JPH06222732A - Light emitting diode device - Google Patents

Abstract

PURPOSE:To unnecessitate parts mounted outside and to enable a device to be and miniaturized and a manufacturing cost to be reduced by incorporating all driver circuits and enabling any of continuous lighting or interrupted lighting to be used. CONSTITUTION:V-DD (corresponding to a signal for intermittent lighting) inputted to a power supply terminal 101 drives intermittent circuit consisting of a oscillating circuit 1 and a frequency division circuit 2, its intermittent geomagnetic output is applied to a LED via an OR circuit 3 and a resistor 5 for restricting a current. Since V-DD is applied to the LED, intermittent lighting, that is, flickering is performed. And when a geomagnetic signal (a signal for continuous lighting) is inputted to a power supply terminal 103, this magnetic signal is applied to the LED via the OR circuit and the resistor 5, and turns on the LED continuously. And the oscillating circuit 1, the frequency division circuit and the OR circuit of a driver circuit are all constituted with transistors and diodes, etc., and can be easily mounted on an IC chip. And since circuit elements are few, can be incorporated in the LED.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode device, and more particularly to a light emitting diode device incorporating a drive circuit for continuously or intermittently lighting the light emitting diode.

[0002]

2. Description of the Related Art Conventionally, this type of light emitting diode (hereinafter referred to as LE
The device (referred to as D) is used as a display device in various devices for status display and the like, but in many cases, one LED performs two status displays by continuous and intermittent lighting operations. As a drive circuit for this purpose, an intermittent circuit for intermittently lighting the LED and a switching circuit for switching between intermittent and continuous lighting are required. In general, the intermittent circuit uses a combination of an oscillator and a frequency divider, or a tension oscillator, and the switching circuit uses a relay or diode. This drive circuit is either entirely attached externally to the LED, or an LED device having only an intermittent circuit is incorporated and only the switching circuit is externally attached.

[0003]

As described above, in the conventional example, the drive circuit is complicated because it uses a relay, etc.
Since it is difficult to incorporate it in D, and it is externally attached, it is disadvantageous in downsizing the device or reducing the cost.

[0004]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a (a) block diagram showing the circuit configuration of the present embodiment, and (b) an operation table showing the operation. In FIG. 1A, the oscillator circuit 1 and the frequency divider circuit 2 form an intermittent circuit. V-DD input to the first power supply terminal 101
(Corresponding to a signal for intermittent lighting) drives the intermittent circuit of the oscillation circuit 1 and the frequency dividing circuit 2, and its intermittent ground output is applied to the LED through the OR circuit 3 and the resistor 5 for current limiting. . Since V-DD is added to the LED, it lights up intermittently.
That is, it blinks.

When a ground signal (a signal for continuous lighting) is input to the second power supply terminal 103, this ground signal passes through the OR circuit 3 and the resistor 5 and is applied to the LED to continuously turn on the LED. Turn on the light. This operation is as shown in the operation table of FIG.

The oscillator circuit 1, the frequency divider circuit 2 and the OR circuit of the drive circuit described above are all composed of transistors, diodes, etc., and can be easily mounted on the IC chip.
Further, since the number of circuit elements is small, it can be built in the LED.

[0007]

As described above, the light emitting diode device of the present invention has all of the driving circuits built-in and can be used for continuous lighting or intermittent lighting, and no external parts are required. It is effective in downsizing and cost reduction.

[Brief description of drawings]

FIG. 1A is a block diagram showing a circuit configuration of this embodiment,
And (b) an operation table showing the operation.

[Explanation of symbols]

 1 oscillator 2 frequency divider 3 OR circuit 4 LED element 5 resistor

Claims (1)

[Claims] 1. An intermittent circuit for receiving and driving a first input signal for intermittent lighting, an OR circuit for coupling an output of the intermittent circuit and a second input signal for continuous lighting, and an output of the OR circuit. A light emitting diode device comprising a light emitting diode element for receiving and driving the device.