JP2007172185A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of displaying a circular signal and a complicated character signal shape. <P>SOLUTION: This display device comprises a light emitting element unit 14 including a plurality of light emitting elements 13 disposed so as to form a circular outer circumference, the adjacent light emitting elements 13 being disposed in surface shape at vertically and laterally equal intervals. The light emitting element unit 14 is composed of an information display unit 15 including light emitting elements 13 showing a character symbol shape, and a non-information display unit 16 including the light emitting elements 13 other than the information display unit 15. When the whole light emitting unit 14 is displayed, the information display unit 15 and the non-information display unit 16 are lighted, and when the character symbol shape is displayed, the information display unit 15 is lighted, while the non-information display unit 16 is extinguished. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device.

  When the light emitting diode 100 is used in a conventional traffic signal device, as shown in FIG. 5, a plurality of light emitting diodes 100 are arranged at substantially constant intervals in the radial direction and the circumferential direction in the signal portion 101 having a circular outer periphery. The outer periphery is circular. FIG. 6 shows a wiring circuit of such a light emitting diode 100, and DC power obtained by rectifying commercial power is supplied between the plus and minus terminals in FIG. In this wiring circuit, a plurality of basic circuits in which a plurality of light emitting diodes 100 connected in series and a resistor R for a current limiting function or the like are connected in series are connected in parallel.

  Similarly, a conventional display device (= signal device) is disclosed in Patent Document 1 below. For example, in a traffic signal in a three-color signal part (blue, yellow, red) whose outer periphery is circular, in one signal part (= traffic signal module), for example, a display and display of a blue signal and an arrow are displayed. It is disclosed. As disclosed in FIGS. 3 and 11 of this publication, in the traffic light module, a plurality of light emitting diodes 12 are arranged at substantially constant intervals in the radial direction and the circumferential direction, and the outer circumference is circular. In the plurality of light emitting diodes 12, a large number of light emitting diodes 12 are arranged so as to have an arrow shape pointing to the right to form a first LED lamp group 13 (arrow signal portion), and a circular surface shape surrounding the first LED lamp group 13. The second LED lamp group 14 is arranged in a large number so that As a result, the entire light emitting diode 12 has a circular surface shape and constitutes the blue signal portion 11. The first LED lamp group 13 is driven to emit light by the first light emission drive circuit 21, and the first LED lamp group 13 and the second LED lamp group 14 are driven to emit light simultaneously by the second light emission drive circuit 22. With the above configuration, the function as the blue signal unit 11 and the function as the arrow display are achieved by the single signal unit 11.

Thereby, lighting control of the blue signal part 11 and the arrow signal part is attained only by attaching the 1st and 2nd light emission drive circuits 21 and 22 to the control system of a general traffic signal apparatus.
JP-A-10-261197

  In the conventional signal section described above, since the light emitting diodes 12 are arranged at substantially constant intervals in the radial direction and the circumferential direction, the first LED lamp group 13 (arrow signal 13) which is the light emitting diodes 12 positioned on the arrow shape. Part) is lit.

  However, when displaying a complicated character / symbol shape as compared with the arrow shape, the light emitting diodes 12 arranged at a substantially constant interval in the radial direction and the circumferential direction are positioned on the complicated character / symbol shape. Not. Therefore, it is difficult to light up and display a complicated character / symbol shape with the light emitting diodes 12 arranged at substantially constant intervals in the radial direction and the circumferential direction.

The present invention has been made to solve the above-described problems,
An object of the present invention is to provide a display device capable of displaying a circular signal display and a complicated character signal shape as compared with an arrow shape in a light emitting element unit in which a plurality of light emitting elements are arranged so as to have a circular outer periphery. To do.

  The present invention is a display device comprising a light emitting element unit in which a plurality of light emitting elements are arranged so as to have a circular outer periphery, and the adjacent light emitting elements are arranged in a planar shape so as to be equally spaced vertically and horizontally, The light emitting element unit includes an information display unit composed of the light emitting element representing a character symbol shape and a non-information display unit composed of the light emitting element other than the information display unit, and when displaying the entire light emitting element unit When the information display unit and the non-information display unit are turned on to display the character / symbol shape, the information display unit is turned on and the non-information display unit is turned off. The light emitting element is a light emitting diode.

  In the present invention, a plurality of light-emitting elements are arranged so that the outer periphery is circular, and adjacent light-emitting elements are arranged in a planar shape so as to be equally spaced vertically and horizontally. Since a plurality of light emitting elements are arranged at equal intervals in the vertical and horizontal directions, that is, in a dot matrix shape, an information display unit composed of light emitting elements representing various character symbol shapes is turned on as an information display unit, and the character symbol shape is Can be displayed. In addition, by turning on and off the entire light emitting element unit, it can be used as a circular display.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a display device of the present invention, which includes a light emitting element unit 14 that is a circular display unit 10 and is used for a traffic signal or a display device installed near an entrance area to a facility. An example is shown.

  The display device of the present embodiment includes a display main body 1 and a control main body 2 that controls the display thereof. The control main body 2 is fixed to the column 3 and has a box-shaped appearance, and an electronic circuit or the like is accommodated in the box as will be described later. The display main body 1 includes a rectangular plate-like display plate 12 fixed to the upper part of the column 3, and the display plate 12 has circular and planar display units 10, 10, and 10. In FIG. 1, a display unit 10 that is lit in blue, a display unit 10 that is lit in yellow, and a display unit 10 that is lit in red are arranged from the left side of the drawing.

  Details of each display unit 10 will be described with reference to FIG. The display unit 10 is installed on the front surface of the display main body 1, and a light emitting element 13, which is a plurality of light emitting diodes, is disposed on a substrate 11 having a circular outer periphery. Electrical wiring (not shown) is provided. As the light emitting diode of the light emitting element 13, a well-known bullet-type light emitting diode can be used, and blue, yellow, and red light emitting diodes are used according to the color of each display unit 10.

  As shown in the drawing, the plurality of light emitting elements 13 are arranged so that the outer periphery is circular, and the adjacent light emitting elements 13 are arranged in a plane shape at equal intervals in the vertical and horizontal directions. These light emitting elements 13 form a light emitting element unit 14. Thus, arranging the light emitting elements 13 at equal intervals in the vertical and horizontal directions can be said to be a dot matrix arrangement or an arrangement capable of displaying text.

  The light emitting element unit 14 includes an information display unit 15 including a light emitting element 13 representing a character or symbol shape, and a non-information display unit 16 including a light emitting element 13 other than the information display unit 15. In FIG. 2, the light emitting element 13 of the information display unit 15 is shown in black as a lighted state, and displays the shape of a “stop” character. When displaying the character symbol shape, the information display unit 15 is turned on (shown in black in FIG. 2), and the information non-display unit 16 is turned off (shown in white in FIG. 2). The character symbol shape of the information display unit 15 can be displayed. Moreover, when displaying the whole light emitting element unit 14, the information display unit 15 and the non-information display unit 16 are lighted.

  Then, for example, in the three display units 10 of FIG. 1, as will be described later, power is supplied from the control body 2 as a backup power source in the event of a power failure, and the character / symbol shape of the information display unit 15 is “stop” from the left. By displaying “electricity” and “medium”, the user can understand that the display device is out of power.

  In addition, characters such as “congested”, “accident”, “fire”, “closed”, etc. can be sent to the display device of the embodiment by an external operation such as a management center. Symbol information can be displayed. By performing such a display, it is possible to provide a lot of information with the display device of this embodiment without installing a display device for displaying these information separately, thereby reducing accidents and traffic congestion. It can be used for mitigation.

  Next, the electrical circuit configuration, operation, and the like of this embodiment will be described with reference to FIGS. FIG. 3 shows an electric circuit of the light emitting element 13 in the display unit 10, and a plurality of basic circuits in which a plurality of light emitting elements 13 connected in series and a resistor R for a current limiting function or the like are connected in series are connected in parallel. Thus, DC power is applied to both ends. A plurality of basic circuits are connected in parallel to form the information display unit 15 and the non-information display unit 16 of the light emitting element 13. The information display unit 15 and the non-information display unit 16 have a circuit configuration in which direct current power is separately applied to control lighting.

  As shown in FIG. 4, the control main body 2 includes an AC / DC converter 21 that converts commercial power into direct current, and a DC / DC converter 22 that supplies the output to the display unit 10 as optimal direct current power. Yes. The output from the DC / DC converter 22 is separately supplied to the information display unit 15 and the non-information display unit 16 of the three display units 10 via the display control unit 23.

  Under normal conditions, DC power is supplied to both the information display unit 15 and the non-information display unit 16 under the control of the display control unit 23, the entire light emitting element unit 14 is displayed, and the display unit 10 is turned on in a circle. To do. When used as a traffic light of red, blue and yellow, control is performed so that red, blue and yellow are turned on and off at predetermined intervals.

  Furthermore, the control body 2 has a backup function for supplying power to the display unit 10 at the time of a power failure as follows.

  A charging circuit 30 for charging a secondary battery 31 made of a lithium ion battery or the like by DC power from the AC / DC converter 21 and a state for monitoring the state of the secondary battery 31 and controlling a backup function of the secondary battery 31 A control unit 32 composed of a microcomputer or the like is provided.

  The control unit 32 monitors the capacity of the secondary battery 31, and when the capacity is reduced to a predetermined recharge capacity, the charging of the secondary battery 31 is performed using the charging circuit 30 with commercial power as a supply source. If full charge is detected, the charging circuit 30 is shut off to stop charging. Thereafter, when the secondary battery 31 consumes power as a backup during a self-discharge or power failure and the predetermined recharge capacity is reduced, charging is performed as described above.

  Moreover, the power failure signal from the power failure monitoring circuit 33 for commercial power is obtained, and the control circuit 32 turns on the discharge circuit 34 to supply the power from the secondary battery 31 to the DC / DC converter 22 at the time of power failure. Thus, power can be supplied to the display control unit 23 and the display unit 10 during a power failure.

  With the above configuration, in this embodiment, when commercial power is cut off during a power failure, the display control unit 23 can be driven using the power of the secondary battery 31 to turn on the display unit 10. . In this embodiment, the display control unit 23 supplies power to the information display unit 15 to turn on, and does not supply power to the information non-display unit 16 and turns off. It is possible to display “stop”, “electricity”, and “medium” which are character and symbol shapes of the information display unit 15.

  Furthermore, the display controller 23 of the control body 2 can have the following functions. First, the display unit 10 is a dot matrix display of a light emitting diode that is already known and is sold, and the display control unit 23 displays an information display that is a light emitting diode that represents a desired character symbol shape on such a display. Provide a control function to turn on the unit and turn off the other non-information display units. Further, the display control unit 23 receives operation information from the outside such as a management center and displays the desired character / symbol shape. As such a desired character / symbol shape, information on character / symbols such as “in a traffic jam”, “accident”, “fire”, “no traffic”, and the like can be displayed. Such information may be displayed one character at a time on each display unit 10 or may be displayed on one display unit 10 one character at a time as time passes. By performing such display, a large amount of information can be provided by the display device of this embodiment without installing a separate display device for displaying such information.

  As a result, in the event of a disaster, it is possible to notify the passing people of the occurrence of abnormalities using information on characters and symbols, preventing secondary disasters and confusion, reducing accidents and reducing traffic congestion, etc. It is possible to help.

It is a schematic perspective view which shows the display apparatus of one Example of this invention. It is a front view which shows the display part (= light emitting element unit) in the display apparatus of one Example of this invention. It is a figure which shows the electric circuit of the display part in the display apparatus of one Example of this invention. It is a block diagram of the electric circuit in the display apparatus of one Example of this invention. It is a front view which shows the signal part of a prior art example. It is an electric circuit of the signal part of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display main body 2 Control main body 13 Light emitting element 14 Light emitting element unit 15 Information display unit 16 Non-information display unit

Claims (2)

A display device comprising a light emitting element unit in which a plurality of light emitting elements are arranged so as to have a circular outer periphery, and the adjacent light emitting elements are arranged in a plane shape so as to be equally spaced vertically and horizontally,
The light emitting element unit is composed of an information display unit composed of the light emitting element representing a character symbol shape and a non-information display unit composed of the light emitting element other than the information display unit,
When displaying the entire light emitting element unit, turn on the information display unit and the non-information display unit,
When the character symbol shape is displayed, the information display unit is turned on and the non-information display unit is turned off. The display device according to claim 1, wherein the light emitting element is a light emitting diode.

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