JPH0714479U - Mobile visual display - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The case itself is easy to fabricate, and the structure of the circuit system is easy to mount in the case, and the installation of the device on the tunnel wall is easy Moreover, a compact and inexpensive mobile visual display device is realized. [Structure] The case main body 20 includes a slit-shaped opening 21.
And has a substantially C-shaped cross section, with bolt rails 22 formed on both side portions, and ribs 23 to 22 formed inside.
26 is formed. The front opening 21 of the case is covered with a transparent plate 30, and a slender chassis 31 is provided in the case body 20.
Is slidably mounted in the longitudinal direction of the case, and the opening portions at both ends of the case body 20 are respectively covered with the lid members 32 and 33.
Close with. On the chassis 31, the light emitting cell array 3 and the circuit boards 35 and 36 on which the circuit system constituting the image data output means and the timing control means are mounted are mounted. The bracket 38 for mounting the device on the bolt rail 22
The fixing bolt 39a is attached so that its position can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a moving visual display device for allowing a person traveling on a train or the like to visually recognize an arbitrary image composed of a large number of pixels with a small number of light emitting elements, and particularly to a tunnel inner wall of a subway. The case and mounting structure of the device unit to be installed in

[0002]

[Prior art]

 As disclosed in JP-A-2-67589, JP-A-4-12277, JP-A-4-210702, and JP-A-4-208993, a high-intensity light emitting diode (LED) is one-dimensionally arranged. Using the linear display (light-emitting cell array) arranged in a line, the following moving visual display is used, in which the observer moves with respect to the display so that the image on the surface can be seen by the afterimage effect of the eyes. The system has been put to practical use.

A linear display is installed vertically on the wall surface of a subway tunnel, and image data in bitmap format is sequentially read from the memory line by line by the display control device, and the LED array of the linear display is arranged in each line. It is configured to drive blinking according to the data. Display output is performed when the train passes through the installation location of the linear display. At that time, adjust the display speed (line data switching cycle) according to the train speed.

When a person on a train is vaguely looking inside and outside the vehicle, the linear display moves at a high speed just outside the window. At that time, the LED array of the linear display is blinking according to the image data. Since the person in the car does not follow the linear display with eyes (because it is not possible), the linear display is scanned by the observer in the direction orthogonal to its longitudinal direction, which causes the afterimage effect. The image of the surface is visually recognized by the observer.

An image of one screen is displayed by one linear display device, but a plurality of linear display devices are installed at appropriate intervals along the subway track so that the timing of image output operation is appropriate. By controlling to, a plurality of screens can be sequentially viewed in a moving image.

Such a moving visual display system is composed of a large number of display device units each having one linear display unit as a unit, and a host computer that controls all the units, and each unit and the host computer control it. In addition to being connected with a cable, the power cable laid along each unit is also connected with each unit.

The case of each unit described above includes an LED array, which is a linear display, a drive circuit for the LED array, a memory for temporarily storing image data to be displayed, and an interface with a host computer. , A microprocessor and its associated circuits that control the control and data processing in each unit such as image data management and output, a photoelectric sensor for train detection, and a DC power supply for each part in the unit from the AC power supply input An AC / DC converter (switching power supply) is installed.

[0008]

[Problems to be solved by the device]

 The conventional moving visual display device of this type has been integrally incorporated in an elongated case made of a metal plate such as an iron plate or a stainless plate. In the manufacture of sheet metal cases, in addition to various press work, a troublesome painting process, installation of stays for mounting the circuit system inside, welding of case joints, mounting of the device on the wall Many steps are required such as mounting brackets. Also, the process of mounting the circuit system on the sheet metal case was troublesome, and it was not easy to remove or replace the circuit part for maintenance and inspection. Furthermore, in order to mount the device in a favorable arrangement in relation to passing vehicles under various conditions in the tunnel, it is necessary to adjust the mounting position of the device with respect to the wall surface at each installation site. With this device, the brackets for installation were inflexible, and it was sometimes very troublesome.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to make it easy to manufacture the case itself, and to easily mount a circuit system in the case, and to construct a tunnel. It is to realize a compact and inexpensive mobile visual display device that is easy to install the device on a wall surface and is compact.

[0010]

[Means for Solving the Problems]

 Therefore, in this invention, an elongated case body made of extruded aluminum is used. The case body has a slit-shaped opening along the longitudinal direction in the center of the front part and has a C-shaped cross section. Both sides of the case body extend along the longitudinal direction. A bolt rail is formed, and inside it, several ribs are formed along the longitudinal direction. Then, the front opening of the case body is closed by a transparent plate attached to the case body by using the predetermined rib, and a long and slender chassis is formed in the case body by using the predetermined rib. The case body is detachably mounted so that both end openings of the case body are closed by lid members. Further, a circuit board on which the light emitting cell array and the circuit system constituting the image data output means and the timing control means are mounted is mounted on the chassis, and the light emitting cell array housed in the case body is the front surface. The opening is arranged inside the transparent plate. Further, the fixing bolts of the installation bracket of the device are attached to the bolt rails of the main body case in a positionally adjustable manner.

[0011]

[Action]

 Since the case body is made of extruded aluminum, the components such as the front opening, the ribs, and the bolt rails along the longitudinal direction can be extremely easily manufactured by extrusion molding. The transparent plate and the chassis can be attached to the case body very easily by using the ribs. Since the fixing bolt of the mounting bracket is mounted on the bolt rail, its mounting and position adjustment are extremely easy.

[0012]

【Example】

 FIG. 3 shows an outline of an appearance and a mounting state of a moving visual display device according to an embodiment of the present invention. The mobile visual display device of the present invention basically comprises one unit for displaying one screen, but normally, a plurality of units are arranged at appropriate intervals along the track of the train. FIG. 3 shows two units in a display system composed of many units.

The constituent elements of one display device unit are mounted in an elongated unit case 1. The unit case 1 is vertically attached to the wall surface of the subway tunnel by the bracket 2. On the front surface of the unit case 1, there is a vertically long transparent window portion, and an LED array 3 made up of, for example, 128 LEDs is arranged on the transparent window portion facing outward. Further, a photoelectric sensor 4 for detecting the passage of a train is arranged on the lower front portion of the case 1 toward the outside. A large number of these display units mounted on the wall of the tunnel along the track of the subway are connected to the commercial AC power supply cable 5 in the imozu style, and are also connected to the signal cable 6 to be described later in the imozu style. .

FIG. 4 shows a schematic configuration of a circuit system built in one display device unit. In this circuit system, the one-chip microcomputer 7 performs overall timing control and main data processing. In FIG. 4, bit-mapped image data (supplied from the host computer as described later) is stored in the memory 9. During the display operation, the memory 9 is accessed by the address counter 8 to sequentially read the image data, and the serial / parallel conversion circuit 10 aligns the image data by a predetermined number of bits and transfers it to the line buffer 11. The display driver 12 turns on or off the individual LED elements of the LED array 3 according to the image data for one line in the buffer 11.

The timing control of the above display operation is performed by the microcomputer 7 in accordance with the passing situation of the vehicle. The detection signal of the photoelectric sensor 4 of the unit is input to the microcomputer 7, and the detection signal of the photoelectric sensor of the unit installed in the preceding stage in the traveling direction of the train is also input to the microcomputer 7. Based on these detection signals, the speed information of the passing train and the passing timing of the unit are determined, and the timing of the display operation and the output speed are appropriately controlled. Further, the microcomputer 7 of each unit is connected to the host computer (not shown) via the communication interface 13 and the signal cable 6, and also controls the writing (rewriting) of the image data given from the host computer in the memory 9. To do.

The device of this embodiment can use the existing AC power supply equipment installed in the subway tunnel. There is a power supply connector 14 on the circuit board built in each unit case 1, and the AC power supply cable 5 is connected thereto in an immovable manner. An AC / DC converter 15 (so-called switching power supply) is mounted on the circuit board in the case 1, and the AC power supply input applied to the power supply connector 14 is converted into a stable direct current of a predetermined voltage. The DC output of the AC / DC converter 15 is supplied as an operating power source for the logic circuit section such as the micro computer 7, the memory 9 and its peripheral circuits, the train sensor 4, the communication interface 13 (the power supply line is shown in the figure. Not).

A nickel-cadmium secondary battery 17, a capacitor 18 having a relatively large capacity in parallel with the battery 17, and a secondary battery 17 by the output of the AC / DC converter 15 are provided on the circuit board in the case 1. A charging control circuit 16 for charging is mounted. The circuit configuration is such that the terminal voltages of the secondary battery 17 and the capacitor 18 serve as a driving power source for the LED array 3. The charging control circuit 16 detects the charging voltage of the secondary battery 17 and transmits it to the microcomputer 7, and the microcomputer 7 controls the charging control circuit 16 as appropriate according to the charging voltage information, and the charging operation is performed during the idle period of the display operation. The charging current is appropriately controlled so that the secondary battery 17 is sufficiently charged for the display operation of.

Next, the detailed structure of the unit case 1 of the display device, which is the main part of the present invention, will be described in detail with reference to FIGS. 1 and 2.

The case body 20, which is the main body of the unit case 1, is made of an extruded material of aluminum. The case main body 20 has a slit-shaped opening 21 extending in the longitudinal direction substantially in the center of the front surface portion thereof, and has a substantially C-shaped cross section. The bolt rail 22 is formed, and several ribs 23 to 26 along the longitudinal direction are integrally formed therein by extrusion molding.

Then, a transparent plate 30 is set in the front opening 21 of the case body 20 so as to be inserted into the ribs 23 formed on both inner sides thereof, and the front opening 21 is set by the contact plate 30. Is blocked. This portion is the transparent window portion.

Further, the case main body 20 has a slender chassis 31 made of an iron plate built therein. The circuit system described above is mounted on the chassis 31. The length of the chassis 31 is substantially equal to that of the case body 20, and the width thereof is substantially equal to the width inside the case body 20. The chassis 31 is slidably inserted into a space between the step inside the bolt rail 22 of the case body 20 and the rib 24 and set in the case body 20.

The opening at the upper end of the case body 20 is closed by the lid member 32 shown in FIG. 3, and the opening at the lower end of the case body 20 is closed by the lid member 33 attached to the chassis 31. That is, when the chassis 31 is inserted all the way into the case body 20, the lid member 33 is applied to the lower end opening, and the tapping screw 34 is screwed into the hole-shaped ribs 25 and 26 having slits of the case body 20. The lid member 33 and the chassis 31 are fixed with. The upper lid member 32 is also fixed to the hole-shaped ribs 25 and 26 of the case body 20 with a tapping screw.

The circuit system described above is appropriately divided and mounted on the circuit boards 35 and 36, etc., and the whole is mounted on the chassis 31. That is, the entire circuit system is mounted on the chassis 31, and the chassis 31 can be slidably attached to and detached from the case body 20 to perform maintenance and inspection of the circuit system.

The LED array of the circuit system is mounted on the circuit board 35, and when the chassis 31 is completely housed in the case body 20, the transparent plate set in the front opening 21 of the case body 20. The LED array 3 is arranged at a predetermined position inside 30.

Further, the photoelectric sensor 4 for train detection is directly attached to the lower end portion of the chassis 31, and when the chassis 31 is housed in the case, the light emitting and receiving surface of the photoelectric sensor 4 is located at the front opening of the case. It is arranged at a predetermined position inside the transparent plate 30 of 21. As described below, it is necessary to finely adjust the direction of the photoelectric sensor 4 after mounting the device unit on a tunnel wall surface or the like. Therefore, as shown in FIG. 1, the photoelectric sensor 4 is equipped with optical axis adjusting screws 4a and 4b. An operation hole 27 is formed in the case body 20 and an operation hole 33a is formed in the lid member 33 so that the adjusting screws 4a, 4b can be operated from outside the case. Removable caps 37 are attached to these holes.

To mount the display device unit configured as described above on a site such as a tunnel wall surface, a bracket 38 as shown in FIGS. 2 and 3 is used. The bracket 38 in this embodiment is made of an L-shaped metal fitting, and long holes are formed in both of its two portions. As means for fixing the bracket 38 to the case body 20, bolt rails 22 provided on both sides of the case body 20 are used, and are fastened by bolts 39a and nuts 39b as shown in FIG. Since the fixing bolt 39a can freely slide along the bolt rail 22, the mounting position of the bracket 38 can be freely moved according to the situation of the installation site. Further, since the bracket 38 can be easily attached and detached, it is possible to use a bracket having an appropriate shape and size according to the situation at the site.

The light emitting cell array is not limited to the LED array 3 of the embodiment, and other devices such as a combination of a liquid crystal shutter array and a backlight, a combination of a PLZT shutter array and a back light, and a fluorescent display tube are used. It is possible to apply the present invention in that case as well.

[0028]

[Effect of device]

 As described in detail above, in this invention, the case body is made of the extruded aluminum material, so that the components such as the front opening, the ribs, and the bolt rails along the longitudinal direction can be extremely easily formed by extrusion molding. It can be manufactured. The transparent plate and the chassis can be easily attached to the case body by using the ribs, and the fixing bolt of the installation bracket is attached to the bolt rail. Position adjustment work is extremely easy. In this way, the manufacturing of the device unit is facilitated, the installation work of the device unit on the site is facilitated, and the highly practical device can be mass-produced at low cost.

Further, since the case body is made of an extruded aluminum material, it is easy to reduce the size and weight of the entire case, and this also facilitates the installation work. Furthermore, the case itself is extremely resistant to rust, and even if it is processed to prevent rust, it can be done easily.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing a case structure of a movable visual display device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the device of the above embodiment.

FIG. 3 is a front view showing an appearance and an installed state of the apparatus according to the above embodiment.

FIG. 4 is a block diagram showing a schematic configuration of a circuit system incorporated in the apparatus of the above embodiment.

[Explanation of symbols]

1 Unit Case 3 LED Array 4 Photoelectric Sensor 5 AC Power Cable 6 Signal Cable 7 Microcomputer 9 Image Data Memory 15 AC / DC Converter 16 Charge Control Circuit 17 Secondary Battery 20 Case Body 21 Front Opening 22 Bolt Rail 23-26 Rib 27 adjustment operation hole 30 transparent plate 31 chassis 32, 33 lid member 34 tapping screw 35, 36 circuit board 38 bracket

Claims (2)

[Scope of utility model registration request] 1. A light emitting cell array in which a large number of light emitting cells are linearly arranged, and image data output means for sequentially supplying a predetermined amount of image data to be displayed to the light emitting cell array and driving the display. A timing control means for operating the image data output means at an appropriate speed in response to passage information of the observation moving body, and the image data when the observer moves in the vicinity of the device together with the moving body. In the moving visual display device in which the image of the light emitting cell array driven for display by the output means is scanned on the retina of the observer, so that the intended image is visually recognized by the observer due to the afterimage effect. The case body is an elongated shape made of extruded aluminum, and has a slit-shaped opening along the longitudinal direction in the center of the front part of the case body. Has a substantially C shape, bolt rails along the longitudinal direction are formed on both side portions thereof, and some ribs along the longitudinal direction are formed inside the rails. The opening is closed by a transparent plate attached to the case body by using the predetermined rib, and a slender chassis is slidably mounted in the case body in the longitudinal direction of the case by using the predetermined rib. A circuit board on which the light emitting cell array and the circuit system that constitutes the image data output means and the timing control means are mounted on the chassis. And the light emitting cell array housed in the case body is arranged inside the transparent plate in the front opening, and Fixing bolt mounting bracket of the apparatus in the bolt rail moves viewing type display device, characterized in that mounted for position adjustment. 2. A train detection photoelectric sensor is attached to the circuit board, and the photoelectric sensor housed in the case body is arranged inside the transparent plate in the front opening, and the body case is provided. 2. The moving visual confirmation according to claim 1, wherein a hole for an angle adjusting operation of the photoelectric sensor inside is formed at a predetermined position of, and a cap is detachably attached to the operating hole. Display device.