JPS5928189A - Liquid crystal display unit for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display device for a vehicle that displays vehicle information such as speed and engine speed in color on a liquid crystal display.

2. Description of the Related Art Conventionally, there is a liquid crystal display device for a vehicle that displays vehicle information in color on a liquid crystal display, for example, as shown in FIG.

In Figure 1, 1 is a light source using a cold cathode tube, etc.
A diffuser plate 2 is arranged in front of the light source 1 to homogenize the light from the light source 1, and a semi-transparent plate 8 is disposed in front of the diffuser plate 2.
A liquid crystal display board 4 having a predetermined liquid crystal display pattern 4a and a liquid crystal display pattern 4a are arranged in sequence, and a semi-transparent plate 8 absorbs light from the outside that enters through the liquid crystal display pattern 4a of the liquid crystal display board 4 during the daytime or when the surroundings are bright. The structure is such that the light is reflected and sent out together with the transmitted light from the light source 1, and when the surroundings are dark, the display pattern 4a of the liquid crystal display board 4 is backlit by the transmission of light from the light source 1 only, and a liquid crystal color display is performed. In order to do this, a paint 5 is applied to the surface of the semi-transparent plate 3 on the liquid crystal side, and the display pattern on the liquid crystal display board 4 is created using the reflected light from the paint 5 of light incident from the outside and/or the light from the light source l that passes through the paint 5. Colored in 4a.

In this way, the color display of the structure in which the paint 5 is applied to the display of the semi-transparent plate 8 can be easily corrected by arbitrarily determining the coating pattern (turn and color) of the paint 5 to easily change the liquid crystal display pattern of the liquid crystal surface plate 4. 4a can be colored, and the visibility of the vehicle liquid crystal display device can be improved.

However, such conventional liquid crystal display devices have a color display structure in which paint is applied to the semi-transparent plate, so when the surroundings are dark such as at night, the semi-transparent plate 3
The color is displayed by the light of only the light source 1 that passes through the paint 5, and when it passes through the paint 5, a part of the transmitted light is absorbed by the paint 5, so that the paint 5 is provided more than the uncolored part. There was a risk that the LCD color display would be difficult to see because the area where the camera was placed was dark.

The present invention has been made in view of such conventional problems, and provides a liquid crystal display device for a vehicle in which a diffuser plate and a semi-transparent plate are sequentially arranged between a light source and a liquid crystal display plate. In order to make the LCD color display easy to see even in the dark, a transparent Edgelight board coated with paint is placed between the semi-transparent board and the LCD display board, and light from a light source is introduced into the Edgelight board to display the paint. It is designed to emit light.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 2 is an explanatory diagram showing one embodiment of the present invention. First, to explain the configuration, 1 is a light source using a cold cathode tube or the like, and a light source L is mounted in front of this light source 1. A diffuser plate 2 is disposed to homogenize the light of the light source 1, and a semi-transparent plate 8 is disposed in front of the diffuser plate 2 to transmit light from the light source 1 and reflect light incident from the outside.

Further, an edgelight plate 7 made of transparent plastic, glass, etc. is disposed between the semi-transparent plate 3 and the liquid crystal display plate 4 disposed in front of it, and a liquid crystal power 2 is provided on the surface of the edgelight plate 7 on the liquid crystal side. -Paint 5 for marking
is applied.

The upper side of the main Tsuji light plate 7 is equipped with a
A light guide member 8 introduced into the edge light plate 7 is integrally formed, and the light from the light source 1 that enters the end of the light guide member 8 is made to enter the edge light plate 7.

Next, the action will be explained.

The light from the light source 1 is equalized by the diffuser plate 2.
The light from the surface light source is transmitted through the semi-transparent plate 3 and the edge light plate 7.
The liquid crystal display panel 4 is backlit through the backlight. Also, when the surroundings are bright such as during the daytime, external light entering through the liquid crystal display pattern 4al of the liquid crystal display plate 4 is transmitted to the semi-transparent plate 3.
The liquid crystal display panel 4 is back-illuminated with the light reflected from the front surface of the light source 1 and this reflected light, and the liquid crystal display panel 4 becomes transmissive due to the driving of the liquid crystal. Predetermined vehicle information is displayed on the liquid crystal using light obtained through the liquid crystal display pattern 4ai.

Father, the light from the light source 1 is introduced by the light guide member 8 to the edge light plate 7 coated with the paint 5, and the paint 5 is applied.
The paint 5 emits light from the light source l through the semi-transparent plate 3, the light incident from the outside reflected by the paint 6, and the light introduced through the light guide member 8. The paint 5 emits light with the combined intensity and colors the liquid crystal display pattern 4a of the liquid crystal display board 4.

Therefore, even when the surroundings are dark such as at night, part of the light transmitted from the light source l through the semi-transparent plate 3 is absorbed by the paint 5 and becomes dark, but it is not introduced by the light guide member 8. The paint 5 applied to the Edgelight board 74C emits light from the light source 1, and the light introduced to the Edgelight board 7 compensates for the decrease in transmitted light from the light source 1 due to the paint 5, and the paint 5
This prevents the parts provided with the paint 5 from becoming darker than the parts not provided with hj, and achieves high visibility of the liquid crystal color display even at night.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention,
This embodiment is characterized in that a dedicated light source 9 is provided opposite the end of the light guide member 8 as a light source for emitting light from the paint 5 provided on the edge light &7, and the other configuration is the embodiment shown in FIG. becomes the same as

According to this embodiment, since the light source 9 for the Edgelight board 7 that emits 5t of paint is provided separately from the light source 1 for backlighting the liquid crystal display board, the brightness of the light source 9 can be adjusted to The scene can be changed, and the brightness of the colored part where the paint 5 is provided can be made stronger than the brightness of the part where the paint 5 is not provided due to the transmitted light from the light source l, and the color display can be made different from other parts. It can also be used to raise parts.

As described above, according to the present invention, in a liquid crystal display device for a vehicle in which a diffuser plate and a semi-transparent plate are sequentially arranged 1q between a light source and a liquid crystal display plate, the semi-transparent plate and the liquid crystal display plate are A transparent Edgelight board coated with paint is installed between the
Since light from a light source is introduced into this edgelight board to make the paint emit light, the colored part of the high tl display butter 7 is made to be as bright as or brighter than other uncolored parts. This results in the effect that the visibility in liquid crystal color display can be significantly improved by coating the paint.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a conventional device, FIG. 2 is an explanatory diagram showing one embodiment of the present invention, and FIG. 3 is an explanatory diagram showing another embodiment of the present invention. 1...Light source 2...Diffusion plate 3...Semi-transmissive plate 4...Liquid crystal display board 4a...Liquid crystal display turf 5...Paint 7...Edzilight board 8.
...Light guide member 9...Light source (for Edgelight) Patent applicant Nissan Motor Co., Ltd.

Claims (1)

[Scope of Claims] A light source, a diffuser plate disposed in front of the light source to uniformize light from the light source, and a diffuser plate disposed in front of the diffuser plate to reflect light incident from the outside and the light source In a vehicle liquid crystal display device consisting of a semi-transparent plate that transmits light from the outside and a liquid crystal display plate placed in front of the semi-transparent plate, paint is applied between the semi-transparent plate and the liquid crystal display plate. 1. A liquid crystal display device for a vehicle, characterized in that a coated transparent Edgelight plate is disposed, and a light guide member is provided for introducing illumination light into a part of the Edgelight plate to cause the applied paint to emit light.