JP3135483U - Rotating display device - Google Patents

Abstract

Provided is a simple and reliable rotary display device in which light emitting diodes arranged on a circumference are sequentially turned on, and light emitting diodes of a plurality of colors are selectively switched or simultaneously turned on.
The output of an oscillator such as a timer IC is input to a Johnson counter, and the cathodes of the light emitting diodes arranged on the circumference are driven one by one by the output, and the anode side of the multicolor light emitting diode is Commonly connected for each color, the power supply side is fed together for each color using a PNP transistor, etc., and all power supplies are a single power supply of about 5V, and can be driven by the bus power of the personal computer's USB terminal. A highly functional rotary display device is provided in a small and inexpensive manner.
[Selection] Figure 1

Description

The present invention relates to a device that displays attention information, warning information, and the like using light emitting diodes.

Conventionally, there has been a device that displays the light of a lamp fixed at the center as a rotating lamp that shows attention information with light in a vehicle or factory, etc., by a reflecting mirror that is rotated by a motor, but by switching lighting of light emitting diodes of multiple colors No small device has been developed to display at a glance.
JP-A-7-282603 Registered utility model No. 3006164

However, the device that displays the light of the lamp fixed at the center with a reflecting mirror that is rotated by a motor has a problem of life and reliability due to the use of mechanical parts, and has a defect if it is difficult to reduce the size.

The present invention divides a rectangular wave output generated by a built-in oscillator by a counter circuit, sequentially switches on and turns on a plurality of light emitting diodes arranged on the circumference through a drive circuit, and makes it appear as if the light source rotates. Thus, a small and highly reliable rotary display device is provided.
Furthermore, it is possible to provide a thin display device in which red, yellow, and green light emitting diodes are arranged in the vertical direction, and a rotary display device that is very small and can switch between multiple colors by using light emitting diodes in the same package of three colors. .

The rotary display device according to the present invention uses light emitting diodes of multiple colors with high reliability and low power consumption as the light source, and is more reliable than a conventional method in which a conventional reflecting mirror is rotated by a motor in order to sequentially turn on an electronic circuit. Long life can be realized. Furthermore, since there are no mechanical parts, there is an advantage that a free design that suits the purpose and space, such as an elongated shape or a micro size, is possible. In addition, taking advantage of the electronic method, the rotation speed can be freely set, and a free display form such as flashing simultaneously can be designed, and a highly reliable device can be configured by low power consumption and low heat generation.

FIG. 1 shows the basic configuration of the present invention. Reference numeral 1 denotes a display unit formed of a cylindrical transparent or translucent plastic or glass material, and a circular substrate in which red light emitting diodes are arranged on the circumference. 2 and a circular substrate 3 in which yellow light-emitting diodes are arranged on the circumference and a circular substrate 4 in which green light-emitting diodes are arranged on the circumference are fixed at regular intervals. Reference numeral 5 denotes a support member for fixing the cylindrical display unit. Of course, it can be configured in a square, pentagon, or any other shape according to the number of light emitting diodes.

Reference numeral 6 denotes an oscillator whose frequency can be adjusted by an external capacitor C and resistor R, and its output is input to a counter circuit 7. The output of the counter circuit 7 is input to the light emitting diode driving circuit 8, and a driving current is supplied to the substrates 2, 3 and 4 on which the three light emitting diodes are arranged. A lighting control circuit 9 selectively switches on and turns on the three color light emitting diodes.

  FIG. 2 shows an embodiment of a light-emitting diode lighting circuit having the above configuration. IC1 is an oscillation circuit using NE555N which is a general-purpose timer IC, and an oscillation frequency f is a rectangular wave determined by f = 1.44 / (R1 + 2 * R2) / C2 by an external capacitor C2 and resistors R1 and R2. Can occur. By switching the capacitor C2 and the resistors R1 and R2 to different values using switches, the oscillation frequency can be freely changed, and the apparent rotation speed can be switched. The oscillator can be easily configured by a multivibrator using individual components, a crystal oscillation circuit, or other circuits.

  IC2 is a decimal Johnson counter, and 74HC4017 and the like are commercially available as general-purpose products. The system diagram is shown in FIG. 4, and the timing is shown in FIG. The rectangular wave signal input to the CK terminal is frequency-divided and the 10 output terminals from Q0 to Q9 are sequentially changed to a high level, and after the Q9 terminal has changed from a high level to a low level, the Q0 terminal again Go higher in order. The counter circuit of IC2 can also be configured with a microcomputer or gate array circuit having an equivalent counter function, and in addition to turning on 10 light emitting diodes in turn using its programming function, it is at the target position 180 degrees, for example Turn on the first and sixth, second and seventh, etc., first turn on the first and second light emitting diodes at the same time, then turn on the second and third at the same time, and turn on two at a time It can be applied.

IC3 is a light emitting diode driving circuit. For example, when the output terminal of Q0 changes to a high level, the output terminal 2 of one driving stage of IC3 becomes conductive, and three light emitting diodes can be driven through the resistor R3. Similarly, the same drive circuit is connected to each of the output terminals Q1 to Q9 of the counter circuit IC2, and 10 groups of three light emitting diode groups of red, yellow and green are driven in order. In addition, even if it uses neither an IC nor an NPN transistor, it can be driven in exactly the same way.

The anode side of the group of 10 groups of three light emitting diodes of red, yellow and green is commonly connected for each emission color, and is connected to the collectors of the PNP transistors TR1 to TR3. The bases of these TR1 to TR3 are connected via resistors. The switch SW1 to SW3 can be switched between ground and open. As an example, if SW1 is conductive and SW2 and SW3 are non-passive, only the PNP transistor TR1 is turned on. At this time, only ten red light emitting diodes are lit in order, and become a red rotating lamp. Similarly, when SW2 and SW3 are turned on, the yellow and green light emitting diodes are sequentially turned on and rotated. Of course, when all of SW1, SW2, and SW3 are turned on, the red, yellow, and green light emitting diodes are turned on sequentially.

According to this circuit configuration, a total of 30 light-emitting diodes of red, yellow, and green can be driven with 10 cathode connections and anodes can be shared for each color. Display is possible.

FIG. 3 shows an embodiment of a rotating lamp constituted by a light emitting diode 11 in which chips of three colors are incorporated in the same package. A schematic diagram of the light emitting diode 11 is shown in FIG. 6, and the internal electrical connection is shown in FIG. The common three-color light emitting diode 11 has a cathode connected in common, and the circuit of FIG. 2 can be used as it is for driving. If this three-color light emitting diode 11 is used, a three-color rotating lamp can be constituted by a single circular substrate, and a more compact rotating display device can be provided. Although the above has been described with respect to the display of three colors, of course, a rotating lamp of four or more colors added with blue or the like can be easily configured in the same manner. All the control circuits and light emitting diodes shown in the embodiments of the present invention can be driven by a single power source of 5V, and can be lit by the bus power by connecting to a USB terminal of a personal computer or the like.

The rotation display device using the present invention can be used for emergency vehicles, factory lines, offices, and most other fields that require attention and warning display.

It is a whole block diagram of the rotation display apparatus concerning this invention, and shows the practical example which has arrange | positioned a total of 30 light emitting diodes of red, yellow, and green on three circular substrates, respectively. An example of the light-emitting-diode drive circuit diagram of the rotation display apparatus concerning this invention is shown. The whole block diagram of the rotation display apparatus using the light emitting diode with which the chip | tip of 3 colors was integrated in the same package is shown. The system figure of the decimal Johnson counter used for this invention is shown. The timing diagram of the decimal Johnson counter used for this invention is shown. 1 is a schematic view of a light emitting diode in which three color chips used in the present invention are incorporated in the same package. FIG. An internal electrical connection diagram of a light emitting diode in which three color chips used in the present invention are incorporated in the same package is shown.

Explanation of symbols

1. Rotating indicator lamp body 2. Red display board 3. Yellow display substrate 4. Green display substrate 5. Rotating indicator light support member 6. Oscillator circuit 7. Counter circuit 8. Light emitting diode drive circuit Lighting control circuit 10. 10. Red, yellow and green 3 color display board 11. Red, yellow and green light emitting diode USB port

Claims (3)

A plurality of light emitting diodes are arranged on the circumference, and a substrate on which light emitting diodes of different colors are similarly arranged is arranged at regular intervals in the vertical direction, and the output from an oscillator capable of switching the frequency is a Johnson counter circuit, or Light emitting diodes arranged on the circumference through a drive circuit such as an NPN transistor by a plurality of outputs that are input to a microcomputer or gate array circuit having an equivalent counter function and switched to a high voltage one terminal at a time in the order of the counter circuit The cathode is driven through a resistor and mounted on each substrate by a switch means such as a PNP transistor that can be set from the outside. A rotating display device that can switch the lighting color arbitrarily. A multi-color LED with built-in multiple color chips in one plastic package is arranged on the circumference, and the output from the oscillator whose frequency can be switched is a Johnson counter circuit, or a microcomputer with an equivalent counter function. The cathode of the light emitting diode is driven through a resistor through a drive circuit such as an NPN transistor by a plurality of outputs that are input to a gate array circuit and switched to a high voltage one by one in the order of the counter circuit, and set from the outside A rotary display device that can be arbitrarily switched in lighting color of light emitting diodes by controlling energization to the anodes of light emitting diodes that are mounted on each substrate by switch means such as possible PNP transistors and whose anodes are commonly connected. A rotating display device that enables a rotating power supply of the rotating display circuit by the light emitting diode to be a single power source of about 5 V, and can be lit by the bus power by connecting to a USB terminal of a personal computer or the like.

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