JP2500949Y2 - Vehicle display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a vehicular display device characterized by having a light-emitting display function by allowing light to enter from an end face of a display device using liquid crystal.

[Outline of the Invention] More specifically, the present invention relates to a vehicle display device in which a liquid crystal device including a capsule-shaped liquid crystal is attached to a part of an automobile glass.

[Prior Art] The display device includes a light emitting diode (LED), a fluorescent display tube (V
There are two types: FD), plasma display (PDP) and other light-emitting types, and liquid crystal display (LCD) typified by
They have been put into practical use while competing with each other. Above all, the light-emitting display device has been used for a medium-sized or large-sized display device that a person looks at relatively far from the strength of the display brightness. On the other hand, light-receiving LCDs have been used in medium-sized and small-sized display devices that are relatively familiar to people. However, the light-emitting display device has a drawback that the visibility is extremely low in the sunlight outdoors during the day because the brightness does not reach the sunlight. On the other hand, although the light-receiving display device has high visibility in sunlight, it has a drawback that it cannot be seen at night without illumination. For this reason, many day and night type display devices have been proposed, but none of them has been a definitive solution.

[Problems to be Solved by the Invention] An object of the present invention is to provide a liquid crystal display device for a vehicle, which can function both day and night.

[Means for Solving Problems] In the display device of the present invention, a dispersion medium in which a liquid crystal is dispersed is fixed between a pair of electrodes, at least one of which is a transparent electrode attached to the inner surface of the transparent substrate, and a space between the opposing electrodes is fixed. A liquid crystal device capable of adjusting a voltage has a light source for projecting light from the end face of the liquid crystal device into the dispersion medium fixed between the opposite electrodes, and a plurality of the liquid crystals are scattered in the dispersion medium. While being enclosed in the capsule, the electrodes are connected in conjunction with the turning on / off of the light source, and when the light source is turned off, a voltage is applied between the electrodes to make the liquid crystal transparent. When the light source is turned on, no voltage is applied between the electrodes, and the liquid crystal is in a scattering state.

In the liquid crystal device of the present invention, a nematic liquid crystal is dispersed in a small spherical shape in a dispersion medium made of any one of polyvinyl alcohol, urethane resin, and UV-curable polymer such as triallyl isocyanurate, and the dispersion medium is used as a pair of transparent electrodes. It can be obtained by pinching at. Further, a light bulb, an LED, or the like is used as a light source of the display device in the present invention, and white or colored light can be used. Furthermore, when the liquid crystal device is large, the light sources can be provided on a plurality of end faces of the liquid crystal device, or on four sides.

[Operation] In the display device according to the present invention, when the light source is turned off, a voltage is applied between the electrodes, and a plurality of capsule-shaped nematic liquid crystals scattered in the dispersion medium are arranged in the direction of the electrodes, which results in a transparent state. The device part functions as ordinary glass. In addition, when the light source is turned on, no voltage is applied between the electrodes, and the small spherical liquid crystals are arranged in a scattering state, that is, at random directions, which effectively scatters the light source.

[Embodiment 1] In FIG. 1, winkers (2), (2 ') formed of a liquid crystal device for rear window glass (1) for automobiles.
And the brake lights (3) and (3 ') are built in, and the yellow LED lamps (4) and (4) are attached to the winkers (2) and (2').
(4 ') is attached to the glass end face, and red LED lamps (5) and (5') are attached to the glass end faces of the brake lights (3) and (3 ').

2 is an enlarged view of a cross section taken along the line AA of the liquid crystal device shown in FIG. 1. The liquid crystal device has transparent electrodes on the inner end surfaces of a pair of PET films (7) and (7 '), respectively. (6),
(6 ') is formed, and the transparent electrode (6),
A urethane resin (8) is filled between (6 '), and a nematic liquid crystal (9) is made into a small spherical shape and dispersed therein. This liquid crystal device is fixed between a pair of glass plates (10) and (10 ') constituting a rear window glass (1) via an adhesive interlayer film poly (vinyl butyral) (11). Red LED as a light source under the liquid crystal device
Although the lamp (5) is arranged, the lamp is fixed in the frame (13) by the silicone resin (12).

In such a glass, if an AC voltage of 80 V is applied between the pair of transparent electrodes (6) and (6 ') of the liquid crystal device, the liquid crystal device portion is transparent and is not It doesn't change at all. However, when the brake or turn signal is used, the voltage of the liquid crystal device is set to zero and the LED lamp on the end face is turned on, so that the light emitted from the LED is scattered by the liquid crystal after entering the liquid crystal device, and the part of the liquid crystal device Strong scattered light can be seen at.

That is, as in the present embodiment, the present invention provides a display device that displays necessary signals when necessary on a transparent glass portion.

In this case, one liquid crystal device was arranged between the pair of glasses, but in order to increase the brightness, two or three stacked liquid crystal devices may be arranged between the pair of glasses. .

[Effects of the Invention] As described above, in the vehicle display device of the present invention,
The liquid crystal is enclosed in a plurality of capsules dispersed in a dispersion medium, and the electrodes are connected in conjunction with the lighting / extinguishing operation of a light source. The liquid crystal is arranged in the direction of the electrodes to be in a transparent state, and when the light source is turned on, the voltage is not applied between the electrodes, and the liquid crystal is arranged in a scattering state, that is, in an at random direction to be a cloudy state. Therefore, the display device portion can function as an ordinary window glass in the normal state, and can also function as the display device when the light source is turned on.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of a rear window glass for an automobile, and FIG. 2 is an enlarged view of a cross section taken along line AA of FIG. 1: Rear window glass, 2: Winker 3: Brake light, 4: Yellow LED lamp 5: Red LED lamp, 6,6 ′: Transparent electrode 7,7 ″: Film, 8: Urethane resin 9: Nematic liquid crystal, 10, 10 ': Glass plate 11: Bonding interlayer film

Claims (1)

(57) [Scope of utility model registration request] 1. A liquid crystal device in which a dispersion medium in which a liquid crystal is dispersed is fixed between a pair of electrodes, at least one of which is a transparent electrode attached to the inner surface of a transparent substrate, and the voltage between the opposite electrodes can be adjusted. The liquid crystal device has a light source for projecting light from the end face of the liquid crystal device into the dispersion medium fixed between the counter electrodes, and the liquid crystal is enclosed in a plurality of capsules scattered in the dispersion medium, The electrodes are connected in conjunction with turning on / off of the light source. When the light source is turned off, a voltage is applied between the electrodes to bring the liquid crystal into a transparent state, and when the light source is turned on, the electrodes are turned on. A vehicular display device, characterized in that the liquid crystal is configured to be in a scattering state when no voltage is applied between them.