JP3735859B2 - Display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device for a vehicle, for example, and more particularly to a display device in which a pilot display unit is arranged in front of a display.
[0002]
[Prior art]
A conventional vehicle display device will be described with reference to FIGS. On the hard circuit board 1, for example, a tachometer 2 that is a pointer type display and a speedometer 3 that is a liquid crystal display are arranged in a state of being electrically connected to the circuit board 1. The tachometer 2 is fixed to the display body 4, the light guide 5 disposed on the front side of the display body 4, the display plate 6 disposed on the front side of the light guide 5, and the display body 4. The pointer 7 operates in accordance with the engine rotation of the vehicle.
[0003]
The speedometer 3 includes a liquid crystal display element 8 and a cell case 9 in which the liquid crystal display element 8 is held. An electrode lead 10 electrically connected to the circuit board 1 is fixed to the liquid crystal display element 8. It is. The cell case 9 has a function of holding the liquid crystal display element 8 and illuminating the liquid crystal display element 8 from behind by taking in light from a light source described later from the light receiving unit 11.
[0004]
The circuit board 1 is mounted with electronic components for driving the tachometer 2 and the speedometer 3, a pointer 7 of the tachometer 2, a light emitting diode 12 as a light source for illuminating the display board 6, and the like. A light emitting diode 12A for illuminating the liquid crystal display element 8 for the speedometer 3 is also mounted. These are housed in a synthetic resin lower case 13 whose front surface is opened, and a black facing plate is provided in front of the periphery of the display plate 6 constituting the tachometer 2 and the liquid crystal display element 8 constituting the speedometer 3. 14 is arranged. The facing plate 14 covers the inside of the lower case 13 that can be seen from the gap between the display plate 6 or the liquid crystal display element 8 and the lower case 13, and has a function of defining the display areas X 1 and X 2 of the tachometer 2 and the speedometer 3. Have. A colorless and transparent see-through plate 15 covers the front opening side of the lower case 13, that is, the tachometer 2 and the speedometer 3.
[0005]
In addition, the vehicle display device is usually provided with a pilot display unit for displaying a turn signal, a high beam or various warnings, and 16 is a left turn signal display unit (pilot display unit). As shown in FIG. 7, the left turn signal display unit 16 adheres a green transparent lens 17 provided with a left turn signal symbol to the facing plate 14. A light-shielding cylindrical body 18 made of a white synthetic resin is disposed around the light-emitting diode 12B for the left turn signal display unit 16 mounted on the circuit board 1 between the back surface of the facing plate 14 and the circuit board 1. And is attached to the circuit board 1 or the facing plate 14 by appropriate means such as screws or hooks. When the light emitting diode 12B is turned on, the lens 17 emits light brightly in green with the light guided through the cylindrical body 18.
[0006]
Reference numeral 19 denotes a right turn signal display section provided at 14 places of the turn-back plate adjacent to the right side of the tachometer 2, and reference numerals 20 and 21 denote an engine oil display section and a high beam display section. The structure of each display unit (pilot display unit) is the same as that of the left turn signal display unit 16 described above. That is, the lens 17A provided with each display symbol is adhered to the turn-back plate 14, and between the back surface of the turn-back plate 14 and the circuit board 1, around the light-emitting diodes 12C for each display section mounted on the circuit board 1. A light-shielding cylindrical body 18A is arranged.
[0007]
[Problems to be solved by the invention]
However, in the conventional example, the left and right positions of the left turn signal display unit 16 and the right turn signal display unit 19 are not horizontal (in FIG. 5, the left turn signal display unit 16 is the right turn signal display unit 19. Compared to the top). In order to make the positions of the left and right turn signal display portions 16 and 19 horizontal, for example, the left turn signal display portion 16 may be provided at 14 turning plates 14 between the tachometer 2 and the speedometer 3. Since a space for arranging the body 18 is required, a large interval between the tachometer 2 and the speedometer 3 is necessary, and the entire display device becomes large. Alternatively, it may be provided at 14 facing plates on the left side of the speedometer 3, but similarly an arrangement space is required, and the display device becomes large.
[0008]
In addition, there is a method in which a hole or notch is provided in the right turn signal display unit 19 and the liquid crystal display element 8 and the cell case 9 which are in a horizontal position, and the left turn signal display unit 16 is disposed there. Drilling a hole or providing a notch in the element 8 causes a large cost increase. Therefore, the left turn signal display unit 16 is set to the position shown in FIG. 5 so that the display device is not particularly enlarged. However, it is still not satisfactory because the tachometer 2 and the speedometer 3 need to be separated from each other. . In addition, as described above, the design remains unsatisfactory.
[0009]
The present invention has been made in view of these points, and an object of the present invention is to provide a display device that is more compact even if the display device includes a pilot display unit.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is arranged in a state of being electrically connected on a circuit board and having a non-display portion on the periphery, and is disposed substantially in front of the display or the periphery of the display, A cover that defines a display area of the display; a light source disposed on the circuit board; a pilot display disposed at the cover portion disposed in front of the non-display; and disposed around the light source And a light-shielding cylinder that guides light of the light source that illuminates the pilot display section, and the light source is mounted on the circuit board at a position that does not face the pilot display section. It has a substantially L-shaped cross section and guides light to the pilot display section .
[0011]
Further, a plurality of displays that are adjacently connected to each other on the circuit board and have a non-display portion on the periphery, and a cover that is disposed substantially in front of the display and defines a display area of the display , A light source disposed on the circuit board, a pilot display unit provided at the cover portion disposed in front of the non-display unit, and a pilot display unit disposed around the light source to illuminate the pilot display unit A light-shielding cylinder that guides light from the light source, and the light source is mounted on the circuit board at a position not facing the pilot display portion, and the cylinder has a substantially L-shaped cross section. Light is guided to the pilot display section.
[0012]
Further, the display device arranged behind the pilot display unit is a liquid crystal display device.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Although the present invention will be described as an embodiment of a display device used in a vehicle in the same manner as in the prior art, the same reference numerals are given to the same or corresponding parts as in the conventional example, and detailed description thereof will be omitted. The tachometer 2 and the speedometer 3 arranged on the hard circuit board 1 are accommodated in the lower case 13, and the front side of the tachometer 2 and the speedometer 3 is covered with the upper case 22.
[0015]
The tachometer 2 as a display device includes a display body 4, a light guide 5, a display plate 6, and a pointer 7 as in the conventional example. The light guide 5 is made of a light transmissive synthetic resin, and receives light from the light emitting diode 12 as a light source to illuminate the display board 6 and the pointer 7. Although not shown in detail, the display board 6 is provided with a white transparent display portion such as a scale and a number indicating the engine speed to be indicated by the pointer 7 on the surface of a colorless and transparent substrate. It is covered with a ground color layer, and when the light emitting diode 12 is turned on, the display portion is transparently displayed in white.
[0016]
The speedometer 3 as a liquid crystal display is composed of a liquid crystal display element 8 that displays a traveling speed, a travel distance (display unit), and the like of a vehicle, and a cell case 9 that holds the liquid crystal display element 8. An electrode lead 10 electrically connected to the circuit board 1 is fixed to the liquid crystal display element 8, and a lower end (circuit board 1 side) of the electrode lead 10 is a lead insertion hole (not shown) provided in the circuit board 1. Is soldered to a land provided on the back side of the circuit board 1. Reference numeral 23 denotes a push button made of synthetic rubber mounted on the upper case 22, and a switch (not shown) mounted on the circuit board 1 is pressed to switch, for example, a total or trip display for displaying the travel distance or trip integration. The value is reset to zero.
[0017]
The cell case 9 holds the liquid crystal display element 8 and also has a function as a light guide member that illuminates the liquid crystal display element 8 from the back by taking in light from the light emitting diode 12A as a light source from the light receiving unit 11, and is colorless and transparent. Made of synthetic resin. A glossy white reflector 24 is fixed to the back side of the cell case 9. The reflecting plate 24 is incident on the cell case 9 and then reflects light leaking from the back side to the liquid crystal display element 8 side to illuminate the entire liquid crystal display element 8 more brightly and uniformly.
[0018]
The upper case 22 in the present embodiment includes a transparent plate 15A for the tachometer 2 and a transparent plate 15B for the speedometer 3 made of colorless and transparent synthetic resin, and a cover portion integrally formed around the transparent plates 15A and 15B. 25. The covering portion 25 is made of a black synthetic resin and is disposed in front of the peripheral edges of the indicators 2 and 3 so as to cover the inside of the lower case 13 and further covers the tachometer 2 and the speedometer 3. It also has a function of defining display areas X1 and X2.
[0019]
The cover 25 is integrally provided with a vertical wall 26 toward the display panel 6 and the liquid crystal display element 8 side. The vertical wall 26 covers the lower case 13 more easily when the distance between the display panel 6 and the liquid crystal display element 8 and the cover portion 25 is wide. It is not necessary to install if there is no problem in the above. The cover portion 25 has a side wall 27 extending around the periphery. The side wall 27 covers the periphery of the lower case 13 on the front opening side. Further, in the display device according to the present embodiment, the pilot display portions of the left turn signal display portion 16, the right turn signal display portion 19, the engine oil display portion 20, and the high beam display portion 21 are provided on the cover portion 25 of the upper case 22. .
[0020]
The right turn signal display unit 19, the engine oil display unit 20, and the high beam display unit 21 are provided in the cover unit 25 on the right side of the tachometer 2, and a cross section thereof is shown in FIG. Reference numeral 28 denotes a colorless and transparent pilot lens having a convex lens portion 29 formed corresponding to each pilot display portion (one transparent material having three convex portions). The pilot lens 28 is formed integrally with the see-through plates 15A and 15B, the cover portion 25, and the side wall 27. A pilot display plate 30 is arranged behind the pilot lens 28. Although not shown in detail, each display symbol, for example, a right turn, is provided on the surface side corresponding to each convex lens portion 29 on a colorless and transparent substrate. A black ground color layer is provided except for the signal symbol, and a black transparent colored layer is further provided on the entire surface side.
[0021]
Further, a light-shielding cylinder 18A is provided around the light emitting diode 12C mounted on the circuit board 1 between the back surface of the pilot display board 30 on which the right turn signal symbol is formed and the circuit board 1, as in the conventional example. Is arranged. The cylindrical body 18A prevents light from the light emitting diode 12C that illuminates the pilot display plate 30 from leaking to the surroundings and adversely affecting other pilot display units, the display unit of the tachometer 2, and the like.
[0022]
The left turn signal display unit 16 is provided in a state of being close to (in contact with) the cover unit 25 disposed between the tachometer 2 and the speedometer 3. A cross section of the left turn signal display unit 16 is shown in FIGS. 28A is a colorless and transparent pilot lens for the left turn signal display section 16, and has a convex lens section 29A similar to the right turn signal display section 19 described above, and is integrated with the see-through plates 15A and 15B, the cover section 25 and the side wall 27. Is formed.
[0023]
A pilot display plate 30A for the left turn signal display unit 16 is disposed behind the pilot lens 28A, and a black ground color layer is provided on the surface side except for the left turn signal symbol, and further on the entire surface side. A black transparent colored layer is provided. The left turn signal display unit 16 is arranged in front of the periphery of the speedometer 3, but no display unit is provided at the eight liquid crystal display elements facing the left turn signal display unit 16. That is, even if the left turn signal display portion 16 is disposed in front of the liquid crystal display element 8, it is in front of the non-display portion and does not hinder the visual recognition of the speedometer 3.
[0024]
As described above, the liquid crystal display element 8 (speedometer 3) is disposed behind the left turn signal display unit 16, and a light source cannot be mounted on the circuit board 1 facing the pilot display board 30A. The diode 12B is arranged at a position (indicated by a broken line in FIG. 1) away from the speedometer 3 to the upper side. Therefore, the cylinder 18B disposed between the back surface of the pilot display board 30A and the circuit board 1 has a substantially L-shaped cross section, and the light from the light emitting diode 12B is transmitted to the pilot display board in the cylinder 18B. A light guide member 31 leading to 30A is arranged.
[0025]
In each pilot display unit configured in this manner, when the green light emitting diode 12C for the right turn signal display unit 19 mounted on the circuit board 1, for example, is lit, pilot display is performed with the light guided in the cylinder 18A. The right turn signal symbol formed on the plate 30 is displayed in green. At this time, the right turn signal symbol is enlarged and visually recognized by the convex lens portion 29 of the pilot lens 28 disposed in front of the pilot display plate 30. When the light emitting diode 12C is not lit, the right turn signal symbol is not recognized because it is covered with the black transmissive colored layer, and the pilot lens 28 also appears dark.
[0026]
Further, in the left turn signal display unit 16, when the green light emitting diode 12B for the left turn signal display unit 16 mounted on the circuit board 1 is lit, the light is guided by the light guide member 31 disposed in the cylindrical body 18B. The left turn signal symbol is transparently displayed in green. At this time, since the pilot lens 28A and the pilot display plate 30A and the light emitting diode 12B are misaligned, the light from the light emitting diode 12B does not directly shine on the pilot display plate 30A, but the light guide member disposed in the cylinder 18A. The light is efficiently guided to the pilot display board 30A by 31. It should be noted that the light guide member 31 may be omitted if necessary and sufficient brightness is obtained by providing the cylindrical body 18A with a reflecting surface for reflecting the light of the light emitting diode 12B toward the pilot display board 30A. In addition, the appearance when lighted and when not lighted is the same as that of the right turn signal display unit 19.
[0027]
In this way, the left turn signal display unit 16 (pilot display unit) is provided in the cover unit 25 disposed in front of the non-display unit at the periphery of the liquid crystal display element 8, so that a more compact display can be achieved while effectively utilizing space. A device can be obtained. Furthermore, the left turn signal display unit 16 is provided here by using the cover unit 25 disposed in front of the display units having a plurality of displays (tachometer 2 and speedometer 3). The spacing is narrowed, which allows further miniaturization of the display device. Further, the degree of freedom in laying out the left turn signal display unit 16 is also increased.
[0028]
Further, by mounting the light-emitting diode 12B for the left turn signal display unit 16 arranged in front of the speedometer 3 on the circuit board 1 on which the light-emitting diodes 12 and 12A for illuminating the tachometer 2 and the speedometer 3 are mounted. Even if it is the left turn signal display part 16 arrange | positioned in an arbitrary position, it is not necessary to provide a circuit board for exclusive use separately, and a structure becomes complicated and it can suppress a raise of cost. And the assembly | attachment workability | operativity of a display apparatus is also good, and it leads also to size reduction.
[0029]
Further, even if the speedometer 3 arranged behind the left turn signal display unit 16 is a liquid crystal display, for example, an alternative such as opening a hole or providing a notch in the liquid crystal display element 8 is particularly expensive. A compact display device can be provided which is advantageous in terms of cost compared to the specification.
[0030]
In the present embodiment, the cover portion 25 is provided on the upper case 22, but the cover portion 25 is formed as the facing plate 14 by using the same structure as the conventional example, and the left turn signal display portion 16 is provided on the facing plate 14. May be provided. In addition, although a plurality of displays (tachometer 2 and speedometer 3) are used, a single display may be used. Furthermore, although the speedometer 3 is a liquid crystal display, it may be a pointer-type display similar to the tachometer 2. Further, although a light emitting diode is used as a light source, a bulb may be used. However, especially for the pilot display portion, the light emitting diode is advantageous in reducing the diameter of the cylindrical body surrounding the light emitting diode and reducing the size of the display device.
[0031]
【The invention's effect】
As described above, according to the present invention, an initial object can be achieved, and even a display device including a pilot display unit can provide a more compact display device.
[Brief description of the drawings]
FIG. 1 is a front view of a display device showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the display device.
FIG. 3 is a cross-sectional view showing the left turn signal display portion (cross section BB in FIG. 1).
FIG. 4 is a cross-sectional view showing the left turn signal display portion (CC cross section in FIG. 1).
FIG. 5 is a front view showing a conventional display device.
FIG. 6 is a cross-sectional view showing the display device.
FIG. 7 is a cross-sectional view showing the left turn signal display portion (cross section AA in FIG. 5).
[Explanation of symbols]
1 Circuit board 2 Tachometer (display)
3 Speedometer (liquid crystal display, display)
12, 12A, 12B, 12C Light emitting diode (light source)
X1, X2 display area 16 Left turn signal display (pilot display)
18, 18A, 18B Cylinder 19 Right turn signal display (pilot display)
20 Engine oil display (pilot display)
21 High beam display (pilot display)
22 Upper case 25 Cover

Claims (3)

A display device arranged in a state of being electrically connected on a circuit board and having a non-display portion on the periphery;
A cover that is disposed substantially in front of the display or the periphery of the display, and defines a display area of the display;
A light source disposed on the circuit board;
A pilot display portion provided at the cover portion disposed in front of the non-display portion;
A light-shielding cylinder that guides the light of the light source that is disposed around the light source and illuminates the pilot display;
With
The light source is mounted on the circuit board at a position not facing the pilot display unit, and the cylindrical body has a substantially L-shaped cross section and guides light to the pilot display unit. Display device. A plurality of indicators that are adjacent to each other in a state of being electrically connected on the circuit board and have a non-display portion on the periphery;
A cover that is disposed approximately in front of the display and defines a display area of the display;
A light source disposed on the circuit board;
A pilot display portion provided at the cover portion disposed in front of the non-display portion;
A light-shielding cylinder that guides the light of the light source that is disposed around the light source and illuminates the pilot display;
With
The light source is mounted on the circuit board at a position not facing the pilot display unit, and the cylindrical body has a substantially L-shaped cross section and guides light to the pilot display unit. Display device.   The display device according to claim 1, wherein the display device arranged behind the pilot display unit is a liquid crystal display device.

Images