JP3858498B2 - Display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device including a plurality of displays.
[0002]
[Prior art]
Conventionally, there is a display device for a vehicle in which an indicator 2 (display) such as a speedometer and a tachometer and a light-emitting display 3 (display) such as a fluorescent display tube are housed in a housing 1 (see FIG. 4). ). The display board 4 of the indicating instrument 2 is formed with a light-shielding portion such as black print on the translucent substrate except for the indicator portion (scale or number), and when the pointer 5 indicates the scale, the speed of the vehicle and the engine Displays the rotation speed. A light source 6 such as a bulb is provided behind the display plate 4, and the indicator portion of the display plate 4 is transmitted and illuminated by the light source 6. A light source such as a light emitting diode is disposed at the base of the pointer 5, and the instruction unit 5a emits light. A smoke cover 7 is provided on the front surface of the housing 1 to protect the indicators 2 and 3. A transflective plate 8 is disposed between the indicating instrument 2 and the smoke cover 7, and the display light L of the light emitting display 3 is reflected by the transflective plate 8 and reaches the observer. ing. The light-emitting display 3 displays the time as a number, and the observer can visually recognize the time-displayed virtual image 9 at substantially the same height as the display plate 4.
[0003]
[Problems to be solved by the invention]
However, since the transmissivity of the transflective reflector 8 is about 50% and the transmissivity of the smoke cover 7 is about 20%, there is a problem that the indicating instrument 2 becomes dark. That is, when the light of the indicating instrument 2 (the light of the indicating portion 5a and the indicator portion of the display plate 4) passes through the semi-transmissive reflecting plate 7 and the smoke cover 9, it is attenuated to about 10%.
The present invention provides a display device that can display a virtual image and in which the luminance of the display (indicator) does not significantly decrease.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a first display comprising a display board, a light source that transmits and illuminates the display board, a pointer that indicates the display board, and a pointer driving means that drives the pointer. A second display comprising a light emitting display that emits display light, a reflector on which the display light is projected, the first display, the second display, and the reflector A display device, wherein the display light is reflected by the reflector, and the light of the first display does not pass through the reflector and reaches the observer It is a thing.
[0005]
In addition, the present invention provides a first display having a display plate and a light source that transmits and illuminates the display plate, and a second display comprising a first light emitting display that emits first display light. A third display comprising: a transflective plate on which the first display light is projected; and a second light emitting display that is disposed behind the transflective plate and emits the second display light. And a housing for housing the first display, the second display, the transflective plate, and the third display, wherein the first display light is Reflected by the transflective plate, the second display light is transmitted through the transflective plate, and the light of the first display is not transmitted through the transflective plate. It is configured to reach.
[0006]
In the present invention, the first indicator is an indicating instrument having a pointer indicating the display board and a pointer driving means for driving the pointer.
[0007]
The present invention also provides a first see-through portion having a first transmittance provided at a location corresponding to the first display, and a second view provided at a location corresponding to the second display. And a second see-through portion having transmittance, and having a cover locked to the housing.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The indicator instrument (first indicator 15) includes a display plate 21, a pointer 24 that indicates the display plate 21, a light source 22 that transmits and illuminates the display plate 21, and a pointer drive means 25 that drives the pointer 24. . The housing 10 accommodates a first display 15, a second display 17 made up of a first light emitting display, and a third display 16 made up of a second light emitting display. The The first display light L1 emitted from the second display device 17 is reflected by the semi-transmissive reflection plate 20, and the second display light L2 emitted from the third display device 16 is transmitted through the semi-transmissive reflection plate 20. Thus, the light from the first display 15 reaches the observer without passing through the transflective plate 20.
[0009]
【Example】
Hereinafter, an embodiment in which the present invention is applied to a vehicle display device will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a main part of a vehicle display device, and FIGS. 2 and 3 are front views.
[0010]
Reference numeral 10 denotes a housing. The housing 10 includes a front housing 11, a rear housing 12, a rear cover 13, and an upper cover 14. The housing 10 accommodates four indicating instruments 15 (first indicators), that is, a speedometer 15a, a fuel gauge 15b, a water temperature gauge 15c, and a tachometer 15d. The speedometer 15a and the tachometer 15d are larger than the fuel gauge 15b and the water temperature gauge 15c, and the fuel gauge 15b and the water temperature gauge 15c are disposed between the speedometer 15a and the speedometer 15d.
[0011]
The housing 10 houses a liquid crystal display 16 (third display) and a fluorescent display tube 17 (second display), which are disposed above the fuel gauge 15b and the water temperature gauge 15c. The fluorescent display tube 17 is connected to the circuit board 18, and the upper cover 14 is fixed to the front housing 11 with screws so as to cover the fluorescent display tube 17 and the circuit board 18, and protect the fluorescent display tube 17 and the circuit board 18. ing. An opening 19 is formed in the front housing 11 at a location facing the fluorescent display tube 17, and the display light L 1 of the fluorescent display tube 17 is transmitted through the opening 19 and projected onto a half mirror described later. The front housing 11 has a light shielding wall 11 a between the indicating instrument 15 and the liquid crystal display 16.
[0012]
Reference numeral 20 denotes a half mirror (reflecting plate). The half mirror 20 is inclined and sandwiched between the front housing 11 and the rear housing 12. The transmittance of the half mirror 20 is about 50%. The display light L2 of the liquid crystal display 16 passes through the half mirror 20 and reaches the observer. On the other hand, the display light L1 of the fluorescent display tube 17 is reflected by the half mirror 20 and reaches the observer. The rear cover 13 is locked to the front housing 11 and the rear housing 12 by locking claws to prevent dust from entering the housing 10.
[0013]
The indicating instrument 15 includes a dial plate 21 (display plate), a cold cathode tube 22 (light source), a light guide member 23, a pointer 24, a stepping motor 25 (pointer driving means), and a circuit board 26. The dial plate 21 is a substrate made of a translucent resin such as polycarbonate and black printed except for the scale (index portion 27). The cold cathode tube 22 and the light guide member 23 are disposed behind the dial 21, and the indicator portion 27 is transmitted and illuminated by the light from the cold cathode tube 22. The pointer 24 is rotated by a stepping motor 25 to indicate the indicator portion 27 of the dial 21. The light from the cold cathode tube 22 is guided to the pointer 24 by the light guide member 23, and the instruction portion 28 of the pointer 24 shines.
[0014]
The liquid crystal display 16 includes a TFT (thin film transistor) type liquid crystal display element in which a large number of pixels are arranged, and a light source that illuminates the liquid crystal display element from behind, and displays route guidance information and the like. The fluorescent display tube 17 has a letter-shaped light emitting segment and displays the time. Normally, the liquid crystal display 16 is in a non-display state, and the time is displayed as a virtual image by the fluorescent display tube 17 (see FIG. 2). In addition, the user can switch the display with the operation switch, turn off the fluorescent display tube 17, and display the route guidance information on the liquid crystal display 16 (see FIG. 3).
[0015]
Reference numeral 29 denotes a protective cover (cover), and the protective cover 29 is locked to the front side of the front housing 11 by a locking claw. The protective cover 29 includes a frame member 30, a first see-through plate 31 (first see-through portion), and a second see-through plate 32 (second see-through portion). The frame member 30 has a first opening 33 and a second opening 34 at locations corresponding to the indicating instrument 15 and the liquid crystal display 16, respectively. The first opening 33 and the second opening A first see-through plate 31 and a second see-through plate 32 are welded to 34 respectively.
[0016]
The frame member 30 is made of an opaque resin such as polypropylene, and the first and second see-through plates 31 and 32 are made of a translucent resin such as polycarbonate. The transmittance of the first see-through plate 31 and the second see-through plate 32 is about 20%. The first and second transparent plates 31 and 32 have a curved shape and are convex toward the liquid crystal display 16 side.
[0017]
The light from the indicating instrument 15 (the light from the indicator 28 and the indicator part of the display board 21) does not pass through the half mirror 20, so it is not dimmed by the half mirror 20 and is about 20% brighter than the emission luminance ( About twice as much as that of the conventional example.
Further, since the protective cover 29 is composed of the frame member 30, the first see-through plate 31, and the second see-through plate 32, the transmittance of the first and second see-through plates 31, 32 depends on the indicator 15 and the fluorescence. It can be appropriately selected so that the luminance balance of the display tube 17 is good. That is, in this embodiment, the brightness of the indicating instrument 15 is about twice that of the conventional example, and the time display by the fluorescent display tube 17 feels relatively dark. (The first transmittance) is about 20%, the transmittance of the second see-through plate 32 (second transmittance) is about 30%, and the luminance balance of the indicating instrument 15 and the liquid crystal display 16 is made good. Is desirable.
[0018]
In addition, although the present Example had the indicator 15 (1st display), the fluorescence display tube 16 (2nd display), and the liquid crystal display 16 (3rd display), it is 3rd. The display device may be omitted, the display device may be configured to include the indicator meter 15 (first display device) and the fluorescent display tube 16 (second display device), and the reflection plate may be a total reflection mirror.
Further, although the pointer driving means of the present embodiment is the stepping motor 25, for example, a cross coil type movement may be used. The protective cover 29 is formed by welding the first and second transparent plates 31 and 32 to the frame member 30. For example, the protective cover 29 is a protective cover in which the opaque portion, the first and second transparent portions are integrally formed. May be. In addition, the first indicator of the present embodiment is the indicator meter 15, but is an indicator in which a light source such as a light emitting diode and a bulb is disposed behind a display board for a fuel remaining amount warning, a seat belt warning, and the like. May be.
[0019]
【The invention's effect】
The present invention provides a first display comprising an indicator instrument having a display board, a light source for transmitting and illuminating the display board, a pointer for indicating the display board, and a pointer driving means for driving the pointer , and emitting display light A second display comprising a light emitting display, a reflector on which the display light is projected, a housing for housing the first indicator, the second indicator and the reflector. A display device, wherein the display light is reflected by the reflector, and the light of the first display does not pass through the reflector and reaches the observer; A virtual image can be displayed by this display, and the luminance of the first display is not significantly reduced.
[0020]
In addition, the present invention provides a first display having a display plate and a light source that transmits and illuminates the display plate, and a second display comprising a first light emitting display that emits first display light. A third display comprising: a transflective plate on which the first display light is projected; and a second light emitting display that is disposed behind the transflective plate and emits the second display light. And a housing for housing the first display, the second display, the transflective plate, and the third display, wherein the first display light is Reflected by the transflective plate, the second display light is transmitted through the transflective plate, and the light of the first display is not transmitted through the transflective plate. The second display can display a virtual image and the brightness of the first display is remarkable. Ku there is no possibility to decrease.
[0021]
The present invention also provides a first see-through portion having a first transmittance provided at a location corresponding to the first display, and a second view provided at a location corresponding to the second display. A second see-through portion having transmittance, and a cover that is locked to the housing, so that the brightness balance of each display can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a display device according to an embodiment of the present invention.
FIG. 2 is a front view showing the embodiment.
FIG. 3 is a front view showing the embodiment.
FIG. 4 is an exploded perspective view of a display device showing a conventional example.
[Explanation of symbols]
15 Indicator (first indicator)
16 Liquid crystal display (third display)
17 Fluorescent display tube (second display)
20 Half mirror (semi-transmissive reflector)
21 Dial (Display board)
22 Cold cathode tube (light source)
24 Pointer 25 Stepping motor (pointer driving means)
29 Protective cover (cover)
31 First see-through plate (first see-through section)
32 Second perspective plate (second perspective section)

Claims (4)

A first display comprising an indicator instrument having a display board, a light source for transmitting and illuminating the display board, a pointer for indicating the display board, and a pointer driving means for driving the pointer; and a light emitting display for emitting display light A display device comprising: a second display comprising a display; a reflector on which the display light is projected; and a housing for housing the first display, the second display, and the reflector. The display device is configured such that the display light is reflected by the reflection plate, and the light of the first display does not pass through the reflection plate and reaches the observer.   A first display having a display board and a light source that transmits and illuminates the display board; a second display comprising a first light-emitting display that emits first display light; and the first display. A third display composed of a transflective plate on which light is projected, a second light emitting display disposed behind the transflective plate and emitting second display light, and the first display A display device, a second display device, a semi-transmissive reflection plate, and a housing for housing the third display device, wherein the first display light is transmitted to the semi-transmissive reflection plate. Reflected, the second display light is transmitted through the transflective plate, and the light of the first display is not transmitted through the transflective plate, but reaches the observer. A display device characterized by the above. 3. The display device according to claim 2, wherein the first display is an indicating instrument having a pointer for indicating the display plate and a pointer driving means for driving the pointer. A first see-through portion having a first transmittance provided at a location corresponding to the first display, and a second having a second transmittance provided at a location corresponding to the second display. 3. The display device according to claim 1, further comprising: a cover having a see-through portion, and a cover locked to the housing.

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