CN212570337U - Transparent projection display system for subway shield door - Google Patents

Abstract

The utility model discloses a transparent projection display system for subway shield door, including hoist and mount at the projector of platform top, the computer that is connected with the projector and paste the dress at the positive full transparent projection screen of subway shield door, cut the light device including setting up the first transparent polaroid on the projector and set up the transparent polaroid of second at the subway shield door back. The utility model discloses an adopt full transparent projection screen to paste the dress on the screen door, the installation of full transparent projection screen does not influence the transparency quality of subway screen door, and, through increasing the light cutting device, the light cutting device is transparent material equally, can save the projection/interdiction device of projector, also can save the required circular telegram of ordinary liquid crystal membrane of adjusting luminance/outage auto-change over device, can also save train business turn over station signal detection or receiving arrangement simultaneously, simplify system design greatly, moreover, the structure is simple, and, full transparent projection screen has more scientific and technological sense than liquid crystal membrane of adjusting luminance display effect.

Description

Transparent projection display system for subway shield door

Technical Field

The utility model relates to a display screen field especially relates to a transparent projection display system for subway shield door.

Background

Subways become more and more the main way for urban people to go out, daily passenger traffic of one city subway is many millions, and daily passenger traffic of individual cities even exceeds ten million. Subway is becoming important advertising battlefield increasingly because of huge passenger flow volume, and various forms of advertisement of subway are full of sight at present, poster, lamp house, LCD TV, LED screen, projection advertisement, etc. are expected to be the best. One of the projection advertisements makes full use of subway shield door resources, provides large-screen dynamic multimedia display service by adding a liquid crystal dimming film on shield door glass, is more attractive compared with static advertisements such as posters and lamp boxes, is larger compared with an LCD television advertisement screen, and is more and more popular with advertisers.

Because the liquid crystal membrane of adjusting luminance has the characteristics of "circular telegram is transparent, the atomizing of outage", the membrane of adjusting luminance is in atomizing state in the outage, can destroy the transparency of shielding door. The current solution, like patent CN201520301684.9, controls the power on/off of the dimming film through a control system, and when it is detected that a train enters the station, the projector signal is cut off, the dimming film is powered on to keep transparent, and when the train leaves the station, the projector signal is played, and the dimming film is powered off and atomized to be used as a projection screen. Therefore, the influence of the projection light on passengers in the train when the train arrives at the station is avoided, and the problem that the transparency of the shielding door is not influenced by the dimming film when the train arrives at the station is also solved. However, this method is still not a good solution, and the main drawbacks of the method are that the system needs to add a complex control system, a train entering and exiting signal detection device or a train entering and exiting signal from a dispatching room needs to be added, and the signal on/off of the projector and the power on/off of the dimming film are frequently controlled, which increases the complexity and instability of the whole system.

In addition, the fogging state of the dimming film is opaque, and other advertising positions, such as light box advertisements on the other side of the track, can be shielded while the film works normally as a projection screen.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the transparent projection display system for the subway screen door is simple in control structure, does not affect the transparency of the subway screen door, and does not affect carriage passengers by a projector light ray.

The technical scheme of the utility model as follows: a transparent projection display system for a subway shield door comprises a projector hung above a platform, a computer host connected with the projector, and a fully transparent projection screen attached to the front side of the subway shield door.

The technical scheme is applied, and the transparent projection display system further comprises a light cutting device, wherein the light cutting device comprises a first transparent polaroid arranged on the projector and a second transparent polaroid arranged on the back of the subway shielding door.

In the above-described transparent projection display system, the first transparent polarizing plate and the second transparent polarizing plate are linear polarizing plates, and light transmission directions of the first transparent polarizing plate and the second transparent polarizing plate are perpendicular to each other.

In the above-described transparent projection display system, the first transparent polarizing plate and the second transparent polarizing plate are circular polarizing plates, and the chiralities of the first transparent polarizing plate and the second transparent polarizing plate are opposite to each other.

The technical scheme is applied, the transparent projection display system is further provided with a subway station-entering and station-exiting signal detection device connected with the computer host, and the computer host is further connected with a dispatching system of the subway.

The technical scheme is applied to the transparent projection display system, and the subway station-entering and station-exiting signal detection device is an ultrasonic sensor.

The technical scheme is applied to the transparent projection display system, and the subway station-entering and station-exiting signal detection device is an infrared sensor.

The transparent projection display system is also provided with a face recognition device connected with the computer host.

The projector is a projector with an AV Mute function in the transparent projection display system.

Adopt above-mentioned scheme, compared with the prior art, the utility model discloses an adopt full transparent projection screen to paste the dress on the screen door, the installation of full transparent projection screen does not influence the transparency quality of subway screen door, and, through increasing the light cutting device, the light cutting device is transparent material equally, can save the projection/interdiction device of projector, also can save the required circular telegram/outage auto-change over device of ordinary liquid crystal membrane of adjusting luminance, simultaneously can also save train business turn over station signal detection or receiving arrangement, the system design is simplified greatly, moreover, full transparent projection screen has more scientific and technological sense than liquid crystal membrane of adjusting luminance display effect.

Drawings

Fig. 1 is a schematic view of the installation structure of the present invention;

FIG. 2 is a block diagram of the working principle of the present invention;

FIG. 3 is a block diagram of the detection principle of the ultrasonic radar of the present invention;

FIG. 4 is a topological diagram of the present invention using an infrared photoelectric switch for detection;

fig. 5 is a block diagram of the working principle of the face recognition device of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The embodiment provides a transparent projection display system for a subway platform screen door, as shown in fig. 1, the transparent projection display system includes a projector 101, a transparent projection screen 102, and a subway platform screen door 103; the projector 101 is hoisted above the platform and connected with the host computer, the host computer can be placed in a place convenient for operation, and the host computer and the projector can be connected in a single-machine wired or wireless mode and can also be in a multi-machine networking working mode, namely, each independent projection can be networked and linked by a background server; the transparent projection screen 102 is attached to the front side of the subway shield door; therefore, the transparent projection screen is applied to the subway shielded door, and various media information can be played through the control system of the computer host on the premise of not influencing the transparency of the subway shielded door.

The transparent projection display system further includes a light cutting device, wherein the light cutting device includes a first transparent polarizer 104 disposed on the projector, and a second transparent polarizer 105 disposed on the back of the screen door; cut the polaroid of light device and adopt transparent material equally, do not influence the transparency of subway shield door, subway shield door when as projection screen normal work, can not shelter from other advertisement positions, for example the lamp house advertisement of track opposite side, and, first transparent polaroid 104 with the transparent polaroid 105 of second is the linear polaroid, and, first transparent polaroid with the light direction of leading to of the transparent polaroid of second is perpendicular, plays and cuts the light effect, and the light that the projector throws like this can not see through the shield door, has avoided the influence of light to passenger in the carriage.

Alternatively, the first transparent polarizer 104 and the second transparent polarizer 105 are circular polarizers, and the first transparent polarizer and the second transparent polarizer have opposite chiralities and also function as a light-cutting function.

Another embodiment of the utility model is not to adopt and cut the light device, in order to avoid the projector light to project to the carriage and influence the passenger, just must increase the interdiction control function, through computer control program broadcast and opening/interdiction of projector signal.

As shown in fig. 2, when the subway station-entering/exiting signal detecting device detects a train station-entering signal or receives a train station-entering signal from a dispatching system of a subway dispatching room, the computer host suspends playing programs and sends a signal interruption command to the projector, such as covering a lens cover, when the subway station-entering/exiting signal detecting device detects a train station-exiting signal or receives a train station-exiting signal from the dispatching room, the computer host resumes playing programs and sends a command to the projector to switch to normal projection.

Another embodiment of the present invention is a multi-machine networking working method, i.e. each set of projection display system can be networked and linked by a background server.

The subway station in and out signal detection device can have multiple modes, preferably adopts an ultrasonic sensor, is widely applied to a reversing radar system, and has the advantages of simple structure and convenience in installation and debugging. For example, fig. 3 is a schematic block diagram of an ultrasonic radar detection, in which a signal of an ultrasonic sensor integrated with a transceiver is transmitted to an ultrasonic transmitting and echo receiving circuit, and the signal is amplified, shaped and transmitted to a computer host.

The subway station entrance and exit signal detection device can also adopt an infrared sensor, such as an infrared photoelectric switch or an infrared correlation tube. Fig. 4 is a topological diagram of detection by using an infrared photoelectric switch, wherein the infrared photoelectric switch detects signals of train entering and exiting from a station, and is connected with a computer host through a serial port module, the computer host sends a playing signal and a control signal to a projector, and the projector projects an image to a screen.

Considering that the startup and shutdown of a common projector have time delay and cannot be completed instantly, in order to avoid the influence of the light rays of the projector on passengers in a carriage after a train enters a station, the projector preferably adopts a projector with an AV Mute function, the AV Mute function immediately enables the sound and the image of the projector to disappear, the projector instantly enters a black screen state, and when the train leaves the station, the computer host sends a command to the projector to enable the projector to work normally.

Another way to realize the instantaneous disappearance of the projector signal is that the computer host switches the playing picture into a pure black picture signal after receiving the train arrival signal, thus the disappearance of the projection light of the projector can be realized without cutting off the projector.

As shown in fig. 5, a face recognition device connected to the host computer is further provided, the information of the person waiting for the user, which is shot by a face recognition camera of the face recognition device, is transmitted to the computer, the host computer automatically recognizes the information of the person waiting for the user, such as sex and age, through face recognition software installed on the host computer or in the cloud, and intelligently pushes program information in combination with a software system according to the detected information. When the number of waiting people is large, programs are intelligently pushed according to a specific algorithm. For example, if the recognition software determines that three waiting persons are likely to be three mouths, programs suitable for children can be intelligently pushed according to the ages of the children.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. The utility model provides a transparent projection display system for subway shield door which characterized in that:

the system comprises a projector which is hoisted above a platform, a computer host which is connected with the projector, and a full-transparent projection screen which is attached to the front side of a subway shielding door; and a subway station-in and station-out signal detection device connected with the computer host is also arranged, and the computer host is also connected with a dispatching system of the subway.

2. The transparent projection display system of claim 1, wherein: the subway shielding door is characterized by further comprising a light cutting device, wherein the light cutting device comprises a first transparent polarizing film arranged on the projector and a second transparent polarizing film arranged on the back of the subway shielding door.

3. The transparent projection display system of claim 2, wherein: the first transparent polarizing plate and the second transparent polarizing plate are linear polarizing plates, and the light transmission directions of the first transparent polarizing plate and the second transparent polarizing plate are perpendicular.

4. The transparent projection display system of claim 2, wherein: the first and second transparent polarizers are circular polarizers, and the chirality of the first and second transparent polarizers is opposite.

5. The transparent projection display system of claim 1, wherein: the subway station entrance and exit signal detection device is an ultrasonic sensor.

6. The transparent projection display system of claim 1, wherein: the subway station entrance and exit signal detection device is an infrared sensor.

7. The transparent projection display system of claim 1, wherein: and a face recognition device connected with the computer host is also arranged.

8. The transparent projection display system according to any one of claims 1-7, wherein: the projector is a projector with an AV Mute function.

Images