JP3065679U - Light emitting device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a light emitting device driven by a battery with a change in time interval for complicated light emission and blinking, and to reduce the cost and simplify the control circuit. In addition, labor saving will be performed so as to cope with the life of small batteries. SOLUTION: An oscillator circuit utilizing characteristics of a semiconductor IC constituting a circuit has been devised to realize complicated light emission and blinking. The size, cost, and simplicity have been reduced in consideration of the latest IC packages. In addition, dimming the light emission to the brightness around the light emitting device, stopping the light emission when dark,
Power saving was implemented.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a light-emitting device in which a plurality of LED elements are driven by a battery to emit light and blink.

[0002]

[Prior art]

 Conventionally, a device that only emits light with simple blinking or lighting is made of a general-purpose IC, and a device having a complicated blinking function such as date writing of a camera is realized by a dedicated IC or the like.

[0003]

[Problems to be solved by the invention]

 The challenge was to make complex light emission and blinking of a plurality of LED elements with a simplified control circuit using a commercially available general-purpose IC, and to save power to extend battery life.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the light emitting device of the present invention has a circuit configuration developed in consideration of the functions of existing or new general-purpose ICs. For example, the number of circuits was reduced, and two-circuit packages were used instead of four-circuit IC packages, and surface-mount devices such as SOP and SSOP packages were used instead of DIP packages.

In order to save labor, a light control function is added to the light emitting device by using a phototransistor. As a result, when the light became dark, light emission was weakened, and light emission could be stopped.

[0006]

[Embodiment of the invention]

 An embodiment of the invention will be described with reference to the drawings. 1 and 2, the circuit of the light emitting device is roughly divided into a control circuit 1, an LED circuit 5, and a battery circuit 6. More specifically, in the control circuit 1, a pulse signal is generated by the oscillation circuit 2a or 2b, and is converted into a plurality of pulse signals by the logic circuit 3 in the next stage. In the next drive circuit 4, the phototransistor 44 detects a light flux corresponding to the brightness around the light emitting device, and the bipolar transistor 41 controls the drive current of the LED circuit 5 in an analog manner to control the light emission intensity. I do.

The oscillation circuit 2a shown in FIG. 1 generates three pulse signals at a low frequency as a ring oscillation circuit. This low frequency is realized without using a frequency dividing circuit by increasing the time constant of the external resistor 2a2 and the capacitor 2a3 by utilizing the characteristic of the high impedance input of the inverter circuit 2a1 of the CMOS element.

The oscillation circuit 2b in FIG. 2 oscillates a pulse signal having a low frequency and a different duty in a CR oscillation circuit. This low frequency is realized by increasing the time constant similarly to the oscillation circuit 2a, and the difference in the duty of the pulse signal is realized by using the diode 2b5.

In addition, the oscillation circuit 2b of FIG. 2 applies a pulse signal to the level shifter circuit 2b7, feeds back its output through the addition circuit 2b8, and generates a plurality of random pulse signals from the level shifter circuit 2b7. I have.

In FIG. 3, a light emission waveform diagram 7a shows the case of the oscillation circuit 2a of FIG. 1, and the light emission of the LED elements (51, 52, 53) is repeated without overlapping.

FIG. 7B shows a light emission waveform in the case of the oscillation circuit 2b of FIG. 2, in which light emission is repeated including light emission and blinking of the LED elements (51, 52, 53).

FIG. 4 is an example of an actual external view of the light emitting device. An external view example A 1 is a case where the LED elements (51, 52, 53) and the phototransistor 44 are directly mounted on the printed circuit board 9.

FIG. 5 is an example of an external view of the light emitting device. An external view A2 is an example in which the LED elements (51, 52, 53) and the phototransistor 44 are connected to a bendable wire 8 and a printed circuit board 9 is formed. This is the case when implemented in.

[0014]

【Example】

 The embodiment will be described with reference to the drawings. In the external view example A1 of the embodiment of FIG. 4, when the LED elements (51, 52, 53) perform flashing of light emission as shown in FIG. While holding, display the sequence in a flowing manner and repeat.

In the example A2 of the external view of the embodiment shown in FIG. 5, when the LED elements (51, 52, 53) emit and blink as shown in an emission waveform diagram 7b, the blinking becomes complicated, and the LED element to be turned on next Is difficult to predict, and if the emission colors of the LED elements are set to different colors, they are displayed colorfully and repeated.

The circuits shown in FIGS. 1 and 2 are existing and new general-purpose ICs or the like, and are assembled in a compact and simplified form by making full use of new printed circuit board technology. For example, except for the battery circuit 6, the size could be reduced to 20 mm × 30 mm × 5 mm or less.

In the circuits shown in FIGS. 1 and 2, dimming and power saving are performed by the oscillation circuits (2a, 2b) using the CMOS elements, the logic circuit 3, and the phototransistor 44. Could be lengthened. For example, the AA alkaline battery could continue operation for 2-3 months or more, and the CR2032 button battery could continue operation for several tens of hours or more.

[0018]

[Effect of the invention]

 As shown in the example, the complicated light emission and blinking of the LED element could be operated in a small, inexpensive, simple, and long life by battery drive. This function could be applied as a practical product to a wide variety of display equipment for jewelry, office use, and sales promotion.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of a light emitting device of the present invention.

FIG. 2 is an oscillation circuit diagram of another solution of the oscillation circuit of the present invention.

FIG. 3 is a light emission waveform diagram of the light emitting device of the present invention.

FIG. 4 is an external view example A1 of the embodiment of the light emitting device of the present invention.

FIG. 5 is an external view example A2 of the embodiment of the light emitting device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Control circuit 2a, 2b Oscillation circuit 2a1, 2b4 Inverter circuit 2a2, 2b1, 2b2, 2b3, 42, 43 Resistance 2a3, 2b6 Capacitance 2b5 Diode 2b7 Shift register circuit 2b8 Addition circuit 3 Logic circuit 31 NAND circuit 4 Drive circuit 41 Bipolar transistor 44 Phototransistor 5 LED circuit 51, 52, 53 LED element 6 Battery circuit 61 Battery 7a, 7b Light emission waveform diagram 71a, 71a, 73a Waveform diagram for oscillation circuit 2a 71b, 71b, 73b Waveform diagram for oscillation circuit 2b 8 Bendable wire rod 9 Printed circuit board A1, A2 Outline drawing example

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[Procedure amendment]

[Submission date] August 10, 1999 (1999.8.1
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (4)

[Utility model registration claims] In a light-emitting device using a battery circuit as a power source, a pulse signal is generated by an oscillation circuit, and the pulse signal is driven by a driving circuit having a dimming function to drive an LED circuit.
A device that emits light and blinks as shown in FIG. 7A. 2. An oscillator circuit 2a is replaced by an oscillator circuit 2b.
The light-emitting device according to claim 1, wherein the light-emitting device blinks as shown in FIG. 7B. 3. In the implementation of the invention, the LED element (5
1, 52, 53) and the phototransistor 44,
The light emitting device according to claim 1, wherein the light emitting device is directly mounted on the printed circuit board 9. 4. In the implementation of the invention, an LED element (5
1, 52, 53) and the phototransistor 44,
3. The light emitting device according to claim 1, wherein said light emitting device is connected to a bendable wire and mounted on a printed circuit board.