  Next, the operation of the second embodiment configured as described above will be described based on the table shown in FIG. FIG. 9 is a table for explaining the state of each display unit with respect to the state of the plurality of light sources 8 and 9 in the second embodiment.

  In the table of FIG. 9, each display unit is displayed from the top, an index display unit displaying the scale 2 of the numeral “100” of the numeral index of FIG. 7, the ambient display areas 4 and 4 a, and the numeral “100” of the numeral index. The table is created in the order of the index display section, the index display section representing the unit 16 described as “km / h”. And it shows how the light emission state of each display part becomes according to lighting and extinction of LED used as the red and blue light sources 8 and 9. FIG.

  In FIG. 9, first, an index display unit that displays the scale 2 of the number “100” will be described. As described above, a layer of blue-white conversion phosphor 30 that converts the spectrum of blue light into white light is formed on the base material 5a of the display board 5 in the index display unit that displays the scale 2. . Therefore, as indicated by number 1 in the table of FIG. 9, when the blue light source 9 is turned on (ON) and the red light source 8 is turned off (OFF), the indicator display unit for displaying the scale 2 is white. Emits light.

  In addition, in the state where the blue light source 9 is turned on and the red light source 8 is also turned on as indicated by the number 2, the index display unit for displaying the scale 2 is converted by the blue-white conversion phosphor 30 to convert blue into white. In order to transmit red light, light is emitted in red (pink). Moreover, in the state where the blue light source 9 is turned off and the red light source 8 is also turned off as indicated by the number 3, the indicator display unit for displaying the scale 2 is turned off.

  Further, as indicated by the number 4, in the state where the blue light source 9 is OFF and the red light source 8 is ON, the indicator display unit that displays the scale 2 transmits red light through the blue-white conversion phosphor 30. Emits red light.

  As described above, the index display unit that displays the scale 2 is white in the normal display state and red in the ambient light emission display state, so that the blue spectrum is converted to white in the region and the red spectrum is displayed. The blue-white conversion phosphor 30 that transmits light is disposed.

  Next, the ambient display filters 20, 21 (FIG. 8) that define the ambient display region 4 include a red filter (red ink layer) 20 printed on the base material 5 a of the display board 5 and a smoke layer 21. Note that the smoke layer 21 can be omitted.

  When the blue light source 9 is turned on (ON) and the red light source 8 is turned off (OFF) as indicated by number 5 in FIG. 9, the red filter blocks blue light, so the ambient display area 4 is turned off. doing. Further, as indicated by the number 6, in the state where the blue light source 9 is ON and the red light source 8 is also ON, the ambient display area 4 emits red light and performs ambient display.

  In addition, in the state where the blue light source 9 is turned off and the red light source 8 is also turned off as indicated by number 7, the ambient display area 4 is turned off. In addition, in the state where the blue light source 9 is turned off and the red light source 8 is turned on as indicated by number 8, the ambient display area 4 emits red light.

  Next, the index display filter 23 (FIG. 8) that defines the number index display portion for displaying the number “100” of the number index 3 is formed of a blue ink layer printed on the substrate 5 a. Accordingly, in the state where the blue light source 9 is turned on (ON) and the red light source 8 is turned off (OFF) as indicated by the number 9, the number indicator display unit 3a displaying the number “100” emits blue light. .

  In addition, when the blue light source 9 is turned on and the red light source 8 is also turned on as indicated by reference numeral 10, the index display unit displaying the number “100” transmits only blue light, and thus emits light in blue. In addition, in the state where the blue light source 9 is turned off and the red light source 8 is also turned off as indicated by number 11, the indicator display unit displaying the number “100” is turned off.

  In addition, when the blue light source 9 is turned off and the red light source 8 is turned on as indicated by number 12, the blue ink layer does not transmit red, and therefore the index display unit displaying the number “100” is turned off. ing.

  Next, the index display filter that defines the index display unit representing the unit 16 of “km / h” is the surface side of the blue filter (blue ink layer) 31 printed on the substrate 5a as shown in FIG. In addition, a layer of blue-white conversion phosphor 32 that converts the blue spectrum into white light is formed.

  Accordingly, when the blue light source 9 is turned on (ON) and the red light source 8 is turned off (OFF) as indicated by reference numeral 13 in FIG. 9, the blue light passes through the blue ink layer 31 and is converted into blue-white converted fluorescence. Since it is converted into white light by the body 32, the indicator display unit for displaying the unit 16 emits white light.

  Further, as indicated by reference numeral 14, when the blue light source 9 is turned on and the red light source 8 is also turned on, the index display unit representing the unit 16 of “km / h” has the blue filter (blue ink layer) 31. The red light is blocked, and the blue-white conversion phosphor 32 is converted into white through only blue light, and thus emits white light.

  Further, as indicated by the number 15, in the state where the blue light source 9 is turned off and the red light source 8 is also turned off, the indicator display unit for displaying the unit 16 is turned off. In addition, when the blue light source 9 is turned off and the red light source 8 is turned on as indicated by the number 16, the blue filter blocks red light, and thus the indicator display unit for displaying the unit 16 is turned off. . Thus, when the indicator display filter that defines the indicator display unit representing the unit 16 of “km / h” emits light, it is always white.

(Third embodiment)
Next, a third embodiment of the present invention will be described. Features different from the above-described embodiment will be described. In the third embodiment, a tachometer is added, and the concept of the second embodiment is applied except for the display form of the red zone and the ambient display form.

  FIG. 10 is a front view of a vehicle instrument including a speedometer and a tachometer (engine tachometer) showing a third embodiment of the present invention. FIG. 11 is a front view of the vehicle instrument showing a state where the ambient display is made in FIG. 10. In the third embodiment, the following emission color change occurs in FIGS. 10 to 11.

  In the initial state (normal state which is a non-ambient display state), only the blue light source 9 on the back side of the display plate 5 emits light as shown in FIG. On the other hand, during ambient display in which the indicator 35 is lit, both the blue light source 9 and the red light source 8 on the back side of the display board 5 emit light.

  First, the scale 2 includes a main scale 2ma corresponding to the center of the numerical index and an auxiliary scale 2au located between the main scales 2ma. In the initial state, the main scale 2ma and the auxiliary scale 2au are provided. However, both emit light in white as in the right speedometer of FIG. In the ambient display state, the auxiliary scale 2au remains white, and only the main scale 2ma emits red light.

  The reason for this is as follows. The auxiliary scale 2au is in the state of numbers 13 and 14 in FIG. In the display part of the auxiliary scale 2au, a blue filter (blue ink layer) 31 is printed on the substrate 5a, and a layer of blue-white conversion phosphor 32 for converting the blue spectrum into white light is formed on the surface side. ing. Therefore, as long as the blue light source 9 is lit, the auxiliary scale 2au is lit white.

  The main scale 2ma is the state of numbers 1 and 2 in FIG. The display unit of the main scale 2ma is provided with a blue-white conversion phosphor 30 that changes blue to white. When only the blue light source 9 emits light, the main scale 2ma emits white light.

  When both the red light source 8 and the blue light source 9 shine, red light is transmitted through the blue-white conversion phosphor 30 shining white, so that the main scale 2ma changes to red (pink). That is, the blue-white conversion phosphor 30 (fluorescent pigment) does not react with the red light, and the red light is transmitted as it is, so the blue-white conversion phosphor 30 that has been shining white changes to red (pink).

  Second, an arc-shaped ambient display area 4 is set at a position where the numerical indices 3 are bridged. The ambient display area 4 is in the states of numbers 5 and 6 in FIG. In the initial state (normal display state), only the blue light source 9 is turned on, and the ambient display area 4 is turned off as shown in FIG. In the ambient display state where both the red light source 8 and the blue light source 9 shine, the ambient display area 4 emits red light in a band shape as shown in FIG.

  Third, in the initial state (normal display state), the arcuate contour 2d (FIG. 10) on the outer periphery of the scale 2 emits white light, and even in the ambient display state of FIG. 11, it emits white light. The reason for this is as follows. The arcuate contour 2d on the outer periphery of the scale 2 is in the state of numbers 13 and 14 in FIG. A blue-white conversion phosphor 32 (FIG. 8) is used for the contour 2d.

  The blue-white conversion phosphor 32 shines white, but since the blue filter (blue ink layer) 31 is provided on the back side of the blue-white conversion phosphor 32, the blue filter 31 blocks red light and blue light. Transmits only light. The transmitted blue light is converted into white light by the blue-white conversion phosphor 32.

  Fourth, in the initial state, the numerical indexes “7” and “8” indicating the red zone 41 of the tachometer 40 on the left side of FIG. doing. In the ambient display state, as shown in FIG. 11, the surroundings of the numerical indexes “7” and “8” are displayed in red in a band shape, and the numerical indexes “7” and “7” are displayed in the red ambient display area 4b. 8 "and the bar-shaped scale 41a emit strong red light.

  The reason for this is as follows. The number indicators “7” and “8” for displaying the red zone 41 of the tachometer 40 and the rod-shaped scale 41a on the outer periphery thereof are provided with blue-red conversion phosphors that emit red light when blue light is incident thereon. Yes. This state is not described in the table of FIG.

  Further, the ambient display area 4b of the tachometer 41 is in the states of numbers 5 and 6 in FIG. In other words, the ambient display area 4b for alerting is provided with a red filter that transmits the red single wavelength spectrum and shields the blue single wavelength spectrum.

  Therefore, in the state where only the first blue light source 9 is lit, the numerical indexes “7” and “8” indicating the red zone 41 of the tachometer 40 emit red light, and the bar scale 41a on the outer peripheral side emits red light. Yes. With only the blue light source 9, the ambient display area 4b is turned off.

  In the ambient display state of the tachometer 41, both the blue light source 9 and the red light source 8 are lit. Therefore, as indicated by numbers 5 and 6 in FIG. 9, the surroundings of the numerical indexes “7” and “8” are switched from the unlit state to the ambient display that shines red in a band shape.

  In this red ambient display, both the red and blue lights come to the numerical indexes “7” and “8” and the rod-shaped scale 41a on the outer peripheral side, but blue is turned red by the blue-red conversion phosphor. Since red is transmitted as it is, the numerical indexes “7” and “8” and the bar-shaped scale 41a on the outer peripheral side are switched to a state where the red color emits intensely. Therefore, the numerical display portions “7” and “8” can be visually recognized without being buried in the red ambient display area 4a.

  In addition, it is as follows when the structure and effect | action of the filter or fluorescent substance which comprise the production | generation means in said each embodiment are put together. In the following description, when numbers are used, the numbers in the table of FIG. 9 are shown. The light source generates red light and blue light.

  Like numbers 1 and 2, the generation means includes a blue-white conversion phosphor that converts blue light into white light and transmits red light. According to this, when the light source generates blue light, the display unit emits white light, and when the light source generates blue light and red light, the display unit can emit red light (pink). .

  Like the numbers 5 and 6, a red filter that transmits red light and does not transmit blue light is provided as a generation unit. According to this, when only blue light is lit, the red filter does not transmit blue light, the display unit does not emit light, and the display unit emits red light when the light source generates red light. A display portion suitable for arousal can be formed.

  Like numbers 9 and 10, a blue filter that transmits blue light and does not transmit red light is provided as a generation unit. According to this, when only blue light is lit, the blue filter transmits blue light, the display unit emits blue light, and only blue is transmitted when the light source generates blue light and red light. The display part emits light in blue.

  As shown by numbers 13 and 14, the generation means has a blue-white conversion phosphor that converts blue light into white light, and transmits blue light and does not transmit red light on the back side of the blue-white conversion phosphor. A blue filter is provided. According to this, when the light source emits only blue light, the display unit displays white, and when the light source emits red light and blue light, the red light is not transmitted through the blue filter. Part white color can be maintained.

  Next, although not shown in the table of FIG. 9, in the third embodiment, in the red ambient display area 4b, the numerical indexes “7” and “8” and the bar scale 41a emit light strongly in red. An example is shown. The numerical indexes “7” and “8” and the bar scale 41a are provided with a blue-red conversion phosphor that converts blue light into red light as a generating means.

  According to this, when the light source emits only blue light, it emits red light, and when the light source emits both red light and blue light, the blue light is converted into red light and the red light from the light source. Since the light passes through the blue-red conversion phosphor, a vehicle instrument having a display unit that strongly emits red light can be obtained.

  As described above, in the above embodiment, the light from the plurality of light sources is mixed in the light guide, and then guided to the display unit through the generation means including the color conversion phosphor or the color filter. Can be generated by the generating means of the display unit, and a light guide structure for guiding light individually without interference, such as a light shielding wall and an interference prevention prism, is not necessary. The extra space required, that is, the dead space can be reduced. Therefore, it is possible to provide a vehicular instrument that can prevent optical interference such as color mixing between display units and light leakage at the boundary of the display unit in a state where there is little dead space.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, in FIG. 1B showing the first embodiment described above, the ambient area 4 is terminated in the middle of the numerical index 3, but the width of the ambient area 4 can be arbitrarily set. FIG. 12 is a partially enlarged view of a portion Z12 corresponding to the numerical index 3 and the scale 2 in FIG.

  In FIG. 12, boundary portions (light-shielding portions) made of a black ink layer are set at the boundary portions 24 a, 24 b, 24 c between the indicator display portion made up of the number indicator 3 and the scale 2 and the ambient display area 4. That is, a light-shielding print area with black ink that shields the light-emitting display color of the display section is arranged at the boundary portions 24a, 24b, and 24c of the adjacent display sections so that the mutual printing deviations are contained in the light-shielding print area. Yes. Further, the light-shielding print area is not limited to the print layer, and an opaque film may be used. Further, instead of printing, application or spraying of colored ink may be used.

  Next, in the said embodiment, although the colored layer printed on the surface side (occupant side) of the display board 5 of a transparent polycarbonate sheet or an acrylic resin sheet is used as a filter, the colored layer printed on the back side is used as a filter. Also good.

  In addition to printing with ink, the filter and the phosphor may be formed by attaching a film or vapor-depositing the filter or the phosphor. Further, the filter and the phosphor may be present only on the back surface side of the display plate 5, or may be on both the back surface side and the front surface side.

  In the above embodiment, the blue and red generally single wavelength spectra (blue light and red light) emitted from the light source are once mixed in the light guide structure. However, a light guide structure such as a prism is not particularly provided, and a mixed state may be provided in the air layer. In other words, the light guide structure can utilize not only a structure using a light guide prism made of a transparent material such as acrylic but also an air layer propagation using only a reflective structure.

  Furthermore, the arrangement of the light sources 8 and 9 is not limited, for example, directly under the display unit, the outer periphery of the instrument visible range (indirect illumination), or the like other than the arrangement in the vicinity of the root of the pointer 6 as shown in FIG. Furthermore, if the filter arranged other than the combination of the light emission region of the substantially red spectrum and the substantially blue spectrum can shield the spectrum other than that required for the emission color of the region and transmit the required spectrum, for example, Arbitrary color combinations of three or more emission color regions obtained by adding green to red and blue as described above are also possible.

  In the above embodiment, LEDs are used as the light sources 8 and 9. An LED has a narrow spectrum and is not a single wavelength in the precise sense. However, the present invention has been introduced as a light source having a substantially single wavelength. Various light sources of substantially single wavelength other than LEDs can also be used. In addition, ultraviolet light that is invisible light may be used to cause the phosphor to emit light.

  In the above embodiment, the ambient display is performed when warning is given by the indicator on the instrument panel. Since the space on the instrument panel is limited, the display area for each warning item decreases as the number of warning items increases. Therefore, it becomes difficult for the driver to notice the warning. Therefore, the effect as a master warning for notifying the driver that some warning display has been made can be exhibited by the ambient display. It should be noted that ambient display may be performed at the time of alerting in a state where no warning display is displayed on the indicator, or the ambient display area may be blinked.

  Ambient display is performed at the time of warning display or alerting. In other words, the ambient display emits light synchronously when the warning symbol mark shines. In this case, the symbol mark display and the ambient display are synchronized, but may be slightly shifted. That is, a warning display may be performed after calling attention in the ambient display, and vice versa.

DESCRIPTION OF SYMBOLS 1 Vehicle meter 2 Scale 2, 3, 16 Index display part 2a Blue filter of scale 2 (blue ink layer)
2au Auxiliary scale 2ma Main scale 3 Number index 3a Number index section 3b Blue filter (blue ink layer) of number display section 3a
4, 4a, 4b Ambient display area 5 Display board 6 Pointer 7 Circuit board 8, 8a-8c Red light source 9, 9a-9d Blue light source 11 Crevice 12 Reflecting wall 13 Light guide (light guide)
15 Light source for pointer illumination 20, 21 Ambient display filter 20 Red filter 21 Smoke layer 22, 24, 24a to 24c, 25, 26, 27, 28 Boundary portion (light shielding portion)
23 Numerical index display filter 30, 32 Blue-white conversion phosphor 31 Blue filter used with blue-white conversion phosphor 31 35 Indicator 40 Tachometer 41 Red zone 41a Bar-shaped scale using blue-red conversion phosphor DS Dead space

Claims (9)

In a vehicle instrument having a plurality of adjacent display parts on the display board that are turned on and off with different emission colors,
Multiple light sources that emit different light when lit,
A generating unit arranged in the display unit corresponding to the required color of each of the display units, and receiving the light emitted from the light source to generate light of the required color;
Mix the different light from the light source, have a, a light guide path consisting of the light guide or an air layer leads through the generation unit on the display unit,
The plurality of display units include a display area that emits light when a warning is displayed, and an index display unit that includes a plurality of indexes on the display board, and the index display unit is provided adjacent to the display area. ,
The indicator display unit is provided in the display area,
A display area generating means that constitutes the generating means along the shape of the display area is provided,
An indicator display generating means constituting the generating means is provided along the shape of the indicator display section, and the indicator display generating means generates light having a color tone different from that of the display area generating means. Vehicle instrument to be used. In a vehicle instrument having a plurality of adjacent display parts on the display board that are turned on and off with different emission colors,
Multiple light sources that emit different light when lit,
A generating unit arranged in the display unit corresponding to the required color of each of the display units, and receiving the light emitted from the light source to generate light of the required color;
A light guide composed of a light guide or an air layer that mixes the different light from the light source and guides the light to the display unit via the generation unit;
Wherein the plurality of display units, a display area which emits light when warning display, and a indicator display unit comprising a plurality of indicia on the display panel, the indicator display unit is provided adjacent to the display area ,
The index includes a plurality of numerical indexes and a plurality of scales, and the plurality of scales includes a plurality of first scales and a second scale disposed between the first scales, and the first scale. The generating means for generating a color different from the second scale is provided,
The display area is arranged in an arc shape, and a plurality of the first scales are arranged on the outer peripheral side of the display area,
Wherein the first scale and the display area, car dual instrument you characterized in that simultaneously emit light. The vehicle instrument according to claim 1 , wherein a surface of the display area filter is covered with a smoke layer. Wherein the boundary between the display portion mutually vehicle meter according to any one of claims 1 or 2, characterized in that the light-shielding portion covering the該境eyes is provided. The light source generates red light and blue light,
The vehicular instrument according to any one of claims 1 to 4 , wherein the generation unit includes a blue-white conversion phosphor that converts blue light into white light and transmits red light. The light source generates red light and blue light,
The vehicular instrument according to any one of claims 1 to 4 , wherein a red filter that transmits red light and does not transmit blue light is provided as the generating means. The light source generates red light and blue light,
The vehicular instrument according to any one of claims 1 to 4 , wherein a blue filter that transmits blue light and does not transmit red light is provided as the generation unit. The light source generates red light and blue light,
A blue filter that has a blue-white conversion phosphor that converts blue light into white light as the generation means, and transmits blue light and does not transmit red light on the light source side of the blue-white conversion phosphor. vehicle meter according to any one of claims 1 to 4, characterized in that are provided. The light source generates red light and blue light,
The vehicular instrument according to any one of claims 1 to 4 , wherein a blue-red conversion phosphor that converts blue light into red light is provided as the generation means.

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