JPH0535877B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device equipped with a liquid crystal display unit.

[Prior Art] Conventionally, as a display device for motorcycles, etc., a liquid crystal display unit,
Some are equipped with a light guide plate, light, and electronic circuit board. Here, the electronic circuit board can control the operation of the liquid crystal display unit, and the light guide plate can guide the light from the light to the liquid crystal display unit.

[Problems to be Solved by the Invention] By the way, in the above-mentioned display device, in order to be able to display different display items such as traveling speed and engine rotation speed in an orderly manner, it is necessary to form a plurality of display areas separated from each other. is desired.

Therefore, one possible method for forming the plurality of display areas is to separate the case of the display device into individual cases corresponding to each of the plurality of display areas. However, in this case, an independent electronic circuit board will be provided for each individual case. Therefore, the installation area of each electronic circuit board becomes smaller, and the power connector,
It becomes necessary to separately maintain circuit parts that can be shared, such as a power supply smoothing circuit and a microcomputer, and the circuit configuration of each electronic circuit board becomes denser and more complicated.

On the other hand, as another method for forming the plurality of display areas, a plurality of display windows are provided in a single case of the display device, and a liquid crystal display unit and a light guide plate corresponding to each display item are provided in the case. It is possible to arrange them adjacently. However, in this case, the transmitted light from adjacent light guide plates will interfere with each other. Therefore, the brightness of each liquid crystal display unit,
It becomes difficult to set or adjust colors independently of each other depending on their usage.

The present invention forms a plurality of mutually separated display areas without complicating the circuit configuration of the electronic circuit board and without reducing the rigidity of the case, and also improves the brightness of the liquid crystal display unit in each display area. , the purpose is to enable colors to be independently set or adjusted according to their uses.

[Means for Solving the Problems] The present invention provides a case including a plurality of display windows;
Each liquid crystal display unit is arranged in each display area in the case corresponding to each display window, each light guide plate is arranged on the back side of each liquid crystal display unit and transmits light, and each light guide plate is arranged on the back side of each liquid crystal display unit and transmits light. It has each lamp arranged on the side, and an electronic circuit board arranged on the back side of each light guide plate over almost the entire area including each of the above-mentioned display areas in the case, and which controls the operation of each liquid crystal display unit. The case has a side wall portion surrounding each liquid crystal display unit, each light guide plate, and each lamp, and a bottom wall portion connecting opposing side walls between adjacent liquid crystal display units. A concave portion is formed by the bottom wall portion and the side walls on both sides thereof, and the electronic circuit board is in contact with the bottom wall portion, and the case and the electronic circuit board connect each liquid crystal display unit to its unit. A closed space containing a light plate and a lamp is formed, and the lamp is arranged on the opposite side of the recess in the closed space.

[Function] Multiple display windows are provided in a single case, and each liquid crystal display unit and an electronic circuit board for controlling the operation are arranged in a wide area including each display area within the case. In addition to increasing the area, there is no need to redundantly install circuit parts common to each liquid crystal display unit.

The recess provided in the case functions as a light shielding part,
It becomes possible to independently set or adjust the brightness and color of the liquid crystal display unit in each display area according to their usage, without mutual interference between the light transmitted through the light guide plate between adjacent display areas. .

Since the case and the electronic circuit board form a closed space for each liquid crystal display unit, it is possible to more reliably improve the light shielding performance between the above-mentioned adjacent display areas.

Since the lamp is placed on the opposite side of the recess (the boundary between adjacent display areas) within the closed space,
It is possible to reduce the possibility that the light from the lamp will reach an adjacent display area, and to more reliably improve the light shielding performance between the above-mentioned adjacent display areas.

The presence of the recess provided in the case increases the rigidity of the case.

[Embodiment] FIG. 3 is a plan view showing a motorcycle display device 10 according to an embodiment of the present invention, FIG. 1 is a sectional view taken along the - line in FIG. 3, and FIG. FIG. 3 is a sectional view taken along the - line in the figure.

In the figure, 11 is a case, case 11
are two display windows 12A and 12 made of glass plates.
It is equipped with B. Both display windows 12A, 12B are
Each of them is integrally molded with the case 11. That is, the case 11 has each display window section 12A, 12B.
Two display areas 13A, 1 corresponding to each of
3B are formed in a state where they are separated from each other.

One display area 13A in the case 11 includes, for example, a liquid crystal display unit 14A for displaying the traveling speed;
A cumulative distance meter 15 is provided. The other display area 13B is provided with a liquid crystal display unit 14B for displaying, for example, the engine rotational speed. Each liquid crystal display unit 14A, 14B is supported by each spacer holder 16A, 16B coupled to the case 11. Here, each liquid crystal display unit 14
A and 14B are composed of a display plate containing a liquid crystal and a reflecting plate provided on the back surface thereof. The display board has a liquid crystal display on its surface that displays characters or patterns corresponding to the displayed items. The reflector is an anti-transmissive type that reflects light hitting the front surface and transmits light from the back surface.

Light guide plates 17A, 17B are disposed on the back surfaces of each of the liquid crystal display units 14A, 14B, respectively, and on the outside sides of each light guide plate 17A, 17B,
Lamps 18A and 18B are provided respectively. Here, each light guide plate 17A, 17B is made of a transparent or anti-transparent material, for example, a colorless and transparent synthetic resin material, and guides the light of each lamp 18A, 18B to display each liquid crystal display unit 14A, 14B on the back surface thereof. This makes it possible to illuminate from. Also,
A large number of small recesses are carved on the back surfaces of the light guide plates 17A and 17B on substantially the entire surface thereof, that is, in areas corresponding to the liquid crystal display units 14A and 14B. This small concave portion functions to diffusely reflect the light hitting the back surfaces of the light guide plates 17A, 17B and change its traveling direction.

Note that color printing may be applied to the back surface of the reflector so that the light that passes through the reflector becomes a colored ray, so that the display on the liquid crystal display units 14A and 14B is colored. Moreover, these liquid crystal display units 14A, 14B
As a means of adding color to the display, the light guide plate 17
A and 17B may be made of a colored semi-transparent resin material.

On the back side of each of the light guide plates 17A, 17B, an electronic circuit board 19 is disposed in a substantially entire area including each display area 13A, 13B inside the case 11. The electronic circuit board 19 has an electronic circuit for controlling the operation of each liquid crystal display unit 14A, 14B. This electronic circuit board 19 and each liquid crystal display unit 14A, 14B are electrically connected by a zebra connector 20 made of conductive rubber as shown in FIG. Note that the zebra connector 20 has a heat seal 21 shown in FIG.
It can be replaced by the lead pin 22 shown in FIG. 6 or the like.

Here, the case 11 covers each liquid crystal display unit 1.
4A, 14B, each light guide plate 17A, 17B, and each lamp 18A, 18B.
The recess 11C is formed by the bottom wall 11B and the side walls 11A, 11A on both sides thereof.

The electronic circuit board is in contact with the bottom wall portion 11B, and the case 11 and the electronic circuit board 19 connect the unit 14A, 14B and the light guide plate 17A, 17B to each liquid crystal display unit 14A, 14B.
A closed space containing lamps 18A and 18B is formed, and each lamp 18A and 18B is arranged on the opposite side of the recess 11C within the closed space.

Adjacent display area 13 inside the case 11
The recess 11C provided at the boundary between A and 13B is
A light shielding portion 23 is formed. That is, the light shielding part 23
is formed by a recess 11C formed by bending the middle part of the case 11 sandwiched between the display windows 12A and 12B into a substantially U-shaped cross section, and the lower part of the recess 11C hangs down to a position where it contacts the surface of the electronic circuit board 19. I'm letting you do it. As a result, the light shielding portion 23 is connected to the adjacent light guide plate 1
It is possible to block the passage of light between 7A and 17B.

In addition, since the light shielding part 23 is formed by the bent recess 11C in the middle part of the case 11 as described above, the two display areas 13A,
Case 1 is formed in a wide shape with 13B.
It also has the function of improving the rigidity of 1.

Thus, in the display device 10, during the daytime when the surroundings are bright, sunlight illuminates the liquid crystals in the display panels of each liquid crystal display unit 14A, 14B, enabling a predetermined display. On the other hand, at night, the light from the lamps 18A, 18B is guided by the light guide plates 17A, 17B, and each liquid crystal display unit 14A,
A predetermined display is made by illuminating the liquid crystal in the display panel 14B.

Next, the operation of the above embodiment will be explained. According to the display device 10, a plurality of display windows 12A and 12B are provided in the single case 11, and the case 11
An electronic circuit board 19 is disposed in a wide area including each display area 13A, 13B inside. Therefore,
In addition to increasing the installation area of the electronic circuit board 19, there is no need to redundantly install circuit parts common to each liquid crystal display unit 14A, 14B. That is, a plurality of mutually separated display areas 13A, 1 can be created without complicating the circuit configuration of the electronic circuit board 19.
3B can be formed.

Furthermore, due to the presence of the light shielding part 23, the light transmitted through the light guide plates 17A, 17B does not interfere with each other between adjacent display areas, and the brightness and color of the liquid crystal display units 14A, 14B of each display area 13A, 13B can be controlled. It becomes possible to adjust settings independently depending on their usage. Furthermore, each liquid crystal display unit 14 is connected to the case 11 and the electronic circuit board 19.
Since closed spaces are formed for each of A and 14B, the light shielding performance between adjacent display areas described above can be surely improved.

Furthermore, since the lamps 18A and 18B are arranged on the opposite side of the recess 11C (the boundary between adjacent display areas) within the closed space, the possibility that the light from the lamps 18A and 18B reaches the adjacent display area is reduced. , the above-mentioned light shielding performance between adjacent display areas can be improved more reliably.

Further, the presence of the recess 11C provided in the case 11 increases the rigidity of the case 11.

[Effects of the Invention] As described above, according to the present invention, a plurality of mutually separated display areas can be formed without complicating the circuit configuration of the electronic circuit board and without reducing the rigidity of the case. At the same time, the brightness and color of the liquid crystal display unit in each display area can be independently set or adjusted according to their usage.

[Brief explanation of the drawing]

Figure 1 is a sectional view taken along the - line in Figure 3;
The figure is a cross-sectional view taken along the - line in FIG. 3, FIG. 3 is a plan view showing an embodiment of the present invention, and FIG. 4 is a cross-sectional view showing the connection structure between the liquid crystal display unit and the electronic circuit board shown in FIG. 5 is a sectional view showing a modification of FIG. 4, and FIG. 6 is a sectional view showing another modification of FIG. 4. DESCRIPTION OF SYMBOLS 10... Display device, 11... Case, 11A... Side wall part, 11B... Bottom wall part, 11C... Recessed part, 12A, 1
2B...display window section, 13A, 13B...display area, 1
4A, 14B...Liquid crystal display unit, 17A, 17
B...Light guide plate, 18A, 18B...Lamp, 19...Electronic circuit board, 23...Light shielding part.

Claims (1)

[Scope of Claims] 1. A case including a plurality of display windows, each liquid crystal display unit disposed in each display area in the case corresponding to each display window part, and a case provided on the back surface of each liquid crystal display unit. Each light guide plate is arranged to transmit light, each lamp is arranged on the side of each light guide plate, and the lamps are arranged on the back side of each light guide plate over almost the entire area including each of the above-mentioned display areas inside the case. The case has a side wall portion surrounding each liquid crystal display unit, each light guide plate, and each lamp, and a case has a side wall portion surrounding each liquid crystal display unit, each light guide plate, and each lamp. It has a bottom wall that connects the opposing side walls between the liquid crystal display units, the bottom wall and the side walls on both sides form a recess, and the electronic circuit board is in contact with the bottom wall, A display device in which a case and an electronic circuit board form a closed space in which each liquid crystal display unit, a light guide plate, and a lamp are built in, and the lamp is arranged on the opposite side of the recess in the closed space.