JPH0584984U - Wind sign - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide wind signs with improved daytime visibility. [Structure] A light-transmissive display film 3 having different display images is arranged in a plurality of display windows 2. A light source 4 is provided behind each display film 3. A liquid crystal sheet 5 which is transparent to light when a voltage is applied is arranged on the front surface of each display film 3, and when any one of the light sources 4 is turned on,
A voltage is applied to the liquid crystal sheet 5 located in front of the light source 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wind sign of a type in which a light source provided behind a display plate is turned on and a display image on the display plate is illuminated and visually recognized, and particularly, it is arranged near a windshield of a vehicle such as a taxi. And the wind sign that informs the current state of the vehicle to the outside.

[0002]

[Prior Art]

 Conventionally, a wind sign 11 used for a taxi or the like is usually arranged on a dashboard under a windshield, and has a display window 12 divided into four as shown in FIG. 3, for example. However, in these display windows 12, a display film 13 on which characters such as “empty”, “increase”, “turn”, and “greeting” are displayed is arranged. These display films 13 have a white background color, and the characters are composed of light-transmitting red, etc. Further, behind these display films 13 are provided lamps each having a reflector. Has been. Then, for example, when the lamp behind the display film that is displayed with the letters "empty" is lit, the portion of the letters "empty" shines red and the taxi can be visually recognized from the outside from the outside. It has become.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned wind sign makes it difficult to know which display window is lit during the daytime when the outside is bright, and when sunlight enters the display window through the windshield, the display film surface becomes so-called. It causes a washout phenomenon, and it becomes very difficult to distinguish from the outside which display window part is illuminated.

An object of the present invention is to provide a wind sign with improved daytime visibility.

[0005]

[Means for Solving the Problems]

 According to the wind sign of the present invention, a plurality of display windows are provided with light-transmissive display plates each having a different display image, and a light source is provided behind each display plate, and each display plate is provided. A liquid crystal sheet that becomes transparent when a voltage is applied is placed on the front surface of the LCD, and when one of the light sources is turned on, the voltage is also applied to the liquid crystal sheet located in front of the light source. I am trying.

[0006]

[Action]

 Based on the above configuration, when the light source behind any of the display plates is turned on, a voltage is simultaneously applied to the liquid crystal sheet positioned in front of the light source, and the liquid crystal sheet becomes light transmissive. Therefore, the light of the light source passes through the display plate and the liquid crystal sheet and is irradiated to the outside, and the display image on the display plate is shined and visually recognized from the outside. On the other hand, since no voltage is applied to the liquid crystal sheet on the front surface of the display plate where the light source is not turned on, the liquid crystal sheet is impermeable to light and the display plate cannot be visually recognized from the outside. In this way, since only the display panel with the light source turned on can be seen from the outside, it becomes clear at a glance which display panel is turned on during the daytime and when it is bright, and the visibility of the wind sign is improved. Greatly improved.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an exploded perspective view of a wind sign 1 according to an embodiment of the present invention. The wind sign 1 has a display film 3 as in the conventional case, and the display film 3 is divided into four different colors, for example, red, blue, yellow, green and other ground colors. Transparent or white characters consisting of "empty", "increase", "times", and "greeting" are displayed in each compartment. Each of the sections serves as a display window 2, and a light source 4 including a reflector 4b and a lamp 4a is arranged behind these display windows 2. A liquid crystal sheet 5 is arranged on the front surface of each of the display windows 2, and the liquid crystal sheet 5 becomes transparent when a voltage is applied between the front and back electrodes, and is in a state where no voltage is applied. Has a so-called liquid crystal shutter function that becomes milky white.

FIG. 2 shows an electric circuit of the wind sign 1 described above. As shown in the figure, the electric circuit is configured to operate by operation from the taximeter side. That is, the relay 6 and the lamp 4a connected in parallel are connected to the 12v power source as a load of the transistor TR installed on the taxi meter side. The output of the inverter 7 is applied between the transparent electrodes on the front and back surfaces of the liquid crystal sheet 5 via the contact 6a of the relay 6.

When a switch (not shown) on the taximeter side is operated in this state, the transistor TR corresponding to the switch is turned on, the lamp 4a is turned on and the coil of the relay 6 is excited. The contact 6a is turned on. When the contact 6a of the relay 6 is turned on, the AC output voltage of the inverter 7 is applied between the transparent electrodes on the front and back surfaces of the liquid crystal sheet 5, and the liquid crystal sheet 5 becomes transparent.

Therefore, the lamp 4a at the display window 2 where the switch operation is performed, for example, the display window 2 where the display of the display film 3 is “empty” is turned on, and further the liquid crystal sheet on the front surface of the display window 2 is turned on. 5 becomes transparent and becomes light transmissive, and a white "sky" character is shiningly visible from the outside in the ground color of the display film 3 in the display window 2, for example, red. On the other hand, at the display window 2 where the switch operation is not performed, the lamp 4a is naturally not turned on, and the liquid crystal sheet 5 on the front side thereof is in a milky white state because no voltage is applied to the display window 2 from the outside. Neither the background color nor the characters of the display film 3 in 2 are visible. Therefore, the current state of the vehicle can be seen from the outside.

Further, even when the surroundings are bright such as in the daytime, only the switch-operated display window 2 can be visually recognized as a special color from the outside, and the other display windows 2 are milky white. There is no fear of misunderstanding what is in. Further, even when sunlight irradiates the window sign 1 through the windshield or the like, the color of the display film 3 in the operated display window 2 can be visually recognized, so that the visibility is significantly improved. Further, in the conventional display film, it is difficult to know which display window is lit when the background is colored by reversing the coloring structure, but in the window sign 1 of this embodiment, the liquid crystal is displayed on the front surface. Since the sheet 5 is arranged, the colored constitution of the display film 3 can be colored with the background color, and thus the visibility by the color can be improved.

In the present embodiment, the taxi window sign has been described, but the present invention can be used not only in vehicles but also in various places, and the display image in the display film is not limited to characters, but also pictures, patterns, etc. Of course, the number of display windows is not limited to four.

[0014]

[Effect of the device]

 As described above, according to the present invention, since the liquid crystal sheet that becomes light-transmissive by applying a voltage is arranged on the front surface of each display plate, only the display plate that has been turned on can be visually recognized from the outside, and it can be seen in the daytime. The visibility of the wind sign can be improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a wind sign according to an embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the wind sign shown in FIG.

FIG. 3 is a front view of a conventional wind sign.

[Explanation of symbols]

 1 window sign 2 display window 3 display film (display board) 4 light source 5 liquid crystal sheet

Claims (1)

[Scope of utility model registration request] 1. A plurality of display windows are provided with light-transmissive display plates each having a different display image, a light source is provided behind each of the display plates, and light is applied to the front surface of each display plate by applying a voltage. A wind sign, wherein a transparent liquid crystal sheet is arranged so that when one of the light sources is turned on, a voltage is applied to the liquid crystal sheet located in front of the light source.