JP2880982B2 - Display shielding signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display shielding signal, and more particularly, to a display shielding signal having a light-emitting display unit having a shielding function.

[0002]

2. Description of the Related Art In general, a traffic light is visually recognized by turning on and off the contents of a notification to the outside. In some cases, it may appear that the light is turned on by the reflected light even though the light is turned off, so that the visibility is reduced and a dangerous element is included.
In particular, in the case of a railway signal that requires a high degree of reliability, there is a risk that a false recognition due to the pseudo reflected light of the sun may lead to a major accident.

[0003] As one example of a traffic signal in consideration of such visibility, a "traffic signal" disclosed in Japanese Patent Application Laid-Open No. Sho 60-081699 is known.

In this publication, the surface of a traffic light arrow light device is selectively cut off by a cutoff mechanism, and the cutoff mechanism is controlled to be cut off according to a time zone, so that the driver can confirm the arrow light light device. Techniques for facilitating are described.

In the "color light signal" described in Japanese Patent Application Laid-Open No. 04-193676, a liquid crystal plate is provided so as to cover the outer surface of the colored glass of the color light signal to prevent generation of a pseudo signal due to retroreflection of sunlight. The technology to do this is described.

[0006]

The above-mentioned conventional display shield signal has a drawback that periodic maintenance is required due to the presence of mechanically movable parts. It also has the disadvantage that the display of the traffic light is fixed to a monochromatic display by the installed colored glass.

[0007] An object of the present invention is to provide a picture / display by displaying a plurality of colors.
It is an object of the present invention to provide a display shield signal that electronically shields the lighting of characters.

[0008]

According to the present invention, there is provided a display shielding signal device which transmits a pictograph light emitted by a display unit when a light-emitting unit is turned on, and transmits a pictograph of the display unit when the light-emitting unit is turned off. And a shielding part for shielding the light.

In addition, a plurality of colors are displayed and shielded by emitting monochromatic light.

A light emission control unit for outputting a first control signal for designating a lighting color; a light emitting unit for turning on and off by the on / off operation of the first control signal; A pictogram board for projecting light;
A shielding control unit that receives the first control signal and outputs a second control signal that controls transmission and shielding of the projection light;
In response to the on / off operation of the second control signal, transmitting the projection light of a designated color when the light emitting unit is turned on,
And a polarizing unit for shielding the projection light of a designated color when the light emitting unit is turned off.

A light emission control section for outputting n (n is an integer of 2 or more) first control signals for designating a lighting color; and turning on and off by the on / off operation of the n first control signals. N light-emitting portions for performing light emission; n picture-character plates each of which emits n projection lights indicating display contents corresponding to the light-emission of each of the n light-emitting portions; And a shield control unit that outputs n number of second control signals for controlling transmission and shielding of the n pieces of projection light; and corresponds to an on / off operation of the n number of second control signals. Transmitting the n projection lights of the designated color when the n light emitting units are turned on, and blocking the n projection lights of the designated color when the n light emitting units are turned off. And a plurality of polarizing parts.

The polarizing section has a liquid crystal plate for red which emits red, a liquid crystal plate for green which emits green, and a liquid crystal plate for blue which emits blue, and which is controlled by the second control signal. It is characterized by emitting a specified color.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of a display shielding signal according to the present invention.

In this embodiment shown in FIG. 1, a light emission control unit 3 for designating a lighting color and a display unit 2 for displaying pictograms are provided.
And a shielding unit 1 that performs shielding in accordance with turning on and off of the display.

The shielding unit 1 is provided on the front surface of the traffic light in the viewing direction, and performs a light transmission and a light shielding of a designated color, a polarizing unit 6, and a light-on / off control output from the light emission control unit 3 to the display unit 2. And a shielding control unit 7 for inputting the signal 8 and outputting a light transmission control signal 9 to the polarizing unit 6. The polarizing unit 6 sets the light emitting unit incident light 14 of the color designated by the on / off operation of the light transmission control signal 9 to the light transmitting state or the light shielding state, and controls the emission of the designated color transmitting light 15.

The display unit 2 outputs a light-emitting unit 4 for turning on and off by an on-off operation of a light-on / off control signal 8 from the light-emitting control unit 3 and a light-emitting unit incident light 14 for making display contents visible from the outside. It has a picture / character board 5.
The picture / character plate 5 is provided between the light emitting unit 4 and the polarizing unit 6,
When the light emitting unit 4 is turned on and the polarizing unit 6 is in the light transmitting state, the display contents of the picture / character plate 5 can be visually recognized from the outside in a designated color.

FIG. 2 is a detailed block diagram showing an example of the polarizing section of FIG.

Referring to FIG. 2, the polarizing section 6 includes a liquid crystal panel 11 for red, a liquid crystal panel 12 for green, and a liquid crystal panel 13 for blue, and is based on a light transmission control signal 9 from a shielding control section 7. By controlling the combination of the red liquid crystal plate 11, the green liquid crystal plate 12, and the blue liquid crystal plate 13, light of a designated color is transmitted or blocked.

FIG. 3 is a block diagram showing a lighting state.
3A shows a lighting operation state, and FIG. 3B shows a state in which pictures and characters are recognized from outside.

FIG. 4 is a block diagram showing a light-off state.
FIG. 4A shows an operation state in which the light is turned off, and FIG.

In FIGS. 2, 3 and 4, components corresponding to those shown in FIG. 1 are denoted by the same reference numerals or symbols, and their description is omitted.

Next, the operation of this embodiment will be described in more detail with reference to FIG. 1, FIG. 2, FIG. 3, and FIG.

The on / off control signal 8 from the light emission control unit 3 turns on the light transmission control signal 9 for transmitting light from the shielding control unit 7 to the polarization unit 6. By this ON operation, the polarizing section 6 causes the light of the designated color to be in a transmitting state. Simultaneously with this operation or with a certain time difference, the light emitting unit 4 is turned on by the light-off / light-off control signal 8, emits light emitting unit incident light 14 that allows the display contents of the picture / character plate 5 to be viewed, and The specified color is displayed externally. That is, as shown in FIG. 3A, the light emitting unit 4 is in a lighting state, the polarizing unit 6 is in a designated color light transmitting state, and FIG.
As shown in the figure, the display "ABCD" on the picture / character board 5 can be recognized from the outside.

Next, the light-on / off control signal 8 from the light emission control unit 3
By turning off the light, the light transmission control signal 9 is turned off in order to shield the light from the shielding control unit 7 to the polarizing unit 6. By this off operation, the polarizing unit 6 blocks the light of the designated color,
The picture / character board 5 cannot be recognized from outside. That is,
As shown in FIG. 4A, the light emitting unit 4 is in the light-off state, the polarizing unit 6 is in the light shielding state, and the picture / character plate 5 is blocked as shown in FIG. At this time, the light-emitting unit 4 may be turned on or off, but is usually turned off to reduce power consumption.

FIG. 5 is a block diagram showing a second embodiment of the present invention.

Referring to FIG. 5, a light emission control unit 23 for designating a lighting color, a display unit 22 for displaying pictograms, and a shielding unit 21 for opening and closing the shield in accordance with the lighting and extinguishing of the display unit 22. The display unit 22 includes light emitting units 31, 32, and 33 and corresponding picture / character plates 34,
35, 36, and the shielding portion 21
Light-emitting unit incident light 40, 41, 4 output by 4, 35, 36
It has polarization sections 25, 26, 27 for receiving the light 2 and a shielding control section 24 for controlling these polarization sections.

An on / off operation of the on / off control signals 28, 29, 30 output from the light emission control section 23 turns on or off an arbitrary light emitting section. At the same time, the corresponding polarization sections 25, 26, and 27 are designated by the specified color by the shielding control section 24 which receives the on / off operations of these on / off control signals 28, 29, 30 and turns on / off the light transmission control signals 37, 38, 39. The transmission state or the light shielding state is set. By this operation, only the display contents of the desired picture / character plates 34, 35, 36 can be made visible from the outside.

Although the configuration example in which the light-emitting portion, the picture / character plate, and the polarizing portion are three is shown here, the number is not limited to three but may be any number.

[0030]

As described above, the display shielding signal of the present invention is provided with a means for shielding the display unit, thereby preventing the reflection of the picture / character board by extraneous light, thereby turning on and off the display unit. Can be easily determined, and the visibility of the traffic signal is improved.

Also, the provision of the color control means for the transmitted light of the display unit has the effect that a single light emitting unit can display a plurality of colors.

Further, since the light transmission and shielding by the polarizing section are performed electronically, there is an effect that maintenance is unnecessary and the size can be reduced as compared with a movable mechanism.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a display shield signal of the present invention.

FIG. 2 is a detailed block diagram illustrating an example of a polarization unit in FIG.

FIG. 3 is a configuration diagram showing a lighting state.

FIG. 4 is a configuration diagram showing a light-off state.

FIG. 5 is a block diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield part 2 Display part 3 Light emission control part 4 Light emission part 5 Picture / character board 6 Polarization part 7 Shield control part 8 ON / OFF control signal 9 Light transmission control signal 11 Red liquid crystal plate 12 Green liquid crystal plate 13 Blue liquid crystal plate Reference Signs List 14 light emitting unit incident light 15 designated color transmitted light 21 shielding unit 22 display unit 23 light emission control unit 24 shielding control unit 25, 26, 27 polarizing unit 28, 29, 30 lighting on / off control signal 31, 32, 33 light emitting unit 34, 35 , 36 Picture / character board 37, 38, 39 Light transmission control signal 40, 41, 42 Light incident part light

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Keigo Saito 5-7-1 Shiba, Minato-ku, Tokyo Within NEC Corporation (56) References Japanese Utility Model Sho 61-202805 (JP, U) Japanese Utility Model Hei 3 -50703 (JP, U) Japanese Utility Model 3-116497 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G08G 1/095

Claims (5)

(57) [Claims] A light-transmitting portion for transmitting light of pictograms emitted from the display portion when the light-emitting portion is turned on, and a light-shielding portion for blocking light of pictograms of the display portion when the light-emitting portion is turned off. A display shielding traffic light characterized by the above. 2. The display shielding signal according to claim 1, wherein a plurality of colors are displayed and shielded by emitting monochromatic light. 3. A light emission control section for outputting a first control signal for designating a lighting color; a light emitting section for turning on and off by the on / off operation of the first control signal; A pictogram plate that emits projection light indicating: a shielding control unit that receives the first control signal and outputs a second control signal that controls transmission and shielding of the projection light; A polarizing unit that transmits the projection light of a specified color when the light emitting unit is turned on and blocks the projection light of a specified color when the light emitting unit is turned off, corresponding to an on / off operation. A display shielding traffic light characterized by the above. 4. A light emission control section for outputting n (n is an integer of 2 or more) first control signals for designating a lighting color; and turning on and off by the on / off operation of the n first control signals. N light-emitting portions for performing light emission; n picture-character plates each of which emits n projection lights indicating display contents corresponding to the light-emission of each of the n light-emitting portions; And a shielding control unit that receives the control signal of n and outputs n second control signals for controlling transmission and shielding of the n projection lights;
In response to the on / off operation of the second control signal, the n
N light polarizers for transmitting the n projection lights of the designated color when the light emitting units are turned on and blocking the n light of the designated color when the n light emitting units are turned off And a shielding signal for display. 5. The liquid crystal display device according to claim 1, wherein the polarizing unit includes a liquid crystal plate for red that emits red, a liquid crystal plate for green that emits green, and a liquid crystal plate for blue that emits blue. 4. The method according to claim 3, wherein the specified color is generated.
Or a display shielding signal according to claim 4.