JPH0558447U - Vehicle display - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a vehicular display device that is suitable for downsizing and that does not require balance settings such as brightness and color tone, and that has good display quality and visibility. [Structure] A plurality of compartments 12 corresponding to each of the plurality of displays are provided on a back surface of a dial 17 which is made of a translucent material and has a plurality of displays formed by printing or the like. Behind this compartment, the light source 10 for the backlight shared by them is arranged. A white turbid liquid crystal segment 14 which is transparent when a voltage is applied and becomes cloudy when a voltage is not applied is arranged between the light source and each display on the dial. Between the liquid crystal segment and the light source,
A prism 13 is provided which totally reflects external light that has passed through the liquid crystal segment from the dial side and guides it to a specific background color surface 13a and transmits light from the light source to the liquid crystal segment side.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a vehicular display device, and more particularly to a vehicular display device suitable for performing a switching display by selecting a specific one of a plurality of displays such as a position display of a torque converter.

[0002]

[Prior Art]

 Conventionally, position display devices for various types of torque converters have been developed with the spread of A / T vehicles. FIG. 5 is an exploded perspective view of a combination type vehicle display device in which the position display device of the torque converter is unitized with a speedometer, a tachometer, etc., and FIG. 6 is a cross-sectional view and a plan view of the position display device of the torque converter. ..

In the figure, a case 1 accommodating movements 2 and 3 of a speedometer and a tachometer is divided into three chambers 1a, 1b and 1c, and light sources 4 and 5 for meter backlight are provided in the left and right chambers 1a and 1b. , And the central chamber 1c is further divided into a plurality of small chambers, and each small chamber stores a light source 6 for displaying each position of the torque converter. Reference numeral 7 is a dial made of a translucent material, which is printed with letters, numbers, etc. printed on its surface, and 8 and 9 are pointer disks which are connected to the movements 2 and 3 and are rotated by the movement.

In the position display device of the torque converter, only the light source 6 at the corresponding position is turned on to identify and visually recognize it at the on position, and the display on the display plate 7 is directly visually recognized at the off position.

[0005]

[Problems to be solved by the device]

 In recent years, various display devices including the position display of the torque converter have been integrated, and the combination type has become widespread. This has led to demands for brightness balance and color tone balance between each display device, as well as high brightness and high display quality. It is progressing. For example, in the black face type that is visible only when turned on, it is necessary to increase the brightness of the light source, and therefore a xenon bulb or the like is used as the light source 6.

However, since the xenon bulb has a large amount of heat radiation, each of the plurality of small chambers in which the light source 6 is housed must be made large as described above, which is not suitable for downsizing the display device. In addition, when the emission color is close to red and a display device is installed adjacent to it, it is necessary to set the balance such as brightness and color tone with this display device, but the setting work is extremely difficult and troublesome. there were.

Therefore, in view of the above-mentioned problems, the present invention is to provide a vehicular display device suitable for downsizing and having good display quality and visibility without setting balance of brightness, color tone and the like. It is an issue.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, a vehicle display device according to the present invention is made of a translucent material, and a plurality of displays are formed on the surface by printing or the like to form a dial, and a plurality of displays on the dial are formed. In a vehicular display device capable of always visually recognizing, and shining one selected from among them, a plurality of displays, each corresponding to a plurality of displays, are provided on the back surface of the dial. Is provided, a light source for the backlight shared by the plurality of compartments is arranged behind the plurality of compartments, and a voltage is applied between the light source for the backlight and each display on the dial. A white turbid liquid crystal segment, which is transparent and opaque when no voltage is applied, is placed between the light source and the white turbid liquid crystal segment. Lead to and back It is characterized in that it has arranged up rhythm allowed to transmit light from the site for the light source to the turbid liquid crystal segment side.

[0009]

With the above configuration, when the cloudy liquid crystal segment is turned on and the light is transmitted, the viewer sees only the specific background color guided by the total reflection by the prism without seeing the backlight, for example, black. The display on the dial will be visually recognized with this background color as the background. On the other hand, when the cloudy liquid crystal segment is turned off and becomes a cloudy state, the viewer sees the light from the light source for the backlight, which is transmitted from behind the prism, is diffusely reflected by the cloudy liquid crystal segment in the cloudy state, so that the bright cloudy liquid crystal You will see the display on the dial with the segment behind.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 illustrate a position display device of a torque converter which is an embodiment of a vehicle display device according to the present invention. FIG. 1 is an exploded perspective view, and FIG. 2 is a cross-sectional view and a plan view. Is.

The display device includes a light source 10 for a backlight, which includes a cold cathode tube and constitutes a backlight, a diffusion plate 11 that uniformly diffuses the light of the light source 10, and a prism case as a partition chamber that accommodates and fixes the prism. 12, a prism 13 housed in each of the plurality of small chambers 12a of the prism case 12, an LCD panel 15 in which a cloudy liquid crystal segment 14 is arranged at a position corresponding to a character display indicating each position of the torque converter, a color filter 16 And a character plate 17 made of a translucent material and having a character display printed thereon. Then, the LCD panel 15, the color filter 16 and the display plate 17 are integrated and incorporated in the hole 18a of the dial 18 of another adjacent display device.

As shown in the figure, the prism 13 has a wedge-shaped cross section, and has a reflecting surface 13a that totally reflects the external light from the dial 17 side and a background color that receives the light totally reflected by the reflecting surface 13a. The receiving surface 13b serving as a surface is provided, and the receiving surface 13b is painted black, for example. As the cloudy liquid crystal segment 14, a cloudy liquid crystal segment 14 which has a light-transmitting property when a voltage is applied and which becomes cloudy when a voltage is not applied is used.

FIGS. 3 and 4 are views for explaining the principle of the present invention. At the time of white turbidity, the viewer uses the light from the light source 10 for backlight to see the white turbid liquid crystal segment which is opaque. Become. On the other hand, when transparent, only the black coated surface of the receiving surface 13b is seen through the total reflection surface 13a of the prism 13.

Therefore, when the cloudy liquid crystal segment 14 is turned on and off, the background color of the character display is switched to bright white and black. For example, when the torque converter is in the on position, the cloudy liquid crystal segment that is cloudy and bright is viewed as the background color. The contrast is high and the on-position can be easily identified. The background color can be arbitrarily selected by selecting the color filter 16 and the coating color of the prism receiving surface 13b. In any of the on-position and the off-position, the visibility of the character display can be improved by an appropriate background color. ..

Although the position display device of the torque converter has been described in this embodiment, the present invention can be applied to other display devices as long as the display device is used by switching the background color with a high contrast at the time of turning on and off. It is possible.

Further, in the present embodiment, the adjacent light source of the speedometer or the tachometer is used as the light source for the backlight, but a dedicated light source can also be used.

[0017]

[Effect of the device]

 As described above, according to the present invention, since the backlight light source common to a plurality of displays is used, and the background color of the display device is switched by using the cloudy liquid crystal segment and the prism, the brightness gradient It is possible to improve the visibility and display quality because it has no contrast. Further, since it is not necessary to use a large number of high-intensity light sources and no heat dissipation measures are required, miniaturization is possible, which is very convenient as a combination-type display device.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a vehicle display device according to the present invention.

2 is a cross-sectional and plan view of a portion of the device of FIG.

FIG. 3 is an explanatory diagram for explaining the operation principle of the cloudy liquid crystal.

FIG. 4 is an explanatory diagram for explaining the operation principle of the display device of the present invention.

FIG. 5 is an exploded perspective view of a conventional combination type vehicular display device.

6 is a view showing a cross section and a plane of a part of the conventional device of FIG.

[Explanation of symbols]

 10 Backlight Light Source 13 Prism 13b Background Color Surface (Receiving Surface) 14 Cloudy Liquid Crystal Segment 17 Dial

Claims (1)

[Scope of utility model registration request] 1. A dial is formed by forming a plurality of indicia on a surface of the translucent material by printing or the like, and a plurality of indicia on the dial can be visually recognized at all times and can be selected from them. In the display device for a vehicle, which is adapted to illuminate one of the above-mentioned ones, a plurality of compartments corresponding to each of the plurality of displays are provided on the back surface of the dial, and behind the plurality of compartments. A backlight light source shared by a plurality of compartments is arranged, and a cloudy liquid crystal segment that becomes transparent when a voltage is applied and becomes cloudy when a voltage is not applied is arranged between the backlight light source and each display on the dial. Between the cloudy liquid crystal segment and the light source, the external light that has passed through the cloudy liquid crystal segment from the dial side is totally reflected and guided to a specific background color plane, and the light from the backlight light source is reflected by the cloudy liquid crystal segment. Transparent to the side Vehicle display device being characterized in that disposed a prism that.