JP3914383B2 - Vehicle display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device for a vehicle, and more specifically, is mounted on a vehicle, transmits light emitted by lighting of a light source from the back surface of a dial plate, displays various states of the vehicle by the transmitted light, and The present invention relates to a display device for a vehicle that stops the display when a light source is turned off.
[0002]
[Prior art]
For vehicles of a particularly high grade, whether the analog or digital combination meter is used, it is a collection of meters that display various conditions such as the vehicle's running speed, engine speed, remaining fuel and coolant temperature. Regardless, for example, a so-called black face method is adopted in which the display content is in a light emitting display state in which the display content is visible while the ignition switch is on, and in the non-light emission display state so that the display content is invisible in the off state. A smoke panel with low transmittance is used as the front cover of the combination meter.
[0003]
Also, in the analog type combination meter, dials indicating the values of various states are in a light emitting display state in which the display contents are visible when the ignition switch is on, for example. Cover the surface of the dial with slit-type scales with a smoke sheet so that it is not visible, and place a pointer in front of it to place the pointer in either light-emitting display or non-light-emitting display Some have adopted a slightly different black face system that is visible.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned black face type combination meter, it is necessary to display the display with high luminance because the driver visually recognizes the display through a smoke panel having a low transmittance. Therefore, a diffusion member that diffuses light from the light source is provided on the back surface of the dial. And in order to adjust the light quantity of the light permeate | transmitted from a dial, the thickness of the diffusion plate was changed partially. For example, the brightness balance is adjusted by increasing the thickness of the diffuser plate where the luminance is high and decreasing the thickness where the luminance is low. However, in this method, the mold of the molded product diffusing member has to be corrected in order to adjust the balance of luminance, so that there is a problem that the cost of correcting the mold is large and the correction time is long. there were.
[0005]
Therefore, in view of the above-described problems, an object of the present invention is to provide a vehicular display device that can easily adjust display luminance.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the vehicle display device according to claim 1, which is mounted on a vehicle, transmits light emitted from the light source when the light source is turned on from the back surface of the dial plate, and transmits various light of the vehicle by the transmitted light. In a display device for a vehicle that makes the display of the state visible and makes the display invisible by turning off the light source, it is detachably provided on the back side of the dial so that the brightness of the display becomes uniform. A thin plate-shaped adjusting member that adjusts the amount of transmitted light that passes through the dial, and the adjusting member is provided on at least one of the surface facing the light source or the surface facing the surface with the light source. The light guide member is dot-printed so that the transmission amount decreases as it is closer, and the dots printed by the dot printing shadow the surface of the dial between the adjustment member and the dial. As the gap to prevent the ringing projected occurs, characterized in that providing the adjustment member.
[0007]
According to the vehicle display device of the present invention described in claim 1, the adjustment member formed to be detachable is provided on the back side of the dial. The light emitted by turning on the light source is transmitted from the dial as transmitted light having a transmission amount adjusted by the adjustment member. Therefore, since the display brightness in the vehicle display device is adjusted to be uniform by the adjustment member, it is possible to prevent the brightness in the vicinity of the light source from being increased even when a high brightness light source is used. In addition, even if brightness adjustment, correction, etc. occur, the adjustment member is detachably provided on the back side of the dial, so it can be replaced with an adjustment member that has been adjusted, corrected, etc. Since correction and the like can be easily performed, it is possible to shorten the time required for adjusting and changing the luminance. Therefore, the balance of display luminance in the vehicle display device can be easily adjusted.
[0009]
In addition, dot printing on the adjustment member is performed by increasing the number of dots in the vicinity of the light source and printing densely, and by increasing the distance from the light source, the number of dots is decreased and printed roughly. And an adjustment member is provided in the back surface side of a dial so that a dense part of the number of dots may oppose a light source. Therefore, by using dot printing for the adjustment member, the number of dots near the light source of the adjustment member can be made dense, and printing with a coarser dot number as the distance from the light source can be easily performed. The number of dots can be printed according to a subtle change in the amount of transmitted light transmitted. Further, since the adjustment member is detachable from the dial, even if correction or change occurs, it can be easily handled by dot printing. Therefore, it is possible to finely adjust the balance of display luminance in the vehicle display device.
[0011]
Further, when the adjustment member is provided so that a gap is generated between the adjustment member and the dial, the gap functions as an air layer. The light emitted from the light source is diffused by the adjusting member, further diffused by the air layer, and transmitted to the dial. As a result, the amount of transmitted light transmitted through the dial is increased. . Therefore, by interposing an air layer between the adjusting member and the dial, light is diffused in the air layer, so that the amount of transmitted light transmitted through the dial is increased, and display with high brightness is performed. It can be performed. Even if a high-luminance light source is used, it is possible to prevent the dots printed on the adjustment member from appearing as shadows on the surface of the dial by providing an air layer that diffuses light. Therefore, in a black face type combination meter or the like, display with high luminance can be performed without impairing the beauty.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a display device for a vehicle according to the present invention will be described with reference to the drawings of FIGS.
Here, FIG. 1 is an exploded perspective view of the vehicular display device according to the present invention, and FIG. 2 is a view showing a cross section of the vehicular display device after assembling through the straight line AA of FIG.
[0013]
The vehicle display device 1 according to the present invention of the above-described combination meter includes a movement 10, a dial 20, a pointer 30, an adjustment member 40, a light source 50, and the like, as shown in FIGS. Is configured. In addition, in FIG. 1, the speedometer is shown among the meter and gauge of a combination meter as the display apparatus 1 for vehicles.
[0014]
The movement 10 is connected to a measurement unit or the like mounted on the vehicle, and includes an output shaft 11 that rotates according to the measurement amount of these measurement units. This movement 10 is a terminal pin formed in a coil spring shape by spirally winding a conductive metal thin wire and a printed circuit board 60 accommodated in an instrument case forming the outline of a vehicle combination meter. 61 and the like are electrically connected. The movement 10 also includes a screw hole 12 into which the screw 70 is screwed.
[0015]
The dial plate 20 is formed in a plate shape having a scale 21 on the surface, and is provided with a through hole 22 through which the output shaft 11 can pass, a vicinity of the through hole 22, and a screw 70 passing therethrough. The screw through hole 23 which can be formed is provided. The pointer 30 includes a base portion 31 attached to the output shaft 11 of the movement 10 and an instruction portion 32 extending from the base portion 31 in one direction. At least the instruction unit 32 of the pointer 30 is made of a light guide material.
[0016]
The adjustment member 40 disposed on the back side of the dial plate 20 is formed of a thin light guide member formed of an acrylic resin, a polycarbonate resin, or the like that is separate from the dial plate 20. And light is incident from the light source 50 accommodated in the instrument case or the like and fixed to a mounting hole (not shown) of the printed circuit board 60, and the light incident from the light source 50 is divided into the scale 21 and the pointer 30. Lead to at least one to make it shine. The adjustment member 40 includes a through hole 41 through which the output shaft 11 of the movement 10 can pass, a screw through hole 42 provided in the vicinity of the through hole 41, and a liquid crystal display panel that displays a travel distance and the like. And a liquid crystal display panel exposure window that can pass through.
[0017]
A convex portion 43 is formed on the periphery of the surface of the adjustment member 40 facing the dial plate 20. When the dial plate 20 and the adjustment member 40 are assembled so that the convex portion 43 and the dial plate 20 are in contact with each other, There is a gap in the gap. By forming a gap between the dial 20 and the adjustment member 40 in this way, this gap becomes the air layer 80, and the light emitted from the light source 50 is diffused also in the air layer 80.
[0018]
Further, on the back surface of the adjustment member 40 facing the light source 50, a dot printing unit for adjusting the amount of transmitted light transmitted through the dial plate 20 so that the display brightness in the vehicle display device 1 is uniform. 44 is provided. In the dot printing unit 44, for example, a blue ink circle is printed. In the vicinity of the light source 50, printing is performed so that the number of dots is increased to be dense, and as the distance from the light source 50 is increased, the number of dots is decreased to be coarse. In addition, about the printing of the dot printing part 44, the shape of a dot, a color, etc. are not specifically limited.
[0019]
Thus, by appropriately changing the number of dots depending on the location of the dot printing unit 44, the amount of transmitted light transmitted from the adjustment member 40 near the light source 50 having a large number of dots to the dial plate 20 is reduced, and from the light source 50. Since the amount of transmitted light transmitted from the adjustment member 40 to the dial plate 20 increases as the number of dots decreases, the transmitted light transmitted through the dial plate 20 is adjusted by adjusting the number of dots of the dot printing unit 44. Can be adjusted.
[0020]
Next, assembly of the vehicle display device 1 will be described.
In the vehicle display device 1 of the combination meter having the above-described configuration, the dial plate 20 is stacked so as to be in contact with the convex portion 43 of the adjustment member 40, the movement 10 is disposed on the back side of the adjustment member 40, and the output shaft 11 passes through the output shaft 11. The dial 20 is protruded from the surface side of the dial 20 through the holes 44 and 22. Then, a pointer 30 is attached to the tip of the output shaft 11. Furthermore, the screw 70 is screwed into the screw hole 12 of the movement 10 from the surface side of the dial 20 through the screw through holes 23 and 42, and the dial 10, the adjusting member 40, and the movement 10 are fixed to each other.
[0021]
Next, an example of illumination according to the present embodiment when the vehicular display device 1 having the above-described configuration is applied to the above-described black-face type combination meter will be described below.
[0022]
When the ignition switch of the vehicle is turned on and power is supplied to the vehicle display device 1, the light source 50 is turned on. Then, the light emitted from the light source 50 incident on the adjustment member 40 is adjusted by the dot printing unit 44. That is, since the dots of the dot printing unit 44 close to the light source 50 are dense, the light reflected by the dot printing unit 44 and incident on the adjustment member 40 is reduced. Further, as the distance from the light source 50 increases, the dots of the dot printing unit 44 become rougher, so that the light reflected by the dot printing unit 44 decreases, that is, the light incident on the adjustment member 40 increases.
[0023]
The light incident on the adjustment member 40 is diffused by the adjustment member 40, and then further diffused by the air layer 80. The diffused light is transmitted as transmitted light from the back surface of the dial plate 20 to illuminate the surface of the dial plate 20. As a result, the driver can visually recognize the speedometer (display) via smoked glass or the like. Then, the light source 50 is turned off so that the speedometer is not visible.
[0024]
As described above, since the display brightness in the vehicular display device 1 is adjusted to be uniform by the adjustment member 40, the brightness in the vicinity of the light source 50 is increased even when the high brightness light source 50 is used. This can be prevented. Further, even if the brightness adjustment, correction, etc. occur, the adjustment member 40 is detachably provided on the back side of the dial plate 20, so that it can be replaced with the adjustment member 40 that has been adjusted, corrected, etc. 40 can be easily adjusted, modified, etc., so that the time required for adjusting and changing the brightness can be reduced. Therefore, the balance of display luminance in the vehicle display device 1 can be easily adjusted.
[0025]
In addition, by using dot printing for the adjustment member 40, it is possible to easily perform printing in which the number of dots in the portion near the light source 50 of the adjustment member 40 is dense and the number of dots is coarser as the distance from the light source 50 increases. Printing with the number of dots corresponding to a subtle change in the amount of transmitted light transmitted through the dial 20 can be performed. Further, since the adjustment member 40 is detachably provided on the dial plate 20, even if correction or change occurs, it can be easily handled by dot printing. Therefore, the balance of display luminance in the vehicle display device 1 can be finely adjusted.
[0026]
By the way, in a normal combination meter that is not a black face system, there is a combination meter that adjusts the brightness balance by dot printing on the back surface of the dial 20 in order to adjust the brightness of the dial 20. In such a combination meter, display with high luminance is desired. Therefore, when dots are printed on the back surface of the dial plate 20, the dots appear as shadows on the surface of the dial plate, resulting in a problem of poor appearance.
[0027]
However, since light is diffused in the air layer 80 by interposing the air layer 80 between the adjusting member 40 and the dial plate 20 as in the present invention, the amount of transmitted light that passes through the dial plate 20 is transmitted. Thus, display with high luminance can be performed. Further, even when the high-intensity light source 50 is used, by providing the air layer 80 that diffuses light, it is possible to prevent dots printed on the adjustment member 40 from appearing as shadows on the surface of the dial 20. Can do. Therefore, in a black face type combination meter or the like, display with high luminance can be performed without deteriorating the beauty.
[0028]
In addition, in this Embodiment mentioned above, although the case where the adjustment member 40 was implement | achieved with the light guide member in which the dot printing part 44 was directly given by dot printing was demonstrated, this invention is not limited to this. The adjustment member 40 is realized by a transparent film on which dot printing has been performed, and is adhered to a light-guided transparent substrate or the like, or the sheet-like adjustment member 40 formed of a film or the like is provided on the back side of the dial 20 It can be set as various different embodiments, such as arranging.
[0029]
Moreover, in this Embodiment mentioned above, although the case where the dial 20 and the adjustment member 40 were fixed with the screw 70 was demonstrated, the fixing method of the dial 20 and the adjustment member 40 is not limited to this, For example, it can be set as various different embodiments, such as fixing dial 20 to adjustment member 40 with a claw fixing member.
[0030]
Furthermore, in the above-described embodiment, the case where the adjustment member 40 is adjusted so that the brightness of the display becomes uniform by performing dot printing has been described. However, the present invention is not limited to this, and halftone dots are used. It can also be adjusted by printing.
[0031]
【The invention's effect】
As described above, according to the vehicular display device according to the first aspect of the present invention, the display brightness in the vehicular display device is adjusted to be uniform by the adjusting member. Even if it is used, it is possible to prevent the luminance near the light source from increasing. In addition, even if brightness adjustment, correction, etc. occur, the adjustment member is detachably provided on the back side of the dial, so it can be replaced with an adjustment member that has been adjusted, corrected, etc. Since correction and the like can be easily performed, it is possible to shorten the time required for adjusting and changing the luminance. Therefore, there is an effect that the balance of display luminance in the vehicle display device can be easily adjusted.
[0032]
In addition, by using dot printing for the adjustment member, the number of dots near the light source of the adjustment member can be made dense, and printing with a coarser dot number as the distance from the light source can be easily performed. The number of dots can be printed according to a subtle change in the amount of transmitted light transmitted. Further, since the adjustment member is detachable from the dial, even if correction or change occurs, it can be easily handled by dot printing. Therefore, there is an effect that the balance of display luminance in the vehicle display device can be finely adjusted.
[0033]
Furthermore, by interposing an air layer between the adjusting member and the dial, light is diffused in the air layer, so that the amount of transmitted light that passes through the dial is increased, and display with high brightness is performed. It can be performed. Even if a high-luminance light source is used, it is possible to prevent the dots printed on the adjustment member from appearing as shadows on the surface of the dial by providing an air layer that diffuses light. Therefore, in a black face type combination meter or the like, there is an effect that display with high luminance can be performed without impairing the beauty.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a display device for a vehicle according to the present invention.
FIG. 2 is a view showing a cross section of the display device for a vehicle after passing through a straight line AA in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Display apparatus 10 for vehicles Movement 20 Dial 30 Pointer 40 Adjustment member 44 Dot printing part 50 Light source 80 Air layer

Claims (1)

Mounted on the vehicle, light emitted by turning on the light source is transmitted from the back surface of the dial, and the display of various states of the vehicle is made visible by the transmitted light, and the display is made invisible by turning off the light source. In a vehicle display device,
A thin plate-like adjusting member that is detachably provided on the back side of the dial and adjusts the transmission amount of the transmitted light that passes through the dial so that the brightness of the display is uniform .
The adjustment member is a light guide member that is dot-printed on at least one of the surface facing the light source or the surface facing the surface so that the transmission amount decreases as the distance from the light source decreases.
A vehicle characterized in that the adjustment member is provided between the adjustment member and the dial so as to create a gap that prevents the dots printed by the dot printing from appearing as shadows on the surface of the dial. Display device.

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